CN102573560B

CN102573560B - Toothbrush

Info

Publication number: CN102573560B
Application number: CN201080047303.9A
Authority: CN
Inventors: 奥田靖
Original assignee: Lion Corp
Current assignee: Lion Corp
Priority date: 2009-10-21
Filing date: 2010-10-06
Publication date: 2014-05-07
Anticipated expiration: 2030-10-06
Also published as: CN102573560A; KR20120053533A; KR101356263B1; MY168505A; WO2011048949A1

Abstract

A toothbrush configured so that a shock-absorbing section for preventing the bristles from bending is prevented from peeling away. A toothbrush (1) wherein a head section (2) in which the bristles are implanted is configured in such a manner that the surfaces between a bristle implanting surface (5) in which the bristles are implanted and side surfaces (6) which are adjacent to the bristle implanting surface (5) are rounded surfaces (7), that bristle implanting holes (4) are formed in the bristle implanting surface (5), and that the peripheral edges (42) of the bristle implanting holes (4) are formed as a shock-absorbing section (30) which consists of a resin having a lower hardness than the material of a base (20). The shock-absorbing section (30) is joined in the regions of the rounded surfaces (7) to the base (20). The joint surfaces (22) between the shock-absorbing surface (30) and the base (20) are sloped surfaces which slope to the outer sides of the head section (2) relative to the bristle implanting surface (5).

Description

Toothbrush

Technical field

The present invention relates to a kind of toothbrush.

The application according on October 21st, 2009 Japanese publication, No. 2009-242457, Patent and Patent 2009-242458 application requirement priority, and by its content quotation at this.

Background technology

The filament consisting of polyester based resins such as PTTs (PTT) is cheaper than nylon, utilizes the excellent in workability of medicine processing etc., and it is widely used as the bristle of toothbrush thus.In addition, it is comparatively excellent that polyester based resin extends recovery compared with nylon, therefore, in the case of as the bristle of toothbrush, has advantages of that high-quality green tea is difficult for bifurcated (Japanese: Open I).

Conventionally, the implantation on the pedestal consisting of compared with the raw material of hard acrylic resin (PP), PETG (PET) etc. of toothbrush has bristle, but, if bristle is used the filament of polyester based resin, on the one hand better for the durability of the bifurcated of bristle, and exist on the other hand root bending or be cut off the problem of (trichatrophia is disconnected).

This bristle fractures and results from the one hand, when scrubbing the base portion of bristle repeatedly encounter plant pore circumference, cause the fracture of bristle.In addition, this bristle reason on the other hand that fractures is, when the base portion of bristle is encountered the circumference of planting pore repeatedly, because this circumference consists of so cause the fracture of bristle hard raw material.

For this problem, proposed a kind of the elastomer resin of particular stiffness is overlayed on pedestal, elastomer resin, consists of the toothbrush (for example patent documentation 1) of the circumference of planting pore.This toothbrush is by using hardness is lower compared with pedestal elastomer resin to form circumference, disperses or relaxes while scrubbing to the stress of the base portion of bristle, suppresses thus trichatrophia and breaks.

In addition, a kind of toothbrush (for example patent documentation 2) of for example implementing chamfering at the circumference of planting pore has been proposed.When scrubbing by mitigation, this toothbrush to the stress of the base portion of bristle, suppresses trichatrophia disconnected.

Patent documentation 1: TOHKEMY 2007-6937 communique

Patent documentation 2: TOHKEMY 2007-6938 communique

But, for the pedestal of toothbrush, use acrylic resin (PP), PETG (PET) etc. compared with the raw material of hard.As Patent Document 1, in the case of having the circumference of planting pore (buffer part) consisting of elastomer resin, the adhering state of buffer part and pedestal is subject to the impact of the mutual cementability of resin.Therefore, although according to the material of pedestal, select elastomer resin, may be when scrubbing buffer part contact with tooth with the border of pedestal etc. and buffer part peeled off.

For this problem, although exemplified the enlarged areas of buffer part, make the bond area of buffer part and pedestal increase and improve the measure of adhesive strength, elastomer resin price is high, at economic aspect not preferred.In addition, when the side of pedestal etc. has buffer part, may be because cause buffer part to come off with contacting of tooth while scrubbing.

On the other hand, as described in patent documentation 1, for prevent that reason elastomer resin forms planting pore circumference (buffer part) and to produce trichatrophia disconnected, buffer part must be done to such an extent that enough thickly to obtain, prevent the effect that trichatrophia is disconnected.Its on the other hand, while buffer part being done blocked uply in order to prevent that trichatrophia is disconnected, brushhead self can thickening, usability declines.In order to keep usability, pedestal is done when thin, the pore of planting of pedestal shoals, and can not obtain the enough mao intensity of planting.

In addition, as described in patent documentation 2, implementing chamfering in the situation that planting pore circumference, exist the part of implementing after chamfering and remain the problems such as toothpaste.

Summary of the invention

Therefore, the first object of the present invention is to provide a kind of toothbrush, can suppress use amount for preventing the disconnected elastomer resin of trichatrophia and can prevent that buffer part from peeling off.

The second object of the present invention is to provide a kind of toothbrush, can keep usability, plants mao intensity and prevent that the trichatrophia of bristle is disconnected.

The first method of toothbrush of the present invention is, brushhead is implanted bristle, this brushhead plant bristle plant hair side and and this to plant between the side that hair side is adjacent be arc surface, described planting, on hair side, be formed with multiple pores of planting, and described in plant pore circumference be the buffer part being formed by the low resin of the material of hardness ratio pedestal, in this toothbrush, described buffer part engages with described pedestal in the region of described arc surface, and the composition surface of described buffer part and pedestal is when take the described inclined plane tilting to the outside of described brushhead while planting hair side as benchmark.

In the first method of toothbrush of the present invention, preferably, described composition surface is to be the inclined plane of 100～150 ° with respect to the described hair side of planting, preferably, on described composition surface, one party in described pedestal and described buffer part is formed with protuberance, and be formed with the recess chimeric with described protuberance the opposing party, preferably, thickness on the described pedestal of described buffer part is 0.1～1.0mm, preferably, the distance planting in hair side direction between the side of described brushhead and the outer peripheral edges of described buffer part is 0.1～0.9mm.

The second method of toothbrush of the present invention is, brushhead is implanted bristle, planting of this brushhead is formed with multiple pores of planting on hair side, and described in plant pore circumference be the buffer part being formed by the low resin of the material of hardness ratio pedestal, in this toothbrush, at the circumference of the peristome side of planting pore of described pedestal, be formed with diameter along with planting portion's direction in pore and the inclined plane of stenosis gradually to described, and be formed with described buffer part in the region comprising on described inclined plane.

In the second method of toothbrush of the present invention, preferably, described inclined plane is that bight chamfering is carried out to the angle of 45 ° and the face that presents from face separately in the bight of two orthogonal faces, preferably, chamfering is carried out with the angle of 45 ° in the position that described inclined plane is 0.1～0.8mm in the length of the intersecting lens of described two the orthogonal faces of distance, preferably, thickness on the described pedestal of described buffer part is 0.1～1.0mm, preferably, described planting on hair side, planting many bristle tuft bundles are formed and use flat flat wire one folding is the pieces that two ground plant.

Invention effect:

As one aspect of the present invention, because buffer part engages with pedestal in the region of arc surface, therefore, its boundary portion is difficult to contact with tooth etc. in scrubbing, and is difficult to produce peel off.In addition,, because the composition surface of buffer part and pedestal is with respect to planting hair side, in the time of therefore moulding can being prevented, near boundary portion, produce burr.So, can suppress the use amount of the elastomer resin that forms buffer part, and can prevent peeling off of buffer part that Yin Maoci causes.

As another aspect of the present invention, because composition surface is 100～150 ° with respect to planting hair side, in the time of therefore moulding can being prevented, produce burr.

As another aspect of the present invention, because the either party in pedestal and buffer part is formed with protuberance, and be formed with the recess chimeric with protuberance the opposing party, therefore, can further improve the cementability of buffer part and pedestal.

As another aspect of the present invention, because the thickness of buffer part is 0.1～1.0mm, therefore can further improve the cementability of buffer part and pedestal and can not damage the usability of toothbrush.

As another aspect of the present invention, because the side from brushhead is 0.1～0.9mm to the distance of the outer peripheral edges of buffer part, therefore can further improve the cementability of buffer part and pedestal and can not damage the usability of toothbrush and plant a mao intensity.

As another aspect of the present invention, owing to planting pore circumference, it is the buffer part being formed by the low resin of the material of hardness ratio pedestal, and the circumference of planting pore peristome side of pedestal be formed with diameter along with to described plant pore in portion's direction and the inclined plane of stenosis gradually, therefore can relax the stress that concentrates on bristle base portion, prevent that trichatrophia is disconnected.In addition, the intensity of pedestal can be guaranteed, usability and the enough mao intensity of planting can be kept.

As another aspect of the present invention, because inclined plane is C face, therefore can relax the stress of bristle base portion, prevent that trichatrophia is disconnected.

As another aspect of the present invention, because C face is C0.1～0.8mm, therefore can further improve and prevent the disconnected effect of trichatrophia and plant a mao intensity.

As another aspect of the present invention, because the thickness on the pedestal of buffer part is 0.1～1.0mm, therefore can further improve the effect that prevents that trichatrophia is disconnected.

As another aspect of the present invention, even plant many bristle tuft are pricked to the pieces forming with flat wire planting on hair side, also can guarantee to plant a mao intensity.

Accompanying drawing explanation

Fig. 1 is the top view of the toothbrush of an embodiment of the present invention.

Fig. 2 is the profile of the toothbrush of an embodiment of the present invention.

Fig. 3 is the profile of the toothbrush of an embodiment of the present invention.

Fig. 4 is the profile of the toothbrush of an embodiment of the present invention.

Fig. 5 is the top view of the toothbrush of an embodiment of the present invention.

Fig. 6 is the profile of the toothbrush of an embodiment of the present invention.

Fig. 7 is the part sectioned view of planting the toothbrush that pore describes under the state to planting bristle.

Symbol description:

1 toothbrush

2,102,202 brushhead

4 plant pore

5 plant hair side

6 sides

7 arc surfaces

20,120,220 pedestals

22,122,222 composition surfaces

30,130,230 buffer part

32 boundary portion

42 hole peripheral portions

124,232 protuberances

132,224 recesses

301 toothbrushes

302 brushhead

304 plant pore

305 plant hair side

320 pedestals

321 pedestal hole peripheral portions

322 inclined planes

330 buffer part

342 hole peripheral portions

The specific embodiment

The first method of toothbrush of the present invention is described with accompanying drawing below.

Fig. 1 is the diagram for toothbrush 1 of the present invention is described, is the top view of the set brushhead in handle portion (not shown) top that is illustrated in toothbrush 1, and Fig. 2 is the profile along II-II line in Fig. 1.In addition, for ease of explanation, omitted the diagram of bristle, only diagram is implanted the pore of planting that has bristle.

As shown in Figures 1 and 2, toothbrush 1 has brushhead 2, the planting hair side 5, and plant the side 6 that hair side is adjacent and plant between hair side 5 for arc surface 7 of the implantation bristle of this brushhead 2, and the radius of curvature R of arc surface 7 is 0.5～0.7mm left and right.

Brushhead 2 comprises: be formed with multiple pedestals of planting pore 4 20 that have bottom tube-like; And cover being formed with of this pedestal 20 and plant the buffer part 30 on the face 21 of pore 4.The hole peripheral portion 42 of thus, planting pore 4 consists of buffer part 30.The depth D that the distance of planting pore 4 is planted hair side 5 is 3.0～5.0mm left and right, and aperture d is 1.5～3.0mm left and right.

Buffer part 30 engages with pedestal 20 in the boundary portion 32 in the region of arc surface 7, and pedestal 20 is to plant the inclined plane that hair side 5 tilts to the lateral direction of brushhead 2 for benchmark with the composition surface 22 of buffer part 30.Thus, buffer part 30 is set as its boundary portion 32 and is positioned at the inner side compared with the profile of seeing with overlooking of brushhead 2.The angle of inclination on composition surface 22 without particular limitation of, but the angle θ being formed with the imaginary plane Q parallel with planting hair side 5 by the inclined plane P on composition surface 22 is preferably 100～150 °, is particularly preferably 115～135 °.

The material of pedestal 20 considers that the desired rigidity of toothbrush 1, mechanical property etc. decide, and for example, by using crooked elastic rate (JIS K7203), is that high hardness resin in 500～3000MPa scope obtains the needed mechanical property of toothbrush 1.As this high hardness resin, such as PP, PET, polystyrene resin (PS), acrylonitrile-butadiene-styrene resin (ABS), cellulose propionate resin (CP), poly-aryl ester resin, polycarbonate resin, acrylonitrile-styrene resin (AS) etc. can be exemplified, they one or more can be used.

Under projection state, the profile of brushhead 2 that pedestal 20 outermost perimembranous form and the edge of boundary portion 32 apart from l, the distance of planting in hair side direction of 6 outer peripheral edges to buffer part 30 is preferably 0.1～0.9mm from the side, is particularly preferably 0.2～0.5mm.While being less than 0.1mm, hinder the moulding of pedestal 20, while exceeding 0.9mm, brushhead 2 becomes large, the operability variation of toothbrush 1.

Buffer part 30 is formed by the low resin of hardness ratio pedestal 20 (soft resin), this hardness is measured according to " JIS K6253 hardness test, experimental condition JIS A ", the hardness of measuring by JIS K6253 is for example preferably 5～100, is particularly preferably 15～90.

As this soft resin, can exemplify for example polyolefin thermoplastic elastomer (TPE), polystyrene thermoplastic elastomer (TPE), polyurethane based thermoplastic elastomer, polyester based thermoplastic elastomer, 1, the thermoplastic elastomer (TPE) (TPEE) of 2-polybutadiene based thermoplastic elastomer, ethylene-vinyl acetate based thermoplastic elastomer, polyvinyl chloride thermoplastic elastomer (TPE), natural rubber based thermoplastic elastomer and fluorine based thermoplastic elastomer, trans isoprene thermoplastic elastomer (TPE) and so on etc.

Thickness t on 20 21 of the pedestals of buffer part 30 is considered to plant the material of the depth D of pore 4 and aperture d, bristle etc. and is decided, for example, be preferably 0.1～1.0mm, is particularly preferably 0.2～0.8mm, is more preferably 0.3～0.7mm.If more than 0.1mm, can improve the cementability of buffer part 30 and pedestal 20, and can relax while scrubbing to the stress of the base portion of bristle and to suppress trichatrophia disconnected, if below 1.0mm, can guarantee to plant pore 4 bristle plant a mao intensity.

The material of bristle without particular limitation of, can use toothbrush known material used.As the material of bristle, can exemplify such as polyester monocase or the polyester based resin take polyester as principal component, nylon monomer or the nylon take nylon as principal component is the polyolefin monomers such as resin, polypropylene or polyethylene or the olefin-based resin take polyolefin as principal component etc., and wherein polyester based resin is comparatively preferred.Because the trichatrophia that polyester based resin easily produces base portion place than other material is disconnected, the effect that therefore buffer part 30 is set is comparatively remarkable expressively.As polyester based resin, can exemplify PET, polybutene terephthalate (PBT) and PTT (PTT) etc., wherein PTT is more preferred.Because it is disconnected that in polyester based resin, PTT easily produces trichatrophia, the effect that therefore buffer part 30 is set is comparatively remarkable expressively.

The thickness of bristle without particular limitation of, be for example the scope of 6～11mil (i.e. 0.152～0.279mm, here 1mil=1/1000inch).In addition, the shape of cross section of bristle is mainly circular, but also without particular limitation of this shape.For example, also there is the bristle of triangle, square, hexagon or petal shape iso-cross-section shape, or the bristle they being combined.In addition, both can use bristle global shape to be processed in advance the bristle of such as wavy, helical form or zigzag etc., also can use the bristle that they are combined.

In addition, as bristle, both can use external diameter except high-quality green tea rounded portions is roughly the same bristle, also can use external diameter along with to high-quality green tea and the bristle of tapered taper.In addition, but also such as spade (Japanese: ヘラ shape), sharp thin fabric width shape or spherical etc. of the end shape of bristle.

Bristle conventionally take the pieces that forms by many in a unit is implanted in pore 4, each bristle lengths both can be equally long, also can different length.In addition, the high-quality green tea contour shape of pieces (cutting a mao shape), except flat shape, also can be made cheese, depression shape or concavo-convex stairstepping etc.

The manufacture method of toothbrush 1 of the present invention is described below.This manufacture method has following operation: molding procedure, this molding procedure forming pedestal 20 (one-shot forming), buffer part 30 (post forming) is set on obtained pedestal 20, obtains the brush holder with brushhead 2 and handle portion (not shown); And plant a mao operation, this is planted mao operation bristle is planted in the brushhead 2 of described brush holder.

One-shot forming is such operation: a pair of mould that the chamber corresponding with pedestal 20 formed, penetrates the resin (being sometimes referred to as resin one time) that forms pedestal 20, forming pedestal 20 to described chamber.

Post forming is then such operation: use a pair of secondary mould that is formed with the chamber corresponding with brush holder, the pedestal 20 that one-shot forming is obtained is enclosed in the chamber of secondary mould, to secondary mould, penetrate the resin (being sometimes referred to as secondary resin) that forms buffer part 30, buffer part 30 is set on pedestal 20.When being incorporated with pedestal 20 in chamber, the space forming between packed into pedestal 20 and chamber of the chamber of secondary mould becomes the shape corresponding with buffer part 30.

Secondary mould has: form first composite die of planting hair side 5 one sides; And by the second fixing composite die of brushhead 2 bottom surface 8 sides, (parting line) carries out chimeric using chain-dotted line O as PL for the first composite die and the second composite die.In addition, PL be positioned at plant hair side 5 and bottom surface 8 roughly in the middle of, and plant hair side 5 almost parallels.

Plant mao operation and be in the brushhead 2 of the brush holder obtaining the operation that plants bristle, makes toothbrush 1 in post forming.Planting of bristle can be used known fur planting method, for example can exemplify such flat wire and plant a mao method: by the pieces being formed by many bristles one folding, be two, between it, clip anti-avulsion parts (flat wire), this flat wire is packed into and plants the interior fixing pieces of pore 4.This flat wire can be used known flat wire in the past, can exemplify the flat flat wire of for example brass or aluminum.

The size of flat wire and shape can consider that aperture of planting pore 4 etc. decides.In addition, packing the length of planting the flat wire in pore 4 into is not particularly limited, preferably make and can keep pieces and can not make brush holder produce the length of splitting or whitening when planting mao, for example, preferably make the long 0.3～0.5mm of long axis length that packs direction than the flat wire of planting pore 4 into.In addition, although flat wire packs angle into, can freely select, for fear of the generation of splitting or whitening, preferably make and with respect to the length direction of brush holder, be the scope of 5～80 ° and be particularly preferably 15～30 °.In addition, flat wire packs angle into needn't be all identical in planting pore 4, also can make often plant pore 4 not identical pack angle into.

As mentioned above, as one aspect of the present invention, because the hole peripheral portion 42 of planting pore 4 consists of buffer part 30, therefore, can relax the stress to bristle base portion while scrubbing, suppress the disconnected generation of trichatrophia.In addition, while scrubbing, the free degree of bristle activity increases, and bristle easily enters the gap of waiting between tooth, improves cleaning power.In addition, because the free degree by making bristle activity increases, make bristle flexibly movable, therefore, bristle lengths can be shortened, improve the operability of toothbrush 1.

As another aspect of the present invention, because pedestal 20 and the boundary portion 32 of buffer part 30 are positioned at the region of arc surface 7, therefore, while scrubbing, boundary portion 32 is difficult for contacting with tooth etc., can prevent peeling off, coming off of buffer part 30.

As another aspect of the present invention, because pedestal 20 is the inclined planes towards brushhead 2 outsides with the composition surface 22 of buffer part 30, therefore can prevent from boundary portion 32 places, producing burr when brush holder moulding, can prevent peeling off of the caused pedestal 20 of Yin Maoci and buffer part 30.

In post forming, when as described in conventional art (patent documentation 1 etc.), when the tiltangleθ on composition surface 22 is 90 °, pedestal 20 is subject to the first composite die compressing, and composition surface 22 tilts to planting pore 4 directions.When composition surface 22 is to planting pore 4 while tilting, between the first composite die and arc surface 7, just produce gap.Under this state, when penetrating secondary resin, secondary resin just flows into the gap between arc surface 7 and the first composite die, easily forms burr.

Because the composition surface 22 of the toothbrush 1 of the present invention's one mode is to the outer lateral incline of brushhead 2, therefore, even if pedestal 20 is subject to the compressing of the first composite die, composition surface 22 also can not roll tiltedly to planting pore 4 easily, can prevent from producing gap between arc surface 7 and the first composite die.Its result is difficult to produce burr near boundary portion 32, can prevent when scrubbing peeling off, coming off etc. because of the caused buffer part 30 of burr.In addition,, because the space (runner) of filling secondary resin is guaranteed, therefore can prevent the lack of fill (lacking material injection) of secondary resin.

The present invention is not limited to above-mentioned embodiment.

For example, on composition surface, can also the either party in pedestal and buffer part be formed with protuberance, and be formed with the recess chimeric with described protuberance the opposing party.

For example, brushhead 102 is as shown in Figure 3 such, and pedestal 120 is also formed at the protuberance 124 of pedestal 120 with the composition surface 122 of buffer part 130 and is formed at the recess 132 of buffer part 130 composition surface after chimeric.

In addition, for example, brushhead 202 is as shown in Figure 4 such, and pedestal 220 is also formed at the recess 224 of pedestal 220 with the composition surface 222 of buffer part 230 and is formed at the protuberance 232 of buffer part 230 composition surface after chimeric.

In addition,

protuberance

124 and 232 is also formed with the protuberance of the juts such as multiple for example taper shape, square taper, cylindric and flat column, also but along composition surface, be formed as banded rib etc.

In the above-described embodiment, planting pore is to have round-ended cylinder shape, but the shape of planting pore is not particularly limited, for example also ellipse or polygon etc. of its cross section.

In the above-described embodiment, utilize flat wire to plant a mao method pieces is planted to hair, but fur planting method is not limited thereto.For example, also can use and the lower end of pieces is pressed into the hot fusing method being fixed and molten resin is injected to die for molding after the lower end of pieces is added to thermosetting molten mass and plant in the type of mao portion (In mold) method of processing etc. in planting the molten resin of mao portion.

The second method of toothbrush of the present invention then, is described with accompanying drawing below.Fig. 5 is the figure for toothbrush 301 of the present invention is described, it is the top view of the brushhead on the top of the handle portion (not shown) that represents to be located at toothbrush 301, and Fig. 6 is the profile along II-II line in Fig. 5.In addition, for ease of explanation, omitted the diagram of bristle, only diagram is implanted the pore of planting of bristle.

As shown in Figures 5 and 6, toothbrush 301 has brushhead 302, and this brushhead 302 is manyly planted pore 304 and formed the hole peripheral portion 342 of planting pore 304 by the buffer part 330 being located on pedestal 320 planting to be formed with on hair side 305.In brushhead 302, plant hair side 305 and be adjacent and be arc surface 307 between the side 306 of bottom surface 308, the radius of curvature of arc surface 307 is 0.5～0.7mm left and right.The size of brushhead 302 is 7.0～12.0mm left and right without particular limitation of, its width W, and its thickness T is 3.0～6.0mm left and right.

Brushhead 302 plant hair side 305 sides be formed with multiple have a round-ended cylinder shape plant pore 304, the depth D 1 that the distance of planting pore 304 is planted hair side 305 is 2.0～5.0mm left and right, aperture d is 1.0～3.0mm left and right.In addition, the depth D of planting pore 304 2 in pedestal 320 is for example 1.5～4.5mm left and right.If depth D 2 in above-mentioned scope, can be used for firmly fixing anti-avulsion part described later (flat wire).

As shown in Figure 7, the pieces consisting of many bristles 310 is two by a folding and utilizes the flat wire 314 being clipped in to be therebetween fixed on and plant in pore 304.Here, symbol 313 represents that the part that being inserted in pieces 312 planted in pore 304 is base portion.

In pedestal 320 plant pore 304 circumferences, pedestal hole peripheral portion 321 be formed with diameter along with to plant pore 304 in portion's direction be hole bottom 344 and the inclined plane 322 of stenosis gradually.In the present embodiment, inclined plane 322 is C faces, and this C face is preferably C0.1～0.8mm, is particularly preferably C0.1～0.5mm, is more preferably C0.2～0.4mm.While being less than C0.1mm, prevent that the disconnected effect of trichatrophia is likely insufficient, while exceeding 0.8mm, likely the adjacent interval of pore 304 between mutually of planting expands, and brushhead 302 becomes large, and usability declines.

In this manual, so-called C face, refer to bight chamfering is carried out to the angle of 45 ° and the face that presents from face separately in the bight of two orthogonal faces, while representing numerical value when ining succession with described C, chamfering is carried out with the angle of 45 ° in the position that the length that is illustrated in the intersecting lens of described two the orthogonal faces of distance is this numerical value (conventionally using mm unit representation).For example, when being expressed as C0.5mm, chamfering is carried out with the angle across corner of 45 ° in the position that to be illustrated in the bight (intersecting lens) of leaving two orthogonal faces be 0.5mm.

In addition, the outer peripheral edges of buffer part 330 are that boundary portion 332 is regions of arc surface 307.Compared with the profile of the brushhead 302 that thus, boundary portion 332 forms with the outermost perimembranous of pedestal 320, become the inner side of planting hair side 305 directions.

The material of pedestal 320 can consider that the desired rigidity of toothbrush 301 and mechanical property etc. decide, and specifically, can exemplify with material as aforementioned pedestal 20 and the same high hardness resin of illustrative high hardness resin.

Buffer part 330 is formed at the region that comprises on inclined plane 322, form that to plant pore 304 circumferences be hole peripheral portion 342, the inner peripheral surface 334 of buffer part 330 be made into pedestal 320 in plant roughly same of the inner peripheral surface 324 of pore 304.

Thickness t on the pedestal 320 of buffer part 330 can consider that depth D and aperture d, bristle 310 materials etc. of planting pore 304 decide, for example, be preferably 0.1～1.0mm, be particularly preferably 0.3～0.8mm, more be preferably 0.4～0.7mm, be particularly preferably 0.5～0.6mm.When 0.1mm is above, can improve the cementability of buffer part 330 and pedestal 320, and can relax the stress to base portion while scrubbing and to suppress trichatrophia disconnected, in the time of below 1.0mm, can guarantee the usability of toothbrush 301, and can guarantee to plant mao intensity of planting of bristle 310 in pore 304.In addition,, if in above-mentioned scope, in the time of moulding can being prevented, form the lack of fill (lacking material injection) of the resin of buffer part 330.

For material and the hardness thereof of buffer part 330, identical with aforementioned buffer part 30, buffer part 330 soft resin used to exemplify exemplifying of soft resin also used with aforementioned buffer part 30 identical.

The mode of material, thickness, shape, length and the pieces thereof of bristle 310 is identical with aforementioned toothbrush 1 bristle, and its object lesson is also identical.

Material, size and the shape of flat wire 314 is identical with aforementioned flat wire 14, and its object lesson is also identical.In addition, as the preferred example that packs angle into of described flat wire 314, can exemplify with aforementioned flat wire 14 better and pack the example that angle is identical into.

The manufacture method of toothbrush 301 of the present invention is described below.This manufacture method has following operation: molding procedure, this molding procedure is forming pedestal 320 (one-shot forming), buffer part 330 (post forming) is set on obtained pedestal 320, obtains having the brush holder of brushhead 302 and handle portion (not shown); And plant a mao operation, this is planted mao operation bristle 310 is planted in the brushhead 302 of described brush holder.

One-shot forming is such operation: a pair of mould that the chamber corresponding with pedestal 320 formed, penetrates the resin (being sometimes referred to as resin one time) that forms pedestal 320, forming pedestal 320 to described chamber.

Post forming is then such operation: use a pair of secondary mould that is formed with the chamber corresponding with brush holder, the pedestal 320 that one-shot forming is obtained is enclosed in the chamber of secondary mould, to secondary mould, penetrate the resin (being sometimes referred to as secondary resin) that forms buffer part 330, buffer part 330 is set on pedestal 320.When being incorporated with pedestal 320 in chamber, the space forming between packed into pedestal 320 and chamber of the chamber of secondary mould becomes the shape corresponding with buffer part 330.

Planting a mao operation, is the operation that plants bristle 310 in the brushhead 302 of the brush holder that obtains in post forming, make toothbrush 301.Planting of bristle 310 can be used the known mao device of planting, for example, can plant a mao device by flat wire formula.

Adopt the present invention, because hole peripheral portion 342 consists of buffer part 330, therefore, can relax the stress producing at base portion 313 when scrubbing by buffer part 330.Its result, can prevent that bristle 310 from producing trichatrophia disconnected.In addition, because inclined plane 322 is C faces, therefore, can not increase and plant the depth D 1 of pore 304 and the thickness t of buffer part 330 is made and is enough to the thickness that prevents that trichatrophia is disconnected, and the depth D of planting pore 304 2 in pedestal 320 can be made and can be obtained enough degree of depth of planting mao intensity.Its result, can keep the usability of toothbrush 301 and plant a mao intensity, and can prevent that the trichatrophia of bristle 310 is disconnected.

In addition, by C face is made in inclined plane 322, thus, pedestal 320 and the bonding area of buffer part 330 are expanded, can improve the bonding force of pedestal 320 and buffer part 330, and further improve the mitigation for the stress to base portion 313.

The present invention is not limited to above-mentioned embodiment.

In the above-described embodiment, although the inclined plane of pedestal hole peripheral portion is C face, but as long as the diameter on this inclined plane to plant pore in portion and stenosis gradually, this inclination angle can be determining in the scope of for example 20～70 °, preferred 30～60 ° of benchmark to plant hair side.In addition, inclined plane can be also for example arc surface.But, from improving, preventing the viewpoint of the disconnected effect of trichatrophia, inclined plane is preferably C face, is that to plant hair side be the face that benchmark forms with 45 °, inclination angle chamfering.

In the above-described embodiment, planting pore is to have round-ended cylinder shape, but the shape of planting pore for example, without particular limitation of, also ellipse or polygon etc. of its cross section.

In the above-described embodiment, by flat wire formula, plant hair and plant pieces, but for example also can utilize following method etc. to plant pieces: the lower end of pieces is pressed into the hot fusing method being fixed and molten resin is injected to die for molding after the lower end of pieces is added to thermosetting molten mass and plant and in the type of mao portion, process (In mold) method etc. in planting the molten resin of mao portion.

Embodiment:

Embodiment 1A～5A:

According to the specification of table 1A, made the toothbrush identical with the toothbrush 1 shown in Fig. 1.A resin that forms pedestal is used PP, and the secondary resin that forms buffer part is used styrene series elastomer resin (hardness 60).20 bristles of PTT system (φ 0.2mm) are made pieces, be two and pack 23 into plant (250shot/min) in pore together with flat wire with feather planting machine (ZAHORANSKY company system) by described pieces one folding.

For the toothbrush of each example of making, to lacking material injection, burr generation, the difficulty of peeling off and planting mao intensity and evaluate, its result is illustrated in 1A.

Comparative example 1A:

The angle on composition surface be made to 180 ° with plant that hair side is parallel, boudary portion is in lateral side regions, in addition all the other and embodiment 1A make toothbrush in the same manner.For the toothbrush of making, lack material injection, burr generation, the difficulty of peeling off and plant mao intensity and evaluate, its result is illustrated in 1A.

Comparative example 2A:

The angle on composition surface is made to 90 °, boudary portion in planting the region of hair side, in addition all the other and embodiment 1A make toothbrush in the same manner.For the toothbrush of making, lack material injection, burr generation, the difficulty of peeling off and plant mao intensity and evaluate, its result is illustrated in 1A.

Table 1A:

Lack the evaluation of material injection:

The evaluation that lacks material injection is the toothbrush of confirming each example with visual, according to following metewand, its result is carried out to evaluation of classification.

Metewand:

B: the shape of not finding out buffer part produces defect and distortion.

C: although do not find out that the shape of buffer part produces large distortion, find that defect appears in a part.

D: the shape of finding out buffer part produces large distortion.

Burr produces:

The evaluation that burr produces is to have or not burr to produce with the each routine toothbrush of Visual Confirmation, according to following metewand, carries out evaluation of classification.

Metewand:

A: do not find out generation burr completely.

B: 20% the area discover of being less than in boundary portion produces burr.

C: at the more than 20% of boundary portion, be less than 30% area discover and produce burr.

D: find out in more than 30% region of boundary portion and produce burr.

The difficulty of peeling off:

The difficulty of peeling off is that 5 people of supervision use each routine toothbrush, and the mean value of the access times according to following metewand to the moment that can confirm boundary portion and peel off carries out evaluation of classification.

Metewand:

A: when access times are 200 times, can not confirm to peel off.

B: at access times be more than 100 times, while being less than 200 times, confirmed to peel off.

C: at access times be more than 50 times, while being less than 100 times, confirmed to peel off.

D: when being less than 50 times, confirmed to peel off at access times.

Plant a mao intensity:

Planting mao intensity is to utilize special implement to catch a pieces of planting in pore, measured to from planting the maximum tensile stress (N) (draw speed 20mm/min, n=20) till pore is extracted pieces with accurate universal testing machine (Shimadzu Scisakusho Ltd's manufacture).This measured value is pressed and stated metewand and classify, to planting mao intensity, evaluate.In addition, the measured value in table and evaluation result are all documented in parantheses.

Metewand:

More than a:25N.

B:20N is above, be less than 25N.

C:15N is above, be less than 20N.

D: be less than 15N.

Overall merit:

According to following metewand, to lacking material injection, burr generation, the difficulty of peeling off and the result of planting mao intensity, classify and made overall merit.

Metewand:

A: the evaluation that lacks material injection is " b ", burr generation, the difficulty of peeling off and the evaluation of planting mao intensity are " b " or " a ".

B: the evaluation that lacks material injection is " b ", burr produces, the difficulty of peeling off and the evaluation of planting mao intensity are " c "～" a ", and " c " be more than one, or, the evaluation that lacks material injection is " c ", and burr generation, the difficulty of peeling off and the evaluation of planting mao intensity are " b "～" a ".

C: the evaluation that lacks material injection is " c ", burr generation, the difficulty of peeling off and the evaluation of planting mao intensity are " c "～" a ", and " c " is more than one, or, for having one " d " in the evaluation that lacks material injection, burr generation, the difficulty of peeling off and plant mao intensity.

D: for having two above " d " in the evaluation that lacks material injection, burr generation, the difficulty of peeling off and plant mao intensity.

Shown in table 1A, applied embodiments of the invention 1A～5A, its burr produces be evaluated as " b " or " a ", be good, the difficulty of peeling off be evaluated as " b " or " a ", be good.In addition, the overall merit of embodiment 1A～5A is " b " or " a ", is lacking evaluate in being suitable for manufacturing and planting mao intensity of evaluation aspect the difficulty that material injection, burr produce and peel off functional all excellent.

On the other hand, the evaluation that the angle on composition surface is made to the difficulty of peeling off in the comparative example 1A of 180 ° is " d ".In the angle on composition surface is the comparative example 2 of 90 °, the evaluation that lacks material injection is " d ".

Judge thus: by making composition surface, with respect to planting hair side, tilt, thereby can keep the difficulty of peeling off and plant a mao intensity, and can prevent that scarce material injection and burr from producing.In addition, also judge: owing to having applied toothbrush of the present invention, can prevent that burr from producing, and therefore can suppress peeling off of buffer part.

Embodiment 1B～8B:

According to the specification of table 1B, made the toothbrush identical with the toothbrush 301 shown in Fig. 5 (inclined plane 322:C face).A resin that forms pedestal has been used PP, and the secondary resin that forms buffer part has been used styrene series elastomer resin (hardness 60).20 bristles of PTT system (φ 0.2mm) are made to pieces, with feather planting machine (ZAHORANSKY company system), by described pieces one folding, be two and pack 23 into plant (250shot/min) in pore together with flat wire.

For the toothbrush of each example of made, to durability, plant a mao intensity, brushhead intensity and usability and evaluate, its result is illustrated in 1B.

Comparative example 1B:

Except being equivalent to the face on the inclined plane 322 shown in Fig. 5, being made to and planting the face of hair side almost parallel, all the other and embodiment 1B make toothbrush in the same manner.

For the toothbrush of made, to durability, plant a mao intensity, brushhead intensity and usability and evaluate, its result is illustrated in 1B.

The evaluation of durability:

What correspondence had been supposed molar process denture scrubs plate (stainless steel), with load 400g, stroke 40mm, 240rpm, back and forth scrubs, and the toothbrush of having studied each example produces trichatrophia and scrubs number of times when disconnected.Press and state metewand this is scrubbed number of times and is classified, evaluated durability.In addition, when back and forth scrubbing, the aqueous solution that is 50% as the mass fraction of scrubbing liquid and used the toothpaste that market sells.

Metewand:

A: do not produce trichatrophia disconnected in the time of 150,000 times.

B: produce trichatrophia disconnected more than 100,000 times, while being less than 150,000 times.

C: produce trichatrophia disconnected more than 50,000 times, while being less than 100,000 times.

D: produce trichatrophia disconnected when being less than 50,000 times.

Plant a mao intensity:

Utilize special implement to catch a pieces of planting in pore, with accurate universal testing machine (Shimadzu Scisakusho Ltd's manufacture), measured till extract the maximum tensile stress (N) (draw speed 20mm/min, n=20) of pieces from planting pore.This measured value is pressed and stated metewand and classify, to planting mao intensity, evaluate.In addition, the measured value in table and evaluation result are all documented in parantheses.

Metewand:

More than a:25N.

B:20N is above, be less than 25N.

C:15N is above, be less than 20N.

D: be less than 15N.

Brushhead intensity:

Prepared the toothbrush of each example to plant the level and smooth sample of hair side side from what plant that the bristle that pore stretches out cuts off, makes brushhead.This sample is fixed on to digital shock machine (DG-1 type, Toyo Co., Ltd.'s essence mechanism is done manufacturing) upper, from planting hair side side, with 0.5J, applies load, the absorption energy (J) while having measured the fracture of (n=10) brushhead.This measured value is pressed and stated metewand and classify, brushhead intensity is evaluated.In addition, in table, measured value and evaluation result are all documented in parantheses.

Metewand:

More than a:0.3J.

B:0.2J is above, be less than 0.3J.

C:0.1J is above, be less than 0.2J.

D: be less than 0.1J.

The evaluation of usability:

Usability is to scrubbing in 10 testees' oral cavity, by testee's sense organ, evaluates.Specifically, for intraoral operability, " operability no problem " in the situation that, be evaluated as 3 points, in the situation of " feel that brushhead is slightly large, but operability no problem ", be evaluated as 2 points, " operability is poor " in the situation that, be evaluated as 1 point.The average mark of the mark being obtained by this sensory evaluation is pressed and stated metewand and classify, usability is evaluated.In addition, in table, average mark and evaluation result are all documented in parantheses.

Metewand:

More than a:2.5 divides.

That b:2.0 divides is above, be less than 2.5 points.

That c:1.5 divides is above, be less than 2.0 points.

D: be less than 1.5 points.

Overall merit:

Take long duration test, plant a mao intensity, brushhead intensity and usability (being generically and collectively referred to as assessment item) evaluation result as basis, press and state metewand and classify, made overall merit.

Metewand:

A: long duration test, plant a mao intensity, brushhead intensity be respectively evaluated as " b " or " a " and " a " is more than two, being evaluated as of usability " b " or " a ".

B: long duration test, plant a mao intensity, brushhead intensity be respectively evaluated as " b " or " a " and " a " is more than two, being evaluated as of usability " c ", or, long duration test, plant a mao intensity, brushhead intensity be respectively evaluated as " b " or " a " and " a " is below one, the evaluation of usability is " c "～" a ".

C: long duration test, plant a mao intensity, brushhead intensity be respectively evaluated as " c "～" a " and " c " is more than one, the evaluation of usability is " c "～" a ".

D: any in assessment item is " d ".

As show as shown in 1B, applied embodiments of the invention 1B～8B, its durability, plant a mao intensity, brushhead intensity is all good.

On the other hand, pedestal hole peripheral portion is not made to the mark of durability of the comparative example 1B on inclined plane poor.

Utilizability in industry:

Adopt the present invention, can provide so a kind of toothbrush: can suppress the use amount for preventing the disconnected elastomer resin of trichatrophia, and can prevent peeling off of buffer part.In addition, can provide so a kind of toothbrush: can keep usability, plant a mao intensity, and can prevent that the trichatrophia of bristle is disconnected.

Claims

1. a toothbrush, brushhead is implanted bristle, this brushhead plant bristle plant hair side and and this to plant between the side that hair side is adjacent be arc surface, described planting, on hair side, be formed with multiple pores of planting, and described in plant pore circumference be the buffer part being formed by the low resin of the material of hardness ratio pedestal, this toothbrush is characterised in that

Described buffer part engages with described pedestal in the region of described arc surface,

The composition surface of described buffer part and pedestal is when take the described inclined plane tilting to the outside of described brushhead while planting hair side as benchmark.

2. toothbrush as claimed in claim 1, is characterized in that, described composition surface is to be the inclined plane of 100～150 ° with respect to the described hair side of planting.

3. toothbrush as claimed in claim 1 or 2, is characterized in that, on described composition surface, the one party in described pedestal and described buffer part is formed with protuberance, and is formed with the recess chimeric with described protuberance the opposing party.

4. toothbrush as claimed in claim 1 or 2, is characterized in that, the thickness on the described pedestal of described buffer part is 0.1～1.0mm.

5. toothbrush as claimed in claim 1 or 2, is characterized in that, the distance planting in hair side direction between the side of described brushhead and the outer peripheral edges of described buffer part is 0.1～0.9mm.

6. toothbrush as claimed in claim 3, is characterized in that, the thickness on the described pedestal of described buffer part is 0.1～1.0mm.

7. toothbrush as claimed in claim 3, is characterized in that, the distance planting in hair side direction between the side of described brushhead and the outer peripheral edges of described buffer part is 0.1～0.9mm.

8. toothbrush as claimed in claim 4, is characterized in that, the distance planting in hair side direction between the side of described brushhead and the outer peripheral edges of described buffer part is 0.1～0.9mm.

9. a toothbrush, brushhead is implanted a bristle, planting of this brushhead is formed with multiple pores of planting on hair side, and described in plant pore circumference be the buffer part being formed by the low resin of the material of hardness ratio pedestal, this toothbrush is characterised in that,

At the circumference of the peristome side of planting pore of described pedestal, be formed with diameter along with planting portion's direction in pore and the inclined plane of stenosis gradually to described, and

In the region comprising on described inclined plane, be formed with described buffer part.

10. toothbrush as claimed in claim 9, is characterized in that, described inclined plane is that bight chamfering is carried out to the angle of 45 ° and the face that presents from face separately in the bight of two orthogonal faces.

11. toothbrushes as claimed in claim 10, is characterized in that, chamfering is carried out with the angle of 45 ° in the position that described inclined plane is 0.1～0.8mm in the length of the intersecting lens of described two the orthogonal faces of distance.

12. toothbrushes as described in any one in claim 9～11, is characterized in that, the thickness on the described pedestal of described buffer part is 0.1～1.0mm.

13. toothbrushes as described in any one in claim 9～11, is characterized in that, described in plant on hair side, plant and many bristle tuft pricked to form and use flat flat wire one folding be the pieces that two ground plant.

14. toothbrushes as claimed in claim 12, is characterized in that, described in plant on hair side, plant and many bristle tuft pricked to form and use flat flat wire one folding be the pieces that two ground plant.