CN102573560A

CN102573560A - Toothbrush

Info

Publication number: CN102573560A
Application number: CN2010800473039A
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: 2012-07-11
Anticipated expiration: 2030-10-06
Also published as: KR101356263B1; WO2011048949A1; CN102573560B; MY168505A; KR20120053533A

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 is according to being willing to 2009-242457 number and specially being willing to that 2009-242458 number application requires priority japanese publication, special on October 21st, 2009, and with its content quotation at this.

Background technology

The filament that is made up of PTT polyester based resins such as (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, polyester based resin is compared the elongation recovery with nylon comparatively excellent, therefore under the situation of the bristle that is used as toothbrush, has the advantage that high-quality green tea is difficult for bifurcated (Japanese: open I).

Usually; On the pedestal that is made up of than the raw material of hard acrylic resin (PP), PETG (PET) etc., implanting of toothbrush has bristle; But; If bristle uses the filament of polyester based resin, then better for the durability of the bifurcated of bristle on the one hand, and exist the root bending on the other hand or be cut off the problem of (trichatrophia is disconnected).

This bristle fractures and results from the one hand, and the base portion of bristle is run into the circumference of planting pore, the fracture that causes bristle repeatedly when scrubbing.In addition, this bristle fractures on the other hand that reason is, when the base portion of bristle is run into the circumference of planting pore repeatedly, because this circumference is made up of so cause the fracture of bristle the hard raw material.

For this problem, proposed a kind of elastomer resin and overlayed on the toothbrush (for example patent documentation 1) that constitutes the circumference of planting pore on the pedestal, by elastomer resin particular stiffness.This toothbrush is compared the lower elastomer resin of hardness and is constituted circumference through using with pedestal, disperse or relaxes when scrubbing the stress to the base portion of bristle, suppresses trichatrophia thus 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.To the stress of the base portion of bristle, it was disconnected to suppress trichatrophia when this toothbrush was scrubbed through mitigation.

Patent documentation 1: TOHKEMY 2007-6937 communique

Patent documentation 2: TOHKEMY 2007-6938 communique

Yet,, use the raw material than hard such as acrylic resin (PP), PETG (PET) for the pedestal of toothbrush.Shown in patent documentation 1, under the situation with the circumference of planting pore (buffer part) that is made up of elastomer resin, the adhering state of buffer part and pedestal receives the influence of the mutual cementability of resin.Therefore, though select elastomer resin according to the material of pedestal, maybe be when scrubbing buffer part and the border of pedestal contact with tooth etc. and buffer part peeled off.

For this problem, though given an example the enlarged areas of buffer part, the bond area that makes buffer part and pedestal are increased and the measure that improves adhesive strength, the elastomer resin price is high, at economic aspect and not preferred.In addition, when the side of pedestal etc. has buffer part, maybe be because cause buffer part to come off with contacting of tooth when scrubbing.

On the other hand, of patent documentation 1, for prevent that the reason elastomer resin from constituting planting pore circumference (buffer part) and to produce trichatrophia disconnected, buffer part must do enough thick effect to obtain to prevent that trichatrophia is disconnected.Its on the other hand, when doing buffer part blocked up in order to prevent that trichatrophia is disconnected, brushhead self can thickening, usability descends.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, of patent documentation 2, implementing under the situation of chamfering planting the pore circumference, exist that the part of implementing after the chamfering is residual to have a problem such as toothpaste.

Summary of the invention

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

Second purpose 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.

First mode of toothbrush of the present invention is; Brushhead is implanted has bristle; This brushhead plant bristle plant hair side and and this to plant between the adjacent side of hair side be arc surface; Be formed with a plurality of pores of planting on the hair side said planting, and the said buffer part of circumference for forming by the low resin of the material of hardness ratio pedestal of planting pore, in this toothbrush; Said buffer part engages with said pedestal in the zone of said arc surface, and the composition surface of said buffer part and pedestal is when with the said hair side inclined plane to the outer tilt of said brushhead when being benchmark of planting.

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

Second mode of toothbrush of the present invention is; Brushhead is implanted has bristle; Planting of this brushhead is formed with a plurality of pores of planting on the hair side, and the said buffer part of circumference for being formed by the low resin of the material of hardness ratio pedestal of planting pore, in this toothbrush; Be formed with diameter along with planting portion's direction in the pore and the inclined plane of stenosis gradually at the circumference of the peristome side of planting pore of said pedestal, and be formed with said buffer part in the zone that comprises on the said inclined plane to said.

In second mode of toothbrush of the present invention, preferably, said inclined plane is the C face; Preferably, said C face is C0.1～0.8mm, preferably; Thickness on the said pedestal of said buffer part is 0.1～1.0mm; Preferably, said planting on the hair side, planting many bristle tuft bundles are formed and use flat flat wire one folding is the pieces that two ground plant.

The invention effect:

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

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

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

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

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

As another aspect of the present invention; Owing to plant the buffer part of pore circumference for forming 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 said plant pore in portion's direction and the inclined plane of stenosis gradually; Therefore can relax the stress that concentrates on the bristle base portion, prevent that trichatrophia is disconnected.In addition, the intensity of pedestal can be guaranteed, a usability and the enough mao intensity of planting can be kept.

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

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

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

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

Description of drawings

Fig. 1 is the vertical 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 vertical 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 to the part sectioned view of planting the toothbrush that pore describes under the state that plants 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 ones

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

Below, first mode of toothbrush of the present invention is described with accompanying drawing.

Fig. 1 is the diagrammatic sketch that is used to explain toothbrush 1 of the present invention, is the vertical 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 among Fig. 1.In addition, for ease of explanation, omitted the diagram of bristle, only diagram is implanted the pore of planting that bristle is arranged.

Like Fig. 1 and shown in Figure 2, toothbrush 1 has brushhead 2, the planting hair side 5, and plant the adjacent side of hair side 6 and plant between the hair side 5 and be arc surface 7 of the implantation bristle of this brushhead 2, and the radius of curvature R of arc surface 7 is about 0.5～0.7mm.

Brushhead 2 comprises: be formed with a plurality of pedestals of planting pore 4 20 that bottom tube-like is arranged; 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 is made up of buffer part 30.The depth D that the distance of planting pore 4 is planted hair side 5 is about 3.0～5.0mm, and aperture d is about 1.5～3.0mm.

Buffer part 30 engages with pedestal 20 in the boundary portion 32 in the zone of arc surface 7, and the composition surface 22 of pedestal 20 and buffer part 30 is be the inclined plane of benchmark to the lateral direction inclination of brushhead 2 to plant hair side 5.Thus, buffer part 30 is set as the inboard that its boundary portion 32 is positioned at the profile phase ratio of seeing with overlooking of brushhead 2.The angle of inclination on composition surface 22 does not limit especially, but by the inclined plane P on composition surface 22 be preferably 100～150 ° with planting the hair side 5 parallel formed angle θ of imaginary plane Q, particularly be preferably 115～135 °.

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

Under the projection state, the profile of the formed brushhead 2 of pedestal 20 outermost perimembranous and the edge portion of boundary portion 32 distance 1, promptly 6 distances of planting on the hair side direction to the outer peripheral edges of buffer part 30 are preferably 0.1～0.9mm from the side, particularly are preferably 0.2～0.5mm.During less than 0.1mm, then hinder the moulding of pedestal 20, when surpassing 0.9mm, then brushhead 2 becomes big, the operability variation of toothbrush 1.

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

As this soft resin; Can give an example 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 depth D and the aperture d of pore 4, the material of bristle etc. and is decided, and for example is preferably 0.1～1.0mm, particularly is preferably 0.2～0.8mm, more is preferably 0.3～0.7mm.If more than the 0.1mm, then can improve the cementability of buffer part 30 and pedestal 20, and can relax when scrubbing to the stress of the base portion of bristle and to suppress trichatrophia disconnected, if below the 1.0mm, then can guarantee to implant pore 4 bristle plant a mao intensity.

The material of bristle does not limit especially, can use the used known material of toothbrush.Material as bristle; Can give an example polyester monocase for example or be the polyester based resin, nylon monomer of principal component with the polyester or be that the nylon of principal component is polyolefin monomers such as resin, polypropylene or polyethylene or is olefin-based resin of principal component etc. with the polyolefin that wherein polyester based resin is comparatively preferred with nylon.Because polyester based resin is disconnected than the trichatrophia that its material of tool is easy to generate the base portion place, the effect that therefore buffer part 30 is set is comparatively remarkable expressively.As polyester based resin, the PET that can give an example, polybutene terephthalate (PBT) and PTT (PTT) etc., wherein PTT is more preferred.Because it is disconnected that PTT is easy to generate trichatrophia in polyester based resin, the effect that therefore buffer part 30 is set is comparatively remarkable expressively.

The thickness of bristle does not limit especially, for example is the scope of 6～11mil (i.e. 0.152～0.279mm, 1mil=1/1000inch here).In addition, the shape of cross section of bristle mainly is circular, but does not also limit this shape especially.For example, also has the bristle of triangle, square, hexagon or petal shape iso-cross-section shape, the bristle that perhaps they is combined.In addition, both can use the bristle global shape to be processed to the bristle of for example wavy, helical form or zigzag etc. in advance, also can use the bristle that they are combined.

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

Bristle is that a unit is implanted in the pore 4 with the pieces that constitutes by many usually, and 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) also can be made cheese, depression shape or concavo-convex stairstepping etc. except flat shape.

Below, the manufacturing approach of toothbrush 1 of the present invention is described.This manufacturing approach has following operation: molding procedure, and this molding procedure moulding pedestal 20 (one-shot forming) is provided with buffer part 30 (post forming) on resulting pedestal 20, obtain the brush holder with brushhead 2 and handle portion (not shown); And plant a mao operation, this is planted mao operation bristle is planted on the brushhead 2 of said brush holder.

One-shot forming is such operation: make time mould one to one that forms with pedestal 20 corresponding chambers, penetrate the resin (being sometimes referred to as resin one time) that constitutes pedestal 20, moulding pedestal 20 to said chamber.

Post forming then is 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 obtained is enclosed in the chamber of secondary mould; Penetrate the resin (being sometimes referred to as the secondary resin) that constitutes buffer part 30 to the secondary mould, buffer part 30 is set on pedestal 20.When being incorporated with pedestal 20 in the chamber, the space that between pedestal of being packed into 20 and chamber, forms of the chamber of secondary mould becomes and buffer part 30 corresponding shape.

The secondary mould has: form first composite die of planting hair side 5 one sides; And second composite die that brushhead 2 bottom surfaces 8 sides are fixing, first composite die and second composite die carry out chimeric with chain-dotted line O as PL (parting line).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 on the brushhead 2 of resulting brush holder in post forming the operation that plants bristle, makes toothbrush 1.Planting of bristle can be used known fur planting method, and such flat wire of for example can giving an example is planted a mao method: will be two by pieces one folding that many bristles constitute, and between it, clip anti-avulsion parts (flat wire), and this flat wire packed into plant pore 4 interior fixedly pieces.This flat wire can use known in the past flat wire, the flat flat wire of can give an example brass for example or aluminum.

Aperture that the size of flat wire and shape can be considered to plant pore 4 etc. is decided.In addition; The length of planting the flat wire in the pore 4 of packing into is not particularly limited; Preferably make and can keep pieces and when planting mao, can not make brush holder produce the length of splitting or whiten, for example, pack into the long axis length of direction of the flat wire of preferably making than plant pore 4 is grown 0.3～0.5mm.In addition, angle can freely be selected though flat wire is packed into, for fear of the generation of splitting or whitening, preferably makes the scope that length direction with respect to brush holder is 5～80 ° and particularly is preferably 15～30 °.In addition, the flat wire angle of packing into needn't be planted in the pore 4 all identically all, also can make and whenever plant pore 4 angle of packing into inequality.

As stated,,, therefore, can relax when scrubbing, suppress the disconnected generation of trichatrophia the stress of bristle base portion because the hole peripheral portion 42 of planting pore 4 is made up of buffer part 30 as one aspect of the present invention.In addition, the movable free degree of bristle increases when scrubbing, and bristle gets into the gap of waiting between tooth easily, improves cleaning power.In addition,, therefore, can bristle lengths be shortened, improve the operability of toothbrush 1 owing to make bristle flexibly movable through the movable free degree of bristle is increased.

As another aspect of the present invention, because pedestal 20 and the boundary portion 32 of buffer part 30 are positioned at the zone of arc surface 7, therefore, boundary portion 32 is difficult for contacting with tooth etc. when scrubbing, and 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 when the brush holder moulding, to produce burr, can prevent peeling off of caused pedestal 20 of Yin Maoci and buffer part 30 at boundary portion 32 places.

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

Because the composition surface 22 of the toothbrush 1 of the present invention's one mode is a lateral incline outside brushhead 2; Therefore; Even pedestal 20 receives the compressing of first composite die, composition surface 22 can not prevent to produce the gap between the arc surface 7 and first composite die easily to planting pore 4 tilt yet.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, guaranteed, therefore can be prevented the lack of fill (lacking the material injection) of secondary resin owing to fill the space (runner) of secondary resin.

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

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

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

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

In addition,

protuberance

124 and 232 also is formed with the protuberance of juts such as a plurality of for example taper shape, square taper, cylindric and flat column, also forms the rib of band shape etc. along the composition surface.

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

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

Then, use accompanying drawing that second mode of toothbrush of the present invention is described below.Fig. 5 is the figure that is used to explain toothbrush 301 of the present invention, and it is the vertical view that expression is located at the brushhead on the top of handle portion (not shown) of toothbrush 301, and Fig. 6 is the profile along II-II line among Fig. 5.In addition, for ease of explanation, omitted the diagram of bristle, only diagram is implanted the pore of planting of bristle.

Like Fig. 5 and shown in Figure 6, toothbrush 301 has brushhead 302, and this brushhead 302 is manyly planted pore 304 and constituted the hole peripheral portion 342 of planting pore 304 by the buffer part 330 that is located on the pedestal 320 planting to be formed with on the hair side 305.In the brushhead 302, plant hair side 305 and be adjacent and between the side 306 of bottom surface 308, be arc surface 307, the radius of curvature of arc surface 307 is about 0.5～0.7mm.The size of brushhead 302 does not limit especially, and its width W is about 7.0～12.0mm, and its thickness T is about 3.0～6.0mm.

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

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

In pedestal 320 plant pore 304 circumferences, be 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 this embodiment, inclined plane 322 is C faces, and this C face is preferably C0.1～0.8mm, particularly is preferably C0.1～0.5mm, more is preferably C0.2～0.4mm.During less than C0.1mm, prevent that then the disconnected effect of trichatrophia might be insufficient, when surpassing 0.8mm, the interval of pore 304 between mutually of planting that then might adjacent enlarges, and brushhead 302 becomes big, usability decline.

In this manual; So-called C face; The bight chamfering is carried out with 45 ° angle and the face that appears from separately face in the bight that is meant two faces of pair of orthogonal; When representing numerical value when ining succession with said C, the length of intersecting lens that is illustrated in two faces of the said quadrature of distance is carried out chamfering for the position of this numerical value (using the mm unit representation usually) with 45 ° angle.For example, when being expressed as C0.5mm, the bight (intersecting lens) that is illustrated in two faces that leave quadrature is carried out chamfering for the position of 0.5mm with 45 ° angle corner.

In addition, the outer peripheral edges of buffer part 330 are that boundary portion 332 is zones of arc surface 307.Thus, boundary portion 332 and the profile phase of the formed brushhead 302 of outermost perimembranous of pedestal 320 are than becoming the inboard of planting hair side 305 directions.

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

Buffer part 330 is formed at the zone that comprises on the inclined plane 322, constitute 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, particularly be preferably 0.3～0.8mm; More be preferably 0.4～0.7mm, be preferably 0.5～0.6mm especially.When 0.1mm is above; Then can improve the cementability of buffer part 330 and pedestal 320, and can relax when scrubbing that the stress of base portion is suppressed trichatrophia is disconnected, when 1.0mm is following; Then can guarantee the usability of toothbrush 301, and can guarantee to implant mao intensity of planting of bristle 310 in the pore 304.In addition, if in above-mentioned scope, constitute the lack of fill (lacking the material injection) of the resin of buffer part 330 in the time of then moulding can being prevented.

For the material and the hardness thereof of buffer part 330, identical with aforementioned buffer part 30, giving an example also of the soft resin that buffer part 330 is used is identical with giving an example of the used soft resin of aforementioned buffer part 30.

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

The material of flat wire 314, size and shape are identical with aforementioned flat wire 14, and its object lesson is also identical.In addition, as the preferred example of the angle of packing into of said flat wire 314, the identical example of the preferable angle of packing into aforementioned flat wire 14 of can giving an example.

Below, the manufacturing approach of toothbrush 301 of the present invention is described.This manufacturing approach has following operation: molding procedure, this molding procedure are moulding pedestal 320 (one-shot formings), and buffer part 330 (post forming) is set on resulting pedestal 320, obtain 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 on the brushhead 302 of said brush holder.

One-shot forming is such operation: make time mould one to one that forms with pedestal 320 corresponding chambers, penetrate the resin (being sometimes referred to as resin one time) that constitutes pedestal 320, moulding pedestal 320 to said chamber.

Post forming then is 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 obtained is enclosed in the chamber of secondary mould; Penetrate the resin (being sometimes referred to as the secondary resin) that constitutes buffer part 330 to the secondary mould, buffer part 330 is set on pedestal 320.When being incorporated with pedestal 320 in the chamber, the space that between pedestal of being packed into 320 and chamber, forms of the chamber of secondary mould becomes and buffer part 330 corresponding shape.

Planting a mao operation, is the operation that plants bristle 310 on the brushhead 302 of resulting brush holder in post forming, makes toothbrush 301.Planting of bristle 310 can be used the known mao device of planting, and for example available flat wire formula is planted a mao device.

Adopt the present invention,, therefore, can relax the stress that when scrubbing, produces by buffer part 330 at base portion 313 because hole peripheral portion 342 is made up of buffer part 330.Its result, it is disconnected to prevent that bristle 310 from producing trichatrophia.In addition; Because inclined plane 322 is C faces; Therefore, can not increase the depth D 1 of planting pore 304 and the thickness t of buffer part 330 made be enough to the thickness that prevents that trichatrophia is disconnected, and can the depth D of planting pore 304 2 in the pedestal 320 be made and to obtain 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,, thus, the pedestal 320 and the bonding area of buffer part 330 are enlarged, can improve the bonding force of pedestal 320 and buffer part 330, and further improve for mitigation to the stress of base portion 313 through the C face is made on inclined plane 322.

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

In above-mentioned embodiment; Though the inclined plane of pedestal hole peripheral portion is the 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 to determine in for example 20～70 ° of benchmark, preferred 30～60 ° scope to plant hair side.In addition, the inclined plane can for example be an arc surface also.But, preventing the viewpoint of the effect that trichatrophia is disconnected from raising, the inclined plane is preferably the C face, promptly is to be the face that benchmark forms with the 45 ° of chamferings in inclination angle to plant hair side.

In above-mentioned embodiment, planting pore is that the round-ended cylinder shape is arranged, but the shape of planting pore do not limit especially, for example also ellipse or polygon etc. of its cross section.

In above-mentioned embodiment; Plant hair through the flat wire formula and plant pieces, but for example following method also capable of using waits and plants pieces: the lower end of pieces is pressed into as the hot fusing method of fixing in the molten resin of planting mao portion and after the lower end to pieces adds the thermosetting molten mass, molten resin is injected die for molding and plant in the type of mao portion processing (In mold) method etc.

Embodiment:

Embodiment 1A～5A:

According to the specification of table 1A, made the toothbrush identical with toothbrush shown in Figure 11.A resin that constitutes pedestal uses PP, and the secondary resin that constitutes buffer part uses styrene series elastomer resin (hardness 60).20 bristles of PTT system (φ 0.2mm) are made pieces, are two with said pieces one folding and pack into 23 with flat wire and to plant (250shot/min) in the pore with feather planting machine (ZAHORANSKY corporate system).

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

Comparative example 1A:

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

Comparative example 2A:

The angle on composition surface is made to 90 °, boudary portion in the zone of planting hair side, in addition all the other make toothbrush with embodiment 1A identically.For the toothbrush of making, lack the difficulty that material injection, burr produce, peel off and plant mao intensity and estimate, the fruit of signing an undertaking is illustrated among the 1A.

Table 1A:

Lack the evaluation of material injection:

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

Metewand:

B: do not find out the form generation defective and the distortion of buffer part.

C:, find that defective appears in a part though do not find out the distortion that the form generation of buffer part is big.

D: find out the big distortion of form generation of buffer part.

Burr produces:

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

Metewand:

A: do not find out the generation burr fully.

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

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

D: find out in the zone more than 30% of boundary portion to produce burr.

The difficulty of peeling off:

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

Metewand:

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

B: at access times is more than 100 times, less than 200 times the time, has confirmed to peel off.

C: at access times is more than 50 times, less than 100 times the time, has confirmed to peel off.

D: at access times is during less than 50 times, has confirmed to peel off.

Plant a mao intensity:

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

Metewand:

More than the a:25N.

More than the b:20N, less than 25N.

More than the c:15N, less than 20N.

D: less than 15N.

Overall merit:

The result who lacks material injection, difficulty that burr produces, peels off and plant mao intensity is classified and made overall merit according to following metewand.

Metewand:

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

B: the evaluation that lacks the material injection is " b "; Burr generation, the difficulty of peeling off and the evaluation of planting mao intensity are " c "～" a ", and " c " is more than one, perhaps; The evaluation that lacks the 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 the 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, perhaps, and in the evaluation that lacks material injection, burr generation, the difficulty of peeling off and plant mao intensity one " d " being arranged.

D: in the evaluation that lacks material injection, burr generation, the difficulty of peeling off and plant mao intensity " d " more than two being arranged.

Shown in table 1A, used 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 ", being suitable for the property made and planting estimate in mao intensity functional all excellent in evaluation aspect the difficulty that lacks material injection, burr generation and peel off.

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

Judge thus: tilt with respect to planting hair side through making the composition surface, 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: can prevent that burr from producing, and therefore can suppress peeling off of buffer part owing to used toothbrush of the present invention.

Embodiment 1B～8B:

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

For each routine toothbrush of made, to durability, plant a mao intensity, brushhead intensity and usability and estimate, its result is illustrated among the 1B.

Comparative example 1B:

Except the face that is equivalent to inclined plane shown in Figure 5 322 is made to and plant the face of hair side almost parallel, tool is surplus makes toothbrush with embodiment 1B identically.

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

Evaluation of Durability:

What correspondence had been supposed the molar process denture scrubs plate (stainless steel), back and forth scrub with load 400g, stroke 40mm, 240rpm, has studied each routine toothbrush and has produced trichatrophia and scrub number of times when disconnected.Press commentary valency benchmark and this is scrubbed number of times classify, estimated durability.In addition, when back and forth scrubbing, be 50% the aqueous solution as scrubbing mass fraction that liquid used the toothpaste that the market sells.

Metewand:

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

B: it is disconnected to produce trichatrophia in time more than 100,000 times, less than 150,000 times.

C: it is disconnected to produce trichatrophia in time more than 50,000 times, less than 100,000 times.

D: it is disconnected less than 50,000 times the time, to produce trichatrophia.

Plant a mao intensity:

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

Metewand:

More than the a:25N.

More than the b:20N, less than 25N.

More than the c:15N, less than 20N.

D: less than 15N.

Brushhead intensity:

That has prepared the toothbrush that each is routine plants 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 the digital shock machine (DG-1 type, the smart mechanism of Toyo Co., Ltd. is done manufacturing), applies load from planting the hair side side with 0.5J, the absorption energy (J) when having measured the fracture of (n=10) brushhead.This measured value is pressed commentary valency benchmark classify, brushhead intensity is estimated.In addition, in the table measured value and evaluation result all are documented in the parantheses.

Metewand:

More than the a:0.3J.

More than the b:0.2J, less than 0.3J.

More than the c:0.1J, less than 0.2J.

D: less than 0.1J.

The evaluation of usability:

Usability is to scrub in the oral cavity to 10 testees, estimates through testee's sense organ.Specifically,, under the situation of " operability no problem ", be evaluated as 3 fens, under the situation of " feel that brushhead is big slightly, but operability no problem ", be evaluated as 2 fens, under the situation of " operability is poor ", be evaluated as 1 fen for intraoral operability.The average mark of the mark that will be obtained by this sensory evaluation is pressed commentary valency benchmark and is classified, and usability is estimated.In addition, in the table average mark and evaluation result all are documented in the parantheses.

Metewand:

More than a:2.5 divides.

More than b:2.0 divides, less than 2.5 minutes.

More than c:1.5 divides, less than 2.0 minutes.

D: less than 1.5 minutes.

Overall merit:

Be the basis with long duration test, the evaluation result of planting a mao intensity, brushhead intensity and usability (being generically and collectively referred to as assessment item), press commentary valency benchmark and classify, made overall merit.

Metewand:

A: long duration test, plant a mao intensity, brushhead intensity respectively be 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 respectively be evaluated as " b " or " a " and " a " is more than two; Being evaluated as of usability " c "; Perhaps; Long duration test, plant a mao intensity, brushhead intensity respectively be 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 respectively be evaluated as " c "～" a " and " c " is more than one, the evaluation of usability is " c "～" a ".

D: any in the assessment item is " d ".

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

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

Utilizability on the industry:

Adopt the present invention, a kind of like this toothbrush can be provided: the use amount of the elastomer resin that can suppress to be used to prevent that trichatrophia is disconnected, and can prevent peeling off of buffer part.In addition, a kind of like this toothbrush can be provided: can keep usability, plant a mao intensity, and can prevent that the trichatrophia of bristle is disconnected.

Claims

1. toothbrush; Brushhead is implanted has bristle; This brushhead plant bristle plant hair side and and this plant between the adjacent side of hair side to be arc surface, to be formed with a plurality of pores of planting on the hair side and the said buffer part of circumference for forming of planting pore by the low resin of the material of hardness ratio pedestal said planting; This toothbrush is characterised in that

Said buffer part engages with said pedestal in the zone of said arc surface,

The composition surface of said buffer part and pedestal is when with the said hair side inclined plane to the outer tilt of said brushhead when being benchmark of planting.

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

3. according to claim 1 or claim 2 toothbrush is characterized in that on the said composition surface, a certain side in said pedestal and said buffer part is formed with protuberance, and is formed with the recess chimeric with said protuberance the opposing party.

4. like each described toothbrush in the claim 1～3, it is characterized in that the thickness on the said pedestal of said buffer part is 0.1～1.0mm.

5. like each described toothbrush in the claim 1～4, it is characterized in that the distance planting on the hair side direction between the side of said brushhead and the outer peripheral edges of said buffer part is 0.1～0.9mm.

6. toothbrush, brushhead is implanted has bristle, and planting of this brushhead is formed with a plurality of pores of planting on the hair side, and the said buffer part of circumference for being formed by the low resin of the material of hardness ratio pedestal of planting pore, and this toothbrush is characterised in that,

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

Zone comprising on the said inclined plane is formed with said buffer part.

7. toothbrush as claimed in claim 6 is characterized in that, said inclined plane is the C face.

8. toothbrush as claimed in claim 7 is characterized in that, said C face is C0.1～0.8mm.

9. like each described toothbrush in the claim 6～8, it is characterized in that the thickness on the said pedestal of said buffer part is 0.1～1.0mm.

10. like each described toothbrush in the claim 6～9, it is characterized in that, said planting on the hair side, planting many bristle tuft bundles are formed and use flat flat wire one folding is the pieces that two ground plant.