CN102821648B

CN102821648B - Toothbrush

Info

Publication number: CN102821648B
Application number: CN201180014818.3A
Authority: CN
Inventors: 中山幸子; 蜂须贺良祐; 小林海之
Original assignee: Lion Corp
Current assignee: Lion Corp
Priority date: 2010-03-24
Filing date: 2011-03-18
Publication date: 2015-06-10
Anticipated expiration: 2031-03-18
Also published as: CN102821648A; KR20170116245A; WO2011118538A1; MY183865A; JP2011200296A; KR102031473B1; KR20130004299A; TW201143675A; TWI520698B; JP5530776B2

Abstract

The present invention aims at providing a toothbrush configured so that a bristle bundle is less likely to come out of implanting holes, the toothbrush can be easily operated in the oral cavity, and having sufficient strength. The toothbrush is provided with a substantially flat plate-like head section (10) having an implanting surface (10a) in which a large member of implanting holes (11) are provided. Bristle bundles (1b) are each folded into two, and a flat line sandwiched between the two folded portions of the bristle bundle (1b) is driven into each of the implanting holes (11) to implant the bristle bundle (1b) into the implanting hole (11). The head section has a thickness in the range of 2.0-4.0 mm, and the minimum distance (W) between outermost implanting holes (11a) in the widthwise direction of the head section and a corresponding edge (12) of the head section is in the range of 0.4-0.9 mm.

Description

Toothbrush

Technical field

The present invention relates to the improvement of toothbrush.

The application advocates the priority of on March 24th, 2010 in No. 2010-068132, the patent application of Japanese publication, and quotes its content.

Background technology

In general, toothbrush is fixed on by lenticular wire the planting in pore of brushhead being located at handle body in advance by the pieces of the bristle by nylon or polybutylene terephthalate (PBT) to create.Using lenticular wire by being two by pieces one folding of planting hair, being therefore difficult to extract from planting pore.Consider from the aspect of cost and formability, the material of brushhead widely uses polypropylene (PP).

But, easily oral cavity interior angle is fallen to make toothbrush, especially the inside tooth carry out brush and sweep, the thickness being implanted with the brushhead of pieces is preferably thinner.Such as, in patent document 1, in order to improve in intraoral operability, propose handle body and being made up of polyacetal resin, simultaneously brushhead is thinning is the toothbrush of 3 ~ 4mm.

Prior art document

Patent document

Patent document 1: Unexamined Patent 7-143914 publication

Summary of the invention

The technical problem that invention will solve

But the toothbrush that patent document 1 is recorded is abundant not in intraoral operability, produces brush sometimes and sweep residue.In addition, brushhead is thinning, and the folding strength of brushhead likely declines.In addition, along with the decline of intensity, the edge part of brushhead cracks or albefaction, causes bad order.

The present invention proposes in view of the above problems, its object is to provide that a kind of pieces is difficult to from planting that pore is extracted, operability is good and have the toothbrush of sufficient intensity in oral cavity.

The technological means of dealing with problems

1st mode of the present patent application relates to a kind of toothbrush, it has and arranges multiple brushhead being roughly tabular of planting pore planting hair side, pore is planted described in being two by pieces one folding of bristle, being embedded by the lenticular wire sandwiched between the pieces that is two at a folding, described pieces is planted and plants pore in described, the thickness of described brushhead is 2.0 ~ 4.0mm, and the outermost beeline of planting pore and edge of the width of described brushhead is 0.4 ~ 0.9mm.

2nd mode of the present patent application is, in the toothbrush of described 1st mode, and the toothbrush that described brushhead is made up of polybutylene terephthalate resin.

The effect of invention

The pieces of toothbrush of the present invention is difficult to extract from planting pore, and in the oral cavity of toothbrush, operability is good and have sufficient intensity, therefore, can prevent brushhead folding strength from declining and bad order.

Accompanying drawing explanation

Fig. 1 is the side view of the embodiment representing toothbrush of the present invention.

Fig. 2 is the top view of the brushhead of the toothbrush shown in Watch with magnifier diagram 1.

Detailed description of the invention

One embodiment of toothbrush of the present invention is described.

Fig. 1 and Fig. 2 illustrates the toothbrush of present embodiment.The toothbrush 1 of present embodiment has: the handle body 1a comprising the brushhead 10 and pieces 1b planted in pore 11 planted in brushhead 10.

The handle part 20 that handle body 1a holds when comprising brushhead 10, use and the neck 30 be located between brushhead 10 and handle part 20.

In the handle body 1a of present embodiment, brushhead 10, handle part 20 and neck 30 are made up of same resin.

As the resin forming handle body 1a, can use such as, polybutylene terephthalate resin (PBT), acrylic resin (PP), polyacetal resin (POM), a part for cyclohexanedimethanol's dimethyl ester be replaced the resin (PCTA) etc. obtained by M-phthalic acid.

In addition, as the resin forming handle body 1a, preferably have the rigidity of appropriateness and the resin of toughness concurrently, preferably the modulus of elasticity in static bending is more than 1900MPa and tensile failure strain rate is the resin of more than 80%.Here, " modulus of elasticity in static bending " take ISO178 as the value that benchmark measures, and " tensile failure strain rate " is with ISO527-1,2 values measured for benchmark.

The described modulus of elasticity in static bending is more than 1900MPa and described tensile failure strain rate is more than 80%, and the toughness of handle body 1a is enough high, even if brushhead 10 is thinning, also not easily splits, can prevent the plane of fracture shape from being acute angle for impact.

The upper limit of the described modulus of elasticity in static bending and described tensile failure strain rate has no particular limits, if normally used resin, the modulus of elasticity in static bending is below 5000MPa, and tensile failure strain rate is less than 500%.

From this viewpoint of condition easily meeting the above-mentioned modulus of elasticity in static bending and tensile failure strain rate, preferred polybutylene terephthalate resin.In addition, the resistance to chemical reagents of polybutylene terephthalate resin and heat resistance better.Therefore, even if the toothbrush 1 polybutylene terephthalate resin being used for handle body 1a uses also seldom deterioration for a long time, even if also not easily split by the fixing pieces 1b of lenticular wire brute force, quality is higher.

Polybutylene terephthalate resin is with terephthalic acids or dimethyl terephthalate (DMT) and 1,4 butanediols are raw material, the thermoplastic polyester manufactured by polycondensation reaction, exemplifies ジユラネ Star Network ス (name of product), ノバデユラ Application (name of product) of Mitsubishi Engineering-Plastics Inc., トレコ Application (name of product) etc. of Dong Li Inc. of precious reason Plastics Company.

Brushhead 10 is roughly flat part, is implanted with pieces 1b being located at multiple the planting in pore 11 of planting hair side 10a.In present embodiment, the hair side 10a that plants of brushhead 10 is roughly rectangle, and the two edges 12 of width are parallel to each other and edge 13 along the top side of the length direction of handle body 1a is curve-like.

The thickness T of brushhead 10 is 2.0 ~ 4.0mm, is preferably 2.5 ~ 3.5mm.When the thickness T of brushhead 10 is less than 2mm, brushhead folding strength is lower, therefore has the worry that brushhead 10 is lost when brushing teeth, and can not guarantee the degree of depth of planting pore 11 fully needed for lenticular wire maintenance pieces 1b.On the other hand, when the thickness T of brushhead 10 is more than 4mm, in oral cavity, operability is bad.

This distance W (below, is called " border width W " by the outermost beeline W planting pore 11a and edge 12 of width (direction vertical with length direction) in brushhead 10, brushhead 10.) be 0.4 ~ 0.9mm, be preferably 0.6 ~ 0.8mm.When the border width W of brushhead 10 is less than 0.4mm, brushhead folding strength is not enough, and the stress produced owing to planting hair can make the edge part of brushhead 10 be out of shape.When border width W is more than 0.9mm, relative to the thickness T of brushhead 10, border width W broadens, and when brushing last molar etc., brushhead 10 touches gum, buccal mucosa makes operability decline, and feeling of brushing teeth is bad.

In addition, in brushhead 10, the beeline at the edge 13 of planting pore 11b and tip side of the top side of the length direction of brushhead 10 is also preferably 0.4 ~ 0.9mm.When the beeline of planting the edge 13 of pore 11b and tip side is less than 0.4mm, brushhead folding strength may be not enough, and during more than 0.9mm, in oral cavity, operability may decline.

Handle part 20 is the bar-shaped parts with the length that user can hold.

In handle part 20, in order to make holding improve, a part or whole part soft resin can be covered.

As described soft resin, preferred hardness (JISK6253 hardness test, experimental condition JISA) is the soft resin of 5 ~ 100, and more preferably hardness is the soft resin of 20 ~ 60.The hardness of described soft resin is more than 5, has sufficient soft property, and holding property improves relatively.

As the instantiation of described soft resin, polyolefins thermoplastic elastomer, polystyrene-type thermoplastic elastomers, polyurethane-type thermoplastic's elastomer, polyester-type thermoplastic's elastomer, 1,2-polybutadiene analog thermoplastic elastomer, ethylene-vinyl acetate analog thermoplastic elastomer, polyvinyl chloride analog thermoplastic elastomer, natural rubber analog thermoplastic elastomer, fluorine analog thermoplastic elastomer, trans-polyisoprene analog thermoplastic elastomer etc. are exemplified.

When adopting polybutylene terephthalate resin as the resin forming handle body 1a, from the viewpoint of compatibility, preferably adopt polyester-type thermoplastic's elastomer as soft resin.As polyester-type thermoplastic's elastomer, such as, there are Ha イトレ Le (name of product) of Dong Li Dupont Kabushiki Kaisha or プリマロイ (name of product) etc. of Mitsubishi chemical Co., Ltd.

Neck 30 links the part between brushhead 10 and handle part 20.The width of neck 30 is narrower than the width of brushhead 10.Be narrower than the width of brushhead 10 by the width of neck 30, brushhead 10 is easily inserted in oral cavity.

Pieces 1b is made up of the bristle of doubling, makes pieces 1b be fixed on brushhead 10 by being planted in pore 11 by the lenticular wire between the bristle sandwiching this doubling.

As the material of described bristle, polyamide (example: nylon 6-12, nylon 6-10, nylon 12 etc.), polyester (example: PET, poly terephthalic acid dipropyl, polybutylene terephthalate etc.), polypropylene, elastomer, natural material etc. are exemplified.In addition, also can be the combination of these materials.

The shape of cross section of described bristle is not particularly limited, and has exemplified circle, triangle, quadrangle, hexagon, petal, circular arc etc.Also can be the combination of these shapes.

In addition, bristle can be processed into wavy, helical form or zigzag etc. in advance.

The external diameter of described bristle is preferably 3 ~ 15mil (namely, 0.076 ~ 0.381mm), is more preferably 5 ~ 10mil (that is, 0.127 ~ 0.254mm).

In addition, each bristle can be that except the high-quality green tea rounded portions on top except being usually formed in described bristle, being all the usual bristle of roughly same diameter, also can be that external diameter is along with taper bristle tapered to top.Also can be the bristle of these usual bristles and the mixing of taper bristle, it is different that correspondence respectively plants pore 11.Taper bristle enters better performances to close clearance, can realize soft sense of touch, is applicable to sweeping the brush of tooth neck and massaging.

As described taper bristle, such as, the taper bristle etc. of the such core sheath structure described in the taper bristle with sea island structure such described in the such taper bristle being formed with multiple sharp-pointed portion on 1 hair described in the taper bristle that the two ends as described in Unexamined Patent 6-141923 publication are processed as the taper bristle of taper, the such only one end described in JP 57-50220 publication is processed as taper, JP 2002-58838 publication, Unexamined Patent 9-322821 publication, JP 2001-178542 publication.

The length of described bristle is preferably 7 ~ 15mm, is more preferably 8 ~ 13mm.In addition, also can the length of described bristle all equal, also can be unequal.

The brush surface sweeping formed by the top of whole pieces 1b can be such as, relative to planting the parallel plane of hair side 10a; Also can be to for plant hair side 10a tilt plane; Also can be alongst relative to plant hair side 10a gradually away from or the curved surface, convex surface, concave surface or the wavy male and fomale(M&F) that move closer to.From the viewpoint of easily carrying out described brush and sweeping, preferably move closer to plane or the curved surface of the inclination of planting hair side 10a towards rear end from top.

The length of described lenticular wire preferably can firmly fix bristle, and brushhead 10 can not produce the length of slight crack and albefaction.Specifically, lenticular wire is preferably than planting pore 11 length 0.3 ~ 0.5mm.

The height of described lenticular wire is not particularly limited, and guarantees to plant a mao adaptability, preferably in the scope of 0.9 ~ 2.0mm in order to ensure embedment strength fully.In addition, based on same reason, the thickness of lenticular wire is preferably 0.20 ~ 0.25mm.

In addition, the embedding angle of described lenticular wire can suitably be selected, in order to avoid producing slight crack and albefaction, preferably in the scope of the length direction 5 ~ 80 ° relative to handle body 1a, more preferably in the scope of 15 ~ 30 °.The loading angle of described lenticular wire can all lenticular wires all the same, also can be different.

The material of described lenticular wire can use metal, plastics etc., but from the viewpoint of intensity, productivity and cost, is preferably metal, is more preferably brass or aluminium.

Be not easy to make lenticular wire to drop out from planting pore 11, the surface of described lenticular wire also can form groove or tiny concavo-convex.

In present embodiment, planting pore 11 for circular, is clathrate configuration at the hair side 10a that plants of brushhead 10.

For the shape of depth direction of planting pore 11, can be do not have vicissitudinous cylindrical shape for depth direction shape, also can be aperture along with the taper diminished downwards, also can be the shape forming jump at the middle part in hole.In addition, also can be the shape forming jump and taper respectively.In addition, the chamfer machining of about 0.3mm can be imposed to the bottom of planting pore 11.

The aperture of planting the opening portion of pore 11 is preferably 1.0 ~ 2.0mm (namely, area 0.75 ~ 3.1mm ²).By being implanted with pieces 1b in such aperture, can be formed the sense of touch in gum portion good, the toothbrush that the insertion sense of reality of the high-quality green tea in the gap that between cog portion etc. are tiny is higher.

In the toothbrush 1 be explained above, the thickness T of brushhead 10 at more than 2.0mm and border width W at more than 0.4mm, therefore, sufficient intensity can be guaranteed, thus can prevent brushhead folding strength decline or bad order.In addition, in toothbrush 1, the thickness T of brushhead 10 is below 4.0mm, border width W is below 0.9mm, therefore, brushhead 10 can be prevented intraoral contact, thus preferable operability in oral cavity.

In addition, the pieces 1b of toothbrush 1 is fixed on by lenticular wire and plants in pore 11, therefore, not easily drops out.

In addition, the present invention is not limited to above-mentioned embodiment.

Brushhead 10, handle part 20, neck 30 may not be same resin and form.

In addition, although brushhead 10 be preferably above-mentioned embodiment like that entirety be same thickness in described scope, a part for neck 30 side, also can be preferably the less than 1/3 thickening of brushhead 10 length.By making neck 30 side of brushhead 10 thickening, can be connected with neck 30 smoothly.

In addition, in toothbrush of the present invention, also can omit neck 30.Namely handle body also can be made up of brushhead 10 and handle part 20.

In addition, the hair side 10a that plants of brushhead 10 may not be rectangular shape, also can be such as, circular, oval etc.

Planting the shape of the opening portion of pore 11 than circular, also can be polygon or other shapes such as such as circle, triangle, quadrangle.In addition, all planting pore 11 can be identical opening portion shape, also can be the opening portion shape of combination more than 2.

The configuration pattern of planting pore 11 can be plover trellis, also can be the pattern of planting pore group that the end of the both end sides of the width in brushhead 10 forms the arc-shaped bent to the center side of brushhead 10.

Have arc-shaped as described above plant pore group when, pieces 1b is easily close to tooth neck.From the angle improving the brush of the flank of tooth and sweep true feeling, preferably plant to be longer than in the pieces 1b planting pore group of arc-shaped and plant in the described pieces 1b planting pore planted beyond pore group.In this case, the difference of average bristle length is preferably 0.3 ~ 2.0mm, is more preferably 0.5 ~ 1.5mm.

In the present invention, also can be pieces 1b from as arc-shaped, in this case, the pieces 1b of best arc-shaped be located at the end of the both end sides of the width of brushhead 10, and the pieces 1b of arc-shaped grows than other pieces 1b.

Embodiment

In following example, employ following resin.

Polybutylene terephthalate (PBT): ノバデユラ Application 5010 (name of product) of Mitsubishi Engineering-Plastics Inc.

A part for cyclohexanedimethanol's dimethyl ester is replaced the resin (PCTA) obtained by M-phthalic acid: Eastman Chemical BR203

Polypropylene (PP): Pu Ruiman Polymer Company J700GP

Polyacetals (POM): the HC490 of Asahi Chemical Industry's chemical company

In addition, the modulus of elasticity in static bending of the resin of use with ISO 178 for benchmark measures.Tensile failure strain rate measures for benchmark with ISO 527-1,2.Its result is as shown in table 1.

(embodiment 1 ~ 8, comparative example 1 ~ 3)

Adopt resin injection molding shown in table 1 to make handle body, the aperture of handle body being planted pore is 1.55mm, the distance of planting between pore is 0.725mm, and handle body has the thickness T shown in table 1, width L, the brushhead of border width W, handle part and neck.

Then, be two by pieces one folding of the bristle be made up of nylon (with hair: 8mil, length: 9.0mm, truncation), the part of its bending sandwiches lenticular wire (width: 1.3mm, length: 2.1mm, thickness: 0.25mm), insert be formed in brushhead plant pore, in order to plant pieces.Obtain toothbrush thus.

Intensity and outward appearance is kept to do following evaluation operability, brushhead folding strength, pieces in the oral cavity of each toothbrush obtained.Evaluation result is as shown in table 1.

(1) operability in oral cavity

The toothbrush of each embodiment and each comparative example, by 10 actual uses of trier, is given a mark according to following benchmark to the operability at intraoral toothbrush.Then, evaluated by the mean value counterpart transluminal operation of 10 people.In the higher oral cavity of mark, operability is better.

[fraction basis]

7 points: very good.

6 points: very well.

5 points: better.

4 points: general.

3 points: poor.

2 points: very poor.

1 point: non-constant.

[metewand]

◎: mean value more than 5.5 points

Zero: mean value more than 5.0 points and less than 5.5 points

△: mean value more than 4.0 points and less than 5.0 points

×: mean value is less than 4.0 points

(2) brushhead folding strength

By the bristle of toothbrush from the partial cut of planting pore and exposing, make brushhead to plant hair side side level and smooth.Then, being fixed on the izod impact testing machine of the machine-processed Zuo Suo Inc. of essence of Toyo Co., Ltd., being impacted from planting hair side side by weight, impact energy when mensuration brushhead is disrumpent feelings measures (measuring number of times 10), tries to achieve mean value.Then, evaluate according to following benchmark.

[metewand]

Zero: more than mean value 0.3J

△: more than mean value 0.15J and less than 0.3J

×: mean value is less than 0.15J

(3) pieces keeps intensity

Whole bristles in 1 hole are held on by specific purpose tool, pieces from planting the maximum tensile stress (N) (draw speed 20mm/ divides) (n=20) extracted pore, is evaluated by following benchmark by オ mono-トグラ Off (name of product) mensuration of employing Shimadzu Seisakusho Ltd..Pieces keep intensity higher pieces more difficult deviate from.

[metewand]

Zero: more than mean value 20N

△: more than mean value 10N and less than 20N

×: mean value is less than 10N

(4) outward appearance

The toothbrush of each making 10 each embodiments and each comparative example, according to following metewand, by the generation of the distortion of the edge part of visual assessment brushhead, crackle, albefaction and warpage.

[metewand]

Zero: the incidence of distortion slight crack albefaction warpage: 0%

△: the incidence of distortion slight crack albefaction warpage: less than 20%

×: the incidence of distortion slight crack albefaction warpage: more than 20%

[table 1]

The thickness T of brushhead be 2.0 ~ 4.0mm and border width W be the toothbrush of the embodiment 1 ~ 8 of 0.4 ~ 0.9mm oral cavity in operability good.Wherein, the resin of handle body is that the outward appearance of the toothbrush of the embodiment 1 ~ 5 of polybutylene terephthalate resin is good, has sufficient brushhead folding strength.In addition, the resin of handle body is that the toothbrush of embodiment 1 ~ 6 and 8 beyond the embodiment 7 of acrylic resin has high pieces and keeps intensity.

In contrast, the border width W of brushhead is lower less than the brushhead folding strength of the toothbrush of the comparative example 1 of 0.4mm, and outward appearance is not good.

In the oral cavity of the toothbrush of thickness T comparative example 3 more than 0.9 more than the toothbrush of the comparative example 2 of 4.0mm and the border width W of brushhead of brushhead, operability is poor.

Utilizability in industry

Not easily from planting that pore is deviate from, in oral cavity, operability is good and have the toothbrush of sufficient intensity to the invention provides a kind of pieces, therefore, industrially very useful.

Symbol description

1 toothbrush

1a handle body

1b pieces

10 brushhead

10a plants hair side

11,11a, 11b plant pore

12,13 edges

20 handle parts

30 necks

Claims

1. a toothbrush, it has and arranges multiple brushhead being roughly tabular of planting pore planting hair side, plants pore, described pieces is planted and plants pore in described described in being two by pieces one folding of bristle, being embedded by the lenticular wire sandwiched between the pieces that is two at a folding, the feature of described toothbrush is

Described brushhead is more than 1900MPa by the modulus of elasticity in static bending and the resin that tensile failure strain rate is more than 80% is formed, and be more than 0.15J below 0.3J by the folding strength that following assay method measures, the thickness of described brushhead is 2.0 ~ 4.0mm, the outermost beeline of planting pore and edge of the width of described brushhead is 0.4 ~ 0.9mm

Described assay method be by the bristle of described toothbrush from the described partial cut of planting pore and exposing, make described brushhead to plant hair side side level and smooth, be fixed in again on izod impact testing machine, impacted from described hair side side of planting by weight, measure described brushhead disrumpent feelings time impact energy, using this impact energy as folding strength.

2. toothbrush as claimed in claim 1, is characterized in that,

Described brushhead is made up of polybutylene terephthalate resin.