CN110267566A

CN110267566A - Toothbrush

Info

Publication number: CN110267566A
Application number: CN201880009098.3A
Authority: CN
Inventors: 野泽纱弥; 小林海之; 北原将嗣
Original assignee: Lion Corp
Current assignee: Lion Corp
Priority date: 2017-07-31
Filing date: 2018-07-24
Publication date: 2019-09-20
Anticipated expiration: 2038-07-24
Also published as: CN110267566B; KR20200034658A; JP2019025028A; TW201909790A; JP6983568B2; KR102625898B1; TWI763892B; WO2019026685A1

Abstract

The object of the present invention is to provide have high grip toothbrush to handle portion under the premise of not leading to increased costs.Handle portion (30) has maximum first bulge (41) of length of the width direction at the first position (P1) of long axis direction, in the smallest first narrowing portion (43) of the second position (P2) director's degree for leaning on rear end side than the first bulge, in maximum second bulge (42) of the third place (P3) director's degree for leaning on rear end side than the first narrowing portion, and in the smallest second narrowing portion (44) of the 4th position (P4) director's degree for leaning on rear end side than the second bulge.When the minimum length of the first narrowing portion to be set as PW2 and the maximum length of the second bulge is set as PW3, PW3 is 15mm or more and 20mm hereinafter, PW3/PW2 is 1.3 or more and 1.5 or less.When the thickness of first position to be set as PT1 and the thickness of the third place is set as PT3, PT3 is 15mm or more and 20mm hereinafter, PT3/PT1 is 1.7 or more and 2.5 or less.

Description

Toothbrush

Technical field

The present invention relates to toothbrushes.

The present invention is based on the Patent 2017-147972 CLAIM OF PRIORITYs on July 31st, 2017 to Japanese publication, and will be in it Appearance is incorporated herein.

Background technique

In the prior art, in order to reach in oral cavity to each corner cleaning, focus on it is intraoral operability and one As make plant hair portion densification.However, need clean method skilled in the case where carrying out oral cleaning with compact plant hair portion, And cleaning is time-consuming.For this purpose, developing the toothbrush with the brush head (wide head) for planting type of the hair portion through enlargement, but due to planting hair portion It is wide cut design, therefore bristle portion is difficult to suitably to reach cleaning this point of position and is denounced.

Patent Document 1 discloses the toothbrushes of following wide head specification: passing through the work above and below bristle type, arrangement mode Husband can brush simultaneously and sweep multiple cleaning positions, and have high cleaning.

Citation

Patent document

Patent document 1:JP special open 2016-209616 bulletin

Summary of the invention

(subject to be solved by the invention)

However, in the toothbrush of above-mentioned wide head specification existing like that, although spatter property is improved to a certain degree, The interference of pieces when abutting with cleaning position is big, therefore the handle portion held may shake and cause to hinder to stable cleaning Hinder.In order to improve gripping Discussing Convenience, the slip resistance of handle portion make it is grip be improved, such as also consider the table in handle portion The bending sections such as rubber are arranged in face.

But in the case, it may create the problem that and not only need using various kinds of resin, it is also necessary to dual-color forming Etc. making handle portion, therefore lead to increased costs.Such problems is not limited to wide head specification, in the brush head of compact specification It is likely to occur.

The present invention considers above such point and proposes, it is intended that providing under the premise of not leading to increased costs There is high grip toothbrush to handle portion.

(a technical solution to solve project)

According to the first form of the invention, provide a kind of toothbrush, have: brushhead is configured at the front end of long axis direction Side, and formed planting hair side implanting pieces；Brush neck is extended the rear end side in the brushhead；And handle portion, prolong The rear end side for being set to the brush neck is stretched, the handle portion includes the first bulge, is arranged to than the brush neck by rear end Side, under the main view from the vertical positive direction of the plant hair side, with the long axis direction and the positive direction In vertical width direction two sides symmetrically consecutive variations and expand；First narrowing portion is arranged to than first bulge By the rear end side, two sides symmetrically consecutive variations and constriction in the width direction；Second bulge is arranged to than institute The first narrowing portion is stated by the rear end side, in the width direction two sides symmetrically consecutive variations and expand；And second contracting Narrow portion is arranged to than second bulge by the rear end side, in the width direction two sides symmetrically consecutive variations And constriction, at the first position between the brush neck and first narrowing portion on the long axis direction, described first The length of the width direction of bulge is maximum, first bulge and second expansion on the long axis direction The length of the second place between portion, the width direction of first narrowing portion is minimum, on the long axis direction At the third place between first narrowing portion and second narrowing portion, the width direction of second bulge Length is maximum, and the second bulge described in the ratio on the long axis direction is at the 4th position of rear end side, second constriction The length of the width direction in portion is minimum, by the width direction of first narrowing portion of the second place When length is set as PW2 and the length of the width direction of second bulge at the third place is set as PW3, The PW3 is 15mm or more and 20mm hereinafter, PW3/PW2 is 1.3 or more and 1.5 hereinafter, by the institute at the first position It is described when stating the thickness of positive direction and being set as PT1 and the thickness of the positive direction at the third place is set as PT3 PT3 is 15mm or more and 20mm hereinafter, PT3/PT1 is 1.7 or more and 2.5 or less.

In addition, on the basis of the toothbrush involved in a form of aforementioned present invention, first bulge, described first Contour line under narrowing portion, second bulge and the respective main view of second narrowing portion by in the long axis External curve is formed each other for adjacent bulge or narrowing portion on direction.

In addition, the brush on the basis of toothbrush involved in a form of aforementioned present invention, at the first position The cross sectional shape of shank is the length of the width direction flat pattern bigger than the thickness of the positive direction, the third position It is roughly circular for setting the cross sectional shape of the handle portion at place.

In addition, the brush on the basis of toothbrush involved in a form of aforementioned present invention, at the first position The face side of shank and at least side in back side have groove portion.

In addition, the groove portion is formed as cyclic annular on the basis of the toothbrush involved in a form of aforementioned present invention.

In addition, the brush on the basis of toothbrush involved in a form of aforementioned present invention, in the width direction The maximum length on head is 13mm or more.

(invention effect)

In the present invention, can provide has high grip toothbrush to handle portion under the premise of not leading to increased costs.

Detailed description of the invention

Fig. 1 is the figure for indicating embodiments of the present invention, is the main view of toothbrush 1.

Fig. 2 is the side view of the toothbrush 1.

Fig. 3 is the rearview of the toothbrush 1.

Fig. 4 is the cross-sectional view for the handle portion 30 cut off at the P1 of first position.

Fig. 5 is the side view for being exaggerated the first position P1 in Fig. 2.

Fig. 6 is the cross-sectional view for the handle portion 30 cut off at the third place P3.

Fig. 7 is the side view for being exaggerated the rear end of the handle portion 30 comprising the 4th position P4.

Specific embodiment

Hereinafter, illustrating the embodiment of toothbrush of the invention referring to Figure 1 to Figure 7.

In the present embodiment, the example of the toothbrush of the wide head specification using the width of brushhead after enlargement is said It is bright.

In addition, the following embodiments and the accompanying drawings shows a form of the invention, the present invention is not limited, and can be in technology of the invention It is arbitrarily changed in the range of thought.In addition, in the following figures, it is for easy understanding each to constitute, make the ratio in each structure Ruler, quantity etc. are different from actual structure.

Fig. 1 is the main view of toothbrush 1.Fig. 2 is the side view of toothbrush 1.Fig. 3 is the rearview of toothbrush 1.

The toothbrush 1 of present embodiment has: brushhead 10 is configured at the front end side of long axis direction (before hereinafter referred merely to as End side), the pieces (not shown) of bristle is subjected to plant Mao Ercheng；Brush neck 20 is extended in the long axis side of brushhead 10 End side (hereinafter referred merely to as rear end side) backward；And handle portion 30 is (hereinafter, brushhead 10, brush neck 20 and handle portion 30 are closed Get up referred to as brush handlebody 2), it is extended in the rear end side of brush neck 20.

Brushhead 10 has in the side of thickness direction plants hair side 11.In addition, hereinafter, will be planted on above-mentioned thickness direction Face side of 11 side of hair side as positive direction, using the side opposite with hair side 11 is planted as back side, and will be with above-mentioned front Direction and the vertical direction of long axis direction are as width direction.In addition, in the following description, only by above-mentioned positive direction Thickness is known as thickness.Hair side 11 is being planted, multiple plant pores 12 are formed with.Pore 12 is being planted, implanting has the pieces of bristle (not scheme Show).

Brushhead 10 is the wide head specification of wide cut.The maximum width W1 of brushhead 10 is 13mm or more and 16mm or less.Brush The length on head 10 is not particularly limited, such as preferably 10mm or more and 33mm or less.The length of brushhead 10 is if above-mentioned More than lower limit value, then the area planted to pieces can be substantially ensured, if above-mentioned upper limit value hereinafter, then in intraoral behaviour It is further improved as property.

In multiple plant pores 12, brushhead 10 most positioned at front end side the front end for planting pore 12 and brushhead 10 away from From be set equal to brushhead 10 most positioned at rear end side plant pore 12 at a distance from the rear end of brushhead 10.In other words, By brushhead 10 when being most set as d at a distance from the front end of brushhead 10 positioned at the plants pore 12 of front end side, brushhead 10 and The boundary position of brush neck 20 be with brushhead 10 most positioned at rear end side 12 standoff distance d of plant pore as it is equidistant Deviate the position of rear end side.

The thickness of brushhead 10 can consider material of brush handlebody 2 etc. to determine, preferably 2.0mm or more and 6.0mm hereinafter, More preferably 3.0mm or more and 5.0mm or less.If the intensity of brushhead 10 is able into one more than above-mentioned lower limit value Step improves, if with a thickness of above-mentioned upper limit value hereinafter, if attainability not only to molar depths be improved, but also intraoral Operability is also further improved.

In order to touch brush neck 20 and lipped joint when 10 insert port of brushhead is intracavitary, the length of brush neck 20 is preferably 40mm or more and 70mm or less.

The minimum widith and minimum thickness of brush neck 20 are for example preferably 3.0mm or more and 6.0mm or less.If above-mentioned lower limit More than value, then the intensity of brush neck 20 is further improved, if above-mentioned upper limit value hereinafter, then lip is easy to close, in addition, extremely The attainability of molar is improved, and is also further improved in intraoral operability.

In addition, the boundary about above-mentioned brush neck 20 and handle portion 30, as described later, there are the boundary 31 of face side and back sides Boundary 32 (referring to Fig. 5), but the position of rear end side when design counts stating the length of brush neck 20 in uses the boundary of face side 31。

As shown in Fig. 2, this two sides of the face side and back side of brush neck 20 are extended roughly in parallel with hair side 11 is planted.Brush The face side of neck 20 has and has polarization center in face side under side view and be increasingly towards top (front with rear end side is gone to Side) circular shape curved profile 21.The back side of brush neck 20 have side view under overleaf side have polarization center and with Go to rear end side and be increasingly towards lower section (back side) circular shape curved profile 22.

Handle portion 30 is as shown in the main view of Fig. 1 and the backsight of Fig. 3, comprising: the length of width direction two sides symmetrically Consecutive variations and the first bulge 41 and the second bulge 42 expanded；The length of width direction is in two sides symmetrically consecutive variations And the first narrowing portion 43 and the second narrowing portion 44 of constriction；And it is configured at the through hole 46 near rear end.First bulge 41, First narrowing portion 43, the second bulge 42 and the second narrowing portion 44 are configured in order from front end side along long axis direction.In addition, The face side of handle portion 30 is formed with groove portion 45A, is formed with groove portion 45B in the back side of handle portion 30.

At the first position P1 of front end side on long axis direction, the length of the width direction of the first bulge 41 is maximum. First position P1 is the width direction of the first bulge 41 between the brush neck 20 and the first narrowing portion 43 on long axis direction The maximum position of length.It is configured on long axis direction than first position P1 at the second position P2 of rear end side, the first constriction The length of the width direction in portion 43 is minimum.Second position P2 is the first bulge 41 and the second bulge 42 on long axis direction Between the first narrowing portion 43 width direction the smallest position of length.It is configured at than second position P2 rearward on long axis direction At the third place P3 of end side, the length of the width direction of the second bulge 42 is maximum.The third place P3 is on long axis direction The first narrowing portion 43 and the second narrowing portion 44 between the second bulge 42 width direction the maximum position of length.In long axis It is configured on direction than the third place P3 at the 4th position P4 of rear end side, the length of the width direction of the second narrowing portion 44 is most It is small.4th position P4 be on long axis direction than the third place P3 at the rear end side width direction of the second narrowing portion 44 it is long Spend the smallest position.That is, what the curve or straight line of two edge that the width being formed from the third place P3 narrows were widened to width The position that curve or straight line or straight line of same size are changed.

Under first bulge 41, the first narrowing portion 43, the second bulge 42 and the respective main view of the second narrowing portion 44 Contour line is formed as the smooth curve mutually external with bulge adjacent on long axis direction or narrowing portion.

Specifically, having under 41 main view of the first bulge has the circular shape of the center of curvature in width direction center side Curved profile C1.There is the curved profile for the circular shape for having the center of curvature on the outside of width direction under first narrowing portion, 43 main view C2.Having under second bulge, 42 main view has the curved profile C3 of the circular shape of the center of curvature in width direction center side.The There is the curved profile C4 for the circular shape for having the center of curvature on the outside of width direction under two narrowing portions, 44 main view.Each curved profile C1~C4 and curved profile adjacent on long axis direction are external.

The length (width at the P1 of first position) of the width direction of first bulge 41 is being set as PW1, first is contracting The length (width at the P2 of the second position) of the width direction of narrow portion 43 is set as PW2, by the width direction of the second bulge 42 Length (width at the third place P3) is set as PW3 and by the length of the width direction of the second narrowing portion 44 (at the 4th position P4 Width) when being set as PW4, handle portion 30 meets relationship below (1), (2) respectively.

PW3 > PW1 > PW2 ... (1)

PW3 > PW4 > PW2 ... (2)

As the width PW1 at the P1 of first position, preferably 14mm or more and 17mm or less.

As the width PW2 at the P2 of the second position, preferably 11mm or more and 14mm or less.

As the width PW3 at the third place P3, preferably 15mm or more and 20mm or less.

As the width PW4 at the 4th position P4, preferably 12.5mm or more and 15.5mm or less.

The difference (PW1-PW2) of the width of first position P1 and second position P2 is preferably 2.5mm or more and 3.5mm or less.

The difference (PW3-PW2) of the width of the third place P3 and second position P2 is preferably 4mm or more and 5.5mm or less.

The difference (PW4-PW2) of the width of 4th position P4 and second position P2 is preferably 0.5mm or more and 1.5mm or less.

As 1.5 or less PW3/PW2, preferably 1.3 or more and.

The face side of handle portion 30 is as shown in Figure 2, comprising: the curved profile C11 of circular shape is configured at first position P1 has the center of curvature in face side under side view；The curved profile C12 of circular shape, is configured at second position P2, under side view Face side has the center of curvature；The curved profile C13 of circular shape, is configured at the third place P3, overleaf there is song in side under side view Rate center；The curved profile C14 of circular shape, is configured at the 4th position P4, has the center of curvature in face side under side view；And The curved profile C15 of circular shape, external with curved profile C12, C13 difference, overleaf there is the center of curvature in side under side view.It is bent Line profile C12~C15 and curved profile adjacent on long axis direction are external.

The back side of handle portion 30 is as shown in Figure 2, comprising: the curved profile C21 of circular shape is configured at first position P1, overleaf there is the center of curvature in side under side view；The curved profile C22 of circular shape, is configured at second position P2, under side view Face side has the center of curvature；The curved profile C23 of circular shape, is configured at the third place P3, has song in face side under side view Rate center；The curved profile C24 of circular shape, is configured at the 4th position P4, overleaf there is the center of curvature in side under side view；And The curved profile C25 of circular shape, it is external with curved profile C22, C23 difference, there is the center of curvature in face side under side view.It is bent Line profile C22~C25 and curved profile adjacent on long axis direction are external.

The thickness at the P1 of first position is set as PT1, the thickness at the P2 of the second position is set as to PT2, by the third place When thickness at P3 is set as PT3 and the thickness at the 4th position P4 is set as PT4, handle portion 30 meets relationship below respectively (3)、(4)。

PT3 > PT2 > PT1 ... (3)

PT3 > PT4 > PT1 ... (4)

As the thickness PT1 at the P1 of first position, preferably 6.5mm or more and 9mm or less.

As the thickness PT2 at the P2 of the second position, preferably 9mm or more and 11mm or less.

As the thickness PT3 at the third place P3, preferably 15mm or more and 20mm or less.

As the thickness PT4 at the 4th position P4, preferably 10mm or more and 13mm or less.

The difference (PT2-PT1) of the thickness of first position P1 and second position P2 is preferably 1.5mm or more and 3.0mm or less.

The difference (PT3-PT1) of the thickness of first position P1 and the third place P3 is preferably 5.5mm or more and 9mm or less.

The difference (PT4-PT1) of the thickness of first position P1 and the 4th position P4 is preferably 2.5mm or more and 4.5mm or less.

As 2.5 or less PT3/PT1, preferably 1.7 or more and.

In addition, as first position P1 at a distance from the third place P3, preferably 30mm or more and 60mm or less.First Lower than in the case where above-mentioned lower limit value at a distance from position P1 and the third place P3, the first position P1 and the when holding handle portion 30 The distance of three position P3 shortens, the minor details of the thumb abutted with the face side of second position P2 and with around the P2 of the second position side Become close to the index finger of abutting, the miscellaneous function when applying load to brushhead 10 when not only cleaning is possible to decline, Er Qiecong First position P1 and the third place P3 is distinguished in tactile becomes difficult.It is more than on above-mentioned at a distance from first position P1 and the third place P3 In the case where limit value, when holding handle portion 30, first position P1 is elongated at a distance from the third place P3, with first position P1's Finger placement department of the face side as the minor details of thumb, at the third place P3 in refer to and nameless maintained with what is circumferentially abutted It is difficult to become.

As shown in figure 4, the cross sectional shape of the handle portion 30 (the first bulge 41) at the P1 of first position is the length of width direction Greater than the flat pattern of thickness.In the face side of handle portion 30, it is provided with centered on the width direction center at first position And be formed as circular groove portion 45A under cricoid main view.In the back side of handle portion 30, the width that is provided at first position Be formed as circular groove portion 45B under cricoid main view centered on the center of direction.

In addition, as shown in figure 4, the face side of handle portion 30 have relative to width direction and overleaf there is the center of curvature in side Circular shape curved profile C31.There is groove portion 45A in the two sides of curved profile C31, height T1 is with the low of 0.5~1.5mm Scale formed.

Equally, the back side of handle portion 30, which has, has the song of the circular shape of the center of curvature in face side relative to width direction Line profile C32.In the two sides of curved profile C32 there is groove portion 45B, height T2 to be formed with the low scale of 0.5~1.5mm.

Fig. 5 is the side view for being exaggerated the first position P1 in Fig. 2.

Lean on the above-mentioned song of front end side under the brush neck 20 of face side and 31 side view of boundary of handle portion 30 than boundary 31 by being configured at Line profile 21 be configured at than have a common boundary 31 by rear end side above-mentioned curved profile C11 intersect in place of crest line formed.Boundary 31 Positive direction position, i.e., the position that curved profile C11 intersects with curved profile 21 is configured at than curved profile C11 and curve Face side is leaned in the position that profile C12 intersects.Therefore, it in the front end side of the first position P1 of face side, is formed with and first position The rear end side of P1 is compared to more steeply curved surface outstanding.

About the front end side of long axis direction, the height T3 of slot 45A is formed with the scale of 0.5~1.5mm.

About the rear end side of long axis direction, the height T4 of slot 45A is formed with the scale of 0.5~1.5mm.

Equally, by being configured at than having a common boundary 32 by front end side under 32 side view of boundary of the brush neck 20 of back side and handle portion 30 Above-mentioned curved profile 22 be configured at than have a common boundary 32 by rear end side above-mentioned curved profile C21 intersect in place of crest line shape At.The position of the positive direction of boundary 32, i.e., the position that curved profile C21 intersects with curved profile 22, which is configured at, compares curved profile The position backrest surface side that C21 intersects with curved profile C22.Therefore, the overleaf front end side of the first position P1 of side, be formed with The rear end side of first position P1 is compared to more steeply curved surface outstanding.

About the front end side of long axis direction, the height T5 of slot 45B is formed with the scale of 0.5~1.5mm.

About the rear end side of long axis direction, the height T6 of slot 45B is formed with the scale of 0.5~1.5mm.

As shown in fig. 6, the cross sectional shape of the handle portion 30 at the third place P3 is roughly circular.As the brush at the third place P3 The maximum gauge of shank 30, preferably 15mm or more and 20mm or less.It is lower than above-mentioned lower limit value in the maximum gauge of handle portion 30 In the case where, with centre of the palm holding mode (palm grip) hold the periphery the third place P3 when, hold area it is small, middle finger and The third finger is unable to fully abut, and becomes easy cunning, grip to be possible to decline.It is higher than the above-mentioned upper limit in the maximum gauge of handle portion 30 In the case where value, when holding the periphery the third place P3 with centre of the palm holding mode, perimeter becomes larger, it becomes difficult to hold.

As shown in fig. 7, being formed with the through hole 46 penetrated through on positive direction near the rear end of handle portion 30.In addition, such as Shown in Fig. 1 and Fig. 7, in the face side of handle portion 30, configured with the groove portion 47 extended from through hole 46 towards front end side.About slot Portion 47, as an example, depth is formed as 1mm or so in the cross sectional shape of semicircle.

Equally, in the back side of handle portion 30, from through hole 46 to the 4th position P4, configured with the slot extended towards front end side Portion 49.About groove portion 49, as an example, depth is formed as 1mm or so in the cross sectional shape of semicircle.

The length of brush handlebody 2 is not particularly limited, such as is set as 100~200mm.Brush handlebody 2 is integrally molded so as on the whole Strip, e.g. using resin as material and as obtained from injection molding.About the resin for constituting brush handlebody 2, as one Example, enumerating bending elastic modulus (JIS7171) is 1000MPa or more and 2200MPa resin below, such as enumerates polypropylene tree Rouge (PP), polystyrene resin (PS), gathers to stupid naphthalate resin (PET), gathers Fypro resin (POM) Butylene terephthalate resin (PBT), acrylonitrile butadiene styrene resin (ABS), polyarylate resin, polycarbonate resin Rouge, resin acrylonitrile styrene resin (AS) etc..In these resins, if from the aspect of cost, preferably as the poly- of resins for universal use Allyl resin.

Pieces is will be made of the binding of multiple bristles.Length (staple length) energy until the front end of pieces is played from plant hair side 11 Hair rigidity that pieces is pursued etc. is considered to determine, such as is set as 6~14mm.Whole pieces both can have identical staple length, Also it can have staple length different from each other.

The thickness (pieces diameter) of pieces can consider hair rigidity that pieces is pursued etc. to determine, such as be set as 1~3mm.Entirely The pieces in portion both can have identical pieces diameter, it is possible to have pieces diameter different from each other.

As constituting the bristle of pieces, for example, enumerate with go to high-quality green tea and the gradually smaller high-quality green tea of diameter through sharpening Bristle (cone cell hair), from roughly the same bristle (broad wool) of diameter etc. of planting hair side 11 towards high-quality green tea.As broad wool, high-quality green tea is enumerated The broad wool or high-quality green tea for being set as the plane substantially parallel with hair side 11 is planted bend to hemispherical broad wool.

About the material of hair, such as enumerates the polyamide such as 6-12 nylon (6-12NY), 6-10 nylon (6-10NY), is poly- to stupid Naphthalate (PET), polybutylene terephthalate (PBT), polypropylene terephthalate (PTT), poly- naphthalene two The polyolefin such as the polyester such as formic acid glycol ester (PEN), polybutylene naphthalate (PBN), polypropylene (PP), polyolefin elasticity Elastomer resins such as body, styrene series elastomer etc..About these resin materials, wherein a kind can be used alone, or by 2 kinds with On be applied in combination.In addition, enumerating the polyester bristle with multiple cored structure as bristle, which has core With at least 1 layer or more of the sheath portion in the outside for being set to the core.

The cross-sectional shape of bristle is not particularly limited, can be set to the circles such as circular, oval, polygon, star, Cloverleaf pattern, bunge bedstraw herb shape etc..The cross sectional shape of whole bristles both may be the same or different.

The thickness of bristle can consider material etc. to determine, in the case where cross section is circular situation, such as be set as 6~9mil (1mil=1/1000inch=0.025mm).Additionally, it is also contemplated that use feeling, brush sweep sense, cleaning effect, durability etc., it will More different bristles of thickness are used in any combination.

Brush handlebody 2 in the toothbrush 1 of above-mentioned composition is for example formed by injection molding, the injection molding utilize have with The mold in the space (cavity) of the corresponding shape of brush handlebody 2 and size.The cast gate for projecting the resin melted in mold is for example It is configured at the rear end of brush handlebody 2.The molten resin projected from cast gate is filled in the cavity of mold, takes out after cooling from mold, To complete to manufacture.

In brush handlebody 2, for the purpose of texture, the raising of aesthetic appearance, construction of feeling of high class etc., sometimes also by pearl pigment etc. Gloss material and resin be mixed rub cooperated after for injection molding.Resin comprising this gloss material flows in mold When, gloss material orientation, therefore especially in the brushhead of flow end 10, compared with the case where not using gloss material, outside In sight, jet stream (jetting), current mark, bonding wire become easy eye-catching.

In the brush handlebody 2 of present embodiment, through hole 46 is configured on the position nearest from cast gate 50, therefore pass through The mold of the shaft-like of through hole 46 is formed to control the flowing of the molten resin projected from cast gate 50, can control speed and flow path Size.Therefore, jet stream, current mark are not easy to become eye-catching in appearance.In turn, by being configured from through hole 46 to the 4th position P4 The groove portion 47,49 extended towards front end side collaborates the bonding wire occurred and groove portion after molten resin is shunted by through hole 46 again 47, it 49 is overlapped, therefore is not easy to become eye-catching in appearance.

Next, effect when for handle portion 30 with centre of the palm holding mode to hold above-mentioned toothbrush 1 is illustrated.

(first position P1)

The face side of the first position P1 of handle portion 30 becomes the finger placement department of 20 side of brush neck, is supported by the minor details of thumb It connects.The back side of first position P1 is abutted by the middle section of index finger.Handle portion 30 is on the P1 of first position with from front as a result, The mode of side and back side clamping is kept.At this point, the face side in first position P1 is configured with groove portion 45A, at first The back side of P1 is set configured with groove portion 45B, therefore finger placement department can be made to make clear from tactile.In addition, due to groove portion 45A, 45B is formed as cyclic annular with circle, therefore comprising width direction and long axis direction and in the face substantially parallel with hair side 11 is planted Movement in, finger it is mobile when it is also difficult to slide.

In addition, the section at the first position P1 of handle portion 30 is flat pattern, therefore handle portion 30 will be in first position It is abutted with wider area with the index finger of the thumb of face side and back side at P1, force is easy, and is able to achieve stable holding. So the power for being applied to handle portion 30 at the first position P1 close from brushhead 10 becomes prone to be transferred to brushhead 10, behaviour It is improved as property, plant hair side can be made to touch tooth well.

(second position P2)

The brush neck that first position P1 and the third place P3 when second position P2 is as to grip handle portion 30 are distinguished The assisted parts of 20 side of portion works.When handle portion 30 is kept with centre of the palm holding mode, the minor details and second of thumb The face side for setting P2 abuts, and index finger abuts with the peripheral direction of second position P2, thus with from face side at the P1 of first position And back side clamping mode kept, can secondarily be kept at the third place P3 with the palm of the hand, it is middle finger and it is unknown Finger gripping lives the middle section of the handle portion 30 kept.The first narrowing portion 43, therefore energy are configured under main view at the P2 of the second position Index finger is set to be easy to abut with circumferential.In addition, due to can be from touching when being in one's hands into handle portion 30 configured with the first narrowing portion 43 The difference of the shape of first position P1 and the third place P3 is identified in feel, moreover it is possible to be put into guiding with nature and easily hold It holds.

(the third place P3)

The third place P3 is configured with maximum second bulge 42 of width direction, works as stabilizers are held.With the centre of the palm When holding mode grip handle portion 30, the palm of the hand, middle finger and the third finger are abutted with the peripheral direction of the third place P3.Handle portion 30 Cross sectional shape at the third place P3 be it is roughly circular, in addition, the maximum length PW3 and maximum gauge PT3 of width direction It is the largest compared with other positions P1, P2, P4, therefore can be put among the hand of gripping and carry out stable holding.

(the 4th position P4)

When with centre of the palm holding mode grip handle portion 30, region until the rear end comprising the 4th position P4 especially as Assisted parts when with the palm of the hand, middle finger and nameless holding the third place P3 works.With centre of the palm holding mode grip handle When portion 30, the peripheral direction of tetra- position P4 of moon Qiu Yu of nameless, little finger of toe and the palm of the hand is abutted.Maximum at 4th position P4 Width PW4 and thickness PT4 is less than maximum width PW3 and thickness PT3 at the third place P3, therefore about shorter than middle finger Nameless and little finger of toe, also can steadily abut with the peripheral direction of the 4th position P4.

The length of width direction at above-mentioned handle portion 30, the position P4 of first position P1~the 4th meets above-mentioned pass respectively Be (1), (2), therefore by make face side thumb and back side index finger in the state of difficult to slide with wider face While product is abutted with the finger placement department at the P1 of first position, in the second expansion of the third place P3 formed with maximum gauge Portion 42 abuts the palm of the hand, middle finger and the third finger with peripheral direction, carries out stable holding so as to be put among the hand of gripping. In addition, maximum width PW1 and second bulge 42 of the minimum widith PW2 of the first narrowing portion 43 less than the first bulge 41 Maximum width PW3, therefore can be complementary by the middle section of the handle portion 30 kept with first position P1 and the third place P3 Ground is kept, and based on stable gripping, operability when cleaning is improved.In turn, including comprising the second narrowing portion 44 The minimum widith PW4 of rear end is greater than the minimum widith PW2 of the first narrowing portion 43, therefore can assist well from rear end side the The holding of two bulges 42 can help to grip further stabilisation.By making 1.3 or more PW3/PW2 above-mentioned And 1.5 hereinafter, said effect will be obtained further.

In addition, the thickness at the position P4 of first position P1~the 4th meets above-mentioned relation respectively in above-mentioned handle portion 30 (3), (4), the thickness for becoming the first position P1 of finger placement department is set to most thin, therefore can hold from face side and back side Easily and strongly clamp first position P1.So the power for being applied to handle portion 30 at the position close from brushhead 10 becomes It is easy to be transferred to brushhead 10, operability is improved, and plant hair side can be made to touch tooth well.In addition, first position P1 Thickness is thin, therefore between brush neck 20 and the boundary 31,32 and first position P1 of handle portion 30, forms steeply song outstanding Face.So it is chimeric to the curved surface in rear end side with the thumb and index finger that finger placement department abuts by making, gripping can be inhibited Handle portion 30 is rocked on long axis direction.By making PT3/PT1 1.7 or more and 2.5 above-mentioned hereinafter, to further obtain Said effect.

In addition, in above-mentioned handle portion 30, the curved profile of the curved profile C1 of the first bulge 41, the first narrowing portion 43 The curved profile C4 of C2, the curved profile C3 of the second bulge 42 and the second narrowing portion 44 and song adjacent on long axis direction Line profile is external, curved profile C11, curved profile C12, curved profile C13, curved profile C14 and the curve wheel of face side Wide C15 and curved profile adjacent on long axis direction are external, curved profile C21, the curved profile C22, curve wheel of back side Wide C23, curved profile C24 and curved profile C25 and curved profile adjacent on long axis direction are external, so that each profile is flat It is connected slidingly.So about above-mentioned handle portion 30, moreover it is possible to cope with various holding modes, be able to achieve operability and versatility is tall and erect Toothbrush 1 more.

In this way, the toothbrush 1 about present embodiment will not by suitably setting the shape and size of handle portion 30 It is in the presence of leading to increased costs using bending section etc., can obtains that there is handle portion 30 behaviour when high grip and cleaning The high toothbrush 1 of the property made.Especially in the present embodiment, the composition of the brushhead 10 based on the wide head specification with wide cut, even if When bristle portion is abutted with cleaning position, the handle portion of pieces interfered greatly to hold shakes, is in addition difficult to suitably reach clearly In the case where clean position, it may have fit into hand, with high grip handle portion 30, therefore good operability and can make to brush Tooth is touched in hair portion well.

Although illustrating preferred embodiment according to the present invention above by reference to attached drawing, the present invention is not restricted to these Example, this is self-evident.The only an example such as all shapes of each component parts shown in above-mentioned example, combination, is not taking off It can be made various changes according to design requirement etc. from the range of purport of the invention.

For example, being set although instantiating this two sides in the face side and back side of first position P1 in the above-described embodiment The composition of groove portion 45A, 45B is set, but is also configured to only be arranged in face side or back side.

In addition, being not limited to although instantiating the composition of the brushhead 10 using wide head specification in the above-described embodiment Wide head specification also can be using the present invention even the usually brushhead of type or compact specification.

Industrial applicibility

Present invention can apply to toothbrushes.

(label declaration)

1 ... toothbrush, 2 ... brush handlebodies, 10 ... brushheads, 11 ... plant hair sides, 20 ... brush necks, 30 ... handle portions, and 41 ... the One bulge, 42 ... second bulges, 43 ... first narrowing portions, 44 ... second narrowing portions, 45A, 45B ... groove portion, P1 ... first Position, the second position P2 ..., P3 ... the third place, the 4th position P4 ....

Claims

1. a kind of toothbrush, which is characterized in that have:

Brushhead is configured at the front end side of long axis direction, and forms planting hair side implanting pieces；

Brush neck is extended the rear end side in the brushhead；And

Handle portion is extended in the rear end side of the brush neck,

The handle portion includes

First bulge is arranged to than the brush neck by rear end side, from the positive direction vertical with the plant hair side Main view under, in the width direction vertical with the long axis direction and the positive direction two sides symmetrically consecutive variations and Expansion；

First narrowing portion is arranged to than first bulge by the rear end side, and two sides are symmetrical in the width direction Ground consecutive variations and constriction；

Second bulge is arranged to than first narrowing portion by the rear end side, and two sides are symmetrical in the width direction Ground consecutive variations and expand；And

Second narrowing portion is arranged to than second bulge by the rear end side, and two sides are symmetrical in the width direction Ground consecutive variations and constriction,

At first position between the brush neck and first narrowing portion on the long axis direction, first expansion The length of the width direction in portion is maximum,

The second place between first bulge and second bulge on the long axis direction, described first The length of the width direction of narrowing portion is minimum,

At the third place between first narrowing portion and second narrowing portion on the long axis direction, described second The length of the width direction of bulge is maximum,

Second bulge described in ratio on the long axis direction is at the 4th position of rear end side, the institute of second narrowing portion The length for stating width direction is minimum,

The length of the width direction of first narrowing portion of the second place is being set as PW2 and by described When the length of the width direction of second bulge at three positions is set as PW3,

The PW3 be 15mm or more and 20mm hereinafter,

PW3/PW2 be 1.3 or more and 1.5 hereinafter,

By the thickness of the positive direction at the first position be set as PT1 and by the third place it is described just When the thickness in face direction is set as PT3,

The PT3 be 15mm or more and 20mm hereinafter,

PT3/PT1 is 1.7 or more and 2.5 or less.

2. toothbrush according to claim 1, which is characterized in that

First bulge, first narrowing portion, second bulge and second narrowing portion are respective described Contour line under main view is by external curve is formed each other with bulge or narrowing portion adjacent on the long axis direction.

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

The cross sectional shape of the handle portion at the first position is the length of the width direction than the positive direction The big flat pattern of thickness,

The cross sectional shape of the handle portion at the third place is roughly circular.

4. toothbrush according to any one of claim 1 to 3, which is characterized in that

The face side of the handle portion at the first position and at least side in back side have groove portion.

5. toothbrush according to claim 4, which is characterized in that

The groove portion is formed as cyclic annular.

6. toothbrush according to any one of claim 1 to 5, which is characterized in that

The maximum length of the brushhead in the width direction is 13mm or more.