CN106102514A

CN106102514A - Toothbrush shank body, toothbrush and the manufacture method of toothbrush shank body

Info

Publication number: CN106102514A
Application number: CN201580013085.XA
Authority: CN
Inventors: 奥田靖
Original assignee: Lion Corp
Current assignee: Lion Corp
Priority date: 2014-03-14
Filing date: 2015-03-13
Publication date: 2016-11-09
Also published as: JPWO2015137487A1; KR20160134643A; WO2015137487A1

Abstract

The toothbrush shank body (2) of the present invention is formed as strip and possesses shank (21), the extended cervical region in described shank (21) (17) and be arranged at the head (11) on top of described cervical region (17), toothbrush shank body (2) possesses: first component (10), and this first component (10) is provided with described head (11) and the extended portion (12) extended from described head (11)；And second component (20), this second component (20) forms described shank (21) and extends along its length, and it is formed with the hollow bulb (4) at side's opening, a part for described extended portion (12) is inserted in described hollow bulb (4), in described hollow bulb (4), between described first component (10) and described second component (20), it is provided with elastic resin.

Description

Toothbrush shank body, toothbrush and the manufacture method of toothbrush shank body

Technical field

The present invention relates to toothbrush shank body, toothbrush and the manufacture method of toothbrush shank body.

The application based on March 14th, 2014 at the Patent 2014-051551 of Japanese publication and CLAIM OF PRIORITY, in it Appearance is incorporated herein.

Background technology

Commonly known as toothbrush, possess toothbrush shank body and bristle tuft, this toothbrush shank body possesses shank, extended In the cervical region of described shank and be arranged at the head on top of described cervical region, bristle tuft is implanted and is arranged at described head.At tooth In brush shank body, usual cervical region is relative to shank undergauge.

In order to be easier to wipe across the dorsal part etc. of molar, nipper, the raising of operability intraoral to toothbrush demand.As carrying The high toothbrush of intraoral operability, it is known to make head diminish or make head thinning or make the toothbrush that cervical region is thinner.

Additionally, it is known that a kind of toothbrush, elastic resin cover shank, prevent finger slippage, it is achieved the raising of operability.

Usually, toothbrush shank body is made up of polyolefin such as polypropylene (PP).In the toothbrush shank body of PP, if making head Portion diminishes or makes head thinning, or makes cervical region thinner, and the most in use head, cervical region become to be easily damaged.It addition, passing through When flat wire type plants hair to implant bristle tuft, head becomes to be easily damaged.

In order to tackle these problems, it is proposed that a kind of toothbrush (such as patent documentation 1), contour by polyacetal resin (POM) The resin formation toothbrush shank body of intensity (more than bendability modulus 2000MPa).

In the toothbrush of patent documentation 1, although mechanical strength, but the deflection of cervical region is less, therefore cannot be with suitable When toothbrushing force wipe across cleaning object position.

For this problem, Patent Document 2 discloses a kind of toothbrush, make the cross section profile of cervical region from head towards shank And change in particular shapes, periodically limit the flexure direction of cervical region such that it is able to make bristle tuft and cleaning object position Suitably abut, be cleaned with suitable toothbrushing force.

Prior art literature

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 7-143914 publication

Patent documentation 2: Japanese Unexamined Patent Publication 2013-118944 publication

The problem that invention is to be solved

But, for toothbrush, it is desirable to make toothbrushing force more appropriate, it is possible to wipe across more well.

Summary of the invention

Therefore, it is an object of the invention to provide a kind of in use can with more appropriate toothbrushing force wipe across cleaning right Toothbrush shank body, toothbrush and the manufacture method of toothbrush shank body as position.

For solving the means of problem

According to the result of present inventor's further investigation, find by possessing the first component of head and possess shank the Elastic resin is set between two parts, thus obtains the toothbrush shank body of the flexure excellence of cervical region, and complete the present invention.

That is, the present invention has following manner.

[1] a kind of toothbrush shank body, be formed as strip and possess shank, the extended cervical region in described shank, with And it being arranged at the head on the top of described cervical region, it possesses: first component, this first component is provided with described head and from described The extended portion that head extends；And second component, this second component forms described shank, and is formed and extends along its length And the hollow bulb surrounded in the wall portion of side's opening, a part for described extended portion is inserted in described hollow bulb, in described In sky portion, between described first component and described second component, it is provided with elastic resin.

[2] according to toothbrush shank body described in [1], wherein, arrange in described extended portion and oriented intersect with length direction The first protuberance that direction is prominent, the top of described first protuberance contacts with the inner surface in the described wall portion surrounding described hollow bulb.

[3] according to toothbrush shank body described in [1] or [2], wherein, arrange in described extended portion oriented with length direction phase The second protuberance that the direction handed over is prominent, the described wall portion of the described second protuberance described hollow bulb of through encirclement.

[4] according to the toothbrush shank body according to any one of [1]～[3], wherein, it is formed in the end of described extended portion Threeth protuberance prominent to extended direction, is formed with the recess corresponding with described 3rd protuberance at described second component.

[5] a kind of toothbrush, it has: the toothbrush shank body according to any one of [1]～[4] and implant the brush of described head Pieces.

[6] manufacture method of a kind of toothbrush shank body according to any one of [1]～[4], has: by described extended portion A part inserts the first operation of described hollow bulb；And the described first component in described hollow bulb and described second component it Between fill the second operation of elastic resin.

[7] according to the manufacture method of the toothbrush shank body described in [6], wherein, in described second operation, described first While filling elastic resin between parts and described second component, form the covering part of the part covering shank.

Invention effect

In accordance with the invention it is possible to toothbrush shank body, toothbrush and toothbrush that when providing a kind of use, the flexure of cervical region is excellent By the manufacture method of shank body.

Accompanying drawing explanation

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

Fig. 2 is the sectional view that will obtain after the toothbrush shank body cutting in the longitudinal direction of the embodiment of Fig. 1.

Fig. 3 is the sectional view that will obtain after the first component cutting in the longitudinal direction of the embodiment of Fig. 1.

Fig. 4 is the sectional view that will obtain after the second component cutting in the longitudinal direction of the embodiment of Fig. 1.

Fig. 5 is by an example of the first component of the embodiment of Fig. 1 and the bond sites of second component in the longitudinal direction The partial sectional view obtained after cutting.

Fig. 6 A is the A-A ' sectional view of the embodiment of Fig. 1.

Fig. 6 B is the B-B ' sectional view of the embodiment of Fig. 1.

Fig. 6 C is the C-C ' sectional view of the embodiment of Fig. 1.

Fig. 6 D is the D-D ' sectional view of the embodiment of Fig. 1.

Fig. 6 E is the E-E ' sectional view of the embodiment of Fig. 1.

Fig. 6 F is the F-F ' sectional view of the embodiment of Fig. 1.

Fig. 6 G is the G-G ' sectional view of the embodiment of Fig. 1.

H-H ' the sectional view of the embodiment of Fig. 6 H Fig. 1.

Fig. 7 is at length direction by another example of the first component of the embodiment of Fig. 1 and the bond sites of second component The partial sectional view obtained after upper cutting.

Symbol description

1 toothbrush；

2 toothbrush shank body；

3 boundary portion；

4 hollow bulbs；

5 ends；

10 first components；

11 heads；

12 extended portion；

13 plant pore；

14 annular recessed portion；

15 first protuberances；

16 second protuberances；

17 cervical regions；

19 the 3rd protuberances；

20 second components；

21 shanks；

22 wall portions；

23 slits；

25 peristomes；

26 first recesses；

31 filling parts；

32 covering part；

40 bristle tuft；

51 the 4th protuberances；

52 second recesses

Detailed description of the invention

One embodiment ＞ of ＜ toothbrush

The toothbrush of the present invention possesses toothbrush shank body and bristle tuft.With reference to Fig. 1～6H to one embodiment of the present invention Toothbrush 1 illustrates, but the present invention is not limited to this.Toothbrush 1 shown in Fig. 1 is provided with bristle tuft 40 in the shank body 2 of strip.

[toothbrush shank body]

As it is shown in figure 1, the toothbrush shank body 2 of present embodiment possess shank 21, extended in the neck of described shank 21 Portion 17 and be arranged at the head 11 on top of described cervical region 17, from shank 21 to the direction toothbrush shank body 2 of head 11 for long Strip.Cervical region 17 is relative to shank 21 undergauge.In the present embodiment, the boundary of shank 21 with cervical region 17 is referred to as boundary portion 3.

From boundary portion 3, a part for the outer surface of the outer surface of shank 21 side and second component 20 is coated to cap 32 and covers Lid.

The length of the toothbrush shank body 2 of present embodiment is not particularly limited, for example, 120～200mm.

The width of head 11 is not particularly limited, the most preferably 7～13mm, more preferably 8～12mm.As long as above-mentioned lower limit Above, then can substantially ensure that the area implanting bristle tuft 40, as long as below above-mentioned higher limit, improve the most further in oral cavity Operability.The width of head refers to, the length from the end of head to end on the direction vertical with length direction The maximum of degree.

The length of head 11 is not particularly limited, the most preferably 10～30mm, more preferably 12～28mm.As long as above-mentioned lower limit More than value, then can substantially ensure that the area implanting bristle tuft 40, as long as below above-mentioned higher limit, improve oral cavity the most further Interior operability.It addition, the length of head refers to, the bristle tuft 40 from side, end 5 plant burr circle to apical head Length.

The thickness of head 11 can consider that material etc. determines, the most preferably 2～6mm, more preferably 2.5～4mm.As long as More than above-mentioned lower limit, improve the intensity of head 11 further, as long as below above-mentioned higher limit, improve the most further in oral cavity Operability.The thickness of head refers to, the minima of the thickness of head.

The thickness of cervical region 17 can consider that material etc. determines, the most preferably 3～6mm, more preferably 3.5～4.5mm.As long as It is more than above-mentioned lower limit, improves the intensity of cervical region 17 further, as long as below above-mentioned higher limit, improve oral cavity the most further Interior operability.The thickness of cervical region refers to, the minima of the diameter in the cross section when relative to length direction vertically cutting.

As in figure 2 it is shown, the toothbrush shank body 2 of present embodiment possesses first component 10, is formed with second of shank 21 Part 20 and the filling part 31 being made up of elastic resin, this first component 10 possesses to be had head 11 and extends from described head 11 Extended portion 12.Here, a part for extended portion 12 (from the boundary portion 3 of first component 10 to end 5) is inserted in hollow bulb 4. Cervical region 17 is the part exposed in extended portion 12.Specifically, refer to the bristle tuft 40 from side, end 5 plants burr circle to border Part till portion 3.It addition, in hollow bulb 4, filling part 31 is arranged between first component 10 and second component 20.

It addition, the position that letter representation in Fig. 2 is corresponding with the position shown in the letter of Fig. 1.It addition, in fig. 2, omit Bristle tuft 40.

As it is shown on figure 3, in the first component 10 of present embodiment, be formed at head 11 and plant pore 13.Such as Fig. 6 A～ Shown in 6E, extended portion 12 is cylindrical.

As shown in Fig. 3, Fig. 6 B～6D, 6F, from the boundary portion 3 of first component 10 to the end 5 of extended portion 12, press It is sequentially set with annular recessed portion the 14, first protuberance the 15, second protuberance the 16, the 3rd protuberance 19.

As shown in Fig. 3, Fig. 6 B, it is formed with the annular recessed portion 14 around extended portion 12 in boundary portion 3.Furthermore it is possible to formed Annular recessed portion 14, it is also possible to be formed without annular recessed portion 14.

As shown in Fig. 3, Fig. 6 C, the first protuberance 15 from described extended portion 12 on the direction intersected with length direction to bristle Restraint the direction (above-below direction of Fig. 6 C) of 40 sides and the dorsal part to bristle tuft 40 and width (the two of Fig. 6 C are horizontal) this Highlight on four direction.The direction intersected with length direction refers to the direction vertical relative to length direction.Link to four sides Relative line to the first prominent protuberance is preferably arranged to the center by extended portion 12.Link to four direction prominent first The relative line of protuberance preferably vertically intersects.First protuberance 15 can be formed with same intervals, also in the circumference of extended portion Can be formed with different interval.The shape of the first protuberance 15 can be prismatic, it is also possible to is cylindrical.

First protuberance 15 is preferably formed into it and is centrally located at the position of 10～50mm from boundary portion 3.First protuberance 15 is excellent Form slection becomes it and is centrally located at the position of 10～50mm from end 5.

As shown in Fig. 3, Fig. 6 D, the second protuberance 16 from described extended portion 12 on the direction intersected with length direction to bristle Restraint in direction (above-below direction of Fig. 6 D) both direction of 40 sides and the dorsal part to bristle tuft 40 prominent.Link and dash forward to both direction The line of the second protuberance gone out is preferably arranged to the center by extended portion 12.The shape of the second protuberance 16 can be prismatic, also Can be cylindrical.Second protuberance 16 can with in the first protuberance 15 to bristle tuft 40 side and the side of the dorsal part to bristle tuft 40 Highlight abreast to (above-below direction of Fig. 6 C) prominent part, it is also possible to highlight not parallelly.

Second protuberance 16 is preferably formed into it and is centrally located at the position of 20～80mm from boundary portion 3.Second protuberance 16 is excellent Form slection becomes it and is centrally located at the position of 10～50mm from end 5.

As shown in Fig. 3, Fig. 6 F, the 3rd protuberance 19 is prominent to the extended direction of extended portion 12 on end 5.3rd is convex The shape in portion 15 can be prismatic, it is also possible to is cylindrical.

First component 10 is made up of the first resin.In the present embodiment, needed for the first resin considers head 11, cervical region 17 Rigidity, mechanical property etc. selects.As the first resin, there are the modulus of elasticity in static bending (JIS K7203) be 500MPa with Go up and the resin of below 3000MPa, such as, there are PBT, polyethylene terephthalate (PET), poly terephthalic acid ring The polyester fibers such as hexane diformazan alcohol ester (PCT)；POM；The polyolefin such as PP, polyethylene (PE)；Polystyrene (PS)；Acrylic nitrile-butadiene Diene-styrene copolymer (ABS), cellulose propionate (CP), polyarylate, Merlon, acrylonitritrile-styrene resin resin (AS) etc..Wherein, preferably with more than one resins as main constituent selected from polyester fiber and POM, more preferably polyester fiber, POM, further preferred PBT, POM.As long as polyester fiber, POM, improve rigidity the most further, even if therefore being done by head 11 Obtain thinner, it is also possible to obtain sufficient intensity.These resins can be used alone one, it is also possible to two or more combinations is made With.It addition, " main constituent " refers to more than containing 50 mass % in this specification.

As shown in Figure 4, the second component 20 of present embodiment forms shank 21 and this second component 20 is strip.Separately Outward, being formed with hollow bulb 4 at second component 20, this hollow bulb 4 has peristome 25 in cervical region 17 direction.Described hollow bulb 4 quilt Wall portion 22 surrounds.Wall portion 22 is formed as to insert a part (boundary portion from first component 10 of extended portion 12 at hollow bulb 4 3 to end 5).

It is formed with slit in bristle tuft 40 side (upside of Fig. 4) in wall portion 22 and the dorsal part (downside of Fig. 4) of bristle tuft 40 23, this slit 23 extends from peristome 25 (top in wall portion 22) (root in wall portion 22) to the back-end.

Wall in the inside of the hollow bulb 4 observed from peristome 25 side is formed with the first recess 26.Make the first recess 26 become the shape corresponding with the 3rd protuberance 19.

Owing to arranging covering part 32, therefore in terms of the thickness of second component 2, wall portion 22 and neighbouring thinner than other parts One section (Fig. 4, Fig. 6 G, 6H).The part of side, shank middle-range wall portion 22 10～50mm is referred near wall portion 22.

It addition, as shown in Fig. 4, Fig. 6 F～6H, the rear in the wall portion 22 of second component 20 is cylindrical.The thickest by shank Part cutting in the direction of the width after the diameter in cross section that obtains with by behind wall portion 22 and neighbouring cutting in the direction of the width thereof The ratio of the diameter in the cross section obtained is preferably 10:6～20:19.

The length in wall portion is preferably 20:1～2:1 with the ratio of the length of wall portion 22 and neighbouring part thereof.

Second component 20 is made up of the second resin.In the present embodiment, the second resin consider the rigidity needed for shank 21, Determine with the cementability etc. of elastic resin.

As the second resin, such as, can enumerate the material same with the first resin-phase.Wherein, preferred polyolefm, more preferably PP.As long as polyolefin, it becomes possible to improve the cementability of second component 20 and elastic resin.Second resin can be with the first resin Identical, it is also possible to different.

In the present embodiment, as the first resin and the second resin combination, preferably to select from polyester fiber and POM More than one for resins of main constituent as the first resin, using polyolefin as the second resin, more preferably using PBT or POM as First resin, using PP as the second resin.By such combination, make head 11 thinner, make extended portion 12 thinner, improve oral cavity Interior operability, and improve the cementability of second component 20 and elastic resin.

It addition, for example, it is also possible to using the resin of non-light transmittance as the first resin, using the resin of light transmission as the second tree Fat.By such combination, it is possible to make the cosmetic variation variation of toothbrush shank body 2.

As in figure 2 it is shown, a part for the extended portion 12 of first component 10 is inserted in hollow bulb 4.Cervical region 17 is extended portion 12 In the part (that is, in extended portion 12 part) in addition to from the boundary portion 3 part to end 5 exposed.

As shown in Fig. 2, Fig. 6 B, it is provided with the elastic resin constituting covering part 32 in annular recessed portion 14.

As shown in Fig. 2, Fig. 6 C, in hollow bulb 4, interior with wall portion 22 of all or part of of the top of the first protuberance 15 Surface abuts.Thus, in the manufacture method of toothbrush 1 described later, for wall portion 22, in this way it is easy to determine with the length of first component 10 The position in the direction that direction is intersected.Alternatively, it is also possible to be not provided with the first protuberance 15.In the case of being not provided with the first protuberance 15, In use, improve the motility of the action of first component 10 further by the filling part 31 that is made up of elastic resin, brush Tooth pressure becomes better.In the case of the top of the first protuberance 15 contacts with the inner surface in wall portion 22, the first protuberance 15 The shape on top is preferably corresponding with the shape of the inner surface in wall portion 22.Such as, as shown in Figure 6 C, if preferably wall portion 22 interior The cross sectional shape obtained during the cutting in the direction of the width of surface is circular arc, then the top of the first protuberance 15 is cutd open in the direction of the width Cross sectional shape when cutting is also for circular arc.The height (thickness) preferably 0.1～2.0mm of the first protuberance, more preferably 0.5～1.5mm. It addition, the height of filling part 31 (thickness) is corresponding with the height of the first protuberance (thickness).The height (thickness) of filling part 31 and wall Preferred 2:1～20:1 of ratio of the height (thickness) in portion 22.

The length of a part (from the boundary portion 3 of first component 10 to end 5) for the length of cervical region 17 and extended portion 12 Preferred 8:5～8:1 of ratio of degree.

As shown in Fig. 2, Fig. 6 D, the second protuberance 16 is interpenetrating walls portions 22 by slit 23.The top of described second protuberance 16 Identical faces is become with the outer surface of covering part 32.Thus, in the manufacture method of toothbrush 1 described later, described second protuberance 16 Top abuts with mould, determines the position in the direction that the length direction with first component 10 intersects relative to mould.Slit 23 Width can be identical with the width of the second protuberance 16, it is also possible to wider than the width of the second protuberance 16.The height of the second protuberance 16 (thickness) preferably with the height (thickness) of filling part 31, the height (thickness) in wall portion 22 and the height (thickness) of covering part 32 Sum total identical.The length of slit can be identical with the length in wall portion 22, it is also possible to different.

In the present embodiment, as shown in Fig. 2, Fig. 6 F, the 3rd protuberance 19 forms the embedding knot being embedded in the first recess 26 Structure.

Embedded structure is as shown in Fig. 2, Fig. 6 F, and the 3rd protuberance 19 is the shape of column, makes the first recess 26 become with described The shape that shape is corresponding.

By this embedded structure, determine the position of the length direction of first component 10 relative to second component 20.If it addition, Use embedded structure, be then difficult to produce the first component 10 deviation to the direction intersected with length direction.

It addition, embedded structure can also be undercut design.

Undercut design refers to, such as, as it is shown in figure 5, the 3rd protuberance 19 of first component 10 is the shape of column, described Circumferentially disposed 4th protuberance 51 of the side of the shape of column, second component 20 recess inner surface be circumferentially provided with The structure etc. of the second recess 52 of the 4th protuberance 51 correspondence.

In this case, the 4th protuberance 51 inserts the second recess 52, thus first component 10 not only with length direction phase The direction handed over is difficult to produce deviation, is the most also difficult to produce deviation.It addition, according to undercut design, it is possible to make One parts 10 are more firm with the link of second component 20, and when more preventing from using, first component 10 is extracted from second component 20.

As shown in Fig. 2, Fig. 6 C～E, between first component 10 and the second component 20 in hollow bulb 4, it is provided with filling part 31.Described filling part 31 is made up of elastic resin.That is, arrange between the first component 10 in hollow bulb 4 and second component 20 Flexible resin.

Here, " between first component 10 and the second component 20 in hollow bulb 4 " refers to the extended portion shown in Fig. 6 C～6E Between 12 and wall portion 22.

As the kind of the elastic resin constituting filling part 31, for example, it is possible to enumerate olefin-based elastomer, polystyrene bullet Gonosome, polyester fiber based elastomers, polyurethane series thermoplastic elastomer etc..Wherein, optimization styrene based elastomers.Styrene The elasticity of based elastomers is the most excellent, therefore, it is possible to more improve intraoral operability and comfort level of brushing teeth.These resins are permissible One is used alone, it is also possible to be used in combination of two or more.The shore hardness of elastic resin preferably 10～60.It addition, Shao Family name's hardness can be measured by the method for JIS K6253 shore A.

As shown in Fig. 2, Fig. 6 B～6G, in shank 21, the region comprising wall portion 22 is provided with covering part 32.

Described covering part 32 is identical with filling part 31, is made up of elastic resin.Constitute the kind of the elastic resin of covering part 32 Class is identical with the elastic resin constituting filling part 31.

In the present embodiment, filling part 31 is connected by slit 23 and peristome 25 with covering part 32.

First component 10 and second component 20 mainly pass through peristome 25 and slit 23 by filling part 31 with covering part 32 Connection, elastic resin and second component 20 between bonding force or frictional force etc. and link securely.

[bristle tuft]

As it is shown in figure 1, the toothbrush 1 of present embodiment has above-mentioned toothbrush shank body 2 and is implanted in the multiple of head 11 Bristle tuft 40.Specifically, pore 13 is planted shown in the implanted Fig. 2 of bristle tuft 40.

Bristle tuft 40 is that many bristles of harness form.

Plant needed for hair side length (staple length) to the top of bristle tuft 40 can consider bristle tuft 40 from head 11 Hair hardness etc. determine, for example, 6～13mm.

All of bristle tuft 40 can be identical staple length, it is also possible to mutually different.

Hair hardness etc. needed for the thickness (bristle beam diameter) of bristle tuft 40 can consider bristle tuft 40 determines, for example, 1 ～3mm.All of bristle tuft 40 can be identical bristle beam diameter, it is also possible to mutually different.

As constitute bristle tuft 40 bristle, such as can enumerate the bristle diameter towards tippy tea taper into, tippy tea quilt The bristle (taper hair) of sharpening, from the bristle (straight hair) etc. that the diameter planting hair side bristle towards tippy tea is roughly the same.Directly Shape hair can be enumerated and make tippy tea is that the bristle of the plane almost parallel with planting hair side, tippy tea are accomplished hemispherical bristle etc..

Form the radical preferably 10～180 of the bristle of a branch of bristle tuft.

The material of bristle such as can enumerate the polyamide such as 6-12 nylon (6-12NY), 6-10 nylon (6-10NY), PET, PBT, PTT (PPT), PEN (PEN), polybutylene naphthalate (PBN) etc. Polyester fiber, the polyolefin such as PP, the elastic resin etc. such as polyolefin elastomer, styrene series elastomer.

These resin materials can be used alone one or be used in combination of two or more.

It addition, bristle can also be the sheath portion with more than at least one of which in core and the outside that is arranged at described core The polyester fiber bristle of multiple cored structure.

The shape of cross section of bristle is not particularly limited, and can be the circle such as circular, ellipse, polygon, star, SANYE Cloverleaf pattern, or the cloverleaf pattern etc. of four leaves.It addition, the cross sectional shape of all of bristle can be identical, it is also possible to different.

The thickness of bristle can consider that material etc. determines, when cross section is circular, and for example, 6～9mil (1mil=1/ 1000inch=0.025mm).Additionally, it is contemplated that use sense, brush to sweep sense, clean effect, durability etc., can at random combine and make With many different bristles of thickness.

[manufacture method]

The manufacture method of toothbrush 1 is after forming first component 10 and second component 20 respectively, by the shape such as being insert molded Become toothbrush shank body 2.Such as, by a part for the extended portion 12 of first component 10 being inserted the hollow bulb 4 of second component 20 The first operation and fill the second operation of elastic resin at filling part 31, thus obtain toothbrush shank body 2.

Then, the head 11 in described toothbrush shank body 2 implants bristle tuft 40, obtains toothbrush 1.

First component 10 and second component 20 are obtained by well-known manufacturing process such as injection mo(u)ldings.

Hereinafter, in the manufacture method by being insert molded the toothbrush 1 carrying out the present invention in the case of the second operation One example illustrates.

First, second component 20 is configured in mould.In the inside of this mould, it is being configured with first component 10 and second Under the state of parts 20, form the chamber of the shape corresponding with covering part 32.

Then, by a part (from the boundary portion 3 of first component 10 to end 5) for the extended portion 12 of first component 10 so that Second protuberance 16 mode of movement in slit 23 inserts the hollow bulb 4 (the first operation) of second component 20, the 3rd protuberance 19 Top embeds the first recess 26 of second component 20.

Then, mould is closed.When first component 10 and second component 20 are configured in mould, the first protuberance 15 and The inner surface in the wall portion 22 of two parts 20 abuts, and the top prominent outside wall portion 22 of the second protuberance 16 abuts with mould, therefore When being molded elastic resin, first component 10 is difficult to deviate.

Then, it is configured with the state of first component 10 and second component 20 with the inside at mould to be molded into by elastic resin In mould.The elastic resin being molded in mould is filled into filling part 31 (the second operation) by slit 23, peristome 25.Separately Outward, the covering part 32 covering a part for shank 21 and the outside in wall portion 22 is formed with desired thickness.By at filling part 31 and covering part 32 elastic resin is set, thus first component 10 is fixed to one another with second component 20.

The temperature preferably 20～80 DEG C of mould when elastic resin being molded in mould.

Carry out planting bristle tuft 40 operation (the 3rd operation) of pore 13 further, thus form toothbrush.3rd work Sequence can be carried out after the second operation, it is also possible to carried out before the first operation.As the fur planting method of bristle tuft 40, such as It is listed below method: by bristle tuft 40 doubling, the lenticular wire being sandwiched there between is squeezed into and plants pore 13, thus implant the flat of bristle tuft 40 Wire type plants hair；The lower end of bristle tuft 40 is pressed into and becomes in the molten resin planting pore 13 and fixing hot melt connection；In heating The lower end of bristle tuft 40 and after forming molten mass, molten resin is injected in mould and forms the Mo Neifa etc. planting pore 13.

As it has been described above, according to present embodiment, arrange the filling part 31 being made up of elastic resin, therefore obtaining can be with suitable When the toothbrush shank body 2 that is cleaned of toothbrushing force and toothbrush 1.This is by using as motility higher at filling part 31 The elastic resin of resin, thus relaxed toothbrushing force when using.

Therefore, if using the toothbrush 1 of present embodiment, then bristle tuft 40 can be made suitably to support with cleaning object position Connect, be cleaned with suitable toothbrushing force, therefore wipe across effect and improve further.

Obtain according to the present embodiment and above-mentioned wipe across effect, even if therefore in order to make head 11 diminish or make head 11 Thinning or make cervical region 17 thinner and use the resin of the high intensity such as POM at first component 10, it is also possible to more appropriate pressure of brushing teeth Power is cleaned, and obtains good wiping across effect.

It addition, in the present embodiment, if use the resin of the high intensity such as POM at first component 10, it is possible to prevent from passing through Head in the use that the damage of head 11 when flat wire type plants hair to implant bristle tuft 40, the reduction of the intensity of head 11 cause The damage of 11.

In the manufacture of present embodiment, when configuring first component 10 and second component 20 in mould, the first protuberance 15 abut with the inner surface in wall portion 22, and the top of the second protuberance 16 of interpenetrating walls portions 22 is supported with mould by slit 23 Connect, therefore when being molded elastic resin, it is difficult to cause the deviation that first component 10 can produce in the direction intersected with length direction.

It addition, present embodiment extended portion 12 from boundary portion 3 to end 5, such as in bristle tuft 40 side and The side of the dorsal part of bristle tuft 40 is upwardly formed the through hole that elastic resin can pass through, thus easily fills elasticity tree during fabrication Fat.It addition, by arranging elastic resin in this through hole, so that first component 10 is more firm with the link of second component 20 Gu.

＜ other embodiments ＞

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

In the above-described embodiment, the first protuberance 15 can be set, it is also possible to is not provided with.During fabrication, relative to First component 10 is fixed to desired position by two parts 20, is therefore preferably provided with the first protuberance 15, more preferably at least arranges At two.Further preferably at least provided with everywhere.

In the above-described embodiment, the second protuberance 16 can be set, it is also possible to is not provided with.During fabrication, in order to relatively It is fixed on desired position in mould, is therefore preferably provided with the second protuberance 16, more preferably at least arranges at two.

In the above-described embodiment, in the embedded structure formed by the 3rd protuberance 19 and the first recess 26, if making End 5 beyond the top of the 3rd protuberance 19 does not abuts with second component 20 and arranges gap (with reference to Fig. 7), then due to elasticity tree Fat is filled into gap, therefore, it is possible to the deflection of the cervical region 17 when making use is bigger.Thus, in use, it is possible to make brush Pieces 40 more suitably abuts with cleaning object position, is cleaned with less toothbrushing force, it is thus achieved that soft contact sense.

Alternatively, it is also possible to be following structure: be not provided with the 3rd protuberance 19 and the first recess 26 and make it be even surface, the One parts 10 and second component 20 only abut at described even surface.

In the above-described embodiment, covering part 32 can be set, it is also possible to be not provided with.Except making first component 10 and Beyond two parts 20 more firmly link, during use, finger is difficult to slide, and is therefore preferably provided with covering part 32.The thickness of covering part 32 Degree preferably 0.5～2.0mm.

In the above-described embodiment, slit 23 can be formed, it is also possible to be formed without.In the feelings being provided with the second protuberance 16 Under condition, in order to easily first component 10 be inserted second component 20 during fabrication, it is preferably formed as slit 23.Convex being not provided with second In the case of portion 16, preferably it is formed without slit 23.It addition, in the case of not forming slit 23, in order to the most easily will Elastic resin is filled into filling part 31, preferably forms the through hole that elastic resin can be made to pass through in wall portion 22.

In the above-described embodiment, extended portion 12 is cylindrical, but in the present invention, extended portion is not limited to cylinder. As other modes of extended portion, such as, enumerate multi-edge column-shaped.In the case of for multi-edge column-shaped, fillet is preferably used.That is, exist Not losing in the range of the effect of the present invention, extended portion 12 can select desired shape.

In the above-described embodiment, making second component 20 is cylinder, but in the present invention, second component is not limited to circle Cylindricality.As other modes of second component, such as, enumerate multi-edge column-shaped.In the case of for multi-edge column-shaped, circle is preferably used Angle.That is, in the range of the effect not losing the present invention, second component 20 can select desired shape.

Industrial applicability

Claims

1. a toothbrush shank body, is formed as strip and possesses shank, the extended cervical region in described shank and arrange Head in the top of described cervical region, it is characterised in that possess:

First component, this first component is provided with described head and the extended portion extended from described head；And second component, should Second component forms described shank, and is formed with the hollow extending along its length and being surrounded in the wall portion of side's opening Portion,

A part for described extended portion is inserted in described hollow bulb,

In described hollow bulb, between described first component and described second component, it is provided with elastic resin.

Toothbrush shank body the most according to claim 1, it is characterised in that

In described extended portion, the first protuberance that the oriented direction intersected with length direction is prominent, the top of described first protuberance are set Contact with the inner surface in the described wall portion surrounding described hollow bulb.

Toothbrush shank body the most according to claim 1 and 2, it is characterised in that

In described extended portion, the second protuberance that the oriented direction intersected with length direction is prominent, the described second through bag of protuberance are set Enclose the described wall portion of described hollow bulb.

4. according to the toothbrush shank body according to any one of claim 1-3, it is characterised in that

Form the 3rd protuberance that oriented extended direction is prominent in the end of described extended portion, be formed at described second component The recess corresponding with described 3rd protuberance.

5. a toothbrush, it is characterised in that have:

Toothbrush shank body according to any one of claim 1-4 and the bristle tuft of the described head of implantation.

6. the manufacture method of the toothbrush shank body according to any one of claim 1-4, it is characterised in that have:

A part for described extended portion is inserted the first operation of described hollow bulb；And

The second operation of elastic resin is filled between described first component and described second component in described hollow bulb.

The manufacture method of toothbrush shank body the most according to claim 6, it is characterised in that

In described second operation, while filling elastic resin between described first component and described second component, formed Cover the covering part of a part for shank.