CN1305352A - Toothbrush with exchangeable part - Google Patents

Abstract

The invention relates to a toothbrush comprising a handle, a head in the form of an elongated housing which is open on one side, a brush part removably inserted in said housing and having a support with bristles mounted thereon. On the rear side of the support, the inventive toothbrush has a projection penetrating in an opening located in the rear part of the housing. The support with said projection is composed of an elastic rubber material which enables elastic sealing against said housing and with its projection sealing against the opening. The brush part can be ejected from the housing by applying pressure on the projection through elastic deformation of said support. The bristles are fixed to the support by welding or injection.

Description

The toothbrush that has removable hairbrush part

The present invention relates to a kind of toothbrush, have a handle, the head that the long narrow box body of an opening constitutes, one is contained in removable brush members in the box body, this brush members comprises a supporting mass and the bristle of fixing on it, there is a boss at the back side of supporting mass, the breach tabling at it and box body back, brush members can be taken out from box body under acting on the pressure of boss.

Adopt the brush members that is fixed on replaceably on the brush can reach a plurality of purposes.In the use of toothbrush, can cause bristle, especially the bristle end fray.According to present dental medicine knowledge, the bristle end should domeshape ground rounding, with antisitic defect enamel and injury gum.Although at present by corresponding production technology measure can successfully the bristle end be found no fault with the ground rounding, yet in use worn and torn soon and lost the shape of its rounding.Also have other wear phenomenon to occur, no longer can erect as bristle etc.Therefore, brush tooth three times every day by dentists recommend, a toothbrush uses several weeks just should change.For avoiding serious waste of material or perhaps, using toothbrush just to seem more and more important with replaceable hairbrush part in order to save resource.On the one hand, only need abandon the bad part of wearing and tearing, on the other hand, can encourage the user to change regularly thus.Final result is to make the user save suitable spending because the overwhelming majority of toothbrush can continue to utilize.

Removable hairbrush part must be fixedly mounted in toothbrush head, and it can not be got loose in use prematurely.On the other hand, should just the hairbrush part can be unloaded from brush with relative less action force, especially should be by means of instrument.There are some structural designs to satisfy such condition.As known (DE4434617A1 and DE3724640C2) head is made the box body of an opening, inwall has groove or projection, has corresponding projection or groove on the supporting mass simultaneously, and they are at supporting mass mutual kayser when opening surface is pressed into box body.Simultaneously supporting mass has a sealing strip that overlaps mutually with the box opening bottom surface.For the hairbrush part can be unloaded, be provided with the boss of a tenon pattern at the back side of supporting mass, the breach tabling of this boss and box body back respective shapes.Exert pressure and hairbrush partly can be unloaded to it in the back side from the head.

These known brushes have its weak point with the structural design that hairbrush part shape engages sealedly, that is exactly, and has the slit to exist unavoidably between brush and the hairbrush part, and liquid, toothpaste residue enter wherein, this may cause hygienic issues, because be easy to breed bacteria especially at the place, slit of humidity.Its weak point also shows more strongly: brush is generally made by duroplasts, under the supporting force effect that continues, can cause creep and fatigue phenomenon as everyone knows.This makes reliability that hairbrush partly installs, durability discount to some extent again.And along with the slit becomes big, hygienic issues is also more serious.

Such hygienic issues solves in another known structural design (DE19624962A1) like this, the boss at the supporting mass back side flexibly is entrenched in the brush, therefore the side of the sidewall of box body and corresponding supporting mass need not to satisfy fastening effect, and can closely and entirely fit together each other, avoided occurring between the two the slit.People attempt to reach similar effects (DE19600767C1) by placing a plurality of sealing rings, and this makes on the production technology on both expensive and the function and unreliable.

According to another program (DE2311043A1), supporting mass is made by rubber elastic material, and the force closure ground brush of packing into.Brush is the frame structure of annular, and the above and below of brush is an opening.The caoutchouc elasticity supporting mass is pressed into the ring frame, draws off from the back side extrusion during replacing.Because circular brush must have less diameter, again because the requirement of stability, the wall thickness of annular box body must not be lower than certain numerical value, cause area of bristles very little on the one hand, supporting mass has only very little deformable volume on the other hand, and makes the sealing of supporting mass and box body to be confined to a certain extent.If in order to reach enough sealing effectiveness, correspondingly the supporting mass size is done very greatly, the deformation drag when it is pressed into and extrudes also can be very big, the packing into and draw off also just very difficult of supporting mass.In known structural design, there is a recess at the back side of supporting mass, and dirt gathers unavoidably there.

All known structural designs exist following shortcoming: in order bristle to be fixed on supporting mass and to reach enough tension intensitys, bristle must be fixed on the supporting mass with certain-length.Usually the thickness of brush depends on this regular length to a great extent.Have the toothbrush of removable hairbrush part, its head thickness must strengthen, because be fit to the wall thickness that the supporting mass thickness of necessary regular length also will add the upper cartridge body back.Thereby in the increase of brushhead bit architecture height, this does not expect for its function.Brush should be elongated as far as possible, so that very narrow in oral cavity space, especially during child, avoids bristle especially externally too to lodge at the molar position.Sometimes wish also that there is certain elasticity at the brush position, this can only just can realize when head has accordingly than small intensity.The known toothbrush with replaceable hairbrush part is because of its excessive structure height can't satisfy this requirement.

The objective of the invention is to, make a kind of toothbrush with replaceable hairbrush part that can overcome above-mentioned shortcoming.

Solve this problem by the following method according to the present invention, supporting mass has boss, make with rubber elastic material, it and box body seal with its boss and breach caoutchouc elasticity ground, caoutchouc elasticity distortion because of supporting mass when pushing boss can partly draw off hairbrush, and wherein bristle is fixed on the supporting mass by welding or injection moulding (Einspritzen).

Made by rubber elastic material according to supporting mass of the present invention, it must satisfy: when pushing the supporting mass back side, hairbrush is partly just owing to the caoutchouc elasticity distortion of supporting mass can draw off.In other words, hairbrush part mainly is that caoutchouc elasticity restoring force by the supporting mass material is fixed in the supporting mass.Chucking power, and if advocating of applying when drawing off bear by the rubber elastic material of supporting mass, the power that acts on toothbrush head is much smaller, thereby the there can not produce permanent deformation.

Secondly the rubber-elastic, construction of supporting mass also allows: take measures necessary to apply chucking power in any position of supporting mass structure height, especially the deformability of supporting mass and boss directly is used as the elastic packing of all opening edges of box body.On the other hand, although supporting mass is the caoutchouc elasticity structure, must guarantee that also bristle is sufficiently fixing.Address this problem by known technique for fixing in the present invention, i.e. bristle ends welding or mode.Sheet Metal Forming Technology fixing means commonly used, the brushing cluster that will insert loop wire by the anchor line is fixed in the supporting mass, by comparison, the advantage of this fixing means is, it is minimum that regular length can reduce to, and makes supporting mass can do very thinly, thereby reduced the total structure height of brush.By this welding or injection molding way, even if the supporting mass strain, when particularly drawing off the hairbrush part, bristle also has enough being fastenedly connected.Can bear the pulling force effect of 25N without difficulty, this is impossible for Sheet Metal Forming Technology commonly used.

Very advantageously, supporting mass has an annular edge strip that closely covers on the box bottom on the bearing-surface of bristle, and it is closely fitted with the form of sealing strip owing to the elastic rubber characteristic of supporting mass material, avoids producing the slit in addition again.This sealing strip also may snap into the side of brush always under the necessary situation, has so just formed the sheath of a protection mucosal tissue simultaneously in hard head toothbrushes outside.

Fixing (method) according to bristle of the present invention and supporting mass, also bristle can be installed on sealing strip, and in other all known structure, exist a suitable segment distance between the ring limit of bristle pack and brush, by comparison, the present invention then is the whole width that utilized brush, in other words, can correspondingly reduce the width of brush.

Bristle can be fixed by the method for end face welding or insertion welding.Yet the method that had better utilize injection moulding plant into, the overstriking position of a welding is arranged in its stiff end end like this, bristle is planted in the supporting mass by the method for extruding applying (Umspritzen) with the supporting mass material whereby.Wherein the overstriking position is proved to be preferably every limit and all exceeds bristle shell surface 0.1 to 0.2mm.

Guaranteed by above-mentioned measure, even when packing into and draw off supporting mass generation strain, bristle also can have enough tension intensitys and keep connecting.

Brush component is fixed in the box body ground of force closure purely, just only undertaken by the caoutchouc elasticity distortion, such as the mode that pressing force cooperates, in addition, the box body and/or the breach that form an opening of brush can also be provided with projection on the surface of supporting mass, its shape is fitted in the supporting mass matchingly.

Supporting mass preferably be provided with box body and/or breach on the groove that matches of projection.This structure is compared with the aforesaid mode that only depends on force closure to engage, and advantage is, enters the sealed moment of shape can feel to obtain, and the user also can note obtaining the hairbrush part and when be only and be in place.

At last, the breach at brush back can also be covered with a flexure strip, supporting mass or its boss are close to this flexure strip.

The back side of guaranteeing brush in such a way also is closing seam.

Below by illustrated embodiment the present invention is described.Represent among the figure:

The partial view of the back side top view of Fig. 1 toothbrush;

Fig. 2 presses II-II profile of Fig. 1;

The bristle pack vertical view of Fig. 3 toothbrush;

Fig. 4 presses IV-IV profile of Fig. 3;

Profile when Fig. 5 dismantles the hairbrush part by Fig. 4;

The profile of the another kind of structural shape that Fig. 6 is corresponding with Fig. 4.

Toothbrush shown in Fig. 1 to 3 is made up of a handle 1 (drawing with tear type among the figure), a brush 2 and a removable hairbrush part 3, and hairbrush partly has a supporting mass 4, and it has the bristle pack 5 that is formed by independent brushing cluster 6.

The brush 2 of toothbrush is made box body 7, and the hairbrush part of band supporting mass 4 can be packed into wherein with changeing.Supporting mass is made by rubber elastic material, preferably is made up of the good elastomer of compressibility.

Box body 7 has annular wall plate 8 as lateral boundaries, and it seals (as Fig. 2 and 4) to handle 1 place by wall 9.Annular wall plate 8 forms a kind of closed-in construction with wall 9, and it constitutes the installation cavity of a bottom opening to hold supporting mass 4 with the back side 10.

In the illustrated embodiment, box body also has a breach 11.Flat supporting mass 4 in bristle pack 5 sides is made of a plate shape part 13 and a tenon shape boss 14, and the profile of plate shape part conforms to the inboard formed profile of wallboard 8 and end wall 9, and the boss of tenon shape passes breach 11, flexibly fits over its inside simultaneously mutually.Boss have an end face that exposes slightly projection expose outside the back side 10 of box body 7, its forms and to add pressure surface 15.As shown in Figure 1, this adds pressure surface 15 and can observably highlight, and concavo-convex profile in case of necessity in its surface also can be shaped.But breach 11 also can be with a flexible sheets sealing of being made up of elastomer, and active force can act on the pressure face 15 by it.

The cross section of box body 7 can be the box structure of rectangle.Thereby the strain of supporting mass is enough to make the hairbrush partial fixing to be installed and sealing.In the illustrated embodiment, wallboard 8 slopes inwardly slightly.Inwall at wallboard 8 is provided with positioning tab 12 in this case, and it matches with the detent 16 that correspondingly forms on the plate shape part 13 of supporting mass 4.

By Fig. 2 and use location shown in Figure 4 as can be seen, with a finger to bristle pack direction press pressure face 15, make and add pressure surface 15 and inwardly arch upward, the distortion that continues in supporting mass causes locating lactch groove 16 and comes from positioning tab 12 disengagings, therefore hairbrush part 3 can be pushed out, and hairbrush part 3 just can be at an easy rate with new having replaced mutually.Tuft 5 outwards opens and can not decoherence from supporting mass 4 in this process.

The bristle 6 of hairbrush part 3, welding be (tuft 20) on supporting mass 4, perhaps welding (tuft 21) in supporting mass, or establish overstriking position 17, it extrudes applying (tuft 22) with the supporting mass material.

The plate shape part 13 of supporting mass 4 has the edge strip 23 of an annular in according to the version of Fig. 1 to 5; it outwards is overlapped on the opening surface of box body 7; form a sealing strip, play the additional seal effect, the seamed edge that covers box body 7 simultaneously forms the protective layer of mucosal tissue.

According to embodiment shown in Figure 6,10 breach, 11 places are provided with a cylindricality wall 18 at the back of box body 7, it the box body inner face inwards direction have positioning tab 19 or the annular positioning convex, it is embedded in the plate shape part 13 of supporting mass 4 and the groove 19 that boss 14 transition positions correspondingly form, so that supporting mass produces additional caoutchouc elasticity distortion.

Claims (9)

1. toothbrush, comprise a handle (1), a brush (2) of making the long narrow box body (7) of opening, one is installed in removable hairbrush part (3) in the box body, the bristle (5) that this hairbrush partly comprises a supporting mass (4) and is fixed thereon, one boss (14) is arranged at the back side of supporting mass simultaneously, breach (11) tabling at it and box body (7) back, the hairbrush part can be taken out from box body by the pressure that acts on boss, it is characterized in that, the supporting mass (4) that has boss (14) is made by a kind of rubber elastic material, it and box body (7), its boss and breach (11) seal with caoutchouc elasticity simultaneously, hairbrush part (3) is under the pressure effect on the boss, because the caoutchouc elasticity of supporting mass is out of shape and can takes off from box body (7), wherein bristle (6) is fixed on the supporting mass (4) with welding or injection molding way.

2. according to the toothbrush of claim 1, it is characterized in that supporting mass (4) has the edge strip (23) of an annular in the one side of its supporting bristle (6), it closely covers on the opening bottom surface of box body (7).

3. according to the toothbrush of claim 2, it is characterized in that edge strip (23) snaps into the side of box body (7) always.

4. according to the toothbrush of one of claim 1 to 3, it is characterized in that, bristle (6) also is installed on the edge strip (23).

5. according to the toothbrush of one of claim 1 to 4, it is characterized in that bristle (6) has the superincumbent overstriking of welding position (17) in its fixation side end, by the method for extruding applying with caoutchouc elasticity supporting mass material it is planted in the supporting mass (4) whereby.

6. according to the toothbrush of claim 5, it is characterized in that every limit, overstriking position (17) all exceeds bristle (6) shell surface 0.1 to 0.2mm.

7. according to the toothbrush of one of claim 1 to 6, it is characterized in that box body (7) and/or breach (11) are being provided with projection (12,18) on supporting mass (4) surface, its shape is entrenched in the supporting mass (4) matchingly.

8. according to the toothbrush of claim 7, it is characterized in that, with supporting mass (4) have with box body (7) and/or breach (11) on the corresponding groove of projection (12,18) (16,19).

9. according to the toothbrush of one of claim 1 to 8, it is characterized in that the breach (11) at box body (7) back (10) covers with a flexible sheets, it bears pressure when taking out (hairbrush part), and supporting mass (4) is close to this flexible sheets with its boss (14).

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