CN101674750A

CN101674750A - Toothbrush with metal skeleton and plastic body moulded around it

Info

Publication number: CN101674750A
Application number: CN200880011547A
Authority: CN
Inventors: R·H·达维斯; G·德普拉诺; D·G·萨维尔
Original assignee: Unilever NV
Current assignee: Unilever PLC; Unilever NV
Priority date: 2007-04-12
Filing date: 2008-03-07
Publication date: 2010-03-17
Also published as: US20100125962A1; WO2008125393A1; EP2134212A1; BRPI0809817A2; MX2009010971A

Abstract

Toothbrush having a head, a neck and a handle, the toothbrush comprising a plastic body and a metal skeleton, the plastic body being moulded around the metal skeleton, the metal skeleton extending from the handle through the neck and into the head of the toothbrush.

Description

Has metallic framework and around the toothbrush of the plastic body of its casting

Technical field

The present invention's design has the toothbrush of casting plastic body and metallic framework.

Background of invention

Although prior art still needs toothbrush that cleaning effect further can be provided.

Summary of the invention

Therefore, the invention provides a kind of toothbrush according to claim 1.

Metallic framework extends into the head of toothbrush from handle through neck.The volume that metallic framework can enlarge markedly neck just offers the enough intensity of toothbrush stem, thereby can brush the tooth of back effectively, because the oral cavity can be full of by toothbrush.Make the user like this when the tooth of brush front, can be willing to ground operate toothbrush freely as it.

Preferably, skeleton occupies the toothbrush area at the long partly any cross section of the cross-section toothbrush y direction at place of toothbrush stem 0.5cm and is not more than 30%, more preferably is not more than 25%, is not more than 20% especially.The necessary starting and ending of the long part of this 0.5cm is in toothbrush stem.Neck is considered to originate in the joint with head, ends at the toothbrush handle starting point.

Preferably, metallic framework is generally housed in the plastic body.

Preferably, metallic framework extends 50% of brush length at least, and more preferably at least 75%, preferably at least 90% of brush length.

Preferably, plastic body is made by transparent or semitransparent material.This means that can see through plastic body to the small part skeleton sees.More preferably, at least 50% of the skeleton surface, especially preferably at least 80% can see through plastic body and see.

Preferably, head is made up of part, head skeleton part and the bristle bearing part of plastic body.Preferably, at least one part, two parts more preferably, preferably all three parts are layerings.

Preferably, the head skeleton part is made up of the flat part in the toothbrush head.More preferably, the external dimensions of flat part is corresponding with the external dimensions of toothbrush head.This structure surface area of bearing pressure on it when bigger brushing teeth is provided is supported for toothbrush head provides with improvement.

Preferably, the external dimensions of the corresponding head configuration of the skeleton in the head is shaped.Like this when brushing teeth for neck provides further support, because the pressure that is applied to head is by relatively large surface bears, rather than only by single line that enters neck or bow carrying.Preferably, the skeleton in the head is porose.The hole on framework that has in the toothbrush head provides improved combination between plastic body and the head remainder.

Preferably, head is made up of the plate of supporting bristle.Preferably, this plate is different from the head remainder.More preferably, bristle is fixed by the through hole in the plate.

Preferably, bristle is fused into a plurality of tufts in its root end.

Preferably, bristle is gathered into a plurality of tufts, passes the through hole in the plate, in its root end welding, thereby is fixed in the plate.Plate is cast on the toothbrush remainder then.

Preferably, skeleton comprises and holds and holding plate is in place holds member.Promote the integrality of the entire infrastructure of toothbrush head like this, because the probability that it will plate waves when plate and skeleton are cast plastic body drops to minimum.Preferably, holding member is a groove.

Preferably, skeleton is made up of the groove that partly extends along its length.The plastics that form plastic body when this groove provides injection moulding are along its groove that flows.Reduced the decanting point that needs on a plurality of toothbrushes like this.Preferably, groove extends at the toothbrush downside.The downside of toothbrush is a side relative with the bristle load side.

Preferably, toothbrush according to the present invention is made up of metallic framework.Preferably, metal is made up of kirsite.Preferably, kirsite is a Zama gram kirsite.

Preferably, plastic body comprises acrylonitrile-butadiene-styrene (ABS) (ABS) or BR.ABS and BR provide suitable intensity and toughness when centering on metallic framework.

Preferably, toothbrush according to the present invention have along neck at least the cross-sectional area between 1cm length inner frame and whole toothbrush than scope 1: 7 to 1: 3, preferred 1: 4 to 1: 6.More preferably, along neck at least in the 2cm length, most preferably along in the neck 3cm length, the cross-sectional area between skeleton and whole toothbrush was than scope 1: 7 to 1: 3, preferred 1: 4 to 1: 6.The level of the metal in the toothbrush stem is to help realizing that toothbrush further arrives the purpose of back teeth.

Description of drawings

With reference to the non-limiting accompanying drawing in back embodiments of the invention are described below, wherein:

Fig. 1 is the plane of the skeleton of toothbrush according to the present invention;

Fig. 2 is the sectional view of the A-A part of skeleton shown in Figure 1;

Fig. 3 is the sectional view of the B-B part of skeleton shown in Figure 1;

Fig. 4 is the plane of skeleton shown in Figure 1 in the toothbrush according to the present invention;

Fig. 5 is the side view according to the head of toothbrush of the present invention; And

Fig. 6 is the side view of hair brushing plate.

The specific embodiment

On the details, Fig. 1 has shown the skeleton of toothbrush (1) according to the present invention.Skeleton (1) has handle portion (2), neck (3) and head (4).Head has the girth (5) of corresponding toothbrush head (not shown).

Fig. 2 is the cross-sectional view of Fig. 1 along the A-A direction, and has shown the groove (6) at the skeleton downside.

Fig. 3 is the cross-sectional view of Fig. 1 along the B-B direction, and has shown the groove (6) at the skeleton downside.

Fig. 4 is the plane of toothbrush, has wherein used skeleton shown in Figure 1.Toothbrush has handle (8), neck (9) and head (10).Handle (8) extends to head from the brush end of toothbrush, up to the end end of thumb grip.Neck (9) extends to the initiating terminal of head from the end end of thumb grip (11).Head (10) extends to the top of toothbrush from neck.

Fig. 5 is the side view (not showing bristle) of toothbrush head.Head has shown the skeleton (4) of plastic body (12) that is arranged on the toothbrush head downside and the plate (13) that is fixed for carrying bristle on it.

Fig. 6 has shown plate, follows bristle to be fixed in wherein and pass from its downside to protrude in outside it, and bristle is fixed on the appropriate location of its downside by its end of welding.

Claims

1, toothbrush has head, neck and handle, and this toothbrush comprises plastic body and metallic framework, and plastic body is around the metallic framework casting, and metallic framework passes the head that neck extends into toothbrush from handle.

2, toothbrush according to claim 1, wherein: metallic framework is completely contained in the plastic body.

3, toothbrush according to claim 1 and 2, wherein: metallic framework extends at least 50% of brush length.

4, according to aforementioned any described toothbrush of claim, wherein: plastic body comprises transparent or semitransparent material.

5, according to aforementioned any described toothbrush of claim, wherein: metal framework comprises the flat part in the toothbrush head.

6, toothbrush according to claim 5, wherein: flat part is porose.

7, according to aforementioned any described toothbrush of claim, wherein: skeleton comprises the groove that extends along its partial-length.

8, toothbrush according to claim 7, wherein: groove is positioned on the downside of skeleton.

9, according to aforementioned any described toothbrush of claim, wherein: skeleton comprises kirsite.

10, according to aforementioned any described toothbrush of claim, wherein: along the neck length of 1cm at least, the lateral cross ratio is 1: 7 to 1: 3 between skeleton and whole toothbrush, preferred 1: 4 to 1: 6.