DE1233821B - Toothbrush - Google Patents

Description

GERMAN PATENT OFFICE

German KL: 9b -7/06

EDITORIAL

Number: 1233 821

File number: P 35212 III / 9 b

1 233 821 filing date: October 2 , 1964

Opened on: February 9 , 1967

The invention relates to a toothbrush whose brush head is equipped with three parallel rows of bristle tufts and in which part of the bristle tufts is attached to a tongue that is hinged to the brush head and can be pivoted out of the plane of the brush head.

In one known arrangement, the entire central portion of the brush head is associated with its three brush tufts longitudinal rows designed as a movable tongue. This arrangement is suitable especially for cleaning the tooth walls, as this also removes such teeth from the bristles of the movable ones Tongue are detected, which are not strictly aligned with adjacent teeth, but something offset against the latter are arranged. In contrast, the toothbrush according to the invention has the task of To facilitate thorough cleaning of the horizontal face of the teeth, which is necessary is that only the middle row of bristles penetrate into the indentations of the tooth surface can.

This object is achieved according to the invention in that the middle longitudinal row of bristle tufts is arranged on two tongues, each of which is hinged with a narrow side at one end of the brush head and can be pivoted independently of one another, the bristles of the middle longitudinal row of bristle tufts being longer than the bristles of the two outer ones Long rows of bristle tufts.

This object is not achieved by the known arrangement, since there is a penetration of the middle Longitudinal rows of bristles to lower-lying sections of the tooth surface through the higher-lying tooth edges is prevented and an adjustability of the effective bristle height across the width of the toothbrush is not provided.

A change in the effective bristle height across the width of the brush head depending on the tooth shape is already known per se, but the known arrangement has a considerably more complicated one Build on. In particular, in the known arrangement, all the longitudinal rows of tufts of bristles are individual attached to springs, which makes the production of the brush much more expensive.

In contrast to the known arrangement in which all tufts of bristles have the same length and are pivotably arranged, according to the invention, only the middle longitudinal row of bristle tufts has a larger one Length up, and only the middle row of bristle tufts can be swiveled out of the plane of the brush head.

Due to the different bristle length of the middle and the two outer boron toothbrushes

Applicant:

EI du Pont de Nemours and Company,
Wilmington, Del. (V. St. A.)

Representative:

Dr.-Ing. W. Abitz and Dr. D. Morf,
Patent Attorneys, Munich 27, Pienzenauer Str. 28

Named as inventor:
Aaron House Brennesholtz,
Ridgewood, NJ (V. St. A.)

stenlängsreihen is a satisfactory cleaning effect despite this simplified training achieved. In the drawing shows

F i g. 1 is a plan view of the toothbrush according to the invention,

F i g. FIG. 2 is a side view, partly in section, taken along line 2-2 of FIG . 1,

F i g. 3 shows a cross section along the line 3-3 of FIG . 1 and

F i g. 4 and 5 show the effect of the brush in use.

The toothbrush has a handle 10 which has a rigid brush head fitted with bristles at one end 11 has. On the brush head 11, each with a narrow side 12 and 13, there are two flexible bristles occupied tongues 14 and 15 hinged. The tongues 14 and 15 are inside the rigid, bristled occupied brush head 11 arranged. The brush head 11 is with bristle tufts longitudinal rows 16 and the Tongues 14 and 15 have a longitudinal row 17 of tufts of bristles. The bristles of the longitudinal row of bristle tufts 17 are longer than the bristles of rows 16 so that they can be inserted into the spaces between the Reach in teeth. The bristles of rows 16 are made of a more flexible material than the bristles the row 17, so that damage to the gum tissue is avoided.

The handle 10, the rigid, bristled brush head 11, the tongues 14 and 15 and the hinge points on the tongue narrow sides 12 and 13 are preferably made and made in one piece made of an elastic material such as polyoxymethylene, the handle 10 and the bristle-bearing Parts 11, 14 and 15 of the brush head essentially

709 508/18

Claims (1)

are rigid, while the hinge points at 12 and 13 are flexible. The longitudinal row of bristle tufts 17 acts independently of the longitudinal rows of bristle tufts 16. The resiliently arranged, bristle-carrying tongues 14 , 15 cooperate in such a way that their tufts of bristles adapt to the teeth, which have a generally convex or concave surface shape. If z. For example, if the tufts of bristles of the tongue 14 are directed inwards and consequently press the tongue 14 down, the tufts of bristles of the tongue 15 can move freely outward when in contact with the teeth and therefore penetrate the cavities between the teeth. The brush head can be manufactured as a pressed part or as a block with slots between the tongues can be sawn out afterwards. The slot between the bristle sections also makes cleaning easier the toothbrush and thereby contributes to increased hygiene. Claim: Toothbrush whose brush head is occupied with three parallel rows of bristle tufts and in which part of the bristle tufts is attached to a tongue which is hinged to the brush head and can be swiveled out of the brush head plane, characterized in that the middle row of bristle tufts (17) is arranged on two tongues (14,15) is articulated with a narrow side (12, 13) at one end of the brush head (11) and can be pivoted independently of one another, the bristles of the middle longitudinal row of bristle tufts (17) having a greater length than the bristles of the two outer longitudinal rows of bristle tufts (16, 16). Considered publications:
French Patent No. 707 727;
U.S. Patent No. 2,266,195. 1 sheet of drawings 709 508/18 1.67 Θ Bundesdruckelei Berlin