Brushing – scrubbing – and general cleaning – Machines – Brushing
Patent
1999-03-16
2000-07-25
Till, Terrence R.
Brushing, scrubbing, and general cleaning
Machines
Brushing
15 28, A61C 1734
Patent
active
060922524
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a motor-driven toothbrush, in particular an electric toothbrush, as one wherein the brush head partakes of an arcuate rotary-like motion, with the brush head angled to the normal axis of the elongated housing or handle to which it is connected.
A toothbrush of this type is known, for example, from DE-U-295 20 230.0. In the case of this toothbrush, a housing head part, which receives a rotatable bristle carrier, is fixedly connected to a housing part which receives a drive shaft arranged at right angles to the axis of rotation of the bristle carrier.
BRIEF SUMMARY OF THE INVENTION
The object of the present invention is to provide a toothbrush of the type mentioned in the introduction by means of which a better cleaning action can be achieved.
This object is achieved according to the invention by a toothbrush having the features of a brush head which is flexible and tiltable with respect to the axis of the toothbrush housing or handle adjacent the brush head.
Since the housing has a flexing zone and is subdivided by the latter into two housing parts, which can be deflected elastically with respect to one another, with the result that, with forces acting in the direction of the brushing surface, the brush head, which remains in a drive connection, can be forced back or pivoted elastically, use of the toothbrush results in better abutment of the cleaning-action, brushing surface and in an optimum contact pressure.
Preferred developments of the toothbrush are seen in the attached drawings. The invention embraces more than one embodiment as seen in the drawings and described hereinafter.
BRIEF DESCRIPTION OF THE DRAWINGS
An exemplary embodiment of the toothbrush according to the invention is described in more detail hereinbelow and is illustrated in the drawing, in which, purely schematically:
FIG. 1 shows a view of a first exemplary embodiment of a plug-on part of an electric toothbrush;
FIG. 2 shows the longitudinal section of the plug-on part according to FIG. 1 in a normal position;
FIG. 3 shows the longitudinal section of the plug-on part according to FIG. 1 in a deflected position;
FIG. 4 shows a view of a second exemplary embodiment of a plug-on part of an electric toothbrush in the normal position, which corresponds to FIG. 2;
FIG. 5 shows a view of a third exemplary embodiment of a plug-on part of an electric toothbrush in the normal position, which corresponds to FIG. 2; and
FIG. 6 shows a view of a fourth exemplary embodiment of a plug-on part of an electric toothbrush in the normal position, which corresponds to FIG. 2 .
DETAILED DESCRIPTION OF THE INVENTION
According to FIGS. 1 to 3, a plug-on part 1 for an electric toothbrush has a housing 2 which comprises a rear housing part 3, which can be plugged onto a handle part (not illustrated in the drawing), and a front housing part 4. A brush head 5 is mounted in the front housing part 4 in a rotatable manner, said brush head being driven by an electric motor (not illustrated in the drawing) by means of a transmission device 7, which is accommodated in a cavity 6 of the housing 2 and of which only part can be seen in FIGS. 2 and 3. The brush head 5 is imparted an alternating rotary movement or rotary oscillation, it being possible for the angle-of-rotation range to be adjusted. Such a toothbrush and such a transmission device form the subject matter of DE-U-295 20 230.0; the transmission device 7 is thus not itself described in detail hereinbelow. A drive shaft of the transmission device 7 is designated by 8, and the drive axis by A, in FIGS. 2 and 3. The brush-head axis is provided with the designation B.
The brush head 5 has a bristle carrier 10 with projecting bristles 11. The free ends of the bristles 11 form a brushing surface 12. As an example, a concave brushing surface 12 which is concentric to the brushhead axis B is illustrated.
As can be seen from FIGS. 2 and 3, the bristle carrier 10 is connected in the manner of a snap-action connection to a rotary plate 15, which is mounted in
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Fischer Franz
Pfenniger Philipp
Till Terrence R.
Trisa Burstenfabrik AG Triengen
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