FIELD OF THE INVENTION The here disclosed invention relates to dental care, and more precisely to the cleaning of interdental spaces with particular interdental brushes, adapted to electrical toothbrushes -the vibrations of which are transformed into a seesaw movement.

PROBLEM TO BE SOLVED

Electrical toothbrushes are quite common today and offer good cleanig results. However, interdental care hitherto cannot be provided with it.

Experiments with combinations of interdental brushes and electrical appliances showed negative effects when vibrating between teeth, where the common interdental brushes with their tapered shape and mostly rotational movement tend to carve in and hurt the gingivae.

Tests with differently shaped brushes (particularly small, cylindrical ones) showed some improvement, but at the cost of poorer cleaning or more time and effort for it.

INVENTIVE STEP

It was found, that these negative effects disappear, as soon as the brushing movement is ex- ecuted in primarily one direction, i .e. a seesaw movement. However, electrical toothbrushes usually work on a vibration, which originate from an eccentric motion of a tappet on an small electrical motor and therefore is quite undefined and largely circular.

The task of transforming this into a seesaw movement with low complexity in the device was accomplished by integrating a tubing or key way into the brushes head, wherein a heavy metal ball is bound to a monovariant movement to front and back and, tuned to resonance with the rotational speed, thus amplifies the movement of the plastic boom, on which the brush is mounted.

GENERAL DESCRIPTION AND BASIC EMBODIMENT

The present invention is based on the vibrational motion of common models of electrical toothbrushes, but transforms the swinging, rather rotational movement of its head into a seesaw motion.

This is accomplished through the motion of a roller ball, that is led in a key way or within a tube fixed in forward direction to the vibrating lever of the toothbrush, closely under a interdental brush, that replaces the ordinary toothbrush. Said roller ball— together with its guides and spring-type or rubber bumpers at the end- is tuned to have a resonance frequency according to the rotational speed of the toothbrush's eccentric tappet. This way the eccentric movement is largely tuned into a seesaw motion, which is basic for interdental care.

Fixing the interdental brush can be done the same way these are fastened in common handles for manual treatment, wherefore different systems are on the market.

DESCRIPTION OF THE DRAWINGS

Fig. 1 demonstrates the general assembly, comprising the exciter 1 as part of standard electri- cal toothbrushes, which fits into the particular adapter 2 (to the different maker's brand). Said adapter 2 is part of the plastic lever 3 , the tip of which contains another fastener 4 for interdental brushes 5. Preferably a little below said fastener 4 a tube or key way 6 is implemented in length direction, containing a ball of high density 7, that -on vibration 8 of the lever 3 -is forced into an oscillating movement 9, that re-transmits and at resonance frequency amplifies the motion to the lever 3 and thus the interdental brush 5.