WO2011044858A1

WO2011044858A1 - Rotary head of electric toothbrush

Info

Publication number: WO2011044858A1
Application number: PCT/CZ2009/000121
Authority: WO
Inventors: Řehka LADISLAV
Original assignee: Ladislav Rehka
Priority date: 2009-10-15
Filing date: 2009-10-15
Publication date: 2011-04-21

Abstract

Proposed toothbrush head meets the needs of proper cleaning of teeth recommended by dentists. Brush head displayed on Fig. 3 is made up of shaft (5), in the section (6) of the shaft (5) the bristles (4) are perpendicularly attached to the shaft (5), the bristles (4) are protected on one side by cover (1) and the section (6) with bristles (4) is gyrated. The shaft (5) is placed in the middle of casing (2) embedded into bearings (7) that supports the shaft (5) and is connected by the conjunction (8) located in the neck (3) at the opposite end of the shaft (5) than the bristles (4), with a drive which allows both bi-directional free rotation (A) of the shaft (5) and its movement in the shaft axis by linear direction shift (B).

Description

Rotary head of electric toothbrush

Technical Field

The technical solution relates to a rotary head of an electric toothbrush, which has a major impact on dental cleaning and protection against mechanical damage caused by conventional toothbrushes and currently available electric toothbrushes.

Background Art

Currently available electric toothbrush heads are either a part of the vibrating electric toothbrushes, where the position of bristles is stable immobile non-rotating and is perpendicular to the toothbrush head in a vertical and horizontal position, or are separate and the head rotates perpendicular to the axis of the toothbrush body. The technique of brushing the teeth consists of the manual movement of the hand or spinning round piece with bristles that are placed perpendicular to the horizontal and vertical position of the body of electric toothbrush with ^' an electric motor. By the above method the cleaning is performed by rotating in circular motion on the teeth surface, which, according to dentists is not good for the gums health, because such cleaning can cause tooth neck denudation, gingivitis, and may lead to their permanent breach. Also, when using the current brush the wrong way, it can lead to the same health complications as the use of the above-described electric toothbrushes. Disclosure of the invention

The main purpose of the proposed rotary head of an electric toothbrush is a fulfillment of conditions for correct teeth cleaning that is recommended by dentists to maintain the health of teeth and gums. Principle and the uniqueness of this solution lie in the fact that the rotating brush cleans the teeth by moving from the gums towards the tip of the tooth. Such method of cleaning is ensured by rotating bristles that rotate in the brush head in an upright position on the axis of rotation at an angle of three hundred and sixty degrees in both directions of rotation and ensures proper cleaning of the outer and inner side of teeth. Also the efficiency of cleaning interdental spaces is increased. During the cleaning, it is possible to use both directions of rotation of the toothbrush head with regard to the part of teeth, which is cleaned. Simulating the effect of impact drill, it is also possible to use the axial movement of the shaft of the rotary head. Due to this feature, the cleaning time is reduced and cleaning is more effective. Brush head comprise the shaft that is covered on one end by perpendicularly attached bristles protected by cover from back side of the head. Cover is here in order to avoid unwanted contact of bristles with the oral cavity. In this part the shaft is gyrated, allowing a gradual purification from side to side, like the movement of the spindle. The spiral shape of this part of shaft is given by ordinary method of manufacture of cylindrical brushes. The shaft is situated in the middle of casing embedded into bearings that supports the shaft and is connected by its conjunction located in neck at the opposite end of the shaft than the bristles, with a drive which allows bi-directional free rotation and movement in the shaft axis, where the rotations are infinitely variable and changeable in both directions. The range of the shaft is limited by the size of the cover. The speed of the axial rotation is continuously changeable. Brief Description of Drawings

Technical solution is explained by drawing on which Figure 1 shows a side view of the toothbrush head and bristles position. Fig. 2 illustrates a frontal view of the toothbrush head.

Fig. 3 is a cross-section showing the fitting of toothbrush head shaft .

Example of Embodiment

Dental cleaning is performed by the movement of toothbrush head with rotating bristles, preferably in a horizontal position against the teeth, and by changing the position from the front teeth to the rear and vice versa. This method shortens the treatment time necessary to properly clean the teeth and increases its effectiveness in relation to existing methods of cleaning. Proposed toothbrush head meets the needs of proper cleaning of teeth recommended by dentists. Brush head is made up of shaft 5_, in the section 6_ of the shaft 5_ the bristles _4 are perpendicularly attached to the shaft 5_, the bristles 4_ are protected on one side by cover 1 and the section 6 with bristles _4 is gyrated. The shaft _5 is placed in the middle of casing 2 embedded into bearings 1_ that supports the shaft _5 and is connected by the conjunction _8 located in the neck 3_ at the opposite end of the shaft 5_ than the bristles 4_, with a drive which allows both bi-directional free rotations A of the shaft .5 and its movement in the shaft axis by linear direction shift B. The range of the shift B is limited by the size of the cover 1_. The speed of the axial rotation B is continuously changeable.

Industrial Utilization

The technical solution is applicable in dental hygiene for daily cleaning of the gums, teeth and interdental spaces. List of Reference Marks

1 - cover;

2 - casing;

3 - neck;

4 - bristles;

5 - shaft;

6 - section of shaft with bristles;

7 - bearings;

8 - conjunction of the shaft with drive;

A - bi-directional rotations;

B - linear shift.

Claims

PATENT Claims

1. Rotary head of electric toothbrush comprising the casing (2) and a shaft (5) with bristles (4) partially protected from side by a cover (1) , characterized by that the shaft (5) is pivoted in bearings (7) allowing the shaft (5) free continual axial rotations (A), where shaft with bristles (4) is circumgyratable .

2. Rotary head according to claim 1, characterized by that the shaft (5) is created as linearly shifted (B) in both directions of its axis and the range of the shift (B) is limited by the size of shaft (5) cover (1) .

3. Rotary head according to claim 1, characterized by that axial rotations (A) of the shaft (5) in bearings (7) are infinitely variable and changeable in both directions of rotations (A) .

4. Rotary head according to any of claims 1 and 3, characterized by that the speed of shaft (5) rotation (A) is continuously changeable .