FR2825016A1 - ACTIVE HEAD FOR ROTARY TOOTHBRUSH - Google Patents

Abstract

The invention concerns a support (1) for counterrotating parallel cylindrical tufts to ensure constant pressure on the tooth whatever the type of teeth involved, comprising a device equipped with four articulated arms (1, 2 and 4) provided with a probe system which controls via a deformable link bar (4) the rotating movement of the arms (2) bearing the tufts (10).

Description

causing the tip (2) to tilt out of the plane of said legs (24).

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  The present invention relates to a device allowing the user to increase the efficiency of dental brushing for toothbrushes having a double rotary system which has been the subject

  of a patent invention PR 94/11538.

  The principle of the patent mentioned above is based on the self-adaptability of two counter-rotating cylindrical brushes

brushing in the gum tooth direction.

  So we have a passive system for the user at the level

gums and teeth.

  in this case, the brushing pressure is the result of the speed of rotation of the brushes, the hardness and the number of bristles, as well as the elasticity and the resilience

arms of the body.

  The present invention aims to increase the brushing pressure when the user feels the need. So we are improving the existing system with an active system. It should be noted that the posterior teeth are wider and less

taller than the front teeth.

  The pressure being greater on the wide tooth than on the narrow tooth, the brushing will therefore be different from one tooth to another all the more that the speed of rotation can vary according to the resistant torque: the torque increases ^ t when the pressure on the tooth increases, this leads to a decrease in the

brush rotation speed.

  To try to solve this difficulty we note the patent application PR 2662598 which describes a brushing device which also comprises two cylindrical brushes contra-rotating with rigid axes whose spacing is adjustable under the pressure of the brushes on the tooth thanks to a device for cables and springs but still has the same drawback, namely a variable pressure depending on the teeth encountered.

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  The device of the present invention aims to solve these variable pressure problems and therefore to remedy

  to the drawbacks noted in the devices known to date.

  Said brush holder makes it possible to effectively brush the different teeth of the jaw of the same user by constant pressure. The molars are wide and low while the incisors and canines are narrow and

high.

  The device in the so-called rest position makes it possible to brush the molars and premolars at a constant pressure defined subsequently according to the brushing efficiency criteria verified in clinical tests. in the case of brushing the canines and incisors, the support makes it possible to meet the apex of the longer tooth by a small abutment which brings about, by a macanic connection, the bringing together of the brushes so as to reduce the spacing allowing effective brushing to the same pressure as in the brushing phase of the molars and

premolars.

  The user can also intervene directly on the brushing efficiency parameters by varying the pressure by a vertical force on the occlusal face of the tooth which causes a reduction in the entriax of the brushes.

cylindrical.

  Said invention also has the advantages cited in patent FR 94 / I1538 in terms of interchangeability,

operation and use.

  The description and the attached drawings are given as

  example and show the non-limiting aspect of the shapes and

  systems for realizing the object of the invention.

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  1 In a particularly advantageous manner, the device according to the invention comprises a support (1) of counter-rotating parallel cylindrical toothbrushes to ensure constant pressure on the tooth whatever the type of teeth encountered, characterized in that it has a device fitted of four articulated arms (2) and provided with a sensor system which controls pGr through a link bar

  deformable the rotational movement of the arms (2.

  preferably the arms (2) are provided with an articulation point created by a zone of reduced thickness forming a hinge (3). An elastic link (4) deformable in flexion without elongation allows the rotational movement of the arms (2)

around the hinge (3).

  In addition, the connection (4) has a zone of less thickness at the two ends and at its center permitting bending.

  of this without deformation of the arms controlled in rotation.

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Claims (1)

CLAIMS 1 1) 5 support () of parallel cylindrical toothbrushes counter-rotating to ensure constant pressure on the tooth regardless of the type of teeth recentrces characterized in that it incorporates a device equipped with four arms (2) articulated and provided with a system probe which controls via a deformable link IbGrre the rotational movement of the arms t2).   1 215upport selan claim 1 characterized in that the aces (2) are provided with a hinge point created by a   ::: zone of lesser thickness forming a hinge (3).   3) Support according to claim 1 characterized in that an elastic connection (4) deformable in flexion without elongation allows the rotational movement of the arms (2) around the hinge (3).   45support according to claim 3 characterized in that the link (4) includes an area of reduced thickness at the two ends and in its center allowing a f the <ion of