Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
  • A61C17/16—Power-driven cleaning or polishing devices
  • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
  • A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
  • A61C17/34—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
  • A61C17/3409—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor characterized by the movement of the brush body
  • A61C17/3436—Rotation around the axis perpendicular to the plane defined by the bristle holder
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
  • A61C17/16—Power-driven cleaning or polishing devices
  • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
  • A61C17/24—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like rotating continuously
  • A61C17/26—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like rotating continuously driven by electric motor
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
  • A61C17/16—Power-driven cleaning or polishing devices
  • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
  • A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
  • A61C17/34—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
  • A61C17/3409—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor characterized by the movement of the brush body
  • A61C17/3472—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor characterized by the movement of the brush body with combined movements of the brush body
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
  • A61C17/16—Power-driven cleaning or polishing devices
  • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
  • A61C17/40—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like orbiting, e.g. nutating
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
  • A61C17/16—Power-driven cleaning or polishing devices
  • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
  • A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
  • A61C17/34—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
  • A61C17/3409—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor characterized by the movement of the brush body
  • A61C17/3418—Rotation around the axis of the toothbrush handle
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
  • A61C17/16—Power-driven cleaning or polishing devices
  • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
  • A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
  • A61C17/34—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
  • A61C17/3409—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor characterized by the movement of the brush body
  • A61C17/3463—Translation along the axis perpendicular to the plane defined by the bristle holder

Definitions

• the invention relates to a toothbrush with a brush head according to the preamble of claim 1.
• Such toothbrushes are commercially available in large numbers and in different versions. They are provided with a brush head which can generally be replaced and which has a largely rotationally symmetrical brush body that receives the bristles or bristle tufts.
• the brush body is mounted rotatably about an axis of rotation in a housing section coupled to the housing of the toothbrush and is driven by an electric motor.
• Such a drive is described for example in WO 91/07116.
• eccentric drives that drive the brush body in a reversing manner have found widespread use.
• the brush body executes a rotational movement alternately pointing in both directions of rotation with a rotation angle which can be, for example, 130 °.
• Such eccentric drives are u. a. known from US 4,845,795, US 5,504,959 or US 5,617,601.
• toothbrushes of this type pose major problems in terms of production technology owing to their complicated construction.
• the present invention was therefore based on the object of providing a toothbrush of the type mentioned at the outset which enables an improved cleaning action compared to the previously known toothbrushes with a rotating drive and is of simple design.
• the invention is based on the idea of superimposing an additional swiveling movement on the reversing rotational movement.
• the bristles picked up by the brush body are pressed pulsating against the tooth surface at a high frequency.
• the brush body is not only rotatable on a housing section, but is additionally pivotally mounted on the housing section.
• a driver pin of the eccentric drive engages on the brush body to produce the swivel movement superimposed on the rotational movement and acts in the circumferential and axial directions.
• the invention provides, in a second embodiment variant for generating the swiveling movement superimposed on the rotational movement, that a bearing journal attached to the housing section of the housing of the toothbrush is operatively engaged with the brush body with the circumferential direction and the axial direction.
• a third preferred embodiment variant provides that the eccentric drive has an eccentric shaft which rotates in one direction and which is arranged orthogonally to the axis of rotation of the bristle carrier and centrally penetrating the brush body. It is provided that this rotating eccentric shaft carries the driver pin on the end face. In this way, a mechanically simple and low-wear drive can be implemented. The space requirement is also extremely small, so that a slim and compact structure of the housing can be achieved.
• a fourth preferred embodiment provides that the brush body performs a tilting movement that rotates with the rotary movement.
• the brush body on one Be supported journal, which is axially projecting attached to a housing portion of the housing.
• the brush body has an axially inwardly facing, conical recess on its end facing away from the bristles.
• the bearing journal thus supports the brush body in the axial direction.
• the cone shape of the recess allows the pivoting movement generated by the eccentric, the cone angle having to be dimensioned at least so large that an unobstructed pivoting movement can be carried out. In this way it is ensured that the bearing journal can absorb the axial forces occurring in every angular position of the brush body.
• a particularly simple implementation of the sequence of movements of the rotating eccentric shaft on the brush head is obtained if the brush body has a radially inward-pointing conical recess, through which the driver pin of the eccentric shaft is inserted directly.
• the axes of rotation of the brush body and the eccentric shaft intersect orthogonally.
• a fifth embodiment provides for the swiveling or tilting movement of the brush body not to run around, but rather to run around a defined axis. In this way, for example, an oscillating linear movement can be combined with the reversing rotary movement.
• the brush body is only articulated during certain angular sectors of the circulation of the driving pin.
• the longitudinal extent of the guide groove thus determines the deflection of the brush body. pers m axial direction.
• the guide groove can be formed directly in the area of the peripheral surface of the brush body. There are a number of possible ways of doing this, as will be explained in the following.
• the guide groove is formed directly in the bristle carrier.
• the driver pin engages directly in this guide groove and can be moved between a front and a rear reversal point hm and fro, so that a force transmission takes place via the sides of the guide groove running in the axial direction and the bristle carrier can be driven reversibly.
• This variant manages with a small number of movable individual components, is therefore low-noise and particularly suitable for high-frequency applications, so-called snow-running toothbrushes.
• the guide groove is part of a link stem which is inserted into the brush body.
• the backdrop system can be pushed directly or by means of a support m into an axially extending recess in the brush body e, as a result of which the assembly can be carried out comparatively simply and inexpensively.
• the backdrop system has the advantage over a directly inserted groove that it can be replaced in the event of wear. In particular, this enables a free choice of material regardless of the material of the brush body, so that an optimal design that is tailored to the wear behavior is possible.
• a sliding block m to be axially displaceably m of the guide groove, the sliding block having a driver bore m which the driver pin engages.
• the latter variants have in common that the link stem and the corresponding recess or guide groove on the bristle carrier are designed in such a way that a rotational or pivoting movement of the link stem opposite to the rotational movement of the bristle body is possible, so that the driver pin engaging therein is not exposed to any bending stress.
• the backdrop elements e are generally cylindrical for this purpose, which results in a secure mounting of the recess or guide groove.
• a preferred variant provides for the backdrop star to be spherical. This has the advantage that the frictional forces occurring between the link system and the recess or the guide groove are minimal.
• the above-mentioned pivot or tilt axis is determined, for example, by two radially projecting bearing pins attached to the housing section of the brush head. These engage m corresponding bearing grooves, which are located in the circumferential direction on the brush body.
• a circumferential bearing groove can be provided; it is also possible to provide only bearing grooves which are limited in the circumferential direction and are assigned to the respective bearing journal. The extent in the circumferential direction must be selected so large that the rotational movement of the brush body can be carried out unimpeded.
• a mechanically particularly simple structure for generating a Pivotal movement can be realized according to the invention in that the brush body has a bearing groove which is arranged opposite the eccentric shaft and which, along a circumferential section and in the axial direction, is arranged on the brush body in a substantially V-shaped or U-shaped manner with respect to the plane of symmetry of the brush body, and in that Housing section at least one bearing pin is attached, the m this bearing groove is in engagement.
• the invention further provides for the cleaning effect of such a toothbrush to be further increased by additionally forcing the brush head to move up and down in the reversing rotational movement and the positively guided pivoting movement. Such a movement approximates a wobble movement.
• an up and down movement of the brush head necessary for this wobble movement is generated in that the bristle carrier is mounted axially displaceably on the housing section and has at least one bearing groove which is attached to the bristle carrier along a circumferential section and in the axial direction, at least one bearing journal on the housing section is attached, the m is the bearing groove in engagement.
• Such an axial displacement of the bristle carrier is thus caused by the fact that it performs the corresponding movement of the driver pin between the two reversal points in the axial direction.
• FIG. 1 shows a brush head according to a first embodiment in axial section, brush body in a first position
• FIG. 5 shows the brush head according to FIG. 4, top view.
• FIG. 6 shows a brush head according to a third embodiment ("wobble head brush"), a) view from below, b) view from the right, c) front view, d) sectional view along AA,
• FIG. 7 shows a brush head according to a fourth embodiment ("wobble head"), a) view from below, b) view from the right, c) view from the front, d) sectional view along A-A,
• FIG. 9 is a toothbrush with the brush head according to FIG. 6 m exploded view
• FIG. 11 shows an axial bearing journal for the brush head according to FIGS. 6 and 7,
• FIG. 13 shows a sectional illustration of a drive according to a sixth embodiment variant
• FIG. 14 shows a sectional illustration of a drive according to a seventh embodiment variant
• a brush head 1 has a brush body 10, on the front side of which a bristle holder 20 provided with bristles 22 t - 1 ->
• a brush head 100 with a brush body 110.
• a bristle carrier 120 which receives bristles 122, is attached to the end of the brush body 110.
• a conical axial recess 114 by means of which the brush body 110 is supported on a bearing journal 34, which is attached to a housing section 30 in a vertically projecting manner.
• a receiving opening 124 is provided on the brush body 110, into which a sliding block 130 fastened to a carrier 134 is inserted.
• the sliding block 130 is provided with a guide groove 132, in which the driver pin 52 engages. This results in the following sequence of movements:
• the bearing body 38 allows the brush body 110 to be pivoted only about the axis G fixed to the housing in the plane shown in FIG. 4, but not in the sectional plane represented by FIG. 5.
• the brush body 110 In the case of a full revolution U of the eccentric shaft 50, the brush body 110 is displaced from the position shown in FIG. pivoted position brought to finally return to the starting position m according to FIG. 4. So there is only a pivoting movement about an axis orthogonal to the plane of the page.
• the brush body 110 is alternately moved by the contact of the driver pin 52 at the respective end of the guide groove 132, so that the longitudinal extension of the guide groove 132 m in connection with the positioning of the driver pin 52 m with respect to the eccentric shaft 50 means the maximum possible displacement path and thus the tilt angle K , pretends.
• FIGS. 6 and 8 to 11 The third embodiment of the toothbrush according to the invention is shown by FIGS. 6 and 8 to 11.
• such a brush head 200 has a brush body 210 to which a bristle carrier 220 provided with bristles is attached.
• a bristle carrier 220 provided with bristles is attached.
• the bristles are not shown in the drawing.
• the brush body 210 has on its end face 212 an inwardly directed recess 214 which runs in the axial direction and which opens out into a cone 215, the cone 215 adjoining the inwardly extending cavity 213 in the axial direction.
• bearing grooves in the example referred to as bearing groove of the second type 217 and bearing groove of the third type 219, are formed.
• the bearing groove of the second type 217 is arranged opposite a guide groove 232.
• Two third type 219 bearing grooves - also in an opposing arrangement - are installed at the measuring level.
• the course of the second type of bearing groove 217 is essentially U-shaped, the two legs of the U-shape being arranged mirror-symmetrically with respect to the mirror specified above - plane of symmetry.
• the third type of bearing grooves 219 likewise run along a circumferential section and are attached to the bristle carrier at an inclination in the axial direction.
• FIG. 7 shows a brush head according to a fourth embodiment variant, with FIGS. 8, 9, 10 and 11 being used analogously to the third embodiment variant as representations of the toothbrush according to the invention.
• the brush head 300 according to FIG. 7 has the following features of the brush head 200 according to FIG. 6 m:
• the brush head 300 has a brush body 310, the end face 312 of which has an axial recess 314. This axial recess 314 m merges into a cone 315, which finally opens into a cavity 313.
• the peripheral surface 316 of the brush body 310 like the brush head 200 of the previous exemplary embodiment, has a bearing groove of the second type 317 and two bearing grooves of the third type 319. The third type of bearing grooves 319 are in turn arranged in an opposing arrangement and the second type of bearing groove 317 is located opposite a guide groove 332.
• the bristle carrier 320 attached to the brush body 310 is again shown without bristles for the sake of clarity.
• the course of the bearing groove of the second type 317 m of the circumferential surface 316 of the brush body 310 is U-shaped.
• the third type of bearing grooves 309 are inclined in the axial direction, as in the previous example, but, unlike in the previous example, example, the inclination angle changes in the circumferential direction.
• FIG. 8 shows the brush head according to a third embodiment variant in a perspective view. 8 shows the features described below:
• the brush head 400 is based on a brush body 410, a bristle carrier 420 seated on the brush body 410, which is provided with bristles 422.
• the brush body 410 has a substantially cylindrical shape with an approximately elliptical base area.
• the end face 412 of the brush body 410 has a recess 414 in the axial direction, which is cylindrical in the example. This cylindrical axial recess 414 tapers inwards.
• This cone is provided with the reference number 415. This cone 415 is followed by a cavity 413.
• the “narrow sides” of the cylindrical brush body 410 with an elliptical base area have a guide groove 432 in the opposite arrangement and a bearing groove of the second type 417, which is only indicated here.
• the guide groove 432 is designed as an inwardly tapering receiving opening 424 and an inwardly expanded cavity 426 adjoining this receiving opening 424.
• the "long sides" of the cylindrical brush body 410 likewise have two bearing grooves of the third type 419 of the embodiment described above in the arrangement opposite one another.
• the bearing grooves of the second and third types 417 and 419 are molded in the example of the cylindrical brush body in such a way that they extend into the cavity 413, which adjoins the cone 415 and thus the axial recess 414.
• FIG. 9 shows such a toothbrush to demonstrate how such a brush head according to FIG. 6 or according to FIG. 7 m the housing of a toothbrush is used ) to H
• Eccentric shaft 650 according to Fig. 6 m longitudinal sectional view.
• the plane of mirror symmetry of the toothbrush 601 is selected as the cutting plane.
• the kinematics of the third variant and the kinematics of the fourth variant, as shown in FIGS. 6 to 10, are essentially identical. The following three movements are superimposed to generate a wobble movement of the brush head of the electric payment brush:
• the reversing rotational movement is brought about by the fact that the driving pin 552 and 652, which engages the axial recess 214, 314, 414, is moved back and forth between two reversal points owing to the rotational movement of the eccentric shaft 550 or 650.
• the axial recess 214, 314, 414 is expanded in the axial direction in such a way that, owing to the rotational movement of the eccentric shaft 550, 650, only a force transmission and thus a reversing rotational movement perpendicular to the axis of rotation takes place.
• the pivoting movement of the brush head 200, 300, 400, 500, 600 is generated in that the reversing rotational movement due to the drive of the eccentric shaft by the Bearing groove of the second type 217, 317, 417 engaging radially arranged bearing journal 564 or 664 is positively guided. Because of the radial bearing journal 564 or 664 running in the second type of groove 217, 317 or 417, the brush head executes a tilting movement about an axis lying m of the mirror symmetry plane of the brush head.
• An up and down movement of the brush head 200, 300, 400, 500, 600 is generated in that two bearing journals 566 m, which are arranged in the radial direction and are mirror-symmetrical to the above-mentioned mirror symmetry plane, correspond to bearing grooves axially inclined in the brush body 210, 310, 410 m circumferential direction Intervene types 219, 319 and 419 during the reversing rotational movement.
• the stroke or up and down movement of the brush head is more or less strong.
• an up and down movement independent of the angle of rotation takes place.
• the brush head according to the fourth embodiment variant due to the inclination angle increasing in one direction, there is a stroke which is dependent on the angle of rotation during the reversing rotational movement. Specifically, for the present case, this means that when the brush head turns to the left, the brush head initially moves very strongly upwards from the right stop and the second half of the rotation only makes a slight stroke movement.
• an axial journal 768 as shown in FIG. 11. It essentially consists of a cylindrical body 774, a cylindrical neck 772 seated on the cylindrical body 774 with a reduced cross-sectional area compared to the body 774, and an essentially spherical head 770 seated on the cylindrical neck 772.
• the fuselage 774 is intended to be inserted into a bore made in the housing section 662 or 562.
• the dimensions of the head 770 are selected such that it m m the cavity shown in FIG. 6 and FIG. 7
• the length of the neck 772 of the axial bearing journal 768 is selected such that the radial bearing journals 566 engaging due to the guidance of the m third-type bearing grooves 219, 319 and 419, respectively
• FIGS. 12 to 14 show sectional representations of different drives according to further embodiments.
• these figures are intended to show how a reversing rotational movement from a rotating tion movement of the eccentric shaft can be implemented.
• toothbrush 801 first shows how a reversing rotational movement can be generated with the aid of a sliding block inserted in a guide groove on the brush body.
• the toothbrush 801 consists of a grip part 880 with a plug-on housing 860 with a brush head 800.
• a motor 890 is arranged in the grip part 880, which is connected via a corresponding gear to an eccentric shaft 850 which is guided within the housing 860.
• the housing 860 has a housing section 862 in the front section thereof, with which the brush head 800 can be inserted.
• the brush head 800 is movably supported by means of an axial bearing journal 868 and a radial bearing journal 864 m in the housing section 862 m in the manner described above.
• the bristle carrier 820 now has a guide groove 832 in which the link star 830 is axially displaceably received.
• E Driver pin 852 of the eccentric shaft 850 engages in a driver bore 836 on the link stem 830 em.
• the link star 830 is forcibly coupled to the driver pin 852 and is movable within the guide groove 832 between two reversal points hm and fro.
• the driver bore 836 receives the driver pin 852 largely without play, a largely unimpeded relative movement of the driver pin 852 m in the height direction and in the direction of rotation being realized in order to minimize friction losses.
• the driver pin 852 m of the selected sectional representation is at the left reversal point.
• the link stem 930 has a driver bore 936 into which a driver pin 952 engages on the eccentric shaft 950.
• the basic structure corresponds to the embodiment variant described in connection with FIG. 12.
• the only difference is that the sliding block 930 is spherical.
• a brush body 1010 with a bristle carrier 1020 is shown forming a brush head 1000.
• the bristle carrier 1020 with the bristles 1022 is, as in the previous exemplary embodiments, rotatably (and longitudinally displaceable) supported with the aid of the bearing journal cooperating with the axial recess 1014.
• the axial recess 1014 as already described in detail above, consists of the cone 1015 and the adjoining cavity 1013.
• a forced movement of the brush head 1000 in the housing section 1060 is due to the radial bearing journal 1064 engaging in a bearing groove 1017 represented.
• the basic structure corresponds to the design variants described in connection with FIGS. 12 and 13.
• the eccentric pin 1052 moves freely in this guide groove due to the motor drive of the eccentric shaft 1050 t M h- 1 h- 1
• brush head 10 brush body 12 end face 14 axial recess 16 peripheral surface 18 bearing groove of the first type 20 bristle carrier 22 bristle 24 receiving opening 30 sliding block 32 guide groove 34 carrier
• eccentric shaft 552 drive journal 560 housing 562 housing section receiving the brush head 564 radial bearing journal 566 radial bearing journal 568 axial bearing journal

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• Health & Medical Sciences (AREA)
• Dentistry (AREA)
• Epidemiology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Brushes (AREA)
• Transmission Devices (AREA)
• Pivots And Pivotal Connections (AREA)

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• 2000
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