WO1996038100A1 - Electric toothbrush - Google Patents

Electric toothbrush Download PDF

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Publication number
WO1996038100A1
WO1996038100A1 PCT/EP1996/002372 EP9602372W WO9638100A1 WO 1996038100 A1 WO1996038100 A1 WO 1996038100A1 EP 9602372 W EP9602372 W EP 9602372W WO 9638100 A1 WO9638100 A1 WO 9638100A1
Authority
WO
WIPO (PCT)
Prior art keywords
toothbrush
motor shaft
gear
axis
fork
Prior art date
Application number
PCT/EP1996/002372
Other languages
German (de)
French (fr)
Inventor
Michael Bigler
Original Assignee
Finalpina Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Finalpina Ag filed Critical Finalpina Ag
Priority to AU62207/96A priority Critical patent/AU6220796A/en
Publication of WO1996038100A1 publication Critical patent/WO1996038100A1/en

Links

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
    • A61C17/3472—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
    • A61C17/32—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
    • A61C17/3445—Translation along the axis of the toothbrush handle

Definitions

  • the invention relates to an electric toothbrush with a toothbrush axis which is rotatably and axially displaceably mounted in a toothbrush housing and which moves from a rotating motor shaft of an electric motor by means of a first gear in a reciprocating movement in the direction of its longitudinal axis and by a second one having an eccentric Gear can be set in a rotating movement oscillating about its longitudinal axis.
  • the first gear has a pinion arranged on the motor shaft, which drives a crown wheel.
  • This crown wheel carries an eccentric which engages in a transverse groove of an arm of a fork attached to the end of the toothbrush axis and thereby produces the back and forth movement of the toothbrush axis which runs in the longitudinal direction of the toothbrush axis.
  • the second gear is provided between the crown wheel and the other arm of the fork and ensures that the eccentric generating the oscillating movement of the toothbrush axis rotates at a substantially lower speed than the eccentric producing the reciprocating movement. It has been shown that such a frequency difference is advantageous for tooth cleaning.
  • the second gear determines the frequency difference between the reciprocating and the oscillating movement of the toothbrush axis. Since the toothbrush according to EP-A-0 628 291 has a frequency difference of approximately 1:30 is aimed for, the second gear must be designed to be relatively complex in order to have the required transmission ratio. For this reason, a double planetary gear was provided in EP-A-0 628 291.
  • DE-B-15 32 804 it is also known in the case of electric toothbrushes to produce a reciprocating movement of the toothbrush axis by means of a cam mechanism.
  • this document does not show a second gear with which it is possible for the toothbrush axis to be able to carry out its oscillating movement with a frequency lower than that of the reciprocating movement.
  • the toothbrush according to DE-B-15 32 804 is designed such that, depending on the position of a switch, the toothbrush axis either performs a reciprocating or an oscillating movement.
  • the invention is based on the problem of designing an electrical toothbrush of the type mentioned at the outset in such a way that a different frequency can be achieved between the pendulum movement and the reciprocating movement of the toothbrush axis with as little effort as possible.
  • This problem is solved according to the invention in that the first gear is a cam mechanism with a circumferential cam provided on the motor shaft, and in that the second gear having the eccentric for driving has a rite also arranged on the motor shaft.
  • Such a toothbrush has only a single gear reducing the frequency of the motor shaft.
  • the stroke cam mechanism ensures that the toothbrush axis executes its reciprocating motion with the relatively high frequency of the revolving motion of the motor shaft, while the second gear reduces this frequency to a lower frequency that is optimal for the pen motion.
  • the frequency difference between the two movements of the toothbrush axis results in the toothbrush according to the invention from the difference between the speed of the motor shaft and the speed of the second eccentric.
  • the frequency difference results from the speed of the crown wheel which is reduced compared to the speed of the motor shaft and the speed of the second eccentric.
  • the second gear must have a much larger transmission ratio than the gear according to the invention, so that the toothbrush according to the invention can be designed much simpler and is correspondingly less expensive to manufacture. It is also advantageous with the toothbrush according to the invention that the toothbrush axis can be designed to be tiltable relative to the housing of the toothbrush.
  • the toothbrush is particularly simple if the second gear has a crown wheel driven by the pinion on which the eccentric is arranged.
  • An electric toothbrush in which the toothbrush axis has a fork pointing towards the electric motor, the eccentric engaging in a longitudinal guide of one arm of the fork, can be further developed into the toothbrush according to the invention in that the other arm of the fork leads over the crown wheel and engages with the stroke curve on the motor shaft.
  • the cam mechanism can also be designed differently.
  • An advantageous embodiment consists in that the stroke curve is formed by a flange which is oriented obliquely to the transverse direction of the motor shaft and that the arm of the fork which engages over the crown wheel engages over this flange with a guide groove.
  • the frequency of the reciprocating movement of the toothbrush axis can be doubled compared to the speed of the motor shaft with simple means if the stroke curve is designed to generate two strokes per revolution of the motor shaft.
  • Fig.l is a perspective view of one for the
  • FIG. 2 shows a side view of a transmission-side end of a motor shaft
  • 3 shows a perspective view of an embodiment of a transmission-side end of the motor shaft that has been modified compared to FIG. 2.
  • FIG. 1 shows a partial area of an electric motor 1 which drives a motor shaft 2.
  • a lifting curve 3 designed as an inclined flange and behind it a pinion 4 are arranged.
  • the pinion 4 drives a crown wheel 5 which is fixed to the housing.
  • a tooth 7 is attached to a toothbrush axis 6 designed to fasten a plug-on brush, not shown, which engages with an arm 8 over the crown wheel 5 and with an arm 9 under the crown wheel 5.
  • a longitudinal guide 10 designed as an elongated hole, into which an eccentric of the crown wheel 5 engages with play. If the crown wheel 5 rotates, then the eccentric 11 performs a circular movement. Since it can only move in the longitudinal direction in the longitudinal guide 10, this circular movement leads to an oscillating movement of the fork 7 and thus also the toothbrush axis 6 about its longitudinal axis.
  • the toothbrush axis 6 can be rotated in the usual manner in the toothbrush housing (not shown) and is additionally axially displaceable.
  • the upper arm 8 of the fork 7 extends beyond the stroke curve 3. It has a guide groove 12 near its motor-side end, with which it engages over the stroke curve 3.
  • the guide groove 12 therefore forms with the lifting curve 3 a first gear 13 designed as a cam gear, while the pinion 4 forms a second gear 14 with the crown gear 5 and the eccentric 11.
  • Figure 2 illustrates the design of the motor shaft 2. It can be seen that the lifting curve 3 by an oblique posed flange is formed. The inclination determines the stroke of the toothbrush axis 6 shown in FIG. 1. The pinion 4 arranged in front of the stroke curve 3 can also be seen in FIG.
  • the stroke curve 3 is designed such that the toothbrush axis 6 shown in FIG. 1 carries out two strokes in the direction of its longitudinal axis per revolution of the motor shaft 2.

Landscapes

  • 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)

Abstract

In an electric toothbrush, a rotary and axially movable toothbrush axis (6) is mounted in a toothbrush housing. The toothbrush axis (6) engages with arms (8, 9) via a contrate gear (5) driven by a pinion (4) of a motor shaft (2). The contrate gear (5) has an eccentric (11) that causes the fork (7) and consequently also the toothbrush axis (6) to oscillate. A simultaneous, reciprocating movement of the toothbrush axis (6) is caused by the fact that the other arm (8) of the fork (7) engages a lifting cam (3) on the motor shaft (2).

Description

O 96/38100 PC17EP96/02372O 96/38100 PC17EP96 / 02372
Beschreibungdescription
Elektrische ZahnbürsteElectric toothbrush
Die Erfindung betrifft eine elektrische Zahnbürste mit einer in einem Zahnbürstengehäuse drehbar und axial ver- schieblich gelagerten Zahnbürstenachse, welche von einer umlaufenden Motorwelle eines Elektromotors mittels eines ersten Getriebes in eine hin- und hergehende Bewegung in Richtung ihrer Längsachse und durch ein zweites, einen Exzenter aufweisendes Getriebe in eine um ihre Längsachse pendelnde Drehbewegung versetzbar ist.The invention relates to an electric toothbrush with a toothbrush axis which is rotatably and axially displaceably mounted in a toothbrush housing and which moves from a rotating motor shaft of an electric motor by means of a first gear in a reciprocating movement in the direction of its longitudinal axis and by a second one having an eccentric Gear can be set in a rotating movement oscillating about its longitudinal axis.
Eine elektrische Zahnbürste der vorstehenden Art ist Ge¬ genstand der EP-A-0 628 291. Bei der in dieser Schrift gezeigten Zahnbürste hat das erste Getriebe ein auf der Motorwelle angeordnetes Ritzel, welches ein Kronenrad an¬ treibt. Dieses Kronenrad trägt einen Exzenter, der in eine quer verlaufende Nut eines Armes einer am Ende der Zahnbürstenachse angebrachten Gabel eingreift und dadurch die in Längsrichtung der Zahnbürstenachse verlaufende, hin- und hergehende Bewegung der Zahnbürstenachse er¬ zeugt. Das zweite Getriebe ist zwischen dem Kronenrad- und dem anderen Arm der Gabel vorgesehen und sorgt dafür, daß der die pendelnde Bewegung der Zahnbürstenachse erzeu¬ gende Exzenter mit einer wesentlich niedrigeren Drehzahl umläuft als der die hin- und hergehende Bewegung erzeu¬ gende Exzenter. Es hat sich gezeigt, daß ein solcher Fre¬ quenzunterschied für die Zahnreinigung vorteilhaft ist.An electric toothbrush of the above type is the subject of EP-A-0 628 291. In the toothbrush shown in this document, the first gear has a pinion arranged on the motor shaft, which drives a crown wheel. This crown wheel carries an eccentric which engages in a transverse groove of an arm of a fork attached to the end of the toothbrush axis and thereby produces the back and forth movement of the toothbrush axis which runs in the longitudinal direction of the toothbrush axis. The second gear is provided between the crown wheel and the other arm of the fork and ensures that the eccentric generating the oscillating movement of the toothbrush axis rotates at a substantially lower speed than the eccentric producing the reciprocating movement. It has been shown that such a frequency difference is advantageous for tooth cleaning.
Bei der elektrischen Zahnbürste nach der genannten EP-A-0 628 291 bestimmt das zweite Getriebe den Frequenzunter¬ schied zwischen der hin- und hergehenden und der pendeln¬ den Bewegung der Zahnbürstenachse. Da bei der Zahnbürste nach der EP-A-0 628 291 ein Frequenzunterschied von etwa 1 : 30 angestrebt wird, muß das zweite Getriebe relativ aufwendig gestaltet sein, um das erforderliche Überset¬ zungsverhältnis aufzuweisen. Deshalb wurde bei der EP-A-0 628 291 hierzu ein doppeltes Planetengetriebe vorgesehen.In the case of the electric toothbrush according to EP-A-0 628 291 mentioned, the second gear determines the frequency difference between the reciprocating and the oscillating movement of the toothbrush axis. Since the toothbrush according to EP-A-0 628 291 has a frequency difference of approximately 1:30 is aimed for, the second gear must be designed to be relatively complex in order to have the required transmission ratio. For this reason, a double planetary gear was provided in EP-A-0 628 291.
Wie sich aus der DE-B-15 32 804 ergibt, ist es bei elek¬ trischen Zahnbürsten auch schon bekannt, eine hin- und hergehende Bewegung der Zahnbürstenachse mittels eines Hubkurvengetriebes zu erzeugen. Diese Schrift zeigt je¬ doch kein zweites Getriebe, mit dem es möglich wird, daß die Zahnbürstenachse mit einer geringeren Frequenz als die der hin- und hergehenden Bewegung ihre pendelnde Be¬ wegung auszuführen vermag. Hiervon abgesehen ist die Zahnbürste nach der DE-B-15 32 804 so ausgelegt, daß je nach Stellung eines Schalters die Zahnbürstenachse entwe¬ der eine hin- und hergehende oder eine pendelnde Bewegung ausführt.As is apparent from DE-B-15 32 804, it is also known in the case of electric toothbrushes to produce a reciprocating movement of the toothbrush axis by means of a cam mechanism. However, this document does not show a second gear with which it is possible for the toothbrush axis to be able to carry out its oscillating movement with a frequency lower than that of the reciprocating movement. Apart from this, the toothbrush according to DE-B-15 32 804 is designed such that, depending on the position of a switch, the toothbrush axis either performs a reciprocating or an oscillating movement.
Ein sehr einfaches Getriebe für eine elektrische Zahnbür¬ ste ist in der EP-B-0 327 876 beschrieben, welches nur ein einziges Getriebe und einen einzigen Exzenter zur Er¬ zeugung beider Bewegungen der Zahnbürstenachse hat. Bei einer solchen elektrischen Zahnbürste pendelt die Zahn¬ bürstenachse jedoch zwangsläufig mit derselben Frequenz wie diejenige, mit der sie ihre in Richtung der Zahnbür¬ stenachse gerichtete, hin- und hergehende Bewegung aus¬ führt.A very simple gear for an electric toothbrush is described in EP-B-0 327 876, which has only a single gear and a single eccentric to generate both movements of the toothbrush axis. In such an electric toothbrush, however, the toothbrush axis inevitably oscillates at the same frequency as that with which it executes its reciprocating movement directed in the direction of the toothbrush axis.
Der Erfindung liegt das Problem zugrunde, eine elektri¬ sche Zahnbürste der eingangs genannten Art so auszubil¬ den, daß sich mit möglichst geringem Aufwand eine unter¬ schiedliche Frequenz zwischen der Pendelbewegung und der hin- und hergehenden Bewegung der Zahnbürstenachse errei¬ chen läßt. Dieses Problem wird erfindungsgemäß dadurch gelöst, daß das erste Getriebe ein Hubkurvengetriebe mit einer auf der Motorwelle vorgesehenen, umlaufenden Hubkurve ist und daß das zweite, den Exzenter aufweisende Getriebe zum An¬ trieb ein ebenfalls auf der Motorwelle angeordnetes Rit¬ zel hat.The invention is based on the problem of designing an electrical toothbrush of the type mentioned at the outset in such a way that a different frequency can be achieved between the pendulum movement and the reciprocating movement of the toothbrush axis with as little effort as possible. This problem is solved according to the invention in that the first gear is a cam mechanism with a circumferential cam provided on the motor shaft, and in that the second gear having the eccentric for driving has a rite also arranged on the motor shaft.
Eine solche Zahnbürste hat nur ein einziges, die Frequenz der Motorwelle untersetzendes Getriebe. Durch das Hubkur¬ vengetriebe wird erreicht, daß die Zahnbürstenachse mit der relativ hohen Frequenz der Umlaufbewegung der Motor¬ welle ihre hin- und hergehende Bewegung ausführt, während das zweite Getriebe diese Frequenz in eine für die Pen¬ delbewegung optimale, niedrigere Frequenz untersetzt. Der Frequenzunterschied zwischen den beiden Bewegungen der Zahnbürstenachse ergibt sich bei der erfindungsgemäßen Zahnbürste durch den Unterschied zwischen der Drehzahl der Motorwelle und der Drehzahl des zweiten Exzenters. Beim Stand der Technik ergibt sich der Frequenzunter¬ schied aus der gegenüber der Drehzahl der Motorwelle her¬ abgesetzten Drehzahl des Kronenrades und der Drehzahl des zweiten Exzenters. Deshalb muß beim Stand der Technik das zweite Getriebe ein wesentlich größeres Übersetzungsver¬ hältnis aufweisen als das erfindungsgemäße Getriebe, so daß die erfindungsgemäße Zahnbürste wesentlich einfacher gestaltet sein kann und entsprechend kostengünstiger her¬ zustellen ist. Vorteilhaft ist auch bei der erfindungsge¬ mäßen Zahnbürste, daß die Zahnbürstenachse relativ zum Gehäuse der Zahnbürste kippbar ausgebildet sein kann.Such a toothbrush has only a single gear reducing the frequency of the motor shaft. The stroke cam mechanism ensures that the toothbrush axis executes its reciprocating motion with the relatively high frequency of the revolving motion of the motor shaft, while the second gear reduces this frequency to a lower frequency that is optimal for the pen motion. The frequency difference between the two movements of the toothbrush axis results in the toothbrush according to the invention from the difference between the speed of the motor shaft and the speed of the second eccentric. In the prior art, the frequency difference results from the speed of the crown wheel which is reduced compared to the speed of the motor shaft and the speed of the second eccentric. Therefore, in the prior art, the second gear must have a much larger transmission ratio than the gear according to the invention, so that the toothbrush according to the invention can be designed much simpler and is correspondingly less expensive to manufacture. It is also advantageous with the toothbrush according to the invention that the toothbrush axis can be designed to be tiltable relative to the housing of the toothbrush.
Da das zweite Getriebe nur ein relativ kleines Überset¬ zungsverhältnis haben muß, kommen für die Verwirklichung der Erfindung verschiedene Getriebeausführungen in Frage. Besonders einfach ist die Zahnbürste gestaltet, wenn das zweite Getriebe ein von dem Ritzel angetriebenes Kronen¬ rad aufweist, auf welchem der Exzenter angeordnet ist. Eine elektrische Zahnbürste, bei der die Zahnbürstenachse eine zu dem Elektromotor weisende Gabel hat, wobei der Exzenter in eine Längsführung eines Armes der Gabel ein¬ greift, kann dadurch zu der erfindungsgemäßen Zahnbürste weiterentwickelt werden, daß der andere Arm der Gabel über das Kronenrad hinwegführt und mit der Hubkurve auf der Motorwelle in Eingriff steht.Since the second transmission only has to have a relatively small transmission ratio, different transmission designs can be used to implement the invention. The toothbrush is particularly simple if the second gear has a crown wheel driven by the pinion on which the eccentric is arranged. An electric toothbrush, in which the toothbrush axis has a fork pointing towards the electric motor, the eccentric engaging in a longitudinal guide of one arm of the fork, can be further developed into the toothbrush according to the invention in that the other arm of the fork leads over the crown wheel and engages with the stroke curve on the motor shaft.
Auch das Hubkurvengetriebe kann unterschiedlich gestaltet sein. Eine vorteilhafte Ausführungsform besteht darin, daß die Hubkurve durch einen schräg zur Querrichtung der Motorwelle ausgerichteten Flansch gebildet ist und daß der über das Kronenrad greifende Arm der Gabel mit einer Führungsnut über diesen Flansch greift. Bei einem solchen Hubkurvengetriebe kann man den gewünschten Hub der Zahn¬ bürstenachse durch Wahl der erforderlichen Schräglage des Flansches festlegen.The cam mechanism can also be designed differently. An advantageous embodiment consists in that the stroke curve is formed by a flange which is oriented obliquely to the transverse direction of the motor shaft and that the arm of the fork which engages over the crown wheel engages over this flange with a guide groove. With such a cam mechanism, the desired stroke of the toothbrush axis can be determined by selecting the required inclined position of the flange.
Die Frequenz der hin- und hergehenden Bewegung der Zahn¬ bürstenachse kann gegenüber der Drehzahl der Motorwelle mit einfachen Mitteln verdoppelt werden, wenn die Hub¬ kurve zur Erzeugung von zwei Hüben pro Umdrehung der Mo¬ torwelle ausgebildet ist.The frequency of the reciprocating movement of the toothbrush axis can be doubled compared to the speed of the motor shaft with simple means if the stroke curve is designed to generate two strokes per revolution of the motor shaft.
Die Erfindung läßt zahlreiche Ausführungsformen zu. Zur weiteren Verdeutlichung ihres Grundprinzips ist eine da¬ von schematisch in der Zeichnung dargestellt und wird nachfolgend beschrieben. Diese zeigt inThe invention permits numerous embodiments. To further clarify its basic principle, one of these is shown schematically in the drawing and is described below. This shows in
Fig.l eine perspektivische Ansicht eines für dieFig.l is a perspective view of one for the
Erfindung wesentlichen Bereichs einer erfin¬ dungsgemäßen elektrischen Zahnbürste,Invention of the essential area of an electric toothbrush according to the invention,
Fig.2 eine Seitenansicht eines getriebeseitigen Endes einer Motorwelle, Fig.3 eine perspektivische Ansicht, einer gegenüber Fig. 2 geänderten Ausführungsform eines ge- triebeseitigen Endes der Motorwelle.2 shows a side view of a transmission-side end of a motor shaft, 3 shows a perspective view of an embodiment of a transmission-side end of the motor shaft that has been modified compared to FIG. 2.
Die Figur 1 zeigt einen Teilbereich eines Elektromotors 1, welcher eine Motorwelle 2 antreibt. Auf der Motorwelle 2 sind eine als schrägstehender Flansch ausgebildete Hub¬ kurve 3 und dahinter ein Ritzel 4 angeordnet. Das Ritzel 4 treibt ein gehäusefest gelagertes Kronenrad 5 an.FIG. 1 shows a partial area of an electric motor 1 which drives a motor shaft 2. On the motor shaft 2, a lifting curve 3 designed as an inclined flange and behind it a pinion 4 are arranged. The pinion 4 drives a crown wheel 5 which is fixed to the housing.
An einer zur Befestigung einer nicht dargestellten Auf¬ steckbürste ausgebildeten Zahnbürstenachse 6 ist eine Ga¬ bel 7 angebracht, welche mit einem Arm 8 über das Kronen¬ rad 5 und mit einem Arm 9 unter das Kronenrad 5 greift. In dem Arm 9 befindet sich eine als Langloch ausgebildete Längsführung 10, in die ein Exzenter des Kronenrades 5 mit Spiel greift. Dreht sich das Kronenrad 5, dann führt der Exzenter 11 eine kreisende Bewegung aus. Da er sich nur in Längsrichtung in der Längsführung 10 bewegen kann, führt diese kreisende Bewegung zu einer pendelnden Bewe¬ gung der Gabel 7 und damit auch der Zahnbürstenachse 6 um ihre Längsachse. Die Zahnbürstenachse 6 ist hierzu auf übliche Weise im nicht gezeigten Gehäuse der Zahnbürste drehbar und zusätzlich axial verschieblich gelagert.A tooth 7 is attached to a toothbrush axis 6 designed to fasten a plug-on brush, not shown, which engages with an arm 8 over the crown wheel 5 and with an arm 9 under the crown wheel 5. In the arm 9 there is a longitudinal guide 10 designed as an elongated hole, into which an eccentric of the crown wheel 5 engages with play. If the crown wheel 5 rotates, then the eccentric 11 performs a circular movement. Since it can only move in the longitudinal direction in the longitudinal guide 10, this circular movement leads to an oscillating movement of the fork 7 and thus also the toothbrush axis 6 about its longitudinal axis. To this end, the toothbrush axis 6 can be rotated in the usual manner in the toothbrush housing (not shown) and is additionally axially displaceable.
Der obere Arm 8 der Gabel 7 reicht bis über die Hubkurve 3. Er hat nahe seines motorseitigen Endes eine Führungs¬ nut 12, mit der er über die Hubkurve 3 greift. Die Füh¬ rungsnut 12 bildet deshalb mit der Hubkurve 3 ein als Kurvengetriebe ausgebildetes erstes Getriebe 13, während das Ritzel 4 mit dem Kronenrad 5 und dem Exzenter 11 ein zweites Getriebe 14 bildet.The upper arm 8 of the fork 7 extends beyond the stroke curve 3. It has a guide groove 12 near its motor-side end, with which it engages over the stroke curve 3. The guide groove 12 therefore forms with the lifting curve 3 a first gear 13 designed as a cam gear, while the pinion 4 forms a second gear 14 with the crown gear 5 and the eccentric 11.
Die Figur 2 verdeutlicht die Gestaltung der Motorwelle 2. Zu sehen ist, daß die Hubkurve 3 durch einen schrägge- stellten Flansch gebildet ist. Die Schrägstellung be¬ stimmt den Hub der in Figur 1 dargestellten Zahnbürsten¬ achse 6. Ebenfalls zu erkennen ist in Figur 2 das vor der Hubkurve 3 angeordnete Ritzel 4.Figure 2 illustrates the design of the motor shaft 2. It can be seen that the lifting curve 3 by an oblique posed flange is formed. The inclination determines the stroke of the toothbrush axis 6 shown in FIG. 1. The pinion 4 arranged in front of the stroke curve 3 can also be seen in FIG.
Bei der Ausführungsform nach Figur 3 ist die Hubkurve 3 so gestaltet, daß die in Figur 1 gezeigte Zahnbürsten¬ achse 6 zwei Hübe in Richtung ihrer Längsachse pro Umdre¬ hung der Motorwelle 2 ausführt. In the embodiment according to FIG. 3, the stroke curve 3 is designed such that the toothbrush axis 6 shown in FIG. 1 carries out two strokes in the direction of its longitudinal axis per revolution of the motor shaft 2.
BezugszeichenlisteReference list
1 Elektromotor1 electric motor
2 Motorwelle2 motor shaft
3 Hubkurve3 stroke curve
4 Ritzel4 sprockets
5 Kronenrad5 crown gear
6 Zahnbürstenachse6 toothbrush axis
7 Gabel7 fork
8 Arm8 arm
9 Arm9 arm
10 Längsführung10 longitudinal guide
11 Exzenter11 eccentrics
12 Führungsnut12 guide groove
13 erstes Getriebe13 first gear
14 zweites Getriebe 14 second gear

Claims

Patentansprüche claims
1. Elektrische Zahnbürste mit einer in einem Zahnbürsten¬ gehäuse drehbar und axial verschieblich gelagerten Zahn¬ bürstenachse, welche von einer umlaufenden Motorwelle ei¬ nes Elektromotors mittels eines ersten Getriebes in eine hin- und hergehende Bewegung in Richtung ihrer Längsachse und durch ein zweites, einen Exzenter aufweisendes Ge¬ triebe in eine um ihre Längsachse pendelnde Drehbewegung versetzbar ist, dadurch gekennzeichnet, daß das erste Ge¬ triebe (13) ein Hubkurvengetriebe mit einer auf der Mo¬ torwelle (2) vorgesehenen, umlaufenden Hubkurve (3) ist und daß das zweite, den Exzenter (11) aufweisende Ge¬ triebe (14) zum Antrieb ein ebenfalls auf der Motorwelle (2) angeordnetes Ritzel (4) hat.1. Electric toothbrush with a toothbrush axis which is rotatably and axially displaceably mounted in a toothbrush housing and which is rotated by a rotating motor shaft of an electric motor by means of a first gear in a reciprocating movement in the direction of its longitudinal axis and by a second, one Eccentric gear mechanism can be set into a rotary movement oscillating about its longitudinal axis, characterized in that the first gear mechanism (13) is a cam mechanism with a circumferential cam curve (3) provided on the motor shaft (2) and that second gear (14) having the eccentric (11) for driving has a pinion (4) also arranged on the motor shaft (2).
2. Elektrische Zahnbürste nach Anspruch 1, dadurch ge¬ kennzeichnet, daß das zweite Getriebe (14) ein von dem Ritzel (4) angetriebenes Kronenrad (5) aufweist, auf wel¬ chem der Exzenter (11) angeordnet ist.2. Electric toothbrush according to claim 1, characterized ge indicates that the second gear (14) has a pinion (4) driven crown wheel (5) on which the eccentric (11) is arranged.
3. Elektrische Zahnbürste nach Anspruch 2, bei der die Zahnbürstenachse eine zu dem Elektromotor weisende Gabel hat, wobei der Exzenter in eine Längsführung eines Armes der Gabel eingreift, dadurch gekennzeichnet, daß der an¬ dere Arm (8) der Gabel (7) über das Kronenrad (5) hinweg¬ führt und mit der Hubkurve (3) auf der Motorwelle (2) in Eingriff steht.3. Electric toothbrush according to claim 2, wherein the toothbrush axis has a fork pointing towards the electric motor, the eccentric engaging in a longitudinal guide of an arm of the fork, characterized in that the other arm (8) of the fork (7) over the crown wheel (5) leads away and engages with the stroke curve (3) on the motor shaft (2).
4. Elektrische Zahnbürste nach Anspruch 3, dadurch ge¬ kennzeichnet, daß die Hubkurve (3) durch einen schräg zur Querrichtung der Motorwelle (2) ausgerichteten Flansch gebildet ist und daß der über das Kronenrad (5) greifende Arm (8) der Gabel (7) mit einer Führungsnut (12) über diesen Flansch greift. 96/38100 PCΪ7EP96/023724. Electric toothbrush according to claim 3, characterized ge indicates that the lifting curve (3) is formed by an obliquely to the transverse direction of the motor shaft (2) aligned flange and that the over the crown wheel (5) cross arm (8) of the fork ( 7) with a guide groove (12) over this flange. 96/38100 PCΪ7EP96 / 02372
5. Elektrische Zahnbürste nach Anspruch 3, dadurch ge¬ kennzeichnet, daß die Hubkurve (3) zur Erzeugung von zwei Hüben pro Umdrehung der Motorwelle (2) ausgebildet ist. 5. Electric toothbrush according to claim 3, characterized ge indicates that the stroke curve (3) for generating two strokes per revolution of the motor shaft (2) is formed.
PCT/EP1996/002372 1995-06-02 1996-06-01 Electric toothbrush WO1996038100A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU62207/96A AU6220796A (en) 1995-06-02 1996-06-01 Electric toothbrush

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19520290.2 1995-06-02
DE1995120290 DE19520290A1 (en) 1995-06-02 1995-06-02 Electric toothbrush

Publications (1)

Publication Number Publication Date
WO1996038100A1 true WO1996038100A1 (en) 1996-12-05

Family

ID=7763529

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/002372 WO1996038100A1 (en) 1995-06-02 1996-06-01 Electric toothbrush

Country Status (3)

Country Link
AU (1) AU6220796A (en)
DE (1) DE19520290A1 (en)
WO (1) WO1996038100A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10449023B2 (en) * 2015-07-08 2019-10-22 Water Pik, Inc. Oral cleansing device with energy conservation
USD959840S1 (en) 2013-03-15 2022-08-09 Water Pik, Inc. Brush head for oral cleansing device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1792358A (en) * 1927-07-14 1931-02-10 Vibro Electric Tooth Brush Com Toothbrush
US3561033A (en) * 1969-05-06 1971-02-09 Aqua Tec Corp Automatic toothbrush with motion selector
FR2578408A1 (en) * 1985-03-07 1986-09-12 Bole Yves Toothbrush whose active elements are displaced automatically
DE4225548A1 (en) * 1992-08-01 1994-02-03 Bausch & Lomb Electric toothbrush
EP0628291A2 (en) * 1993-05-28 1994-12-14 Koninklijke Philips Electronics N.V. Toothbrush

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9415812U1 (en) * 1994-10-04 1994-12-01 Gimelli Produktions Ag, Zollikofen Electric toothbrush

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1792358A (en) * 1927-07-14 1931-02-10 Vibro Electric Tooth Brush Com Toothbrush
US3561033A (en) * 1969-05-06 1971-02-09 Aqua Tec Corp Automatic toothbrush with motion selector
FR2578408A1 (en) * 1985-03-07 1986-09-12 Bole Yves Toothbrush whose active elements are displaced automatically
DE4225548A1 (en) * 1992-08-01 1994-02-03 Bausch & Lomb Electric toothbrush
EP0628291A2 (en) * 1993-05-28 1994-12-14 Koninklijke Philips Electronics N.V. Toothbrush

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD959840S1 (en) 2013-03-15 2022-08-09 Water Pik, Inc. Brush head for oral cleansing device
US10449023B2 (en) * 2015-07-08 2019-10-22 Water Pik, Inc. Oral cleansing device with energy conservation
US11284980B2 (en) 2015-07-08 2022-03-29 Water Pik, Inc. Oral cleansing device with rotatable fluid connector

Also Published As

Publication number Publication date
DE19520290A1 (en) 1996-12-05
AU6220796A (en) 1996-12-18

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