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DE6603784U - PORTABLE DENTAL INSTRUMENT - Google Patents

PORTABLE DENTAL INSTRUMENT

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Publication number
DE6603784U
DE6603784U DE6603784U DE6603784U DE6603784U DE 6603784 U DE6603784 U DE 6603784U DE 6603784 U DE6603784 U DE 6603784U DE 6603784 U DE6603784 U DE 6603784U DE 6603784 U DE6603784 U DE 6603784U
Authority
DE
Germany
Prior art keywords
motor
handle
shaft
instrument according
elbow
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
DE6603784U
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of DE6603784U publication Critical patent/DE6603784U/en
Expired legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/02Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design characterised by the drive of the dental tools
    • A61C1/06Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design characterised by the drive of the dental tools with electric drive
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C2204/00Features not otherwise provided for
    • A61C2204/002Features not otherwise provided for using batteries

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (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)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Description

DR. ING. E. HOFFMANN · DIPL. ING. Λ\\ EITLE · DR. RER. NAT. K. HOFFMANNDR. ING. E. HOFFMANN · DIPL. ING. Λ \\ EITLE DR. RER. NAT. K. HOFFMANN

PATENTANWÄLTEPATENT LAWYERS D-8000 MÖNCHEN 80 · MARIA-TH ERESIA-STRASSE 6 · TELEFON (0811) 441061D-8000 MÖNCHEN 80 MARIA-TH ERESIA-STRASSE 6 TELEPHONE (0811) 441061

Mitsubishi Denki Kabushiki Kaisha, Tokyo / JapanMitsubishi Denki Kabushiki Kaisha, Tokyo / Japan

Tragbares zahnärztliches InstrumentPortable dental instrument

Die vorliegende Neuerung betrifft ein tragbares, inThe present innovation concerns a portable, in

sich abgeschlossenes, zahnärztliches Instrument, mit dem ein Zahnarzt faule Zähne ausbohrt oder Gebisse zuschleift bzw. poliert.A self-contained, dental instrument with which a dentist drills out rotten teeth or grinds or grinds teeth. polished.

Nach der bisherigen Praxis wurde ein solches zahnärztliches Instrument durch Leitung von elektrischem Strom von einer Stromquelle über einen endlosen Riemen zum Griff des Instruments angetrieben. Die Alternative zu dieser Art des Antriebs war Druckluft, die von einem Luftverdichter durch einen elastischen Schlauch zu einem in einem solchen Griff angeordneten rotierenden Turbinenrad geleitet wurde,According to previous practice, such a dental instrument was made by conducting an electric current Driven by a power source through an endless belt to the handle of the instrument. The alternative to this type the drive was compressed air coming from an air compressor through an elastic hose to one in such a Handle arranged rotating turbine wheel was directed,

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um dem Arbeitsende des zahnärztlichen Instruments die nötige Energie zuzuführen. Das Instrument war von seiner Energiequelle, die entweder ein Elektromotor oder ein Luftverdichter war, getrennt. Dadurch nahm der Apparat viel Raum ein. Ferner ergibt sich durch die Verwendung eines endlosen Riemens und des damit verbundenen ßiemenarmes oder eines flexiblen Shlauches als Energieübertragungsmechanismus zwangsläufig nicht nur ein Energieverlust, der kompensiert werden muß, sondern es wird auch der Arbeitsbereich für den Zahnarzt durch die Größe dieser Vorrichtung in unerwünschter Weise verkleinert. Zahnärzte müssen also bei heiklen Behandlungen notwendigerweise in unnatürlichen Stellungen arbeiten. Dazu kommt noch die mechanische Schwingung des Riemens oder Schlauches, die sich auf die Hand des Zahnarztes überträgt, daß er schnell müde wird.at the end of the work of the dental instrument the necessary To supply energy. The instrument was powered by its source of energy, which was either an electric motor or an air compressor was separated. As a result, the apparatus took up a lot of space. It also results from the use of an endless belt and the associated ßiemenarmes or a flexible hose as an energy transmission mechanism inevitably not just a loss of energy that has to be compensated, but it also becomes the working area for the dentist due to the size of this device in an undesirable manner scaled down. Dentists must therefore necessarily work in unnatural positions for delicate treatments. In addition, there is the mechanical vibration of the belt or hose that is transmitted to the dentist's hand, that he gets tired quickly.

Es ist daher das Hauptziel der vorliegenden Neuerung, ein neues und verbessertes zahnärztliches Instrument zu schaffen, mit dem der Zahnarzt in einer angenehmen Stellung arbeiten kann und das sich außerdem leicht bedienen läßt.It is therefore the main aim of the present innovation to provide a new and improved dental instrument with which the dentist can work in a comfortable position and which is also easy to use leaves.

Ein vielter es Ziel der Neuerung ist die Schaffung eines neuen und in sich abgeschlossenen zahnärztlichen Instrumentes, das tragbar und zugleich einfach und sicher im Betrieb ist.Much more of the goal of innovation is creation of a new and self-contained dental Instrument that is portable and at the same time easy and safe to use.

Der Gegenstand der vorliegenden Neuerung kann ferner nicht mit einer Geschwindigkeit betrieben werden, die einen vorbestimmten Wert übersteigt, auch wenn die Belastung des Instrumentes schwanken sollte.The subject of the present innovation can also not be operated at a speed that exceeds a predetermined value, even if the load on the instrument should fluctuate.

Die Neuerung schafft überdies ein Instrument, bei dem das Winkelstück auf dem Griff beliebig eingestellt, d.h. in eine vorbestimmte Richtung abgewinkelt werden kann.The innovation also creates an instrument in which the contra-angle handpiece can be set as desired on the handle, i.e. can be angled in a predetermined direction.

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Die Neuerung ist gekennzeichnet durch einen bleistiftförmigen Griff, ein an einem Ende des Griffes befestigtes Winkelstück mit einer Drehwelle und einem auswechselbaren Bohreiernent, einen im Griff angeordneten Miniaturgleichstrommotor, einer ebenfalls im Griff angeordneten Stromquelle zur Erregung des Motors, durch die das Drehmoment des Motors über die Drehwelle auf das Bohrelement übertragbar ist, sowie durch Ausrichtung der Längsachsen der Stromquelle und des Motors auf einer gemeinsamen Linie mit der Achse der Drehwelle.The innovation is characterized by a pencil-shaped one Handle, an elbow attached to one end of the handle with a rotating shaft and an interchangeable one Bohreiernent, a miniature DC motor arranged in the handle, a power source also arranged in the handle to excite the motor, through which the torque of the motor can be transmitted to the drilling element via the rotary shaft, as well as by aligning the longitudinal axes the power source and the motor on a common line with the axis of the rotating shaft.

Als Stromquelle dient vorzugsweise eine Lagerbatterie oder ein Akkumulator. An einem Ende des Griffes ist ein Anschluß zur Verwendung beim Aufladen des Akkumulator durch ein äußerliches Ladegerät angeordnet.A storage battery or an accumulator is preferably used as the power source. At one end of the handle is a Terminal arranged for use in charging the accumulator by an external charger.

An dem sich verjüngenden Ende des Griffes ist zweckmäßig ein normalerve.se offener Druckknopfschalter angeordnet. Der Motor rotiert nur während des manuellen Eindrückens des Druckknopfes.At the tapered end of the handle is useful a normalerve.se open push button switch arranged. The motor only rotates while the push button is being pushed in manually.

Um zu verhindernj daß sich der Motor mit einer einen vorbestimmten Wert übersteigenden Geschwindigkeit dreht, kann er vorzugsweise mit einem eingebauten Eegelmechanismus ausgestattet sein.To prevent the engine from interfering with a If the speed exceeds a predetermined value, it can preferably be operated with a built-in control mechanism be equipped.

Weitere Einzelheiten der Neuerung und deren Arbeitsweise werden im folgenden unter Bezugnahme auf das in der beiliegenden Zeichnung dargestellte Ausführungsbeispiel erläutert. In der Zeichnung ist: Further details of the innovation and its mode of operation are given below with reference to the Explained in the accompanying drawing illustrated embodiment. In the drawing is:

Fig. 1 eine schematische Vorderansicht eines neuerungsgeinäßen zahnärztlichen Instruments;Fig. 1 is a schematic front view of an innovation dental instrument;

660378660378

Fig. 2 ein vergrößerter Längsschnitt, teilweise jedoch eine Draufsicht, durch bzw. auf das Instrument von Fig. l;2 shows an enlarged longitudinal section, partly however a plan view, through or onto the instrument of Fig. 1;

Fig. 3 ein Querschnitt auf der Linie III-III von Fig. 2;Fig. 3 is a cross section on the line III-III of Fig. 2;

Fig. μ- eine teilweise perspektivische Ansieht eines Winkelstückes und des daran anschließenden oberen Endabschnittes des Griffes von Fig. 1 und 2 in auseinandergezogener Darstellung;Fig. Μ- a partial perspective view of an elbow and the adjoining upper end portion of the handle of FIGS. 1 and 2 in an exploded view Depiction;

Fig. 5 eine perspektivische Darstellung des Kupplungsteiles von Fig. 2; FIG. 5 shows a perspective illustration of the coupling part from FIG. 2; FIG.

Fig. 6 ein elektrisches Schaltbild einer in Verbindung mit der Neuerung verwendbaren Schaltung; und6 shows an electrical circuit diagram of a circuit which can be used in connection with the innovation; and

Fig. 7 ein Schaltbild einer Ladeschaltung zum Aufladen der im neuerungsgemaßen Instrument angeordneten Lagerbatterie.Fig. 7 is a circuit diagram of a charging circuit for charging the arranged in the instrument according to the innovation Storage battery.

Fig. 1 und 2 zeigen ein neuerungsgemäß konstruiertes Zahnärztliches Insrument. Das Instrument besitzt einen Griff 10, bestehend aus einem als Hohlzylinder ausgebildeten Hauptteil 12 aus Kunststoff, einem spitz zulaufenden als hohlen Kegelstumpf ausgebildeten Abschnitt I2+, der ebenfalls aus Kunststoff gefertigt ist und mit seinem breiten unteren Ende bei l6 in den anschließenden Endabschnitt des Hauptteiles 12 geschraubt ist, sowie aus einer unteren Kappe 18, ebenfalls aus Kunststoff, die bei 20 mit dem anderen Ende des Hauptteiles 12 verschraubt ist und den letzteren verschließt.1 and 2 show a dental instrument constructed according to the invention. The instrument has a handle 10, consisting of a main part 12 made of plastic in the form of a hollow cylinder, a tapering section I 2 + in the form of a hollow truncated cone, which is also made of plastic and with its wide lower end at l6 into the adjoining end section of the main part 12 is screwed, and a lower cap 18, also made of plastic, which is screwed at 20 to the other end of the main part 12 and closes the latter.

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Innerhalb des Hauptteiles 12 ist nahe dem Abschn, itt 14 ein MiniaturgleichstroiEinotor 22 angeordnet, dessen Welle 21J- sich gegen den Abschnitt l4 erstreckt. Auf der anderen Seite desElektromotors 22 ist ein Begelmechanisiiius 26 angeordnet, der unmittelbar mit der Welle 24 verbunden ist und verhindert, daß die Umdrehungsgeschwindigkeit des Motors 22 einen bestimmten Wert übersteigt. Innerhalb des Hauptteiles 12 des Griffes 10 ist ferner eine geschlossene zylindrische Lagerbatterie bzw. ein Akkumulator 28 angeordnet, und zwar anschließend an die dem Motor 22 gegenüberliegende Seite des Regelmechanismus 26. Zwischen dem letzteren und der Lagerbetteria 28 ist ein Abstandteil 30aus Kunststoff eingesetzt. Zur elektrischen Verbindung des Motors 22 mit der Batterie 28 ist der Abstandteil 30 mit einem elektrischen Kontakt 32 versehen, der mit dem positiven Pol der Batterie 28 und mit der positiven Klemme des Motors 22 über eine Leitung 34 verbunden ist. Der Motor 22 wird im Hauptteil 12 des Griffes 10 durch eine Feststellschraube 36 festgehalten, die in die Wand des Hauptteils 12 eingeschraubt ist.Within the main part 12, close to the section 14, there is arranged a miniature DC motor 22, the shaft 2 1 of which extends towards the section 14. On the other side of the electric motor 22 a control mechanism 26 is arranged, which is directly connected to the shaft 24 and prevents the rotational speed of the motor 22 from exceeding a certain value. A closed cylindrical storage battery or accumulator 28 is also arranged within the main part 12 of the handle 10, namely adjoining the side of the control mechanism 26 opposite the motor 22. A spacer 30 made of plastic is inserted between the latter and the storage battery 28. For the electrical connection of the motor 22 to the battery 28, the spacer 30 is provided with an electrical contact 32 which is connected to the positive pole of the battery 28 and to the positive terminal of the motor 22 via a line 34. The motor 22 is held in the main part 12 of the handle 10 by a locking screw 36 which is screwed into the wall of the main part 12.

Wie am besten aus Fig. 2 ersichtlich, trägt der Abschnitt 14 an seinem verjüngten Ende ein Winkelstück 38 bekannter Ausbildung. Das Winkelstück 38 besitzt einen Schaft 40, der in den Abschnitt 14 eingepaßt ist und das Winkelstück 38 verstellbar fosthält, sowie eine dünne Drehwelle 42, die drehbar im Festhalteschaft 40 sitzt und von einem geeigneten Lager 44, z.B. einem mit Ol imprägnierten Lager, getragen wird. Am freien Ende der Drehwelle 42 ist ein kreuzförmiger Stift 46 vorgesehen, der sich von ihr in zwei Richtungen erstreckt und mit der Motorwelle 24 auf einer geraden Linie ausgerichtet ist. Das Winkelstück 38 besitzt ferner einen Bedienungshebel 48 bekannter Ausbildung, der mechanisch mit dem Festhalteschaft 40 verbunden ist. DerAs can best be seen from FIG. 2, the section 14 carries an angle piece 38 at its tapered end known training. The elbow 38 has a shaft 40 which is fitted in the section 14 and holds the elbow 38 adjustably and a thin rotating shaft 42, which is rotatably seated in the retaining shaft 40 and of a suitable bearing 44, such as an oil impregnated bearing. At the free end of the rotating shaft 42 is a cruciform Pin 46 is provided which extends from it in two directions and with the motor shaft 24 in a straight line Line is aligned. The elbow 38 also has an operating lever 48 of known design, the is mechanically connected to the retaining shaft 40. Of the

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Bedienungshebel 48 dient dazu, das Winkelstück 38 mit des spitz zulaufenden Abschnitt 14 in Eingriff zu bringen und es aus diesem Eingriff zu lösen. Das Winkelstück 38 trägt ein auswechselbares Bohrelement 50, das an seinem freien Ende lösbar befestigt ist.Operating lever 48 is used to hold the elbow 38 with the to bring tapered portion 14 into engagement and to release it from this engagement. The elbow 38 carries a replaceable drilling element 50, which is on its free End is releasably attached.

Fig. 2 zeigt, daß die Längsachsen des Motors 22 und der Batterie 28 im wesentlichen auf einer gemeinsamen Linie mit der Achse der Drehwelle 42 ausgerichtet sind. Der Griff 10, der die oben erwähnten Bestandteile aufweist, hat im wesentlichen die Form eines Bleistiftes und kann vom Zahnarzt leicht mit den Fingern erfaßt werden.Fig. 2 shows that the longitudinal axes of the motor 22 and the battery 28 are substantially on a common Line with the axis of the rotating shaft 42 are aligned. The handle 10, which comprises the above-mentioned components, has essentially the shape of a pencil and can easily grasped by the dentist with the fingers.

Wie ebenfalls aus Fig. 2 ersichtlich ist, ist in der Außenseite der Kappe l8 eine zylindrische Ausnehmung mit einem Anschluß 52 ausgebildet, d©r zum Aufladen der Batterie 28 durch eine geeignete äußere Gleichstromquelle (nicht gezeigt) dient. Der Anschluß 52 umfaßt einen Kontaktstift 5^» der mit der negativen Klemme eines Ladegerätes (nicht gezeigt) verbunden werden kann, ein becherförmiges Kontaktblech 55j eine Unterlegscheibe 56 aus einem Isolierstoff zur Isolierung des Stiftes 5^ gegen das becherförmige Kontaktblech 55» sowie einen U-förmigen Kontaktstreifen 58, der den Stift 5^ mit dem negativen Pol der Batterie 28 verbindet.As can also be seen from FIG. 2, a cylindrical recess with a connection 52 is formed in the outside of the cap 18, which is used to charge the battery 28 by a suitable external direct current source (not shown). The connection 52 comprises a contact pin 5 ^ »which can be connected to the negative terminal of a charger (not shown), a cup-shaped contact plate 55j, a washer 56 made of an insulating material to isolate the pin 5 ^ from the cup- shaped contact plate 55» and a U- shaped contact strip 58, which connects the pin 5 ^ to the negative pole of the battery 28.

Am breiten Ende des spitz zulaufenden Abschnittes 14 des Griffes 10 ist ein normalerweise offener Druckknopfschalter 60 angeordnet.At the broad end of the tapered portion 14 of the handle 10 is a normally open push button switch 60 arranged.

Fig. 3 zeigt, daß der Schalter 60 einen beweglichen Kontaktstreifen 6l in Form eines Seg^mentes, das an einem j Ende an der Innenwand des verbreiterten Endes des spitzFig. 3 shows that the switch 60 has a movable contact strip 6l in the form of a Seg ^ mentes that on a j end on the inner wall of the widened end of the pointed

zulaufenden Abschnittes 14 z.B. durch eine Niete befestigttapered section 14 is fastened, for example, by a rivet

j ist, und einen stationären Kontaktstreifen 62 aufweist,j, and has a stationary contact strip 62,

der zweckmäßig an derselben Wand befestigt ist. Zwischen den beiden einander gegenüberliegenden Enden der Kontaktstreifen bleibt ein kleiner Abstand frei. Ein verhältnismäßig kurzer Stab oder ein Knopf 63 aus einem geeigneten Kunststoff sitzt lose in jenem Teil der Wand des Abschnittes 14, der dem an der Innenwand befestigten Ende des beweglichen Kontaktstreifens unmittelbar gegenüberliegt, und erstreckt sich bis zum Streifen 61, in dem er starr befestigt ist. Der Knopf 63 ragt ein wenig über die Außenwand des Abschnittes 14 hinaus und kann manuell eingedrückt werden, so daß der bewegliche Kontaktstreifen 61 den stationären Kontaktstreifen 62 berührt und der Schalter geschlossen ist.which is conveniently attached to the same wall. Between the two opposite ends of the contact strips a small gap remains free. A relatively short rod or button 63 made of a suitable one Plastic sits loosely in that part of the wall of the section 14, which is attached to the inner wall of the movable end Contact strip is directly opposite, and extends to the strip 61, in which it is rigidly attached is. The button 63 protrudes a little beyond the outer wall of the section 14 and can be pressed in manually so that the movable contact strip 61 contacts the stationary contact strip 62 and the switch closed is.

Aus Fig. 6, in der die den Fig. 2 und 3 entsprechenden Teile jeweils mit den entsprechenden Bezugsziffern bezeichnet sind, ist ersichtlich, daß der Schalter 60 in einer Reihenschaltung liegt, die die Batterie 28, den Motor 22 und die vom Regelmechanismus 24 betätigte und über einen Kondensator 79 verbundenen Kontakte umfaßt. Der Kondensator 79 ist ein Schutz gegen Funkenbildung an den Kontakten des Regelmechanismus 24 und verhindert außerdem Radio störungen. Der Schalter 60 kann nur dann geschlossen, und der Motor 22 nur dann in die Schaltung einbezogen werden, wenn der Knopf 63 eingedrückt ist.From Fig. 6, in which the parts corresponding to FIGS. 2 and 3 are each designated by the corresponding reference numerals it can be seen that the switch 60 is in a series circuit connecting the battery 28, the motor 22 and which is actuated by the regulating mechanism 24 and connected via a capacitor 79. The condenser 79 is a protection against sparking at the contacts of the control mechanism 24 and also prevents radio interference. The switch 60 can only be closed and the motor 22 can only be included in the circuit when the button 63 is depressed.

Aus Fig. 4, in der die der Fig. 2 entsprechenden Teile jeweils mit den entsprechenden Bezugsziffern bezeichnet sind, ist ersichtlich, daß in der Stirnfläche am schmalen Ende dos Abschnittes 14 eine Vielzahl - im vorliegenden Beispiel vier - von formgleichen, axialen Einkerbungen 64, 65, 66 und 67 angebracht ist. Diese Einkerbungen sind in imFrom Fig. 4, in which the parts corresponding to FIG. 2 are each designated by the corresponding reference numerals are, it can be seen that in the end face at the narrow end dos portion 14 a plurality - in the present Example four - of identical, axial notches 64, 65, 66 and 67 is attached. These notches are in the

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wesentlichen gleichen Winkelabständen angeordnet, und der Pesthalteschaft 40 weist an seinem an den Hauptteil des Winkelstücks 38 anschließenden Ende einen einzigen Vorsprung 68 auf, dessen Form den Einkerbungen 64 - 67 entspricht, die mit ihm wahlweise in Eingriff gebracht werden können. Aus Fig. 2 ist zu ersehen, daß am anderen Ende des Festhalteschaftes 40 ein Ring 70 starr befestigt ist. Zwischen diesem Ring 70 und dem Inneren des spitz zulaufenden Abschnittes befind* sich eine Druckfeder 72, die das Winkelstück 38 normalerweise gege 1 die Seite des Abschnittes 14 drückt und verhindert, daß sich der Vorsprung 68 aus dem Eingriff mit einer der Einkerbungen löst·arranged substantially equal angular distances, and the Plague holding 40 points at its to the main part of the Elbow 38 adjoining end has a single projection 68, the shape of which corresponds to the notches 64-67 that are selectively engaged with it can be. From Fig. 2 it can be seen that a ring 70 is rigidly attached to the other end of the retaining shaft 40 is. Between this ring 70 and the inside of the pointed tapered section is a compression spring 72, which the angle piece 38 normally against 1 the side of the Section 14 pushes and prevents projection 68 from disengaging from one of the notches solves

Zur Verbindung der Motorwelle 24 mit der Drehwelle 42 des Winkelstücks 38 1st ein zylindrisches Kupplungselement 74 aus Kunststoff vorgesehen, in dessen einem Ende die Motorwelle 24 starr befestigt ist, während sein zweites Ende mit einer axialen Bohrung 76 versehen ist, in deren Wand zwei einander diametral gegenüberliegende Schlitze 78 ausgebildet sind. Diese Sdiitze 78 sind länger als der Vorsprung 68 auf dem Schaft 40. Die Drehwelle 42 des Winkelstücks 38 wird in die zentrale Bohrung 76 eingesetzt, wobei der Kreuzstab 46 in die Schlitze 78 gleitet; durch diese Maßnahme werden die Motorwelle 24 und die Drehwelle 42 des Winkelstücks 38 im wesentlichen in einer gemeinsamen Linie ausgerichtet und in ein Energ i »übertragungs verhältni s gebracht.For connecting the motor shaft 24 to the rotating shaft 42 of the angle piece 38, a cylindrical coupling element 74 made of plastic is provided, in one end of which the motor shaft 24 is rigidly attached, while its second end is provided with an axial bore 76 in the wall of which two diametrically opposed slots 78 are formed. These threads 78 are longer than the protrusion 68 on the shaft 40. The rotary shaft 42 of the elbow 38 is inserted into the central bore 76 inserted with cross bar 46 sliding into slots 78; by this measure, the motor shaft 24 and the rotating shaft 42 of the elbow 38 substantially aligned in a common line and brought into an energy transfer relationship.

Beim Betrieb lies neue rungs gemäßen Instrumentes ruhen die Fingerwurzelknochen des rechten Zeigefingers und Daumens des Zahnarztes auf dem Hauptteil 12 des Griffes 10, während 6Ap genanrten Finger, sowie der Mittelfinger den Abschnitt 14 erfassen. Des Winkelstück 38 wird nun so inWhen operating the new instrument according to the approximation, the phalanx of the right index finger and thumb of the dentist rest on the main part 12 of the handle 10, while the fingers 6A p and the middle finger grasp the section 14. The elbow 38 is now so in

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den Mund eines Patienten eingeführt, daß sich das Bohrelement 50 in der Nähe des zu behandelnden Zahnes befinr det, z.B. eines Zahnes im Unterkiefer, worauf der Zahnarzt den Druckknopf 63 mit seinem Daumen oder Zeigefinger eindrückt. Dadurch wird der Schalter 60 geschlossen und der Motor 22 im Hauptteil 12 durch die Batterie 28
erregt. Die Drehung des Motors 22 wird über den Kupplungsteil 7*4- und die Drehwelle 42 des Winkelstücks 38 af das Bohrelement 50 übertragen, das nun seinerseits in Drehung versetzt wird und den faulen Zahn ausbohrt.
inserted into the mouth of a patient so that the drilling element 50 is in the vicinity of the tooth to be treated, for example a tooth in the lower jaw, whereupon the dentist presses the push button 63 with his thumb or forefinger. As a result, the switch 60 is closed and the motor 22 in the main part 12 is closed by the battery 28
excited. The rotation of the motor 22 is transmitted via the coupling part 7 * 4- and the rotary shaft 42 of the angle piece 38 af the drilling element 50, which in turn is now set in rotation and bores out the rotten tooth.

Es ist klar, daß unter diesen Umständen die Belastung des Bohrelementes 50 von der Karies des zu behandelnden Zahnes abhängt. Wenn sich die Belastung des Bohrelementes 50 verringert und sich dadurch die Umdrehungsgeschwindigkeit des Motors 22 über einen vörbestimmten
Wert erhöht, tritt der Regelmechanismus 26 in Tätigkeit und löst die Verbindung zwischen dem Motor 22 und der Batterie 28, so daß sich die Drehung des Motors verlangsamt. Auf diese Weise wird ein übermäßiges Ansteigen der Drehgeschwindigkeit des Motors 22 vermieden. Verlangsamt sich der Motor bis zu seiner unteren Geschwindigkeitsgrenze, wird er durch den Hegelmechanismus 26 nicht von der Batterie 28 getrennt. Der Motor 22 wird also durch die
Batterie 28 wieder erregt.
It is clear that under these circumstances the load on the drilling element 50 depends on the caries of the tooth to be treated. If the load on the drilling element 50 is reduced and thereby the speed of rotation of the motor 22 over a predetermined
If the value increases, the control mechanism 26 comes into action and releases the connection between the motor 22 and the battery 28, so that the rotation of the motor slows down. In this way, an excessive increase in the rotational speed of the motor 22 is avoided. If the motor slows down to its lower speed limit, it is not separated from the battery 28 by the control mechanism 26. The motor 22 is so through the
Battery 28 energized again.

Der oben beschriebene Vorgang wiederholt sich, bis der Druckknopf 63 losgelassen wird. Beim Loslassen kommen die Drehung des Motors 22 und damit das Bohrelement 50 zum Stillstand.The process described above is repeated until the push button 63 is released. Come when you let go the rotation of the motor 22 and thus the drilling element 50 to a standstill.

Soll ein fauler Zahn im Oberkiefer ausgebohrt
werden, wird das Winkelstück 38 mit der Hand gegen die
A rotten tooth is supposed to be drilled out in the upper jaw
are, the elbow 38 is by hand against the

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- 10 -- 10 -

Kraft der Feder 72 nach oben gedruckt, so daß sich der Vorsprung 68 auf dem Schaft ^O aus dem Eingriff mit der Einkerbung 6k löst. Anschließend dreht man das Winkelstück 38 in bezug auf den Griff 10 um seine eigene Achse, bis der Vorsprung 68 in die Einkerbung 66 eingreift, die der Einkerbung 64 diametral gegenüberliegt. Das Winkelstück 38 wird auf diese Weise in die in Fig. 1 durch Strichpunktlinien angedeutete Stellung gebracht, in der es in eine der ursprünglichen Neigungsrichtung entgegengesetzte Richtung geneigt ist. Es versteht sich, daß der Druckknopf 63 in diesem Fall die gleiche Ausrichtung hat wie beim Ausbohren eines Zahnes im Unterkiefer. Er kann also auch in ähnlicher Weise mit dem rechten Daumen oder Zeigefinger betätigt werden. Force of the spring 72 pressed upwards, so that the projection 68 on the shaft ^ O disengages from the notch 6k. The angle piece 38 is then rotated around its own axis with respect to the handle 10 until the projection 68 engages in the notch 66 which is diametrically opposite the notch 64. The angle piece 38 is brought in this way into the position indicated by dash-dotted lines in FIG. 1, in which it is inclined in a direction opposite to the original direction of inclination. It goes without saying that the push button 63 in this case has the same orientation as when drilling out a tooth in the lower jaw. It can also be operated in a similar way with the right thumb or forefinger.

Ia Abhängigkeit von der Neigung der anzubohrenden Zahnfläche kann der Vorsprung 68 zweckmäßig auch in eine der restlichen Einkerbungen 65j 67 eingreifen, so daß das Winkelstück 38 in die entsprechend Richtung gedreht wird. Der Zahnarzt kann also das neuerungsgemäße Instrument in verschiedenen Stellungen verwenden, ohne die Lage des Druckknopfes 63 zu verändeh.Depending on the inclination of the tooth surface to be drilled, the projection 68 can also expediently be in a of the remaining notches 65j 67 engage so that the angle piece 38 is rotated in the corresponding direction. The dentist can therefore use the instrument in accordance with the innovation use in different positions without changing the position of the push button 63.

Es ist klar, daß nach wiederholter Verwendung des Instruments die in der LagerbatterJe 28 aufgespeicherte Energie auf ihren unteren Grenzwert, absinkt. Wenn dies der Fall ist, muß <?ie Batterie 28 aufgeladen werden. Dies kann dadurch geschehen, daß man den Anschluß 52 in der unteren Kappe l8 elektrisch mit zwei Ausgangsklemmen eines geeigneten Ladegerätes 80 (Fig. 7) verbindet. Das elektrische Ladegerät 80 besitzt zwei Eingangsklemmen 81, 82, die an eine geeignete Netzwechselstromquelle angeschlossen werden, sowie einen heruntertransformierendenIt is clear that after repeated use of the instrument the stored in the storage batteryJe 28 Energy drops to its lower limit. If so, must The battery 28 can be charged. This can be done by inserting the connector 52 in the lower cap 18 electrically connects to two output terminals of a suitable charger 80 (Fig. 7). That Electric charger 80 has two input terminals 81, 82 which are connected to a suitable AC power source as well as a step-down

-11--11-

- 11 -- 11 -

Transformator Qk mit einer Primärwicklung, die über einen Schalter 86 mit den Eingangsklemmen 8l, 82 verbunden ist. Die Sekundärwicklung des Transformators 84 ist mit zwei Weehselstrom-Eingangsklemmen einer Gleiohrichterbrücke verbunden, die vier Halbleiterdioden enthält. Die Brücke 88 igt sit zviei Gleich-st-rom-Ausgangsklemmen 89, 90 versehen. Transformer Qk with a primary winding which is connected to the input terminals 81, 82 via a switch 86. The secondary winding of the transformer 84 is connected to two alternating current input terminals of a rectifier bridge which contains four semiconductor diodes. The bridge 88 is fitted with two direct current output terminals 89 , 90.

Wenn die Ausgangsklemmen 89, 90 mit dem Kontaktstift 52^ bzw. dem becherförmigen Kontaktblech 55 des Anschlusses 52 verbunden sind, kann die Batterie 28 durch das Ladegerät 80 voll aufgeladen werden. Das Ladegerät 80 wird dabei durch eine äußere Wechselstromquelle über den geschlossenen Schalter 86 erregt. Dann kann der Anschluß 52 von den Ausgangsklemmen 89, 90 des Gerätes 80 gelöst und das Instrument wieder in Betrieb genommen werden.When the output terminals 89, 90 are connected to the contact pin 5 2 ^ or the cup-shaped contact plate 55 of the connection 52, the battery 28 can be fully charged by the charger 80. The charger 80 is excited by an external alternating current source via the closed switch 86. The connection 52 can then be released from the output terminals 89, 90 of the device 80 and the instrument can be put into operation again.

Die Neuerung hat einige Vorteile. Sie macht z.B. den bisher benötigtes großen zahnärztlichen Elektromotor bzw. den Luftverdichter mit den dazugehörigen Teilen überflüssig und ersetzt ihn durch den MiniaturgleiGhstrommotor zum Antrieb des Bohrers bzw. des Stabes. Der Motor wird von der Lagerbatterie angetrieben und seine Drehung mit Hilfe eines Übertragungsmechanismus auf die Bohrspitze übertragen. Alle Mittel zum Antrieb der Bohrspitze befinden sich im Griff, an dessen einem Ende das Winkelstück befestigt ist. Das vorliegende, zahnärztliche Instrument ist also klein, billig und einfach in der Herstellung. Es erfordert weder einen endlosen Riemen mit dem dazugehörigen Arm noch einen Schlauch, wodurch der Arbeitsbereich des Zahnarztes vergrößert wird. Ferner erlaubt das Instrument dem Zahnarzt, bei der Behandlung eines be-The innovation has a number of advantages. For example, it makes the large dental electric motor that was previously required or the air compressor with the associated parts superfluous and replaces it with the miniature floating current motor to drive the drill or the rod. The motor is driven by the storage battery and its rotation transferred to the drill bit with the help of a transfer mechanism. All means to drive the drill bit are located in the handle, at one end of which the elbow is attached. The present dental instrument so it is small, cheap and easy to manufacture. It neither requires an endless belt with the accompanying one Arm another hose, which increases the dentist's workspace. Also allowed the instrument to the dentist, when treating a

-12--12-

stimmten Zahnes eine angenehme Stellung einzunehmen. Der Zahnarzt ermüdet daher bei Verwendung des neuerungsgemäßen Instrumentes wesentlich langsamer als bei Verwendung von bekannten Instrumenten.agreed tooth to take a comfortable position. The dentist is therefore tired when using the innovation according to the invention Instrument much slower than when using known instruments.

Da der Motor 22, die Batterie 28 und das Winkelstück 38 auf einer gemeinsamen Längsachse liegen und der diese Teile enthaltende Griff 10 die Form eines Bleistiftes hat, kann das Instrument mit dem Griff auf den Fingerwurzeln des Zeigefingers und Daumens der rechten Hand aufliegen und auf diese Weise leicht gehandhabt werden. Gleichzeitig wird das Drehmoment des Motors unmittelbar über den Schaft ^O auf dem Winkelstück 38, der mit der Motorwelle 2*4- auf einer gemeinsamen Linie liegt, auf die Bohrspitze übertragen, wodurch der Energieverlust herabgesetzt- wird,As the motor 22, the battery 28 and the elbow 38 lie on a common longitudinal axis and the handle 10 containing these parts is in the form of a pencil the instrument can be handled with the grip on the roots of the index finger and thumb of the right hand and can thus be easily handled. At the same time, the torque of the engine is immediate over the shaft ^ O on the elbow 38, which is connected to the Motor shaft 2 * 4- lies on a common line on which Transferring the drill bit, which reduces the energy loss,

Da die Lagerbatterie 28 als Stromquelle dient und der Anschluß 52 für die Ladung der Batterie auf dem Griff iO angeordnet ist, kann die Batterie -während der Nacht voll aufgeladen und am Tag im Behandlungsraum je nach Bedarf eingesetzt werden. Überdies kann ein Zahnarzt das Instrument bei sich tragen und einen Patienten zu Hause behandeln. Außerdem ist es möglich, die Batteria aufzuladen, ohne sie aus dem Griff herauszunehmen.Since the storage battery 28 serves as a power source and the connection 52 for charging the battery on the handle OK, the battery can be used during the night fully charged and used during the day in the treatment room as required. In addition, a dentist can use the instrument carry with you and treat a patient at home. It is also possible to charge the battery, without taking it out of the handle.

Wie oben erwähnt, ist der Schalter 60 zum Inbetriebsetzen des Motors 22 auf dem breiten Ende des spitz zulaufenden Abschnittes I^ angeordnet. Der Motor 22 wird nur dann erregt, wenn der Schiter 60 mit der Hand in seiner Schließstellung gedrückt wird. Der Schalter 60 kann mit den Fingern betätigt werden, während sich das Winkelstück 38 im Mund des Patienten befindet. Das erfindungsgemäßeAs mentioned above, the switch 60 for starting the motor 22 is on the wide end of the tapered one Section I ^ arranged. The motor 22 is only energized when the Schiter 60 with his hand in his Closed position is pressed. The switch 60 can be operated with the fingers while the elbow is on 38 is in the patient's mouth. The inventive

-13--13-

I Instrument ist daher im Betrieb äußerst praktisch im Ge- f gensatz zu bekannten Geräten mit Fußschalter, der in Schließstellung gedrückt werden muß, wenn das Winkelstück im Mund des Patienten ist. Das neuerungsgemäße Instrument '' wird durch Loslassen des Druckknopfes 63 ausgeschaltet, wodurch die Gefahr einer Verletzung des Patienten ausgeschaltet ist. Die Neuerung gewährt also ein hohes Maß an Sicherheit. The instrument is therefore extremely practical in operation in contrast to known devices with a foot switch, which must be pressed into the closed position when the contra-angle handpiece is in the patient's mouth. The instrument according to the invention '' is switched off by releasing the push button 63, which eliminates the risk of injury to the patient. The innovation therefore guarantees a high level of security.

Der Regelmechanismus 26 verhindert, daß sich der Motor 22 mit einer zu hohen Geschwindigkeit dreht und ermöglicht dadurch eine Übertragung des Drehmomentes vom Motor bei im wesentlichen konstanter Umdrehungsgeschwindigkeit des Motors, selbst wenn sich die Belastung der Bohrspitze des Winkelstücks 38 ändert. Ferner kanncELe Menge des ausgebohrten Zahnbeins im wesentlichen konstant gehalten werden, was dem Patienten durch übermäßiges Ausbohren bedingte Schmerzen erspart.The control mechanism 26 prevents the engine 22 rotates at too high a speed and thereby enables the torque to be transmitted from the Motor at a substantially constant rotational speed of the motor, even if the load of the Drill tip of the elbow 38 changes. Furthermore, cELe The amount of dentin drilled out can be kept essentially constant, which the patient suffers from excessive Boring-related pain is saved.

Wie oben beschrieben, wirken die Einkerbungen 6^-67 auf dem spitz zulaufenden Abschnitt ΐΛ mit dem Vorsprung 68 auf dem Winkelstück 38 zusammen ind ermöglichen die Einstellung des Winkelstücks 38 auf dem Griff 10 in einer der vorbestimmten Stellungen. Sollen nun zwei verschiedene Zähne hintereinander ausgebohrt werden, braucht man nur die Richtung des Winkelstücks 38 zu ändern, wobei die Ausrichtung des Druckknopfschalters 60 unverändert bleibt. Der das Instrument verwendende Zahnarzt kann daher mit einom Finger einen gleichbleibenden Druck auf den Schalter 60 ausüben.As described above, the notches 6 ^ -67 work on the tapered section ΐΛ with the projection 68 on the elbow 38 together allow the ind Adjustment of the elbow 38 on the handle 10 in one of the predetermined positions. Should now be two different Teeth are drilled out one behind the other, you only need to change the direction of the elbow 38, with the Orientation of the push button switch 60 remains unchanged. The dentist using the instrument can therefore Apply constant pressure on switch 60 with a finger.

Es ist nun ersichtlich, daß die Drehwelle ^2 des Winkelstücks 38 bei Drehung des letzteren in bezug aufIt can now be seen that the rotating shaft ^ 2 des Elbow 38 when rotating the latter with respect to

-1Λ--1Λ-

den Griff 10 nicht ganz genau nach der Achse der Motorwelle 24 aasgerichtet ist. Wenn dies der Fall ist, ermöglicht die vorliegende Neuerung die wirksame Übertragung des Drehmomentes vom Motor auf die Drehwelle 42 des Winkelstücks 38 über den Kreuzstab 46, der in die Schlitze 78 im Kupplungsteil ?4 eingreift.the handle 10 is not aligned exactly along the axis of the motor shaft 24. If so, allow the present innovation is the effective transmission of the torque from the motor to the rotating shaft 42 of the elbow 38 via the cross bar 46, which engages in the slots 78 in the coupling part? 4.

Es versteht sich, daß die vorliegende Erfindung nicht auf das dargestellte und beschriebene Ausführungsbeispfel beschränkt ist, sondern innerhalb des Umfangs der beigefügten Ansprüche zahlreiche Abänderungen zuläßt.It goes without saying that the present invention does not stop at the embodiment example shown and described but is subject to numerous modifications within the scope of the appended claims.

-15--15-

i? /? A O ^ Oi? /? A O ^ O

υυυο c o υυυο co

Claims (1)

SchutzansprücheProtection claims 1. Tragbares zahnärztliches Instruments gekennzeichnet durch einen bleistiftförmigen Griff (10), ein an einem Ende des Griffes befestigtes Winkelstück (38) mit einer Drehwelle (^2) und einem auswechselbaren Bohrelement (50)i einen im Griff angeordneten Miniaturgleichstrommotor (22), einer ebenfalls im Griff angeordneten Stromquelle (28) zur Erregung des Motors, durch die das Drehmoment des Motors übsr die Drehwelle auf das Bohrelement übertragbar ist, sowie durch Ausrichtung der Längsachsen der Stromquelle und des Motors auf einer gemeinsamen Linie mit der Achse &r Drehwelle.1. Portable dental instrument characterized by a pencil-shaped handle (10), an angle piece (38) attached to one end of the handle with a rotating shaft (^ 2) and an exchangeable one Drilling element (50) i a miniature DC motor arranged in the handle (22), a power source (28) also arranged in the handle to excite the motor which the torque of the motor can be transmitted to the drilling element via the rotary shaft, as well as by alignment the longitudinal axes of the power source and the motor on a common line with the axis & r rotating shaft. 2. Instrument nach Anspruch 1, dadurch g e k e η η -2. Instrument according to claim 1, characterized in that g e k e η η - ζ e i c h η et , daß die Stromqelle eine Lagerbatterie (28) ist, und daß an dem anderen Griffende ein Anschluß (52) zum Aufladen der Lagerbatterie mittels einer außerhalb befindlichen Gleichstromquelle vorgesehen ist.ζ e i c h η et that the power source is a storage battery (28) is, and that at the other end of the handle a connection (52) is provided for charging the storage battery by means of an external direct current source. 3. Instrument nach einem der Ansprüche 1 oder 2j dadurch gekennzei chnet , daß an dem spitz zulaufenden Abschnitt (f+) des Griffes (10) ein normalerweise offener Druckknopfschalter (60) angeordnet ist, und daß der Motor (22) nur bei manuellem Eindrücken des Schalters erregt ist.3. Instrument according to one of claims 1 or 2j gekennzei chnet that on the tapered portion (f +) of the handle (10) a normally open push-button switch (60) is arranged, and that the motor (22) only when the manual pressing of the Switch is energized. ^. Instrument nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet , daß ein unmittelbar mit dem hotor (22) verbundener Regelmechanismus (26) zum Aufrechterhalten einer vorbestimmten Drehgeschwindigkeit des Motors bzw. einer unter der vorbestimmten Geschwindigkeit liegenden Geschwindigkeit vorgesehen ist.^. Instrument according to one of the preceding claims, characterized in that a regulating mechanism (26) directly connected to the rotor (22) for maintaining the motor rotating at a predetermined speed or below the predetermined speed lying speed is provided. -16--16- 5· Instrument nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß Mittel (64-6?, 68) zur wahlweisen Peststellung des Winkelstückes (38) auf dem Griff (10) in vorbestimmten Stellungen vorgesehen sind, und daß diese Feststellung durch Drehung des Winkelstückes um seine eigene Achse in bezug auf den Griff erreichbar ist.5 · Instrument according to one of the preceding claims, characterized in that means (64-6 ?, 68) for the optional position of the elbow (38) on the handle (10) in predetermined positions are provided, and that this determination by rotating the elbow around its own axis with respect to the handle is within reach. 6. Instrument nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß an dem freien Ende der Drehvrelle (^2) des Winkelstückes (38) ein von der Welle bilateral abstehender Kreuzstab (46) angeordnet ist, daß der Motor (22) eine mit einem ihrer Enden starr an einem Kupplungsteil (7^) befestigte Antriebswelle (22O besitzt, und daß im gegenüberliegenden Endabschnitt des Kupplungsteiles eine zentrale, die Drehwelle aufnehmende Axialbohrung (76) mit zwei den Kreuzstab aufnehmenden, einander diametral gegenüberliegenden Schlitzen ausgebildet ist.6. Instrument according to one of the preceding claims, characterized in that at the free end of the rotary shaft (^ 2) of the angle piece (38) a bilaterally protruding from the shaft cross bar (46) is arranged, that the motor (22) one with a its ends rigidly attached to a coupling part (7 ^) has drive shaft (2 2 O, and that in the opposite end portion of the coupling part a central, the rotary shaft receiving axial bore (76) with two diametrically opposed slots receiving the cross bar. A AA A
DE6603784U 1966-10-01 1967-10-02 PORTABLE DENTAL INSTRUMENT Expired DE6603784U (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP9183966 1966-10-01
JP9183666 1966-10-01
JP9183566 1966-10-01
JP9183866 1966-10-01
JP9183766 1966-10-01
JP9183466 1966-10-01

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Publication number Publication date
GB1201927A (en) 1970-08-12
US3509629A (en) 1970-05-05

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