WO1994015541A1 - Dental handpiece - Google Patents

Dental handpiece Download PDF

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Publication number
WO1994015541A1
WO1994015541A1 PCT/AT1993/000187 AT9300187W WO9415541A1 WO 1994015541 A1 WO1994015541 A1 WO 1994015541A1 AT 9300187 W AT9300187 W AT 9300187W WO 9415541 A1 WO9415541 A1 WO 9415541A1
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WO
WIPO (PCT)
Prior art keywords
tool
spring
holding
holding device
pivot pin
Prior art date
Application number
PCT/AT1993/000187
Other languages
German (de)
French (fr)
Inventor
Wolfgang Beck
Original Assignee
Imtec Innovative Medizintechnik Gesellschaft M.B.H.
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 Imtec Innovative Medizintechnik Gesellschaft M.B.H. filed Critical Imtec Innovative Medizintechnik Gesellschaft M.B.H.
Priority to JP6515525A priority Critical patent/JPH08507443A/en
Priority to EP94900628A priority patent/EP0679072A1/en
Publication of WO1994015541A1 publication Critical patent/WO1994015541A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/08—Machine parts specially adapted for dentistry
    • A61C1/14—Tool-holders, i.e. operating tool holders, e.g. burr holders
    • A61C1/141—Tool-holders, i.e. operating tool holders, e.g. burr holders in an angled handpiece

Definitions

  • the invention relates to a holding device for a tool that can be used in a head housing of a dental handpiece, in the plugging end of which engages in the operating state at least one holding part, which counteracts the action by means of a pivot pin parallel to the tool by means of a push button closing the housing a spring for releasing the tool is pivotable.
  • Holding devices have become known for the form-fitting mounting, in particular of rotating dental tools (cf. FR-A 891 672, EP-Bl 0 037 021), in which the holding part engaging in the annular groove is rigidly connected to a spring, which is used to release the tool the push button is deformed.
  • the spring In devices of this type, the spring must be sufficiently thick to exert the necessary forces, especially if the holder is provided with tools rotating at high speed. This means that there is only an extremely small difference between the engagement position and the release position of the holding parts, which does not guarantee perfect functioning.
  • EP-A 0 470 324 has therefore already proposed a device with the features outlined above.
  • the pivotable arrangement of the holding part ensures a clear fixation or release of the tool.
  • the spring surrounds the holding part on the outside, so that there is such a space requirement that the entire holding device must be arranged in a fixed manner in the head housing. This leads to sliding friction between the tool and the holding Part, which is particularly unacceptable at high speeds.
  • Arranged holding part and can extend in this only over part of the circumference.
  • a holding device which also rotates with the tool has been proposed in DE-PS 669 644, in which the sleeve carrying the tool is surrounded by a further displaceable sleeve which presses the balls through a recess in the inner sleeve into a groove in the tool.
  • a disadvantage of this design is that only a single ball bearing can be installed to support the very rapidly rotating tool holder. This increases the already high wear of such ball bearings.
  • the invention is intended to make it possible to avoid the disadvantages of the known devices.
  • a device should therefore be created in which there is no friction between the tool and the holding part, in which the displacement of the holding part between its two positions is sufficiently large and in which the space required to arrange a sufficiently strong spring is covered.
  • the invention achieves the stated object in that the pivot pin is connected on the one hand to the holding part and on the other hand to the spring to form a unit, the push button acting on the spring for pivoting the pivot pin and deforming it.
  • a particular advantage of the invention is that the entire holding device can be formed from a single spring wire, so that its parts form a complete structural unit in spite of different functions.
  • the holding device according to the invention can be used both for vibrating and for rotating tools.
  • a particular advantage is shown in the case of rotating tools, since the holding device can be set in rotation together with the tool. To be rotating
  • the holding device according to the invention is preferably constructed from two units constructed in mirror symmetry with respect to one another, each consisting of holding part, pivot pin and spring.
  • FIG. 1 shows the head housing for a rotating tool in longitudinal section
  • FIG. 2 shows the same housing in section along the line II-II in FIG. 4
  • FIG. 3 shows the housing in section along the line HI-III in FIG Fig. 1, 4 in section along the line IV-IV in Fig. 2
  • Fig. 5 is a diagrammatic representation of the essential part the holding device according to the invention
  • FIG. 6 shows a diagrammatic representation of the holding device together with the housing held thereby
  • FIGS. 7 and 8 illustrate the function of the holding device on representations which correspond to FIGS. 5 and 6
  • 9 shows the head housing for a vibrating tool in longitudinal section
  • FIG. 10 shows the section along line XX in FIG. 9,
  • FIG. 11 shows the section along line XI-XI in FIG. 9,
  • FIG. 12 shows a view in the direction XII-XII of Fig. 10
  • FIG. 13 shows the interaction of the holding device with a tool.
  • FIG. 14 illustrates the transition from the position according
  • a guide tube 6 for a tool is rotatably mounted in a head housing 1 by means of ball bearings 4.
  • the guide tube 6 is driven via a shaft 5, which could also be replaced by a turbine surrounding the tube 6.
  • the head housing 1 is closed by a push button 2, which is held in the raised position on the left in FIG. 1 by a spring 3.
  • the device shown serves to hold a tool 16. In the direction of rotation, its position is brought about by a flattening 17 which interacts with the guide tube 6.
  • a holding device in the form of a spring wire is used, the individual sections of which are to be addressed as a spring 7, pivot pin 8 and holding part 9.
  • the holding device is in the operating state on the left in FIG. 3.
  • the pivot 8 runs in a bore 22, the upper end of which is widened in the manner of an elongated hole, in order to thread the pivot together with the latter attached holding part 9 to allow in the flange 15 of the sleeve.
  • the spring 7 resting on the flange 15 consists of two legs 12, 12 ', which are connected to one another in an approximately V-shape and which with the approximately tangential end 13 of the leg 12' on the axially extending edge 11 of the flange 15 support.
  • the inner leg 12 of the spring 7 abuts the wedge surface 21 of the push button 2. If the push button, as shown on the right in FIG. 1, is therefore pressed inward, the leg 12 of the spring 7 moves outwards as shown on the right in FIG. 3. As a result, the pivot pin 8 is pivoted with the holding part 9 and the tool 16 is released.
  • FIG. 5 and 6 show the structure of the units consisting of spring 7, pivot pin 8 and holding part 9, whereby particular reference is made to the wedge surfaces 10 which limit the holding parts 9 downwards and thus that Allow tool 16 to be pushed into the position shown in FIG. 6, which is facilitated by corresponding wedge surfaces 19 in tool 16.
  • the holding parts 9 are fixed in the groove 18 which surrounds the tool 16 in a ring.
  • the tension of the springs 7 prevents rotation of the pivot pins 8 in the bores 22.
  • the hat-shaped sleeve 14, which carries the holding device consisting of spring wire, takes part in the movement of the tool 16.
  • FIGS. 9-14 does not differ in principle from that according to FIGS. 1-8. Since the tool 16 is to be set in a vibrating movement here, drive 23 is provided for generating these movements, but not here ein ⁇ is going, since it is not the subject of the invention.
  • the tool 16 is not held here by means of a groove 18, but the holding parts 9 engage on an annular flange 24 of the tool, as already described with reference to the first exemplary embodiment. Since this ring flange is far away from the push button 2 than the groove 18 in the first embodiment, the pivots 8 are much longer here.
  • the holding parts can be provided with flats 20.

Landscapes

  • 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)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

A securing device for a tool (16) which can be fitted into a head casing (1) of a dental handpiece, into the insertion end of which, in the operative state, can be inserted at least one securing member (9) which can be pivoted by means of a pivot pin (8) parallel to the tool (16) by a push-button (2) closing the casing (1) against the force of a spring (7) to release the tool. The pivot pin (8) is secured on one side to the securing member (9) and on the other to the spring (7) to form a unit. To pivot the pin (8) the push-button (2) engages with the spring (7) and deforms it.

Description

Zahnärztliches Handstück Dental handpiece
Die Erfindung bezieht sich auf eine Halteeinrichtung für ein in einem Kopfgehäuse eines zahnärztlichen Hand- Stückes einsetzbares Werkzeug, in dessen Einsteckende im Betriebszustand mindestens ein Halteteil eingreift, welcher mittels eines zum Werkzeug parallelen Dreh¬ zapfens durch einen das Gehäuse abschließenden Druck¬ knopf gegen die Wirkung einer Feder zur Freigabe des Werkzeuges verschwenkbar ist.The invention relates to a holding device for a tool that can be used in a head housing of a dental handpiece, in the plugging end of which engages in the operating state at least one holding part, which counteracts the action by means of a pivot pin parallel to the tool by means of a push button closing the housing a spring for releasing the tool is pivotable.
Zur formschlüssigen Halterung insbesondere rotierender zahnärztlicher Werkzeuge sind Halteeinrichtungen be¬ kanntgeworden (vgl. FR-A 891 672, EP-Bl 0 037 021), bei welchen der in die Ringnut eingreifende Halteteil starr mit einer Feder verbunden ist, welche zwecks Freigabe des Werkzeuges durch den Druckknopf verformt wird. Bei derartigen Einrichtungen muß die Feder hinreichend dick sein, um die notwendigen Kräfte aufzubringen, insbeson- dere wenn die Halterung mit hoher Drehzahl rotierender Werkzeuge vorgesehen ist. Das bedeutet, daß zwischen der Eingriffsstellung und der Freigabestellung der Hal¬ teteile nur ein äußerst geringer Unterschied besteht, welcher eine einwandfreie Funktion nicht garantiert.Holding devices have become known for the form-fitting mounting, in particular of rotating dental tools (cf. FR-A 891 672, EP-Bl 0 037 021), in which the holding part engaging in the annular groove is rigidly connected to a spring, which is used to release the tool the push button is deformed. In devices of this type, the spring must be sufficiently thick to exert the necessary forces, especially if the holder is provided with tools rotating at high speed. This means that there is only an extremely small difference between the engagement position and the release position of the holding parts, which does not guarantee perfect functioning.
In EP-A 0 470 324 wurde daher bereits eine Einrichtung mit den eingangs skizzierten Merkmalen vorgeschlagen. Durch die verschwenkbare Anordnung des Halteteiles ist dabei eine eindeutige Fixierung bzw. Freigabe des Werk- zeuges sichergestellt. Allerdings ist bei der bekannten Einrichtung vorgesehen, daß die Feder den Halteteil außen umgibt, wodurch ein derartiger Platzbedarf be¬ steht, daß die gesamte Halteeinrichtung im Kopfgehäuse feststehend angeordnet werden muß. Es kommt damit zu gleitender Reibung zwischen dem Werkzeug und dem Halte- teil, was insbesondere bei hohen Drehzahlen nicht ver¬ tretbar ist.EP-A 0 470 324 has therefore already proposed a device with the features outlined above. The pivotable arrangement of the holding part ensures a clear fixation or release of the tool. However, it is provided in the known device that the spring surrounds the holding part on the outside, so that there is such a space requirement that the entire holding device must be arranged in a fixed manner in the head housing. This leads to sliding friction between the tool and the holding Part, which is particularly unacceptable at high speeds.
Aus DE-U 8963565 ist andererseits eine mit dem Werkzeug rotierende Halteeinrichtung bekannt, bei welcher der Druckknopf an dem mit Keilflächen versehenen Halteteil angreift, sodaß dieser zwischen der Haltestellung und der Freigabestellung hinreichend weit verschoben werden kann. Die der Verschiebung in die Freigabestellung ent- gegenwirkende Feder ist hier jedoch in der Ebene desFrom DE-U 8963565, on the other hand, a holding device rotating with the tool is known, in which the push button engages on the holding part provided with wedge surfaces, so that it can be moved sufficiently far between the holding position and the release position. The spring counteracting the displacement into the release position is here in the plane of the
Halteteiles angeordnet und kann sich in dieser nur über einen Teil des Umfanges erstrecken.Arranged holding part and can extend in this only over part of the circumference.
Eine ebenfalls mit dem Werkzeug rotierende Halteein- richtung wurde in DE-PS 669 644 vorgeschlagen, bei der die das Werkzeug tragende Hülse von einer weiteren ver¬ schiebbaren Hülse umgeben ist, die Kugeln durch eine Ausnehmung der inneren Hülse in eine Nut des Werkzeuges drückt. Durch eine Verschiebung der äußeren Hülse mit- tels des Druckknopfes gegen die Kraft einer Feder kann das Werkzeug aus der inneren Hülse entfernt werden.A holding device which also rotates with the tool has been proposed in DE-PS 669 644, in which the sleeve carrying the tool is surrounded by a further displaceable sleeve which presses the balls through a recess in the inner sleeve into a groove in the tool. By moving the outer sleeve by means of the push button against the force of a spring, the tool can be removed from the inner sleeve.
Nachteilig bei dieser Ausführung ist, daß zur Lagerung der sehr schnell rotierenden Werkzeughalterung nur der Einbau eines einzelnen Kugellagers möglich ist. Der ohnehin hohe Verschleiß solcher Kugellager wird dadurch weiter verstärkt.A disadvantage of this design is that only a single ball bearing can be installed to support the very rapidly rotating tool holder. This increases the already high wear of such ball bearings.
Die Erfindung soll es ermöglichen, die Nachteile der bekannten Einrichtungen zu vermeiden. Es soll also eine Einrichtung geschaffen werden, bei welcher zwischen Werkzeug und Halteteil keine Reibung auftritt, bei wel¬ cher die Verschiebung des Halteteiles zwischen seinen beiden Positionen hinreichend groß ist und bei welcher der zur Anordnung einer hinreichend starken Feder not¬ wendige Platzbedarf gedeckt ist.The invention is intended to make it possible to avoid the disadvantages of the known devices. A device should therefore be created in which there is no friction between the tool and the holding part, in which the displacement of the holding part between its two positions is sufficiently large and in which the space required to arrange a sufficiently strong spring is covered.
Die Erfindung löst die gestellte Aufgabe dadurch, daß der Drehzapfen einerseits mit dem Halteteil, anderer¬ seits mit der Feder zu einer Einheit verbunden ist, wo¬ bei zur Verschwenkung des Drehzapfens der Druckknopf an der Feder angreift und diese verformt.The invention achieves the stated object in that the pivot pin is connected on the one hand to the holding part and on the other hand to the spring to form a unit, the push button acting on the spring for pivoting the pivot pin and deforming it.
Ein besonderer Vorteil der Erfindung liegt darin, daß die gesamte Halteeinrichtung aus einem einzigen Feder¬ draht geformt sein kann, ihre Teile trotz unterschied¬ licher Funktion also eine völlige konstruktive Einheit bilden.A particular advantage of the invention is that the entire holding device can be formed from a single spring wire, so that its parts form a complete structural unit in spite of different functions.
Die erfindungsgemäße Halteeinrichtung ist sowohl für vibrierende wie für rotierende Werkzeuge einsetzbar. Ein besonderer Vorteil zeigt sich bei rotierenden Werk¬ zeugen, da die Halteeinrichtung zusammen mit dem Werk- zeug in Drehung versetzbar ist. Um bei rotierendenThe holding device according to the invention can be used both for vibrating and for rotating tools. A particular advantage is shown in the case of rotating tools, since the holding device can be set in rotation together with the tool. To be rotating
Werkzeugen eine einseitige Lagerbelastung zu vermeiden, wird die erfindungsgemäße Halteeinrichtung vorzugsweise aus zwei spiegelsymmetrisch zueinander aufgebauten Ein¬ heiten, jeweils bestehend aus Halteteil, Drehzapfen und Feder, aufgebaut.To prevent tools from being subjected to a one-sided bearing load, the holding device according to the invention is preferably constructed from two units constructed in mirror symmetry with respect to one another, each consisting of holding part, pivot pin and spring.
Weitere Einzelheiten der Erfindung werden anschließend anhand der Zeichnung erläutert.Further details of the invention are subsequently explained with reference to the drawing.
Fig. 1 zeigt das Kopfgehäuse für ein rotierendes Werk¬ zeug im Längsschnitt, Fig. 2 das selbe Gehäuse im Schnitt nach der Linie II-II in Fig. 4, Fig. 3 das Ge¬ häuse im Schnitt nach der Linie HI-III in Fig. 1, Fig. 4 im Schnitt nach der Linie IV-IV in Fig. 2; Fig. 5 ist eine schaubildliche Darstellung des wesentlichen Teiles der erfindungsgemäßen Halteeinrichtung, Fig. 6 eine schaubildliche Darstellung der Halteinrichtung samt dem dadurch festgehaltenen Gehäuse, Fig. 7 und 8 illustrie¬ ren die Funktion der Halteeinrichtung an Darstellungen, welche Fig. 5 und 6 entsprechen; Fig. 9 zeigt das Kopf- gehäuse für ein vibrierendes Werkzeug im Längsschnitt, Fig. 10 den Schnitt nach der Linie X-X in Fig. 9, Fig. 11 den Schnitt nach der Linie XI-XI in Fig. 9, Fig. 12 eine Ansicht in Richtung XII-XII von Fig. 10; Fig. 13 zeigt das Zusammenwirken der Halteeinrichtung mit einem Werkzeug, Fig. 14 illustriert den Übergang von der Po¬ sition nach Fig. 13 in den Öffnungszustand.1 shows the head housing for a rotating tool in longitudinal section, FIG. 2 shows the same housing in section along the line II-II in FIG. 4, FIG. 3 shows the housing in section along the line HI-III in FIG Fig. 1, 4 in section along the line IV-IV in Fig. 2; Fig. 5 is a diagrammatic representation of the essential part the holding device according to the invention, FIG. 6 shows a diagrammatic representation of the holding device together with the housing held thereby, FIGS. 7 and 8 illustrate the function of the holding device on representations which correspond to FIGS. 5 and 6; 9 shows the head housing for a vibrating tool in longitudinal section, FIG. 10 shows the section along line XX in FIG. 9, FIG. 11 shows the section along line XI-XI in FIG. 9, FIG. 12 shows a view in the direction XII-XII of Fig. 10; FIG. 13 shows the interaction of the holding device with a tool. FIG. 14 illustrates the transition from the position according to FIG. 13 to the open state.
Bei der in Fig. 1 dargestellten Einrichtung ist in üb- licher Weise ein Fuhrungsröhrchen 6 für ein Werkzeug mittels Kugellagern 4 drehbar in einem Kopfgehäuse 1 gelagert. Der Antrieb des Führungsröhrchens 6 erfolgt über eine Welle 5, welche auch durch eine das Röhrchen 6 umgebende Turbine ersetzt sein könnte. Abgeschlossen wird das Kopfgehäuse 1 durch einen Druckknopf 2, wel¬ cher durch eine Feder 3 in der abgehobenen Stellung links in Fig. 1 gehalten wird. Wie insbesondere aus Fig. 2 hervorgeht, dient die dargestellte Einrichtung dazu, ein Werkzeug 16 festzuhalten. In Drehrichtung wird dessen Lage durch eine mit dem Fuhrungsröhrchen 6 zusammenwirkende Abflachung 17 bewirkt. Zur Sicherung des Werkzeuges 16 in Axialrichtung dient eine Halte¬ einrichtung in Form eines Federdrahtes, dessen einzelne Abschnitte als Feder 7, Drehzapfen 8 und Halteteil 9 anzusprechen sind.In the device shown in FIG. 1, a guide tube 6 for a tool is rotatably mounted in a head housing 1 by means of ball bearings 4. The guide tube 6 is driven via a shaft 5, which could also be replaced by a turbine surrounding the tube 6. The head housing 1 is closed by a push button 2, which is held in the raised position on the left in FIG. 1 by a spring 3. As can be seen in particular from FIG. 2, the device shown serves to hold a tool 16. In the direction of rotation, its position is brought about by a flattening 17 which interacts with the guide tube 6. To secure the tool 16 in the axial direction, a holding device in the form of a spring wire is used, the individual sections of which are to be addressed as a spring 7, pivot pin 8 and holding part 9.
Links in Fig. 3 befindet sich die Halteeinrichtung im Betriebszustand. Der Drehzapfen 8 verläuft dabei in einer Bohrung 22, deren oberes Ende langlochartig er- weitert ist, um das Einfädeln des Drehzapfens samt dem daran befestigten Halteteil 9 in den Flansch 15 der Hülse zu ermöglichen. Die auf dem Flansch 15 auf¬ liegende Feder 7 besteht aus zwei Schenkeln 12, 12', die etwa V-förmig miteinander verbunden sind und sich mit dem etwa tangential verlaufenden Ende 13 des Schen¬ kels 12 ' am axial verlaufenden Rand 11 des Flansches 15 abstützen. Der Innenschenkel 12 der Feder 7 liegt an der Keilfläche 21 des Druckknopfes 2 an. Wird daher der Druckknopf, wie rechts in Fig. 1 dargestellt, nach in- nen gedrückt, so wandert der Schenkel 12 der Feder 7 gemäß der Darstellung rechts in Fig. 3 nach außen. Da¬ durch wird der Drehzapfen 8 mit dem Halteteil 9 ver¬ schwenkt und das Werkzeug 16 freigegeben.The holding device is in the operating state on the left in FIG. 3. The pivot 8 runs in a bore 22, the upper end of which is widened in the manner of an elongated hole, in order to thread the pivot together with the latter attached holding part 9 to allow in the flange 15 of the sleeve. The spring 7 resting on the flange 15 consists of two legs 12, 12 ', which are connected to one another in an approximately V-shape and which with the approximately tangential end 13 of the leg 12' on the axially extending edge 11 of the flange 15 support. The inner leg 12 of the spring 7 abuts the wedge surface 21 of the push button 2. If the push button, as shown on the right in FIG. 1, is therefore pressed inward, the leg 12 of the spring 7 moves outwards as shown on the right in FIG. 3. As a result, the pivot pin 8 is pivoted with the holding part 9 and the tool 16 is released.
Aus Fig. 5 und 6 ist der Aufbau der aus Feder 7, Dreh¬ zapfen 8 und Halteteil 9 bestehenden Einheiten ersicht¬ lich, wobei besonders auf die Keilflächen 10 hinge¬ wiesen wird, welche die Halteteile 9 nach unten begren¬ zen und damit das Einschieben des Werkzeuges 16 in die in Fig. 6 dargestellte Lage erlauben, was durch korres¬ pondierende Keilflächen 19 im Werkzeug 16 erleichtert wird.5 and 6 show the structure of the units consisting of spring 7, pivot pin 8 and holding part 9, whereby particular reference is made to the wedge surfaces 10 which limit the holding parts 9 downwards and thus that Allow tool 16 to be pushed into the position shown in FIG. 6, which is facilitated by corresponding wedge surfaces 19 in tool 16.
In dem in Fig. 6 dargestellten Betriebszustand sind die Halteteile 9 fest in der Nut 18 gelagert, welche das Werkzeug 16 ringförmig umgibt. Durch die Spannung der Federn 7 ist eine Verdrehung der Drehzapfen 8 in den Bohrungen 22 ausgeschlossen Die hutförmige Hülse 14, welche die aus Federdraht bestehende Halteeinrichtung trägt, nimmt an der Bewegung des Werkzeuges 16 teil.In the operating state shown in Fig. 6, the holding parts 9 are fixed in the groove 18 which surrounds the tool 16 in a ring. The tension of the springs 7 prevents rotation of the pivot pins 8 in the bores 22. The hat-shaped sleeve 14, which carries the holding device consisting of spring wire, takes part in the movement of the tool 16.
Die beim Entfernen des Werkzeuges 16 entstehende Sprei¬ zung der Halteteile 9 durch die Keilflächen 21 des Druckknopfes 2 ergibt sich besonders einfach aus Fig. 7 und 8. Die Einrichtung nach Fig. 9 - 14 unterscheidet sich prinzipiell nicht von jener nach Fig. 1 - 8. Da das Werkzeug 16 hier in eine vibrierende Bewegung versetzt werden soll, ist zur Erzeugung dieser Bewegungen An- trieb 23 vorgesehen, auf den hier nicht näher ein¬ gegangen wird, da er nicht Gegenstand der Erfindung ist. Das Werkzeug 16 wird hier nicht mittels einer Nut 18 festgehalten, sondern die Halteteile 9 greifen so wie bereits anhand des ersten Ausführungsbeispieles be- schrieben, an einem Ringflansch 24 des Werkzeuges an. Da dieser Ringflansch wesentlich weiter vom Druckknopf 2 entfernt ist als die Nut 18 im ersten Ausführungs¬ beispiel, sind hier die Drehzapfen 8 wesentlich länger. Da das Werkzeug 16 nicht gedreht wird, steht anderer- seits wesentlich mehr Raum für die Anbringung der Fe¬ dern 7 und der Halteteile 9 zur Verfügung, wie sich aus Fig. 11 - 14 ergibt. Um die Kontaktfläche zwischen Hal¬ teteilen 9 und Werkzeug 16 zu vergrößern, können die Halteteile mit Abflachungen 20 versehen werden. The spreading of the holding parts 9 by the wedge surfaces 21 of the push button 2 that occurs when the tool 16 is removed can be seen particularly easily from FIGS. 7 and 8. The device according to FIGS. 9-14 does not differ in principle from that according to FIGS. 1-8. Since the tool 16 is to be set in a vibrating movement here, drive 23 is provided for generating these movements, but not here ein¬ is going, since it is not the subject of the invention. The tool 16 is not held here by means of a groove 18, but the holding parts 9 engage on an annular flange 24 of the tool, as already described with reference to the first exemplary embodiment. Since this ring flange is far away from the push button 2 than the groove 18 in the first embodiment, the pivots 8 are much longer here. On the other hand, since the tool 16 is not rotated, there is considerably more space available for the attachment of the springs 7 and the holding parts 9, as can be seen from FIGS. 11-14. In order to enlarge the contact area between holding parts 9 and tool 16, the holding parts can be provided with flats 20.

Claims

P a t e n t a n s p r ü c h e : Patent claims:
1. Halteeinrichtung für ein in einem Kopfgehäuse eines zahnärztlichen Handstückes einsetzbares1. Holding device for a insertable in a head housing of a dental handpiece
Werkzeug, in dessen Einsteckende im Betriebszu- stand mindestens ein Halteteil eingreift, welcher mittels eines zum Werkzeug parallelen Drehzapfens durch einen das Gehäuse abschließenden Druckknopf gegen die Wirkung einer Feder zur Freigabe desTool, in the inserting end of which engages in the operating state at least one holding part which, by means of a pivot pin parallel to the tool, against the action of a spring for releasing the
Werkzeuges verschwenkbar ist, dadurch gekennzeich¬ net, daß der Drehzapfen (8) einerseits mit dem Halteteil (9) , andererseits mit der Feder (7) zu einer Einheit verbunden ist, wobei zur Verschwen- kung des Drehzapfens (8) der Druckknopf (2) an der Feder (7) angreift und diese verformt.Tool can be pivoted, characterized in that the pivot pin (8) is connected on the one hand to the holding part (9) and on the other hand to the spring (7) to form a unit, the push button (2) being used to pivot the pivot pin (8) ) engages the spring (7) and deforms it.
2. Halteeinrichtung nach Anspruch 1, dadurch gekenn¬ zeichnet, daß zwei Einheiten aus Halteteil (9) , Drehzapfen (6) und Feder (7) spiegelsymmetrisch angeordnet sind.2. Holding device according to claim 1, characterized gekenn¬ characterized in that two units of holding part (9), pivot (6) and spring (7) are arranged mirror-symmetrically.
3. Halteeinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß sie mit dem Werkzeug (16) zusammen in Drehung versetzbar ist.3. Holding device according to claim 1 or 2, characterized in that it can be rotated together with the tool (16).
4. Halteeinrichtung nach Anspruch 3, dadurch gekenn¬ zeichnet, daß die Halteteile (9) mit dem Ende des Werkzeuges (16) bei dessen Einführung zusa men- wirkende Keilflächen (10) aufweisen. 4. Holding device according to claim 3, characterized gekenn¬ characterized in that the holding parts (9) with the end of the tool (16) have co-acting wedge surfaces (10) when it is inserted.
PCT/AT1993/000187 1993-01-15 1993-12-07 Dental handpiece WO1994015541A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP6515525A JPH08507443A (en) 1993-01-15 1993-12-07 Dental handpiece
EP94900628A EP0679072A1 (en) 1993-01-15 1993-12-07 Dental handpiece

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT5293A AT399451B (en) 1993-01-15 1993-01-15 DENTAL HANDPIECE
ATA52/93 1993-01-15

Publications (1)

Publication Number Publication Date
WO1994015541A1 true WO1994015541A1 (en) 1994-07-21

Family

ID=3480259

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT1993/000187 WO1994015541A1 (en) 1993-01-15 1993-12-07 Dental handpiece

Country Status (4)

Country Link
EP (1) EP0679072A1 (en)
JP (1) JPH08507443A (en)
AT (1) AT399451B (en)
WO (1) WO1994015541A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0830849A1 (en) * 1996-09-23 1998-03-25 Siemens Aktiengesellschaft Dental handpiece with tool-receiving head and device for holding and axially securing a tool
FR2858540A1 (en) * 2003-08-04 2005-02-11 Micro Mega Int Mfg Sa Canal preparation device for dental canal treatment, has canal instrument with shaft equipped with rotational driving unit and head of handpiece provided at base with detenting mechanism
CN104783911A (en) * 2015-04-27 2015-07-22 桂林市啄木鸟医疗器械有限公司 Push type dental handpiece with optimized rear cover structure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3403377B2 (en) * 2000-09-26 2003-05-06 株式会社ナカニシ Dental handpiece

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE687942C (en) * 1938-11-02 1940-02-09 Hermann Troesse Handpiece for dental drills with a rotating body designed clamping sleeve for the tool
EP0056266A1 (en) * 1981-01-10 1982-07-21 Gustav Neuhäuser oHG Präzisionswerkzeugfabrik Quick release chuck
US4536157A (en) * 1984-11-21 1985-08-20 Sybron Corporation Lever actuated chuck mechanism for dental handpiece
EP0420169A1 (en) * 1989-09-26 1991-04-03 Nakanishi Dental Mfg. Co. Ltd. Chucking device for dental handpiece
EP0470324A1 (en) * 1990-08-07 1992-02-12 Nakanishi Dental Mfg. Co. Ltd. Chucking device for dental handpiece

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE969644C (en) * 1953-01-13 1958-07-10 Marcel Garnier Elbow for dental drills
DE1064196B (en) * 1958-04-26 1959-08-27 Siemens Reiniger Werke Ag Dental drill handpiece
AT280465B (en) * 1967-07-13 1970-04-10 Kaltenbach & Voigt Dental turbine handpiece
DE3008297C2 (en) * 1980-03-04 1982-12-16 Kaltenbach & Voigt Gmbh & Co, 7950 Biberach Dental or dental technical vibration contra-angle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE687942C (en) * 1938-11-02 1940-02-09 Hermann Troesse Handpiece for dental drills with a rotating body designed clamping sleeve for the tool
EP0056266A1 (en) * 1981-01-10 1982-07-21 Gustav Neuhäuser oHG Präzisionswerkzeugfabrik Quick release chuck
US4536157A (en) * 1984-11-21 1985-08-20 Sybron Corporation Lever actuated chuck mechanism for dental handpiece
EP0420169A1 (en) * 1989-09-26 1991-04-03 Nakanishi Dental Mfg. Co. Ltd. Chucking device for dental handpiece
EP0470324A1 (en) * 1990-08-07 1992-02-12 Nakanishi Dental Mfg. Co. Ltd. Chucking device for dental handpiece

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0830849A1 (en) * 1996-09-23 1998-03-25 Siemens Aktiengesellschaft Dental handpiece with tool-receiving head and device for holding and axially securing a tool
FR2858540A1 (en) * 2003-08-04 2005-02-11 Micro Mega Int Mfg Sa Canal preparation device for dental canal treatment, has canal instrument with shaft equipped with rotational driving unit and head of handpiece provided at base with detenting mechanism
WO2005023134A1 (en) * 2003-08-04 2005-03-17 Micro Mega International Manufactures Device for canal preparation
CN104783911A (en) * 2015-04-27 2015-07-22 桂林市啄木鸟医疗器械有限公司 Push type dental handpiece with optimized rear cover structure

Also Published As

Publication number Publication date
JPH08507443A (en) 1996-08-13
AT399451B (en) 1995-05-26
EP0679072A1 (en) 1995-11-02
ATA5293A (en) 1994-10-15

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