EP1887962A1 - Piece a main a pieces mues ou mobiles dotees d'un revetement - Google Patents

Piece a main a pieces mues ou mobiles dotees d'un revetement

Info

Publication number
EP1887962A1
EP1887962A1 EP06742967A EP06742967A EP1887962A1 EP 1887962 A1 EP1887962 A1 EP 1887962A1 EP 06742967 A EP06742967 A EP 06742967A EP 06742967 A EP06742967 A EP 06742967A EP 1887962 A1 EP1887962 A1 EP 1887962A1
Authority
EP
European Patent Office
Prior art keywords
handpiece
coating
tool
dental
components
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.)
Withdrawn
Application number
EP06742967A
Other languages
German (de)
English (en)
Inventor
Rainer Hofer
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.)
Kaltenbach and Voigt GmbH
Original Assignee
Kaltenbach and Voigt GmbH
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 Kaltenbach and Voigt GmbH filed Critical Kaltenbach and Voigt GmbH
Priority to EP06742967A priority Critical patent/EP1887962A1/fr
Publication of EP1887962A1 publication Critical patent/EP1887962A1/fr
Withdrawn legal-status Critical Current

Links

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
    • A61C1/10—Straight hand-pieces
    • 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
    • A61C1/12—Angle hand-pieces
    • 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
    • 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
    • A61C1/18—Flexible shafts; Clutches or the like; Bearings or lubricating arrangements; Drives or transmissions
    • A61C1/185—Drives or transmissions

Definitions

  • the present invention relates to a handpiece according to the preamble of claim 1, which has a drive mechanism for a tool to be held by the handpiece, wherein moving or movable parts of the handpiece are at least partially provided with a coating.
  • the present invention relates to a handpiece which is intended for medical, dental or dental technical purposes.
  • Dental or dental handpieces exist in various embodiments.
  • the handpieces can be distinguished both by their shape and arrangement of the tools to be operated as well as in terms of the drive mechanism used for use.
  • handpieces are often used for the production of dental prostheses, in which the tool is arranged in the direction of the longitudinal axis of the handpiece.
  • dental or dental handpieces have in common that the moving or moving parts located therein are exposed to a relatively high load. It should also be noted that these are mainly miniaturized components, since the cramped space within the handpieces use large-volume Do not allow components. However, the smaller the components used, the more difficult it is for them to bear the loads occurring during operation or use of the handpiece. Components that are subjected to a particularly high load, for example, all components of the drive mechanism, which are responsible for transmitting a rotation to the tool or generally for a movement of the tool.
  • WO 03/071973 Al In order to reduce the wear of the various components of a clamping device, it is proposed in WO 03/071973 Al to provide the components of a clamping device of a dental handpiece with a coating comprising graphite or chromium nitrate.
  • a coating comprising graphite or chromium nitrate.
  • DLC diamond-like or diamond-like hard material layers
  • Another feature of the coatings described in WO 03/071973 A1 is that they counteract corrosion of the components of the clamping device.
  • WO 2004/056280 Al The coating of certain components of a dental handpiece is also described in WO 2004/056280 A1. In this case, however, care is taken in the first place that the coating leads to a reduction of the friction and accordingly can be dispensed with an excessive lubrication of the various handpiece components. Accordingly, it is proposed in WO 2004/056280 Al to provide mutually moving parts of a dental handpiece with a coating which has a lubricant. As a particularly preferred embodiment, in turn, the use of diamond-like carbon layers DLC is called.
  • the present invention seeks to provide a novel designed handpiece especially for medical, dental or dental technology purposes, which has further improved properties in terms of its moving or moving parts.
  • the central idea of the present invention is to provide moving or movable parts of the handpiece with a coating comprising chromium nitride (CrN) and / or titanium.
  • Nitride + gold TiN + Au
  • a novel coating is used, since experiments have shown that chromium nitride or the combination of titanium nitride + gold compared to the The above-mentioned coatings bring further improved properties, in particular with regard to use in the dental or dental technology sector. Further advantages result from the fact that the coating of the components with chromium nitride or titanium nitride + gold can be carried out with a very high accuracy and, in particular, reliably and reproducibly.
  • a handpiece is proposed with a drive mechanism for a tool to be held by the handpiece, in particular for medical, dental or dental technology purposes, wherein moving or movable parts of the handpiece are at least partially provided with a coating and according to the invention, the coating comprises chromium nitride and / or titanium nitride + gold.
  • the handpiece on a clamping device for selectively clamping a to be moved by the drive mechanism, in particular to be set in rotation tool, wherein elements of this clamping device with the provided according to the invention used chromium nitride coating or titanium nitride + gold coating.
  • a second preferred embodiment of the present invention is to use a drive mechanism for the tool, which has at least one driven and rotatably mounted shaft, wherein bearing elements for the shaft and / or coupling parts for rotation transmission are provided with the coating according to the invention.
  • chromium nitride coating or titanium nitride + gold coating are two particularly preferred regions or components of the handpiece in which the chromium nitride coating or titanium nitride + gold coating according to the invention is to be used.
  • all components of the handpiece, which are subject to wear, can be provided with the coating.
  • the chromium nitride or titanium nitride + gold coating is therefore very versatile and contributes in all areas to improve the operating characteristics of the coated components and thus the handpiece as a whole.
  • the present invention is by no means limited to the use of specially designed handpieces. Rather, the chromium nitride or titanium nitride + gold coating can be used in all handpieces that are used in medical, dental or dental technology areas. The operating characteristics of both dental drill handpieces and straight motor handpieces for the laboratory can be further optimized in this way.
  • Fig. 1 shows a first embodiment in game of a dental according to the invention
  • Figure 2 shows the head portion of the handpiece of Figure 1 in vertical section.
  • 3 and 4 show another embodiment of a straight motor handpiece, which is designed according to the present invention.
  • FIGS. 1 and 2 is a handpiece, which is known from DE 196 29 902 Al the applicant. Since the design of this handpiece is already adequately described in this publication, its structure will be explained below only briefly.
  • the main parts of the handpiece 100 shown in FIGS. 1 and 2 are a grip sleeve 1 with a head housing 2 at its front end, a drive shaft section comprising two drive shafts 3, which is rotatably mounted in the grip sleeve 1 by means of corresponding bearings 3b, a drive sleeve 4 which by means of rotary bearings 5 about a rotation axis 6 rotatably mounted in the head housing 2, wherein the axis of rotation 6 preferably perpendicular to the longitudinal central axis 7 of the grip sleeve 1 extends, a drive connection between the drive shaft portion and the drive sleeve 4, here in the form of an angular gear 8 with corresponding pinions, a first clutch 9, for releasably rotational drive connection of a plug-in externally in the drive sleeve 4 shaft 11 of a rotary tool 12, a second clutch 13 for releasable axial connection of the shaft 11 with the drive sleeve 4 and an
  • the grip sleeve 1 is connectable by a plug connection 15 to a fitting 17 of a flexible supply line 18, the other end of which is connected to a supply device, not shown, for supplying the handpiece with required media, such as e.g. electrical drive power, blowing air, water and / or spray is connected.
  • a supply device not shown
  • the water and / or air and light media conduits terminate in or near the head housing 2, with their exit ports directed toward the treatment site located at the tip of the tool 12.
  • An electric drive motor 19 is arranged in a manner known per se in the connection piece 17. With the aid of the motor 19, the tool 12 is set in rotation, whereby the transmission of the motor movement to the tool 12 via the two shafts 3, located on the shafts 3 coupling elements 3a and the angle gear 8 takes place.
  • the first coupling 9 in the head housing 2 is formed by an inner projection 21 in the drive sleeve 4 with a coupling surface 22 which rests against a coupling surface 23 of the shaft 11 with little play, the coupling surface 22 by an end expiring recess or flattening of the shaft 11th is formed.
  • the inner projection 21 is formed by a circular portion-shaped coupling part which is inserted as a fitting in a groove N.
  • the second clutch 13 for axially effective connection of the shaft 11 with the drive sleeve 4 is by a coupling slide 24 which is radially slidably mounted in a radial guide slot of the drive sleeve 4 with little play, as well as at its radially inner end a coupling nose 25, and a the latter receiving coupling recess 26 formed in the shaft 11.
  • the coupling slide 24 is between a coupling position shown in FIG. 2, in which its inward movement is limited by a stop A and in which the coupling nose 25 protrudes into the hollow cylindrical insertion hole 4a of the drive sleeve 4 and a displaced to the outside decoupling position or release position displaceable, in the coupling nose 25 does not protrude into the insertion hole 4a.
  • a spring 37 acting radially inwardly is provided for automatic return of the coupling slide 24 in its coupling position.
  • the spring 37 is elastically opened when moving the coupling slide 24 in its release position, which allows their clasp-shaped or C-shape. Due to the elastic contraction, the coupling piece 24 is automatically moved into its coupling position.
  • the actuating device 14 is provided, which is arranged on the side facing away from the tool 12 of the head housing 2 or accessible from this side. It has a pressure member 46, which is manually displaceable in a guide 47 axially between an inwardly shifted functional position and an outwardly shifted ready position.
  • the pressure member 46 is inserted by finger pressure of the associated operating hand, wherein conical surfaces 36, 51 meet and the coupling slide 24 is displaced radially outward into its release position and the shaft 11 can be pulled out of the insertion hole 4a.
  • the coupling of the shaft 11 takes place when inserted into the insertion hole 4a automatically by displacing the coupling slide 24 against the spring force and automatic engagement in the recess 26 in the shaft 11, the segment-shaped, z. B. as a secant groove, or may be annular.
  • the handpiece 100 shown in FIGS. 1 and 2 therefore has a number of different components, which are moved during operation or themselves
  • components or components are provided which are moved out of the head region 2 during the clamping or removal of the tool 12 in order to allow a secure grip of the tool or a release of this grip.
  • moving parts of this handpiece 100 are provided with a chromium nitride (CrN) coating and / or a titanium nitride + gold coating.
  • CrN chromium nitride
  • TiN + gold coating are in particular those parts which are exposed to a higher load during operation since the surface properties of these components can be significantly improved with the aid of the chromium nitride or titanium nitride + gold coating.
  • the chromium nitride coating used according to the invention is characterized by the following properties:
  • Another positive feature of the chromium nitride coating is that the application of relatively thick layers is easily possible.
  • the application is preferably carried out by means of PVD (Physical Vapor Deposition) - technology, wherein readily layer thicknesses of up to 5 microns can be achieved.
  • PVD Physical Vapor Deposition
  • the chromium nitride coating also creates an additional reserve of wear for the coated components, since even over a longer period of use, coating of the components concerned remains ensured. In conjunction with the high hardness and low brittleness, this results in extremely high abrasion resistance for the coated parts.
  • the chromium nitride coating and the Increased corrosion resistance of the corresponding components so their operating characteristics can be significantly improved.
  • the alternative or supplementary titanium nitride + gold coating initially consists of a titanium nitride layer (TiN), which is covered by a gold layer (Au).
  • TiN titanium nitride layer
  • Au gold layer
  • the titanium nitride layer has a thickness of up to 1 ⁇ m, while the gold layer is up to 0.5 ⁇ m thick.
  • Coating takes place with the PVD magnetron sputtering technique, which enables a reliable and uniform application of the coating to the affected components or components.
  • the handpiece 100 shown in FIGS. 1 and 2 it is intended to coat at least those components which are exposed to a higher load during operation due to surface contact with other components.
  • these are in particular the shafts 3 of the drive mechanism or their coupling parts 3a and the components of the bevel gear 8.
  • the bearing parts ie the races of bearings used for supporting the shaft 3 3b and the bearing 5 could be coated for the drive sleeve 4 become.
  • Another application of the coating according to the invention are the various components of the mechanism for clamping or coupling the tool 12, ie the various components of the clutches 9 and 11. All these components are exposed during operation of the handpiece 100 a relatively heavy load, as they are in surface contact with other elements and transmit forces.
  • a straight motor handpiece is presented, which is already known from DE 44 06 855 A1 of the Applicant. This handpiece is shown in FIGS. 3 and 4.
  • the rod-shaped, straight handpiece 101 consists of a rear motor part 102 with a built therein, in particular electric drive motor 103 and a front handpiece part 104, in the front of a machining tool with its shaft 105 can be clamped.
  • the collet 106 can be opened and closed by a relative rotation between the motor part 102 and a grip sleeve 104a of the handpiece part 104.
  • an actuating mechanism 108 is integrated, which is effective between the grip sleeve 104a and the drive shaft 107 and has a gear 109, which converts the rotational movement of the grip sleeve 104a in an axial movement of a round tightening rod 110 extending from the rear coaxially through a Bearing sleeve 107a of the drive shaft 107 extends, is axially movably mounted in a bore and is screwed with its front end into an internal thread 106a of the collet 106.
  • the grip sleeve 104a is mounted rotatably and longitudinally displaceably on a sleeve-shaped inner housing 111 about the longitudinal central axis 112 of the handpiece 101.
  • the drive shaft 107 is rotatably supported by means of two roller bearings 113, 114 having an axial spacing from each other.
  • the motor part 102 can be connected by a cable 102a and possibly a connection part 102b to a power supply source and / or a control unit.
  • the coating with chromium nitride and / or titanium nitride + gold on otherwise designed handpieces and Drive principles can be used.
  • the coating of the bearing parts for the turbine as well as the elements for clamping or holding the tool with chromium nitride or titanium nitride + gold would be conceivable, since in this case, the invention sought after advantages in terms of resistance to excessive wear of the various components.
  • the inventive proposal to coat components of a handpiece with chromium nitride and / or titanium nitride + gold the properties of these components and thus the handpiece can be significantly improved overall. It is a particular advantage of the present invention is that the coating with chromium nitride or titanium nitride + gold can be carried out relatively easily and in high quality, so that the invention and the improvements sought thereby can be implemented in a simple but reliable manner ,

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)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

L'invention concerne une pièce à main (100, 101) destinée en particulier aux applications médicales et dentaires, cette pièce à main comportant un mécanisme d'entraînement pour un outil (12, 105) maintenu par la pièce à main (100, 101). Des pièces mues ou mobiles de ladite pièce à main (100, 101) sont au moins partiellement recouvertes d'un revêtement contenant du nitrure de chrome et/ou du nitrure de titane et de l'or.
EP06742967A 2005-05-30 2006-05-17 Piece a main a pieces mues ou mobiles dotees d'un revetement Withdrawn EP1887962A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06742967A EP1887962A1 (fr) 2005-05-30 2006-05-17 Piece a main a pieces mues ou mobiles dotees d'un revetement

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP05011617A EP1728483A1 (fr) 2005-05-30 2005-05-30 Pièce à main avec revêtement pour parties mobiles
EP06742967A EP1887962A1 (fr) 2005-05-30 2006-05-17 Piece a main a pieces mues ou mobiles dotees d'un revetement
PCT/EP2006/004686 WO2006128587A1 (fr) 2005-05-30 2006-05-17 Piece a main a pieces mues ou mobiles dotees d'un revetement

Publications (1)

Publication Number Publication Date
EP1887962A1 true EP1887962A1 (fr) 2008-02-20

Family

ID=34937050

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05011617A Withdrawn EP1728483A1 (fr) 2005-05-30 2005-05-30 Pièce à main avec revêtement pour parties mobiles
EP06742967A Withdrawn EP1887962A1 (fr) 2005-05-30 2006-05-17 Piece a main a pieces mues ou mobiles dotees d'un revetement

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP05011617A Withdrawn EP1728483A1 (fr) 2005-05-30 2005-05-30 Pièce à main avec revêtement pour parties mobiles

Country Status (3)

Country Link
US (1) US20080213722A1 (fr)
EP (2) EP1728483A1 (fr)
WO (1) WO2006128587A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5752999B2 (ja) * 2011-06-01 2015-07-22 株式会社ナカニシ 歯科用ハンドピース
DE102012019852A1 (de) * 2012-10-10 2014-04-24 Gebr. Brasseler Gmbh & Co. Kg Instrumentenhalterung
CN103494646A (zh) * 2013-10-14 2014-01-08 桂林市啄木鸟医疗器械有限公司 钛合金的牙科手机
DE102014202419A1 (de) * 2014-02-11 2015-08-13 Sirona Dental Systems Gmbh Spannzange zum Einspannen eines zylindrischen Werkzeugschafts
ES2623140T3 (es) * 2014-08-08 2017-07-10 W & H Dentalwerk Bürmoos GmbH Dispositivo de acoplamiento para transmitir un movimiento de impulsión de una pieza de mano, que transmite vibraciones, a una herramienta para uso clínico, particularmente odontológica
US10828129B2 (en) 2014-08-08 2020-11-10 W&H Dentalwerk Bürmoos GmbH Tool-coupling device for a vibration transferring handpiece
USD814633S1 (en) 2015-08-07 2018-04-03 W&H Dentalwerk Bürmoos GmbH Drive axle for dental or medical device

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Publication number Priority date Publication date Assignee Title
CH667361GA3 (fr) * 1986-02-04 1988-10-14
JP3208249B2 (ja) * 1993-12-28 2001-09-10 株式会社モリタ製作所 歯科用切削工具の把持装置
DE4406855A1 (de) 1994-03-02 1995-09-07 Kaltenbach & Voigt Gerades Motorhandstück, insbesondere für medizinische Zwecke, vorzugsweise für ein medizinisches oder dentales Labor
DE19629902A1 (de) 1996-07-24 1998-01-29 Kaltenbach & Voigt Winkelförmiges oder gerades Handstück mit einer lösbaren Spannvorrichtung für ein rotierendes Werkzeug, insbesondere für medizinische oder dentale Zwecke
JPH1176263A (ja) * 1997-09-03 1999-03-23 J Morita Tokyo Mfg Corp 歯科用ハンドピース
US6007390A (en) * 1998-06-30 1999-12-28 General Motors Corporation Low friction metal-ceramic composite coatings for electrical contacts
DE19916336C2 (de) * 1999-04-12 2001-03-01 Edenta Ag, Au Rotierendes Werkzeug zur spanabhebenden Bearbeitung von Werkstücken
EP1225353A4 (fr) * 2000-07-18 2006-08-09 Nsk Ltd Appareil roulant
DE10114657A1 (de) * 2001-03-26 2002-10-10 Kaltenbach & Voigt Beschichtung für Handstück
US20030219698A1 (en) 2002-02-25 2003-11-27 Heil Donald J. Dental handpiece
DE10259012A1 (de) 2002-12-16 2004-07-08 Sirona Dental Systems Gmbh Zahnärztliches Handinstrument mit zueinander bewegten Bauteilen

Non-Patent Citations (1)

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Title
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Also Published As

Publication number Publication date
US20080213722A1 (en) 2008-09-04
EP1728483A1 (fr) 2006-12-06
WO2006128587A1 (fr) 2006-12-07

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