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
  • A61C1/142—Operating tool blocking means
• • 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
  • A61C1/14—Tool-holders, i.e. operating tool holders, e.g. burr holders
  • A61C1/142—Operating tool blocking means
  • A61C1/144—Operating tool blocking means constricting the operating tool, e.g. chuck
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T279/00—Chucks or sockets
  • Y10T279/17—Socket type
  • Y10T279/17666—Radially reciprocating jaws
  • Y10T279/17692—Moving-cam actuator
  • Y10T279/17743—Reciprocating cam sleeve
  • Y10T279/17752—Ball or roller jaws
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T279/00—Chucks or sockets
  • Y10T279/17—Socket type
  • Y10T279/17761—Side detent
  • Y10T279/17811—Reciprocating sleeve

Definitions

• the present invention relates to a new removable attachment of a dental instrument in a handpiece head.
• dental instruments such as milling cutters or endodontic instruments
• an active part for attachment to handpieces, of the right handpiece type or of the type against angle.
• a standard defines the tail for instruments used at low speeds.
• the tail of the instruments is cylindrical and provided with a groove (a) for their axial retention and a flat part (b) for their rotation drive.
• the main objective of the invention is to overcome the aforementioned drawbacks.
• the invention achieves this objective by providing a device for attaching a dental instrument in a handpiece head, of the right handpiece type or of the counter-angle type, and comprising members for transmitting the rotational movement to the instrument with a rotating shaft equipped with a pinion for driving in rotation by a driving gear, the drum being mounted in a conventional manner in a bearing or lower bearing, said drum also having a central bore for receiving the tail of a dental instrument composed of a cylindrical body provided with an annular attachment groove for the axial retention of the instrument, and a drive flat parallel to the longitudinal axis of the instrument intended to immobilize it in rotation by cooperation with a flat part of the barrel, the head comprising an upper circular opening for mounting the members of said transmission, closed by a press-button whose actuation releases the instrument, characterized in that it comprises in combination:
• An erasable cleat integral in rotation with the rotating shaft, and having a positioning plane intended to coincide with the flat part of the instrument.
• the cleat can be erasable longitudinally or radially relative to the axis of the barrel.
• the invention relates to a device for attaching instruments comprising a rotating shaft intended to receive the instrument and to drive it in rotation, characterized in that it comprises, on the one hand, a device having at least one elastically retractable spur. perpendicular to the axis of the housing of the instrument until it can engage in the latching groove thus ensuring the axial retention of the instrument, and secondly an integral cleat in rotation the rotating barrel and which in combination with the rotating barrel gives the combined shape to that of the drive flattening of the tail of the instrument which has the particular feature of being erased radially or longitudinally if the flat is correctly oriented takes again the position in which it provides the rotational drive of the instrument.
• the flat part of the instrument generally comes to take the appropriate position during rotation as soon as the slightest rotational force is applied to it.
• the instrument is released by action on a snap, for example, which controls the spacing or the radial erasure of the lug.
• FIG. 1 represents a standard type dental instrument tail
• FIGS. 2, 3 and 4 are views in axial section of a handpiece head equipped with an attachment device according to a non-limiting embodiment of the invention
• FIGS. 5 to 10 are partial and three-dimensional views of the embodiment shown in FIGS. 2 to 4, and showing the introduction and attachment of an instrument that has been in any angular position;
• FIGS. 11 and 12 show an erasable cleat according to the invention,
• FIG. 13 is a partial and three-dimensional view of the same embodiment as in FIGS. 5 to 10, showing the introduction and hanging of an instrument. , which has presented itself in an angular position putting in direct coincidence its flat surface with a corresponding shape of the head,
• Figures 14 and 15 are partial top views corresponding to Figures 9 and 10.
• FIG. 2 showing a contra-angle head according to the invention in which a standard dental instrument stub such as that of FIG. 1 is maintained.
• a rotating shaft (5) equipped with a pinion (6) for its drive in rotation by a not shown drive gear.
• the shaft (5) is mounted in a conventional manner in a bearing or lower bearing (7).
• the shaft (5) is covered by a cap (8) which is integral in rotation and in translation, said cap being positioned in a bearing or upper bearing (9).
• the cap (8) is composed of a cylindrical casing (8a) mounted coaxially with the longitudinal axis (4) of the barrel, and a bridge (8b) integral with the casing, arranged diametrically on the top of the casing. cap.
• the envelope (8a) of the cap is provided with a peripheral outer stop (8c) whose function will be detailed later.
• the envelope further comprises two slots (8d) arranged parallel to the axis (4) and diametrically opposite, and extending over the entire length of the envelope.
• a function of said cap (8) is to maintain and fix against the barrel one or more, for example, two resilient hooking levers (10) each extending parallel to the axis (4) longitudinal barrel.
• the lower end of a lever rests on the upper face of the pinion (6) while the upper end is extended by a tip (12) inclined, and deviating from the axis (4), according to a angle ( ⁇ ) relative to the axis (4), so as to present internally an inclined plane (12a), whose function will be detailed later.
• Each lever also comprises a lug (11) projecting towards the axis (4), and dimensioned so as to engage in the groove (2) of the instrument.
• the slots (8d) of the cap are dimensioned so that the levers (10) can deform and engage in the slots to ensure the radial spacing of the lugs.
• a cleat (13) resting on the sprocket is trapped inside the cap and can slide inside it.
• These constraints define the shape of the cleat, visible in FIGS. 11 and 12, delimited by a lower plane (13a) bearing on the upper surface of the barrel, an upper plane (13b) being able to abut on the underside of the bridge, a outer cylindrical shell (13c) of the same concavity as the inside of the casing of the cap, and a lateral plane (13d) perpendicular to the lower plane and the upper plane.
• the cleat comprises on the top a slot (13e) or groove, arranged radially and transversely, and on its side wall a longitudinal cylindrical groove (13f) opening laterally, as well as on the top of the cleat, and extending over only a part the length of the latter, so as to serve as a housing for a compression spring (14), prisoner between the bottom of the groove (13f) on the one hand, and the underside of the bridge (8b) of the cap on the other hand.
• a compression spring 14
• the cleat further comprises a cylindrical inner bore (8g) substantially of the same radius, with operating clearances, as the body of an instrument, so as to be able to slide relatively outwardly from said instrument body.
• the engagement of the slot (13e) with the bridge (8b) of the cap ensures the rotational drive of the cleat and also allows it to slide under the action of an axial force, oriented towards the bridge (8b) and exerted by an object introduced into the central and axial bore of the rotary shaft (5), and intended to receive the instrument.
• all the elements of said attachment device is mounted in a substantially cylindrical sleeve (19) with a bottom end, a circular transverse flange ( 19a), directed towards the axis (4), see FIG. 2 and following.
• the lever or levers (10) are positioned against the shaft of the pinion, abutting against said pinion, and opposite the slots (13e) of the cap. Each lever is locked in the lower part by housing a return (10a) in the sleeve (19) so as to allow the elastic return of its upper part after separation thereof.
• the upper bearing is locked axially downwards by the peripheral stop (8c) of the cap, and upwards by an annular stop (20) engaged in the upper opening of the sleeve.
• Said annular abutment (20) is provided with at least two slots (20a), parallel to the axis (4), provided to allow the passage of attachment arms (18) integral with a snap (17). closing the opening of the head of the handpiece.
• Each attachment arm (18) is provided at its end with a hook
• the snap-button also has on the underside an annular shape (22) conical outer wall, and directed towards the cap.
• the diameter of this annular shape (22) is provided so that its conical outer wall (22a) engages on the inclined plane (12a) of each point (12) of the elastic levers (10), when the button pressure is depressed, which produces the disengagement and the spacing of the levers (10) and the disengagement of the pins (13).
• the operator having grasped the handpiece, presents the head of said handpiece above the chosen instrument and introduces it into the barrel (5) without having to worry about the position of the handpiece. flat part of the instrument.
• the release of the instrument is effected by pressing the button (17) which separates the tips (12) of the levers and radially erases the lugs (10a) Figure 13.
• the elasticity of the levers allows the automatic return pins. Note that to facilitate the reading of the figures, it has not shown a return spring of the button.
• attachment assembly in the form of a cartridge, or a sleeve in which are mounted the mechanical components of the attachment, the cartridge being mounted without screwing, and being held in place by keying effect by the support element of the drive pinion engaging in the bore perpendicular to the axis of the instrument (not shown).

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)

Applications Claiming Priority (2)

Publications (1)

Family

ID=35613929

Family Applications (1)

Country Status (12)

Families Citing this family (3)

Family Cites Families (7)

• 2005
  • 2005-06-03 FR FR0505609A patent/FR2886536B1/fr not_active Expired - Fee Related
• 2006
  • 2006-02-24 KR KR1020077029081A patent/KR20080012965A/ko not_active Application Discontinuation
  • 2006-02-24 RU RU2007144587/14A patent/RU2376953C2/ru not_active IP Right Cessation
  • 2006-02-24 BR BRPI0610732-0A patent/BRPI0610732A2/pt not_active IP Right Cessation
  • 2006-02-24 CA CA002605805A patent/CA2605805A1/fr not_active Abandoned
  • 2006-02-24 EP EP06709373A patent/EP1901673A1/fr not_active Withdrawn
  • 2006-02-24 US US11/910,904 patent/US8075311B2/en not_active Expired - Fee Related
  • 2006-02-24 WO PCT/FR2006/000418 patent/WO2006128982A1/fr active Application Filing
  • 2006-02-24 MX MX2007015003A patent/MX2007015003A/es active IP Right Grant
  • 2006-02-24 JP JP2008514137A patent/JP2008541910A/ja active Pending
  • 2006-02-24 CN CN2006800064350A patent/CN101132745B/zh not_active Expired - Fee Related
• 2008
  • 2008-06-24 HK HK08106986.5A patent/HK1116652A1/xx not_active IP Right Cessation

Non-Patent Citations (1)

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