Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C3/00—Dental tools or instruments
  • A61C3/02—Tooth drilling or cutting instruments; Instruments acting like a sandblast machine
  • A61C3/03—Instruments operated by vibration
• • 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
  • A61C1/02—Dental 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
  • A61C1/07—Dental 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 vibratory drive, e.g. ultrasonic
• • 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
  • A61C1/148—Non-rotating tool holders, e.g. vibrating, oscillating, nutating
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
  • A61C17/16—Power-driven cleaning or polishing devices
  • A61C17/20—Power-driven cleaning or polishing devices using ultrasonics

Definitions

• the present invention relates to the field of vibratory instruments, in particular for dental handpieces.
• dental handpiece equipped with a vibratory instrument including scaling, surfacing or the size of a tooth.
• the vibrations transmitted to the vibratory instrument are generally of the ultrasonic or sound type.
• a vibratory instrument comprising a tool, a tool holder and additional releasable means for vibratory coupling of the tool to the tool holder for transmitting vibration of the tool holder to the tool.
• the vibratory coupling means usually comprise complementary vibratory coupling surfaces, generally conical or cylindro-conical, formed respectively on the tool and the tool holder. These coupling means are activatable by relative movement of the tool and the tool holder along a coupling stroke which brings into contact the complementary vibratory coupling surfaces.
• These coupling means are activatable by relative movement of the tool and the tool holder along a coupling stroke which brings into contact the complementary vibratory coupling surfaces.
• the complementary vibratory coupling surfaces tend to separate, so that the tool does not vibrate.
• the vibratory instrument described in FR 2 957 243 comprises complementary releasable means for coupling the tool to the tool holder allowing, when the tool is coupled to the tool holder, the coupling-decoupling stroke vibratory.
• These coupling means comprise two coupling members, respectively male and female, attachaable to each other by relative movement along a coupling-detachment race comprising an axial component.
• the coupling members described in FR 2 957 243 are of the snap type. The latching is achieved by relative axial displacement of the two coupling members, thus traversing an axial coupling stroke.
• the female coupling member is carried by the tool holder and the male coupling member, elastically deformable, is carried by the tool. More particularly, the organ male coupling has a general shape of revolution and is split axially so as to locally allow its radial deformation when the coupling-uncoupling stroke is performed.
• the male coupling member is provided with a collar. Its radial elastic deformation of the coupling member allowing either to fit the collar in a complementary clearance formed in the female coupling member, or to separate the neck release.
• the coupling means described in FR 2 957 243 are relatively reliable. However, in a vibratory instrument as used by a dentist, the tool holder and the tool are relatively thin so that the split male coupling member is, under certain circumstances of use, relatively fragile.
• the object of the invention is to propose means for coupling the tool to the toolholder that are more robust than those proposed by FR 2 957 243, while retaining simple coupling means.
• the subject of the invention is a vibratory instrument comprising:
• this race also comprising a component in a plane substantially transverse to the axial component, referred to as the transverse component, the axial and transverse components of the coupling-uncoupling race being defined by complementary forms of interlocking formed on the two coupling members.
• the male and female coupling members proposed by the invention being dimensionally stable, during the coupling-uncoupling race, they are relatively more robust than those proposed in the state of the art.
• the race allowing the coupling or uncoupling of the male and female is easily defined by the complementary forms of interlocking formed on the two coupling members.
• the invention avoids adding additional elements to the usual coupling means.
• the invention makes it possible to simply impose, thanks to appropriate forms provided on coupling members that already exist, a coupling-uncoupling race sufficiently complex not to be traversed untimely, without voluntary action of the user. This avoids any inadvertent separation of the additional coupling means.
• the two male and female coupling members are carried respectively by the tool and the tool holder;
• the male coupling member is carried by the tool, the female coupling member being movable relative to the tool and the tool holder, according to the transverse component of the coupling-uncoupling stroke;
• the female coupling member comprising a recess defined by a first axial retaining stop for cooperating with clearance with a second axial retaining stop provided on the male coupling member to define an end of the coupling stroke- vibratory decoupling corresponding to a deactivation position of the vibratory coupling means;
• the complementary forms of interlocking of the two coupling members are complementary threads, the coupling-uncoupling race being a screwing movement of the two coupling members simultaneously combining the axial and transverse components of the coupling stroke- uncoupling;
• the complementary forms of engagement of the two coupling members comprise at least one tongue intended to cooperate with a complementary groove to define the axial component of the coupling-uncoupling race, the recess forming a clearance allowing the transverse component of the coupling-uncoupling stroke;
• the complementary vibratory coupling means comprise complementary vibratory coupling surfaces, preferably complementary conical or cylindro-conical surfaces, formed respectively on the tool and the tool holder;
• the tool holder has a generally elongated shape in an elongate direction, optionally bent or curved, the axial component of the coupling-uncoupling race being substantially parallel to the elongate direction of the tool holder;
• the complementary forms of engagement of the coupling members are, when the tool is coupled to the tool holder, disengaged between them and interposed axially between the complementary vibratory coupling surfaces and two complementary centering surfaces arranged respectively on the organs. coupling male and female to limit the radial movements of these two coupling members together;
• the tool holder has a generally elongate shape in a longitudinal direction, optionally bent or curved, the axial component of the coupling-uncoupling path being substantially transverse to the elongate direction of the tool holder;
• the tool holder has a generally elongated elbowed or curved shape, the tool being provided with a working end extending parallel to a plane substantially parallel to the bent or curved shape and outwardly of this bent shape or curved;
• the tool passes through an envelope covering the tool holder, the female coupling member being mounted on the envelope so as to be movable relative to the tool and to the tool holder, depending on the transverse component of the coupling-uncoupling stroke;
• the complementary forms of engagement of the coupling members are, when the tool is coupled to the tool holder, nested between them, two complementary centering surfaces, respectively formed on the male coupling member and on the door tool, being interposed axially between the complementary vibratory coupling surfaces and the female coupling member, these centering surfaces being intended to limit the radial movements of the two coupling members together.
• the invention also relates to a handpiece provided with a vibratory instrument, characterized in that the vibratory instrument is as defined above.
• FIG. 1 is a schematic view with axial localized sections of a handpiece according to the invention, the handpiece comprising a vibratory instrument according to a first embodiment of the invention;
• FIGS. 3 and 4 are views similar to Figure 2 showing respectively first and second embodiments of the coupling means of the vibratory instrument carried by the handpiece shown in Figure 1;
• FIG. 5 is a view similar to that of FIG. 1, the handpiece comprising in this case a vibratory instrument according to a second embodiment of the invention
• FIG. 6 is an axial sectional view of the circled portion VI of Figure 5 showing the coupling means of the vibratory instrument carried by the handpiece shown in Figure 5;
• FIG. 7 is a view along the arrow VII of Figure 6, with axial localized sections.
• FIG. 1 An apparatus, usually called handpiece, designated by the general reference 10. This apparatus is intended to be used by a dentist.
• the handpiece 10 is provided with a vibratory instrument 12 according to a first embodiment of the invention.
• This vibratory instrument 12 may in particular allow the descaling, surfacing or the size of a tooth.
• the handpiece 10 comprises a body 14 of general shape adapted to grip the body 14 by the hand of a user.
• a proximal or distal element will be described depending on whether this element is near (proximal) or distant (distal) from the user's hand.
• the body 14 comprises a proximal end 14P provided with conventional means 16 for connecting a cord (not shown) supplying fluids (water, air) and running the handpiece 10.
• the body 14 also comprises a distal end 14D extended by the vibratory instrument 12.
• the body 14 also comprises a casing 18 in which are housed conventional means comprising means 20 for generating sonic or ultrasonic vibrations and a vibration conduction member 22 between the vibration generating means and the vibratory instrument 12.
• the vibratory instrument 12 comprises a tool 24 and a tool holder 26.
• the tool 24 is provided with a distal working end 24D intended in particular to come into contact with a tooth of a patient.
• the tool holder 26 is provided with a proximal end 26P connected, in a manner known per se, to a distal end 22D of the vibration conduction member 22, by example by screwing (as shown), welding, gluing, etc. Alternatively, the tool holder 26 may extend the vibration conduction member 22 by being integral with the latter.
• the tool holder 26 has a generally elongated shape in a elongate direction bent.
• the proximal end 24P of the tool 24 is coupled to the distal end 26D of the tool holder 26 by means of additional releasable means 28 for coupling the tool 24 to the tool holder 26.
• additional releasable means 28 for coupling the tool 24 to the tool holder 26.
• Vibratory instrument 12 is also provided with additional releasable means 30 for vibratory coupling of tool 24 to toolholder 26, shown in greater detail in FIG. 2.
• the complementary vibratory coupling means 30 comprise two complementary surfaces 32, 34, preferably conical as illustrated in this FIG. 2. These conical surfaces 32, 34 diverge in the proximal to distal direction.
• a first vibratory coupling surface 32 is a male conical surface formed on the proximal end 24P of the tool 24.
• the second vibratory coupling surface 34 is a female conical surface formed on the distal end 26D of the tool holder 26.
• the complementary vibratory coupling surfaces could have other shapes, for example cylindro-conical shapes.
• This coupling-decoupling path generally comprises at least one of the following two components:
• the coupling means 28 allow, when the tool 24 is coupled to the tool holder 26, the vibratory coupling-decoupling stroke described above while maintaining the tool 24 and the tool holder 26 interconnected.
• the coupling means 28 comprise two coupling members, respectively male 36 and female 38, hitchable together or separable from each other by relative movement along a coupling-uncoupling stroke.
• the two male coupling members 36 and female 38 are carried respectively by the tool 24 and the tool holder 26.
• each coupling member 36, 38 has a general shape of revolution around the elongate direction X of the distal end 26D of the tool holder 26 to allow the free rotation of the tool 24 around this direction X relative to the tool holder 26.
• the coupling-uncoupling race is defined by complementary forms of interlocking formed on the two coupling members 36, 38. Note that these two coupling members 36, 38 do not deform during the race. coupling-uncoupling.
• the coupling-uncoupling stroke is a screwing movement of the two coupling members 36, 38 simultaneously combining the axial and transverse components of the coupling element.
• coupling-uncoupling stroke is a translation substantially parallel to the elongate direction X of the distal end 26D of the tool holder 26 and the transverse component is a rotation in a plane substantially transverse to this elongate direction X.
• the female coupling member 38 also comprises a recess 40.
• the diameter of this recess 40 is much greater than that of the thread 36F of the male coupling member 36.
• thread 38F also called tapping 38F, formed in the female coupling member 38, is interposed axially between the vibratory coupling surface 34 of this female coupling member 38 and the chambering 40.
• the male coupling member 36 comprises a barrel 42 of revolution of much smaller diameter than that of the tapping 38F of the female coupling member 38.
• the thread 36F of the male coupling member 36 is connected to the surface vibratory coupling 32 of the tool 24 via the barrel 42.
• FIG. 2 shows the complementary interlocking shapes 36F, 38F, namely the threads 36F, 38F, in a configuration in which, the tool 24 being coupled to the tool holder 26, these forms 36F, 38F are dislocated between them.
• the threads 36F, 38F of the coupling members 36, 38 are interposed axially between the complementary vibratory coupling surfaces 32, 34 and two complementary centering surfaces 44, 46 formed on the coupling members. male 36 and female 38. These two centering surfaces 44, 46 are of revolution and intended to cooperate with a radial clearance J2 to limit the radial movements of the coupling members 36, 38 between them when the tool 24 is coupled to the door tool 26.
• the two centering surfaces 44, 46 are respectively formed on:
• the two centering surfaces 44, 46 could be removed.
• the smallest diameter of the female vibratory coupling surface 34 of the tool holder 26 is greater than the diameter of the thread 36F of the male coupling member 36. It will also be noted that the diameter of the centering surface 44 of the tool 24 is smaller than the diameter of the thread 36F of the male coupling member 36.
• the male coupling member 36 is introduced into the female coupling member 38 by axially passing the centering surface 44 of the tool 24 and the 36F thread of the male coupling member 36 through the vibratory coupling surface 34 of the tool holder 26.
• the recess 40 is delimited by a surface forming a first abutment 48 for axially retaining intended to cooperate with an axial clearance with a second abutment 50 of axial retention formed on the male coupling member 36, for example to a distal end of the thread 36F.
• the cooperation of the axial retaining abutments 48, 50 defines one end of the vibratory coupling-decoupling path corresponding to a deactivation position of the vibratory coupling means 30.
• the dimensions of the recess 40 are adapted to allow the axial and radial displacements of the thread 36F in this recess 40 resulting from the vibratory coupling-decoupling path between the tool 24 and the tool holder 26.
• the complementary interlocking shapes of the two coupling members 36, 38 are threads 36F, 38F imposing a coupling-uncoupling stroke by screwing. This screwing is a sufficiently complex race not to be traversed untimely, without voluntary action of the user of the handpiece 10.
• the handpiece is provided with conventional means for circulating at least one fluid (water and / or air) intended for example for cooling the tool and / or for generating a jet of fluid towards a zone treated by the user.
• These fluid circulation means comprise, in the example shown in FIG. 2, a channel 52 formed in the tool holder 26 and grooves 54 formed in at least one of the complementary vibratory coupling surfaces, for example the surface 32 of the tool 24, as shown in Figure 2.
• the complementary interlocking shapes 36F, 38F of the two coupling members 36, 38 are disengaged between them and thus allow the passage of fluid from the channel 52 to the grooves 54 in FIG. passing through the bore 47, the recess 40 and the tapping 38F.
• FIG. 3 shows a first variant embodiment of the coupling means 28.
• the complementary forms of interlocking of the two coupling members 36, 38 are of the bayonet type and comprise an axial interlocking tongue 56, carried for example by the shaft 42 of the male coupling member 36 intended to cooperate with a complementary axial interlocking groove 58, arranged for example in the female coupling member 38.
• the two complementary centering surfaces 44, 46 are interposed axially between the complementary vibratory coupling surfaces 32 , 34 and the recess 40.
• the centering surface 44 defines the shaft 42 and the axial interlocking groove 58 is formed in the centering surface 46.
• the tongue 56 defines the axial component of the coupling-uncoupling stroke. Furthermore, the recess 40 forms a clearance allowing the transverse component of the coupling stroke. Indeed, this transverse component is a rotation in a plane substantially transverse to the elongate direction X.
• the uncoupling of the tool 24 relative to the tool holder 26 is, mutatis mutandis, performing the reverse stroke to that described above.
• the bayonet type race is a race complex enough not to be traveled unexpectedly, without voluntary action of the user of the handpiece 10.
• the dimensions of the recess 40 are adapted to allow the axial and radial movements of the tongue 56 in this recess 40 resulting from the vibratory coupling-decoupling path between the tool 24 and the tool holder 26. This avoids any undesirable radial contact of the tongue 56 against the surface delimiting the recess 40.
• the second stop 50 of axial retention carried by the male coupling member 36 is formed by a distal end of the tongue 56.
• the first abutment 48 of axial retention delimits the recess 40.
• FIG. 4 shows a second variant embodiment of the coupling means 28.
• the complementary forms of engagement of the two coupling members 36, 38 are of the bayonet type.
• the complementary interlocking shapes comprise several axial interlocking tabs 56 intended to cooperate with as many complementary axial engagement grooves 58.
• the number of interlocking tabs 56 is for example between 2 and 4 .
• grooves 60 for fluid circulation are formed in at least one of the complementary centering surfaces, for example the surface 44 of the male coupling member 36, as shown on FIG. Figure 2.
• FIGS. 5 to 7 show a handpiece 10 comprising a vibratory instrument 12 according to a second embodiment of the invention.
• the tool holder 26 extends the vibration conduction member 22.
• the tool holder 26 may be connected to the vibration conduction member 22 by screwing, welding, gluing, etc.
• the tool holder 26 has a generally elongated shape in a curved X elongate direction.
• the axial component of the coupling-uncoupling stroke of the tool 24 with the tool holder 26 is, in this case, substantially transverse to the elongate direction X of this tool holder 26.
• the distal working end 24D of the tool 24 extends, on the one hand, parallel to a plane substantially parallel to the generally elongated curved shape of the tool holder 26 and, on the other hand, outwardly of this curved form.
• This arrangement of the distal working end 24D of the tool 24 effectively illuminates a user-treated area from a conventional light source placed for example at the point L of the tool holder 26 indicated on the figure 5.
• the vibratory instrument according to the second embodiment of the invention is usually referred to as a "counter angle” type.
• This "against angle” could also be obtained with a tool holder 26 having a generally elongate shape in a elongate direction X bent.
• the envelope 18 covers the tool holder 26.
• the tool 24 passes through the casing 18 so that the male coupling member 36 extends substantially transversely to the elongate direction X of the distal end of the tool holder 24.
• the shaft 42 of the male coupling member 36 has a connecting end with the vibratory coupling surface 32 and a free end protruding outside the casing 18 when the tool 24 is coupled to the carrier. tool 26.
• the barrel 42 is provided with an annular groove 62 separating the ends of the barrel 42 to give the free end of the barrel 42 a head retaining function. Therefore will be named in the suite "retaining head 64" the free end of the shaft 42.
• the centering surface 44 defines the barrel 42 and the complementary centering surface 46 of the surface 44 is formed on the proximal end. 26D of the tool holder 26.
• the female coupling member is formed by a slider 38 mounted to move in translation on the envelope 18.
• the slide 38 could be mounted mobile in translation on the tool holder 26.
• the slider 38 includes a maneuvering end 38M and a coupling end 38A.
• the hitch end 38A comprises a slot 66 provided with a passing end 66P, allowing passage through this end 66P of the retaining head 64, and a retaining end 66R intended to fit into the throat 62.
• the groove 62 and the light 66 thus form the complementary interlocking shapes of the two coupling members 36, 38.
• this slider 38 comprises an oblong hole 68 intended to cooperate with a guiding and limiting pin 70 integral with the envelope 18.
• a channel 52 is formed in the tool holder 26 and grooves 54 are formed in at least one of the complementary vibratory coupling surfaces, for example the surface 32 of the tool 24, as shown in Figure 6.
• the slider 38 is placed so as to align the passing end 66P of the slot 66 with the vibratory coupling 34 and centering surfaces 46 formed in the door tool 26.
• the slider 38 is moved along a second translation perpendicular to the axial component of the coupling-uncoupling stroke in order to fit the groove 62 of the male coupling member 36 into the retaining end 66R of the light 66 of FIG. this slide 38.
• This second translation corresponds to the transverse component of the coupling-uncoupling stroke.
• the slide 38 forming the female coupling member is mounted on the casing 18 so as to be movable with respect to the tool 24 and the tool holder 26, according to the transverse component of the coupling stroke. uncoupling.
• the complementary interlocking shapes of the coupling members 36, 38 namely the groove 62 and the retaining end 66R of the light 66, are, when the tool 24 is coupled to the tool holder 26, nested between them.
• the male coupling member 36 has a general shape of revolution, the end of retaining 66R of the light 66 allowing the free rotation of the tool 24 around its axis of revolution relative to the tool holder 26.
• the complementary centering surfaces 44, 46 are interposed axially between the complementary vibratory coupling surfaces 32, 34 and the slide 38 forming the female coupling member. . It will be noted that these complementary centering surfaces 44, 46 are optional.
• the two coupling members 36, 38 do not deform during the coupling-uncoupling stroke.
• the axial and radial dimensions of the groove 62 and the retaining end 66R of the slot 66 are adapted to allow the axial and radial deflections of the retaining head 64 in the groove 62 resulting from the coupling-decoupling vibration stroke. between the tool 24 and the tool holder 26.
• the guiding pin and stroke limiting 70 allows to correctly position the retaining end 66R of the light 66 relative to the groove 62 to avoid undesirable contact between the male coupling member 36 and the slider 38 forming the female coupling member.

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• Health & Medical Sciences (AREA)
• Dentistry (AREA)
• Epidemiology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Oral & Maxillofacial Surgery (AREA)
• Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
• Percussive Tools And Related Accessories (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=51862421

Family Applications (1)

Country Status (6)

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Family Cites Families (13)

• 2014
  • 2014-07-23 FR FR1457091A patent/FR3024028B1/fr active Active
• 2015
  • 2015-07-21 JP JP2016576006A patent/JP2017524436A/ja active Pending
  • 2015-07-21 US US15/327,394 patent/US20170151036A1/en not_active Abandoned
  • 2015-07-21 WO PCT/FR2015/052008 patent/WO2016012714A1/fr active Application Filing
  • 2015-07-21 EP EP15751053.8A patent/EP3171812A1/fr not_active Withdrawn
  • 2015-07-22 TW TW104123696A patent/TW201611787A/zh unknown

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