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
  • A61C1/088—Illuminating devices or attachments

Definitions

• the present invention relates to the production of a dentistry handpiece consisting of a gripping sleeve at one end of which a tool head intended to receive a dental treatment tool contains a working drive device. with compressed air or mechanically and at the other end of which there is a circular housing in which a connecting piece constituting the end body of a supply pipe for the fluids supply of the handpiece or the end barrel of the cap of an air or electric micro-motor at the end of a flexible guide of the means for supplying the motor and the handpiece is likely to come to hang in a removable manner and so as to be able to rotate freely relative to the gripping sleeve, the connecting piece, respectively the coif ⁇ fe of the micro-motor, being unJe of through and through passage channels for feed fluids, which are cut strips to the fluid supply lines of the gripping sleeve leading to the points of use of the handpiece.
• a dentistry handpiece is known. It has the advantage of not being rigidly coupled to its supply pipe or to its flexible guide to the supply
• dynamic dental instruments have been developed and perfected, in particular turbine handpieces carrying, as an integral part, at least one light guide, for example a bundle of optical fibers, which terminates in the region of the tool head and which is intended to illuminate the dental treatment tool and, consequently, the surface of the tooth to be treated.
• the light guide alone is not enough to produce this result. It must obviously be powered by a light source, most often in the form of an incandescent lamp, for example a halogen lamp, itself generally connected by plug elements associated with a lamp holder. plugging in and to electrical conductors.
• the first difficulty lies in the supply of light to the light guide. In other words, the question arises of how and where to integrate the light source into the wider instrument.
• the second difficulty lies in the supply of electricity to the light source.
• the question arises as to how and where to integrate the plug-in socket and the electrical conductors into the wider instrument.
• the light source is never integrated into the gripping sleeve of the handpiece but rather is either in the end on the tool side of the connecting piece in a pre-viewed hole. for this purpose, either in the body of the micro-motor, or further upstream, then forming the subject of a specific device ⁇ integrated or not in the hose or in the flexible guide of the supply means.
• the present invention pursues the aim of integrating the light source into the grip sleeve of the dentistry handpiece and proposes two solutions in order to match the rotary connection between the grip sleeve and the connecting piece, respec ⁇ tively the end barrel of the cover of the micro-motor which is attached thereto with a rotating electrical contact also.
• Fig. 1 is a side view, partially in section of the dentistry handpiece.
• Fig. 2 is a sectional view along line A - B of FIG. 1.
• Fig. 3 is a sectional view of the connection piece.
• Fig. 4 is a sectional view along line C - D of FIG. 3.
• Fig. 5 is a sectional view of the end of the part
• Fig. 6 is a side view of the section of the handpiece in which the light source is integrated.
• the den ⁇ tisterie handpiece consists of a grasping sleeve 1 in which is housed a body 2.
• a tool head which encloses a drive device is either an air motor or an air turbine in the hollow rotor shaft from which respectively which can be attached a tool 4 for dental treatment.
• a circular housing 5 At the other end of the gripping sleeve 1 in the body 2 there is disposed a circular housing 5 in which a cylindrical connecting piece 6 can be detachably hooked which can rotate freely relative to the body 2, respectively to the gripping sleeve 1.
• the connecting piece 6 constitutes the end body of a supply hose * flexible not shown which is integral with it and which conducts supply fluids towards the connecting piece 6. That -this is provided with through and through through passage channels 7 for the said fluids which correspond to conduits 8 complementary to the supply fluid in the body 2 of the grip sleeve 1 when the connecting piece 6 is coupled to the grip sleeve 1.
• the conduits 8 open at the points of use of the handpiece.
• the connecting piece 6 is provided at its front end with a guide pin 9 for easy insertion into the housing 5 in the body 2 of the gripping sleeve 1. It contains the passage channels 7 which open longitudinally or radially from the front part or at the periphery of the guide pin.
• the gripping sleeve 1 contains a light guide 10, in occluding this a cord consisting of a bundle of optical fibers, which passes through it longitudinally but partially.
• the anterior end of the light guide 10 exits from the grip sleeve 1 in the region of the base of the head 3 in the form of two eyes directed on the dental treatment tool 4 and, consequently, on the surface of the tooth to be treated.
• the light guide 10 is itself gui ⁇ die in a rigid support in the gripping sleeve 1 over substantially half of the length thereof where it is interrupted so as to form a section 10a of light guide 10.
• the gripping sleeve 1 further carries, upstream of the section 10a of the light guide 10 a hatch 11, ie a longitudinal opening giving access to a circular cavity 12 in the body 2 of the gripping sleeve 1. It is in this cavity 12 that the light source takes up, in this case an incandescent lamp 13 so as to arrive end-to-end with the section 10a of the light guide 10.
• the cavity 12 is designed in such a way that it perfectly matches the shape of the incandescent lamp 13 and that it positions it in height relative to the section 10a of the light guide 10. This can be achieved by means of a hollow rail placed at the bottom of the cavity 12.
• a cradle 14 in the form of a cradle carries, on its rear end and integrally a plug-in socket 15 in which is plugged in the incandescent lamp 13 by its associated plug elements not shown.
• the base 14 forms with the bottom of the cavity 12, respectively the rail , a kind of sheath for the incandescent lamp 13 and the external face of the base 14 substantially com ⁇ ble the opening of the hatch 11.
• the plug-in socket 15 is connected to two electrical conductors 16, 17 one of which 16 is welded to the mass of the body 2 of the grip sleeve 1.
• the other electrical conductor 17 is brought into contact with a rod 18 mounted on a spring which has its seat in the body 2 of the gripping sleeve 1 from which it is however isolated by means of a ring of insulating material and which opens longitudinally into the part of the housing 5 intended to receive the guide pin 9 of the connecting piece 6. where it projects.
• the guide pin 9 and more particularly its front part comprises a ground contact in the form of a tube 19 also mounted on a spring which fits around the water inlet channel 7a which opens out longitudinally of the guide pin 9 exac ⁇ cently centered relative to the axis of rotation of the connecting piece 6.
• the tube 19 has its seat in the front part of the guide pin 9, protrudes relative to worn to it and body with the mass of the connecting piece 6 to which the electrical conductor 16a is carried by means of the screw 21.
• the front part of the guide pin 9 further carries, isolated from the tube 19, a circular contact track 22 mounted radially with respect to the axis of rotation of the connecting piece 6 and comprising as long, in its center, an opening for the passage of the tube 19, respectively of the channel 7a.
• the contact track 22 is connected to the electrical input conductor 17a.
• the electrical conductors 16a, 17a are extended in the connection piece 6 then in the supply pipe to a source of electricity not shown.
• the plug-in socket 15 is connected to two electric conductors 16, 17 which are unitary brought into contact with spring-mounted rods which have their seat in the body 2 of the gripping sleeve 1 they are however iso ⁇ Lees in insulating medium material rings and débou ⁇ Chent longitudinally but radially decentered relative to 1'autre in the part of 5 * des Tiné housing receiving the spindle guide 9 of the connecting piece where they protrude.
• the guide pin 9 and more particularly its front part comprises, isolated from each other, two circular contact tracks mounted radially with respect to each other and together with respect to the axis of rotation of the part connection 6, the internal track having, in its center, an opening for the passage of channel 7a.
• the contact tracks are connected to electrical conductors which pass through the connection piece and then extend through the supply pipe to a source of electricity.
• the base 14 integrally carrying the insertion socket 15 in which the incandescent lamp 13 is inserted can be fixed so as to be secured to body 2 of gripping sleeve. It can also be independent. In this case, it will be suspended from the body 2 of the grip sleeve 1 by the only conductors 16, -17. Finally, it can be suspended in the cavity 12 by an axis 23 transverse from its rear end, the pivots of which have their seat in the body 2 of the gripping sleeve 1, so as to be able to pivot around this shaft 23.
• a threaded sleeve 24 is screwed onto the grip sleeve 1 which carries a corresponding thread, closes the hatch 11 .
• the reduced length of the light guide 10 ensures abundant lumiè ⁇ re on the tool 4, that is to say, consequently on the surface of the tooth of the patient to be treated.
• the free rotation of the gripping sleeve 1 relative to the connecting piece 6 remains guaranteed, as is the interchangeable nature of the gripping sleeve 1 therefore of the tool relative to the connecting piece 6. It is finally possible to quickly chan ⁇ ger the filament 13-defective lamp without having to uncouple the sleeve gripping one of the connecting piece 6. for this purpose, the body of the incandescent lamp 13 will wear a groove or a recess to facilitate its handling using any tool blade or pointed.
• the invention is illustrated by a turbine handpiece. But it is also applicable to a handpiece excited by an air or electric micro-motor.
• the cap thereof has substantially the same shape as that of the connecting piece 6, namely a guide barrel at the end of a cap coating the micro-motor.
• a flexible guide of the means for supplying the motor and the handpiece is connected to the rear end of the cap. It is easy to integrate the mass contact in the form of the tube 19 mounted on a spring around the guide barrel in the front part of the cap and to provide this front part of the cap in isolation with a circular contact track mounted radially with respect to the axis of rotation of the cap coating the micro-motor.
• the front part of the cap isolated from each other, with two circular contact tracks mounted radially, one with respect to the other and together with respect to the axis of rotation of the cap covering the micro-motor.
• the circular or the contact paths are partially embedded in the front portion of the cap to allow attachment of a conventional handpiece, 'that is, - i4 -
• the electricity supply means housed in the end of the grip sleeve opposite to that carrying the tool head 3 will be identical to those already described.

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=4188588

Family Applications (1)

Country Status (3)

Citations (3)

• 1984
  • 1984-02-03 CH CH50784A patent/CH655436B/fr unknown
• 1985
  • 1985-01-16 WO PCT/CH1985/000004 patent/WO1985003424A1/fr not_active Application Discontinuation
  • 1985-02-01 IT IT8519330A patent/IT8519330A0/it unknown

Patent Citations (3)

Also Published As

Similar Documents

Legal Events