DE2215377A1 - Material processing device with an electromagnetically vibrated tool - Google Patents

Description

4690 Herne, Freiligrathstrasse 19 P.O. Box 140

Pat. Herrmann-Trentepohl Telephone: 51013 51014

Telegram address:. Bahr patents Herne Telex 08 229

Dipl.-1 ng. R. H. Bahr Dipl. - Phys. Eduard Betzier Dipl.-Ing. W. Herrmann-Trentepoh B.

PATENT LAWYERS

8000 Munich 23,

Fisenacher Strasse 17 Pat. Betzier telephone: 39 8011 39 8012 39 8013

Telegram address: Babetzpat Munich Telex 5 215360

Bank accounts:

Bayrische Vereinsbank Munich 952287 Dresdner Bank AG Herne 7-520499 Postal check account Dortmund 558 68

Ref .: MO 346o Ka / M.

please indicate in the answer

Please send a letter to:

Munich

Sven Karl Lennart Goof,

Gammel Strandvej 2 ^ 6 A,

DK-3o5o Humlebaek / Denmark

Material processing device with a

electromagnetic in
Vibrations tool

The present invention relates to a material processing device with a handle and one inside the handle arranged transducer consisting of a core and a coil for the transmission of ultrasonic vibrations on a metal working tool, in particular on a 'tooth working tool of the device.

Devices working with vibrations in the ultrasonic range " this type are used by dentists to remove plaque, tartar or the like. used mechanically. One such

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Device is, for example, in the German disclosure document 1 916 5o7.

In this device according to the prior art the current is switched on and off by means of a movable ring on the device.

In this and in other known devices for ultrasound treatment of the teeth, the dentist must in order to regulate the vibrations of the dental processing tool Operate the control button of a control box in which the various electrical components for the feed and conversion of the current are housed. This control box is usually either on the stand housed, which forms part of the dental chair and this carries the dental drills and Drilling tools, which has the disadvantage that the dentist has difficulty pressing the control button without Disturbance of the patient can reach and operate, or this control box may like on the wall of a clinic hang or be arranged on another table, which in such a case requires additional space is created in the clinic. In any case, the dentist must himself to operate this control button from its position above or above the patient, and this movement will at least be its work delay. It is often necessary to adjust the control button during treatment of a patient, as the patient has different types of dental oil. Tooth cein or the like. may have, the different Viox'ationea des Dental treatment tool. The tip of a dental treatment tool oeschreib'c in general one elliptical orbit, and if i'.before vibrations of the dental treatment tool have been mentioned, so is the

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Size or extension of the elliptical orbit meant, for the sake of simplicity, the vibration or oscillation *, generation hereinafter referred to as "amplitude".

In view of the problems outlined above, it is It goes without saying that there is a need for a further simplification of the regulation in order to avoid that the amplitude, of the dental treatment tool by means of a control button attached to said control box must be adjusted ..

According to the present invention is a material processing device of the type briefly described above. see, and in this device the improvement or characteristic is an electrically conductive device which is within the magnetic field the coil is arranged and designed to gradually increase the strength of the magnetic field in or through the core and controllably diminish ..

By reducing the strength of the electric Field through which the core is flooded, it is possible a decrease in the amplitude of the machining tip of to reach a predetermined maximum value, which corresponds to the largest amplitude, the usual for Tartar removal is required to a lower value, the lower machining requirements if the covering is easier to remove. This maximum value of the amplitude can be the optimum value correspond, which is determined by the electrical advantages of the control box in terms of the desired Frequency, which is generally of the order of

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.ίο to ρ ο kilohertz "'. In other words, the Gorät should be lived out and trained in such a way that a minimal loss of energy occurs if the strength of the magnetic field in your core is not extended, and When it is reduced, the energy loss is given off or reflected as heat. The transducer coil, which can also be viewed as a primary coil, induces a current in an electrically conductive device called her, i.e., using the same terms as a secondary coil is to be seen, and by an adjustment odex ¹ adjustment of this electrically conductive device, it is possible to adapt the resulting magnetic field passing through the core to the requirements and to improve them accordingly.

The adjustment of the electrically conductive device can be done in several ways, of which preferred types subsequently explained, can be done by hand on the device itself, whereby the above-mentioned Disadvantages of the prior art are avoided.

In a preferred embodiment of the invention, the electrically conductive device consists of one short-circuited or short-circuited coil, which preferably has an adjustable electrical conductivity having.

In this embodiment it is preferred that the electrically conductive device have a first and a second Comprises component, wherein the first and the second component are electrically connectable to each other and each of a electrically conductive material, the -first

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Component consisting of two contacts which between them form a slot extending in the longitudinal direction of the handle, the two contacts being connected to one another at least along part of their length by means of an electrically conductive connecting device which extends around the core without closing the slot touch, and that the second component is designed and arranged such that a relative movement of the two components in an electrical connection of the two _N contacts adjusts the second component so that it covers increasing lengths of this skirt in the said first component.

In a further exemplary embodiment, this second component can be an electrically conductive cylinder part of variable height, which is designed to cover increasing lengths of the mentioned slot by a relative movement with respect to the first component. When the term "cylinder part" is used, it means any part of a cylinder, that is, a body in which a cross section perpendicular to a generatrix is a circle or a segment of a circle. ^4th

The cylinder portion is preferably in contact with, appropriately arranged for sliding movement. the _; other component of the electrically conductive device > provided.

The greatest height of the cylinder part should essentially be equal to the length of the slot, making the length the electrically conductive device is brought to the lowest possible level.

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in accordance with the invention, one of the Components of the electrically conductive device attached to the handle and at least one. Part of it be rotatable, while the other component is non-rotatably attached within the other component. These Execution facilitates di. Regulation of the oeide-n components from the outside. In view of the construction of the other components of the apparatus, it is preferred that the variable in height cylinder part isυ, which is attached to the Handle is attached.

In another embodiment of the invention, the second component consists of the electrically conductive device of an elongated member having a width equal to the width of the slot, and wherein the two components are mutually displaceable in the axial direction, the two contacts in electrical Standing in contact with increasing lengths of the shiit ^ es to cover in your first component. Hieroei should do that the first component to be stationary and the elongate member to be axially displaceable in the longitudinal direction of the handle.

As mentioned above, the first component of the electrically conductive device includes two contacts which are connected to one another along at least part of their length by means of an electrically conductive connecting member which extends around the core without passing through the slot. If the connector connects the two contacts over their full length, the first component can be a slotted: ¹ cylinder.

When the strength of the magnetic field flowing through the core decreases in the meaning given above

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ivird, heat is generated in the electrically conductive device developed / and this appearance can be a disadvantage pose for the dentist.

In the first preferred embodiment According to the invention, this disadvantage is eliminated in that only two adjacent ends of the Contacts are connected to one another by means of the connecting member, in which case the connecting member consists of a slotted cylinder, and in which embodiment the second component is arranged only on the non-veroundenen portion of the contacts is. This allows some of the heat to pass through the connecting link be discharged, which can be used in a position in which it is the mode of operation of the device not disabled. In the 'most advantageous embodiment, the connecting member has a larger electrical Resistance on than the contacts, so that the greater part of the heat generated is given off to the contacts will. The contacts can, for example, be made of pure silver and the connecting link made of electrolyte nickel, Phosphor bronze or platinum are made. In order to avoid the appearance of corrosion, suitable seals should be provided to prevent the ingress of moisture.

For dental treatment devices of the type described in the present Beschrebung "a coolant usually passes through a transducer coil and surrounding the core jacket, and by the arrangement of the connecting member of the first component in an x ¹ recess of said shell it is easier to dissipate the heat by means of the cooling medium .

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The invention is explained below with the aid of several exemplary embodiments explained in more detail with reference to the drawings. In the drawings show;

1 is a perspective view of a material processing device it j

Figure 2 is a perspective exploded view of the apparatus of Fig. II constituting a first embodiment

Fig. 3 is a schematic view of an electrically conductive device of Fig. 2;

4 shows a schematic perspective view of another exemplary embodiment of an electrical conductive device;

5 shows a perspective view of a further exemplary embodiment of an electrically conductive device;

Fig. 6 also. A perspective view of a further embodiment of an electrically conductive device;

Figure 7 is an exploded perspective view similar to Figure 2 but showing the most preferred embodiment of the electrically conductive device;

8 is a perspective schematic view of FIG electrically conductive device of the device of Fig. 7;

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9 is a schematic perspective view of a further exemplary embodiment of the electrically conductive "Contraption. -..-".

In the following, drawings will be discussed in detail, in which the same reference numerals are the same or corresponding Designate components in different views. ■ In Figures 1, 2 and j? denotes the reference number Io is an UltrasGhalid device or ultrasonic tooth processing device Io as a whole. That. Device includes a tip 12 mounted in a tip device (not shown) is attached, which by means of a high-frequency current through a line 14 cause high-frequency vibrations can. The way in which the current is converted into tip vibrations is on the present The field is generally known, in this context reference is made to the German patent application mentioned above will. The conversion of electricity into mechanical vibrations or oscillations does not form part of the present Invention, and a further description at this point is deemed unnecessary for this reason. For removing or. Washing or rinsing 'the Dental plaque to be removed from the teeth ^ and for cooling the device is a coolant supply line 16 is provided, which can also be fed through the line 14. The way in which- water flows from the line 14 to the supply line 16, forms does not form part of the present invention, but can be made as described in the description of the above German Offenlegungsschrift is explained. The summit 12 and the tube or line 16 are arranged in a connection piece 18 to which the transducer core is also attached 2o (Fig. 2) is attached. The part of the device that has just been described is detachable in a holding

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device 22 is arranged, and the whole assembly is inserted into the remainder of the device, which includes a handle 24 of substantially cylindrical shape, so that this can be easily grasped. The reference number 26 denotes a ring 26 which can be moved in the axial direction and which, by means of a flat rod 28, can control a microswitch (not shown) in the rear end of the device. The microswitch will normally be off in the Pig. I position of the ring 26, a and when the ring moves backwards until it reaches a circular edge ~ $ o , the microswitch is switched on. Current then flows through a coil 52, as a result of which the core 2o executes longitudinal oscillations or longitudinal vibrations at a frequency corresponding to the current frequency. The electrically conductive device according to the invention has the reference numeral 40 in FIG. 5 and has a first component 42 and a second component 44. The first component 42 is designed as a slotted cylinder, a slot being formed between parallel sides. The edge portions of the component 42 facing the slot are bent downward and held in grooves of a tubular member 46 which is arranged on the outside of the coil ~ j> 2 and also an extended slot for receiving and guiding the rod 28 for Has controlling the microswitch. The second component 44 comprises, as can be seen from FIG. 2, a cylinder part with a straight base 48. The cylinder part has a variable height, the greatest height being along side 50 and the smallest height being along the other side 52. The length of the side 52 can decrease to close to zero due to the fact that the cylinder part has a sharp point or corner. Opposite the base 48, an edge 54 runs parallel to the base at the end of the side 5o,

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and the edge 54 is about the same length as that Width of the slot in the component 42. Figure J5 shows like the components 42 'and 44 are arranged relative to one another are net. In the Pig ·. "5 locations shown are approximate 5/6 of the length of the slot covered by component 44. By rotating the component 44 in the opposite direction clockwise, the portion of the slot covered by member 44 increases, and if the side 5o is in alignment with the edge 62 of the component 42, the slot will be almost completely closed or covered. When the component 44 is rotated in In a clockwise direction, the "portion of the slot covered by member 44 is decreased until the side 52 next to the slot edge 62 is the position in which the first component 42 has no significant influence the magnetic field flowing through the core has »In the embodiment shown in FIG the two components 42 and 44 slide in electrical contact with one another.

When the component 42 is attached to the tubular member 46, the second component 44 is intended to be attached to a rotatable portion 56 of the handle. The two components 42 and 44 can be fastened in a conventional manner, for example by gluing. A stop 58 can be provided on the inside of the rotatable part 56 of the handle, as can best be seen in FIG. The stopper 58 acts as an abutment by rotation of the rod 28. In conjunction with the Ansehlag 28 or in another suitable manner to a "display device may be provided 60th The display device cooperates with a scale, in Figures 1, 2, ~ _3? 4 ... is illustrated, the lowest number being the smallest amplitude of the vibrating

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Tool 12 corresponds. By rotating the rotatable portion 56 of the handle clockwise, i.e. in the direction of higher numbers, the influence on the strength of the magnetic field through the nucleus is reduced, and there are increasing amplitudes for the tool 12. The components 42 and 44 are at least on the surfaces electrically conductive, which slide against each other, and they preferably consist of an electrically conductive Material such as phosphor bronze. No particular thickness is required and components 42 and 44 can Be foils, films or sheets.

Fig. 4 is a schematically illustrated segment corresponding to that of Fig. 1, but with a different embodiment for the electrically conductive device generally designated 70. The device 7 o comprises a longitudinally slotted cylinder J2 and an elongated member 74. The cylinder 72 is intended to be attached to a tubular member in a manner similar to that of the component 42 to the tubular member 46 of FIG Way of a foil, for example made of phosphor bronze. The elongate member 74 includes an elongate portion 76 of a width equal to the width of the slot in the cylinder 72, and the elongate portion J6 is attached to a guide member 78 which can slide on the outer surface of the handle in a device similar to that which is shown in FIG. By means of a scale ranging from 1 to 5, for example, the elongate member 74 is adjusted to a desired reduction in the strength of the magnetic field passing through the core 20. In the position shown in Fig. 4, there is only a slight change within the magnetic field flowing through the core,

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but by moving the elongated -.link- 74 to right -referring to. the drawing - becomes the whole Conductivity of the electrically conductive device 7o raised, and when the elongated limb 7 ^ a position reached in which the elongated part "76 the slot 4-9 completely covered, "results in the greatest reduction in the strength of the magnetic field"

. In the embodiment shown in Fig. I), the electrically conductive device consists of a ^: ring 80, which is axially displaceable in two directions on a portion 82 of the handle 24 of reduced diameter. By moving the ring member 80. to the right of the position shown in the drawings, ie in the direction of increasing scale numbers, as can be seen ^{on the handle 82:} the MnZIuB falls on the magnetic field through the core, and the tip of the machining tool will therefore vibrate with increasing amplitude.

In the embodiment shown in Fig. 6, that a segment or », a section similar to those of the Figures 3 and 4 comprises the electrically conductive Device 90 makes sliding contact on spool 32, Die corresponding surface of the coil 32 has no elec ^ - Trisehe insulation or insulating layer on, ■ and through Shifting the sliding contact in the axial direction will short-circuit two or more turns of the coil, and the effect will be a change in this case too the strength; of the magnetic flowing through the core 2o; Be field.

In Figures 7 and 8, the most preferred is the one Embodiment of the device according to the invention shown

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represents. The first component 42 'consists of two contacts 4j, 45 and a connector 47. Between the contacts 43, 45 is an axially extending one elongated slot 49 is formed. Contacts 43, 45 are shown here as two similar plates of generally rectangular shape, but they can be any Assume the desired shape, which does not necessarily have to be the same for the two contacts, and im With regard to their mutual situation, there is the only one Requirement that they form a slit. Along part of the length of the contacts are these with each other connected by means of the connecting member 47, which is in the The illustrated embodiment is formed by a slotted cylinder which is fastened in a circular or arcuate recess in the tubular member 46 is. A coolant such as water is intended to flow within the tubular connecting member 46, for example in the German Offenlegungsschrift mentioned above mentioned kind. The contacts 4 ^, 45 and the connecting member 47 may be integrally connected to each other and made of a material such as phosphor bronze, but they form as in the drawings is proposed, preferably three items, wherein the connecting member made of a material with a greater electrical resistance than the contacts target. The second component 44 'of the device 4o' is a cylinder part similar to that shown at 4o in FIGS. By rotating the component 44 'counterclockwise becomes an increasing part of the slot 49 covered by the component 44 'which in electrical contact with contacts 4 ^ and 45 slides. When side 50 is flush with edge 62 ' of component 42 ', the slot is almost complete covered. By rotating component 44 'clockwise, the portion of the slot that passes through the

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away

Component 44 'is covered, reduced until the side 52 is next to the edge 62 ^{f of} the slot. It should be noted that the device as shown in FIGS. 7 and 8 is similar to the device shown in FIGS. 2 and 3 as far as the adaptation or change of the magnetic field of the core 20 is concerned.

When the magnetic field is decreased, it becomes heat developed in de'r electrically conductive device, and in the embodiment shown in äenrln FIGS it is clear that the heat is just at the point where the dentist naturally grasps the device. That can be a hindrance, and in that in the Figures 7 and 8 is illustrated embodiment it is possible for the heat to pass through the link 47 to discharge the coolant flowing within the tubular member 46. "

In the embodiment shown in FIG. 9, the electrically conductive device 7 ° 'comprises an elongate member 74' which is formed similarly to the elongate member 74 shown in FIG. 4, and also a part 72 'which is similar to the component 42 ¹ which would be explained with reference to FIGS. The device according to FIG. 9 acts in the same way as the device from FIG. 4 with regard to the change in the magnetic field of the core 20, and reference is therefore made to the description given in connection with FIG. In addition, the device provides the same advantages as the embodiment of Figures 7 and 8 in terms of removing the heat generated when the magnetic field of the core 20 is changed.

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Although the invention has been described in connection with a few preferred embodiments, it will be readily understood that many changes and improvements or adaptations are possible within the spirit of the invention. For example, the electrically conductive device can be suitably arranged between the core 2o and the coil ^ 2, and the electrical conductivity of the electrically conductive device can be changed in several ways, for example by replacing the elongate member of Figures k and 9 with a resilient one Link which, by pressing down, covers changing lengths of the slot 4-9.

Finally, it should be pointed out that FIGS. 3 to 6, 8 and 9 are only schematic views of FIG Components of a device with an electromagnetically vibrated tool is that of can be of any other type and should not be limited to dental machining tools.

Claims;

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Claims (1)

a te η ta η s ρ r ü cn e 1 .J material processing device with; a handle and _s one arranged within the handle: and off. a core and a coil, which is designed to transmit high-frequency vibrations to a material processing tool, in particular a tooth processing tool, arranged in the device, characterized in that an electrically conductive device (4o, 7o, 8o> 9o,. 4ο ¹ , - To ') arranged within the magnetic field of the coil and for a gradual and controllable reduction of the strength of the magnetic field of the core (2ο). is trained. 2. Device according to claim 1, characterized in that that the electrically conductive device is a short-circuited or short-circuited coil (4o, -70, 80, 4o ', 7o') is. ^. Apparatus according to claim 2, characterized geke η η ^-: ζ η et verifiable that the conductivity of the shorted coil on and is adjustable. . . . ' - ■ '■.'".. · 4. Device according to one or more of claims 1. to j5, thereby g e k e η η ζ e i c h η e t that the electrically conductive device a first component and a second component, wherein the first and second components are electrically connectable to one another, and each consists of electrically conductive material, the first ■ - 17 -. ^: ■ "- .. '.. 209844/0750 Component (42, 72, 42 ', 72') two contact members 42, 72, 42, 45) includes, the between "one in the longitudinal direction of the handle extending slot 49, the two contact members together at least along part of their length by means of an electrically conductive Connecting link (42, 72, 47) connected to one another which extends around the core (2o) without touching or extending through the slot (49), and that the second component (44, 44 ', 78, 76) in the manner is arranged and designed that a relative movement of the two components with electrical connection of the two contact members, the second component is adjusted or arranged in such a way that it increases the length of the slot in covered by the first component. 5. Apparatus according to claim 4, characterized in that the second component consists of an electrical conductive cylinder part (44, 44 *) of varying heights, the cylinder part is formed; for cover increasing lengths of said slot due to a relative movement with respect to the first component. 6. Apparatus according to claim 5 * characterized in that the greatest height of said cylinder part is substantially equal to the length of said slot (49). • 7 · Device according to one or more of the preceding claims 4 to 6, characterized in that that one of the components is attached to the handle (74) and rotatable with at least one part (5o) thereof, - 18 - 209844/0750 while the other component is torsion-proof within the ge called a component is attached. 8. Apparatus according to claim 7 * characterized in that the component attached to the handle is attached, the second component is. 9. Apparatus according to claim 4, characterized geke ηή ~ ~ ~ characterized in that the second component is an elongate member (74, 74 ') comprises of a width corresponding to that of said slot (49), and that the two components in the axial Direction are mutually displaceable with electrical connection of the two contacts in order to cover increasing lengths of said slot in the first component. . Io. Apparatus according to Claim 9 > characterized in that the first component is stationary and that the elongate member (74, 74 ') is axial in the longitudinal direction of the handle (24). is movable. 11. Device according to one or more of the present claims 4 to lo, characterized in that g e k e η η ζ e ic h η e t, that the first component comprises a slotted cylinder (42, 72), said contacts being integral with the Link are formed (Fig. 2 and 3). 12. Device according to one or more of the preceding Claims 4 to lo, characterized in that the connecting member (47) of the first component is made - 19 209844/0750. a slotted cylinder which connects only two adjacent ends of the contacts (43, 45), whereby said second component is only arranged on the non-connected part of the contacts (Figs. 7, 8 and 9). 13. Apparatus according to claim 12, characterized in that the connected ends of the contacts (43, 45 ') are those used by the material processing tool (12) are furthest away. 14. Apparatus according to claim I3, characterized in that the connecting member (47) 'one has greater electrical resistance than the contacts (43, 45). 15. Device according to one or more of the preceding claims 1 to 14, characterized in that the electrically conductive device (4o, 7o, 80, 90, 4o ^f , 70 ¹ ) is located on that side of the converter coil which is opposite the side on which the converter core (2o) is arranged. 16. Apparatus according to one or more of the preceding claims 1 to I5, and wherein the transformer coil and the Core are enclosed in a jacket through which a coolant can pass, characterized in that the connecting member of the first Component is arranged in a recess of this jacket. - 2o - 209844/0750 221S377 17, Qer'dt according to claim 1 or 2, characterized. Ge. E k-η η ζ calibration η e t _t that the electrically conducting. ¥ prrichtung comprises a ring (8o) made of electrically conductive material, which extends in the longitudinal direction of the handle (24) is displaceable (Fig. 5) t 18. Apparatus according to claim \, characterized geke η η -η ζ e i c h η. e t that the electrically conductive device (9o) in contact with the converter coil (32) in the manner it says that two or more turns of it each rait ^ connected to each other (Fig. 6), - 21 - 209844/0750