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EP0816025A2 - Electrically heated scissors - Google Patents

Electrically heated scissors Download PDF

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Publication number
EP0816025A2
EP0816025A2 EP97109486A EP97109486A EP0816025A2 EP 0816025 A2 EP0816025 A2 EP 0816025A2 EP 97109486 A EP97109486 A EP 97109486A EP 97109486 A EP97109486 A EP 97109486A EP 0816025 A2 EP0816025 A2 EP 0816025A2
Authority
EP
European Patent Office
Prior art keywords
scissors
leg
power supply
legs
electrically
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.)
Granted
Application number
EP97109486A
Other languages
German (de)
French (fr)
Other versions
EP0816025B1 (en
EP0816025A3 (en
Inventor
Günther Härle
Volker Heiss
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.)
JOSEF HEISS - MEDIZINTECHNIK GmbH
Original Assignee
JOSEF HEISS - MEDIZINTECHNIK 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
Priority claimed from DE1996126069 external-priority patent/DE19626069A1/en
Priority claimed from DE1996146190 external-priority patent/DE19646190A1/en
Application filed by JOSEF HEISS - MEDIZINTECHNIK GmbH filed Critical JOSEF HEISS - MEDIZINTECHNIK GmbH
Priority to DE29723328U priority Critical patent/DE29723328U1/en
Publication of EP0816025A2 publication Critical patent/EP0816025A2/en
Publication of EP0816025A3 publication Critical patent/EP0816025A3/en
Application granted granted Critical
Publication of EP0816025B1 publication Critical patent/EP0816025B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B13/00—Hand shears; Scissors
    • B26B13/22—Hand shears; Scissors combined with auxiliary implements, e.g. with cigar cutter, with manicure instrument
    • B26B13/24—Hand shears; Scissors combined with auxiliary implements, e.g. with cigar cutter, with manicure instrument to aid hair cutting

Definitions

  • the present invention relates to an electrically heatable Scissors according to the preamble of claim 1.
  • Such scissors are known from EP 0 538 306 B1.
  • this scissors is in a recess of each leg a heating resistor housed, the heating resistors electrically connected in series in both legs are.
  • the legs exist at least in the cutting area from a single material, that can be heated electrically and with the power supply is electrically connected. Surprisingly, namely pointed out that direct current heating of the Cutting area is possible, eliminating any external heating can be omitted because the cutting edge itself forms the radiator. Also with this variant there are no deposits or additional layers required, making a very simple Manufacturing is possible. By using a Steel with a high melting point and by appropriate Control of the current flowing through the legs prevent sparking and premature aging exclude the material.
  • the layer or insert can be energized in such a way that the heating current is essentially parallel to the respective Thigh flows. This causes the heating on the entire length of the cutting edge.
  • the Layer or insert can be provided on both legs, whereby the two layers or deposits can be energized in this way are that the heating current between the shear point of the scissors between the two layers or deposits flows.
  • the Heating current between the shear point of the scissors between the two layers or deposits flows.
  • the scissors by the touch of the two Cutting is formed.
  • the two cutting edges close the circuit, the voltage drop between selectively apply heat to the two layers or inserts the place where it is needed.
  • the Legs are made of a material whose electrical and / or thermal conductivity lower than that of Layer or the insert is made of steel, for example consists. This allows the heat development on the Limit the area of the cutting edge, however, the legs the scissors outside the cutting edges are not or only slightly heat. This creates any risk of burns locked out. At the same time is the energy requirement significantly reduced because only a very limited volume warms up must become.
  • the layer can also be provided or insert opposite the associated leg electrically and / or to insulate completely thermally.
  • the Both legs can be energized in such a way that the heating current about the shear point of the scissors between the two legs flows.
  • the heating current about the shear point of the scissors between the two legs flows.
  • the two Cutting thus close the circuit, with the Voltage drop between the two layers or deposits selective heat is released at the point where it is needed becomes.
  • the power supply of the scissors can be in the grip area Leg should be arranged, with this leg an electrically conductive spring contact is located with a Contact in the grip area of the other leg in connection stands. This is a sliding contact between formed the two handle areas over which the current is conducted becomes.
  • the power supply is arranged in the grip area of a leg be on which there is an electrically conductive ribbon cable located. This ribbon cable is with the grip area of the other leg connected and points in the middle the scissors open at a break point. This allows the Operate the scissors as usual, using the flexible ribbon cable remains between the grip areas of the scissors without that it bothers.
  • the cutting edge according to the invention can either be a thin one Layer be applied to the respective leg or be designed as an insert (ticking), which in one leg is incorporated and from this in the area of Cutting edge protrudes slightly.
  • the Element connecting the two legs be electrically isolated. This avoids that a short circuit current over the connection of the two legs flows if it is completely made of electrically conductive Material are made. It is special here advantageous if the area surrounding the element each Leg is electrically isolated, because then also when pressed The scissors ensure that in the area of the joint no electrical short circuit is established.
  • each leg can be made of insulating material in the grip area Material and in the cutting area made of electrically conductive Material be made, the connection between the two legs in the isolated area is.
  • an electrically conductive element can also be used be used.
  • this a power supply for a pair of scissors which is a power control device which has the between the legs flowing starting current limited.
  • a power supply can prevent sparking by after every power interruption, for example by complete Open the scissors or by jamming the material to be cut between the legs, the starting current from a low Value increases to a high value.
  • Fig. 1 shows a first embodiment of an electrically heatable Scissors with two legs 10, 12, one over Screw 14 are articulated and one each Have grip area 16, 18 and a cutting area 20, 22.
  • the grip area 16, 18 of each leg 10, 12 has a finger opening in the usual way.
  • At the bottom A region of the finger opening of the leg 12 is a power supply 28 attached.
  • FIG. 1 shows a section through the cutting areas 20 and 22 at the current shear point Scissors. As can be seen clearly, is on both legs 20, 22 each as an actual cutting edge, an electrically heatable Layer 24, 26 provided. The actual cut is not through the cutting areas 20, 22 of the Legs 10, 12, but carried out by layers 24, 26, that serve as cutting.
  • the two layers 24, 26 energized in such a way that the heating current essentially parallel to the respective leg 10, 12 flows.
  • the power line between a power supply 28 and the two layers 24, 26 take place here Lines not shown, which are inside the Legs are arranged. So at each of the results Leg a voltage gradient, which is exemplary for the leg 10 is indicated with "+" and "-".
  • Fig. 2 shows a second embodiment of an electrical heatable scissors which are similar in construction to that in FIG. 1 illustrated scissors. That is why are for equal parts the same reference numerals are used.
  • the scissors shown in Fig. 2 also have two Layers 24, 26, each serving as a cutting edge and are applied to each leg 10, 12. At In this embodiment, these two layers 24, 26 however so energized that the heating current above the shear point S flows between the two layers 24 and 26. Exemplary is indicated in Fig. 2 that the layer 26 on positive and layer 24 is at negative potential.
  • the the two legs 10, 12 are mutually electrical isolated.
  • an electric conductive ribbon cable 34 attached to the Handle area 16 of the other leg 10 is connected.
  • the Ribbon cable 34 is symmetrical and has in a break point 36 in the middle of the scissors.
  • the scissors can be operated in the usual way, the Ribbon cables arranged between the two grip areas has no disruptive influence.
  • FIG 3 shows an alternative embodiment of a electrically heated scissors with two legs 10, 12, which are articulated via a screw 14 and each a grip area 16, 18 and a cutting area 20, 22 have.
  • the grip area 16, 18 of each leg 10, 12 has a finger opening in the usual way. in the lower region of the finger opening of the leg 12 is one Power supply 28 attached.
  • FIG. 3 shows a section through the cutting areas 20 and 22 at the current shear point S the scissors.
  • both legs exist made of a single material, just like one conventional scissors is the case.
  • Trade in the material steel with a high melting point, the Material also surface-finished in certain applications can be.
  • the two Cutting areas 20, 22 energized such that the heating current essentially parallel to the respective leg 10, 12 flows.
  • the power line between a power supply 28 and the two cutting areas 20, 22 takes place here by lines not shown, which are inside the legs are arranged.
  • the heating current flows on Shear point S between the two legs 10 and 12.
  • the grip area 18 of the leg 12 there can also be an electrical conductive ribbon cable attached to the Handle area 16 of the other leg 10 is connected.
  • the Ribbon cable can be symmetrical and in the Have a kink in the middle of the scissors. This leaves operate the scissors in the usual way, the between ribbon cables arranged in the two grip areas has no disruptive influence.
  • a power supply unit is used to operate the scissors according to the invention provided that has a current control device, which limits the starting current flowing between the legs.
  • a current control device which limits the starting current flowing between the legs.
  • Such an "intelligent" power supply ensures that after closing the circuit, i.e. after touching the cutting areas 20, 22 of the legs 10, 12 there was no sudden increase in current. Hereby will spark and damage the Cutting material prevented.
  • the one after each new one Closing the resulting starting current is in the power supply is controlled so that it is within a predetermined Duration increases to a desired final value.
  • the power supply can be used for direct current, alternating current and also be designed for high-frequency alternating current.
  • the scissors according to the invention can be used in addition to for cutting hair also extremely beneficial in medical Use area.
  • Tissues or vessels have so far only been bipolar forceps been used.
  • the current flows from one end of the tweezers through the tissue to be coagulated into the other end of the tweezers.
  • the tweezers ends do not heat up significantly and heating and thus coagulation only takes place in the tissue itself instead.
  • scissors for coagulating have the advantage that the coagulation of the tissue through the hot scissor blades takes place and the current flow through the tissue is minimized is.
  • the scissors according to the invention can be used for coagulation use of vessels and tissue of a general nature. One application is both in microsurgical as also possible in the general surgical field.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Surgical Instruments (AREA)
  • Scissors And Nippers (AREA)
  • Discharge Heating (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Gloves (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Steering Controls (AREA)

Abstract

The scissors has its two limbs (10,12) held together by screw (14) and their cutting edges are heated by DC or AC supplied to the coatings (24,26) from a connection (28) on one of the handles. The same handle carries a conductive spring contact (30) which is pressed against a contact (32) on the other handle when a cutting operation is performed. The limbs are manufactured of steel with a high melting point and their surfaces can be treated to prevent corrosion for particular applications. Their handles can be joined by a flat ribbon cable of symmetrical shape with a bend in the middle.

Description

Die vorliegende Erfindung betrifft eine elektrisch beheizbare Schere nach dem Oberbegriff des Anspruchs 1.The present invention relates to an electrically heatable Scissors according to the preamble of claim 1.

Eine derartige Schere ist aus der EP 0 538 306 B1 bekannt. In dieser Schere ist in einer Vertiefung jedes Schenkels ein Heizwiderstand untergebracht, wobei die Heizwiderstände in beiden Schenkein elektrisch miteinander in Reihe geschaltet sind.Such scissors are known from EP 0 538 306 B1. In this scissors is in a recess of each leg a heating resistor housed, the heating resistors electrically connected in series in both legs are.

Es ist die Aufgabe der vorliegenden Erfindung, eine Schere der eingangs genannten Art einfacher, jedoch gleichzeitig effektiver auszubilden.It is the object of the present invention to use scissors of the type mentioned at the beginning, but at the same time educate more effectively.

Die Lösung dieser Aufgabe erfolgt gemäß einer ersten Ausführungsform dadurch, daß zumindest einer der Schenkel als Schneide eine elektrisch erwärmbare Schicht oder Einlage aufweist, die mit der Stromzuführung elektrisch verbunden ist. Erfindungsgemäß wird also als Schneide eine elektrisch erwärmbare Schicht oder Einlage verwendet, die durch Bestromen direkt beheizt wird. Erfindungsgemäß ist somit keine Fremdheizung erforderlich, da die Schneide selbst den Heizkörper bildet. Hieraus ergibt sich der große Vorteil, daß die Wärme direkt und nur in der Schneide (und nicht in dem gesamten Schneidebereich) entsteht, wodurch wesentlich weniger Energie aufgewendet werden muß, als wenn der gesamte Schneidebereich erwärmt würde. Da tatsächlich nur die Schneide erwärmt wird, bleibt der übrige Schneidebereich jedes Schenkels wesentlich kühler als die Schneide, so daß eine Verbrennungsgefahr ausgeschlossen ist.This object is achieved according to a first embodiment in that at least one of the legs as Cut an electrically heatable layer or insert has, which is electrically connected to the power supply is. According to the invention, the cutting edge becomes electrical heatable layer or insert used by energizing is heated directly. According to the invention there is therefore none External heating is required because the cutting edge itself Radiator forms. This gives the big advantage that the heat is direct and only in the cutting edge (and not in the entire cutting area), which is essential less energy has to be used than if the whole Cutting area would be heated. Because actually only that If the cutting edge is heated, the remaining cutting area remains each leg much cooler than the cutting edge, so that a risk of burns is excluded.

Bei einer alternativen Ausführungsform bestehen die Schenkel zumindest im Schneidebereich aus einem einzigen Material, das elektrisch erwärmbar und mit der Stromzuführung elektrisch verbunden ist. Überraschenderweise hat sich nämlich herausgestellt, daß auch eine direkte Stromheizung des Schneidebereichs möglich ist, wodurch jegliche Fremdheizung wegfallen kann, da die Schneide selbst den Heizkörper bildet. Auch sind bei dieser Variante keinerlei Einlagen oder zusätzliche Schichten erforderlich, wodurch eine sehr einfache Herstellung möglich ist. Durch Verwendung eines Stahls mit hohem Schmelzpunkt und durch entsprechende Steuerung des durch die Schenkel fließenden Stromes läßt sich eine Funkenbildung verhindern und eine vorzeitige Alterung des Materials ausschließen.In an alternative embodiment, the legs exist at least in the cutting area from a single material, that can be heated electrically and with the power supply is electrically connected. Surprisingly, namely pointed out that direct current heating of the Cutting area is possible, eliminating any external heating can be omitted because the cutting edge itself forms the radiator. Also with this variant there are no deposits or additional layers required, making a very simple Manufacturing is possible. By using a Steel with a high melting point and by appropriate Control of the current flowing through the legs prevent sparking and premature aging exclude the material.

Vorteilhafte Ausführungsformen der Erfindung sind in der Beschreibung, der Zeichnung und den Unteransprüchen beschrieben.Advantageous embodiments of the invention are in the Description, the drawing and the subclaims are described.

So kann die Schicht oder Einlage derart bestrombar sein, daß der Heizstrom im wesentlichen parallel zum jeweiligen Schenkel fließt. Hierdurch erfolgt die Erwärmung auf der gesamten Länge der Schneide.So the layer or insert can be energized in such a way that the heating current is essentially parallel to the respective Thigh flows. This causes the heating on the entire length of the cutting edge.

Nach einer weiteren Ausbildung der Erfindung kann die Schicht oder Einlage an beiden Schenkeln vorgesehen sein, wobei die beiden Schichten oder Einlagen derart bestrombar sind, daß der Heizstrom über den Scherpunkt der Schere zwischen den beiden Schichten oder Einlagen fließt. Bei dieser Ausführungsform erwärmt sich lediglich der momentane Scherpunkt der Schere, der durch die Berührung der beiden Schneiden gebildet wird. Die beiden Schneiden schließen somit den Stromkreis, wobei durch den Spannungsabfall zwischen den beiden Schichten oder Einlagen punktuell Wärme an der Stelle frei wird, an der sie benötigt wird. According to a further embodiment of the invention, the Layer or insert can be provided on both legs, whereby the two layers or deposits can be energized in this way are that the heating current between the shear point of the scissors between the two layers or deposits flows. At this Embodiment only warms the current shear point the scissors by the touch of the two Cutting is formed. The two cutting edges close the circuit, the voltage drop between selectively apply heat to the two layers or inserts the place where it is needed.

Nach einer weiteren Ausbildung der Erfindung kann der Schenkel aus einem Material bestehen, dessen elektrische und/oder thermische Leitfähigkeit geringer als die der Schicht oder der Einlage ist, die beispielsweise aus Stahl besteht. Hierdurch läßt sich die Wärmeentwicklung auf den Bereich der Schneiden begrenzen, wobei jedoch die Schenkel der Schere außerhalb der Schneiden sich nicht oder nur geringfügig erwärmen. Hierdurch ist jegliche Verbrennungsgefahr ausgeschlossen. Gleichzeitig ist der Energiebedarf deutlich verringert, da nur ein sehr begrenztes Volumen erwärmt werden muß. Auch kann vorgesehen werden, die Schicht oder Einlage gegenüber dem zugehörigen Schenkel elektrisch und/oder thermisch vollständig zu isolieren.According to a further embodiment of the invention, the Legs are made of a material whose electrical and / or thermal conductivity lower than that of Layer or the insert is made of steel, for example consists. This allows the heat development on the Limit the area of the cutting edge, however, the legs the scissors outside the cutting edges are not or only slightly heat. This creates any risk of burns locked out. At the same time is the energy requirement significantly reduced because only a very limited volume warms up must become. The layer can also be provided or insert opposite the associated leg electrically and / or to insulate completely thermally.

Nach einer weiteren Ausbildung der Erfindung können die beiden Schenkel derart bestrombar sind, daß der Heizstrom über den Scherpunkt der Schere zwischen den beiden Schenkeln fließt. Bei dieser Ausführungsform erwärmt sich lediglich der momentane Scherpunkt der Schere, der durch die Berührung der beiden Schneiden gebildet wird. Die beiden Schneiden schließen somit den Stromkreis, wobei durch den Spannungsabfall zwischen den beiden Schichten oder Einlagen punktuell Wärme an der Stelle frei wird, an der sie benötigt wird.According to a further embodiment of the invention, the Both legs can be energized in such a way that the heating current about the shear point of the scissors between the two legs flows. In this embodiment, only heats up the current shear point of the scissors, which is due to the touch of the two cutting edges is formed. The two Cutting thus close the circuit, with the Voltage drop between the two layers or deposits selective heat is released at the point where it is needed becomes.

Die Stromzuführung der Schere kann im Griffbereich eines Schenkels angeordnet sein, wobei sich an diesem Schenkel ein elektrisch leitender Federkontakt befindet, der mit einem Kontakt im Griffbereich des anderen Schenkels in Verbindung steht. Hierdurch ist ein Schleifkontakt zwischen den beiden Griffbereichen gebildet, über den der Strom geleitet wird. Nach einer alternativen Ausführungsform kann die Stromzuführung im Griffbereich eines Schenkels angeordnet sein, an dem sich ein elektrisch leitendes Flachbandkabel befindet. Dieses Flachbandkabel ist mit dem Griffbereich des anderen Schenkels verbunden und weist in der Mitte der Schere einen Knickpunkt auf. Hierdurch läßt sich die Schere wie gewohnt betätigen, wobei das flexible Flachbandkabel zwischen den Griffbereichen der Schere verbleibt, ohne daß es stört.The power supply of the scissors can be in the grip area Leg should be arranged, with this leg an electrically conductive spring contact is located with a Contact in the grip area of the other leg in connection stands. This is a sliding contact between formed the two handle areas over which the current is conducted becomes. According to an alternative embodiment the power supply is arranged in the grip area of a leg be on which there is an electrically conductive ribbon cable located. This ribbon cable is with the grip area of the other leg connected and points in the middle the scissors open at a break point. This allows the Operate the scissors as usual, using the flexible ribbon cable remains between the grip areas of the scissors without that it bothers.

Die erfindungsgemäße Schneide kann entweder als dünne Schicht auf den jeweiligen Schenkel aufgebracht sein oder als Einlage (Inlett) ausgebildet sein, die in einen Schenkel eingearbeitet ist und aus diesem im Bereich der Schneidkante etwas vorsteht.The cutting edge according to the invention can either be a thin one Layer be applied to the respective leg or be designed as an insert (ticking), which in one leg is incorporated and from this in the area of Cutting edge protrudes slightly.

Nach einer weiteren Ausbildung der Erfindung kann das die Verbindung zwischen den beiden Schenkeln herstellende Element elektrisch isoliert sein. Hierdurch wird vermieden, daß über die Verbindung der beiden Schenkel ein Kurzschlußstrom fließt, falls diese vollständig aus elektrisch leitendem Material hergestellt sind. Hierbei ist es besonders vorteilhaft, wenn der das Element umgebende Bereich jedes Schenkels elektrisch isoliert ist, da dann auch beim Betätigen der Schere sichergestellt ist, daß im Bereich des Gelenkes kein elektrischer Kurzschluß hergestellt wird.After a further embodiment of the invention, the Element connecting the two legs be electrically isolated. This avoids that a short circuit current over the connection of the two legs flows if it is completely made of electrically conductive Material are made. It is special here advantageous if the area surrounding the element each Leg is electrically isolated, because then also when pressed The scissors ensure that in the area of the joint no electrical short circuit is established.

Alternativ kann jeder Schenkel im Griffbereich aus isolierendem Material und im Schneidebereich aus elektrisch leitendem Material hergestellt sein, wobei die Verbindung zwischen den beiden Schenkeln im isolierten Bereich angeordnet ist. In diesem Fall kann auch ein elektrisch leitendes Element verwendet werden.Alternatively, each leg can be made of insulating material in the grip area Material and in the cutting area made of electrically conductive Material be made, the connection between the two legs in the isolated area is. In this case, an electrically conductive element can also be used be used.

Nach einem weiteren Aspekt der vorliegenden Erfindung betrifft diese ein Netzteil für eine Schere, das eine Stromsteuereinrichtung aufweist, die den zwischen den Schenkeln fließenden Anlaufstrom begrenzt. Durch ein derartiges Netzteil läßt sich eine Funkenbildung verhindern, indem nach jeder Stromunterbrechung, beispielsweise durch vollständiges Öffnen der Schere oder durch Verklemmen von Schneidgut zwischen den Schenkeln, der Anlaufstrom von einem niedrigen Wert auf einen hohen Wert ansteigt.According to another aspect of the present invention this a power supply for a pair of scissors, which is a power control device which has the between the legs flowing starting current limited. With such a power supply can prevent sparking by after every power interruption, for example by complete Open the scissors or by jamming the material to be cut between the legs, the starting current from a low Value increases to a high value.

Nachfolgend wird die Erfindung rein beispielhaft anhand einer vorteilhafter Ausführungsform und unter Bezugnahme auf die beigefügten Zeichnung beschrieben. Es zeigen:

Fig. 1
eine erste Ausführungsform einer elektrisch beheizbaren Schere;
Fig. 2
eine zweite Ausführungsform einer elektrisch beheizbaren Schere; und
Fig. 3
eine dritte Ausführungsform einer elektrisch beheizbaren Schere.
The invention is described below purely by way of example using an advantageous embodiment and with reference to the accompanying drawing. Show it:
Fig. 1
a first embodiment of an electrically heated scissors;
Fig. 2
a second embodiment of an electrically heated scissors; and
Fig. 3
a third embodiment of an electrically heated scissors.

Fig. 1 zeigt eine erste Ausbildung einer elektrisch beheizbaren Schere mit zwei Schenkeln 10, 12, die über eine Schraube 14 gelenkig verbunden sind und jeweils einen Griffbereich 16, 18 und einen Schneidebereich 20, 22 aufweisen. Der Griffbereich 16, 18 jedes Schenkels 10, 12 weist in üblicher Weise eine Fingeröffnung auf. Im unteren Bereich der Fingeröffnung des Schenkels 12 ist eine Stromzuführung 28 befestigt.Fig. 1 shows a first embodiment of an electrically heatable Scissors with two legs 10, 12, one over Screw 14 are articulated and one each Have grip area 16, 18 and a cutting area 20, 22. The grip area 16, 18 of each leg 10, 12 has a finger opening in the usual way. At the bottom A region of the finger opening of the leg 12 is a power supply 28 attached.

Die Querschnittansicht in Fig. 1 zeigt einen Schnitt durch die Schneidebereiche 20 und 22 im momentanen Scherpunkt der Schere. Wie gut zu erkennen ist, ist an beiden Schenkeln 20, 22 als eigentliche Schneide jeweils eine elektrisch erwärmbare Schicht 24, 26 vorgesehen. Der eigentliche Schnitt wird also nicht durch die Schneidebereiche 20, 22 der Schenkel 10, 12, sondern durch die Schichten 24, 26 durchgeführt, die als Schneiden dienen. The cross-sectional view in Fig. 1 shows a section through the cutting areas 20 and 22 at the current shear point Scissors. As can be seen clearly, is on both legs 20, 22 each as an actual cutting edge, an electrically heatable Layer 24, 26 provided. The actual cut is not through the cutting areas 20, 22 of the Legs 10, 12, but carried out by layers 24, 26, that serve as cutting.

Bei der in Fig. 1 dargestellten Ausführungsform werden die beiden Schichten 24, 26 derartig bestromt, daß der Heizstrom im wesentlichen parallel zum jeweiligen Schenkel 10, 12 fließt. Die Stromleitung zwischen einer Stromzuführung 28 und den beiden Schichten 24, 26 erfolgt hierbei durch nicht näher dargestellte Leitungen, die im Inneren der Schenkel angeordnet sind. Somit ergibt sich an jedem der Schenkel ein Spannungsgefälle, das für den Schenkel 10 beispielhaft mit "+" und "-" angedeutet ist.In the embodiment shown in Fig. 1, the two layers 24, 26 energized in such a way that the heating current essentially parallel to the respective leg 10, 12 flows. The power line between a power supply 28 and the two layers 24, 26 take place here Lines not shown, which are inside the Legs are arranged. So at each of the results Leg a voltage gradient, which is exemplary for the leg 10 is indicated with "+" and "-".

Zur Weiterleitung des elektrischen Heizstromes von der Stromzuführung 28, die an dem Schenkel 12 befestigt ist, zu dem Schenkel 10 befindet sich an dem Griffbereich 18 des Schenkels 12 ein elektrisch leitender Federkontakt 30, der mit einem weiteren Kontakt 32 am unteren Ende des Griffbereiches 16 des Schenkels 10 elektrisch leitend in Verbindung steht. Bei Betätigen der Schere liegt somit das Ende des Federkontaktes 30 an dem Kontakt 32 des Schenkels 10 gleitend an. Wie aus Fig. 1 gut zu erkennen ist, ist der Federkontakt in der Mitte der Schere geknickt ausgebildet und federt bei Öffnen der Schere nach.To forward the electrical heating current from the Power supply 28, which is attached to the leg 12 to the leg 10 is located on the grip area 18 of the Leg 12 is an electrically conductive spring contact 30, the with another contact 32 at the lower end of the handle area 16 of the leg 10 in an electrically conductive connection stands. When the scissors are operated, the end is now of the spring contact 30 on the contact 32 of the leg 10 sliding on. As can be clearly seen from FIG. 1, the Spring contact kinked in the middle of the scissors and springs back when the scissors are opened.

Fig. 2 zeigt eine zweite Ausführungsform einer elektrisch beheizbaren Schere, die im Aufbau ähnlich zu der in Fig. 1 dargestellten Schere ist. Deshalb sind für gleiche Teile gleiche Bezugszeichen verwendet.Fig. 2 shows a second embodiment of an electrical heatable scissors which are similar in construction to that in FIG. 1 illustrated scissors. That is why are for equal parts the same reference numerals are used.

Die in Fig. 2 dargestellte Schere weist ebenfalls zwei Schichten 24, 26 auf, die jeweils als Schneide dienen und auf jeweils einen Schenkel 10, 12 aufgebracht sind. Bei dieser Ausführungsform werden diese beiden Schichten 24, 26 jedoch so bestromt, daß der Heizstrom über den Scherpunkt S zwischen den beiden Schichten 24 und 26 fließt. Beispielhaft ist in Fig. 2 angedeutet, daß sich die Schicht 26 auf positivem und die Schicht 24 auf negativem Potential befindet.The scissors shown in Fig. 2 also have two Layers 24, 26, each serving as a cutting edge and are applied to each leg 10, 12. At In this embodiment, these two layers 24, 26 however so energized that the heating current above the shear point S flows between the two layers 24 and 26. Exemplary is indicated in Fig. 2 that the layer 26 on positive and layer 24 is at negative potential.

Bei der in Fig. 2 dargestellten Ausführungsform wird der elektrische Strom von der Stromzuführung 28 zu den Schichten 24 und 26 durch den Scherengrundkörper geleitet. Die beiden Schenkel 10, 12 sind dabei gegeneinander elektrisch isoliert. Im Griffbereich 18 des Schenkels 12 ist ein elektrisch leitendes Flachbandkabel 34 befestigt, das mit dem Griffbereich 16 des anderen Schenkels 10 verbunden ist. Das Flachbandkabel 34 ist symmetrisch ausgebildet und weist in der Mitte der Schere einen Knickpunkt 36 auf. Hierdurch läßt sich die Schere in üblicher Weise betätigen, wobei das zwischen den beiden Griffbereichen angeordnete Flachbandkabel keinen störenden Einfluß ausübt.In the embodiment shown in Fig. 2, the electrical current from the power supply 28 to the layers 24 and 26 passed through the scissor body. The the two legs 10, 12 are mutually electrical isolated. In the grip area 18 of the leg 12 is an electric conductive ribbon cable 34 attached to the Handle area 16 of the other leg 10 is connected. The Ribbon cable 34 is symmetrical and has in a break point 36 in the middle of the scissors. Hereby the scissors can be operated in the usual way, the Ribbon cables arranged between the two grip areas has no disruptive influence.

Die Fig. 3 zeigt eine alternative Ausführungsform einer elektrisch beheizbaren Schere mit zwei Schenkeln 10, 12, die über eine Schraube 14 gelenkig verbunden sind und jeweils einen Griffbereich 16, 18 und einen Schneidebereich 20, 22 aufweisen. Der Griffbereich 16, 18 jedes Schenkels 10, 12 weist in üblicher Weise eine Fingeröffnung auf. Im unteren Bereich der Fingeröffnung des Schenkels 12 ist eine Stromzuführung 28 befestigt.3 shows an alternative embodiment of a electrically heated scissors with two legs 10, 12, which are articulated via a screw 14 and each a grip area 16, 18 and a cutting area 20, 22 have. The grip area 16, 18 of each leg 10, 12 has a finger opening in the usual way. in the lower region of the finger opening of the leg 12 is one Power supply 28 attached.

Die Querschnittansicht in Fig. 3 zeigt einen Schnitt durch die Schneidebereiche 20 und 22 im momentanen Scherpunkt S der Schere. Wie gut zu erkennen ist, bestehen beide Schenkel aus einem einzigen Material, wie dies auch bei einer herkömmlichen Schere der Fall ist. Bei dem Material handelt es sich um Stahl mit einem hohen Schmelzpunkt, wobei das Material in bestimmten Anwendungsfällen auch oberflächenveredelt sein kann. The cross-sectional view in Fig. 3 shows a section through the cutting areas 20 and 22 at the current shear point S the scissors. As can be clearly seen, both legs exist made of a single material, just like one conventional scissors is the case. Trade in the material steel with a high melting point, the Material also surface-finished in certain applications can be.

Bei der dargestellten Ausführungsform werden die beiden Schneidebereiche 20, 22 derartig bestromt, daß der Heizstrom im wesentlichen parallel zum jeweiligen Schenkel 10, 12 fließt. Die Stromleitung zwischen einer Stromzuführung 28 und den beiden Schneidebereichen 20, 22 erfolgt hierbei durch nicht näher dargestellte Leitungen, die im Inneren der Schenkel angeordnet sind. Somit fließt der Heizstrom am Scherpunkt S zwischen den beiden Schenkeln 10 und 12.In the illustrated embodiment, the two Cutting areas 20, 22 energized such that the heating current essentially parallel to the respective leg 10, 12 flows. The power line between a power supply 28 and the two cutting areas 20, 22 takes place here by lines not shown, which are inside the legs are arranged. Thus the heating current flows on Shear point S between the two legs 10 and 12.

Zur Weiterleitung des elektrischen Heizstromes von der Stromzuführung 28, die an dem Schenkel 12 befestigt ist, zu dem Schenkel 10 befindet sich an dem Griffbereich 18 des Schenkels 12 ein elektrisch leitender Federkontakt 30, der mit einem weiteren Kontakt 32 am unteren Ende des Griffbereiches 16 des Schenkels 10 elektrisch leitend in Verbindung steht. Bei Betätigen der Schere liegt somit das Ende des Federkontaktes 30 an dem Kontakt 32 des Schenkels 10 gleitend an. Wie aus Fig. 3 gut zu erkennen ist, ist der Federkontakt in der Mitte der Schere geknickt ausgebildet und federt bei Öffnen der Schere nach.To forward the electrical heating current from the Power supply 28, which is attached to the leg 12 to the leg 10 is located on the grip area 18 of the Leg 12 is an electrically conductive spring contact 30, the with another contact 32 at the lower end of the handle area 16 of the leg 10 in an electrically conductive connection stands. When the scissors are operated, the end is now of the spring contact 30 on the contact 32 of the leg 10 sliding on. As can be clearly seen from FIG. 3, the Spring contact kinked in the middle of the scissors and springs back when the scissors are opened.

Im Griffbereich 18 des Schenkels 12 kann auch ein elektrisch leitendes Flachbandkabel befestigt sein, das mit dem Griffbereich 16 des anderen Schenkels 10 verbunden ist. Das Flachbandkabel kann symmetrisch ausgebildet sein und in der Mitte der Schere einen Knickpunkt aufweisen. Hierdurch läßt sich die Schere in üblicher Weise betätigen, wobei das zwischen den beiden Griffbereichen angeordnete Flachbandkabel keinen störenden Einfluß ausübt.In the grip area 18 of the leg 12 there can also be an electrical conductive ribbon cable attached to the Handle area 16 of the other leg 10 is connected. The Ribbon cable can be symmetrical and in the Have a kink in the middle of the scissors. This leaves operate the scissors in the usual way, the between ribbon cables arranged in the two grip areas has no disruptive influence.

Für den Betrieb der erfindungsgemäßen Schere ist ein Netzteil vorgesehen, das eine Sromsteuereinrichtung aufweist, die den zwischen den Schenkeln fließenden Anlaufstrom begrenzt. Ein derartiges "intelligentes" Netzteil sorgt dafür, daß nach einem Schließen des Stromkreises, d.h. nach einer Berührung der Schneidenbereiche 20, 22 der Schenkel 10, 12 kein zu plötzlicher Stromanstieg erfolgt. Hierdurch wird eine Funkenbildung und somit eine Beschädigung des Schneidematerials verhindert. Der nach jedem erneuten Schließen des Stromkreises entstehende Anlaufstrom wird in dem Netzteil so gesteuert, daß er innerhalb einer vorbestimmten Zeitdauer auf einen gewünschten Endwert ansteigt.A power supply unit is used to operate the scissors according to the invention provided that has a current control device, which limits the starting current flowing between the legs. Such an "intelligent" power supply ensures that after closing the circuit, i.e. after touching the cutting areas 20, 22 of the legs 10, 12 there was no sudden increase in current. Hereby will spark and damage the Cutting material prevented. The one after each new one Closing the resulting starting current is in the power supply is controlled so that it is within a predetermined Duration increases to a desired final value.

Durch Verwendung der oben beschriebenen Schere mit dem erfindungsgemäßen Netzteil lassen sich gute Ergebnisse erzielen, da keine Funkenbildung auftritt und dennoch ein wirksames Versiegeln von Haaren möglich ist.By using the scissors described above with the inventive Power supply can achieve good results, since no sparking occurs and still an effective one Sealing hair is possible.

Das Netzteil kann für Gleichstrom, Wechselstrom und auch für hochfrequenten Wechselstrom ausgelegt sein.The power supply can be used for direct current, alternating current and also be designed for high-frequency alternating current.

Die erfindungsgemäße Schere läßt sich neben der Verwendung zum Schneiden von Haaren auch äußerst vorteilhaft im medizinischen Bereich verwenden. Zum Zwecke der Koagulation von Gewebe oder Gefäßen sind bislang nur bipolare Pinzetten verwendet worden. Bei Verwendung derartiger Pinzetten fließt jedoch der Strom von einem Pinzettenende durch das zu koagulierende Gewebe in das andere Pinzettenende. Hierbei erhitzen sich die Pinzettenenden nicht wesentlich und eine Erhitzung und somit eine Koagulation findet nur im Gewebe selbst statt. Durch die Verwendung der erfindungsgemäßen Schere zum Koagulieren ergibt sich jedoch der Vorteil, daß die Koagulation des Gewebes durch die heißen Scherenblätter erfolgt und der Stromfluß durch das Gewebe minimiert ist. Die erfindungsgemäße Schere läßt sich zum Koagulieren von Gefäßen und von Gewebe allgemeiner Art verwenden. Eine Anwendung ist sowohl im mikrochirurgischen wie auch im allgemein chirurgischen Bereich möglich.The scissors according to the invention can be used in addition to for cutting hair also extremely beneficial in medical Use area. For the purpose of coagulating Tissues or vessels have so far only been bipolar forceps been used. When using such tweezers however, the current flows from one end of the tweezers through the tissue to be coagulated into the other end of the tweezers. Here the tweezers ends do not heat up significantly and heating and thus coagulation only takes place in the tissue itself instead. By using the invention However, scissors for coagulating have the advantage that the coagulation of the tissue through the hot scissor blades takes place and the current flow through the tissue is minimized is. The scissors according to the invention can be used for coagulation use of vessels and tissue of a general nature. One application is both in microsurgical as also possible in the general surgical field.

Claims (14)

Elektrisch beheizbare Schere mit zwei Schenkeln (10, 12), die gelenkig verbunden sind und jeweils einen Griffbereich (16, 18) und einen Schneidebereich (20, 22) aufweisen, und mit einer Stromzuführung (28),
dadurch gekennzeichnet, daß
zumindest einer der Schenkel (10, 12) als Schneide eine elektrisch erwärmbare Schicht (24, 26) oder Einlage aufweist, die mit der Stromzuführung (28) elektrisch verbunden ist oder daß die Schenkel (10, 12) zumindest im Schneidebereich aus einem einzigen Material bestehen, das elektrisch erwärmbar und mit der Stromzuführung (28) elektrisch verbunden ist.Electrically heatable scissors with two legs (10, 12) which are articulated and each have a handle area (16, 18) and a cutting area (20, 22), and with a power supply (28),
characterized in that
at least one of the legs (10, 12) has as a cutting edge an electrically heatable layer (24, 26) or insert which is electrically connected to the power supply (28) or that the legs (10, 12) are made of a single material, at least in the cutting area exist, which is electrically heated and electrically connected to the power supply (28). Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß
die Schicht (24, 26) oder Einlage derart bestrombar ist, daß der Heizstrom im wesentlichen parallel zum jeweiligen Schenkel (10, 12) fließt.Device according to claim 1,
characterized in that
the layer (24, 26) or insert can be energized in such a way that the heating current flows essentially parallel to the respective leg (10, 12). Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß
die beiden Schichten oder Einlagen oder die beiden Schneidebereiche (20, 22) derart bestrombar sind, daß der Heizstrom über den Scherpunkt (S) der Schere zwischen diesen fließt, wobei vorzugsweise die Schicht (24, 26) oder Einlage an beiden Schenkeln (10, 12) vorgesehen ist. Device according to claim 1,
characterized in that
the two layers or inserts or the two cutting areas (20, 22) can be energized such that the heating current flows between them via the shear point (S) of the scissors, the layer (24, 26) or insert on both legs (10, 12) is provided. Vorrichtung nach zumindest einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß
der Schenkel (10, 12) aus einem Material besteht, dessen elektrische und/oder thermische Leitfähigkeit geringer als die der Schicht oder Einlage ist.Device according to at least one of the preceding claims,
characterized in that
the leg (10, 12) consists of a material whose electrical and / or thermal conductivity is lower than that of the layer or insert. Vorrichtung nach zumindest einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß
die Schicht (24, 26) oder Einlage gegenüber dem zugehörigen Schenkel (10, 12) oder der Schneidebereich (20, 22) gegenüber dem Griffbereich (16, 18) elektrisch und/oder thermisch isoliert ist.Device according to at least one of the preceding claims,
characterized in that
the layer (24, 26) or insert is electrically and / or thermally insulated from the associated leg (10, 12) or the cutting area (20, 22) from the handle area (16, 18). Vorrichtung nach zumindest einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß
die Stromzuführung (28) im Griffbereich (18) eines Schenkels (12) angeordnet ist, an dem sich ein elek trisch leitender Federkontakt (30) befindet, der mit einem Kontakt (32) im Griffbereich (16) des anderen Schenkels (10) in Verbindung steht.Device according to at least one of the preceding claims,
characterized in that
the power supply (28) in the handle area (18) of a leg (12) is arranged on which there is an electrically conductive spring contact (30) with a contact (32) in the handle area (16) of the other leg (10) in Connection is established. Vorrichtung nach zumindest einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß
die Stromzuführung (28) im Griffbereich (18) eines Schenkels (12) angeordnet ist, an dem sich ein elektrisch leitendes Flachbandkabel (34) befindet, das mit dem Griffbereich (16) des anderen Schenkels (10) verbunden ist und in der Mitte der Schere einen Knickpunkt (36) aufweist. Device according to at least one of the preceding claims,
characterized in that
the power supply (28) is arranged in the handle area (18) of one leg (12), on which there is an electrically conductive ribbon cable (34) which is connected to the handle area (16) of the other leg (10) and in the middle of the Scissors has a break point (36). Vorrichtung nach zumindest einem der vorstehenden Ansprüche,
dadurch gekennzeichnet, daß
das die Verbindung zwischen den beiden Schenkeln (10, 12) herstellende Element (14) elektrisch isoliert ist.Device according to at least one of the preceding claims,
characterized in that
the element (14) producing the connection between the two legs (10, 12) is electrically insulated. Vorrichtung nach Anspruch 8,
dadurch gekennzeichnet, daß
der das Element (14) umgebende Bereich jedes Schenkels (10, 12) elektrisch isoliert ist.Device according to claim 8,
characterized in that
the region of each leg (10, 12) surrounding the element (14) is electrically insulated. Netzteil für eine Schere nach zumindest einem der vorstehenden Ansprüche,
gekennzeichnet durch
eine Stromsteuereinrichtung, die den zwischen den Schenkeln fließenden Anlaufstrom begrenzt.Power supply for scissors according to at least one of the preceding claims,
characterized by
a current control device that limits the starting current flowing between the legs. Netzteil nach Anspruch 10,
dadurch gekennzeichnet, daß
der Anlaufstrom nach jedem erneuten Schließen des Verbraucherstromkreises innerhalb einer vorbestimmten Zeitdauer auf den gewünschten Endwert ansteigt.Power supply according to claim 10,
characterized in that
the starting current rises to the desired final value within a predetermined period of time after the consumer circuit is closed again. Netzteil nach einem der Ansprüche 10 oder 11,
dadurch gekennzeichnet, daß
als Ausgangsstrom ein Gleichstrom, ein Wechselstrom oder ein hochfrequenter Wechselstrom erzeugbar ist.Power supply according to one of claims 10 or 11,
characterized in that
a direct current, an alternating current or a high-frequency alternating current can be generated as the output current. Kombination einer Schere nach zumindest einem der vorstehenden Ansprüche 1 bis 9 mit einem Netzteil nach einem der Ansprüche 10 bis 12. Combination of scissors according to at least one of the above Claims 1 to 9 with a power supply one of claims 10 to 12. Verwendung einer elektrisch beheizbaren Schere nach zumindest einem der Ansprüche 1 bis 9 zum Koagulieren von Gefäßen oder Gewebe.Using an electrically heated scissors after at least one of claims 1 to 9 for coagulating of vessels or tissue.
EP97109486A 1996-06-28 1997-06-11 Electrically heated scissors Expired - Lifetime EP0816025B1 (en)

Priority Applications (1)

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DE29723328U DE29723328U1 (en) 1996-06-28 1997-06-11 Electrically heated scissors

Applications Claiming Priority (4)

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DE1996126069 DE19626069A1 (en) 1996-06-28 1996-06-28 Electrically heated scissors with resistive coating on each limb
DE19626069 1996-06-28
DE1996146190 DE19646190A1 (en) 1996-11-08 1996-11-08 Electrically heated scissors with resistive coating on each limb
DE19646190 1996-11-08

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EP0816025A3 EP0816025A3 (en) 1999-02-24
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AT (1) ATE204222T1 (en)
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ES (1) ES2162660T3 (en)

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EP0816025B1 (en) 2001-08-16
DE29702608U1 (en) 1997-04-17
ES2162660T3 (en) 2002-01-01
US6060695A (en) 2000-05-09
EP0816025A3 (en) 1999-02-24
DE59704279D1 (en) 2001-09-20
JPH1080581A (en) 1998-03-31
ATE204222T1 (en) 2001-09-15

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