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Surgical instrument e.g. surgical pliers, clamping tool, cutting tool, has rotation lock that has indentation bar engaging indentation return to fix movable handles of surgical instrument in closed position

Info

Publication number
DE10314072A1
DE10314072A1 DE2003114072 DE10314072A DE10314072A1 DE 10314072 A1 DE10314072 A1 DE 10314072A1 DE 2003114072 DE2003114072 DE 2003114072 DE 10314072 A DE10314072 A DE 10314072A DE 10314072 A1 DE10314072 A1 DE 10314072A1
Authority
DE
Grant status
Application
Patent type
Prior art keywords
indentation
handles
position
closed
bar
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
DE2003114072
Other languages
German (de)
Other versions
DE10314072B4 (en )
Inventor
Rupert Dipl.-Ing. Mayenberger
Jens Ole Dipl.-Ing. Weißgraf
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.)
Aesculap AG
Original Assignee
Aesculap AG
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

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/2812Surgical forceps with a single pivotal connection
    • A61B17/2833Locking means
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B2017/2946Locking means

Abstract

The instrument (1) has two opposing movable handles (3,4), and a rotation lock for fixing the handles in closed position. The rotation lock includes an indentation bar (14) on one handle (3) and an indentation return (25) on the other handle (4). The indentation bar engages the indentation return to fix the handles in closed position. The indentation bar can be moved in release position through cam motion to open the handles from closed position.

Description

  • [0001] [0001]
    Die Erfindung betrifft ein chirurgisches Instrument mit zwei gegeneinander bewegbaren Griffteilen und mit einer Umlaufsperre zur gegenseitigen Fixierung der Griffteile in einer Schließstellung und zur Lösung der Fixierung beim weiteren Annähern der Griffteile über die Schließstellung hinaus in eine Öffnungsstellung, die an einem ersten Griffteil einen Rastrücksprung und an einem zweiten Griffteil eine in diesen eingreifende und dadurch die Griffteile in der Schließstellung fixierende Raste umfaßt, die beim Schließen der Griffteile an einer Seite des Rastrücksprunges vorbeibewegt wird und beim Öffnen auf der anderen. The invention relates to a surgical instrument with two relatively movable handle portions and with a circulation check for mutual fixing of the handle parts in a closed position and to the solution of the fixing during the further approach of the handle parts over the closing position into an opening position, at a first handle portion comprises a locking recess and a second handle portion an engaging in these and thereby comprises grip members in the closed position fixing notch, which is moved past one side of the latch return jump during closing of the handle members and the opening on the other.
  • [0002] [0002]
    Chirurgische Instrumente dieser Art werden mit einer solchen Umlaufsperre ausgestattet, damit die beiden Griffteile in der Schließstellung fixiert und in einfacher Weise durch erneutes Gegeneinanderdrücken der Griffteile wieder voneinander gelöst werden können. Surgical instruments of this kind are provided with such a circulation check, so that the two handle parts is fixed in the closed position and can be solved by re-pressing together the handle parts from each other again in a simple manner. Beispielsweise ist ein solches Instrument aus der For example, such an instrument from the DE 42 07 124 C1 DE 42 07 124 C1 bekannt. known.
  • [0003] [0003]
    Bei all diesen Instrumenten besteht das Problem, daß beim Schließen der Griffteile darauf geachtet werden muß, die Griffteile nicht zu weit einander anzunähern, da sonst die Raste am Rastrücksprung vorbei bewegt wird und sofort wieder beim Loslassen der Griffteile an dem Rastrücksprung vorbeiläuft, ohne in diesen einzurasten. In all these instruments, the problem is that when you close the handle parts the handles must be taken not too far closer to each other, otherwise the latch is moved to the engagement recess over and immediately passes again when you release the handle parts on the locking recess without these lock. Mit anderen Worten darf man die Griffteile nicht so weit einander annähern, daß bereits beim ersten Annähern wieder eine Lösung der Umlaufsperre eintritt, ohne daß diese vorher überhaupt in den Rastrücksprung eingerastet ist. In other words, we must handle the parts not so much closer to each other, that already the first approach reenters a solution of circulation check, without this forecast is ever locked into the engagement recess. Der Operateur muß daher beim Schließen der Griffteile sehr vorsichtig vorgehen, um tatsächlich die Einrastung zu erreichen und nicht versehentlich die Griffteile bis zur Löseposition von Raste und Rastrücksprung zu bewegen. The surgeon must therefore be very careful when closing the handle parts to actually reach the engaging and not accidentally move the handle parts up to the release position of jumper and the engagement recess.
  • [0004] [0004]
    Es ist Aufgabe der Erfindung, ein gattungsgemäßes Instrument so zu verbessern, daß beim Schließen der Griffteile in jedem Falle ein Einrasten der Raste in den Rastrücksprung erfolgt, auch wenn die Griffteile kräftig und über die Rastposition hinausgehend gegeneinander bewegt werden. It is an object of the invention to improve a generic instrument such that upon closure of the handle parts in each case takes place a snapping of the catch in the latching recess, even if the handle members are moved vigorously and over the latching position out continuously against one another.
  • [0005] [0005]
    Die Aufgabe wird bei einem chirurgischen Instrument der eingangs beschriebenen Art erfindungsgemäß dadurch gelöst, daß an dem ersten Griffteil eine erste Steuerkurve angeordnet ist, die beim Schließen der Griffteile gegen einen die Schließbewegung begrenzenden Anschlag die Raste in eine Einraststellung bringt, aus der sie beim Öffnen der Griffteile zwangsläufig in den Rastrücksprung eintritt, daß der Rastrücksprung eine zweite Steuerkurve trägt, die die Raste beim Eintauchen in den Rastrücksprung aus einer der ersten Steuerkurve gegenüberliegenden Eintrittsposition in eine einer dritten Steuerkurve am zweiten Griffteil gegenüberliegende Austrittsposition bewegt, und daß die dritte Steuerkurve die Raste beim erneuten Schließen der Griffteile aus der Schließstellung heraus in eine Ausraststellung bringt, aus der sie beim Öffnen der Griffteile zwangsläufig am Rastrücksprung vorbei bewegt wird. The object is solved in a surgical instrument of the type described at the outset according to the invention characterized in that a first cam is arranged on the first handle member which brings the notch upon closing of the handle members against a closing movement limiting stop in an engagement position from which it when opening handle parts inevitably enters the engagement recess, that the locking recess carries a second cam, the detent when immersed in the engagement recess from one of the first cam opposite entry position into a third cam on the second handle portion moves opposite exit position, and that the third cam the detent when from which it is inevitably moved when opening of the handle members past the engagement recess renewed closing of the handle members from the closed position into a disengaged position brings.
  • [0006] [0006]
    Es wird also eine Zwangsführung der Raste dergestalt vorgenommen, daß beim Schließen der Griffteile diese bis auf einen Anschlag geschlossen werden und daß dabei die Raste durch die erste Steuerkurve in eine Position bewegt wird, aus der sie beim Öffnen der Griffteile zwangsläufig in den Rastrücksprung eintreten muß. There is thus a positive guide of the latch such made that they are on closing of the handle members to a stop closed, and in that case the catch is moved by the first cam in a position from which it must necessarily enter the engagement recess when opening of the handle members , Im Rastrücksprung selbst wird die Raste durch die Steuerkurve der Raste so weit bewegt, daß bei einem erneuten Schließen der Griffteile die Raste nicht wieder zurück in die erste Steuerkurve gelangt, sondern jetzt in eine dritte, neben der ersten Steuerkurve angeordnete Steuerkurve, welche die Raste beim anschließenden Öffnen der Griffteile seitlich an dem Rastrücksprung vorbeiführt. In the engagement recess even the notch is moved so far by the cam of the detent, the detent does not come with a renewed closing of the handle members back to the first control curve, but now in a third, arranged next to the first cam control cam, which the detent when subsequent opening of the handle parts passes on the side of the engagement recess. Der Benutzer kann also beim Schließen der Griffteile diese bis auf einen Anschlag einander annähern und ist sicher, daß beim anschliessenden Loslassen der Griffteile die Raste in den Rastrücksprung eintritt und dadurch die Griffteile in der Schließstellung verriegelt. The user can therefore upon closing of the grip parts these to a stop close to each other and it is certain that during the subsequent release of the handle portions enters the notch in the engagement recess, thereby locking the handle sections in the closed position. Erst bei einem erneuten Zusammendrücken der Griffteile wird diese Verriegelung gelöst, besondere Sorgfalt muß der Benutzer dabei nicht auf die Schließbewegung richten, da diese in jedem Fall bis zu dem Anschlag durchgeführt wird. Only after a renewed pressing the grip Share this lock is released, special care the user has not paid to the closing movement here, as this is carried out in each case up to the attack.
  • [0007] [0007]
    Eine solche Ausgestaltung läßt sich bei allen chirurgischen Instrumenten einsetzen, bei denen durch eine Schließbewegung von zwei Griffteilen ein Werkzeug bewegt werden soll, beispielsweise bei Klemmen, Scheren, Zangen, Pinzetten etc. Dabei ist es vorteilhaft, wenn die Griffteile über eine Überlastfeder auf die Werkzeuge wirken, so daß bei der vollständigen Schließbewegung der Griffteile gegen einen Anschlag die Werkzeuge gegebenenfalls einen geringeren Weg zurücklegen, falls sie durch zwischen den Werkzeugen liegende Teile an einer vollständigen Schließbewegung der Werkzeuge gehindert sind. Such a configuration can be used for all surgical instruments, in which a tool is to be moved by a closing movement of two handle parts, such as clamps, scissors, forceps, tweezers, etc. It is advantageous if the handle parts via an overload spring to the tools act, so that the tools optionally cover a shorter path in the complete closing movement of the handle members against a stop, if they are hindered by parts lying between the tools in a complete closing movement of the tools. Trotzdem kann der Benutzer die Griffteile bis zum vollständigen Schließen gegen ihren Anschlag bewegen. Nevertheless, the user can move the handles up to fully close against their attack.
  • [0008] [0008]
    Grundsätzlich wäre es möglich, daß die Raste durch eine bahnförmige Steuerkurve vollständig in ihrer Bewegung geführt wird, es ist aber gemäß einer bevorzugten Ausführungsform besonders vorteilhaft, wenn auf die Raste eine Feder wirkt, die die Raste bei Auslenkung nach beiden Seiten in eine Mittelstellung zurückbewegt. In principle it would be possible that the catch is guided through a web-shaped cam fully in their movements, but it is particularly advantageous according to a preferred embodiment, when a spring acts on the latch, which returns the latch when deflected to both sides in a middle position. Bei einer solchen Ausgestaltung genügt es, die Steuerkurve als einfache Kulisse auszubilden, die einseitig an der Raste anliegt und die Raste entgegen der Wirkung der Feder nach der einen oder der anderen Seite auslenkt. In such an embodiment, it is sufficient to form the control cam as a simple sliding abutting one side of the catch and the catch deflects against the action of the spring in one direction or the other.
  • [0009] [0009]
    Günstig ist es, wenn die Raste verschwenkbar an dem zweiten Griffteil gelagert ist. It is favorable when the catch is pivotally mounted on the second handle part.
  • [0010] [0010]
    Auch die Umkehrung dieses Prinzips ist möglich, die Raste kann feststehen und die Steuerkurve kann an den Griffteilen beweglich gelagert werden, so daß sich auch in diesem Falle die beschriebene Relativbewegung ergibt. The converse of this principle is possible, the catch may be fixed, and the control curve can be movably mounted on the handle parts so that the relative movement described yields also in this case. Insbesondere kann auch der Einsatz über eine Feder in einer Mittelstellung gehalten und gegen die Federkraft nach beiden Seiten auslenkbar sein. In particular, the use of a spring may be held in a center position and be deflected against the spring force to both sides.
  • [0011] [0011]
    Die Schließbewegung der Griffteile kann durch einen Anschlag begrenzt sein, der als separater Anschlag an den Griffteilen vorgesehen ist, bei einer besonders bevorzugten Ausführungsform wird jedoch der die Schließbewegung der Griffteile begrenzende Anschlag durch die erste und die dritte Steuerkurve einerseits und die Raste andererseits gebildet. The closing movement of the handle members may be limited by a stop which is provided as a separate abutment on the handle parts, however, the closing movement of the handle parts limiting stop by the first and third cam on the one hand and the notch on the other hand formed in a particularly preferred embodiment. Beim Schließen wird also die Raste gegen einen Tiefstpunkt der Steuerkurve gedrückt, und dadurch wird die Schließbewegung begrenzt, bei der Öffnung der Griffteile aus dieser Anschlagposition bewegt sich dann die Raste längs der Steuerkurve in eine Position, in der sie entweder in den Rastrücksprung eintritt oder aber in der dritten Steuerkurve am Rastrücksprung vorbeigeführt wird. When closing thus the latch is pressed against a lowest point of the cam, and thereby the closing movement is limited, at the opening of the handle members from this stop position, then the latch moves along the control cam in a position in which it enters into either the engagement recess or is passed in the third cam on the latching recess.
  • [0012] [0012]
    Es wäre aber natürlich auch möglich, den Anschlag einfach an den Griffteilen anzuordnen, so daß die Schließbewegung der Griffteile direkt begrenzt wird. It would of course also possible to arrange the stop just at the handles so that the closing movement of the handle parts is limited directly. Beispielsweise könnten an beiden Griffteilen entsprechende Anschlagflächen vorgesehen sein, die ein weiteres Zusammenführen der Griffteile begrenzen. For example, corresponding stop surfaces could be provided on both handle parts that limit a further merging of the handle parts.
  • [0013] [0013]
    Es ist vorteilhaft, wenn die erste und die dritte Steuerkurve durch die Seitenflächen eines Vorsprungs gebildet werden, der dem Rastrücksprung gegenüberliegt. It is advantageous if the first and third cam are formed by the side faces of a projection which is opposite to the engagement recess. Beispielsweise kann dieser Vorsprung keilförmig ausgebildet sein. For example, this projection may be wedge-shaped.
  • [0014] [0014]
    Der Rastrücksprung ist vorzugsweise zum ersten Griffteil hin offen und kann beispielsweise keilförmig ausgebildet sein. The engagement recess is preferably to the first handle portion open and may be formed, for example wedge-shaped.
  • [0015] [0015]
    Bei einer bevorzugten Ausführungsform ist weiterhin vorgesehen, daß an dem Rastrücksprung an seiner dem ersten Griffteil abgewandten Seite eine Aufgleitfläche für die Raste angeordnet ist, welche diese beim Schließen der Griffteile entgegen der Wirkung der Feder aus ihrer Mittelstellung heraus bewegt. In a preferred embodiment it is further provided that a sliding surface is disposed on the latch on the latching recess on its side remote from the first grip portion side, which moves this during the closing of the handle members against the action of the spring from its central position.
  • [0016] [0016]
    Weiterhin kann vorgesehen sein, daß an dem Rastrücksprung an seiner dem ersten Griffteil abgewandten Seite eine Aufgleitfläche für die Raste angeordnet ist, welche diese beim Öffnen der Griffteile entgegen der Wirkung der Feder aus ihrer Mittelstellung heraus bewegt. Furthermore, it can be provided that a sliding surface is disposed on the latch on the latching recess on its side remote from the first grip portion side, which moves them when opening of the handle members against the action of the spring from its central position. Die Bewegungsrichtung der Raste längs der Aufgleitflächen ist dabei beim Öffnen und Schließen entgegengesetzt und die durch die Feder definierte Mittelstellung ist so gewählt, daß die Raste beim Schließen der Griffteile aus der vollständig geöffneten Stellung auf die Aufgleitfläche trifft, die die Raste in die erste Steuerkurve führt. The direction of movement of the latch along the sliding surfaces is opposite the opening and closing and the center position defined by the spring is selected so that the latch meets the closing of the handle members from the fully open position of the slide-on surface, which guides the detent in the first cam ,
  • [0017] [0017]
    Die erste und die dritte Steuerkurve können gemeinsam einen W-förmigen Verlauf haben, dabei ist es günstig, wenn die erste und die dritte Steuerkurve an ihren tiefsten Stellen verrundet sind. The first and third cam together can have a W-shaped course, while it is advantageous if the first and third cam are rounded at their lowest points.
  • [0018] [0018]
    Es kann vorgesehen sein, daß die Raste die Form eines quer zur Schließrichtung der Griffteile verlaufenden Steges hat. It can be provided that the catch has the form of a transverse to the closing direction of the handle parts web. Dieser Steg kann vorzugsweise am freien Ende eines schwenkbar am zweiten Griffteil gelagerten Haltearmes angeordnet sein. This web may preferably be disposed at the free end of a pivotally mounted on the second handle part holding arm.
  • [0019] [0019]
    Weiterhin kann vorgesehen sein, daß der Rastrücksprung und gegebenenfalls die Aufgleitflächen Teil eines Quersteges sind, der quer zur Schließrichtung verlaufend am ersten Griffteil gehalten ist. Furthermore, it can be provided that the engagement recess and optionally the sliding surfaces are part of a transverse web, which is held transverse to the closing direction extending on the first handle portion.
  • [0020] [0020]
    Eine besonders günstige Konstruktion ergibt sich, wenn der Rastrücksprung und die erste und die dritte Steuerkurve an einem Einsatz angeordnet sind, der in das erste Griffteil eingesetzt ist. A particularly advantageous construction is obtained when the engagement recess and the first and third cam are arranged on an insert which is inserted into the first handle portion.
  • [0021] [0021]
    Die Griffteile können in beliebiger Weise gegeneinander bewegbar sein, besonders vorteilhaft ist es, wenn die Griffteile gegeneinander verschwenkbar sind. The handle parts can be moved towards one another in any desired manner, it is particularly advantageous when the handle parts are mutually pivotable.
  • [0022] [0022]
    Die nachfolgende Beschreibung bevorzugter Ausführungsformen der Erfindung dient im Zusammenhang mit der Zeichnung der näheren Erläuterung. The following description of preferred embodiments of the invention serves in conjunction with the drawings for a more detailed explanation. Es zeigen: Show it:
  • [0023] [0023]
    1 1 : eine Längsschnittansicht durch einen Handgriff mit zwei gegeneinander verschwenkbaren Griffteilen und einer Umlaufsperre bei vollständig geöffneten Griffteilen; A longitudinal sectional view through a handle having two mutually pivotable handle members and a circulation lock fully open handle portions;
  • [0024] [0024]
    2 2 : eine Detailansicht des Bereiches der Umlaufsperre beim ersten Teil der Schließbewegung; Is a detail view of the portion of the circulation barrier in the first part of the closing movement;
  • [0025] [0025]
    3 3 : eine Darstellung ähnlich A representation similar 2 2 beim Eintritt der Raste in eine erste Steuerkurve am ersten Griffteil; upon entry of the catch in a first cam on the first handle portion;
  • [0026] [0026]
    4 4 : eine Ansicht ähnlich A view similar to 2 2 beim Eintritt der Raste in den Rastrücksprung des ersten Griffteils; upon entry of the catch in the latching recess of the first handle portion;
  • [0027] [0027]
    5 5 : eine Ansicht ähnlich A view similar to 2 2 mit der Raste in der Verriegelungsstellung im Rastrücksprung; with the latch in the locking position in the engagement recess;
  • [0028] [0028]
    6 6 : eine Ansicht ähnlich A view similar to 2 2 beim Eintritt der Raste in die dritte Steuerkurve am ersten Griffteil; upon entry of the latch into the third cam on the first handle portion;
  • [0029] [0029]
    7 7 : eine Ansicht ähnlich A view similar to 2 2 beim Austritt der Raste aus dem Rastrücksprung am ersten Griffteil und at the exit of the detent from the latching recess on the first handle portion and
  • [0030] [0030]
    8 8th : eine Ansicht ähnlich A view similar to 2 2 bei der Öffnungsbewegung der Griffteile kurz vor Erreichen der vollständigen Öffnung. during the opening movement of the handle members shortly before reaching the full opening.
  • [0031] [0031]
    Das in der Zeichnung nur teilweise dargestellte Instrument The instrument is only partly shown in the drawing 1 1 kann beispielsweise ein Rohrschaftinstrument mit zwei Klemmwerkzeugen oder zwei Schneidwerkzeugen sein oder ein Nadelhalter, eine Zange oder ein ähnliches Instrument. a tubular shaft instrument with two clamping tools or two cutting tools can, for example, or a needle holder, a forceps or a similar instrument. In der Zeichnung ist von diesem Instrument In the drawing of this instrument 1 1 nur ein Handgriff only a handle 2 2 dargestellt, der ein feststehendes zweites Griffteil illustrated, a fixed second handle portion 3 3 und ein schwenkbar an diesem gelagertes erstes Griffteil and a pivotably mounted on this first grip part 4 4 umfaßt. includes.
  • [0032] [0032]
    Die beiden Griffteile werden über eine an beiden Griffteilen angreifende Biegefeder The two handle parts are an attacking on both handle parts bending spring 5 5 in eine Offenstellung verschwenkt, in der sie maximal voneinander entfernt sind. pivoted into an open position, in which they are at the maximum distance from one another. Mit dem zweiten Griffteil With the second handle portion 3 3 ist ein Außenrohr is an outer tube 6 6 fest verbunden, in dem eine Betätigungsstange fixedly connected, in which an actuating rod 7 7 verschiebbar aufgenommen ist. is slidably received. Diese wird unter Zwischenschaltung einer Überlastschutzfeder This is the interposition of an overload protection spring 8 8th über einen mit dem ersten Griffteil a first to the grip part 4 4 verschwenkbar verbundenen Betätigungshebel pivotally connected to actuating lever 9 9 beim Öffnen und Schließen der Griffteile zurück – und vorgeschoben und kann dann am anderen Ende ein Werkzeug betätigen. during opening and closing of the handle members back - and is advanced and may then operate a tool on the other end.
  • [0033] [0033]
    Am zweiten Griffteil ist in einer Ausnehmung On the second handle portion is in a recess 10 10 um eine parallel zur Schwenkachse des ersten Griffteiles about an axis parallel to the pivot axis of the first handle portion 1 1 verlaufende Schwenkachse ein Rastkörper a pivot axis extending latching body 11 11 verschwenkbar gelagert, der mit einem Haltearm pivotably mounted, with a holding arm 12 12 aus der Ausnehmung from the recess 10 10 hervorsteht und dort mit dem keilförmig zulaufenden Ende des Haltearms projecting and provided with the wedge-like tapering end of the support arm 12 12 auf das erste Griffteil to the first handle portion 1 1 weist. has. Der Rastkörper The latching body 11 11 wird durch eine beidseitig abgestützte Schraubenfeder is a bilaterally supported coil spring 13 13 in einer Mittellage gehalten und kann nach beiden Seiten unter Kompression der Schraubenfeder held in a central position and, after both sides under compression of the coil spring 13 13 verschwenkt werden, die Schraubenfeder are pivoted, the coil spring 13 13 führt den Rastkörper guides the latching body 11 11 in eine neutrale Mittellage zurück, wenn keine anderen Drehmomente auf ihn wirken. back to a neutral central position when acting no other torques on him.
  • [0034] [0034]
    An seinem freien Ende trägt der Haltearm At its free end of the arm bears 12 12 einen parallel zur Schwenkachse des Rastkörpers a parallel to the pivot axis of the latching body 11 11 verlaufenden Steg extending web 14 14 von etwa dreieckförmigem Querschnitt. of approximately triangular cross-section. An seiner dem ersten Griffteil At its first handle portion 4 4 zugewandten Unterseite wird der Steg underside facing the web is 14 14 durch zwei keilförmig zum zweiten Griffteil by two wedge-shaped to the second handle portion 3 3 hin auseinanderlaufende Anlageflächen out diverging contact surfaces 15 15 , . 16 16 begrenzt, an seiner Oberseite durch eine schräg ansteigende Rastfläche limited on its top by an upwardly inclined latch surface 17 17 . ,
  • [0035] [0035]
    Dem Rastkörper The catch body 11 11 gegenüberliegend ist in eine Ausnehmung is opposite a recess in 18 18 des ersten Griffteils the first handle portion 4 4 ein Einsatz an insert 19 19 eingesetzt, in den eine im Querschnitt etwa W-förmige Vertiefung used, in which a cross-sectionally approximately W-shaped groove 20 20 eingearbeitet ist. is incorporated. Diese Vertiefung this depression 20 20 ist an den tiefsten Stellen des W-förmigen Querschnittes verrundet, weist also dort einen bogenförmigen Boden auf, und diese beiden bogenförmigen Abschnitte werden in der Mitte von einem etwa keilförmig nach oben abstehenden Vorsprung is rounded at the lowest points of the W-shaped cross section, so there has an arcuate bottom, and these two arcuate portions are at the center of an approximately wedge-shaped upwardly extending projection 21 21 voneinander getrennt. separated. Auf seiner in der Zeichnung linken, der Schwenklagerung des ersten Griffteils On its left in the drawing, the pivotal mounting of the first handle portion 4 4 benachbarten Seite wird der Vorsprung adjacent side, the projection 21 21 durch eine Seitenfläche by a side surface 22 22 begrenzt, die eine erste Steuerkurve ausbildet, auf der rechten Seite durch eine Seitenfläche limited, which forms a first cam, on the right side by a side surface 23 23 , die eine dritte Steuerkurve ausbildet. Which forms a third control curve. Oberhalb des Vorsprunges Above the projection 21 21 befindet sich ein ebenfalls Teil des Einsatzes There is a also part of the insert 19 19 bildender Quersteg forming transverse web 24 24 , der parallel zum Steg That parallel to the web 14 14 verläuft und der an seiner Unterseite dem Vorsprung extends and on its underside the projection 21 21 gegenüberliegend einen Rastrücksprung opposite a latching recess 25 25 trägt, der zum ersten Griffteil carries the first handle portion 4 4 hin offen ist und eine schräg ansteigende Anlagefläche is open and an upwardly inclined contact surface 26 26 und eine relativ steil zum ersten Griffteil and a relatively steeply to the first handle portion 4 4 hin abfallende Anlagefläche sloping down towards support surface 27 27 aufweist, die gemeinsam eine zweite Steuerkurve ausbilden. which together form a second control curve.
  • [0036] [0036]
    An seinen beiden Außenseiten verläuft der Quersteg At its two outer sides of the transverse web extends 24 24 in Form von zwei sich zum zweiten Griffteil in the form of two for the second handle portion 3 3 hin keilförmig annähernden ebenen Anlageflächen towards approximate wedge-shaped flat contact surfaces 28 28 und 29 schräg nach oben, wobei die Spitze des Quersteges and 29 obliquely upward, the tip of the transverse web 24 24 von der Schwenkachse des ersten Griffteiles from the pivot axis of the first handle portion 4 4 einen größeren Abstand hat als der Rastrücksprung a greater distance than the locking recess 25 25 , so daß sich der Quersteg So that the transverse web 24 24 ausgehend von der Mitte der W-förmigen Vertiefung starting from the center of the W-shaped groove 20 20 im wesentlichen zu deren rechter Seite hin erstreckt. extends substantially toward the right side thereof.
  • [0037] [0037]
    Wenn die beiden Griffteile When the two handle parts 3 3 und and 4 4 in der vollständig geöffneten Stellung stehen, ist der Steg are in the fully open position, the web 14 14 im Abstand von dem Einsatz at a distance from the insert 19 19 angeordnet, der Rastkörper arranged, the locking body 11 11 steht in seiner Mittelstellung. is in its central position. Diese Stellung ist in This position is in 1 1 dargestellt. shown.
  • [0038] [0038]
    Beim Schließen der beiden Griffteile When closing the two handle parts 3 3 und and 4 4 trifft der Steg hits the web 14 14 auf die der Schwenkachse des ersten Griffteiles to the pivot axis of the first handle portion 4 4 zugewandte Anlagefläche facing contact surface 28 28 des Quersteges the transverse web 24 24 auf und wird beim weiteren Schließen an dieser Anlagefläche is on and the further closing of this contact surface 28 28 entlang geführt, dabei wird der Rastkörper guided along, as well, the latching body 11 11 entgegen der Wirkung der Schraubenfeder against the action of the coil spring 13 13 im Uhrzeigersinn verschwenkt, diese Phase der Bewegung ist in pivoted clockwise, this phase of the movement is in 2 2 dargestellt. shown.
  • [0039] [0039]
    Die Anlagefläche The contact surface 28 28 ist so angeordnet, daß bei der weiteren Schließbewegung der Steg is arranged so that in the further closing movement of the web 14 14 in den linken Abschnitt der W-förmigen Vertiefung in the left portion of the W-shaped groove 20 20 eintaucht und dort gegen den Boden der Vertiefung dipping and there against the bottom of the recess 20 20 stößt, damit wird die Schließbewegung der beiden Griffteile abuts, thus the closing movement of the two handle parts 3 3 und and 4 4 begrenzt. limited. Diese Stellung ist in This position is in 3 3 dargestellt. shown.
  • [0040] [0040]
    Öffnet man ausgehend von dieser Stellung die Griffteile you open from this position, the handle parts 3 3 , . 4 4 , so gleitet der Steg So slides the web 14 14 unter der Wirkung der Schraubenfeder under the action of the coil spring 13 13 an der linken Seitenfläche on the left side surface 22 22 des Vorsprunges the projection 21 21 entlang, diese Seitenfläche along this side surface 22 22 wirkt somit als erste Steuerkurve, die eine Verschwenkung des Rastkörpers thus acts as a first cam that a pivoting of the detent body 11 11 entgegen dem Uhrzeigersinn ermöglicht, so daß der Steg counterclockwise possible so that the web 14 14 unterhalb der Anlagefläche below the bearing surface 26 26 des Rastrücksprunges the locking rear jump 25 25 positioniert wird, wie dies in is positioned as in 5 5 dargestellt ist. is shown. Beim weiteren Öffnen tritt der Steg Upon further opening of the web occurs 14 14 somit in den Rastrücksprung Thus, in the engagement recess 25 25 ein und gleitet in diesem unter der verschwenkenden Wirkung der Schraubenfeder and slides in this pivoting under the action of the coil spring 13 13 entlang, bis die Anlagefläche along, until the abutment surface 16 16 des Steges the web 14 14 an der Anlagefläche on the contact surface 27 27 des Rastrücksprunges the locking rear jump 25 25 anschlägt. strikes. Dadurch wird der Steg Thereby, the web 14 14 , der eine Raste ausbildet, im Rastrücksprung Which forms a detent in engagement recess 25 25 festgelegt und verhindert eine weitere Öffnungsbewegung der beiden Griffteile set and prevents further opening movement of the two handle parts 3 3 , . 4 4 ( ( 5 5 ). ).
  • [0041] [0041]
    Drückt man die beiden Griffteile Pressing the two handle parts 3 3 und and 4 4 erneut gegeneinander, so tritt der Steg again against each other, so the web occurs 14 14 nunmehr in die rechte Hälfte der W-förmigen Vertiefung now in the right half of the W-shaped groove 20 20 ein, da der Rastkörper one because the latching body 11 11 durch den Eintritt des Steges by the entry of the web 14 14 in den Rastrücksprung in the engagement recess 25 25 unter der Wirkung der Schraubenfeder under the action of the coil spring 13 13 geringfügig nach rechts verschoben worden ist, und hier wird der Steg has been shifted slightly to the right, and here is the web 14 14 an der Seitenfläche on the side surface 23 23 des Vorsprunges the projection 21 21 entlang so geführt, daß der Rastkörper guided along so that the latching body 11 11 weiter entgegen der Uhrzeigerrichtung verschwenkt wird, und zwar bis zu einer Position, in der der Steg is further pivoted in the counterclockwise direction, namely up to a position in which the web 14 14 nicht mehr dem Rastrücksprung no longer the engagement recess 25 25 gegenüberliegt, sondern der rechten Anlagefläche opposite, but the right-hand abutment surface 29 29 des Quersteges the transverse web 24 24 . , Beim Öffnen der beiden Griffteile When opening the two handle parts 3 3 , . 4 4 gleitet daher der Steg Therefore, sliding of the web 14 14 an dieser Anlagefläche this contact surface 29 29 entlang und wird dadurch entgegen dem Uhrzeigersinn verschwenkt, diese Verschwenkung führt über die neutrale Mittelstellung hinaus, so daß der Steg along and is thereby pivoted in the counterclockwise direction, this pivoting leads beyond the neutral central position, so that the web 14 14 bei dieser Verschwenkbewegung durch die Schraubenfeder in this pivoting movement by the coil spring 13 13 gegen die Anlagefläche against the contact surface 29 29 angedrückt wird. is pressed. Dieser Bewegungsablauf ist in den This movement is in the 6 6 bis to 8 8th dargestellt. shown.
  • [0042] [0042]
    Sobald der Steg Once the web 14 14 am oberen Ende der Anlagefläche at the upper end of the abutment surface 29 29 angelangt ist, verschwenkt der Rastkörper has arrived, pivots the latching body 11 11 unter der Wirkung der Schraubenfeder under the action of the coil spring 13 13 wieder in die neutrale Mittelstellung, so daß bei erneutem Schließen der Griffteile back to the neutral position so that when a new closing of the handle members 3 3 , . 4 4 der Bewegungsablauf beginnt, wie dies oben erörtert worden ist. the movement begins, as has been discussed above.
  • [0043] [0043]
    Der Benutzer kann also einfach die beiden Griffteile so the user can easily handle the two parts 3 3 , . 4 4 schließen, bis ein Anschlag erreicht ist, und dann kurz loslassen, dadurch erfolgt eine Verriegelung in der Schließstellung, durch erneutes Zusammendrücken kann diese Verriegelung wieder gelöst werden. close until a stop is reached, and then briefly release, characterized effected a locking in the closed position, by re-compressing this locking can be released again. Dabei muß nicht darauf geachtet werden, daß bei der Schließbewegung die Schließposition nicht überfahren werden darf, dies ist bei dieser Konstruktion nicht möglich. It must not be taken to ensure that the closed position can not be overrun in the closing movement, this is not possible with this construction.

Claims (17)

  1. Chirurgisches Instrument mit zwei gegeneinander bewegbaren Griffteilen und mit einer Umlaufsperre zur gegenseitigen Fixierung der Griffteile in einer Schließstellung und zur Lösung der Fixierung beim weiteren Annähern der Griffteile über die Schließstellung hinaus in eine Öffnungsstellung, die an einem ersten Griffteil einen Rastrücksprung und an einem zweiten Griffteil eine in diesen eingreifende und dadurch die Griffteile in der Schließstellung fixierende Raste umfaßt, die beim Schließen der Griffteile an einer Seite des Rastrücksprunges vorbeibewegt wird und beim Öffnen an der anderen, dadurch gekennzeichnet , daß an dem ersten Griffteil ( A surgical instrument comprising two mutually movable grip parts, and with a circulation check for mutual fixing of the handle parts in a closed position and to the solution of the fixing during the further approach of the handle parts over the closing position into an opening position, the one on a first handle portion comprises a locking recess and a second handle portion in these engaging and thus comprises the handle parts in the closed position fixing notch, which is moved past one side of the latch return jump during closing of the handle members and opening at the other, characterized in that (on the first handle portion 4 4 ) eine erste Steuerkurve ( ) A first cam ( 22 22 ) angeordnet ist, die beim Schließen der Griffteile ( is arranged), which (during closing of the handle members 3 3 , . 4 4 ) gegen einen die Schließbewegung begrenzenden Anschlag die Raste ( ) Against a closing movement of the stop limiting the detent ( 14 14 ) in eine Einraststellung bringt, in der sie beim Öffnen der Griffteile ( ) Into an engagement position, in which they (when opening of the handle members 3 3 , . 4 4 ) zwangsläufig in den Rastrücksprung ( ) Inevitably (in the engagement recess 25 25 ) eintritt, daß der Rastrücksprung ( ), Occurs that the latching recess ( 25 25 ) eine zweite Steuerkurve ( ) A second control curve ( 26 26 , . 27 27 ) trägt, die die Raste ( ) Wears, the (the catch 14 14 ) beim Eintauchen in den Rastrücksprung ( ) (When immersed in the engagement recess 25 25 ) aus einer der ersten Steuerkurve ( ) (From one of the first cam 22 22 ) gegenüberliegenden Eintrittsposition in eine einer dritten Steuerkurve ( ) Opposite entry position (in a third control curve 23 23 ) am ersten Griffteil ( ) (On the first handle portion 4 4 ) gegenüberliegende Austrittsposition bewegt, und daß die dritte Steuerkurve ( ) Opposite the exit position is moved, and said third cam ( 23 23 ) die Raste ( ) The detent ( 14 14 ) beim erneuten Schließen der Griffteile ( ) (When re-closing of the handle members 3 3 , . 4 4 ) aus der Schließstellung heraus in eine Ausraststellung bringt, aus der sie beim Öffnen der Griffteile ( ) Brings out of the closed position into a disengaged position from which it (when opening of the handle members 3 3 , . 4 4 ) zwangsläufig am Rastrücksprung ( ) Inevitably (the engagement recess 25 25 ) vorbeibewegt wird. ) Is moved.
  2. Instrument nach Anspruch 1, dadurch gekennzeichnet, daß auf die Raste ( Instrument according to claim 1, characterized in that (on the catch 14 14 ) eine Feder ( ) a feather ( 13 13 ) wirkt, die die Raste ( ) Acts that (the catch 14 14 ) bei Auslenkung nach beiden Seiten in eine Mittelstellung zurückbewegt. ) Moved back when deflected to both sides in a middle position.
  3. Instrument nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Raste ( Instrument according to one of claims 1 or 2, characterized in that the detent ( 14 14 ) verschwenkbar an dem zweiten Griffteil ( ) Pivotably (on the second handle part 3 3 ) gelagert ist. is mounted).
  4. Instrument nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß der die Schließbewegung der Griffteile ( Instrument according to any one of the preceding claims, characterized in that the (the closing movement of the handle members 3 3 , . 4 4 ) begrenzende Anschlag durch die erste und die dritte Steuerkurve ( ) Limiting stop by the first and the third cam ( 22 22 , . 23 23 ) einerseits und die Raste ( ) On the one hand and the catch ( 14 14 ) andererseits gebildet wird. ) Is the other hand.
  5. Instrument nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die erste und die dritte Steuerkurve ( Instrument according to any one of the preceding claims, characterized in that the first and the third cam ( 22 22 , . 23 23 ) durch die Seitenflächen eines Vorsprungs ( ) (By the side surfaces of a protrusion 21 21 ) gebildet werden, der dem Rastrücksprung ( ) Are formed of (the engagement recess 25 25 ) gegenüberliegt. ) Opposite.
  6. Instrument nach Anspruch 5, dadurch gekennzeichnet, daß der Vorsprung ( Instrument according to claim 5, characterized in that the projection ( 21 21 ) keilförmig ausgebildet ist. ) Is wedge-shaped.
  7. Instrument nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß der Rastrücksprung ( Instrument according to any one of the preceding claims, characterized in that the latching recess ( 25 25 ) zum ersten Griffteil ( ) (For the first handle portion 4 4 ) hin offen ist. ) Is open.
  8. Instrument nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß der Rastrücksprung ( Instrument according to any one of the preceding claims, characterized in that the latching recess ( 25 25 ) keilförmig ausgebildet ist. ) Is wedge-shaped.
  9. Instrument nach einem der Ansprüche 2 bis 8, dadurch gekennzeichnet, daß an dem Rastrücksprung ( Instrument according to one of claims 2 to 8, characterized in that (at the engagement recess 25 25 ) an seiner dem ersten Griffteil ( ) (At its first handle part 4 4 ) zugewandten Seite eine Aufgleitfläche ( ) Side facing a slide-on surface ( 28 28 ) für die Raste ( ) (For the screening 14 14 ) angeordnet ist, welche diese beim Schließen der Griffteile ( is disposed) which this (upon closing of the handle members 3 3 , . 4 4 ) entgegen der Wirkung der Feder ( ) Against the action of the spring ( 13 13 ) aus ihrer Mittelstellung heraus bewegt. ) Moved out of its central position.
  10. Instrument nach einem der Ansprüche 2 bis 9, dadurch gekennzeichnet, daß an dem Rastrücksprung ( Instrument according to one of claims 2 to 9, characterized in that (at the engagement recess 25 25 ) an seiner dem ersten Griffteil ( ) (At its first handle part 4 4 ) zugewandten Seite eine Aufgleitfläche ( ) Side facing a slide-on surface ( 29 29 ) für die Raste ( ) (For the screening 14 14 ) angeordnet ist, welche diese beim Öffnen der Griffteile ( is disposed) which this (when opening of the handle members 3 3 , . 4 4 ) entgegen der Wirkung der Feder aus ihrer Mittelstellung heraus bewegt. ) Against the action of the spring moves from its center position.
  11. Instrument nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die erste und die dritte Steuerkurve ( Instrument according to any one of the preceding claims, characterized in that the first and the third cam ( 22 22 , . 23 23 ) gemeinsam einen W-förmigen Verlauf haben. ) Have a W-shaped profile together.
  12. Instrument nach Anspruch 11, dadurch gekennzeichnet, daß die erste und die dritte Steuerkurve ( Instrument according to claim 11, characterized in that the first and the third cam ( 22 22 , . 23 23 ) an ihren tiefsten Stellen verrundet sind. ) Are rounded at their lowest points.
  13. Instrument nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Raste ( Instrument according to any one of the preceding claims, characterized in that the detent ( 14 14 ) die Form eines quer zur Schließrichtung der Griffteile ( ) Has the shape of a transversely to the closing direction of the grip parts ( 3 3 , . 4 4 ) verlaufenden Steges hat. has) extending web.
  14. Instrument nach Anspruch 13, dadurch gekennzeichnet, daß der Steg am freien Ende eines schwenkbar am zweiten Griffteil ( Instrument according to claim 13, characterized in that the web of a pivotally (at the free end of the second handle portion 3 3 ) gelagerten Haltearmes ( Retaining arm mounted) ( 12 12 ) angeordnet ist. ) Is arranged.
  15. Instrument nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß der Rastrücksprung ( Instrument according to any one of the preceding claims, characterized in that the latching recess ( 25 25 ) und gegebenenfalls die Aufgleitflächen ( ) And optionally the sliding surfaces ( 26 26 , . 27 27 ) Teil eines Quersteges ( ) Part of a transverse web ( 24 24 ) sind, der quer zur Schließrichtung verlaufend am ersten Griffteil ( ) Are the extending (transversely to the closing direction on the first handle portion 4 4 ) gehalten ist. ) Is held.
  16. Instrument nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß der Rastrücksprung ( Instrument according to any one of the preceding claims, characterized in that the latching recess ( 25 25 ) und die erste und die dritte Steuerkurve ( ) And the first and the third cam ( 22 22 , . 23 23 ) an einem Einsatz ( ) (On an insert 19 19 ) angeordnet sind, der in das erste Griffteil ( are arranged), which (in the first grip part 4 4 ) eingesetzt ist. ) Is inserted.
  17. Instrument nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Griffteile ( Instrument according to any one of the preceding claims, characterized in that the handle parts ( 3 3 , . 4 4 ) gegeneinander verschwenkbar sind. ) Are relative to each other.
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