DE3709067A1 - Medical, especially surgical, instrument - Google Patents

Medical, especially surgical, instrument

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Publication number
DE3709067A1
DE3709067A1 DE19873709067 DE3709067A DE3709067A1 DE 3709067 A1 DE3709067 A1 DE 3709067A1 DE 19873709067 DE19873709067 DE 19873709067 DE 3709067 A DE3709067 A DE 3709067A DE 3709067 A1 DE3709067 A1 DE 3709067A1
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DE
Germany
Prior art keywords
characterized
instrument
instrument according
coupling part
preceding
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.)
Withdrawn
Application number
DE19873709067
Other languages
German (de)
Inventor
Ewald Hensler
Original Assignee
Ewald Hensler
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
Application filed by Ewald Hensler filed Critical Ewald Hensler
Priority to DE19873709067 priority Critical patent/DE3709067A1/en
Publication of DE3709067A1 publication Critical patent/DE3709067A1/en
Application status is Withdrawn legal-status Critical

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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
    • A61B17/2909Handles
    • 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
    • A61B17/2909Handles
    • A61B2017/2912Handles transmission of forces to actuating rod or piston
    • A61B2017/2919Handles transmission of forces to actuating rod or piston details of linkages or pivot points
    • A61B2017/292Handles transmission of forces to actuating rod or piston details of linkages or pivot points connection of actuating rod to handle, e.g. ball end in recess
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/03Automatic limiting or abutting means, e.g. for safety
    • A61B2090/033Abutting means, stops, e.g. abutting on tissue or skin
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/03Automatic limiting or abutting means, e.g. for safety

Abstract

In a surgical instrument, a reliable overload protection is provided by a coupling (6, 8) which disengages automatically when a predetermined maximum load is exceeded, between the movable actuation handle (2) of the instrument and an actuation member (5) of the cutting tool or the like (Fig. 1). <IMAGE>

Description

Die Erfindung betrifft ein Instrument gemäß dem Oberbegriff des Anspruchs 1. The invention relates to an instrument according to the preamble of claim 1.

Derartige Instrumente mit zwei etwa zur Betätigung eines Schneid- oder Stanzwerkzeugs od. dgl. relativ zueinander bewegbaren Griffteilen werden in der Praxis häufig erheb lichen Belastungen ausgesetzt. Such instruments with two approximately od. For actuating a cutting or punching tool like. Relatively movable handle portions are exposed in practice often fixed union stresses. Wenn zB ein mikrochirurgisches Instrument zur Überwindung eines entsprechenden Hindernisses am Werkzeug mit übermäßiger Kraft betätigt wird, können Beschädigungen des Instrumentes und damit uU eine gefähr liche Störung der Operation und/oder Verletzungen die Folge sein. For example, when operating a microsurgical instrument for overcoming an obstacle corresponding to the tool with excessive force, damaging the instrument and thus can be the result of a possibly dangerous Liche disruption of operation and / or injury.

Zum Auffangen übermäßiger Betätigungskräfte war es bisher lediglich bekannt, durch innere Anschläge die mögliche Bewegung des Betätigungselementes wie beispielsweise einer Druck- oder Zugstange zu begrenzen. To collect excessive actuating forces heretofore only known to limit the possible movement of the actuating element such as a pressure or tension rod from internal attacks. Dadurch kann zwar eine Beschädigung von Maulteilen, Schneiden usw. infolge unzulässig großen Bewegungsweges vermieden werden, nicht aber eine Beschädigung aufgrund des Versuches, ein Gewebeteil mit einer Kraft zu zerschneiden, der das Instrument nicht gewachsen ist. This will prevent damage of jaws, cutting, etc. due to unacceptably large path of movement can indeed be avoided, but not to cut damage due to the experiment, a piece of fabric with a force of the instrument has not grown.

Der Erfindung liegt die Aufgabe zugrunde, ein Instrument zu schaffen, das nur bis zu einer bei der Herstellung des Instrumentes genau definierbaren zulässigen Grenze belastet werden kann, so daß Beschädigungen durch übermässige Kräfte ausgeschlossen werden. The invention has for its object to provide an instrument that can be only up to a precisely defined in the manufacture of the instrument allowable limit loaded so that damage is precluded by excessive forces.

Diese Aufgabe wird das im Anspruch 1 gekennzeichnete Instrument gelöst. This object, the instrument characterized in claim 1 is dissolved.

Durch die Erfindung wird das oben erwähnte Problem vermieden und ein sehr zuverlässiger Überlastungsschutz auf konstruktiv einfach und mit wenig Aufwand realisierbare Weise ermöglicht. By the invention the above mentioned problem is avoided and a very reliable overload protection allows a structurally viable and with little effort simply way.

An dem in der Zeichnung dargestellten Ausführungsbeispiel wird die Erfindung näher erläutert. On the example shown in the drawings embodiment, the invention is explained in detail. Es zeigen: Show it:

Fig. 1 eine teilweise vereinfachte Darstellung des Betätigungsteils eines chirurgischen Instrumentes mit den üblichen Scherengriffen; Figure 1 is a partly simplified view of the operating part of a surgical instrument with the usual scissors handles. und and

Fig. 2 eine vergrößerte Detailansicht der Kupplungs konstruktion des Instruments nach Fig. 1. Fig. 2 is an enlarged detail view of the coupling construction of the instrument of FIG. 1.

An dem stationären Griffstück 1 ist fest in an sich bekannter Weise ein im wesentlichen rohrförmiger Schaft 1 ′ angebracht, in dessen axialer Bohrung ein am Ende einer Betätigungsstange 5 für das zu betätigende Werkzeug befestigtes kolbenartiges Kupplungsteil 6 längs der Schaftachse verschiebbar ist. To the stationary handle 1 is fixed in known manner a substantially tubular shaft 1 'mounted in the axial bore at the end of an operating rod 5 attached to the operable tool piston-like coupling part 6 of the shaft axis is longitudinally displaceable. Das Kupplungsteil 6 kann durch zweckmäßige Formgebung gegen Verdrehung um die Schaftachse gesichert sein, und sein Verschiebungsweg ist einerseits durch das Bohrungsende des Schaftes und in der anderen Richtung durch eine (nicht dargestellte) Anschlagkonstruktion begrenzt. The coupling member 6 may be secured by appropriate shaping against rotation about the shaft axis, and its displacement path is limited on one side by the bore end of the shaft and in the other direction by a (not shown) stop structure.

Zum Betätigen des in üblicher Weise am entfernten Ende der Betätigungsstange 5 angeordneten Werkzeugs (nicht dargestellt) dient der bewegliche Betätigungsgriff 2 , dessen in Fig. 1 oberes Ende beispielsweise in einen sich nach unten öffnenden Schlitz im Griffstück 1 bzw. Schaft 1 ′ eingesteckt und mit Hilfe einer Lagerschraube 7 relativ zum Griffstück 1 drehbar an diesem gelagert sein kann. To actuate the arranged in a conventional manner at the distal end of the operating rod 5 tool (not shown) is used for the movable operating handle 2, which is inserted in Fig. 1 the upper end, for example, in a downwardly opening slot in the handle 1 and the shaft 1 'and with by means of a bearing screw 7 may be rotatably mounted relative to the handle 1 thereto. Die Bewegung des Betätigungs griffes 2 wird auf die Betätigungsstange 5 durch eine formschlüssige Kupplung übertragen, die außer dem erwähnten Kupplungsteil 6 ein an dem Betätigungsgriff 2 angeordnetes zweites Kupplungsteil 8 enthält. The movement of the actuation handle 2 is transmitted to the operating rod 5 by a positive coupling, which contains, besides the above-mentioned coupling part 6, an operating handle disposed on the second coupling part 2. 8 Das Kupplungsteil 8 besteht aus einem flachen länglichen Körper, der in seiner Längsrichtung verschiebbar in einem entsprechend bemessenen Führungsschlitz 12 sitzt, welcher in die dem Kupplungsteil 6 zugewandte Stirnfläche des Betätigungsgriffes 2 eingefräst ist. The coupling part 8 consists of a flat elongated body sits in its longitudinal direction in a correspondingly dimensioned guide slot 12 which is milled into the coupling part 6 facing end face of the actuating handle. 2 Mit einem sich in der Verschiebungsrichtung erstreckenden Langloch 13 sitzt das verschiebbare Kupplungsteil 8 auf der erwähnten, den Betätigungsgriff 2 mit dem Griffstück 1 verbindenden Lagerschraube 7 . With a extending in the displacement direction longitudinal hole 13 the slidable coupling part 8 is seated on the mentioned, the operating handle 2 with the handle 1 connects bearing screw. 7 Die Größe des Langloches 13 ist so bemessen, daß der Bewegungskurve des verschiebbaren Kupplungsteils 8 während der Drehbewegung des Betätigungs griffes 2 beim Betätigen des Instrumentes Rechnung getragen wird. The size of the elongated hole 13 is dimensioned so that the movement trajectory of the displaceable coupling part 8 during the rotational movement of the actuating handle 2 is supported upon actuation of the instrument into account. Aus dem Führungsschlitz ragt das Kupplungsteil 8 mit einem Vorsprung 10 ( Fig. 2) mit konvexer, zB halbkreis förmig gekrümmter Stirnfläche hervor. Of the guide slot, the coupling member 8 projects with a projection 10 (Fig. 2) with a convex, for example semicircular-shaped curved face produced. Der Vorsprung greift normalerweise in eine entsprechend dem Ziel der Erfindung bemessene, bei dem dargestellten Beispiel ebenfalls halb kreisförmig gekrümmte Ausnehmung 11 in der dem Kupplungs teil 8 zugewandten Unterseite des Kupplungsteils 6 ein. The projection normally engages in a corresponding to the object of the invention dimensioned, also semi-circular curved recess 11 in the example shown in the coupling part 8 facing bottom side of the coupling part. 6 In diese Position wird das Kupplungsteil 8 durch eine Druck feder 4 gedrückt, die in einer sich vom Boden des erwähnten Führungsschlitzes 12 längs der Verschiebungsrichtung des Kupplungsteils 8 fortsetzenden Bohrung sitzt. In this position the coupling member is pressed by a compression spring 4 8 extending along the direction of displacement of the coupling part is seated in a the bottom of the mentioned guide slot 12 8 continuing bore. Die Druckfeder 4 stützt sich an ihrem unteren Ende auf einer vorzugsweise von außen nicht oder nicht ohne weiteres zugänglichen Justier schraube 3 ab, mit der die Federkraft und damit die Druck kraft des Kupplungsteils 8 einstellbar ist. The compression spring 4 is supported at its lower end on a preferably not or not readily accessible from the outside screw adjusting member 3 from which the spring force and thus the pressure force of the coupling part 8 is adjustable. Die Verschiebungs richtung des Kupplungsteils 8 steht quer und bei dem dargestellten Beispiel in Ruhestellung des Instruments senkrecht zu der Verschiebungsrichtung des Kupplungsteils 6 . The displacement direction of the coupling member 8 is transverse and in the example shown in the rest position of the instrument perpendicularly to the direction of displacement of the coupling member. 6

Die Lagerschraube 7 hält das Griffstück 1 mit dem Kupplungs teil 6 , den Betätigungsgriff 2 und das Kupplungsteil 8 sowie die Feder 4 zusammen. The bearing screw 7 holds the handle 1 with the coupling part 6, the operating handle 2 and the coupling member 8 and the spring 4 together. Wenn die Lagerschraube 7 entfernt wird, können diese Teile auseinandergenommen werden, und entsprechend einfach sind sie montierbar. If the bearing screw 7 is removed, these parts can be disassembled, and correspondingly easy they are to install.

Wenn bei der Betätigung des Instrumentes dem am entfernten Ende der Stange 5 befindlichen Werkzeug ein Hindernis entgegenwirkt, zu dessen Überwindung der Arzt eine übermäßige Kraft aufwenden müßte, der das Instrument nicht oder nicht dauerhaft gewachsen ist, so soll diese für das Instrument unzulässige Betätigungskraft von der Kupplung nicht übertragen werden. If counteracts an obstacle in the operation of the instrument the tool located at the distal end of the rod 5 must expend to the overcoming of the doctor an excessive force, which is not or not up the instrument durable, so it is to impermissible for the instrument operating force of the coupling are not transmitted. Bei einer die zulässige, durch die Stellung der Justierschraube 3 definierte Größe übersteigenden Belastung wird deshalb der Vorsprung 10 des Kupplungsteils 8 gegen die Kraft der Druckfeder 4 aus der Ausnehmung 11 ausgerückt, statt das über die Stange 5 von dem Hindernis beaufschlagte Kupplungsteil 6 zu bewegen oder weiterzuschieben. Therefore, when a permissible, as defined by the position of the adjustment screw 3 size exceeding load of the projection 10 of the coupling member 8 is disengaged against the force of the compression spring 4 from the recess 11, instead of the to move over the rod 5 is acted upon by the obstacle coupling part 6 or continue to push.

Bei dem dargestellten Beispiel wird mit der Justierschraube 3 vom Hersteller des Instrumentes der maximal zulässige Druck des Kupplungsteils 8 und damit die maximale Belastbarkeit des Instrumentes festgelegt. In the illustrated example, the maximum allowable pressure of the coupling part 8, and thus the maximum load capacity of the instrument is set with the adjustment screw 3 by the manufacturer of the instrument. Es kann aber zweckmässig sein, daß der das Instrument benutzende Arzt die Möglichkeit hat, wahlweise eine geringere als die vom Hersteller vor gegebene Belastungsgrenze einzustellen. but it may be expedient that the instrument physician using has the option to either lower than set by the manufacturer before given load limit. Hierfür kann sich beispielsweise die Druckfeder 4 unmittelbar oder vorzugs weise über die Justierschraube 3 auf einem Exzenter (nicht dargestellt) abstützen, der mit dem Finger drehbar am Betätigungsgriff 2 gelagert ist und je nach Stellung die Druckfeder mehr oder weniger entlastet. For this purpose, for example, the compression spring 4 directly or preferential way of the adjustment screw 3 on an eccentric (not shown) can be supported, which is mounted rotatably with the finger on the actuating handle 2 and the compression spring more or less relieved depending on the position.

Wenn die Kupplung zur Realisierung des angestrebten Über lastungsschutzes unter Zusammenbewegung der Griffteile aus gerückt wurde, genügt es, den bewegbaren Betätigungsgriff 2 in die Ruhestellung zurückzubringen, damit der Vorsprung 10 wieder in die Ausnehmung 11 zurückspringt, da die Axial bewegung des Kupplungsteils 6 durch Anschlag am Griffstück 1 begrenzt wird. When the clutch to the achievement of the desired About lastungsschutzes under together movement of the handle parts has been moved, it is sufficient to return the movable operating handle 2 in the rest position, so that the projection 10 springs back into the recess 11 since the axial movement of the coupling member 6 by abutment on the handle is limited. 1

Bei dem beschriebenen Beispiel ist es wichtig, daß die Ver schiebungsrichtung des Kupplungsteils 8 , dh die Achse, längs der sich der Scheitelpunkt des Vorsprungs 10 bewegt, die Achse schneidet, um welche der bewegbare Betätigungsgriff 2 zu dem stationären Griffstück 1 schwenkbar ist. In the example described, it is important that the Ver displacement direction of the coupling part 8, that is the axis along which the vertex of the protrusion 10 moves, intersects the axis about which the movable operating handle 2 is pivoted to the stationary handle. 1 Würde man beispielsweise das Kupplungsteil 6 in Fig. 1 nach rechts neben die Schwenkachse, dh die Lagerschraube 7 versetzen, so würde beim Verschwenken des Betätigungsgriffes 2 wegen der ungünstigeren Hebelverhältnisse zunächst hauptsächlich eine Verschiebung des Kupplungsteils 8 quer zur Schaftachse des stationären Griffstücks 1 ohne wesentliche Verschiebung der Betätigungsstange 5 durch den Vorsprung 10 erfolgen. Would, for example, the coupling part 6 in Fig. 1 to the right of the pivot axis, that enable the bearing screw 7, it would during the pivoting of the actuating handle 2 because of unfavorable leverage ratios initially mainly a displacement of the coupling member 8 transversely to the shaft axis of the stationary grip 1 without significant displacement the actuating rod carried by the projection 10. 5

Der beschriebene, im Prinzip aus Fig. 2 ersichtliche Überlastungsschutz durch zwei relativ zueinander bewegbare Kupplungsteile, von denen der eine Teil formschlüssig beispielsweise mittels eines konvex gekrümmten Vorsprungs in den anderen Teil eingreift und mindestens eines der Teile bei Überlastung elastisch nachgibt, eignet sich für jedes beliebige Instrument der vorliegenden Gattung. The described, in principle of Fig. 2 apparent overload protection by two relatively movable coupling parts, of which the one part engages in a form-fitting manner, for example by means of a convex curved protrusion in the other part and at least one of the parts yields elastically in case of overload, is suitable for any instrument of the present kind. Die Erfindung ist auch nicht auf die in Fig. 2 dargestellte Formgebung beschränkt, sondern auf andere Weise realisier bar, wenn der Formschluß der Kupplungsteile nur bis zu einer definierten Belastung erhalten bleibt. The invention is also not limited to that shown in Fig. 2 Forming limited, but in a different way realizable bar when the positive engagement of the coupling parts is only up to a defined load condition.

Claims (11)

1. Medizinisches , insbesondere chirurgisches Instrument mit einem Griffstück ( 1 ), das mit einem Schaft ( 1 ′) verbunden ist, in oder an dem ein Betätigungselement ( 5 ) für ein Schneid- oder sonstiges Werkzeug relativ zu dem Griffteil ( 1 ) bewegbar angeordnet ist, und mit einem relativ zu dem Griffstück ( 1 ) bewegbar gelagerten Betätigungsgriff ( 2 ), der zum Verschieben des Betätigungselementes ( 5 ) mit diesem gekuppelt ist, wobei ein an dem bewegbaren Betätigungsgriff ( 2 ) angeordnetes Kupplungsteil ( 8 ) formschlüssig an einem Kupplungsteil ( 6 ) des Betätigungselementes ( 5 ) angreift, dadurch gekennzeichnet, daß die Kupplungsteile ( 6 , 8 ) derart angeordnet und aus gebildet sind, daß die Kupplung bei Überschreiten einer vorbestimmten maximalen Belastung infolge der Betätigung unter gegenseitiger Relativverschiebung der Kupplungsteile ( 6 , 8 ) gelöst wird. 1. A medical, in particular surgical instrument having a handle (1) which is connected to a shaft (1 ') to which movably arranged in or an actuating element (5) for a cutting or other tools relative to the handle part (1) , and a relative to the handle (1) is movably mounted actuating handle (2), which is for moving the actuating element (5) coupled therewith, wherein a to the movable operating handle (2) arranged coupling member (8) form-locking to a coupling part (6) the actuating element (5) engages characterized in that the coupling parts (6, 8) are arranged and made, in that the coupling on exceeding a predetermined maximum load due to the operation with mutual relative displacement of the coupling parts (6, 8) is achieved.
2. Instrument nach Anspruch 1, dadurch gekenn zeichnet, daß das eine Kupplungsteil ( 8 ) gegen die Kraft einer Feder ( 4 ) von dem anderen Kupplungsteil ( 6 ) wegbewegbar gelagert ist. 2. Instrument according to claim 1, characterized in that the one coupling part (8) is mounted can be moved away against the force of a spring (4) of the other coupling part (6).
3. Instrument nach Anspruch 2, dadurch gekenn zeichnet, daß die Federkraft justierbar und/oder ein vom Hersteller vorgegebener Maximalwert der Federkraft vom Benutzer verringerbar ist. 3. Instrument according to claim 2, characterized in that the spring force adjustable and / or a predetermined maximum value by the manufacturer of the spring force by the user can be reduced.
4. Instrument nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das eine Kupplungsteil ( 8 ) bewegbar an dem bewegbaren Betätigungsgriff ( 2 ) gelagert ist. 4. Instrument according to any one of the preceding claims, characterized in that the one coupling part (8) movable on the movable operating handle (2) is mounted.
5. Instrument nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das eine Kupplungsteil ( 8 ) quer zur Verschiebungsrichtung des Betätigungselements ( 5 ) verschiebbar gelagert ist und mit einer Stirnfläche formschlüssig an dem anderen Kupplungs teil ( 6 ) angreift. 5. Instrument according to any one of the preceding claims, characterized in that the one coupling part (8) is mounted transversely to the displacement direction of the operating member (5) slidably and engages with an end face of a form-fitting on the other coupling part (6).
6. Instrument nach Anspruch 5, dadurch gekennzeichnet, daß die Verschiebungsrichtung des am anderen Kupplungsteil ( 6 ) angreifenden Teils ( 10 ) des einen Kupplungsteils ( 8 ) die Achse (Schraube 7 ) schneidet, um welche der bewegbare Betätigungsgriff ( 2 ) zu dem stationäre Griffstück ( 1 ) schwenkbar ist. 6. An instrument according to claim 5, characterized in that attacking the direction of displacement of the other coupling part (6) part (10) of the axis (screw 7) cuts one coupling part (8) around which the movable operating handle (2) to the stationary handle (1) is pivotable.
7. Instrument nach Anspruch 6, dadurch gekennzeichnet, daß das verschiebbare Kupplungs teil ( 8 ) mit einem sich in der Verschiebungsrichtung erstrecken den Langloch ( 13 ) auf einer den Betätigungsgriff ( 2 ) mit dem Griffstück ( 1 ) verbindenden Schraube ( 7 ) sitzt. 7. Instrument according to claim 6, characterized in that the displaceable coupling part (8) with a in the direction of displacement extending the elongated hole (13) on one of the operating handle (2) with the handle (1) connecting the screw (7) is seated.
8. Instrument nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das eine Kupplungsteil ( 8 ) mit einem Vorsprung ( 10 ) mit konvex gekrümm ter Stirnfläche in eine entsprechend bemessene Ausnehmung ( 11 ) des anderen Kupplungsteils ( 6 ) eingreift. 8. Instrument according to any one of the preceding claims, characterized in that the one coupling part (8) engages with a projection (10) with convex gekrümm ter end face in a correspondingly dimensioned recess (11) of the other coupling part (6).
9. Instrument nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das eine Kupplungsteil ( 8 ) verschiebbar in einem Führungs schlitz ( 12 ) in einer dem anderen Kupplungsteil ( 6 ) zugewandten Stirnfläche des bewegbaren Betätigungsgriffs ( 2 ) sitzt und von einer in einer Bohrung am Ende des Schlitzes befindlichen Druckfeder ( 4 ) beaufschlagt wird. 9. Instrument according to any one of the preceding claims, characterized in that the one coupling part (8) slidably slot in a guide (12) is seated facing in the other coupling part (6) end face of the movable operating handle (2) and of a in a bore located at the end of the slot pressure spring (4) is applied.
10. Instrument nach Anspruch 9, dadurch gekennzeichnet, daß sich die Druckfeder ( 4 ) auf einer Justierschraube ( 3 ) und/oder einem mit dem Finger verstellbaren Exzenter abstützt. 10. Instrument according to claim 9, characterized in that the compression spring (4) on an adjusting screw (3) and / or an adjustable eccentric with the finger rests.
11. Instrument nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Form schluß der Kupplungsteile ( 6 , 8 ) durch Zurückstellen des bewegbaren Betätigungsgriffes ( 2 ) in die Ruheposition selbst tätig wiederherstellbar ist. 11. Instrument according to any one of the preceding claims, characterized (6, 8) in that the positive engagement of the coupling parts by resetting the movable operating handle (2) has been restored to the rest position itself.
DE19873709067 1987-03-19 1987-03-19 Medical, especially surgical, instrument Withdrawn DE3709067A1 (en)

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