DE202007003114U1 - Medical forceps has a removable tool that fits into a retaining sleeve that has a snap action element that prevents rotation - Google Patents

Medical forceps has a removable tool that fits into a retaining sleeve that has a snap action element that prevents rotation

Info

Publication number
DE202007003114U1
DE202007003114U1 DE200720003114 DE202007003114U DE202007003114U1 DE 202007003114 U1 DE202007003114 U1 DE 202007003114U1 DE 200720003114 DE200720003114 DE 200720003114 DE 202007003114 U DE202007003114 U DE 202007003114U DE 202007003114 U1 DE202007003114 U1 DE 202007003114U1
Authority
DE
Grant status
Grant
Patent type
Prior art keywords
transverse slot
slot
pliers
sleeve
fits
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.)
Expired - Lifetime
Application number
DE200720003114
Other languages
German (de)
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.)
Olympus Winter and Ibe GmbH
Original Assignee
Olympus Winter and Ibe 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
Grant date

Links

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
    • A61B2017/00477Coupling
    • 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
    • A61B2017/2926Details of heads or jaws
    • A61B2017/2931Details of heads or jaws with releasable head

Abstract

The working head of a medical forceps have a coupling that locate in a sleeve [5] with a bayonet action. The projecting end of the forceps fits in a channel [6] and has an angled tip [9] that passes a projection [12] by deflecting a formed leaf spring [11] with a snap action.

Description

  • Die Erfindung betrifft eine Zange der im Oberbegriff des Anspruch 1 genannten Art. The invention relates to a gripper of the type mentioned in the preamble of claim. 1
  • Gattungsgemäße Zangen sind zu Reinigungszwecken mehrteilig zerlegbar, wobei insbesondere der Zangenkopf vom Schaftrohr abkuppelbar ist. Generic jaws are multi-part separable for cleaning purposes, in particular the pliers head from the shank tube is uncoupled. Üblicherweise ist dabei auch noch das Schaftrohr vom Handhabungsteil mit den Betätigungsgriffen abkuppelbar. Usually, it is also totally the shaft tube by manipulating member with the operating handles uncoupled. Die Bajonettverbindung bildet dabei, wenn der Stift in Kupplungsstellung im Querschlitz steht, die Zugverbindung zwischen Zangenkopf und Schaftteil. The bayonet connection forms when the pin is in the coupling position in the transverse slot, the train connection between the pliers head and shaft portion.
  • Bei bekannten Bajonettkonstruktionen ist eine zusätzliche Drehsicherung erforderlich, die außerhalb der Bajonettverbindung eine Drehsicherung zwischen Zangenkopf und Schaftrohr ergibt. In known bayonet constructions, an additional rotation is required, which results in a rotation between the tong head and the shaft tube outside of the bayonet connection. Dadurch wird vermieden, daß bei Drehbewegungen mit der Zange sich der Zangenkopf gegenüber dem Schaftrohr dreht und der Stift außer Eingriff mit dem Querschlitz gelangt. This avoids that, when rotational movements of the tongs head with respect to the shaft tube rotates with the tongs, and the pin is disengaged from the transverse slot. Das könnte zum Abfallen des Zangenkopfes im Patienten führen, was erhebliche nachteilige Folgen hätte. That could lead to the fall of the pliers head in the patient, which would have significant adverse consequences.
  • Eine gattungsgemäße Zange ist aus der A generic pliers is made of DE 94 18 094 U1 DE 94 18 094 U1 bekannt, wobei der Querschlitz als einfacher gerader Schlitz mit parallelen Rändern ausgebildet ist. known, where the cross slot is formed as a simple slot with straight parallel edges. Bei der Bekannten Konstruktion ist eine zusätzliche Drehsicherung am proximalen Ende der Zugstange vorgesehen, die die Schließbewegung der Zange steuert und vom Zangenkopf ausgehend das Schaftrohr bis zu einem Handhabungsteil am proximalen Ende durchläuft. In the known construction, an additional rotation to the proximal end of the pull rod is provided, which controls the closing movement of the tongs, and starting the shaft tube to a handle member at the proximal end passes through the collet head.
  • Aus anderen technischen Gebieten sind Bajonettverbindungen mit integrierter Drehsicherung bekannt, die am Ende des Querschlitzes einen parallel zum Längsschlitz laufenden Sackschlitz und eine in Achsrichtung wirkende Rückhaltefeder aufweist. From other technical areas bayonet connections with integrated rotation are known, comprising a running parallel to the longitudinal slot blind slot and a force acting in the axial direction retaining spring at the end of the transverse slot. Versuche, diese Konstruktion auf dem Gebiet medizinischer Zangen einzusetzen, scheiterten an den beengten Platzverhältnissen und insbesonere an den Reinigungsanforderungen. Attempts to use this design in the field of medical forceps failed due to the limited space and insbesonere to the cleaning requirements.
  • Die Aufgabe der vorliegenden Erfindung besteht darin, eine gattungsgemäße Zange mit verbesserter Drehsicherung zu schaffen. The object of the present invention is to provide a generic tool with improved rotation.
  • Diese Aufgabe wird mit dem Merkmal des Anspruches 1 gelöst. This object is achieved with the feature of claim 1.
  • Erfindungsgemäß ist der Querschlitz des Bajonetts mit einem federnden Seitenrand und einer Nase an einem Seitenrand ausgebildet. According to the invention the transverse slot of the bayonet is formed with a resilient side edge and a tab on a side edge. Wenn durch entsprechende Verdrehung des Zangenkopfes gegenüber dem Schaftrohr der Stift in den Querschlitz gedrückt wird, so kann er an der seine Weiterbewegung versperrenden Nase vorbei gelangen, indem er den federnden Seitenrand zur Seite drückt. When the pin is pressed into the transverse slot by corresponding rotation of the tongs head with respect to the shaft tube, so it can at its further movement obstructing nose get over, by pressing the resilient side edge to the side. Der Stift rastet dann hinter der Nase ein und ist durch den rückfedernden Seitenrand und die Nase gegen Rückbewegung im Querschlitz gesichert. The pin then engages behind the nose and is secured by the spring-back side edge and the nose against return movement in the transverse slot. Dadurch ergibt sich eine wirkungsvolle Drehsicherung, die den Bajonetteingriff auch bei auf den Zangenkopf einwirkenden Drehkräften sichert. This results in an effective rotation that secures the bayonet engagement even when acting on the pliers head rotational forces. Ist die Federwirkung des Seitenrandes ausreichend stark, so kann auf die zusätzliche Drehsicherung am proximalen Ende der Betätigungsstange verzichtet werden. If the spring action of the side edge sufficiently strong, it can be dispensed with the additional rotation at the proximal end of the actuating rod. Wird diese aus Sicherheitsgründen beibehalten, so dient die erfindungsgemäße Drehsicherung zumindest der verliersicheren Halterung des Zangenkopfes am Schaftrohr, solange diese beiden Teile in verriegelter Stellung gehandhabt werden und die endgültige Drehsicherung am proximalen Ende der Zugstange noch nicht hergestellt ist. If this maintained for safety reasons, so the rotation lock of the present invention serves at least the captive mounting of the pliers head to the shaft tube, as long as these two parts are handled in the locked position and the final rotation at the proximal end of the pull rod is not yet established. Es ergibt sich also eine Sicherung für die Handhabung der teilweise demontierten Zange. Accordingly, there is a backup for the handling of the partially disassembled pliers.
  • Vorteilhaft ist der federnde Bereich des Querschlitzes gemäß Anspruch 2 als Federzunge ausgebildet. the resilient region of the transverse slot is advantageously formed as a flexible tongue according to claim. 2 Dabei sind vorteilhaft die Merkmale des Anspruches 3 vorgesehen, wonach die Federzuge integral aus dem Material der Hülse frei geschnitten ist. The features of claim 3 are advantageously provided, according to which the spring part is integrally cut out of the material of the sleeve. Es ergibt sich eine technisch sehr einfache Konstruktion, die verschiedene vorteilhafte Ausführungsvarianten ermöglicht. The result is a technically very simple design that enables various advantageous embodiments.
  • In den Zeichnungen ist die Erfindung beispielsweise und schematisch dargestellt. In the drawings, the invention is shown, for example and schematically. Es zeigen: Show it:
  • 1 1 : den distalen Endbereich einer erfindungsgemäßen Zange mit vom Schaftrohr abgenommenen Zangenkopf, unter Darstellung einer Bajonetthülse nach dem Stand der Technik, : The distal end portion of a forceps according to the invention with removed from the shaft pipe wrench head, showing a bayonet sleeve according to the prior art,
  • 2 2 : eine vergrößerte Darstellung der Bajonetthülse in einer ersten Ausführungsform der Erfindung, An enlarged view of the bayonet sleeve in a first embodiment of the invention,
  • 3 3 : die Bajonetthülse gemäß : The bayonet sleeve according to 2 2 in einer zweiten Ausführungsform der Erfindung, in a second embodiment of the invention,
  • 4 4 : die Bajonetthülse der : The bayonet sleeve 2 2 in einer dritten Ausführungsform der Erfindung und in a third embodiment of the invention, and
  • 5 5 : die Bajonetthülse der : The bayonet sleeve 2 2 in einer vierten Ausführungsform. in a fourth embodiment.
  • 1 1 zeigt den distalen Endbereich des Schaftrohres shows the distal end portion of the shaft tube 1 1 einer medizinisch Zange mit abgenommenen Zangenkopf Medical forceps with a head of the pliers removed 2 2 der mit einem nicht dargestellten Gelenk zwei gegeneinander bewegbare Maulteile with a not shown joint two mutually movable jaw parts 3 3 trägt. wearing. Vom Zangenkopf The pliers head 2 2 ragt in proximale Richtung eine Zugstange extends in the proximal direction a drawbar 4 4 , die bei Bewegung in axialer Richtung (Pfeil) eine Öffnungs- oder Schließbewegung der Maulteile , Which upon movement in the axial direction (arrow) has an opening or closing movement of the jaw parts 3 3 (Pfeil) bewirkt. (Arrow) causes.
  • Im distalen Endbereich des Schaftrohres In the distal end of the shaft tube 1 1 ist eine Bajonetthülse is a bayonet sleeve 5 5 befestigt, die einen typischen Bajonettschlitz nach dem Stand der Technik aufweist. attached, which has a typical bayonet slot according to the prior art. Dieser besteht aus einem Längsschlitz This consists of a longitudinal slot 6 6 und einem Querschlitz and a transverse slot 7 7 . ,
  • Am Zangenkopf At the head of the pliers 2 2 ist nach proximal ragend ein zum Eingriff in die Bajonetthülse is proximally projecting a for engagement in the bayonet sleeve 5 5 ausgebildeter zylindrischer Vorsprung formed cylindrical projection 8 8th befestigt, auf dem ein Stift attached, on which a pin 9 9 radial stehend befestigt ist. is fixed radially standing.
  • Zur Verbindung des Zangenkopfes To connect the pliers head 2 2 mit dem Schaftrohr with the shaft tube 1 1 wird der Vorsprung the protrusion 8 8th in die Bajonetthülse in the bayonet sleeve 5 5 derart eingeführt daß der Stift inserted so that the pin 9 9 in den am distalen Ende der Bajonetthülse in the distal end of the bayonet sleeve 5 5 offenen Längsschlitz open longitudinal slot 6 6 einläuft und nach Verdrehung des Zangenkopfes enters and after twisting of the pliers head 2 2 gegenüber dem Schaftrohr relative to the shaft tube 1 1 in den Querschlitz in the transverse slot 7 7 einläuft. enters. Dort sichert der Stift There secures the pin 4 4 den Zangenkopf the pliers head 2 2 gegen Abziehen vom Schaftrohr against being pulled off from the shaft pipe 1 1 . ,
  • Beim Arbeiten mit der in When working with the in 1 1 dargestellten Zange kann es zu Drehkräften kommen, wenn mit der Zange zugegriffen wird und am nicht dargestellten Handgriff der Zange gedreht wird, um bestimmte Kräfte durch die Zange auszuüben. Pliers shown may occur rotational forces when accessed with the pliers and turned on, not shown handle of the pliers to exercise certain powers by the pliers. Dabei kann der Stift aus dem Querschlitz In this case, the pin from the transverse slot 7 7 herausdrehen und beim anschließen den Ziehen am Handgriff kann sich der Zangenkopf Unscrew and when connecting the pull on the handle, the tong head may 2 2 lösen. to solve.
  • Bei bekannten Zangen dieser Art ist daher eine zusätzliche Drehsicherung erforderlich, die beispielsweise am proximalen Ende der Zugstange Therefore, in the known pliers of this type, an additional rotation is required, for example, at the proximal end of the drawbar 4 4 angreifen kann. can attack.
  • Erfindungsgemäß ist der Bajonetteingriff selbst mit Drehsicherung ausgebildet, wie in den Ausführungsformen der According to the invention, the bayonet engagement is itself formed with rotation, as in the embodiments of 2 2 bis to 4 4 dargestellt ist. is shown. Dabei werden soweit möglich die selben Bezugszeichen wie in Here, as far as possible, the same reference numerals as in 1 1 verwendet. used.
  • Wie As 2 2 zeigt, bleibt dabei der Längsschlitz shows, remains the longitudinal slot 6 6 unverändert. unchanged. Der Querschlitz The transverse slot 7 7 weist jedoch an einem seiner Längsränder eine mit einer Hinterschneidung However, at one of its longitudinal edges a with an undercut 10 10 freigeschnittene Federzunge cut-free spring tongue 11 11 auf, die an einem Ende mit der bajonetthülse on the bayonet sleeve at one end to the 5 5 verbunden und am anderen (in and at the other (in 2 2 oberen) Ende frei ist. upper) end is free. Die Federzunge The spring tongue 11 11 ist so ausgebildet, dass sie in der Zeichnungsebene, also in der Zylindersfläche der Bajonetthülse is formed so that it in the plane of the drawing, that is in the cylindrical surface of the bayonet sleeve 5 5 seitlich zum Freiraum der Hinterschneidung laterally to the free space of the undercut 10 10 hin Feder nachgeben kann. may yield back spring. Der der Federzuge The spring course 11 11 gegenüberliegende Seitenrand des Querschlitzes opposite side edge of the transverse slot 7 7 ist mit einer in den Querschlitz ragenden Nase is provided with a projecting into the transverse slot nose 12 12 versehen. Provided. Der Stift The pencil 9 9 kann durch seitliches Wegdrücken der federnd nachgebenden Federzunge can by lateral pushing away of the resiliently yieldable spring tongue 11 11 hinter die Nase behind the nose 12 12 einrasten und ist dann gegen Drehung gesichert. into place and is then secured against rotation.
  • Bei der Ausführungsform der In the embodiment of 2 2 liegt die Federzunge is the spring tongue 11 11 am distal liegenden Rand des Querschlitzes the distally facing edge of the transverse slot 7 7 . , 3 3 zeigt eine Ausführungsvariante bei der bei derselben Federkonstruktion die distalen und proximalen Ränder des Querschlitzes shows a variant embodiment in which at the same spring construction, the distal and proximal edges of the transverse slot 7 7 vertauscht sind. are reversed. Die Konstruktion der The construction of the 3 3 hat den Vorteil, daß, wenn der Zangenkopf has the advantage that when the pliers head 2 2 mit großer Kraft vom Schaftrohr with great force from the shaft tube 1 1 in distaler Richtung abgezogen wird, diese Kraft besser aufgefangen wird, da bei der Ausführungsform der this force is better collected is withdrawn in the distal direction, as in the embodiment of 3 3 der Stift the pencil 9 9 in distaler Richtung gegen einen feststehenden Seitenrand des Querschlitzes in the distal direction against a fixed side edge of the transverse slot 7 7 anliegt. is applied.
  • Bei den Ausführungsformen der In the embodiments of 2 2 und and 3 3 ist jeweils die Federzunge In each case the resilient tongue 11 11 nicht nur auf Ihrer dem Querschlitz not only on your the transverse slot 7 7 abgewandten Längsseite freigeschnitten, sondern auch an einem Ende und zwar an dem Ende, das von dem Längsschlitz cut free longitudinal side facing away, but also at one end and that at the end of the longitudinal slot 6 6 abgewandt ist. is remote. An ihrem anderen, den Längsschlitz At the other, the longitudinal slot 6 6 benachbarten Ende ist sie integral mit der Hülse adjacent end it is integral with the sleeve 5 5 ausgebildet. educated.
  • 4 4 zeigt eine Ausführungvariante, die weitgehend der der shows a variant, which is largely of the 2 2 entspricht. equivalent. Die Federzunge The spring tongue 11 11 ist hier jedoch an beiden Enden integral mit der Bajonetthülse here, however, integral with the bayonet sleeve at both ends 5 5 verbunden. connected. Sie federt nur in ihrem mittleren Bereich, jedoch mit wesentlich höherer Federhärte so daß sich eine weiter verbesserte Drehsicherung ergibt. It absorbs only in its central region, but with a much higher spring rate so that there is a further improved rotation. Auch diese Variante ist mit vertauschten Rändern gemäß This variant is also with reversed edges as 3 3 ausführbar. executable.
  • Auch die Ausführungsform der The embodiment of 4 4 , die im Wesentlichen dem der of substantially the 2 2 entspricht, kann in umgedrehter Bauweise gemäß corresponds, according to in an inverted construction 3 3 ausgebildet sein. be formed. In nicht dargestellter Ausführung ist dazu die Hinterschneidung In embodiment not shown is, the undercut 1Q 1Q von der in der Figur linken auf die rechte Seite zu verlegen und entsprechend die Nase to move from the left in the figure on the right side, and accordingly the nose 12 12 von der rechten auf die linke Seite zu verlegen. from the left side to move to the right.
  • In allen bisher erläuterten Ausführungsformen bildet die Federzunge In all previously described embodiments, the spring tongue forms 11 11 den einen Seitenrand des Querschlitzes the one side edge of the transverse slot 7 7 , während die Nase While the nose 12 12 an dem der Federzunge at which the spring tongue 11 11 gegenüberliegenden feststehenden Seitenrand angeordnet ist. opposite fixed side edge is arranged.
  • 5 5 zeigt eine Ausführungsform, die grundsätzlich der shows an embodiment, in principle, the 2 2 entspricht, bei der jedoch die Nase corresponds to, but in which the nose 12 12 nicht am feststehenden Seitenrand des Querschlitzes not on the fixed side edge of the transverse slot 7 7 angeordnet ist, sondern auf der Federzunge is arranged, but on the spring tongue 11 11 . , Die Funktionsweise dieser Konstruktion entspricht der der anderen Ausführungsvariante. The operation of this structure corresponds to that of the other variant.
  • Auch bei den Ausführungsvarianten der Also in the embodiments of 2 2 und and 3 3 kann die Nase can the nose 12 12 von dem feststehenden Seitenrand auf die Federzunge verlegt werden. be moved from the fixed side edge on the spring tongue.
  • Anders als dargestellt, kann die Bajonetthülse Other than illustrated, the bayonet sleeve can 5 5 auch am Zangenkopf Also on the tong head 2 2 und der Stift and the pin 9 9 am Schaftrohr the shaft tube 1 1 angeordnet sein. be disposed. Ferner können in üblicher Weise jeweils zwei Stifte in eine Bajonetthülse mit zwei Schlitzen eingreifen. Furthermore, two pins can be engaged in a bayonet sleeve with two slots in a conventional manner.

Claims (3)

  1. Medizinische Zange mit einem von einem Schaftrohr ( A medical forceps with a (of a shaft tube 1 1 ) mit einer Bajonettverbindung ( ) (With a bayonet connection 6 6 , . 7 7 , . 9 9 ) abkuppelbaren Zangenkopf ( ) Disconnectable pliers head ( 2 2 ), wobei die Bajonettverbindung ( ), Wherein the bayonet connection ( 6 6 , . 7 7 , . 9 9 ) zwischen einem radial zur Schaftachse stehenden Stift ( ) (Between a radially to the shaft axis pin 9 9 ) und einem in einer Hülse ( ) And a (in a sleeve 5 5 ) angeordneten Schlitz ( ) Arranged slot ( 6 6 , . 7 7 ) erfolgt, welcher aus einem parallel zur Schaftachse stehenden Längsschlitz ( ) Takes place, which (from a standing parallel to the shaft axis longitudinal slot 6 6 ) und einem anschließenden, in Umfangsrichtung stehenden Querschlitz ( ) And a subsequent property in the circumferential direction transverse slot ( 7 7 ) besteht, dadurch gekennzeichnet , dass der Querschlitz ( ), Characterized in that the transverse slot ( 7 7 ) in seiner Erstreckungsrichtung von zwei Seitenrändern begrenzt wird, von denen der eine einen seitlich federnden Bereich ( ) Is limited in its direction of extension of two side edges, one of which (an a laterally resilient region 11 11 ) aufweist und wobei einer der Seitenränder mit einer in den Querschlitz ( ), And wherein one of the side edges with one (in the transverse slot 7 7 ) ragenden Nase ( ) Projecting nose ( 12 12 ) ausgebildet ist. ) is trained.
  2. Zange nach Anspruch 1, dadurch gekennzeichnet, dass der federnde Bereich als parallel zum Querschlitz ( Pliers according to claim 1, characterized in that the resilient region as (parallel to the transverse slot 7 7 ) erstreckte, endseitig befestigte Federzunge ( ) Stretched, the end attached spring tongue ( 11 11 ) ausgebildet ist. ) is trained.
  3. Zange nach Anspruch 2, dadurch gekennzeichnet, dass die Federzunge ( Pliers according to claim 2, characterized in that the spring tongue ( 11 11 ) integral mit der Hülse ( ) Integral to the sleeve ( 5 5 ) ausgebildet und auf ihrer dem Querschlitz ( ) And formed (on its side facing the transverse slot 7 7 ) abgewandten Seite freigeschnitten ( ) Side facing away from cut free ( 10 10 ) ist. ) Is.
DE200720003114 2006-06-13 2007-03-03 Medical forceps has a removable tool that fits into a retaining sleeve that has a snap action element that prevents rotation Expired - Lifetime DE202007003114U1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE102006027601 2006-06-13
DE102006027601.9 2006-06-13
DE200720003114 DE202007003114U1 (en) 2006-06-13 2007-03-03 Medical forceps has a removable tool that fits into a retaining sleeve that has a snap action element that prevents rotation

Applications Claiming Priority (1)

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DE200720003114 DE202007003114U1 (en) 2006-06-13 2007-03-03 Medical forceps has a removable tool that fits into a retaining sleeve that has a snap action element that prevents rotation

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