[go: up one dir, main page]

WO2025040662A1 - Mécanisme de désassemblage entre une unité d'arbre et une poignée - Google Patents

Mécanisme de désassemblage entre une unité d'arbre et une poignée Download PDF

Info

Publication number
WO2025040662A1
WO2025040662A1 PCT/EP2024/073306 EP2024073306W WO2025040662A1 WO 2025040662 A1 WO2025040662 A1 WO 2025040662A1 EP 2024073306 W EP2024073306 W EP 2024073306W WO 2025040662 A1 WO2025040662 A1 WO 2025040662A1
Authority
WO
WIPO (PCT)
Prior art keywords
instrument
handle
shaft
transmission
actuating lever
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.)
Pending
Application number
PCT/EP2024/073306
Other languages
German (de)
English (en)
Inventor
Sven Barthelmes
Christoph Rothweiler
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
Application filed by Aesculap AG filed Critical Aesculap AG
Priority to EP24759101.9A priority Critical patent/EP4572687A1/fr
Publication of WO2025040662A1 publication Critical patent/WO2025040662A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A61B17/2909—Handles
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/1442—Probes having pivoting end effectors, e.g. forceps
    • A61B18/1445—Probes having pivoting end effectors, e.g. forceps at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B2017/0046—Surgical instruments, devices or methods with a releasable handle; with handle and operating part separable
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A61B17/2909—Handles
    • A61B2017/2912—Handles transmission of forces to actuating rod or piston
    • A61B2017/2919—Handles transmission of forces to actuating rod or piston details of linkages or pivot points
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A61B17/2909—Handles
    • A61B2017/2912—Handles transmission of forces to actuating rod or piston
    • A61B2017/2919—Handles transmission of forces to actuating rod or piston details of linkages or pivot points
    • A61B2017/292—Handles 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A61B17/2909—Handles
    • A61B2017/2912—Handles transmission of forces to actuating rod or piston
    • A61B2017/2923—Toothed members, e.g. rack and pinion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A61B17/2909—Handles
    • A61B2017/2925—Pistol grips
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A61B2017/2926—Details of heads or jaws
    • A61B2017/2927—Details of heads or jaws the angular position of the head being adjustable with respect to the shaft
    • A61B2017/2929—Details of heads or jaws the angular position of the head being adjustable with respect to the shaft with a head rotatable about the longitudinal axis of the shaft
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A61B2017/2926—Details of heads or jaws
    • A61B2017/2932—Transmission of forces to jaw members
    • A61B2017/2933—Transmission of forces to jaw members camming or guiding means
    • A61B2017/2936—Pins in guiding slots
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A61B2017/2946—Locking means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, 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
    • A61B90/08—Accessories or related features not otherwise provided for
    • A61B2090/0813—Accessories designed for easy sterilising, i.e. re-usable
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, 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
    • A61B90/03—Automatic limiting or abutting means, e.g. for safety

Definitions

  • the present disclosure relates to a surgical instrument, in particular an electrosurgical instrument of the minimally invasive shaft design.
  • Electro- surgical instruments particularly of a minimally invasive design, are already known from the prior art, which enable cutting, gripping, holding and/or clamping of body tissue by means of a tool, in particular a multi-part tool constructed from two scissor-, jaw-, forceps- or tweezers-shaped tool branches/elements that can be moved relative to/to one another, in particular pivotable, in order to coagulate, cauterize or sever this tissue in a monopolar or bipolar manner by applying a high-frequency voltage.
  • a tool in particular a multi-part tool constructed from two scissor-, jaw-, forceps- or tweezers-shaped tool branches/elements that can be moved relative to/to one another, in particular pivotable, in order to coagulate, cauterize or sever this tissue in a monopolar or bipolar manner by applying a high-frequency voltage.
  • a tool in particular a multi-part tool constructed from two scissor-, jaw-, forceps
  • An instrument is also known from US 2013/0304041 A1, which has a handle, an instrument shaft coupled to it (consisting of an inner shaft and an outer shaft) and a transmission mounted in the instrument shaft.
  • the tool is articulated (or articulated) at a distal (/far from the surgeon or near the patient) end of the instrument or shaft assembly, in particular at an instrument shaft of the shaft assembly, and is coupled to a handle at a proximal (/far from the surgeon or near the patient) end of the instrument or shaft assembly for actuation (/operation) of the tool via a transmission, preferably in the form of a pull/push rod arranged inside the instrument shaft, in particular a longitudinally displaceable pull/push rod.
  • the handle has a corresponding Actuating element (e.g.
  • a handle/trigger lever in the form of a handle/trigger lever, a button, a rotary knob, a scissor handle
  • actuation leads to a correspondingly implemented movement of the tool branches at the place of use/application, such as a cutting/gripping/holding/clamping movement and/or a rotating/pivoting movement on or in the tissue of a patient.
  • Electrosurgical instruments of the relevant design generally use a so-called pistol handle with a rigid/immovable handle shell, in particular in the form of a (gear) housing that extends from distal to proximal, i.e. essentially along a shaft axis of the instrument shaft, and a fixed handle element that extends at an angle/transversely to the distal-proximal direction and is formed (integrally/directly) on a proximal end section of the (gear) housing or is fixed to it (as a separate, firmly connected component).
  • a rigid/immovable handle shell in particular in the form of a (gear) housing that extends from distal to proximal, i.e. essentially along a shaft axis of the instrument shaft, and a fixed handle element that extends at an angle/transversely to the distal-proximal direction and is formed (integrally/directly) on a proximal end section of the (gear) housing or is fixed to it (as
  • An actuating lever in particular manually operable, preferably finger-guided or finger-guided, is pivotally connected to the handle shell, which - for example in a monkey grip - can be held by several fingers of a gripping hand of a surgeon/operator and can be manually pulled towards the handle shell, in particular the handle element, for actuation.
  • This pulling/actuating movement of the actuating lever/trigger guard is transmitted to the tool/instrument via a gear housed in the (gearbox) housing via the transmission within the instrument shaft that is coupled or can be coupled to the handle, in order to move/actuate it accordingly.
  • a type of switch is preferably attached to the pistol handle, by means of which the high-frequency voltage can be applied to the tool.
  • At least one of the two tool branches can be equipped with an electrode or row of electrodes, via which the high-frequency voltage can be selectively introduced into the patient's tissue.
  • an electrosurgical instrument of the monopolar type would be used, in which a patient lies on a metal plate, for example, via which the high-frequency voltage is discharged.
  • both opposing tool branches can also be equipped with a corresponding electrode or row of electrodes. or be made of an electrically conductive material so that the high-frequency voltage is only present in a gap between the branches. In this case, it would be a bipolar electrosurgical instrument.
  • a surgical instrument which is simply constructed, meets the requirements for its functionality and enables detachability.
  • a surgical instrument in particular an electrosurgical instrument of the minimally invasive shaft design.
  • the instrument has a handle, which is in particular designed in the form of a pistol handle.
  • the handle has a gear housing and an actuating lever which is pivotally connected to the gear housing, in particular manually actuated, preferably finger-guided, by means of which an actuating force (by the surgeon) can be applied.
  • the instrument also has an instrument shaft which is coupled or can be coupled to the handle, as well as a translationally displaceable transmission, preferably in the form of a pull/push rod, mounted in the instrument shaft.
  • the instrument also has a gear housed in the gear housing, which is in operative engagement with the actuating lever and is coupled or can be coupled to the transmission, so that a pivoting movement of the actuating lever can be transformed into a translational movement of the transmission via the gear.
  • the instrument shaft when coupled to the handle, serves as a stop for the Pivoting movement of the operating lever such that decoupling of the transmission (pull/push rod) from the gear is only (/exclusively) possible when the instrument shaft is decoupled from the handle due to the loss of its stop function. This means that decoupling of the pull/push rod from the gear is blocked when the instrument shaft is coupled to the handle due to its stop function.
  • a core of the present disclosure is therefore that the instrument shaft is first decoupled from the handle (and thus freely displaceable axially), whereby a translation limitation between the transmission (which is axially fixed in the instrument shaft) (beyond its "normal" working range limited by the instrument shaft) and the handle or the gear accommodated therein is eliminated, so that the transmission and the gear (or a coupling section of the gear for the transmission) can be moved into a position relative to one another (which would otherwise not be reachable due to the translation limitation) in which their coupling can (only) be released.
  • the stop formed by the instrument shaft can be designed as an axial stop that limits the translational movement of the transmission (pull/push rod), in particular on both sides.
  • the stop can be formed in that the transmission has a pin that is accommodated in a slot on the instrument shaft, so that when the pin rests against the slot edge, further translational movement (in the direction of the slot edge) is prevented.
  • the stop can preferably be designed on a distal end region of the instrument shaft.
  • the instrument can be pre-tensioned into a disassembly position in which the decoupling of the transmission is possible. This means that the decoupling is triggered (automatically) without manual operation when the stop function is no longer available.
  • the transmission can have a (second) rotating part which is operatively connected to the actuating lever and whose Rotation can be coupled or is coupled to the translational movement of the transmission via a (first) axial form-fitting connection.
  • the first axial form-fitting connection is formed in particular by an axially undercut recess in the rotating part, into which the transmission, in particular a proximal end region, in particular a ball pressure piece of the pull/push rod (in the coupled state of the instrument shaft and thus the pull/push rod) engages in an axially undercutting manner. In this way, the rotation of the rotating part can be effectively coupled to the (axial) translational movement.
  • the rotating part can be mounted so as to be rotatable relative to the actuating lever. This means that a relative rotation between the rotating part and the actuating lever is possible.
  • the transmission can be translationally displaceable, in particular longitudinally movable, in the decoupled state of the instrument shaft and, as a result, the rotating part can be rotated so far in the decoupled state of the instrument shaft that the axial form-fitting connection between the transmission and the rotating part can be released.
  • the transmission (pull/push rod) (together with the instrument shaft or the entire shaft assembly) can be pulled in the distal direction (out of the handle).
  • the rotating part can be accommodated in the handle in a spring-loaded manner and a spring-loaded position of the rotating part can press the rotating part (in particular in a direction opposite to an actuation direction) into a disassembly position in which the (first) axial positive connection between the transmission and the rotating part can be released.
  • a spring-loaded position of the rotating part can press the rotating part (in particular in a direction opposite to an actuation direction) into a disassembly position in which the (first) axial positive connection between the transmission and the rotating part can be released.
  • the instrument shaft or the entire shaft assembly is pressed by the spring-loaded position into the position (out of the handle) in which the transmission can be decoupled from the gear. This can make disassembly easier.
  • the fixed handle element can be arranged proximal to the actuating lever. This results in ergonomic actuation.
  • the fixed handle element can be designed without a handle opening, in particular without a finger receiving opening and/or without a thumb receiving opening. This means that the fixed handle element is designed to be gripped by a hand (palm) on the outside. This means that the handle cannot be operated in a scissor-like manner or without using the thumb.
  • the instrument can have a disassembly button, which can be operated manually, and by operating this button the instrument shaft can be axially decoupled from the handle.
  • the disassembly button blocks the axial displacement of the instrument shaft relative to the handle, so that the transmission can only move over its translational range/longitudinal range/working range/working stroke limited by the stop function of the instrument shaft when the disassembly button is operated. This also means that the decoupling of the instrument shaft can be actuated manually.
  • the disassembly button can have a locking slide which is accommodated in the handle in a (longitudinal) manner and which can be or is coupled to the instrument shaft via a (second) axial form-fitting connection.
  • the (second) axial form-fitting connection can preferably be released by a (longitudinal) displacement of the disassembly button (relative to the handle). This means that the coupling between the disassembly button and the instrument shaft is positively locked.
  • the closing slide can be accommodated in the handle in a spring-loaded manner and the (second) axial form-fitting connection can be released against a spring-loaded closing slide. This means that when the closing slide or the disassembly button is not actuated, the axial displacement of the instrument shaft is blocked.
  • the axial form-fitting connection can be formed by a slot-like slot formed in the locking slide, through which the instrument shaft can be guided axially in the decoupled state.
  • the instrument shaft (when the disassembly button is actuated) is not in axial form-fitting engagement with the slot and can thus be guided axially through the slot and (when the disassembly button is not actuated) is in axial form-fitting engagement with the slot and thus cannot be moved axially to the slot (and thus to the handle).
  • the instrument shaft can preferably have a radial groove (approximately running around the circumference) into which an end region/edge of the guide engages in the unactuated position of the disassembly button (and thereby prevents an axial movement of the instrument shaft (in the direction through the guide)) and is received in a central region/center of the guide in an actuated position (/longitudinally displaced position) of the disassembly button (and thereby releases the axial movement of the instrument shaft (in the direction through the guide)).
  • a radial groove approximately running around the circumference
  • Fig. 1 shows a perspective view of an instrument according to the present disclosure
  • Fig. 2 shows a perspective view of a distal part of the instrument
  • Fig. 3 shows an enlarged perspective view of a proximal part of the instrument
  • Figs. 4 to 11 show a design or receptacle of an insulation jacket of the instrument
  • Fig. 12 shows a longitudinal sectional view of a handle of the instrument
  • Figs. 13 and 14 show longitudinal sectional views of the handle in a fully open and closed position (or actuated and unactuated position) of a tool of the instrument;
  • Figs. 15 and 16 show an overload protection function of the instrument
  • Fig. 17 shows a longitudinal sectional view of the handle of the instrument in a loading position
  • Fig. 18 shows a longitudinal sectional view of a distal end portion of the instrument.
  • Fig. 19 shows a cross-sectional view in the area of a disassembly button of the instrument.
  • Fig. 1 shows a perspective view of a surgical instrument 2 according to the present disclosure.
  • Figs. 2 and 3 show enlarged perspective views of a distal part and a proximal part of the instrument 2, respectively.
  • the instrument 2 is designed in particular as an electrosurgical instrument and is intended for use in minimally invasive surgery or endoscopy, in particular laparoscopy.
  • the instrument 2 is designed in particular as an instrument 2 of the minimally invasive shaft design.
  • the instrument 2 has a distally arranged tool 4, a shaft assembly 6 arranged proximally to the tool 4 and a handle 8 arranged proximally (to the tool 4 and the shaft assembly 6).
  • the tool 4 can be coupled or is coupled to a distal end (/working end) of the shaft assembly 6 and a proximal end (/actuating end) of the shaft assembly 6 can be coupled/coupled or is coupled/coupled distally to the handle 8.
  • Proximal and distal are defined in relation to a surgeon (/operator/operator/user) of the instrument 2.
  • the instrument 2 has the (distally arranged) tool 4.
  • the tool 4 is in particular constructed in several parts and can be constructed, for example, from two scissor-, jaw-, pliers- or tweezers-shaped tool branches (/elements) 10 that can move against/towards each other, in particular pivot relative to each other.
  • the tool branches 10 pivot relative to each other, whereby they open or close.
  • the tool 4 can be used to cut, grip, hold and/or clamp body tissue.
  • the tool branches 10 are in particular pivotably connected to the shaft assembly 6 about a tool pivot axis, so that at least one of the tool branches 10, preferably both tool branches 10, can be pivoted relative to the shaft assembly 6 and thus also relative to the other tool branch 10.
  • the tool pivot axis is in particular aligned transversely or perpendicularly to a distal-proximal direction.
  • the distal-proximal direction corresponds in particular to a longitudinal axis of the shaft assembly 6 (hereinafter referred to merely as a shaft axis).
  • the tool 4 is connected to the shaft assembly 6 in a rotationally coupled manner about its longitudinal axis, so that the tool 4 (as a whole) can be rotated with the shaft assembly 6.
  • the tool 4 is in particular made of a metal, preferably steel.
  • the instrument 2 or the shaft assembly 6 has an instrument shaft (/tube shaft) 12, the longitudinal axis (/tube axis) of which corresponds in particular to the shaft axis.
  • the instrument shaft 12 can preferably be translationally fixed and preferably rotatable about the shaft axis.
  • the tool 4 can be provided with the instrument shaft 12 in such a way that a rotation of the instrument shaft 12 (around the shaft axis) causes (/forces/actuates) a rotation of the tool 4 (around the shaft axis).
  • the tool 4 and the instrument shaft 12 can be connected to one another in a rotationally fixed manner, preferably directly, around the shaft axis.
  • the instrument shaft 12 is in particular made of a metal, preferably steel.
  • the instrument 2 or the shaft assembly 6 has a transmission, preferably a pull/push rod 14 mounted (/received/arranged) inside the instrument shaft 12, the longitudinal axis (/rod axis) of which corresponds in particular to the shaft axis or essentially to the distal-proximal direction.
  • the transmission (/the pull/push rod 14) can be translationally displaceable, preferably axially/longitudinally movable/displaceable, i.e. translationally displaceable along the shaft axis, and preferably rotationally fixed.
  • the tool 4 can be coupled to the transmission (pull/push rod 14) in such a way that a translational movement, in particular a longitudinal movement (along the shaft axis) causes (/forces/actuates) an actuation of the tool 4, in particular a pivoting movement (or opening and closing) of the tool branches 10 (around the tool pivot axis).
  • the tool 4 and the pull/push rod 14 can be connected to one another, preferably via a coupling mechanism.
  • the pull/push rod 14 is in particular made of a metal, preferably steel.
  • the instrument 2 or the shaft assembly 6 has an insulating jacket 16 arranged in particular on the instrument shaft 12, the longitudinal axis (/jacket axis) of which corresponds in particular to the shaft axis.
  • the insulating jacket 16 can be accommodated in an axially/longitudinally movable/displaceable manner, ie translationally displaceable along the shaft axis, and preferably (freely) rotatable manner, in particular relative to the instrument shaft 12 and/or the pull/push rod 14.
  • the insulating jacket 16 is hollow, preferably tubular, and serves for the (radial) external electrical insulation of the instrument shaft 12 and/or the pull/push rod 14, in particular between a distal end region and a proximal end region of the instrument shaft 12 and/or the pull/push rod 14.
  • the insulation jacket 16 is made of a different material to the instrument shaft 12, in particular of a plastic, preferably of PEEK. A design or accommodation of the insulation jacket 16 is described in more detail below.
  • the instrument 2 or the shaft assembly 6 has a cap 18, which is preferably ring-shaped in cross-section and is arranged in particular on the instrument shaft 12.
  • the instrument shaft 12, the pull/push rod 14 and/or the insulation jacket 16 can be guided axially through a (central) opening in the cap 18.
  • the cap 18 can be held firmly in translation and preferably firmly in rotation, in particular relative to the instrument shaft 12.
  • the cap 18 serves as an axial stop for the shaft assembly 6 on the handle 8.
  • the instrument 2 has the (proximally arranged) handle 8.
  • the handle 8 is designed in particular in the manner of a pistol grip or as a pistol handle.
  • the handle 8 has a gear housing 20 which extends in particular from distally in the proximal direction, i.e. in the distal-proximal direction or essentially parallel to/along the shaft axis.
  • the handle 8 has a fixed grip element (/grip part) 21.
  • the grip element 21 extends in particular at an angle, i.e. transversely, to the distal-proximal direction.
  • the grip element 21 can be fixed to a proximal end section of the gear housing 20 or in particular be formed on the gear housing 20, i.e. be integrally connected to the gear housing 20.
  • the gear housing 20 and the grip element 21 are firmly connected to one another.
  • the handle 8 has an actuating lever 22 which is hinged to the gear housing 20 and is in particular finger-guided or finger-guideable.
  • the actuating lever 22 can in particular be actuated manually and has an engagement point for applying an actuating force (by the operator).
  • the actuating lever 22 can have a preferably closed or essentially ring-shaped loop for receiving the operator's fingers (preferably not a thumb), which forms the actuation force application point.
  • the actuation lever 22 can be pivotally mounted.
  • the actuation lever 22 is in particular pivotally connected to the gear housing 20 about an actuation lever pivot axis, so that the actuation lever 22 can be pivoted relative to the gear housing 20, i.e. towards the handle element 21 or away from the handle element 21.
  • the actuation lever pivot axis is in particular transverse or perpendicular to the shaft axis, i.e. the distal-proximal direction.
  • a pivoting movement of the actuation lever 22 (relative to the gear housing 20) is caused (/forced/actuated).
  • the pivoting movement of the actuating lever 22 towards the handle element 21, actuated, for example, by closing one hand of the surgeon/pressing the actuating lever 22 and the handle element 21 together, is referred to below merely as pivoting/pivoting movement in an actuating direction or actuating the actuating lever 22.
  • pivoting movement of the actuating lever 22 away from the handle element 21, actuated, for example, by opening one hand of the surgeon/pressing the actuating lever 22 and the handle element 21 apart is referred to below merely as pivoting/pivoting movement in a resetting direction or resetting the actuating lever 22.
  • the instrument 2 or the handle 8 has a gear 24 which converts the pivoting movement of the actuating lever 22 (actuated by the manual actuation) into a translational movement of the transmission, in particular into a longitudinal movement of the pull/push rod 14.
  • the actuation of the actuating lever 22 actuates the longitudinal movement of the pull/push rod 14 in the pushing direction (or in the pulling direction) and the resetting of the actuating lever 22 actuates the longitudinal movement of the pull/push rod 14 in the pulling direction (or in the pushing direction) (which in turn actuates (or opens or closes) the tool 4
  • the gear 24 can preferably be arranged largely or completely within the gear housing 20 or be covered from the outside by the gear housing 20. A design of the gear 24 is described in more detail below.
  • the instrument 2 or the handle 8 has a rotating star 26, which is arranged in particular at a distal end of the handle 8 and whose longitudinal axis (/star axis) corresponds in particular to the shaft axis.
  • the rotating star 26 can be held, in particular relative to the gear housing 20, preferably translationally fixed and preferably rotatable about the shaft axis.
  • the instrument shaft 12, the pull/push rod 14 and/or the insulation jacket 16 can be guided or can be guided axially through a (central) opening in the rotating star 26.
  • the rotating star 26 can be coupled or can be coupled to the instrument shaft 12 in such a way that a rotation of the rotating star 26 (about the shaft axis) causes (/forces/actuates) the rotation of the instrument shaft 12 (about the shaft axis) (which in turn causes the rotation of the tool 4).
  • the rotary star 26 and the instrument shaft 12 can be connected to one another in a rotationally fixed manner about the shaft axis, preferably directly or via a component (fixedly) connected to the instrument shaft 12.
  • the instrument 2 or the handle 8 has a disassembly button 28, when actuated (pressed) the shaft assembly 6 and the handle 8 can be disassembled, i.e. the shaft assembly 6 can be uncoupled from the handle 8.
  • the design of the disassembly button 28 is described in more detail below.
  • the instrument 2 or the handle 8 has a high-frequency connection, in particular an HF pin 30, through which the tool 4, in particular the tool branches 10, can be subjected to a high-frequency voltage.
  • the HF pin 30 can be held in a preferably translationally fixed and preferably rotationally fixed manner, in particular relative to the gear housing 20.
  • the HF pin 30 can be in contact with the instrument shaft 12 and/or the pull/push rod 14 or can be brought into contact with it in order to transmit the high-frequency voltage through the material of the instrument shaft 12 and/or the pull/push rod 14 to the tool 4.
  • the HF pin 30 can be designed as a bipolar or as a monopolar HF pin.
  • the handle 8 has a locking mechanism 32, by means of which a pivoting position of the actuating lever 22 can be locked in predetermined locking positions.
  • the locking mechanism 32 can be constructed from a locking bracket (fixedly) attached to the handle element 21 and a detent (fixedly) attached to the actuating lever 22.
  • the handle 8 has a button 34 with which the tool 4 can be subjected to the high-frequency voltage.
  • the button 34 can be used to unlock the locking mechanism 32.
  • Fig. 4 shows a longitudinal sectional view of a proximal receptacle of the insulation jacket 16 according to a first embodiment.
  • Fig. 5 shows a longitudinal sectional view of a proximal receptacle of the insulation jacket 16 according to a second embodiment.
  • Figs. 6 and 7 show exploded views of individual parts of the proximal receptacle of the insulation jacket 16 according to the second embodiment.
  • Fig. 8 shows a longitudinal sectional view of a proximal receptacle of the insulation jacket 16 according to a third embodiment.
  • Figs. 9 to 11 show different embodiments of a distal section of the insulation jacket 16 and a distal receptacle of the insulation jacket 16.
  • the insulation jacket 16 is axially displaceable (/freely floating) on the instrument shaft 12.
  • a proximal axial stop 36 is formed on the instrument 2 to limit a proximally directed axial movement (in the direction of the handle 8) of the insulation jacket 16.
  • the proximal axial stop 36 is accommodated/arranged on the instrument shaft 12 in an axially displaceable manner.
  • the proximal axial stop 36 is axially prestressed distally/in a distal direction. This means that the proximal axial stop 36 applies a distally directed axial force to the insulation jacket 16 or the proximal axial stop 36 is pressed distally/in the distal direction by an axial prestress.
  • the insulation jacket 16 is in its assembly position and lies axially against the proximal axial stop 36.
  • the insulation jacket 16 and the instrument shaft 12 When heated, for example when sterilizing the instrument 2 and/or the shaft assembly 6, the insulation jacket 16 and the instrument shaft 12 expand to different extents due to their different thermal expansion coefficients, so that the insulation jacket 16 slips axially on the instrument shaft 12.
  • the proximal axial stop 36 moves in a proximal direction due to the expansion of the insulation jacket 16, whereby the axial preload on the proximal axial stop 36 increases.
  • the insulation jacket 16 cools down again and contracts, the insulation jacket 16 is pushed back into its assembly position by the axial preload of the proximal axial stop 36.
  • Fig. 4 shows a first embodiment of the design of the proximal receptacle of the insulation jacket 16.
  • the proximal axial stop 36 is preferably formed on an annular disk 38 which is received in particular on the instrument shaft 12 (for example, placed/fitted onto an outer circumference of the instrument shaft 12).
  • the axial preload of the proximal axial stop 36 is preferably realized by an axially preloading pressure element, in particular a spring 40, preferably in the form of a helical spring, which is arranged in particular on the instrument shaft 12.
  • the spring 40 can preferably rest directly on the disk 38.
  • the spring 40 can preferably rest directly on the insulation jacket 16, so that an axial end face of the spring 40 forms the proximal axial stop 36.
  • the proximal axial stop 36 (i.e. the disk 38 and/or the spring 40) can preferably be arranged within a capsule-like adapter 42, which is accommodated in particular on the instrument shaft 12.
  • the adapter 42 can serve for the (radial) external electrical insulation of the instrument shaft 12 and/or the pull/push rod 14.
  • the adapter 42 can preferably be connected to the instrument shaft 12 in an axially fixed manner.
  • the adapter 42 can preferably have a distal stop 44 for limiting a distally directed axial movement (in the direction of the tool 4) of the axially displaceable proximal axial stop 36 (ie the disk 38 and/or the spring 40).
  • an axial position of the distal stop 44 preferably be determined depending on a thermal expansion behavior of the insulation jacket 16 and/or the instrument shaft 12.
  • the axial position can be determined such that the insulation jacket 16 in the cooled state axially rests against the proximal axial stop 36 (as well as a distal axial stop 80 described later) (ie that the insulation jacket 16 should not retract further in the distal direction due to its thermal expansion behavior than the proximal axial stop 36 can be pushed in the distal direction due to the distal stop 44).
  • the distal stop 44 can in particular be formed on a section of the adapter 42 that extends radially inwards (in particular further inwards beyond an outer circumference of the proximal axial stop 36/the disk 38).
  • the adapter 42 can preferably have a receiving shell 46 with an insertion opening for (axial) insertion (/sliding in/inserting) of the proximal axial stop 36, in particular the disk 38 and/or the spring 40.
  • the insertion opening can in particular have a larger outer diameter than the proximal axial stop 36, in particular than the disk 38 and/or the spring 40.
  • the insertion opening can preferably be formed on a proximal side of the adapter 42.
  • the receiving shell 46 can preferably form the distal stop 44 directly/integrally.
  • the adapter 42 can preferably have a distal opening 48, which is in particular essentially as large as an outer diameter of the insulation jacket 16 (or slightly larger in order to ensure the axial displaceability of the insulation jacket 16), through which the insulation jacket 16 (as well as the instrument shaft 12 and/or the pull/push rod 14) is or can be guided axially.
  • the distal opening 48 can be formed (directly/integrally) on an inner circumference (/diameter) of the receiving shell 46.
  • Figs. 5 to 7 show a second embodiment of the design of the proximal receptacle of the insulation jacket 16.
  • the proximal receptacle according to the second embodiment can be used universally for (two) insulation jackets 16 of different diameters.
  • the second embodiment differs in particular from the first embodiment in that two proximal axial stops 36 are present.
  • a first proximal axial stop 50 serves to limit the axial movement of the insulation jacket 16 with a first (smaller) diameter
  • a second proximal axial stop 52 serves to limit the axial movement of the insulation jacket 16 with a second (larger) diameter
  • the first proximal axial stop 50 and the second proximal axial stop 52 each having a structure substantially corresponding to the proximal axial stop 36 of the first embodiment.
  • the first or second proximal axial stop 50, 52 is preferably formed on an annular first disk 54 or second disk 56, which is received in particular on the instrument shaft 12 (e.g., placed/fitted onto an outer circumference of the instrument shaft 12).
  • the axial preload of the first or second proximal axial stop 50, 52 is preferably realized by an axially preloading pressure element, in particular a first spring 58 or second spring 60, preferably in the form of a helical spring, arranged in particular on the instrument shaft 12.
  • the first or second spring 58, 60 can preferably rest directly on the first or second disk 54, 56.
  • the first or second spring 58, 60 can preferably rest directly on the first or second insulation jacket 16, so that an axial end face of the first or second spring 58, 60 forms the first or second proximal axial stop 50, 52.
  • Fig. 6 shows an exploded view (viewed from left to right) of the insulation jacket 16 with the first (smaller) diameter, the second disk 56 (forming the second proximal axial stop 52), the second spring 60, the first disk 54 and the first spring 58.
  • Fig. 7 shows an exploded view (viewed from left to right) of the insulation jacket 16 with the second (larger) diameter, the second disk 56 (forming the second proximal axial stop 52), the second spring 60, the first disk 54 and the first spring 58.
  • the first spring 58 and the second spring 60 can have different spring hardnesses.
  • the second spring 60 can have a greater spring hardness than the first spring.
  • the first spring 58 and the second spring 60 may be arranged radially nested/in each other.
  • the first spring 58 may be arranged radially inside the second spring 60.
  • the first disk 54 and the second disk 56 can abut one another axially.
  • the first disk 54 can be arranged proximal to the second disk 56.
  • the first disk 54 and the second disk 56 can have different inner diameters.
  • the distally arranged disk 54, 56, here the second disk 56 can have a larger inner diameter than the proximally arranged disk 54, 56, here the first disk 54, so that the respective insulating jacket 16 can be guided axially through the distally arranged disk 54, 56, here through the second disk 56, for axial contact with the proximally arranged disk 54, 56, here the first disk 54.
  • the distally arranged disk 54, 56 can have a through hole through which the respective insulating jacket 16 can be guided for axial contact with the proximally arranged disk 54, 56.
  • the first or second proximal axial stop 50, 52 (i.e. the first or second disk 54, 56 and/or the first or second spring 58, 60) can preferably be arranged within a capsule-like adapter 62, which is accommodated in particular on the instrument shaft 12.
  • the adapter 62 can serve for the (radial) external electrical insulation of the instrument shaft 12 and/or the pull/push rod 14.
  • the adapter 62 can preferably be connected to the instrument shaft 12 in an axially fixed manner.
  • the adapter 62 can preferably have a distal stop 64 for limiting a distally directed axial movement (in the direction of the tool 4) of the axially displaceable first or second proximal axial stop 50, 52.
  • an axial position of the distal stop 64 can preferably be determined depending on a thermal expansion behavior of the insulation jacket 16 and/or the instrument shaft 12.
  • the axial position can be determined such that the insulation jacket 16 in the cooled state axially rests against the first or second proximal axial stop 50, 52 (as well as a distal axial stop 80 described later) (i.e.
  • the distal stop 64 can in particular be formed on a section of the adapter 62 that extends radially inwards (in particular further inwards beyond an outer circumference of the first or second proximal axial stop 50, 52).
  • the adapter 62 can preferably have a receiving shell 66 with an insertion opening for (axially) inserting (/pushing in/inserting) the first or second proximal axial stop 50, 52, in particular the first or second disk 54, 56 and/or the first or second spring 58, 60.
  • the insertion opening can in particular have a larger outer diameter than the first or second proximal axial stop 50, 52, in particular than the first or second disk 54, 56 and/or the first or second spring 58, 60.
  • the insertion opening can preferably be formed on a distal side of the adapter 62.
  • the adapter 62 can preferably have a distal opening 68, the outer diameter of which is in particular substantially the same as that of the insulation jacket 16 (or slightly larger in order to ensure the axial displacement of the insulation jacket 16), through which the insulation jacket 16 (as well as the instrument shaft 12 and/or the pull/push rod 14) is or can be axially guided.
  • the distal opening 68 can be substantially as large as an outer diameter of the instrument shaft 12 if the insulation jacket 16 reaches through the through hole to contact the distally arranged disk 54, 56, here the first disk 54.
  • the adapter 62 can have a cap 70 which is preferably formed separately from the receiving shell 66 and which can be plugged, in particular screwed, onto the receiving shell 66 from the distal side.
  • the cap 70 can preferably form the distal stop 64 directly/integrally.
  • the adapter 62 can preferably have an axial cover 72 which closes the insertion opening on the receiving shell 66 and forms the distal opening 68 on its inner circumference (/diameter) (directly/integrally).
  • the axial cover 72 can preferably be formed by the first disk 54 or the second disk 56, in particular by the proximally arranged disk 54, 56, here the second disk 56.
  • the distal opening 68 can be formed (directly/integrally) on an inner circumference (/diameter) of the cap 70 if the insulation jacket 16 extends through a through hole in the cap 70 for contacting the distally arranged disk 54, 56, here the first disk 54.
  • Fig. 8 shows a third embodiment of the design of the proximal receptacle of the insulation jacket 16.
  • the proximal receptacle according to the third embodiment can be used universally for (three) insulation jackets 16 of different diameters.
  • the structure of the proximal receptacle according to the third embodiment corresponds essentially to that of the second embodiment.
  • a third proximal axial stop 74 is provided, which is formed by a third disk 76 and is axially preloaded in a distal direction via a third spring 78.
  • the three disks 54, 56, 76 lie axially against one another.
  • the three springs 58, 60, 78 are arranged in a radially nested manner.
  • Figs. 9 to 11 show different embodiments of a distal portion of the insulation jacket 16 and a distal receptacle of the insulation jacket 16.
  • a distal axial stop 80 is formed for limiting a distally directed axial movement (in the direction of the tool 4) of the insulation jacket 16.
  • the distal axial stop 80 can be accommodated axially fixed to the instrument shaft 12, in particular axially fixed to the instrument shaft 12 or formed on the instrument shaft 12.
  • the insulation jacket 16 is with the first (smaller) diameter
  • the insulation jacket 16 is located, the diameter of which differs at its distal end from the second (larger) diameter to the first (smaller) diameter
  • the insulation jacket 16 with the second (larger) diameter rests against the distal axial stop 80.
  • Fig. 12 shows a longitudinal sectional view of the handle 8, which explains the design of the gear 24 in more detail.
  • the gear 24 is designed to transfer the pivoting movement of the actuating lever 22 into the translational movement of the transmission, in particular the longitudinal movement of the pull/push rod 14. This means that the gear 24 couples the pivoting movement of the actuating lever 22 (actuated by manual actuation) with the longitudinal movement of the pull/push rod 14 (and thus (indirectly) with the actuation of the tool 4 or the pivoting movement of the tool branches 10).
  • the actuating lever pivot axis is arranged in particular between the translation axis of the translational movement of the transmission, in particular the shaft axis (i.e. the longitudinal axis of the instrument shaft 12 or the pull/push rod 14), and a proximal end region of the actuating lever 22 (i.e. the actuating force application point for applying the actuating force).
  • the actuating lever pivot axis (when using the instrument 2 in the vertical direction) is located below the shaft axis.
  • the transmission 24 is designed such that a pivoting movement of the actuating lever 22 towards the handle element 21 is transformed into a translational movement of the transmission 14 in the proximal direction. This means that the pivoting movement of the actuating lever 22 towards the handle element 21 (the actuation of the actuating lever 22) is converted into a proximally directed longitudinal movement of the pull/push rod 14 (a pulling movement of the pull/push rod 14).
  • the gear 24 is designed in two or more parts.
  • the gear 24 forms a power transmission line (from the actuating lever 22 to the transmission (pull/push rod 14)).
  • the power transmission cable has a first rotating part (/adjusting lever) 82.
  • the first rotating part 82 is in operative engagement with the actuating lever 22. This means that the pivoting movement of the actuating lever 22 is coupled to a rotation of the first rotating part 82.
  • the first rotating part 82 is pivotally connected to the gear housing 20 about a first axis of rotation.
  • the first axis of rotation is in particular transverse or perpendicular to the shaft axis.
  • the first rotating part 82 is in particular designed separately from the actuating lever 22, but can alternatively also be designed on it (ie on a section of the actuating lever 22), even if this is not shown.
  • the power transmission cable has a second rotating part (/receiving element/closing element) 84.
  • the second rotating part 84 is in operative engagement with the first rotating part 82 with a reversal of the direction of rotation, preferably in toothed engagement. This means that the rotation of the first rotating part 82 is coupled to a rotation of the second rotating part 84, and the first rotating part 82 and the second rotating part 84 rotate in different directions of rotation.
  • the second rotating part 84 is pivotally connected to the gear housing 20 about a second axis of rotation.
  • the second axis of rotation is in particular transverse or perpendicular to the shaft axis.
  • the second axis of rotation is preferably offset parallel to the first axis of rotation.
  • the second rotating part 84 preferably has a coupling section 86 for the transmission (/pull/push rod 14).
  • the coupling section 86 is in particular in operative engagement with the transmission (/pull/push rod 14) or can be brought into operative engagement. This means that the rotation of the second rotary part 84 is or can be coupled via the coupling section 86 to the translational movement of the transmission, in particular the longitudinal movement of the pull/push rod 14.
  • the first rotary part 82 and the second rotary part 84 can have teeth that mesh with one another.
  • the toothing can be designed, for example, as an involute toothing. Due to the toothing engagement, the first rotary part 82 and the second rotary part 84 rotate in different directions of rotation. This has the consequence that the pivoting movement of the actuating lever 22 in the actuating direction controls the longitudinal movement of the pull/push rod 14 in the pulling direction and the pivoting movement of the actuating lever 22 in the return direction controls the Longitudinal movement of the pull/push rod 14 in the thrust direction is caused (/forced/actuated).
  • the instrument shaft 12 in the coupled state can serve as a stop for the pivoting movement of the actuating lever 22, i.e. as a pivoting limit for the actuating lever 22, or as a rotation limit for the first rotating part 82 and the second rotating part 84, or as a translation limit for the transmission, in particular as a longitudinal limit for the pull/push rod 14.
  • the actuating lever 22 can be pivoted (only) within a pivoting range that is preferably limited on both sides, or the first rotating part 82 and the second rotating part 84 can be pivoted (only) within a rotation range that is preferably limited on both sides, or the transmission (/pull/push rod 14) can be moved longitudinally (only) within a translation range (/longitudinal range/working range) that is preferably limited on both sides, i.e. it has a maximum stroke of the longitudinal movement.
  • the stop on the instrument shaft 12 can serve for all coupled (or coupleable) movements.
  • Figs. 13 and 14 show end positions of the translation range/working range of the transmission, in which the tool 4 is completely opened or closed.
  • the gear 24 can have a gear ratio of 1:1.
  • the teeth of the first rotary part 82 and the second rotary part 84 can be arranged on the same diameter.
  • the teeth of the first rotary part 82 and the second rotary part 84 could be arranged on different diameters in order to realize a reduction or a transmission, even if this is not shown.
  • the teeth of the first rotary part 82 and/or the teeth of the second rotary part 84 can be (only) circumferentially sectionally, ie not over an entire circumference.
  • a number of teeth of the first rotary part 82 and/or the second rotary part 84, ie a dimensioning of the circumferential section-wise formation can preferably be determined as a function of the maximum stroke of the longitudinal movement/the limited longitudinal region of the pull/push rod 14.
  • the first rotary part 82 and/or the second rotary part 84 can have two to five teeth, preferably two, three or four teeth.
  • the teeth of the first rotary part 82 and/or the second rotary part 84 could be formed over the entire circumference, even if this is not shown.
  • the coupling section 86 of the second rotary part 84 can be designed as an axially undercut recess 88, into which the transmission (pull/push rod 14) can engage or engages in an axially undercut manner in order to couple the rotation of the second rotary part 84 with the translational movement (longitudinal movement of the pull/push rod 14).
  • the pull/push rod 14 can have a radial thickening (enlarged compared to an axially adjacent region) at its proximal end (end region), in particular in the form of a ball pressure piece 90, which engages in an axially undercut manner in the recess 88 of the second rotary part 84.
  • the gear 24 can have a guide mandrel 92 (rotatably) articulated on the second rotating part 84.
  • the guide mandrel 92 is in particular articulated on the second rotating part 84 so as to be rotatable about a mandrel rotation axis, so that the second rotating part 84 and the guide mandrel 92 can be rotated relative to one another.
  • the mandrel rotation axis is in particular transverse or perpendicular to the shaft axis.
  • the mandrel rotation axis can be offset parallel to the second rotation axis (and/or the first rotation axis).
  • the guide mandrel 92 is longitudinally guided, i.e.
  • the guide mandrel 92 can in particular be offset parallel to the shaft axis.
  • the guide mandrel 92 is received in the gear housing 20 in a spring-loaded manner via a spring 94.
  • the spring preload of the guide pin 92 can counteract the pivoting movement of the actuating lever 22 towards the handle element 21 (ie the actuation).
  • the handle 8 can have an outer handle 96 and an inner handle 98 that is firmly connected to the outer handle 96, for example screwed on.
  • the inner handle 98 can be covered on the outside by the outer handle 96.
  • the second rotating part 84 can be pivotally connected to the inner handle 98.
  • the guide pin 92 can be pivotally connected to the inner handle 98.
  • the guide pin 92 can be longitudinally guided in a recess 100 in the inner handle 98.
  • the transmission 24 has the first rotary part 82, which is particularly (rotatably) articulated to the transmission housing 20, and an elastic overload protection element 102 that couples the pivoting movement of the actuating lever 22 with a rotation of the first rotary part 82 (see also in particular Figs. 15 and 16).
  • the overload protection element 102 is arranged in the force flow/force transmission line between the actuating lever 22 and the first rotary part 82.
  • the overload protection element 102 can in particular be designed as a spring element, preferably as a helical spring.
  • the actuating lever 22 and the first rotary part 82 can be pivotably or rotatably connected to the gear housing 20 about the same axis.
  • the actuating lever pivot axis preferably corresponds to the first rotation axis.
  • the actuating lever 22 can have a recess 104 in which the overload protection element 102 is accommodated.
  • the overload protection element 102 can be arranged completely within the recess 104. This means that the overload protection element 102 is preferably covered on the outside by the actuating lever 22.
  • the overload protection element 102 can be loosely received in the recess 104, ie not firmly connected to the actuating lever 22 and/or the first rotary part 82.
  • the overload protection element 102 can be guided longitudinally, ie (only) displaceable or elastically compressible or bendable along its longitudinal axis in the recess 104.
  • the actuating lever 22 can be pivoted, ie actuated and reset, in the actuating direction, ie in the direction from the actuating lever 22 towards the handle element 21, actuated for example by closing a hand of the operator/pressing the actuating lever 22 and the handle element 21 together, and in the resetting direction, ie in the direction from the actuating lever 22 away from the handle element 21, actuated for example by opening a hand of the operator/pressing the actuating lever 22 and the handle element 21 apart.
  • the overload protection element 102 can preferably be arranged such that it acts (only/exclusively) in the actuation direction (and not in the return direction). This means that the overload protection element 102 only limits/damps/secures/protects against overload the pivoting movement of the actuation lever 22 towards the handle element 21.
  • an actuation transmission surface 106 of the actuation lever 22 and a return transmission surface 108 of the actuation lever 22 can be formed separately from one another, i.e. on different surfaces.
  • the overload protection element 102 can preferably be arranged and dimensioned such that an initial (initially in the sense of actuation, ie starting from the pivoting movement from an unactuated position of the actuating lever 22) force transmission via the overload protection element 102 between the actuating lever 22 and the first rotary part 82 has a substantially linear transmission behavior.
  • the overload protection element 102 can preferably be arranged and dimensioned such that the overload protection element is only compressed when an actuating force of greater than 200 N, preferably greater than 300 N, is applied via the actuating lever 22 (but only when an actuating force of 1000 N is applied via the actuating lever 22).
  • the instrument shaft 12 can be coupled or can be coupled to the handle 8 and, in the coupled state, serve as a stop for the pivoting movement of the actuating lever 22 (and the components coupled thereto in the power transmission train).
  • the instrument shaft 12, in the coupled state serves as a pivoting limit for the actuating lever 22, as well as a translation limit for the transmission or longitudinal limit for the pull/push rod 14, and thus as a travel limit for the tool 4.
  • the instrument shaft 12 can serve as a stop in such a way that decoupling of the transmission (pull/push rod 14) from the gear 24 is only possible when the instrument shaft 12 is decoupled from the handle 8 due to the loss of its stop function. This means that decoupling of the transmission (pull/push rod 14) from the gear 24 is blocked when the instrument shaft 12 is coupled to the handle 8 due to its stop function.
  • the stop formed by the instrument shaft 12 can preferably be designed as an axial stop which limits the translational movement of the transmission (/the longitudinal movement of the pull/push rod 14), in particular on both sides.
  • the stop can be formed in that the transmission (pull/push rod 14) has a pin 110 which is received in a slot 112 on the instrument shaft 12, so that when the pin 110 rests against the slot edge, a further translational movement (in the direction of the slot edge) is prevented (see Fig. 18).
  • the stop can preferably be formed on a distal end region of the instrument shaft 12.
  • the gear 24 can have the second rotary part 84 which is operatively connected to the actuating lever 22 and whose rotation can be coupled or is coupled to the translational movement of the transmission (/the longitudinal movement of the pull/push rod 14) via a (first) axial positive connection.
  • the first axial positive connection is formed in particular by the axially undercut recess 88 in the second rotary part 84, into which the transmission, in particular the ball pressure piece 90 of the pull/push rod 14 (in the coupled state of the instrument shaft 12 and thus of the pull/push rod 14) engages in an axially undercutting manner.
  • the transmission (pull-push rod 14) can be translationally displaceable, in particular longitudinally movable, in the decoupled state of the instrument shaft 12 and (due to the coupling between the transmission and the second rotating part 84 or the gear 24) in particular the second rotating part 84 can be rotated in the decoupled state of the instrument shaft (12) to such an extent that the axial form-fitting connection between the transmission and the second rotating part 84 can be released.
  • This position of the second rotating part 84 is also referred to below as a disassembly position of the second rotating part 84 or as the loading position of the instrument 2 (see in particular Fig. 17).
  • the transmission (pull-push rod 14) (together with the instrument shaft 12 or the entire shaft assembly 6) can be pulled in the distal direction (out of the handle 8).
  • the second rotary part 84 can be accommodated in the handle 8, in particular the gear housing 20, in a spring-loaded manner.
  • a spring preload of the second rotary part 84 presses the second rotary part 84 into the disassembly position in which the first axial positive connection between the transmission (pull/push rod 14) and the second rotary part 84 can be released.
  • the spring preload can be implemented in particular via the spring 94 preloading the guide pin 92.
  • the disassembly position can in particular correspond to an unactuated, overstretched position of the actuating lever 22, ie a position in which the actuating lever 22 is positioned further away from the handle element 21 than in the unactuated position.
  • the instrument shaft 12 can be axially fixedly coupled to the handle 8 in the coupled state and can be axially displaceable relative to the handle 8 in the uncoupled state. This means that a coupling between the instrument shaft 12 and the handle 8 corresponds in particular to an axially fixed connection.
  • the instrument 2 or the handle 8 can preferably have the disassembly button 28, when actuated (/pressed) the shaft assembly 6/the instrument shaft 12 and the handle 8 can be disassembled, i.e. the shaft assembly 6/the instrument shaft 12 can be uncoupled from the handle 8.
  • the disassembly button 28 can in particular be actuated manually. By actuating the disassembly button 28, the instrument shaft 12 can be axially decoupled from the handle 8. This means that the disassembly button 28 can block an axial displacement of the instrument shaft 12 relative to the handle 8.
  • the instrument shaft 12 and the handle can be freely axially displaced relative to one another when the disassembly button 28 is actuated and can be or be axially connected to one another when the disassembly button 28 is not actuated.
  • the disassembly button 28 can have a (longitudinally) displaceable closing slide 114 accommodated in the handle 8, the longitudinal axis of which corresponds in particular to a radial direction of the instrument shaft 12.
  • the closing slide 114 can preferably be coupled or coupled to the instrument shaft 12 via a second axial form-fitting connection.
  • the second The axial form-fitting connection should preferably be releasable by a (longitudinal) displacement of the disassembly button 28 (relative to the handle 8).
  • the closing slide 114 can be accommodated in the handle in a spring-loaded manner.
  • the (second) axial positive connection can preferably be releasable against a spring preload of the closing slide 114. This means that a spring preload of a spring 116 presses the closing slide 114 into an unactuated position or into axial positive engagement with the instrument shaft 12.
  • the second axial positive connection can be formed by a slot-like slot 118 formed in the closing slide 114, with which the instrument shaft 12 (when the disassembly button 28 is actuated) is out of axial positive engagement and can thus be guided axially through the slot 118 and (when the disassembly button 28 is not actuated) is in axial positive engagement and thus cannot be moved axially to the slot 118 (and thus to the handle 8).
  • the instrument shaft 12 can preferably have a radial groove 120 (approximately running around the circumference) into which an end region/edge of the guide rail 118 engages in the unactuated position of the disassembly button 28 (and thereby prevents an axial movement of the instrument shaft 12 (in the direction through the guide rail)) and is received in a central region/center of the guide rail 118 in an actuated position (/longitudinally displaced position) of the disassembly button 28 (see Fig. 19).
  • a radial groove 120 approximately running around the circumference
  • an end region/edge of the guide rail 118 engages in the unactuated position of the disassembly button 28 (and thereby prevents an axial movement of the instrument shaft 12 (in the direction through the guide rail)) and is received in a central region/center of the guide rail 118 in an actuated position (/longitudinally displaced position) of the disassembly button 28 (see Fig. 19).

Landscapes

  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Public Health (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Veterinary Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Physics & Mathematics (AREA)
  • Otolaryngology (AREA)
  • Plasma & Fusion (AREA)
  • Ophthalmology & Optometry (AREA)
  • Surgical Instruments (AREA)

Abstract

La présente invention se rapporte à un instrument chirurgical (2), en particulier un instrument électrochirurgical (2) ayant une conception d'arbre minimalement invasive. Lorsqu'il est accouplé à une poignée (8), un arbre d'instrument (12) agit comme une butée pour un mouvement de pivotement d'un levier d'actionnement (22) de telle sorte que le découplage d'une transmission d'un engrenage (24) n'est possible que lorsque l'arbre d'instrument (12) est découplé de la poignée (8) à la suite de l'arrêt de sa fonction de butée.
PCT/EP2024/073306 2023-08-22 2024-08-20 Mécanisme de désassemblage entre une unité d'arbre et une poignée Pending WO2025040662A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP24759101.9A EP4572687A1 (fr) 2023-08-22 2024-08-20 Mécanisme de désassemblage entre une unité d'arbre et une poignée

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023122453.0 2023-08-22
DE102023122453.0A DE102023122453A1 (de) 2023-08-22 2023-08-22 Demontagemechanismus zwischen Schaftbaugruppe und Handgriff

Publications (1)

Publication Number Publication Date
WO2025040662A1 true WO2025040662A1 (fr) 2025-02-27

Family

ID=92503815

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/073306 Pending WO2025040662A1 (fr) 2023-08-22 2024-08-20 Mécanisme de désassemblage entre une unité d'arbre et une poignée

Country Status (3)

Country Link
EP (1) EP4572687A1 (fr)
DE (1) DE102023122453A1 (fr)
WO (1) WO2025040662A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20311293U1 (de) * 2003-07-23 2003-09-18 Aesculap AG & Co. KG, 78532 Tuttlingen Chirurgisches Rohrschaftinstrument
DE10224190B3 (de) * 2002-05-31 2004-01-22 Richard Wolf Gmbh Medizinische Zange
AU2007221906B1 (en) * 2007-10-09 2008-10-23 John Silady Control System for A Grasping Instrument
US20090299141A1 (en) * 2008-04-25 2009-12-03 Downey Earl C Laparoscopic Surgical Instrument
US20130304041A1 (en) 2012-04-18 2013-11-14 Robin Merz Handling device for a medical instrument
DE202014004160U1 (de) * 2014-05-20 2014-06-18 Bacher Medizintechnik GmbH Rohrschaftinstrument
US20140180263A1 (en) * 2012-12-20 2014-06-26 Earl C. Downey Surgical Instrument
EP3033022A1 (fr) 2014-11-04 2016-06-22 Aesculap AG Instrument chirurgical bipolaire comportant une poignée à usages multiples et outil à usage unique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3709067A1 (de) * 1987-03-19 1988-09-29 Ewald Hensler Medizinisches, insbesondere chirurgisches instrument
DE102007063302B3 (de) * 2007-12-27 2009-04-09 Olympus Winter & Ibe Gmbh Chirurgische Zange mit Schraubenfeder

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10224190B3 (de) * 2002-05-31 2004-01-22 Richard Wolf Gmbh Medizinische Zange
DE20311293U1 (de) * 2003-07-23 2003-09-18 Aesculap AG & Co. KG, 78532 Tuttlingen Chirurgisches Rohrschaftinstrument
AU2007221906B1 (en) * 2007-10-09 2008-10-23 John Silady Control System for A Grasping Instrument
US20090299141A1 (en) * 2008-04-25 2009-12-03 Downey Earl C Laparoscopic Surgical Instrument
US20130304041A1 (en) 2012-04-18 2013-11-14 Robin Merz Handling device for a medical instrument
US10548577B2 (en) * 2012-04-18 2020-02-04 Karl Storz Se & Co. Kg Handling device for a medical instrument
US20140180263A1 (en) * 2012-12-20 2014-06-26 Earl C. Downey Surgical Instrument
DE202014004160U1 (de) * 2014-05-20 2014-06-18 Bacher Medizintechnik GmbH Rohrschaftinstrument
EP3033022A1 (fr) 2014-11-04 2016-06-22 Aesculap AG Instrument chirurgical bipolaire comportant une poignée à usages multiples et outil à usage unique

Also Published As

Publication number Publication date
DE102023122453A1 (de) 2025-02-27
EP4572687A1 (fr) 2025-06-25

Similar Documents

Publication Publication Date Title
EP1043955B1 (fr) Pince medicale comportant deux elements a machoires deplacables independamment l'un de l'autre
WO2000038581A1 (fr) Poignee pour un instrument medical a tige creuse
EP1054636A1 (fr) Poignee pour instrument medical
WO2000003650A1 (fr) Tournevis medical
DE102008015418A1 (de) Medizinisches Instrument
DE102013101651A1 (de) Endoskopisches Instrument sowie Schaft für ein endoskopisches Instrument
EP2364655B1 (fr) Instrument médical
EP3100690A1 (fr) Instrument pour la chirurgie endoscopique
EP1701661B1 (fr) Instrument medical de decoupage et/ou de maintien
EP1629785B1 (fr) Pince médicale
DE102010033424B4 (de) Endoskopisches Instrument
EP4565151B1 (fr) Poignée en forme de pistolet chirurgical, et instrument chirurgical ayant une poignée en forme de pistolet
WO2025040662A1 (fr) Mécanisme de désassemblage entre une unité d'arbre et une poignée
EP4561480B1 (fr) Ensemble tige chirurgicale et instrument chirurgical comprenant un ensemble tige
WO2025040663A1 (fr) Poignée de pistolet chirurgical et instrument chirurgical comprenant une poignée de pistolet
DE9105399U1 (de) Extraktor
EP1365691B1 (fr) Instrument medical
DE102023122472A1 (de) Chirurgische Schaftbaugruppe sowie chirurgisches Instrument mit Schaftbaugruppe
DE102012110260B4 (de) Betätigungsgriff für ein mikrochirurgisches Instrument
EP3503820B1 (fr) Instrument chirurgical à mâchoires comprenant un système de levier monobras
DE202007000427U1 (de) Chirurgischer Haltegriff und chirurgisches Instrument
DE102011081344B4 (de) Koagulationsinstrument
DE102023136224A1 (de) Betätigungseinrichtung für ein medizinisches Instrument und medizinisches Instrument umfassend eine solche Betätigungseinrichtung
WO2025119962A1 (fr) Instrument chirurgical minimalement invasif
DE102007001752B4 (de) Chirurgischer Handgriff und chirurgisches Instrument

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 2024759101

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2024759101

Country of ref document: EP

Effective date: 20250321

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24759101

Country of ref document: EP

Kind code of ref document: A1

WWP Wipo information: published in national office

Ref document number: 2024759101

Country of ref document: EP