Surgical forceps tool, surgical instrument and production method

Abstract

The present invention relates to a surgical forceps tool (1), a surgical instrument (10), a forceps tool (1) and a method for the production thereof. The surgical forceps tool (1) has two jaw parts (2, 2'), an actuation element (3), which defines a longitudinal axis (L), and a fork holder (4) having two arm portions (50) and at least one tube portion (60) through which the actuation element (3) extends for engagement with the two jaw parts (2, 2'), which are mounted between the two arm portions (50) so as to be movable about a pivot axis (S) in each case. Each jaw part (2, 2') has, on an actuation portion (20), a pivot pin (21) which is received in a pivot recess (52), formed on the arm portion (50), in order to form the pivot axis (S), and has a coupling opening (22) in which one of two drive pins (32, 32') formed on a distal end portion (30) of the actuation element (3) is received. Each jaw part (2, 2') has a guide pin (23) and each arm portion (50) has a guide track (53), concentric with respect to the pivot recess (52), for guiding the guide pin (23), the distance of which from the pivot pin (21) corresponds to a distance of the guide track (53) from the pivot recess (52). The fork holder (4) is formed in a joining arrangement, wherein each fork arm (5) has a joining portion (51), and the fork body (6) has two contact portions (61, 61') which are connected to the joining portions (51) of the fork arms (5) in the joining arrangement.

Description

[0001] KARL STORZ SE & Co. KG - 1 - 2023P00216WG

[0002] KARL STORZ SE & Co. KG 2023P00216WÖ

[0003] Dr.-Karl-Storz-Straße 34

[0004] 78532 Tuttlingen

[0005] Germany

[0006] Surgical jaw tool, surgical instrument and manufacturing process

[0007] The invention relates to a surgical jaw tool, a surgical instrument with a jaw tool and a method for manufacturing the surgical jaw tool.

[0008] It is known from the prior art to use surgical instruments with a jaw-type tool consisting of movable jaws, such as dissecting forceps, grasping forceps, and scissors, which, depending on the shape and size of the jaws, have a dissecting, grasping, or cutting function. The jaw-type tool is designed to be arranged on the distal end of an outer shaft, which is connected at its proximal end to an actuating device (e.g., a handle or robotic grip). For opening and closing the jaws, the jaw-type tool has a jaw mechanism that is connected to the actuating device via an actuating element extending through the outer shaft. The jaw mechanism includes at least one joint that provides an axis of movement about which at least one of the two jaws can be moved.A distinction is made between one-sided opening jaw tools, in which only one jaw part is moved, and two-sided opening jaw tools, in which both jaw parts are moved.

[0009] DE 10 2006 028 001 B4 describes a surgical grasping forceps with two gripping jaws, each movably mounted on a forked base body about a pivot axis. The base body has two fork arm sections extending from a tube section through which an actuating element for engaging the gripping jaws extends. Each pivot axis is provided by a pivot pin formed on the gripping jaw, which is received in a recess on the fork arm section of the base body. Furthermore, each gripping jaw has a coupling opening for engaging with a drive pin formed on the actuating element. KARL STORZ SE & Co. KG - 2 - 2023P00216WG

[0010] Between the pivot pin and the coupling opening, there is a crescent-shaped guide recess on each gripping jaw, through which a guide bolt, fixed in both fork arm sections, is guided.

[0011] EP 3 772 323 B1 relates to an endoscopic device with a deflectable section consisting of several connecting elements arranged in series. The deflection is adjusted by means of a flexible control cable. Radially arranged guides on the connecting elements serve to guide the control cable.

[0012] EP 1 683 496 B1 discloses an electrosurgical instrument for closing tissue. A stop ensures a minimum distance between the two movable jaw parts.

[0013] Based on this state of the art, the object of the present invention is to provide an alternative surgical jaw tool with comparable functionality and easy assembly without a through guide pin.

[0014] This problem is solved by a surgical jaw tool having the features of claim 1.

[0015] The provision of a suitably modified surgical instrument is solved by the surgical instrument having the features of claim 11.

[0016] The further task of providing a simple assembly of the surgical jaw tool is solved by the method with the features of independent claim 12.

[0017] Preferred embodiments are described in the dependent claims.

[0018] According to a first embodiment, the surgical jaw tool comprises two jaws, an actuating element defining a longitudinal axis, and a fork-shaped support. This support has two arm sections and at least one tube section through which the actuating element extends for engagement with the two jaws, which are movably mounted between the two arm sections about a pivot axis. Each jaw has a pivot pin on an actuating section, which is received in a pivot recess formed on the arm section to form the pivot axis. Furthermore, each jaw has a coupling opening on the actuating section in which one of two drive pins formed on a distal end section of the actuating element is received. According to the invention, each jaw has a guide pin, and each arm section has a guide track concentric to the pivot recess for guiding the guide pin.The distance between the guide pin and the pivot pin corresponds to the distance between the guide track and the pivot recess. The fork mount is formed from two fork arms, each having arm sections, and a fork body, which has the tube section, in a joining arrangement. Each fork arm has a joining section, and the fork body has two contact sections that are connected to the joining sections of the fork arms in the joining arrangement. KARL STORZ SE & Co. KG - 3 - 2023P00216WG.

[0019] In this way, the surgical jaw tool is assembled by joining the fork arms to the fork body to form the fork mount. The resulting surgical jaw tool thus achieves comparable functionality without the need for an additional guide pin.

[0020] Furthermore, no guide recesses are required in the jaw parts, as the guide track formed in the arm section of the fork bracket provides the stop to limit the opening space of the jaw parts.

[0021] In a further embodiment of the surgical jaw tool according to the invention, the contact sections are located diametrically opposite the tube section of the fork body. Furthermore, the contact sections of the fork body and the joining sections of the fork arms are designed to align the arm sections parallel to an axis of rotation of the tube section. As a result, the arm sections in the joining arrangement extend diametrically opposite the tube section and parallel with respect to the longitudinal axis.

[0022] In yet another embodiment of the surgical jaw tool according to the invention, each contact section on the tubular section of the fork body is formed by a recess extending towards its distal end. The joining section of each fork arm is designed to be complementary to this recess, with the joining section flushly complementing a cylindrical shape of the tubular section in the joining arrangement. For this purpose, the recess on the tubular section forming the contact section and the joining section complementing the recess can preferably be cylindrical segments. This results in the joining sections and the contact sections having flat contact surfaces extending parallel to the longitudinal axis.

[0023] Furthermore, in a surgical jaw tool according to a further embodiment, the joining sections of the fork arms can be connected to the contact sections of the fork body in the joining arrangement to form the fork holder by a positive locking connection, a material locking connection, a force locking connection or a combination thereof.

[0024] For a positive-locking connection, the joining section and the mating section have an interlocking shape. For this purpose, at least one forming element is present on each joining section, and at least one counter-forming element is present on each mating section, complementary to the forming element. A material-locking connection is a welded, soldered, or adhesive bond. A friction-locking connection has at least one retaining element that holds the joining section to the mating section and is selected from a group that includes at least rivets, screws, sleeves, spring clips, and retaining clips.

[0025] Examples of combinations of connection types include a positive-lock connection with a material-lock connection, a positive-lock connection with a force-lock connection, and a force-lock connection with a material-lock connection. Positive-lock connections and material-lock connections are preferred because they do not require additional connecting elements. KARL STORZ SE & Co. KG - 4 - 2023P00216WG

[0026] A positive-lock connection works through the interlocking pair of mating elements, which act as interlocking connecting partners with mutually contacting surfaces across which normal forces are transmitted. In this direction, each connecting partner blocks the movement of the other. In the joining direction of the connecting partners, i.e., parallel to the contact surfaces, positive-lock connections are generally detachable. In a material-locked connection, cohesive and adhesive forces prevent any movement between the connecting partners, which are therefore permanently joined. A friction-locked connection, also called a force-locked connection, prevents the movement of the connecting partners through a mechanical connecting element that applies a normal force to the connecting surfaces and holds the connecting partners together through static friction.

[0027] Advantageously, in a preferred embodiment of the surgical jaw tool according to the invention, a positive locking connection can also be used to align the arm sections parallel to the longitudinal axis. Unintentional loosening of the positive locking connection in the joining direction can be prevented by combining it with a material or force-fit connection.

[0028] According to a further development of the surgical jaw tool according to the invention, whose fork holder is obtained by a positive-locking connection, two or more forming elements can be formed on each joining section. Correspondingly, two or more counter-forming elements are then formed on each contact section, which are designed to be complementary to the two or more forming elements of the joining section. Additionally or alternatively, according to a further embodiment of the surgical jaw tool according to the invention, the forming element on the joining section can be an elongated hole and the counter-forming element on the contact section can be a keyway profile.

[0029] A slot is understood to be an elongated through-hole or groove whose longitudinal sides run parallel to each other. The narrow sides of the slot are preferably rounded, with a radius (circular diameter or elliptical major or minor axis) corresponding to the width of the slot. Alternatively, the narrow sides of the slot can be straight, resulting in a rectangular or trapezoidal slot. It is also conceivable that the narrow sides of the slot are angular, giving the slot a hexagonal or polygonal shape with concave or convex narrow sides. The key element is designed for positive engagement within the slot and therefore has an elongated body with parallel longitudinal sides. The key element can be cuboid or cuboid-like, with its narrow sides rounded, straight, or angular to match the narrow sides of the slot.Each positive-locking pair consisting of a slotted hole and a keyway can be configured with its longitudinal sides, for example, parallel or perpendicular to the longitudinal axis at the respective joining and contact sections. If two or more positive-locking pairs consisting of a slotted hole and a keyway are provided at each joining and contact section, one positive-locking pair can be oriented parallel to the longitudinal axis and another perpendicular to the longitudinal axis.

[0030] According to a further embodiment of the surgical jaw tool according to the invention, the

[0031] The form elements at the joining sections of the two fork arms are designed identically and the KARL STORZ SE & Co. KG - 5 - 2023P00216WG

[0032] The attachment sections are rotationally symmetrical with the mating elements of the fork body. Since the joining sections of the fork arms have the same forming elements, the fork arms can be joined to the attachment sections, which are rotationally symmetrical with respect to the longitudinal axis, in any order during assembly.

[0033] Furthermore, according to a further embodiment of the surgical jaw tool according to the invention, it can be provided that the fork body has a stepped coupling section with a reduced diameter on the proximal side of the tube section and / or at least one coupling element designed for connection with an outer shaft in which the actuating element can be arranged to be longitudinally movable.

[0034] A connection between the fork body, or fork mount, and an outer shaft can, for example, include receiving the coupling section in a distal end or coupling section of the outer shaft, with the coupling section resting against the shoulder of the tube section. The reduced (outer) diameter of the coupling section is adapted to the inner diameter of the outer shaft coupling section.

[0035] Alternatively or additionally, coupling elements can be used to connect the fork body to the outer shaft, which may have corresponding coupling elements for engagement with these coupling elements. Examples of coupling elements include a thread or bayonet lug that can be engaged with a mating thread or bayonet groove. Typically, a manual or robotic actuating device is located at the proximal end of the outer shaft, forming a surgical instrument with the distal surgical jaw. The actuating element is connected to the actuating device for operating the jaws.

[0036] Furthermore, according to another embodiment of the invention, the surgical jaw tool can have a retaining sleeve as a retaining element with a distal and a proximal retaining section. The distal retaining section surrounds the tube section in the joining arrangement, and the proximal retaining section is designed to receive the distal coupling section of the fork body with the coupling section arranged therein in a connection arrangement between the fork body and the outer shaft. The distal retaining section of the retaining sleeve is formed on the tube section of the fork body, and the proximal retaining section on the distal coupling section of the outer shaft. That is, the length and inner diameter of the distal retaining section of the retaining sleeve are adapted to the length and outer diameter of the tube section, and the length and inner diameter of the proximal retaining section are adapted to the length and outer diameter of the distal coupling section of the outer shaft.The proximal holding section is radially offset from the distal holding section of the holding sleeve, i.e., it has a reduced outer diameter.

[0037] According to a further embodiment, the surgical jaw tool according to the invention can have a connecting sleeve that secures the connection between the fork holder and the outer shaft. For this purpose, the connecting sleeve has a connecting element on a proximal connecting section, which is designed to connect to a connecting element of the outer shaft arranged proximally to the coupling element KARL STORZ SE & Co. KG - 6 - 2023P00216WG. Distally, the connecting sleeve abuts a radial shoulder of the fork arms, which is formed between the arm section and the connecting section. The cylindrical outer surface of the connecting sleeve then abuts flush with the partially cylindrical outer surface of the arm sections of the tube section. The proximal connecting section is radially offset from the distal stop section of the connecting sleeve, i.e., it has a reduced outer diameter.

[0038] An exemplary embodiment relates to the fact that the surgical jaw tool according to the invention can have both a retaining sleeve, which holds the joining arrangement together by frictional locking and surrounds the coupling arrangement of the fork body with the outer shaft, and a connecting sleeve, which surrounds the retaining sleeve and projects beyond it on both sides to secure the connection of the fork holder with the outer shaft. An inner contour of the connecting sleeve is adapted to the outer contour of the retaining sleeve, wherein the inner contour of the connecting sleeve in the distal stop section is formed with a radial inner shoulder against which the retaining sleeve bears with the shoulder between the proximal and distal retaining sections.

[0039] In yet another embodiment of the surgical jaw tool according to the invention, the drive pins on the distal end section of the actuating element are spaced radially from the longitudinal axis and are rotationally symmetrical. This allows for identical design of the jaw sections, at least with respect to the coupling opening on the actuating section. Preferably, the jaw sections can also be identical with respect to the pivot and guide pin on the actuating section. Depending on the function of the jaw tool and the design of the working surfaces for preparing, grasping, or cutting, it is even possible for both jaw sections to be completely identical, i.e., not only the actuating section but also the working section.

[0040] Alternatively, the jaw sections can differ with respect to their working area; for example, the working areas can be designed to be mirror images of each other. With the actuating sections of the jaw sections being designed identically, the arm sections of the fork arms, or even the entire fork arms, can also be designed identically with respect to the guide track and pivot recess. This makes the assembly of the jaw tool particularly easy, as each fork arm is suitable for supporting both jaw sections and each coupling pin is suitable for engaging both jaw sections.

[0041] According to a further embodiment of the surgical jaw tool according to the invention, a rod section of the actuating element, which connects to the distal end section and extends through the fork body, has a cross-sectional profile that deviates from a circular shape and is guided in a rotationally secure manner between the arm sections, which provide a corresponding partial profile deviating from the circular shape on their inwardly facing side.

[0042] A surgical instrument according to the invention also comprises a surgical jaw tool according to one of the previously described embodiments of the invention, with two jaws, an actuating element, and a fork holder. The actuating element extends through the fork holder to engage with the two jaws, in which the two jaws are pivotably mounted about at least one pivot axis. The fork holder is arranged at a distal end of an outer shaft through which the actuating element extends longitudinally and engages with an actuating device arranged at a proximal end of the outer shaft.

[0043] A method according to the invention for manufacturing a surgical jaw tool according to the invention comprises, according to a first embodiment, at least the following steps S1) to S6):

[0044] 51) Providing an assembly kit comprising the two jaw parts, the actuating element, the two fork arms and the fork body;

[0045] 52) Mounting one of the first of the two jaw parts on one of the first of the two fork arms, receiving the pivot pin in the pivot recess and receiving the guide pin in the guide track;

[0046] 53) Engaging the actuating element inserted into the fork body with the first jaw part by receiving one of the two drive pins formed on the distal end section in the coupling opening of the first jaw part, and

[0047] Arranging the first fork arm with the joining section on one of the first of the two mounting sections of the fork body;

[0048] 54) Engaging a second of the two jaw parts with the actuating element by receiving a second of the two drive pins formed on the end section in the coupling opening of the second jaw part; and

[0049] 55) Arranging the second of the two fork arms under the support of the second jaw part by receiving the pivot pin in the pivot recess and receiving the guide pin in the guide track, and

[0050] Arranging the second fork arm with the joining section on a second of the two mounting sections of the fork body;

[0051] 56) Forming the fork holder from the two fork arms and the fork body in the joining arrangement by connecting the first joining section to the first attachment section and the second joining section to the second attachment section, and obtaining the surgical jaw tool.

[0052] A further development of the method according to the invention relates to the insertion of the actuating element into the tube section of the fork body or the insertion of the rod section of the actuating element into the tube section of the fork body preferably takes place with the provision of the assembly set in step S1 or possibly before step S3.

[0053] Furthermore, an embodiment of the inventive method for forming the fork holder in step S6 can provide that the joining of the first joining section with the first attachment section alternatively takes place directly after step S3.

[0054] According to a preferred embodiment, the inventive method for providing the assembly set in step S1 comprises that the joining sections of the fork arms are formed with at least one forming element and the two contact sections of the fork body with at least one counter-forming element KARL STORZ SE & Co. KG - 8 - 2023P00216WG, which is shaped complementarily to the forming element of the joining section in order to form a positive-locking connection in the joining arrangement. The arrangement of the fork arms with the joining sections on the contact sections of the fork body in steps S3 and S5 then comprises creating a positive-locking connection by interlocking the forming and counter-forming elements.

[0055] Alternatively, or preferably in addition to the positive-locking connection, the joining of the two fork arms to the fork body in the assembly in step S6 to form the fork bracket further comprises a material-locking and / or friction-locking connection. The material-locking connection can be achieved by welding, brazing, or bonding the joining edges between the joining sections and the contact sections. Optionally, the surface of the fork bracket can then be ground, at least at the material-locked edges, to achieve a homogeneous appearance. The friction-locking connection can, for example, include the arrangement of a retaining sleeve to secure the assembly between the joining sections of the fork arms and the contact sections of the fork body.

[0056] Further embodiments, as well as some of the advantages associated with these and other embodiments, will become clearer and more easily understood through the following detailed description with reference to the accompanying figures. Objects or parts thereof that are essentially the same or similar may be provided with the same reference numerals. The figures are merely a schematic representation of one embodiment of the invention. The drawings, the description, and the claims contain numerous features in combination. It is understood that the features mentioned above and those to be explained below can be used not only in the combinations specified, but also in other combinations or individually, without departing from the scope of the present invention.

[0057] This shows:

[0058] Fig. 1 shows a perspective view of a surgical jaw tool according to an embodiment of the invention at the distal shaft end of a surgical instrument.

[0059] Fig. 2 shows a side view of a surgical instrument with a jaw-type tool according to an embodiment of the invention.

[0060] Fig. 3 shows a perspective view of a fork arm of an assembly set for the surgical jaw tool from Fig. 1.

[0061] Fig. 4 shows a perspective view of a jaw part of an assembly set for the surgical jaw tool from Fig. 1.

[0062] Fig. 5 shows a perspective view of a fork body of an assembly set for the surgical jaw tool from Fig. 1.

[0063] Fig. 6 shows a perspective view of a distal end section of an actuating element for the surgical jaw tool from Fig. 1.

[0064] Fig. 7 is a perspective view of an arrangement obtained by step S2 consisting of a first fork arm according to Fig. 3 and a first jaw part according to Fig. 4, KARL STORZ SE & Co. KG - 9 - 2023P00216WG

[0065] Fig. 8 shows a perspective view of an arrangement following Fig. 7 by step S3, with a fork body according to Fig. 5 and an actuating element according to Fig. 6.

[0066] Fig. 9 shows a perspective view of an arrangement following Fig. 8 by step S4 with a second jaw part according to Fig. 4.

[0067] Fig. 10 shows a perspective view of an arrangement following Fig. 9 by step S5 with a second fork arm according to Fig. 3,

[0068] Fig. 11 is a perspective view of the surgical jaw tool from Fig. 10 in a connection arrangement with an outer shaft of a surgical instrument; Fig. 12 is a perspective view corresponding to Fig. 11 in an embodiment with a locking sleeve.

[0069] Fig. 13 shows a perspective view corresponding to Fig. 12 in an embodiment with a connecting sleeve.

[0070] The invention relates to a surgical jaw tool and a method for its assembly. The invention also relates to a surgical instrument equipped with such a surgical jaw tool. The joint mechanism of the surgical jaw tool is suitable for monopolar or non-electromagnetic forceps systems for dissecting, grasping, or cutting. The joint mechanism operates without joint components that project laterally or radially beyond a diameter defined by the fork holder of the jaw tool or by the outer shaft of the surgical instrument.

[0071] Fig. 1 shows a surgical jaw tool 1 according to the invention, which, as can be seen in Fig. 2, is arranged at the distal end of an outer shaft 7. The surgical jaw tool 1 has two jaw sections 2, 2', each of which is movably mounted about a pivot axis S between two arm sections 50 of a fork-shaped holder 4. The coupling point of the fork-shaped holder 4 with the outer shaft 7 is concealed in Fig. 1 by a connecting sleeve 8, to which the arm sections 50 of the fork-shaped holder 4 extend distally and a sealing sleeve 7' of the outer shaft 7 connects proximally. At its proximal end, the outer shaft 7 is connected to an actuating device 9, here a handle 9. The actuating device 9 engages with an actuating element 3, which defines a longitudinal axis L and extends longitudinally through the outer shaft 7 into the fork-shaped holder 4.The actuating element 3 engages with the jaw parts 2, 2', so that an actuating movement or force generated at the actuating device 9 is transmitted by the actuating element 3 to the jaw parts 2, 2' for opening and closing. The surgical jaw tool 1 shown here is a grasping forceps, whose jaw parts 2, 2' are designed with working sections 24 for grasping objects or tissue.

[0072] Unlike in the prior art, the joint mechanism here does not require a through-bolt, so the arm sections 50 of the fork bracket 4 do not have a through-hole that interrupts the outer surface of the fork bracket and is required in the prior art for arranging the guide bolt. In contrast, the closed outer surface of the fork bracket 4 ensures that no joint components can protrude beyond the outer surface. KARL STORZ SE & Co. KG - 10 - 2023P00216WG

[0073] Despite omitting the through guide pin from the prior art, the surgical jaw tool 1 exhibits the same functionalities, including securing the jaw sections 2, 2' against falling out after assembly and implementing an open stop to limit the opening angle of the jaw sections 2, 2'. This is achieved by using a multi-part fork holder 4 consisting of two fork arms 5 and a fork support 6, an example of which is shown in Figures 3 and 5. Both fork arms 5 are identical. Each fork arm 5 provides not only a pivotable bearing for one of the jaw sections 2, 2', but also a pin track control.

[0074] Fig. 4 shows a first jaw part 2, which differs from the second jaw part 2' in Fig. 1 with respect to the geometry of the working section 24. The working sections 24 of the two jaw parts 2, 2' are mirror-symmetrical. This means that the working section 24 of the first jaw part 2, when reflected across a plane through or parallel to the longitudinal axis L, yields the working section 24 of the second jaw part 2'. The actuating sections 20 of both jaw parts 2, 2' for pivoting, however, are identical. This implies a rotationally symmetrical shape, i.e., the actuating section 30 of the first jaw part 2 corresponds to the actuating section 30 of the second jaw part 2 when rotated about the longitudinal axis L or about an axis parallel to it. Therefore, all statements relating to the actuating section 20 in relation to Fig. 4, which shows the first jaw part 2, apply equally to the actuating section 20 of the second jaw part 2'.

[0075] For pivoting, a pivot pin 21 is provided on the actuating section 20 of each jaw part 2, 2'. A pivot recess 52 is formed on the arm section 50 of the fork arm 5 for pivoting the pivot pin about a pivot axis S. Furthermore, each jaw part 2, 2' has a coupling opening 22 on the actuating section 20 for engagement with the actuating element 3, the distal end section 30 of which is shown in Fig. 6. The distal end section 30 of the actuating element 3 is designed here as a flat tab section, which is rotationally symmetrical with respect to the longitudinal axis L and has two drive pins 32, 32'. The drive pins 32, 32' are arranged on the opposite sides of the tab-like end section 30. Each drive pin 32, 32' is provided for insertion into the coupling opening 22 on the actuating section 20 of the respective jaw part 2, 2'.The actuating section 20 of the jaw parts 2, 2', which is designed as a flat disc section, comes into contact with the respective side of the tab-like end section 30. An actuating force is transmitted to the jaw parts 2, 2' via the drive pins 32, 32' of the actuating element 3 at the coupling openings 22 and through the disc-shaped actuating section 20. The torque about the pivot axis S for opening or closing the jaw parts 2 is generated by the movement of the coupling openings 22 of the actuating section 20.

[0076] To maximize the leverage for pivoting each jaw section 2, 2', the coupling opening 22 and pivot pins 21 on the actuating section 20 are spaced as far apart as possible, i.e., arranged on opposite edge regions as shown in Fig. 4. Accordingly, the drive pins 32, 32' on the distal end section 30 of the actuating element 3 are spaced from the longitudinal axis L. Thus, the drive pins 32, 32' extend orthogonally to the longitudinal axis L and in opposite directions from the edge region on the respective side of the tab-like KARL STORZ SE & Co. KG - 11 - 2023P00216WG

[0077] End section 30. Corresponding to the marginal arrangement of the pivot pin 21 on the actuating section 20, the pivot recess 52 of the fork arm 5, as shown in Fig. 3, is also radially spaced from the longitudinal axis L or an axis parallel thereto. The pivot recess 52, thus arranged in the edge region of the arm section 50, is open on one side towards the edge.

[0078] For the pin-path control, each jaw part 2, 2' has a guide pin 23, which is formed on the actuating section 20 parallel to the pivot pin 21 and pointing in the same direction. In Fig. 4, the guide pin 23 is located adjacent to the coupling opening 22. On the inside of the arm section 50 of the fork arm 5 in Fig. 3, a guide track 53, concentric to the pivot recess 52, is formed as a control cam for guiding the guide pin 23 during the pivoting movement of the jaw part 2, 2'. The guide track 53 is provided by a cylindrical surface section 53, which is part of the rim of a recess 53c on the inside of the arm section 50, wherein the pivot axis S corresponds to the central axis of the cylindrical shape of the guide track 53.

[0079] The distance between the guide track 53 and the pivot recess 52 corresponds to the distance between the guide pin 23 and the pivot pin 21. The guide track 53 has a stop 53a, 53b on both sides, at which the perimeter of the recess 53c deviates from its cylindrical shape and, in the example shown, runs radially parallel to the longitudinal axis L. The recess 53c opens towards the edge of the arm section 50 in the opposite direction to the pivot recess 52. In an alternative embodiment (not shown), the recess 53c can be a circular arc-shaped groove. In any case, the distal stop 53a, acting as an open stop, limits the opening angle of the jaw sections 2, 2'. Thus, the maximum opening angle of the jaw sections 2, 2' is determined by the angular position of the guide track 53, which runs concentrically around the pivot recess 52. The proximal stop 53b corresponds to the closed position of the jaw parts 2, 2' or can be e.g.to serve as a force limiting element in closed jaw parts 2, 2'.

[0080] The three-part design of the fork holder 4, consisting of the two fork arms 5 and the fork base 6, allows the mounting of the surgical jaw tool 1, which features the aforementioned joint mechanism with the pin-track control. Despite the pivot recess 52 being open on one side, the joint arrangement of the fork arms 5 with the fork base 6 prevents the jaw sections 2, 2' from shifting or falling out laterally perpendicular to the pivot axis S and the longitudinal axis L. This is because the guide pin 23 of the jaw section 2, 2' is always engaged in the guide track 53 of the arm section 50 of the fork holder 4.

[0081] To facilitate assembly of the joining arrangement, each fork arm 5 has a joining section 51 in addition to the arm section 50, and the fork body 6 has two contact sections 61, 61', each designed to connect to a joining section 51 of a fork arm, as shown in Figures 3 and 5. The fork body 6 has a cylindrical base shape, which is continued by the fork arms 5 with a partially cylindrical outer surface. The inner surfaces of the fork arms 5 are flat. KARL STORZ SE & Co. KG - 12 - 2023P00216WG

[0082] The contact sections 61, 61' lie diametrically opposite the tube section 60 of the fork body 6 and are essentially planar. The contact sections 61, 61' extend as a cylindrical segment-shaped recess towards the distal end of the fork body 6. The joining section 51 is correspondingly shaped as a cylindrical segment, so that in the joining arrangement, the joining section 51 of the fork arms 5 aligns flush with the cylindrical shape of the tube section 60 with the contact sections 61, 61' of the fork body 6. The planar contact surface of the cylindrical segment-shaped joining section 51 is set off from the remaining planar inner surface of the fork arms 5.

[0083] The complementary shape of joining section 51 and contact section 61, 61' facilitates the correct alignment of the arm sections 50 parallel to the longitudinal axis L when arranging the fork arms 5 on the fork body 6. This is supported by form elements 54 on each joining section 51, which can be positively engaged with complementary mating elements 64 on the contact section 61, 61'. In the example shown, the form elements 54 on the joining section 51 of the fork arm 5 are designed as elongated holes 54, and the mating elements 64 on the contact sections 61, 61' of the fork body 6 are designed as key profiles 64 that project from the surface of the contact section 61, 61'. Each elongated hole 54 forms a positive locking pair with a key profile 64, wherein in the present example one of the two positive locking pairs is aligned parallel to the longitudinal axis L and the second positive locking pair is aligned orthogonally with respect to the longitudinal axis L.

[0084] The system sections 61 , 61 ' of the fork body 6 with the key profiles 64 are rotationally symmetrical and the fork arms 5 with the elongated holes 54 at the joining sections 51 are manufactured in the same way, so that no distinction of the fork arms 5 is required when arranging them on the fork body 6.

[0085] The assembly steps of the method for manufacturing the surgical jaw tool 1 are explained below with reference to Figures 7 to 11. As a first step S1, an assembly set is provided, comprising two jaw parts 2, 2', an actuating element 3, two fork arms 5, and a fork body 6, as shown in Figures 4 to 6. That is, each jaw part 2, 2', in addition to an operating section 24, has an actuating section 20, which is designed with a pivot pin 21 for rotatable mounting about a pivot axis S, with a coupling opening 22 for engagement with the actuating element 3, and with a guide pin 23. The actuating element 3 has two drive pins 32, 32' at a distal end section 30, which are designed to engage with the coupling opening 22 of the respective jaw part 2, 2'.Each fork arm 5 of the assembly set has a joining section 51 and an arm section 50, which is designed with a pivot recess 52 for receiving the pivot pin 21 and with a guide track concentric to the pivot recess 52, the distance of which from the pivot recess 52 corresponds to the distance of the guide pin 23 from the pivot pin 21. The fork body 6 is designed with a tube section 60 and two contact sections 61 for connecting to the joining sections 51 of the fork arms 5.

[0086] Fig. 7 shows an arrangement of the second process step S2 consisting of a first fork arm 5 and a first jaw part 2', which is mounted on the first fork arm 5. The figure shows that the KARL STORZ SE & Co. KG - 13 - 2023P00216WG

[0087] The guide pin 23 engages in the recess 53c on the guide track 53. Simultaneously, the pivot pin 21 is received in the U-shaped, one-sided open pivot recess 52 (not visible in Fig. 7), so that the first jaw part 2' can pivot about its pivot axis S.

[0088] A further process step, which is carried out before or after the second process step S2, relates to the insertion of the actuating element 3 into the fork body 6, which has a through-bore 65 coaxial with the longitudinal axis L. An elongated rod section 31 of the actuating element 3, extending from the distal end section 30, is guided through the through-bore 65. The rod section 31 is inserted into the through-bore 65 from the distal side of the fork body 6, to which the contact sections 61, 61' extend. The rod section 31 has a cross-sectional profile 33 that deviates from a circular shape and is flattened parallel to the distal end section 30 (see Fig. 6).This ensures that the rod section 31, which protrudes from the through-bore 65 during longitudinal movement of the actuating element 3, is guided in a rotationally secure manner between the arm sections 50, which, with their inner surfaces – parallel to the distal end section 30 – provide a corresponding partial profile that deviates from the circular shape.

[0089] In the third process step S3, the actuating element 3, inserted into the fork body 6, engages with the first jaw part 2, as shown in Fig. 8. A first drive pin 32' formed on the distal end section 30 is received in the coupling opening 22 of the first jaw part 2. This allows an axial movement of the actuating element 3 to be transmitted as a pivoting movement of the first jaw part 2'. Furthermore, in this step S3, the fork body 6 engages with the first fork arm 5. For this purpose, the first fork arm 5 with the joining section 51 is positioned on the first contact section 6T of the fork body 6, whereby a positive-locking engagement occurs between the forming elements 54 of the joining section 51, here elongated holes, and the corresponding forming elements 64 of the contact section 6T, here key profiles. The positive-locking engagement ensures the correct alignment of the first fork arm 5 on the fork body 6.

[0090] Subsequently, in process step S4, the second jaw part 2 is engaged with the actuating element 3, as shown in Fig. 9. The second drive pin 32 is received in the coupling opening 22 of the second jaw part 2 at the end section 30 of the actuating element 3. The actuating section 20 of the second jaw part 2 is identical, or rotationally symmetrical, to the actuating section 20 of the first jaw part 2, while the working sections 24 of both jaw parts 2, 2' are mirror images of each other.

[0091] Fig. 10 shows the assembly obtained by process step S5 after the second fork arm 5 has been arranged. The second jaw section 2 is pivotally mounted by receiving the pivot pin 21 of the second jaw section 2 in the pivot recess 52 of the second fork arm 5. The guide pin 23 of the second jaw section 2 is also received in the guide track 53 of the second fork arm 5 (hidden in Fig. 10). The aligned arrangement of the second fork arm 5 on the fork body 6 includes the positive engagement of the elongated holes 54 in the joining section 51 of the second fork arm 5 with the key profiles 64 on the second contact section 61 of the fork body 6. KARL STORZ SE & Co. KG - 14 - 2023P00216WG

[0092] In the described assembly procedure, the use of ordinal numbers to designate the fork arms 5, jaw parts 2, 2', drive pins 32, 32', and mounting sections 61, 61' primarily serves to distinguish similar components during the procedure. A restriction to a specific sequence of components, such as the jaw parts 2, 2', whose operating sections 24 are mirror-symmetrical, is not intended; the sequence in which the jaw parts 2, 2' are assembled is arbitrary: The assembly procedure can equally well begin with the other jaw part 2 as the first jaw part 2, since the actuating sections 20 of both jaw parts 2, 2' are rotationally symmetrical.

[0093] To form the fork holder 4 in the joining arrangement of the two fork arms 5 and the fork body 6, the joining sections 51 are material-bonded to the contact sections 61, 61', so that the surgical jaw tool 1 is obtained in process step S6. For material-bonded joining, for example, each positive-locking pair consisting of the elongated hole 54 and the key element 64 can be welded to the connecting edges of the working surfaces, which are accessible from the outside due to the through-holes 54. Alternatively or additionally, the other connecting edges between the fork arms 5 and the fork body 5 can also be material-bonded, e.g., welded. The other connecting edges are located on the cylindrical outer surface of the fork body 6, which defines the contact sections 61, 61' as cylindrical segment-shaped recesses, and on the cylindrical outer surface of the cylindrical segment-shaped joining sections 51.The outer surface of the fork mount 4 can then be sanded again for a homogeneous appearance.

[0094] For further assembly of the surgical jaw tool 1 to the surgical instrument 10 (Fig. 2), the rod section 31 of the actuating element 3 is inserted into the outer shaft 7. The outer shaft 7 is connected at its distal end to the fork holder 4, as shown in Fig. 11. For this purpose, the fork body 6 has a stepped, reduced-diameter coupling section 62 with two bayonet lugs 63 on the proximal side of the tube section 60, as also shown in Figs. 5, 8-10. The coupling section 62 is received in a distal coupling section 70 of the outer shaft 7 until the distal coupling section 70 abuts the annular shoulder formed between the tube section 60 and the coupling section 62. The two bayonet cams 63 engage with two bayonet grooves 72, which extend in an L-shape along the distal coupling section 70 of the outer shaft 7.Other connection types between an outer shaft and a fork mount of a surgical instrument are known and can be used as an alternative to the bayonet connection.

[0095] To secure the connection between the fork bracket 4 and the outer shaft 7, a sleeve assembly consisting of a retaining sleeve 83 and a connecting sleeve 8 (Figs. 12, 13) is also provided. The retaining sleeve 83 shown in Fig. 12 has a distal retaining section 84 that surrounds the tube section 60 with the joining sections 51 of the fork arms 5 arranged on the contact sections 61, 61'. A proximal retaining section 85 of the retaining sleeve 83, set off from the distal retaining section 84 and reduced in diameter, surrounds the distal coupling section 70 of the outer shaft 7, in which the coupling section 62 of the fork body 6 is received. For this purpose, the inner diameters of the distal and proximal holding sections 84, 85 of the KARL STORZ SE & Co. KG - 15 - 2023P00216WG are adapted accordingly to the outer diameters of the tube section 60 of the fork body 6 and of the distal coupling section 70 of the outer shaft 7.

[0096] The connecting sleeve 8 in Fig. 13 surrounds the retaining sleeve 83 and extends beyond it on both sides, with the connecting sleeve 8 abutting flush with a radial shoulder 55 on the partially cylindrical outer surface of the fork arms 5 at a distal contact section 82. This ensures that the contour of the distal tool tip is continuous, smooth, and without radial projections. The radial shoulder 55 on the outer surface divides the fork arms 5 into the arm section 50 and an intermediate section 56, to which the joining section 51 is attached (see Figs. 3, 7-12). The outer diameter of the distal contact section 82 of the connecting sleeve 8 corresponds to the outer diameter of the partially cylindrical outer surface of the arm sections 50, while the offset outer diameter of the partially cylindrical outer surface of the intermediate section 56 corresponds to the outer diameter of the partially cylindrical outer surface of the joining section 51.

[0097] At the other end, the connecting sleeve 8 has a proximal connecting section 80 with an internal thread 81 as a connecting element 81 for engagement with an external thread 71, which the outer shaft 7 has as an additional connecting element 71. The external thread 71 is located proximal to the distal coupling section 70, so that it is not covered by the retaining sleeve 83 (see Figs. 11 and 12). An inner contour of the connecting sleeve 8 is adapted to the outer contour of the retaining sleeve 83. The proximal connecting section 80 is radially offset from the distal stop section 82 of the connecting sleeve 8, i.e., it has a reduced outer diameter. For further sealing and to smooth the outer contour of the distal tool tip, a sealing sleeve 7', e.g., a heat-shrink tube, is arranged, as shown in Fig.1 can be seen, extending along the outer shaft 7 and the proximal connecting section 80 to connect flush to the distal mounting section 82 of the connecting sleeve 8.

[0098] Depending on the diameter ratio between the sleeves 8, 83 and the distal coupling section 70, the connecting element 71 and the outer shaft 7, it may be provided for assembly that the retaining sleeve 83 with its distal retaining section 84 is arranged on the pipe section 60 and, if necessary, also the connecting sleeve 8 with its distal contact section 82 on the retaining sleeve 8, before the coupling section 62 of the fork body 6 is connected to the distal coupling section 70 of the outer shaft 7.To couple the outer shaft 7 with the fork holder 4, the distal coupling section 70 is inserted into the proximal holding section 85 of the holding sleeve 83 within the proximal connecting section 80 of the connecting sleeve 8, whereby the bayonet cams 63 on the coupling section 62 of the fork body 6 are received into the bayonet grooves 72 of the distal coupling section 70 and the internal thread 81 on the connecting section 80 is brought into engagement with the external thread 71 on the outer shaft 7.

[0099] To complete the surgical instrument 10, the outer shaft 7 is connected at its proximal end to the actuating device 9, which is engaged with the proximal end of the actuating element 3. KARL STORZ SE & Co. KG - 16 - 2023P00216WG

[0100] The present invention provides a surgical jaw tool 1, a surgical instrument 10, a jaw tool 1, and a method for its manufacture. The surgical jaw tool 1 comprises two jaws 2, 2', an actuating element 3 defining a longitudinal axis L, and a fork-shaped holder 4 with two arm sections 50 and at least one tube section 60 through which the actuating element 3 extends to engage the two jaws 2, 2', which are movably mounted between the two arm sections 50 about a pivot axis S. Each jaw part 2, 2' has a pivot pin 21 on an actuating section 20, which is received in a pivot recess 52 formed on the arm section 50 to form the pivot axis S, and has a coupling opening 22 in which one of two drive pins 32, 32' formed on a distal end section 30 of the actuating element 3 is received.Each jaw section 2, 2' has a guide pin 23, and each arm section 50 has a guide track 53 concentric with the pivot recess 52 for guiding the guide pin 23, the distance of which from the pivot pin 21 corresponds to the distance of the guide track 53 from the pivot recess 52. The fork holder 4 is formed in a joining arrangement, wherein each fork arm 5 has a joining section 51, and the fork body 6 has two contact sections 61, 61' which are connected in the joining arrangement to the joining sections 51 of the fork arms 5. The drawings, the description, and the claims contain numerous features in combination. It is understood that the aforementioned features can be used not only in the combinations specified but also in other combinations or individually without departing from the scope of the present invention.

[0101] KARL STORZ SE & Co. KG 2023P00216WO

[0102] Reference symbol list

[0103] 1 Surgical jaw instrument

[0104] 2, 2' Mouth part

[0105] 20 Actuation section

[0106] 21 pivot pins

[0107] 22 Coupling opening

[0108] 23 guide pins

[0109] 24 Effective section

[0110] 3 Actuating element

[0111] 30 Distal end section

[0112] 31 bar section

[0113] 32, 32' Drive pin

[0114] 33 Cross-sectional profile

[0115] 4 Fork mount

[0116] 5 Fork arm

[0117] 50 arm section

[0118] 51 Joining section

[0119] 52 Swivel recess

[0120] 53 Guide rail

[0121] 53a, b, c Distal, proximal stop, recess

[0122] 54 Shape element / slotted hole

[0123] 55 Radial heel

[0124] 56 Intermediate section

[0125] 6 fork bodies

[0126] 60 pipe section

[0127] 61, 61' Plant section

[0128] 62 Detached, proximal coupling section

[0129] 63 Coupling element / bayonet cam

[0130] 64 Counterform element / key profile

[0131] 7 Outer shaft

[0132] 70 Distal coupling section

[0133] 71 Connecting element / external thread

[0134] 72 Dome element / bayonet groove

[0135] 7' Sealing sleeve / heat shrink tubing

[0136] 8 Connecting sleeve

[0137] 80 Proximal connecting section

[0138] 81 Connecting element / Internal thread

[0139] 82 Distal plant section

[0140] 83 Retaining sleeve

[0141] 84 Distal stopping section

[0142] 85 Proximal stopping section KARL STORZ SE & Co. KG - 18 - 2023P00216WO

[0143] 9 Actuating device

[0144] 10 Surgical Instrument

[0145] S swivel axis

[0146] L Instrument longitudinal axis

Claims

KARL STORZ SE & Co. KG - 19 - 2023P00216WG Patent claims 1. Surgical jaw tool (1) with two jaw parts (2, 2'), an actuating element (3) defining a longitudinal axis (L), and a fork-shaped holder (4) having two arm sections (50) and at least one tube section (60) through which the actuating element (3) extends to engage with the two jaw parts (2, 2'), which are movably mounted between the two arm sections (50) about a pivot axis (S), wherein each jaw part (2, 2') has on an actuating section (20) a pivot pin (21) which is received in a pivot recess (52) formed on the arm section (50) to form the pivot axis (S), and a coupling opening (22) in which one of two drive pins (32, 32') formed on a distal end section (30) of the actuating element (3) is received, characterized in that each jaw part (2,2') a guide pin (23) and each arm section (50) has a guide track (53) concentric to the pivot recess (52) for guiding the guide pin (23), the distance of which from the pivot pin (21) corresponds to a distance of the guide track (53) from the pivot recess (52), and the fork support (4) is formed from two fork arms (5) having the arm sections (50) and a fork body (6) having the tube section (60) in a joining arrangement, wherein each fork arm (5) has a joining section (51) and the fork body (6) has two contact sections (61, 61') which are connected in the joining arrangement to the joining sections (51) of the fork arms (5).

2. Surgical jaw tool (1) according to claim 1, characterized in that the contact sections (61, 61') are located diametrically on the tube section (60) of the fork body (6), wherein the contact sections (61, 61') of the fork body (6) and the joining sections (51) of the fork arms (5) are designed to align the arm sections (50) parallel to an axis of rotation of the tube section (60), so that the arm sections (50) extend diametrically and parallel with respect to the longitudinal axis (L) of the tube section (60) in the joining arrangement.

3. Surgical jaw tool (1) according to claim 1 or 2, characterized in that each contact section (61, 61') on the tube section (60) is formed by a recess extending to a distal end of the fork body (6), and the joining section (51) of each fork arm (5) is designed complementary to the recess, wherein the joining section (51) in the joining arrangement on the contact section (61, 61') flush complements a cylindrical shape of the tube section (60), wherein the recess on the tube section (60) for forming the contact section (61, 61') and the joining section (51) complementing the recess are preferably cylindrical segment-shaped. KARL STORZ SE & Co. KG - 20 - 2023P00216WG 4. Surgical jaw tool (1) according to at least one of claims 1 to 3, characterized in that the joining sections (51) of the fork arms (5) are connected to the contact sections (61, 61') of the fork body (4) in the joining arrangement to form the fork holder (4) by a positive-locking connection, a material-locking connection, a friction-locking connection or a combination thereof, wherein the positive-locking connection is formed by at least one forming element (54) formed on the joining section (51) and at least one counter-forming element (64) formed on each contact section (61, 61'), which is complementary to the forming element (54) of the joining section (51), and wherein the material-locking connection is a welded, soldered or bonded connection, and wherein the friction-locking connection has at least one retaining element that holds the joining section (51) on the contact section (61, 61') and is selected from a group which at least rivets, screws,Includes sleeves (8, 83), spring clips and retaining clips.

5. Surgical jaw tool (1) according to claim 4, characterized in that, on each joining section (51) two or more forming elements (54) are formed and on each contact section (61 , 61 ') two or more counter-forming elements (64) are formed which are complementary to the forming elements (54) of the joining section (51), and / or the forming element (54) on the joining section (51) is an elongated hole (54) and the counter-forming element (61) on the contact section (61 , 61 ') is a key profile (64).

6. Surgical jaw tool (1) according to claim 4 or 5, characterized in that the forming elements (54) on the joining sections (51) of the two fork arms (5) are formed in the same manner and the contact sections (61 , 61 ') with the counter forming elements (64) of the fork body (6) are formed rotationally symmetrically.

7. Surgical jaw tool (1) according to at least one of claims 1 to 6, characterized in that the fork body (6) has a stepped, diameter-reduced coupling section (62) and / or at least one coupling element (63) on the proximal side of the tube section (60), which is designed for connection with a coupling element (72) on a distal coupling section (70) of an outer shaft (7) in which the actuating element (3) can be arranged longitudinally movably. KARL STORZ SE & Co. KG - 21 - 2023P00216WG 8. Surgical jaw tool (1) according to claim 7, characterized in that a retaining sleeve (83) as a retaining element has a distal retaining section (84) which surrounds the tube section (60) in the joining arrangement, and a proximal retaining section (85) which is designed to receive in a connecting arrangement of the fork body (6) and the outer shaft (7) its distal coupling section (70) with the coupling section (62) arranged therein.

9. Surgical jaw tool (1) according to claim 7 or 8, characterized in that the surgical jaw tool (1) has a connecting sleeve (8) which secures the connection of the fork holder (4) with the outer shaft (7), wherein the connecting sleeve (8) has a connecting element (81) on a proximal connecting section (80) which is designed to connect to a connecting element (71) of the outer shaft (7) arranged proximal to the dome element (72), and wherein the connecting sleeve (8) abuts distally on a radial shoulder (55) of the fork arms (5) which is formed between the arm section (50) and the connecting section (51).

10. Surgical jaw tool (1) according to at least one of claims 1 to 8, characterized in that the drive pins (32, 32') on the distal end section (30) of the actuating element (3) are radially spaced from the longitudinal axis (L) and are rotationally symmetrical, and / or a rod section (31) of the actuating element (3), which connects to the distal end section (30) and extends through the fork body (6), has a cross-sectional profile (33) that deviates from a circular shape and is guided in a rotationally secure manner between the arm sections (50), which provide a corresponding partial profile deviating from a circular shape on their inwardly facing side.

11. Surgical instrument (10) comprising a surgical jaw tool (1) with two jaw parts (2, 2'), an actuating element (3) and a fork holder (4) through which the actuating element (3) extends to engage with the two jaw parts (2, 2') which are pivotably mounted in the fork holder (4) about at least one pivot axis (S), wherein the fork holder (4) is arranged at a distal end of an outer shaft (7) through which the actuating element (3) extends longitudinally and engages with an actuating device (9) which is arranged at a proximal end of the outer shaft (7), characterized in that the surgical jaw tool (1) is a surgical jaw tool (1) according to at least one of claims 1 to 10. KARL STORZ SE & Co. KG - 22 - 2023P00216WG 12. Method for manufacturing a surgical jaw tool (1) according to at least one of claims 1 to 10, comprising the steps 51) Providing an assembly kit comprising the two jaw parts (2, 2'), the actuating element (3), the two fork arms (5) and the fork body (6), 52) Mounting one of the first of the two jaw parts (2, 2') on one of the first of the two fork arms (5), receiving the pivot pin (21) in the pivot recess (52) and the guide pin (23) in the guide track (53); 53) Engaging the actuating element (3) inserted into the fork body (6) with the first of the two jaw parts (2, 2') by receiving a first of the two drive pins (32, 32') formed on the distal end section (30) in the coupling opening (22) of the first of the two jaw parts (2, 2'), and Arranging the first fork arm (5) with the joining section (51) on one of the first of the two mounting sections (61 , 61 ') of the fork body (6); 54) Engaging a second of the two jaw parts (2, 2') with the actuating element (3) by receiving a second of the two drive pins (32, 32') formed on the end section (30) in the coupling opening (22) of the second of the two jaw parts (2, 2'); and 55) Arranging the second of the two fork arms (5) under support of the second of the two jaw parts (2, 2') by receiving the pivot pin (21) in the pivot recess (52) and the guide pin (23) in the guide track (53), and Arranging the second fork arm (5) with the joining section (51) on a second of the two mounting sections (61 , 61') of the fork body (6); 56) Forming the fork holder (4) from the two fork arms (5) and the fork body (6) in the joining arrangement by connecting the joining section (51) of the first fork arm (5) with the first of the two attachment sections (61 , 61 ') and the joining section (51) of the second fork arm (5) with the second of the two attachment sections (61 , 61 ') and obtaining the surgical jaw tool (1).

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