MEDICAL TOOL TIP, ACTUATOR, SURGICAL INSTRUMENT AND FASTENING METHOD

Description

[0001] The present invention relates to a medical tool tip, an actuating device, a surgical instrument and a method for attaching a medical tool tip to an actuating device.

[0002] US 2019 / 000488 A1 discloses a medical tool tip, an actuating device and a method for attaching a medical tool tip to an actuating device.

[0003] In some medical procedures, surgical instruments are used to remove or extract bone, cartilage, or other tissue. Such instruments typically have an elongated shaft with a medical tool attached to its distal end, i.e., the end furthest from the user. A mechanism at the proximal end of the shaft, i.e., the end closer to the user, allows the user to operate the tool, for example, a punch or spoon forceps.

[0004] In practice, it is common for different tools to be required during a procedure, and / or for a single tool to be needed in several sizes. Therefore, with regard to acquisition costs, storage capacity, and practicality, surgical instruments have been developed that consist of an actuating device and an interchangeable medical tool tip. Depending on the requirements, the desired tool tips can be attached successively to a single actuating device, which is held by the user and has the mechanism for actuating the tool at its proximal end. This can also improve safety during the procedure by allowing for immediate replacement if the tool tip bends or becomes blunt, and it can enhance sustainability, as only the tip, and not the entire instrument, needs to be disposed of.

[0005] Against this background, it is an object of the present invention to further improve the user-friendliness when using a surgical instrument or at least parts thereof.

[0006] This problem is solved by a medical tool tip, an actuating device, a surgical instrument and a method for attaching a medical tool tip to an actuating device according to the independent claims.

[0007] Preferred embodiments are the subject of the dependent claims and the following description.

[0008] A first aspect of the invention relates to a medical tool tip for a surgical instrument. The tool tip comprises a first, preferably one-piece, tip section with a first fastening section for tool-free attachment of the first tip section to a base body of an actuating device, and a second, preferably one- or two-piece, tip section with a second fastening section for tool-free attachment of the second tip section to a slide of the actuating device. The second tip section is attached to the first tip section in a longitudinally displaceable manner, at least in part, and in particular permanently without tools.According to the invention, the first and second fastening sections are designed, in particular arranged relative to each other or arranged by longitudinal displacement, in such a way that the fastening of the second tip part to the slide, in particular by at least partial insertion of the second fastening section into the slide, can only take place when the first tip part is already attached to the base body, in particular by positive locking, and thereby secured.

[0009] One aspect of the invention is based on the approach of enabling the creation of a connection between a medical tool tip with a first tip section and a second tip section longitudinally displaceable thereto, and an actuating device by actuating the actuating device in a manner typical of the invention. For this purpose, it is advantageous that (i) a slide of the actuating device can be brought into a mounting position by longitudinal displacement relative to a base body of the actuating device, in which the first tip section can be attached to the base body, and (ii) the slide – with the first tip section attached – can be connected to the second tip section by at least partial longitudinal displacement out of the mounting position.On the other hand, it is also advantageous for a first fastening section of the first tip part for attachment to the base body and a second fastening section of the second tip part for attachment to the slide to be designed, in particular arranged or arrangable, for example, spaced apart from each other in a longitudinal direction of the tool tip, such that fastening of the second tip part to the slide is possible even after the first fastening section has already been attached to the base body. In this respect, it is preferred that the first and second fastening sections are designed, in particular arranged, for example, spaced apart, such that the tool tip can be attached to the actuating device in two stages.

[0010] The slide can, for example, be designed such that, only in the mounting position, it allows the first mounting section to be inserted into a base body mounting section for tool-free, and in particular positive-locking, attachment to the base body. When the first tip section is attached to the base body, the second mounting section is advantageously not yet connected to the slide – preferably due to its arrangement relative to the second mounting section.By attaching the first tip part to the base body, it is preferably possible to fix it in such a way that, when the slide is longitudinally displaced – as is expediently triggered by actuating the actuating device – a slide attachment section slides onto the second attachment section, thus creating a connection, in particular a positive locking connection, between the slide and the second tip part without the need for tools.

[0011] Such a designed fastening device on the one hand and / or such a designed tool tip on the other not only allows for tool-free attachment of the tool tip to the actuating device, but also enables attachment with very few steps. The actuating device, which is typically used to move the slide longitudinally from the fastening position to connect with the second tip part, can generally be operated with one hand. In other words, the actuating device can be held and operated with one hand – thus fully securing the tool tip to the actuating device. Therefore, it is unnecessary to operate a separate locking mechanism. Without such a separate locking mechanism, there is also no risk of accidental release during use.This allows different tool tips to be changed quickly and safely, even under stress and sterile conditions, for example directly in an operating room.

[0012] Preferred embodiments of the invention and their further developments are described below, which, unless expressly excluded, can be combined with each other and with the aspects of the invention described below.

[0013] In a preferred embodiment, the first fastening section and the second fastening section have at least partially the same contour. In other words, the first tip portion in the first fastening section and the second tip portion in the second fastening section are preferably designed such that they have the same outline, at least partially and from a predetermined viewing angle. The first and second fastening sections do not necessarily have to have the same dimensions. In particular, it is conceivable that the first fastening section is smaller, especially narrower, at least partially than the second fastening section.This allows for a simple and intuitive attachment of the first attachment section to the base body, since the slide attachment section, which is actually designed to connect the second tip part, can then be used to guide the first attachment section into the base body attachment section.

[0014] It is therefore preferred that the second mounting section projects laterally beyond the first mounting section on both sides, transverse to the longitudinal extent of the tool tip. In other words, the first tip section in the first mounting section is narrower than the second tip section in the second mounting section. This ensures that only the first tip section can be attached to the base body, but not the second tip section. In particular, this prevents the punch tip from being incorrectly attached to the actuating device, i.e., the second tip section from being attached to the base body, especially upside down.

[0015] As an alternative to different dimensions, particularly width, of the first and second mounting sections, other means of preventing incorrect mounting are conceivable. For example, the first tip section can have a groove on a side opposite the second tip section for receiving a guide rail of the base body. This ensures that the first and second mounting sections can only be fully received by the actuating device when the groove faces the guide rail. In this respect, the tool tip in some embodiments can be designed to generally prevent incorrect mounting on the actuating device.

[0016] Preferably, the first and second fastening sections have the same contour in a contact plane. For example, the first tip section can have a top surface facing the second tip section with a flat first contact surface. Similarly, the second tip section expediently has a bottom surface facing the first tip section with a flat second contact surface. The second contact surface of the second tip section can contact the first contact surface in at least one operating position. Preferably, the first and second contact surfaces lie in the contact plane, at least during this contact. The first contact surface and the second contact surface are preferably shaped identically, at least partially. Identical shaping can be understood, in particular, as a shaping of the two contact surfaces in which the contact surfaces have the same shape. Identical dimensions, i.e.,The dimensions are not strictly necessary. In particular, the first contact surface can be smaller than the second. Such contact surfaces ensure that the contours of the two fastening sections are identical.

[0017] In a further preferred embodiment, the first fastening section has a first projection that extends longitudinally to a proximal end of the first tip section. Alternatively or additionally, it is preferred that the second fastening section has a second projection that extends longitudinally to a proximal end of the second tip section. Such projections enable a particularly robust connection between the tool tip and the actuating device. In particular, this prevents the tool tip from falling out of the actuating device during use when the latter is rotated 180° about its longitudinal axis. Furthermore, this allows the tool tip to be connected to the actuating device without any step formation.

[0018] The first projection advantageously has a top surface with a flat upper surface. Alternatively or additionally, the second projection has a bottom surface with a flat lower surface. Preferably, the lower surface is oriented substantially parallel to the top surface. With such a design of the first and second projections, smooth actuation of the tool tip can be ensured.

[0019] A particularly secure and positive locking attachment of the tool tip to the actuating device can be achieved by having the first and second projections preferably each have side walls that run essentially perpendicular to the top surface and the bottom surface and are uniformly uneven.

[0020] For example, the first tip section in the first mounting section can have a top surface with a top surface and a first bulge that extends transversely to a surface normal of the top surface. Alternatively or additionally, the second tip section in the second mounting section can have a bottom surface with a bottom surface facing the top surface and a second bulge that extends transversely to a surface normal of the bottom surface and is shaped similarly to the first bulge. Here, too, similar shaping can be understood to mean, in particular, that the shapes have the same form, such as the same contour. However, the shapes do not necessarily have to be the same size. The bulges allow for a positive-locking attachment to the actuating device, in particular an engagement from behind by the base body mounting section or the slide mounting section.The identical shapes allow the tool tip to be reliably removed from the actuating device. If these are arranged essentially in alignment with each other, it is also possible to guide the first fastening section out through a recess in the slide – in which the second fastening section is located during operation.

[0021] Advantageously, the first tip section and / or the second tip section each have a convex curvature in the area of ​​the first or second bulge, respectively. This allows the slide, in particular, to be bent upwards in the slide mounting section when pushed onto the second tip section, so that part of the slide mounting section engages behind the second bulge.

[0022] In another preferred embodiment, the tool tip is designed as a sterile, single-use tool. This can significantly simplify logistics, for example in a hospital, as the tool tip does not need to be sterilized after use. Furthermore, this ensures a constant supply of fresh, and therefore sharp, tool tips. The guaranteed sterility of such a single-use tool also enhances patient safety.

[0023] Alternatively, the tool tip can also be designed to be reusable, i.e., specifically cleanable and / or sterilizable. This may reduce procurement effort and / or costs.

[0024] A second aspect of the invention relates to an actuating device for a surgical instrument. The actuating device comprises (i) a base body with a base body mounting section for tool-free, in particular positive-locking, attachment of a first tip portion of a medical instrument tip to the base body, and (ii) a slide with a slide mounting section for tool-free, in particular positive-locking, attachment of a second tip portion of the instrument tip to the slide, the second tip portion being longitudinally displaceable, in particular permanently without tools, attached to the first tip portion. The slide is attached to the base body, at least partially, in a longitudinally displaceable manner, in particular permanently without tools.According to the invention, for tool-free attachment of the tool tip to the actuating device, the slide (i) can be brought into a mounting position by at least partial longitudinal displacement relative to the base body, in which the first tip part can be attached to the base body in the base body mounting section. The slide is also (ii) designed such that, with the first tip part attached to the base body, the second tip part can be connected to the slide in the slide mounting section by at least partial longitudinal displacement of the slide out of the mounting position, and in particular, can be inserted at least partially into the slide mounting section.

[0025] The actuating device can be designed such that the slide is lifted from the base body in the mounting position. In other words, a gap can form between the slide and the base body when the slide is moved longitudinally into the mounting position. Advantageously, the slide and base body are aligned essentially parallel to each other – as is typical for actuating devices of this type.

[0026] Such an actuating device is particularly user-friendly, as it allows, for example, the quick changing of different tool tips even under stress and sterile conditions, such as directly in the operating room. This can lead to shorter operating times, among other things. Furthermore, the actuating device also reduces the space required on an instrument tray, since multiple complete surgical instruments are no longer needed for different applications.

[0027] In a preferred embodiment, a contour of the base body mounting section and a contour of the slide mounting section are aligned, at least partially and substantially, with each other when the slide is in the mounting position. This allows, for example, the first mounting section to be guided through the slide mounting section into the base body mounting section for attaching the first tip part to the base body.

[0028] In the context of the invention, two components or their contours are aligned, at least partially and substantially, if the essential features of the components or contours, such as corners, edges, or other distinctive shapes, are aligned with one another. Alignment, therefore, does not imply absolute congruence. Rather, it can be understood as a position of two components relative to one another in which the components or their contours, particularly their distinctive sections, correspond to each other. In this respect, two components can be aligned, at least partially and substantially, even if one component is slightly larger than the other.

[0029] At least partial alignment of the contours of the base body mounting section and the slide mounting section is essentially possible, for example, if the base body has a top surface facing the slide with a flat sliding surface. Similarly, the slide can have a bottom surface facing the base body with a flat sliding surface, allowing the slide to slide along this surface at least partially during longitudinal displacement relative to the base body, for example, until the slide lifts off the base body. This can facilitate the smooth operation of the actuating device.

[0030] In order not to hinder the attachment of the first tip part to the base body, it is preferred that the base body sliding surface and the slide sliding surface are aligned with each other at least partially and substantially when the base body and the slide are in the attachment position.

[0031] In particular, the base body mounting section can have a base body recess and the slide mounting section a slide recess, which, in the mounting position, are at least partially and substantially aligned with each other. The base body recess and the slide recess advantageously allow the first mounting section and the second mounting section, respectively, to be received, particularly in a positive-locking manner. By aligning these recesses, at least substantially, in the mounting position of the slide, the first mounting section can be inserted through the slide mounting section into the base body mounting section. The slide recess can serve as a guide in this process. Conversely, by aligning them when the tool tip is released from the actuating device, the first mounting section can be removed through the slide.Therefore, by aligning the tips, both tip parts can be released from the actuating device simultaneously.

[0032] In a further preferred embodiment, the contour of the slide mounting section no longer coincides—in particular, no longer coincides completely and substantially—with the contour of the base body mounting section when the slide is or becomes longitudinally displaced relative to the base body from its mounting position. This allows for reliable securing of the first tip section to the base body.

[0033] Therefore, it is preferred that the slide mounting section is configured to secure the first tip section attached to the base mounting section. Securing in this context can be understood, in particular, as fixing and / or locking the first tip section, especially the first mounting section. In other words, the slide mounting section is advantageously configured, and in particular designed, such that it can prevent the first tip section from detaching from the base after a longitudinal displacement from its mounting position. The slide mounting section can thus serve not only to establish a connection between the slide and the second tip section, but also to fasten the first tip section to the base.

[0034] Conversely, the slide can also be designed to release the first tip section, which is attached to the base mounting section, when it is in the mounting position. In other words, the slide mounting section can be designed so that the first tip section can only be detached from the base when the slide is in the mounting position. This prevents the tool tip from unintentionally detaching from the actuating device.

[0035] In a further preferred embodiment, the slide is forked in the slide mounting section to at least partially engage the second tip section. In particular, the slide in the slide mounting section can be designed to laterally engage the second tip section, especially the second mounting section. Lateral engagement here can be understood as engaging (cross-sectional) surfaces whose surface normals are aligned parallel to the surface normals of the first and second sliding surfaces. Due to the forked design of the slide, the second mounting section can be inserted into the slide mounting section, i.e., "frontally" into the slide, by longitudinally displacing the slide relative to the base body from its mounting position.

[0036] To reliably grip the second tip section, particularly laterally, the slide mounting section preferably has two fork tines. These tines can be leaf-like, i.e., thin in their longitudinal extent. This reduces the stiffness of the tines.

[0037] Therefore, it is particularly preferred that the fork tines for attaching the second tip section are designed to be deformable by longitudinal displacement of the slide. This means that the fork tines can be designed to be bent outwards, especially laterally, for sliding onto the second tip section. This allows the slide attachment section to be slid, for example, over a bulge, particularly a lateral one, of the second attachment section and engage behind it.

[0038] It is therefore particularly preferred that the slide mounting section is configured to engage with the second tip section for fastening. In this way, the slide mounting section and the second mounting section can form a locking mechanism, such that the slide mounting section engages with the second mounting section when the actuating device is activated and the slide is subsequently moved longitudinally. This allows for a simple and cost-effective connection between the slide and the second tip section. Simultaneously, the automatic locking mechanism triggered by actuating the device increases safety against unintentional detachment of the tool tip from the actuating device. This eliminates the need for additional separate locking systems such as levers or detents.

[0039] A third aspect of the invention relates to a surgical instrument. The instrument advantageously comprises an actuating device according to the second aspect of the invention and a medical tool tip according to the first aspect of the invention. Such an instrument is easy and safe to use, particularly due to its self-locking and locking mechanism upon actuation. The reusability of at least the actuating device saves raw materials, storage space, and energy. In this respect, the instrument is particularly environmentally friendly and cost-effective.

[0040] A fourth aspect of the invention relates to a method for attaching a medical tool tip, particularly according to the first aspect of the invention, to an actuating device, particularly according to the second aspect of the invention. The medical tool tip advantageously comprises a first tip section and a second tip section attached to the first tip section in a longitudinally displaceable manner, particularly without tools. The actuating device advantageously comprises a base body and a slide attached to the base body in a longitudinally displaceable manner, particularly without tools. In the method, the slide is moved into a mounting position by longitudinal displacement relative to the base body, and the first tip section is attached to the base body in a mounting section of the base body in a tool-free manner, particularly by positive locking, using a first mounting section.Furthermore, and in particular afterwards, the second tip part is attached to the slide in a slide attachment section by means of a second attachment section, by longitudinally displacing the slide relative to the base body out of the attachment position without tools, in particular by positive locking.

[0041] This method allows for the rapid exchange of different tool tips, even under stress and sterile conditions, for example in the operating room. In particular, sharp cutting tool tips can be replaced more easily and quickly, which can lead to shorter operating times.

[0042] The invention will now be explained in more detail with reference to the figures. Where expedient, elements with the same effect are designated with the same reference numerals. The invention is not limited to the embodiments shown in the figures – not even with regard to functional features. The preceding description, as well as the subsequent description of the figures, contains numerous features, some of which are summarized in the dependent claims. However, those skilled in the art will also consider these features, as well as all other features disclosed above and in the subsequent description of the figures, individually and combine them into meaningful further combinations.In particular, all of the aforementioned features can be combined individually and in any suitable combination with the medical tool tip according to the first aspect of the invention, the actuating device according to the second aspect of the invention, the surgical instrument according to the third aspect of the invention and the method according to the fourth aspect of the invention.

[0043] They show, especially at least partially schematically: Fig. 1 an example of a surgical instrument; Fig. 2 assemblies of the surgical instrument made of Figure 1 Fig. 3: An example of a medical tool tip in a side view; Fig. 4: The medical tool tip made of Figure 3 in disassembled form; Fig. 5 the medical tool tip made of Fig. 3 in a top view; Fig. 6 an example of a distal end of an actuating device in a sectional view; Fig. 7 the distal end of the actuating device made of Figure 6in a three-dimensional representation; and Fig. 8 an example of a method for attaching a medical tool tip to an actuating device.

[0044] Figure 1 Figure 1 shows an example of a surgical instrument 1 with a medical tool tip 10 and an actuating device 100. The tool tip 10 has a first tip section 20 and a second tip section 30 attached to the first tip section 20 so that it is longitudinally displaceable at least in certain sections. The actuating device 100 has a base body 120 and a slide 130 attached to the base body 120 so that it is longitudinally displaceable at least in certain sections. The longitudinal displacement of the slide 130 relative to the base body 120 can be triggered, for example, by means of an actuating mechanism 110.

[0045] At a proximal end, i.e., the end facing the user when using the instrument 1, the actuating device 100 preferably has a handle 140. It is advantageous that the handle 140 is formed by the base body 120. Another part of the base body 120, together with a corresponding section of the slide 130, forms a shaft 150.

[0046] The tool tip 10 is arranged at a distal end of the actuating device 100, in particular the shaft 150, i.e., at an end facing away from the user when using the surgical instrument 1. The tool tip 10 is an interchangeable tool tip (see Figure 2) and, in the present illustration, is connected to the actuating device 100 in a ready-to-use configuration. For this purpose, the first tip section 20 is expediently attached to the base body 120 and the second tip section 30 to the slide 130. For example, due to a shorter design of the second tip section 30 compared to the first tip section 20, the slide 130 projects beyond the base body 120 at the distal end of the actuating device 100.

[0047] When the actuating mechanism 110 is triggered, in particular by pulling a release lever 111, the slide 130 moves towards its distal end relative to the base body 120. The connection between the slide 130 and the second tip part 30 allows the tool tip 10 to be actuated.

[0048] At the in Figure 1The tool tip shown (10) is, purely as an example, a so-called spoon or grasping forceps. However, the surgical instrument (1) could also be fitted with a different tool tip, for example, a punch, a disc attachment, a needle holder, a clamp, or scissors.

[0049] Figure 2 shows components of surgical instrument 1 from Figure 1 , namely in particular the actuating device 100 and the tool tip 10 detached from it. This makes a first fastening section 21 of the first tip part 20 and a second fastening section 31 of the second tip part 30 visible. The slide 130 is in a fastening position relative to the base body 120 in which, in particular, the first tip part 20 can be fastened (or detached) to the base body 120.

[0050] The fastening sections 21, 31 advantageously serve to fasten the first and second tip parts 20, 30 to the base body 120 and slide 130, respectively. The first fastening section 21 is preferably insertable into a base body fastening section 121 at the distal end of the base body for fastening to the base body 120. In other words, the base body 120 is advantageously configured in the base body fastening section 121 to receive the first fastening section 21, particularly in a form-fitting manner.

[0051] It is advantageous that the base body mounting section 121 is only accessible in the mounting position of the slide 130 for the first mounting section 21. Therefore, it is preferred that the slide 130 secures the first mounting section 21 in the base body mounting section 121 in at least one operating position. Such an operating position is advantageously present when the slide 130 – as in the Figure 1 The surgical instrument 1 shown in its operational state extends beyond the base body 120, in particular the base body attachment section 121, at its distal end.

[0052] The second fastening section 31 is preferably inserted into a slide fastening section 131 at the distal end of the slide 130 for fastening the second tip part 30 to the slide 130. In other words, the slide 130 is advantageously configured in the slide fastening section 131 to receive the second fastening section 31, particularly in a form-fitting manner. The slide fastening section 131 can be configured to slide onto, and in particular to snap into, the second fastening section 31. A connection between the slide 130 and the second tip part 30 is preferably established simply by longitudinally displacing the slide 130 relative to the base body 120, i.e., by actuating the actuating mechanism 110.

[0053] The sled 130 is expediently in the mounting position - as in Figure 2shown – lifted from the base body 120. This can not only facilitate the removal and attachment of the first tip part 20 from or to the base body 120, but also the cleaning or sterilization of the actuating device 100. Therefore, the attachment position can also be referred to as the cleaning or sterilization position. The actuating device 100 can be removed from the base body 120. Figure 1 The operating state shown is brought into the mounting position by, for example, releasing a locking mechanism on the actuating mechanism 110 and manually pulling the slide 130 towards the proximal end relative to the base body 120. A corresponding actuating element 112 is advantageously provided on the slide 130 for releasing the locking mechanism.

[0054] Figure 3Figure 1 shows an example of a medical tool tip 10 in a side view. The tool tip 10 has a first tip part 20 and a second tip part 30 which is longitudinally displaceable from the first tip part 20. The first tip part 20 has a first mounting section 21 and the second tip part 30 has a second mounting section 31, each for attachment to a base body or slide of an actuating device (see Figure 1). Figures 1 and 2 ) are set up.

[0055] Advantageously, the first fastening section 21 and the second fastening section 31 are designed, and in particular arranged, such that first the first fastening section 21 can be attached to the base body and then the second fastening section 31 to the slide. In other words, the first and second fastening sections 21, 31 can be designed, and in particular arranged, such that a two-stage fastening of the tool tip 10 to the actuating device is possible. For example, the first fastening section 21 can first be hooked into a base body fastening section of the base body, whereupon a slide fastening section of the slide can be slid onto the second fastening section 31 by longitudinal displacement relative to the base body.In particular, by attaching the first fastening section 21 to the base body, the second fastening section 31 can be positioned and / or held in such a way as to enable or at least simplify the establishment of a connection between the second fastening section 31 and the slide.

[0056] For two-stage attachment to the actuating device, the mounting sections 21, 31 can, for example, be spaced apart from one another, particularly in a longitudinal direction of the tool tip 10. Such an arrangement can be easily achieved by making the second tip section 30 shorter than the first tip section 20.

[0057] Figure 4 The tool tip shows 10 from Figure 3in disassembled form. A possible embodiment of the first and second fastening sections 21, 31 is shown. The first fastening section 21 and the second fastening section 31 can each have a first and second projection 22, 32, respectively, which extends longitudinally to a proximal end 23, 33 of the respective tip section 20, 30. In particular, the first and second fastening sections 21, 31 can be defined by the respective projection 22, 32. The projections 22, 32 are advantageously shaped such that they can be received by the base body in the base body fastening section or by the slide in the slide fastening section in a form-fitting and secure manner.

[0058] To enable smooth operation of the tool tip 10, it is advantageous for the first tip part 20, in particular the first mounting section 21, to have a top surface 24 with a flat top surface 25. The top surface 24 is advantageously oriented towards a bottom surface 34 of the second tip part 30, in particular the second mounting section 31. The bottom surface 34 advantageously has a flat bottom surface 35.

[0059] It is preferred that the top surface 25 and the bottom surface 35 are expediently parallel to each other. Figure 4 The corresponding surface normals 25a, 35a of the top surface 25 and the bottom surface 35 respectively are shown.

[0060] Figure 5 The tool tip shows 10 from Figure 3in a top view. Here, a possible shape of the first tip part 20 in the first fastening section 21, in particular the first projection 22, and of the second tip part 30 in the second fastening section 31, in particular the second projection 32, is shown.

[0061] The first and second projections 22, 32 expediently have side walls 26, 36. These side walls 26, 36 can be perpendicular to the Figure 4 The lines run perpendicular to the plane of Figure 5, i.e., the upper surface and the lower surface as shown. For reliable, and in particular positive, attachment to the actuating device, the side walls 26, 36 are preferably unevenly shaped.

[0062] For example, the first and second fastening sections 21, 31 can each have a first and second bulge 27, 37, respectively. These bulges 27, 37 expediently run transversely to the in Figure 4The surface normals of the top surface and bottom surface are shown. In other words, the projections 22, 32 preferably have a lateral thickening – i.e., located in the region of the side walls 26, 36.

[0063] The bulges 27, 37 preferably each have a convex curvature. The first and second fastening sections 21, 31 can be shaped such that the first and second fastening sections 21, 31 can be engaged from behind by the base body and the slide, respectively. This prevents unintentional detachment of the tool tip 10 from the distal end of the actuating device in the longitudinal direction.

[0064] As in Figure 5As can be clearly seen, in one possible embodiment, the first fastening section 21 and the second fastening section 31 have at least partially and at least substantially the same contour, in particular the same outer contour. In particular, the Figure 4 The upper surface 25 and the lower surface 35, also shown therein, must be shaped similarly, at least in sections. Therefore, it is advantageous if the side walls 26, 36 are similarly uneven, i.e., for example, if the second bulge 37 is at least substantially identical to the first bulge 27.

[0065] It is not essential that the contours of the fastening sections 21 and 31 are identical, i.e., that they can be mapped onto each other without scaling. In particular, the first fastening section 21 can be smaller, especially narrower, than the second fastening section 31. However, it is preferred that the contours are the same, i.e., that they can be mapped onto each other, at least section by section, with appropriate minor scaling.

[0066] Such a correspondence between the first fastening section 21 and the second fastening section 31 allows, in a two-stage fastening of the tool tip 10 to the actuating device, the first fastening section 21 to be secured in the base body fastening section and the slide fastening section to be slid onto the second fastening section 31 by a single actuation of the actuating device. A smaller dimension of the first fastening section 21 can ensure that it can be easily guided through the slide fastening section. This is discussed in connection with Figure 6 clearly.

[0067] Figure 6 Figure 1 shows an example of a distal end of an actuating device 100 in a sectional view. The actuating device 100 has a base body 120 and a slide 130 which is longitudinally displaceable from the base body 120.

[0068] The slide 130 is in the mounting position already shown in Figure 2, in which it is raised from the base body 120, running parallel to it. This means that in Figure 6 A base body upper surface 124 with a base body sliding surface 125 of the base body 120 is visible, which faces a slide lower surface 134 of the slide 130 with a slide sliding surface 135. The slide sliding surface 135 is advantageously designed to slide along the base body sliding surface 125 when the actuating device 100 is actuated.

[0069] The base body 120 has a base body attachment section 121 for attaching a first tip part of a medical tool tip (see Figures 3, 4 and 5The base body mounting section 121 can, in particular, be configured to receive a first mounting section of the first tip part. For this purpose, it is advantageous that the base body mounting section 121 is designed, and in particular shaped, correspondingly with the first mounting section. In particular, the base body mounting section 121 can have a base body recess 122 into which a first projection of the first tip part (see Figures 4 and 5) can be inserted in a form-fitting manner, i.e., which is designed correspondingly to the first projection.

[0070] The slide 130 has a slide mounting section 131 for attaching a second tip part of the tool tip (see Figures 3, 4 and 5) on. The slide mounting section 131 can, in particular, be configured to receive a second mounting section of the second tip part. For this purpose, it is advantageous that the slide mounting section 131 is designed, and in particular shaped, to correspond with the second mounting section. In particular, the slide mounting section 131 can have a slide recess 132 into which a second projection of the second tip part (see Figures 4 and 5 ) can be inserted in a form-fitting manner, i.e., it is formed corresponding to the second projection.

[0071] For example, both the base body mounting section 121 and the slide mounting section 131 can have a recess 123, 133. These recesses 123, 133 can be designed to accommodate corresponding bulges of the first and second mounting sections (see Figure 5 to record.

[0072] As in Figure 6As can be clearly seen, the base body mounting section 121 and the slide mounting section 131 have essentially the same contour, in particular the same inner contour, at least in sections. For example, the base body sliding surface 125 and the slide sliding surface 135 can have the same contour, at least in sections.

[0073] It is particularly advantageous that the contours of the base body mounting section 121 and the slide mounting section 131 – as shown in Figure 6As shown, the base body sliding surface 125 and the slide sliding surface 135 are aligned, at least partially and substantially, when the slide 130 is in the mounting position. In particular, the base body sliding surface 125 and the slide sliding surface 135 can be aligned, at least partially. This allows a first mounting section, shaped to correspond to the base body mounting section 121, to be easily inserted through the slide mounting section 131 and into the base body mounting section 121.

[0074] If the slide 130 is moved longitudinally relative to the base body 120 from its mounting position, it can secure the first mounting section received by the base body mounting section 121. In other words, in this operating position, the slide 130 can prevent the first mounting section from being (unintentionally) pulled out of the base body mounting section 121 through the slide mounting section 131. This can be achieved, for example, by having part of the slide 130 at least partially cover the recess 123 in the base body mounting section 121.

[0075] The attachment of the second tip section to the slide 130 is described in connection with Figure 7 explained.

[0076] Figure 7 shows the distal end of the actuating device 100. Figure 6in a three-dimensional representation. It is clearly visible that the slide 130 is advantageously designed as a fork in the slide mounting section 131. The slide 130 can, for example, have two fork tines 131a, 131b. The fork tines 131a, 131b are preferably leaf-shaped, i.e., thin relative to their longitudinal extent. This allows the slide mounting section 131 to be flexible enough to be moved longitudinally onto the second mounting section, which is advantageously shaped to correspond to the slide mounting section 131.

[0077] For example, the fork tines 131a, 131b can be moved longitudinally towards the second tip section by the bulge in the second fastening section (see Figure 5) are pushed apart laterally or bent open. When the bulge finally reaches the indentations 133, the slide attachment section 131 can engage with the second tip part by gripping the bulge from behind.

[0078] Figure 8 shows an example of a method V for attaching a medical tool tip 10 to an actuating device 100.

[0079] In process step S1, a slide 130 of the actuating device 100 is moved into a mounting position by longitudinal displacement relative to a base body 120 of the actuating device 100. The slide 130 can be longitudinally displaced, in particular, such that a contour of a slide mounting section 131 aligns with a contour of a base body mounting section 121. For example, a slide recess of the slide mounting section 131 can be aligned with a base body recess of the base body mounting section 121.

[0080] In a further process step S2, a first fastening section 21 of a first tip part 20 of the tool tip 10 is fastened in the base body fastening section 121 of the base body 120. In particular, the first fastening section 21 can be inserted into the base body fastening section 121, especially the base body recess, from above the actuating device 100, i.e., from a top side of the slide 130 facing away from the base body 120, as indicated by the arrow. The first fastening section 21 is advantageously guided through the slide fastening section 131.

[0081] In a further process step S3, a second mounting section 31 of a second tip part 30 of the tool tip 10 is secured from its mounting position by longitudinally displacing the slide 130 relative to the base body 120. Advantageously, the first mounting section 21 is simultaneously secured in the base body mounting section 121, for example by having the slide 130 at least partially cover the base body mounting section 121, which is open upwards in an actuating position.

[0082] Advantageously, the slide mounting section 131 slides longitudinally, as indicated by the arrow, onto the second mounting section 31 until the slide 130 engages with the second mounting section 31. The second mounting section 31 is preferably enclosed laterally.

[0083] Consequently, it is possible to establish a connection between the slide 130 and the second tip section 30 by simply actuating the actuating device 100, while simultaneously fixing the first tip section 20 to the base body 120. This can significantly increase user-friendliness and allow for the safe operation of the surgical instrument assembled in this way. Reference symbol list

[0084] 1 surgical instrument 10 medical tool tip 20 first tip section 21 first attachment section 22 first projection 23 proximal end of first tip section 24 top 25 top surface 25a surface normal of top surface 26 side wall 27 first bulge 30 second tip section 31 second attachment section 32 second projection 33 proximal end of second tip section 34 underside 35 underside surface 35a surface normal of bottom surface 36 side wall 37 second bulge 100 actuating device 110 actuating mechanism 111 release lever 112 actuating element 120 body 121 body attachment section 122 body recess 123 indentation 124 top of body 125 body sliding surface 130 slide 131 slide attachment section 131a Fork tines 131b Fork tines 132 Slide recess 133 Indentation 134 Slide underside 135 Slide sliding surface 140 Handle 150 Shank V Procedure S1-S3 Procedure steps

Claims

1. A medical tool tip (10) for a surgical instrument (1), having - a first tip part (20) with a first attachment portion (21) for toolless attachment of the first tip part (20) to a base body (120) of an actuation device (100), and - a second tip part (30) with a second attachment portion (31) for toolless attachment of the second tip part (30) to a slide (130) of the actuation device (100), wherein the second tip part (30) is at least partially longitudinally displaceably attached to the first tip part (20), characterized in that the first and second attachment portions (21, 31) are configured such that the second tip part (30) can be attached to the slide (130) by at least partial longitudinal displacement of the slide (130) only when the first tip part (20) has already been attached and secured to the base body (120).

2. The tool tip (10) as claimed in claim 1, characterized in that the first attachment portion (21) and the second attachment portion (31) have at least partially the same contour.

3. The tool tip (10) as claimed in any of the preceding claims, characterized in that - the first attachment portion (21) has a first protrusion (22) which, running longitudinally, adjoins a proximal end (23) of the first tip part (20) and has a top side (24) with a flat top side face (25), - the second attachment portion (31) has a second protrusion (32) which, running longitudinally, adjoins a proximal end (33) of the second tip part (30) and has an underside (34) with a flat underside face (35) which is oriented substantially parallel to the top side face (25), and - the first and second protrusions (22, 32) have respective side walls (26, 36) which run substantially perpendicularly to the top side face (25) and underside face (35) and are formed similarly uneven.

4. The tool tip (10) as claimed in any of the preceding claims, characterized in that - the first tip part (20) in the first attachment portion (21) has a top side (24) with a top side face (25) and a first bulge (27), which runs transversely to a surface normal (25a) of the top side face (25), and - the second tip part (30) in the second attachment portion (31) has an underside (34) with an underside face (35) facing the top side face (25) and a second bulge (37), which runs transversely to a surface normal (35a) of the underside face (35) and is formed similarly to the first bulge (27).

5. An actuation device (100) for a surgical instrument (1), having - a base body (120) with a base body attachment portion (121) for toolless attachment of a first tip part (20) of a medical tool tip (10) to the base body (120), and - a slide (130) with a slide attachment portion (131) for toolless attachment of a second tip part (30) of the tool tip (10), which is longitudinally displaceably attached to the first tip part (20), to the slide (130), wherein the slide (130) is at least partially longitudinally displaceably attached to the base body (120), characterized in that for toolless attachment of the tool tip (10) to the actuation device (100), the slide (130) - can be brought into an attachment position by at least partial longitudinal displacement relative to the base body (120), in which position the first tip part (20) can be attached to the base body attachment portion (121) of the base body (120), and - is configured such that a first attachment portion (21) of the first tip part (20) can be inserted in the base body attachment portion (121) only in the attachment position, and, when the first tip part (20) is attached to the base body (120), the second tip part (30) can be attached to the slide (130) in the slide attachment portion (131) by at least partial longitudinal displacement of the slide (130) out of the attachment position.

6. The actuation device (100) as claimed in claim5, characterized in that a contour of the base body attachment portion (121) and a contour of the slide attachment portion (131) at least partially substantially align with one another when the slide (130) is in the attachment position.

7. The actuation device (100) as claimed in one of claims 5 or 6, characterized in that - the base body (120) has a base body top side (124) facing the slide (130) with a flat base body sliding face (125), - the slide (130) has a slide underside (134) facing the base body (120) with a flat slide sliding face (135), via which the slide (130) at least partially slides along the base body sliding face (125) on a longitudinal displacement relative to the base body (120), and - the base body sliding face (125) and the slide sliding face (135) at least partially substantially align with one another when the slide (130) is in the attachment position.

8. The actuation device (100) as claimed in any of claims 5 to 7, characterized in that the base body attachment portion (121) has a base body recess (122), and the slide attachment portion (131) has a slide recess (132), which at least partially substantially align with one another in the attachment position.

9. The actuation device (100) as claimed in any of claims 5 to 8, characterized in that the slide attachment portion (131) is configured to secure the first tip part (20) attached to the base body attachment portion (121).

10. The actuation device (100) as claimed in any of claims 5 to 9, characterized in that the slide (130) is configured to release the first tip part (20) attached to the base body attachment portion (121) in the attachment position.

11. The actuation device (100) as claimed in any of claims 5 to 10, characterized in that the slide (130) in the slide attachment portion (131) is formed as a fork for at least partially surrounding the second tip part (30).

12. The actuation device (100) as claimed in any of claims 5 to 11, characterized in that the slide attachment portion (131) has two fork tines (131a, 131b) which are designed to be deformable for attaching the second tip part (30) by longitudinal displacement of the slide (130).

13. The actuation device (100) as claimed in any of claims 5 to 12, characterized in that the slide attachment portion (131) is configured to engage on the second tip part (30) for attachment.

14. A surgical instrument (1) with an actuation device (100) as claimed in any of claims 5 to 13, and a medical tool tip (10) as claimed in any of claims 1 to 4.

15. A method (V) for attaching a medical tool tip (10) with a first tip part (20) and a second tip part (30), which is attached longitudinally displaceably on the first tip part (20), to an actuation device (100) with a base body (120) and a slide (130) which is longitudinally displaceably attached on the base body (120), having the steps: - (S1) bringing the slide (130) into an attachment position by longitudinal displacement relative to the base body (120); - (S2) toollessly attaching the first tip part (20) by means of a first attachment portion (21) on the base body (120) in a base body attachment portion (121), wherein the first attachment portion (21) can be inserted in the base body attachment portion (121) only in the attachment position; - (S3) toollessly attaching the second tip part (30) by means of a second attachment portion (31) on the slide (130) in a slide attachment portion (131), by longitudinal displacement of the slide (130) relative to the base body (120) out of the attachment position.