Surgical shaft instrument and method for producing a surgical shaft instrument

Abstract

The invention relates to a surgical shaft instrument (1) with at least one jaw part (30) which is movable in at least one axis (X) and by means of which a preferably pliers-like or scissors-like tool is formed in a distal end region (9), comprising a first part (10) having a first shaft portion (20) along a shaft axis (L); a second part (40) having a second shaft portion (50) along the shaft axis (L) and a second guiding means (42) in the distal end region (9); and at least one jaw part (30) which is provided on the first part (10) in the distal end region (9), said at least one jaw part (30) having a first guiding means (32) and being provided as a single piece. The first part (10) and the second part (40) are combined such that the first guiding means (32) and the second guiding means (42) interact in such a way that when the first shaft portion (20) and the second shaft portion (50) are mutually displaced, the at least one jaw part (30) is deflected about the at least one axis (X). The invention also relates to a method for producing the surgical shaft instrument (1).

Description

[0001] Surgical shaft instrument and method for manufacturing a surgical shaft instrument

[0002] The present invention relates to a surgical shaft instrument with at least one jaw movable in at least one axis, by which a preferably forceps- or scissor-like tool is formed in a distal end region, with the features of claim 1, and to a method for manufacturing a surgical shaft instrument with the features of claim 22. Furthermore, the present invention relates to a jaw for a surgical shaft instrument, a first part and / or a second part for a surgical shaft instrument, and an actuating device for a surgical shaft instrument.

[0003] Surgical shaft instruments are known in various configurations from the prior art. Surgical shaft instruments of this type are used, for example, in minimally invasive (endoscopic) procedures. Typically, such shaft instruments comprise an elongated shaft extending along a shaft axis, at the distal end of which a movable jaw is arranged, forming a tool preferably resembling forceps or scissors. The tool may be, in particular, forceps with one or two movable jaws, but also a sampler, a punch, a cutting edge, or something else.

[0004] To operate the tool, an actuating device is provided in a proximal end region of the surgical shaft instrument, which typically comprises a first and a second handle. Commonly, the first or second handle is fixed, while the other first or second handle is pivotably mounted.

[0005] The movable handles and the movable jaw of the tool are coupled via an elongated force transmission element running inside the shaft and distally displaceable within it; this element can be, for example, a pull wire or a rigid push and pull rod. When the handle is actuated, the force transmission element is axially displaced, thereby moving the tool.

[0006] Such surgical instruments with shafts have proven their worth in the past; however, it has been shown that their manufacture is complex due to the numerous components and manufacturing processes involved, and therefore such surgical instruments are expensive. In order to reuse these surgical instruments with shafts, they must be thoroughly cleaned or sterilized after each use.

[0007] This is where the present invention comes in.

[0008] The present invention is dedicated to the task of proposing a suitably improved surgical shaft instrument that is suitable for eliminating the disadvantages mentioned in relation to the prior art.

[0009] These problems are solved by a surgical shaft instrument with the features of claim 1 and by a method for manufacturing a surgical shaft instrument with the features of claim 22. The surgical shaft instrument according to the invention with the features of claim 1 comprises at least one jaw part movable in at least one axis, by which a preferably forceps- or scissor-like tool is formed in a distal end region.

[0010] Preferably, the surgical shaft instrument has a first part, wherein the first part comprises a first shaft section arranged along a shaft axis.

[0011] Furthermore, it is still preferred if the surgical instrument comprises a second part, wherein the second part comprises a second shaft section arranged along a shaft axis.

[0012] Furthermore, it is preferred if the surgical instrument has a jaw part that is arranged in the distal end region on the first part and if the at least one jaw part has a first guiding means.

[0013] The mouth part is preferably made of one piece, i.e., monolithically formed.

[0014] Furthermore, the first part and the second part can preferably be detachably assembled in such a way that the first guide means and a second guide means interact in such a way that when the first shaft section is displaced relative to the second shaft section in and / or around the shaft axis, the at least one jaw part is deflected around the at least one axis.

[0015] The first shaft section and / or the second shaft section can be moved relative to each other by a rotation around the shaft axis and / or by a displacement in the shaft axis.

[0016] The first shaft section and / or the second shaft section serve as a force transmission element as described in the introduction, through which the force generated when the surgical shaft instrument is actuated is transmitted from the proximal end region to the distal end region for actuating the tool.

[0017] The present invention is based on the idea of ​​proposing a surgical shaft instrument that has the fewest possible components and can therefore be manufactured, in particular, by primary forming processes such as injection molding, 3D printing, or the like. For this purpose, the surgical shaft instrument, especially the first part and / or the second part, is preferably designed without pivot pins, which significantly reduces the number of individual components and assembly steps.

[0018] The first shaft section and the second shaft section can form at least part of the shaft of the surgical shaft instrument described as a whole, and can connect the distal end region of the surgical shaft instrument with a proximal end region of the surgical shaft instrument.

[0019] The first and second shaft sections are arranged along the shaft axis, although it should be noted at this point that the shaft axis does not necessarily have to be straight. The shaft axis can also be curved. Accordingly, the shaft can be either straight or curved.

[0020] A further development of the present invention provides that the first guide means and the second guide means form a pivot joint. The pivot joint enables the jaw part to rotate about the at least one axis. Accordingly, the pivot joint is preferably arranged coaxially to the at least one axis. To form the pivot joint, the first guide means and the second guide means engage with each other in a form-fitting manner.

[0021] A further development of the present invention provides that the first guide means and / or the second guide means comprise at least one cam. The cam is preferably cylindrical and can furthermore be arranged coaxially to the at least one axis. The at least one cam can be formed in a simple manner during the initial forming of the jaw part.

[0022] The at least one jaw section preferably comprises a tool section and a joint section. The tool section is formed to constitute the tool and includes, for example, a cutting surface, gripping surface, coagulant, or the like. The first guide means and / or the second guide means may be arranged on the joint section.

[0023] Furthermore, it has proven advantageous if the at least one jaw section has a pivot point radially spaced from the at least one axis, which is connected or coupled to the first shaft section. Through the pivot point, a torque is applied to the jaw section when the first and second shaft sections are moved relative to each other, causing the component to rotate about the at least one axis. For example, the torque opens or closes the tool formed by the at least one jaw section. Furthermore, and this list is not exhaustive, the torque can also open or close pliers, scissors, a punch, a coagulant, and / or a spreader.

[0024] In a further development, the at least one jaw section can be coupled to the first shaft section via a friction bearing. The friction bearing transmits a force, in particular a compressive force, from the first shaft section to the jaw section by means of cooperating friction surfaces, wherein the two friction surfaces function as a joint and allow displacement of the at least one jaw section about the at least one axis by means of a relative movement. The corresponding friction surface is preferably arranged at the pivot point on the jaw section.

[0025] In a further embodiment, the at least one jaw section can be connected to the first shaft section via at least one spring section. The at least one spring section transmits a force, in particular a tensile or compressive force, from the first shaft section to the jaw section and is preferably a solid-body joint. The at least one spring section is more preferably a solid-body joint. The at least one spring section can further preferably function as a joint that allows the at least one jaw section to be displaced about the at least one axis – in particular by a preferably elastic deformation.

[0026] Preferably, at least one mouth part with the first

[0027] The shaft section is directly connected to the at least one spring section. The at least one spring section is preferably arranged at the pivot point on the jaw section. It is also advantageous if the at least one spring section is curved or spirally projecting from the at least one jaw section. The curved shape of the at least one spring section allows for a deflection of the spring section under a tensile or compressive force. Furthermore, the at least one spring section is preferably configured to transmit a tensile or compressive force from the first shaft section to the at least one jaw section as a torque.

[0028] For example, the jaw section can be connected to the first shaft section via a first spring section and a second spring section. The first spring section can preferably be arranged at the pivot point of the jaw section, and the second spring section can be arranged adjacent to the first spring section on the jaw section, thereby generating a restoring force that counteracts the first spring section.

[0029] The at least one spring section preferably has a lower bending stiffness than the first shaft section, and preferably the at least one spring section and the shaft section are made of the same material. Accordingly, the at least one spring section can have a smaller area moment of inertia than the shaft section.

[0030] Furthermore, a further development of the invention may provide at least one additional guide means. This additional guide means is preferably arranged on the second part and configured to come into operative contact with the at least one spring section. In the assembled state of the surgical shaft instrument, the additional guide means may be arranged adjacent to the articulation area. The additional guide means may support the at least one spring section, particularly during actuation of the surgical shaft instrument, in order to inhibit or limit any evasive movement of the spring section designed as a solid-state joint.The at least one further guiding means can correspond to the shape of the at least one spring section, whereby the at least one spring section can lie flat against the further guiding means.

[0031] A further development of the present invention provides that the at least one jaw section and the first shaft section are connectable to one another, or that the at least one jaw section and the shaft section are formed in one piece. In particular, it is preferred if the jaw section and the spring section, the first shaft section and the at least one spring section, or the jaw section, the at least one spring section, and the shaft section are formed in one piece. The component manufactured in one piece can, in particular, be produced by primary forming in a single manufacturing process.

[0032] Furthermore, the jaw section and the at least one spring section and / or the first shaft section and the at least one spring section can be connected to one another by a connection – preferably detachable – for example, a positive-locking connection. For example, the positive-locking connection can be designed in the manner of a puzzle-like plug-in connection, which is characterized by the fact that both torques and tensile and compressive forces can be transmitted. A further development of the present invention provides that the second guide means and / or the first guide means comprise at least one guide groove. The guide groove is preferably arranged transversely to the at least one axis and more preferably extends further in the distal end region along the shaft axis.When the first part is assembled with the at least one jaw section and the second part, the first and second guide elements come into operative contact, and the guide groove defines the position of the axis of the at least one jaw section. In other words, when the first part is assembled with the at least one jaw section and the second part, the first and second guide elements interlock, and the guide groove defines the position of the axis of the at least one jaw section.

[0033] The at least one guide groove is preferably arranged at least sectionally along the orientation of the shaft axis.

[0034] The at least one guide groove is preferably arranged at least partially parallel to the shaft axis.

[0035] However, the at least one guide groove can also be arranged in a spiral shape around the shaft axis, at least partially. Due to the spiral shape of the guide groove, the at least one jaw section can, for example, perform a superimposed rotational and pivoting movement when the first and second shaft sections are moved relative to each other. The pivoting movement preferably occurs along a first axis transverse to the shaft axis, and the rotational movement along a second axis parallel to the shaft axis. Furthermore, it has proven advantageous for the guide groove to be open at its end. In particular, it is preferred that the guide groove is open towards the distal end region. However, it is also possible for the guide groove to open onto other outer surfaces of the surgical shaft instrument.

[0036] The first guidance device and the second guidance device can be inserted into each other - preferably along the orientation of the guidance groove - thereby bringing the first guidance device and the second guidance device into effective contact.

[0037] It is particularly preferred if the guide groove has an open end and a closed end. The closed end preferably forms an abutment for the first guide element and / or the second guide element. Furthermore, it is preferred if the guide groove has a V- or J-shaped profile. In particular, the closed end forms a detent that, on the one hand, forms the abutment for the first and / or the second guide element and, on the other hand, secures the bearing position of the axis of the at least one jaw part.

[0038] Furthermore, it is advantageous if the first guide element, designed as a cam, or the second guide element is held by spring tension in the respective other guide element, designed as a guide groove. In particular, it is preferred if the at least one cam is arranged on the jaw part and the guide groove is formed on the second part, and if the at least one spring section presses the cam into the detent under spring tension. A further development of the present invention provides that the second part has at least one receptacle in its distal end region, and that the at least one jaw part can be arranged in the receptacle. In particular, it is advantageous if the at least one jaw part is held in the receptacle in a form-fit manner, especially laterally, and / or especially in the orientation of the at least one axis.

[0039] Furthermore, it has proven advantageous if the receptacle is arranged between two cheeks in the distal end region of the second part, and if at least one of the two cheeks has the first guide or the second guide on the side facing the receptacle. Each cheek preferably has a side surface facing the receptacle, with the first guide or the second guide arranged on at least one of the opposite side surfaces. For example, it is preferred if a guide groove is arranged on each of the opposite side surfaces of the two cheeks, with the guide grooves preferably being arranged in a mirror-symmetrical or line-symmetrical manner.

[0040] The at least one additional guiding element can be arranged in the receptacle, in particular on the side of the first and / or second guiding element facing the distal end region. The at least one additional guiding element can further preferably project from the cheek into the receptacle, preferably freely.

[0041] Furthermore, it has proven advantageous if the second shaft section has a shaft receptacle formed at least partially along the shaft axis, into which the first shaft section can be arranged wholly or at least partially.

[0042] In the simplest case, the second shaft section can, for example, be designed at least partially as a hollow profile (e.g., a tubular profile with a concentric, rectangular, oval, or other closed cross-section), with the first shaft section arranged inside the hollow profile—i.e., the shaft receptacle. The second shaft section can also have a U-shaped cross-section, at least partially, which partially encloses the shaft receptacle. The first shaft section can be inserted between two opposing legs of the second shaft section. The second shaft section can also have a hollow profile in some sections and a profile with an open cross-section, in particular a U-profile, in others.

[0043] According to a preferred embodiment of the invention, the shaft receptacle can provide a mechanical locking mechanism for the positive-locking connection between the jaw section and the at least one spring section and / or between the at least one spring section and the first shaft section. Preferably, the positive-locking connection is designed as a plug-in connection, particularly in the manner of a puzzle-like plug-in connection, with a plug-in direction. The plug-in direction is preferably oriented transversely to the shaft axis such that the shaft receptacle positively prevents the plug-in connection from being released.

[0044] Preferably, the shape of the first shaft section corresponds to the shape of the shaft receptacle. The first shaft section can preferably be completely received in the shaft receptacle and can furthermore "fill" the shaft receptacle, whereby the shaft formed by the two shaft sections and referred to as a whole has a surface that is as compact as possible.

[0045] The shaft preferably has a round or oval cross-section. Preferably, the shaft has a maximum diameter or width of ≥12 mm, more preferably ≥10 mm, even more preferably ≥5 mm, and most preferably approximately 2.5 mm. Particularly small shaft diameters or widths are preferred because surgical shaft instruments are preferably used in minimally invasive procedures.

[0046] According to further training, the shaft can comprise at least one channel and / or at least one conductor. The at least one channel and / or at least one conductor can be located in the first part and / or the second part. The at least one channel can be used, for example, for introducing or aspirating media. The at least one conductor can also be located in the at least one channel. The at least one conductor can be, for example, an optical or an electrical conductor. The electrical conductor can be intended for an electrosurgical device. The optical conductor can allow optical access to the distal end region. Light can also be emitted in the distal end region, for example, to improve optical accessibility.

[0047] Furthermore, connection devices may be provided, particularly in the proximal end region. These connection devices are arranged at the end of the at least one channel and / or the at least one conductor and enable, for example, the connection of optical or electrical systems. For instance, the connection devices may include at least one electrical connector through which the coagulation agents can be supplied with power. The connection device may also transmit a medium for suction or injection.

[0048] The shaft can also be cannulated according to a further development. For example, the shaft can have a cannulation along the shaft axis, preferably extending from the proximal end to the distal end. This allows, for example, aspiration or injection at the mouthpiece, which, according to a further development, can be perforated, fenestrated, and / or cannulated.

[0049] A further development of the present invention provides that the first shaft section and the second shaft section are coupled by a linear guide. It is particularly preferred if the linear guide provides a positive fit when the first and second parts are assembled. For example, the linear guide can comprise one or more L-shaped hooks that project, for example, into the shaft receptacle, particularly in the direction of the distal end region. In particular, the linear guide holds the first shaft section in the shaft receptacle of the second shaft section, especially transversely to the shaft axis, and can thus prevent unintentional dislodgement and / or bending and / or kinking of the first shaft section, especially under tension / compression.

[0050] Furthermore, it has proven advantageous if the shaft axis follows a straight axis or if the shaft axis follows a curved axis.

[0051] According to a further development of the present invention, the surgical shaft instrument can have an actuating device. The actuating device can be detachably attached to the shaft, referred to as a whole, in the proximal end region of the shaft. For this purpose, coupling means can be arranged that can establish a detachable connection between the actuating device and the two shaft sections. This allows the actuating device to be reusable or replaceable. The coupling means can preferably form a plug-in coupling, with the actuating device preferably comprising a coupling socket into which plugs can be inserted.

[0052] It is preferred if the coupling means allow rotation of the first shaft section and / or the second shaft section relative to the actuating device about the shaft axis. Furthermore, it is preferred if locking means are provided by which the position of the first shaft section and / or the second shaft section relative to the actuating device about and / or in the shaft axis can be fixed. For example, a detent can be provided for this purpose. The rotation can improve ergonomics.

[0053] The actuating device comprises at least one handle, preferably two handles, designed for actuating the tool. The at least one handle, or each handle, can be, for example, a handle branch. The second handle can be fixed and can be, for example, fixedly or detachably connected to the first or the second shaft section. The second handle can be pivotable relative to the first handle about a pivot axis and can furthermore be connected to the respective other of the first or the second shaft section.

[0054] When the actuating device is activated, a tensile or compressive force is applied to the first shaft section and / or the second shaft section, and the respective shaft section transmits the tensile or compressive force as a force transmission element from the proximal end region to the at least one jaw section located in the distal end region. The at least one jaw section is deflected about the at least one axis by the interaction of the first guide element and the second guide element.

[0055] According to a preferred embodiment of the present invention, the first part and the first handle, or the first part and the second handle, are formed in one piece. It is further preferred that the second part and the first handle, and / or the second part and the second handle, are formed in one piece. The first part and the associated handle, and / or the second part and the associated handle, can be formed monolithically, preferably by a molding process. In particular, it is preferred that the first part and the associated handle, and / or the second part and the associated handle, are manufactured by injection molding or an additive manufacturing process, such as 3D printing.

[0056] Furthermore, it has proven advantageous if the actuating device is a single piece. In particular, it is preferred if the first handle and the second handle are a single piece. For example, the first handle and the second handle can be connected to each other by a second spring section, the second spring section preferably generating a spring force that opposes the actuation.

[0057] Furthermore, it has proven advantageous if the surgical shaft instrument has two jaw sections that form the at least one tool. Each jaw section can be movably arranged in at least one axis, the axes preferably being arranged parallel or coaxially.

[0058] The two jaw sections can each be arranged in the distal end region of the first part and / or the second part. In particular, it is preferred if at least one of the two jaw sections, preferably the two jaw sections and the first part, are formed in one piece. For example, it may be advantageous if at least one of the two jaw sections is detachably attached to the first part. This makes it possible for both jaw sections to be machined, for example, to form cutting, punching, pliers, or similar surfaces.

[0059] It can also be advantageous if the first part and the at least two jaw parts are formed in one piece. Preferably, after the initial forming of the first part with the at least two jaw parts, at least one of the at least two jaw parts can be bent, preferably elastically, or spread apart for post-processing. Alternatively, at least one of the at least two jaw parts can be separated from the first part for post-processing. After post-processing, the jaw parts can be moved, bent, and / or inserted back into their respective initial positions. If the spreading apart is plastic, the jaw part(s) can be bent back into their respective initial positions after post-processing.

[0060] Each jaw section of the two jaw sections has a first guide element, which interacts with a second guide element. For example, each jaw section can have a first guide element designed as a cam, which engages with a corresponding second guide element, for example, designed as a guide groove.

[0061] Even more preferably, the two jaw sections are each connected to the first or second shaft section by means of a spring section. The deflection of the two jaw sections about their respective at least one axis can thus be synchronized.

[0062] However, the two jaw parts can also be operated independently. For this purpose, it can be advantageous to provide a second first part, designed analogously to the first part already described in detail. The second first part can also be operated by the actuating device, and it can be advantageous to provide a separate handle for the second first part.

[0063] The two jaw parts can be arranged side by side in a common recess between the two cheeks, with one first guide engaging the second guide of one cheek and the other first guide engaging the second guide of the other cheek. Each jaw part can, in particular, lie flat against its respective cheek, and furthermore, the two jaw parts can, at least partially, preferably lie flat against each other within the recess.

[0064] For each jaw section, at least one further guide means can be arranged in the receptacle, in particular on the side of the first and / or second guide means facing the distal end region. Furthermore, the present invention relates to a jaw section for a surgical shaft instrument, which has already been described above in connection with the surgical shaft instrument. The jaw section is a monolithic component and comprises at least one first guide means by which the jaw section is movable in at least one axis to form a preferably forceps- or scissor-like tool.

[0065] The jaw part can have a tool section, wherein the tool section includes, for example, a cutting edge, a gripping surface (e.g., a toothed gripping surface), a punch, a coagulant, etc.

[0066] The coagulant can, for example, form a monopolar or bipolar coagulation tool.

[0067] The at least one first guide means preferably comprises at least one cam. The cam can preferably be cylindrical and, furthermore, arranged coaxially to the at least one axis. Preferably, the at least one first guide means projects from a side surface, preferably along the axis, of the jaw part. During the initial forming of the jaw part, the at least one cam can be formed in a simple manner.

[0068] The jaw part preferably has at least one spring section. This spring section can apply a force, in particular a tensile or compressive force, to the jaw part and also functions as a joint, allowing the jaw part to be displaced about its at least one axis by elastic deformation. Preferably, the jaw part and the spring section are formed in one piece, i.e., monolithically. However, the jaw part and the spring section can be connected to each other, for example, by a positive-locking connection, in particular by means of a plug-in connection. For example, the positive-locking connection can be designed like a puzzle-like plug-in connection, which is characterized by the fact that it can transmit both torques and tensile and compressive forces.However, it is also conceivable that the jaw section and the spring section have interacting friction surfaces. A coating, a tube, or additives (e.g., adhesives, etc.) can connect the jaw section and the spring section.

[0069] The spring section is preferably arranged in a pivot area on the jaw section and further preferably with respect to the at least one axis on the side opposite the tool section. The pivot area is radially spaced from the at least one axis, whereby a tensile or compressive force on the side of the at least one spring section facing away from the pivot area results in a torque about at least one axis, by which the jaw section can be deflected about the at least one axis.

[0070] The at least one spring section preferably extends from the at least one jaw section in a curved, arc-shaped, meandering, or spiral form. The curved shape of the spring section allows it to deform under a tensile or compressive force, thus promoting rotation about the at least one axis. Furthermore, the spring section is preferably configured to transmit a tensile or compressive force along the shaft axis from the first shaft section to the at least one jaw section as a torque.

[0071] The jaw section can also have two or more spring sections. For example, the jaw section can have a first and a second spring section. The first spring section is preferably located at the pivot point on the jaw section, and the second spring section is located adjacent to the first spring section on the jaw section, thereby generating a restoring force that counteracts the first spring section.

[0072] Another aspect of the present invention relates to a first part of a surgical shaft instrument with a distal and proximal end region, wherein the first part has a first shaft section formed along a shaft axis, which extends between the distal and proximal end regions and has at least one previously described jaw part arranged in the distal end region on the first part, wherein the at least one jaw part has the first guide means and is integral.

[0073] An actuating device can be arranged in the proximal end region of the first shaft section. The actuating device can be detachably attached to the proximal end region of the first shaft section. For this purpose, coupling means can be arranged that can establish a detachable connection between the actuating device and the proximal end region of the first shaft section. This allows, for example, the actuating device to be reusable or replaceable, while the first part can be, for example, a disposable product. The actuating device comprises at least one handle designed for actuating the tool formed by the at least one jaw section.

[0074] When the actuating device is activated, a tensile or compressive force is applied to the first shaft section and transmits the tensile or compressive force as a force transmission element from the proximal end region via the spring section to the at least one jaw part arranged in the distal end region.

[0075] In the distal end section, the first part can have two or more jaw sections. Each jaw section is preferably configured to form the tool.

[0076] The jaw parts are preferably arranged symmetrically around the shaft axis, wherein the respective at least one axis can be parallel or coaxial.

[0077] A rigid jaw section can also be provided, which is permanently connected to the shaft section.

[0078] Furthermore, the present invention relates to a second part for a surgical shaft instrument, which has already been described above in connection with the surgical shaft instrument. The second part preferably comprises a second shaft section and at least one second guiding means.

[0079] Another aspect of the present invention relates to an actuating device for a surgical shaft instrument. The actuating device and its further developments have already been described above in connection with the surgical shaft instrument.

[0080] A further aspect of the present invention relates to a method for manufacturing a jaw part, a first part, a second part and / or an actuating device, in particular the jaw part, the first part, the second part and / or the actuating device described above, wherein the manufacturing is carried out by primary forming, in particular by injection molding or an additive process.

[0081] A further aspect of the present invention relates to a method for manufacturing a surgical shaft instrument, in particular a shaft instrument as previously described, with at least one jaw part movable in at least one axis, by which a preferably forceps- or scissor-like tool is formed in a distal end region, wherein the surgical shaft instrument comprises a first part with a shaft section, at least one jaw part with a first guide means and a second part with a second guide means, wherein the method comprises the following process steps:

[0082] - Original forms of the mouth part and / or the first part and / or the second part; and

[0083] - Assembling the jaw part, the first part and the second part in such a way that the first guide means (and the second guide means interact in such a way that, in the event of a mutual displacement of the second shaft section in the shaft axis, the at least one jaw part is deflected about the at least one axis.

[0084] Furthermore, it is advantageous for the process if the primary forming is carried out by casting, especially injection molding, or an additive manufacturing process. In particular, injection molding enables cost-effective production.

[0085] A further development of the process provides that the mouth part and / or the first part and / or the second part and / or the handle are formed simultaneously and / or in one piece.

[0086] A further development of the process provides that the jaw part and / or the first part and / or the second part and / or the handle piece are hardened and / or annealed and / or polished at least in sections.

[0087] Furthermore, an advantageous further development of the method provides that when assembling the first part together with the at least one jaw part and the second part, a positive locking mechanism is formed between the first part and the second part and / or a positive locking mechanism between the jaw part and the second part, in particular a positive locking mechanism by means of a notch.

[0088] The following describes two exemplary implementations with reference to the accompanying drawings. They branch out as follows:

[0089] Figure 1 shows a side view of a surgical shaft instrument with a tool formed by a jaw in a distal end region, which can be opened and / or closed by means of an actuating device arranged in a proximal end region; Figure 2 shows a partially cutaway and perspective view of the surgical shaft instrument according to Figure 1.

[0090] Figure 3 shows a perspective view of the actuating device of the surgical shaft instrument according to Figures 1 and 2.

[0091] Figure 4 shows a partially cutaway view of the actuating device according to Figure 3.

[0092] Figure 5 shows an enlarged detail view of the distal end region of the surgical instrument according to Figures 1 and 2, showing that the surgical shaft instrument comprises a first part with the movable jaw part and a second part.

[0093] Figure 6 shows a side view of the first part according to Figure 5.

[0094] Figure 7 shows an enlarged view of the distal end region of the first part.

[0095] Figure 8 is an enlarged and perspective view of the second part according to Figure 5.

[0096] Figure 9 is a cutaway detail view according to Figure 8.

[0097] Figure 10 shows a perspective and simplified representation of a second embodiment of the surgical shaft instrument, wherein the tool is a pair of scissors or forceps and is formed by two movable jaw parts; Figure 11 shows a perspective view of the distal end region of the surgical shaft instrument according to the second embodiment shown in Figure 9.

[0098] Figure 12 shows a side view of the first part of the surgical shaft instrument according to Figures 9 and 10.

[0099] Figure 13 shows a detailed representation of the distal end region of the first part according to Figures 10 and 12.

[0100] Figure 14 shows a perspective view of the second part of the surgical shaft instrument according to Figures 9 and 11.

[0101] Figure 15 shows another perspective view of the second part of the surgical shaft instrument according to Figures 10, 11 and 14, and

[0102] Figure 16 shows a sectional view of the second part according to Figures 10, 11, 14 and 15.

[0103] Identical or functionally equivalent parts or features are identified by the same reference symbols in the following detailed description of the figures. Likewise, not all identical or functionally equivalent parts or features in the figures are provided with a reference symbol.

[0104] Figures 1-8 show a first exemplary embodiment of a surgical shaft instrument 1 .

[0105] The surgical shaft instrument 1 comprises a distal end region 9 and a proximal end region 8, wherein a tool is arranged in the distal end region 9, which is formed by at least one jaw part 30 movable in at least one axis X.

[0106] The surgical shaft instrument 1 can be used, for example, in minimally invasive (endoscopic) procedures. The tool 5 can be, for example, forceps, scissors, a sampler, a punch, a spreader, or an electrosurgical device, for example, for coagulation.

[0107] The surgical shaft instrument 1 comprises, as can be seen from Figure 2, a first part 10 with the movable jaw part 30, a second part 40 and an actuating device 70.

[0108] The first part 10 with the jaw part 30 movable about the at least one axis X comprises a first shaft section 20 arranged along a shaft axis L and can be monolithic, as is also described below with reference to Figures 5-9.

[0109] The second part 40, see figures 5, 8 and 9, comprises a second shaft section 50 arranged along the shaft axis L and can also be monolithic.

[0110] The actuating device 70 is shown in detail in Figures 3 and 4. According to Figure 2, the actuating device 70 can be detachably connected to the first part 10 and / or the second part 40, for example by means of coupling means 60, or it can be monolithic with the actuating device 70.

[0111] The first shaft section 20 of the first part 10 and / or the second shaft section 50 of the second part 40 may each have coupling means 60 in the proximal end region 8 according to Figures 2 and 6.

[0112] The coupling means 60 of the first shaft section 20 can include a head 66 and / or the coupling means 60 of the second shaft section 50 can include a plug 68.

[0113] The operating device 70 comprises a first handle 71 and a second handle 81.

[0114] The first handle 71 comprises a first leg 72 and a first handle element 73, wherein the first leg 72 can rigidly connect the first handle element 73 to a coupling socket 62 of the coupling means 60.

[0115] Referring to Figures 2 and 4, it can be seen that the coupling box 62 has a through-opening.

[0116] The second handle 81 comprises a second leg 82 and a second handle element 83. The second leg 82 has the second handle element 83 at one end and a coupling receptacle 64 of the coupling means 60 at its other end.

[0117] The first handle 71 and the second handle 81 can be connected by means of a return spring 46. The return spring 76 can be formed monolithically together with the first handle 71 and the second handle 81. The two handles 71, 81 can be held together securely by the return spring 76. Furthermore, the first handle 71 and the second handle 81 can be inserted into one another to form a pivot joint along a joint axis Y.

[0118] The first handle 71 can have a receptacle 74 on the side of the coupling socket 62 facing the proximal end region 8, into which the free end of the second handle 81 or its leg 82 can be inserted.

[0119] In the inset 74, at least one joint pin 75 arranged in the joint axis Y can be present, wherein preferably the joint pin 75 is arranged offset to the shaft axis L.

[0120] The free end of the second handle 81 can have a slot 84, which preferably forms a support 85 for the joint pin 75 and / or a driver 65 of the coupling receptacle 64, which preferably can receive the head 66. The support 85 and the driver 65 are spaced apart from each other in the slot 84, with the support 85 being located between an open side of the slot 84 and the driver 65, or on a side of the driver 65 facing away from the open side of the slot 84.

[0121] Depending on the position of the abutment 85 and the driver 65, either a tensile force or a compressive force can be generated when the actuating device 70 is actuated.

[0122] As shown in Figure 2, the plug 68 can be inserted into the coupling socket 62 such that the head 66 penetrates the coupling socket 62 and can project into the receptacle 74. Figure 4 shows that the slot 84 is T-shaped and is open both to the free end of the second leg 82 and to the distal end region 9 to form the coupling receptacle 64.

[0123] The free end of the second leg 82 can be inserted into the receptacle 74 according to Figure 2 such that the head 66 and the joint pin 75 dip into the slot 84.

[0124] The head 66 comes into contact with the driver 65, and the joint pin 75, together with the abutment 85, forms the pivot joint in the joint axis Y. The slot 84 can be designed such that the joint pin 75 engages in the abutment 85 and is positively locked there.

[0125] The first part 10, the mouth part 30 and the second part 40 are described in detail below with reference to figures 5 to 9.

[0126] The first part 10 according to Figures 6 and 7 has in its distal end region 9 at least one jaw section 30, which is pivotable about an axis X. Furthermore, the first part 10 comprises the first shaft section 20, the first shaft section 20 being arranged along the shaft axis L and connecting the proximal end region 8 with the distal end region 9. In the proximal end region 8, the shaft section 20 can have the coupling means 60 described above, in particular the coupling means 60 preferably configured as a head 66.

[0127] The jaw part 30 is located in the distal end region 9 at the first

[0128] Part 10 is arranged and comprises a first guide means 32. The jaw part 30 is preferably one-piece, i.e., monolithic.

[0129] The mouthpiece 30 may also be perforated, fenestrated and / or cannulated.

[0130] The jaw part 30 can have a tool section 31, wherein the tool section 31 is arranged distally and has, for example, a cutting edge, a gripping surface e.g. a toothed gripping surface, a punch, a coagulant.

[0131] The first guide means 32 comprises at least one cam 34, wherein in the illustrated embodiment two cams 34 are provided. The respective cam 34 can preferably be cylindrical and the two cams can preferably project coaxially to the at least one axis X from opposite sides of a joint section 33 of the jaw part.

[0132] The jaw part 30 further comprises a pivoting area 35 radially spaced from the at least one axis X and preferably a first spring section 36 and / or second spring section 37, wherein the pivoting area 35 is preferably connected to the first shaft section by means of the first spring section 36.

[0133] The first spring section 36 can transmit a tensile or compressive force along the shaft axis L from the first shaft section 20 to the jaw section 30 and forms a spring joint that allows the jaw section 30 to be displaced about the axis X as a rigid joint by elastic deformation. The first spring section 36 extends curved or spirally from the pivot point 35 and can encompass the joint section 33, as shown in Figures 6 and 7.

[0134] Due to the curved shape of the first spring section 36, a deflection of the spring section 36 under a tensile or compressive force can be specified, and a tensile or compressive force can be applied from the first shaft section 20 as a torque to the at least one jaw part 30.

[0135] Furthermore, the jaw section 30 can also be connected to the first shaft section 20 via a second spring section 37. It should be emphasized that the second spring section 37 is not strictly necessary for the function of the surgical shaft instrument 1.

[0136] The second spring section 37 also connects the jaw section 30 to the first shaft section 20, wherein the second spring section 37 is arranged on the side of the joint section 33 facing the proximal end region 8 and can generate a restoring force opposing the first spring section 36. The second spring section 37 can, for example, be S-shaped or meandering, as shown in Figures 6 and 7.

[0137] The jaw part 30 and the first shaft section 20 can be formed in one piece, i.e. monolithically, according to the exemplary embodiments in Figures 6 and 7.

[0138] In the illustrated embodiment, the jaw section 30 is directly connected to the first shaft section 20 via the second spring section 37. The first spring section 36 is directly connected to the jaw section 30, and / or the first spring section 36 is connected to the first shaft section 10 by means of a detachable connection, in particular a plug connection.

[0139] This design can be particularly advantageous if the first part 10, together with the jaw part 30, is manufactured as a monolithic component in a primary forming process, and the tool section 31 requires post-processing. Due to its S- or meander-shaped design, the second spring section 37 is more flexible than the first spring section 36 and allows for easy bending for post-processing of the jaw part 30.

[0140] The plug connection between the first spring section 36 and the first part 10 is achieved by a puzzle-like plugging together of two corresponding plugs in a plugging direction, the plugging direction being preferably oriented transversely to the shaft axis L.

[0141] The first shaft section 20 can, as can be seen from Figure 6, have one or more retaining means 23 which can form a linear guide 22 , 52 which will be described later.

[0142] The retaining means 23 can protrude from the first shaft section 20 as L-shaped hooks, with the free end of the hooks being oriented either in the shaft axis L towards the distal end region 9 or towards the proximal end region 8.

[0143] The second part 40 can be seen in Figures 8 and 9. The second part 40 comprises a second shaft section 50 arranged along the shaft axis L and a second guide element 42 and may furthermore have a fixed jaw section 41 in the distal end region 9 that interacts with the jaw section 30.

[0144] The second part 40 is preferably monolithic and has - as already described - the coupling means 60, preferably designed as a plug 68, in the proximal end region 8.

[0145] Furthermore, the second part 40 has a shaft receptacle 51. In the illustrated embodiment, the shaft receptacle 51 is designed in the form of a groove and extends from the proximal end region 8 to the distal end region 9, see also Figure 15. Several retaining means 53 can be arranged in the shaft receptacle 51, which can interlock with the retaining means 23 of the first shaft section 20 to form the linear guide 22, 52, see Figure 2.

[0146] The second part 40 has a receptacle 55 in the distal end region 9 in which at least one jaw part 30 can be arranged.

[0147] The receptacle 55 is arranged between two cheeks 56 in the distal end region 9 of the second part 40. The second guide means 42, designed as a guide groove 43, are arranged on the side surfaces of the cheeks 56 facing the receptacle and opposite it.

[0148] Each guide groove 43 has an open end 44 and a closed end 45. The open end is preferably located in the distal end region, and the closed end is offset relative to the open end along the shaft axis towards the proximal end. As shown in Figure 9, each guide groove 43 has a V- or J-shaped profile. The closed end 45 of the guide groove 43 preferably forms a stop for the first guide element 32, in particular for each of the cams 34.

[0149] The closed end 45 forms a detent which on the one hand forms the abutment for the first guide means 32 and on the other hand secures the bearing position of the axis X of the jaw part 30.

[0150] The second part 40 can comprise a further guide means 47, wherein the further guide means 47 is designed to support the first spring section 36. The further guide means 47 can be arranged on the side of the closed end 45 facing the distal end region 9, wherein the further guide means 47 preferably corresponds to the shape of the spring section 36.

[0151] This allows the additional guide element 47 to form a guide track against which the first spring section 36 can preferably bear in a flat position. The additional guide element 47 is also preferably arranged adjacent to the pivot point 35. The additional guide element 47 prevents deflection of the first spring section 36 and allows the force to be transmitted more effectively into the pivot point 35.

[0152] The first part 10 and the second part 40 can be assembled as shown in Figures 1, 2, and 5. In this assembly, the first guide 32 and the second guide 42 come into operative contact, such that when the first shaft section 20 and the second shaft section 50 are displaced relative to each other along the shaft axis L, the at least one jaw section 30 is deflected about the at least one axis X. To manufacture the surgical shaft instrument 1, the jaw section 30 and / or the first part 10 and / or the second part 40 and / or the actuating device 70 are produced by a primary forming process. In particular, it is preferred if the jaw section 30 and / or the first part 10 and / or the second part 40 and / or the actuating device 70 are produced by a casting process, especially injection molding, preferably from a metal or a metal alloy.

[0153] After the initial forming of the jaw part 30 and / or the first part 10 and / or the second part 40 and / or the actuating device 70, the jaw part 30 and / or the first part 10 and / or the second part 40 and / or the actuating device 70 can be post-processed. For example, the tool section 31 of the jaw part 30 can be ground, milled or otherwise post-processed.

[0154] Assembly is achieved by inserting the parts in the orientation of the shaft axis L. The first guide elements 32 are thereby brought into engagement with the second guide elements 42. In other words, the first guide elements 32, preferably designed as cams 34, are inserted into the open end 44 of the guide groove, and the first shaft section 20 is inserted into the shaft receptacle 51 of the second part 40.

[0155] During assembly or joining, the cams 34 follow the course of the guide groove 43. The joint section 33 of the jaw part 30 is guided into the receptacle 55 and preferably positioned laterally supported between the cheeks 56. Preferably, the side surfaces of the joint section 33 lie flat against the cheeks 56. During assembly, the first shaft section 20 is arranged in the shaft receptacle 51 of the second shaft section 50. The two shaft sections form a shaft 6 of the surgical shaft instrument 1, which is referred to as a whole.

[0156] The shaft 6 preferably has a circular or oval cross-section. Preferably, the shaft 6 has a maximum diameter D or a maximum width B of approximately 5 mm ± 2.5 mm. Particularly small diameters D ≤ 2.5 mm or widths of the shaft 6 are preferred for minimally invasive procedures.

[0157] When the first shaft section 20 is assembled into the shaft receptacle 51 of the second shaft section 50, the linear guide 22 , 52 is formed, which creates a positive fit between the two shaft sections 20 , 50 .

[0158] The retaining means 23, 53, designed as L-shaped hooks, interlock to form the linear guide, whereby the first shaft section 20 is preferably held in the shaft receptacle 51 of the second shaft section 50 in a plane transverse to the shaft axis L and thus, for example, prevents the first shaft section 20 from unintentionally falling out and / or bending and / or buckling, especially under tension / compression.

[0159] The first spring section 36 can bias the first guide element 32 against the second guide element 42. In other words, the first spring section 36 presses the cams 34 into the abutment formed in the closed end 45 of the guide groove 43, whereby the closed end 45 forms a detent for the first guide element 42 and secures the bearing position of the axis X of the jaw section 30. The shaft receptacle 51 can provide a mechanical locking mechanism for the positive-locking connection between the jaw section 30 and / or the first spring section 36 and / or the second spring section 37 and / or between the first spring section 36 and / or the second spring section 37 and the first shaft section 20.

[0160] As described above, the connection can be designed as a plug-in connection, in particular in the manner of a puzzle plug-in connection, with the plug-in direction. The plug-in direction is preferably oriented transversely to the shaft axis L or the shaft receptacle 51, whereby the shaft receptacle 51 inhibits movement in the plug-in direction and secures the plug-in connection positively.

[0161] After the first part 10 is assembled with the jaw part 30 and the second part 40, these can all be connected to form an assembly using the coupling means 60 with the actuating device 70.

[0162] The first part 10, together with the second part 40, can be inserted in its assembled state into the coupling socket 62 of the actuating device 70 until the head 66 protrudes into the receptacle 74. Subsequently, the free end of the second leg 82 can be inserted into the receptacle 74, with the head 66 and the joint pin 75 being inserted into the slot 84, the head 66 engaging the driver, and the joint pin engaging the abutment 85.

[0163] When using the surgical shaft instrument 1, the first part 10 and the second part 40 can be moved relative to each other in the shaft axis L, for example, by the actuating device 70. Depending on the choice of tool 5, the first shaft section 20 can be moved relative to the second shaft section 50 in and / or around the shaft axis L.

[0164] When the surgical shaft instrument 1 is actuated, a tensile or compressive force is applied to the first shaft section 20 and transmits the tensile or compressive force as a force transmission element from the proximal end region 8 via the first spring section 36 to the jaw part 30 located in the distal end region 9.

[0165] Through the interaction of the first guide means 32 and the second guide means, the at least one jaw part 30 can be deflected about the at least one axis X and the pliers, scissors, punch, holder, sampler or other tools can be operated.

[0166] After use of the surgical shaft instrument 1, either the surgical shaft instrument 1 can be disassembled and sterilized, or individual parts can be disposed of as disposable products and replaced with new ones.

[0167] Figures 9-16 show a second embodiment of a surgical shaft instrument 1, the differences between the two exemplary embodiments relating to the design of the first part 10 and the second part 40 in the distal end region 9, which is why the differences will now only be discussed briefly.

[0168] Figures 9 and 10 show that the surgical shaft instrument 1 comprises two jaw parts 30, each jaw part 30 being movable about at least one axis X when the first shaft section 20 and the second shaft section 50 are displaced relative to each other.

[0169] The depicted shaft instrument 1 can be, for example, scissors or pliers.

[0170] The first part 10 according to Figures 11 and 12 has two jaw sections 30 in the distal end region 9, each of which is pivotable about an axis X. Furthermore, the first part 10 comprises the first shaft section 20. The first shaft section 20 is arranged along the shaft axis L and connects the proximal end region 8 with the distal end region 9. In the proximal end region 8, the first shaft section 20 can have the coupling means 60 described above, in particular the coupling means 60 preferably designed as a head 66.

[0171] The two jaw parts 30 can preferably be arranged symmetrically, in particular axially symmetrically around the longitudinal axis, and can also be arranged directly next to each other, and the two adjacent side surfaces can lie against each other as contact surfaces.

[0172] The respective jaw part 30 has a tool section 31, wherein the tool section 31 is arranged distally and, for example, according to the embodiment shown in Figures 9-16, has a cutting edge.

[0173] The first guide element 32 of the respective jaw part 30 comprises a cam 34. The respective cam 34 can preferably be cylindrical and is arranged on the side of the respective jaw part opposite the contact surfaces. The respective cam 34 can project coaxially from the joint section 33 of the jaw part to the at least one axis X. The two axes X can be arranged coaxially.

[0174] The respective jaw section 30 further comprises a pivoting area 35 radially spaced from at least one axis X, which is connected to the first shaft section 20 via the spring section 36.

[0175] The first spring section 36 can transmit a tensile or compressive force in the shaft axis L from the first shaft section 20 to the jaw part 30 and forms a spring joint that allows displacement of the jaw part 30 about the axis X as a solid joint by elastic deformation.

[0176] The spring section 36 extends in a curved or spiral shape from the pivot area 35 and can, as shown in Figures 10 and 11, encompass the joint section 33.

[0177] Due to the curved shape of the first spring section 36, a deflection of the spring section 36 under a tensile or compressive force can be specified, and a tensile or compressive force can be applied from the first shaft section 20 as a torque to the at least one jaw part 30.

[0178] The detailed illustrations in Figures 11 and 12 show that the respective spring section 36 of the respective jaw part 30 is connected to the first shaft section 20 by means of a plug connection. The plug connection can preferably be designed like a puzzle connection and comprises two corresponding plugs that can be plugged together in one direction. However, it is preferred if at least one of the at least two jaw parts 30 is monolithically formed with the first part 10.

[0179] The second part 40, shown in Figures 14-16, is preferably monolithic and can preferably have coupling means 60 in the proximal end region 8, designed as plugs 68 as previously described in detail.

[0180] The second part 40 can have a circular or oval cross-section and can be cannulated. Furthermore, the second part 40 can have a shaft receptacle 51. In the illustrated embodiment, the shaft receptacle 51 is designed in the form of a groove and can extend – as shown in Figure 15 – from the proximal end region 8 to the distal end region 9.

[0181] The second part 40 has a receptacle 55 in the distal end region 9, into which the two jaw parts 30 can be arranged.

[0182] The image 55 is located between two cheeks 56 in the distal end region 9 of the second part 40. On the image

[0183] 55 facing and opposite side surfaces of the cheeks

[0184] 56 are the second guide means 42 designed as guide groove 43 arranged .

[0185] The guide grooves 43 are axially symmetrical.

[0186] The second part 40 has further guide means 47, which are arranged on the side surfaces of the cheeks 56 in the distal end region 9, in particular on the side of the closed end 45 of the respective guide groove 43 facing the distal end region 9. The respective further guide means 47 projects into the receptacle 55 and can support the first spring section 36. The shape of the further guide means 47 preferably corresponds to the shape of the spring section 36.

[0187] The first spring section 36 can come into contact with the further guide means 47, in particular when the surgical shaft instrument is actuated, whereby the further guide means 47 prevents deflection of the first spring section 36, in particular adjacent to the pivot area 35.

[0188] The respective guide groove 43 can, as already explained in detail above with reference to the first embodiment and Figure 9, have an open end 44 and a closed end 45.

[0189] The open end 44 is preferably arranged in the distal end region and the closed end is offset relative to the open end in the shaft axis in the direction of the proximal end.

[0190] The guide groove 43 has a V- or J-shaped profile and the closed end 45 of the guide groove 43 preferably forms a support for the first guide means 32, in particular for each of the cams 34.

[0191] The closed end 45 forms a detent which on the one hand forms the abutment for the first guide means 42 and on the other hand secures the bearing position of the axis X of the jaw part 30.

[0192] Figures 15 and 16 further show that a connecting web 48 is arranged on the side of the second guide element 42 facing the proximal end region 8, connecting the opposing cheeks 55 to each other. The connecting web 48 can hold the two cheeks 56 together and prevent them from bending apart.

[0193] To manufacture the surgical shaft instrument 1, at least one of the two jaw parts 30 and / or the first part 10 and / or the second part 40 and / or the actuating device 70 is / are manufactured by a primary forming process. In particular, it is preferred if the at least one of the two jaw parts 30 and / or the first part 10 and / or the second part 40 and / or the actuating device 70 is manufactured by a casting process, in particular injection molding, preferably from a metal or a metal alloy.

[0194] After the primary forming of at least one of the two jaw parts 30 and / or the first part 10 and / or the second part 40 and / or the actuating device 70, at least one of the two jaw parts 30 and / or the first part 10 and / or the second part 40 and / or the actuating device 70 can be reworked.

[0195] For example, the tool section 31 of the respective jaw part 30 can be ground, milled, or otherwise machined. For this purpose, it can be advantageous if at least one of the two jaw parts 30, preferably both jaw parts 30, is either detached from the first shank section 20 before machining, or if at least one of the two jaw parts 30, preferably both jaw parts 30, is bent apart before machining. This is intended to make the respective tool section 31 accessible for machining. The first part 10 and the second part 40 can be assembled as shown in Figures 9 and 10. In this process, the first guide means 32 of the two jaw parts 30 and the second guide means 42 come into operative contact. When the first shaft section 20 and the second shaft section 50 are moved in opposite directions, the two jaw parts 30 are deflected about their respective axis X.

[0196] Furthermore, the assembly of the first part 10 and the second part 40 is carried out analogously to the first example, which is why a separate description of it is omitted here.

[0197] Reference character list

[0198] 1 sheep tins t rument

[0199] 5 tools

[0200] 6 shaft

[0201] 8 proximal end region

[0202] 9 distal end region

[0203] 10 first part

[0204] 20 first shaft section

[0205] 22 Linear guide

[0206] 23 Holding devices

[0207] 30 mouth part

[0208] 31 Tool section

[0209] 32 first command tool

[0210] 33 Joint section

[0211] 34 Cam

[0212] 35 Linkage area

[0213] 36 first spring section

[0214] 37 second spring section

[0215] 40 Part Two

[0216] 41 fixed jaw part

[0217] 42 second command and control tool

[0218] 43 Leadership

[0219] 44 of fenes End

[0220] 45 closed end

[0221] 47 further command and control tools

[0222] 48 connecting bridges

[0223] 50 second shaft section

[0224] 51 sheep baptism take

[0225] 52 Linear guide

[0226] 53 Holding devices

[0227] 55 Image 56 Cheek

[0228] 60 coupling agents

[0229] 62 coupling dose

[0230] 64 coupling lung intake

[0231] 65 Carriage

[0232] 66 ball head

[0233] 68 plugs

[0234] 70 Actuating device

[0235] 71 first handle

[0236] 72 first thigh

[0237] 73 first handle element

[0238] 74 recording

[0239] 75 joint pins

[0240] 76 Return spring

[0241] 81 second handle

[0242] 82 second thigh

[0243] 83 second handle element

[0244] 84 slots

[0245] 85 abutments

[0246] Diameter

[0247] L shaft axis

[0248] X-axis

[0249] Y-axis joint

Claims

Patent claims 1. Surgical shaft instrument (1) with at least one jaw part (30) movable in at least one axis (X) by which a preferably forceps- or scissor-like tool is formed in a distal end region (9), comprising - a first part (10) with a first shaft section (20) arranged along a shaft axis (L) , - a second part (40) with a second shaft section (50) arranged along the shaft axis (L) and a second guide means (42) arranged in the distal end region (9) and - at least one jaw part (30) arranged in the distal end region (9) on the first part (10) , - wherein at least one jaw part (30) has a first guide means (32) and is one piece, - wherein the first part (10) and the second part (40) can be assembled in such a way that the first guide means (32) and the second guide means (42) interact in such a way that when the first shaft section (20) and the second shaft section (50) are moved relative to each other, the at least one jaw part (30) is deflected about the at least one axis (X).

2. Surgical shaft instrument (1) according to claim 1, characterized in that the first guide means (32) and the second guide means (42) form a pivot joint.

3. Surgical shaft instrument (1) according to claim 1 or 2, characterized in that the first guiding means (32) comprises at least one cam (34).

4. Surgical shaft instrument (1) according to one of the preceding claims, characterized in that the at least one jaw part (30) has a pivoting area (35) radially spaced from the axis (X) which is connected or coupled to the first shaft section (20).

5. Surgical shaft instrument (1) according to one of the preceding claims, characterized in that the at least one jaw part (30) is connected to the shaft section (20) via at least one spring section (36).

6. Surgical shaft instrument (1) according to one of the preceding claims, characterized in that at least one further guiding means (47) is arranged, and that the at least one further guiding means (47) can come into contact with at least one spring section (36).

7. Surgical shaft instrument (1) according to one of the preceding claims, characterized in that the at least one jaw part (30) and the shaft- cut (20) are connectable or that at least one jaw part (30) and the shaft section (20) are one piece.

8. Surgical shaft instrument (1) according to one of the preceding claims, characterized in that the second guiding means (42) comprises a guiding groove (43).

9. Surgical shaft instrument (1) according to one of the preceding claims, characterized in that the guide groove (43) is open at the end.

10. Surgical shaft instrument (1) according to one of the preceding claims, characterized in that the guide groove (43) has a J-shaped progression and that a closed end (45) forms a support for the first guide means (32).

11. Surgical shaft instrument (1) according to one of the preceding claims, characterized in that the second part (40) has at least one receptacle (55) in the distal end region (9), and that the at least one jaw part (30) can be arranged in the receptacle (55).

12. Surgical shaft instrument (1) according to one of the preceding claims, characterized in that the receptacle (55) is arranged between two cheeks (56) and that at least one of the two cheeks (56) has the second guide means (42).

13. Surgical shaft instrument (1) according to one of the preceding claims, characterized in that the first shaft section (20) can be arranged in a shaft receptacle (51) of the second shaft section (50) which is formed at least partially along the shaft axis (L).

14. Surgical shaft instrument (1) according to one of the preceding claims, characterized in that the first part (10) and the second part (40) are coupled in the respective shaft section (20, 50) by a linear guide (22, 52).

15. Surgical shaft instrument (1) according to one of the preceding claims, characterized in that the shaft axis (L) is a curved axis or that the shaft axis (L) is a straight axis.

16. Surgical shaft instrument (1) according to one of the preceding claims, characterized in that an actuating device (70) is provided for actuating the tool.

17. Surgical shaft instrument (1) according to any one of the preceding claims, characterized by the fact that the actuating device (70) comprises two handles (71, 81).

18. Surgical shaft instrument (1) according to one of the preceding claims, characterized in that coupling means (60) are provided by which the actuating device (70) can be detachably fastened.

19. Surgical shaft instrument (1) according to one of the preceding claims, characterized in that the first part (10) and the first handle (71) and / or the second part (40) and the second handle (81) are one piece.

20. Surgical shaft instrument (1) according to one of the preceding claims, characterized in that the first handle (71) and the second handle (81) are of one piece.

21. Surgical shaft instrument (1) according to one of the preceding claims, characterized in that two jaw parts (30) are provided.

22. Method for manufacturing a surgical shaft instrument (1), in particular a shaft instrument (1) according to one of the preceding claims, with at least one jaw part (30) movable in at least one axis (X), through which a preferably forceps-like or scissor-like tool in a distal end region (9) is formed, wherein the surgical shaft instrument (1) comprises a first part (10) with a shaft section (20), at least one jaw part (30) with a first guide means (32) and a second part (40) with a second guide means (42), characterized by the process steps: - Original forms of the mouth part (30) and / or the first part (10) and / or the second part (40) , - Assembling the jaw part (30), the first part (10) and the second part (40) such that the first guide means (32) and the second guide means (42) interact in such a way that when the second shaft section (50) is displaced relative to each other in the shaft axis (L), the at least one jaw part (30) is deflected about the at least one axis (X).

23. Method according to claim 22, characterized in that the primary forming is carried out by injection molding or an additive process.

24. Method according to claim 22 or 23, characterized in that the jaw part (30) and / or the first part (10) and / or the second part (40) are preformed simultaneously.

25. Method according to one of claims 22 to 24, characterized in that a positive fit is formed between the first part and the second part by assembly.

Images