DE102022118636A1 - High-frequency connection for a surgical instrument - Google Patents

Abstract

The present invention relates to a high-frequency connection for a surgical instrument, with a connection body which has a locking section and an alignment section, the alignment section defining a connection axis of the high-frequency connection and the locking section for connection to a rotary wheel arrangement of the surgical instrument at a predetermined angle of a rotary wheel axis to the connection axis, wherein in the area of the locking section a high-frequency contact arrangement connected to the connection body is provided, which is designed to contact a high-frequency tool of the surgical instrument within the instrument base, and where the high-frequency connection is designed as a pre-assembled plug-in module for modular installation and removal in an instrument base of the surgical instrument.

Description

FIELD OF THE INVENTION

The present invention relates to a high-frequency connection for a surgical instrument.

TECHNICAL BACKGROUND

Surgical instruments are used for different applications. For example, these can be designed as microinvasive medical instruments for high-frequency surgery and have a base, for example in the form of a handling device, at the proximal end, a long and generally thin shaft, which extends from the proximal end to a distal end of the instrument, and a high-frequency accessory, i.e. H. a tool designed for HF treatment or another active device for gripping, crushing, coagulating, cutting, punching or for other applications at the distal end of the instrument. One or more transmission devices run in the shaft for transmitting a force and/or a torque from the handling device at the proximal end to the active device at the distal end. Furthermore, for the electrosurgical function, in particular in the case of monopolar or bipolar electrosurgical microinvasive medical instruments, the transmission device is also involved in transmitting electrical power from the proximal end to the distal end.

The instruments can often be dismantled into individual components so that different tools, different shafts and other connecting elements can be combined. A system with different and therefore versatile possible uses can therefore advantageously be provided.

High-quality microinvasive medical instruments are also usually designed to be reusable. In order to simplify cleaning after use, to enable replacement of a defective component and/or alternative use of different components, a high-quality microinvasive medical instrument can advantageously be dismantled.

On the one hand, in a dismantled medical instrument in which the transmission device is also involved in the transmission of electrical power, it should be possible to establish a mechanically separable and safely reestablishable electrical contact to the transmission device, particularly at the proximal end of the instrument.

This is what the publication shows DE 10 2017 124 775 A1 a microinvasive medical instrument with an instrument base and an accessory shaft that can be inserted into the instrument base with a transmission device for transmitting electrical power and for transmitting a force and / or a torque from a proximal position to a distal position. A contact device is arranged in the instrument base and is connected to a plug contact on the side facing away from the accessory shaft.

The disadvantage of such instruments is the plug contact, for example a high-frequency connection, in the instrument base, i.e. H. firmly mounted in the handle element.

An HF connection element still has the disadvantage of requiring a complex sleeve system with internal cables in order to ensure the required safety distances and sufficient insulation. The cables therefore have to be connected in a complex manner during assembly. Care must be taken to ensure that no increased contact resistance occurs at the transition points between the connector sleeves and the respective cable. Correct assembly is therefore time-consuming and requires sufficient specialist knowledge.

SUMMARY OF THE INVENTION

Against this background, the present invention is based on the object of specifying an improved high-frequency connection.

According to the invention, this object is achieved by a high-frequency connection with the features of patent claim 1.

• Ein Hoch-Frequenz-Anschluss für ein chirurgisches Instrument, mit einem Anschlusskörper, welcher einen Arretierungsabschnitt und einen Ausrichtungsabschnitt aufweist, wobei der Ausrichtungsabschnitt eine Anschlussachse des Hoch-Frequenz-Anschlusses definiert und der Arretierungsabschnitt zur Verbindung mit einer Drehradanordnung des chirurgischen Instruments in einem vorbestimmten Winkel einer Drehradachse zu der Anschlussachse ausgebildet ist, wobei im Bereich des Arretierungsabschnitts eine mit dem Anschlusskörper verbundene Hoch-Frequenz-Kontaktanordnung vorgesehen ist, die zur Kontaktierung eines Hoch-Frequenz-Werkzeugs des chirurgischen Instruments innerhalb einer Instrumentenbasis ausgebildet ist, und wobei der Hoch-Frequenz-Anschluss als vormontierbares Einsteckmodul zum modularen Ein- und Ausbau in eine Instrumentenbasis des chirurgischen Instruments ausgebildet ist.

Accordingly it is provided:

• A high-frequency connector for a surgical instrument, having a connector body having a locking portion and an alignment portion, the alignment portion defining a connector axis of the high-frequency connector and the locking portion for connecting to a rotary wheel assembly of the surgical instrument at a predetermined angle a rotary wheel axis is formed to the connection axis, wherein in the area of the locking section a high-frequency contact arrangement connected to the connection body is provided, which is used to contact a high-frequency tool of the surgical Instrument is formed within an instrument base, and wherein the high-frequency connection is designed as a pre-assembled plug-in module for modular installation and removal in an instrument base of the surgical instrument.

The finding underlying the present invention is that by constructing the high-frequency connection (HF connection) with a locking section and an alignment section, a connection of the HF connection to a rotary wheel arrangement within the instrument base can be established at a predetermined angle.

The idea underlying the present invention is to create a connection solution for surgical instruments that is easy to assemble and clean, easily replaceable if necessary, and technically optimized through a modular structure of the HF connection as a pre-assembled plug-in module.

A connection body is to be understood in particular as a structural element which, on the one hand, can be contacted with the rotary wheel arrangement, in particular with a coupling section of the rotary wheel arrangement, and, on the other hand, enables a predetermined alignment of the HF connection in the instrument base and ensures it in the assembled state. According to one embodiment, the connecting body can, for example, have two sections that are angled relative to one another, with one section being designed as a locking section and the other section as an alignment section. The two mutually angled sections allow, on the one hand, an alignment of the HF connection in the instrument base and, on the other hand, an alignment of the HF connection relative to the rotary wheel arrangement. The locking section and the alignment section therefore enable the rotary wheel axis to be aligned with respect to the connection axis.

By designing the high-frequency connection according to the invention, a surgical instrument can, for example, be modularly disassembled into individual components, such as a handle, the HF connection, an outer shaft and a working insert.

An instrument base suitable for the high-frequency connection can have different designs and, for example, include a handle element or a robot coupling. In particular, the instrument base is designed as a handle. The instrument base has at least one connection slot for inserting the HF connection. Furthermore, an accessory shaft or the like can be arranged on the instrument base, in particular in a shaft opening.

A connection shaft is to be understood in particular as a receptacle for the HF connection. The orientation of the connection shaft can be defined in combination with the design of the connection body. In particular, the orientation of the connection shaft and the connection axis can be the same. Likewise, the orientation of the rotary wheel axis can be defined by the orientation of the shaft opening.

The HF connection is designed as a pre-assembled plug-in module for modular installation and removal in an instrument base. In this way, a modular system can be provided for an electrosurgical instrument, which is characterized by the highest possible number of pre-assembled components. In particular, this allows a simple exchange and/or change between a monopolar and a bipolar design of the surgical instrument. Furthermore, such an HF connection can ensure a predetermined alignment and also contacting of the HF connection and a shaft connecting element with the accessory shaft within the instrument base.

Advantageous refinements and further developments result from the further subclaims and from the description with reference to the figures in the drawing.

According to an advantageous embodiment, the connecting body can have a through opening in the area of the locking section, which is designed to guide a transmission element of a high-frequency tool that can be passed through the rotary wheel arrangement. In particular, the transmission element is a pull rod. The through opening serves to guide and/or electrically contact the pull rod guided in an accessory shaft. The opening is advantageously larger than the largest diameter of a tie rod head of the tie rod element. The tie rod element can be passed through the through opening and hung on an actuating element. In the case of a hand-operated surgical instrument, the actuating element can be a thumb ring element which can be movably mounted on the instrument base to actuate the pull rod.

According to one embodiment, the high-frequency contact arrangement can have at least one in the area of the through opening, in particular have a high-frequency contact element arranged on a side facing away from the locking section, which is designed to contact the pull rod. For example, the high-frequency contact element can be at least one spring contact, which can in particular be designed as a resilient bent sheet metal part. As a result, on the one hand, the pull rod can be held in position and stored through the through opening, and on the other hand, contact between the pull rod and the contact element can be ensured by the contact arrangement in the area of the through opening. The contacting and positioning can therefore advantageously be implemented in a very narrow installation space.

According to a preferred embodiment, the high-frequency contact arrangement can have at least one high-frequency contact element for contacting an accessory shaft of the high-frequency tool. The at least one HF contact element can be designed as a, in particular resilient, bent sheet metal part. It can be fixed, for example welded, to the locking section. Furthermore, several, in particular identical, HF contact elements can be arranged around the through opening, in particular distributed around the circumference of the through opening. The HF contact elements are, for example, equally spaced and arranged adjacent to one another.

According to a preferred embodiment, the connection body can have a protective geometry in the area of the locking section to protect a high-frequency contact arrangement. This is designed in particular to protect the at least one high-frequency contact element from damage when the high-frequency tool is inserted into the instrument base. When the HF tool is inserted into the instrument base, the tie rod head in particular comes into contact with the locking section. The protective geometry ensures that the HF contacts present on the HF contact arrangement are not damaged by bringing the pull rod closer or by contact with the pull rod.

According to an advantageous embodiment, the locking section can have a locking geometry which is designed for rotation-proof engagement with a coupling section of the rotary wheel arrangement. The locking geometry can be adapted to the coupling section in terms of shape and dimensions in such a way that a fixation between the HF connection and the rotary wheel arrangement can be provided. For example, the locking geometry can be adapted to the geometry of a shaft connecting element that is inserted into the rotary wheel arrangement and guides the accessory shaft. A rotation-proof engagement can be achieved in particular by clamping and/or by snapping.

According to a further development, the protective geometry and the locking geometry can be designed integrally with one another. This means in particular that the protective geometry and the locking geometry can be formed by one and the same component or by the same components. For example, it can be an injection molded part, preferably made of a plastic suitable for surgical use. Of course, additive manufacturing would also be conceivable in further embodiments. As a result, the HF connection can be functionally integrated and yet be designed to save space and can be manufactured easily and in large quantities.

According to one embodiment, the locking geometry and/or the protective geometry can have at least one alignment projection, in particular two or more alignment projections, wherein the at least one alignment projection and the high-frequency contact arrangement are arranged adjacent to one another. As a result, the HF contact arrangement is arranged next to at least one alignment projection and projects beyond it in the longitudinal direction of the rotary wheel axis. This means that when the accessory shaft is inserted into the instrument base, it contacts the at least one alignment projection when contact is made with the HF contact arrangement. In this way, a predetermined permissible elastic deformation of the HF contact arrangement is made possible without it being damaged by excessive deformation.

According to an advantageous embodiment, the high-frequency contact arrangement can have two or more high-frequency contact elements pre-assembled on the locking section, wherein the alignment projections and the high-frequency contact elements are arranged next to one another, preferably alternately, on the locking section, so that the contact elements each are arranged in a space between the alignment projections. This allows, on the one hand, the HF contact elements to be correctly aligned in a pre-assembled HF connection and, on the other hand, to be arranged in the gaps to protect them from excessive deformation. The arrangement in the gaps means that even small tolerances can be correctly compensated for during assembly, since the freedom of movement of the HF contact elements is limited by the size of the gaps.

According to a further development, for the rotational alignment of the connection body and the rotary wheel arrangement in the instrument base, at least one engagement element can be arranged on the connection body, in particular at a transition from the locking section to the alignment section, which can be contacted with a corresponding coupling element of the rotary wheel arrangement and/or the instrument base . As a result, the HF connection can be aligned with respect to the rotary wheel arrangement by clamping and/or by snapping.

According to one embodiment, the connection body can have a plug section that can be connected in the direction of the connection axis and to which the contact arrangement is conductively coupled. This allows the surgical instrument to be connected to an RF source.

According to one embodiment, the plug section can have at least one plug pole and a high-frequency contact element that is made from a bent sheet metal part. A bent sheet metal part is elastic and can deflect into the spaces between the alignment projections, for example in the event of an overload. This allows the contact element to be protected from plastic deformation caused by an overload.

According to one embodiment, the at least one high-frequency contact element of the contact arrangement and the at least one high-frequency contact element of the plug section can be made from a common continuous bent sheet metal part. For this purpose, the high-frequency contact element can be arranged, for example, on a distal side of the locking section. The bent sheet metal part can, for example, be guided through the locking section and be designed to protrude from the locking section on two opposite sides of the axis of rotation. Thus, several contact elements on opposite sides can still be provided in one piece on the locking section for contacting the accessories, for example via the shaft.

According to one embodiment, the plug section can have a, in particular solid, steel core inside, preferably in the form of a turned part made of solid material. The HF connection is particularly robust because the steel core provides high structural stability.

According to one embodiment, the steel core can form a second plug pole and a second high-frequency contact element designed as a bent sheet metal part can be materially connected, in particular welded, to the steel core to form a low-resistance connection. In particular, for a bipolar design, the second bent sheet metal part can be designed to contact a second pole of the accessory, for example via a transmission element of the accessory, in particular the pull rod. For this purpose, the second high-frequency contact element designed as a bent sheet metal part can be arranged on a proximal side of the locking section. Overall, an HF connection can be formed that requires little installation space because one component fulfills several functions. In particular, the two power poles can be arranged on the connection body to save space.

The above configurations and further developments can be combined with one another in any way, if it makes sense. Further possible refinements, further developments and implementations of the invention also include combinations of features of the invention described previously or below with regard to the exemplary embodiments that are not explicitly mentioned. In particular, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the present invention.

CONTENTS OF THE DRAWING

• 1 eine Ausführung eines Schaftverbindungselements einer Verbindungsvorrichtung;
• 2 eine weitere Ausführung eines Schaftverbindungselements einer Verbindungsvorrichtung;
• 3 eine Ausführung einer Aufnahmeeinrichtung;
• 4 die Aufnahmeeinrichtung aus 3 mit eingeschobenem Schaftverbindungselement;
• 5 die Aufnahmeeinrichtung aus 3 mit eingeschobenem Schaftverbindungselement und Zugstange;
• 6 eine Verbindungsvorrichtung mit nicht passenden Elementen;
• 7 eine Verbindungsvorrichtung mit nicht passenden Elementen;
• 8 eine Verbindungsvorrichtung mit nicht passenden Elementen;
• 9 eine Ausführungsform einer Anschlussanordnung;
• 10 eine weitere Ansicht der Ausführung aus 9;
• 11 eine Ausführungsform eines Anschlusskörpers;
• 12 eine weitere Ansicht der Ausführung aus 11;
• 13 eine Ausführung einer Instrumentenbasis mit Hoch-Frequenz-Anschluss;
• 14 eine Detailansicht der Ausführung nach 13 mit Detailansicht einer Ausführung des Hoch-Frequenz-Anschlusses;
• 15 eine Ausführung einer Kopplung des Zugstangenkopfes mit dem Handgriffelement;
• 16 eine Ausführung einer Verbindungsvorrichtung in einer Detailansicht;
• 17 eine Ausführung eines chirurgischen Instruments;
• 18 eine weitere Ausführung einer Verbindungsvorrichtung in einer Detailansicht;
• 19 eine Ausführung eines Schaftverbindungselements angeordnet an einem Zubehörschaft.

The present invention is explained in more detail below using the exemplary embodiments given in the schematic figures of the drawing. It shows:

• 1 an embodiment of a shaft connecting element of a connecting device;
• 2 a further embodiment of a shaft connecting element of a connecting device;
• 3 an embodiment of a recording device;
• 4 the recording device 3 with inserted shaft connecting element;
• 5 the recording device 3 with inserted shaft connecting element and pull rod;
• 6 a connecting device with mismatched elements;
• 7 a connecting device with mismatched elements;
• 8th a connecting device with mismatched elements;
• 9 an embodiment of a connection arrangement;
• 10 another view of the execution 9 ;
• 11 an embodiment of a connection body;
• 12 another view of the execution 11 ;
• 13 a version of an instrument base with a high-frequency connection;
• 14 a detailed view of the execution 13 with a detailed view of a version of the high-frequency connection;
• 15 an embodiment of a coupling of the tie rod head with the handle element;
• 16 an embodiment of a connecting device in a detailed view;
• 17 an embodiment of a surgical instrument;
• 18 a further embodiment of a connecting device in a detailed view;
• 19 an embodiment of a shaft connecting element arranged on an accessory shaft.

The accompanying figures of the drawing are intended to provide a further understanding of the embodiments of the invention. They illustrate embodiments and, in connection with the description, serve to explain principles and concepts of the invention. Other embodiments and many of the advantages mentioned arise with regard to the drawings. The elements of the drawings are not necessarily shown to scale to one another.

In the figures of the drawing, identical, functionally identical and identically acting elements, features and components - unless otherwise stated - are each provided with the same reference numerals.

DESCRIPTION OF EMBODIMENTS

1 shows an embodiment of a shaft connecting element 3 of a connecting device 1. The shaft connecting element 3 is designed to connect an accessory shaft 4 to an instrument base 5 (not shown). The shaft connecting element 3 is designed as a hollow body 8 for the passage of a transmission element guided in the accessory shaft 4, such as a pull rod (not shown). The shaft connecting element 3 has a first shape coding dimension and a second shape coding dimension. These are in the version shown 2 characterized, for example, by a diameter D and a length L.

The first and second shape coding dimensions are dimensioned such that they are compatible with a first and a second shape coding dimension of a receiving device 18 of an instrument base 5, shown for example in 3 , correspond if the shaft connecting element 3 and the instrument base 5 belong to a common system and are intended to be connectable in an assembled state. However, if the shaft connecting element 3 and the instrument base 5 are not designed to correspond, they cannot be inserted into one another and cannot be coupled. The coupling or fixation between the shaft connecting element 3 and the instrument base 5 or the receiving device 18 can take place, for example, with a projection 15 on the shaft connecting element 3, this is in detail in the 5 until 8th shown.

As in 1 recognizable, there is a cover 37 with a so-called 4 x 90° geometry on the accessory shaft. This means that four depressions are arranged along the circumference on the cover, which form into a counter contour on a rotary wheel arrangement 30, shown in 3 ff. and 16 , can intervene.

3 shows an embodiment of a receiving device 18. The receiving device 18 is arranged on a shaft opening 19 of an instrument base 5 and has a first and second shape coding dimension. A detailed representation of the shape codes can be found, for example, in 18 shown. A first shape coding dimension can, for example, be a smallest inner diameter D' and a second shape coding dimension can be an intended shortest distance L' between a locking means 13 and a stop 20. Consequently, for a corresponding connection, the dimensions D and L must match or correspond to the dimensions D' and L', so that a shaft connecting element 3 with an accessory shaft 4 can be mounted in an instrument base 5.

4 shows the recording device 3 with inserted shaft connecting element 3.

The locking means 13 is designed as a spring-loaded detent integrated into the rotary wheel arrangement 30, which is designed to engage with the shaft connecting element 3. By way of example, the catch has a through opening through which the shaft connecting element 3 can be passed. An outer head section 40 of the detent is provided as an actuation section, while a spring 42 biasing the detent is arranged on a foot section 41.

It can be seen that the shaft connecting element 3 is designed to be too long for the receiving device 18, so that the locking means 13 cannot lock with the projection 15. Securing the shaft connecting element 3 in the longitudinal direction 14 of the surgical instrument is therefore not possible. A connection between the shaft connecting element 3 and the receiving device 18 is therefore not possible in this embodiment. This can be the case, for example, if mismatching elements of de-energized and live surgical instruments are to be incorrectly connected.

5 shows the recording device 4 with inserted shaft connecting element 3 and pull rod 7. The pull rod 7 touches the through opening 11, but cannot penetrate it. Consequently, a diameter D2 of the through opening 11 represents a third shape coding dimension of the receiving device 18, and a diameter D3 of the pull rod 7, which is designed as a transmission element for electrical contacting, represents a third shape coding dimension of the shaft connecting element 3.

The diameter of the transmission element, i.e. H. In this case, the diameter D3 of the tie rod 7 or the tie rod head 10 can be, for example, between 2 mm and 2.5 mm. The diameter D2 of the through opening 11 can therefore be, for example, between 2.1 mm and 2.3 mm, so that a tie rod head 10 with a larger diameter cannot be guided through the through opening 11. In this way, coding can be provided for different instrument systems. Advantageously, the tie rod head 10 that is too large first touches the stop 20 or the through opening 11 that is too small, so that a faulty combination can be recognized very early by a user through a protruding shaft connecting element 3. In particular, damage caused by excessive force can be avoided.

6 also shows a connecting device 1 with non-matching elements. The diameter of the shaft connecting element 3 is more than a diameter of the receiving device 18 and can therefore not intervene in the diameter of the receiving device 18. For example, the diameter can be about 0.1 mm to 1 mm larger, preferably 0.1 mm to 0.5 mm, preferably 0.1 mm to 0.3 mm, for example 0.2 mm. In this case, the diameter of the shaft connecting element 3 could be, for example, 8 mm and therefore not interfere with the diameter of the receiving device 18 with a dimension of 7.8 mm. The blocking areas are shown with dashed circles.

7 shows another connection device 1 with non-matching elements. In this case, the diameter of the tie rod head 10 is too large for the diameter of the through opening 11. This corresponds to the case as in 5 .

8th shows another connection device 1 with non-matching elements. The shaft connecting element 3 can, for example, be at least 1 mm, in particular 1 mm to 5 mm, preferably 1 mm to 3 mm, for example 2 mm, longer than the distance between the stop 20 and the locking means 13 of the receiving device 18. In this case, it can be, for example, a Have a length of 26 mm, the distance between the stop 20 and the locking means 13 of the receiving device 18 being only 24 mm. Consequently, the shaft connecting element 3 cannot be fixed in the receiving device 18.

Each of the embodiments of the 6 until 8th represent different shape coding dimensions. So shows 6 for example a first shape coding dimension and 8th a second shape encoding dimension. The situation in 7 may represent a third shape encoding dimension.

9 and 10 show an embodiment of a connection arrangement 100. The instrument base 5 is for controlling and/or operating a high-frequency tool 2, for example shown in 17 , educated.

A high-frequency connection 17 mounted in the instrument base has a connection body 16. The connection body 16 has an alignment section 22, which serves for the predetermined alignment of the HF connection 17 on a connection axis H within the instrument base 5. Furthermore, the connection body has a locking section 21 for connection to a rotary wheel arrangement 30 of the surgical instrument at a predetermined angle of a rotary wheel axis DR to the connection axis H. The rotary wheel arrangement 30 has a coupling section 31 for coupling to the connecting body 16. Through the coupling, the rotary wheel arrangement 30 can be aligned in the predetermined rotary wheel axis DR with respect to the connection axis H in the instrument base 5.

For rotational alignment of the connecting body 16 and the rotary wheel arrangement 30, there is at least one in the instrument base 5 10 shown engagement element 25 arranged, which can be connected to the coupling element 31 in an engaging or coupling manner.

The receiving device 18 can be designed to be pre-assembled. For example, the rotary wheel arrangement 30 can be manufactured pre-assembled with corresponding receiving elements 9, which in particular have the shape coding dimensions, as a specially coded version. During assembly, the rotary wheel arrangement 30 and the HF connection 17 can be inserted into the instrument base 5 from different directions. The coupling can take place without visibility through the predetermined axes H and DR or their predetermined angles.

By means of a locking geometry 27, the two assemblies can finally be connected to one another in the instrument base 5 without any additional aids. At the same time, an alignment of the RF connection 17 and the recording device 18, i.e. H. the rotary wheel arrangement 30, without any aids. The alignment ensures that the HF contacts are aligned concentrically to the inserted accessory shaft 4, the axis of which is defined by the rotary wheel arrangement 30. Tolerance compensation of the components can also take place to a certain extent.

Advantageously, the axes H and DR are always the same and arranged at a predefined angle to one another in order to ensure proper functioning of the surgical instrument. In particular, this avoids a misalignment, which could lead to contact problems during power transmission or to the pull rod 7 rubbing or even blocking.

For assembly, for example, the rotary wheel arrangement 30 can first be partially, in particular minimally, screwed into the instrument base 5 via a thread 43. The HF connection 17 can then be inserted into the instrument base 5. The rotary wheel arrangement 30 is then advantageously completely screwed into the instrument base 5. When the HF connection 17 comes into contact with the receiving device 18 (with the rotary wheel arrangement 30), these are aligned with one another. Since HF contact elements 23 are pre-assembled on the HF connection 17, any axial misalignments that may occur can be tolerated or compensated for. Through pre-assembly, complex and complex designs can still be implemented, which can still be assembled comparatively easily due to their easy accessibility and/or can be designed with a comparatively small number of connection points.

11 and 12 show an embodiment of a connection body 16 of an RF connection 17. The connection body 16 has a locking section 21 and an alignment section 22. In the area of the locking section 21, a protective geometry 26 is provided to protect the HF contact arrangement. Consequently, the protective geometry 26 can protect the HF contact elements 23 from damage when inserting the HF tool 2, in particular when inserting the shaft and/or the pull rod.

The protective geometry 26 can be formed by a plurality of alignment projections 24, with the alignment projections 24 and the HF contact elements 23 being arranged adjacent and alternating to one another. Consequently, the contact elements 23 are each placed in a kind of gap between the alignment projections 24. For example, if an incompatible accessory shaft with an incompatible tie rod head 10 is inserted into the instrument base 5, it touches the surfaces of the alignment projections 24, thereby avoiding damage to the HF contact elements 23. Furthermore, it is possible for the HF contact elements 23 to spring into the spaces between the alignment projections 24 in the event of an overload, so that they are not destroyed or rendered unusable by plastic deformation. Furthermore, the alignment and position of the HF contact elements 24 can be ensured by the protective geometry 26.

The alignment projections 24, together with the engagement element 25, also form a locking geometry 27, which is designed for rotation-proof engagement with the rotary wheel arrangement 30. In particular, the receiving device 18 can have not only a rotary wheel arrangement 30, but also at least one receiving element 9, which can also come into contact with the locking geometry 27 and have a fixing effect. Such a receiving element 9 can be designed in several parts and is, for example, in 18 shown in an exemplary embodiment.

13 shows an embodiment of an instrument base 5 with an HF connection 17, the assemblies mounted with the instrument base 5 also being shown individually.

The HF connection 17 is designed as a pre-assembled plug-in module for modular installation and removal in the instrument base 5. For this purpose, the HF contact elements 23 are also pre-assembled on the plug-in module. The plug-in module can thus be inserted and mounted into the instrument base 5 along a connection axis H.

Furthermore, a removable thumb ring 34 is arranged on the instrument base.

The rotary wheel arrangement is mounted or screwed in along the rotation axis DR.

14 shows a detailed view of the high-frequency connection 17, once in the mounted position and once insulated. The connection body 16 has a plug section 39 which can be connected in the direction of the connection axis H and to which the HF contact arrangement is conductively coupled. The plug section 39 can have at least one plug pole 28 and an HF contact element 23 that is made from a coherent bent sheet metal part.

In the area of the through opening 11, in the illustration on a side facing away from the locking section 21, further HF contact elements 23 'are arranged, which serve to contact the pull rod 7. Each one HF contact element 23 and one HF contact element 23 'can be made from a continuous bent sheet metal part. The plug section 39 can also have a solid steel core inside, which, for example, forms a second plug pole 29 and is welded to the HF contact element 23 '.

The recording device 18 and the HF connection 17 can be inserted into the instrument base 5 from different sides, for example shown in 13 . Both assemblies are structurally designed in such a way that they are functional and can be assembled or replaced in a modular manner with a minimum number of components. For example, the steel core protects against damage and is therefore particularly robust during use. Advantageously, the contact resistances within the HF connection 17 are produced by a cohesive connection, for example by welding, and are therefore designed to have a very low resistance. The components 17 and 18 can therefore be pre-assembled completely independently and then inserted and used directly into the instrument base 5 in the sense of a “plug-and-play” assembly.

15 shows an embodiment of a coupling of the tie rod head 10 with an actuating part of the instrument base 5. The tie rod 7 with the tie rod head 10 is passed through the through opening 11 in the connecting body 16 and guided up to a coupling area 33 of the actuating element designed here as a thumb ring 34. The thumb ring 34 forms a movable handle leg and has a ball receptacle in the coupling area 33. This ball receptacle can be integrated in a form-fitting manner when producing the thumb ring 34, in particular by an injection molding process. The tie rod head 10 can be accommodated in this ball receptacle and thus transmit a movement, in particular for opening and closing the accessory insert 12, such as a scissor tool, from proximal to distal.

16 shows an embodiment of a connecting device 1 in a detailed view.

Like regarding 1 explained, there is a cover 37 with a so-called 4 × 90 ° geometry on the accessory shaft. The four recesses 44 provided along the circumference on the cover 37 can engage in the counter contour on the rotary wheel arrangement 30. The counter contour on the rotary wheel arrangement 30 is formed by protruding pins 45 corresponding to the recesses 44; two of four pins 45 can be seen in the view.

17 shows an embodiment of a surgical instrument 50.

The surgical instrument 50 has an accessory insert 12 in the form of an HF tool 2 at the distal end. The accessory shaft 7 runs from the distal end proximally to the instrument base 5. There the accessory shaft 4 is accommodated in the instrument base 5 as a receiving device via the rotary wheel arrangement 30.

Furthermore, an HF connection 17 is inserted into the instrument base 5 on a different axis. The HF connection 17 is attached at an angle of 45° on the top of the instrument base 5 and thus leads the high-frequency cable away from the operating field.

An actuating element, here the thumb ring 34, is also mounted on the side of the instrument base 5 opposite the accessory shaft 4. With the actuating element positioned horizontally, i.e. H. Here with the thumb ring 34 positioned horizontally, the accessory shaft can be decoupled from the actuating element, in particular the tie rod head can then be removed from the ball head receptacle.

The rotary wheel arrangement 30 has the locking means 13 already explained. When the actuating element is positioned horizontally, simply pressing a button on the head section 41 of the locking means 13 is sufficient to separate the accessory shaft 4 from the actuating element. The rotary wheel arrangement 30, here by unscrewing, and the HF connection 17, here by pulling out, can then also be removed in a modular manner from the instrument base 5 for dismantling.

18 shows a further embodiment of a connecting device 1 with a detailed view of the receiving device 18.

In this embodiment, the receiving device 18 of the rotary wheel arrangement 30 has a receiving element 9 which is designed in several parts. The receiving device 18 can thus be formed from several sleeve-shaped elements that are fixed together. When assembled, individual elements can rotate within the instrument base 5, others can be fixed with it. In particular, the sleeve-shaped element 46 shown in the middle, which has the greatest extent in the longitudinal direction 14, can be screwed to the instrument base 5 via the thread 43. The other sleeve-shaped elements rotate when the rotary wheel of the rotary wheel arrangement 30 is adjusted.

The rotary wheel 47 and the locking means 13 of the rotary wheel arrangement 30 can also be seen on the left side of the illustration. In the exploded view shown, the locking means 13 is shown detached from the rotary wheel 47.

In the distal opening of the rotary wheel arrangement 30, the pin elements 45 integrated therein can be seen, which are inserted into the recesses 44 of the cover 36, shown in 1 , can intervene.

In this embodiment, the first and second shape coding dimensions are formed by the plurality of elements in the assembled state. These are shown schematically by a maximum diameter D' and a maximum length L', indicated by dashed lines and of course adjusted when installed.

19 shows an embodiment of a shaft connecting element 3 arranged on an accessory shaft 4.

In the connecting device shown here, the pull rod 7 runs in the accessory shaft 4. An insulating coating 38 is provided on the outside of the accessory shaft 4, for example a Halar coating (ECTFE).

A seal 37 is provided between the accessory shaft 4 and the cover 36, for example in the form of a sealing lip. The projection 15 can be seen on the shaft connecting element 3, which represents a measure for the first and second shape coding dimensions. These are characterized by the diameter D and the length L.

The seal 37, the cover 36 and the shaft connecting element 3 can form a two-component insert injection molded part.

Although the present invention has been fully described above using preferred exemplary embodiments, it is not limited to this but can be modified in a variety of ways. In particular, the shaft connecting element 3 can have a geometry that deviates from that shown. Furthermore, the receiving device 18 can have a geometry that deviates from the embodiment shown, in particular through differently shaped individual elements, such as individual shaped receiving elements 9. Likewise, the coupling between the rotary wheel arrangement 30 and the cover 36 can be designed differently.

Reference symbol list

1

Connection device

2

High frequency tool

3

Shaft connecting element

4

accessory shaft

5

Instrument base

6

Leadership element

7

pull bar

8th

Hollow body

9

Recording element

10

Tie rod head

11

Passage opening

12

Accessory insert

13

Rest means

14

Longitudinal direction

15

head Start

16

Connection body

17

High frequency connection

18

Reception facility

19

shaft opening

20

attack

21

Locking section

22

Alignment section

23

High-frequency contact element

24

Alignment projection

25

engagement element

26

Protection geometry

27

Locking geometry

28

Plug pole

29

second plug pole

30

Rotary wheel arrangement

31

Coupling section

32

Handle

33

Coupling area

34

Thumb ring

35

Insulation element

36

cover

37

poetry

38

Coating

39

Connector section

40

Head section

41

foot section

42

Feather

43

thread

44

deepening

45

Cones

46

sleeve-shaped element

47

Rotary wheel

50

surgical instrument

100

Connection arrangement

D

diameter

D2

diameter

D3

diameter

L

length

DR

Rotary wheel axle

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102017124775 A1 [0006]

Claims (15)

High-frequency connection (17) for a surgical instrument, comprising: a connection body (16) which has a locking section (21) and an alignment section (22), the alignment section (22) having a connection axis (H) of the high-frequency -Connection (17) is defined and the locking section (21) is designed for connection to a rotary wheel arrangement (30) of the surgical instrument at a predetermined angle of a rotary wheel axis (DR) to the connection axis (H), wherein in the area of the locking section (21) one a high-frequency contact arrangement connected to the connection body (16) is provided, which is designed to contact a high-frequency tool (2) of the surgical instrument within an instrument base (5), and wherein the high-frequency connection (17) is designed as a pre-assembled plug-in module for modular installation and removal in an instrument base (5) of the surgical instrument. High-frequency connection (17). Claim 1 , characterized in that the connecting body (16) has a through opening (11) in the area of the locking section (21), which is used to guide a transmission element, in particular a pull rod (7), of a high-frequency tool that can be passed through the rotary wheel arrangement (30). (2) is trained. High-frequency connection (17). Claim 2 , characterized in that the high-frequency contact arrangement has at least one high-frequency contact element (23 ') arranged in the area of the through opening (11), in particular on a side facing away from the locking section (21), which is used to contact the transmission element, in particular the pull rod (7) is formed. High-frequency connection (17) according to one of the preceding claims, characterized in that the high-frequency contact arrangement has at least one high-frequency contact element (23) for contacting an accessory shaft (4) of the high-frequency tool (2) having. . High-frequency connection (17) according to one of the preceding claims, characterized in that the connection body (16) in the area of the locking section (21) has a protective geometry (26) to protect the high-frequency contact arrangement, which is in particular to protect the at least one high-frequency contact element (23) is designed to prevent damage when the high-frequency tool (2) is inserted into the instrument base (5). High-frequency connection (17) according to one of the preceding claims, characterized in that the locking section (21) has a locking geometry (27) which is designed for rotation-proof engagement with a coupling section (31) of the rotary wheel arrangement (30). High-frequency connection (17). Claim 5 and 6 , characterized in that the protective geometry (26) and the locking geometry (27) are formed integrally with one another. High-frequency connection (17) according to one of the Claims 5 until 7 , characterized in that the locking geometry (27) and / or the protective geometry (26) has at least one alignment projection (24), in particular two or more alignment projections (24), wherein the at least one alignment projection (24) and the high-frequency Contact arrangement are arranged adjacent to each other. High-frequency connection (17). Claim 8 , characterized in that the high-frequency contact arrangement has two or more high-frequency contact elements (23) pre-assembled on the locking section (21), the alignment projections (24) and the high-frequency contact elements (23) next to one another, preferably alternately, are arranged on the locking section (19), so that the contact elements (23) are each arranged in a space between the alignment projections (24). High-frequency connection (17) according to one of the preceding claims, characterized in that for the rotational alignment of the connection body (16) and the rotary wheel arrangement (30) in the instrument base (5) at least one engagement element (25), in particular at a transition from the locking section (21) to the alignment section (22), on which the connecting body (16) is arranged, which can be contacted with a corresponding coupling element (31) of the rotary wheel arrangement (30) and/or the instrument base (5). High-frequency connection (17) according to one of the preceding claims, characterized in that the connection body (16) has a plug section (39) which can be connected in the direction of the connection axis (H) and to which the contact arrangement is conductively coupled. High-frequency connection (17) according to one of the preceding claims, characterized in that the plug section (39) at least has a plug pole (28) and a high-frequency contact element (23) which is made from a bent sheet metal part. High-frequency connection (17) according to one of the preceding claims, characterized in that the at least one high-frequency contact element (23) of the contact arrangement and the at least one high-frequency contact element (23 ') of the plug section (39). are made from a common, continuous bent sheet metal part. High-frequency connection (17) according to one of the Claims 11 until 13 , characterized in that the plug section (39) has a, in particular solid, steel core inside, preferably in the form of a turned part made of solid material. High-frequency connection (17) according to one of the Claims 12 until 14 , characterized in that the steel core forms a second plug pole (29) and a second high-frequency contact element (23) designed as a bent sheet metal part is materially connected, in particular welded, to the steel core to form a low-resistance connection.

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