Medical tools with connectivity recognition and medical tools with decoupling recognition

Abstract

The present invention relates to a medical tool (1) configured as a rotatably driven tool, particularly as a cutting tool, preferably as a trephine tool, and having a drive section (3) connectable to a medical device (2) for torque transmission in particular form-fitting, and a cutting section (4) torque-transmittably coupled to the drive section (3), characterized in that the tool (1) has an electronic structure group (7) configured to be activated by connecting the tool (1) to the medical device (2), preferably by an insertion process of inserting the tool (1) into the medical device (2), and / or by decoupling the cutting section (4) from the drive section (3).

Description

Technical Field

[0001] This disclosure relates to a medical tool configured as a rotatably driven tool, particularly as a cutting tool, preferably as a trephine, and the medical tool having a drive section that is connectable to a medical device, preferably a surgical handpiece, for torque transmission in particular form-fitting purposes, and a cutting section that is torque-transmittingly coupled to the drive section. Background Technology

[0002] A surgical opening is made in the skull using a trephine tool. To avoid damage to the dura mater located beneath the skull, the trephine tool is functionally constructed such that once the skull is penetrated and before the dura mater beneath the skull can be damaged, the cutting segment is decoupled from the actual actuator, i.e., the drive segment. This is typically achieved, for example, in tools of the type described in US 4,456,010 A1, by allowing the cutting segment to be axially restricted between a first and a second axial position relative to the drive segment, in which the cutting segment and drive segment are torque-coupled, and in the second axial position, the cutting segment is torque-decoupled from the drive segment. In the cutting engagement, the cutting segment is held in the first (torque-coupled) axial position by the cutting force acting upon it, substantially overcoming the spring force of the spring, particularly overcoming the spring preload of the button. If the cutting force does not act on the cutting section, the cutting section is displaced into a second (torque-decoupled) axial position, for example, by the spring force, and especially by a button preloaded (forward) by the spring. Because once the skull is penetrated, i.e., once the trephine process has been completed, the cutting force will not react on the cutting section, so the compressed spring immediately releases the torque engagement between the drive section and the cutting section. Therefore, the cutting section is preloaded by the spring into the torque-decoupled axial position.

[0003] Tools, especially trephine tools, can be constructed as reusable tools, i.e., tools suitable for multiple uses with rework capabilities. Alternatively, (trephine) tools can be constructed as disposable tools (also known as single-use tools), that is, tools suitable for single-use / disposable use.

[0004] For users, it is typically not easy to identify which tool is involved, such as the type, size, and / or type of use—reusable or disposable. To date, it has also been impossible to automatically identify medical tools, such as handheld tools or tools used in surgical (handheld) instruments. To identify a tool, manual inspection of labels or packaging is necessary. Therefore, it is impossible to rule out misuse of the tool used, such as the use of incorrect tool parameters and / or the use of tools unsuitable for the corresponding medical application. Due to the lack of automated recording, it is also impossible to understand the tool combinations used or misuse, such as due to tool overload, and related product damage. Furthermore, tool inventory cannot be monitored without time-consuming inventory checks. Moreover, the functionality and normal condition of tools must be checked before use. This requires manually pulling on the tool used for checking couplings to verify the reliable connection of all products to be used, especially the reliable fit of the tool in the handpiece; however, this implies a potential risk of injury.

[0005] Therefore, the objective of this invention is to avoid or reduce the disadvantages of the prior art and to provide a medical tool, particularly a trephine tool, that enables automated tool identification and / or automated tool recording and thus reduces the risk of potential tool misuse. Summary of the Invention

[0006] The above-mentioned task is solved by means of the subject matter of the present invention.

[0007] More precisely, the objective of this invention is achieved through a medical tool configured as a rotatably driven tool, particularly a cutting tool, preferably a trephine, and having a drive section (torque input section) connectable to a medical device for torque transmission, particularly for shape fitting, and a cutting section coupled to the drive section for torque transmission. The tool has a (first) electronic structure assembly configured to be activated by an insertion process, specifically by connecting the tool to the medical device, into the medical device. Thus, such a tool is equipped with an electronic structure assembly for detecting information. Here, the electronic structure assembly can be automatically activated by inserting the tool into the medical device.

[0008] In other words, the tool (trephine) has an integrated electronic structure assembly that is activated / operated when the tool is connected / coupled to the device (surgical handpiece), especially when inserted into the device, and deactivated / unoperated when the tool and device are not connected / decoupled, especially when the tool is not inserted into the device. That is, the activation of the electronic structure assembly depends on the coupling of the tool and device, thus advantageously, tool coupling can be automatically identified. This also has the advantage that reliable engagement between the tool and device no longer needs to be checked manually, for example, by pulling on the tool, because feedback on successful coupling can be provided by activating the electronic structure assembly.

[0009] According to an advantageous improvement, the electronic structure assembly can have a storage device in which tool-specific data is stored, such as tool operating parameters, tool status data, application parameters, serial number, item number, shelf life (MHD), batch number (LOT), and / or other information. This tool-specific data is preferably transmitted and / or output to an external processing unit and / or the user of the tool when the electronic structure assembly is activated. That is, tool-specific data, particularly for tool identification, can be detectably provided externally when the electronic structure assembly is activated. In other words, activation of the electronic structure assembly can transmit and further process the stored data, thereby providing automatic tool identification. The processing unit can be, for example, a terminal device such as a tablet or smartphone, or a control device or an Internet-based platform such as the cloud. Automatic recording can be simultaneously achieved through automatic tool identification. Furthermore, personalized tool parameters, such as rotation speed or current, can be automatically set based on the transmitted tool-specific data, preventing misuse. Additionally, multiple uses of the tool can be detected, for example. Therefore, for example, if a tool is intended for single use but has already been used, the user can be notified. This information is stored. The user can also be informed during surgery if necessary.

[0010] According to a preferred embodiment, the first electronic structure assembly can be arranged within the fixed component of the tool. This has the advantage that the electronic structure assembly does not need to be rotated during machining.

[0011] According to a preferred embodiment, the electronic assembly may include a switch that can be mechanically actuated via a tool connection. In other words, the switch is constructed on a drive section of the tool to be connected to the device, such that the switch protrudes (axially or radially) from the drive section in the unoperated state and is displaced relative to the drive section by connecting the drive section to the medical device, particularly by being pressed into the drive section to actuate the switch. Preferably, the drive section has a standardized interface, such as a Hudson connector. By arranging the mechanically actuated switch on the drive section, the switch is automatically actuated when the tool is inserted into the medical device, as the tool must be precisely accommodated by the device to ensure a reliable fit. Therefore, in use with each (conventional) device, the switch is mechanically actuated as long as the drive section is against the device in the area of ​​the switch. Because the interface between the tool and the device is typically standardized, activation of the electronic assembly is independent of other structures of the device.

[0012] According to an advantageous improvement of the preferred embodiment, the switch can be mechanically operated via the tool connection such that the switch closes the circuit of the electronic structure assembly in the operated switch position and opens the circuit in the unoperated switch position. Preferably, the electronic structure assembly has a communication device for establishing a radio connection that transmits radio signals carrying tool-specific data when the electronic structure assembly is activated, i.e., when the circuit is closed. For example, the communication device can actively transmit radio signals, such as via WLAN or Bluetooth Low Energy (BLE) or via low-power wireless network protocols such as LoRaWAN, or passively, such as via RFID or NFC. The radio signals can also be transmitted via other radio standards suitable for (contactless) data transmission and are not limited to any of the aforementioned radio standards or any particular frequency range. When the circuit is interrupted when the tool is decoupled from the device, the communication device no longer transmits radio signals or, in the case of passive technology, can no longer be reached. In other words, the electronic structure assembly may, for example, have an RFID chip, an NFC chip, a WLAN module, and / or a Bluetooth Low Energy chip, which are respectively configured to transmit radio signals to a receiver located in the surrounding environment of the tool when the electronic structure assembly is activated. The receiver can forward data transmitted via radio signals to other terminal devices. According to another preferred improvement of the preferred embodiment, the communication device can be housed within the tool's plastic casing, thereby advantageously providing radio penetration.

[0013] According to a preferred embodiment, the switch can be axially displaced by connecting the tool between an operated switch position and an unoperated switch position. The insertion direction of the tool generally corresponds to the axial direction, thereby enabling axial operation of the switch in a simple manner. The switch preferably protrudes from an axial stop surface of the tool, against which the device rests in the coupled state. This ensures that the switch is operated only in the end position of the tool within the device, in which the tool and device are axially fixedly connected, to prevent activation of the electronic assembly before the insertion process is complete and the tool is reliably engaged.

[0014] According to an alternative preferred embodiment, the switch can be radially displaced by connecting the tool between the operated switch position and the unoperated switch position. Preferably, the switch protrudes from the radially outer circumferential surface of the drive section, and the device rests against this radially outer circumferential surface in the coupled state. Since the drive section is typically inserted into the device such that it rests radially outer against the radially inner diameter of the device, automatic operation can be ensured by connecting the tool to the device in the case of a radially operated switch.

[0015] According to a preferred embodiment, the electronic assembly may have a feedback device and / or be connectable to an external feedback device. The feedback device and / or feedback device may be configured to output auditory and / or visual feedback when the electronic assembly is to be activated or has been activated. Thus, the user receives automatic confirmation of a successful connection, eliminating the need to check for a reliable fit by touch. The feedback device may be configured, for example, as a light-emitting device, such as an externally visible LED preferably in the drive section, and / or as an auditory signal transmitter, providing feedback on whether the tool is (correctly) connected to the device, i.e., confirming a successful connection. For example, the external feedback device may be configured, particularly as a control device or terminal device coupled via a wireless connection, such as a smartphone or tablet, which provides a message regarding whether the tool is (correctly) connected to the device.

[0016] According to another aspect of the invention, which may be provided in combination with or unrelated to the foregoing aspects, the object of the invention is achieved by a medical tool configured as a rotatably driven tool, particularly a cutting tool, preferably a trephine tool, and having a drive section (torque input section) connectable to a medical device for torque transmission, particularly for shape-fitting purposes, and a cutting section torque-transmittingly coupled to the drive section. The tool has a (second) electronic structure assembly configured to be activated by decoupling the cutting section from the drive section. Specifically, the cutting section can be axially restricted between a first axial position and a second axial position relative to the drive section (e.g., a spring-loaded button), in which the cutting section and drive section are torque-coupled, and in the second axial position, the cutting section is torque-decoupled from the drive section. Here, the second electronic structure assembly is constructed and arranged such that it is deactivated in the first axial position and activated in the second axial position. In other words, the switching path between the drive section and the cut section, defined by a restricted axial relative displacement, is used to activate the electronic structure group.

[0017] The advantage of this is that the coupling and / or decoupling process of the (trephine) tool can be (automatically) detected and / or recorded. Therefore, advantageously, the number of decouplings for each procedure can be recorded together. This also has the advantage that in non-powered tools, where the sleeve is decoupled from the actual output, this decoupling can be used to close or interrupt the circuit and thus for identification, which can be advantageously applied to the digitization of (medical) tools and devices.

[0018] For example, the second electronic structure group can be mechanically switched by decoupling the cutting section from the (driving section), such that the circuit of the electronic structure group is closed (or open) in the operated switching position and open (or closed) in the unoperated switching position.

[0019] According to a preferred embodiment, the second electronic structure assembly may have a second switch preferably configured as a button, which can be mechanically operated by an actuation section rotatably coupled to the cutting section, such that the second switch detects the number of revolutions of the cutting section, particularly after the cutting section is decoupled from the drive section. For example, a button (e.g., in the form of a dome or bevel) preferably arranged on a non-rotating component of the tool can be configured such that the button is mechanically operated by an actuation section of the tool rotatably coupled to the cutting section (e.g., in the form of an outer sleeve) in accordance with the number of revolutions of the cutting section (e.g., during each revolution). According to an advantageous improvement of the preferred embodiment, the actuation section can be configured such that it is rotatably decoupled from the cutting section in a first axial position and rotatably coupled to the cutting section in a second axial position. This ensures that when the cutting section is decoupled from the drive section, the actuation section rotates only (with the cutting section). Therefore, only revolutions are detected after decoupling. Empirically, the number of (remaining) revolutions after decoupling has proven to be particularly compelling in terms of tool wear and lifespan. Preferably, the number of decoupled components and / or the number of remaining turns are stored in the storage device of the electronic structure assembly and / or preferably transmitted to an external processing unit in combination with tool-specific data (such as serial numbers or item numbers). For example, information forwarding can be performed in real time or as needed (immediately). In other words, the operating section is arranged and constructed such that the second switch / button is operated in correspondence with the number of turns of the cutting section. For example, the operating section can be formed by multiple locking elements, especially locking elements arranged in a circumferential direction, such that the switch / button is operated multiple times in each turn. Therefore, incomplete turns of the cutting section can also be detected. Mechanical locking is ensured simultaneously by multiple locking elements. In other words, the number of turns corresponds, for example, to the quotient of the number of times the second switch is operated and the number of locking elements.

[0020] Preferably, the second electronic structure group, in order to establish a radio connection, may have a (second) communication device arranged in the plastic component of the tool or connected to the communication device of the first electronic structure group. It is further preferably configured such that it transmits radio signals carrying data through a decoupling process when the second electronic structure group is activated. Preferably, the second electronic structure group has a (second) storage device or is connected to the storage device of the first electronic structure group to detect the number of activated second electronic structure groups (and thus the number of decoupled cutting segments) and / or the number of (remaining) turnovers.

[0021] According to a preferred embodiment, the second electronic structure assembly can be arranged within the tool's fixed component. This has the advantage that the electronic structure assembly does not need to be rotated during machining.

[0022] According to another aspect of the invention, the drive section may have a base preferably constructed of plastic, which is particularly suitable for direct connection to a medical device, and the drive section may have a drive member preferably constructed of metal, which is axially fixed and form-fitted to resist relative rotation and connected to the base. In particular, a (first) electronic structure assembly can be arranged in the base. Alternatively, the base and drive member may be constructed of plastic. Further alternatively, the base may be constructed of metal and the drive member may be constructed of plastic.

[0023] According to a preferred embodiment, the base may have an axially fixed section, for example, in the form of a locking notch, into which a mating fixed section, for example, in the form of a locking hook, constructed on the drive member, engages for axial fixation. According to a preferred embodiment, the base may have a torque transmission section, for example, in the form of a force transmission notch, into which a mating section, for example, in the form of a web, constructed on the drive member, engages for form-fitting torque transmission. In other words, the functions of axial fixation and torque transmission are implemented on separate sections of the drive member. Preferably, the locking notches and / or force transmission notches are arranged symmetrically. According to a particularly preferred embodiment, the axially fixed section may be arranged at the distal end of the torque transmission section to achieve a suitable force flow. The torque transmission section is therefore arranged closer to the cutting section than the axially fixed section.

[0024] According to another aspect of the invention, the cutting section may have a base section preferably directly coupled to the drive section and an engagement section preferably independently constructed from the base section and carrying the cutting edge, the engagement section being axially fixed and / or anti-rotationally connected to the base section at a (first) interface, for example, in the form of a thread. Preferably, the interface is configured such that the engagement section is engaged in cutting engagement with the base section by rotation opposite to the rotation direction of the engagement section, in order to avoid accidental release caused by cutting forces. Particularly preferably, the interface is configured such that it can be connected to engagement sections of different structural types and / or sizes. Further preferably, the cutting section may have a sleeve section separately constructed from the engagement section, the sleeve section being mounted on a (second) interface on the outer diameter of the engagement section. In particular, engagement sections of different structural types and / or sizes may have the same outer diameter. By using a modular structure and the use of the same components in cases of different tool types and / or tool sizes, the manufacturing cost of the tool can be reduced.

[0025] According to another aspect of the invention, the cutting section may have a plastic dome, at which an insert forming a cutting edge is fixedly mounted, for example by hot stamping, the insert being made of metal. Thus, apart from the cutting edge formed by a metal plate, the entire (treble drill) tool can be manufactured inexpensively from plastic. Attached Figure Description

[0026] Figure 1a and Figure 1b This is a perspective view of the connection between a tool for activating an electronic structure assembly according to the first embodiment of the present invention and a medical device.

[0027] Figure 2a and Figure 2b A perspective view of a tool with a switch having an electronic structure assembly is shown in two different embodiments.

[0028] Figure 3 and Figure 4 A schematic diagram of the communication device of the tool's electronic structure assembly is shown.

[0029] Figure 5 and Figure 6 A perspective view of the tool in the first embodiment is shown.

[0030] Figure 7 Figure 10 shows a perspective view of the tool's drive section and its various components.

[0031] Figure 11 to Figure 13 This is a perspective view of various partial cross-sections of the tool in the second embodiment.

[0032] Figure 14 Figure 16 is a perspective view of the cutting sections of the tool in different sizes.

[0033] Figure 17 and Figure 18 This is a perspective view of the tool in another embodiment. Detailed Implementation

[0034] Embodiments of this disclosure are described below based on the accompanying figures. The figures are merely illustrative and are used to understand the invention. Identical elements are characterized by the same reference numerals.

[0035] Figure 1 shows a medical tool 1, which can be connected to a medical device 2, such as a surgical handpiece. Figure 1a In this process, tool 1 is not connected to medical device 2, meaning it is decoupled from device 2. Figure 1b In this embodiment, tool 1 is connected to medical device 2, that is, coupled to device 2. In the illustrated embodiment, tool 1 is configured as a rotatably driven tool. For this purpose, tool 1 is connected to device 2 to transmit torque for driving tool 1. In particular, tool 1 can be configured as a cutting tool.

[0036] Tool 1 has a drive section 3 that is partially inserted into device 2 and is form-fitted into device 2 in a way that resists relative rotation. Furthermore, tool 1 has a cutting section 4 that extends the drive section 3 in the axial direction. A cutting edge for machining is arranged on the cutting section 4. The drive section 3 has a coupling section 5 that forms part of the drive section 3 and is fully inserted into device 2 in the connected state. In the illustrated embodiment, the coupling section 5 is configured as a Hudson connector 6, which is commonly used as an interface for handheld devices.

[0037] Tool 1 has electronic structure group 7 (see Figure 3 and Figure 4 The electronic assembly 7 is configured to be activated by connecting the tool 1 to the medical device 2, preferably by the insertion process of inserting the tool 1 into the medical device 2. Preferably, the electronic assembly 7 has a switch 8 that can be mechanically operated by connecting the tool 1 such that the switch 8 closes the circuit of the electronic assembly 7 in a first switch position and disconnects the circuit of the electronic assembly in a second switch position.

[0038] exist Figure 2a In this configuration, switch 8 is constructed as an axial switch 9, which is axially movable for actuation. Axial switch 9 is arranged on the axial contact surface of coupling section 5 and protrudes axially toward device 2. Device 2, when connected to tool 1, rests against the contact surface and thus actuates axial switch 9. When tool 1 is connected to device 2, axial switch 9 is actuated. When tool 1 is not connected to device 2, axial switch 9 is not actuated. Figure 2b In this configuration, switch 8 is constructed as a radial switch 10, which is displaceable in the radial direction for actuation. Radial switch 10 has a hemispherical, dome-shaped shape. Radial switch 10 is arranged on the radial outer periphery of coupling section 5 and extends radially outward. When connected to tool 1, device 2 is pushed onto the radial outer periphery, thus actuating radial switch 10. When tool 1 is connected to device 2, radial switch 10 is actuated. When tool 1 is not connected to device 2, radial switch 10 is not actuated. Therefore, switch 8 is arranged on coupling section 5 such that it is automatically actuated mechanically by device 2 in the connected state and automatically inactive in the disconnected state.

[0039] Electronic assembly 7 may include a storage device storing tool-specific data, such as tool operating parameters, tool status data, application parameters, serial number, item number, shelf life (MHD), lot number (LOT), and / or other information. Electronic assembly 7 may also include a communication device 11 for establishing a radio connection. The communication device 11 is arranged such that when electronic assembly 7 is activated, i.e., when the circuit is closed, the communication device transmits a radio signal containing the tool-specific data stored in the storage device.

[0040] Figure 3 The possible configuration of the communication device 11 is shown, which is configured as a Bluetooth Low Energy unit 12. Alternatively, the communication device 11 can also be configured as other radio modules, such as a W-LAN module or a Lo-RA-WAN module (long-range wide area network module). In the communication device 11, when the switch 8 is actuated, the circuit is closed, and the Bluetooth Low Energy chip 13 is connected to the battery 14. When the circuit is closed, the Bluetooth Low Energy unit 12 can actively transmit radio signals to a receiver located in the environment surrounding the tool 1. When the circuit is interrupted when the tool 1 is decoupled from the device 2, the communication device 11 stops transmitting radio signals. Figure 4 The diagram illustrates alternative possible configurations of the communication device 11, which is constructed as an RFID or NFC unit 15. In the communication device 11, when the switch 8 is actuated, the circuit closes and the coil 16 is connected to the memory 17, such as an EEPROM (Electrically Erasable Programmable Read-Only Memory). Figure 3 The structure shown is different and does not require a battery; therefore, the lifespan of the electronic structure assembly 7 is independent of battery life. The RFID or NFC unit 15 can passively transmit radio signals. The memory 17 can be read via the coil 16. The radio signals can be forwarded via the NFC unit 15, for example, to a receiver arranged in device 2 and from there. Figure 3 and Figure 4 As illustrated, through the connection between tool 1 and the device, tool-specific data stored in the storage device can be forwarded to peripheral devices. There, the data is further processed and output to the user, stored in the cloud, and / or set to online.

[0041] refer to Figure 5 and Figure 6 Explain the structure of tool 1. Tool 1 can be functionally divided into drive section 3, cutting section 4, and sleeve section 18.

[0042] Drive section 3 (see also) Figure 7As shown in Figure 10, a base 19 is provided, on which a coupling section 5 is constructed. The base 19 is constructed of a plastic component. An electronic structure assembly 7 is housed in the base 19. A connecting section 20 is constructed on the proximal end of the base 19. A drive section 3 has a drive member 21, which is axially fixed to the connecting section 20 and resists relative rotation. A spring 22 is housed in the connecting section 20, and a cutting section 4 is axially displaceable between a first axial position and a second axial position against the spring force. A button 23 is axially arranged between the drive member 21 and the connecting section 20. The button 23 axially passes through a central recess in the drive member 21.

[0043] The cutting section 4 has a base section 24. This base section 24 is used for transmitting force / torque and has a drive member 25. The drive member 25 of the cutting section 4 is form-fitted into the drive member 21 of the drive section 3 in a rotationally resistant manner, thereby transmitting torque from the drive section 3 to the cutting section 4. In a first axial position, the drive member 25 is engaged with the drive member 21. The base section 24 has a first interface 26. Through this first interface 26, a first engaging section 27 of the cutting section 4 (in the form of an internal milling cutter) is connected to the base section 24 in a torque-transmitting manner. The first interface 26 is threaded, and the first engaging section 27 is preferably screwed onto the thread against the cutting / driving direction of the tool 1. In particular, the first engaging section 27 is secured by tightening torque. The base section 24 has a second interface 28. Through this second interface 28, a second engaging section 29 of the cutting section 4 (in the form of an external milling cutter) is connected to the base section 24 in a torque-transmitting manner. The second interface 28 is configured as a transverse pin, onto which the second engagement section 29 can be pushed. A groove 30 is formed in the second engagement section 29, which connects the second engagement section 29 to the transverse pin in a form-fitting manner, preventing relative rotation. The second engagement section 29 includes a radially outwardly projecting flange 31. The flange 31 is radially circumferentially constructed.

[0044] The sleeve section 18 is preferably made of plastic. The sleeve section 18 forms the outer diameter of the tool 1. The sleeve section 18 rests on the flange 31 of the cutting section 4 at its proximal end. The sleeve section 18 rests on an axial stop surface provided by the base 19 at its distal end. The sleeve section 18 has a radially inwardly projecting bolt 32 that engages in a surrounding groove 33 in the connecting section 20 and thereby axially secures the sleeve section 18.

[0045] exist Figure 6In the illustrated embodiment, the electronic assembly 7 has a feedback device 34. The feedback device 34 (in the form of an LED 35) is arranged in the base 19 and emits light when the electronic assembly 7 is activated. For example, the LED 35 may output green light when the electronic assembly is correctly coupled and red light when it is incompletely coupled. The LED 35 may also output flashing light or continuous light. The LED 35 may also emit light in other colors. The feedback device 34 may also have multiple LEDs, for example, one of which provides feedback on successful coupling and provides feedback on incorrect coupling. Alternatively or additionally, the feedback device 34 may output auditory feedback when the electronic assembly 7 is to be activated or has been activated. For example, the frequency / pitch of the auditory feedback or the time interval between multiple acoustic signals / feedbacks may differ in the case of successful coupling from that in the case of unsuccessful coupling.

[0046] Reference Figure 7 Figure 10 illustrates the structure of the drive section 3. The drive section 3 is formed, in particular, by a drive member 21 constructed of metal and a base 19 constructed of plastic. Alternatively, the base 19 and the drive member 21 may be constructed of metal. Further alternatively, the base 19 and the drive member 21 may be constructed of plastic. Additionally, the base may be constructed of metal and the drive member 21 may be constructed of plastic. The spring 22 and the button 23 are not important for the transmission of force and torque.

[0047] The base 19 and the drive member 21 are axially fixedly connected to each other. For this purpose, the base 19 has one or more locking recesses 36 into which one or more locking hooks 37 of the drive member 21 engage. The drive member 21 thus acts axially from the rear onto the base 19. The locking recesses 36 are arranged symmetrically, i.e., opposite each other in the circumferential direction. The locking hooks 37 are also arranged symmetrically, i.e., opposite each other in the circumferential direction. The base 19 and the drive member 21 are connected to each other to transmit torque. For this purpose, the base 19 has one or more force transmission recesses 38 into which one or more webs 39 of the drive member 21 engage. The force transmission recesses 38 are arranged symmetrically, i.e., opposite each other in the circumferential direction. The webs 39 are arranged symmetrically, i.e., opposite each other in the circumferential direction. The webs 39 are positioned between the locking hooks 38 in the circumferential direction. The drive component 21 has a central open section 40 through which three buttons 23 can pass for decoupling, that is, for disengaging the cutting section 4 from engagement.

[0048] Tool 1 is constructed as a trephine tool in the illustrated embodiment. (See reference...) Figure 11a and Figure 11b Explain how the treble drill works. In tool 1, the cutting section 4 can be positioned relative to the drive section 3 in a first axial position (see...). Figure 11a ) and the second axial position (see Figure 11b The cutting section 4 is axially restricted between the drive section 3 and the cutting section 4. In the first axial position, the cutting section 4 is torque-coupled with the drive section 3, and in the second axial position, the cutting section 4 is torque-decoupled from the drive section 3. Thus, the cutting section 4 can be decoupled from the actual drive. During cutting engagement, the cutting section 4 is pressed into the first axial position by the cutting force acting on it, overcoming the spring force of the spring 22. The button 23, supported in the drive section 3, is axially displaced and the spring 22 is preloaded. If the cutting force is not acting on the cutting section 4, the cutting section 4 is pressed into the second axial position by the spring force of the spring 22. By preloading the spring, the button 23 is displaced toward the cutting section 4, causing the drive member 25 (driven side / receiving torque) of the cutting section 4 to disengage from the drive member 21 (driving side / transmitting torque) of the drive section 3.

[0049] exist Figure 11b In the diagram, the axial relative movement of the switch path between the first and second axial positions is represented by a dashed circle. This axial relative movement can be used to activate the second electronic structure group 41. According to another aspect of the invention, the tool 1 includes a second electronic structure group 41, which is configured to be activated by decoupling the cutting section 4 from the drive section 3. That is, the second electronic structure group 41 is configured to be deactivated when the cutting section 4 is in the (coupled) axial position relative to the drive section 3, and activated when the cutting section 4 is in the second (decoupled) axial position relative to the drive section 3. In particular, the second electronic structure group 4 has a switch (not shown) that is mechanically operated by axial displacement of the cutting section 4, in particular the button 23.

[0050] exist Figure 12 and Figure 13Another embodiment of tool 1 is shown. The second electronic structure assembly 41 has a second switch 42. The second switch 42 is configured as a button. The second switch 42 can be mechanically operated by the cutting section 4, such that the second switch detects the number of rotations of the cutting section 4, especially after the cutting section 4 is decoupled from the drive section 3. The second switch 42 has a hemispherical, dome-shaped shape. The second switch 42 can also be configured as a beveled shape. The second switch 42 is arranged on the radial outer periphery of the drive section 3, here arranged in the region of the connecting section 20 and extending radially outward. The second switch 42 is arranged in a groove 33. The pin 32 on the sleeve section 18 serves as an operating section, such that the number of rotations of the second switch 42 corresponds to the number of rotations of the sleeve section 18, which is operated by the pin 32. In other words, the number of rotations corresponds, for example, to the quotient of the number of rotations of the second switch 42 and the number of pins 32 (locking elements). For example, the sleeve section 18 can be symmetrically constructed, that is, having two pins 32 opposite each other in the circumferential direction. Then, for each revolution of the sleeve section 18, the second switch 42 is actuated twice. Thus, half a revolution of the sleeve section 18 can also be detected. The mechanical locking is simultaneously ensured by multiple bolts 32. This allows the number of revolutions of the sleeve section 18 to be detected. In particular, the sleeve section 18 is configured such that it is rotationally decoupled from the cutting section 4 in a first axial position and rotationally coupled to the cutting section 4 in a second axial position.

[0051] Figure 14 Figure 16 illustrates the construction of a cutting section 4 according to another aspect of the invention. As described above, the cutting section 4 has a base section 24, which is connected to a first engaging section 27 via a first interface 26 and to a second engaging section 29 via a second interface 28. Preferably, the base section 24, the first engaging section 27, and the second engaging section 29 are constructed as metal components. The base section 24 serves as a single force transmission component and is constructed identically for cutting sections 4 of different sizes. The first engaging section 27 of different sizes, i.e., an internal milling cutter, can be screwed onto the thread via the first interface 26. The second engaging section 29 of different sizes, i.e., an external milling cutter (see [reference]), can be pushed onto the thread via the second interface 28. Figures 15a to 15c The outer diameter of the flange 31 of the second joining section 29 is constructed to be the same even when the dimensions of the second joining section 29 are different. Thus, the same sleeve section 18 can be used for cutting sections 4 of different sizes (see...). Figures 16a to 16c ).

[0052] Figure 17 and Figure 18Another embodiment according to another aspect of the invention is shown. Except for the blade of tool 1, the tool is constructed entirely of plastic component tool 43. The first engagement section 27 is constructed of plastic component 44, such as a plastic dome. The second engagement section 29 is constructed of plastic component 49, such as a plastic dome. An insert member 46 made of metal is connected to the first engagement section 27 and / or the second engagement section 29 by hot stamping.

Claims

1. A medical tool (1) configured as a rotatably driven tool, and the medical tool having a drive section (3) connectable to a medical device (2) for transmitting torque and a cutting section (4) torque-transmittably coupled to the drive section (3). Its features are, The medical tool (1) includes a sleeve (18) having a manipulation section (32). The medical tool (1) has an electronic structure group (41). The cutting section (4) is displaceable relative to the driving section (3) between a first axial position and a second axial position. In the first axial position, the cutting section (4) and the driving section (3) are rotationally coupled and the cutting section (4) and the sleeve (18) are rotationally decoupled. In the second axial position, the cutting section (4) and the driving section (3) are rotationally decoupled and the cutting section (4) and the sleeve (18) are rotationally coupled. The electronic structure assembly (41) has a switch (42) configured to be mechanically operated by rotation of the actuation section (32), such that the electronic structure assembly (41) is configured to detect the number of rotations of the cutting section (4) in a second axial position.

2. The medical tool (1) according to claim 1, characterized in that, The electronic structure assembly (41) is arranged in the fixed component of the medical tool (1).

3. The medical tool (1) according to claim 1, characterized in that, The medical tool (1) has an additional electronic structure group (7) configured to be activated by connecting the medical tool (1) to the medical device (2).

4. The medical tool (1) according to claim 3, characterized in that, The additional electronic structure group (7) has a storage device in which tool-specific data is stored, which is transmitted to an external processing unit when the additional electronic structure group (7) is activated.

5. The medical tool (1) according to claim 3 or 4, characterized in that, The additional electronic structure group (7) has additional switches (8, 9, 10) which are mechanically operable via the connection of the medical tool (1) such that the additional switches (8, 9, 10) close the circuit of the additional electronic structure group (7) in an operated switch position and open the circuit in an unoperated switch position.

6. The medical tool (1) according to claim 4, characterized in that, The additional electronic structure group (7) has communication devices (11, 12, 15) for generating radio connections, which transmit radio signals with tool-specific data in the case of a closed circuit and are arranged in the plastic housing (19) of the medical tool (1).

7. The medical tool (1) according to claim 5, characterized in that, The other switches (8, 9, 10) can be shifted between the operated switch position and the unoperated switch position in the axial or radial direction via the connection of the tool (1).

8. The medical tool (1) according to claim 3, characterized in that, The additional electronic structure group (7) has feedback devices (34, 35) and / or is connectable to external feedback devices, and the feedback devices (34, 35) and / or the feedback devices are configured such that when the additional electronic structure group (7) is to be activated or has been activated, it outputs auditory and / or visual feedback.

Images