Surgical device with RFID chip and RFID antenna

Abstract

A surgical device (1) as disclosed comprises an application part (2) in which an RFID chip is arranged, and a supply cable (4) in which an RFID antenna is arranged, which can be coupled to the application part. The application part and the supply cable can be coupled to each other in an OFF state, in which first coupling contacts (18, 52) of a first and a second coupling device (12, 42) are electrically engaged and second coupling contacts (20, 54) are electrically disengaged, or in an ON state, in which the first coupling contacts (18, 52) and the second coupling contacts (20, 54) are electrically engaged. The first and second coupling devices (12, 42) each have a further coupling contact (24, 58) which is connected in parallel to the first coupling contact (18) in the first coupling device (12) and to the second coupling contact (54) via the RFID antenna (60) in the second coupling device (42).The other coupling contacts (24, 58) are arranged so that they are electrically engaged in the OFF state and electrically disengaged in the ON state.

Description

Technical area

[0001] The present disclosure relates to a surgical device comprising a surgical application part having an electric motor with motor windings, and an electrical supply cable having a number of leads corresponding to a number of the motor windings and being coupleable to the application part in order to supply energy to the electric motor. State of the art

[0002] Such a surgical device is known from DE 10 2011 050 192 A1. This describes a surgical coupling system with two coupling devices, each having coupling contacts that can be mechanically and electrically engaged with one another. A first coupling device is assigned to a surgical application part, and a second coupling device is assigned to an electrical supply cable. The first and second coupling devices are designed such that they can assume two switching states, namely an OFF state and an ON state. In the OFF position, a coding / detection resistor can be used to determine which application part type is coupled to the electrical supply cable. In the ON state, the electric motor in the application part can then be operated or controlled accordingly based on this information by a control unit connected to another end of the supply cable.The disadvantage is that the number of usable resistors is limited, so only a general type of application part, e.g., milling cutter, saw, etc., can be determined. Consequently, no further data or information can be retrieved by the control unit.

[0003] For this reason, WO 2021 / 069 662 A1 discloses a surgical device with an integrated RFID readout antenna as a further development of the above-mentioned surgical device. An RFID chip and the readout antenna can be arranged together in the application part. However, this has the disadvantage that one electrical supply cable can be used for a large number of application parts, and consequently, an unnecessarily large number of readout antennas must be installed in the application parts. The cited document also describes a solution in which the readout antenna is provided in the electrical supply cable. In order to supply power to the readout antenna in the OFF state, a socket must have a contact bridge as a coupling contact, which can be reset by a resilient element in order to close an electrical circuit for supplying the readout antenna with power when a plug contact is removed from the socket.However, with frequent use, the spring element can lose its elasticity, so that the circuit for supplying the readout antenna with energy can no longer be reliably closed in the OFF state.

[0004] It is therefore the object of the present disclosure to eliminate or at least mitigate the disadvantages of the prior art. In particular, the above-mentioned surgical devices are to be further developed.

[0005] This object is achieved by the surgical device having the feature according to claim 1. Advantageous embodiments are the subject of the dependent claims.

[0006] A surgical device according to the disclosure comprises a surgical application part having an electric motor with motor windings and a first coupling device at one end. The electric motor can be designed as an AC motor or, more preferably, as a three-phase motor with three or a multiple of three motor windings.

[0007] In order to supply power to the application part, i.e. the electric motor, the surgical device has an electrical supply cable with a number of wires corresponding to the number of motor windings. Consequently, when using an AC motor, the electrical supply cable can have two wires. When using a three-phase motor, the electrical supply cable can have three wires to supply power to three or a multiple of three, e.g., six, motor windings. The electrical supply cable has a second coupling device at one end that is designed to be coupled to the first coupling device. At its second end, the electrical supply cable is connected to a control unit for controlling the electric motor or can be connected, e.g., by means of a control unit coupling device provided for this purpose.

[0008] The first and second clutch devices are configured to be brought into a disconnected state, an OFF state, or an ON state. In the disconnected state, the first and second clutch devices are completely disengaged both mechanically and electrically. In the OFF state, the first and second clutch devices are at least partially mechanically engaged, and at least some of the clutch contacts are electrically and mechanically engaged. In the ON state, the first and second clutch devices are completely mechanically engaged, and clutch contacts used to supply the electric motor with energy are both electrically and mechanically engaged. This type of first and second clutch device is already known from DE 10 2011 050 192 A1, the disclosure of which is incorporated herein by reference.

[0009] According to the present disclosure, in the OFF state, first clutch contacts of the first and second clutch devices are electrically engaged. The first clutch contact in the first clutch device is connected to a first motor winding, and the first clutch contact in the second clutch device is connected to a first line in the electrical supply cable. Furthermore, second clutch contacts of the first and second clutch devices are electrically disengaged. The second clutch contact in the first clutch device is connected to a second motor winding, and the second clutch contact of the second clutch device is connected to a second line in the electrical supply cable. Accordingly, in the OFF state, power supply between the second line and the second motor winding is interrupted, so that the electric motor is not operating.

[0010] According to the present disclosure, in the ON state, the first clutch contacts of the first and second clutch devices and the second clutch contacts of the first and second clutch devices are electrically and mechanically engaged. Accordingly, in the ON state, the second motor winding is supplied with power via the second line to drive the electric motor.

[0011] The surgical device has an RFID chip arranged in the first coupling device. The RFID chip can preferably be embodied as a passive glass tag. A variety of data or information can be stored in the RFID chip. The data can include, for example, a serial number, a maintenance interval, a type of maintenance performed, a manufacturing date, a performance, an application counter, and / or a duration of use. This enables a high level of transparency in the event of service or a fault.

[0012] In order to read the data stored in the RFID chip, the surgical device has an RFID antenna arranged in the second coupling device and which can be supplied with energy. The RFID antenna is arranged adjacent to, i.e. in the immediate vicinity of, the RFID chip, at least in the OFF state, and is designed to excite the RFID chip in order to transmit data between the RFID chip and the control unit, preferably bidirectionally. Consequently, the data stored in the RFID chip can be read by the control unit, and use of the application part can be authorized by the control unit, for example, only if the stored data satisfy predetermined conditions. This can reliably prevent, for example, the use of an unmaintained application part. Preferably, the control unit can also write data to the RFID chip so that the data is updated after use of the application part.The RFID antenna can be designed, for example, as a wire, in particular copper wire, a printed circuit board with conductor tracks, a flexible printed circuit board with conductor tracks, a plastic with activated conductor tracks or as a two-component injection molding with conductor tracks.

[0013] According to the disclosure, the first and second coupling devices each have a further electrical coupling contact, which is connected in parallel with the first coupling contact in the first coupling device and is connected in parallel with the second coupling contact in the second coupling device via the RFID antenna. The further coupling contacts of the first and second coupling devices are configured to be electrically engaged in the OFF state and electrically disengaged in the ON state. Accordingly, the RFID antenna is supplied with energy in the OFF state.The energy for operating the RFID antenna is provided via the first line, the first coupling contact in the second coupling device, the first coupling contact in the first coupling device, the further coupling contact in the first coupling device, the further coupling contact in the second coupling device, the RFID antenna, and the second line. Since the second coupling contacts in the first coupling device and the second coupling device are electrically disengaged in the OFF state, operation of the electric motor is prevented. Furthermore, no socket with a contact bridge and spring element for resetting the contact bridge is required. Furthermore, it is also not necessary for the electrical supply cable to have more lines than the number of motor windings.

[0014] Preferably, the first and second coupling devices can each have third coupling contacts that are electrically engaged in the OFF state and in the ON state. Consequently, in the OFF state, a conductive connection can be achieved via the first line, the first coupling contact in the second coupling device, the first coupling contact in the first coupling device, the first motor winding, the third motor winding, the third coupling contact in the first coupling device, the third coupling contact in the second coupling device, and the third line. Consequently, the first and third motor windings of the electric motor, in particular their series resistance, can be measured by the control unit to determine a type of electric motor in the application part. This can occur simultaneously with receiving / writing data from / to the RFID chip.

[0015] Furthermore, the coupling contacts in the first coupling device can be designed as pins and in the second coupling device as sockets. The pin of the further coupling contact can be designed to be longer than the pin of the second coupling contact. Consequently, an electrically conductive contact of the further coupling contacts is achieved in the OFF state, while the second coupling contacts are electrically and mechanically disengaged. The pin of the further coupling contact can have an insulating portion designed such that the further coupling contacts are electrically disengaged in the ON state. In particular, a shaft portion of the coupling contact designed as a pin can be covered or coated with an insulating layer to form the insulating portion. The insulating layer is preferably formed such that it is substantially planar to a conductive portion at the tip of the pin.Alternatively or additionally, the socket of the further coupling contact can have an insulating portion configured such that the third coupling contacts are electrically disengaged in the ON state. In particular, a bottom portion of the socket can be covered with an insulating layer to form the insulating portion. The insulating layer is preferably formed substantially flush with a conductive portion at an input portion of the socket. In this way, an electrically conductive connection of the further coupling contacts in the OFF state and an electrically non-conductive connection in the ON state is achieved.

[0016] Advantageously, the additional coupling contact and the first coupling contact in the first coupling device can be connected in parallel via a wire bridge. This allows for a simple connection between the two coupling contacts. The wire bridge can also be retrofitted to existing four-pole first coupling devices if necessary.

[0017] It has proven advantageous if the first coupling device has a coupling sleeve on which the RFID chip is arranged radially inward. The RFID chip or a cast material surrounding the RFID chip can preferably be designed to be substantially flat relative to an inner surface of the coupling sleeve. The first coupling device can be designed as a coupling pin, in which a blind hole is formed to form the coupling sleeve. By arranging the RFID chip, in particular the glass tag, inside the coupling sleeve, it is reliably protected from mechanical damage. The procedure known from DE 10 2019 122 349 A1 can be used to arrange the RFID chip, the disclosure of which is incorporated herein by reference.

[0018] Advantageously, the second coupling device can have a coupling pin on which the RFID antenna is arranged radially outward. The RFID antenna or a cast material surrounding the RFID antenna can preferably be designed to be substantially flat relative to an outer surface of the coupling pin. The second coupling device can be designed as a coupling sleeve into which a coupling pin protrudes.

[0019] The RFID antenna can advantageously be embedded, in particular cast, in a groove formed on the outer surface of the coupling pin. The RFID antenna can preferably be a copper wire. By guiding the groove on the outer surface of the coupling pin, the shape of the RFID antenna can thus be determined. The RFID antenna can, in particular, be loop-shaped, meander-shaped, spiral-shaped, coil-shaped, or helical. Accordingly, the directivity and range of the RFID antenna can be easily determined.

[0020] The RFID antenna can preferably be arranged as a loop at a distal end of the coupling pin. A portion of the loop can run in the circumferential direction of the coupling pin, i.e., parallel to a front end of the coupling pin. Accordingly, the RFID antenna can be formed in a simple manner, ensuring that only one RFID chip in the immediate vicinity of the RFID antenna is read / written.

[0021] The RFID antenna can also be arranged as a metallic coating on a distal end of the coupling pin. The RFID antenna can thus be formed in a simple manner. The antenna formed by the metallic coating can also be embedded, in particular cast, in the groove formed on the outer surface of the coupling pin.

[0022] Advantageously, an electrical circuit can be provided that is configured to tune the RFID antenna. The electrical circuit can be arranged in the second coupling device. Accordingly, only the RFID antenna in the area of ​​the second coupling device needs to be tuned. Alternatively, the electrical circuit can be arranged in the control unit. Consequently, the lines for supplying the RFID antenna with power also need to be tuned. By tuning the RFID antenna using the electrical circuit, reliable data transmission between the RFID chip and the control unit via the RFID antenna is achieved.

[0023] Advantageously, the electrical supply cable can have a cable shield that can be used as a return line for the RFID antenna. The cable therefore has a coaxial structure, ensuring interference-free data transmission via the electrical supply cable.

[0024] An electrical circuit can be arranged in the second coupling device, which is configured to process the data received from the RFID antenna and transmit it to the control unit and / or to process the data received from the control unit and write it to the RFID chip. The electrical circuit can have a microcomputer or microcontroller for this purpose. The electrical circuit can convert the data received from the RFID antenna or the control unit, in particular from one form to another and / or back again. Preferably, the electrical circuit can transmit the data received from the RFID antenna to the control unit and / or receive it from the control unit using one-wire technology. Consequently, reliable bidirectional data transmission between the electrical circuit and the control unit is achieved, even with long cable lengths.It should be noted that the two electrical circuits described can be integrated into one electrical circuit. Short description of the characters

[0025] The present disclosure is described below with reference to the figures. They show: Fig. 1 a surgical device with a surgical application part and an electrical supply cable coupled together in an OFF state, Fig. 2 the surgical device with the surgical application part and the electrical supply cable coupled together in an ON state, Fig. 3 the surgical application part, Fig. 4 a first coupling device of the surgical application part, Fig. 5 a sectional view of the surgical application part, Fig. 6 the electrical supply cable, Fig. 7 a coupling pin of a second coupling device of the electrical supply cable, Fig. 8 a rotated view of the coupling pin of the second coupling device, Fig. 9 is a sectional view of the first and second clutch devices coupled together in the OFF state, Fig. 10 is a detailed sectional view of the first and second clutch devices coupled together in the OFF state, Fig. 11 is a further detailed sectional view of the first and second clutch devices coupled together in the OFF state, Fig. 12 is another detailed sectional view of the first and second clutch devices coupled together in the OFF state, Fig. 13 is a detailed sectional view of the first and second coupling devices coupled together in the ON state, Fig. 14 is a further detailed sectional view of the first and second coupling devices coupled together in the ON state, Fig. 15 is a schematic circuit diagram in the OFF state, Fig. 16 is a schematic circuit diagram in the OFF state showing a conductive path for measuring a series resistance of two motor windings, Fig. 17 is a schematic circuit diagram in the OFF state showing a conductive path for supplying energy to an RFID antenna, and Fig. 18 is a schematic circuit diagram in the ON state. Description of an embodiment

[0026] An embodiment of the present disclosure will be described below with reference to the figures. It should be noted that the same or functionally corresponding parts or sections are assigned the same reference numerals.

[0027] The Fig. 1 and Fig. 2 show a surgical device 1, which has a surgical application part 2, which can be, for example, a milling machine, a saw, etc., and an electrical supply cable 4. At a distal end of the application part 2, an electric motor 34 arranged in the application part 2 is arranged (see Fig. 15) is attached. At a proximal end, the application part 2 is connected to the electrical supply cable 4 by a coupling system 8 (known from DE 10 2011 050 192 A1). The coupling system 8 is designed such that it has two switching states or coupling states, namely an OFF state ( Fig. 1) and an ON state ( Fig. 2) is possible.

[0028] Fig. 3 shows the surgical application part 2 in a separated state, i.e., in a state in which the coupling system 8 is disengaged. In the present case, the application part 2 is designed as a manually held or operable tool and therefore has a handle 10. A first coupling device 12 of the coupling system 8 is arranged at a proximal end of the application part 2. The coupling device 12 is designed in the present case as a coupling pin 14 with a coupling sleeve 16 formed therein.

[0029] Fig. Figure 4 shows a detailed view of the coupling device 12. Four coupling contacts, namely a first coupling contact 18, a second coupling contact 20, a third coupling contact 22, and a fourth or further coupling contact 24, are arranged in the coupling sleeve 16. These contacts are embodied as pins in this case. An RFID chip 26, embodied as a passive glass tag in this case, is arranged on an inner surface of the coupling sleeve 16 of the first coupling device 12, substantially flush with the inner surface of the coupling sleeve 16.

[0030] In Fig. Figure 5 shows a sectional view of the first coupling device 12 in a plane of the second coupling contact 20 and the fourth coupling contact 24. It can be seen that the second coupling contact 20 is shorter than the fourth coupling contact 24. Furthermore, the fourth coupling contact 24 has two sections, namely a conductive section 28 at its tip and an insulating section 30 at its shaft. Furthermore, a wire bridge 32 can be seen.

[0031] The connection of the coupling contacts 18, 20, 22, 24 should be made using Fig. 15. The first coupling contact 18 is connected to a first motor winding 36. The second coupling contact 20 is connected to the second motor winding 38. The third coupling contact 22 is connected to the third motor winding 40. The fourth coupling contact 24 is connected in parallel with the first coupling contact 18 in the application part 2 via the wire bridge 32.

[0032] Fig. 6 shows the electrical supply cable 4, which has a second coupling device 42 at its distal end, provided as a coupling sleeve 44 with a coupling pin 46 formed therein. The second coupling device 42 is thus configured to be mechanically engaged with the first coupling device 12. The second coupling device 34 is connected via a cable section 48, in which a number of lines corresponding to the number of motor windings runs, to a control unit coupling device 50, which is configured to be connectable to a control unit for operating the electric motor 34.

[0033] The Fig. 7 and Fig. 8 shows a detailed view of the coupling pin 46 without the coupling sleeve 44. Four coupling contacts, namely a first coupling contact 52, a second coupling contact 54, a third coupling contact 56, and a fourth or further coupling contact 58, are embedded or incorporated in the coupling pin 46. In the present case, the coupling contacts 52, 54, 56, 58 are designed as sockets that can be mechanically engaged with the coupling contacts 18, 20, 22, 24 designed as pins. On an outer surface of the coupling pin 46, an RFID antenna 60 is embedded in a groove provided for this purpose. In the present case, the RFID antenna 60 is designed as a copper wire loop. The copper wire loop extends on the outside of the coupling pin initially in the axial direction to an end face of the coupling pin 46. From there the loop then runs at a predetermined angle, e.g. 180°, along the circumferential direction of the coupling pin 46, i.e.i.e., parallel to an end face of the coupling pin 46. The loop then returns to the vicinity of its starting point via a section in the axial direction and a section along the circumferential direction. Accordingly, the RFID antenna 60 can be easily arranged on the outer surface of the coupling pin 46. It should be noted that this type of RFID antenna 60 is exemplary, and other antenna shapes, e.g., meandering, spiral, coil, or helical, are possible. Alternatively, a different type of antenna, e.g., a printed circuit board with conductive tracks, a flexible printed circuit board with conductive tracks, a plastic with activated conductive tracks, or a two-component injection molding with conductive tracks, can be used.

[0034] The second coupling device 42 has an electrical circuit 62 connected to the RFID antenna 60. The electrical circuit 62 can be configured to tune the RFID antenna 60 to enable reliable data transmission between the RFID chip 26 and the control unit via the RFID antenna 60. Alternatively or additionally, the electrical circuit 62 can be configured to process data received from the RFID antenna 60 and transmit it to the control unit via lines 64, 66 (see Fig. 15) of the electrical supply cable 4, e.g., using one-wire technology, and / or processes the data received from the control unit, e.g., using one-wire technology, and writes it into the RFID chip 26. Consequently, the electrical supply cable 4 can be longer without disrupting data transmission.

[0035] The connection of the coupling contacts 52, 54, 56, 58 is made using Fig. 15. The first coupling contact 52 is connected to a first line 64. The second coupling contact 54 is connected to a second line 66. The third coupling contact 56 is connected to a third line 68. As already described, the lines 64, 66, 68 run in the cable section 48 of the electrical supply cable 4. The fourth coupling contact 58 is connected to the second line 66 in the second coupling device via the RFID antenna 60.

[0036] The switching states of the clutch system 8 are described below. Fig. 9, the first coupling device 12 and the second coupling device 42 are partially engaged to achieve the OFF state. It can be seen that the third coupling contact 22 and the fourth coupling contact 24, i.e., the conductive portion 28, partially protrude into the designated coupling contacts 56 and 58, respectively, in the coupling pin 46. Consequently, the insulating portion 30 is arranged outside the fourth coupling contact 58. Furthermore, the wire bridge 32, which connects the first coupling contact 18 to the fourth coupling contact 24, can be seen. The antenna 60 is shown in Fig. 9 so that the loop portion is arranged along the circumferential direction behind the image plane to be arranged adjacent to the RFID chip 26.

[0037] Fig. Figure 10 also shows a case in which the clutch system 8 is in the OFF state. It can be seen that the second clutch contact 20 is shorter than the other clutch contacts 18, 22, 24, so that in the OFF state, it does not protrude into the second clutch contact 54 provided for this purpose in the clutch pin 46. Consequently, a connection between the second line 66 and the second motor winding 38 is interrupted to prevent operation of the electric motor 34. Fig. 10 also shows the adjacent arrangement of the RFID antenna 60, in particular the section running along the circumferential direction of the coupling pin 46, to the RFID chip 26 in the OFF state.

[0038] Fig. 11 shows a sectional view along a plane of the third and fourth coupling contacts 22, 24, 56, 58. It can be seen that only the conductive portion 28 of the fourth coupling contact 24 protrudes into the designated fourth coupling contact 58 in the coupling pin 46. The fourth coupling contact 58 in the coupling pin 46 has a conductive portion 70 at its input portion and an insulating portion 72 at its base portion. In the OFF state, the conductive portion 28 of the fourth coupling contact 24 and the conductive portion 70 of the fourth coupling contact 58 are engaged both mechanically and electrically.

[0039] Fig. 12 shows a sectional view along a plane of the first and second coupling contacts 18, 20, 52, 54. It can be seen that the second coupling contact 20 and the second coupling contact 54 provided therefor are disengaged in the OFF state.

[0040] In the Fig. 11 and Fig. Figure 12 also shows the path of the wire bridge 32 from the first coupling contact 18 to the fourth coupling contact 24, connecting them in parallel. In this case, the first coupling contact 18 and the fourth coupling contact 24 are arranged diagonally. However, the two coupling contacts 18, 24 can also be arranged side by side.

[0041] Fig. 13 shows a sectional view of the coupling system 8 in the ON state in the plane of the third and fourth coupling contacts 22, 24, 56, 58. It can be seen that the first coupling device 12 fully engages the second coupling device 42, so that the coupling pin 46 is fully inserted into the coupling sleeve 16. In this configuration, the insulating portion 30 of the fourth coupling contact 24 lies opposite the conductive portion 70 of the fourth coupling contact 58, and the conductive portion 28 of the fourth coupling contact 24 lies opposite the insulating portion 72 of the fourth coupling contact 58. The fourth coupling contacts 24, 58 are therefore mechanically engaged, but are electrically disengaged, i.e., brought into a non-conductive state, by the above-described arrangement of the insulating portions 30, 72 and the conductive portions 28, 70.Accordingly, an electrically conductive connection is established between the fourth coupling contacts 24, 58 to avoid a short circuit of the motor windings 36, 38 of the electric motor 34 (see . Fig. 15) interrupted.

[0042] Fig. 14 shows a sectional view of the clutch system 8 in the ON state in the plane of the first and second clutch contacts 18, 20, 52, 54. It can be seen that the second clutch contact 20 and the second clutch contact 54 provided for it are now also engaged both electrically and mechanically. Consequently, a conductive connection is achieved between the second line 66 and the second motor winding 38. Consequently, in the ON state, all three motor windings 36, 38, 40 are electrically connected to the designated lines 64, 66, 68 of the electrical supply cable 4 to enable operation of the electric motor 34 in accordance with the control by the control unit.

[0043] By the above-described configuration of the coupling contacts 18, 20, 22, 24 in the first coupling device 12 and the coupling contacts 52, 54, 56, 58 in the second coupling device 42, the following electrical connections can now be achieved in the OFF state and in the ON state.

[0044] As in Fig. 16, indicated by an arrow, in the OFF state, a conductive connection is achieved via the first line 64, the first coupling contact 52, the first coupling contact 18, the first motor winding 36, the third motor winding 40, the third coupling contact 22, the third coupling contact 56, and the third line 68. Accordingly, the control unit can be configured to apply a measurement signal, in particular a predetermined current or a predetermined voltage, to the first line 64 and the third line 68 in order to determine a series resistance of the first motor winding 36 and the third motor winding 40. Accordingly, the control unit is capable of determining a type of electric motor 34 installed in the application part 2 based on the measured series resistance.

[0045] In addition, as indicated by the arrow in Fig. 17, in the OFF state, a conductive connection is maintained via the first line 64, the first coupling contact 52, the first coupling contact 18, the wire bridge 32, the third coupling contact 24, the third coupling contact 58, the RFID antenna 60, and the second line 66. Accordingly, the RFID antenna 60 is supplied with energy to excite and read the adjacent RFID chip 26 or to write data to the RFID chip 26. Consequently, data transmission between the RFID chip 26 and the control unit can be achieved. For example, before using the application part 2, data can be read from the RFID chip 26 so that the control unit can determine whether the application part 2 is suitable for the intended use. After use, the data in the RFID chip 26 can be updated. This procedure can also be carried out, for example, before and after maintenance.

[0046] Fig.Figure 18 now shows a case in which the clutch system 8 is in the ON state. Consequently, the fourth clutch contact 24 and the fourth clutch contact 58 are electrically disengaged, and the clutch contacts 18, 20, 22 of the first clutch device 12 are electrically engaged with the designated clutch contacts 52, 54, 56 of the second clutch device 42 to enable operation of the electric motor 34 according to the control by the control unit.

[0047] An embodiment of the present disclosure has been described above. However, the present disclosure is not limited to the above-described embodiment, and the following modification may be applied.

[0048] The tool 6 can have an additional RFID chip. In this case, an additional RFID antenna can be arranged in the application part 2 adjacent to the additional RFID chip in order to read the additional RFID chip and / or to write data to the additional RFID chip. The RFID antenna 60 and the additional RFID antenna can be connected in series to the control unit or the electrical circuit 62. Alternatively, the RFID antenna 60 and the additional RFID antenna can be connected in parallel in separate circuits to the control unit or to respective electrical circuits 62 for tuning the RFID antennas. By providing the additional RFID chip in the tool 6 and the RFID antenna in the application part 2, data can additionally be read / written via the tool 6 by the control unit. Consequently, transparency in the event of a service or error is further increased. List of reference symbols 1 surgical device 2 surgical application part 4 electrical supply cable 6 Tools 8 Coupling system 10 Handle 12 first coupling device 14 coupling pins 16 Coupling sleeve 18 first clutch contact 20 second coupling contact 22 third clutch contact 24 fourth coupling contact 26 RFID chips 28 leading section 30 Insulation section 32 wire bridge 34 electric motor 36 first motor winding 38 second motor winding 40 third motor winding 42 second coupling device 44 Coupling sleeve 46 coupling pins 48 cable sections 50 Control unit coupling device 52 first clutch contact 54 second clutch contact 56 third clutch contact 58 fourth clutch contact 60 RFID antenna 62 electrical circuit 64 first line 66 second line 68 third line 70 leading section 72 Insulation section QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This 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

[0000] DE 10 2011 050 192 A1 [0002, 0008, 0027] DE 10 2019 122 349 A1

[0017]

Claims

[1] Surgical device (1) comprising: a surgical application part (2) having an electric motor (34) with motor windings (36, 38, 40) and a first coupling device (12) at one end thereof, an electrical supply cable (4) with a number of lines corresponding to a number of motor windings (36, 38, 40), wherein the electrical supply cable (4) has at one end a second coupling device (42) which is designed to be coupled to the first coupling device (12) and is connected or connectable at its second end to a control unit for controlling the electric motor (34), wherein the first and second coupling devices (12, 42) are configured to be brought into a disconnected state or an OFF state in which first coupling contacts (18, 52) of the first and second coupling devices (12, 42) are electrically engaged and second coupling contacts (20, 54) of the first and second coupling devices (12, 42) are electrically disengaged, or into an ON state in which the first coupling contacts (18, 52) of the first and second coupling devices (12, 42) and the second coupling contacts (20, 54) of the first and second coupling devices (12, 42) are electrically engaged, an RFID chip (26) arranged in the first coupling device (12), and an RFID antenna (60) arranged in the second coupling device (42) and capable of being supplied with energy, which is arranged adjacent to the RFID chip (26) at least in the OFF state and is designed to excite the RFID chip (26) in order to transmit data between the RFID chip (26) and the control unit, in particular bidirectionally, characterized by , that the first and second coupling devices (12, 42) each have a further coupling contact (24, 58) which is connected in parallel to the first coupling contact (18) in the first coupling device (12) and is connected in parallel to the second coupling contact (54) in the second coupling device (42) via the RFID antenna (60), and the further coupling contacts (24, 58) of the first and second coupling devices (12, 42) are arranged to be electrically engaged in the OFF state and electrically disengaged in the ON state. [2] Surgical device (1) according to claim 1, characterized by that the first and second clutch devices (12, 42) have third clutch contacts (22, 56) that are electrically engaged in the OFF state and in the ON state. [3] Surgical device (1) according to claim 1 or 2, characterized by , that the coupling contacts (18, 20, 22, 24) in the first coupling device (12) are designed as pins and the coupling contacts (52, 54, 56, 58) in the second coupling device (42) are designed as sockets, in the first coupling device (12) the further coupling contact (24) is longer than the second coupling contact (20), and the further coupling contacts (24, 58) have insulating sections (30, 72) which are designed such that the further coupling contacts (24, 58) are electrically disengaged in the ON state. [4] Surgical device (1) according to one of claims 1 to 3, characterized by that the further coupling contact (24) and the first coupling contact (18) in the first coupling device (12) are connected to one another in parallel via a wire bridge (32). [5] Surgical device (1) according to one of claims 1 to 4, characterized by that the first coupling device (12) has a coupling sleeve (16) on which the RFID chip (26) is arranged radially inward, in particular flat to an inner surface of the coupling sleeve (16). [6] Surgical device (1) according to one of claims 1 to 5, characterized by that the second coupling device (42) has a coupling pin (46) on which the RFID antenna (60) is arranged radially outwardly, in particular flat to an outer surface of the coupling pin (46). [7] Surgical device (1) according to claim 6, characterized bythat the RFID antenna (60) is embedded, in particular cast, in a groove formed on the outer surface of the coupling pin (46). [8] Surgical device (1) according to claim 6 or 7, characterized by that the RFID antenna (60) is arranged as a loop at a distal end of the coupling pin (46). [9] Surgical device (1) according to claim 6 or 7, characterized by that the RFID antenna (60) is arranged as a metallic coating at a distal end of the coupling pin (46). [10] Surgical device (1) according to one of claims 1 to 9, characterized by an electrical circuit (62) arranged in the control unit or in the second coupling device (42) and configured to tune the RFID antenna (60). [11] Surgical device (1) according to one of claims 1 to 10, characterized byan electrical circuit (62) arranged in the second coupling device (42) and configured to process the data received from the RFID antenna (60) and transmit it to the control unit, in particular using the one-wire technology, and / or to process the data received from the control unit, in particular using the one-wire technology, and write it into the RFID chip (26).

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