Surgical device with RFID chip and RFID antenna

Abstract

A surgical device according to the invention has an application part in which an RFID chip and an RFID antenna, adjacent to the RFID chip, are arranged, and has a supply cable which can be coupled to said application part. The application part and the supply cable can be coupled to one another in an OFF state, in which first coupling contacts of a first and a second coupling device are electrically in engagement and second coupling contacts are electrically out of engagement, or in an ON state, in which the first coupling contacts and the second coupling contacts are electrically in engagement. The first and the second coupling device each comprise an additional coupling contact which are designed such that they are electrically in engagement at least in the OFF state in order to supply the RFID antenna with energy.

Description

[0001] Surgical device with RFID chip and RFID antenna

[0002] Description

[0003] Technical area

[0004] 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.

[0005] State of the art

[0006] 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 state, 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 here is that the number of usable resistors is limited, so that 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. 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 surgical device.

[0007] It is an object of the present disclosure to provide an advanced surgical device.

[0008] This object is achieved by the surgical devices having the features according to the independent claims. Advantageous embodiments are the subject of the dependent claims and / or are disclosed in the description and / or the figures.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] In order to read the data stored in the RFID chip, the surgical device has an RFID antenna which is arranged in the first coupling device and can be supplied with energy. The RFID antenna is adjacent, i.e. in the immediate vicinity, to the RFID chip 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 application part that has not been maintained. 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, a two-component injection molding with conductor tracks or as a slot antenna.

[0016] According to the disclosure, the first and second coupling devices each have a further electrical coupling contact. The further coupling contacts of the first and second coupling devices are configured to be electrically engaged at least in the OFF state to supply the RFID antenna with energy. Consequently, the RFID chip can be read / written in the OFF state. This eliminates the need for a socket with a contact bridge and a resilient element for resetting the contact bridge, as used in WO 2021 / 069662 A1.

[0017] Preferably, the first and second coupling devices can each have third coupling contacts that are electrically engaged in the OFF state and the ON state. Accordingly, the first and third motor windings of the electric motor, in particular their series resistance, can be measured by the control unit to determine the type of electric motor in the application part. This can occur simultaneously with receiving / writing data from / to the RFID chip.

[0018] Alternatively, the first and second clutch devices may include third clutch contacts that are electrically disengaged in the OFF state and electrically engaged in the ON state. That is, the third clutch contacts are electrically engaged at least in the ON state to enable power to be supplied to the electric motor.

[0019] In particular, the further coupling contact in the first coupling device can be connected in parallel to the second coupling contact via the RFID antenna.

[0020] Alternatively, the further coupling contact in the first coupling device can be connected in parallel to the first coupling contact via the RFID antenna.

[0021] Advantageously, the additional coupling contact and the second coupling contact or 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 respective coupling contacts. The wire bridge can also be retrofitted to existing four-pole first coupling devices if necessary.

[0022] In addition, the additional coupling contact in the second coupling device can be connected in parallel with the second coupling contact. Consequently, in the OFF state, in which the additional coupling contacts are electrically engaged, the RFID antennas can be supplied with power via a second line in the electrical supply cable connected to the second coupling contact.

[0023] Alternatively, the additional coupling contact in the second coupling device can be connected to a shield of the electrical supply cable. Consequently, the RFID antenna can be supplied with electrical power via the shield. The shield should preferably not touch the housing of the application part. Furthermore, a creepage distance of at least 4 mm and a clearance with a height factor of 3.7 mm should be maintained. This prevents the spread of external voltages.

[0024] According to one aspect, the additional coupling contacts can be configured such that they are electrically engaged even in the ON state. In this way, the additional coupling contacts can be formed in a simple manner. One of the additional coupling contacts, preferably the additional coupling contact in the first coupling device, can be connected in series to a detection resistor. This configuration is advantageous if the additional coupling contacts are each connected in parallel to the second coupling contacts and the second coupling contacts are bridged by the additional coupling contacts in the OFF state. The detection resistor can preferably be arranged in the application part and coded according to the application part. Consequently, the application part can be identified by measuring the detection resistor.In addition, in the ON state, a current is not conducted via the other coupling contacts, but via the second coupling contacts.

[0025] Alternatively, the additional coupling contacts can be designed such that they are electrically disengaged in the ON state. Consequently, current flow through the additional coupling contacts is reliably prevented in the ON state.

[0026] Even when using the further coupling contacts which are electrically disengaged in the ON state, one of the further coupling contacts, preferably the further coupling contact in the first coupling device, can be connected in series to a detection resistor.

[0027] The detection resistor can therefore be arranged in the first coupling device or in the second coupling device. The detection resistor can preferably be arranged in the first coupling device and have a resistance value corresponding to the application part or the electric motor. The detection resistor can, for example, have a resistance value of 10 ohms. Accordingly, a series resistance between the detection resistor and the resistance of the RFID antenna can be detected before and / or during excitation of the RFID antenna by the control unit in order to determine the correct presence of the OFF state. This procedure is particularly advantageous when the third coupling contacts of the first coupling device and the second coupling device are electrically disengaged in the OFF state and no measurement of the series resistance of motor windings is possible.Since the series resistance of the motor windings is in the range of a few ohms, the provision of the detection resistor is also advantageous if the series resistance of the motor windings can be measured via the third coupling contacts.

[0028] 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 planar to 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. 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 thereof.The electric motor can be designed as an alternating current motor or, more preferably, as a three-phase motor with three or a multiple of three motor windings.

[0029] 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.

[0030] 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.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.

[0031] 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.

[0032] 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.

[0033] 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, a two-component injection molding with conductor tracks or as a slot antenna.

[0034] According to the disclosure, the first and second coupling devices each have a further electrical coupling contact. The further coupling contacts of the first and second coupling devices are configured to be electrically engaged at least in the OFF state to supply the RFID antenna with energy. Consequently, the RFID chip can be read / written in the OFF state. This eliminates the need for a socket with a contact bridge and a resilient element for resetting the contact bridge, as used in WO 2021 / 069 662 A1.

[0035] Preferably, the first and second coupling devices can each have third coupling contacts that are electrically engaged in the OFF state and the ON state. Accordingly, the first and third motor windings of the electric motor, in particular their series resistance, can be measured by the control unit to determine the type of electric motor in the application part. This can occur simultaneously with receiving / writing data from / to the RFID chip.

[0036] Alternatively, the first and second clutch devices may include third clutch contacts that are electrically disengaged in the OFF state and electrically engaged in the ON state. That is, the third clutch contacts are electrically engaged at least in the ON state to enable power to be supplied to the electric motor.

[0037] In particular, the further coupling contact in the first coupling device can be connected in parallel with the second coupling contact.

[0038] Alternatively, the further coupling contact in the first coupling device can be connected in parallel with the first coupling contact.

[0039] Advantageously, the additional coupling contact and the second coupling contact or 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 respective coupling contacts. The wire bridge can also be retrofitted to existing four-pole first coupling devices if necessary.

[0040] Furthermore, the additional coupling contact in the second coupling device can be connected in parallel to the second coupling contact via the RFID antenna. Consequently, in the OFF state, in which the additional coupling contacts are electrically engaged, the RFID antennas can be supplied with power via a second line in the electrical supply cable connected to the second coupling contact.

[0041] Alternatively, the additional coupling contact in the second coupling device can be connected to a shield of the electrical supply cable via the RFID antenna. Consequently, the RFID antenna can be supplied with electrical energy via the shield. The shield should preferably not touch the housing of the application part. Furthermore, a creepage distance of at least 4 mm and an air gap with a height factor of 3.7 mm should be maintained. In this way, the spread of external voltages can be counteracted. According to one aspect, the additional coupling contacts can be designed such that they are electrically engaged even in the ON state. In this way, the additional coupling contacts can be formed in a simple manner. One of the additional coupling contacts, preferably the additional coupling contact in the first coupling device, can be connected in series with a detection resistor.This configuration is advantageous when the additional coupling contacts are each connected in parallel with the second coupling contacts, and the second coupling contacts are bridged in the OFF state. The detection resistor can preferably be arranged in the application part and coded according to the application part. Consequently, the application part can be identified by measuring the detection resistance. Furthermore, in the ON state, a current is conducted via the second coupling contacts rather than the additional coupling contacts.

[0042] Alternatively, the additional coupling contacts can be designed such that they are electrically disengaged in the ON state. Consequently, current flow through the additional coupling contacts is reliably prevented in the ON state.

[0043] Even when using the further coupling contacts which are electrically disengaged in the ON state, one of the further coupling contacts, preferably the further coupling contact in the first coupling device, can be connected in series to a detection resistor.

[0044] The detection resistor can therefore be arranged in the first coupling device or in the second coupling device. The detection resistor can preferably be arranged in the first coupling device and have a resistance value corresponding to the application part or the electric motor. The detection resistor can, for example, have a resistance value of 10 ohms. Accordingly, a series resistance between the detection resistor and the resistance of the RFID antenna can be detected before and / or during excitation of the RFID antenna by the control unit in order to determine the correct presence of the OFF state. This procedure is particularly advantageous when the third coupling contacts of the first coupling device and the second coupling device are electrically disengaged in the OFF state and no measurement of the series resistance of motor windings is possible.Since the series resistance of the motor windings is in the range of a few ohms, the provision of the detection resistor is also advantageous if the series resistance of the motor windings can be measured via the third coupling contacts.

[0045] 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.

[0046] A surgical device according to the disclosure comprises a surgical application part which has an electric motor with motor windings and a first coupling device at one end. The electric motor can be designed as an alternating current motor or, more preferably, as a three-phase motor with three or a multiple of three motor windings. In order to supply energy 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 the alternating current motor is used, the electrical supply cable can have two wires. When the three-phase motor is used, the electrical supply cable can have three wires in order to supply energy to the three or a multiple of three, e.g., six, motor windings.The electrical supply cable has a second coupling device at one end, which is configured to couple 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] In order to read the data stored in the RFID chip, the surgical device has an RFID antenna which is arranged in the second coupling device and can be supplied with energy. The RFID antenna is arranged adjacent to the RFID chip, i.e. in the immediate vicinity, 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. The RFID antenna is preferably also arranged adjacent to the RFID chip in the ON state. Consequently, the data stored in the RFID chip can be read by the control unit, and use of the application part can be enabled 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 a copper wire, a printed circuit board with conductor tracks, a flexible printed circuit board with conductor tracks, a plastic with activated conductor tracks, a two-component injection molding with conductor tracks, or a slot antenna.

[0052] In addition, two additional lines are provided in the electrical supply cable. These two additional lines are connected to the RFID antenna in the second coupling device to supply the RFID antenna with power. These additional lines can have a smaller cross-section than the lines used to power the electric motor. The two lines are also directly connected to the RFID antenna. This ensures a reliable power supply to the RFID antenna in both the OFF and ON states.

[0053] One of the additional lines can be provided by a shield of the supply cable. Consequently, only one additional line needs to be provided in the electrical supply cable in addition to the lines used to supply the electric motor with power.

[0054] Alternatively, the additional lines can be provided by a coaxial cable. This suppresses the propagation of electromagnetic interference that occurs when supplying power to the RFID antenna.

[0055] Furthermore, the first and second coupling devices can each have a further coupling contact. The further coupling contacts can each be connected in parallel with the second coupling contact and configured to be electrically engaged at least in the OFF state. One of the further coupling contacts, preferably the further coupling contact in the first coupling device, can be connected in series with a detection resistor. The detection resistor can preferably be arranged in the application part and coded according to the application part. Consequently, the application part can be identified by measuring the detection resistance. Furthermore, in the ON state, a current is conducted not via the further coupling contacts, but via the second coupling contacts.

[0056] 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.

[0057] 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.

[0058] 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.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.

[0059] 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.

[0060] 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.

[0061] In order to read the data stored in the RFID chip, the surgical device has an RFID antenna which is arranged in the first coupling device and can be supplied with energy. The RFID antenna is adjacent, i.e. in the immediate vicinity, to the RFID chip 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 application part that has not been maintained. 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, a two-component injection molding with conductor tracks or as a slot antenna.

[0062] The first and second coupling devices each have two RFID coupling contacts that are electrically engaged at least in the OFF state. Preferably, the two RFID coupling contacts of the first and second coupling devices are also electrically engaged in the ON state. The two RFID coupling contacts are connected to the RFID antenna in the first coupling device. This means that the RFID antenna is connected between the two RFID coupling contacts in the first coupling device. The two RFID coupling contacts in the second coupling device are connected to two additional lines provided in the electrical supply cable for supplying the RFID antenna with power. Consequently, the RFID antenna can be reliably supplied with power.In the event that the RFID coupling contacts are electrically engaged even in the ON state, the RFID chip can be read by the RFID antenna even during operation of the application part.

[0063] One of the additional lines can be provided by a shield of the supply cable. Consequently, only one additional line is required in the electrical supply cable in addition to the lines used to supply power to the electric motor. Alternatively, the additional lines can be provided by a coaxial cable. This suppresses the propagation of electromagnetic interference generated when supplying power to the RFID antenna.

[0064] Furthermore, the first and second coupling devices can each have a further coupling contact. The further coupling contacts can each be connected in parallel with the second coupling contact and configured to be electrically engaged at least in the OFF state. One of the further coupling contacts, preferably the further coupling contact in the first coupling device, can be connected in series with a detection resistor. The detection resistor can preferably be arranged in the application part and coded according to the application part. Consequently, the application part can be identified by measuring the detection resistor. Furthermore, in the ON state, a current is conducted not via the further coupling contacts, but via the second coupling contacts.

[0065] Short description of the characters

[0066] The present disclosure is described below with reference to the figures. They show:

[0067] Fig. 1 shows a surgical device with a surgical application part and an electrical supply cable coupled together in an OFF state,

[0068] Fig. 2 shows the surgical device with the surgical application part and the electrical supply cable coupled together in an ON state,

[0069] Fig. 3 the surgical application part,

[0070] Fig. 4 shows a first coupling device of the surgical application part, Fig. 5 shows a sectional view of the surgical application part,

[0071] Fig. 6 the electrical supply cable,

[0072] Fig. 7 shows a coupling pin of a second coupling device of the electrical supply cable,

[0073] Fig. 8 is a rotated view of the coupling pin of the second coupling device,

[0074] Fig. 9 is a sectional view of the first and second clutch devices coupled together in the OFF state,

[0075] Fig. 10 is a detailed sectional view of the first and second clutch devices coupled together in the OFF state,

[0076] Fig. 11 is a further detailed sectional view of the first and second clutch devices coupled together in the OFF state,

[0077] Fig. 12 is another detailed sectional view of the first and second clutch devices coupled together in the OFF state,

[0078] Fig. 13 is a detailed sectional view of the first and second coupling devices coupled together in the ON state,

[0079] Fig. 14 is a further detailed sectional view of the first and second coupling devices coupled together in the ON state,

[0080] Fig. 15 is a schematic circuit diagram in the OFF state,

[0081] 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.

[0082] Fig. 18 is a schematic circuit diagram in the ON state,

[0083] Fig. 19 a first coupling device of the surgical application part,

[0084] Fig. 20 is a schematic circuit diagram in the OFF state, showing a conductive path for supplying energy to an RFID antenna,

[0085] Fig. 21 is a schematic circuit diagram in the ON state,

[0086] Fig. 22 is a schematic circuit diagram in the OFF state,

[0087] Fig. 23 is a schematic circuit diagram in the OFF state, and

[0088] Fig. 24 is a schematic circuit diagram in the OFF state.

[0089] Description of implementation examples

[0090] Embodiments 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.

[0091] Figures 1 and 2 show a surgical device 1 having a surgical application part 2, which may be, for example, a milling machine, a saw, etc., and an electrical supply cable 4. At a distal end of the application part 2, a tool 6 is attached, which can be driven by an electric motor 34 arranged in the application part 2 (see Fig. 15). 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 enables two switching states or coupling states, namely an OFF state (Fig. 1) and an ON state (Fig. 2).

[0092] 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 application part 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.

[0093] Fig. 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 designed as pins in this case. An RFID chip 26, which is designed 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, essentially flush with the inner surface of the coupling sleeve 16.

[0094] Fig. 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.

[0095] The interconnection of the coupling contacts 18, 20, 22, 24 will be explained with reference to 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 to the first coupling contact 18 in the application part 2 via the wire bridge 32. Fig. 6 shows the electrical supply cable 4, which has a second coupling device 42 at its distal end, which is 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 designed to be connectable to a control unit for operating the electric motor 34.

[0096] Figures 7 and 8 show 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 one 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., 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, a two-component injection molding with conductive tracks, or a slot antenna, can also be used. The second coupling device 42 has an electrical circuit 62 that is 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 to process the data received from the control unit, e.g., using one-wire technology, and write it to the RFID chip 26. Consequently, the electrical supply cable 4 can be of greater length without disrupting data transmission.

[0097] The interconnection of the coupling contacts 52, 54, 56, 58 is described with reference to 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.

[0098] Switching states of the coupling system 8 are described below. In 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 section 28, partially protrude into the designated coupling contacts 56 and 58, respectively, in the coupling pin 46. Consequently, the insulating section 30 is arranged outside the fourth coupling contact 58. In addition, the wire bridge 32, which connects the first coupling contact 18 to the fourth coupling contact 24, can be seen. The antenna 60 is arranged in the view shown in Fig. 9 such that the loop section is arranged behind the image plane along the circumferential direction in order to be arranged adjacent to the RFID chip 26. Fig. 10 also shows a case in which the coupling system 8 is in the OFF state.It can be seen that the second coupling contact 20 is shorter than the other coupling contacts 18, 22, 24, so that in the OFF state, it does not protrude into the second coupling contact 54 provided for this purpose in the coupling 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.

[0099] 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.

[0100] 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.

[0101] Figures 11 and 12 also show 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.

[0102] 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 with the second coupling device 42, so that the coupling pin 46 is fully inserted into the coupling sleeve 16. In this configuration, the insulating section 30 of the fourth coupling contact 24 lies opposite the conductive section 70 of the fourth coupling contact 58, and the conductive section 28 of the fourth coupling contact 24 lies opposite the insulating section 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 sections 30, 72 and the conductive sections 28, 70.As a result, an electrically conductive connection between the fourth coupling contacts 24, 58 is interrupted to avoid a short circuit of the motor windings 36, 38 of the electric motor 34 (see Fig. 15).

[0103] 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.

[0104] 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.

[0105] As indicated by an arrow in Fig. 16, 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.

[0106] Furthermore, 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 adjacently arranged 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.

[0107] Fig. 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.

[0108] 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.

[0109] 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.

[0110] Fig. 19 shows a further embodiment of a first coupling device 12, in which the fourth coupling contact 24 is formed without the insulating section 30. In the second coupling device 42, the fourth coupling contact 58 is also formed without the insulating section 72 in this case.

[0111] As can be seen in Fig. 20, the RFID antenna 60 is arranged in the second coupling device 42. The fourth coupling contact 24 is connected in parallel to the second coupling contact 20 in the first coupling device 12, preferably via the wire bridge 32. The fourth coupling contact 58 is connected in parallel to the second coupling contact 54 in the second coupling device 42. In addition, the fourth coupling contact 24 is connected in series to a detection resistor 61. The detection resistor 61 is thus arranged in the application part 2 and can be coded according to the type of the application part 2, so that a type of the application part 2 can be determined by measuring a resistance between the first line 64 and the second line 66 in the OFF state. In the OFF state, the RFID antenna 60 can be supplied with power along the arrow shown in Fig. 20.

[0112] Fig. 20 also shows an embodiment in which the third coupling contacts 22, 56 are electrically and mechanically disengaged in the OFF state. This embodiment is also applicable to the embodiment described with reference to Figs. 16 to 18. Furthermore, it is conceivable that the fourth coupling contacts 22, 56, which have the insulating sections 30, 72, could be applied to the embodiment shown in Fig. 20. Accordingly, the detection resistor 61 could also be omitted.

[0113] Fig. 21 shows that in the ON state, the second coupling contacts 20, 54 are also electrically engaged. Due to the detection resistor 61, a current from the second line 66 no longer flows via the fourth coupling contacts 24, 58, but rather via the second coupling contacts 20, 54.

[0114] In the exemplary embodiments described so far, the RFID antenna 60 was always arranged in the second coupling device 2. However, it is also conceivable for the RFID antenna 60 to be arranged adjacent to the RFID chip 26 in the first coupling device 12. The RFID antenna 60 is connected in series with the further coupling contact 24. In this case, no RFID antenna 60 is arranged on the coupling pin 46.

[0115] In addition, further embodiments are conceivable, which will be explained with reference to Figures 22 to 24.

[0116] Fig. 22 shows a circuit diagram in the OFF state according to another embodiment. It can be seen that the first and second coupling devices 12, 42 have only the first to third coupling contacts 18, 20, 22, 52, 54, 56. The RFID antenna 60 is arranged in the second coupling device 42 and is arranged adjacent to the RFID chip 26 in the OFF state and preferably also in the ON state. The RFID antenna 60 is connected and can be supplied with power via two lines 59A and 59B, which are provided in the electrical supply cable 4 in addition to the first to third lines 64, 66, 68. The two lines 59A and 59B are preferably provided by a coaxial cable. This type of power supply allows the RFID chip 26 to be read / written even during operation of the application part.However, it is also conceivable that one of the lines 59A or 59B is provided by the shield 69 of the electrical supply cable.

[0117] Fig. 23 shows a circuit diagram in the OFF state according to another embodiment. In this embodiment, the RFID antenna 60 is arranged in the first coupling device 12. The first and second coupling devices 12, 42 each have a first RFID coupling contact 25A, 63A and a second RFID coupling contact 25B, 63B, which are electrically engaged at least in the OFF state, but preferably also in the ON state. The RFID antenna 60 is connected in the first coupling device 12 between the first RFID coupling contact 25A and the second RFID coupling contact 25B. In the second coupling device 42, the first RFID coupling contact 63A is connected to the line 59A and the second RFID coupling contact 63B is connected to the line 59B.The RFID coupling contacts 25A, 25B, 63A, 63B can have a smaller diameter than the coupling contacts 18, 20, 22, 52, 54, 56, which serve to supply energy to the electric motor 34. Consequently, a reliable energy supply to the RFID antenna 60 can preferably also be provided during operation of the electric motor 34.

[0118] Fig. 24 shows a circuit diagram in the OFF state, which is similar to the circuit diagram of Fig. 22. Fourth or further coupling contacts 24, 58 are provided in the first and second coupling devices 12, 42. The fourth coupling contact 24 is connected in series with a detection resistor 61. The detection resistor 61 is thus arranged in the application part 2 and can be coded according to the application part 2. Accordingly, by measuring a resistance between the first line 64 and the second line 66 in the OFF state, a type of the application part 2 can be determined. This configuration with the fourth coupling contacts 24, 58 and the series-connected detection resistor 61 is also conceivable for the embodiment shown in Fig. 23. List of Reference Symbols

[0119] 1 surgical device

[0120] 2 surgical application part

[0121] 4 electrical supply cable

[0122] 6 Tools

[0123] 8 Coupling system

[0124] 10 Handle

[0125] 12 first coupling device

[0126] 14 coupling pins

[0127] 16 Coupling sleeve

[0128] 18 first clutch contact

[0129] 20 second coupling contact

[0130] 22 third clutch contact

[0131] 24 fourth coupling contact

[0132] 25A first RFID coupling contact

[0133] 25B second RFID coupling contact

[0134] 26 RFID chips

[0135] 28 leading section

[0136] 30 Insulation section

[0137] 32 wire bridge

[0138] 34 electric motor

[0139] 36 first motor winding

[0140] 38 second motor winding

[0141] 40 third motor winding

[0142] 42 second coupling device

[0143] 44 Coupling sleeve

[0144] 46 coupling pins

[0145] 48 cable sections

[0146] 50 Control unit coupling device

[0147] 52 first clutch contact

[0148] 54 second coupling contact third coupling contact fourth coupling contact A line B line

[0149] RFID antenna

[0150] Detection resistor electrical circuit A first RFID coupling contact B second RFID coupling contact first line second line third line

[0151] Shield conductive section insulating section

Claims

Claims 1. Surgical device (1) comprising: a surgical application part (2) which has an electric motor (34) with motor windings (36, 38, 40) and, at one end thereof, a first coupling device (12), 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 thereof, a second coupling device (42) which is designed to be coupled to the first coupling device (12), and, at its second end thereof, is connected or connectable to a control unit for controlling the electric motor (34), wherein the first and the second coupling devices (12, 42) are designed to be switched into a disconnected state or an OFF state in which first coupling contacts (18, 52) of the first and the 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 can be brought 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 first coupling device (12) and which can be supplied with energy, which is arranged adjacent to the RFID chip (26) 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 in that the first and second coupling devices (12, 42) each have a further coupling contact (24, 58), which are arranged to be electrically engaged at least in the OFF state,to supply the RFID antenna (60) with energy.

2. Surgical device (1) according to claim 1, characterized in 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, characterized in that the first and second coupling devices (12, 42) have third coupling contacts (22, 56) which are electrically disengaged in the OFF state and electrically engaged in the ON state.

4. Surgical device (1) according to one of claims 1 to 3, characterized in that the further coupling contact (24) in the first coupling device (12) is connected in parallel to the second coupling contact (20) via the RFID antenna (60).

5. Surgical device (1) according to one of claims 1 to 3, characterized in that the further coupling contact (24) in the first coupling device (12) is connected in parallel to the first coupling contact (18) via the RFID antenna (60).

6. Surgical device (1) according to one of claims 4 or 5, characterized in that the further coupling contact (58) in the second coupling device (42) is connected in parallel with the second coupling contact (54).

7. Surgical device (1) according to one of claims 4 or 5, characterized in that the further coupling contact (58) in the second coupling device (42) is connected to a shield (69) of the electrical supply cable (4).

8. Surgical device (1) according to one of claims 4, 6 or 7, characterized in that the further coupling contacts (24, 58) are designed so that they are also electrically engaged in the ON state, and one of the further coupling contacts (24, 58), preferably the further coupling contact (24), is connected in series to a detection resistor (61).

9. Surgical device (1) according to one of claims 4 to 7, characterized in that the further coupling contacts (24, 58) are designed such that they are electrically disengaged in the ON state.

10. Surgical device (1) according to claim 9, one of the further coupling contacts (24, 58), preferably the further coupling contact (24), is connected in series with a detection resistor (61).

11. Surgical device (1) according to claim 9 or 10, characterized in 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.

12. Surgical device (1) comprising: a surgical application part (2) which has 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 at least in the OFF state is arranged adjacent to the RFID chip (26) and is designed to excite the RFID chip (26),to transmit data between the RFID chip (26) and the control unit, in particular bidirectionally, characterized in that the first and second coupling devices (12, 42) each have a further coupling contact (24, 58) which are arranged to be electrically engaged at least in the OFF state in order to supply the RFID antenna (60) with energy.

13. Surgical device (1) according to claim 12, characterized in that the first and second coupling devices (12, 42) have third coupling contacts (22, 56) which are electrically engaged in the OFF state and in the ON state.

14. Surgical device (1) according to claim 12, characterized in that the first and second coupling devices (12, 42) have third coupling contacts (22, 56) which are electrically disengaged in the OFF state and electrically engaged in the ON state.

15. Surgical device (1) according to one of claims 12 to 14, characterized in that the further coupling contact (24) in the first coupling device (12) is connected in parallel with the second coupling contact (20).

16. Surgical device (1) according to one of claims 12 to 14, characterized in that the further coupling contact (24) in the first coupling device (12) is connected in parallel with the first coupling contact (18).

17. Surgical device (1) according to one of claims 15 or 16, characterized in that the further coupling contact (58) in the second coupling device (42) is connected in parallel to the second coupling contact (54) via the RFID antenna (60).

18. Surgical device (1) according to one of claims 15 or 16, characterized in that the further coupling contact (58) in the second coupling device (42) is connected to a shield (69) of the electrical supply cable (4) via the RFID antenna (60).

19. Surgical device (1) according to one of claims 15, 17 or 18, characterized in that the further coupling contacts (24, 58) are designed such that they are electrically engaged even in the ON state, and one of the further coupling contacts (24, 58), preferably the further coupling contact (24), is connected in series to a detection resistor (61).

20. Surgical device (1) according to one of claims 15 to 18, characterized in that the further coupling contacts (24, 58) are designed such that they are electrically disengaged in the ON state.

21. Surgical device (1) according to claim 20, one of the further coupling contacts (24, 58), preferably the further coupling contact (24), is connected in series to a detection resistor (61).

22. Surgical device (1) according to claim 20 or 21, characterized in 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.

23. Surgical device (1) comprising: a surgical application part (2) which has an electric motor (34) with motor windings (36, 38, 40) and at one end thereof a first coupling device (12), 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 thereof a second coupling device (42) which is designed to be coupled to the first coupling device (12), and at its second end is connected or connectable to a control unit for controlling the electric motor (34), wherein the first and the second coupling devices (12, 42) are designed to be in a disconnected state or in an OFF state in which first coupling contacts (18, 52) of the first and the 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 can be brought 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 which can be supplied with energy, which is arranged adjacent to the RFID chip (26) at least in the OFF state, and preferably also in the ON 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 in that two further lines (59A, 59B) are provided in the electrical supply cable (4) and are connected to the RFID antenna (60) in the second coupling device (42) in order to supply the RFID antenna (60) with energy.

24. Surgical device (1) according to claim 23, characterized in that one of the further lines (59A, 59B) is provided by a shield (69) of the supply cable (4).

25. Surgical device (1) according to claim 23, characterized in that the further lines (59A, 59B) are provided by a coaxial cable.

26. Surgical device (1) according to one of claims 23 to 25, characterized in that the first and the second coupling device (12, 42) each have a further coupling contact (24, 58), which are each connected in parallel with the second coupling contact (20, 54) and are arranged such that they are electrically engaged at least in the OFF state, and one of the further coupling contacts (24, 58), preferably the further coupling contact (24), is connected in series with a detection resistor (61).

27. Surgical device (1) comprising: a surgical application part (2) which has 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 the second coupling devices (12, 42) are designed to be in a disconnected state or an OFF state, in which first coupling contacts (18, 52) of the first and the second coupling devices (12, 42) are electrically engaged and second coupling contacts (20, 54) of the first and the second coupling devices (12, 42) are electrically disengaged, or in an ON state, in which the first coupling contacts (18, 52) of the first and the second coupling devices (12, 42) and the second coupling contacts (20,54) of the first and the second coupling device (12, 42) are electrically engaged, an RFID chip (26) arranged in the first coupling device (12), and an RFID antenna (60) arranged in the first coupling device (12) and which can be supplied with energy, which is arranged adjacent to the RFID chip (26) 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 in that the first and the second coupling device (12, 42) each have two RFID coupling contacts (25A, 25B, 63A, 63B) which are electrically engaged at least in the OFF state, and preferably also in the ON state, the two RFID coupling contacts (25A, 25B) in the first coupling device (12) are connected to the RFID antenna (60), and the two RFID coupling contacts (64A, 63B) in the second coupling device (42) with two further lines (59A,59B), which are provided in the electrical supply cable (4) for supplying the RFID antenna (60) with energy.

28. Surgical device (1) according to claim 27, characterized in that one of the further lines (59A, 59B) is provided by a shield (69) of the supply cable (4).

29. Surgical device (1) according to claim 27, characterized in that the further lines (59A, 59B) are provided by a coaxial cable.

30. Surgical device (1) according to one of claims 27 to 29, characterized in that the first and the second coupling device (12, 42) each have a further coupling contact (24, 58) which are arranged such that they are electrically engaged at least in the OFF state, and at least one of the further coupling contacts (24, 58), preferably the further coupling contact (24), is connected in series to a detection resistor (61).

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