AEROSOL GENERATOR SYSTEM WITH IMPROVED ELECTRICAL CONNECTOR

Abstract

An electrically operated aerosol generating system (100), an electrically operated aerosol generating device (101), a charging unit (103) for an electrically operated aerosol generating system (100), and an electrical connector for an aerosol generating system (100). The electrically operated aerosol generating system (100) comprises an aerosol generating device (101), a charging unit (103) configured to receive the aerosol generating device (101), and a first connecting part (1) and a second connecting part (21). The aerosol generating device (101) has one of the first connecting part (1) and the second connecting part (21), and the charging unit (103) has the other of the first connecting part (1) and the second connecting part (21).The first connecting part (1) comprises: a first electrical contact (3); a second electrical contact (4) essentially surrounding the first electrical contact (3); and a third electrical contact (5) essentially surrounding the second electrical contact (4). The second connecting part (21) comprises: a face (26) and a projection (27) essentially centered on the face (6); a first electrical contact (23) on the projection (27); a second electrical contact (24) on the face (26), radially outward from the first electrical contact (23); and a third electrical contact (25) on the face (26), radially outward from the second electrical contact (23). The first and second connecting parts (1, 21) are arranged such that when the aerosol generating device (101) is received by the charging unit (103), the first and second connecting parts (1, 21) are electrically connected.The electrical contacts of the first and second connecting part (1, 21) are arranged so that when the first and second connecting part are electrically connected: the first electrical contact (3) of the first connecting part (1) is electrically coupled to the first electrical contact (23) of the second connecting part (21); the second electrical contact (4) of the first connecting part (1) is electrically coupled to one of the second electrical contact (24) and the third electrical contact (25) of the second connecting part (21); and the third electrical contact (5) of the first connecting part (1) is electrically coupled to the other of the second electrical contact (24) and the third electrical contact (25) of the second connecting part (21), regardless of the angular position of the second connecting part (21) with respect to the first connecting part (1).

Description

AEROSOL GENERATOR SYSTEM WITH IMPROVED ELECTRICAL CONNECTOR This description pertains to electrically operated aerosol generating systems. In particular, this description pertains to electrically operated aerosol generating systems comprising an aerosol generating device and a charging unit. This description also pertains to electrical connectors for electrically operated aerosol generating systems. Electrically operated aerosol generating systems generally comprise an aerosol-forming substrate and a heater, which heats the substrate to form an aerosol for inhalation by the user. Typically, these systems also include an aerosol-generating device with an electrical power supply to power the heater. The heater may be a resistive electric heater, an induction heater, or a similar device. In some systems, the aerosol-generating device is configured to receive an aerosol-generating article comprising a solid aerosol-forming substrate, such as a crinkled sheet of tobacco. In these systems, the device typically includes a heater, which is arranged to heat the aerosol-forming substrate when the article is received into the device. The article may further include a filter, which is wrapped together with the aerosol-forming substrate in the form of a stick, similar to a conventional cigarette. In other systems, the device is configured to receive a cartridge comprising the heater and a liquid aerosol-forming substrate. Cartridges are often referred to as cartomizers. Common types of heaters used in cartomizers comprise a coil of heating wire wound around an elongated wick soaked in a liquid aerosol-forming substrate. Some electrically operated aerosol generating systems include a charging unit to recharge the electrical power supply of the electrically operated aerosol generating device. The charging unit may comprise a housing, a rechargeable electrical power supply housed within the housing, and a cavity to receive the electrically operated aerosol generating device. Typically, charging units are portable and can be carried with the device by a user to extend the device's operating time. It would be beneficial to improve the speed and ease with which a user can electrically connect an aerosol generator and a charging unit. It would also be beneficial to provide an electrical connector for an electrically operated aerosol generator system that allows for electrical connection between the aerosol generator and the charging unit at any angle. Furthermore, it would be beneficial to provide an electrical connector for an electrically operated aerosol generator system that allows for electrical connection between the aerosol generator and the charging unit even when the aerosol generator is not fully aligned with the charging unit. According to one aspect of the description, an electrically operated aerosol generating system is provided, comprising an aerosol generating device, a charging unit configured to receive the aerosol generating device, and a first connector and a second connector. The aerosol generating device may have one of the first connector and the second connector, and the charging unit has the other of the first connector and the second connector. The first connector may comprise: a first electrical contact; a second electrical contact essentially enclosing the first electrical contact; and a third electrical contact essentially enclosing the second electrical contact.The second connecting part may comprise: a face and a projection arranged essentially in the center of the face; a first electrical contact disposed on the projection; a second electrical contact disposed on the face, radially separated outwards from the first electrical contact; and a third electrical contact disposed on the face, radially separated outwards from the second electrical contact. The first and second connecting parts are arranged such that when the aerosol generating device is received by the charging unit, the first and second connecting parts are electrically connected.The electrical contacts of the first and second connecting parts are arranged so that when the first and second connecting parts interact electrically: the first electrical contact of the first connecting part is electrically connected to the first electrical contact of the second connecting part; the second electrical contact of the first connecting part is electrically connected to one of the second electrical contacts and the third electrical contact of the second connecting part; and the third electrical contact of the first connecting part is electrically connected to the other of the second electrical contact and the third electrical contact of the second connecting part, regardless of the angular position of the second connecting part relative to the first connecting part. The first and second connector parts described herein enable electrical connection between an aerosol generating device and a charging unit regardless of the angular position of the device relative to the charging unit. Advantageously, this can improve the speed and ease with which a user can electrically connect an aerosol generating device and a charging unit. For example, this can allow a user to electrically connect a device and a charging unit when the device and charging unit are not visible, such as in the dark or when the user's attention is focused elsewhere. In preferred embodiments, the projection of the second connecting part is defined by an end face and at least one side wall extending between the end face and the projection face. Most preferably, the first electrical contact of the second connecting part is arranged on at least one side wall of the projection. No electrical contacts are arranged on the end face of the second connector's projection. In other words, the end face of the second connector's projection does not contain an electrical contact. More specifically, there is no electrical contact located in the center of the end face of the connector's projection. The only electrical contact, or contacts, on the projection are located on at least one side wall of the projection. Advantageously, this can provide a robust electrical connector that can be connected and disconnected a large number of times without damaging the electrical contacts of either connector. Unwanted contact can occur between the end face of the second connector's projection and the first connector during connection and disconnection due to misalignment of the first and second connectors. For example, when the loading unit has a cavity to receive an aerosol-generating device, and the cavity has a longitudinal axis, a connector part of an aerosol-generating device received in the cavity may be misaligned with the connector part of the loading unit if the aerosol-generating device is not aligned with the longitudinal axis of the cavity. Such misalignment of the aerosol-generating device in the cavity can result in the first connector inconveniently colliding with the first contact of the end face of the second connector's projection. Such unwanted contact can cause damage to the end face of the projection.By not placing an electrical contact on the end face of the projection of the second connector part, the second connector part becomes more resistant to damage during normal use. In some cases, it may be advantageous to provide a loading unit with a cavity to receive an aerosol generating device that has a larger diameter or width than the aerosol generating device itself. Providing a loading unit with a cavity to receive an aerosol generating device with a larger diameter or width than the aerosol generating device itself can facilitate inserting the aerosol generating device into the loading unit cavity. However, providing a loading unit with a cavity that is larger than the aerosol generating device can also increase the risk of misalignment between the first and second connecting parts when the aerosol generating device is inserted into the cavity.Advantageously, providing an aerosol generating system with an electrical connector according to the present description may allow a loading unit to comprise a cavity with a large diameter to facilitate the insertion of the aerosol generating device into the cavity, without significantly increasing the risk of damaging the first and second connector parts during connection and disconnection. In some preferred cases, it may be convenient to provide a loading unit with a cavity for receiving an aerosol generating device, configured to receive the device laterally. In other words, the cavity for receiving an aerosol generating device may have an opening on one side to receive the device. In these cases, the loading unit cavity may consist of two closed ends separated longitudinally, and a side wall extending between the two closed ends may define the base of the cavity. In these cases, the side wall and the closed ends define a channel in which an aerosol generating device can be seated.One side of the cavity may be open so that an aerosol generating device can be inserted by moving it sideways or laterally within the cavity, in a direction perpendicular to the longitudinal direction. This facilitates both the insertion and removal of the aerosol generating device. Advantageously, providing an aerosol generating system with a loading unit that has a cavity configured to receive the aerosol generating device laterally with an electrical connector, as described herein, minimizes the risk of damaging the first and second connecting parts during connection and disconnection due to the lateral movement of the aerosol generating device into the cavity. In preferred embodiments, the first connecting part comprises a face and a recess arranged essentially in the center of the face. The projection of the second connecting part can be received in the recess of the first connecting part. Preferably, the first electrical contact of the first connecting part is arranged within the recess. Preferably, the second electrical contact of the first connecting part is arranged on the face, the second electrical contact being radially separated from the recess by a first distance. Preferably, the third electrical contact of the first connecting part is arranged on the face, the third electrical contact being radially separated from the recess by a second distance greater than the first distance. Preferably, the recess is defined by a closed end face, an open end face, and at least one side wall extending between the open end and the closed end face. Preferably, the first electrical contact of the first connecting part is arranged on at least one side wall of the recess. Preferably, no electrical contacts are arranged on the closed front surface of the recess in the first connecting part. In other words, the end face of the recess in the first connecting part does not comprise an electrical contact. More particularly, there is no electrical contact arranged in the center of the recess in the first connecting part. The only electrical contact, or contacts, arranged within the recess are located on at least one side wall of the recess. As used herein, the term aerosol generating device refers to a device that interacts with an aerosol-forming substrate to generate an aerosol that is inhaled directly into the lungs of a user through the user's mouth. In certain embodiments, an aerosol generating device may heat the aerosol-forming substrate to facilitate the release of volatile compounds. An aerosol generating device may interact with an aerosol-generating article comprising an aerosol-forming substrate or a cartridge comprising an aerosol-forming substrate. An electrically operated aerosol generating device may comprise a heater, such as an electric resistive heater, an inductive heater, etc., for heating the aerosol-forming substrate to form an aerosol. As used herein, the term "aerosol-generating article" refers to an article comprising an aerosol-forming substrate capable of releasing volatile compounds that can form an aerosol. In certain embodiments, the aerosol-generating article may comprise an aerosol-forming substrate capable of releasing volatile compounds upon heating that can form an aerosol. As used in the present description, electrical coupling is used to describe an electrical connection or electrical contact between the first and second connecting parts that allows an electric current to flow between the first and second connecting parts. As used in this description, “angular position” is used to describe the orientation or relative rotational position of one component with respect to another component about an axis. As used in this description, the terms “upstream,” “downstream,” “next,” and “distal” are used to describe the relative positions of components, or portions of components, of aerosol generating devices, aerosol generating articles, and loading units. As used in the present description, the term longitudinal is used to describe the direction between the mouth-side or proximal or downstream end and the opposite distal or upstream end, and the term “transverse” is used to describe the direction perpendicular to the longitudinal direction. As used in this description, the term “length” is used to describe the maximum longitudinal dimension between the upstream or distal end and the downstream or proximal end of components, aerosol generating devices, aerosol generating articles, and loading units. As used in this description, the term diameter is used to describe the maximum cross-sectional dimension of components, aerosol generating devices, aerosol generating articles, and charging units. As used in the present description, the term “cross section” is used to describe the cross section of the components, aerosol generating devices, aerosol generating articles, and loading units in the direction perpendicular to the major axis of the components, aerosol generating devices, aerosol generating articles, and loading units, respectively. At least one electrical contact on each of the first and second connector parts may be configured to transfer, carry, or supply power from the charging unit to the aerosol generating device. For example, the first electrical contact on each of the first and second connector parts may be configured to transfer power from the charging unit to the aerosol generating device. In particular, at least one electrical contact on each of the first and second connector parts may be configured to transfer power from an electrical power supply of the charging unit to a rechargeable electrical power supply of the aerosol generating device. Preferably, the second electrical contact on each of the first and second connector parts may be configured to transfer power from the charging unit to the aerosol generating device.At least one of the electrical contacts on each of the first and second connector parts can also be configured as a ground connection. For example, the third electrical contact on each of the first and second connector parts can be configured as a ground connection. At least one of the electrical contacts on each of the first and second connector parts can be configured to transfer data from at least one of the charging unit to the aerosol generating device and from the aerosol generating device to the charging unit. In some embodiments, at least one of the electrical contacts on each of the first and second connector parts can be configured to transfer data from the charging unit to the aerosol generating device. This can advantageously allow software updates to be transferred from the charging unit to the aerosol generating device. In some embodiments, at least one of the electrical contacts on each of the first and second connector parts can be configured to transfer data from the aerosol generating device to the charging unit. This can allow usage data to be transferred from the aerosol generating device to the charging unit. Usage data may include, for example, one or more of the charging status of the device's rechargeable power supply, the number of device uses, the number of heater uses, and identification information of the aerosol-forming substrate.The third electrical contact of each of the first and second connector parts can be configured to transfer data from the charging unit to the aerosol generating device. The second electrical contact of each of the first and second connector parts can be configured to transfer data from the charging unit to the aerosol generating device. Preferably, the first electrical contact of each of the first and second connector parts is configured to transfer data from the charging unit to the aerosol generating device. The first and second connector parts described can be configured to transfer power from the charging unit to the aerosol generating device and to transfer data from at least one of the charging units to the device and from the device to the charging unit. Advantageously, this allows the device to comprise only a single electrical connector part. This can reduce the size and weight of the aerosol generating device compared to a device with multiple electrical connector parts. Typically, the aerosol generating device may include a rechargeable electrical power supply. The rechargeable electrical power supply may include any suitable type of rechargeable electrical power supply, such as batteries or capacitors. The rechargeable electrical power supply may include a lithium-ion battery. The rechargeable electrical power supply of the aerosol generating device may have sufficient capacity to enable the aerosol generating device to deliver one or more user experiences. A user experience typically comprises a series of puffs in which a user draws from the aerosol generating device, the aerosol generating device generates an aerosol by atomizing an aerosol-forming substrate, and the user inhales the aerosol generated by the device.The number of puffs that constitute a typical user experience can be any suitable amount. Typically, the number of puffs can range from two to twenty puffs, from four to twelve puffs, or from approximately six to seven puffs. The rechargeable power supply of the aerosol generator can have sufficient capacity for the device to deliver any suitable number of user experiences. The rechargeable power supply can have sufficient capacity for the device to deliver one, two, three, four, five, or six user experiences. Similarly, the charging unit may comprise an electrical power supply. The electrical power supply of the charging unit may comprise any suitable type of electrical power supply, such as batteries and capacitors. The electrical power supply of the charging unit may comprise a lithium-ion battery. The first and second parts of the connector described may allow energy to be transferred between the electrical power supply of the charging unit and the rechargeable electrical power supply of the aerosol generator device to charge the rechargeable electrical power supply of the aerosol generator device. Advantageously, this may extend the service life of the aerosol generator device.The power supply of the charging unit can have sufficient capacity to provide the aerosol generator with enough charge to deliver a plurality of user experiences. The power supply of the charging unit can have sufficient capacity to provide the aerosol generator with enough charge to deliver any suitable number of user experiences, such as between one and twenty user experiences, between five and fifteen user experiences, and approximately ten user experiences.Advantageously, this can allow a user carrying both the aerosol generator device and the charging unit to use the aerosol generator device for an extended period of time, such as over a day or a week, without connecting the aerosol generator device to an external electrical power supply, such as a household power supply, to charge the rechargeable electrical power supply of the aerosol generator device. cnacnn / cznz / B / Yi Typically, the charging unit's power supply is rechargeable. The charging unit's power supply may have a higher capacity than the rechargeable power supply of the aerosol generator. The charging unit's power supply may also be physically larger than the rechargeable power supply of the aerosol generator. In some embodiments, the first electrical contacts of the first and second connector parts can be configured to transfer data between the charging unit and the aerosol generating device, the second electrical contacts of the first and second connector parts can be configured to transfer power between an electrical power supply of the charging unit and a rechargeable electrical power supply of the aerosol generating device, and the third electrical contacts of the first and second connector parts can be configured as a ground connection. The aerosol generating device can be a portable device. In other words, the aerosol generating device can be any size and shape suitable for holding in a user's hand. The aerosol generating device can be similar in size and shape to a conventional cigarette or tobacco. The aerosol generating device can be portable. Typically, the loading unit can also be portable. The loading unit can be any suitable size and shape. The loading unit can be similar in size and shape to a conventional pack of cigarettes. Providing a portable loading unit allows a user to carry the loading unit with the aerosol generating device.Advantageously, this can allow the rechargeable electrical power supply of the aerosol generator device to be made smaller and lighter without sacrificing the operating life of the aerosol generator device, which can be charged from the portable charging unit carried by the user when the rechargeable power supply of the device is depleted. The electrical contacts of the first and second connecting parts can be made of any suitable electrically conductive material. For example, the electrical contacts can be made of a metal such as copper or gold. In some embodiments, the electrical contacts are made of the same material, and in other embodiments, the electrical contacts are made of different materials. Typically, the electrical contacts of each of the first and second connector parts are electrically separated or isolated from each other. The first, second, and third electrical contacts of the first connector part may be electrically separated or isolated from each other. Similarly, the first, second, and third electrical contacts of the second connector part may be electrically separated or isolated from each other. Electrical separation or isolation of the electrical contacts of each connector part may be provided by an electrically insulating material placed between adjacent electrical contacts. Electrical separation or isolation may also be provided by separating adjacent electrical contacts. As used herein, electrical conductivity refers to a material having an electrical resistivity of 1 x 10⁴ Ωη or less. As used herein, electrical insulator refers to a material having an electrical resistivity of 1 x 10⁴ Ωη or more. The electrical contacts of the first and second connecting parts can be any suitable type of electrical contact. Electrical contacts can be resilient contacts. For example, electrical contacts can be spring contacts. Electrical contacts can be pin contacts. Pin contacts can extend or project outward from a surface, typically essentially perpendicular to the plane of the surface. Pin contacts can be resilient pin contacts or pogo pin contacts. In other words, pin contacts can be spring-loaded or resilient contacts. Electrical contacts can be board contacts. Board contacts can extend essentially on or in a plane or on or along a surface. Electrical contacts can be provided on a printed circuit board.In some embodiments, all electrical contacts may be of the same type. In other embodiments, the electrical contacts may comprise different types. The electrical contacts of the first connecting part may comprise one type of electrical contact, and the electrical contacts of the second connecting part may comprise a different type. The first, second, and third electrical contacts of the first connecting part may be of the same type of electrical contact. Typically, the electrical contacts of the first connecting part are plate contacts. In other words, the electrical contacts of the first connecting part typically extend essentially on or in a plane or along a surface of the first connecting part. Typically, the first connecting part comprises one or more surfaces, and each of the first, second, and third electrical contacts of the first connecting part extends essentially on or along one or more of the surfaces of the first connecting part. The first, second, and third electrical contacts of the first connector part can be arranged in any suitable arrangement. cnacnn / cznz / B / Yi In some embodiments, the first, second, and third electrical contacts of the first connecting part are essentially annular. In other words, each of the first, second, and third electrical contacts of the first connecting part can form a ring. The first, second, and third electrical contacts of the first connecting part can form concentric rings. In some specific modalities: The first electrical contact of the first connecting part is essentially circular and is arranged around at least one side wall of the recess; The second electrical contact of the first connecting part is arranged on the face and forms a ring that circumscribes the recess and the first electrical contact; and the third electrical contact of the first connecting part is arranged on the face and forms a ring that circumscribes the recess and the first and second electrical contacts. The first, second, and third electrical contacts of the second connecting part may be of the same type. Typically, the electrical contacts of the second connecting part are pin contacts. In other words, the electrical contacts of the second connecting part typically extend outward from a plane or surface of the second connecting part, typically essentially perpendicular to the plane or surface. Typically, the second connecting part comprises parallel surfaces on which the first, second, and third electrical contacts are disposed. In these embodiments, each of the first, second, and third electrical contacts of the first connecting part extends perpendicularly from the surface on which it is disposed. The electrical contacts of the second electrical connector can be flexible electrical contacts. In particular, the electrical contacts of the second electrical connector can be pogo pin electrical contacts. Pogo pin electrical contacts can advantageously help maintain a reliable electrical connection between the first and second connectors when these two parts are electrically connected and exposed to vibrations and minor movements caused by the user. In some preferred embodiments, the first, second, and third electrical contacts of the second connector may extend in essentially different directions. The second and third electrical contacts may extend in the same essentially parallel direction, and the first electrical contact may extend in a different direction, essentially perpendicular to the direction of the first and third electrical contacts. Preferably, the first connecting part comprises an essentially flat face and a recess disposed essentially in the center of the essentially flat face. The recess may extend inward, essentially perpendicularly from the flat face. The recess may have a closed end, an open end on the face, and at least one side wall extending between the open end and the closed end. The first electrical contact of the first connecting part may be disposed within the recess. Preferably, the first electrical contact is disposed on at least one side wall of the recess. The first electrical contact may essentially circumscribe the closed end of the recess. The second electrical contact of the first connecting part is disposed on the face and essentially circumscribes the recess and the first electrical contact.The third electrical contact of the first connecting part is located on the face and essentially circumscribes the recess and the first and second electrical contacts. Preferably, the second connecting part comprises an essentially flat face and a projection disposed essentially at the center of the flat face. The projection may extend outward from the face, essentially perpendicular to the plane of the face. The projection may be configured to be received in the recess of the first connecting part. The projection may have an end face and at least one side wall extending between the face and the end face of the projection. The first electrical contact of the second connecting part may be disposed on at least one side wall of the projection. The second electrical contact of the second connecting part may be disposed on the flat face. The third electrical contact of the second connecting part may be disposed on the flat face. The second electrical contact of the second connecting part may be radially separated from the projection by a first distance. The third electrical contact of the second connecting part may be radially separated from the projection by a second distance. The second distance may be greater than the first distance. The first and second connecting parts can be electrically coupled by inserting the projection of the second connecting part into the recess of the first connecting part. The projection may be tapered. The projection may have a width or diameter on the face that is greater than the width or diameter of the projection on the end face. Advantageously, this can facilitate the insertion of the projection of the second connecting part into the recess of the first connecting part where the face of the first connecting part is not aligned with the face of the second connecting part. In other words, this can facilitate the insertion of the projection into the recess where the first connecting part is angled toward the second connecting part. The contact surface between the end face of the projection and at least one side wall of the projection may be rounded. The contact surface between the end face of the projection and at least one side wall of the projection may be beveled.Advantageously, providing a rounded or beveled interface between the end face of the projection and at least one side wall of the projection can further facilitate insertion of the projection into the recess where the first and second connecting parts are not fully aligned. When the first and second connecting parts are electrically connected: the first electrical contact of the second connecting part, on at least one side wall of the projection, can be electrically connected to the first electrical contact of the first connecting part, on at least one side wall of the recess; The second electrical contact of the second connector part, on the face of the second connector part, can be electrically connected to the second electrical contact of the first connector part, on the face of the first connector part; and the third electrical contact of the second connector part, on the face of the second connector part, can be electrically connected to the third electrical contact of the first connector part, on the face of the first connector part. In these particular embodiments, the recess and projection of the first and second connecting parts can be essentially circular in shape. This allows the first and second connecting parts to rotate freely relative to each other around the axes of the recess and projection. This, in turn, allows the first and second connecting parts to be electrically connected regardless of the angular position of the first connecting part relative to the second. The second electrical contact of the second connecting part, located on at least one side wall of the projection, can fit snugly within the recess of the first connecting part, for example, by friction or pressure, to achieve a reliable electrical connection with the second electrical contact of the first connecting part on at least one side wall of the recess. The second electrical contact of the second connecting part and the recess can be configured so that the second electrical contact of the second connecting part is press-fitted into the recess when the projection is received in the recess and the first and second connecting parts are electrically connected. The first and second connector parts can have any suitable additional number of electrical contacts, and the additional electrical contacts can be configured to perform any desired function. In particular, the second connecting part may comprise a fourth electrical contact. The fourth electrical contact may be arranged on the face. The fourth electrical contact can be radially separated from the projection by the first distance. In other words, the fourth electrical contact can be radially separated from the projection by the same distance as the second electrical contact. The fourth electrical contact of the second connecting part can be arranged to make contact with the second electrical contact of the first connecting part when the first and second connecting parts are electrically connected. The fourth electrical contact of the second connecting part can be arranged to make electrical contact with the second electrical contact of the first connecting part when the first and second connecting parts are electrically connected. Preferably, the fourth electrical contact is radially separated from the projection by the second distance. In other words, the fourth electrical contact may be radially separated from the projection by the same distance as the third electrical contact. The fourth electrical contact of the second connecting part may be arranged to make contact with the third electrical contact of the first connecting part when the first and second connecting parts are electrically connected. The fourth electrical contact of the second connecting part may be arranged to make electrical contact with the third electrical contact of the first connecting part when the first and second connecting parts are electrically connected. The fourth electrical contact may be angledly separated from the third electrical contact of the second connecting part. The fourth electrical contact can be configured as an insertion-sensing contact to detect when the first and second connecting parts are electrically connected. The fourth electrical contact can be configured to detect when the first and second connecting parts are electrically connected in any suitable way. In one specific example, the fourth electrical contact is configured to connect to ground on the first connecting part. Therefore, a controller can detect when the fourth contact has been grounded, indicating that the first and second connecting parts are electrically connected. In another example, the fourth electrical contact could be a spring-loaded pin contact in communication with a switch that closes when the spring-loaded pin contact is compressed. The switch can be connected to the charge unit controller, which can be configured to determine that the first connector is electrically connected to the second connector when the switch is closed. The recess may have any suitable shape and dimensions. The recess may be essentially cylindrical. The recess may have an essentially circular cross-section. The diameter of the recess is less than the diameter of the face. The diameter of the recess may be equal to or less than 75% of the face diameter, or it may be equal to or less than approximately 21% of the face diameter. The projection can have any suitable shape and dimensions. The projection can be essentially cylindrical. The projection can have an essentially circular cross-section. The diameter of the projection is less than the diameter of the face. The diameter of the projection can be equal to or less than 75% of the diameter of the face, or it can be equal to or less than approximately 21% of the diameter of the face. In some forms, the intersection between the end face and at least one side wall of the projection may be inclined, beveled, or chamfered to facilitate placement of the projection in the recess of the first connecting part. The second connecting part may comprise a body on which the electrical contacts are mounted. The projection may be integrally formed with the body or may be a separate part that is attached to a portion of the main body. The aerosol generating device has one first connector and one second connector, and the charging unit has the other first connector and one second connector. In some embodiments, the first connector may be provided on the device and the second connector on the charging unit. When the electrical contacts of the second connector are pin contacts, it may be advantageous to provide the second connector on the charging unit, as the charging unit can provide better protection against damage to the pin contacts. The aerosol-generating device may have a proximal end and a distal end opposite the proximal end. The proximal end may be the end from which a user draws the aerosol-generating device to inhale the aerosol it produces. Therefore, the proximal end may also be referred to as the mouth-side end. One of the first and second connecting parts may be provided on the distal end of the aerosol-generating device. One of the first and second connecting parts may be provided on a distal end face of the aerosol-generating device. The aerosol generating device can be any suitable size and shape. The aerosol generating device can have a cross-section of any suitable shape. For example, the aerosol generating device may have an essentially circular, elliptical, triangular, square, rhomboidal, trapezoidal, pentagonal, hexagonal, or octagonal cross-section. In some particular embodiments, the aerosol generating device has an essentially circular cross-section. The aerosol generating device may have an essentially constant cross-section along its length. The aerosol generating device may have an essentially circular cross-section along its length. The device may have rotational symmetry about its longitudinal axis. The device may have rotational symmetry of an order greater than one about its longitudinal axis. The device may be essentially asymmetric about its longitudinal axis. In particular embodiments, the aerosol generating device may be an essentially circular cylinder. The aerosol-generating device can have any suitable diameter and length. It can also be elongated. In some specific embodiments, the aerosol-generating device may have a shape, diameter, and length essentially similar to a conventional cigarette or tobacco. The aerosol-generating device may have a length of between approximately 30 mm and approximately 121 mm, or between approximately 21 mm and 120 mm, or between approximately 90 mm and 100 mm. The aerosol-generating device may have an external diameter of between approximately 5 mm and approximately 30 mm, or between approximately 10 mm and approximately 20 mm, or approximately 25 mm. The aerosol generating device may be configured to receive one or more cartridges, a heater, and an aerosol generating item. The device may be configured to receive one or more cartridges, a heater, and an aerosol generating item at a proximal end. The device may include a cavity for receiving one or more cartridges, a heater, and an aerosol generating item. In some embodiments, the aerosol generating device may include a heater. When the aerosol generating device includes a heater, the device may be configured to receive an article comprising an aerosol-forming substrate or a cartridge comprising an aerosol-forming substrate. In other embodiments, the aerosol generating device may be configured to receive a heater or a combination of a heater and an article or cartridge comprising an aerosol-forming substrate. When the device includes a cavity for receiving one or more cartridges and an aerosol-generating article, the atomizer may be disposed in the cavity. The device may comprise one of the first and second connecting parts at the distal end of the device. The device may comprise one of the first and second connecting parts on a distal end face of the device. In other words, a face at the distal end of the device, opposite the mouth-side end, may comprise one of the first and second connecting parts. The distal end face of the device may be essentially circular. The aerosol generating device may comprise a housing. In particular embodiments, the housing may be an essentially circular cylinder. The housing may comprise any suitable material or combination of materials. Examples of suitable materials include metals, alloys, plastics or composite materials containing one or more of these materials, or thermoplastics suitable for food or pharmaceutical applications, for example, polypropylene, polyetheretherketone (PEEK), and polyethylene. In particular embodiments, the material is lightweight and non-brittle. The rechargeable electrical power supply for the aerosol generating device may be housed within the housing. The housing may include a cavity for receiving one or more aerosol generating items and a cartridge. The aerosol generating device may include a heater. The heater may be an electric resistive heater, an induction heater, etc. When the device includes a cavity for receiving an aerosol generating item or a cartridge, the heater may be arranged within the cavity. The aerosol generating device may include electrical circuits. These circuits may be configured to control the transfer of power from the charging unit to the aerosol generating device when the first and second connector parts are electrically coupled. The electrical circuits may also be configured to control the transfer of data from one or more of the charging units to the aerosol generating device and from the aerosol generating device to the charging unit. The electrical circuits may include a microprocessor. The electrical circuit may also include a controller, such as a microcontroller. The load unit can be any suitable size and shape. The charge unit may have a cross-section of any suitable shape. For example, the charge unit may have an essentially circular, elliptical, triangular, square, rhomboidal, trapezoidal, pentagonal, hexagonal, or octagonal cross-section. In some particular embodiments, the aerosol generating device has an essentially rectangular cross-section. cnacnn / cznz / B / Yi The unit load may have an essentially constant cross-section along its length. The unit load may have an essentially rectangular cross-section along its length. In particular embodiments, the unit load may be an essentially rectangular cuboid. The loading unit can have any suitable diameter and length. The loading unit can be portable. In some embodiments, the loading unit can have a shape, diameter, and length essentially similar to those of a conventional cigarette pack. The loading unit can have a length of between approximately 21 mm and approximately 200 mm. The loading unit can have an external diameter of between approximately 10 mm and approximately 121 mm, or between approximately 21 mm and approximately 100 mm. The loading unit may have a cavity configured to receive the aerosol generating device. The cavity may be configured to receive a distal end of the aerosol generating device. The cavity may be configured to receive the entire aerosol generating device. The cavity of the loading unit may be any size and shape suitable for receiving the aerosol generating device. The cavity of the loading unit may have a cross-section of any suitable shape. For example, the cavity may have an essentially circular, elliptical, triangular, square, rhomboidal, trapezoidal, pentagonal, hexagonal, or octagonal cross-section. In particular embodiments, the cavity of the loading unit may have a cross-section of essentially the same shape as the cross-section of the aerosol-generating device to be received in the cavity. In some particular embodiments, the cavity may have an essentially circular cross-section. The cavity of the charging unit may have an essentially constant cross-section along its length. The cavity may have an essentially circular cross-section along its length. The cavity may be essentially cylindrical in a circular manner. The cavity may be essentially axisymmetric about its longitudinal axis. The cavity of the charging unit can have any suitable diameter and any suitable length. In certain configurations, the cavity of the loading unit may have a larger diameter than the diameter of the aerosol generating device. Providing the cavity with a larger diameter than the aerosol generating device can facilitate insertion of the aerosol generating device into the cavity. The cavity of the loading unit may be elongated. The cavity may be shorter than the length of the aerosol-generating device, such that when the distal end of the aerosol-generating device is received into the cavity, the downstream or proximal end of the aerosol-generating device projects from the cavity. Alternatively, the cavity may be essentially equal to or slightly longer than the length of the aerosol-generating device, such that essentially the entire length of the aerosol-generating device is received within the cavity. Advantageously, this allows the device to be completely enclosed within the cavity and enables the loading unit to protect the device from the external environment. One of the first and second connecting parts may be arranged in the cavity of the loading unit. This arrangement may essentially protect or cover the connecting part from the external environment. The cavity may have an open end. The open end may allow the aerosol generating device to be inserted into and removed from the cavity. The cavity may also have a closed end, opposite the open end. One of the first and second connecting parts may be arranged in the closed end of the cavity of the loading unit. In certain embodiments, one of the first and second connecting parts may be arranged on an end face at the distal end of the aerosol generating device, and the other of the first and second connecting parts may be arranged on an end face at the closed end of the loading unit cavity. In these embodiments, the first and second connecting parts may be electrically connected by inserting the distal end of the aerosol generating device into the open end of the loading unit cavity and bringing the connecting part arranged on the distal end face of the device into contact with the connecting part arranged on the closed end face of the loading unit cavity. In some preferred embodiments, the cavity of the loading unit can be configured to laterally receive an aerosol-generating device. In other words, the cavity of the loading unit can have a lateral opening to receive the aerosol-generating device. In these embodiments, the cavity can be defined by two closed ends separated longitudinally and a side wall extending between the two closed ends. The side wall can define a base for the cavity. The side wall and the two closed ends can define a channel in which an aerosol-generating device can be seated. One side of the cavity can be open.One side of the cavity may be open so that an aerosol generating device can be inserted by moving the device laterally within the cavity, essentially perpendicular to the longitudinal direction. This facilitates both the insertion and removal of the aerosol generating device. Advantageously, providing an aerosol generating system with a loading unit that has a cavity configured to receive the aerosol generating device laterally with an electrical connector, as described herein, minimizes the risk of damaging the first and second connecting parts during connection and disconnection due to the lateral movement of the aerosol generating device into the cavity. When the aerosol generating device and the cavity of the loading unit are essentially circular, the aerosol generating device can be freely rotated about its longitudinal axis within the cavity. In these embodiments, the first and second connecting parts allow the device to be inserted into the cavity at any angular position relative to the cavity of the loading unit and allow the aerosol generating device to be rotated within the cavity without interrupting the electrical connection between the first and second connecting parts. The loading unit may comprise a housing. In particular embodiments, the housing may be an essentially rectangular cuboid. The housing may comprise any suitable material or combination of materials. Examples of suitable materials include metals, alloys, plastics or composite materials containing one or more of these materials, or thermoplastics suitable for food or pharmaceutical applications, for example, polypropylene, polyetheretherketone (PEEK), and polyethylene. In particular embodiments, the material is lightweight and non-brittle. When the loading unit comprises a cavity for receiving the aerosol generating device, the housing may define the cavity. The loading unit may include means for closing an open end of the cavity, such as a lid hinged to the housing. When the load unit comprises an electrical power supply, the electrical power supply may be housed within the housing. The load unit may include means for connecting the load unit to an external electrical power supply, such as a domestic power supply, to recharge the electrical power supply of the load unit. The charging unit may include electrical circuits. The electrical circuits may be configured to control the transfer of power from the charging unit to the aerosol generating device when the first and second connector parts are electrically coupled. The electrical circuits may be configured to control the transfer of data from one or more cnacnn / cznz / B / Yi of the charging unit to the aerosol generating device and from the aerosol generating device to the charging unit. The electrical circuits may include a microprocessor. The electrical circuit may include a controller, such as a microcontroller. The electrically operated aerosol generating system may further comprise a retention device for releasably retaining the electrical coupling of the first connecting part and the second connecting part when the loading unit receives the aerosol generating device. The retaining device may be any means suitable for releasably retaining the electrical coupling of the first and second connecting parts. For example, the retaining device may comprise a friction fit between the aerosol generating device and the loading unit when the loading unit receives the aerosol generating device. For example, the retaining device may comprise a closure, such as a cap, configured to detachably cover the open end or side of the loading unit cavity. For example, the retaining means may comprise resilient means arranged in the loading unit to push the first connecting part against the second connecting part when the aerosol generating device is received by the loading unit. The elastic retaining device may comprise a spring, such as a leaf spring. In some preferred embodiments, the retention device may comprise a magnetic retention device. The magnetic retention device may comprise a first magnetic element and a second magnetic element. The first magnetic element may be provided in the aerosol generating device, and the second magnetic element may be provided in the charging unit. The first and second magnetic elements can be arranged so that they are close to each other when the charging unit receives the aerosol generating device. The first and second magnetic elements can also be arranged so that they attract each other when the charging unit receives the aerosol generating device. Finally, the first and second magnetic elements can be arranged so that the first and second connecting parts are releasably held in electrical coupling when the charging unit receives the aerosol generating device. The term magnetic element is used here to describe an element comprising a magnetic material. The term 'magnetic material' is used herein to describe a material capable of interacting with a magnetic field, including both paramagnetic and ferromagnetic materials. A magnetizable material may be a paramagnetic material, such that it remains magnetized only in the presence of an external magnetic field. Alternatively, a magnetizable material may be a material that becomes magnetized in the presence of an external magnetic field and remains magnetized after the external field is removed (a ferromagnetic material, for example). The term magnetic material as used herein encompasses both types of magnetizable material, as well as a material that is already magnetized. At least one of the first and second magnetic elements may comprise a neodymium alloy, such as neodymium, iron, and boron. In other words, at least one of the first and second magnetic elements may be a neodymium magnet. At least one of the first and second magnetic elements may comprise ferromagnetic stainless steel, such as SS430 stainless steel. The first magnetic element can be positioned near the first and second connector parts of the aerosol generating device. The second magnetic element can be positioned near the other first and second connector parts of the charging unit. In this arrangement, when the first and second connector parts are not electrically connected, the magnetic retention devices can cause them to snap together into electrical coupling. Advantageously, this provides a degree of self-alignment and self-connection to the first and second connector parts, facilitating electrical coupling. Consequently, the magnetic retention device can further improve the speed and ease with which a user can electrically connect a device and a charging unit.When the first and second connector parts are electrically connected, the magnetic retention device increases the specific force required to uncouple them. Advantageously, this inhibits or essentially prevents the first and second connector parts from unintentionally disconnecting, for example, due to vibration and rotation during transport. As used in this description, the term “near” is used to describe the relative arrangement of two objects very close to each other, such as adjacent or nearby objects. Magnetic material arranged near a connecting part refers to magnetic material that is arranged on or in the connecting part or separated from the connecting part by a short distance. In this context, a short distance is a distance that is small relative to the dimensions of the aerosol generating device and the charging unit. In some embodiments, at least one of the first and second magnetic elements may form one or more of the electrical contacts of the connecting parts. For example, the third electrical contact of the first connecting part may be formed from a magnetic material. In embodiments where the magnetic material does not form one of the electrical contacts, the magnetic material may be electrically isolated from the electrical contacts of the connecting part. The first magnetic element may be arranged in or around the connector portion of the aerosol generating device. The first magnetic element may comprise a body of magnetic material disposed essentially behind the electrical contacts of the connector portion of the aerosol generating device. When the device comprises the connector portion on the distal end face, the first magnetic element may be arranged proximal to the connector portion on the device. When the aerosol generating device comprises the first connector portion, the first magnetic element may comprise at least one of the electrical contacts of the first connector portion. In particular, the third electrical contact may comprise a magnetic material, such that the third electrical contact is the first magnetic element.In modalities where the first magnetic element is not one or more of the electrical contacts, the first magnetic element can be electrically isolated from the electrical contacts of the first connecting part. The second magnetic element may be arranged in or around the connector portion of the charging unit. The second magnetic element may comprise a body of magnetic material disposed essentially behind the electrical contacts of the connector portion of the charging unit. When the charging unit comprises the second connector portion, the second magnetic element may comprise one or more bodies of magnetic material disposed between or around the electrical contacts of the second connector portion. In particular, the second magnetic element may comprise two bodies of magnetic material disposed on opposite sides of the electrical contacts of the second connector portion, such that the electrical contacts of the second connector portion are disposed between the two bodies of magnetic material.The two bodies of magnetic material can be essentially arced and can have the same or a similar curvature as the third electrical contact of the first connecting part. The first and second magnetic elements can have any suitable shape. For example, the first and second magnetic elements can be essentially circular, elliptical, or square. The first and second magnetic elements can have the same shape. The first and second magnetic elements can have different shapes. The first and second magnetic elements can be essentially annular. The first and second magnetic elements can comprise an annular body, ring, or tube of magnetic material. Providing an annular body, ring, or tube of magnetic material can be advantageous, since the annular body or tube can comprise a central passage through which electrical connectors can pass to connect one or more electrical contacts of the connector part to an electrical power supply of the device or charging unit. When the loading unit comprises a cavity and the connecting portion of the loading unit is disposed at a closed end of the cavity, the first and second magnetic materials can be arranged so that their north-south magnetic polarity is essentially aligned with the longitudinal axis of the cavity. This allows the magnetic retention device to assist in attracting the aerosol-generating device into the cavity and positioning the first and second connecting portions in electrical coupling. In some preferred embodiments, the first connecting part comprises a first magnetic element and the second connecting part comprises a second magnetic element. Preferably, at least one of the electrical contacts of the second connecting part is a spring-loaded contact that can be actuated between an extended position and a depressed position, and is constrained to return to the extended position.In these preferred embodiments, the first and second connecting parts can be placed in a first connection position, wherein: the at least one elastic contact of the second connecting part is in the extended position; the first connecting part is arranged in contact with at least one elastic contact; the first and second magnetic elements are magnetically attracted to each other, and the magnetic attraction force between the first and second magnetic elements is greater than the force required to move the at least one elastic contact from the extended position to the depressed position. The at least one elastic contact of the second connecting part allows the first and second connecting parts to maintain an electrical connection within a range of positions along the travel of the at least one elastic contact between the extended and depressed positions. The travel length of the at least one elastic contact between the extended and depressed positions can be any suitable distance. The travel length of the at least one elastic contact between the extended and depressed positions can be at least 0.1 mm, at least 0.2 mm, or at least 0.3 mm. The travel length of the at least one elastic contact between the extended and depressed positions can be between approximately 0.1 mm and approximately 1.5 mm, between approximately 0.2 mm and approximately 1 mm, or between approximately 0.3 mm and approximately 0.7 mm. cnacnn / cznz / B / Yi At least one elastic contact of the second connecting part is loaded to return to the extended position. When at least one elastic contact is pressed from the extended position to the depressed position by the first connecting part, it exerts a pushing force on the first connecting part in the direction of the extended position. The first and second magnetic elements are arranged to provide a magnetic attraction force between the first and second connecting parts that acts in the opposite direction to the polarizing force of the at least one elastic contact. When the first and second connecting parts are in the first connection position, the magnetic attraction force between the first and second magnetic elements is greater than the force required to move at least one elastic contact from the extended to the depressed position.Advantageously, this magnetic attraction force is able to overcome the polarization force of at least one elastic contact when the first and second connecting parts are in the first connection position and joins the first and second connecting parts.In other words, when the first and second connecting parts are in the first connection position, they tend to be attracted to each other by the magnetic attraction force, and at least one elastic contact of the second connecting part is pressed from the extended position to the depressed position by the first connecting part. Advantageously, as a user moves the aerosol generating device and the charging unit to electrically connect them, the magnetic attraction force between the first and second magnetic elements is such that the user does not experience resistance from the polarization force of the at least one elastic contact when the first and second connecting parts are coupled in the first connection position and when the at least one elastic contact is pressed from the extended position to the pressed position.In other words, the magnetic attraction force between the first and second magnetic elements in the first connection position is large enough to hide or mask the polarization force of at least one elastic contact of a user connecting the aerosol generating device to the electrical connection with the charging unit. When the first and second connecting parts are in the first connection position, the magnetic attraction force between the first and second magnetic elements can be of any suitable magnitude. When the first and second connecting parts are in the first connection position, the magnetic attraction force between the first and second magnetic elements can be at least 0.1 Newtons, at least 0.15 Newtons, or at least 0.2 Newtons, at least 0.5 Newtons, at least 1 Newton, or at least 1.5 Newtons. When the first and second connecting parts are in the first connection position, the magnetic attraction force between the first and second magnetic elements can be at least 0.15 Newtons. When the first and second connecting parts are in the first connection position, the magnetic attraction force between the first and second magnetic elements can be approximately 0.1 Newtons and approximately 10 Newtons, between approximately 0.5 Newtons and approximately 5 Newtons or between approximately 1.5 Newtons and approximately 4.0 Newtons. In some preferred embodiments, the first and second connecting parts can be further placed in a second connection position, wherein: at least one of the electrical contacts of the first connecting part is electrically connected to at least one of the electrical contacts of the second connecting part; the first and second magnetic elements are magnetically attracted to each other; and the at least one elastic contact of the second connector is in the depressed position. When the first and second connecting parts are placed in the second connection position, the at least one elastic contact in the recessed position exerts a pressing force on the first connecting part. In some embodiments, when the first and second connecting parts are placed in the second connection position, the magnetic attraction force between the first and second magnetic elements is greater than the polarizing force exerted by the at least one elastic contact on the first connecting part. This magnetic attraction force ensures that the pushing force of the at least one elastic contact on the second connecting part cannot push the first and second connecting parts out of the second connection position. In some preferred embodiments, when the first and second connecting parts are in the second connection position, the magnetic attraction force between the first and second magnetic elements is greater than the weight of the aerosol generating device and the polarizing force of at least one elastic contact in the first connecting part. This magnetic attraction force ensures that the first and second connecting parts can be maintained in the second connection position regardless of the system's orientation. When the first and second connector parts are not electrically connected, the magnetic attraction between the first and second magnetic elements can cause them to couple electrically. Advantageously, this provides a degree of self-alignment and self-connection to the first and second connector parts, facilitating electrical coupling. This can further improve the speed and ease with which a user can electrically connect a device and a charging unit. When the first and second connector parts are electrically connected, the magnetic attraction between the first and second magnetic elements increases the force required to uncouple them.Advantageously, this essentially inhibits or prevents the first and second connecting parts from unintentionally disconnecting, for example, through vibrations and rotation during transport. When the first and second connecting parts are in the second connection position, the magnetic attraction force between the first and second magnetic elements can be of any suitable magnitude. When the first and second connecting parts are in the second connection position, the magnetic attraction force between the first and second magnetic elements can be at least 0.5 Newtons, at least 1 Newton, at least 1.5 Newtons, at least 2 Newtons, at least 3 Newtons, or at least 4 Newtons. When the first and second connecting parts are in the second connection position, the magnetic attraction force between the first and second magnetic elements can be at least 1 Newton. When the first and second connecting parts are in the second connection position, the magnetic attraction force between the first and second magnetic elements can be approximately 0.5 Newtons and approximately 10 Newtons, between approximately 1 Newton and approximately 5 Newtons, or between approximately 1.5 Newtons and approximately 4 Newtons. When the first and second connecting parts are in the second connection position, the magnetic attraction force between the first and second magnetic elements can be between approximately 1.5 Newtons and approximately 4 Newtons. According to the description, an electrically operated aerosol generating device is also provided, comprising an electrical connector. The electrical connector comprises a face and a recess arranged essentially in the center of the face. The electrical connector further comprises: a first electrical contact arranged within the recess; a second electrical contact arranged on the face and essentially surrounding the first electrical contact; and a third electrical contact arranged on the face and essentially surrounding the second electrical contact. In some preferred embodiments, the recess has a closed end, an open end in the face, and at least one side wall extending between the open end and the closed end. Preferably, the first electrical contact is arranged in at least one side wall of the recess. There are no electrical contacts arranged in the closed end of the recess. In some embodiments, the electrically operated aerosol generating device may comprise one or more of: a cavity for receiving an aerosol-forming substrate; an electric heater for heating an aerosol-forming substrate received in the cavity; a rechargeable power supply for supplying power to the electric heater; and electrical circuitry for controlling the power supply to the electric heater from the power supply and electrically connected to the electrical connector part for the transfer of at least one power and data through the electrical connector part. The electrical connector may be arranged on one end face of the aerosol-generating device. When the device comprises a cavity for receiving an aerosol-forming substrate at one end, the electrical connector may be arranged at the opposite end. According to the description, a charging unit for charging an aerosol generating device is also provided. The charging unit comprises: a housing having a cavity for receiving an electrically operated aerosol generating device; and an electrical connector portion arranged to connect electrically to the electrically operated aerosol generating device when the device is received in the cavity. The electrical connector portion comprises: a face and a projection arranged essentially in the center of the face; a first electrical contact arranged on the projection; a second electrical contact arranged on the face, radially separated outward from the first electrical contact; and a third electrical contact arranged on the face, radially separated outward from both the first and second electrical contacts. In some preferred embodiments, the projection has an end face and at least one side wall extending between the projection face and the end face. Preferably, the first electrical contact is arranged on at least one side wall of the projection. No electrical contacts are arranged on the end face of the projection. The electrical connector portion may be arranged at a closed end of the cavity to receive an electrically operated aerosol generating device. According to the description, an electrical connector for an electrically operated aerosol generating system is also provided. The electrical connector comprises a first connecting part and a second connecting part. The first connecting part includes: a first electrical contact; a second electrical contact at least partially enclosing the first electrical contact; and a third electrical contact at least partially enclosing the first electrical contact. The second connecting part includes: a face and a projection arranged essentially at the center of the face; a first electrical contact disposed on the projection; a second electrical contact disposed on the face, radially separated outward from the first electrical contact; and a third electrical contact disposed on the face, radially separated outward from both the first and second electrical contacts. In some preferred embodiments, the projection has an end face and at least one side wall extending between the projection face and the end face. Preferably, the first electrical contact of the second connecting part is arranged on at least one side wall of the projection. No electrical contacts are arranged on the end face of the projection. When the first and second connecting parts of the electrical connector are electrically connected: the first electrical contact of the first connecting part is electrically connected to the first electrical contact of the second connecting part; the second electrical contact of the first connecting part is electrically connected to one of the second electrical contacts and the third electrical contact of the second connecting part; and the third electrical contact of the first connecting part is electrically connected to the other of the second electrical contact and the third electrical contact of the second connecting part, regardless of the rotational orientation of the second connecting part relative to the first connecting part. The invention is defined in the claims. However, a non-exhaustive list of non-limiting examples is provided below. Any or more of the features of these examples may be combined with any one or more features of another example, embodiment, or aspect described herein. EXAMPLE 1. An electrically operated aerosol generating system comprising: an aerosol generating device; a loading unit configured to receive the aerosol generating device; and a first connecting part and a second connecting part, wherein the aerosol generating device has one of the first connecting part and the second connecting part and the loading unit has the other of the first connecting part and the second connecting part, wherein: The first connecting part comprises: a first electrical contact; a second electrical contact that essentially surrounds the first electrical contact; and a third electrical contact that essentially surrounds the second electrical contact; The second connecting part comprises: a face and a projection arranged essentially in the center of the face; a first electrical contact arranged on the projection; a second electrical contact arranged on the face, radially separated outwards from the first electrical contact; and a third electrical contact arranged on the face, radially separated outwards from the first electrical contact and the second electrical contact; The first and second connecting parts are arranged so that when the aerosol generating device cnacnn / cznz / B / Yi is received by the loading unit, the first and second connecting parts are electrically connected; and the electrical contacts of the first and second connecting parts are arranged so that when the first and second connecting parts are electrically connected: the first electrical contact of the first connecting part is electrically connected to the first electrical contact of the second connecting part; The second electrical contact of the first connecting part is electrically coupled to the second electrical contact of the second connecting part; and the third electrical contact of the first connecting part is electrically coupled to the third electrical contact of the second connecting part, regardless of the angular position of the second connecting part relative to the first connecting part. EXAMPLE 2. An electrically operated aerosol generating system in accordance with EXAMPLE 1, wherein the projection is defined by an end face and at least one side wall extending between the face and the end face of the projection. EXAMPLE 3. An electrically operated aerosol generating system in accordance with EXAMPLE 2, wherein the first electrical contact of the second connecting part is arranged on at least one side wall of the projection. EXAMPLE 4. An electrically operated aerosol generating system according to EXAMPLE 2 or EXAMPLE 3, wherein there are no electrical contacts arranged on the end face of the projection of the second connecting part, more particularly there is no electrical contact arranged in the center of the end face of the projection of the second connecting part and / or more particularly the only electrical contact, or electrical contacts, arranged on the projection are arranged on at least one side wall of the projection. EXAMPLES. An electrically operated aerosol generating system in accordance with any of the foregoing examples, wherein: the first connecting part comprises a face and a recess arranged essentially in the center of the face; the projection of the second connecting part is received in the recess of the first connecting part; the first electrical contact of the first connector part is arranged inside the recess; The second electrical contact of the first connecting part is arranged on the face, the second electrical contact being radially separated from the recess by a first distance; and the third electrical contact of the second connecting part is arranged on the face, the third electrical contact being radially separated from the recess by a second distance, greater than the first distance. EXAMPLE06. An electrically operated aerosol generating system in accordance with the EXAMPLES example, wherein the recess is defined by a closed end face, an open end face, and at least one side wall extending between the open end and the closed end face. EXAMPLE 7. An electrically operated aerosol generating system in accordance with EXAMPLE 6, wherein the first electrical contact of the first connecting part is arranged in at least one side wall of the recess. EXAMPLES. An electrically operated aerosol generating system according to example EXAMPLE6 or EXAMPLE7, wherein there are no electrical contacts arranged on the closed end face of the recess, more particularly there is no electrical contact arranged in the center of the end face of the recess of the first connecting part and / or more particularly the single electrical contact, or contacts, arranged within the recess are arranged on at least one side wall of the recess. EXAMPLE 9. An electrically operated aerosol generating system according to any of the preceding examples, wherein at least one of the electrical contacts of each of the first and second connecting parts is configured to transfer data from at least one of the charging units to the aerosol generating device and from the aerosol generating device to the charging unit. EXAMPLE 10. An electrically operated aerosol generating system according to EXAMPLE 9, wherein the first electrical contact of each of the first and second connecting parts is configured to transfer data from at least one of the charging units to the aerosol generating device and from the aerosol generating device to the charging unit. EXAMPLE 11. An electrically operated aerosol generating system according to any of the preceding examples, wherein at least one of the electrical contacts of each of the first and second connecting parts is configured to transfer power from at least one of the charging units to the aerosol generating device and from the aerosol generating device to the charging unit. EXAMPLE 12. An electrically operated aerosol generating system according to EXAMPLE 11, wherein the second electrical contact of each of the first and second connecting parts is configured to transfer power from at least one of the charging units to the aerosol generating device and from the aerosol generating device to the charging unit. EXAMPLE 13. An electrically operated aerosol generating system in accordance with any of the above examples, wherein at least one of the electrical contacts of each of the first and second connecting parts is configured as a ground connection. EXAMPLE 14. An electrically operated aerosol generating system in accordance with EXAMPLE 13, wherein the third electrical contact of each of the first and second connecting parts is configured as a ground connection. EXAMPLE 15. An electrically operated aerosol generating system in accordance with any of the foregoing examples, wherein the aerosol generating device comprises a rechargeable electrical power supply. EXAMPLE 16. An electrically operated aerosol generating system in accordance with any of the foregoing examples, wherein the charging unit comprises a rechargeable electrical power supply. EXAMPLE 17. An electrically operated aerosol generating system in accordance with any of the preceding examples, wherein: The aerosol generating device comprises a rechargeable electrical power supply; the charging unit comprises a rechargeable electrical power supply; At least one of the electrical contacts of each of the first and second connector parts is configured to transfer power from the rechargeable electrical power supply of the charging unit to the power supply of the aerosol generating device; and at least one of the other electrical contacts of each of the first and second connector parts is configured to transfer data from at least one of the charging unit to the aerosol generating device and from the aerosol generating device to the charging unit. EXAMPLE 18. An electrically operated aerosol generating system according to EXAMPLE 17, wherein the first electrical contacts of the first and second connector parts are configured to transfer data from at least one of the charging units to the aerosol generating device and from the aerosol generating device to the charging unit, and the second electrical contacts of the first and second connector parts are configured to transfer power from the rechargeable electrical power supply of the charging unit to the rechargeable electrical power supply of the aerosol generating device. EXAMPLE 19. An electrically operated aerosol generating system in accordance with any of the foregoing examples, wherein the second connecting part comprises a fourth electrical contact disposed on the face. EXAMPLE 20. An electrically operated aerosol generating system in accordance with EXAMPLE 19, wherein the fourth electrical contact is configured as an insertion detection contact to detect when the first and second connected parts are electrically connected. EXAMPLE 21. An electrically operated aerosol generating system according to EXAMPLE 20, wherein one of the electrical contacts of the first connecting part is configured as a ground connection, and wherein the fourth electrical contact of the second connecting part is arranged to be electrically connected to the electrical contact of the first connecting part that is configured as a ground connection. EXAMPLE 22. An electrically operated aerosol generating system according to EXAMPLE 21, wherein the aerosol generating device or the charging unit comprises a controller configured to detect when the fourth contact is electrically connected to a ground connection, indicating that the first and second connecting parts are electrically coupled. EXAMPLE 23. An electrically operated aerosol generating system in accordance with any of the examples EXAMPLE 19 to EXAMPLE 22, wherein the fourth electrical contact of the second connecting part is radially separated from the projection by the first distance and angularly separated from the second electrical contact of the second connecting part, the fourth electrical contact of the second connecting part being arranged to electrically couple the second electrical contact of the first connecting part, and optionally the second electrical contact of the first connecting part is configured as a ground connection. EXAMPLE 24. An electrically operated aerosol generating system in accordance with any of the examples EXAMPLE 19 to EXAMPLE 22, wherein the fourth electrical contact of the second connecting part is radially separated from the projection by the second distance and angularly separated from the third electrical contact of the second connecting part, the fourth electrical contact of the second connecting part being arranged to electrically couple the third electrical contact of the first connecting part, and optionally the third electrical contact of the first connecting part is configured as a ground connection. EXAMPLE 25. An electrically operated aerosol generating system in accordance with any of the examples EXAMPLE 19 to EXAMPLE 24, wherein the fourth electrical contact of the second connecting part is a pin contact. EXAMPLE 26. An electrically operated aerosol generating system in accordance with any of the above examples, wherein one or more of the electrical contacts of the second connecting part are pin contacts. EXAMPLE 27. An electrically operated aerosol generating system in accordance with any of the above examples, wherein the first electrical contact of the second connecting part is a spring contact, and the second and third electrical contacts of the second connecting part are pin contacts. EXAMPLE 28. An electrically operated aerosol generating system in accordance with any of the foregoing examples, wherein the aerosol generating device comprises a proximal end and a distal end and the loading unit comprises a cavity configured to receive at least the distal end of the aerosol generating device, the cavity having an open end and a closed end. EXAMPLE 29. An electrically operated aerosol generating system according to EXAMPLE 28, wherein: One of the first and second connecting parts is disposed on an end face at the distal end of the aerosol generating device; and the other of the first and second connecting parts is disposed on an end face at the closed end of the loading unit cavity. EXAMPLE 30. An electrically operated aerosol generating system in accordance with EXAMPLE 28 or EXAMPLE 29, wherein the first connecting part is disposed on an end face at the distal end of the aerosol generating device; and the second connecting part is disposed on an end face at the closed end of the loading unit cavity. EXAMPLE 31. An electrically operated aerosol generating system in accordance with any of examples EXAMPLE 28 to EXAMPLE 30, wherein the cavity of the loading unit is configured to laterally receive the aerosol generating device. EXAMPLE 32. An electrically operated aerosol generating system in accordance with any of examples EXAMPLE 28 to EXAMPLE 31, wherein the cavity of the charging unit is defined by two closed ends separated in a longitudinal direction, and a side wall extending between the two closed ends, the side wall defining an opening on one side of the cavity. EXAMPLE 33. An electrically operated aerosol generating system according to EXAMPLE 32, wherein the opening on one side of the cavity is configured to receive the aerosol generating device in a direction essentially perpendicular to the longitudinal direction. EXAMPLE 34. An electrically operated aerosol generating system in accordance with any of the foregoing examples, wherein the first electrical contact of the first connecting part extends essentially in a foreground, and the second and third electrical contacts of the first connecting part extend essentially in a second plane, essentially perpendicular to the foreground. EXAMPLE 35. An electrically operated aerosol generating system in accordance with any of the foregoing examples, further comprising a retention device for releasably retaining the electrical coupling of the first connecting part and the second connecting part when the loading unit receives the aerosol generating device. EXAMPLE 36. An electrically operated aerosol generating system according to EXAMPLE 35, wherein: the retaining device comprises a first magnetic element disposed in the aerosol generating device and a second magnetic element disposed in the loading unit; and the first and second magnetic elements are arranged such that the first and second magnetic elements are close to each other when the loading unit receives the aerosol generating device, so that the retaining device releasably retains the coupling of the first and second connecting parts. EXAMPLE 37. An electrically operated aerosol generating system according to EXAMPLE 36, wherein the first magnetic element is arranged near the first and second connecting parts of the aerosol generating device and the second magnetic element is arranged near the other of the first and second connecting parts of the loading unit. EXAMPLE 38. An electrically operated aerosol generating device for an electrically operated aerosol generating system as defined in any of the examples EXAMPLE 1 to EXAMPLE 37. EXAMPLE 39. An electrically operated aerosol generating device comprising an electrical connector part, the electrical connector part comprising a face and a recess disposed essentially in the center of the face; a first electrical contact disposed within the recess; a second electrical contact disposed on the face and essentially circumscribing the first electrical contact; and a third electrical contact disposed on the face and essentially circumscribing the second electrical contact. EXAMPLE 40. An electrically operated aerosol generating device in accordance with EXAMPLE 39, wherein the recess is defined by a closed end face, an open end face, and at least one side wall extending between the open end and the closed end face. EXAMPLE 41. An electrically operated aerosol generating device according to EXAMPLE 40, wherein the first electrical contact of the connecting part is arranged in at least one side wall of the recess. EXAMPLE 42. An electrically operated aerosol generating device according to EXAMPLE 40 or EXAMPLE 41, wherein no electrical contacts are provided on the closed end face of the recess. EXAMPLE 43. An electrically operated aerosol generating device in accordance with any of examples EXAMPLE 39 to EXAMPLE 42, wherein the aerosol generating device comprises a rechargeable electrical power supply. EXAMPLE 44. An electrically operated aerosol generating device in accordance with any of examples EXAMPLE 39 to EXAMPLE 43, wherein the connecting portion is disposed on an end face of the aerosol generating device. EXAMPLE 45 An electrically operated aerosol generating device in accordance with any of examples EXAMPLE 39 to EXAMPLE 44, wherein the first electrical contact of the connecting part extends essentially in a foreground, and the second and third electrical contacts of the connecting part extend essentially in a background, essentially perpendicular to the foreground. EXAMPLE 46. An electrically operated aerosol generating device in accordance with any of examples EXAMPLE 39 to EXAMPLE 45, wherein the aerosol generating device further comprises a magnetic element near the connecting part. EXAMPLE 47. A load unit comprising an electrically operated aerosol generating system in accordance with any of the examples EXAMPLE 1 to EXAMPLE 37. EXAMPLE 48. A charging unit for charging an aerosol generating device, the charging unit comprising: a housing having a cavity for receiving an electrically operated aerosol generating device; and an electrical connecting portion arranged to be electrically connected to the electrically operated aerosol generating device when the device is received in the cavity, the electrical connecting portion comprising: a face and a projection 36 disposed essentially in the center of the face; a first electrical contact disposed on the projection; a second electrical contact disposed on the face, radially separated outwards from the first electrical contact; and a third electrical contact disposed on the face, radially separated outwards from the first electrical contact and the second electrical contact. EXAMPLE49. A unit load in accordance with example EXAMPLE48, wherein the projection is defined by an end face and at least one side wall extending between the face and the end face of the projection. EXAMPLE 50. A load unit in accordance with example EXAMPLE 49, wherein the first electrical contact of the connecting part is arranged on at least one side wall of the recess. EXAMPLES 1. A load unit in accordance with example EXAMPLE49 or EXAMPLE50, wherein no electrical contacts are arranged on the end face of the projection of the connecting part. EXAMPLE 52. A charging unit according to any of EXAMPLES EXAMPLE 49 to EXAMPLE 1, wherein the charging unit comprises a rechargeable electrical power supply. EXAMPLE 53. A charging unit according to any of EXAMPLES EXAMPLE 49 to EXAMPLE 52, wherein the connecting portion comprises a fourth electrical contact disposed on the face. EXAMPLE 54. A load unit in accordance with example EXAMPLE 53, wherein the fourth electrical contact is configured as an insertion detection contact to detect when the connecting part is electrically connected to another connecting part. EXAMPLE 55. A load unit according to example EXAMPLE 54, wherein the load unit comprises a controller configured to detect when the fourth contact is electrically connected to a ground connection, indicating that the connecting part of the load unit is electrically connected to another connecting part. EXAMPLE 56. A load unit in accordance with any of the examples EXAMPLE 53 to EXAMPLE 55, wherein the fourth electrical contact of the connecting part is radially separated from the projection by the first distance, and angularly separated from the second electrical contact. EXAMPLE 57. A load unit in accordance with any of the examples EXAMPLE 53 to EXAMPLE 55, wherein the fourth electrical contact of the connecting part is radially separated from the projection by the second distance, and angularly separated from the third electrical contact. EXAMPLE 58. A load unit in accordance with any of the examples EXAMPLE 53 to EXAMPLE 57, wherein the fourth electrical contact of the second connecting part is a 37-pin contact. EXAMPLE 59. A load unit in accordance with any of the examples EXAMPLE 53 to EXAMPLE 58, wherein one or more of the electrical contacts of the second connecting part are plug contacts. EXAMPLE 60. A load unit in accordance with any of the examples EXAMPLE 48 to EXAMPLE 59, wherein the first electrical contact of the connecting part is a leaf spring contact, and the second and third electrical contacts are pin contacts. EXAMPLE 61. A loading unit in accordance with any of the examples EXAMPLE 48 to EXAMPLE 60, the cavity of the loading unit being configured to receive at least one distal end of an aerosol generating device, the cavity having an open end and a closed end. EXAMPLE 62. A load unit in accordance with example EXAMPLE 61, wherein the connecting part is disposed on an end face at the closed end of the load unit cavity. EXAMPLE 63. An electrically operated aerosol generating system in accordance with any of examples EXAMPLE 48 to EXAMPLE 62, wherein the cavity of the loading unit is configured to laterally receive the aerosol generating device. EXAMPLE 64. An electrically operated aerosol generating system in accordance with any of examples EXAMPLE 48 to EXAMPLE 63, wherein the cavity of the charging unit is defined by two closed ends separated in a longitudinal direction, and a side wall extending between the two closed ends, the side wall defining an opening on one side of the cavity. EXAMPLE 65. An electrically operated aerosol generating system according to EXAMPLE 64, wherein the opening on one side of the cavity is configured to receive the aerosol generating device in a direction essentially perpendicular to the longitudinal direction. EXAMPLE 66. A load unit in accordance with any of the examples EXAMPLE 48 to EXAMPLE 65, wherein the load unit further comprises a magnetic element close to the connecting part. EXAMPLE 67. An electrical connector for an electrically operated aerosol generating system as defined in any of the examples EXAMPLE 1 to EXAMPLE 37. EXAMPLE 68. An electrical connector for an electrically operated aerosol generating system, cnacnn / cznz / B / YiAi, the electrical connector comprising a first connecting part and a second connecting part, the first connecting part including: a first electrical contact; a second electrical contact at least partially enclosing the first electrical contact; and a third electrical contact at least partially enclosing the first electrical contact; and the second connecting part including: a face and a projection arranged essentially in the center of the face; a first electrical contact disposed on the projection; a second electrical contact disposed on the face, radially separated outwards from the first electrical contact; and a third electrical contact disposed on the face, radially separated outwards from the first electrical contact and the second electrical contact. EXAMPLE 69.An electrical connector in accordance with example EXAMPLE68, wherein the projection is defined by an end face and at least one side wall extending between the face and the end face of the projection. EXAMPLE 70. An electrical connector in accordance with example EXAMPLE 69, wherein the first electrical contact of the second connecting part is arranged on at least one side wall of the recess. EXAMPLE 71. An electrical connector in accordance with example EXAMPLE 69 or EXAMPLE 70, wherein no electrical contacts are arranged on the end face of the projection of the second connecting part. EXAMPLE 72. An electrical connector in accordance with any of the examples EXAMPLE 68 to EXAMPLE 71, wherein: the first connecting part comprises a face and a recess arranged essentially in the center of the face; the projection of the second connecting part is received in the recess of the first connecting part; the first electrical contact of the first connector part is arranged inside the recess; The second electrical contact of the first connecting part is arranged on the face, the second electrical contact being radially separated from the recess by a first distance; and the third electrical contact of the second connecting part is arranged on the face, the third electrical contact being radially separated from the recess by a second distance, greater than the first distance. EXAMPLE 73. An electrical connector in accordance with example EXAMPLE 72, wherein the recess is defined by a closed end face, an open end face, and at least one side wall extending between the open end and the closed end face. EXAMPLE 74. An electrical connector according to EXAMPLE 73, wherein the first electrical contact of the first connecting part is arranged on at least one side wall of the recess. EXAMPLE 75. An electrical connector according to EXAMPLE 73 or 74, wherein no electrical contacts are arranged on the closed end face of the recess. EXAMPLE 76. An electrical connector in accordance with any of the examples EXAMPLE 68 to EXAMPLE 75, wherein the second connecting part comprises a fourth electrical contact disposed on the face. EXAMPLE 77. An electrical connector in accordance with example EXAMPLE 76, wherein the fourth electrical contact is configured as an insertion detection contact to detect when the first and second connector parts are electrically connected. EXAMPLE 78. An electrical connector in accordance with example EXAMPLE 76 or EXAMPLE 77, wherein the fourth electrical contact of the second connecting part is radially separated from the projection by the first distance and angularly separated from the second electrical contact of the second connecting part, the fourth electrical contact of the second connecting part is arranged to electrically couple the second electrical contact of the first connecting part. EXAMPLE 79. An electrical connector in accordance with example EXAMPLE 76 or EXAMPLE 77, wherein the fourth electrical contact of the second connecting part is radially separated from the projection by the second distance and angularly separated from the third electrical contact of the second connecting part, the fourth electrical contact of the second connecting part is arranged to electrically couple the third electrical contact of the first connecting part. EXAMPLE 80. An electrical connector in accordance with any of the examples EXAMPLE 76 to EXAMPLE 79, wherein the fourth electrical contact of the second connecting part is a plug contact. EXAMPLES 1. An electrical connector in accordance with any of the examples EXAMPLE68 to EXAMPLE80, wherein one or more of the electrical contacts of the second connecting part are pin contacts. EXAMPLE 82. An electrical connector in accordance with any of the examples EXAMPLE 68 to EXAMPLES 1, wherein the first electrical contact of the second connecting part is a spring contact, and the second and third electrical contacts of the second connecting part are pin contacts. EXAMPLE 83 An electrical connector in accordance with any of the examples EXAMPLE 68 to EXAMPLE 82, wherein the first electrical contact of the first connecting part extends essentially in a foreground, and the second and third electrical contacts of the first connecting part extend essentially in a background, essentially perpendicular to the foreground. EXAMPLE 84. An electrical connector in accordance with any of the examples EXAMPLE 68 to EXAMPLE 83, further comprising a retention device for releasably retaining the electrical coupling of the first connecting part and the second connecting part when the charging unit receives the aerosol generating device. EXAMPLE 85. An electrical connector according to EXAMPLE 84, wherein: the retention device comprises a first magnetic element provided in the first connecting part and a second magnetic element provided in the second connecting part; and the first and second magnetic elements are arranged such that the first and second magnetic elements are close to each other when the first and second connecting parts are electrically coupled, so that the retention device releasably retains the coupling of the first and second connecting parts. Now, examples will also be described with reference to the figures in which: Figure 1 shows a schematic illustration of a first connecting part of an electrical connector according to one modality of the description: Figure 2 shows a perspective view of the first connecting part of Figure 1; Figure 3 shows a schematic illustration of a second connecting part of an electrical connector according to one embodiment of the description, the second connecting part being electrically connectable to the first connecting part of Figure 1; Figure 4 shows a perspective view of the second connecting part of Figure 3; Figure 5 shows a schematic illustration of an electrically operated aerosol generating system comprising an electrical connector according to one embodiment of the description, the system comprising an aerosol generating device housed in a charging unit, the aerosol generating device including the first connecting part of Figures 1 and 2, and the charging unit comprising the second connecting part of Figures 3 and 4; Figure 6 shows a schematic illustration of an electrically operated aerosol generating system comprising an electrical connector according to one embodiment of the description, the system comprising an aerosol generating device that is received laterally in a loading unit; Figure 7 shows a schematic illustration of the electrically operated aerosol generator system of Figure 6, wherein the aerosol generating device is received in the cnacnn / cznz / B / Yi load unit and the first and second connecting parts of the electrical connector are electrically connected; Figure 8 shows a schematic illustration of a second connecting part of an electrical connector according to one embodiment of the description, the second connecting part being electrically connectable to the first connecting part of Figure 1; Figure 9 shows a side view of the second connecting part of Figure 8; Figure 10 shows a schematic illustration of an electrically operated aerosol generating system comprising an electrical connector according to one embodiment of the description, the system comprising an aerosol generating device housed in a charging unit, the aerosol generating device including the first connecting part of Figures 1 and 2, and the charging unit comprising the second connecting part of Figures 8 and 9; Figure 11 shows a perspective view of the magnetic retention structure of the second connecting part of Figures 8 and 9; Figure 12 shows a front view of one of the magnets of the magnetic holding structure of Figure 11; Figure 13 shows a side view of the electrical connector of the type shown in Figure 10 in a first connection position; and Figure 14 shows a side view of the electrical connector of the modality shown in Figure 10 in a second connection position. Figures 1 and 2 show schematic illustrations of a first connecting part 1 of an electrically operated aerosol generating system according to one embodiment of the present description. The first connecting part 1 is disposed on a distal end face of an aerosol generating device (not shown). The first connecting part 1 comprises three electrical contacts: a first electrical contact 3, a second electrical contact 4, and a third electrical contact 5. The first connecting part 1 comprises an essentially flat circular face 6 with a recess 7 located at the center of face 6. The recess 7 is essentially circularly cylindrical, having an open end on face 6, an opposite closed end with a closed end face, and a tubular side wall extending between the open end and the closed end face. The closed end face of the recess 7 is essentially circular and lies on a plane essentially parallel to the plane of face 6. The circular face 6 has a diameter of approximately 10 mm, and the recess 7 has a diameter of approximately 4 mm and a depth of approximately 4 mm. The first electrical contact 3 is arranged within the recess 7. The first electrical contact 3 is arranged on the side wall of the recess 7. The first electrical contact 3 is essentially tubular and extends essentially over the tubular side wall of the recess 7. The first electrical contact 3 has a thickness of approximately 0.1 mm, so that the placement of the first electrical contact 3 in the recess 7 does not significantly reduce the diameter of the recess 7. The first electrical contact 3 has a width of approximately 3.8 mm and is positioned in the recess 7 such that the first electrical contact 3 does not extend to the closed end face of the recess 7 or beyond the open end of the recess 7. There is no electrical contact arranged on the closed end face of the recess 7. The second and third electrical contacts 4, 5 are arranged on the flat face 6. The second electrical contact 4 is annular and extends over the flat face 6.The second electrical contact 4 encloses both the recess 7 and the first electrical contact 3. The second electrical contact 4 has an outer diameter of approximately 6 mm and an inner diameter of approximately 4.6 mm, so that the second electrical contact 4 does not overlap the recess 7 nor come into contact with the first electrical contact 3. The third electrical contact 5 is annular and extends over the flat face 6. The third electrical contact encloses the second electrical contact 4, the recess 7, and the first electrical contact 3. The third electrical contact 5 has an outer diameter of approximately 8 mm and an inner diameter of approximately 6.6 mm, so that the third electrical contact 5 does not come into contact with the second electrical contact 4. In this arrangement, the first, second, and third electrical contacts 3, 4, and 5 are all electrically isolated from each other. The first, second, and third electrical contacts 3, 4, 5 do not all extend in the same plane. The second and third electrical contacts 4, 5 extend in the same plane, on the flat face 6, and the first electrical contact 3 extends on a surface that is essentially perpendicular to the plane of the second and third electrical contacts 4, 5, the side wall of the recess 7. In this configuration, the first, second and third electrical contacts 4, 5 are made of SS430 stainless steel. One advantage of the arrangement of electrical contacts 3, 4, and 5 of the first connecting part 1 is that the electrical contacts have circular rotational symmetry about an axis passing through the center of the recess 7 and the first electrical contact 3. This symmetry allows the first connecting part 1 to be connected to a second connecting part in any rotational orientation about the axis, and presents the second connecting part with an identical contact arrangement. Therefore, the first connecting part 1 can be connected to a second connecting part in any orientation of the first connecting part 1 with respect to the second connector. Figures 3 and 4 show schematic illustrations of a second connecting part 21 of the electrically operated aerosol generator system 43 according to one embodiment of the description. The second connecting part 21 can be electrically connected to the first connecting part 21 of Figures 1 and 2. The second connecting part 21 is disposed on a closed end face of a cavity of a loading unit (not shown). The second connecting part 21 comprises three electrical contacts: a first electrical contact 23, a second electrical contact 24, and a third electrical contact 25. The second connecting part 21 comprises an essentially circular flat face 26, which is essentially the same size as face 6 of the first connecting part 1. The second connecting part 21 comprises a projection 27 located at the center of the circular flat face 26. The projection 27 extends outward from face 26 in a direction essentially perpendicular to the plane of face 26. The projection 27 is an essentially circular cylinder and comprises an end face and a tubular side wall extending between face 26 and the open end face of the projection 27. The end face of the projection 27 is essentially circular and lies on a plane essentially parallel to the plane of face 26. The projection 27 has essentially the same shape as the recess 7 of the first connecting part 1, with a height of approximately 3 mm and a maximum diameter of approximately 3.3 mm.The maximum diameter of projection 27 is slightly smaller than the diameter of recess 7, so that projection 27 of the second connecting part 21 can fit snugly inside recess 7 of the first connecting part 1. The diameter or width of projection 27 is reduced towards the end face of projection 27, so that the interface between the end face and the side wall of projection 27 is beveled to facilitate locating projection 27 within recess 7 of the first connecting part 1. The first electrical contact 23 is arranged on the projection 27. The first electrical contact 23 is a leaf spring arranged on the side wall of the projection 27. The first electrical contact 23 extends radially outward from the side wall of the projection 27, in a direction essentially perpendicular to the side wall and essentially parallel to the plane 26, for a maximum distance of approximately 0.3 mm. There is no electrical contact arranged on the end face of the projection 27. The second and third electrical contacts 24, 25 are spring-pin contacts, or pogo-pin contacts, arranged on the flat face 26. The second and third electrical contacts 24, 25 extend outward from the flat face 26, essentially in the same direction as the projection.The second and third electrical contacts 24, 25 are spaced radially outward from the projection 27 in opposite directions, so that the second and third electrical contacts 24, 25 are essentially arranged in a line. The second electrical contact 24 is separated from the side wall of the projection 27 by a distance of approximately 1.3 mm measured from the center axis of the contact. The third electrical contact 25 is separated from the side wall of the projection 27 by a greater distance than the separation of the second electrical contact 24 from the side wall of the projection 27. The third electrical contact 25 is separated from the side wall of the projection 27 by a distance of approximately 3.3 mm measured from the center axis of the contact. In this configuration, the crossbow contact 23 is made of SS301 stainless steel, and the pogo pin contacts 24, 25 are made of brass. The pogo pin contacts 24, 25 extend approximately 1 mm above the flat face 26 of the second connector part 21 when uncompressed, and extend approximately 0.5 mm above the flat face 26 when fully compressed. The first connector part 1 and the second connector part 21 can be electrically connected by inserting the distal end of the aerosol generating device into the cavity of the loading unit. The aerosol generating device is essentially circular, and the cavity of the loading unit is also essentially circular, with a diameter slightly larger than that of the aerosol generating device. Inserting the distal end of the aerosol generating device into the cavity essentially aligns face 6 of the first connector part 1 and face 26 of the second connector part 21. Aligning faces 6 and 26 also aligns the first electrical contacts 3 and 23 of the first and second connector parts 1 and 21, the second electrical contacts 4 and 24 of the first and second connector parts 1 and 21, and the third electrical contacts 5 and 25 of the first and second connector parts 1 and 21.Consequently, when the first connecting part 1 makes contact with the second connecting part 21, the first electrical contacts 3, 23 make contact and are electrically connected, the second electrical contacts 4, 24 make contact and are electrically connected, and the third electrical contacts 5, 25 make contact and are electrically connected. The distal end of the aerosol generating device can be inserted into the cavity of the charging unit at any angular position, and the aerosol generating device can be freely rotated within the cavity without affecting the electrical connection of the first and second connecting parts. Advantageously, the first and second connecting parts 1,21 provide a robust means of electrical connection, which can be connected and disconnected a large number of times without damaging the electrical contacts of either connecting part. In particular, this is because no electrical contact is provided on the end face of the projection 27 of the second connecting part 21. The projection 27 of the second connecting part 21 is the feature of the connecting parts that extends furthest from the faces 6, 26 of the connecting parts and, as such, the end face of the projection 27 is the feature on either connecting part 1,21 most likely to first come into contact with the opposite connecting part during the electrical connection of the first and second parts 1, 21.As such, the end face of projection 27 of the second connector part 21 is the most likely feature to be damaged during normal use. Unwanted contact between the end face of projection 27 of the second connector part 21 and the first connector part 1 can occur during the connection of connector parts 1 and 21 due to misalignment of the first and second connector parts 1 and 21. Such unwanted contact can cause damage to the end face of projection 27. By not placing an electrical contact on the end face of projection 27 of the second connector part 21, the second connector part 21 becomes more resistant to damage during normal use. The aerosol generating device comprises a rechargeable electrical power supply (not shown), and the charging unit also comprises a rechargeable electrical power supply (not shown). The first electrical contacts 3, 23 are configured to transmit data between the aerosol generating device and the charging unit. The second electrical contacts 4, 24 are configured to transfer power from the rechargeable electrical power supply of the charging unit to the rechargeable electrical power supply of the aerosol generating device. The third electrical contacts 5, 25 are configured as ground connections. It will be appreciated that the second connector part can be provided with any suitable number of first, second, and third electrical contacts. For example, the second connector part can be provided with three second electrical contacts and two third electrical contacts. It will also be appreciated that additional electrical contacts can be provided on both the first and second connector parts. For example, an insertion detection electrical contact can be provided on the second connector part to determine when an aerosol-generating device is received in the loading unit cavity and electrically connected to the loading unit via the second electrical connector part. The first and second connecting parts 1, 21 comprise a magnetic retention device. The magnetic retention device comprises a first magnetic material in the form of a third electrical contact 5 of the first connecting part 1, comprising a ring or band of a ferromagnetic metal. The magnetic retention device further comprises a second magnetic material comprising a pair of arcuate bodies 33, 35 of a ferromagnetic material cnacnn / cznz / B / Yi arranged on opposite sides of the electrical contacts 23, 24, 25 of the second connecting part 21. The second magnetic material is electrically insulated from the electrical contacts of the second connecting part 21. In this modality, the third electrical contact 5 of the first connecting part 1 (i.e., the first magnetic material) is formed from a ferromagnetic stainless steel, such as SS430 stainless steel, and the second magnetic material is formed from a neodymium, iron, and boron alloy that is magnetized to form a permanent magnet. When the first connector part 1 approaches the first connector part 21, the magnetic attraction between the first and second magnetic materials brings the first and second connector parts together, compressing contacts 24 and 25 of the pogo pin of the second connector part 21, and causing the electrical contacts of each connector part to couple. The magnetic retention device helps to keep the first and second connector parts electrically coupled. It will be noted that, in other embodiments, the first and second magnetic materials can be formed from alternative materials and can be arranged in different positions. For example, the first magnetic material can be arranged behind the electrical contacts of the first connecting part 1, forming a ring of ferromagnetic material that circumscribes the recess 7, below the third electrical contact 5. It will also be noted that, in other embodiments, the first magnetic material may comprise a magnetized material and the second magnetic material may comprise a non-magnetized magnetic material. In other embodiments, both the first and second magnetic materials may comprise magnetized magnetic materials. Figure 5 shows the first and second connecting part 1,21 in position in an aerosol generating system 100 according to one modality of the description. The aerosol generating system 100 comprises an aerosol generating device 101 having a first connecting part 1 arranged on a distal end face. The aerosol generating system 100 further comprises a charging unit 103 comprising a cavity 104 for receiving the distal end of the aerosol generating device 101. The cavity 104 comprises a second connecting part 21 on a closed end face. The charging unit 103 further comprises a battery 105 and electrical circuits 106 housed in a housing. The housing defines the circularly cylindrical cavity 104. The first connecting part 1 and the second connecting part 21 can be electrically coupled by inserting the distal end of the aerosol generating device 101 into the cavity 104 of the charging unit 103.The aerosol generating device 101 is circularly cylindrical, and the cavity 104 of the loading unit 103 is also circularly cylindrical, with a diameter larger than the diameter of the aerosol generating device 101. Inserting the distal end of the aerosol generating device 101 into the cavity 104 essentially aligns face 6 of the first connecting part 1 with face 26 of the second connecting part 21. Aligning faces 6 and 26 of the first and second connecting parts 1, 21 also aligns the gap 7 and projection 27, the first electrical contacts 3, 23, the second electrical contacts 4, 24, and the third electrical contacts 5, 25 of the first and second connecting parts 1, 21, respectively.Consequently, when the first connecting part 1 comes into contact with the second connecting part 21, the projection 27 is received in the recess 7, the first electrical contacts 3, 23 are electrically connected, the second electrical contacts 4, 24 are electrically connected, and the third electrical contacts 5, 25 are electrically connected. In one example, as shown in Figure 5, the cavity 104 of the loading unit 103 is formed by at least one side wall extending longitudinally. The side wall may have a closed end and an open end so that the aerosol generating device can be inserted into the cavity 104 by moving the aerosol generating device longitudinally. The first or second connecting part may be arranged at the closed end. In Figure 5, the second connecting part 21 is arranged at the closed end. The cavity 104 may be tubular. In particular, the cavity 104 may have a circular cross-section, a square cross-section, or any other shaped cross-section. Preferably, the cavity has a cross-section that is complementary to the cross-section of the aerosol generating device. In another example, as shown in Figures 6 and 7, the cavity 104 of the loading unit 103 is formed by two closed ends separated longitudinally. A side wall defines the base of the cavity 104. The side wall and the closed ends thus define a channel in which the aerosol generating device 101 can be seated. One side of the cavity 104 is open so that the aerosol generating device 101 can be positioned in the cavity by moving it sideways or laterally within the cavity 104. A cover (not shown), such as a flexible flap, may be provided on the loading unit 103 so that the open side of the cavity 104 can be covered, thereby retaining the aerosol generating device 101 in place within the cavity 104.In some embodiments, the system 100 may be provided with additional or alternative retention devices to retain the aerosol generating device 101 in the cavity 104 of the loading unit 103, such as a magnetic retention device as described below, with reference to Figures 11 and 12. It will be noted that in the first example of cavity 104 of the loading unit 103, as shown in Figure 5, the aerosol generating device 101 is mounted longitudinally in cavity 104, whereas in the second example of cavity 104, as shown in Figures 6 and 7, the aerosol generating device 101 is mounted at least partially sideways or laterally in cavity 104. The connector described here is particularly suitable for side mounting because the contacts are protected against lateral collisions. Side mounting can be achieved by moving the aerosol generating device 101 within the loading unit 103 at an angle, as shown in Figure 6, so that the connecting part 1 of the aerosol generating device first enters cavity 104 and the protrusion of the second connecting part 1 enters the recess of the first connecting part 21.Then, the aerosol generating device 101 can be pushed into the cavity 104 by rotating it towards the loading unit so that the end of the device opposite the connecting part 1 enters the cavity 104, and the first and second connecting parts 1,21 are electrically engaged. Figures 8 and 9 show schematic illustrations of a second connecting part 21 of the electrically operated aerosol generating system according to another embodiment of the description. The second connecting part 21 can be electrically connected to the first connecting part 21 of Figures 1 and 2. The second connecting part 21 is disposed on a closed end face of a cavity of a loading unit (not shown). The second connecting part 21 comprises four electrical contacts: a first electrical contact 23, a second electrical contact 24, a third electrical contact 25, and a fourth electrical contact 28. The second connecting part 21 comprises an essentially circular flat face 26, which is essentially the same size as face 6 of the first connecting part 1. The second connecting part 21 comprises a projection 27 located at the center of the circular flat face 26. The projection 27 extends outward from face 26 in a direction essentially perpendicular to the plane of face 26. The projection 27 is an essentially circular cylinder and comprises an end face and a tubular side wall extending between face 26 and the open end face of the projection 27. The end face of the projection 27 is essentially circular and lies on a plane essentially parallel to the plane of face 26. The projection 27 has essentially the same shape as the recess 7 of the first connecting part 1, with a height of approximately 3 mm and a maximum diameter of approximately 3.3 mm.The maximum diameter of projection 27 is slightly smaller than the diameter of recess 7, so that projection 27 of the second connector part 21 can fit snugly inside recess 7 of the first connector part 1. The diameter or width of projection 27 is reduced towards the end face of projection 27, so that the interface between the end face and the side wall of projection 27 is rounded to make it easier to position projection 27 inside recess 7 of the first connector part 1. The first electrical contact 23 is arranged on the projection 27. The first electrical contact 23 is a leaf spring arranged on the side wall of the projection 27. The first electrical contact 23 extends radially outward from the side wall of the projection 27, in a direction essentially perpendicular to the side wall and essentially parallel to the plane 26, for a maximum distance of approximately 0.3 mm. There is no electrical contact arranged on the end face of the projection 27. The second, third, and fourth electrical contacts 24, 25, and 28 are spring-pin contacts, or pogo-pin contacts, arranged on the flat face 26. The second, third, and fourth electrical contacts 24, 25, and 28 extend outward from the flat face 26, essentially in the same direction as the projection.The second and third electrical contacts 24, 25 are spaced radially outward from the projection 27 in opposite directions, so that the second and third electrical contacts 24, 25 are arranged essentially in a line. The second electrical contact 24 is separated from the side wall of the projection 27 by a distance of approximately 1.3 mm measured from the center axis of the contact. The third electrical contact 25 is separated from the side wall of the projection 27 by a greater distance than the separation of the second electrical contact 24 from the side wall of the projection 27. The third electrical contact 25 is separated from the side wall of the projection 27 by a distance of approximately 3.3 mm measured from the center axis of the contact. The fourth electrical contact 28 is separated from the side wall of the projection 27 by the same distance as the third electrical contact 25, a distance of approximately 3 mm.3 mm measured from the central axis of the contact. The fourth electrical contact 28 is arranged on the opposite side of face 26 from the third electrical contact 25, offset from the second electrical contact 24, so that the fourth electrical contact 28 is not aligned with the second and third electrical contacts 24, 25. In this configuration, the crossbow contact 23 is made of SS301 stainless steel, and the pogo pin contacts 24, 25, 28 are made of brass. The pogo pin contacts 24, 25, and 28 extend approximately 1 mm above the flat face 26 of the second connector part 21 when uncompressed, and approximately 0.5 mm above the flat face 26 when fully compressed. The first connector part 1 and the second connector part 21 can be electrically connected 50 by inserting the distal end of the aerosol generating device into the cavity of the charging unit. The aerosol generating device is essentially circular, and the cavity of the charging unit is also essentially circular, with a diameter slightly larger than that of the aerosol generating device. Inserting the distal end of the aerosol generating device into the cavity essentially aligns face 6 of the first connector part 1 with face 26 of the second connector part 21.Aligning faces 6 and 26 also aligns the first electrical contacts 3, 23 of the first and second connector parts 1, 21, aligns the second electrical contacts 4, 24 of the first and second connector parts 1, 21, and aligns the third electrical contacts 5, 25 of the first and second connector parts 1, 21. Consequently, when the first connector part 1 makes contact with the second connector part 21, the first electrical contacts 3, 23 make contact and are electrically connected, the second electrical contacts 4, 24 make contact and are electrically connected, and the third electrical contacts 5, 25 make contact and are electrically connected. The distal end of the aerosol generating device can be inserted into the cavity of the charging unit at any angular position, and the aerosol generating device can be freely rotated within the cavity without affecting the electrical connection of the first and second connector parts.When the first connector part 1 makes contact with the second connector part 21, the fourth electrical contact 28 of the second connector part 21 makes contact with the third electrical contact 5 of the first connector part. A flexible circuit 37 connects the electrical contacts 23, 24, 25, 28 of the second connector part 21 to a controller (not shown) of the charging unit. Figure 10 shows the first connecting part 1 of Figures 1 and 2, and the second connecting part 21 of Figures 8 and 9 in position in an aerosol generating system 100 according to one embodiment of the description. The aerosol generating system 100 comprises an aerosol generating device 101 having the first connecting part 1 of Figures 1 and 2 arranged on a distal end face. The aerosol generating system 100 further comprises a charging unit 103 comprising a cavity 104 for receiving the distal end of the aerosol generating device 101. The cavity 104 comprises the second connecting part 21 of Figures 8 and 9 on a closed end face. The charging unit 103 further comprises a battery and an electrical circuit housed in a housing. The housing defines the circular cylindrical cavity 104. The flexible circuit 37 of the second connecting part 21 connects the electrical contacts 23, 24, 25, and 28 of the second connecting part 21 to a controller of the charging unit 103. The first connector part 1 and the second connector part 21 can be electrically connected by inserting the distal end of the aerosol generating device 101 into the cavity 104 of the charging unit 103. The aerosol generating device 101 is circularly cylindrical, and the cavity 104 of the charging unit 103 is also circularly cylindrical, with a diameter larger than that of the aerosol generating device 101. Inserting the distal end of the aerosol generating device 101 into the cavity 104 essentially aligns face 6 of the first connector part 1 with face 26 of the second connector part 21. Aligning faces 6 and 26 of the first and second connector parts 1, 21 also aligns recess 7 and projection 27, the first electrical contacts 3, 23, the second electrical contacts 4, 24, and the third electrical contacts 5, 25 of the first and second connector parts 1, 21, respectively.Consequently, when the first connecting part 1 comes into contact with the second connecting part 21, the projection 27 is received in the recess 7, the first electrical contacts 3, 23 are electrically connected, the second electrical contacts 4, 24 are electrically connected, and the third electrical contacts 5, 25 are electrically connected. In this configuration, the first electrical contacts 3 and 23 are configured for data transfer between the charging unit 103 and the aerosol generating device 101. The second electrical contacts 4 and 24 are configured for power transfer between the charging unit 103 and the aerosol generating device 101. The third electrical contacts 5 and 25 are configured as ground connections. The fourth electrical contact 28 of the second connector part 21 is configured as an insertion detection pin to detect when the first connector part 1 is electrically connected to the second connector part 21. The fourth electrical contact 28 is in communication with a dome switch (not shown), which closes when contact 28 of the pogo pin is compressed.The dome switch is connected to the load unit controller, which is configured to determine that the first connector part 1 is electrically connected to the second connector part 21 when the dome switch is closed. A magnetic retention device releasably retains the electrical coupling between the first and second connecting part 1,21 of the aerosol generating system of Figure 10 when an aerosol generating device 101 of the system is received in a cavity 104 of a loading unit 103 of the system. The magnetic retention device comprises a first magnetic element at the distal end of the aerosol generating device 101 and a second magnetic element 32 at a closed end of the cavity 104 of the loading unit. The first magnetic element at the distal end of the aerosol generating device is the third electrical contact 5 of the first connecting part 1, comprising a ring of ferromagnetic material. The second magnetic element 32 comprises two arcuate permanent magnets 33, 35, as shown in detail in Figures 11 and 12. The two permanent magnets 33, 35 are arcuate and have the same curvature as the third electrical contact 3 of the first connecting part 1. The permanent magnets 33 and 35 are arranged on opposite sides of the second connecting part 21 and are electrically insulated from it. The permanent magnets 33, 35 are arranged around, and generally circumscribe, a cylindrical passage 38 on opposite sides. The cylindrical passage 38 circumscribes the projection 27 of the second connecting part 21. As shown in Figures 9 and 10, the permanent magnets 33, 35 extend above face 26 of the second connecting part 21. An arched upper surface of the permanent magnets 33, 35 is positioned just below the top of the second, third, and fourth pogo pin contacts 24, 25, 28 when the pogo pin contacts are in their compressed position. In this arrangement, the third electrical contact 5 of the first connecting part 1, which is the first magnetic element of the magnetic retention device, is positioned adjacent to the second magnetic element 32, comprising the permanent magnets 33, 35 of the second connecting part 21, when the device 101 is arranged in cavity 104 and the first connecting part 1 is in contact with the second connecting part 21. Each permanent magnet 33, 35 has a single magnetic north pole on either the top or bottom side, and a single magnetic south pole on the opposite side of the top and bottom sides. As shown in Figure 12 for permanent magnet 33, when each magnet is viewed from the front, looking at the drops of opposite ends of the arcuate magnet, both faces of the magnet ends have a north-south magnetic polarity oriented in the same direction. The north-south magnetic polarities of the permanent magnets 33 and 35 are oriented in opposite directions, as illustrated in Figure 12 with the letters N and S. The magnetic north pole of magnet 33 and the magnetic south pole of magnet 35 are arranged to extend from the surface of the second connecting part 21, in the direction of the central passage 38 through the magnets. In this arrangement, the magnetic north pole of magnet 33 and the magnetic south pole of magnet 35 are adjacent to the third electrical contact 5 of the first connecting part 1 when the device 101 is arranged in the cavity 104, and the first and second connecting parts 1 and 21 are coupled. In this arrangement, the permanent magnet 33, the third electrical contact 5 of the first connecting part 1, and the permanent magnet 35 form a magnetic circuit. cnacnn / cznz / B / Yi The magnetic attraction between the first magnetic element and the second magnetic element 32 attracts the aerosol generating device along the longitudinal axis of the cavity 104 towards the second connecting part 21 and the second magnetic element 32 at the closed end of the cavity 104. This action facilitates the electrical connection of the first and second connecting parts 1,21, as described above. Figure 13 shows the first connector part 1 and the second connector part 21 in the first connection position. In this position, the first and second connector parts 1 and 21 are electrically coupled. Specifically, the first electrical contacts of the connector part are coupled, the second electrical contacts of the connector parts are coupled, and the third electrical contacts of the connector parts are coupled. In this position, the second, third, and fourth electrical contacts of the second connector part, all of which are spring-loaded pin contacts, are in their extended position.In the first connection position, the magnetic attraction force between the first magnetic element and the second magnetic element 32 is greater than the force required to press the second, third, and fourth spring pin contacts of the second connector part, and the frictional force between the device and the charging unit. Therefore, the first and second connector parts 1,21 are brought together by the magnetic attraction force. A user moving the device into the charging unit cavity, through the first connection position, will not experience additional resistance when the first connector part rests on the spring pin contacts, because the magnetic attraction force between the first and second magnetic elements effectively masks the polarizing force exerted on the device by the spring pin contacts.In this mode, the first magnetic element and the second magnetic element are separated by approximately 0.5 millimeters when the first and second connector parts 1,21 are in the first connection position. Figure 14 shows the first connecting part 1 and the second connecting part 21 in a second connection position. In the second connection position, the first and second connecting parts 1 and 21 are also electrically coupled. In the second connection position, the second, third, and fourth elastic pin contacts are in their recessed position. In the second connection position, the magnetic attraction force between the first magnetic element and the second magnetic element 32 is greater than the combination of the polarizing force exerted on the first connecting part 1 by the elastic contacts of the second connecting part 21 and the weight of the aerosol generating device, such that the charging unit and the device can be inverted and the aerosol generating device 54 would be held in the second connection position by the magnetic attraction force.In this configuration, a small gap is provided between the first and second magnetic elements in the second connection position. It will be noted that, in other configurations, the first and second magnetic elements may be in direct contact in the second connection position. It will be appreciated that the features described in relation to one embodiment of the description may apply to other embodiments of the description. For example, the features described in relation to embodiments of an aerosol generating system comprising an aerosol generating device, a charging unit, and an electrical connector may also apply to embodiments of an aerosol generating device, embodiments of a charging unit, and embodiments of an electrical connector. For the purposes of this description and the appended claims, unless otherwise stated, all numbers expressing quantities, amounts, percentages, and the like shall be understood to be modified in all cases by the term "approximately." Furthermore, all intervals include the maximum and minimum points described and include any intermediate intervals therewith, which may or may not be specifically enumerated herein. In this context, therefore, a number A is understood to be A ± {5%} of A. Within this context, a number A may be considered to include numerical values ​​that are within the general standard error of the measurement of the property that the number A modifies.The number A, in some cases as used in the appended claims, may deviate by the percentages listed above, provided that the amount by which A deviates does not materially affect the basic and novel feature(s) of the claimed invention. Furthermore, all intervals include the maximum and minimum points described and include any intermediate intervals therein, which may or may not be specifically listed herein.

Claims

1. An electrically operated aerosol generating system comprising: an aerosol generating device; a charging unit configured to receive the aerosol generating device; and a first connecting part and a second connecting part, wherein the aerosol generating device has one of the first connecting part and the second connecting part and the charging unit has the other of the first connecting part and the second connecting part, wherein: the first connecting part comprises: a first electrical contact; a second electrical contact essentially circumscribing the first electrical contact; and a third electrical contact essentially circumscribing the second electrical contact; the second connecting part comprises: a face and a projection disposed essentially at the center of the face, the projection being defined by an end face, and at least one side wall extending between the face and the end face of the projection;a first electrical contact disposed on the projection on at least one side wall of the projection; a second electrical contact disposed on the face, radially separated outwards from the first electrical contact; and a third electrical contact disposed on the face, radially separated outwards from the first electrical contact and the second electrical contact; there are no electrical contacts disposed on the end face of the projection of the second connecting part; the first and second connecting parts are arranged so that when the aerosol generating device is received by the charging unit the first and second connecting parts are electrically connected;and the electrical contacts of the first and second connecting parts are arranged so that when the first and second connecting parts are electrically connected: the first electrical contact of the first connecting part is electrically connected to the first electrical contact of the second connecting part; the second electrical contact of the first connecting part is electrically coupled to the second electrical contact of the second connecting part; and the third electrical contact of the first connecting part is electrically coupled to the third electrical contact of the second connecting part, regardless of the angular position of the second connecting part relative to the first connecting part.

2. An electrically operated aerosol generating system according to claim 1, wherein: the first connecting part comprises a face and a recess disposed essentially in the center of the face; the projection of the second connecting part is received in the recess of the first connecting part; the first electrical contact of the first connecting part is disposed within the recess; the second electrical contact of the first connecting part is disposed on the face, the second electrical contact being radially separated from the recess by a first distance; and the third electrical contact of the first connecting part is disposed on the face, the third electrical contact being radially separated from the recess by a second distance, greater than the first distance.

3. An electrically operated aerosol generating system according to claim 2, wherein the recess is defined by a closed end face, an open end face, and at least one side wall extending between the open end and the closed end face.

4. An electrically operated aerosol generating system according to claim 3, wherein the first electrical contact of the first connecting part is arranged in at least one side wall of the recess.

5. An electrically operated aerosol generating system according to claim 3 or 4, wherein no electrical contacts are arranged on the closed end face of the recess.

6. An electrically operated aerosol generating system according to any of the preceding claims, wherein the aerosol generating device comprises a rechargeable electrical power supply; and the charging unit comprises a rechargeable electrical power supply.

7. An electrically operated aerosol generating system according to claim 6, wherein at least one of the electrical contacts of each of the first and second connecting parts is configured to transfer power from the rechargeable electrical power supply of the charging unit to the rechargeable electrical power supply of the aerosol generating device and at least one of the other electrical contacts of each of the first and second connecting parts is configured to transfer data from at least one of the charging units to the aerosol generating device and the aerosol generating device to the charging unit.

8. An electrically operated aerosol generating system according to claim 7, wherein the first electrical contacts of the first and second connecting parts are configured to transfer data from at least one of the charging units to the aerosol generating device and from the aerosol generating device to the charging unit, and the second electrical contacts of the first and second connecting parts are configured to transfer power from the rechargeable electrical power supply of the charging unit to the rechargeable electrical power supply of the aerosol generating device.

9. An electrically operated aerosol generating system according to any preceding claim, wherein the second connecting part comprises a fourth electrical contact disposed on the face, the fourth electrical contact being radially separated from the projection by the second distance and angularly separated from the third electrical contact of the second connecting part, wherein the fourth electrical contact is configured as an insertion detection contact, for detecting when the first and second connecting parts are electrically connected.

10. An electrically operated aerosol generating device comprising an electrical connector part, the electrical connector part comprising a face and a recess disposed essentially in the center of the face, the recess being defined by an end face and at least one side wall extending between the face and the end face of the recess; a first electrical contact disposed within the recess in at least one side wall of the recess; a second electrical contact disposed on the face and essentially circumscribing the first electrical contact; and a third electrical contact disposed on the face and essentially circumscribing the second electrical contact, wherein there are no electrical contacts disposed on the end face of the recess.

11. A charging unit for charging an aerosol generating device, the charging unit comprising: a housing having a cavity for receiving an electrically operated aerosol generating device; and an electrical connector portion arranged to be electrically connected to the electrically operated aerosol generating device when the device is received in the cavity, the electrical connector portion comprising: a face and a projection disposed essentially in the center of the face, the projection being defined by an end face, and at least one side wall extending between the face and the end face of the projection; a first electrical contact disposed in the projection on at least one side wall of the projection; a second electrical contact disposed in the face, radially separated outwards from the first electrical contact;and a third electrical contact arranged on the face, radially separated outwards from the first electrical contact and the second electrical contact, wherein there are no electrical contacts arranged on the end face of the projection.; 12. An electrical connector for an electrically operated aerosol generating system, the electrical connector comprising a first connecting part and a second connecting part, the first connecting part including: a first electrical contact; a second electrical contact at least partially enclosing the first electrical contact; and a third electrical contact at least partially enclosing the first electrical contact; and the second connecting part including: a face and a projection disposed essentially at the center of the face, the projection being defined by an end face, and at least one side wall extending between the face and the end face of the projection; a first electrical contact disposed on the projection in at least one side wall of the projection; a second electrical contact disposed on the face, radially separated outwards from the first electrical contact;and a third electrical contact arranged on the face, radially separated outwards from the first electrical contact and the second electrical contact, wherein there are no electrical contacts arranged on the end face of the projection of the second connecting part.; 13. An electrical connector according to claim 12, wherein: the first connecting part comprises a face and a recess disposed essentially in the center of the face; the projection of the second connecting part is received in the recess of the first connecting part; the first electrical contact of the first connecting part is disposed within the recess; the second electrical contact of the first connecting part is disposed on the face, the second electrical contact being radially separated from the recess by a first distance; and the third electrical contact of the first connecting part is disposed on the face, the third electrical contact being radially separated from the recess by a second distance, greater than the first distance.

14. An electrical connector according to claim 13, wherein: the recess of the first connecting part is defined by a closed end face, an open end face, and at least one side wall extending between the open end and the closed end face; the first electrical contact of the first connecting part is arranged on at least one side wall of the recess; and there are no electrical contacts arranged on the closed end face of the recess of the first connecting part.

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