Aerosol generating device with removable housing portion

Abstract

An aerosol generating device (10, 210) is provided comprising a housing (12, 212) comprising a first housing portion (14, 214) and a second housing portion (16, 216). The first housing portion (14, 214) defines a chamber (32) for receiving an aerosol-forming substrate. The second housing portion (16, 216) is configured for removable attachment to the first housing portion (14, 214). The aerosol generating device (10, 210) also comprises an electric heater (22) positioned within the first housing portion (14, 214). The aerosol generating device (10, 210) also comprises a power source (20) positioned within the second housing portion (16, 216). The aerosol generating device (10, 210) also includes a controller (18) positioned within the first housing portion (14, 214), the controller (18) being configured to control the supply of power from the power source (20) to the electric heater (22) when the second housing portion (16, 216) is attached to the first housing portion (14, 214).

Description

[Technical field]

[0001] The present invention relates to an aerosol generating device comprising a first housing portion and a second housing portion, the second housing portion configured for removable attachment to the first housing portion. BACKGROUND OF THEINVENTION

[0002] One type of aerosol generating system is an electrically operated smoking system. Known handheld electrically operated smoking systems generally include an aerosol generating device, which includes a rechargeable battery, control electronics, and an electric heater for heating an aerosol generating article specifically designed for use with the aerosol generating device. In some embodiments, the aerosol generating article includes an aerosol-forming substrate, such as a tobacco rod or tobacco plug, and a heater housed within the aerosol generating device is inserted into or disposed around the aerosol-forming substrate when the aerosol generating article is inserted into the aerosol generating device. In an alternative electrically operated smoking system, the aerosol generating article may include a capsule containing an aerosol-forming substrate, such as loose tobacco.

[0003] In known electrically operated smoking systems, the number of smoking experiences that can be provided by the device before the battery needs to be recharged is limited by the battery storage capacity. However, increasing the battery storage capacity requires a physically larger battery, resulting in a larger and heavier aerosol generating device, which may not be desirable for users. Thus, manufacturers may select a battery size that provides a compromise between the battery storage capacity and the physical size of the aerosol generating device. However, the compromise may not satisfy all users, since some users may prefer a larger battery capacity and other users may prefer a smaller aerosol generating device.

[0004] It would be desirable to provide an aerosol generating device that reduces or overcomes power supply capacity issues. Summary of the Invention

[0005] According to the present invention there is provided an aerosol generating device comprising a housing comprising a first housing part and a second housing part. The first housing part may define a chamber for receiving an aerosol-forming substrate. The second housing part may be configured to be removably attached to the first housing part. The aerosol generating device may comprise an electric heater. The electric heater may be located within the first housing part. The aerosol generating device may comprise a power source. The power source may be located within the second housing part. The aerosol generating device may comprise a controller. The controller may be located within the first housing part. The controller may be configured to control the supply of power from the power source to the electric heater. The controller may be configured to control the supply of power from the power source to the electric heater when the second housing part is attached to the first housing part.

[0006] According to an embodiment of the present invention, there is provided an aerosol generating device comprising a housing comprising a first housing portion and a second housing portion. The first housing portion defines a chamber for receiving an aerosol-forming substrate. The second housing portion is configured for removable attachment to the first housing portion. The aerosol generating device also comprises an electric heater positioned within the first housing portion. The aerosol generating device also comprises a power source positioned within the second housing portion. The aerosol generating device also comprises a controller positioned within the first housing portion, the controller configured to control the supply of power from the power source to the electric heater when the second housing portion is attached to the first housing portion.

[0007] Advantageously, providing a power source in a second housing part that is removable from the first housing part may facilitate the use of a single first housing part with multiple different power sources. For example, when the power source is fully discharged, the user may replace the second housing part with a further housing part containing a different fully charged power source. Advantageously, this may allow the user to continue using the aerosol generating device without waiting for the power source to be recharged. In another embodiment, the user may select the second housing part from a range of housing parts having different sizes and comprising power sources with different storage capacities. Advantageously, this may allow the user to select a preferred compromise between power source storage capacity and the physical size of the aerosol generating device.

[0008] Advantageously, locating the controller and the electric heater within the first housing part may reduce or minimize the number of electrical components within the second housing part. Advantageously, reducing or minimizing the number of electrical components within the second housing part may reduce or minimize the cost of the second housing part. Reducing or minimizing the cost of the second housing part may be particularly desirable for users who wish to purchase multiple housing parts, each with a power source for use within the first housing part.

[0009] Preferably, the housing includes an interface for attaching the second housing portion to the first housing portion.

[0010] The interface may be configured to removably attach and hold the second housing portion with the first housing portion by an interference fit. Advantageously, the interference fit may provide a simple and cost-effective arrangement for attaching the second housing portion to the first housing portion.

[0011] The interface may comprise at least one of a bayonet connection and a threaded connection. The interface may comprise a female bayonet connector on the first housing portion and a male bayonet connector on the second housing portion. The interface may comprise a male bayonet connector on the first housing portion and a female bayonet connector on the second housing portion. The interface may comprise a female thread on the first housing portion and a male thread on the second housing portion. The interface may comprise a male thread on the first housing portion and a female thread on the second housing portion.

[0012] The interface may include a slot arranged to receive at least a portion of the first housing portion or at least a portion of the second housing portion. The slot may be arranged to slidably receive at least a portion of the first housing portion or at least a portion of the second housing portion. The slot may be provided on the first housing portion and arranged to receive at least a portion of the second housing portion. The slot may be provided on the second housing portion and arranged to receive at least a portion of the first housing portion.

[0013] The interface may include a protrusion arranged to be received within the slot. The slot may be arranged to slidably receive the protrusion. The slot may be provided on the first housing portion and the protrusion may be provided on the second housing portion. The slot may be provided on the second housing portion and the protrusion may be provided on the first housing portion.

[0014] The interface may comprise a latching element arranged to hold the second housing portion in releasable attachment with the first housing portion. Advantageously, the latching element may reduce a risk of the second housing portion being accidentally detached from the first housing portion. The latching element may comprise a detent. The detent may be provided on the first housing portion and arranged to engage with a portion of the second housing portion when the second housing portion is attached to the first housing portion. The detent may be provided on the second housing portion and arranged to engage with a portion of the first housing portion when the second housing portion is attached to the first housing portion.

[0015] The interface may comprise a release element arranged to disengage the latch element. The release element may be arranged to disengage the latch element from the first housing portion. The release element may be arranged to disengage the latch element from the second housing portion. The release element may comprise at least one of a lever and a button. In embodiments where the latch element comprises a detent on the first housing portion, the release element may be arranged to disengage the latch element from a portion of the second housing portion. In embodiments where the latch element comprises a detent on the second housing portion, the release element may be arranged to disengage the detent from a portion of the first housing portion.

[0016] The interface may comprise a first magnetic element on the first housing portion and a second magnetic element on the second housing portion, the second magnetic element being positioned to engage the first magnetic element when the second housing portion is attached to the first housing portion.

[0017] As used herein, the term "magnetic element" is used to refer to magnets and magnetizable materials such as ferromagnetic materials. The first magnetic element may comprise a magnet and the second magnetic element may comprise a magnetizable material. The first magnetic element may comprise a magnetizable material and the second magnetic element may comprise a magnet. The first magnetic element and the second magnetic element may each comprise a magnet.

[0018] The aerosol generating device may comprise a first electrical contact positioned on the first housing portion and a second electrical contact positioned on the second housing portion, the second electrical contact configured to engage the first electrical contact when the second housing portion is attached to the first housing portion. Advantageously, the first electrical contact and the second electrical contact may facilitate the transfer of at least one of power and data between the first and second housing portions.

[0019] Preferably, the controller is configured to control the supply of electrical power from the power source to the electric heater via the first electrical contact and the second electrical contact when the second housing part is attached to the first housing part.

[0020] At least one of the first electrical contact and the second electrical contact may comprise a spring-loaded pin. Advantageously, the spring-loaded pin may facilitate a reliable electrical connection between the first electrical contact and the second electrical contact when the second housing portion is attached to the first housing portion.

[0021] The power source may be a rechargeable power source. The aerosol generating device may comprise a charging circuit located within the second housing part and configured to control a supply of power received from an external device to recharge the power source. Advantageously, providing a charging circuit within the second housing part may facilitate recharging of the power source when the second housing part is detached from the first housing part.

[0022] The aerosol generating device may comprise a charging electrical contact positioned on the second housing portion for receiving a supply of power from an external device to recharge the power source.

[0023] The charging electrical contacts may be positioned on the second housing portion such that the charging electrical contacts are accessible to a user when the second housing portion is attached to the first housing portion. Advantageously, this arrangement may facilitate recharging of the power source when the second housing portion is attached to the first housing portion. Recharging of the power source when the second housing portion is attached to the first housing portion may be convenient for a user.

[0024] The charging electrical contacts may be positioned on the second housing part such that when the second housing part is attached to the first housing part, the charging electrical contacts are inaccessible to a user. Advantageously, this arrangement may prevent recharging of the power source when the second housing part is attached to the first housing part. Preventing recharging of the power source when the second housing part is attached to the first housing part may be useful to prevent recharging of the power source while the aerosol generating device is in use.

[0025] In embodiments in which the aerosol generating device comprises a second electrical contact on the second housing portion, the charging electrical contact may comprise the second electrical contact.

[0026] The second housing portion may include a first end and a second end opposite the first end. The second electrical contact may be located at the first end of the second housing portion. The charging electrical contact may be located at the second end of the second housing portion.

[0027] The charging electrical contacts may form part of an external plug or socket on the second housing portion. The charging electrical contacts may form part of a USB-A connector, a USB-B connector, a USB-C connector, or a micro USB connector. For example, the aerosol generating device may include a USB plug or socket that allows the aerosol generating device to be connected to another USB-enabled device. The USB plug or socket may allow the aerosol generating device to be connected to a USB charging device to recharge the power source. The USB plug or socket may support data transfer to and / or from the aerosol generating device. The aerosol generating device may be connectable to a computer, and data such as a new heating profile may be transferred to the aerosol generating device.

[0028] In embodiments in which the aerosol generating device comprises a USB plug or socket, the aerosol generating device may further comprise a removable cover for covering the USB plug or socket when not in use. In embodiments in which the USB plug or socket is a USB plug, the USB plug may additionally or alternatively be selectively retractable within the device.

[0029] The charging circuit may comprise a wireless charging circuit configured to wirelessly receive a supply of power from an external device to recharge the power source. The wireless charging circuit may be provided as an alternative to the charging electrical contacts. The aerosol generating device may comprise both the charging electrical contacts and the wireless charging circuit and may enable recharging of the power source via the charging electrical contacts and the wireless charging circuit.

[0030] The aerosol generating device may include a charging indicator located on the second housing portion, the charging indicator configured to provide a user with a visual indication of the amount of charge stored in the power source. Advantageously, the charging indicator may assist the user in planning when to recharge the power source.

[0031] The charging indicator may comprise a segmented display, for example, the charging indicator may comprise a series of light emitting diodes (LEDs), the charging indicator being configured to illuminate a number of LEDs to represent the amount of charge stored in the power source.

[0032] The aerosol generating device may include a user input for activating the charging indicator, for example, the aerosol generating device may include a push button located on the second housing portion and configured to activate the charging indicator.

[0033] The power source may be a DC voltage supply. In a preferred embodiment, the power source is a battery. For example, the power source may be a nickel metal hydride battery, a nickel cadmium battery, or a lithium-based battery (e.g., a lithium cobalt battery, a lithium iron phosphate battery, or a lithium polymer battery). Alternatively, the power source may be another form of charge storage device, such as a capacitor. Preferably, the power source is rechargeable. The power source may have a capacity that allows for storage of sufficient energy for multiple uses of the aerosol generating device.

[0034] The power source may be a first power source, and the aerosol generating device further comprises a third housing portion configured for removable attachment to the first housing portion, and a second power source positioned within the third housing portion.

[0035] Advantageously, providing a first power source and a second power source may enable the use of the first housing part with either the second housing part with the first power source or the third housing part with the second power source. Advantageously, this may enable the user to continue using the aerosol generating device without waiting for one of the power sources to be recharged. For example, when the first power source is depleted, the user can detach the second housing part from the first housing part and then attach the third housing part to the first housing part and continue to use the aerosol generating device with the second power source. While using the aerosol generating device within the second power source, the user may recharge the first power source. The reverse procedure may be used when the second power source is depleted and the first power source is recharged.

[0036] The interface may be configured to attach the third housing portion to the first housing portion. The interface may be configured to allow only one of the second housing portion and the third housing portion to be attached to the first housing portion at a time. In other words, the interface may be configured such that the second housing portion and the third housing portion are not simultaneously attached to the first housing portion.

[0037] The interface may be configured to removably attach and hold the third housing portion with the first housing portion by an interference fit. Advantageously, the interference fit may provide a simple and cost-effective arrangement for attaching the third housing portion to the first housing portion.

[0038] The interface may comprise at least one of a bayonet connection and a threaded connection. The interface may comprise a female bayonet connector on the first housing portion and a male bayonet connector on each of the second and third housing portions. The interface may comprise a male bayonet connector on the first housing portion and a female bayonet connector on each of the second and third housing portions. The interface may comprise a female thread on the first housing portion and a male thread on each of the second and third housing portions. The interface may comprise a male thread on the first housing portion and a female thread on each of the second and third housing portions.

[0039] The interface may include a slot disposed to receive at least a portion of the first housing portion or at least a portion of the third housing portion. The slot may be disposed to slidably receive at least a portion of the first housing portion or at least a portion of the third housing portion.

[0040] The slot may be provided on the first housing portion and may be arranged to receive at least a portion of the second housing portion and at least a portion of the third housing portion. The slot may be a first slot provided on the second housing portion and the interface further comprises a second slot provided on the third housing portion, each of the first slot and the second slot arranged to receive at least a portion of the first housing portion.

[0041] The interface may comprise a protrusion arranged to be received within the slot. The slot may be arranged to slidably receive the protrusion. The slot may be provided on the first housing portion, the protrusion may be a first protrusion provided on the second housing portion, and the interface further comprises a second protrusion provided on the third housing portion. The slot may be a first slot provided on the second housing portion, and the interface further comprises a second slot provided on the third housing portion, and the protrusion may be provided on the first housing portion.

[0042] The latch element may be arranged to hold the third housing portion in removably attached relation with the first housing portion. The latch element may comprise a detent. The detent may be provided on the first housing and arranged to engage a portion of the second housing portion when the second housing portion is attached to the first housing portion and arranged to engage a portion of the third housing portion when the third housing portion is attached to the first housing portion. The detent may be a first detent provided on the second housing portion and arranged to engage a portion of the first housing portion when the second housing portion is attached to the first housing portion. The latch element may further comprise a second detent provided on the third housing portion and arranged to engage a portion of the first housing portion when the third housing portion is attached to the first housing portion.

[0043] The release element may be positioned to disengage the latch element from the first housing portion. The release element may be a first release element provided on the second housing portion, and the interface further comprises a second release element provided on the third housing portion.

[0044] The release element may be positioned to disengage the latch element from the third housing portion. In embodiments where the latch element comprises a detent on the first housing portion, the release element may be positioned to disengage the latch element from a portion of the third housing portion. In embodiments where the latch element comprises a second detent on the third housing portion, the second release element may be positioned to disengage the second detent from a portion of the first housing portion.

[0045] The interface may comprise a third magnetic element on the third housing portion and may be arranged to engage the first magnetic element when the third housing portion is attached to the first housing portion. The first magnetic element may comprise a magnet and the third magnetic element may comprise a magnetizable material. The first magnetic element may comprise a magnetizable material and the third magnetic element may comprise a magnet. The first magnetic element and the third magnetic element may each comprise a magnet.

[0046] The aerosol generating device may include a third electrical contact positioned on the third housing portion, the third electrical contact configured to engage the first electrical contact when the third housing portion is attached to the first housing portion. Advantageously, the first electrical contact and the third electrical contact may facilitate the transfer of at least one of power and data between the first and third housing portions.

[0047] Preferably, the controller is configured to control the supply of power from the second power source to the electric heater via the first electrical contacts and the third electrical contacts when the third housing part is attached to the first housing part.

[0048] At least one of the first electrical contact and the third electrical contact may include a spring-loaded pin. Advantageously, the spring-loaded pin may facilitate a reliable electrical connection between the first electrical contact and the third electrical contact when the third housing portion is attached to the first housing portion.

[0049] The second power source may be a rechargeable power source. The aerosol generating device may comprise a charging circuit located within the third housing part and configured to control a supply of power received from an external device to recharge the second power source. Advantageously, providing the charging circuit within the third housing part may facilitate recharging of the second power source when the third housing part is detached from the first housing part.

[0050] The aerosol generating device may include a charging electrical contact located on the third housing portion for receiving a supply of power from an external device to recharge the second power source.

[0051] The charging electrical contacts may be positioned on the third housing portion such that the charging electrical contacts are accessible to a user when the third housing portion is attached to the first housing portion. Advantageously, this arrangement may facilitate recharging of the second power source when the third housing portion is attached to the first housing portion. Recharging of the second power source when the third housing portion is attached to the first housing portion may be convenient for a user.

[0052] The charging electrical contacts may be positioned on the third housing portion such that the charging electrical contacts are inaccessible to a user when the third housing portion is attached to the first housing portion. Advantageously, this arrangement may prevent recharging of the second power source when the third housing portion is attached to the first housing portion. Preventing recharging of the second power source when the third housing portion is attached to the first housing portion may be useful to prevent recharging of the second power source while the aerosol generating device is in use.

[0053] In embodiments in which the aerosol generating device comprises a third electrical contact on the third housing portion, the charging electrical contact may comprise the third electrical contact.

[0054] The third housing portion may include a first end and a second end opposite the first end. The third electrical contact may be located at the first end of the third housing portion. The charging electrical contact may be located at the second end of the third housing portion.

[0055] The charging electrical contacts may form part of an external plug or socket on the third housing portion. The charging electrical contacts may form part of a USB-A connector, a USB-B connector, a USB-C connector, or a micro USB connector. For example, the aerosol generating device may include a USB plug or socket that allows the aerosol generating device to be connected to another USB-enabled device. The USB plug or socket may allow the aerosol generating device to be connected to a USB charging device to recharge the second power source. The USB plug or socket may support data transfer to and / or from the aerosol generating device. The aerosol generating device may be connectable to a computer, and data such as a new heating profile may be transferred to the aerosol generating device.

[0056] In embodiments in which the aerosol generating device comprises a USB plug or socket, the aerosol generating device may further comprise a removable cover for covering the USB plug or socket when not in use. In embodiments in which the USB plug or socket is a USB plug, the USB plug may additionally or alternatively be selectively retractable within the device.

[0057] The charging circuit may comprise a wireless charging circuit configured to wirelessly receive a supply of power from an external device to recharge the second power source. The wireless charging circuit may be provided as an alternative to the charging electrical contacts. The aerosol generating device may comprise both the charging electrical contacts and the wireless charging circuit and may enable recharging of the second power source via the charging electrical contacts and the wireless charging circuit.

[0058] The aerosol generating device may include a charging indicator located on the third housing portion, the charging indicator configured to provide a user with a visual indication of the amount of charge stored in the second power source. Advantageously, the charging indicator may assist the user in planning when to recharge the second power source.

[0059] The charging indicator may comprise a segmented display, for example, the charging indicator may comprise a series of light emitting diodes (LEDs), the charging indicator being configured to illuminate a number of LEDs to represent the amount of charge stored in the second power source.

[0060] The aerosol generating device may include a user input for activating the charging indicator, for example, the aerosol generating device may include a push button located on the third housing portion and configured to activate the charging indicator.

[0061] The second power source may be a DC voltage supply. In a preferred embodiment, the second power source is a battery. For example, the second power source may be a nickel metal hydride battery, a nickel cadmium battery, or a lithium-based battery (e.g., a lithium cobalt battery, a lithium iron phosphate battery, or a lithium polymer battery). Alternatively, the second power source may be another form of charge storage device, such as a capacitor. Preferably, the second power source is rechargeable. The second power source may have a capacity that allows for storage of sufficient energy for multiple uses of the aerosol generating device.

[0062] The first power source may have a first charge storage capacity and the second power source may have a second charge storage capacity.

[0063] The first charge storage capacity may be the same as the second charge storage capacity.

[0064] The first charge storage capacity may be different from the second charge storage capacity. Advantageously, providing different charge storage capacities for the first and second power sources may facilitate providing different dimensions for the second and third housing portions. Advantageously, a user may choose whether to use the third housing portion with the first housing portion depending on whether the user prefers a large charge storage capacity or a physically smaller aerosol generating device. Advantageously, if the user's preferences change, the user may choose to replace the second housing portion with the third housing portion or the third housing portion with the second housing portion.

[0065] The ratio of the first charge storage capacity to the second charge storage capacity may be between about 1.5 and about 3, optionally between about 1.5 and about 2.5, optionally between about 1.7 and about 2.3.

[0066] The second housing portion may have a different size than the third housing portion.

[0067] The second housing portion may have a different shape than the third housing portion.

[0068] The chamber of the first housing portion may define a reservoir for containing the liquid aerosol-forming substrate.The first housing portion may define an airflow outlet at a first end of the first housing portion.

[0069] The chamber may define a cavity for receiving the aerosol-generating article. The first housing portion may define an opening at an end of the cavity, the opening being located at the first end of the first housing portion.

[0070] The first housing portion may include a second end opposite the first end, the second housing portion configured for removable attachment to the second end of the first housing portion. In embodiments in which the aerosol generation device includes a third housing portion, the third housing portion may be configured for removable attachment to the second end of the first housing portion.

[0071] The first housing portion may include a second end opposite the first end and at least one sidewall extending between the first end and the second end, the second housing portion configured for removable attachment to the at least one sidewall. In embodiments in which the aerosol generation device includes a third housing portion, the third housing portion may be configured for removable attachment to the at least one sidewall.

[0072] The aerosol generating device may be configured such that only one of the second housing part and the third housing part may be attached to the first housing part at a time, in other words, the aerosol generating device may be configured such that the second housing part and the third housing part are not attached to the first housing part at the same time.

[0073] The aerosol generating device may comprise a closure member arranged to move between a closed position in which the closure member at least partially covers the opening, and an open position in which the opening is uncovered.

[0074] The closure member may be a first closure member attached to the second housing portion. The first closure member may be arranged to rotate relative to the second housing portion between a closed position and an open position. The first closure member may be arranged to overhang the second housing portion when the first closure member is in the open position.

[0075] In embodiments in which the aerosol generating device comprises a third housing portion, the aerosol generating device may comprise a second closure member arranged to move between a closed position in which the second closure member at least partially covers the opening, and an open position in which the opening is uncovered.

[0076] The second closure member may be attached to the third housing portion. The second closure member may be arranged to rotate relative to the third housing portion between a closed position and an open position. The second closure member may be arranged to overhang the third housing portion when the second closure member is in the open position.

[0077] Each of the first housing portion, the second housing portion, and the third housing portion may comprise any suitable material or combination of materials. Examples of suitable materials include metals, alloys, plastics, or composites containing one or more of these materials, or thermoplastics suitable for food or pharmaceutical applications, such as polypropylene, polyetheretherketone (PEEK), and polyethylene. Preferably, the material is light and not brittle.

[0078] The electric heater may be located outside the chamber.

[0079] An electric heater may be positioned within the chamber.

[0080] The electric heater may be in the form of a coil. The electric heater may be configured to heat the fluid transport structure. The aerosol generation device may comprise a fluid transport structure, the electric heater being arranged to heat the fluid transport structure. The fluid transport structure may comprise a wick. The electric heater may be in the form of a coil, the electric heater being wound around the fluid transport structure.

[0081] The chamber may define a cavity for receiving the aerosol-generating article. The electric heater may be arranged to extend around an outer surface of the aerosol-generating article received in the cavity. The electric heater may extend into the cavity. The electric heater may be arranged to be received within the aerosol-generating article when the aerosol-generating article is inserted into the cavity. The electric heater may be an elongated electric heater. The electric heater may be blade shaped. The electric heater may be pin shaped. The electric heater may be cone shaped.

[0082] The electric heater may comprise an induction heating element. In use, the induction heating element inductively heats at least one of the susceptor materials to heat an aerosol-generating article received within the cavity. The at least one susceptor material may form part of the aerosol generating device. The at least one susceptor material may form part of the aerosol-generating article. The induction heating element may comprise at least one induction coil extending around at least a portion of the cavity such that when the aerosol-generating article is inserted into the cavity, at least a portion of the aerosol-generating article is received within the induction coil.

[0083] The electric heater may comprise a resistive heating element. In use, an electric current is supplied to the resistive heating element to generate heat by resistive heating.

[0084] Suitable materials for forming the resistive heating element include, but are not limited to, semiconductors such as doped ceramics, "conductive" ceramics (such as, for example, molybdenum disilicide), carbon, graphite, metals, metal alloys, and composites made of ceramic and metallic materials. Such composites may include doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbide. Examples of suitable metals include titanium, zirconium, tantalum, and platinum group metals. Examples of suitable metal alloys include stainless steel, nickel-containing, cobalt-containing, chromium-containing, aluminum-containing, titanium-containing, zirconium-containing, hafnium-containing, niobium-containing, molybdenum-containing, tantalum-containing, tungsten-containing, tin-containing, gallium-containing, manganese-containing, and iron-containing alloys, as well as nickel-, iron-, cobalt-, and stainless steel-based superalloys, Timetal®, and iron-manganese-aluminum-based alloys.

[0085] In some embodiments, the resistive heating element comprises one or more stamped sections of an electrically resistive material (such as stainless steel), or may comprise a heating wire or filament (e.g., Ni-Cr (nickel-chromium), platinum, tungsten, or alloy wire).

[0086] The electric heater may comprise an electrically insulating substrate, and the resistive heating element is provided on the electrically insulating substrate. The electrically insulating substrate may be a ceramic material, such as zirconia or alumina. Preferably, the electrically insulating substrate has a thermal conductivity of about 2 watts per meter per kelvin or less.

[0087] Preferably, the controller is arranged to provide power from the power supply to the electric heater in accordance with a predetermined heating cycle when the aerosol generating device is used to heat an aerosol-generating article received within the cavity.

[0088] In embodiments in which the electric heater comprises a resistive heating element, the controller may be arranged to provide power from the power source to the resistive heating element in response to a predetermined pyrolysis cycle to clean the electric heater when there is no aerosol-generating article received within the cavity. The pyrolysis cycle may clean the electric heater by pyrolysis of residue remaining on the electric heater after use of the aerosol-generating device to heat one or more aerosol-generating articles. Typically, the maximum temperature to which the electric heater is heated during the pyrolysis cycle is higher than the maximum temperature to which the electric heater is heated during a heating cycle for heating an aerosol-generating article. Typically, the total duration of the pyrolysis cycle is less than the total duration of the heating cycle.

[0089] Preferably, the aerosol generating device comprises at least one air inlet. Preferably, the at least one air inlet is in fluid communication with the cavity.

[0090] The aerosol generating device may include a sensor for detecting airflow, indicating that the user is taking a puff. The airflow sensor may be an electromechanical device. The airflow sensor may be a mechanical device, an optical device, an opto-mechanical device, or a microelectromechanical system (MEMS) based sensor. The aerosol generating device may include a manually operable switch for the user to initiate a puff.

[0091] The aerosol generating device may include a temperature sensor. The temperature sensor may detect the temperature of the electric heater or the temperature of the aerosol-generating article received within the cavity. The temperature sensor may be a thermistor. The temperature sensor may include circuitry configured to measure the resistivity of the electric heater and derive the temperature of the electric heater by comparing the measured resistivity to a calibration curve of resistivity versus temperature.

[0092] Advantageously, deriving the temperature of the electric heater may facilitate control of the temperature to which the electric heater is heated during use. The controller may be configured to adjust the supply of power to the electric heater in response to changes in the measured resistivity of the electric heater.

[0093] Advantageously, deriving the temperature of the electric heater may facilitate detection of a puff, for example a measured decrease in temperature of the electric heater may correspond to a user puffing or inhaling on the aerosol generating device.

[0094] Preferably, the aerosol generating device comprises an indicator to indicate when the electric heater is activated. The indicator may comprise a light which is activated when the electric heater is activated.

[0095] According to the present disclosure there is also provided an aerosol generating system comprising an aerosol generating device as described herein and an aerosol-generating article comprising an aerosol-forming substrate.

[0096] As used herein, the term "aerosol-generating article" refers to an article that includes an aerosol-forming substrate that, when heated, releases volatile compounds that can form an aerosol.

[0097] The aerosol-forming substrate may comprise a tobacco plug. The tobacco plug may comprise one or more of powders, granules, pellets, pieces, spaghetti, strips, or sheets containing one or more of tobacco leaves, tobacco stem fragments, reconstituted tobacco, homogenized tobacco, extruded tobacco, and expanded tobacco. Optionally, the tobacco plug may contain additional tobacco or non-tobacco, volatile flavor compounds that are released upon heating of the tobacco plug. Optionally, the tobacco plug may also contain capsules, for example, containing additional tobacco or non-tobacco, volatile flavor compounds. Such capsules may melt during heating of the tobacco plug. Alternatively, or additionally, such capsules may be crushed before, during, or after heating of the tobacco plug.

[0098] The aerosol-generating article may comprise a mouthpiece located downstream of the tobacco plug. The mouthpiece may be disposed at a downstream end of the aerosol-generating article. The mouthpiece may comprise a cellulose acetate filter plug.

[0099] The present invention is defined in the claims. However, below is provided a non-exhaustive list of non-limiting examples. Any one or more of the features of these examples may be combined with any one or more features of the other examples, embodiments, or aspects described herein.

[0100] Example 1: An aerosol generating device comprising: a housing comprising a first housing portion and a second housing portion defining a chamber for receiving an aerosol-forming substrate, the second housing portion being configured for removable attachment to the first housing portion; an electric heater positioned within the first housing portion; a power source positioned within the second housing portion; An aerosol generating device comprising: a controller positioned within the first housing part, the controller configured to control the supply of power from the power source to the electric heater when the second housing part is attached to the first housing part.

[0101] Example 2: The aerosol generating device of example 1, wherein the housing comprises an interface for attaching the second housing portion to the first housing portion.

[0102] Example 3: The aerosol generating device of example 2, wherein the interface is configured to releasably attach and retain the second housing portion with the first housing portion by an interference fit.

[0103] Example 4: An aerosol generation device as described in Example 2 or 3, wherein the interface comprises at least one of a bayonet connection and a threaded connection.

[0104] Example 5: An aerosol generating device as described in any of Examples 2 to 4, wherein the interface comprises a slot positioned to receive at least a portion of the first housing portion or at least a portion of the second housing portion.

[0105] Example 6: An aerosol generating device as described in any of Examples 2 to 5, wherein the interface comprises a latching element arranged to removably attach and hold the second housing portion to the first housing portion.

[0106] Example 7: The aerosol generating device of example 6, wherein the interface further comprises a release element arranged to disengage the latch element.

[0107] Example 8: An aerosol generating device described in any of Examples 2 to 7, wherein the interface comprises a first magnetic element on the first housing portion and a second magnetic element on the second housing portion, the second magnetic element being positioned to engage with the first magnetic element when the second housing portion is attached to the first housing portion.

[0108] Example 9: An aerosol generating device as described in any of the preceding examples, further comprising a first electrical contact positioned on the first housing portion and a second electrical contact positioned on the second housing portion, the second electrical contact configured to engage with the first electrical contact when the second housing portion is attached to the first housing portion.

[0109] Example 10: An aerosol generating device as described in Example 9, wherein the controller is configured to control the supply of power from the power source to the electric heater via the first electrical contact and the second electrical contact when the second housing part is attached to the first housing part.

[0110] Example 11: An aerosol generating device as described in Example 9 or 10, wherein at least one of the first electrical contact and the second electrical contact comprises a spring-loaded pin.

[0111] Example 12: An aerosol generating device as described in any of the preceding examples, wherein the power source is a rechargeable power source and the aerosol generating device comprises a charging circuit positioned within the second housing portion and configured to control the supply of power received from an external device to recharge the power source.

[0112] Example 13: An aerosol generating device as described in Example 12, further comprising a charging electrical contact positioned on the second housing portion for receiving a supply of power from an external device to recharge the power source.

[0113] Example 14: The aerosol generating device of example 13 in combination with example 9, wherein the charging electrical contact comprises a second electrical contact.

[0114] Example 15: An aerosol generating device as described in Example 13 in combination with Example 9, wherein the second electrical contact is positioned at a first end of the second housing portion, the second housing portion having a second end opposite the first end, and the charging electrical contact is positioned at the second end of the second housing portion.

[0115] Example 16: An aerosol generating device according to any of Examples 13 to 15, wherein the charging electrical contacts form part of a USB-A connector, a USB-B connector, a USB-C connector, or a micro USB connector.

[0116] Example 17: An aerosol generating device described in any of Examples 12 to 16, comprising a wireless charging circuit, the charging circuit configured to wirelessly receive a supply of power from an external device to recharge the power source.

[0117] Example 18: An aerosol generating device as described in any of the preceding examples, further comprising a charging indicator positioned on the second housing portion, the charging indicator configured to provide a user with a visual indication of the amount of charge stored in the power source.

[0118] Example 19: An aerosol generating device as described in Example 18, wherein the charging indicator comprises a segmented display.

[0119] Example 20: An aerosol generating device as described in Example 18 or 19, further comprising a push button located on the second housing portion and configured to activate the charging indicator.

[0120] Example 21: An aerosol generating device according to any of the preceding examples, wherein the power source comprises a battery.

[0121] Example 22: The aerosol generating device of Example 21, wherein the battery comprises a lithium-based battery.

[0122] Example 23: An aerosol generating device as described in Example 21 or 22, wherein the battery is a rechargeable battery.

[0123] Example 24: An aerosol generating device described in any of the preceding examples, wherein the power source is a first power source and the aerosol generating device further comprises a third housing portion configured for removable attachment to the first housing portion, and a second power source positioned within the third housing portion.

[0124] Example 25: The aerosol generating device of Example 24 in combination with Example 2, wherein the interface is configured to attach the third housing portion to the first housing portion.

[0125] Example 26: An aerosol generating device as described in Example 25, wherein the interface is configured to removably attach and retain the third housing portion with the first housing portion by an interference fit.

[0126] Example 27: An aerosol generating device as described in example 24 or 25 in combination with example 5, wherein the slot is positioned to receive at least a portion of the first housing portion or at least a portion of the third housing portion.

[0127] Example 28: An aerosol generating device described in any of Examples 25 to 27 in combination with Example 6, wherein a latch element is arranged to removably attach and hold the third housing part to the first housing part.

[0128] Example 29: The aerosol generating device of example 28 in combination with example 7, wherein the release element is arranged to disengage the latch element from the third housing.

[0129] Example 30: An aerosol generating device according to any of Examples 25 to 29 in combination with Example 8, wherein the interface comprises a third magnetic element on the third housing portion and arranged to engage with the first magnetic element when the third housing portion is attached to the first housing portion.

[0130] Example 31: An aerosol generating device described in any of Examples 24 to 30, further comprising a third electrical contact positioned on the third housing portion, the third electrical contact configured to engage with the first electrical contact when the third housing portion is attached to the first housing portion.

[0131] Example 32: An aerosol generating device as described in Example 31, wherein the controller is configured to control the supply of power from the second power source to the electric heater via the first electrical contact and the third electrical contact when the third housing part is attached to the first housing part.

[0132] Example 33: An aerosol generating device as described in Example 31 or 32, wherein at least one of the first electrical contact and the third electrical contact comprises a spring-loaded pin.

[0133] Example 34: An aerosol generating device described in any of Examples 24 to 33, wherein the second power source is a rechargeable power source and the aerosol generating device is provided with a charging circuit positioned within the third housing portion and configured to control the supply of power received from an external device to recharge the second power source.

[0134] Example 35: An aerosol generating device as described in Example 34, further comprising a charging electrical contact positioned on the third housing portion for receiving a supply of power from an external device to recharge the second power source.

[0135] Example 36: The aerosol generating device of Example 35 in combination with Example 31, wherein the charging electrical contact comprises a third electrical contact.

[0136] Example 37: An aerosol generating device as described in Example 35 in combination with Example 31, wherein the third electrical contact is positioned at a first end of the third housing portion, the third housing portion having a second end opposite the first end, and the charging electrical contact is positioned at the second end of the third housing portion.

[0137] Example 38: An aerosol generating device described in any of Examples 35 to 37, wherein the charging electrical contacts form part of a USB-A connector, a USB-B connector, a USB-C connector, or a micro USB connector.

[0138] Example 39: An aerosol generating device as described in Example 34, wherein the charging circuit is a wireless charging circuit configured to wirelessly receive a supply of power from an external device to recharge the second power source.

[0139] Example 40: An aerosol generating device described in any of Examples 24 to 39, further comprising a charging indicator positioned on the third housing portion, the charging indicator configured to provide a user with a visual indication of the amount of charge stored in the second power source.

[0140] Example 41: An aerosol generating device as described in Example 40, wherein the charging indicator comprises a segmented display.

[0141] Example 42: An aerosol generating device as described in Example 40 or 41, further comprising a push button positioned on the third housing portion and configured to activate the charging indicator.

[0142] Example 43: An aerosol generating device according to any one of Examples 24 to 42, wherein the second power source comprises a battery.

[0143] Example 44: An aerosol generating device as described in Example 43, wherein the battery comprises a lithium-based battery.

[0144] Example 45: An aerosol generating device as described in Example 43 or 44, wherein the battery is a rechargeable battery.

[0145] Example 46: An aerosol generating device described in any of Examples 24 to 45, wherein the first power source has a first charge storage capacity, the second power source has a second charge storage capacity, and the first charge storage capacity is different from the second charge storage capacity.

[0146] Example 47: The aerosol generating device according to Example 46, wherein the ratio of the first charge storage capacity to the second charge storage capacity is between 1.5 and 3.

[0147] Example 48: The aerosol generating device according to Example 47, wherein the ratio of the first charge storage capacity to the second charge storage capacity is between 1.5 and 2.5.

[0148] Example 49: The aerosol generating device according to Example 48, wherein the ratio of the first charge storage capacity to the second charge storage capacity is between 1.7 and 2.3.

[0149] Example 50: An aerosol generating device as described in any of Examples 24 to 49, wherein the second housing part has a different size than the third housing part.

[0150] Example 51: An aerosol generating device as described in any of Examples 24 to 50, wherein the second housing part has a different shape than the third housing part.

[0151] Example 52: An aerosol generating device according to any of the preceding examples, wherein the chamber defines a reservoir for accommodating a liquid aerosol-forming substrate, and the first housing portion defines an airflow outlet at a first end of the first housing portion.

[0152] Example 53: An aerosol generating device described in any of Examples 1 to 51, wherein the chamber defines a cavity for receiving an aerosol-generating article, the first housing portion defines an opening at an end of the cavity, and the opening is positioned at the first end of the first housing portion.

[0153] Example 54: An aerosol generating device as described in Example 52 or 53, wherein the first housing portion has a second end opposite the first end, and the second housing portion is configured for removable attachment to the second end of the first housing portion.

[0154] Example 55: The aerosol generating device of example 54 in combination with example 24, wherein the third housing portion is configured for removable attachment to the second end of the first housing portion.

[0155] Example 56: An aerosol generating device as described in Example 52 or 53, wherein the first housing portion has a second end opposite the first end and at least one side wall extending between the first end and the second end, and the second housing portion is configured for removable attachment to the at least one side wall.

[0156] Example 57: The aerosol generating device of Example 56 in combination with Example 24, wherein the third housing portion is configured for removable attachment to at least one side wall.

[0157] Example 58: An aerosol generating device as described in Example 56 or 57 in combination with Example 53, further comprising a first closing member arranged to move between a closed position in which the first closing member at least partially covers the opening when the second housing portion is attached to the first housing portion and an open position in which the opening is not covered, the first closing member being connected to the second housing portion.

[0158] Example 59: An aerosol generating device as described in Example 58, wherein the first closure member is arranged to rotate relative to the second housing portion between a closed position and an open position.

[0159] Example 60: An aerosol generating device as described in Example 58 or 59, wherein the first closure member is arranged to overhang the second housing portion when the first closure member is in the open position.

[0160] Example 61: An aerosol generating device described in any of Examples 58 to 60 in combination with Example 57, further comprising a second closing member arranged to move between a closed position in which the second closing member at least partially covers the opening when the third housing part is attached to the first housing part, and an open position in which the opening is not covered, the second closing member being connected to the third housing part.

[0161] Example 62: An aerosol generating device as described in Example 61, wherein the second closure member is arranged to rotate relative to the third housing part between a closed position and an open position.

[0162] Example 63: An aerosol generating device as described in Example 61 or 62, wherein the second closure member is arranged to overhang the third housing portion when the second closure member is in the open position.

[0163] The invention will now be further described, by way of example only, with reference to the accompanying drawings in which: [Brief description of the drawings]

[0164] [Figure 1] FIG. 1 is a cross-sectional view of an aerosol generating device according to a first embodiment of the invention, with a closure member in a closed position. [Diagram 2] FIG. 2 is a perspective view of the aerosol generating device of FIG. 1 with the closure member in an open position. [Diagram 3] FIG. 3 is a front view of the aerosol generating device of FIG. 1 with the closure member in a closed position. [Figure 4] FIG. 4 is a front view of the aerosol generating device of FIG. 1 with the closure member in an open position. [Diagram 5] FIG. 5 is a perspective view of the aerosol generating device of FIG. 1 with the closure member in a closed position. [Figure 6] FIG. 6 is a perspective view of the aerosol generating device of FIG. 1 with the closure member in an open position and an aerosol-generating article received within the cavity of the first housing portion. [Figure 7] FIG. 7 is a front view of the aerosol generating device of FIG. 1 with the closure member in an open position and the second housing portion moved relative to the first housing portion. [Figure 8] FIG. 8 is a perspective view of the aerosol generating device of FIG. 1 showing the second housing portion sliding relative to the first housing portion. [Figure 9] FIG. 9 is a perspective view of the aerosol generating device of FIG. 1 showing the second housing portion sliding relative to the first housing portion. [Figure 10] FIG. 10 is a perspective view of a second housing portion of the aerosol generating device of FIG. [Figure 11] FIG. 11 is a perspective view of the aerosol generating device of FIG. 1 showing the charging electrical contacts. [Figure 12] FIG. 12 shows a front view of an aerosol generating device according to a first embodiment in a first configuration with a second housing part. [Figure 13] FIG. 13 shows a front view of the aerosol generating device according to the first embodiment in a second configuration with a third housing part. [Figure 14]FIG. 14 shows a cross-sectional view of an aerosol generating device according to a second embodiment of the present invention. [Figure 15] FIG. 15 is a perspective view of the aerosol generating device of FIG. [Figure 16] FIG. 16 is a perspective view of the aerosol generating device of FIG. 14 showing the second housing portion detached from the first housing portion. [Figure 17] FIG. 17 shows a front view of an aerosol generating device according to a second embodiment in a first configuration with a second housing part. [Figure 18] FIG. 18 shows a front view of an aerosol generating device according to a second embodiment in a second configuration with a third housing part. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0165] 1-11 show an aerosol generating device 10 according to a first embodiment of the present invention. The aerosol generating device 10 comprises a housing 12 comprising a first housing portion 14 and a second housing portion 16. The second housing portion 16 is configured for removable attachment to the first housing portion 14. A first electrical contact 52 is positioned on the first housing portion 14 and a second electrical contact 62 is positioned on the second housing portion 16. The first electrical contact 52 and the second electrical contact 62 are arranged to contact each other when the second housing portion 16 is attached to the first housing portion 14.

[0166] The aerosol generating device 10 also comprises a charging circuit 19 and a first power source 20 positioned within the second housing part 16. The first power source 20 is a power source comprising a rechargeable battery. A charging electrical contact 49 in the form of a USB-C connector is included at an end of the second housing part 16 and is configured to receive a supply of power from an external device. The charging circuit 19 is configured to control the supply of power received from the external device to recharge the first power source 20.

[0167] The first housing portion 14 defines a chamber 32 in the form of a cavity for receiving an aerosol-generating article 80 and an opening 34 located at an end of the cavity. The opening 34 is located at a first end of the first housing portion 14. When the aerosol-generating article 80 is received within the cavity, the aerosol-generating article 80 and the aerosol generating device 10 together form an aerosol generating system.

[0168] The aerosol generating device 10 further comprises an electric heater 22 and a controller 18 positioned within the first housing portion 14. The electric heater 22 comprises an induction coil wound around a cavity. The controller 18 is configured to control the supply of power from the first power source 20 to the electric heater 22 via the first electrical contact 52 and the second electrical contact 62 when the second housing portion 16 is attached to the first housing portion 14. In use, the power supplied to the induction coil of the electric heater 22 generates a varying magnetic field that inductively heats a susceptor in an aerosol-generating article 80 received within the cavity to generate an aerosol.

[0169] The aerosol generating device 10 also includes a closure member 42 positioned at the first end of the housing. The closure member 42 includes a fixed portion 47 connected to the second housing portion 16 and a movable portion 46 integrally formed with the fixed portion 47. The closure member 42 is formed from a flexible material such that the closure member 42 may be folded on itself. In other words, the movable portion 46 may be rotated relative to the fixed portion 47. The movable portion 46 is rotatable relative to the fixed portion 47 between a closed position in which the movable portion 46 covers the opening 34 and an open position in which the movable portion 46 does not cover the opening 34. When the movable portion 46 is in the open position, the aerosol-generating article 80 may be received within the cavity. The closed position is illustrated in FIG. 1 and the open position is illustrated in FIG. 2.

[0170] A pair of magnets 70 are contained within the closure member 42 such that one magnet is positioned inside the movable part 46 and the other magnet is positioned inside the fixed part 47. The magnets 70 are positioned to hold the movable part 46 against the fixed part 47 when the movable part 46 is in the open position.

[0171] The closure member 42 also includes a protrusion 43 extending from the movable part 46. The protrusion 43 is integrally formed with the movable part 46 and has an annular shape. The protrusion 43 is positioned such that when the movable part 46 is in the closed position, the protrusion 43 is received within the opening 34 and engages the opening 34 with an interference fit. Advantageously, when the movable part 46 is in the closed position, the protrusion seals the opening 34 and holds the movable part 46 in the closed position.

[0172] The housing 12 includes a rim 44 extending around a portion of the periphery of the first end of the housing 12. The rim 44 forms a recess in which the closure member 42 is positioned. Advantageously, the rim 44 protects the fixed portion 47 and protects the movable portion 46 when the movable portion 46 is in the closed position. A gap 45 in the rim 44 on the first housing portion allows for gripping of an edge of the movable portion 46 when moving the movable portion 46 from the closed position to the open position.

[0173] The aerosol generating device 10 also includes an interface for mounting the second housing portion 16 to the first housing portion 14. The interface includes a slot 90 configured to slidably receive at least a portion of the first housing portion 14. The slot 90 facilitates sliding movement of the second housing portion 16 relative to the first housing portion 14. The second electrical contact 62 on the second housing portion 16 engages with the first electrical contact 52 on the first housing portion 14 when the second housing portion 16 is mounted to the first housing portion 14. The first housing portion 14 includes a sidewall 15 extending between a first end of the first housing portion 14 and a second end of the first housing portion 14 opposite the first end. The interface is configured for removable mounting of the second housing portion 16 to the sidewall 15 of the first housing portion 14.

[0174] As shown in FIGS. 7-9, the second housing portion 16 is slidably removable from the first housing portion 14. To remove the second housing portion 16 from the first housing portion 14, a release button 51 on the second end of the first housing portion 14 is pressed to disengage the latching elements from the second housing portion 16. Pressing the release button 51 allows the second housing portion 16 to slide relative to the first housing portion 14 until the second housing portion 16 is completely removed from the first housing portion 14. To attach the second housing portion 16 to the first housing portion 14, the sliding action is reversed until the latching elements engage the second housing portion 16. To facilitate alignment of the second housing portion 16 with the first housing portion 14, a protrusion 91 on the first housing portion 14 is positioned to slide within a guide slot 90 on the second housing portion 16.

[0175] As shown in Figure 9, when the second housing portion 16 is removed from the first housing portion 14, a device reset button 53 provided on the first housing portion 14 is exposed. As shown in Figure 10, when the second housing portion 16 is removed from the first housing portion 14, an LED charging indicator 73 provided on the second housing portion 16 is exposed. The LED charging indicator 73 is configured to provide a user with a visual indication of the amount of charge stored within the first power source 20.

[0176] Figure 12 shows a front view of the aerosol generation device 10 in a first configuration in which the second housing part 16 is attached to the first housing part 14. Figure 13 shows a front view of the aerosol generation device 10 in a second configuration in which the second housing part 16 is replaced by a third housing part 116. The aerosol generation device 10 is configured such that only one of the second housing part 16 and the third housing part 116 may be removably attached to the first housing part at a time.

[0177] The third housing part 116 is similar to the second housing part 16 and includes the same features as described with respect to the second housing part 16. The third housing part 116 differs from the second housing part 16 by the charge storage capacity of the power source and the physical size of the third housing part 116. In particular, the third housing part 116 includes a second power source having a smaller charge storage capacity than the first power source 20 of the second housing part 16. Thus, the second power source has a smaller physical size than the first power source 20, and as a result, the third housing part 116 has a smaller physical size than the second housing part 16. Advantageously, the second housing part 16 and the third housing part 116 allow a user to choose between a first configuration shown in FIG. 12, in which the aerosol generating device 10 includes a power source with a larger charge storage capacity, and a second configuration in FIG. 13, in which the aerosol generating device 10 includes a smaller physical size.

[0178] Figures 14 to 18 show an aerosol generation device 210 according to a second embodiment of the present invention. The aerosol generation device 210 is similar to the aerosol generation device 10 of Figures 1 to 13, and like reference numerals are used to designate like parts.

[0179] The aerosol generation device 210 comprises a housing 212 comprising a first housing portion 214 and a second housing portion 216. The second housing portion 216 is configured for removable attachment to the first housing portion 214. A first electrical contact 52 is positioned on the first housing portion 214 and a second electrical contact 62 is positioned on the second housing portion 216. The first electrical contact 52 and the second electrical contact 62 are positioned to contact one another when the second housing portion 216 is attached to the first housing portion 214.

[0180] The aerosol generating device 210 also comprises a charging circuit 19 and a first power source 20 positioned within the second housing portion 216. The first power source 20 is a power source comprising a rechargeable battery. A charging electrical contact 49 in the form of a USB-C connector is included at an end of the second housing portion 216 and is configured to receive a supply of power from an external device. The charging circuit 19 is configured to control the supply of power received from the external device to recharge the first power source 20.

[0181] The first housing portion 214 defines a chamber 32 in the form of a cavity for receiving the aerosol-generating article 80 and an opening 34 located at an end of the cavity. The opening 34 is located at a first end of the first housing portion 214. When the aerosol-generating article is received within the cavity, the aerosol-generating article and the aerosol generating device 210 together form an aerosol generating system.

[0182] The aerosol generating device 210 further comprises an electric heater 22 and a controller 18 positioned within the first housing portion 214. The electric heater 22 comprises an induction coil wound around a cavity. The controller 18 is configured to control the supply of power from the first power source 20 to the electric heater 22 via the first electrical contact 52 and the second electrical contact 62 when the second housing portion 216 is attached to the first housing portion 214. In use, power supplied to the induction coil of the electric heater 22 generates a varying magnetic field that inductively heats a susceptor in an aerosol-generating article received within the cavity 32 to generate an aerosol.

[0183] The aerosol generating device 210 also includes a closure member 242 positioned at a first end of the first housing portion 214. The closure member 242 is slidable along the first end of the first housing portion 214 between a closed position in which the closure member 242 at least partially covers the opening 34 and an open position in which the closure member 242 does not cover the opening 34. A rim 244 extends around the periphery of the first end of the first housing portion 214 to protect the closure member 242. When the closure member 242 is in the open position, an aerosol-generating article may be inserted into the cavity 32. The closure member 242 includes a raised closure member gripping portion 248 to facilitate gripping the closure member 242 by a user.

[0184] The aerosol generating device 210 also includes an interface for attaching the second housing portion 216 to the first housing portion 214. The interface includes a slot 290 defined by a second end of the first housing portion 214 and configured to slidably receive a portion of the second housing portion 216. The second electrical contact 62 on the second housing portion 216 engages with the first electrical contact 52 on the first housing portion 214 when the second housing portion 216 is attached to the first housing portion 214.

[0185] The interface also includes a first pair of magnets 264 positioned on first housing portion 214 within slot 290 and a second pair of magnets 274 positioned on a first end of second housing portion 216. First pair of magnets 264 are positioned to engage second pair of magnets 274 when second housing portion 216 is attached to first housing portion 214 to retain second housing portion 216 within slot 290.

[0186] 16, the second housing portion 216 is slidably removable from the first housing portion 214. To remove the second housing portion 216 from the first housing portion 214, the release button 51 on the first housing portion 214 is pressed to disengage the latching elements from the second housing portion 216. Pressing the release button 51 allows the second housing portion 216 to slide relative to the first housing portion 214 until the second housing portion 216 is completely removed from the first housing portion 214. To attach the second housing portion 216 to the first housing portion 214, the sliding action is reversed until the latching elements engage the second housing portion 216.

[0187] 16 , removal of second housing portion 216 from first housing portion 214 exposes an LED charging indicator 73 provided on second housing portion 216. LED charging indicator 73 is configured to provide a user with a visual indication of the amount of charge stored within first power source 20.

[0188] Figure 17 shows a front view of the aerosol generation device 210 in a first configuration in which the second housing part 216 is attached to the first housing part 214. Figure 18 shows a front view of the aerosol generation device 210 in a second configuration in which the second housing part 216 is replaced by the third housing part 316. The aerosol generation device 210 is configured such that only one of the second housing part 216 and the third housing part 316 may be removably attached to the first housing part at a time.

[0189] The third housing part 316 is similar to the second housing part 216 and includes the same features as described with respect to the second housing part 216. The third housing part 316 differs from the second housing part 216 by the charge storage capacity of the power source and the physical size of the third housing part 316. In particular, the third housing part 316 includes a second power source having a smaller charge storage capacity than the first power source 20 of the second housing part 216. Thus, the second power source has a smaller physical size than the first power source 20, and as a result, the third housing part 316 has a smaller physical size than the second housing part 216. Advantageously, the second housing part 216 and the third housing part 116 allow a user to choose between a first configuration shown in FIG. 17, in which the aerosol generating device 210 includes a power source with a larger charge storage capacity, and a second configuration in FIG. 18, in which the aerosol generating device 210 includes a smaller physical size.

Claims

1. An aerosol generating device, comprising: A housing comprising a first housing part defining a chamber for receiving an aerosol forming substrate and a second housing part, wherein the second housing part is configured for removable attachment to the first housing part, the chamber defining a cavity for receiving an aerosol generating article, the first housing part defining an opening at an end of the cavity, the opening being positioned at a first end of the first housing part; An electric heater positioned within the first housing part; A power source positioned within the second housing part; A controller positioned within the first housing part, configured to control the supply of power from the power source to the electric heater when the second housing part is attached to the first housing part.

2. The aerosol generating device according to claim 1, wherein the housing part comprises an interface surface for attaching the second housing part to the first housing part.

3. The aerosol generating device according to claim 2, wherein the interface surface comprises a slot arranged to receive at least a part of the first housing part or at least a part of the second housing part.

4. The aerosol generating device according to claim 2, wherein the interface surface comprises a latch element arranged to removably attach and hold the second housing part to the first housing part, and optionally further comprises a release element arranged to disengage the latch element.

5. The aerosol generating device according to claim 2, wherein the interface surface comprises a first magnetic element on the first housing part and a second magnetic element on the second housing part, the second magnetic element being arranged to engage the first magnetic element when the second housing part is attached to the first housing part.

6. The aerosol generating device according to any one of claims 1 to 5, wherein the first housing part comprises a second end opposite to the first end, and the second housing part is configured for removable attachment to the second end of the first housing part.

7. The aerosol generating device according to any one of claims 1 to 5, wherein the first housing part comprises a second end opposite to the first end and at least one side wall extending between the first end and the second end, and the second housing part is configured for removable attachment to the at least one side wall.

8. The aerosol generating device according to any one of claims 1 to 5, further comprising a first electrical contact positioned on the first housing part and a second electrical contact positioned on the second housing part, wherein the second electrical contact is configured to engage with the first electrical contact when the second housing part is attached to the first housing part, and optionally, the controller is configured to control the supply of power from the power source to the electric heater via the first electrical contact and the second electrical contact when the second housing part is attached to the first housing part.

9. The aerosol generating device according to any one of claims 1 to 5, wherein the power source is a rechargeable power source, and the aerosol generating device comprises a charging circuit positioned within the second housing part and configured to control the supply of power received from an external device for recharging the power source.

10. The aerosol generating device according to any one of claims 1 to 5, further comprising a third housing part configured for removable attachment to the first housing part and a second power source positioned within the third housing part, wherein the power source is a first power source.

11. The aerosol generating device according to claim 10 in combination with claim 2, wherein the interface surface is configured to attach the third housing part to the first housing part.

12. The aerosol generating device according to claim 10, wherein the first power source has a first charge storage capacity, the second power source has a second charge storage capacity, and the first charge storage capacity is different from the second charge storage capacity.

13. The ratio of the first charge storage capacity to the second charge storage capacity is between 1.5 and 3, optionally between 1.5 and 2.5, optionally between 1.7 and 2.3, the aerosol generating device according to claim 12.

14. The aerosol generating device according to claim 10, wherein the second housing portion has a size different from that of the third housing portion.

Images