WO2020193177A1

WO2020193177A1 - A smoking substitute system

Info

Publication number: WO2020193177A1
Application number: PCT/EP2020/056776
Authority: WO
Inventors: Kate FERRIE; Ross Shenton; Chris Lord; Pete LOMAS; Nikhil Aggarwal; Samantha MURRAY; Tom Sudlow
Original assignee: Nerudia Limited
Priority date: 2019-03-22
Filing date: 2020-03-13
Publication date: 2020-10-01
Also published as: TW202042682A; EP3941255A1

Abstract

A smoking substitute device (201) comprising a heater connected to a main body (209) of the device. The device includes a cap (210) covering at least a portion of the heater. The cap is releasably engaged with a main body of the device. The cap is configured to be released from engagement with the main body of the device using a removal key (235).

Description

A SMOKING SUBSTITUTE SYSTEM

TECHNICAL FIELD

[0001] The present invention relates to a smoking substitute system and particularly, although not exclusively, to a smoking substitute device, of a smoking substitute system, with a safety feature. The invention also relates to a smoking substitute system comprising a smoking substitute device and a tool for the device. The present invention also relates to a smoking substitute system and particularly, although not exclusively, to a smoking substitute system comprising a device, an aerosol-forming article and a tool.

BACKGROUND

[0002] The smoking of tobacco is generally considered to expose a smoker to potentially harmful substances. It is generally thought that a significant amount of the potentially harmful substances are generated through the heat caused by the burning and/or combustion of the tobacco and the constituents of the burnt tobacco in the tobacco smoke itself.

[0003] Conventional combustible smoking articles, such as cigarettes, typically comprise a cylindrical rod of tobacco comprising shreds of tobacco which is surrounded by a wrapper, and usually also a cylindrical filter axially aligned in an abutting relationship with the wrapped tobacco rod. The filter typically comprises a filtration material which is circumscribed by a plug wrap. The wrapped tobacco rod and the filter are joined together by a wrapped band of tipping paper that circumscribes the entire length of the filter and an adjacent portion of the wrapped tobacco rod. A conventional cigarette of this type is used by lighting the end opposite to the filter, and burning the tobacco rod. The smoker receives mainstream smoke into their mouth by drawing on the mouth end or filter end of the cigarette.

[0004] Combustion of organic material such as tobacco is known to produce tar and other potentially harmful by-products. There have been proposed various smoking substitute systems (or“substitute smoking systems”) in order to avoid the smoking of tobacco.

[0005] Such smoking substitute systems can form part of nicotine replacement therapies aimed at people who wish to stop smoking and overcome a dependence on nicotine.

[0006] Smoking substitute systems include electronic systems that permit a user to simulate the act of smoking by producing an aerosol (also referred to as a“vapour”) that is drawn into the lungs through the mouth (inhaled) and then exhaled. The inhaled aerosol typically bears nicotine and/or flavourings without, or with fewer of, the odour and health risks associated with traditional smoking.

[0007] In general, smoking substitute systems are intended to provide a substitute for the rituals of smoking, whilst providing the user with a similar experience and satisfaction to those experienced with traditional smoking and with combustible tobacco products. Some smoking substitute systems use smoking substitute articles (also referred to as a“consumables”) that are designed to resemble a traditional cigarette and are cylindrical in form with a mouthpiece at one end.

[0008] The popularity and use of smoking substitute systems has grown rapidly in the past few years. Although originally marketed as an aid to assist habitual smokers wishing to quit tobacco smoking, consumers are increasingly viewing smoking substitute systems as desirable lifestyle accessories.

[0009] There are a number of different categories of smoking substitute systems, each utilising a different smoking substitute approach.

[0010] One approach for a smoking substitute system is the so-called Heated Tobacco (“HT”) approach in which tobacco (rather than an“e-liquid”) is heated or warmed to release vapour. HT is also known as "heat not burn" (“HNB”). The tobacco may be leaf tobacco or reconstituted tobacco. The vapour may contain nicotine and/or flavourings. In the HT approach the intention is that the tobacco is heated but not burned, i.e. the tobacco does not undergo combustion.

[0011] A typical HT smoking substitute system may include a device and a consumable. The consumable may include the tobacco material. The device and consumable may be configured to be physically coupled together. In use, heat may be imparted to the tobacco material by a heating element of the device, wherein airflow through the tobacco material causes components in the tobacco material to be released as vapour. A vapour may also be formed from a carrier in the tobacco material (this carrier may for example include propylene glycol and/or vegetable glycerine) and additionally volatile compounds released from the tobacco. The released vapour may be entrained in the airflow drawn through the tobacco.

[0012] As the vapour passes through the consumable (entrained in the airflow) from the location of vaporisation to an outlet of the consumable (e.g. a mouthpiece), the vapour cools and condenses to form an aerosol for inhalation by the user. The aerosol will normally contain the volatile compounds.

[0013] In HT smoking substitute systems, heating as opposed to burning the tobacco material is believed to cause fewer, or smaller quantities, of the more harmful compounds ordinarily produced during smoking. Consequently, the HT approach may reduce the odour and/or health risks that can arise through the burning, combustion and pyrolytic degradation of tobacco.

[0014] A limitation associated with existing HT smoking substitute systems is that, due to the physical contact between the heating element and tobacco material, residue from the heating of tobacco may form on the heating element with every use of the device, e.g. loose tobacco material accumulates or sticks to the surface of the heating element of the device. Such residue formation and build-up may result in undesired burnt smell when using the device, and therefore negatively affecting the user experience. Therefore, currently available HT smoking systems often require the user to remove a cap from the device to expose the heating element before carrying out a cleaning procedure with a dedicated cleaning tool or an alcohol swab. For example, the user may require to clean the heating element with the use of a brush or a disposable solvent swap. However, currently available HT systems may only provide access to the heating element through an opening towards at the end of the cavity. Further, the user may require removing a cap covering said opening to gain access to the heating element prior to cleaning. Such arrangement may be inconvenient. In some currently available HT devices the cap may be easily removed from the device and thus present a risk by exposing the heating element inadvertently.

Therefore, some users may only clean the heating element once the device has consumed a given number of consumables, e.g. 20 consumables, when the residue built up becomes detrimental to the experience, e.g. when a burnt taste is perceivable.

[0015] There may be a need for improved design of smoking substitute systems, in particular HT smoking substitute systems, to enhance the user experience and improve the function of the HT smoking substitute system and provide the HT smoking substitute system with enhanced safety feature.

[0016] The present disclosure has been devised in the light of the above considerations.

SUMMARY OF THE INVENTION

[0017] At its most general, the present invention relates to a smoking substitute kit which provides a secondary safety feature.

[0018] Also in a general sense, the present invention relates to smoking substitute system with a smoking substitute device having a cap movable between two positions to selectively conceal or expose a heating element of the smoking substitute device. This may allow the user to physically access and clean the heating element in a more convenient manner, and thereby facilitate a more frequent cleaning routine. The present invention also relates to a tool for removing the cap form the device, and thereby preventing inadvertent removal of the cap. The tool may further comprises a cleaning means to conveniently allow the user to clean the heating element once the cap is removed by the tool.

[0019] At its most general, another aspect of the present invention relates to a tool for a smoking substitute system. Another aspect of the present invention relates to a tool for removing a cap of a smoking substitute device. Therefore, the smoking substitute device may be configured in that the cap cannot be removed by hand but by the tool, and thereby advantageously it may reduce the risk of inadvertently exposing the heating element. Furthermore, the tool may comprise a cover that is configured to cover a cap removal portion extending from a main body of the tool. In use, the cover may be arranged such that it does not rotate relatively with the main body. The tool may further comprise a cleaning portion extending from the main body opposite the cap removal portion. Therefore

advantageously, a user may be able to clean a heating element of the device, via a rotating motion, by rotating the cover when it is engaged with the device.

[0020] In another general sense, the present invention relates to a tool for removing a cap of a smoking substitute device. Therefore, the smoking substitute device may be configured in that the cap cannot be removed by hand but by the tool, and thereby advantageously it may reduce the risk of inadvertently exposing the heating element. Furthermore, the tool may comprise a cover that is configured to cover a cap removal portion extending from a main body of the tool. In use, the cover may be arranged such that it does not rotate relatively with the main body. The tool may further comprise a cleaning portion extending from the main body opposite the cap removal portion. Therefore advantageously, a user may be able to clean a heating element of the device, via a rotating motion, by rotating the cover when it is engaged with the device.

[0021] According to a first aspect there is provided a smoking substitute device comprising: a heater connected to a main body of the device; the device further including a cap covering at least a portion of the heater, wherein the cap is releaseably engaged with a main body of the device, and wherein the cap is configured to be released from engagement with the main body of the device using a removal key.

[0022] By providing a device comprising a safety feature i.e. a removal key the device may be able to provide less access to the heating element by a child thereby saving him as well as the hearing element from damage.

[0023] The present smoking substitute device provides a safety feature because the cap cannot be separated from the body of the device without using a separate element i.e. a removal key. It ensures that if heating element is on or cooling down, it is not exposed to outside environment and does not come in contact with a human being.

[0024] According to a second aspect of the present invention, there is provided a smoking substitute device having a body, a heating element extending from the body and a cap removably attached to the body. The cap is movable between a first position and a second position along a longitudinal axis of the body. In the first position the heating element is concealed in the cap and in the second position the heating element is at least partially exposed.

[0025] For example, in the first position, the cap may cover a window or an opening at the sidewall of the body that extends into a transverse cavity containing the heating element, and thereby conceals the heating element. In the second positon, the cap is moved or slide to a location where it may no longer cover the opening, and thereby the heating element may be at least partially exposed through the opening. More specifically, the opening may be located adjacent to exposed portion of the heating element and therefore it may provide physical access to said exposed portion of the heating element.

[0026] By providing a device comprising a cap movable between two positions, the heating element may be cleaned in a more convenient manner. For example, when the cap is moved to the second position, the heating element may be exposed through a window or opening from the side of the device, as such said heating element may be visually inspected or cleaned through said opening. Advantageously, the user may thereby carry out a brief cleaning at the heating element without requiring a dedicated cleaning tool. For example, the user may simply blow through the opening or physically shaking, tilting and/or tapping the device to dislodge loose debris that are formed on the heating element. The user may also physically clean the exposed portion of the heating element, e.g. a base of the heating element, with the use of a tool, e.g. a brush. Further, the smoking substitute as disclosed herein may prolong the usability of the device before it requires deep cleaning or other such maintenance. [0027] According to a third aspect of the present invention, there is provided a tool for a HNB device. The HNB device comprises a main body and a cap, where the cap is defined with an opening and is removably attached to the main body. Further, the tool is adapted to disengage the cap and the main body. The tool may be insertable into the opening in the cap, in at least one defined orientation.

[0028] According to a fourth aspect of the present invention, there is provided a tool for a HNB device. The HNB device comprises a main body and a cap, where the cap is removably attached to the main body. Further, the tool is adapted to disengage the cap and the main body.

[0029] By providing the tool, the cap of the device may be operable to open (e.g. expose) interior of the main body of the HNB device.

[0030] According to a fifth aspect of the present invention, there is provided a tool for a heat-not-burn device, the heat-not-burn device including a cap that is releasably connected to a main body of the device, wherein the tool is configured to disengage the cap from the main body.

[0031] By providing the tool according to the fourth or fifth aspects, a safer device is provided because the cap may not be removed without the key.

[0032] According to a sixth aspect of the present invention, there is provided a tool for an HNB device.

The HNB device comprises a main body and a cap, where the cap is removably attached to the main body. The tool is adapted to disengage the cap and the main body. Furthermore, the tool is adapted for indicating an orientation of the tool relative to the HNB device.

[0033] By providing the tool for the HNB device, comprising a means for visually indicating an orientation of the tool, relative to the HNB device, may facilitate in precise positioning and engagement of the tool with the HNB device, and thereby facilitating easy disengaging of the cap and the main body of the HNB device.

[0034] According to a seventh aspect of the present invention, there is provided a tool for an HNB device. The HNB device comprises a main body and a cap, where the cap is removably attached to the main body. Further, the tool is adapted to disengage the cap and the main body. Furthermore, the tool is adapted for performing a cleaning operation of the HNB device.

[0035] By providing a tool according to the seventh aspect, removal of debris in a cavity and debris deposited on the heating element is facilitated. By providing a tool, cap and the body of the device may be disengaged, and the device may be cleaned. This feature of the tool facilitates in using a same (i.e. a single tool) for both disengaging and cleaning operations.

[0036] According to an eighth aspect of the present invention, there is provided a tool for removing a cap of a smoking substitute device, the tool comprising a cover, a main body; wherein the main body and the cover are configured to engage with each other to prevent relative rotation there between.

[0037] The cover may engage with the main body using any suitable engagement means that prevents relative rotation between the two. [0038] The phrase“main body” may refer a portion of the tool which is configured to engage with the cover. For example, it may comprise a collar and a connector of the tool.

[0039] By providing a tool that comprises a cover configured to engage with a main body in a manner where relative rotation is prevented, the main body may advantageously be rotated about its longitudinal axis by rotating the cover. For example, this may allow accessories such as a cleaning portion, e.g. a brush, or a cap removal portion that is attached onto the main body to be used in a rotational manner by gripping onto the cover without having to grip onto a part of the main body. That is, the cover forms an extension to the main body.

[0040] The term“tool” is intended to refer to an implement, which may be used to disengage the cap and the main body of the HNB device, and optionally for performing a cleaning operation of the HNB device.

[0041] Optional features will now be set out. These are applicable singly or in any combination with any aspect.

[0042] Optionally, the main body comprises a cap removal portion extending from a first end and a cleaning portion extending from a second end opposite to the first end, wherein the cover is configured to engage with the first end of the main body. For example, said cleaning portion may be used to clean the surface of a heating element of the device so as to scrape or brush the debris off said heating element. Advantageously, the cover may provide a surface for a user to grip onto during the cleaning process, without having to grip onto the cap removal portion. During use, it is critical that all of the rotational movements are transmitted from the cover to the cleaning tool, and therefore such arrangement may provide efficient cleaning at the surface of the heating element.

[0043] Optionally, the cover comprises a cavity configured to receive the cap removal portion; the said cavity comprises an opening. For example, the main body may comprise a connector and a collar movable relative to the connector, wherein the cleaning portion may extend from a second end of connector and the cap removal portion may extend from a first end of the connector. The cover may be configured to engage with the collar at the first end of the connector, so as to receive the cap removal extending therefrom.

[0044] Optionally, the first end of the main body comprises a flange portion, said flange portion is configured to engage with the opening of the cover. That is, the flange portion may form on the collar.

[0045] Optionally, one of the flange portion and the opening comprises one or more notches configured to engage with one or more protrusions formed on the other one of flange portion and the opening, so as to prevent relation rotation between the cover and the main body when they are engaged with each other.

[0046] Optionally, the flange portion comprises one or more notches configured to engage with one or more protrusions formed at an opening of cover, so as to prevent relation rotation between the cover and the main body when they are engaged with each other.

[0047] For example, the one or more protrusions and notches may form along the longitudinal axis of respective opening and flange, and therefore the cover may engage with the main body by pushing the flange into the opening along the longitudinal axis of the main body. The notch may also be referred to as a groove or depression. When the cover is engaged with the main body, each of the one or more protrusions is received in respective notch and abut a sidewall of the said notch, thereby prevents relative rotation.

[0048] Optionally, there is more than one pair notch and corresponding protrusion between the flange and opening of the cover for engaging the main body and the cover. Advantageously, this may allow a more robust engagement between the cover and the main body. Preferably, two notches are formed on the flange each configured to engage with a corresponding protrusion at the opening of the cover.

[0049] Optionally, the one or more protrusions formed at the opening of the cover extends longitudinally along a wall of the cavity. For example, the one or more protrusions extend along the internal surface of a side wall of the cavity.

[0050] Optionally, the cover and the main body in configured to engage with each other via a push fit mechanism or a bump fit mechanism. Optionally, the bump fit mechanism or the push fit mechanism comprises a non-circular cross sectional profile. Said bump fit mechanism or the push fit mechanism may be provided as an alternative, or additional, means to the notch/protrusion arrangement between the cover and the main body. Advantageously, such arrangement provides a secure engagement between the cover and the main body, as well as preventing relative rotation between the two.

[0051] Optionally, the tool further comprises a second cover configured to engage with the second end of the main body, wherein the second cover comprises a second cavity for receiving the cleaning portion.

[0052] For example, the second cover may engage with the second end of the main body with any suitable mechanism, for example a screw tread connection that engages by relative rotation between the two, or by push fit/bump fit mechanism or protrusion/notch arrangement as described to prevent relative rotation between the two.

[0053] Optionally, the cleaning portion comprises one or more elongate elements extending from the main body, whereby rotating the cover about the longitudinal axis of the tool causes the one or more elongate elements to rotate about a heating element of the smoking substitute device when the tool is engaged with said smoking substitute device. For example, each of the one or more elongate elements may comprise a brush. The brush may comprise cleaning bristles that is configured to clean the heating element of the device by rotating around said heating element. There, the present invention may ensure that the cleaning bristles can be rotated about the heating element by twisting the cover that is engaged with the main body.

[0054] Optionally, the cap removal portion comprises a central rod and at least one unlocking arm extending along a longitudinal axis of the central rod, said at least one unlocking arm having an unlocking protrusion disposed thereon for engaging with a corresponding locking protrusion formed on the cap of device.

[0055] Optionally, the main body comprises a collar around the central rod, the collar being movable between an insertion position and an unlocking position, wherein in the insertion position the at least one unlocking arm is allowed to flex and in the unlocking position the central rod prevents the flexing of the unlocking arm.

[0056] Optionally, the flange comprises one or more grooves around its periphery which are configured to receive and engage with the protrusion of the cover thereby preventing the relation rotation there between.

[0057] Optionally, a push fit or a bump fit is provided between the grooves and the protrusions when the protrusions are fully inserted into the grooves

[0058] Optionally, the brush may have an elongate surface having substantially circular cross section with circular tip.

[0059] Optionally, cleaning bristles formed the cleaning portion may be rubbed on the outer surface of a heating element to clean or scrap off any debris or residuals from the heating element.

[0060] Optionally, the cleaning portion and the cap removal portion is covered by respective second cover and cover.

[0061] Optionally, the tool may comprise a rigid member and a movable member. The rigid member may include a plurality of flexible engaging arms, which may be operable between a first condition and a second condition. Also, the movable member may be configured to slide coaxially within the rigid member between a first position and a second position.

[0062] Advantageously, operation of the movable member between the first position and the second position may translate the plurality of flexible engaging arms between the first condition and the second condition, whereby at the second condition of the flexible engaging arms, the cap may be disengaged from the body. This operational movement of the movable member and the rigid member may allow disengagement of the cap and the body, to allow cleaning of the foreign particles like debris from the main body and the cap.

[0063] Optionally, each of the plurality of flexible engaging arms may include a protruding tab. The protruding tab may be configured to extend outwardly from an external surface of each of the plurality of flexible engaging arms, to engage with the main body of the device. By configuring the protruding tabs it may be possible to operate a hook of the at least one flexure bearing of the main body with ease.

[0064] Conveniently, the movable member may be operated from the first position to the second position that may translate the plurality

[0065] Optionally, the tool may comprise a locating tab, which may laterally extend from an external surface to align the tool in the at least one defined orientation. The opening in the cap may be defined with at least one notch, where the locating tab may be aligned with the at least one notch in the at least one defined orientation. Due to this, the tool and the cap and/or the device may be oriented in one common orientation. This way, forceful insertion the tool into the cap may be avoided, thereby avoiding causing of damage to the tool and/or the cap. [0066] Optionally, the tool may comprise a cap removal portion and a cleaning portion.

[0067] Advantageously, the cap removal portion may comprise a rigid member and a movable member.

[0068] Optionally, the rigid member comprises a plurality of flexible engaging arms, wherein the plurality of flexible engaging arms are operable between a first condition and a second condition. By operating the flexible engaging arms, the cap and the body may be disengaged.

[0069] Advantageously, the cap removal portion and the cleaning portion may be separated by a base element.

[0070] Conveniently, the cap removal portion and the cleaning portion extend from either sides of the base element.

[0071] Optionally, the cap removal portion and the cleaning portion extend from a base element in a substantially opposite direction to each other. This configuration of the tool facilitates multipurpose use for the tool. In other words, same tool may be used for cap removal and the cleaning of the device.

[0072] Conveniently, the movable member is configured to slide coaxially within the rigid member, between a first position and a second position. This movement of the movable member between the first position and the second position, facilitates in disengaging the cap and the body.

[0073] Conveniently, the cleaning portion, comprises one or more cleaning elements, adapted to clean the HNB device.

[0074] Optionally, the one or more cleaning elements may be at least one of brushes or bristles. The cleaning elements facilitate removing debris deposited on the heating element and the body.

[0075] Advantageously, the cap removal portion and the cleaning portion may be enclosed by at least one enclosure. The enclosure provides provision for handling the tool during operation of the tool.

[0076] Conveniently, the enclosure is engaged with the tool by one of a threaded connection, a snap fit connection and an interference fit connection. This configuration of the enclosure facilitates in easy disengagement of the enclosure to expose either of the cap removal portion and the cleaning portion of the tool.

[0077] Conveniently, the tool includes a rigid member and a movable member. The rigid member may include a plurality of flexible engaging arms. The plurality of flexible engaging arms may be operable between a first condition and a second condition.

[0078] Advantageously, the movable member may be configured to slide coaxially within the rigid member, between a first position and the second position. This operational movement of the movable member within the rigid member may allow disengagement of the cap and the body, for removing foreign particles, like debris, from the main body and the cap.

[0079] Conveniently, the movable member comprises a plunger and a recess extending from one end of the plunger. [0080] Advantageously, the tool may be received by a cavity defined in the device, the plunger may contact a portion of the inner wall of the cavity and trace the same for removing debris deposited on the inner wall of the cavity.

[0081] Advantageously, the recess may be adapted to receive a heating element of the HNB device, and remove debris deposited on the heating element. Removing the debris deposited on the heating element may facilitate in effective heat dissipation of the heating element.

[0082] According to an ninth aspect of the present invention, there is provided an HNB device, capable of being operable by a tool. The HNB device comprises a cap and a main body, where the cap is removably attached to the main body.

[0083] Conveniently, the cap and the main body of the device may be disengaged by the tool.

[0084] Optionally, the HNB device may be cleaned by the tool.

[0085] The locating tab of the tool may be configured to extend on at least one flexible engaging arm of the plurality of flexible engaging arms.

[0086] Conveniently, the complete alignment of the locating tab with the at least one notch may define a dead stop for the tool with respect to the device.

[0087] In some embodiments, the cap is releaseably secured to the main body of the device by a retaining means.

[0088] In some embodiments, the retaining means comprises: at least one flexible locking arm extending from the main body; and a locking protrusion disposed on each of the at least one locking arm, the locking protrusion configured to extend into a corresponding slot located in the cap.

[0089] In some embodiments, each locking protrusion includes a hooked end of the corresponding locking arm.

[0090] In some embodiments, the locking protrusion abuts a first end of the corresponding slot to limit an extent of movement of the cap relative to the main body, and to thereby prevent removal of the cap from the main body.

[0091] In some embodiments, the cap includes a cavity for receiving at least a portion of a smoking substitute consumable.

[0092] In some embodiments, the removal key is sized so that at least a portion of the removal key is received in the cavity to release the cap from the main body.

[0093] In some embodiments, the slot is formed through a wall of the cavity.

[0094] Optionally, the tool comprises a static member and a movable member.

[0095] Optionally, the static member comprises a collar and a plurality of flexible engaging arms extending from the collar, and wherein the plurality of flexible engaging arms are moveable between a contracted arm position and a separated arm position. [0096] Optionally, the plurality of flexible engaging arms are insertable into a cavity formed in the cap, through an opening of the cavity.

[0097] Optionally, the movable member comprises a plunger, configured to slide co-axially within the collar, between a first plunger positon and a second plunger position.

[0098] Optionally, the plunger in the second plunger position maintains the flexible arms in the separated arm position.

[0099] Optionally, at least a portion of the plunger is configured to contact the cavity, to thereby scrape debris deposited on a wall of cavity, during movement from the first plunger position to the second plunger position.

[0100] Optionally, wherein the plurality of flexible engaging arms engages with at least one moveable hinge in the main body of the device, on insertion into the cavity of the cap, to thereby disengage the cap.

[0101] According to a tenth aspect there is provided, a smoking substitute system, comprising a heat not burn device; and a tool according to the third, fourth, fifth, sixth, seventh and eighth aspects.

[0102] Optionally, the smoking substitute system further comprises a heat not burn consumable, wherein at least a portion of the consumable is insertable into the cap of the device.

[0103] According to a eleventh aspect, there is provided a heat not burn device comprising: a main body; and a cap releasably connected to the main body, wherein the cap and the main body are configured to be mutually disengaged by a tool.

[0104] According to a twelfth aspect, there is provided a smoking substitute kit including a substitute smoking device according to the first aspect, further including the removal key.

[0105] In some embodiments, the removal key is shaped to disengage the retaining means to thereby permit the disengagement of the cap from the main body.

[0106] In some embodiments, the removal key includes at least one projection, wherein each of the at least one projection intrudes into the corresponding slot to disengage the locking protrusion from the corresponding slot.

[0107] In some embodiments, the projection is located on an unlocking arm of the removal key.

[0108] in some embodiments, the removal key includes two or more locking arms.

[0109] In some embodiments, the removal key includes a separator to hold the locking arms in a mutually separated position to thereby disengage each corresponding locking protrusion from the corresponding slot.

[0110] In some embodiments, the separator is moveable relative to the locking arms.

[0111] According to a thirteenth aspect, there is provided a removal key for a smoking substitute device according to the first aspect. [0112] According to a fourteenth aspect, there is provided a removal key for a smoking substitute kit according to the twelfth aspect.

[0113] In some embodiments of any aspect, the smoking substitute device is a heat not burn device.

[0114] In some embodiments, the body includes a transverse cavity extending transverse to the longitudinal axis of the body. The transverse cavity may extend laterally and may be located in the body such that at least the base of the heating element is parallel to the transverse cavity.

[0115] In some embodiments, at least one locking arm extends from the body. The locking arms lock or retain the cap with the body. The locking arms are provided with a locking protrusion at a distal end. The locking protrusion extends transversely to the longitudinal axis of the body. The locking arms are positioned such that when the cap is mounted on the body, the locking arms engage the cap to retain the cap on the body.

[0116] In some embodiments, the removal key may be configured to displace the locking arms to enable separation of the cap from the body. In some embodiments, the removal key has at least one unlocking arm. The unlocking arms are adapted to engage the locking arms to displace the locking arms for separating the cap from the body. Each unlocking arm may be provided with an unlocking projection. The unlocking projection may extend in a direction transverse to the longitudinal axis of the unlocking arm.

The unlocking projections are adapted to engage the locking protrusions to displace the locking protrusions for releasing the cap from the body.

[0117] In some embodiments, the removal key includes separator. In some embodiments, the separator is a central rod. A collar may be positioned concentrically on the central rod. The collar may be placed movably on the central rod such that the collar moves relative to the central rod along a longitudinal axis of the central rod. The unlocking arms may extend from the collar along the longitudinal axis of the central rod. The collar may be movable on the central rod between an insertion portion and an unlocking position. In the insertion position, the central rod may be kept away from the unlocking protrusions and the unlocking arms may flex radially inwards relative to the longitudinal axis of the central rod. In the unlocking position, the central rod moves adjacent to the unlocking protrusions to prevent flexing of the unlocking arms in a direction radially inwards relative to the longitudinal axis of the central rod. The collar may be biased to move towards the insertion position using any suitable means such as a coil spring.

[0118] The removal key may be configured for insertion into the cavity. The unlocking protrusions are configured such that when the unlocking arms are inserted into the cavity, the unlocking arm displaces the locking arms to release engagement of the locking arms from the slots. The unlocking protrusions may have dimensions that interfere with the width of the cavity. In order to allow insertion of the unlocking arms in the cavity, in the insertion position, the central rod is away from the distal ends of the unlocking arms to allow the distal ends of the unlocking arms to flex radially inwards to enable insertion of the unlocking arms with the unlocking protrusions into the cavity. The flexing may be achieved when the unlocking protrusions abut and slide against an inner surface of cap defining the internal cavity. The unlocking protrusions, as shown in the embodiment illustrated, may be provided with tapered surfaces to guide the flexing movement of the unlocking arms in and out from the cavity and the slots.

[0119] In some embodiments, the removal key includes a first cover to cover the unlocking arms when not in use.

[0120] Optionally, the cap may be retainable on the body in the second position by a retaining means.

[0121] Optionally, the retaining means may be any suitable retaining means, for example interference fit or latch mechanism. Advantageously, said retaining means may allow the cap to be positioned and retained in the second position during visual inspection and/or cleaning, and may stop it from moving further along the longitudinal axis once it reaches the second position, thereby it may prevent the cap from being inadvertently removed from the body.

[0122] Optionally, the retaining means comprises at least one flexible locking arm extending from the body, and a locking protrusion disposed on the at least one locking arm. The locking protrusion may be configured to engage a slot defined in the cap to retain the cap on the body. Optionally, the locking protrusion may be retained in the slot when the cap moves between the first position and the second position. Advantageously, the locking protrusion may slide along the slot when the cap moves from the first position to the second position, and thereby prevents relative rotation between the cap and the body.

[0123] Optionally, the body defines a transverse cavity that opens through a first side wall of the body, the opening may be juxtaposed with a base of the heating element to at least partially expose the base of the heating element when the cap is in the second position. For example, the opening at the side wall of body leads to said transverse cavity. The transverse cavity may be juxtaposed lateral to the base of the heating element, or in other words, the transverse cavity may open in a direction orthogonal to the longitudinal axis of the body.

[0124] Optionally, the transverse cavity may extend from the first side wall of the body to a second side wall opposite to the first side wall. In other words, the transverse cavity may be a through hole extending through both the first side wall and the second side wall of the body. Advantageously, this may allow loose debris to be effectively discharged from the opening or through hole.

[0125] Optionally, the locking protrusion is configured to prevent separation of the cap from the device by abutting an end of the slot once the cap has moved to the second position, as such blocking further movement of the cap. In other words, the locking protrusion may prevent detachment of the cap by blocking movement of the cap by abutting a peripheral surface of the cap defining the slot when the cap is in the second position.

[0126] Optionally, the cap may define a cavity for receiving at least a portion of an aerosol-forming article. Optionally, the slot may be connected with or open to the cavity.

[0127] In a fifteenth aspect according to the present invention, there is provided a tool for separating the cap from the body of the smoking substitute device is disclosed. The tool may be used to separate or dislodge the cap from the device for a deep cleaning of the heating element. The tool has unlocking means at one end and a cleaning means at another end. The tool may provide for a compact and easy maintenance of the smoking substitute device of the smoking substitute system of the present disclosure.

[0128] The tool may have at least one unlocking arm and an unlocking protrusion disposed on the unlocking arm. The unlocking protrusion may be configured to displace a corresponding locking protrusion disposed on a locking arm extending from the body of the device to disengage the locking protrusion from a slot in the cap. Advantageously, the tool prevents the inadvertent removal of the cap from the body of the device.

[0129] Optionally, the tool further comprises a cleaning means for cleaning the heating element.

Advantageously, the cleaning means to conveniently allow the user to physically clean the heating element once the cap is removed by the tool, and thereby allowing the heating element to be better clean, e.g. to“deep clean” the heating element. Optionally, the cleaning means comprises at least one cleaning bristle. Advantageously, in use the bristle may scrape on the surface of the heating element, and thereby it may allow the heating element to be cleaned in a more efficient manner.

[0130] Optionally, the tool further comprises a central rod, the at least one unlocking arm extending along a longitudinal axis of the central rod in a first direction and the cleaning means extending in a second direction opposite to the first direction.

[0131] Optionally, the tool comprises a collar around the central rod having the unlocking arm extended in the first direction, the collar being movable between an insertion position and an unlocking position, wherein in the insertion position the at least one unlocking arm is allowed to flex and in the unlocking position the central rod prevents the flexing of the unlocking arm. The collar may comprise a ring shaped collar. The collar may be positioned concentrically on the central rod.

[0132] Optionally, the tool further comprises a first cover configured to cover the at least one unlocking arm and a second cover configured to cover the cleaning means.

[0133] Optionally, the tool has an external profile similar to that of an aerosol- forming article for a smoking substitute system.

[0134] Optionally, the tool may comprise a rigid member and a movable member.

[0135] Conveniently, the tool further comprises an element disposed in the rigid member. The element may extend from the rigid member, into a sliding path defined on the movable member.

[0136] Optionally, the element may facilitate in locking the movable member in a first position and a second position, relative to the rigid member.

[0137] Advantageously, the element is adapted for visually indicating the orientation of the tool relative to the HNB device.

[0138] Conveniently, the visual indication of the orientation of the tool assists a user in locating the tool in a correct position relative to the HNB device. [0139] Conveniently, the rigid member may comprise a plurality of flexible engaging arms, wherein the plurality of flexible engaging arms are operable between a first condition and a second condition. The operation of the flexible engaging arms to a second condition may facilitate in disengaging the cap and the body.

[0140] Advantageously, the movable member may be configured to slide coaxially within the rigid member, between a first position and a second position. This sliding movement of the movable member may facilitate in disengaging the cap and the main body.

[0141] Advantageously, the first position of the movable member, corresponds to a fully disengaged position of the tool and the second position corresponds to fully engaged position of the tool. The fully engaged position of the tool facilitates in disengaging the cap and the main body.

[0142] Conveniently, the movable member may be defined with a slot for receiving the element. The slot may facilitate in locking the movable member at the first position and the second position.

[0143] According to a sixteenth aspect of the present invention, there is provided a cap removal tool for removing the cap of a smoking substitute device, the tool comprising: a cap removal portion for engagement with the cap, the cap removal portion being movable between a first position and a second position relative to a handle portion of the tool.

[0144] Optionally, the handle portion comprises a cleaning portion.

[0145] Optionally, the handle portion includes a collar.

[0146] Optionally, the collar includes a grip portion allowing the user to grip the tool when moving the cap removal portion between the first position and the second position.

[0147] Optionally, the cleaning portion includes a cleaning cover.

[0148] Optionally, the cap removal portion includes a cap removal cover.

[0149] Optionally, the cap removal portion and the cleaning portion are located at opposing ends of the tool, wherein the tool is elongate.

[0150] Optionally, the collar is located between the cleaning portion and the cap removal portion.

[0151] Optionally, a width of the collar is different from a width of the cleaning portion.

[0152] Optionally, a width of the collar is different from a width of the cap removal portion.

[0153] Optionally, the collar includes the visual indicator for alignment of the cap removal portion with the cap.

[0154] Optionally, movement of the collar relative to the cap removal portion activates the cap removal mechanism.

[0155] Optionally, longitudinal movement of the collar relative to a cap removal end of the tool activates the cap removal mechanism. [0156] Optionally, the collar moves longitudinally on a central rod along a longitudinal axis of the central rod.

[0157] Optionally, locking arms extends from one end of the collar along the longitudinal axis of the central rod.

[0158] In some embodiments, the device has an elongate body which may also referred as“main body” or“body”. An end of the elongate body may be configured for engagement with an aerosol-forming article. For example, the body may be configured for engagement with a heated tobacco (HT) consumable (or heat-not-burn (HNB) consumable) The terms“heated tobacco” and“heat-not-burn” are used

interchangeably herein to describe a consumable that is of the type that is heated rather than combusted (or are used interchangeably to describe a device for use with such a consumable). The device may comprise a cavity that is configured for receipt of at least a portion of the consumable (i.e. for

engagement with the consumable). The aerosol-forming article may be of the type that comprises an aerosol former (e.g. carried by an aerosol-forming substrate).

[0159] The body may define a transverse cavity extending orthogonal to the longitudinal axis of the body. The transverse cavity may extend laterally and may be located on the body such that at least the base of the heating element is juxtaposed with the transverse cavity.

[0160] Further, at least one locking arm may extend from the body. The locking arms may lock or retain the cap with the body. The locking arms may be provided with a locking protrusion at a distal end. The locking protrusion may extend transversely to the longitudinal axis of the body. The locking arms may be positioned such that when the cap is mounted on the body, the locking arms may engage the cap to retain the cap on the body.

[0161] The cap may be provided with a slot extending along the longitudinal axis of the body (when the cap is retained on the body), and the locking protrusions may be configured to engage the slot. The slot may be elongated such that the cap may be moved or slide relative to the body along the longitudinal axis of the body. The locking protrusion may have an abutment surface to engage a peripheral surface of the cap that defines the slot to retain or lock the cap with the body.

[0162] The cap may be movable between a first position and a second position. When the cap is in the first position, the cap may conceal the heating element. When the cap is in the second position, the heating element may be at least partially exposed, e.g. through a window or opening at the side wall of the body. When the heating element is partially exposed, the heating element may be examined visually to ascertain if cleaning of the heating element is required. If required, when the cap is in the second position, the heating element may be at least partly cleaned by blowing air through the opening or simply shaking, tilting and or tapping the device gently to dislodge and remove the debris.

[0163] The smoking substitute system of the present disclosure may further include a tool for separation of the cap from the body. The tool may be configured to displace the locking arms to enable separation of the cap from the body. The tool may comprise at least one unlocking arm. The unlocking arms may be adapted to engage the locking arms to displace the locking arms for separating the cap from the body. [0164] Each unlocking arm may be provided with an unlocking protrusion. The unlocking protrusion may extend in a direction orthogonal to the longitudinal axis of the unlocking arm. The unlocking protrusions may be adapted to engage the locking protrusions to displace the locking protrusions for releasing the cap from the body.

[0165] The tool may further include a central rod. A collar may be positioned concentrically on the central rod. The collar may be placed movably on the rod such that the collar moves relative to the central rod along a longitudinal axis of the central rod. The unlocking arms may extend from the collar along the longitudinal axis of the central rod. The collar may be movable on the central rod between an insertion portion and an unlocking position. In the insertion position, the central rod may be kept away from the unlocking protrusions and the unlocking arms may flex radially inwards relative to the longitudinal axis of the central rod. In the unlocking position, the central rod may move adjacent to the unlocking protrusions to prevent flexing of the unlocking arms in a direction radially inwards relative to the longitudinal axis of the central rod. The collar may be biased to move towards the insertion position using any suitable means such as a coil spring.

[0166] The tool may be configured for insertion into the cavity. The unlocking protrusions may be configured such that when the unlocking arms are inserted into the cavity, the unlocking arm displaces the locking arms to release engagement of the locking arms from the slots. The unlocking protrusions may have dimensions that interfere with the width of the cavity. In order to allow insertion of the unlocking arms in the cavity, in the insertion position, the central rod may be spaced from the distal ends of the unlocking arms to allow the distal ends of the unlocking arms to flex radially inwards to enable insertion of the unlocking arms with the unlocking protrusions into the cavity. The flexing may be achieved when the unlocking protrusions abut and slide against an inner surface of cap defining the internal cavity. The unlocking protrusions, as shown in the embodiment illustrated, may be provided with tapered surfaces to guide the flexing movement of the unlocking arms in and out from the cavity and the slots.

[0167] The tool may further comprise a cleaning means for cleaning the heating element. The cleaning means may be in form of cleaning bristles. The cleaning bristles may be rubbed on the outer surface of the heating element to clean or scrap off any debris or residuals from the heating element.

[0168] The tool may include a first cover to cover the unlocking arms when not in use. Further, a second cover may be provided to cover the cleaning bristles when not in use.

[0169] The device may include a heater for heating the aerosol-forming article. The heater may comprise a heating element, which may be in the form of a rod that extends from the body of the device. The heating element may extend from the end of the body that is configured for engagement with the aerosolforming article.

[0170] The heater (and thus the heating element) may be rigidly mounted to the body. The heating element may be elongate so as to define a longitudinal axis and may, for example, have a transverse profile (i.e. transverse to a longitudinal axis of the heating element) that is substantially circular (i.e. the heating element may be generally cylindrical). Alternatively, the heating element may have a transverse profile that is rectangular (i.e. the heater may be a“blade heater”). The heating element may alternatively be in the shape of a tube (i.e. the heater may be a“tube heater”). The heating element may take other forms (e.g. the heating element may have an elliptical transverse profile). The shape and/or size (e.g. diameter) of the transverse profile of the heating element may be generally consistent for the entire length (or substantially the entire length) of the heating element.

[0171] The heating element may be between 15 mm and 25 mm long, e.g. between 18 mm and 20 mm long, e.g. around 19 mm long. The heating element may have a diameter of between 1 .5 mm and 2.5 mm, e.g. a diameter between 2 mm and 2.3 mm, e.g. a diameter of around 2.15 mm.

[0172] The heating element may be formed of ceramic. The heating element may comprise a core (e.g. a ceramic core) comprising AI203. The core of the heating element may have a diameter of 1 .8 mm to 2.1 mm, e.g. between 1 .9 mm and 2 mm. The heating element may comprise an outer layer (e.g. an outer ceramic layer) comprising AI203. The thickness of the outer layer may be between 160 pm and 220 pm, e.g. between 170 pm and 190 pm, e.g. around 180 pm. The heating element may comprise a heating track, which may extend longitudinally along the heating element. The heating track may be sandwiched between the outer layer and the core of the heating element. The heating track may comprise tungsten and/or rhenium. The heating track may have a thickness of around 20 pm.

[0173] The heating element may be located in the cavity (of the device), and may extend (e.g. along a longitudinal axis) from an internal base of the cavity towards an opening of the cavity. The length of the heating element (i.e. along the longitudinal axis of the heater) may be less than the depth of the cavity. Hence, the heating element may extend for only a portion of the length of the cavity. That is, the heating element may not extend through (or beyond) the opening of the cavity.

[0174] The heating element may be configured for insertion into an aerosol-forming article (e.g. a HT consumable) when an aerosol-forming article is received in the cavity. In that respect, a distal end (i.e. distal from a base of the heating element where it is mounted to the device) of the heating element may comprise a tapered portion, which may facilitate insertion of the heating element into the aerosol-forming article. The heating element may fully penetrate an aerosol-forming article when the aerosol-forming article is received in the cavity. That is, the entire length, or substantially the entire length, of the heating element may be received in the aerosol-forming article.

[0175] The heating element may have a length that is less than, or substantially the same as, an axial length of an aerosol-forming substrate forming part of an aerosol-forming article (e.g. a HT consumable). Thus, when such an aerosol-forming article is engaged with the device, the heating element may only penetrate the aerosol-forming substrate, rather than other components of the aerosol-forming article. The heating element may penetrate the aerosol-forming substrate for substantially the entire axial length of the aerosol forming-substrate of the aerosol-forming article. Thus, heat may be transferred from (e.g. an outer circumferential surface of) the heating element to the surrounding aerosol-forming substrate, when penetrated by the heating element. That is, heat may be transferred radially outwardly (in the case of a cylindrical heating element) or e.g. radially inwardly (in the case of a tube heater). [0176] Where the heater is a tube heater, the heating element of the tube heater may surround at least a portion of the cavity. When the portion of the aerosol-forming article is received in the cavity, the heating element may surround a portion of the aerosol-forming article (i.e. so as to heat that portion of the aerosol-forming article). In particular, the heating element may surround an aerosol forming substrate of the aerosol-forming article. That is, when an aerosol-forming article is engaged with the device, the aerosol forming substrate of the aerosol-forming article may be located adjacent an inner surface of the (tubular) heating element. When the heating element is activated, heat may be transferred radially inwardly from the inner surface of the heating element to heat the aerosol forming substrate.

[0177] The cavity may comprise a (e.g. circumferential) wall (or walls) and the (tubular) heating element may extend around at least a portion of the wall(s). In this way, the wall may be located between the inner surface of the heating element and an outer surface of the aerosol-forming article. The wall (or walls) of the cavity may be formed from a thermally conductive material (e.g. a metal) to allow heat conduction from the heating element to the aerosol-forming article. Thus, heat may be conducted from the heating element, through the cavity wall (or walls), to the aerosol-forming substrate of an aerosolforming article received in the cavity.

[0178] In some embodiments the device may comprise a cap disposed at the end of the body that is configured for engagement with an aerosol-forming article. Where the device comprises a heater having a heating element, the cap may at least partially enclose the heating element. The cap may be moveable between an open position in which access is provided to the heating element, and a closed position in which the cap at least partially encloses the heating element. The cap may be slideably engaged with the body of the device, and may be slideable between the open and closed positions.

[0179] The cap may define at least a portion of the cavity of the device. That is, the cavity may be fully defined by the cap, or each of the cap and body may define a portion of the cavity. Where the cap fully defines the cavity, the cap may comprise an aperture for receipt of the heating element into the cavity (when the cap is in the closed position). The cap may comprise an opening to the cavity. The opening may be configured for receipt of at least a portion of an aerosol-forming article. That is, an aerosolforming article may be inserted through the opening and into the cavity (so as to be engaged with the device).

[0180] The cap may be configured such that when an aerosol-forming article is engaged with the device (e.g. received in the cavity), only a portion of the aerosol-forming article is received in the cavity. That is, a portion of the aerosol-forming article (not received in the cavity) may protrude from (i.e. extend beyond) the opening. This (protruding) portion of the aerosol-forming article may be a terminal (e.g. mouth) end of the aerosol-forming article, which may be received in a user’s mouth for the purpose of inhaling aerosol formed by the device.

[0181] In some embodiments, the smoking substitute system may be provided with the tool for disengaging the cap and the body of the device. The tool may comprise a cap removable portion for disengaging the cap and the main body of the device. Further, a cleaning portion may also be provided for cleaning the device. The tool may be insertable into the cavity defined by the cap or the cap and the body of the device. The tool may be capable of operating between a first position and a second position, for disengaging the cap and the body, and cleaning the device.

[0182] The tool may be configured such that, when the tool is engaged with the device (e.g. received in the cavity), only a portion of the tool is received in the cavity. Further, a portion of the tool (not received by the cavity), may protrude from (i.e. extend beyond) the opening. The protruding portion of the tool may be defined with a handle, which may be used for the purpose of gripping and operating the tool, to disengage the cap and the body, and cleaning the device.

[0183] In one instance, when the cap removal portion is inserted into the cavity, the enclosure enclosing the cleaning portion may define a handle for operating the cap removal portion and when the cleaning portion is being engaged in the cavity, the enclosure enclosing the cap removal portion may define a handle for operating the cleaning portion of the tool.

[0184] The device may comprise a power source or may be connectable to a power source (e.g. a power source separate to the device). The power source may be electrically connectable to the heater. In that respect, altering (e.g. toggling) the electrical connection of the power source to the heater may affect a state of the heater. For example, toggling the electrical connection of the power source to the heater may toggle the heater between an on state and an off state. The power source may be a power store. For example, the power source may be a battery or rechargeable battery (e.g. a lithium ion battery).

[0185] The device may comprise an input connection (e.g. a USB port, Micro USB port, USB-C port, etc.). The input connection may be configured for connection to an external source of electrical power, such as a mains electrical supply outlet. The input connection may, in some cases, be used as a substitute for an internal power source (e.g. battery or rechargeable battery). That is, the input connection may be electrically connectable to the heater (for providing power to the heater). Hence, in some forms, the input connection may form at least part of the power source of the device.

[0186] Where the power source comprises a rechargeable power source (such as a rechargeable battery), the input connection may be used to charge and recharge the power source.

[0187] The device may comprise a user interface (Ul). In some embodiments the Ul may include input means to receive operative commands from the user. The input means of the Ul may allow the user to control at least one aspect of the operation of the device. In some embodiments the input means may comprise a power button to switch the device between an on state and an off state.

[0188] In some embodiments the Ul may additionally or alternatively comprise output means to convey information to the user. In some embodiments the output means may comprise a light to indicate a condition of the device (and/or the aerosol-forming article) to the user. The condition of the device (and/or aerosol-forming article) indicated to the user may comprise a condition indicative of the operation of the heater. For example, the condition may comprise whether the heater is in an off state or an on state. In some embodiments, the Ul unit may comprise at least one of a button, a display, a touchscreen, a switch, a light, and the like. For example, the output means may comprise one or more (e.g. two, three, four, etc.) light-emitting diodes (“LEDs”) that may be located on the body of the device.

[0189] The device may further comprise a puff sensor (e.g. airflow sensor), which form part of the input means of the Ul. The puff sensor may be configured to detect a user drawing on an end (i.e. a terminal (mouth) end) of the aerosol-forming article. The puff sensor may, for example, be a pressure sensor or a microphone. The puff sensor may be configured to produce a signal indicative of a puff state. The signal may be indicative of the user drawing (an aerosol from the aerosol-forming article) such that it is e.g. in the form of a binary signal. Alternatively or additionally, the signal may be indicative of a characteristic of the draw (e.g. a flow rate of the draw, length of time of the draw, etc).

[0190] The device may comprise a controller, or may be connectable to a controller that may be configured to control at least one function of the device. The controller may comprise a microcontroller that may e.g. be mounted on a printed circuit board (PCB). The controller may also comprise a memory, e.g. non-volatile memory. The memory may include instructions, which, when implemented, may cause the controller to perform certain tasks or steps of a method. Where the device comprises an input connection, the controller may be connected to the input connection.

[0191] The controller may be configured to control the operation of the heater (and e.g. the heating element). Thus, the controller may be configured to control vaporisation of an aerosol forming part of an aerosol-forming article engaged with the device. The controller may be configured to control the voltage applied by power source to the heater. For example, the controller may be configured to toggle between applying a full output voltage (of the power source) to the heater and applying no voltage to the heater. Alternatively or additionally, the control unit may implement a more complex heater control protocol.

[0192] The device may further comprise a voltage regulator to regulate the output voltage supplied by the power source to form a regulated voltage. The regulated voltage may subsequently be applied to the heater.

[0193] In some embodiments, where the device comprises a Ul, the controller may be operatively connected to one or more components of the Ul. The controller may be configured to receive command signals from an input means of the Ul. The controller may be configured to control the heater in response to the command signals. For example, the controller may be configured to receive“on” and“off command signals from the Ul and, in response, may control the heater so as to be in a corresponding on or off state.

[0194] The controller may be configured to send output signals to a component of the Ul. The Ul may be configured to convey information to a user, via an output means, in response to such output signals (received from the controller). For example, where the device comprises one or more LEDs, the LEDs may be operatively connected to the controller. Hence, the controller may configured to control the illumination of the LEDs (e.g. in response to an output signal). For example, the controller may be configured to control the illumination of the LEDs according to (e.g. an on or off) state of the heater. [0195] Where the device comprises a sensor (e.g. a puff/airflow sensor), the controller may be operatively connected to the sensor. The controller may be configured to receive a signal from the sensor (e.g. indicative of a condition of the device and/or engaged aerosol-forming article). The controller may be configured to control the heater, or an aspect of the output means, based on the signal from the sensor.

[0196] The device may comprise a wireless interface configured to communicate wirelessly (e.g. via Bluetooth (e.g. a Bluetooth low-energy connection) or WiFi) with an external device. Similarly, the input connection may be configured for wired connection to an external device so as to provide communication between the device and the external device.

[0197] The external device may be a mobile device. For example, the external device may be a smart phone, tablet, smart watch, or smart car. An application (e.g. app) may be installed on the external device (e.g. mobile device). The application may facilitate communication between the device and the external device via the wired or wireless connection.

[0198] The wireless or wired interface may be configured to transfer signals between the external device and the controller of the device. In this respect, the controller may control an aspect of the device in response to a signal received from an external device. Alternatively or additionally, an external device may respond to a signal received from the device (e.g. from the controller of the device).

[0199] In a seventeenth aspect, there is provided a system (e.g. a smoking substitute system) comprising a device or kit according to the first, second, eighth or twelfth aspects and an aerosol-forming article. In an eighteenth aspect, there is provided a system (e.g. a smoking substitute system) comprising a tool according to the third, fourth, fifth, sixth, seventh, eighth or fifteenth aspects along with a device and an aerosol-forming article. The aerosol-forming article may comprise an aerosol-forming substrate at an upstream end of the aerosol-forming article. The article may be in the form of a smoking substitute article, e.g. heated tobacco (HT) consumable (also known as a heat-not-burn (HNB) consumable).

[0200] The system may include a device which may include the main body and the cap, where the cap may be removably attached to the body. Further, the system may include the tool, as provided in the first aspect, which may be adapted for disengaging the cap and the main body. The tool may be adapted for insertion into the opening of the cap, in at least one defined orientation. Further, the plurality of flexible engaging arms of the tool may be insertable into a cavity defined in the cap in at least one defined orientation, to engage with at least one flexure bearing defined in the main body of the HNB device. The movable member, of the tool, on operation from the first position to the second position, may be configured to translate the plurality of flexible engaging arms to the second condition, for displacing the at least one flexure bearing of the HNB device to disengage the cap and the main body. The hook of the at least one flexure bearing may generally be referred to as a locking element that engages and disengages with the cap, when using the tool for the HNB device described herein.

[0201] Optionally, the at least one flexure bearing may be moved from a lock position, where it is engaged with the cap to a un-lock position where a hook of the at least one flexure bearing is moved out of a slit defined in the cavity of the cap to disengage the cap and the main body. This ensures safe disengagement of the cap and the main body.

[0202] The tool or at least the portion of the tool may be insertable into the cavity, only upon removal (e.g. dislodging or disengaging) of the aerosol-forming substrate or the portion of the aerosol-forming substrate accommodated within the cavity, to render the cavity empty. The empty cavity may provide sufficient volume for the tool or at least portion of the tool to be accommodated, whereby operation of the tool may then be uninterrupted for disengaging the cap and the body.

[0203] The device may include the main body and the cap, where the cap may be releasably attached to the body. Further, the tool, as provided in the first aspect, included in the system, may be configured to disengage the cap from the main body. The tool may include a rigid member, which may be configured with a collar and a plurality of flexible engaging arms extending from the collar. The plurality of flexible engaging arms may be operable between a first condition and a second condition. Further, the tool may also include a movable member, which may be coaxial with the rigid member. The movable member may be operable between a first position and a second position that may deform the plurality of flexible engaging arms between the first contracted position and the second separated position.

[0204] Optionally, an end of each of the plurality of flexible engaging arms may define a clearance of 0.5mm to 1 5mm with the rigid base region of a cavity defined by the cap, when the tool may be fully inserted into the device

[0205] The tool or at least the portion of the tool may be insertable into the cavity, only upon dislodging of the aerosol-forming substrate or the portion of the aerosol-forming substrate accommodated within the cavity. The dislodging of the aerosol-forming substrate or the portion of the aerosol-forming substrate from the cavity may provide sufficient volume for the tool or at least portion of the tool to be

accommodated, whereby operation of the tool may then be uninterrupted for disengaging the cap and the body.

[0206] As used herein, the terms’’upstream” and“downstream” are intended to refer to the flow direction of the vapour/aerosol i.e. with the downstream end of the article/consumable being the mouth end or outlet where the aerosol exits the consumable for inhalation by the user. The upstream end of the article/consumable is the opposing end to the downstream end.

[0207] The aerosol-forming article may be capable of engaging with the device (i.e. received by the cavity of the cap). The aerosol-forming substrate is capable of being heated to release at least one volatile compound that can form an aerosol. The aerosol-forming substrate may be located at the upstream end of the article/consumable.

[0208] The tool of the system may be capable of engaging with the device (i.e. received by the cavity of the cap), upon dislodging the aerosol-forming article, to disengage the cap and the main body of the device. The tool may comprise the cap removal portion and the cleaning portion. The cap removal portion may comprise a rigid member a movable member. [0209] Optionally, the movable member may be configured to slide co-axially within the rigid member in a first position and a second position, to facilitate disengaging of the cap and the main body.

[0210] Conveniently, the cleaning portion of the tool may comprise one or more cleaning elements, which extending from the base element in a direction opposite to the direction of the plurality of flexible arms outwardly. The one or more cleaning elements may be at least one of brushes and bristles. The brushes or the bristles may be adapted for cleaning the heating element (thus, the heater), which will be exposed once the cap and the body are disengaged.

[0211] Advantageously, the cap removal portion of the tool may comprises a plurality of flexible engaging arms, which may be insertable into a cavity defined in the cap, to engage with at least one flexure bearing defined in the main body of the HNB device, and displacement of the movable member from the first position to the second position, is configured to translate the plurality of flexible engaging arms to the second condition, for displacing the at least one flexure bearing of the HNB device to disengage the cap and the main body.

[0212] The system mainly includes a device which may include the main body and the cap, where the cap may be removably attached to the body. Further, the system may include a tool, as provided in the first aspect, which may be adapted for disengaging the cap and the main body. The tool may include a rigid member, which may comprise a plurality of flexible engaging. The plurality of flexible engaging arms may be operable between a first condition and a second condition. Further, the tool may also include a movable member, which may be coaxial with the rigid member. The movable member may be operable between a first position and a second position that may translate the plurality of flexible engaging arms between the first condition and the second condition.

[0213] Optionally, each of the at least one flexure bearing may include a hook, adaptable to engage in a slit defined in the cap, to retain the cap in the main body. Further, the at least one flexure bearing may be moved from a locked position where the at least one flexure bearing may be engaged with the cap to a un-locked position where the hook of the at least one flexure bearing may be moved out of a slit defined in the cavity of the cap to disengage the cap and the main body. The hook of the at least one flexure bearing may be displaced outwardly from the slit by the movable member to disengage the cap and the main body. This way, the cap may be disengaged from the body by engaging the tool. The hook of the at least one flexure bearing may generally be referred to as a locking element that engages and disengages with the cap, when using the tool for the HNB device describes herein.

[0214] The tool or at least the portion of the tool may be insertable into the cavity, only upon removal (e.g. dislodging or disengaging) of the aerosol-forming substrate or the portion of the aerosol-forming substrate accommodated within the cavity, to render the cavity empty. The empty cavity may provide sufficient volume for at least a portion of the tool to be accommodated, whereby the tool may be operated to disengage the cap and the body.

[0215] In some embodiments, the plurality of flexible engaging arms may be insertable into a cavity defined in the cap. The plurality of flexible engaging arms may engage with at least one flexure bearing defined in the main body of the HNB device, on complete insertion into the cap. Further, the movable member, on operation from the first position to the second position, may be configured to translate the plurality of flexible engaging arms to the second condition. At the second condition, the plurality of flexible engaging arms may displace the at least one flexure bearing of the HNB device, to disengage the cap and the main body.

[0216] In order to generate an aerosol, the aerosol-forming substrate comprises at least one volatile compound that is intended to be vaporised/aerosolised and that may provide the user with a recreational and/or medicinal effect when inhaled. Suitable chemical and/or physiologically active volatile compounds include the group consisting of: nicotine, cocaine, caffeine, opiates and opoids, cathine and cathinone, kavalactones, mysticin, beta-carboline alkaloids, salvinorin A together with any combinations, functional equivalents to, and/or synthetic alternatives of the foregoing.

[0217] The aerosol-forming substrate may comprise plant material. The plant material may comprise least one plant material selected from the list including Amaranthus dubius, Arctostaphylos uva-ursi

(Bearberry), Argemone mexicana, Arnica, Artemisia vulgaris, Yellow Tees, Galea zacatechichi, Canavalia maritima (Baybean), Cecropia mexicana (Guamura), Oestrum noctumum, Cynoglossum virginianum (wild comfrey), Cytisus scoparius, Damiana, Entada rheedii, Eschscholzia califomica ( California Poppy),

Fittonia albivenis, Hippobroma longiflora, Humulus japonica (Japanese Hops), Humulus lupulus (Hops), Lactuca virosa (Lettuce Opium), Laggera alata, Leonotis leonurus, Leonurus cardiaca (Motherwort), Leonurus sibiricus (Honeyweed), Lobelia cardinalis, Lobelia inflata (Indian-tobacco), Lobelia siphilitica, Nepeta cataria (Catnip), Nicotiana species (Tobacco), Nymphaea alba (White Lily), Nymphaea caerulea (Blue Lily), Opium poppy, Passiflora incamata (Passionflower), Pedicularis densiflora (Indian Warrior), Pedicularis groenlandica (Elephant's Head), Salvia divinorum, Salvia dorrii (Tobacco Sage), Salvia species (Sage), Scutellaria galericulata, Scutellaria lateriflora, Scutellaria nana, Scutellaria species (Skullcap), Sida acuta (Wireweed), Sida rhombifolia, Silene capensis, Syzygium aromaticum (Clove), Tagetes lucida (Mexican Tarragon), Tarchonanthus camphoratus, Tumera diffusa (Damiana), Verbascum (Mullein), Zamia latifolia (Maconha Brava) together with any combinations, functional equivalents to, and/or synthetic alternatives of the foregoing.

[0218] The plant material may be tobacco. Any type of tobacco may be used. This includes, but is not limited to, flue-cured tobacco, burley tobacco, Maryland Tobacco, dark-air cured tobacco, oriental tobacco, dark-fired tobacco, perique tobacco and rustica tobacco. This also includes blends of the above mentioned tobaccos.

[0219] The tobacco may comprise one or more of leaf tobacco, stem tobacco, tobacco powder, tobacco dust, tobacco derivatives, expanded tobacco, homogenised tobacco, shredded tobacco, extruded tobacco, cut rag tobacco and/or reconstituted tobacco (e.g. slurry recon or paper recon).

[0220] The aerosol-forming substrate may comprise a gathered sheet of homogenised (e.g. paper/slurry recon) tobacco or gathered shreds/strips formed from such a sheet. [0221] The aerosol-forming substrate may comprise one or more additives selected from humectants, flavourants, fillers, aqueous/non-aqueous solvents and binders.

[0222] The flavourant may be provided in solid or liquid form. It may include menthol, liquorice, chocolate, fruit flavour (including e.g. citrus, cherry etc.), vanilla, spice (e.g. ginger, cinnamon) and tobacco flavour. The flavourant may be evenly dispersed throughout the aerosol-forming substrate or may be provided in isolated locations and/or varying concentrations throughout the aerosol-forming substrate.

[0223] The aerosol-forming substrate may be formed in a substantially cylindrical shape such that the article/consumable resembles a conventional cigarette. It may have a diameter of between 5 and 10mm e.g. between 6 and 9mm or 6 and 8mm e.g. around 7 mm. It may have an axial length of between 10 and 15mm e.g. between 1 1 and 14mm such as around 12 or 13mm.

[0224] The article/consumable may comprise at least one filter element. There may be a terminal filter element at the downstream/mouth end of the article/consumable.

[0225] The or at least one of the filter element(s) (e.g. the terminal filter element) may be comprised of cellulose acetate or polypropylene tow. The at least one filter element (e.g. the terminal filter element) may be comprised of activated charcoal. The at least one filter element (e.g. the terminal element) may be comprised of paper. The or each filter element may be at least partly (e.g. entirely) circumscribed with a plug wrap e.g. a paper plug wrap.

[0226] The terminal filter element (at the downstream end of the article/consumable) may be joined to the upstream elements forming the article/consumable by a circumscribing tipping layer e.g. a tipping paper layer. The tipping paper may have an axial length longer than the axial length of the terminal filter element such that the tipping paper completely circumscribes the terminal filter element plus the wrapping layer surrounding any adjacent upstream element.

[0227] In some embodiments, the article/consumable may comprise an aerosol-cooling element which is adapted to cool the aerosol generated from the aerosol-forming substrate (by heat exchange) before being inhaled by the user.

[0228] The article/consumable may comprise a spacer element that defines a space or cavity between the aerosol-forming substrate and the downstream end of the consumable. The spacer element may comprise a cardboard tube. The spacer element may be circumscribed by the (paper) wrapping layer.

[0229] According to a nineteenth aspect of the present invention, there is provided a HNB device. The HNB device may comprise a main body and a cap, where the cap may be releasably attached to the main body. The cap and the main body may be configured to be disengaged by a tool.

[0230] According to a twentieth aspect of the present invention, there is provided an HNB device, which may be capable of being operated by a tool. The device comprises a cap and a body, where the cap may be removably attached to the main body.

[0231] Conveniently, the cap and the main body are disengaged by the tool. The main body and the cap are disengaged by the cap removal portion of the tool, [0232] Conveniently, the device is cleaned by the tool. The device is cleaned by the cleaning portion of the tool.

[0233] According to a twenty-first aspect of the present invention, there is provided a method of cleaning the HNB device. The method comprising inserting the tool into the device, to clean the cavity and the heating element of the device.

[0234] In some embodiments the method may comprise operating the tool to displace the movable member coaxially within the rigid member from a first position to a second position, to scrape debris on the inner wall, and enclose the heating element and to scrape debris deposited on the heating element of the device.

[0235] Conveniently, the tool may be received by a cavity defined in the cap of the device. Upon insertion of the tool, the plurality of engaging arms engages with at least one flexure bearing defined in the main body of the device, Further, operation of the movable member from the first position to the second position may translate the plurality of flexible engaging arms to the second condition, for displacing the hook of the at least one flexure bearing of the device to disengage the cap and the main body.

[0236] According to a twenty-second aspect of the present invention, there is provided a HNB device, which may comprise a main body and a cap.

[0237] Conveniently, the cap may be removably attached to the main body, and may be disengaged by a tool.

[0238] In some embodiments, the cap may be defined with the cavity to receive the tool. Further, the plurality of flexible engaging arms of the tool may be insertable in the cavity of the cap. The plurality of flexible engaging arms may engage with at least one flexure bearing defined in the main body of the HNB device. Also, the movable member of the tool, on operation from the first position to the second position, may be configured to translate the plurality of flexible engaging arms to the second condition. In the second condition, the plurality of flexible engaging arms may displace the at least one flexure bearing of the HNB device to disengage the cap and the main body.

[0239] According to a twenty-third aspect of the present invention, there is provided a method of disengaging a cap and a main body of a HNB device. The method comprises acts of inserting a tool into the cap and the HNB device. Further, the tool may be operated to disengage the cap and the main body.

[0240] Conveniently, a cavity defined in the cap, may be configured to receive the tool. The plurality of flexible engaging arms of the tool may be inserted in the cavity of the cap, so as to engage with at least one flexure bearing defined in the main body of the HNB device. Further, the movable member of the tool may be operated from the first position to the second position, to translate the plurality of flexible engaging arms to the second condition. The plurality of flexible engaging arms, at the second condition, may displace the at least one flexure bearing of the HNB device to disengage the cap and the main body. The invention includes the combination of the aspects and preferred features described except where such a combination is clearly impermissible or expressly avoided. [0241] The invention includes the combination of the aspects and preferred features described except where such a combination is clearly impermissible or expressly avoided.

[0242] The skilled person will appreciate that except where mutually exclusive, a feature or parameter described in relation to any one of the above aspects may be applied to any other aspect. Furthermore, except where mutually exclusive, any feature or parameter described herein may be applied to any aspect and/or combined with any other feature or parameter described herein.

SUMMARY OF THE FIGURES

[0243] So that the invention may be understood, and so that further aspects and features thereof may be appreciated, embodiments illustrating the principles of the invention will now be discussed in further detail with reference to the accompanying figures, in which:

[0244] Figure 1A is a schematic of a smoking substitute system;

[0245] Figure 1 B is a schematic of a variation of the smoking substitute system of Figure 1A;

[0246] Figure 2A is a front view of a an embodiment of a smoking substitute system with the consumable engaged with the device;

[0247] Figure 2B is a front view of the embodiment of the smoking substitute system with the consumable disengaged from the device;

[0248] Figure 2C is a section view of the embodiment of the consumable of the first embodiment of the smoking substitute system;

[0249] Figure 2D is a detailed view of an end of the device of the embodiment of the smoking substitute system;

[0250] Figure 2E is a section view of the embodiment of the substitute smoking system;

[0251] Figure 3 is perspective view of the embodiment of the substitute smoking system with the cap in a partially open position.

[0252] Figure 4A is section view of the embodiment of the substitute smoking system with the cap in the closed position.

[0253] Figure 4B is section view of the embodiment of the substitute smoking system with the cap in the open position.

[0254] Figure 5A is a perspective view of a removal key or tool in accordance with an embodiment.

[0255] Figure 5B is a perspective view of the removal key or tool of Figure 5A with a first cover removed.

[0256] Figure 5C is a perspective view of the removal key or tool of Figure 5A with a second cover removed.

[0257] Figure 5D is a perspective view of another tool in accordance with an embodiment. [0258] Figure 5E is a perspective view of the tool of Figure 5D with a first cover removed.

[0259] Figure 6A illustrates a section view showing the removal key inserted in the cavity in insertion position.

[0260] 6B illustrates a section view showing the removal key inserted in the cavity in unlocking position.

[0261] Figure 7 (a) to (e) illustrates stages of using the removal key to separate the cap from the body of the smoking substitute device of the embodiment.

[0262] Figure 8A illustrates a perspective view of an embodiment of a tool with the cover partially covering the tool.

[0263] Figure 8B illustrates perspective view of the cover shown in Figure 8A.

[0264] Figure 9A is a sectional view of the cap and a portion of the main body of the device, of an embodiment of the smoking substitute system;

[0265] Figure 9B is a sectional view of the cap and a portion of the main body of the device of Figure 9A with the cap in a partially disengaged position;

[0266] Figure 10A is a perspective view of a tool of the smoking substitute system with enclosures;

[0267] Figure 10B is an exploded view of the tool of the smoking substitute system;

[0268] Figure 10C is a detailed view of the tool of the substitute smoking system without one of the enclosure;

[0269] Figure 10D is a detailed view of the tool of the smoking substitute system with the cleaning portion exposed;

[0270] Figure 1 1 is a front view of the cap and the main body of the device, with a portion of the tool inserted into the cap.

[0271] Figure 12A is a front view of the cap and the main body of the device, with the tool inserted into the cap.

[0272] Figure 12B is a sectional view of portion of Figure 12A.

[0273] Figure 13A is a front view of the cap with tool in operating condition to disengage the cap and the body of the device.

[0274] Figure 13B is a sectional view of a portion of Figure 12A,

[0275] Figure 14A is a perspective view of the cap being disengaged from the main body of the device, along with the tool.

[0276] Figure 14B is an exploded perspective view of the device and the cap. DETAILED DESCRIPTION OF THE INVENTION

[0277] Aspects and embodiments of the present invention will now be discussed with reference to the accompanying figures. Further aspects and embodiments will be apparent to those skilled in the art. All documents mentioned in this text are incorporated herein by reference.

[0278] Figure 1A is a schematic providing a general overview of a smoking substitute system 100. The system 100 includes a substitute smoking device 101 and an aerosol-forming article in the form of a consumable 102, which comprises an aerosol former 103. The system is configured to vaporise the aerosol former by heating the aerosol former 103 (so as to form a vapour/aerosol for inhalation by a user). The system 100 also includes a tool 135, configured to disengage one or more components of the device 101 from one or more other components of the device 101 , and optionally also for performing a cleaning operation of the device 101.

[0279] In the illustrated system, the heater 104 forms part of the consumable 102 and is configured to heat the aerosol former 103. In this variation, the heater 104 is electrically connectable to the power source 105, for example, when the consumable 102 is engaged with the device 101. Heat from the heater 104 vaporises the aerosol former 103 to produce a vapour. The vapour subsequently condenses to form an aerosol, which is ultimately inhaled by the user.

[0280] The system 100 further comprises a power source 105 that forms part of the device 101. In other embodiments the power source 105 may be external to (but connectable to) the device 101. The power source 105 is electrically connectable to the heater 104 such that it is able to supply power to the heater

104 (i.e. for the purpose of heating the aerosol former 103). Thus, control of the electrical connection of the power source 105 to the heater 104 provides control of the state of the heater 104. The power source

105 may be a power store, for example a battery or rechargeable battery (e.g. a lithium ion battery).

[0281] The system 100 further comprises an I/O module comprising a connector 106 (e.g. in the form of a USB port, Micro USB port, USB-C port, etc.). The connector 106 is configured for connection to an external source of electrical power, e.g. a mains electrical supply outlet. The connector 106 may be used in substitution for the power source 105. That is the connector 106 may be electrically connectable to the heater 104 so as to supply electricity to the heater 104. In such embodiments, the device may not include a power source, and the power source of the system may instead comprise the connector 106 and an external source of electrical power (to which the connector 106 provides electrical connection).

[0282] In some embodiments, the connector 106 may be used to charge and recharge the power source 105 where the power source 105 includes a rechargeable battery.

[0283] The system 100 also comprises a user interface (Ul) 107. Although not shown, the Ul 107 may include input means to receive commands from a user. The input means of the Ul 107 allows the user to control at least one aspect of the operation of the system 100. The input means may, for example, be in the form of a button, touchscreen, switch, microphone, etc. [0284] The Ul 107 also comprises output means to convey information to the user. The output means may, for example, comprise lights (e.g. LEDs), a display screen, speaker, vibration generator, etc.

[0285] The system 100 further comprises a controller 108 that is configured to control at least one function of the device 101 . In the illustrated embodiment, the controller 108 is a component of the device 101 , but in other embodiments may be separate from (but connectable to) the device 101 . The controller 108 is configured to control the operation of the heater 104 and, for example, may be configured to control the voltage applied from the power source 105 to the heater 104. The controller 108 may be configured to toggle the supply of power to the heater 104 between an on state, in which the full output voltage of the power source 105 is applied to the heater 104, and an off state, in which the no voltage is applied to the heater 104.

[0286] Although not shown, the system 100 may also comprise a voltage regulator to regulate the output voltage from the power source 105 to form a regulated voltage. The regulated voltage may then be applied to the heater 104.

[0287] In addition to being connected to the heater 104, the controller 108 is operatively connected to the Ul 107. Thus, the controller 108 may receive an input signal from the input means of the Ul 107.

Similarly, the controller 108 may transmit output signals to the Ul 107. In response, the output means of the Ul 107 may convey information, based on the output signals, to a user. The controller also comprises a memory 109, which is a non-volatile memory. The memory 109 includes instructions, which, when implemented, cause the controller to perform certain tasks or steps of a method.

[0288] Figure 1 B is a schematic showing a variation of the system 100 of Figure 1A. In the system 100’ of Figure 1 B, the heater 104 forms part of the device 101 , rather than the consumable 102. In this variation, the heater 104 is electrically connected to the power source 105,

[0289] Figures 2A and 2B illustrate a heated-tobacco (HT) smoking substitute system 200. The system

200 is an example of the systems 100, 100’ described in relation to Figures 1A or 1 B. System 200 includes an HT device 201 and an HT consumable 202. The description of Figures 1A and 1 B above is applicable to the system 200 of Figures 2A and 2B, and will thus not be repeated.

[0290] The device 201 , the consumable 202 and the tool 235 are configured such that the consumable 202 and the tool (as shown in figure 5A) may be selectively engaged with the device 201 . Figure 2A shows the device 201 and the consumable 202 in an engaged state, whilst Figure 2B shows the device

201 and the consumable 202 in a disengaged state.

[0291] The device 201 comprises a body 209 and cap 210. In use the cap 210 is engaged at an end of the body 209. Although not apparent from the figures, the cap 210 is moveable relative to the body 209.

In particular, the cap 210 is slideable and can slide along a longitudinal axis of the body 209.

[0292] As shown in Figure 7(e), the body 209 defines a transverse cavity 227 extending orthogonal to the longitudinal axis of the body 209. The transverse cavity 227 opens through and extends from a first side wall of the body 209 towards and surrounding at least a portion of the heating element. The transverse cavity 227 is located on the body 209 such that at least a base 228 of the heating element is juxtaposed with the transverse cavity 227. The transverse cavity 227 extends from a first side wall of the body 209 to and through a second side wall opposite to the first side wall of the body 209. That is, the transverse cavity 227 forms a through hole extending through the body 209.

[0293] The device 201 comprises an output means (forming part of the Ul of the device 201) in the form of a plurality of light-emitting diodes (LEDs) 21 1 arranged linearly along the longitudinal axis of the device 201 and on an outer surface of the body 209 of the device 201 . A button 212 is also arranged on an outer surface of the body 209 of the device 201 and is axially spaced (i.e. along the longitudinal axis) from the plurality of LEDs 21 1 .

[0294] Figure 2C shows a detailed section view of the consumable of 202 of the system 200. The consumable 202 generally resembles a cigarette. In that respect, the consumable 202 has a generally cylindrical form with a diameter of 7 mm and an axial length of 70 mm. The consumable 202 comprises an aerosol forming substrate 213, a terminal filter element 215, an upstream filter element 215 and a spacer element 216. In other embodiments, the consumable may further comprise a cooling element. A cooling element may exchange heat with vapour that is formed by the aerosol-forming substrate 213 in order to cool the vapour so as to facilitate condensation of the vapour.

[0295] The aerosol-forming substrate 213 is substantially cylindrical and is located at an upstream end 217 of the consumable 202, and comprises the aerosol former of the system 200. In that respect, the aerosol forming substrate 213 is configured to be heated by the device 201 to release a vapour. The released vapour is subsequently entrained in an airflow flowing through the aerosol-forming substrate 213. The airflow is produced by the action of the user drawing on a downstream 218 (i.e. terminal or mouth end) of the consumable 202.

[0296] In the present embodiment, the aerosol forming substrate 213 comprises tobacco material that may, for example, include any suitable parts of the tobacco plant (e.g. leaves, stems, roots, bark, seeds and flowers). The tobacco may comprise one or more of leaf tobacco, stem tobacco, tobacco powder, tobacco dust, tobacco derivatives, expanded tobacco, homogenised tobacco, shredded tobacco, extruded tobacco, cut rag tobacco and/or reconstituted tobacco (e.g. slurry recon or paper recon). For example, the aerosol-forming substrate 213 may comprise a gathered sheet of homogenised (e.g.

paper/slurry recon) tobacco or gathered shreds/strips formed from such a sheet.

[0297] In order to generate an aerosol, the aerosol forming substrate 213 comprises at least one volatile compound that is intended to be vaporised/aerosolised and that may provide the user with a recreational and/or medicinal effect when inhaled. The aerosol-forming substrate 213 may further comprise one or more additives. For example, such additives may be in the form of humectants (e.g. propylene glycol and/or vegetable glycerine), flavourants, fillers, aqueous/non-aqueous solvents and/or binders.

[0298] The terminal filter element 214 is also substantially cylindrical, and is located downstream of the aerosol forming substrate 213 at the downstream end 218 of the consumable 202. The terminal filter element 214 is in the form of a hollow bore filter element having a bore 219 (e.g. for airflow) formed therethrough. The diameter of the bore 219 is 2 mm. The terminal filter element 214 is formed of a porous (e.g. monoacetate) filter material. As set forth above, the downstream end 218 of the consumable 202 (i.e. where the terminal filter 214 is located) forms a mouthpiece portion of the consumable 202 upon which the user draws. Airflow is drawn from the upstream end 217, thorough the components of the consumable 202, and out of the downstream end 218. The airflow is driven by the user drawing on the downstream end 218 (i.e. the mouthpiece portion) of the consumable 202.

[0299] The upstream filter element 215 is located axially adjacent to the aerosol-forming substrate 213, between the aerosol-forming substrate 213 and the terminal filter element 214. Like the terminal filter 214, the upstream filter element 215 is in the form of a hollow bore filter element, such that it has a bore 220 extending axially therethrough. In this way, the upstream filter 215 may act as an airflow restrictor. The upstream filter element 215 is formed of a porous (e.g. monoacetate) filter material. The bore 220 of the upstream filter element 214 has a larger diameter (3 mm) than the terminal filter element 214.

[0300] The spacer 216 is in the form of a cardboard tube, which defines a cavity or chamber between the upstream filter element 215 and the terminal filter element 214. The spacer 216 acts to allow both cooling and mixing of the vapour/aerosol from the aerosol-forming substrate 213. The spacer has an external diameter of 7 mm and an axial length of 14mm.

[0301] Although not apparent from the figure, the aerosol-forming substrate 213, upstream filter 215 and spacer 216 are circumscribed by a paper wrapping layer. The terminal filter 214 is circumscribed by a tipping layer that also circumscribes a portion of the paper wrapping layer (so as to connect the terminal filter 214 to the remaining components of the consumable 202). The upstream filter 215 and terminal filter 214 are circumscribed by further wrapping layers in the form of plug wraps.

[0302] Returning now to the device 201 , Figure 2D illustrates a detailed view of the end of the device 201 that is configured to engage with the consumable 202. The cap 210 of the device 201 includes an opening 221 to an internal cavity 222 (more apparent from Figure 2D) defined by the cap 210. The opening 221 and the cavity 222 are formed so as to receive at least a portion of the consumable 202. During engagement of the consumable 202 with the device 201 , a portion of the consumable 202 is received through the opening 221 and into the cavity 222. After engagement (see Figure 2B), the downstream end 218 of the consumable 202 protrudes from the opening 221 and thus also protrudes from the device 201 . The opening 221 includes laterally disposed notches 226. When a consumable 202 is received in the opening 221 , these notches 226 remain open and could, for example, be used for retaining a cover in order to cover the end of the device 201 .

[0303] Figure 2E shows a cross section through a central longitudinal plane through the device 201 . The device 201 is shown with the consumable 202 engaged therewith. Further, as illustrated, at least one locking arm 229 extends from the body 209. The locking arms 229 lock or retain the cap 210 with the body 209. In the embodiment as illustrated, two locking arms 229 are present. In an embodiment, any suitable number of locking arms 229 may be provided. The locking arms 229 extend substantially along the longitudinal axis of the body 209 as shown. The locking arms 229 are provided with a locking protrusion 231 at a distal end, i.e. an end distal from an end of the locking arm 229 that is connected to the body 209. The locking protrusion 231 extends transversely to the longitudinal axis of the body 209. The locking protrusion 231 extends transversely to the longitudinal axis of the corresponding locking arm 229. The locking arms 229 are positioned such that when the cap 210 is mounted on the body 209, the locking arms 229 engage the cap 210 to retain the cap 210 on the body 209.

[0304] In the embodiment as shown, the cap 210 may be provided with a slot 232 extending along the longitudinal axis of the body 209 (when the cap 210 is retained on the body 209), and the locking protrusions 231 may be configured or positioned to engage the slot 232. The slot 232 may be elongated such that the cap 210 may be moved or slid relative to the body 209 along the longitudinal axis of the body 209. The locking protrusion 231 may have an abutment surface 233 to engage a peripheral surface 234 of the cap 210 that defines the slot 232. The abutment surface 233 may block movement of the cap 210 in one direction by abutting the peripheral surface 234 to retain or lock the cap 210 with the body 209.

[0305] The cap 210 is movable between a first position and a second position. Figures 2A, 2B and 2D and 4A illustrate the device 200 with the cap 210 in the first position. When the cap 210 is in the first position, the cap 210 conceals the heating element 223, as illustrated. In the first position, the cap 210 may completely cover the transverse cavity 227 to conceal the heating element 223.

[0306] Figure 3 and Figure 4B illustrate the device 200 with the cap 210 in the second position. When the cap 210 is in the second position, the cap 210 at least partially exposes the heating element 223. In the second position, the cap 210 at least partially uncovers the transverse cavity 227 to partially or completely expose the heating element 223. When the heating element 223 is exposed, the heating element 223 may be examined visually to ascertain if cleaning of the heating element 223 is required. If required, when the cap 210 is in the second position, the heating element 223 may be at least partly cleaned by blowing air through the opening or simply shaking, tilting and or tapping the device gently to dislodge and remove the debris. A cleaning tool may also be pushed into the transverse cavity 227 to clean the heating element 223. In the second position, the abutment surface 233 of the cap 210 may abut the peripheral surface 234 as discussed in the foregoing description.

[0307] The device 201 comprises a heater 204 comprising heating element 223. The heater 204 forms part of the body 209 of the device 201 and is rigidly mounted to the body 209. In the illustrated embodiment, the heater 204 is a rod heater with a heating element 223 having a circular transverse profile. In other embodiments the heater may be in the form of a blade heater (e.g. heating element with a rectangular transverse profile) or a tube heater (e.g. heating element with a tubular form).

[0308] The heating element 223 of the heater 204 projects from an internal base of the cavity 222 along a longitudinal axis towards the opening 221 . As is apparent from the figure, the length (i.e. along the longitudinal axis) of the heating element is less than a depth of the cavity 222. In this way, the heating element 223 does not protrude from or extend beyond the opening 221 . [0309] When the consumable 202 is received in the cavity 222 (as is shown in Figure 2E), the heating element 223 penetrates the aerosol-forming substrate 213 of the consumable 202. In particular, the heating element 223 extends for nearly the entire axial length of the aerosol-forming substrate 213 when inserted therein. Thus, when the heater 204 is activated, heat is transferred radially from an outer circumferential surface the heating element 223 to the aerosol-forming substrate 213.

[0310] The smoking substitute system of the present disclosure may further include a removal key (also referred to herein as a tool) 235 for separation of the cap 210 from the body 209. The removal key or tool 235 may be configured to displace the locking arms 229 to enable separation of the cap 210 from the body 209. Figures 5A, 5B and 5C illustrate a tool 235 in accordance with an embodiment. The tool 235 may comprise a cap removal portion 235a and a cleaning tool portion 235b. The cap removal tool portion 235a has at least one unlocking arm 230. In the embodiment as illustrated, two unlocking arms 230 are provided. The number of unlocking arms 230 may be provided as required and may correspond to the number of locking arms 229.. In an embodiment, the number of unlocking arms 230 may correspond to the number of locking arms 229. The unlocking arms 230 are adapted to engage the locking arms 229 to displace the locking arms 229 for separating the cap 210 from the body 209. Each unlocking arm 230 may be provided with an unlocking projection 236. The unlocking projection 236 may extend in a direction transverse to the longitudinal axis of the unlocking arm 230. The unlocking projections 236 are adapted to engage the locking protrusions 231 to displace the locking protrusions 231 for releasing the cap 210 from the body 209.

[0311] The removal key 235 may include a central rod 237 extending from a connector 246. A collar 238 may be positioned concentrically on the central rod 237. The collar 238 may be placed movably on the rod such that the collar 238 moves relative to the central rod 237 along a longitudinal axis of the central rod 237. The connector 246 and the collar 238 form the main body of the tool. That is, as illustrated in Figures 5B and 5C, the cleaning portion 241 and central rod 237 extend from either sides of the connector 246, whilst the collar 238 is configured to engage with the cover 242, via the central rod. As shown in Figure 5C, when a cover is engaged with the collar 238, it covers the cap removal portion and collar 238 abuts the connector 246, e.g. together the collar 238 and the connector 246 form the main body of the tool.

[0312] The unlocking arms 230 may extend from the collar 238 along the longitudinal axis of the central rod 237. The collar 238 may be movable on the central rod 237 between an insertion portion and an unlocking position. In the insertion position, the central rod 237 may be kept away from the unlocking protrusions 236 and the unlocking arms 230 may flex radially inwards relative to the longitudinal axis of the central rod 237. In Figure 5B and Figure 6A, the collar 238 is shown in the insertion position. In the unlocking position, the central rod 237 moves in juxtaposition with the unlocking protrusions 236 to prevent flexing of the unlocking arms 230 in a direction radially inwards relative to the longitudinal axis of the central rod 237. Figure 6B illustrates the collar 238 in the unlocking position. Suitable provision may be provided on the collar 238 and the rod to enable and/or guide movement of the collar 238 between the insertion position and the unlocking position. The collar 238 may be biased to move towards the insertion position using any suitable means such as a coil spring. The central rod 237 acts a separator of the unlocking arms 230. In some embodiments, the separator includes a heater cavity for receiving the heater 223 of the device 201 when the removal key 235 is engaged with the cavity 222.

[0313] The removal key or tool 235 may be configured for insertion into the cavity 222 as shown through Figures 7(a)-(e). The unlocking protrusions 236 are configured such that when the unlocking arms 230 are inserted into the cavity 222, the unlocking arm 230 displaces the locking arms 229 to release engagement of the locking arms 229 from the slots 232, and in particular to displace the locking protrusions 231 from the slots 232. In the embodiment as illustrated, the unlocking protrusions 236 are configured such that when inserted into the cavity 222, the unlocking protrusions 236 enter the slots 232 defined in the cap 210 to displace the locking protrusions 231 , in order to dislodge and release the cap 210 from engagement with the body 209. The unlocking protrusions 236 may have dimensions that interfere with the width of the cavity 222. Thus in order to allow insertion of the unlocking arms 230 in the cavity 222, in the insertion position, the central rod 237 is away from the distal ends of the unlocking arms 230 to allow the distal ends of the unlocking arms 230 to flex radially inwards to enable insertion of the unlocking arms 230 with the unlocking protrusions 236 into the cavity 222. The flexing may be achieved when the unlocking protrusions 236 abut and slide against an inner surface 239 of cap 210 defining the internal cavity 222. The unlocking protrusions 236, as shown in the embodiment illustrated, may be provided with tapered surfaces 240 to guide the flexing movement of the unlocking arms 230 in and out from the cavity 222 and the slots 232. Figure 7(a) shows the removal key 235 being inserted in the cavity 222 with the collar 238 in the insertion position.

[0314] In the initial stage, the removal key 235 may be pushed towards the body 209 (as indicated by directional arrow in Figure 6A) to insert the unlocking arms 230 into the cavity 222 until the collar 238 abuts the opening of the cavity 222 as shown in Figure 6A and Figure 7(b). At this stage, as shown in Figure 6A, the unlocking arms 230 enter the slots 232 defined in the cap 210. At this stage, the unlocking protrusions 236 may not completely displace the locking protrusions 231 as required for separation of the cap 210. Further, the central rod 237 may be pushed into the cavity 222 to move the collar 238 (relative to the central rod 237) to the unlocking position as shown in Figure 6(c). On pushing the central rod 237, the unlocking protrusion 236 may be pushed radially outward to enter the slots 232 properly and occupy the slot 232 as shown in Figure 6B, to displace and move the locking protrusions 231 radially outward (shown by the arrows) to remove them from the slots 232. After this, the cap 210 along with removal key 235 may be pulled away from the body 209 to separate the cap 210 from the body 209 as shown in Figure 7(d). Figure 7(e) illustrates cap 210 completely separated from the body 209.

[0315] The removal key or tool 235 may have a cleaning tool portion 235b as an additional feature for cleaning the heating element 223. The cleaning tool portion may have cleaning means in form of a brush or cleaning bristles 241 as shown in Figure 5C. The cleaning bristles 241 may extend from the central rod 237 in a direction opposite to the direction of extension of the unlocking arms 230, as shown in Figure 5C. The cleaning bristles 241 may be rubbed on the outer surface of the heating element 223 to clean or scrape off any debris or residuals from the heating element 223. [0316] The removal key or tool 235 may include a first cover 242 to cover the cap removal portion 235a and thus also the unlocking arms 230 when not in use. Further, a second cover 243 may be provided to cover the cleaning tool portion 235b and thus also the cleaning bristles 241 when not in use. The covers 242, 243 may be designed such that the tool 235 may visually resemble a consumable for the smoking substitute system. Suitable provisions may be provided to retain the cover on the removal key or tool 235. The tool 235 is generally elongate and may have a generally circular transverse cross-sectional shape.

[0317] As shown in Figure 8A, the tool 235 comprises two separable parts between which relative rotation should be prevented. The two separable parts may be the first cover 242 and the collar 238 of the main body. In an embodiment of the present disclosure the two separable parts have co-operating interacting features that, when engaged with one another, prevent relative rotation of the two parts. Further, the cooperating features may include a notch, depression or groove 245 formed on a flange portion 244 on the collar 238 and a protrusion 242a formed at an opening of a cavity of the cover 242. Alternatively, the flange portion 244 of the collar 238 may have a protrusion and the opening of the cavity of the cover 242 may include a notch, depression or groove. The notch 245 and the protrusion 242a interact to prevent the relative rotation. As shown, there is more than one notch-protrusion pairs provided between the collar 238 and the cover 242.

[0318] As shown in figure 8B, the first cover 242 has one or more protrusions 242a around its periphery. The protrusion 242a may be an elongated surface or channel extending parallel to the longitudinal axis of the central rod 237. The protrusion 242a extends longitudinally from the peripheral surface towards the other end (i.e. away from the peripheral surface). Further, as shown in figure 8A, the collar 238 comprises a front end 238a and a rear end 238b. The front end 238a is connected with a flange portion 244. The flange portion 244 has a circular cross section or but it may have a rectangular cross section or any other geometrical shape in other embodiments. The flange 244 comprises one or more notches 245 around its periphery which correspond with the protrusion 242a of the cover. The size of the notch 245 corresponds to the width of the protrusion 242a so that the protrusion 242a is secured in the depression 245 when the cover 242 is engaged with the collar 238 of the main body. The depression 245 and protrusion 242a may fit together through push or bump fit.

[0319] The bump fit or push fit may have a non-circular profile such as oval or hexagonal or trapezoidal or any other non-circular profile to prevent rotation between the cover 242 and collar 238. The flange 244 may also have a central hole over which the collar 238 moves along the longitudinal direction over the central rod 237 parallel to the longitudinal axis of the central rod 237. The collar 238 along with the flange 244 is positioned coaxially with the central rod 237 in such a manner that the collar 238 travels longitudinally along the axis of the central rod 237.

[0320] As shown in figure 8A, the cleaning tool portion comprises a connector 246 and the elongated member or brush 241 . The connector 246 has a first end 246a and a second end 246b. The rear end 238b of the collar 238 abuts or touches with the first end 246a of a connector 244 and the brush 241 is extended from the second end 246b of the connector 246. In an embodiment of the present disclosure, threads are formed in between the first end 246a of the connector 246 the second end 246b of the connector. The second cover 243 has threads on its periphery and henceforth the second cover 243 is screw threaded with the threads of the connector 244 and thus and covers the cleaning tool portion. In an embodiment of the present disclosure, the brush 241 is formed by a pair of elongated members with circular ends at the tip thereby connecting the members. The elongated bars enables the cleaning of the heater surface and removes all the debris and other foreign particles.

[0321] As noted above, the removal key or tool 235 has a collar 238. The collar is placed in between the cap removal portion 235a and the cleaning tool portion 235b. The collar 238 may include the visual indicator for alignment (for example, a dot or marking on the collar). As illustrated in figures 5D and 5E which illustrate an alternative configuration of the tool 235, the collar 238 may have two ends, i.e. a first end 238a and a second end 238b. At the first position i.e. the position at which the tool 235 is not in use (as shown in figure 5D), the first end 238a of the collar touches the cover 243 of the cleaning tool portion and the second end 238b of the collar abuts with the cover 242 of the cap removal tool portion 235a.

[0322] The length of the collar 238 is defined as the measurement of the ends which is measured orthogonally to a longitudinal axis of a central rod 237. In an embodiment of the present disclosure, the collar has a length of at least 3mm. In an alternate embodiment of the present disclosure the collar has a length more than 5mm and more preferably more than 10mm. The width of the collar is defined as the measurement of the ends which is measured parallelly to the longitudinal axis of the central rod 237. The collar may also have a periphery 238c which connects the first end and of the collar with the second end of the collar having a concave or a convex shape. The concave shape is the shape where the width of the collar 238 is wider than the width of the cleaning portion 235b, or the cover 243 of the cleaning portion. The concave shape is also the shape where the width of the collar 238 is wider than width of the cap removal portion 235b, or the cover 242 of the cap removal portion. The convex is the shape where the width of the collar 238 is narrower than the width of the cleaning portion, or the cover of the cleaning portion. The convex shape is also the shape where the width of the collar is narrower than the cap removal portion, or the cover of the cap removal portion. The concave or convex shape of the periphery 238c allows the user to sufficiently grip the tool when pulling both parts of the tool apart such that the tool can transform into its second position. At the second position, the cover of the cap removal tool is removed, and the collar moves longitudinally away from the cleaning tool portion. The longitudinal movement of the collar relative to the cap removal end of the tool activates the cap removal mechanism. The cap removal end of the tool may be the end of the cleaning tool portion. The collar may form a handle portion of the tool 235.

[0323] The device 201 further comprises an electronics cavity 224. A power source, in the form of a rechargeable battery 205 (a lithium ion battery), is located in electronics cavity 224.

[0324] The device 201 includes a connector (i.e. forming part of an IO module of the device 201) in the form of a USB port 206. The connector may alternatively be, for example, a micro-USB port or a USB-C port for examples. The USB port 206 may be used to recharge the rechargeable battery 205. [0325] The device 201 includes a controller (not shown) located in the electronics cavity 224. The controller comprises a microcontroller mounted on a printed circuit board (PCB). The USB port 206 is also connected to the controller 208 (i.e. connected to the PCB and microcontroller).

[0326] The controller 208 is configured to control at least one function of the device 201. For example, the controller 208 is configured to control the operation of the heater 204. Such control of the operation of the heater 204 may be accomplished by the controller toggling the electrical connection of the rechargeable battery 205 to the heater 204. For example, the controller 208 is configured to control the heater 204 in response to a user depressing the button 212. Depressing the button 212 may cause the controller to allow a voltage (from the rechargeable battery 205) to be applied to the heater 204 (so as to cause the heating element 223 to be heated).

[0327] The controller is also configured to control the LEDs 211 in response to (e.g. a detected) a condition of the device 201 or the consumable 202. For example, the controller may control the LEDs to indicate whether the device 201 is in an on state or an off state (e.g. one or more of the LEDs may be illuminated by the controller when the device is in an on state).

[0328] The device 201 comprises a further input means (i.e. in addition to the button 212) in the form of a puff sensor 225. The puff sensor 225 is configured to detect a user drawing (i.e. inhaling) at the downstream end 218 of the consumable 202. The puff sensor 225 may, for example, be in the form of a pressure sensor, flowmeter or a microphone. The puff sensor 225 is operatively connected to the controller 208 in the electronics cavity 224, such that a signal from the puff sensor 225, indicative of a puff state (i.e. drawing or not drawing), forms an input to the controller 208 (and can thus be responded to by the controller 208).

[0329] Further aspects of the present invention will now be described with reference to figures 9 to 14.

[0330] Figures 9A and 9B correspond generally to figures 4A and 4B and show cross sections through a central longitudinal plane of the device 201 , without having the consumable 202 engaged with the cap 210. Further, Figure 9A shows that the cap 210 is engaged to the body 209, while Figure 9B shows that the cap 210 is partially disengaged (e.g. can be slideable along a longitudinal axis of the cap 210, but can still be engaged with the body 209, and shifted) from the body 209.

[0331] The body 209 of the device 201 includes a plurality of guideways. A plurality of first guideways 250 can be defined on an inner circumference of the body 209, at the body 209 and the cap 210 interface.

The plurality of first guideways 250 are configured to receive the cap 210 and allow downward movement of the cap 210, so as to accommodate the cap 210 or a portion of the cap 210 in the body 209. Further, a plurality of second guideways 251 are also defined in the body 209, about the heater 204. The plurality of second guideways 251 are configured to receive the cap 210 such that the cavity defined by the cap 210 is circumscribed by the plurality of second guideways 229, during engagement of the cap 210 with the body 209. The cavity 222 of the cap 210 can be configured to traverse on the plurality of second guideways 251 to circumscribe the heating element 223 of the heater 204, upon engagement of the cap 210 with the body 209. [0332] In the illustrated embodiment, the cavity 222 or a portion of the cavity 222 may be defined with a through opening or slit 252 (e.g. a portion of wall defining the cavity 222 is provided with a through opening). The slit 252 in the cavity 222 may be configured to circumscribe or partially circumscribe the heating element 223, upon engagement of the cap 210 with the body. The cavity 222 may further include the rigid base region 253, defined downstream of the slit 230. The rigid base region 253 may be configured to seat around a portion of the heating element 223, which is extending from the body of the device 201 .

[0333] The body further comprises at least one flexure bearing 254, each of which may take the form of a moveable or flexible hinge. In an illustrative embodiment, the at least one flexure bearing 254 of the device 201 comprises two moveable hinges in the form of living hinges (as e.g. two living hinges facing each other are shown in Figure 9A and 9B). The at least one flexure bearing 254 may be located proximal to the heating element 223, and can be defined downstream of the plurality of second guideways 251 defined in the body. The at least one flexure bearing 254 may be configured to extend along the length of the heating element 223. The at least one flexure bearing 254 may be adapted to engage with an external surface of the cavity 222, when the cap 210 may be received by the body 209.

[0334] As apparent from Figure 9A, each of the at least one flexure bearing 254 (i.e. moveable hinge) is fixedly connected to the body 209 of the device 201 , and includes a locking element or hook 255 at a distal end. The hook 255 may extend laterally from the end of each of the at least one flexure bearing 254, and may be defined in a wedge shape. The hook 255 of the at least one flexure bearing 254 is configured to ride along the cavity 222 of the cap 210 (that is, on the walls defining the cavity 222 of the cap 210), until the hook 255 is adapted to engage with the slit 252 defined on the at least one side of the cavity 222 of the cap 210. Portion of the cavity 222 defining the slit 252 may be adapted to accommodate (or receive) the hook 255 of the at least one flexure bearing 254, upon engagement of the cap and the body. The hook 255 of the at least one flexure bearing 254 is adapted to be displaceable (that is, e.g. an inward and outward movement with regard to e.g. the heater element 223) in the slit 252 of the cavity 222, with respect to the heating element 223 of the heater 204. In this way, the consumable 202 when inserted into the cavity 222 of the cap 210 may be held in engagement with the heater element 223. The locking elements may in particularly not protrude into the cavity, so to not provide any obstacle for a consumable.

[0335] During lifting of the cap 210 (e.g. upward movement of the cap 210 or pull force applied on the cap 210 along a longitudinal axis of the device 201) for disengaging the cap 210 from the body 209, the hook 255 of the at least one flexure bearing 254 is configured to restrain disengagement (i.e. stopping further movement of the cap in a longitudinal direction) of the cap 210, as apparent from Figure 9B. The hook 255 of the at least one flexure bearing 254 is configured to engage with the rigid base region 253 of the cavity 222 defined in the cap 210. Thus, the cap 210 may be partially disengaged (that is, the cap can still be engaged with the body, but shifted or lifted) from the body 209, in response to operation of the at least one flexure bearing 254 in the body, during lifting of the cap 210. That is, the cap 210 may be allowed to be lifted to a height (e.g. distance along longitudinal axis of the device 201 ) defined by the length of the at least one flexure bearing 254 and position of the hook 255 on the at least one flexure bearing 254 in the body 209. However, the cap 210 is restrained from completely disengaging (e.g. being removed or dislodged) from the body 209 of the device 201 . The height and thickness of the rigid base region 253 may be considered as a restricting factor for disengagement of the cap 210 and the body 209. In respect to this, a portion of the heating element 223 or the heater 204 may be exposed, upon lifting (or shifting) the cap 210 with respect to the body. In order for complete access (e.g. exposure) to the heater or the heating element 223 in the device 201 , there may be a requirement of disengagement of the cap 210 completely from the body 209.

[0336] The tool 235 is illustrated in Figure 10A, and is configured for disengaging the cap 210 and the body of the device 201 . The tool 235 is an example of the tool 135 defined in the first embodiment of the system 100, as illustrated in Figure 1A or the removal key described hereinbefore. The tool 235 comprises cap removal portion 301 and a cleaning portion 302, for disengaging the cap 210 and the body 209 of the device 201 and for cleaning the device 201 (i.e. the heating element 223). The cap removal portion 301 and the cleaning portion 302 may be separated by a base element 263. The cap removal portion 301 and the cleaning portion 302 may be configured to extend on either side of the base element 263. Further, the cap removal portion 301 and the cleaning portion 302 may extend in a substantially opposite direction to each other. The cap removal portion 301 may be enclosed by a first enclosure 256 and the cleaning portion 302 may be enclosed by a second enclosure 257 respectively. The first enclosure 256 and the second enclosure 257 may be engaged with the tool 235 by at least one of threaded connection, snap fitted connection and an interference fit connection. As apparent from Figure 10B, the first enclosure 256 is operated (i.e. removed) to access the cap removal portion 301 of the tool 235 for disengaging the cap 210 and the body of the device 201 , while the second enclosure 257 enclosing the cleaning portion 302 is held as a grip portion (e.g. for gripping with fingers of the user) for the user to grip and operate the tool 235. That is, the first enclosure 256, may be adapted as gripping unit, while operating the cleaning portion 302 and the second enclosure 257 may be adapted as gripping unit, while operating the cap removal portion 301 . In alternative arrangements, the second enclosure 257 can instead be configured to be accessible for encompassing components for functions such as a storage compartment, a spray unit (e.g. dispensing mouth refresher) and the like.

[0337] The tool 235, at the first enclosure 256, is configured to encompass a rigid member 258 (also referred to herein as a static member) and a movable member 259. Each of the rigid member 258 and the movable member 259 are configured to extend in a direction opposite to the second enclosure 257 (e.g. along the longitudinal axis of the tool 235 and in a direction to be accommodated within the first enclosure 256).

[0338] As apparent in Figure 10D, the first enclosure 256 may be engaged with the collar portion 261 of the rigid member 258, by snap fit connection, to enclose the cap removal portion 301 . The second enclosure 257, may engaged to the base element 263 by a threaded connection, to enclose the cleaning portion 302 of the tool 235. [0339] The rigid member 258 includes a plurality of flexible engaging arms 260. In an illustrative embodiment, the rigid member 255 is defined with a collar 261 , where the plurality of flexible engaging arms 260 is adapted to extend from the collar 261 . The movable member 259 and the rigid member 258 are co-axial such that, the movable member 259 or a portion of the movable member 259 is radially housed (e.g. about the perimeter) by the collar 261 . The collar 261 may be configured to separate the first enclosure 256 from the second enclosure 257. On the other hand, the movable member 259 is fixed (e.g. fastened, adhesive bonded, snap fitted, and the like) to the second enclosure 257. The collar 261 and the movable member 259 can be relatively moved with respect to each other (e.g. the movable member 259 can move with respect to position of the collar 261 , or vice versa).

[0340] In the illustrated embodiment, the movable member 259 includes a plunger 262 (e.g. acting as a body segment having a profile such as, but not limited to, cylindrical, cuboidal, rod-like, etc.), where a portion of the plunger 262 is fixed to the base element 263 of the second enclosure 257 and is configured to extend from the base element 257. The movable member 259 is co-axially slideable within the collar 261 of the rigid member 258, between a first position (e.g. the collar 261 being distal from the second enclosure 257) and a second position (e.g. the collar 261 being proximal to the second enclosure 257), through displacement of the second enclosure 257 about the collar 261 . That is, the movable member 259 may be linearly retracted to the first position and slid forward to the second position relative to position of the collar 261 by selective operation of the second enclosure 257.

[0341] As apparent in figure 10C, the plunger 262 of the movable member 259 is configured with a sliding path 270 (e.g. a groove inscribed on an outer circumference of the plunger 262). The sliding path 270 may be defined with one or more slots 271 (as seen in figure 1 1), preferably at distal ends of the sliding path 270.

[0342] The rigid member 258 is configured to accommodate an element 272 (e.g. the element may be a pin having a profile such as cylindrical, rod like, etc.). The element 272 may extend from the collar 261 of the rigid member 258 into a sliding path 270 coaxially defined on the plunger 262 of the movable member 259 along the longitudinal axis. The element 272 may facilitate in visually indicating an orientation of the tool 235, relative to the device 201 . This visual indication, may facilitate in precise positioning/engaging of the tool 235 with the device 201 . The element 272 may be guided within the sliding path 270 and may be configured to occupy the one or more slots 271 in the sliding path 270, to lock the movable member 259 selectively in the first position and the second position. The element 272 may be optionally provided with a resilient member (not shown), to enable the element 272 to effectively occupy the one or more slots 271 defined in the sliding path 270.

[0343] As also apparent in figure 10C, the plunger 262 of the movable member 259 may be configured with a smooth outer surface, which may facilitate easy sliding of the plunger 262 within the collar 261 of the rigid member 258. The plunger 262 may be defined with a recess 269, which may extend from an end of the plunger 262 (i.e. the recess 269 extends within an inner solid structure of the plunger 262). As an example, the recess 269 may have a profile such as cylindrical, cuboidal and the like. However, the profile may be configured to, preferably, match with the profile of the heating element of the heater. The plunger 262 and the recess 269 defined within the plunger 262 may be configured to remove, e.g. scrape off, debris in the device 201 , simultaneously while facilitating disengaging the cap 210 and the body 209 of the device 201 .

[0344] The plurality of flexible engaging arms 260 may be configured to relatively extend with respect to an axial axis of the collar 261 , and in-turn to that of the tool 235. The plurality of flexible engaging arms 260 can extend either substantially straight (that is, parallelly or axially extended) from the collar 261 , or can be angularly extended with respect to the axial axis of the collar 261 . As apparent from Figure 10C, each of the plurality of flexible engaging arms 260 are angularly extended with respect to the axial axis of the tool 235 and are configured to incline towards the axial axis of the tool 235 (e.g. bend inwards or towards centre). The plurality of flexible engaging arms 260 is operable from a first condition (e.g. at angularly inclined towards the axial axis of the tool 235) to a second condition (e.g. at axially extended to be parallel to the axial axis of the tool 235).

[0345] As apparent in Figure 10D, the cleaning portion 302 of the tool comprises one or more cleaning elements 303, which extend from an end of the base element 263. The one or more cleaning elements 303 may be joined to the base element 263 (e.g. by adhesives for plastic or fibre cleaning elements and by welding or brazing for metal cleaning elements). The one or more cleaning elements 303 may be at least one of brushes or bristles. The one or more cleaning elements 303, may facilitate in cleaning the heating element 223 of the heater 204 (i.e. the cleaning elements 303 may facilitate in cleaning the aerosol forming article substrate and other debris adhering to the heating element 223). Cleaning of the heating element 223 facilitates in effective heat dissipation by the heating element 223 and, thus improving efficiency of the device 201 .

[0346] The tool 235 is insertable into the cap 210 of the device 201 , as apparent from Figure 1 1 . The insertion of the tool 235 can be performed through the opening 221 defined in the cap 210. The tool 235 may be insertable into the cap 210 upon removal (e.g. dislodging, ejecting, disposing and the like) of the consumable or a portion of the consumable that may be residing in the cavity 222. In the illustration of Figure 1 1 , the tool 235 is positioned such that, the plurality of flexible engaging arms 260 are configured to engage with the opening 221 in the cap 210 (e.g. in a position where the second enclosure 257 of the tool 235 is gripped by the user and coaxially positioned with the opening 221 defined in the cap 210). The plurality of flexible engaging arms 260 may slide into the cavity 222 through the opening 221 in the cap 210. At this instance, the movable member 259 is drawn to the first position (that is, away from the cap 210) so that, the plurality of flexible engaging arms 260 are introduced into the cavity in the first condition.

[0347] During engagement of the tool 235 with the device 201 , the element 272 disposed in the rigid member 258, facilitates the user to visualize the orientation of the tool 235 relative to the device 201 . The position of the element 272 in the tool 235, determines the orientation of the tool 235 for precisely securing the flexible arms 260 of the tool 235 within the cavity 222 of the cap 210, to disengage the cap 210 and the body 209. For the instance, the position of the element 272 aligning with a front face or a back face of the device 201 , corresponds to correct orientation of the tool 235 relative to the device 201 , which may facilitate in precisely securing the flexible engaging arms 260 (thus, the tool 235) with the cavity 222 of the cap 210. At this instance, the movable member 259 is drawn to the first position from the second position (i.e. if the movable member 259 is at the second position). During displacement of the movable member 259 to the first position (that is, away from the cap 210), the element 272 disengages from the slot 271 corresponding to the second position, and traverses within the slidable path 270 of the movable member 259. Then, the element 272 may engage with the slot 271 corresponding to the first position and hence, locks the movable member 259 in the first position, so that, the plurality of flexible engaging arms 260 are introduced into the cavity 222 in the first condition.

[0348] The plurality of flexible engaging arms 260 are configured to slide inside the cavity 222, through the opening 221 in the cap 210, until the collar 261 abuts a top surface of the cap 210, as apparent from Figure 12A. The collar 261 can be defined to exceed an outer diameter of the opening 221 of the cap 210, whereby the collar 261 is configured to restrict further movement of the tool 235 into the cap 210. Moreover, the plurality of flexible engaging arms 260 are configured such that, upon abutment of the collar 261 with the top surface of the cap 210, each of the plurality of engaging arms 260 is configured to engage with the rigid base region 253 of the cavity 222.

[0349] In some arrangements it is proposed that an end of the at least one flexible engaging arm of the plurality of flexible engaging arms 260 is configured to engage at least a portion of circumference of the cavity 222. During engagement with the cavity 222, the end of the at least one flexible engaging arm of the plurality of flexible engaging arms 260 may be configured to scrape debris deposited in the cavity 222 (e.g. a portion of an inner wall or walls of the cavity 222). Moreover, the plurality of flexible engaging arms 260 may be configured such that, upon abutment of the collar 261 with the top surface of the cap 210, the end of each of the plurality of engaging arms 260 defines a clearance with the rigid base region 253 of the cavity 222. The clearance between the end of each of the plurality of flexible engaging arms 260 and the rigid base region 253 of the cavity may assist in accommodating debris, scraped from the cavity 222. This clearance between each of the plurality of flexible engaging arms 260 and the rigid base region 253 may avoid impaction of the debris into other components of the cap and the device 201. The clearance between each of the plurality of flexible engaging arms 260 and the rigid base region 253 may be about 0.5mm to about 1.5mm. Preferably, the clearance may be 1 mm. However, the clearance may be varied based on requirement of degree of contact between the plurality of flexible engaging arms 260 and the cavity 222. In some embodiments, the clearance may be varied in accordance with the profile of each of the plurality of flexible engaging arms 260.

[0350] Each of the plurality of flexible engaging arms 260 may include a protruding tab 264, where the protruding tab 264 is configured to extend outwardly from an external surface of a respective flexible engaging arm of the plurality of flexible engaging arms 260. The protruding tab 264 is positioned away from the collar 261 in each of the plurality of flexible engaging arms 260. That is, the protruding tab 264 of each of the plurality of flexible engaging arms 260 is configured to be inserted into the cavity 222 before the collar 261 is abutted to the top surface of the cap 210. The plurality of flexible engaging arms 260 is configured to extend in the first condition, while the movable member 259 is operated to the first position, as can be seen in Figure 12B. [0351] In the present embodiment, at least one flexible engaging arm of the plurality of flexible engaging arms 260 is provided with a locating tab 267. The locating tab 267 may extend laterally (i.e. in a direction perpendicular to the longitudinal axis of the tool 235) from an external surface of at least one flexible engaging arm of the plurality of flexible engaging arms 260. The locating tab 267 may longitudinally extend (e.g. in the direction of longitudinal axis of the tool 235) from the collar 261 along at least one flexible engaging arm of the plurality of flexible engaging arms 260, till a defined length. The defined length of the locating tab 267 may be equal to depth of the notches 226, which are laterally disposed on the opening 221 (e.g. on a portion of circumference of the opening 221) in the cap 210. In an

embodiment, the locating tab 267 may extend from the collar 261 or a narrow gap may be defined between the collar 261 and the locating tab 267. The locating tab 267 may be receivable by at least one notch of the notches 226 in the cap 210, in at least one defined orientation. The at least one defined orientation may define alignment of the tool 235 with respect to the device 201 , for insertion of the tool 235 into the cap 210, to disengage the cap 210 and the body 209 of the device 201 .

[0352] The tool 235 may be oriented to align the locating tab 267 with at least one notch of the notches 226 in the cap 210. The locating tab 267 may also be profiled to match with profile of at least one notch of the notches 226, for the tool 235 to be insertable into in the opening 221 of the cap 210. Further, the locating tab 267 may be configured to restrict abutment of the collar 261 with the top surface of the cap 210 if there is any deviation in orientation of the locating tab 267 with at least one corresponding notch of the notches 226 in the cap 210.

[0353] Upon orientation of the tool 235 and alignment of the locating tab 267 with the at least one notch of the notches 226 in the cap 210, a portion of the tool 235 may be inserted into the cavity 222 and may be allowed for disengagement of the cap 210 and the body 209. On complete alignment of the locating tab 267 with the at least one notch of the notches 226 in the cap 210, the at least one notch of the notches 226 may define a dead stop (e.g. restrained from further longitudinal and lateral movement), as seen in Figure 12B. Also, the locating tab 267 may facilitate in engaging the protruding tab 264 with the at least one flexure bearing 254 of the body 209, on complete alignment with the at least one notch of the notches 226 in the cap 210. In the present embodiment, the cap 210 may be defined with two notches 226 at side face (i.e. lateral side) of the cap 210, and in-turn the device 201 . The locating tabs 267 on the at least one flexible engaging arm of the plurality of flexible engaging arms 260 are configured such that, when the locating tab 267 meets at least one notch of the notches 226, the tool 235 is considered to be aligned completely with the device 201 to disengage the cap 210 and the body 209.

[0354] In some embodiments, the locating tab 267 may also be accompanied by a visual marker 272, for visual indication of orientation of the tool 235 with respect to the device 201 (as apparent in Figures 1 1 and 12A). The visual marker 272 may be disposed in the collar 261 and may correspond to a visible end of the element 272 described above. Alternatively, the visual marker can simply be a mark provided on the collar, in the event that the element 272 is not provided. The visual marker facilitates visual indication of orientation of the tool 235 relative to the device 201 . The position of the visual marker 272 in the tool 235 determines the orientation of the tool 235 for precisely securing the plurality of flexible arms 260 within the cavity 222 of the cap 210, to disengage the cap 210 and the body 209. For the instance, position of the visual marker 272 aligned with a front face or a rear face of the device 201 may correspond to correct orientation of the tool 235 relative to the device 201 . This may facilitate the tool 235 in precisely securing the plurality of flexible engaging arms 260 with the cavity 222 of the cap 210, and the collar 261 may be abutted with the top surface of the cap 210.

[0355] Upon insertion of the tool having the plurality of flexible engaging arms 260 into the cap 210, the hook 255 of the at least one flexure bearing 254 is configured to engage the protruding tabs 264 of the plurality of flexible engaging arms 260, through the slit 252 of the cavity 222. By inserting the tool, the plurality of flexible engaging arms 260 are deformed, e.g. bent inwardly, to be positioned adjacent to the at least one flexure bearing 254. The hook 255 of the at least one flexure bearing 254 is received by the slit 252 in the cavity 222, in a locked condition, where the hook 255 is configured to restrain

disengagement of the cap 210. As the protruding tab 264 is configured to engage with the hook 255 of the at least one flexure bearing 254, the protruding tab 264 and in-turn the plurality of flexible engaging arms is configured to be deformed (that is, translated) to the first condition. At this condition, the cap 210 may not be disengaged (that is, dislodged or removed) from the body, in response to insertion of the tool 235 into the cavity 222 (that is, the rigid base region 253 of the cavity 222 is restrained by the hook 255 of the at least one flexure bearing 254).

[0356] The tool 235 may be operated by operating the movable member 259 from the first position to the second position (that is, towards the cap 210), through selective displacement of the second enclosure 257, as apparent from Figures 12A and 12B. During movement of the movable member 259 from the first position, at least a portion of the plunger 262 is configured to contact and trace the inner wall of the cavity 222 (e.g. along the inner wall, in similar sense to the end of at least one flexible engaging arm of the plurality of flexible engaging arms 260). The plunger 262 or at least a portion of the plunger 262 may be configured to scrape debris deposited on at least of circumferential portion of the cavity (e.g. inner wall). The scraped debris may be traversed along with the plunger 262, during movement of the movable member towards the second position, towards the rigid base region 253 of the cavity 222. On further displacement of the plunger 262 of the movable member 259, the recess 269 defined in the plunger 262, may be configured to enclose the heating element 223, (e.g. the recess 269 of the plunger 257 may contact the heating element 223, or a small clearance may be maintained between the recess 269 and outer surface of the heating element, during enclosing of the heating element). Preferably, a small clearance may be provided between the recess 269 and the heating element 223, to avoid any damage to the heating element 223. From the instance, since the recess 269 begins to enclose the heating element 223, at least a portion of the recess 269 (i.e. an end face of the recess), facilitates in removing (i.e. scraping) the debris deposited on the outer surface of the heating element 223, and thus cleaning the device 201 .

[0357] The operation of the movable member 259 to the second position is also configured to operate or translate (e.g. deform or displace) at least one flexible engaging arm of the plurality of flexible engaging arms 260 to the second condition from the first condition. In this respect, the protruding tab 254 of at least one flexible engaging arm of the plurality of flexible engaging arms 260 is configured to displace (e.g. deform outwardly or move about a width of the device 201 ) the hook 255 of the at least one flexure bearing 254 to an un-locked position. At this position, the hook 255 of the at least one flexure bearing 254 is displaced outwardly away from the slit 252 of the cavity 222 and the heating element 223 of the device 201 , as illustrated in Figure 13B).

[0358] The hook 255 of the at least one flexure bearing 254, upon displacement to the un-locked position, by the protruding tab 264, is configured to disengage (or move away) from the rigid base portion of the cavity 222, for lifting of the cap 210. In other words, hook 255 of the at least one flexure bearing 254 may be moved outwardly and thus are not situated in the slit 252 anymore, so that the locking of the least one flexure bearing 254 is released and the cap 210 is removable. As a result of this, the cap 210 may be disengaged ((that is, dislodged or removed) from the body by pulling force (e.g. upward force applied on the cap 210 and the tool 235, or downward force applied on the body), as apparent from Figure 14A.

[0359] Figure 14B illustrates disengagement of the cap 210 and the body, for exposure of a portion of the heating element 223 or the heater 204.

[0360] The disengagement of the cap 210 and the body of the device 201 and cleaning of the device 201 may be performed by the tool 235, and a method for such disengagement and cleaning is performed and initiated by inserting the tool 235 into the cap 210. The tool 235 through the plurality of flexible engaging arms 260 of the rigid member 258 is inserted into the cap 210, at the opening 221 defined in the top surface of the cap 210. The movable member 259 of the tool 235 is operated to the first position (that is, away from the cap 210) before the plurality of flexible engaging arms 260 can be inserted into the cap 210. The plurality of flexible engaging arms 260 of the rigid member 258 are configured to be insertable into the cap 210 in the first condition, to engage the slit 252 defined in the cavity 222 of the cap 210.

While, inserting the flexible engaging arms 260 into the cavity 222 of the device 201 , the visual indication marker or element 272 provided in the rigid member 259 provides an indication corresponding to orientation of the tool 201 relative to the device 201 , such that the tool 235 can be inserted in a defined orientation. The plurality of flexible engaging arms 260, in the cavity 222 of the cap 210, are held in the first condition by the at least one flexure bearing 254 defined in the body of the device 201 . At this point, the cap 210 may be partially disengaged, as the cap 210 may be retrained by the at least one flexure bearing 254, restraining the rigid base region 253 of the cap 210.

[0361] The movable member 259 of the tool 235 is then operated (e.g. moved or displaced) from the first position to the second position (that is, into the cavity 222 defined by the cap 210) such that, the plunger 262 of the movable member 259 contacts and traces the cavity 222 of the device 201 (e.g. the inner wall of cavity of the cap), during displacement of the movable member 259 from the first position. This tracing of the plunger 262 along the inner wall of the cavity 222, may facilitate in scraping the debris deposited on the inner wall of the cavity 222. Upon further displacement from the first position, the plunger 262 may contact the flexible engaging arms 260 and thus facilitates in operating the flexible engaging arms 260 to second condition from first condition, which facilitates in disengaging the cap 210 and the body 209. [0362] Operation of the movable member 259 from the first position to the second position also causes the plurality of flexible engaging arms 256 to be translated (e.g. deformed) to the second condition from the first condition. While the plunger 262 contacts with the flexible engaging arms 260, the recess 269 of the plunger 262 receives the heating element 223 (e.g. encloses the heating element). As the heating element 223 is enclosed, the recess 269 may contact the heating element 223 and thus may scrape off debris deposited on the heating element 223. The plunger 262 of the movable member 259 is configured to operate the plurality of flexible engaging arms 260 such that, the protruding tabs 264 of the plurality of flexible engaging arms 260 is configured to assist the slit 252 of the cavity 222 defined by the cap 210 to retain (e.g. regain) its original profile (that is, as though no external forces are acted upon). The retaining of the profile by the slit of the cavity 222 may performed by displacement of the hook 255 on the at least one flexure bearing 254 of the body 209. The plunger 262 of the movable member 259 is configured to operate the plurality of flexible engaging arms 260 such that, the protruding tabs 264 of the plurality of flexible engaging arms 260 is configured to displace the hook 255 of the at least one flexure bearing 254 from the slit 252. This operates the hook 255 of the at least one flexure bearing 254 from the locked position in the slit 252 to the un-locked position. This way, the slit 252 is unobstructed (that is, free to be displaced or moved or lifted) by the hook 255 of the at least one flexure bearing 254. At this point, the rigid base region 253 of the cavity 222 is disengaged by the at least one flexure bearing 254, thereby allowing disengagement of the cap 210 and the body.

[0363] In some embodiments, upon disengaging of the cap 210 and the body 209 from the device 201 , optionally the second enclosure 257 may be operated (i.e. disengaged or removed to expose the cleaning portion 302). Once, the second enclosure 257 is disengaged, the first enclosure 256 may be engaged, in order to enclose the cap removal portion 301 of the tool, such that the first enclosure 256 may be adapted as a gripping unit to operate the cleaning portion 302, by the user. The cleaning elements 303 of the cleaning portion 302 may be bought in contact with the heating element 223 (i.e. exposed as a result of disengaging the cap 210 and the body 209 of the device 201), and thus facilitating in cleaning the heating element 223 of the heater 204 (thus the device 201).

[0364] The features disclosed in the foregoing description, or in the following claims, or in the

accompanying drawings, expressed in their specific forms or in terms of a means for performing the disclosed function, or a method or process for obtaining the disclosed results, as appropriate, may, separately, or in any combination of such features, be utilised for realising the invention in diverse forms thereof.

[0365] While the invention has been described in conjunction with the exemplary embodiments described above, many equivalent modifications and variations will be apparent to those skilled in the art when given this disclosure. Accordingly, the exemplary embodiments of the invention set forth above are considered to be illustrative and not limiting. Various changes to the described embodiments may be made without departing from the spirit and scope of the invention. [0366] For the avoidance of any doubt, any theoretical explanations provided herein are provided for the purposes of improving the understanding of a reader. The inventors do not wish to be bound by any of these theoretical explanations.

[0367] Any section headings used herein are for organizational purposes only and are not to be construed as limiting the subject matter described.

[0368] Throughout this specification, including the claims which follow, unless the context requires otherwise, the words“have”,“comprise”, and“include”, and variations such as“having”,“comprises”, “comprising”, and“including” will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.

[0369] It must be noted that, as used in the specification and the appended claims, the singular forms“a,”

“an,” and“the” include plural referents unless the context clearly dictates otherwise. Ranges may be expressed herein as from“about” one particular value, and/or to“about” another particular value. When such a range is expressed, another embodiment includes from the one particular value and/or to the other particular value. Similarly, when values are expressed as approximations, by the use of the antecedent “about,” it will be understood that the particular value forms another embodiment. The term“about” in relation to a numerical value is optional and means, for example, +/- 10%.

[0370] The words "preferred" and "preferably" are used herein refer to embodiments of the invention that may provide certain benefits under some circumstances. It is to be appreciated, however, that other embodiments may also be preferred under the same or different circumstances. The recitation of one or more preferred embodiments therefore does not mean or imply that other embodiments are not useful, and is not intended to exclude other embodiments from the scope of the disclosure, or from the scope of the claims.

Claims

1 . A smoking substitute device comprising: a heater connected to a main body of the device; the device further including a cap covering at least a portion of the heater, wherein the cap is releasably engaged with a main body of the device, and wherein the cap is configured to be released from engagement with the main body of the device using a removal key.

2. A smoking substitute device according to claim 1 , wherein the cap is releaseably secured to the main body of the device by a retaining means.

3. A smoking substitute device according to claim 2, wherein the retaining means comprises: at least one flexible locking arm extending from the main body; and a locking protrusion disposed on each of the at least one locking arm, the locking protrusion configured to extend into a corresponding slot located in the cap.

4. A smoking substitute device according to claim 3, wherein each locking protrusion includes a hooked end of the corresponding locking arm.

5. A smoking substitute device according to claim 3 or claim 4, wherein the locking protrusion abuts a first end of the corresponding slot to limit an extent of movement of the cap relative to the main body, and to thereby prevent removal of the cap from the main body.

6. A smoking substitute device according to any preceding claim, wherein the cap includes a cavity for receiving at least a portion of a smoking substitute consumable.

7. A smoking substitute device according to claim 6, where the removal key is sized so that at least a portion of the removal key is received in the cavity to release the cap from the main body.

8. A smoking substitute device according to claim 6 or claim 7, wherein the slot is formed through a wall of the cavity.

9. A smoking substitute kit including a substitute smoking device according to any preceding claim, and including the removal key.

10. A smoking substitute kit according to claim 9, as dependent on claim 3, wherein the removal key includes at least one projection, wherein each of the at least one projection intrudes into the corresponding slot to disengage the locking protrusion from the corresponding slot.

1 1 . A smoking substitute kit according to claim 10, wherein the projection is located on an unlocking arm of the removal key.

12. A smoking substitute kit according to claim 10 or 1 1 , wherein the removal key includes two or more locking arms.

13. A smoking substitute kit according to claim 12, wherein the removal key includes a separator to hold the locking arms in a mutually separated position, to thereby disengage each corresponding locking protrusion from the corresponding slot.

14. A smoking substitute kit according to claim 13, wherein the separator is moveable relative to the locking arms.

15. A removal key for the smoking substitute kit according to any one of claims 9 to 14.

16. A tool for removing the cap from the body of the smoking substitute device of any one of the preceding claims, the tool comprising:

at least one unlocking arm;

an unlocking protrusion disposed on the unlocking arm, the unlocking protrusion is configured to displace a corresponding locking protrusion disposed on a locking arm extending from said body to disengage the locking protrusion from a slot in said cap.

17. A tool of claim 16, further comprises a cleaning means for cleaning the heating element.

18. A tool of claim 17, wherein the cleaning means comprises at least one cleaning bristle.

19. A tool of claim 17 or claim 18, further comprises a central rod, wherein the at least one unlocking arm extending along a longitudinal axis of the central rod in a first direction and the cleaning means extending in a second direction opposite to the first direction.

20. A tool of claim 19, further comprises a collar around the central rod having the unlocking arm extended in the first direction, the collar being movable between an insertion position and an unlocking position, wherein in the insertion position the at least one unlocking arm is allowed to flex and in the unlocking position the central rod prevents the flexing of the unlocking arm.

21 . A smoking substitute system, comprising:

the smoking substitute device of any one of claims 1 to 8; and

the tool of any one of claims 16 to 20.