Aerosolization Module

Abstract

An aerosolization module (40) removably insertable into the housing (20) of an aerosol generating device is disclosed. The aerosolization module (40) comprises a vibratable transducer (41) for aerosolizing a liquid aerosol-forming substrate and one or more conductive contacts (401) in electrical communication with the vibratable transducer (41). The one or more conductive contacts (401) are configured for removable electrical connection with corresponding contacts (201) of the housing (20) of the aerosol generating device. The aerosolization module (40) further comprises a membrane (42). The membrane (42) comprises an aerosol-generation zone (43). The vibratable transducer (41) is operatively coupled to the membrane (42) for vibrating the membrane in use. The membrane (42) is formed of a conductive material and a portion of the membrane forms at least one of the one or more conductive contacts.

Description

[Technical field]

[0001] The present disclosure relates to an aerosolization module for use in an aerosol generating device. The present disclosure also relates to an aerosol generating system or device including such an aerosolization module. Additionally, the present disclosure relates to a kit of parts that, when assembled, forms an aerosol generating device. [Background technology]

[0002] Known vibrating nebulizers for aerosolizing liquid aerosol-forming substrates employ a membrane with a distribution of nozzles. The membrane is coupled to a vibrable transducer, which is fixedly coupled to the controller and power supply of the nebulizer. An electrical signal provided by the controller to the transducer is converted by the transducer into a vibration output, which induces vibration of the membrane. When the membrane contacts the liquid aerosol-forming substrate, the vibrating action of the membrane forces the liquid aerosol-forming substrate through a nozzle to form aerosol droplets. The vibration of the membrane serves to generate the aerosol droplets. In this manner, such known vibrating nebulizers provide non-thermal aerosol generation. The term "non-thermal aerosol generation" as used herein refers to the aerosol droplets being formed from the liquid aerosol-forming substrate without the need for applying heat to the substrate. However, with continued use, the membrane of such known vibrating nebulizers may become clogged with residue from the substrate or external contaminants. This residue may affect the quality of the aerosol droplet pattern produced by the membrane. Cleaning the membrane to remove this residue may be difficult for several reasons. For example, the membrane is typically a fragile structure and therefore may be difficult to clean without causing permanent damage to the membrane. In addition, the membrane may also be difficult to access from outside the nebulizer. For example, the membrane may be recessed within the nebulizer housing to protect it from damage. These difficulties may result in a user discarding a vibrating nebulizer that may be perfectly functional in all respects except for having residue on the membrane. Summary of the Invention [Problem to be solved by the invention]

[0003] The present disclosure is directed to providing an aerosolization module for use in an aerosol generating device that addresses one or more of the problems set forth above. [Means for solving the problem]

[0004] According to one aspect of the disclosure, there is provided an aerosolization module removably insertable into a housing of an aerosol generating device, the aerosolization module comprising a vibratable transducer for aerosolizing a liquid aerosol-forming substrate and one or more conductive contacts in electrical communication with the vibratable transducer, the one or more conductive contacts being configured for removable electrical connection with corresponding contacts of the housing of the aerosol generating device.

[0005] As used herein, the term "vibrable transducer" is used to refer to a device configured to convert energy from an initial form to a different form, where the different form includes or consists of a vibration output.

[0006] As used herein, the term "aerosol-generating device" is used to describe a device that interacts with an aerosol-forming substrate to generate an aerosol. The aerosol-generating device is preferably a smoking device that interacts with an aerosol-forming substrate to generate an aerosol that is inhalable directly through the user's mouth into the user's lungs.

[0007] As used herein, the term "aerosol-forming substrate" refers to a substrate made of or including an aerosol-forming material capable of releasing volatile compounds upon heating to generate an aerosol.

[0008] As used herein, the term "liquid" refers to a substance provided in liquid form, and includes a substance provided in the form of a gel.

[0009] The feature of the aerosolization module being removably insertable into the housing of the aerosol generating device allows the aerosolization module to be removed from the housing of the device and replaced. Thus, if the aerosolization module becomes clogged with residue from the substrate or other debris with use, the aerosolization module can be removed from the housing and replaced. In this manner, the aerosol generating device may be reusable with other aerosolization modules. Providing one or more conductive contacts configured for removable electrical connection with corresponding contacts of the housing of the device allows an electrical signal to be transmitted from the housing to drive the transducer, and the removable electrical connectivity of the contacts facilitates easy removal and replacement of the aerosolization module. The use of conductive contacts configured for removable electrical connection with corresponding contacts of the housing of the device contrasts with known nebulizers that may use soldered wire connections intended to provide a permanent connection between the power source of the nebulizer and the transducer.

[0010] At least one of the one or more conductive contacts may form part of a vibratable transducer, in this manner, an electrical signal may be transmitted directly to the transducer.

[0011] Preferably, the aerosolization module may further comprise a membrane. The membrane may comprise an aerosol generation zone. The vibrable transducer may be operatively connected to the membrane to vibrate the membrane in use. When employing the aerosolization module as part of an aerosol generating device, a liquid aerosol-forming substrate provided to the aerosol generation zone of the membrane may be aerosolized through the vibration of the membrane. Advantageously, the aerosol generation zone may be provided with a number of nozzles for the passage of the liquid aerosol-forming substrate therethrough. As used herein, the term "nozzle" is used to refer to an opening, hole or aperture through the membrane that provides a passage for the liquid aerosol-forming substrate to travel through the membrane. By way of example and without limitation, during use of the aerosol generating device, the liquid aerosol-forming substrate may be brought into contact with a first side of the membrane. The vibration of the membrane may result in a portion of the liquid substrate being forced and expelled through the nozzle to be released as a spray of aerosol droplets from a second, opposite side of the membrane. The nozzles may be individually sized and arranged relative to one another to provide a predetermined aerosol droplet formation pattern.

[0012] The nozzles are preferably circular in shape. The use of circular nozzles is preferred because it maximizes the area to circumference ratio of each nozzle, thus reducing viscous drag forces and boundary layer build-up. However, the use of elliptical nozzles has also been found to provide acceptable performance in terms of the resulting aerosol droplet formation.

[0013] The membrane may be formed of any suitable material. By way of example and without limitation, the membrane may be formed of a polymeric material, thereby providing the advantage of reduced mass and inertia. However, the membrane may be formed of any other suitable material, such as a metallic material. The membrane may be a composite material of two or more different materials. The choice of material used for the membrane may be influenced by the particular liquid aerosol-forming substrate intended to be used in and aerosolized by the aerosolization module. For example, it is highly desirable to choose a material for the membrane that does not chemically react or decompose as a result of contact with the chosen liquid aerosol-forming substrate. By way of example only, the membrane may be formed of any of palladium, stainless steel, copper-nickel alloy, polyimide, polyamide, silicon, or aluminum nitride.

[0014] Advantageously, the membrane may be circular in shape when viewed in plan. A circular membrane has been found to be beneficial when the aerosolization module forms part of a hand-held, elongated aerosol generating device intended for use as a smoking device. However, the membrane may alternatively be rectangular in shape in plan.

[0015] The membrane may be formed of a conductive material. A portion of the membrane may form at least one of the one or more conductive contacts. In this manner, the membrane may itself serve as a means for electrically coupling the vibratable transducer to the housing of the aerosol-generating article. The one or more conductive contacts may comprise a first conductive contact and a second conductive contact. The first portion of the membrane may form the first conductive contact and the second portion of the membrane may form the second conductive contact.

[0016] The vibratable transducer may comprise at least one actuator. The actuator is preferably a piezoelectric actuator. Piezoelectric actuators are preferred as they are an energy-efficient, lightweight means of providing a vibration output from an electrical input. Piezoelectric actuators have a high efficiency of energy conversion from electrical to acoustic / mechanical output. Furthermore, piezoelectric actuators are available in a wide variety of materials and shapes. In the case of a piezoelectric actuator, inputting an electrical drive signal to the piezoelectric actuator will result in a mechanical output in the form of a vibration signal. As mentioned above, when the vibratable transducer of the aerosolization module is operably coupled to the membrane, the use of a piezoelectric actuator in or as the transducer provides an energy-efficient means of inducing vibration of the membrane to aerosolize the liquid aerosol-forming substrate. However, as an alternative to the use of a piezoelectric actuator, an actuator(s) including one or more of an electromagnetic element, a magnetostrictive element, or an electrostrictive element may also be employed in the vibratable transducer.

[0017] As mentioned above, when the vibratable transducer of the aerosolization module is operably coupled to the membrane, the vibratable transducer may comprise an annular actuator assembly coupled to a surface of the membrane to surround the aerosol-generation zone. The annular actuator assembly may comprise one or more actuators. The annular actuator assembly may comprise a single annular actuator. Alternatively, the annular actuator assembly may comprise two or more actuators arranged circumferentially relative to one another to define an annulus surrounding the aerosol-generation zone. As described in the preceding paragraph, the actuator(s) may take the form of one or more piezoelectric actuators. Alternatively, the actuator(s) may include one or more of an electromagnetic element, a magnetostrictive element, or an electrostrictive element.

[0018] In another embodiment applicable when the vibratable transducer of the aerosolization module is operably coupled to the membrane, the vibratable transducer may comprise a pair of annular actuator assemblies provided as a first annular actuator assembly and a second annular actuator assembly. Each of the first annular actuator assembly and the second annular actuator assembly may comprise one or more actuators. Furthermore, the first annular actuator assembly and the second annular actuator assembly may be disposed coupled to opposing surfaces of the membrane such that an annular portion of the membrane is constrained between the first annular actuator assembly and the second annular actuator assembly, the annular portion surrounding the aerosol generation zone. The one or more conductive contacts comprise one or more first conductive contacts in electrical communication with the first annular actuator assembly and one or more second conductive contacts in electrical communication with the second annular actuator assembly. By constraining the opposing surfaces of the membrane between the first annular actuator assembly and the second annular actuator assembly, the membrane can be gripped between the actuator assemblies, whereby vibration output from the actuator assemblies is efficiently transferred to the membrane to induce vibration of the membrane. Either or both of the first and second annular actuator assemblies may comprise a single annular actuator. Alternatively, either or both of the first and second actuator assemblies may comprise two or more actuators disposed circumferentially relative to one another to define an annulus. As described in the preceding paragraph, the actuator(s) may take the form of one or more piezoelectric actuators. Alternatively, the actuator(s) may include one or more of an electromagnetic element, a magnetostrictive element, or an electrostrictive element.

[0019] Advantageously, both the first and second conductive contacts may be disposed adjacent to each other. The adjacent positioning of the first and second conductive contacts helps to facilitate reliable electrical coupling of the contacts of the aerosolization module with the corresponding contacts of the housing of the aerosol generation device. Preferably, the first and second conductive contacts may be located on a common surface of the aerosolization module. Providing the first and second conductive contacts on such a common surface again helps to facilitate reliable electrical coupling of the contacts of the aerosolization module with the corresponding contacts of the housing of the aerosol generation device. In a first embodiment, the first and second conductive contacts may be located on a peripheral side of the aerosolization module, in this scenario the peripheral side forms the "common surface". In a second embodiment, the first and second conductive contacts may be located on the top or bottom surface of the aerosolization module, in this scenario the top or bottom surface forms the "common surface". The upper or lower surface may be or may include one or both surfaces of the vibratable transducer and the membrane. The terms "upper" and "lower" are used in a relative sense.

[0020] At least one of the one or more conductive contacts may comprise a planar contact area. The use of a planar contact area on the one or more conductive contacts facilitates a sliding fit between the planar contact area of ​​each conductive contact and a corresponding contact on the housing of the aerosol generating device. Such facilitation of a sliding fit is consistent with the property of the aerosolization module being removably insertable into the housing of the aerosol generating device. At least one of the one or more conductive contacts may form part of a resilient connector. The use of a resilient connector may facilitate a reliable electrical connection between the conductive contact of the aerosolization module and the corresponding contact on the housing of the aerosol generating device. To further explain, the resilience of the connector may result in each conductive contact being forced against the corresponding contact on the housing.

[0021] In a second aspect of the present disclosure, an aerosol generation system is provided. The aerosol generation system comprises an aerosolization module as generally described with respect to the first aspect of the present disclosure. The aerosol generation system further comprises an elongated housing, the elongated housing containing a power source and one or more conductive contacts corresponding to the one or more conductive contacts of the aerosolization module. The elongated housing is configured to removably receive the aerosolization module to establish a releasable electrical connection between the housing and the corresponding conductive contacts of the aerosolization module, whereby the elongated housing is electrically coupled to the vibratable transducer. Assembly of the aerosolization module with the elongated housing forms an aerosol generation device.

[0022] In this manner, the elongated housing is electrically coupled to the vibratable transducer of the aerosolization module via corresponding conductive contacts of the housing and the aerosolization module, and in response, the power source may transmit power to the vibratable transducer of the aerosolization module via the corresponding contacts.

[0023] In addition, the aerosol generation system may also include a controller that is connectable to the power source and the vibratable transducer, the controller configured to generate a drive signal for the vibratable transducer. In one embodiment, the controller may be contained within the elongated housing, in which case the drive signal generated by the controller may be communicated to the vibratable transducer via corresponding conductive contacts of the housing and the aerosolization module. Having both the power source and the controller within the elongated housing may help reduce the complexity and cost of the aerosolization module. In one alternative, the controller may form part of the aerosolization module. In this alternative scenario, the power source may provide power to the controller via corresponding conductive contacts of the housing and the aerosolization module, thereby enabling the controller (which is part of the aerosolization module) to generate and communicate the drive signal to the vibratable transducer. Having the controller part of the aerosolization module may also enable the use of different aerosolization modules, each configured to generate a distinct aerosol emission pattern, depending on the configuration of the controller of each aerosolization module. The term "controller" encompasses control electronics and processor(s) configured for use in generating a drive signal for a vibratable transducer, as well as any computer-readable medium storing instructions for use in generating a drive signal. By way of example, the controller may take the form of control electronics and a non-transitory computer-readable medium (such as a computer memory module), where the control electronics comprises a control unit coupled to or containing the non-transitory computer-readable medium. The control unit may itself contain or be coupled to a computer processor. The non-transitory computer-readable medium may contain instructions for use in generating a drive signal.

[0024] The power source is preferably rechargeable, and by way of example may include a lithium ion battery.

[0025] In this second embodiment, the aerosolization module forms a replaceable component of the aerosol generation system. The ability to remove and replace the aerosolization module from the elongated housing comes from the presence of a removable electrical connection between corresponding conductive contacts of the aerosolization module and the elongated housing.

[0026] The aerosol generation system preferably forms a smoking system configured for non-thermal generation of inhalable aerosols. Since no heat is used in non-thermal aerosol generation, the possibility of generating harmful compounds is reduced, since harmful compounds are usually associated with chemical reactions that occur at higher temperatures. However, as an alternative, the aerosol generation system may also comprise a heater element configured to apply heat to the liquid aerosol-forming substrate. Such a heater element may conveniently form part of the aerosolization module.

[0027] The elongated housing may be sized and shaped to allow the housing to be handheld by a user. The use of an elongated housing corresponds to the geometric profile associated with traditional cigarettes and various e-cigarettes.

[0028] The housing may have a first housing portion and a second housing portion, the first housing portion containing the power source and the second housing portion comprising the mouthpiece. The corresponding axial mating ends of the first housing portion and the second housing portion may be configured to interlock with each other. The axial mating ends of either the first housing portion or the second housing portion may comprise a seat for receiving the aerosolization module. Interlocking the corresponding axial mating ends of the first housing portion and the second housing portion together may facilitate secure interlocking of the aerosolization module with the housing. In use, a user may engage their mouth with the mouthpiece, thereby inhaling aerosol droplets emitted from the aerosolization module. In one embodiment, the first housing portion and the second housing portion may be hingedly connected to each other. Alternatively or additionally, each of the first housing portion and the second housing portion may comprise a magnetically attractive member, whereby the corresponding axial mating ends of the first housing portion and the second housing portion are magnetically attracted to each other, thereby securely interlocking the aerosolization module with the housing. By "magnetically attractive member" is meant a member that generates a magnetic field (i.e., a magnet) or a member that is magnetically attracted to a magnetic field. The magnetically attractive member of at least one of the first and second housing parts is preferably a magnet. Conveniently, the magnetically attractive members of the first and second housing parts are magnets of opposite polarity.

[0029] At least one of the conductive contacts of the housing may be located within the seat. In this manner, properly positioning the aerosolization module within the seat will result in an electrical connection between the corresponding conductive contacts of the aerosolization module and the elongated housing. The seat and the aerosolization module may be keyed to one another such that the aerosolization module is receivable within the seat in a predetermined orientation. The keying of the seat and the aerosolization module to one another may provide additional assurance that the module can be received within the seat of the housing such that the corresponding electrical contacts of the module and the housing are electrically connected to one another.

[0030] The sidewall of the elongated housing may include an opening, which defines an access opening to a cavity extending into the housing. One or more conductive contacts of the housing may be located within the cavity. The corresponding conductive contacts of the housing and the aerosolization module may also be configured such that insertion of the aerosolization module into the cavity results in an electrical connection between the corresponding contacts of the housing and the aerosolization module. The provision of such an opening in the sidewall of the housing facilitates the aerosolization module being slidably inserted into (or removed from) the elongated housing. The system may further include a cradle configured to receive the aerosolization module, the cradle being removably insertable into the cavity via the access opening. The cradle will act as a holder for the aerosolization module. The cradle and the aerosolization module may be keyed to one another such that the aerosolization module is receivable into the cradle in a predetermined orientation. The keying of the cradle and the aerosolization module to each other may provide additional assurance that the module is received in the cradle in a position such that upon insertion of the cradle into the cavity, an electrical connection between the aerosolization module and the corresponding contacts of the elongated housing is assured. The cradle may be slidably coupled to the elongated housing. In addition, either or both of the cradle and the housing may be configured to prevent decoupling of the cradle from the housing. In one embodiment, one of the cradle or the housing may include one or more lugs adapted to engage with corresponding portions of the other of the cradle or the housing to prevent complete decoupling of the cradle from the housing. Preferably, the cradle may be contoured to define a substantially flush fit with the sidewalls of the elongated housing after insertion of the cradle into the cavity. Providing a substantially flush fit of the cradle with the sidewalls of the elongated housing may ensure that a user can hold the elongated housing without discomfort.

[0031] The aerosol generating system may further comprise a reservoir of liquid aerosol-forming substrate. The reservoir of liquid aerosol-forming substrate may form part of the aerosolization module, the reservoir being in fluid communication with the vibratable transducer. In this way, removal and replacement of the aerosolization module results in the system being provided with both a new vibratable transducer and a new reservoir of liquid aerosol-forming substrate. Alternatively, the reservoir of liquid aerosol-forming substrate may be provided as a cartridge distinct from the aerosolization module, the cartridge being removably insertable into the housing, whereby the reservoir is in fluid communication with the vibratable transducer after the cartridge is inserted into the housing and the aerosolization module is received therein. Providing such a cartridge removably insertable into the housing and distinct from the aerosolization module allows the reservoir of liquid aerosol-forming substrate to be replaced with a new one, separate from the aerosolization module.

[0032] The liquid aerosol-forming substrate employed may take many different forms. The following paragraphs describe various exemplary, non-limiting materials and compositions for the liquid aerosol-forming substrate.

[0033] The liquid aerosol-forming substrate may comprise nicotine. The nicotine-containing liquid aerosol-forming substrate may be a nicotine salt matrix. The liquid aerosol-forming substrate may comprise plant-derived material. The liquid aerosol-forming substrate may comprise tobacco. The liquid aerosol-forming substrate may comprise homogenized tobacco material. The liquid aerosol-forming substrate may comprise a non-tobacco containing material. The liquid aerosol-forming substrate may comprise homogenized plant-derived material.

[0034] The liquid aerosol-forming substrate may include at least one aerosol former. The aerosol former is any suitable known compound or mixture of compounds that facilitates the formation of a dense and stable aerosol upon use. Suitable aerosol formers are known in the art and include, but are not limited to, polyhydric alcohols (such as triethylene glycol, 1,3-butanediol, glycerin, etc.), esters of polyhydric alcohols (such as glycerol monoacetate, diacetate, or triacetate, etc.), and aliphatic esters of mono-, di-, or polycarboxylic acids (such as dimethyl dodecanedioate, dimethyl tetradecanedioate, etc.). The aerosol former may be a polyhydric alcohol or a mixture thereof (such as triethylene glycol, 1,3-butanediol, glycerin, etc.). The liquid aerosol-forming substrate may include other additives and ingredients (such as flavoring agents).

[0035] The liquid aerosol-forming substrate may comprise water.

[0036] The liquid aerosol-forming substrate may comprise nicotine and at least one aerosol former. The aerosol former may comprise glycerin. The aerosol former may comprise propylene glycol. The aerosol former may comprise both glycerin and propylene glycol. The liquid aerosol-forming substrate may have a nicotine concentration of about 2% to about 10%.

[0037] Preferably, the corresponding contacts of the elongated housing and the aerosolization module may be configured to define a slidable interface between the corresponding contacts. The provision of such a slidable interface is consistent with the property of the aerosolization module being removably insertable into the elongated housing of the aerosol generation device. By way of example, the conductive contacts of either the elongated housing or the aerosolization module may comprise a planar contact area, as described above with respect to the first aspect of the present disclosure.

[0038] Conveniently, at least one of the one or more conductive contacts of one of the elongated housing or the aerosolization module forms part of a resilient connector. The resilient connector may be configured to resiliently deform upon contact with a corresponding contact of the other of the elongated housing or the aerosolization module. As described above with respect to the first aspect, the use of a resilient connector may facilitate a reliable electrical connection between corresponding conductive contacts of the aerosolization module and the elongated housing.

[0039] In a third aspect of the present disclosure, a kit of parts is provided which, when assembled, forms an aerosol generating device. The parts include a first aerosolization module and a second aerosolization module, each of the first aerosolization module and the second aerosolization module according to the first aspect of the present disclosure described above. The parts further include an elongated housing. The elongated housing includes a power source and one or more conductive contacts corresponding to the one or more conductive contacts of the aerosolization module. The elongated housing is configured to removably receive one of the first aerosolization module and the second aerosolization module to establish a removably electrical connection between the housing and the corresponding conductive contacts of the respective aerosolization module, whereby the elongated housing is electrically coupled to the vibratable transducer. The first aerosolization module and the second aerosolization module are mutually interchangeable within the elongated housing so as to be removably received within the elongated housing. The first aerosolization module is configured to generate a first aerosol emission pattern and the second aerosolization module is configured to generate a second aerosol radiation pattern, the first aerosol emission pattern and the second aerosol emission pattern being different from each other. Providing such a kit allows a user to switch between the first aerosolization module and the second aerosolization module according to the user's preferred aerosol emission pattern. The first aerosol emission pattern and the second aerosol emission pattern may differ in one or more of the following characteristics: aerosol droplet size, and aerosol droplet density (i.e., number of aerosol droplets per unit volume).

[0040] In other embodiments, the kit may include an additional aerosolization module having a different aerosol emission pattern than either the first aerosolization module or the second aerosolization module, thus providing the user with additional flexibility to experience different aerosol emission patterns.

[0041] The present invention is defined in the claims. However, below is provided a non-exhaustive list of non-limiting examples. Any one or more of the features of these examples may be combined with any one or more features of any other example, embodiment, or aspect described herein.

[0042] Example 1: An aerosolization module removably insertable into a housing of an aerosol generating device, the aerosolization module comprising a vibratable transducer for aerosolizing a liquid aerosol-forming substrate, and one or more conductive contacts in electrical communication with the vibratable transducer, the one or more conductive contacts being configured for removable electrical connection with corresponding contacts in the housing of the aerosol generating device. Example 2: An aerosolization module as described in example 1, wherein at least one of the one or more conductive contacts forms part of a vibratable transducer. Example 3: An aerosolization module as described in either Example 1 or Example 2, wherein the aerosolization module further comprises a membrane, the membrane comprising an aerosol generation zone, and a vibratable transducer operably coupled to the membrane for vibrating the membrane in use. Example 4: An aerosolization module as described in Example 3, wherein the aerosol-generation zone is provided with a plurality of nozzles for the passage of a liquid aerosol-forming substrate therethrough. Example 5: An aerosolization module described in either Example 3 or Example 4, wherein the membrane is formed of a conductive material and a portion of the membrane forms at least one of the one or more conductive contacts. Example 6: An aerosolization module as described in Example 5, wherein the one or more conductive contacts comprise a first conductive contact and a second conductive contact, a first portion of the membrane forming the first conductive contact and a second portion of the membrane forming the second conductive contact. Example 7: An aerosolization module according to any one of Examples 1 to 6, wherein the vibratable transducer comprises at least one actuator. Example 8: An aerosolization module described in any one of Examples 3 to 6, wherein the vibrable transducer comprises an annular actuator assembly coupled to the surface of the membrane and surrounding the aerosol generation zone, the annular actuator assembly comprising one or more actuators. Example 9: The aerosolization module as described in Example 8, wherein the annular actuator assembly comprises a single annular actuator. Example 10: An aerosolization module as described in Example 8, wherein the annular actuator assembly comprises two or more actuators circumferentially disposed relative to one another to define an annulus surrounding the aerosol-generation zone. Example 11: An aerosolization module described in any one of Examples 3 to 10, wherein the vibrable transducer comprises a pair of annular actuator assemblies provided as a first annular actuator assembly and a second annular actuator assembly, each of the first annular actuator assembly and the second annular actuator assembly comprising one or more actuators, the first annular actuator assembly and the second annular actuator assembly being arranged to couple to opposing surfaces of the membrane, whereby an annular portion of the membrane is constrained between the first annular actuator assembly and the second annular actuator assembly, the annular portion surrounding the aerosol generation zone, and the one or more conductive contacts comprising one or more first conductive contacts in electrical communication with the first annular actuator assembly and one or more second conductive contacts in electrical communication with the second annular actuator assembly. Example 12: The aerosolization module of Example 11, wherein either or both of the first annular actuator assembly and the second annular actuator assembly comprise a single annular actuator. Example 13: An aerosolization module as described in Example 11, wherein either or both of the first annular piezoelectric assembly and the second annular piezoelectric assembly have two or more piezoelectric actuators arranged circumferentially relative to each other to define an annular portion. Example 14: An aerosolization module described in any one of Examples 11 to 13, wherein the first conductive contact and the second conductive contact are disposed adjacent to each other. Example 15: An aerosolization module described in any one of Examples 11 to 14, wherein the first conductive contact and the second conductive contact are located on a common surface of the aerosolization module. Example 16: The aerosolization module of Example 15, wherein the first conductive contact and the second conductive contact are located on a peripheral side of the aerosolization module. Example 17: The aerosolization module of Example 15, wherein the first conductive contact and the second conductive contact are located on the top or bottom surface of the aerosolization module. Example 18: An aerosolization module described in any one of Examples 1 to 17, wherein at least one of the one or more conductive contacts has a planar contact area. Example 19: An aerosolization module described in any one of Examples 1 to 18, wherein at least one of the one or more conductive contacts forms part of an elastic connector. Example 20: An aerosol generation system comprising an aerosolization module according to any one of Examples 1 to 19, and an elongated housing including a power source and one or more conductive contacts corresponding to one or more conductive contacts of the aerosolization module, wherein the elongated housing is configured to removably receive the aerosolization module to establish a removable electrical connection between the housing and corresponding conductive contacts of the aerosolization module, whereby the elongated housing is electrically coupled to a vibratable transducer, and wherein assembly of the aerosolization module with the elongated housing forms an aerosol generation device. Example 20a: An aerosol generating device comprising an aerosolization module described in any one of Examples 1 to 19, and an elongated housing including a power source and one or more conductive contacts corresponding to one or more conductive contacts of the aerosolization module, wherein the elongated housing is configured to removably receive the aerosolization module to establish a removable electrical connection between the housing and corresponding conductive contacts of the aerosolization module, thereby electrically connecting the elongated housing to a vibrable transducer. Example 21: An aerosol generation system or device as described in Example 20 or Example 20a, wherein the system or device further comprises a controller connectable to the power source and the vibrable transducer, the controller configured to generate a drive signal for the vibrable transducer. Example 22: An aerosol generating system or device as described in Example 21, wherein the elongated housing contains a controller, and when the aerosol generating device is in use, a drive signal generated by the controller is communicated to the vibrable transducer via corresponding conductive contacts of the housing and the aerosolization module. Example 23: An aerosol generation system or device as described in Example 21, wherein the aerosol generation module is provided with a controller, and when the aerosol generation device is in use, a power source supplies power to the controller via corresponding conductive contacts of the housing and the aerosolization module. Example 24: An aerosol generation system or device described in any one of Examples 20 to 23, wherein the housing has a first housing portion and a second housing portion, the first housing portion comprising a power source, the second housing portion comprising a mouthpiece, corresponding axial mating ends of the first housing portion and the second housing portion are configured to be connected to each other, and the axial mating end of the first housing portion or the second housing portion comprises a seat for receiving an aerosolization module. Example 25: An aerosol generating system or device as described in Example 24, wherein the first housing part and the second housing part are hingedly connected to each other. Example 26: An aerosol generation system or device described in either Example 24 or Example 25, wherein each of the first housing portion and the second housing portion is provided with a magnetic attraction member, whereby corresponding axial mating ends of the first housing portion and the second housing portion are magnetically attracted to each other, thereby firmly connecting the aerosolization module to the housing. Example 27: An aerosol generating system or device described in any one of Examples 24 to 26, wherein at least one of the one or more conductive contacts of the housing is located within the seat. Example 28: An aerosol generation system or device described in any one of Examples 24 to 27, wherein the seat and the aerosolization module are keyed to each other such that the aerosolization module can be received in the seat in a predetermined orientation. Example 29: An aerosol generation system or device described in any one of Examples 20 to 23, wherein the side wall of the elongated housing has an opening defining an access opening to a cavity extending within the housing, one or more conductive contacts of the housing are located within the cavity, and corresponding conductive contacts of the housing and the aerosolization module are configured such that insertion of the aerosolization module into the cavity results in an electrical connection between the corresponding contacts of the housing and the aerosolization module. Example 30: An aerosol generation system or device as described in Example 29, further comprising a cradle configured to receive the aerosolization module, the cradle being removably insertable into the cavity via the access opening. Example 31: An aerosol generation system or device as described in Example 30, wherein the cradle and the aerosolization module are keyed to each other such that the aerosolization module can be received in the cradle in a predetermined orientation. Example 32: An aerosol generation system or device described in either Example 30 or Example 31, wherein the cradle is slidably connected to the elongated housing. Example 33: An aerosol generating system or device described in any one of Examples 30 to 32, wherein either or both of the cradle and the housing are configured to prevent detachment of the cradle from the housing. Example 34: An aerosol generating system or device described in any one of Examples 30 to 33, wherein the cradle is contoured to define a substantially flush fit with the side wall of the elongated housing after insertion of the cradle into the cavity. Example 35: An aerosol-generating system or device according to any one of Examples 20 to 34, further comprising a reservoir of liquid aerosol-forming substrate. Example 36: An aerosol-generating system or device as described in Example 35, wherein the reservoir of liquid aerosol-forming substrate forms part of the aerosolization module, the reservoir being in fluid communication with a vibratable transducer. Example 37: An aerosol generating system or device as described in Example 35, wherein the reservoir of the liquid aerosol-forming substrate is provided as a cartridge separate from the aerosolization module, and the cartridge is removably insertable into the housing, whereby the reservoir is in fluid communication with the vibrable transducer after the cartridge is inserted into the housing and the aerosolization module is assembled with the housing. Example 38: An aerosol generation system or device described in any one of Examples 20 to 37, wherein corresponding contacts of the elongated housing and the aerosolization module are configured to define a slidable interface between the corresponding contacts. Example 39: An aerosol generation system or device described in any one of Examples 20 to 38, wherein at least one of one or more conductive contacts of one of the elongated housing or the aerosolization module forms part of an elastic connector, the elastic connector being configured to elastically deform upon contact with a corresponding contact of the other of the elongated housing or the aerosolization module. Example 40: A kit of parts, the parts when assembled to form an aerosol generation device, the parts including a first aerosolization module and a second aerosolization module, each of the first aerosolization module and the second aerosolization module comprising an aerosolization module according to any one of Examples 1-19, and an elongated housing, the elongated housing including a power source and one or more conductive contacts corresponding to the one or more conductive contacts of the aerosolization module, the elongated housing configured to electrically connect the first aerosolization module to the corresponding conductive contacts of the housing and the respective aerosolization module, the elongated housing configured to electrically connect the first aerosolization module to the corresponding conductive contacts of ... a first aerosolization module and a second aerosolization module, whereby the elongated housing is electrically coupled to the vibratable transducer, the first aerosolization module and the second aerosolization module are mutually interchangeable within the elongated housing such that they are removably received within the elongated housing, the first aerosolization module is configured to generate a first aerosol emission pattern and the second aerosolization module is configured to generate a second aerosol emission pattern, the first aerosol emission pattern and the second aerosol emission pattern being different from each other.

[0043] The embodiments will now be further described with reference to the following figures: [Brief description of the drawings]

[0044] [Figure 1] FIG. 1 is a schematic diagram of a first embodiment of an aerosol generation system. [Diagram 2] FIG. 2 is a plan view of a membrane of an aerosolization module used in the aerosol generation system of FIG. [Figure 3a] FIG. 3a is a perspective view of the underside of a first embodiment of an aerosolization module suitable for use in the aerosol generation system of FIG. [Figure 3b] FIG. 3b is a top perspective view of the aerosolization module of FIG. 3a. [Figure 4] Figure 4 is an exploded view of the upper portion of an aerosol generating device incorporating the aerosolization module of Figures 3a and 3b, where the module is positioned between the cylindrical wall of the device's housing and the mouthpiece. This view illustrates the removable electrical connection between the conductive contacts of the housing and the aerosolization module. [Figure 5a] FIG. 5a is a perspective view of the underside of a second embodiment of an aerosolization module suitable for use in the aerosol generation system of FIG. [Figure 5b] FIG. 5b is a top perspective view of the aerosolization module of FIG. 5a. [Figure 6] FIG. 6 is a perspective view of an aerosol generation device including a slidable cradle for receiving the aerosolization module of FIGS. 5a and 5b. [Figure 7] FIG. 7 is a cross-sectional view of the aerosol generation device of FIG. 6 illustrating a removable electrical connection between the device housing and the conductive contacts of the aerosolization module when the cradle is inserted inside the device housing. [Figure 8] FIG. 8 is a plan view of a third embodiment of an aerosolization module. [Figure 9] FIG. 9 is a schematic diagram of a second embodiment of an aerosol generating system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0045] FIG. 1 is a schematic diagram of a first embodiment of an aerosol generation system 10. The aerosol generation system 10 is a smoking system for generating an inhalable aerosol 11. The system 10 includes an elongated housing 20, a cartridge 30, and an aerosolization module 40. In the illustrated and described embodiment, the elongated housing 20 is generally cylindrical and formed of a polymeric material. The cartridge 30 is removably receivable within the elongated housing 20, as will be described in more detail in the following paragraphs. Similarly, in the embodiment shown in FIG. 1, the aerosolization module 40 is also removably receivable within the housing 20. The cartridge 30 and the aerosolization module 40 are replaceable components of the aerosol generation system 10. As a result, the elongated housing 20 is reusable with different aerosolization modules 30 and cartridges 40. When the cartridge 30 and the aerosolization module 40 are assembled within the elongated housing 20, the combination of the housing, cartridge, and aerosolization module collectively form an aerosol generation device.

[0046] The elongated housing 20 contains a power source 21, a controller 22, and a liquid delivery assembly 23. The elongated housing 20 has a cylindrical portion 20a and a mouthpiece portion 20b. The mouthpiece portion 20b is fitted to one end of the cylindrical portion 20a to form the mouth end of the elongated housing 20. The power source 21 is coupled to the controller 22 to provide power thereto. In the embodiment shown, the power source 21 is a rechargeable battery that serves as the power source. In the embodiment shown and described, the controller 22 takes the form of control electronics. The controller 22 also incorporates a memory module 22a that contains instructions accessible by a processor (not shown) of the controller to control the operation of the aerosolization module 40. The controller 22 is configured to generate an electrical drive signal that is transmitted along wires or similar conductive members to conductive contacts 201 in the housing 20. The conductive contacts 201 of the housing 20 removably mate with corresponding conductive contacts 401 of the aerosolization module 40. The nature of various exemplary interfaces between the housing 20 and the corresponding conductive contacts 201, 401 of the aerosolization module 40 are described in the following paragraphs.

[0047] The cartridge 30 includes a reservoir 31 of liquid aerosol-forming substrate. The liquid aerosol-forming substrate contains nicotine. When the cartridge 30 is received in the elongated housing 20, the cartridge is fluidly connected to the liquid supply assembly 23. The liquid supply assembly 23 has the form of a wicking material extending between the cartridge 30 and the aerosolization module 40 so as to progressively supply the liquid aerosol-forming substrate from the reservoir 31 to the aerosolization module. In one alternative (not shown), the liquid supply assembly 23 is a pump powered by the power source 21. In a further alternative (not shown), the liquid supply assembly 23 forms part of the cartridge 30.

[0048] The aerosolization module 40 comprises a vibratable transducer 41 and a membrane 42. The vibratable transducer 41 comprises a pair of annular piezoelectric actuator assemblies 41U, 41L. The annular actuator assemblies 41U, 41L are coupled to opposing surfaces of the membrane 42 and secure an annular portion of the membrane between them. Each annular actuator assembly 41U, 41L is formed of a single, ring-shaped, single piezoelectric actuator. In an alternative (not shown), each annular actuator assembly 41U, 41L is instead formed of two or more piezoelectric actuators coupled together and arranged circumferentially to collectively define a ring-shaped configuration. In a further alternative (not shown), the vibratable transducer 41 comprises a single piezoelectric actuator assembly, e.g., one of the assemblies 41U, 41L.

[0049] When the aerosolization module 40 is received in the elongated housing 20, the conductive contacts 201 of the housing 20 are in contact with and in electrical communication with the conductive contacts 401 of the aerosolization module 40. As illustrated diagrammatically in FIG. 1 and apparent from the preceding paragraphs, the electrical contacts between the corresponding contacts 201, 401 of the housing 20 and the aerosolization module 40 are non-permanent, so that the aerosolization module may be removed from the housing. This allows the aerosolization module 40 to be reinserted or replaced (as indicated by the double-headed arrow in FIG. 1) with a replacement aerosolization module. Although not shown in the figures, the replacement aerosolization module may be adapted to generate an aerosol emission pattern different from that generated by the original aerosolization module.

[0050] FIG. 2 shows a plan view of the membrane 42 of the aerosolization module 40, i.e., as viewed in the direction of arrow A in FIG. 1. For convenience, the pair of annular actuator assemblies 41U, 41L are omitted from FIG. 2. In the embodiment shown and described, the membrane 42 is formed of a polymeric material. However, as mentioned above, other materials may be selected for the membrane 42, the membrane material being a material that has minimal or no chemical reactivity with the composition of the liquid aerosol-forming substrate. The membrane 42 is circular in plan view to correspond to the annular nature of the actuator assemblies 41U, 41L. However, in alternative embodiments (not shown), the membrane 42 may be of any other shape (e.g., rectangular) when viewed in plan. The membrane 42 has an aerosol-generation zone 43 (the periphery of which is represented by a dashed line in FIG. 2). The aerosol-generation zone 43 is provided with a number of nozzles 44 (represented by a dot pattern in FIG. 2). The nozzles 44 are in the form of holes extending through the thickness of the membrane 42. An annular gap 45 exists between the periphery of the membrane 42 and the periphery of the aerosol-generation zone 43. The annular gap 45 provides space that allows the upper and lower annular actuator assemblies 41U, 41L to press against opposing surfaces of the membrane 42. The terms "upper" and "lower" are used in a relative sense only to describe the locations of the actuator assemblies 41U, 41L relative to each other and to the membrane 42.

[0051] Figures 3a and 3b show perspective views of a first embodiment of an aerosolization module 40. Figure 4 illustrates how the aerosolization module 40 of Figures 3a, 3b is positioned between the cylindrical portion 20a and the mouthpiece portion 20b of the elongated housing 20 so as to provide a removable electrical connection between the housing 20 and the aerosolization module 40.

[0052] The conductive contacts 401 of the aerosolization module 40 of FIGS. 3a and 3b are formed by a conductive plate 401p defined on the bottom surface of the lower actuator assembly 41L. L , 401p U , 401n L , 401nU Plate 401p L and 401n L is connected to electrode 46L of lower actuator assembly 41L. L , 401n L , electrode 46L functions to deliver an electrical drive signal generated by controller 22 to lower actuator assembly 41L of vibrable transducer 41. U , 401n U Each of the metal cores 47 is connected to its respective plate 401p along the height of the aerosolization module 40. U , 401n U and connects to the electrode 46U of the upper actuator assembly 41U. U , 401n U , and their corresponding metal cores 47 and electrodes 46U function to deliver electrical drive signals generated by the controller 22 to the upper actuator assembly 41U of the vibratable transducer 41. In the embodiment of Figures 3a and 3b, the conductive plate 401p L , 401p U , 401n L , 401n U are all provided on a common surface of the aerosolization module 40, i.e., on the bottom surface of the aerosolization module. In the illustrated embodiment, plate 401p L , 401p U , 401n L , 401n U is made of metal.

[0053] 4, a recessed annular seat 24 is defined in one end of the cylindrical portion 20a of the elongated housing 20. The conductive contacts 201 are conductive spring-loaded pin connectors 201p that protrude from the base 25 of the seat 24. L , 201p U , 201n L , 201n U The pin connector 201p has the following form: L and 201n Lis associated with the electrical drive signal of the lower actuator assembly 41L. U and 201n U is associated with the electrical drive signal of upper actuator assembly 41U. In use, aerosolization module 40 is placed in seat 24 such that the bottom surface of the aerosolization module rests on seat base 25. When aerosolization module 40 is positioned in seat 24, pin connector 201p L , 201n L Plate 401p L , 401n L pressed against the corresponding surface of the pin connector 201p U , 201n U Plate 401p U , 401n U 20a, 20b. One end of the mouthpiece portion 20b of the housing 20 is formed with an annular step 26 that corresponds to the annular seat 24. The mouthpiece portion 20b is mated with the cylindrical portion 20a such that the annular step 26 sits in the seat 24 and presses down on the top surface of the aerosolization module 40. Mechanical means (not shown) are provided to secure the cylindrical portion 20a and the mouthpiece portion 20b together. As an example (not shown), the corresponding surfaces of the cylindrical portion 20a and the mouthpiece portion 20b may be correspondingly threaded to define a threaded connection, or alternatively may be contoured to define a bayonet fit between the two portions 20a, 20b. In a further alternative (not shown), the corresponding surfaces of the cylindrical portion 20a and the mouthpiece portion 20b may each include magnets of opposite polarity such that the portions 20a, 20b are magnetically attracted to each other.

[0054] When mouthpiece portion 20b is secured to cylindrical portion 20a, the bottom surface of aerosolization module 40 is pressed firmly against base 25 of seat 24, connecting pin connector 201p L , 201p U , 201n L , 201n Uinto a recess (not shown) provided in the base 25. L , 201p U , 201n L , 201n U The spring-loaded nature of the aerosolization module 40 is L , 401p U , 401n L , 401n U In one alternative (not shown), the aerosolization module 40 and seat 24 are provided with angling features to provide a predetermined alignment between the aerosolization module 40 and seat 24. Such angling features may be used to urge the connector against the surface of the connector 201p. L , 201p U , 201n L , 201n U and its corresponding plate 401p L , 401p U , 401n L , 401n U An example of a suitable angling feature includes mating lugs and recesses on the aerosolization module 40 and on the seat 24.

[0055] In use, the controller 22 accesses the memory module 22a and connects it, along with internal wiring or the like, to the conductive contacts 201, i.e., pin connectors 201p, of the housing 20. L , 201p U , 201n L , 201n U The pin connector 201p generates an electrical drive signal that is transmitted to the L , 201p U , 201n L , 201n U corresponds to the conductive plate 401p of the aerosolization module 40. L , 401p U , 401n L , 401n U2. As the elongated housing 20 is in contact with the upper actuator assembly 41U and the lower actuator assembly 41L, an electrical drive signal is transmitted to the upper actuator assembly 41U and the lower actuator assembly 41L. In this manner, the elongated housing 20 is electrically coupled to the aerosolization module 40, and an electrical drive signal is provided to the upper actuator assembly 41U and the lower actuator assembly 41L to induce vibration thereof. The vibration output from the upper actuator assembly 41U and the lower actuator assembly 41L induces vibration of the membrane 42. A liquid aerosol-forming substrate is drawn from the reservoir 31 by the liquid supply 23 to the underside of the membrane 42. The vibrational action of the membrane 42 results in the substrate being expelled through the nozzle 44 as a pattern of aerosol droplets.

[0056] Figures 5a and 5b show perspective views of a second embodiment of the aerosolization module 40. Figure 6 illustrates the aerosolization module 40 of Figures 5a, 5b positioned within a cradle 50. The cradle 50 can slide in and out of the elongated housing 20 to provide a removable electrical connection between the housing 20 and the aerosolization module 40. Figure 7 provides a cross-sectional view through section BB of Figure 6 when the cradle 50 is fully inserted within the housing 20.

[0057] The conductive contacts 401 of the aerosolization module 40 of FIG. 5a and FIG. 5b are conductive plates 401p L , 401p U , 401n L , 401n U However, in contrast to the aerosolization module 40 of Figures 3a and 3b, the module of Figures 5a and 5b includes a conductive plate 401p associated with the lower actuator assembly 41L. L , 401n L and a conductive plate 401p associated with the upper actuator assembly 41U. U , 401n L are formed on opposing surfaces of the vibrating transducer 41. L , 401n Lis disposed on the bottom surface of the lower actuator assembly 41L, while the conductive plate 401p U , 401n U is disposed on the top surface of the upper actuator assembly 41U. L , 401n L is connected to electrode 46L of lower actuator assembly 41L. Similarly, plate 401p U and 401n U is connected to electrode 46U of upper actuator assembly 41U. L , 401n L , electrode 46L functions to deliver an electrical drive signal generated by controller 22 to lower actuator assembly 41L of vibratable transducer 41. Similarly, plate 401p U , 401n U , electrode 46U functions to deliver an electrical drive signal generated by controller 22 to upper actuator assembly 41L of vibratable transducer 41. In the illustrated embodiment, plate 401p L , 401p U , 401n L , 401n U is made of metal.

[0058] As shown in Fig. 6, an opening 27 is formed in the sidewall of the cylindrical portion 20a of the housing 20. The opening 27 defines an access opening for a cradle 50. The aerosolization module 40 is positioned within the cradle 50. In one alternative (not shown), the aerosolization module 40 and the cradle 50 are provided with angling features to provide a predetermined alignment between the aerosolization module 40 and the cradle. Examples of suitable angling features include mating lugs and recesses on the aerosolization module 40 and the cradle 50.

[0059] The cradle 50 is slidably insertable into the housing 20 as shown in Figures 6 and 7. The cradle 50 is provided with lugs 51 (see Figure 7). When the cradle 50 is slid out of the housing 20, the lugs 51 react against the inner surface of the side wall of the housing 20, thereby preventing decoupling of the cradle 50 from the housing 20. The conductive contacts 201 of the housing 20 are mated with spring-loaded connector pairs 201p. L , 201n L , and 201p. u , 201n U In the view of FIG. 7, only one connector of each pair is visible. L , 201n L , 201p u , 201n U Each of the connectors 201p has an arm 202 extending from its base, and a spring 203 provided at the base is used to bias the connector toward the upper and lower surfaces of the aerosolization module 40. L , 201n L , and 201p. u , 201n U Each pair is connected to the controller 22 by electrical wiring or the like. L , 201n L is associated with providing an electrical drive signal generated by the controller 22 to the lower actuator assembly 41L. u , 201n U is associated with providing an electrical drive signal to the upper actuator assembly 41U. When the cradle 50 holding the aerosolization module 40 is slid inside the housing 20, the connector 201p L , 201n L The lower pair of conductive plates 401p of the lower actuator assembly 41L L , 401n L against the connector 201p by the spring 203. u , 201n U The upper pair of conductive plates 401p of the upper actuator assembly 41UU , 401n U The same is true for

[0060] In use, the controller 22 accesses the memory module 22a and connects it along internal wiring or the like to the conductive contacts 201 of the housing 20, i.e., the spring-loaded connectors 201p. L , 201n L , and 201p. u , 201n U The connector 201p generates an electrical drive signal that is transmitted to the pair of connectors 201p. U , 201n U The upper pair of plates is plate 401p. U , 401n U Connector 201p L , 201n L The lower pair is plate 401p. L , 401n L . In this manner, the elongated housing 20 is electrically coupled to the aerosolization module 40, and electrical drive signals are provided to the upper actuator assembly 41U and the lower actuator assembly 41L to induce vibration thereof. The vibration output from the upper actuator assembly 41U and the lower actuator assembly 41L induces vibration of the membrane 42. A liquid aerosol-forming substrate is drawn from the reservoir 31 by the liquid supply 23 to the underside of the membrane 42. The vibration action of the membrane 42 results in the substrate being expelled through the nozzle 44 as a pattern of aerosol droplets.

[0061] FIG. 8 shows a third embodiment of an aerosolization module 40, in which FIG. 8 shows a plan view of the membrane 42. The aerosolization module 40 of FIG. 8 has a vibratable transducer 41 in the form of a single actuator assembly positioned against one surface of the membrane 42. The membrane 42 has a first membrane portion 42a and a second membrane portion 42b, each of which is formed of metal. The first membrane portion 42a and the second membrane portion 42b are electrically insulated from each other by an insulating strip 48. The region 401p of the membrane portion 42a serves as an electrical contact region. Similarly, the region 401n of the membrane portion 42b also serves as an electrical contact region. The electrode 46 is connected to the regions 401p, 401n. In use, the conductive contacts 201 of the elongated housing 20 contact the regions 401p, 401n to provide an electrical drive signal from the controller 22 to the vibratable transducer 41 of the aerosolization module 40. Insulating strip 43 prevents short circuits between regions 401p and 401n.

[0062] Figure 9 is a schematic diagram of a second embodiment of an aerosol generation system 10. Features in common with the exemplary system of Figure 1 are referred to using similar reference numerals. The aerosol generation system 10 of Figure 9 differs from the system of Figure 1 in that the controller 22 forms part of the aerosolization module 40. As can be seen in Figure 9, the controller 22 is coupled to a peripheral side of the vibratable transducer 41, with the conductive contacts 401 of the aerosolization module coupled to or provided on a surface of the controller. When the aerosolization module 40 is received in the elongated housing 20, the conductive contacts 201 of the housing 20 are in contact with and in electrical communication with the conductive contacts 401.

[0063] For the purposes of this specification and the appended claims, unless otherwise indicated, all numbers expressing amounts, quantities, percentages, and the like, should be understood in all instances as modified by the term "about." Also, all ranges include the maximum and minimum points disclosed, and include any intermediate ranges therein, which may or may not be specifically recited herein. Thus, in this context, the number "A" is understood as "A" ± 10%. Within this context, the number "A" may be considered to include a numerical value that is within the general standard error for the measurement of the property that the number "A" modifies. The number "A" may, in some cases as used in the appended claims, deviate by the percentages recited above, provided that the amount by which "A" deviates does not materially affect the basic and novel property(ies) of the claimed invention. Also, all ranges include the maximum and minimum points disclosed, and include any intermediate ranges therein, which may or may not be specifically recited herein.

Claims

1. An aerosol generating device, comprising: An elongated housing; an aerosolization module removably insertable into a housing of an aerosol generating device, a vibratable transducer for aerosolizing a liquid aerosol-forming substrate; one or more conductive contacts in electrical communication with the vibratable transducer; the one or more conductive contacts are configured for removable electrical connection with corresponding conductive contacts of the housing; the aerosolization module further comprising a membrane, the membrane comprising an aerosol generation zone, the vibratable transducer operatively connected to the membrane for vibrating the membrane in use, the membrane being formed from a conductive material, and a portion of the membrane forming at least one of the one or more conductive contacts of the aerosolization module; the elongated housing is configured to contain a power source and removably receive the aerosolization module so as to establish a releasable electrical connection between the corresponding conductive contacts of the housing and the aerosolization module, thereby electrically coupling the elongated housing to the vibratable transducer; An aerosol generating device, wherein a side wall of the elongated housing has an opening defining an access opening to a cavity extending within the housing, wherein the one or more conductive contacts of the housing are positioned within the cavity, and wherein the corresponding conductive contacts of the housing and the aerosolization module are configured such that insertion of the aerosolization module into the cavity results in an electrical connection between the corresponding contacts of the housing and the aerosolization module.

2. The aerosol generating device of claim 1 , wherein at least one of the one or more conductive contacts of the aerosolization module forms part of the vibratable transducer.

3. 3. An aerosol generating device according to claim 1 or 2, wherein the aerosol-generation zone is provided with a plurality of nozzles for the passage of a liquid aerosol-forming substrate therethrough.

4. An aerosol generating device as described in any one of claims 1 to 3, wherein the one or more conductive contacts of the aerosolization module comprise a first conductive contact and a second conductive contact, a first portion of the membrane forming the first conductive contact and a second portion of the membrane forming the second conductive contact.

5. 5. An aerosol generating device according to claim 1, wherein the vibratable transducer comprises at least one actuator.

6. An aerosol generating device as described in any one of claims 1 to 5, wherein the vibrable transducer comprises an annular actuator assembly coupled to a surface of the membrane and surrounding the aerosol generation zone, the annular actuator assembly comprising one or more actuators.

7. 7. The aerosol generating device of claim 6, wherein the annular actuator assembly comprises a single annular actuator.

8. 7. The aerosol generation device of claim 6, wherein the annular actuator assembly comprises two or more actuators circumferentially disposed relative to one another to define an annulus surrounding the aerosol-generation zone.

9. 6. The aerosol generation device of claim 1, wherein the vibrable transducer comprises a pair of annular actuator assemblies provided as a first annular actuator assembly and a second annular actuator assembly, each of the first annular actuator assembly and the second annular actuator assembly comprising one or more actuators, the first annular actuator assembly and the second annular actuator assembly being arranged to couple to opposing surfaces of the membrane, whereby an annular portion of the membrane is constrained between the first annular actuator assembly and the second annular actuator assembly, the annular portion surrounding the aerosol generation zone, and the one or more conductive contacts of the aerosolization module comprising one or more first conductive contacts in electrical communication with the first annular actuator assembly and one or more second conductive contacts in electrical communication with the second annular actuator assembly.

10. 10. The aerosol generating device of claim 9, wherein either or both of the first annular actuator assembly and the second annular actuator assembly comprise a single annular actuator.

11. An aerosol generating device as described in any one of claims 1 to 10, further comprising a cradle configured to receive the aerosolization module, the cradle being removably insertable into the cavity through the access opening.

12. 12. The aerosol generating device of claim 11, wherein the cradle and the aerosolization module are keyed to one another such that the aerosolization module is receivable within the cradle in a predetermined orientation.

13. 13. An aerosol generating device as described in claim 11 or 12, wherein either or both of the cradle and the housing are configured to prevent decoupling of the cradle from the housing.

14. An aerosol generating device as described in any one of claims 11 to 13, wherein the cradle is contoured to define a substantially flush fit with the side wall of the elongated housing after insertion of the cradle into the cavity.

15. A kit of parts, which when assembled form an aerosol generating device, said parts comprising: An elongated housing; a first aerosolization module; and a second aerosolization module, each of the first aerosolization module and the second aerosolization module, a vibratable transducer for aerosolizing a liquid aerosol-forming substrate; one or more conductive contacts in electrical communication with the vibratable transducer; the one or more conductive contacts are configured for removable electrical connection with corresponding conductive contacts of the housing; the aerosolization module further comprises a membrane, the membrane comprising an aerosolization generation zone, the vibratable transducer being operatively connected to the membrane for vibrating the membrane in use, the membrane being formed of a conductive material, and a portion of the membrane forming at least one of the one or more conductive contacts of the aerosolization module; an elongated housing containing a power source and configured to removably receive one of the first aerosolization module and the second aerosolization module to establish a releasable electrical connection between the housing and the corresponding conductive contacts of the respective aerosolization modules, whereby the elongated housing is electrically coupled to the vibratable transducer; a sidewall of the elongated housing includes an opening defining an access opening to a cavity extending within the housing, the one or more conductive contacts of the housing are located within the cavity, and the corresponding conductive contacts of the housing and the aerosolization module are configured such that insertion of the aerosolization module into the cavity results in an electrical connection between the corresponding contacts of the housing and the aerosolization module; The kit, wherein the first aerosolization module and the second aerosolization module are mutually interchangeable within the elongated housing so as to be removably received within the elongated housing, the first aerosolization module configured to generate a first aerosol emission pattern, and the second aerosolization module configured to generate a second aerosol emission pattern, the first aerosol emission pattern and the second aerosol emission pattern being different from each other.

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