Aerosol generating device and interaction system

Abstract

The utility model relates to aerosol generating equipment and an interaction system. The aerosol generating equipment comprises a metal shell, a radio frequency circuit and a signal transmission module, the radio frequency circuit and the signal transmission module are arranged in the metal shell; and the radio frequency circuit is electrically connected with the signal transmission module and is used for outputting a radio frequency signal to the metal shell through the signal transmission module, so that the metal shell serves as an antenna radiator to emit the radio frequency signal. According to the aerosol generating equipment, the radio frequency circuit and the signal transmission module are arranged in the metal shell, and the radio frequency signal output by the radio frequency circuit is output to the metal shell through the signal transmission module, so that the metal shell is directly used as an antenna radiator, a wireless communication function is realized, and the signal transmission module can transmit the radio frequency signal to the metal shell. And the all-metal shell meets the industrial design angle.

Description

Technical Field

[0001] This application relates to the field of aerosol technology, and in particular to an aerosol generating device and interactive system. Background Technology

[0002] In the application scenarios of electronic cigarette aerosol devices, two types of aerosol products, namely atomized type and heated non-combustible type, can be heated to generate corresponding aerosols for users to inhale.

[0003] To enhance the value of aerosol generating equipment, existing technologies incorporate wireless communication technology, enabling it to interact with the corresponding control terminal via wireless communication. Antennas are an essential component for achieving wireless communication.

[0004] From an industrial design perspective, it is desirable for aerosol generating devices to utilize as much metal as possible in their casing to enhance their texture and appearance. However, an all-metal casing is highly unfavorable for antenna design, making it difficult to achieve wireless communication using current technology. Utility Model Content

[0005] This application provides an aerosol generating device and interactive system, which sets up a radio frequency circuit and a signal transmission module inside a metal housing, and outputs the radio frequency signal from the radio frequency circuit to the metal housing through the signal transmission module, thereby directly using the metal housing as an antenna radiator, so as to at least partially solve the above-mentioned technical problems.

[0006] To achieve the above objectives, according to a first aspect of this application, an aerosol generating device is provided, comprising a metal housing, a radio frequency circuit, and a signal transmission module;

[0007] The radio frequency circuitry and signal transmission module are housed inside the metal casing.

[0008] The radio frequency circuit is electrically connected to the signal transmission module and is used to output radio frequency signals to the metal casing through the signal transmission module, so that the metal casing can act as an antenna radiator to transmit radio frequency signals.

[0009] Optionally, the signal transmission module includes electrical connectors;

[0010] The first end of the electrical connector is electrically connected to the radio frequency circuit, and the second end of the electrical connector is electrically connected to the metal housing.

[0011] Optional, electrical connectors include power feed springs;

[0012] The first end of the feeding spring is electrically connected to the radio frequency circuit and fixed relative to the metal housing, while the second end of the feeding spring abuts against the inner wall of the metal housing.

[0013] Optionally, the power feeding spring includes a middle part, a first bent part, and a second bent part;

[0014] The first end of the middle part is fixedly connected to one side end of the first bent part, the second end of the middle part is fixedly connected to one side end of the second bent part, the top end of the first bent part is fixed relative to the metal shell, the top end of the second bent part abuts against the inner wall of the metal shell, and the first bent part is electrically connected to the radio frequency circuit.

[0015] Optionally, the signal transmission module may also include a first metal wire;

[0016] The first end of the first metal wire is electrically connected to the radio frequency circuit, and the second end of the first metal wire is electrically connected to the first end of the feeding spring.

[0017] Optionally, the signal transmission module includes a signal coupler;

[0018] The signal coupler is electrically connected to the radio frequency circuit and is used to couple the radio frequency signal output by the radio frequency circuit to the metal housing.

[0019] Optionally, the signal coupling element includes a coupling feed wire;

[0020] One end of the coupling feed wire is electrically connected to the radio frequency circuit and fixed relative to the metal housing.

[0021] Optionally, the coupling feed conductor includes a first bent section and a first straight section;

[0022] The first end of the first bent section is electrically connected to the radio frequency circuit and fixed relative to the metal housing; the second end of the first bent section is fixedly connected to the first end of the first straight section.

[0023] The first bend is used to move the first straight section away from the RF circuit and closer to the inner wall of the metal casing.

[0024] Optionally, the coupling feed conductor may further include a second bent section and a second straight section;

[0025] The first end of the second bent segment is fixedly connected to the second end of the first straight segment, and the second end of the second bent segment is fixedly connected to the first end of the second straight segment.

[0026] Optionally, the signal transmission module may also include a second metal wire;

[0027] The first end of the second metal wire is electrically connected to the radio frequency circuit, and the second end of the second metal wire is electrically connected to the coupling feed wire.

[0028] Optionally, the radio frequency circuitry and signal transmission module are located near one end of the metal housing.

[0029] Optionally, the aerosol generating device may also include an impedance matching circuit;

[0030] The radio frequency circuit is electrically connected to the signal transmission module through an impedance matching circuit.

[0031] Optionally, the aerosol generating device may also include a printed circuit board disposed inside a metal housing;

[0032] The printed circuit board is fixed relative to the metal housing, and the radio frequency circuit and signal transmission module are mounted on the printed circuit board.

[0033] According to a second aspect of this application, an interactive system is provided, including a control terminal and the aerosol generating device in any of the above embodiments;

[0034] The control terminal is used to interact with the aerosol generating device via radio frequency signals to achieve data transmission.

[0035] The aerosol generating device in this application has a radio frequency circuit and a signal transmission module installed inside a metal casing. The radio frequency signal output from the radio frequency circuit is output to the metal casing through the signal transmission module, thereby directly using the metal casing as an antenna radiator. This achieves both wireless communication functionality and meets the requirements of an all-metal casing from an industrial design perspective.

[0036] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0039] Figure 1 This is a schematic diagram of the structure of the metal shell in the aerosol generating device provided in the exemplary embodiments disclosed in this application;

[0040] Figure 2 This is a structural cross-sectional view of the aerosol generating device provided in an exemplary embodiment of this application;

[0041] Figure 3 yes Figure 2 A magnified view of a portion of the image;

[0042] Figure 4 This is a partially enlarged view of a feed spring with another shape and position provided in an exemplary embodiment of this application;

[0043] Figure 5 This is a cross-sectional view of a feed spring of another shape and position provided in an exemplary embodiment of this application;

[0044] Figure 6 yes Figure 5 A magnified view of a portion of the image;

[0045] Figure 7 This is a cross-sectional view of the structure of the signal transmission module provided in the exemplary embodiment of this application, which is a coupled feed wire;

[0046] Figure 8 yes Figure 7 A magnified view of a portion of the image;

[0047] Figure 9 This is a structural cross-sectional view of another shape of the coupling feeder wire provided in the exemplary embodiments disclosed in this application;

[0048] Figure 10 This is a schematic diagram of simulation results provided in an exemplary embodiment disclosed in this application. Detailed Implementation

[0049] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0050] According to the first aspect of this application, Figures 1 to 3 As shown, an aerosol generating device is provided, including a metal housing 1 and a radio frequency circuit 2, a power supply spring 31, a first metal wire 32 and a printed circuit board 4 disposed inside the metal housing 1.

[0051] Among them, Figures 1 to 3 In this embodiment, the metal housing 1 is shaped like an elliptical cylinder. However, in other embodiments, the metal housing 1 can also be shaped like a square cylinder, a rectangular cylinder, or a cylinder. Furthermore, the metal housing 1 does not have to be a strictly uniform cylindrical shape. It can be designed with different shapes in different locations according to the product ID, functions, and other design requirements. For example, based on the human hand grip, certain local areas in the middle of the metal housing 1 can be recessed to facilitate the human hand gripping the device. Or, an arc design can be made at the top or bottom of the metal housing 1 to achieve the desired appearance. Accordingly, it can be seen that this application, based on the metal housing 1 as an antenna radiator, can be implemented very conveniently and has great flexibility.

[0052] The first end of the first metal wire 32 is electrically connected to the radio frequency circuit 2, the second end of the first metal wire 32 is electrically connected to the first end of the feeding spring 31, and the second end of the feeding spring 31 abuts against the inner wall of the metal housing 1.

[0053] The radio frequency circuit 2, the feed spring 31, and the first metal wire 32 are respectively fixed on the printed circuit board 4. The printed circuit board 4 is fixedly connected to the metal housing 1, so that the first end of the radio frequency circuit 2, the feed spring 31, and the first metal wire 32 are also fixed relative to the metal housing 1. When the first end of the feed spring 31 is fixed relative to the metal housing 1, its second end can elastically abut against the inner wall of the metal housing 1. Of course, in other embodiments, when the feed spring 31 is not fixed to the printed circuit board 4, the purpose of fixing the first end of the feed spring 31 relative to the metal housing 1 can also be achieved by other means, such as using a bracket structure fixedly connected to the metal housing 1.

[0054] The power supply spring 31 can be fixed to the printed circuit board 4 using surface-mount technology (SMT). Alternatively, it can be assembled using aerosol to create the structural features of the various components inside the device, fixing the power supply spring 31 inside the whole machine and achieving electrical connection with the printed circuit board 4 and the metal housing 1.

[0055] In addition to the aforementioned RF circuit 2, power supply spring 31, and first metal line 32, various other devices can be installed on the printed circuit board 4, such as capacitors, inductors, resistors, connectors, foam, MCU (microcontroller), filters, sensors, etc., as well as the metal traces required between the devices.

[0056] In this embodiment, the power feeding spring 31 utilizes its elasticity to achieve a reliable electrical connection between the first metal wire 32 and the metal housing 1 in an interference fit.

[0057] The first metal line 32 between the feed spring 31 and the radio frequency circuit 2 includes, but is not limited to, radio frequency transmission lines such as microstrip lines, coplanar waveguides, striplines, slot lines, and coaxial lines.

[0058] Among them, the radio frequency circuit 2 consists of radio frequency chips / modules, related supporting devices and metal traces.

[0059] In this embodiment, the radio frequency signal generated by the radio frequency circuit 2 can be transmitted to the metal housing 1 through the first metal wire 32 and the feed spring 31, and excite the metal housing 1 to radiate electromagnetic wave signals to the outside as an antenna radiator.

[0060] It should be understood that the RF circuit 2 typically provides corresponding pins for electrical connection. However, due to the structural limitations of the feed spring 31, it is difficult for the feed spring 31 to directly connect to the RF circuit 2. Therefore, an additional first metal line 32 is required to assist in the connection. Of course, in other embodiments, the feed spring 31 can also adopt a specific structure to enable it to be directly electrically connected to the RF circuit 2.

[0061] Among them, the power feeding spring 31 needs to be made of metal. There are no restrictions on the specific type of metal material, including but not limited to stainless steel or copper. In addition, metal materials can also be selected as the material for the power feeding spring after various surface treatments.

[0062] It should be noted that in this embodiment, the feed spring 31 and the first metal wire 32 are used to transmit radio frequency signals. The core of this method is that they are electrically connected to the radio frequency circuit 2 and the metal housing 1 respectively, so that a wired signal path is formed between the radio frequency circuit 2 and the metal housing 1, thereby enabling signal transmission.

[0063] As long as the radio frequency signal output by the radio frequency circuit 2 can be transmitted to the metal housing 1, in addition to the aforementioned feed spring 31 and first metal wire 32, other specific structures can be used as electrical connectors between the radio frequency circuit 2 and the metal housing 1, such as pogo pins, probes, etc. The specific connection methods can also include welding, screwing, snap-fit, mortise and tenon, etc., as long as the electrical connection between the radio frequency circuit 2 and the metal housing 1 can be achieved.

[0064] As mentioned above, a wired signal path can be formed between the radio frequency circuit 2 and the metal housing 1 to transmit signals. In addition, in other embodiments, a wireless signal path can be formed between the radio frequency circuit 2 and the metal housing 1 to transmit signals. Thus, other specific structures besides the electrical connectors mentioned above can be used as signal transmission modules between the radio frequency circuit 2 and the metal housing 1.

[0065] The shape, placement and orientation of the printed circuit board 4 need to be determined based on the structural characteristics and assembly relationship of each component inside the aerosol generating equipment. There are no specific restrictions. The printed circuit board 4 can also be replaced by other types of materials, substrates and substrate processes, including ceramic substrates, carrier boards, LTCC, HTCC, etc., or it can be implemented using flexible printed circuit boards (FPC).

[0066] There are no specific restrictions on the shape and placement of the feed spring 31. Figure 4 It shows a different Figures 1 to 3 The shape and placement of the feed spring 31. Figure 4In this process, the power feeding spring 31 is placed at a position on the bottom of the aerosol generating device, while the shape and orientation of the printed circuit board 4 are adjusted to excite the metal housing 1. By placing the power feeding spring 31 as... Figure 4 As shown, when placed at the bottom of the aerosol generating device, the metal casing 1 can achieve better antenna radiation performance.

[0067] It should be noted that the "bottom" mentioned above refers to one end of the aerosol generating device. Generally, one end of the aerosol generating device is equipped with functional components such as a USB port and an oil outlet to facilitate device charging and cleaning. The other end is where the aerosol-generating product, such as a cigarette or e-cigarette cartridge, is inserted, allowing the user to inhale it. As can be seen from the above description, the solution of this embodiment can be implemented at either end of the aerosol generating device, that is, at the bottom or top of the aerosol generating device, the corresponding purpose can be achieved.

[0068] The aerosol generating device in this application has a radio frequency circuit and a signal transmission module installed inside a metal casing. The radio frequency signal output from the radio frequency circuit is output to the metal casing through the signal transmission module, thereby directly using the metal casing as an antenna radiator. This achieves both wireless communication functionality and meets the requirements of an all-metal casing from an industrial design perspective.

[0069] like Figure 2 and Figure 3 As shown, the power feed spring 31 has a shape including an I-shaped part that is fixedly connected to the surface of the printed circuit board 4 and a bent part that is close to the inner wall of the metal housing 1. The I-shaped part is electrically connected to the radio frequency circuit 2, and the bent part abuts against the inner wall of the metal housing 1.

[0070] like Figure 4 As shown, the power feed spring 31 has a shape including an "L"-shaped part that is fixedly connected to the surface of the printed circuit board 4 and a "U"-shaped part that is close to the inner wall of the metal housing 1. The "L"-shaped part is electrically connected to the radio frequency circuit 2, and the "U"-shaped part abuts against the inner wall of the metal housing 1.

[0071] like Figure 5 and Figure 6 As shown, optionally, the power feeding spring 31 can also adopt other shapes. Specifically, the power feeding spring 31 includes a middle part 311, a first bent part 312, and a second bent part 313.

[0072] The first end of the middle part 311 is fixedly connected to one side end of the first bent part 312, and the second end of the middle part 311 is fixedly connected to one side end of the second bent part 313. The top end (such as the bend) of the first bent part 312 is fixed on the printed circuit board 4 to be fixed relative to the metal housing 1. The top end (such as the bend) of the second bent part 313 abuts against the inner wall of the metal housing 1. The first bent part 312 is electrically connected to the radio frequency circuit 2 through the first metal wire 32.

[0073] The middle part 311 and the first bending part 312 can form a first elastic component, and the middle part 311 and the second bending part 313 can form a second elastic component. The elasticity can be improved by the two elastic components, thereby enabling a more reliable electrical connection between the metal housing 1 and the radio frequency circuit 2.

[0074] Optionally, the signal transmission module includes a signal coupler;

[0075] The signal coupler is electrically connected to the radio frequency circuit and is used to couple the radio frequency signal output by the radio frequency circuit to the metal housing.

[0076] Among them, reference Figures 1 to 6 As mentioned in the above embodiments, a signal transmission module can be constructed using electrical connectors such as the power supply spring 31 and the corresponding first metal wire 32, thereby forming a wired signal transmission path between the radio frequency circuit 2 and the metal housing 1. In this embodiment, a signal coupler can also be used as the signal transmission module, thereby enabling a wireless signal transmission path to be formed between the radio frequency circuit 2 and the metal housing 1 and transmitting the corresponding radio frequency signal in a coupled manner.

[0077] like Figure 7 and Figure 8 As shown, optionally, the signal coupling element includes a coupling feed wire 51 and a second metal wire 52.

[0078] The first end of the second metal line 52 is electrically connected to the radio frequency circuit 2, and the second end of the second metal line 52 is electrically connected to the first end of the coupling feed wire 51.

[0079] Similarly, the RF circuit 2, the coupling feed wire 51, and the second metal wire are fixed on the printed circuit board 4, and the printed circuit board 4 is fixedly connected to the metal housing 1, so that the first end of the RF circuit 2, the coupling feed wire 51, and the second metal wire 52 are also fixed relative to the metal housing 1.

[0080] The coupling feed wire 51 can also be fixed on the printed circuit board 4 by surface-mount technology (SMT), manual soldering or machine soldering.

[0081] Among them, the second metal line 52 that couples the first metal line 32 and the feed wire 51 and the radio frequency circuit 2 includes, but is not limited to, radio frequency transmission lines such as microstrip lines, coplanar waveguides, striplines, slot lines, and coaxial lines.

[0082] In this embodiment, the radio frequency signal generated by the radio frequency circuit 2 can be transmitted to the metal housing 1 through the second metal wire 52 and the coupling feed wire 51, thereby exciting the metal housing 1 to radiate electromagnetic wave signals as an antenna radiator. By adjusting and maintaining the distance between the coupling feed wire 51 and the metal housing 1, the coupling strength between the coupling feed wire 51 and the metal housing 1 can be adjusted, thereby adjusting and optimizing the radiation performance of the metal housing 1 as an antenna radiator. In addition, the radiation performance can also be optimized by adjusting the diameter, length, etc. of the coupling feed wire 51.

[0083] On the other hand, only when the first end of the coupling feed wire 51 is fixed relative to the metal housing 1 can the distance between it and the metal housing 1 remain constant, thereby achieving reliable coupling with the metal housing 1. Of course, in other embodiments, when the coupling feed wire 51 is not fixed on the printed circuit board 4, the purpose of fixing the first end of the coupling feed wire 51 relative to the metal housing 1 can also be achieved in other ways. For example, a corresponding support structure can be set inside the metal housing 1 to stably fix the coupling feed wire 51 inside the metal housing 1.

[0084] like Figure 8 As shown, optionally, the coupling feed conductor 51 includes a first bent section 511 and a first straight section 512.

[0085] The first end of the first bent segment 511 is electrically connected to the radio frequency circuit 2 and fixed on the printed circuit board 4 to be fixed relative to the metal housing 1. The second end of the first bent segment 511 is fixedly connected to the first end of the first straight segment 512.

[0086] The first bent section 511 is used to move the first straight section 512 away from the radio frequency circuit 2 and close to the inner wall of the metal housing 1.

[0087] The first bending segment 511 can raise the first straight segment 512 on the plane where the printed circuit board 4 is located. Since the printed circuit board 4 faces the inner wall of the metal housing 1, the purpose of bringing the first straight segment 512 closer to the inner wall of the metal housing 1 is achieved.

[0088] As mentioned in the above embodiments, the coupling strength between the coupling feed conductor 51 and the metal housing 1 can be adjusted by changing the distance between them. Therefore, in this embodiment, the first straight section 512 is brought closer to the inner wall of the metal housing 1 by the first bent section 511, thereby reducing the distance between the coupling feed conductor 51 and the metal housing 1. This improves the coupling strength between them and enhances the reliability of wireless communication.

[0089] like Figure 9As shown, optionally, the coupling feed conductor 51 also includes a second bent section 513 and a second straight section 514.

[0090] The first end of the second bent segment 513 is fixedly connected to the second end of the first straight segment 512, and the second end of the second bent segment 513 is fixedly connected to the first end of the second straight segment 514.

[0091] In addition, the coupling feed conductor 51 may also include a third bent section 515 and a third straight section 516, with the first end of the third bent section 515 electrically connected to the second end of the second straight section 514, and the second end of the third bent section 515 electrically connected to the first end of the third straight section 516.

[0092] By using the second bending segment 513, the second straight segment 514, the third bending segment 515, and the third straight segment 516, the length of the coupling feed conductor 51 can be increased based on the first bending segment 511 and the first straight segment 512, thereby increasing the coupling strength between the coupling feed conductor 51 and the metal shell 1.

[0093] It should be understood that the RF circuit 2 typically provides corresponding pins for electrical connection. However, due to the structural limitations of the coupling feed wire 51, it is difficult for the coupling feed wire 51 to be directly electrically connected to the RF circuit 2. Therefore, an additional second metal wire 52 is required to assist in the connection. Of course, in other embodiments, the coupling feed wire 51 can also adopt a specific structure to enable it to be directly electrically connected to the RF circuit 2.

[0094] Optional, refer to Figures 1 to 9 Both the feed spring 31 and the coupling feed wire 51 can be pre-formed components, or they can be customized according to the internal space characteristics of the metal shell 1, and are not limited to these. Figures 1 to 9 The shape shown.

[0095] Optionally, the aerosol generating device also includes an impedance matching circuit, through which the radio frequency circuit is electrically connected to the signal transmission module.

[0096] Among them, the impedance matching circuit enables the metal shell, which serves as the antenna radiator, to achieve better impedance matching performance, thereby reducing the return loss of the antenna radiator and improving its performance.

[0097] The impedance matching circuit may include devices and related chips such as capacitors, inductors, resistors, ferrite beads, antenna switches, and antenna tuners. This embodiment does not impose specific restrictions on the topology of the impedance matching circuit. It can be selected based on the characteristics of the return loss before impedance matching of the antenna radiator. Typical topologies include L-type, π-type, two-stage L-type cascade, two-stage π-type cascade, and L-type and π-type cascade.

[0098] As a supplement, when the aerosol generating device uses the antenna scheme of this application, the simulated performance curve of the antenna radiator after impedance matching is shown in the figure below. Figure 10 As shown, through adjustments and optimizations, this antenna radiator can operate well in the Bluetooth frequency band (2.4GHz~2.4835GHz). Figure 10 As can be seen, the return loss of this antenna radiator in the Bluetooth band is below -12.8dB, and the total radiation efficiency is above -13.1dB. Relatively speaking, although the total radiation efficiency of this antenna solution is not very high, it can still meet the communication needs of many user scenarios, especially for aerosol generating devices. In most cases, aerosol generating devices are located within the user's reach, so this antenna solution can well meet the user's wireless communication needs for aerosol generating devices over short distances.

[0099] According to a second aspect of this application, an interactive system is provided, including a control terminal and the aerosol generating device in any of the above embodiments;

[0100] The control terminal is used to interact with the aerosol generating device via radio frequency signals to achieve data transmission.

[0101] The aerosol generating device in the interactive system of this application has a radio frequency circuit and a signal transmission module set inside the metal shell. The radio frequency signal output by the radio frequency circuit is output to the metal shell through the signal transmission module, thereby directly using the metal shell as an antenna radiator. This realizes both wireless communication function and meets the requirements of an all-metal shell from an industrial design perspective.

[0102] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0103] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0104] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0105] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. In the embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant content of other embodiments. Any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An aerosol generating device, characterized in that, Includes a metal casing, radio frequency circuitry, and signal transmission module; The radio frequency circuit and the signal transmission module are disposed inside the metal housing; The radio frequency circuit is electrically connected to the signal transmission module and is used to output radio frequency signals to the metal casing through the signal transmission module, so that the metal casing acts as an antenna radiator to transmit the radio frequency signals.

2. The aerosol generating device according to claim 1, characterized in that, The signal transmission module includes electrical connectors; The first end of the electrical connector is electrically connected to the radio frequency circuit, and the second end of the electrical connector is electrically connected to the metal housing.

3. The aerosol generating device according to claim 2, characterized in that, The electrical connector includes a power supply spring; The first end of the feeding spring is electrically connected to the radio frequency circuit and fixed relative to the metal housing, and the second end of the feeding spring abuts against the inner wall of the metal housing.

4. The aerosol generating device according to claim 3, characterized in that, The power feeding spring includes a middle part, a first bent part, and a second bent part; The first end of the middle portion is fixedly connected to one side end of the first bent portion, the second end of the middle portion is fixedly connected to one side end of the second bent portion, the top end of the first bent portion is fixed relative to the metal housing, the top end of the second bent portion abuts against the inner wall of the metal housing, and the first bent portion is electrically connected to the radio frequency circuit.

5. The aerosol generating device according to claim 3, characterized in that, The signal transmission module also includes a first metal wire; The first end of the first metal wire is electrically connected to the radio frequency circuit, and the second end of the first metal wire is electrically connected to the first end of the feed spring.

6. The aerosol generating device according to claim 1, characterized in that, The signal transmission module includes a signal coupling element; The signal coupler is electrically connected to the radio frequency circuit and is used to couple the radio frequency signal output by the radio frequency circuit to the metal housing.

7. The aerosol generating device according to claim 6, characterized in that, The signal coupling device includes a coupling feed wire; One end of the coupling feed wire is electrically connected to the radio frequency circuit and fixed relative to the metal housing.

8. The aerosol generating device according to claim 7, characterized in that, The coupling feed conductor includes a first bent section and a first straight section; The first end of the first bent section is electrically connected to the radio frequency circuit and fixed relative to the metal housing, and the second end of the first bent section is fixedly connected to the first end of the first straight section; The first bend is used to move the first straight section away from the radio frequency circuit and closer to the inner wall of the metal housing.

9. The aerosol generating device according to claim 8, characterized in that, The coupling feed conductor also includes a second bent section and a second straight section; The first end of the second bent segment is fixedly connected to the second end of the first straight segment, and the second end of the second bent segment is fixedly connected to the first end of the second straight segment.

10. The aerosol generating device according to claim 7, characterized in that, The signal transmission module also includes a second metal wire; The first end of the second metal wire is electrically connected to the radio frequency circuit, and the second end of the second metal wire is electrically connected to the coupling feed wire.

11. The aerosol generating apparatus according to any one of claims 1 to 10, characterized in that, The radio frequency circuit and the signal transmission module are located near one end of the metal housing.

12. The aerosol generating apparatus according to any one of claims 1 to 10, characterized in that, The aerosol generating device also includes an impedance matching circuit. The radio frequency circuit is electrically connected to the signal transmission module through the impedance matching circuit.

13. The aerosol generating apparatus according to any one of claims 1 to 10, characterized in that, The aerosol generating device also includes a printed circuit board disposed inside the metal housing; The printed circuit board is fixed relative to the metal housing, and the radio frequency circuit and the signal transmission module are disposed on the printed circuit board.

14. An interactive system, characterized in that, Includes a control terminal and the aerosol generating device according to any one of claims 1 to 13; The control terminal is used to interact with the aerosol generating device via radio frequency signals to achieve data transmission.

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