Tobacco product direct heating smoking set

Abstract

The utility model discloses a tobacco product direct heating smoking set which comprises a middle frame, an upper cover assembly and a lower cover, a containing cavity is defined by the middle frame, the upper cover assembly and the lower cover, and a support, a heating device, a main control board and a battery are arranged in the containing cavity. The tobacco shred section is directly heated in a surrounding mode through the heating cavity formed by the heating device, so that the electric heating conversion element is small in heat loss and high in heating efficiency, the tobacco shred section is accurately heated, the heating effect can be rapidly achieved without too high heating temperature, the surface of a tobacco product cannot be burnt, and the mouth cannot be scalded during smoking.

Description

Technical Field

[0001] This application relates to the field of smoke-free technology, and in particular to a tobacco product direct heating smoking device. Background Technology

[0002] Currently, there are generally two methods for heating tobacco products in smoking devices. One method involves embedding a metal plate inside the tobacco shreds, which is then heated using electromagnetic induction technology. However, the metal plate is usually small, limiting the heating area of ​​the tobacco shreds and resulting in insufficient heating. Furthermore, this method only works with tobacco products containing the metal plate.

[0003] Another method involves placing the tobacco product inside a heat-conducting shell, with a heating material surrounding the shell. Heat is transferred to the shell via this material, which then heats the tobacco product indirectly. However, this method requires higher temperatures, results in greater heat loss from the heating material, slow heating of the tobacco product, inaccurate temperature control of the heating material, and a hot mouthpiece. Summary of the Invention

[0004] The purpose of this application is to provide a smoking device to solve the technical problems existing in the prior art. The various technical effects of the optional technical solutions provided in this application are detailed below.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] This application provides a tobacco product direct heating device, including a middle frame, an upper cover assembly and a lower cover. The upper cover assembly is fixedly connected to one end of the middle frame, and the lower cover is fixedly connected to the other end of the middle frame. The middle frame, the upper cover assembly and the lower cover together form a receiving cavity.

[0007] The cavity contains a support, a heating device, a main control board, and a battery. The heating device and the main control board are respectively fixed to one end of the support. The battery is fixed in the receiving groove formed by the support. One end of the lead wire of the charging interface is soldered to the main control board and fixed by the support. The other end of the lead wire of the charging interface is connected to the charging interface. The charging interface extends from the other end of the support and protrudes from the lower cover. The conductive pins of the heating device, the tabs of the battery, and the lead wire of the charging interface are all soldered to the main control board so that the heating device, the battery, and the charging interface are all electrically connected to the main control board.

[0008] The heating device includes an electrothermal conversion element, which is used to form a heating cavity for accommodating tobacco products. One end of the heating cavity has an opening, and the other end has a closed structure.

[0009] The upper cover assembly has a through hole exposing the opening, and the main control board controls the power supply of the electrothermal conversion element to be turned on or off, or adjusts the power supply level, according to the temperature of the electrothermal conversion element.

[0010] In some embodiments, the heating device further includes an injection molded part, wherein the heating device is a combination of the electrothermal conversion element and the injection molded part being in-mold molded, the injection molded part being formed in-mold injection, the two ends of the electrothermal conversion element being exposed on the outer surface of the injection molded part for connecting the conductive pins; the inner surface of the injection molded part and the inner surface of the electrothermal conversion element are on the same curved surface to form the heating cavity.

[0011] In some embodiments, the heating device has one or more hollow cavities; the heating device further includes heat insulation cotton, which wraps the outer surface of the injection molded part, and the heat insulation cotton and the hollow cavity form an air insulation chamber.

[0012] In some embodiments, the electrothermal conversion element includes one or more spiral coils, the inner surface of the spiral coil is on the same curved surface as the inner surface of the injection molded part, the injection molded part is combined with the spiral coil by in-mold injection molding, the spiral coil is fixed during the in-mold injection molding process, a distance is maintained between adjacent spiral coils, and the outer surface portion of the spiral coil is exposed in the hollow cavity formed by the injection molded part.

[0013] In some embodiments, the bottom of the closed structure at one end of the heating cavity has at least one step for limiting the tobacco product and forming a ventilation chamber.

[0014] In some embodiments, at least two grooves are provided between the inner surface of the heating cavity and the outer surface of the tobacco product, and the opening, the grooves and the ventilation chamber form an air circulation channel.

[0015] In some embodiments, at least two protrusions are provided at the opening toward the center of the opening, and the tobacco product can be deformed by the protrusions to form the groove when inserted into the heating cavity.

[0016] In some embodiments, the middle frame is provided with a plurality of observation windows, and a plurality of working indicator lights for displaying the working status of the smoking device are welded on the main control board. The positions of the working indicator lights correspond to the positions of the observation windows. A light guide column is sleeved around the working indicator light. The light guide column is fixedly connected to the main control board. The light guide column is used to guide the light of the working indicator light onto the middle frame so as to display the light of the working indicator light in the observation window.

[0017] In some embodiments, the cover assembly includes the cover panel and a sliding cover, the cover panel having the through hole, the through hole and the sliding cover being located on the same end face of the cover panel, the sliding cover being connected to the cover panel by a spring, and the sliding cover sliding on the cover panel to cover or open the through hole.

[0018] Implementing one of the above-mentioned technical solutions of this application has the following advantages or beneficial effects: The tobacco product direct heating device of this application embodiment forms a receiving cavity by enclosing a middle frame, an upper cover assembly, and a lower cover, for placing a support, a heating device, a main control board, and a battery. When the device heats the tobacco product, multiple hollow cavities on the outer surface of the heating device form an air insulation chamber, and the heating chamber formed by the heating device surrounds the tobacco shreds of the tobacco product, directly and precisely heating the tobacco product. This results in less heat loss compared to indirect heating, leading to faster heating of the tobacco shreds and higher heating efficiency. Furthermore, since the sponge segment at one end of the tobacco product abuts against the closed end of the heating chamber to form a ventilation chamber, combined with the opening to form an air circulation channel, air enters the ventilation chamber from the opening of the heating device, then enters from the first end sponge segment, passes through the tobacco shreds, and is then drawn out from the mouthpiece of the second end sponge segment. Therefore, the heat on the surface of the second end sponge segment is carried to the ventilation chamber, effectively reducing the surface temperature of the second end sponge segment and avoiding the problem of scalding the mouthpiece. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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. In the drawings:

[0020] Figure 1 This is a first structural schematic diagram of a tobacco product direct heating smoking device involved in the embodiments of this application;

[0021] Figure 2 This is an exploded view of the tobacco product direct heating device involved in the embodiments of this application;

[0022] Figure 3 This is a schematic diagram of the structure of the upper cover component involved in the embodiments of this application;

[0023] Figure 4 This is a schematic diagram of the structure of the support involved in the embodiments of this application;

[0024] Figure 5 This is a schematic diagram of the heating device involved in the embodiments of this application;

[0025] Figure 6This is an exploded view of the heating device involved in the embodiments of this application after tobacco products are installed;

[0026] Figure 7 This is a schematic diagram of the structure of the injection molded part involved in the embodiments of this application;

[0027] Figure 8 This is a schematic diagram of the heating device involved in the embodiments of this application when it is not wrapped with insulation cotton;

[0028] Figure 9 This is a cross-sectional view of the heating device involved in the embodiments of this application;

[0029] Figure 10 This is a top view of the positioning seat involved in the embodiments of this application;

[0030] Figure 11 This is a schematic diagram of the structure of a spiral coil involved in an embodiment of this application;

[0031] Figure 12 This is yet another structural schematic diagram of the helical coil involved in the embodiments of this application;

[0032] In the diagram: 1. Smoking device; 2. Tobacco product; 3. Power button; 4. Conductive pin; 5. Ventilation chamber; 11. Middle frame; 12. Top cover assembly; 13. Bottom cover; 14. Bracket; 15. Heating device; 16. Main control board; 17. Battery; 18. Charging interface; 19. Temperature sensor; 21. First end sponge section; 22. Tobacco section; 23. Second end sponge section; 111. Observation window; 121. Through hole; 122. Top cover panel; 123. Sliding cover; 151 152. Electrothermal conversion element; 153. Injection molded part; 154. Hollow cavity; 155. Insulation cotton; 156. Neck part; 157. Positioning seat; 158. Heat insulation ring; 159. Structural gap; 160. Heating through hole; 161. Working indicator light; 162. Light guide column; 163. Motor; 1510. Spiral coil; 1511. Opening; 1512. Step; 1513. Protrusion; 1514. Integrated coil; 1515. Spacing; 1521. Diameter. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, various exemplary embodiments described below will be referenced to the accompanying drawings, which form part of the exemplary embodiments and depict various exemplary embodiments that may be adopted to implement this application. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. It should be understood that they are merely examples of processes, methods, and apparatuses consistent with some aspects of this application disclosed as detailed in the appended claims, and other embodiments may be used, or structural and functional modifications may be made to the embodiments listed herein without departing from the scope and spirit of this application.

[0034] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the referred element must have a specific orientation, or be constructed and operated in a specific orientation. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. The term "multiple" means two or more. The terms "connected" and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, communication connections, direct connections, indirect connections through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. The term "and / or" includes any and all combinations of one or more of the related listed items. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] To illustrate the technical solutions described in this application, specific embodiments are provided below, showing only the parts related to the embodiments of this application.

[0036] like Figures 1 to 12 As shown, this application provides a tobacco product direct heating smoking device 1, including a middle frame 11, an upper cover assembly 12, a lower cover 13, a bracket 14, a heating device 15, a battery 17, a main control board 16, and a charging interface 18.

[0037] The upper cover assembly 12 is fixedly connected to one end of the middle frame 11, and the lower cover 13 is fixedly connected to the other end of the middle frame 11. The middle frame 11, the upper cover assembly 12, and the lower cover 13 together form a receiving cavity.

[0038] The cavity contains a support 14, a heating device 15, a main control board 16, and a battery 17.

[0039] The middle frame 11 is a hollow structure with openings at both ends, used to accommodate the bracket 14 and fix the upper cover assembly 12 and the lower cover 13. It has four observation windows 111 and one window that exposes the power button 3.

[0040] The lower cover 13 has three through-hole structures. Two of the through-hole structures are used to place screws, which are used to fix the lower cover 13 directly to the middle frame 11. The remaining through-hole structure is used to expose the charging interface 18.

[0041] The top cover assembly 12 includes a top cover panel 122 and a sliding cover 123. The top cover panel 122 has latches on both sides, allowing it to connect to the bracket 14. The end face of the top cover panel 122 has a through hole 121, allowing the opening 1511 of the heating device 15 to be exposed, facilitating the assembly of the tobacco product 2 onto the smoking device 1. The sliding cover 123 is located on the same end face as the through hole 121. The sliding cover 123 is connected to the top cover panel 122 by a spring, and slides on the top cover panel 122 to cover or open the through hole 121. When the tobacco product 2 needs to be inserted, the sliding cover 123 is slid open to open the heating chamber of the heating device 15; when the tobacco product 2 is not needed, it is slid open to close the opening 1511 of the heating device 15. This prevents other objects from entering the heating chamber of the heating device 15 when the smoking device 1 is not in use.

[0042] The heating device 15 includes an electrothermal conversion element 151, which is used to form a heating cavity for accommodating the tobacco product 2. One end of the heating cavity has an opening 1511, and the other end is a closed structure.

[0043] The top cover assembly 12 has a through hole 121 exposing the opening 1511. The main control board 16 controls the electrothermal conversion element 151 to be energized, de-energized, or adjust the power supply according to the temperature of the electrothermal conversion element 151. The main control board 16 controls the temperature of the electrothermal conversion element 151 to heat, de-heat, or adjust the heating temperature of the tobacco product 2 in the heating chamber.

[0044] When a user smokes using the tobacco product directly heated smoking device 1, one end of the tobacco product 2 passes through the through hole 121 and the opening 1511 and is inserted into the heating chamber; the other end of the tobacco product 2 protrudes from the opening 1511 as a mouthpiece.

[0045] In some embodiments, the heating device 15 may be a three-section structure, namely: the heating device 15 includes a heating element, a neck member 155 and a positioning seat 156.

[0046] like Figure 6As shown, the heating device 15 also includes conductive pins 4, insulation cotton 154, and a temperature sensor 19. The heating element includes an injection molded part 152 and an electrothermal conversion element 151. The heating element is a combination of the electrothermal conversion element 151 and the injection molded part 152 formed in the mold. The injection molded part 152 is formed in the mold. The two ends of the electrothermal conversion element 151 are exposed on the outer surface of the injection molded part 152 for connecting the conductive pins 4, for example, by laser welding. The inner surface of the injection molded part 152 and the inner surface of the electrothermal conversion element 151 are on the same curved surface, forming a heating through hole 159 for accommodating the tobacco product 2.

[0047] It is understandable that the conductive pin 4 is electrically connected to the main control board 16, and the main control board 16 can directly obtain the resistance value of the electrothermal conversion element 151, thereby obtaining the temperature change of the electrothermal conversion element 151; if the main control board 16 detects the temperature change of the electrothermal conversion element 151 through the temperature sensor 19, then the temperature sensor 19 is placed on the outer surface of the electrothermal conversion element 151 and fixed with high-temperature resistant adhesive tape. The temperature sensor 19 is used to obtain the temperature change of the electrothermal conversion element 151, and the pin of the temperature sensor 19 can be electrically connected to the main control board 16. The main control board 16 obtains the temperature change of the electrothermal conversion element 151 through the temperature sensor 19.

[0048] The injection molded part 152 can be made of a high-temperature resistant material with low thermal conductivity, such as PEEK or PI. The inner surface of the injection molded part 152 and the inner surface of the electrothermal conversion element 151 are on the same curved surface. The injection molded part 152 tightly fixes the electrothermal conversion element 151, and there is no discontinuity between the inner surfaces of the injection molded part 152 and the electrothermal conversion element 151. This ensures that the inner surface of the formed heating through-hole 159 is smooth, guaranteeing smooth insertion of the tobacco product 2 into the heating through-hole 159 and preventing displacement of the electrothermal conversion element 151. When the tobacco shreds 22 of the tobacco product 2 are heated to generate aerosol, potentially producing tar, the smooth inner surface of the heating through-hole 159 facilitates cleaning. Furthermore, multiple hollow cavities 153 are formed on the outer surface of the injection molded part 152 during in-mold injection molding to expose portions of the electrothermal conversion element 151.

[0049] The neck part 155 is a hollow structure. One end of the neck part 155 is connected to one end of the injection molded part 152, and the other end of the neck part 155 is provided with an opening 1511.

[0050] like Figure 6As shown, the shape of the opening 1511 at the other end of the neck part 155 matches the shape of the heating through hole 159. One end of the neck part 155 is connected to one end of the injection molded part 152, and the end faces of the neck part 155 and the heating device do not contact each other. Furthermore, heat insulation rings 157 are placed at both ends of the heating device. The heat insulation rings 157 are integrated with one end of the neck part 155. One of the mating surfaces of one end of the neck part 155 is isolated by the heat insulation ring 157, and the other mating surface forms a structural gap 158, which is connected by the interference fit formed between the diameter 1521 of the outer surface of the heating device and the neck part 155. By adopting such a connection method of partial contact interference fit, the contact area between the heating device and the neck part 155 is effectively reduced, and the purpose is to prevent the heat of the heating device from being conducted to the neck part 155.

[0051] The neck piece 155 has three functions: First, it secures the tobacco product 2. Specifically, at least two protrusions 1513 are provided at the center of the opening 1511 to secure the tobacco product 2. Simultaneously, when the tobacco product 2 is inserted, it is deformed by the protrusions 1513, forming a groove as it passes through the heating through-hole 159, allowing air circulation and facilitating airflow from the opening 1511 of the heating device 15 into the ventilation chamber 5. Second, the inserted portion of the tobacco product 2 is compressed by the opening 1511, and after overall deformation, the tobacco product 2 matches the shape of the hollow channel of the electrothermal conversion element 151, allowing for a close fit. The design is more compact; thirdly, it incorporates a heat insulation ring 157 for heat dissipation. The neck component 155 can be made of plastic or a metal with good thermal conductivity, such as aluminum. When some tobacco products 2 require high temperatures, the second-end sponge segment 23 is heated due to heat conduction, causing mouth burns. To prevent mouth burns during inhalation, a metal material is used to dissipate heat from the second-end sponge segment 23. Simultaneously, when air circulates through the opening 1511, the grooves on the surface of the tobacco product 2, and the ventilation chamber 5, the heat from the surface of the second-end sponge segment 23 near the opening 1511 is carried into the ventilation chamber 5, effectively reducing the surface temperature of the second-end sponge segment 23. This helps solve the mouth burn problem and also reduces the user's inhalation resistance.

[0052] Positioning seat 156 has an open structure at one end and a closed structure at the other end; the open structure at one end of positioning seat 156 is connected to the other end of injection molded part 152; as shown... Figure 9 and Figure 10As shown, the inner bottom of the closed structure of the positioning seat 156 has at least one step 1512 for limiting the tobacco product 2. Similar to the connection between the neck piece 155 and the heating device, the heat insulation ring 157 is integrated with one end of the opening structure of the positioning seat 156. That is, the heat insulation rings 157 at both ends of the heating device are integrated with one end of the neck piece 155 and one end of the opening structure of the positioning seat 156, respectively, so that the end faces of the positioning seat 156 and the heating device do not contact each other. One of the mating surfaces of the opening structure of the positioning seat 156 is isolated by the heat insulation ring 157, and a structural gap 158 is formed on the other mating surface. The gap is connected by the interference fit formed between the diameter 1521 of the outer surface of the heating device and the positioning seat 156. This partial contact interference fit connection reduces the contact area between the heating device and the positioning seat 156, so as to prevent the heat of the heating device from being conducted to the positioning seat 156. The inner bottom of the closed structure of the positioning seat 156 has at least one step 1512 for limiting the tobacco product 2. When one end of the tobacco product 2 abuts against the step 1512, it forms a ventilation chamber 5 with the inner bottom of the positioning seat 156.

[0053] In some embodiments, the heating device 15 can be an integral unit, that is, the injection molded part 152, the electrothermal conversion element 151, the neck part 155, and the positioning seat 156 are molded and integrated into one unit during in-mold injection molding, without the need to separately distinguish between the neck part 155 and the positioning seat 156. The heating device 15 has a heating cavity, one end of which has an opening 1511, and the other end has a sealed structure. Other structures and functions can be referred to the three-section device, and will not be described in detail here.

[0054] like Figure 8 As shown, the injection molded part 152 of the heating device 15 forms one or more hollow cavities 153 during molding, and the heat insulation cotton 154 is wrapped around the outer surface of the injection molded part 152, forming an air insulation chamber with the heat insulation cotton 154 and the hollow cavity 153.

[0055] like Figure 9-12 As shown, Figure 11 The electrothermal conversion element 151 is in the shape of a cylindrical hole in a runway. Figure 12The electrothermal conversion element 151 is cylindrical in shape and includes one or more spiral coils 1510. The inner surface of the spiral coil 1510 is on the same curved surface as the inner surface of the injection molded part 152. The injection molded part 152 is combined with the spiral coil 1510 through in-mold injection molding. The spiral coil 1510 is fixed during the in-mold injection molding process. A distance 1515 is maintained between adjacent spiral coils 1510. The outer surface of the spiral coil 1510 is exposed in the hollow cavity 153 formed by the injection molded part 152. The temperature sensor 19 is placed on the outer surface of the spiral coil 1510 exposed in the plastic part. At least two protrusions 1513 are provided at the center of the opening 1511 of the heating cavity, which fix the tobacco product 2. When the tobacco product 2 is inserted, it can be squeezed and deformed by the protrusions 1513, forming a groove in the heating cavity for air circulation. At the same time, the inserted part of the tobacco product 2 is squeezed and deformed by the opening, matching the shape of the heating cavity for a tighter fit. The inner bottom of the closed structure at one end of the heating cavity has at least one step 1512 for limiting the tobacco product 2 and forming a ventilation chamber 5. There are at least two grooves between the inner surface of the heating cavity and the outer surface of the tobacco product 2. The opening 1511, the grooves and the ventilation chamber 5 form an air circulation channel.

[0056] During suction, such Figure 9 As indicated by the arrow, air flows from the opening 1511 along the groove formed by the protrusion 1513 on the tobacco product 2 to the ventilation chamber 5. The air in the ventilation chamber 5 passes through the first end sponge section 21, then through the middle tobacco section 22, and is drawn out from the second end sponge section 23 under suction. The air is heated as it enters the ventilation chamber 5 from the opening 121, ensuring that the air in the ventilation chamber 5 is always preheated. This minimizes the temperature fluctuation inside the middle tobacco section 22. Simultaneously, when air enters from the opening 1511, the heat from the surface of the second end sponge section 23 near the opening 1511 is carried into the ventilation chamber 5, effectively reducing the surface temperature of the second sponge section 23. This helps solve the problem of burning the mouth and also reduces the user's inhalation resistance.

[0057] In the embodiments of this application, when the smoking device 1 heats the tobacco product 2, the multiple hollow cavities 153 on the outer surface of the heating device 15 and the heat insulation cotton 154 form an air insulation chamber. The heating chamber formed by the heating device 15 surrounds the tobacco shreds 22 of the tobacco product 2, directly and precisely heating the tobacco product 2. This results in less heat loss compared to indirect heating, leading to a faster heating rate and higher heating efficiency for the tobacco shreds 22. Furthermore, since the first end sponge segment 21 of the tobacco product 2 abuts against the closed end of the heating chamber to form a ventilation chamber 5, and the opening 1511 forms an air circulation channel, air enters the ventilation chamber 5 from the opening 1511 of the heating device 15 along the groove, then enters from the first end sponge segment 21, passes through the tobacco shreds 22, and is then drawn out from the mouthpiece of the second end sponge segment 23. Thus, the heat on the surface of the second end sponge segment 23 is carried to the ventilation chamber 5, effectively reducing the surface temperature of the second end sponge segment 23 and preventing burns to the mouthpiece.

[0058] The main control board 16 integrates the software and hardware control systems of the smoking device 1, including a power switch, a working indicator light 161, heating device pads, temperature sensor pads, battery pads, motor pads, and control programs. Each pad is soldered to its corresponding component; for example, the heating device pad is soldered to the conductive pin 4 of the heating device 15, and the temperature sensor pad is soldered to the guide pin of the temperature sensor 19. The control program controls the energization, de-energization, or adjustment of the power supply of the electrothermal conversion element 151 based on its temperature, thereby heating, de-heating, or adjusting the heating temperature of the tobacco product 2 inside the heating chamber. The control program controls the overall working state of the smoking device 1 according to its settings.

[0059] Battery 17 supplies power to smoking device 1 and is installed in the receiving slot of bracket 14. The battery tabs of battery 17 are soldered to the battery pads of main control board 16.

[0060] The working indicator light 161 and the light guide column 162 are four lights soldered on the main control board 16. The position of the working indicator light 161 corresponds to the position of the observation window 111 of the middle frame 11. The light guide column 162 is sleeved around the indicator light and is fixedly connected to the main control board 16. It is used to guide the light of the working indicator light 161 to the observation window 111 of the middle frame 11 to display the working status of the smoking device 1.

[0061] It should be noted that the number of indicator lights 161 is not limited to 4; it can also be other numbers, such as 2-6. Therefore, the corresponding number of light guide pillars 162 would be 2-6.

[0062] The power button 3 is located directly above the power switch on the main control board 16, placed on the inner wall of the middle frame 11 and exposed in the middle frame 11, and is used to control the switch of the smoking device 1 and check the battery power of the battery 17.

[0063] The charging port 18 uses a Type-C interface to charge the battery 17. It is fixed to one end of the bracket 14 and exposes the lower cover 13. It is soldered to the main control board 16 via FPC.

[0064] Motor 163 is fixed on bracket 14 and is soldered to motor 163 pad on main control board 16 for tactile indication of the working status of smoking device 1.

[0065] The specific implementation process is as follows:

[0066] The main control board 16 is initially fixed on the bracket 14. The light guide column 162 is looped around the working indicator light 161 and fixed on the main control board 16. The power button 3 is assembled inside the window of the middle frame 11 and protrudes from the outer surface of the middle frame 11. The sliding cover 123 and the upper cover panel 122 are connected to the upper cover assembly 12 by a spring device. Then, the heating device 15, battery 17, charging interface 18, and motor 163 are assembled on the bracket 14. The electrodes of the battery 17, the conductive pins 4 of the heating device, the leads of the temperature sensor 19, the charging interface 18 FPC, and the leads of the motor 163 are soldered to the main board. The upper rear cover assembly 12 is assembled with the bracket 14. After assembly, the entire assembly is inserted into the middle frame 11 from the front end of the middle frame 11. When it reaches the assembly position, a "click" sound will be heard. At this time, the opening of the heating device 15 is completely aligned with the through hole 121 of the upper cover assembly 12, the four indicator lights match the observation window 111 of the middle frame 11, and the power button 3 is located directly above the power switch. Next, the lower cover 13 is assembled on the other end of the middle frame 11. When it reaches the assembly position, a "click" sound will be heard again. Finally, the lower cover 13 and the bracket 14 are locked with two screws to complete the assembly.

[0067] The working principle of the smoking device 1 in this application is as follows: After the user presses the power button 3, the number of lights on the working indicator 161 represents the battery level of 17. For example, all four lights on represent a full charge of 17, and three lights on represent 70% remaining charge. The user slides open the sliding cover 123 and inserts the tobacco product 2 into the heating chamber. Pressing and holding the power button for 33 seconds starts the smoking device 1. At the same time, the motor 163 vibrates once, and the working indicator lights 161 will light up from bottom to top to indicate that the smoking device 1 is heating the tobacco product 2. When all four lights are on, the motor... A single vibration (163) indicates that tobacco product 2 is heated and ready for smoking. The smoking time for one tobacco product 2 is set to 5 minutes. During smoking, the four lights will gradually turn off, indicating the smoking time is about to end. With 30 seconds remaining, the bottom light will flash continuously, and motor 163 will vibrate once, indicating that there are 30 seconds left in the smoking time. After this time, all indicator lights (161) will turn off. The smoking device 1 is in operation. Pressing the power button (3) will stop the device and turn off all indicator lights.

[0068] When the user charges the smoking device 1, the user inserts the USB charging cable to charge the battery 17. The indicator lights flash from bottom to top according to the battery 17's power level. The number of working indicator lights 161 that are lit represents the battery 17's power level. For example, if 3 lights are lit continuously and the 4th light is flashing, it means that the battery 17 has more than 70% power. When fully charged, all working indicator lights 161 are lit.

[0069] The smoking device 1 of this application adopts an integrated direct heating device 15. The heating cavity formed by the heating device 15 surrounds the tobacco shreds 22 of the tobacco product 2, directly and precisely heating the tobacco product 2. The multiple hollow cavities 153 on the outer surface of the heating device 15 can form an air insulation chamber, which reduces heat loss compared to indirect heating, resulting in a faster heating rate and higher heating efficiency for the tobacco shreds 22. It achieves the heating effect without requiring excessively high temperatures, preventing the surface of the tobacco product 2 from burning before the internal temperature of the tobacco shreds 22 reaches the desired smoking temperature. Furthermore, the tobacco product 2's... One end of the sponge segment 21 abuts against the closed end of the heating chamber to form a ventilation chamber 5. Combined with the opening 1511, this forms an airflow channel. Air enters the ventilation chamber 5 from the opening 1511 along the groove, then enters from the first end of the sponge segment 21, passes through the tobacco segment 22, and is drawn out from the sponge segment mouthpiece. Simultaneously, when airflow occurs through the opening 1511, the groove on the surface of the tobacco product 2, and the ventilation chamber 5, heat from the surface of the second end of the sponge segment 23 near the opening 1511 is carried into the ventilation chamber 5, effectively reducing the surface temperature of the second end of the sponge segment 23. The opening 1511 of the heating device 15 has a heat dissipation function, effectively cooling the sponge segment mouthpiece and completely solving the problem of scalding the mouthpiece, while also reducing the user's suction resistance. The tobacco product 2 compatible with the smoking device 1 is not limited; it does not require a specific tobacco product 2, such as one containing a metal plate.

[0070] The above description is merely a preferred embodiment of this application. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this application. Furthermore, under the teachings of this application, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this application. Therefore, this application is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this application.

Claims

1. A tobacco product direct heating smoking device, characterized in that, It includes a middle frame, an upper cover assembly, and a lower cover. The upper cover assembly is fixedly connected to one end of the middle frame, and the lower cover is fixedly connected to the other end of the middle frame. The middle frame, the upper cover assembly, and the lower cover together form a receiving cavity. The cavity contains a support, a heating device, a main control board, and a battery. The heating device and the main control board are respectively fixed to one end of the support. The battery is fixed in the receiving groove formed by the support. One end of the lead wire of the charging interface is soldered to the main control board and fixed by the support. The other end of the lead wire of the charging interface is connected to the charging interface. The charging interface extends from the other end of the support and protrudes from the lower cover. The conductive pins of the heating device, the tabs of the battery, and the lead wire of the charging interface are all soldered to the main control board so that the heating device, the battery, and the charging interface are all electrically connected to the main control board. The heating device includes an electrothermal conversion element, which is used to form a heating cavity for accommodating tobacco products. One end of the heating cavity has an opening, and the other end has a closed structure. The upper cover assembly has a through hole exposing the opening, and the main control board controls the power supply of the electrothermal conversion element to be turned on or off, or adjusts the power supply level, according to the temperature of the electrothermal conversion element.

2. The tobacco product direct heating smoking device according to claim 1, characterized in that, The heating device also includes an injection molded part. The heating device is a combination of the electrothermal conversion element and the injection molded part through in-mold injection molding. The injection molded part is formed in-mold injection molding. The two ends of the electrothermal conversion element are exposed on the outer surface of the injection molded part for connecting the conductive pins. The inner surface of the injection molded part and the inner surface of the electrothermal conversion element are on the same curved surface to form the heating cavity.

3. The tobacco product direct heating smoking device according to claim 2, characterized in that, The heating device has one or more hollow cavities; the heating device also includes heat insulation cotton, which wraps the outer surface of the injection molded part, and the heat insulation cotton and the hollow cavity form an air insulation chamber.

4. The tobacco product direct heating smoking device according to claim 3, characterized in that, The electrothermal conversion element includes one or more spiral coils. The inner surface of the spiral coil is on the same curved surface as the inner surface of the injection molded part. The injection molded part is combined with the spiral coil through in-mold injection molding. The spiral coil is fixed during the in-mold injection molding process. A distance is maintained between adjacent spiral coils. The outer surface portion of the spiral coil is exposed in the hollow cavity formed by the injection molded part.

5. The tobacco product direct heating smoking device according to claim 1, characterized in that, The bottom of the closed structure at one end of the heating cavity has at least one step for limiting the tobacco product and forming a ventilation chamber.

6. The tobacco product direct heating smoking device according to claim 5, characterized in that, The inner surface of the heating cavity and the outer surface of the tobacco product have at least two grooves, and the opening, the grooves and the ventilation chamber form an air circulation channel.

7. The tobacco product direct heating smoking device according to claim 6, characterized in that, At least two protrusions are provided at the opening toward the center of the opening, and the tobacco product can be deformed by the protrusions to form the groove when inserted into the heating cavity.

8. The tobacco product direct heating smoking device according to claim 1, characterized in that, The middle frame is provided with several observation windows, and the main control board is welded with several working indicator lights for displaying the working status of the smoking device. The positions of the working indicator lights correspond to the positions of the observation windows. A light guide column is sleeved around the working indicator light. The light guide column is fixedly connected to the main control board. The light guide column is used to guide the light of the working indicator light to the middle frame so that the light of the working indicator light is displayed in the observation window.

9. The tobacco product direct heating smoking device according to claim 1, characterized in that, The top cover assembly includes a top cover panel and a sliding cover. The top cover panel has the through hole, and the through hole and the sliding cover are located on the same end face of the top cover panel. The sliding cover is connected to the top cover panel by a spring, and the sliding cover slides on the top cover panel to cover or open the through hole.

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