Heating structure for heating smoking set and heating smoking set

Abstract

The invention provides a heating structure for a heating smoking set and the heating smoking set, and belongs to the technical field of smoking articles. The heating structure used in the heating smoking set comprises a heating body which comprises a heating end and a positioning end, and the heating end is inserted into a cigarette to heat a tobacco material in the cigarette; the base is of a hollow columnar structure, the positioning end is installed in an opening in the middle of the base, the heating end extends out of the opening in the middle of the base, and the side, away from the heating end, of the positioning end is electrically connected with the outside; the support is of a hollow columnar structure, and the base is installed in an opening in the middle of the support in a sliding mode; the flexible element is located between the base and the support, one end of the flexible element is installed on the base, the other end of the flexible element is installed on the support, and the flexible element deforms along with temperature changes; when the flexible element deforms, the base and the heating body are pushed to rotate relative to the support, so that the heating end rotates relative to the cigarette, and the heating body is prevented from being bonded with the tobacco material.

Description

Technical Field

[0001] The invention belongs to the technical field of smoking articles, and in particular relates to a heating structure used in a heating smoking article and the heating smoking article. Background Art

[0002] When traditional tobacco is burned, it releases nicotine and produces a large amount of harmful substances such as tar and carbon monoxide, which have an adverse effect on consumers' health, and sidestream smoke also pollutes the environment. As people pay more and more attention to health, more consumers choose heated cigarettes that taste similar to traditional tobacco as a substitute for nicotine intake. Heated cigarettes generally heat tobacco by electric heating of a heating device rather than burning tobacco, so they release fewer harmful substances and almost no sidestream smoke is produced.

[0003] Electric heating generally includes center heating and edge heating. The heating element of center heating is generally a cylinder or a sheet. When in use, the heating element is inserted from the end of the cigarette and in direct contact with the tobacco. The heating element must maintain a relatively high temperature during heating, reaching above 300°C at the highest. When tobacco is heated, physical and chemical reactions such as evaporation, oxidation, and thermal cracking will occur, making the tobacco adhere to the heating element and not easy to fall off. When the user pulls out the cigarette from the cavity of the heating device, the tobacco will be separated from the outer layer of cigarette paper as a whole, adhere to the heating element and remain in the heating cavity, causing the heating device to be unable to be used normally again and cleaning is also more troublesome. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a heating structure for a heated smoking device and a heated smoking device, in order to at least partially solve the above technical problems. The specific technical solutions provided by the present invention are as follows.

[0005] As a first aspect of the present invention, a heating structure for heating a smoking device is provided, comprising:

[0006] A heating element, comprising a heating end and a positioning end, wherein the heating end is inserted into the cigarette to heat the tobacco material in the cigarette;

[0007] The base is a hollow columnar structure, the positioning end is installed in the opening in the middle of the base, the heating end extends out of the opening in the middle of the base, and the side of the positioning end away from the heating end forms an electrical connection with the outside world;

[0008] The bracket is a hollow columnar structure, and the base is slidably mounted in the opening in the middle of the bracket; and

[0009] The flexible element is located between the base and the bracket, one end of the flexible element is mounted on the base, and the other end of the flexible element is mounted on the bracket, and the flexible element deforms with temperature changes;

[0010] When the flexible element is deformed, the base and the heating element are pushed to rotate relative to the bracket, so that the heating end rotates relative to the cigarette, preventing the heating element from sticking to the tobacco material.

[0011] As a second aspect of the present invention, a heating smoking device is provided, comprising:

[0012] A heating structure as described above;

[0013] A control component, electrically connected to the positioning end of the heating element in the heating structure, for controlling the operation of the heating element; and

[0014] The shell is used to accommodate the heating structure and the control component, and the bracket in the heating structure is installed on the shell.

[0015] In an embodiment of the present invention, a heating structure for a heated smoking device and a heated smoking device are provided. The heating structure for a heated smoking device includes a heating element, a base, a bracket and a flexible element. When the heating element is working, high temperature is generated, part of the heat is transferred to the base, and then conducted to the flexible element by the base. The flexible element will deform when the temperature changes, and drive the base and the heating element to rotate, which can effectively prevent the heating element from bonding with the tobacco material. This heating structure can prevent the bonding between the heating element and the tobacco material, reduce the damage to the heating element caused by the external force peeling off the adhesive, thereby extending the service life of the heating element, reducing the frequency of users replacing the heating element, and reducing the cost of use. At the same time, if the heating element is bonded to the tobacco material, it will affect the conduction and distribution of heat in the tobacco material. Because the heat transfer of the bonded part will cause local overheating due to too close contact, and the tobacco material in the non-bonded area will be insufficiently heated. By rotating the heating element, this uneven contact can be avoided, so that the heat can be more evenly transferred to the tobacco material, improve the overall heating efficiency of the heated smoking device, and reduce the waste of tobacco caused by local overheating or uneven heating.

[0016] In an embodiment of the present invention, the heating smoking device prepared by using the above-mentioned heating structure can prevent the heating element and the tobacco material from sticking together, so that the tobacco material is heated more evenly each time it is used, and a stable taste can be ensured. After use, because there is no adhesion problem, the cigarette can be directly pulled out after smoking, which is convenient to operate. The heating element can rotate relative to the bracket according to temperature changes and the need to prevent adhesion, so that heat can be more evenly transferred to various parts of the tobacco material. This is not only conducive to the full dissipation of the aroma of the tobacco material, but also can avoid safety hazards such as local overheating leading to the burning of the tobacco material, thereby ensuring the safety performance of the heating smoking device. The rotation of the heating element is completely realized by a mechanical structure, and no detection circuit is required, which improves reliability, and the structure is compact and low in cost. The service life of the heating element in the heating smoking device is extended, which can reduce the frequency of repair or replacement of the entire heating smoking device due to damage to the heating element. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a heating structure used in a heating smoking device according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 Schematic diagram of the flexible element in the AA direction before deformation;

[0019] Figure 3 for Figure 1 Schematic diagram of the flexible element after deformation in the AA direction;

[0020] Figure 4 is a graph showing the relationship between the rotation angle θ and the temperature T when the flexible element is a shape memory alloy having a two-way shape memory effect in an embodiment of the present invention;

[0021] Figure 5 is a graph showing the relationship between the rotation angle θ and the temperature T when the flexible element is a multi-layer metal sheet structure in an embodiment of the present invention;

[0022] Figure 6 Schematic diagram of the structure of the heating smoking device in an embodiment of the present invention.

[0023] Description of reference numerals:

[0024] 1-heating element; 11-heating end; 12-positioning end;

[0025] 2- Base;

[0026] 3- Bracket;

[0027] 4-Flexible element;

[0028] 5-cigarette; 51-tobacco material;

[0029] 6- housing;

[0030] 7- Power supply;

[0031] 8- Circuit board;

[0032] 9- Wires. DETAILED DESCRIPTION

[0033] Below, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of embodiments of the present invention. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of concepts of the present invention.

[0034] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0035] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0036] In order to solve the problem of tobacco material adhering to the heating element, the prior art generally sets a booster structure to help remove the cigarette from the heating element. For example, in an extractor for heating tobacco, the cigarette is heated in the extractor. After the heating is completed, the extractor is pushed to separate the cigarette from the heating element. Then the cigarette is pulled out of the extractor and the extractor is reset. This method is cumbersome to operate and has a high cost of action. In actual use, it is often forgotten to push the extractor, resulting in tobacco left in the extractor. Alternatively, a motion mechanism for heating tobacco, after the heating of the cigarette is completed, the motor and transmission mechanism are used to move the heating element downward to separate from the cigarette, and the Hall switch is used to limit the movement of the heating element. This method has a complex structure, which increases the failure rate of the tobacco, has more components, which makes the cost of the tobacco, and the driving components take up too much space, making it impossible to miniaturize the tobacco, and the movement process will generate noise, affecting the consumer experience.

[0037] Based on this, in order to provide a heating device that can solve the problem of tobacco material and heating element adhesion and has low cost, easy operation and compact size, the present invention provides a heating structure used in a heating device and a heating device. The heating structure used in the heating device includes a heating element, a base, a bracket and a flexible element. The flexible element can deform with temperature changes. This deformation drives the base to drive the heating element to rotate relative to the bracket to prevent the heating element from adhering to the tobacco material.

[0038] Figure 1 This is a schematic diagram of the structure of a heating structure used in a heating smoking device according to an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the flexible element in the AA direction before deformation; Figure 3 for Figure 1 Schematic diagram of the flexible element after deformation in the AA direction.

[0039] As a first aspect of the present invention, a heating structure for heating a smoking device is provided, such as Figure 1-Figure 3As shown, it includes: a heating body 1, including a heating end 11 and a positioning end 12, the heating end 11 is inserted into the cigarette to heat the tobacco material 51 in the cigarette 5; a base 2, which is a hollow columnar structure, the positioning end 12 is installed in the opening in the middle of the base 2, the heating end 13 extends out from the opening in the middle of the base 2, and the side of the positioning end 12 away from the heating end 11 forms an electrical connection with the outside world; a bracket 3, which is a hollow columnar structure, the base 2 is slidably installed in the opening in the middle of the bracket 3; and a flexible element 4, which is located between the base 2 and the bracket 3, one end of the flexible element 4 is installed on the base 2, and the other end of the flexible element 4 is installed on the bracket 3, and the flexible element 4 deforms with temperature changes; wherein, when the flexible element 4 is deformed, the base 2 and the heating body 1 are pushed to rotate relative to the bracket 3, so that the heating end 11 rotates relative to the cigarette 5, thereby preventing the heating body 1 from bonding with the tobacco material 51.

[0040] In an embodiment of the present invention, the heating structure used in the heating smoking device includes a heating element 1, a base 2, a bracket 3 and a flexible element 4. When the heating element 1 is working, high temperature is generated, and part of the heat is transferred to the base 2, and then conducted to the flexible element 4 by the base 2. The flexible element 4 will deform when the temperature changes, and drive the base 2 and the heating element 1 to rotate, which can effectively prevent the heating element 1 from bonding with the tobacco material 51. This heating structure can prevent the bonding between the heating element 1 and the tobacco material 51, reduce the damage to the heating element 1 caused by the external force peeling off the adhesive, thereby extending the service life of the heating element 1, reducing the frequency of users replacing the heating element 1, and reducing the cost of use. At the same time, if the heating element 1 is bonded to the tobacco material 51, it will affect the conduction and distribution of heat in the tobacco material 51. Because the heat transfer of the bonding part will cause local overheating due to the close contact, and the tobacco material 51 in the non-bonding area will not be heated enough. By rotating the heating element 1, such uneven contact can be avoided, so that the heat can be transferred to the tobacco material 51 more evenly, thereby improving the heating efficiency of the heating device as a whole and reducing tobacco waste caused by local overheating or uneven heating.

[0041] According to an embodiment of the present invention, the flexible element 4 is composed of a shape memory alloy with a two-way shape memory effect or at least two layers of metal sheets with different thermal expansion coefficients. The shape memory alloy with a two-way shape memory effect can be a Ni-Ti series shape memory alloy, such as Ti-50Ni, Ti-20Ni-30Cu, etc., but the present invention is not limited thereto. The thermal expansion coefficient of the metal close to the bracket side in at least two layers of metal sheets is greater than the thermal expansion coefficient of the metal close to the base side, such as a combination of nickel-iron alloy-nickel-copper alloy, copper-zinc, and iron-aluminum, but the present invention is not limited thereto. The thickness of each layer of metal sheet is 0.01-1mm, and the adjacent two layers of metal sheets are in close physical contact, and can be formed by welding, riveting, lamination, etc., but the present invention is not limited thereto. The full deformation temperature of the flexible element 4 is 40-150°C.

[0042] Figure 4 is a graph showing the relationship between the rotation angle θ and the temperature T when the flexible element is a shape memory alloy having a two-way shape memory effect in an embodiment of the present invention; Figure 5 FIG. 4 is a graph showing the relationship between the rotation angle θ and the temperature T when the flexible element is a multi-layer metal sheet structure in an embodiment of the present invention.

[0043] like Figure 4 and Figure 5 As shown, the flexible element 4 gradually deforms with the temperature. When the temperature drops, the flexible element 4 gradually resets. The deformation of the flexible element 4 drives the base 2 and the heating element 1 to rotate. This rotation is particularly obvious in the heating stage when the heating element 1 starts to heat and in the cooling stage after the heating element 1 stops working.

[0044] like Figure 4 As shown, when the flexible element 4 is made of a shape memory alloy with a two-way shape memory effect, as the temperature T gradually increases, the rotation angle θ begins to increase slowly, and then the rate of increase accelerates, showing a more obvious upward trend, indicating that during the heating process, the flexible element 4 deforms as the temperature increases, and the rotation angle continues to increase. When the temperature reaches a certain value and begins to cool down, the rotation angle θ does not return along the original curve during heating, but decreases slowly at the beginning of cooling, then the rate of decrease accelerates, and finally returns to a lower angle value, reflecting the two-way shape memory effect, that is, the heating and cooling processes change along different paths, and can memorize two different shape states at different temperatures, which is reflected by the change in the rotation angle.

[0045] like Figure 5 As shown, when the flexible element 4 is composed of at least two layers of metal sheets with different thermal expansion coefficients, the rotation angle θ continues to increase as the temperature T increases. This shows that when the temperature rises, the flexible element 4 will deform and the rotation angle will continue to increase. When the temperature reaches a certain value and starts to cool down, the rotation angle θ returns along the original curve when the temperature rises. This phenomenon is based on the characteristics of multi-layer metal sheets. Since the thermal expansion coefficients of at least two layers of metal sheets constituting the flexible element 4 are different, when the temperature changes, the expansion or contraction degrees are different, causing the flexible element 4 to bend and rotate as a whole. The higher the temperature, the greater the difference in the expansion degree of the two adjacent layers of metal sheets, and thus the greater the rotation angle θ of the flexible element 4.

[0046] According to an embodiment of the present invention, the contact surface between the base 2 and the bracket 3 is provided with a positioning groove recessed inwards, and the positioning groove on the base 2 and the positioning groove on the bracket 3 form a space for accommodating the flexible element 4 .

[0047] In the embodiment of the present invention, the flexible element 4 is deformed and reset in the space formed by the base 2 and the bracket 3 to promote the base 2 to rotate relative to the bracket 3. The positioning grooves on the base 2 and the bracket 3 play a precise positioning role for the flexible element 4, ensuring its stable position between the base 2 and the bracket 3, so that the flexible element 4 can move in the expected manner and direction when deformed by temperature changes, thereby ensuring the reliability of the overall function of the heating structure. At the same time, the accommodation space formed by the positioning groove can play a certain protective role for the flexible element 4, preventing it from being accidentally squeezed, collided, etc. inside the heating structure, and extending the service life of the flexible element 4. The relative position of the positioning grooves on the base 2 and the bracket 3 can be set according to the situation, preferably set in the middle part of the contact surface between the base 2 and the bracket 3. When the flexible element 4 is deformed during operation, the force generated will be more evenly distributed on the base 2 and the bracket 3. Because the positioning groove is in the middle position, the force applied by the flexible element 4 to the base 2 and the bracket 3 can be transmitted more symmetrically, avoiding uneven force caused by the offset of the positioning groove, helping to maintain the overall mechanical balance of the heating structure, and preventing local deformation or damage due to uneven force, thereby improving the stability and reliability of the heating structure.

[0048] like Figure 2 and Figure 3 As shown, before the flexible element 4 is deformed, it is close to the base 2. As the heating element 1 is heated, part of the heat is transferred to the base 2 and further to the flexible element 4. The flexible element 4 is deformed with the temperature and gradually approaches the bracket 3. When the heating element 1 stops heating, the flexible element 4 is gradually reset as the temperature drops, and returns to a position close to the base 2 from a position close to the bracket 3.

[0049] In the embodiment of the present invention, since the heating element 1 generates a high temperature of 250-350°C when working, this puts forward extremely high performance requirements for the base 2 that closely cooperates with it. Therefore, the base 2 is set to be a high temperature resistant material, which will not deform or crack at 200°C and will not release toxic and harmful substances. The material of the base 2 can be a polymer, such as polyetheretherketone (PEEK), or ceramic, metal, etc., and the present invention is not limited thereto.

[0050] According to the embodiment of the present invention, a hole is respectively formed in the positioning groove on the base 2 and the positioning groove on the bracket 3 , and two ends of the flexible element 4 are fixed by the holes on the base 2 and the holes on the bracket 3 , respectively.

[0051] In the embodiment of the present invention, the holes in the two positioning grooves can provide precise positioning for the flexible element 4, so that it is in an accurate position in the heating structure, which helps to improve the assembly accuracy and operation stability of the entire heating structure. The fixing method of the holes can effectively limit the movement of the flexible element 4 in all directions, including displacement parallel to the direction of the heating element 1 and movement perpendicular to the direction of the heating element 1. Even if it is subjected to external forces such as vibration and impact during the operation of the heating structure, its position can be maintained unchanged, thereby ensuring the reliability of the heating structure. The holes fix the two ends of the flexible element 4, which can make the transmission of force of the flexible element 4 more stable and uniform when it is subjected to force (such as deformation force caused by temperature changes), thereby ensuring the stability of the mechanical properties of the heating structure during operation.

[0052] In other embodiments of the present invention, the connection between the flexible element 4 and the base 2 and the bracket 3 may also be achieved by welding, snapping, bonding, riveting, etc., but the present invention is not limited thereto.

[0053] According to an embodiment of the present invention, the heating element 1 is made of a resistive material. In some embodiments of the present invention, the heating element 1 is made of metal materials such as nickel-chromium alloy, iron-chromium-aluminum alloy, etc. The metal material has a high resistivity and can quickly generate heat when powered on, meeting the requirements of the heating device for the heating speed. At the same time, it has a high mechanical strength, is not easy to deform, and can withstand the changes in thermal stress during heating and cooling. In other embodiments of the present invention, the heating element 1 is made of ceramic materials such as aluminum nitride ceramics and zirconium oxide ceramics. Ceramic materials have good high temperature resistance and can withstand high heating temperatures without deformation or damage. At the same time, they also have extremely high hardness and wear resistance, which can effectively resist the mechanical wear that may occur during the heating process and ensure the structural integrity of the heating element 1. In some other embodiments of the present invention, the heating element 1 is made of materials such as carbon fiber and graphene. Carbon fiber has a high specific strength and specific modulus, is light in weight but high in strength, and can reduce the overall weight of the heating device while maintaining good performance, thereby improving the portability of the product. The resistivity can be adjusted as needed, and different heating powers can be achieved to meet the needs of different users for heating temperature and taste. The thermal stability is good, and it is not easy to overheat or have excessive temperature fluctuations during the heating process, and a stable heating effect can be provided. Graphene has excellent electrical properties and high thermal conductivity, can quickly conduct electricity and generate heat, and can evenly distribute heat in the heating area, so that the tobacco material 51 is heated more evenly and the taste is improved. At the same time, it also has good chemical stability and flexibility, can maintain stable performance under different working environments, and is not easy to be damaged. In addition, graphene also has certain antibacterial properties, which helps to keep the heating element 1 clean and hygienic.

[0054] According to an embodiment of the present invention, the heating end 11 is configured to be a shape in which a frustum portion is connected to a cylindrical portion, and the area of ​​the frustum portion away from the end face of the cylindrical portion is smaller than the cross-sectional area of ​​the cylindrical portion, so as to facilitate the insertion of the heating end 11 into the cigarette 5. The frustum portion of the heating end 11 is similar to a sharp head, which can be inserted into the cigarette 5 more easily, reducing damage to the cigarette 5 during insertion, ensuring the integrity of the structure of the cigarette 5, and improving the user experience. The contact area between the cylindrical portion of the heating end 11 and the tobacco material 51 in the cigarette 5 is relatively stable, which can transfer heat to the tobacco material 51 more evenly during heating, helping to achieve a more stable and sufficient heating effect and improving the performance of the heating structure.

[0055] According to an embodiment of the present invention, the positioning end 12 is configured to be in a shape that is compatible with the opening in the middle of the base 2. The positioning end 12 is relatively fixed to the base 2 so that when the flexible element 4 drives the base 2 to rotate, the heating element 1 can be driven to rotate together. This allows the heating element 1 to change the heating position or angle during the heating process, so that the tobacco material 51 in the cigarette 5 can be heated more comprehensively and evenly, thereby improving the uniformity and effect of the heating. The relatively fixed connection method can ensure the stability of the structure between the heating element 1 and the base 2. During the operation of the heating structure, especially when the flexible element 4 drives the base 2 to rotate, the heating element 1 will not become loose or shifted, thereby ensuring the reliable operation of the heating structure and extending its service life.

[0056] Figure 6 Schematic diagram of the structure of the heating smoking device in an embodiment of the present invention.

[0057] As a second aspect of the present invention, a heating smoking device is provided, such as Figure 6 As shown, it comprises: the heating structure as described above; a control component, which is electrically connected to the positioning end 12 of the heating element 1 in the heating structure and is used to control the operation of the heating element 1; and a housing 6, which is used to accommodate the heating structure and the control component, and the bracket 3 in the heating structure is installed on the housing 6. Since the positioning end 11 of the heating element 1 in the heating structure is electrically connected to the control component, the positioning end can also be called a wiring terminal.

[0058] In the embodiment of the present invention, the heating smoking device prepared by using the above-mentioned heating structure can prevent the heating element 1 and the tobacco material 51 from adhering to each other, so that the tobacco material 51 is heated more evenly each time it is used, and a stable taste can be ensured. After use, because there is no adhesion problem, the cigarette 5 can be directly pulled out after smoking, which is convenient to operate. The heating element 1 can rotate relative to the bracket 3 according to the temperature change and the need to prevent adhesion, so that the heat can be more evenly transferred to each part of the tobacco material 51. This is not only conducive to the full dissipation of the fragrance of the tobacco material 51, but also can avoid local overheating leading to the burning of the tobacco material 51 and other safety hazards, thereby ensuring the safety performance of the heating smoking device. The rotation of the heating element 1 is completely realized by a mechanical structure, and no detection circuit is required, which improves reliability, and the structure is compact and low in cost. The service life of the heating element 1 in the heating smoking device is extended, which can reduce the frequency of repair or replacement of the entire heating smoking device due to damage to the heating element 1.

[0059] According to an embodiment of the present invention, the control component includes: a power supply 7 , a circuit board 8 and a wire 9 .

[0060] In the embodiment of the present invention, the power source 7 is used to provide energy for the heating smoking device, and can be a zinc-manganese battery, a zinc-silver battery, a cadmium-nickel battery, a hydrogen-nickel battery, a lead-acid battery, a lithium-ion battery, a capacitor battery, etc., but the present invention is not limited thereto.

[0061] In the embodiment of the present invention, the circuit board 8 is used to control the operation of the heating device and is electrically connected to the power supply 7. When the heating device is started, the circuit board 8 controls the start and end of the heating process according to the user's operating instructions. In addition, the circuit board 8 can also integrate a variety of protection functions, such as overcurrent protection, overvoltage protection and short circuit protection; it can also communicate with other components, for example, through Bluetooth or other wireless communication modules, to achieve the connection between the heating device and smart devices such as mobile phones. Users can remotely control and monitor the status of the heating device through the mobile phone APP, bringing more intelligent functions to the heating device.

[0062] In an embodiment of the present invention, the wire 9 is used to connect the positioning end 12 of the heating element 1 in the heating structure with the circuit board 8. The wire 9 is made of a flexible material so that it can still maintain a good electrical connection with the circuit board 8 when the heating element 1 rotates. In the heating smoking device, since the heating element 1 rotates, it is very important to use a wire 9 made of a flexible material. This flexible property allows the wire 9 to be flexibly bent and twisted without breaking or being damaged when the heating element 1 rotates, thereby always ensuring that it maintains a good electrical connection with the positioning end 12 of the heating element 1 in the heating structure and the circuit board 8. This is very important for ensuring the continuous and stable operation of the heating smoking device, because once the wire 9 is damaged due to the rotation of the heating element 1, it will directly affect the normal heating function of the heating smoking device, and may even cause a short circuit or open circuit, affecting the safety and service life of the entire heating smoking device. The material of the wire 9 can be metals such as copper, aluminum, nickel, silver, or carbon fiber composite wires, organic conductive polymer wires, etc., but the present invention is not limited thereto.

[0063] According to an embodiment of the present invention, a heating cavity for inserting a cigarette 5 is formed in the housing 6. The heating end 11 of the heating element 1 in the heating structure extends from the opening in the middle of the base 2 into the heating cavity. The friction between the inner wall of the heating cavity and the cigarette 5 is greater than the friction between the heating end 11 and the cigarette 5, so that when the flexible element 4 drives the base 2 and the heating element 1 to rotate, the cigarette 5 is relatively fixed, ensuring that the cigarette 5 will not rotate during the heating process, making the heating operation more stable, avoiding uneven heating or damage to the tobacco material 51 inside the cigarette 5 due to the rotation of the cigarette 5, thereby improving the heating performance and reliability of the heating device. Avoiding damage to the internal structure of the cigarette 5 caused by rotation during the heating process, ensuring the integrity of the cigarette, helping to improve the user experience, and ensuring that the tobacco material 51 can be heated in a relatively stable state, ensuring the flavor and taste of the tobacco. During the heating process, since the cigarette 5 is relatively fixed, the normal operation of the heating structure and the control component will not be affected by the accidental movement of the cigarette 5, ensuring the structural stability of the entire heating device, and reducing the risk of failure and damage caused by the change in the position of the cigarette 5.

[0064] In some embodiments of the present invention, the material of the inner wall of the heating chamber can be processed into a surface with a certain degree of roughness, for example, the inner wall material is frosted to increase its surface roughness, thereby increasing the friction between the heating end 11 and the cigarette 5. As for the heating end 11, a relatively smooth material can be used or its surface can be polished to reduce the friction coefficient between the heating end 11 and the cigarette 5, so that the friction between the inner wall of the heating chamber and the cigarette 5 is greater.

[0065] In other embodiments of the present invention, the inner wall of the heating chamber is made of a material with a high friction coefficient, such as rubber, silicone, etc., which will generate a large friction force when in contact with the surface of the cigarette 5. The heating end 11 can be made of a material such as metal or ceramic, which has a relatively small friction force with the cigarette 5.

[0066] In some other embodiments of the present invention, tiny protrusions or texture structures, such as tiny serrated structures or dot-shaped protrusions, are provided on the inner wall of the heating chamber, and when the cigarette 5 is inserted, these structures increase the contact area and friction with the cigarette 5. The heating end 11 maintains its smooth or relatively simple surface structure to avoid generating additional friction.

[0067] In some other embodiments of the present invention, the inner wall of the heating chamber may be made of a material with adsorption properties, such as an electrostatic adsorption material or a sticky material (but it should be noted that this stickiness should not affect the normal insertion and removal of the cigarette 5). When the cigarette 5 is inserted, it will be subjected to adsorption force, thereby increasing the friction force. The heating end 11 may be made of ordinary metal or alloy material, and the friction between it and the cigarette 5 is relatively small by ordinary contact. It should be understood that the optional way of setting the friction between the inner wall of the heating chamber and the cigarette 5 to be greater than the friction between the heating end 11 and the cigarette 5 is not intended to limit the present invention, and other ways that can achieve the same effect can also be used, and the present invention is not limited thereto.

[0068] It should be noted that the layout of the entire airflow channel of the heating smoking device is not an improvement point of the present invention and the existing layout form can be adopted, which will not be described in detail here.

[0069] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A heating structure for heating a smoking device, comprising: A heating element, comprising a heating end and a positioning end, wherein the heating end is inserted into the cigarette to heat the tobacco material in the cigarette; The base is a hollow columnar structure, the positioning end is installed in the opening in the middle of the base, the heating end extends out of the opening in the middle of the base, and the side of the positioning end away from the heating end forms an electrical connection with the outside world; The bracket is a hollow columnar structure, and the base is slidably installed in the opening in the middle of the bracket; as well as A flexible element is located between the base and the bracket, one end of the flexible element is mounted on the base, the other end of the flexible element is mounted on the bracket, and the flexible element deforms with temperature changes; Wherein, when the flexible element is deformed, the base and the heating element are pushed to rotate relative to the bracket, so that the heating end rotates relative to the cigarette, preventing the heating element from bonding to the tobacco material.

2. The heating structure according to claim 1, wherein: The flexible element is composed of a shape memory alloy having a two-way shape memory effect or at least two layers of metal sheets having different thermal expansion coefficients.

3. The heating structure according to claim 2, wherein: The thermal expansion coefficient of the metal close to the bracket side in the at least two layers of metal sheets is greater than the thermal expansion coefficient of the metal close to the base side.

4. The heating structure according to claim 1, wherein: The contact surface between the base and the bracket is respectively provided with a positioning groove recessed inwards, and the positioning groove on the base and the positioning groove on the bracket form a space for accommodating the flexible element.

5. The heating structure according to claim 4, wherein: A hole is respectively formed in the positioning groove on the base and the positioning groove on the bracket, and two ends of the flexible element are respectively fixed by the holes on the base and the holes on the bracket.

6. The heating structure according to claim 1, wherein: The heating element is made of a resistance material; The heating end is configured to be in a shape where a frustum portion is connected to a columnar portion, and the area of ​​the frustum portion away from the end surface of the columnar portion is smaller than the cross-sectional area of ​​the columnar portion, so as to facilitate the insertion of the heating end into the cigarette; The positioning end is configured to be in a shape that is compatible with the opening in the middle of the base.

7. A heated smoking device, comprising: The heating structure according to any one of claims 1 to 6; A control component, electrically connected to the positioning end of the heating element in the heating structure, and used to control the operation of the heating element; as well as The shell is used to accommodate the heating structure and the control assembly, and the bracket in the heating structure is installed on the shell.

8. The heating smoking article according to claim 7, wherein: The control component comprises: A power source, used to provide energy to the heating smoking device; A circuit board, used for controlling the operation of the heating smoking device, and electrically connected to the power source; and A wire is used to connect the positioning end of the heating element in the heating structure with the circuit board.

9. The heating smoking article according to claim 8, wherein: The conductive wire is made of a flexible material so that it can still maintain a good electrical connection with the circuit board when the heating element rotates.

10. The heating smoking article according to claim 7, wherein: A heating cavity for inserting the cigarette is formed in the housing; The heating end of the heating element in the heating structure extends from the opening in the middle of the base into the heating cavity; The friction force between the inner wall of the heating chamber and the cigarette is greater than the friction force between the heating end and the cigarette.

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