Heating smoking set capable of automatically detecting cigarette type
By setting a stress detection component at the inlet of the cigarette holder cavity, and using spring steel sheets and strain gauges to detect the hardness of the cigarette covering material, the problem of heated smoking devices being incompatible with different types of cigarettes is solved. This enables automatic identification and matching of heating curves, improving the smoking experience and compatibility.
Patent Information
- Application Number
- CN202422811812.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-19
AI Technical Summary
Existing heated smoking devices typically only work with one type of cigarette. Incompatible heating curves can significantly reduce the smoking experience and they are not compatible with different types of cigarettes, resulting in poor compatibility.
A stress detection component, including a spring steel sheet and a strain gauge, is installed at the entrance of the cigarette holder cavity. The hardness of the cigarette covering material is detected to distinguish between granular and non-granular cigarettes. The bending part of the spring steel sheet is designed with a gradually narrowing width structure, and the strain gauge is tightly fitted to the inner and outer walls to detect the deformation changes when the cigarette is inserted.
It enables automatic identification of cigarette types, ensures matching of heating curves, improves the compatibility of smoking devices and the smoking experience, and enhances the sensitivity and accuracy of detection.
Smart Images
Figure CN223473126U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heated non-combustible smoking devices, specifically to a heated smoking device that can automatically detect the type of cigarette. Background Art
[0002] Heated cigarettes, also known as heated tobacco or low-temperature cigarettes, are a type of product that combines heated tobacco products (HTPs) with a specially designed heating device. The HTP cigarette is heated to a certain temperature using a special heating device, and then it releases smoke for people to inhale.
[0003] In terms of heated smoking appliances, in order to match the release of cigarette smoke and take into account factors such as smoke stability and temperature control, heated smoking appliances can be mainly classified into resistance heating type, electromagnetic heating type, and airflow heating type based on the heating method.
[0004] Regarding HTP cigarettes, the mainstream HTP cigarettes currently consist mainly of a filler, cooling barrier, filter, and covering material. The filler is primarily divided into granular and non-granular types based on its shape. Cigarettes can also be categorized into granular and non-granular cigarettes based on the filler material. Different types of fillers are matched with covering materials of varying hardness. For example, granular fillers often use paper tubes as the covering material. Since the filling method for granular cigarettes involves filling the tobacco particles into this rigid paper tube, the paper tube must have sufficient hardness and rigidity to ensure smooth filling and prevent deformation. Non-granular cigarettes (such as shredded tobacco or sheet tobacco) use cigarette paper as the covering material. Traditional rolling processes are used to wrap the shredded or sheet tobacco particles inside the cigarette paper; therefore, the cigarette paper must be flexible to facilitate the rolling process.
[0005] Because particulate and non-particulate cigarettes differ significantly in structure and core shape, the required heating types and heating curves are also different. Therefore, in order to provide users with the best smoking experience, existing technologies mainly address the issue of large differences in heating curves by designing the smoking device as a dedicated device. That is, according to different types of cigarettes, the cigarette heater is designed to be perfectly matched with the characteristics of the cigarette. The advantage of setting up a dedicated smoking device is that the cigarette heater has a dedicated heating program. When heating cigarettes with it, the heated cigarettes can release a preset smoke quality and amount of smoke, allowing consumers to have a better smoking experience. However, if consumers want to smoke another type of heated cigarette, they must use a dedicated cigarette heater corresponding to that other cigarette type. This undoubtedly reduces the compatibility of the smoking device. Forcing the use of a certain type of heated smoking device to smoke another type of cigarette will significantly reduce the consumer's smoking experience due to the incompatible heating curve. Therefore, it is necessary for a smoking device to be compatible with all types of cigarettes and to be able to identify the cigarette type and select the heating program that matches that cigarette type. The first priority is to identify the cigarette type.
[0006] To address the above problems, this utility model is proposed. Utility Model Content
[0007] To address the problem that traditional cigarette heaters can only provide the optimal heating program for one type of cigarette, the purpose of this invention is to provide a heated cigarette device that can automatically identify the type of cigarette, whether it is particulate or non-particulate, thus opening up a new path for heated cigarette devices to be compatible with multiple types of cigarettes.
[0008] At least one stress detection component is provided at the inlet of the cigarette holder cavity of the heated smoking device. The stress detection component includes at least a partially bent spring steel sheet and a strain gauge. The strain gauge includes a first strain gauge that is closely attached to the inner wall of the middle section of the bent section of the spring steel sheet and / or a second strain gauge that is closely attached to the outer wall of the middle section of the bent section of the spring steel sheet. One end of the spring steel sheet is connected to the main body of the smoking device, and the outer edge of the other end protrudes inward at least partially from the inner wall of the cigarette holder cavity.
[0009] The optimal number of stress detection components installed at the inlet of the cigarette receiving cavity is two or more. When the number of stress detection components is two or more, the stress detection components are optimally distributed equidistantly along the circumference of the inlet of the cigarette receiving cavity. This ensures that the central axis of the cigarette A always coincides with the central axis of the receiving cavity during the insertion of the cigarette A into the cigarette receiving cavity. This facilitates use and also ensures that the test results are more representative.
[0010] Preferably, the bending section of the spring steel sheet (181) has a gradually narrowing width from the two initial bending ends to the middle.
[0011] Preferably, the spring steel sheet is "Ω" shaped, comprising a straight section and a curved section. The straight section has a uniform width structure, and the curved section has a gradually narrowing width structure from the two initial curved ends to the middle. The width of the straight section is greater than or equal to the width of the two initial curved ends of the curved section.
[0012] Preferably, the middle part of the bent portion of the spring steel sheet has a uniform width structure, and the width of the bent portion gradually narrows from the two starting bending ends to the two ends of the middle part of the bent portion.
[0013] It should be noted that, optimally, the maximum width of both the first and second strain gauges should not exceed the width of the middle section of the bent segment of the spring steel sheet. In addition, while ensuring that the first and second strain gauges are in close contact with the inner and outer surfaces of the spring steel sheet, their lengths can be as short as possible, but optimally, they should not be shorter than two-thirds of the length of the middle section of the spring steel sheet. This can significantly improve the detection sensitivity of the strain gauges.
[0014] Preferably, the free end of the spring steel sheet is further provided with a roller, and the outermost edge of the roller protrudes inward at least partially from the inner wall of the cigarette holder cavity.
[0015] Preferably, the inner diameter of the cigarette holder cavity is adapted to the outer diameter of the cigarette.
[0016] Preferably, the distance from the free end of the spring steel sheet or the outermost edge of the roller connected to the free end of the spring steel sheet to the inner wall of the cigarette holder cavity is 0.1-0.8 mm.
[0017] Preferably, the main body of the smoking device includes at least a shell, a control board, and a power supply, wherein the control board and the power supply are disposed inside the shell.
[0018] A convenient method for identifying cigarette types is provided, using the heated smoking device described in the first aspect, the method comprising:
[0019] When cigarette A is inserted into the cigarette receiving cavity, during the sliding contact between the covering material at the inserted end of the cigarette and the free end of the spring steel sheet, the free end of the spring steel sheet applies a radially inward force to the cigarette.
[0020] When the cigarette wrapping material is a rigid material, the free end of the spring steel sheet moves away from the cigarette receiving cavity, the bent part of the "Ω"-shaped spring steel sheet is compressed, and as the bent part of the spring steel sheet deforms, the first strain gauge is squeezed and / or the second strain gauge is stretched, the resistance of the strain gauge changes, and the control board determines that the cigarette is a particulate cigarette based on this signal.
[0021] When the cigarette covering material is a soft material, local deformation occurs in cigarette A, while the bent part of the "Ω"-shaped spring steel sheet does not deform, and the resistance of the strain gauge does not change. The control board determines that the cigarette is a non-particulate cigarette based on this signal.
[0022] In this method, the optimal configuration is to set the spring steel sheet in an "Ω" shape, with the width of the straight portion of the "Ω"-shaped spring steel sheet being greater than or equal to the width of the two initial bending ends of the bending portion. Furthermore, the width of the bending portion should gradually narrow from the two initial bending ends to the middle of the bending portion. Ideally, the middle of the bending portion should also be of uniform width. Simultaneously, the first and second strain gauges should be tightly fitted to the middle of the bending portion. Thus, when the free end of the spring steel sheet is subjected to the force of the cigarette wrapping material, the deformation of the spring steel sheet will concentrate at the narrowest point, i.e., the middle of the bending portion. This causes the first strain gauge, which is tightly fitted to the inner wall of the bending portion, to be compressed, resulting in a decrease in internal resistance, and / or the second strain gauge, which is tightly fitted to the outer wall of the bending portion, to be stretched, resulting in an increase in internal resistance. The controller senses this through the bridge circuit formed by the strain gauges and ultimately detects the cigarette type.
[0023] Strain gauges, also known as metal resistance strain gauges, operate on the principle of resistance strain effect. This means that when the metal wire within the strain gauge is subjected to stress, its resistance changes accordingly with the magnitude of the mechanical deformation (tension or compression). The theoretical formula for the resistance strain effect is as follows:
[0024] R = ρ * (L / S)
[0025] Where: ρ—resistivity (Ω·m)
[0026] L - Length of the metal wire (m)
[0027] S-Cross-sectional area of metal wire (mm²) 2 )
[0028] As can be seen from the above formula, during the process of mechanical deformation of a metal wire under stress, ρ, L, and S will all change, which will inevitably cause a change in the resistance value of the metal wire.
[0029] When subjected to external stretching, the length increases, the cross-sectional area decreases, and the resistance increases.
[0030] When compressed by pressure, the length decreases, the cross-sectional area increases, and the resistance decreases.
[0031] Compared with the prior art, the present invention has the following beneficial effects:
[0032] 1. This utility model proposes for the first time to set a stress detection component at the entrance of the cigarette holder cavity to detect the hardness of the cigarette covering material, and further determine whether the cigarette is a particulate cigarette or a non-particulate cigarette.
[0033] 2. In the preferred technical solution, the stress detection component is set at the entrance of the cigarette receiving cavity, which avoids the influence of the support section and cooling section of the cigarette on the deformation of the stress detection component, and effectively ensures that the stress detection component can accurately deform or not deform according to the hardness of the covering material.
[0034] 3. In the preferred technical solution, the distance between the outermost edge of the free end of the spring steel sheet (or the outermost edge of the roller) and the inner wall of the cigarette receiving cavity is set to 0.1-0.8mm. This fully considers that when the outer wall of the cigarette contacts the free end of the spring steel sheet, the force exerted by the outer wall of the cigarette on the free end of the spring steel sheet (or the roller) can cause deformation of the bent part of the spring steel sheet, but will not affect the appearance of the cigarette.
[0035] 4. In the preferred technical solution, both the bending section of the spring steel sheet and the stress plate are configured with a gradually narrowing width from both ends to the middle. It is strictly required that the stress plate is tightly attached to the inner or outer wall of the middle of the bending section of the spring steel sheet. Under this premise, when the free end of the bending section of the spring steel sheet is subjected to the force of the cigarette covering material, the middle of the bending section and the middle of the stress plate will undergo significant deformation. Furthermore, the internal resistance of the stress plate will change significantly, so that the controller can receive the resistance change. This structure effectively ensures the sensitivity of the stress plate detection.
[0036] 5. As a preferred option, the middle part of the bent section of the spring steel sheet has a uniform width structure, and the two starting ends of the bent section of the spring steel sheet have a gradually narrowing width structure from the two ends to the middle of the bent section. This can further improve the sensitivity of stress sheet detection. Attached Figure Description
[0037] Figure 1 This is a schematic diagram of the longitudinal cross-sectional structure of the heated smoking device in Example 1, wherein a pair of stress detection components are symmetrically arranged at the inlet of the smoking chamber;
[0038] Figure 2 This is a schematic diagram of the stress detection component structure;
[0039] Figure 3 These are diagrams showing the working state of the stress detection component. Diagram a shows the state of the stress detection component when it is in contact with the soft cigarette covering material, and diagram b shows the state of the stress detection component when it is in contact with the hard cigarette covering material.
[0040] List of reference numerals in the attached diagram:
[0041] 1-Cigarette holder cavity, 13-Housing shell, 14-Control main board, 15-Power supply, 18-Stress detection assembly, 181-Spring steel sheet, 1811-Straight section, 1812-Bending section, 19-Strain gauge, 191-First strain gauge, 192-Second strain gauge, A-Cigarette. DETAILED DESCRIPTION
[0042] The present invention will be further described below through specific embodiments.
[0043] Example 1
[0044] like Figure 1 , 2 As shown, a heated smoking device capable of automatically identifying the type of cigarette is provided. Two stress detection components 18 are symmetrically arranged at the entrance of the cigarette receiving cavity 1 of the heated smoking device. Each stress detection component 18 includes a spring steel sheet 181 and a strain gauge 19. Specifically, the spring steel sheet 181 is generally "Ω" shaped, including a straight part 1811 and a curved part 1812. The straight part 1811 of the spring steel sheet has a constant width structure, and the curved part 1812 has a gradually narrowing width structure from the two starting ends to the two ends in the middle of the curved part. The middle part of the curved part has a constant width structure. Specifically, the width of the middle part of the curved part is equal to the width of the two ends in the middle of the curved part (not shown in the figure).
[0045] The strain gauges include a first strain gauge 191 that is tightly fitted to the inner wall of the middle part of the bend (not shown in the figure) and a second strain gauge 192 that is tightly fitted to the outer wall of the middle part of the bend of the spring steel sheet 181 (not shown in the figure), wherein the first strain gauge 191 and the second strain gauge 192 are of the same length and width as the middle part of the bend of the spring steel sheet 181.
[0046] One end of the spring steel sheet 181 is connected to the main body of the smoking device, and the other end is provided with a roller 411. The outermost edge of the roller 411 protrudes inward from the inner wall of the cigarette receiving cavity 1. Specifically, the distance from the outermost edge of the roller 411 to the inner wall of the cigarette receiving cavity 1 is 0.5mm.
[0047] The inner diameter of the cigarette receiving cavity 1 is adapted to the outer diameter of the cigarette A.
[0048] The main body of the smoking device also includes a housing 13, a control board 14, and a power supply 15. The control board 14 and the power supply 15 are located inside the housing 13 and are located on the same side of the cigarette holder cavity 1.
[0049] Example 2
[0050] In this embodiment, cigarette A is a non-particulate cigarette.
[0051] like Figure 3 As shown in Figure a, a method for identifying the type of cigarette is provided, using the heated smoking device described in Example 1, the method comprising:
[0052] When cigarette A is inserted into cigarette receiving cavity 1, during the sliding contact between the covering material at the insertion end of the cigarette and the free end of spring steel sheet 181, the free end of spring steel sheet 181 applies a radial inward force to the cigarette. At this time, because the covering material of the cigarette is a soft material, cigarette A undergoes local deformation, while the bent part 1812 of the “Ω”-shaped spring steel sheet 181 does not deform, and the first strain gauge 191 and the second strain gauge 192 do not change. The control board determines that the cigarette is a non-particulate cigarette based on this signal.
[0053] Example 3
[0054] In this embodiment, cigarette A is a granular cigarette.
[0055] like Figure 3 As shown in Figure b, a method for identifying the type of cigarette is provided, using the heated smoking device described in Example 1, the method comprising:
[0056] When cigarette A is inserted into cigarette receiving cavity 1, during the sliding contact between the covering material at the insertion end of the cigarette and the free end of spring steel sheet 181, the free end of spring steel sheet 181 applies a radially inward force to the cigarette. At this time, because the covering material is a rigid material, the free end of spring steel sheet 181 moves away from the cigarette receiving cavity, and the bent portion 1812 of the "Ω"-shaped spring steel sheet 181 is compressed. The bent portion 1812 of spring steel sheet 181 deforms, the first strain gauge 191 is squeezed and the second strain gauge 192 is stretched. The resistance of the first strain gauge 191 decreases and the resistance of the second strain gauge 192 increases. The control board determines that the cigarette is a particulate cigarette based on this signal.
[0057] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A heated smoking device capable of automatically identifying the type of cigarette, characterized in that, At least one stress detection component (18) is provided at the entrance of the cigarette holder cavity (1) of the heated smoking device. The stress detection component (18) includes a spring steel sheet (181) with a bent portion (1812) and a strain gauge (19). The strain gauge (19) includes a first strain gauge (191) that is tightly attached to the inner wall of the middle part of the bent section of the spring steel sheet (181) and / or a second strain gauge (192) that is tightly attached to the outer wall of the middle part of the bent section of the spring steel sheet (181). One end of the spring steel sheet (181) is connected to the main body of the smoking device, and the outer edge of the other end protrudes inward at least partially from the inner wall of the cigarette holder cavity (1).
2. A heated smoking device capable of automatically identifying the type of cigarette as described in claim 1, characterized in that, The bending section of the spring steel sheet (181) has a gradually narrowing width from the two initial bending ends to the middle.
3. A heated smoking device capable of automatically identifying the type of cigarette as described in claim 1, characterized in that, The spring steel sheet (181) is "Ω" shaped, including a straight part (1811) and a curved part (1812). The straight part (1811) has a constant width structure, and the curved part (1812) has a gradually narrowing width structure from the two starting curved ends to the middle. The width of the straight part (1811) is greater than or equal to the width of the two starting curved ends of the curved part (1812).
4. A heated smoking device capable of automatically identifying the type of cigarette as described in claim 3, characterized in that, The middle part of the bent portion (1812) of the spring steel sheet (181) has a uniform width structure, and the two starting bending ends of the bent portion (1812) to the two ends of the middle part of the bent portion have a gradually narrowing width structure.
5. A heated smoking device capable of automatically identifying the type of cigarette as described in claim 1, characterized in that, The free end of the spring steel sheet (181) is also provided with a roller (411), and the outermost edge of the roller (411) protrudes inward at least partially from the inner wall of the cigarette holder cavity (1).
6. A heated smoking device capable of automatically identifying the type of cigarette as described in claim 1, characterized in that, The inner diameter of the cigarette holder cavity (1) is adapted to the outer diameter of the cigarette (A).
7. A heated smoking device capable of automatically identifying the type of cigarette as described in claim 1, characterized in that, The distance from the free end of the spring steel sheet (181) or the outermost edge of the roller (411) connected to the free end of the spring steel sheet (181) to the inner wall of the cigarette holder cavity (1) is 0.1-0.8 mm.
8. A heated smoking device capable of automatically identifying the type of cigarette as described in claim 1, characterized in that, The main body of the smoking device includes at least a housing (13), a control board (14) and a power supply (15), wherein the control board (14) and the power supply (15) are disposed inside the housing (13).