Cigarette capable of adjusting ventilation quantity as well as preparation method and use method thereof

Abstract

The invention belongs to the technical field of cigarettes, and particularly relates to a cigarette capable of adjusting the ventilation quantity and a preparation method and a using method thereof. The cigarette comprises a tobacco shred section (1), a filtering section (4) and a ventilation adjusting section (2) which are arranged from upstream to downstream. The ventilation adjusting section (2) comprises an outer pipe (2-2) and an inner rod (2-1) located in the outer pipe (2-2). The outer pipe (2-2) comprises an upstream outer pipe section (2-2-2) located on the upstream and a downstream outer pipe section (2-2-1) located on the downstream. An upstream ventilation groove (2-2-3) extending in the axial direction is formed in the inner wall of the upstream outer pipe section (2-2-2). The inner wall of the downstream outer pipe section (2-2-1) is provided with downstream ventilation grooves (2-2-4) extending in the axial direction. And after the downstream outer pipe section (2-2-1) is rotated, the downstream ventilation groove (2-2-4) can be located at a first position communicating with the upstream ventilation groove (2-2-3) and a second position not communicating with the upstream ventilation groove (2-2-3), so that the ventilation quantity is adjusted.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of cigarettes, and particularly relates to a cigarette capable of adjusting ventilation volume and a preparation method and use method thereof. BACKGROUND

[0002] Cigarettes generally change the ventilation volume of the cigarettes by means of punching holes on the outer wall of the filter segment or changing the filter structure. One of the core requirements of cigarettes is that the smoke concentration is adjustable - users have different requirements for the irritability and concentration of smoke in different scenarios such as initial use and long-term use. However, in the prior art, the ventilation structure of the cigarette is mostly of a fixed type, the size and position of the ventilation hole are fixed, and the ventilation volume cannot be adjusted in real time, resulting in a single smoke concentration: when the concentration is too high, the irritability is strong, which easily causes discomfort; and when the concentration is too low, the experience is insufficient.

[0003] In order to solve the above problems, the present application is proposed. SUMMARY

[0004] In the present application, the flow direction of the smoke in the cigarette during smoking is recorded as from upstream to downstream.

[0005] The first aspect of the present application provides a cigarette capable of adjusting ventilation volume, comprising: a tobacco segment 1, a filter segment 4, and a ventilation adjusting segment 2 arranged from upstream to downstream.

[0006] The ventilation adjusting segment 2 comprises: an outer tube 2-2 and an inner rod 2-1 located in the outer tube 2-2.

[0007] The outer tube 2-2 comprises an upstream outer tube segment 2-2-2 located upstream and a downstream outer tube segment 2-2-1 located downstream.

[0008] The inner wall of the upstream outer tube segment 2-2-2 is provided with an axially extending upstream ventilation groove 2-2-3.

[0009] The inner wall of the downstream outer tube segment 2-2-1 is provided with an axially extending downstream ventilation groove 2-2-4.

[0010] The upstream ventilation groove 2-2-3 and the downstream ventilation groove 2-2-4 are configured to:

[0011] After rotating the downstream outer tube segment 2-2-1, the downstream ventilation groove 2-2-4 can be located at a first position in communication with the upstream ventilation groove 2-2-3 and a second position not in communication with the upstream ventilation groove 2-2-3, so as to realize adjustment of the ventilation volume.

[0012] When the downstream outer tube segment 2-2-1 is rotated, the inner rod 2-1 is rotated as the shaft, that is, the inner rod 2-1 does not rotate.

[0013] Preferably, the cigarette further comprises a tipping paper layer 2-3 wrapping the outer tube 2-2;

[0014] The tipping paper layer 2-3 comprises an upstream tipping paper layer wrapping the upstream outer tube segment 2-2-2 and a downstream tipping paper layer wrapping the downstream outer tube segment 2-2-1.

[0015] An adhesive layer is arranged between the tipping paper layer 2-3 and the outer tube 2-2, so that when the downstream tipping paper layer is rotated, the downstream outer tube segment 2-2-1 is rotated while the silica gel rod 2-1 is not rotated.

[0016] Preferably, the cigarette further comprises a tipping paper layer 3 wrapping the tobacco segment 1, the filter segment 4 and the ventilation adjustment segment 2, and the tipping paper layer 3 has a ring-shaped weak connection line 3-1 thereon, which is located between the upstream tipping paper and the downstream tipping paper in the axial direction and coincides with the intersection line of the upstream tipping paper and the downstream tipping paper.

[0017] An adhesive layer is arranged between the tipping paper layer 3 and the tipping paper layer 2-3.

[0018] Preferably, the adhesive layer is a widened glue line.

[0019] Preferably, the inner rod 2-1 is a solid rod or a hollow rod, such as a fiber bundle or a silica gel rod.

[0020] When the inner rod 2-1 is a fiber bundle, it can play a role in filtering smoke.

[0021] When the inner rod 2-1 is a silica gel rod, the silica gel rod as a whole is relatively smooth, which can make the sliding of the outer tube 5 easier.

[0022] When the inner rod 2-1 is a silica gel rod, the inner rod 2-1 can be a porous rod or a hollow rod, and the porous rod or the hollow rod can be loaded with flavor to release aroma under the action of heat of smoke.

[0023] When the inner rod 2-1 is a silica gel rod, the combination of the outer tube 2-2 and the inner rod 2-1 can be: injection molding to obtain the inner rod 2-1; then wrapping the inner rod 2-1 with a fiber bundle, and using a mold to hot-press to obtain the inner rod 2-1 wrapped with the fiber bundle outer tube 2-2. During the molding process, the inner wall of the fiber bundle outer tube 2-2 obtains ventilation grooves.

[0024] Preferably, the outer tube 2-2 is a fiber bundle tube. When the outer tube 2-2 is a fiber bundle tube, it can play a role in filtering smoke.

[0025] Preferably, the inner rod 2-1 is made of a fiber bundle or a silica gel material.

[0026] The second aspect of this application provides a method for preparing the cigarette with adjustable ventilation volume as described in the first aspect, the method comprising the following steps:

[0027] 1. An outer tube 2-2 and an inner rod 2-1 located inside the outer tube 2-2 are obtained using a molding process. An axially extending ventilation groove is provided on the inner wall of the outer tube 2-2.

[0028] 2. Apply an adhesive layer to the outer periphery of the outer tube 2-2, and wrap the forming paper layer 2-3 around the outer periphery of the outer tube 2-2 to obtain the initial ventilation adjustment section;

[0029] 3. Cut the initial ventilation adjustment section from the middle of the forming paper layer 2-3 to the outer tube 2-2 without cutting the inner rod 2-1. Then the outer tube 2-2 is cut into the upstream outer tube section 2-2-2 and the downstream outer tube section 2-2-1, and the ventilation slot is cut into the upstream ventilation slot 2-2-3 and the downstream ventilation slot 2-2-4, thus obtaining the ventilation adjustment section 2 as a whole.

[0030] 4. After coating the outer periphery of the ventilation adjustment section 2 in step 3 with an adhesive layer, roll it together with the filter section 4 and the tobacco section 1 with pre-perforated tipping paper to form a cigarette. The pre-perforated tipping paper forms tipping paper layer 3.

[0031] The pre-perforated tipping paper has a pre-perforated weak connecting line 3-1. When winding, the weak connecting line 3-1 covers the circumferential cut position of the ventilation adjustment section 2, so that the weak connecting line 3-1 can be broken by rotating the upstream outer tube section 2-2-2 of the cigarette, and the upstream outer tube section 2-2-2 and the upstream forming paper layer and tipping paper layer 3 wrapped around it will rotate accordingly.

[0032] The term "circumferential cut from the middle of forming paper layer 2-3" refers to the approximate middle position on forming paper layer 2-3, not precisely the middle; it could also be a position slightly upstream or downstream.

[0033] Preferably, the circumferential cutting position is 8-16 mm from the downstream end of the initial ventilation adjustment section to ensure a sufficiently large rotation area. At this time, the weak connecting line 3-1 is also 8-16 mm from the downstream end of the initial ventilation adjustment section.

[0034] Preferably, the adhesive layer is a widened adhesive line.

[0035] The third aspect of this application provides a method for using the cigarette with adjustable ventilation volume as described in the first aspect. When it is necessary to adjust the ventilation volume of the cigarette, hold the upstream outer pipe section 2-2-2 still and rotate the downstream outer pipe section 2-2-1 so that the downstream ventilation slot 2-2-4 is located in a first position connected to the upstream ventilation slot 2-2-3, a second position not connected to the upstream ventilation slot 2-2-3, or a position between the first and second positions, so as to achieve the adjustment of ventilation volume.

[0036] Preferably, the ventilation volume can be adjusted during the interval between smoking a cigarette, or before smoking a cigarette begins.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. This application provides a rotatable cigarette holder for the first time. By rotating the downstream outer pipe section 2-2-1 of the ventilation adjustment section 2, the downstream ventilation slot 2-2-4 can be positioned in a first position connected to the upstream ventilation slot 2-2-3 and in a second position not connected to the upstream ventilation slot 2-2-3, so as to adjust the ventilation volume.

[0039] 2. Both the outer pipe 2-2 and the inner rod 2-1 of the ventilation regulating section 2 can be made of cellulose acetate, which can further filter the flue gas.

[0040] 3. The inner rod 2-1 of the ventilation regulating section 2 can also be a silicone rod. Currently, many cigarette products use silicone rods with through holes as lip filters. The advantage is that the silicone rod does not turn yellow after inhalation, giving consumers the feeling that the smoke is very clean. However, its disadvantage is poor filtration efficiency and high smoke irritation. In the preferred technical solution, the ventilation regulating section 2 of this application uses silicone as the inner core and cellulose acetate as the outer tube, and the ventilation regulating section 2 can be used as a lip filter. At this time, the ventilation regulating section 2 can combine the advantages of both rods, which not only filters the smoke, but also does not show obvious yellowing after inhalation, giving consumers the psychological feeling of inhaling clean smoke. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the cigarette structure of this application.

[0042] Figure 2 This is a schematic diagram of the ventilation regulating section 2. The downstream ventilation slot 2-2-4 is located at the first position that is connected to the upstream ventilation slot 2-2-3.

[0043] Figure 3 The diagram shows the structure of ventilation regulating section 2. The downstream ventilation slot 2-2-4 is located in a second position that is not connected to the upstream ventilation slot 2-2-3.

[0044] Figure 4 for Figure 2 After rotating the downstream outer pipe section 2-2-1 clockwise, until... Figure 3 A schematic diagram of the state.

[0045] Figure 5 This is a schematic diagram of the weak connection line 3-1 on the cork paper layer 3.

[0046] List of reference numerals in the attached diagram:

[0047] 1. Tobacco section; 2. Ventilation adjustment section; 2-1. Inner rod; 2-2. Outer pipe; 2-2-1. Downstream outer pipe section; 2-2-2. Upstream outer pipe section; 2-2-3. Upstream ventilation slot; 2-2-4. Downstream ventilation slot; 2-3. Forming paper layer; 3. Water-filled paper layer; 3-1. Weak connection line; 4. Filter section. Detailed Implementation

[0048] The present application will now be described in further detail with reference to the embodiments.

[0049] Those skilled in the art will understand that the following embodiments are for illustrative purposes only and should not be construed as limiting the scope of this application. Where specific techniques or conditions are not specified in the embodiments, they are performed in accordance with the techniques or conditions described in the literature in the field or according to the product manual. Materials or equipment whose manufacturers are not specified are all conventional products that can be obtained by purchase.

[0050] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. In the description of this application, unless otherwise stated, “a plurality” means two or more. It should be further understood that the term “comprising” as used in the specification of this application means the presence of the stated feature, integer, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” to another element, it can be directly connected to the other element, or there may be an intermediate element. Furthermore, the term “connected” as used herein can include wireless connections.

[0051] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0053] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0054] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0056] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the meaning consistent with their meaning in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein.

[0057] The first aspect of this application provides a cigarette holder capable of adjusting ventilation volume, the cigarette holder comprising: a tobacco section 1, a filter section 4, and a ventilation adjustment section 2 arranged from upstream to downstream;

[0058] Filter section 4 is a solid cellulose acetate bundle tube, which serves to filter flue gas.

[0059] The ventilation regulating section 2 includes: an outer pipe 2-2 and an inner rod 2-1 located inside the outer pipe 2-2;

[0060] The outer pipe 2-2 includes an upstream outer pipe section 2-2-2 located upstream and a downstream outer pipe section 2-2-1 located downstream;

[0061] The inner wall of the upstream outer pipe section 2-2-2 is provided with an axially extending upstream ventilation groove 2-2-3;

[0062] The inner wall of the downstream outer pipe section 2-2-1 is provided with an axially extending downstream ventilation slot 2-2-4;

[0063] After rotating the downstream outer pipe section 2-2-1, the downstream ventilation slot 2-2-4 can be positioned in a first position connected to the upstream ventilation slot 2-2-3 and in a second position not connected to the upstream ventilation slot 2-2-3, so as to adjust the ventilation volume.

[0064] Preferably, the cigarette further includes: a formed paper layer 2-3 that wraps around the outer tube 2-2;

[0065] The forming paper layer 2-3 includes: an upstream forming paper layer that wraps the upstream outer tube segment 2-2-2 and a downstream forming paper layer that wraps the downstream outer tube segment 2-2-1;

[0066] An adhesive layer is provided between the forming paper layer 2-3 and the outer tube 2-2, so that when the downstream forming paper layer is rotated, the downstream outer tube section 2-2-1 rotates while the silicone rod 2-1 does not rotate.

[0067] Preferably, the cigarette also includes a cork paper layer 3 that wraps the tobacco section 1, the filter section 4, and the ventilation regulating section 2.

[0068] The cork paper layer 3 has an annular weak connecting line 3-1, which is located between the upstream forming paper and the downstream forming paper in the axial direction.

[0069] Preferably, the inner rod 2-1 is a solid rod or a hollow rod, such as fiber bundles or silicone rods.

[0070] When the inner rod 2-1 is a fiber bundle, it can filter the flue gas.

[0071] When the inner rod 2-1 is a silicone rod, the outer tube 2-2 can slide more easily because the silicone rod is relatively smooth.

[0072] Preferably, the outer tube 2-2 is a fiber bundle tube. When the outer tube 2-2 is a fiber bundle tube, it can further filter the flue gas.

[0073] The second aspect of this application provides a method for preparing the cigarette with adjustable ventilation volume as described in the first aspect, the method comprising the following steps:

[0074] 1. An outer tube 2-2 and an inner rod 2-1 located inside the outer tube 2-2 are obtained using a molding process. An axially extending ventilation groove is provided on the inner wall of the outer tube 2-2.

[0075] 2. Wrap the formed paper layer 2-3 around the outer tube 2-2 to obtain the initial ventilation adjustment section;

[0076] 3. Cut the initial ventilation adjustment section from the middle of the forming paper layer 2-3 to the outer tube 2-2 without cutting the inner rod 2-1. Then the outer tube 2-2 is cut into the upstream outer tube section 2-2-2 and the downstream outer tube section 2-2-1, and the ventilation slot is cut into the upstream ventilation slot 2-2-3 and the downstream ventilation slot 2-2-4, thus obtaining the ventilation adjustment section 2 as a whole.

[0077] 4. The ventilation adjustment section 2, filter section 4, and tobacco section 1 from step 3 are rolled together with pre-perforated tipping paper to form a cigarette.

[0078] The pre-perforated tipping paper has a pre-perforated weak connecting line 3-1. When winding, the weak connecting line 3-1 covers the circumferential cut position of the ventilation adjustment section 2, so that the weak connecting line 3-1 can be broken by rotating the upstream outer tube section 2-2-2 of the cigarette, and the upstream outer tube section 2-2-2 and the upstream forming paper layer and tipping paper layer wrapped around it will rotate accordingly.

[0079] The third aspect of this application provides a method for using the cigarette with adjustable ventilation volume as described in the first aspect. When it is necessary to adjust the ventilation volume of the cigarette, hold the upstream outer pipe section 2-2-2 located downstream and keep it stationary, rotate the downstream outer pipe section 2-2-1, so that the downstream ventilation slot 2-2-4 is located in a first position connected to the upstream ventilation slot 2-2-3, in a second position not connected to the upstream ventilation slot 2-2-3, or in a position between the first and second positions, so as to achieve the adjustment of ventilation volume.

[0080] Preferably, the tipping paper layer 3 can be tipping paper with a specific pattern so that the position of the upstream outer pipe section 2-2-2 can be easily seen.

[0081] For example, when the downstream ventilation slot 2-2-4 is located in the first position connected to the upstream ventilation slot 2-2-3, the specific pattern of the cork paper layer 3 is in the first state.

[0082] When the downstream ventilation slot 2-2-4 is located in the first position and is not connected to the upstream ventilation slot 2-2-3, the specific pattern of the cork paper layer 3 changes due to the change in the position of the part of the pattern at the downstream outer pipe section 2-2-1, resulting in the specific pattern being in the second state.

[0083] The following embodiments are provided to further illustrate this application.

[0084] Example 1: The inner rod of the cigarette is a solid cellulose acetate bundle rod, and the outer tube is a hollow cellulose acetate bundle rod.

[0085] 1. Structure of each component of the cigarette:

[0086] Tobacco Segment 1: A 60mm long bundle of tobacco shreds wrapped in forming paper.

[0087] Inner rod 2-1: A solid cellulose acetate bundle rod with a length of 20mm and a diameter of 3.6mm.

[0088] Outer tube 2-2: Hollow cellulose acetate bundle rod with a length of 20mm, an inner diameter of 3.7mm, and an outer diameter of 7.7mm. Two symmetrical ventilation slots are axially opened on the inner wall, with a width of 1mm and a depth of 0.5mm.

[0089] Forming paper layer 2-3: Forming paper with an air permeability of 20 CU.

[0090] 3rd layer of tipping paper: Tipping paper.

[0091] Filter section 4: 10mm in length, solid cellulose acetate bundle rod, wrapped in forming paper.

[0092] 2. Cigarette preparation steps:

[0093] Step 1: Using cellulose acetate bundles as raw materials, the bundles are opened and dispersed, and a solid cellulose acetate bundle rod (inner rod 2-1) and a hollow cellulose acetate bundle rod with ventilation grooves (outer rod 2-2) are obtained by hot pressing using a mold. Then, the outer wall of the hollow cellulose acetate bundle rod is wrapped with forming paper, and the overlap of the forming paper is bonded with arabic to obtain the initial ventilation adjustment section of the outer forming paper layer 2-3.

[0094] Step 2: Using a disc cutter, cut the initial ventilation adjustment section from the middle of the forming paper layer 2-3 to the outer tube 2-2 without cutting the inner rod 2-1. The circumferential cutting thickness is fixed at 2mm. During the circumferential cutting, keep the initial ventilation adjustment section fixed and move the disc cutter along the predetermined circumferential cutting path.

[0095] Step 3: The initial ventilation adjustment section, filter section 4 and tobacco section 1 after the ring cutting in Step 3 are rolled together with pre-perforated tipping paper to form a cigarette.

[0096] The pre-perforated tipping paper has a pre-perforated weak connecting line 3-1. When winding, the weak connecting line 3-1 covers the circumferential cut position of the initial ventilation adjustment section, so that the weak connecting line 3-1 can be twisted off by rotating the downstream outer tube section 2-2-1 of the cigarette, and the downstream outer tube section 2-2-1 and the upstream forming paper layer and tipping paper layer wrapped around it will rotate accordingly.

[0097] 3. Perform performance tests on the cigarettes obtained above:

[0098] The test included physical parameters of cigarette draw resistance and filter ventilation, as well as chemical parameters of tar, carbon monoxide, and nicotine in the cigarette smoke.

[0099] Light the cigarette, turn on the smoking machine to draw in the smoke, fix the upstream outer tube section 2-2-2 to prevent it from rotating, and test the three sets of cigarettes from Example 1 according to the methods of Application Examples 1-3.

[0100] Application Example 1: Before taking the first puff of the cigarette in Example 1, rotate the downstream outer pipe section 2-2-1 so that the downstream ventilation slot 2-2-4 is fully connected to the first position of the upstream ventilation slot 2-2-3. Then, perform a puffing test until the puffing is finished.

[0101] Application Example 2: Before taking the first puff of the cigarette in Example 1, rotate the downstream outer pipe section 2-2-1 so that the downstream ventilation slot 2-2-4 is completely offset from the upstream ventilation slot 2-2-3 in a second position. Then, perform a puff test until the puffing is finished.

[0102] Application Example 3: Before the first puff of the cigarette in Example 1, the downstream ventilation slot 2-2-4 is positioned between the first and second positions, such that the upstream ventilation slot 2-2-3 and the downstream ventilation slot 2-2-4 overlap by 50%. Then, a puffing test is performed until the puffing is finished.

[0103] The results of the above suction test are shown in Table 1.

[0104] Table 1

[0105]

[0106] As shown in Table 1, by rotating the downstream outer pipe section 2-2-1, the suction resistance of the flue gas and the ventilation rate of the filter can be adjusted. In addition, the content of tar, carbon monoxide and nicotine in the flue gas will also change accordingly.

Claims

1. A cigarette with adjustable ventilation volume, characterized in that, The cigarette includes: a tobacco section (1), a filter section (4), and a ventilation regulating section (2) arranged from upstream to downstream; The ventilation regulating section (2) includes: an outer pipe (2-2) and an inner rod (2-1) located inside the outer pipe (2-2); The outer pipe (2-2) includes an upstream outer pipe section (2-2-2) located upstream and a downstream outer pipe section (2-2-1) located downstream; The inner wall of the upstream outer pipe section (2-2-2) is provided with an axially extending upstream ventilation slot (2-2-3); The inner wall of the downstream outer pipe section (2-2-1) is provided with an axially extending downstream ventilation slot (2-2-4); The upstream ventilation slot (2-2-3) and the downstream ventilation slot (2-2-4) are configured as follows: After rotating the downstream outer pipe section (2-2-1), the downstream ventilation slot (2-2-4) can be positioned in a first position that is connected to the upstream ventilation slot (2-2-3) and a second position that is not connected to the upstream ventilation slot (2-2-3), so as to adjust the ventilation volume.

2. The cigarette with adjustable ventilation volume according to claim 1, characterized in that, The cigarette also includes: a shaped paper layer (2-3) that wraps the outer tube (2-2); The forming paper layer (2-3) includes: an upstream forming paper layer that wraps the upstream outer tube segment (2-2-2) and a downstream forming paper layer that wraps the downstream outer tube segment (2-2-1); An adhesive layer is provided between the forming paper layer (2-3) and the outer tube (2-2) so that when the downstream forming paper layer is rotated, the downstream outer tube section (2-2-1) rotates while the silicone rod (2-1) does not rotate.

3. The cigarette with adjustable ventilation volume according to claim 2, characterized in that, The cigarette also includes a cork paper layer (3) that wraps the tobacco section (1), the filter section (4) and the ventilation regulating section (2); The cork paper layer (3) has an annular weak connecting line (3-1), and in the axial direction, the weak connecting line (3-1) is located between the upstream forming paper and the downstream forming paper; An adhesive layer is provided between the cork paper layer (3) and the forming paper layer (2-3).

4. The cigarette with adjustable ventilation volume according to claim 1, characterized in that, The inner rod (2-1) is a solid rod or a hollow rod.

5. The cigarette with adjustable ventilation volume according to claim 1, characterized in that, The outer tube (2-2) is a fiber bundle tube; the inner rod (2-1) is made of fiber bundle or silicone material.

6. A method for preparing a cigarette with adjustable ventilation volume as described in claim 3, characterized in that, The preparation method includes the following steps: (1) An outer tube (2-2) and an inner rod (2-1) located inside the outer tube (2-2) are obtained by molding process. The inner wall of the outer tube (2-2) is provided with an axially extending ventilation groove. (2) Apply an adhesive layer to the outer periphery of the outer tube (2-2) and wrap the forming paper layer (2-3) around the outer periphery of the outer tube (2-2) to obtain the initial ventilation adjustment section; (3) Cut the initial ventilation adjustment section from the middle of the forming paper layer (2-3) to the outer tube (2-2) without cutting the inner rod (2-1) to obtain the ventilation adjustment section (2); (4) After coating the outer periphery of the ventilation regulating section (2) obtained in step (3) with an adhesive layer, roll it together with the filter section (4) and the tobacco section (1) with pre-perforated cork paper to form a cigarette. The pre-perforated tipping paper has a pre-perforated weak connecting line (3-1). When winding, the weak connecting line (3-1) covers the circumferential cut position of the ventilation adjustment section (2), so that the weak connecting line (3-1) can be twisted off by rotating the downstream outer tube section (2-2-1) of the cigarette and the downstream outer tube section (2-2-1) and the upstream forming paper layer and tipping paper layer (3) wrapped around it will rotate accordingly.

7. A method of using a cigarette with adjustable ventilation volume as described in any one of claims 1-5, characterized in that, When it is necessary to adjust the ventilation volume of the cigarette, hold the upstream outer pipe section (2-2-2) still and rotate the downstream outer pipe section (2-2-1) so that the downstream ventilation slot (2-2-4) is in a first position connected to the upstream ventilation slot (2-2-3), a second position not connected to the upstream ventilation slot (2-2-3), or a position between the first and second positions, so as to adjust the ventilation volume.

8. The method of use according to claim 7, characterized in that, Adjust the ventilation volume during the interval between cigarette puffs, or adjust the ventilation volume before starting to puff a cigarette.

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