Cigarette filter tip and cigarette

Abstract

The utility model relates to a cigarette filter tip and a cigarette, the cigarette filter tip comprises a first filter section and a second filter section, the first filter section is configured to filter smoke; the second filtering section is connected with the first filtering section, the second filtering section is provided with a gas conveying channel used for conveying flue gas, the gas conveying channel is provided with a first channel opening and a second channel opening which are communicated with each other, the second filtering section can be switched between a first state and a second state, and in the first state, the gas conveying channel is communicated with the second channel opening; in the first state, the first channel opening is located at one end, close to the first filtering section, of the second filtering section, the second channel opening is located at one end, away from the first filtering section, of the second filtering section, and in the second state, the first channel opening is located at one end, away from the first filtering section, of the second filtering section, and the second channel opening is located at one end, close to the first filtering section, of the second filtering section. The flow resistance of the gas transmission channel from the first channel opening to the second channel opening is smaller than the flow resistance of the gas transmission channel from the second channel opening to the first channel opening. The cigarette comprises a cigarette filter tip.

Description

Technical Field

[0001] The utility model relates to the field of tobacco, in particular to a cigarette filter and a cigarette. Background Art

[0002] In the tobacco products industry, the flow of smoke within tobacco products, such as cigarettes, is crucial to product quality. Traditional cigarette design typically focuses on the selection and optimization of tobacco blends, while ignoring the dynamic changes in smoke during combustion and its impact on the end-user experience.

[0003] As consumers' requirements for cigarette quality continue to increase, improving smoke flow and enhancing the sensory smoking experience of cigarettes has become a new research direction in the industry.

[0004] It should be noted that the information disclosed in the background technology section of the present invention is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or suggestion in any form that the information constitutes prior art already known to those skilled in the art. Utility Model Content

[0005] The utility model provides a cigarette filter and a cigarette, which can adjust the flow state of smoke and improve user experience.

[0006] According to one aspect of the present invention, there is provided a cigarette filter, comprising:

[0007] a first filter segment configured to filter smoke; and

[0008] The second filter segment is connected to the first filter segment. The second filter segment is provided with a gas transmission channel for transmitting smoke. The gas transmission channel has a first channel opening and a second channel opening that are interconnected. The second filter segment can switch between a first state and a second state.

[0009] In the first state, the first channel opening is located at an end of the second filter segment close to the first filter segment, and the second channel opening is located at an end of the second filter segment away from the first filter segment.

[0010] In the second state, the first channel opening is located at an end of the second filter segment away from the first filter segment, and the second channel opening is located at an end of the second filter segment close to the first filter segment.

[0011] The flow resistance of the gas transmission channel from the first channel opening to the second channel opening is smaller than the flow resistance of the gas transmission channel from the second channel opening to the first channel opening.

[0012] In some embodiments, the gas delivery channel includes a plurality of flow units connected in series.

[0013] In the direction from the first channel opening to the second channel opening, the flow unit is configured to generate a first resistance to the flue gas flowing from the first channel opening to the second channel opening.

[0014] In the direction from the second channel opening to the first channel opening, the flow unit is configured to generate a second resistance to the flue gas flowing from the second channel opening to the first channel opening.

[0015] The first resistance is smaller than the second resistance.

[0016] In some embodiments, the flow unit includes a first flow channel and a second flow channel. In the direction approaching from the first channel opening to the second channel opening, there is a first angle between the inlet directions of the first flow channel and the second flow channel, and there is a second angle between the outflow directions of the first flow channel and the second flow channel, wherein the first angle is greater than or equal to 90 degrees and the second angle is less than 90 degrees.

[0017] In some embodiments, the length of the first flow channel is less than the length of the second flow channel.

[0018] In some embodiments, the first flow channel includes at least a straight flow channel; and / or the second flow channel includes at least a curved flow channel.

[0019] In some embodiments, the second filter segment includes a shell and an adjustment part. The shell is connected to the first filter segment. The gas transmission channel is arranged in the adjustment part. The adjustment part is detachably installed inside the shell to achieve switching between the first state and the second state by changing the relative position of the adjustment part and the shell.

[0020] In some embodiments, the second filter segment further includes at least two sliders, the inner wall of the shell and / or the outer wall of the adjustment portion is provided with grooves extending along the axial direction of the second filter segment, and the sliders are slidably disposed in the grooves.

[0021] In some embodiments, the slider includes a resilient block.

[0022] In some embodiments, the second filter segment further includes a shielding portion arranged along the circumference of the shell and / or the adjustment portion, and the shielding portion is installed at an end of the second filter segment away from the first filter segment to cover the gap between the shell and the adjustment portion.

[0023] According to another aspect of the present invention, a cigarette is provided, comprising the above-mentioned cigarette filter.

[0024] Based on the above technical solution, the present invention, by providing a second filter segment and setting its state to be variable, can change the flow state (e.g., flow rate, flow rate, and continuity) of the smoke output from the second filter segment, thereby varying the resistance felt by the user during inhalation. Specifically, because the flow resistance of the gas transmission channel differs in the two directions, when the smoke flows from the first channel opening to the second channel opening, it encounters less resistance, resulting in a greater amount of smoke mist per puff, which helps enhance the user's sense of satisfaction. Conversely, when the smoke flows from the second channel opening to the first channel opening, it encounters greater resistance, resulting in a smaller amount of smoke mist per puff, a more stable smoke flow rate, and better puff-by-puff stability. This allows users to experience a stronger sense of satisfaction or a more complex experience during the inhalation process, thereby optimizing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 The figure shows a structural diagram of an embodiment of the cigarette of the present invention.

[0027] Figure 2 A schematic structural diagram of a first angle of the second filter segment in an embodiment of the cigarette filter of the present invention is shown.

[0028] Figure 3 A schematic structural diagram of a second angle of the second filter segment in one embodiment of the cigarette filter of the present invention is shown.

[0029] Figure 4 Shown Figure 3 Right view of the second filter section.

[0030] In the picture:

[0031] 1. First filter section; 2. Second filter section; 201. Gas transmission channel; 201a. First channel opening; 201b. Second channel opening; 2011. First flow channel; 2012. Second flow channel; 21. Shell; 22. Adjustment section; 221. First end face; 222. Second end face; 23. Slider; 3. Cigarette body. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present invention.

[0034] With the development of the consumer goods market, consumers' demands for the quality of tobacco products are constantly increasing. This not only involves the selection of tobacco ingredients and flavor types, but also the state of smoke flow within the product, which is a key factor affecting consumers' sensory experience. Therefore, this application provides a cigarette filter that can be applied to products such as cigarettes and electronic cigarettes, helping to improve the user's smoking experience.

[0035] refer to Figure 1 As shown, in some embodiments of the cigarette filter provided by the present invention, the cigarette filter includes a first filter segment 1 and a second filter segment 2, the first filter segment 1 is configured to filter smoke; the second filter segment 2 is connected to the first filter segment 1, and the second filter segment 2 is provided with a gas transmission channel 201 for transmitting smoke, the gas transmission channel 201 has a first channel opening 201a and a second channel opening 201b that are interconnected, and the second filter segment 2 can switch between a first state and a second state.

[0036] In the first state, the first channel opening 201a is located at the end of the second filter segment 2 close to the first filter segment 1, and the second channel opening 201b is located at the end of the second filter segment 2 away from the first filter segment 1; in the second state, the first channel opening 201a is located at the end of the second filter segment 2 away from the first filter segment 1, and the second channel opening 201b is located at the end of the second filter segment 2 close to the first filter segment 1.

[0037] The flow resistance from the first channel opening 201a to the second channel opening 201b of the gas transmission channel 201 is smaller than the flow resistance from the second channel opening 201b to the first channel opening 201a of the gas transmission channel 201. In other words, the flow resistances of the gas transmission channel 201 in both directions are different.

[0038] The first filter segment 1 can be configured to filter harmful substances from the smoke, such as particulate matter and tar. By changing the state of the second filter segment 2 (i.e., changing the orientation of the opening of the gas transmission channel 201), the flow state (e.g., flow rate, flow rate, and continuity) of the smoke output from the second filter segment 2 can be changed, thereby changing the resistance felt by the user during inhalation, for example, making the inhalation process smoother or more complex, thereby optimizing the user's sensory experience.

[0039] Since the flow resistance of the gas transmission channel 201 in the two directions is different, when the smoke flows from the first channel opening 201a to the second channel opening 201b, the resistance it encounters is smaller, so the user obtains a larger amount of smoke mist with each puff, which helps to enhance the sense of satisfaction; conversely, when the smoke flows from the second channel opening 201b to the first channel opening 201a, the resistance it encounters is larger, so the user obtains a smaller amount of smoke mist with each puff, the flow rate of the smoke is more stable, and the puff-by-puff stability is good.

[0040] Specifically, different flow resistances can be obtained by changing the material of the gas transmission channel 201 , using different resistance structures in the gas transmission channel 201 , and the like.

[0041] In some embodiments, the material of the gas delivery channel 201 includes one of polylactic acid (PLA), silicone, polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polystyrene (PS), acrylonitrile butadiene styrene (ABS), polycarbonate (PC), and polytetrafluoroethylene (PTFE).

[0042] Alternatively, the material of the gas transmission channel 201 may also include multiple materials among the above materials. For example, different materials may be used in different parts of the gas transmission channel 201 to obtain different resistance effects at different positions.

[0043] In some embodiments, the first filter segment 1 and the second filter segment 2 are detachably connected. The first filter segment 1 can be a conventional cigarette filter. Thus, by adding the second filter segment 2 to the existing filter (first filter segment 1) without affecting the structure of the tobacco product itself, the flow of smoke from the cigarette can be adjusted, thereby improving the user experience.

[0044] In some embodiments, the gas delivery channel 201 includes a plurality of flow units connected in series, and in the direction approaching from the first channel opening 201a to the second channel opening 201b, the flow unit is configured to generate a first resistance to the flue gas flowing from the first channel opening 201a to the second channel opening 201b, and in the direction approaching from the second channel opening 201b to the first channel opening 201a, the flow unit is configured to generate a second resistance to the flue gas flowing from the second channel opening 201b to the first channel opening 201a, wherein the first resistance is smaller than the second resistance.

[0045] The provision of multiple flow units in series allows for step-by-step regulation of the flue gas flow state as the flue gas flows through the gas transmission channel 201 , thereby facilitating more stable and accurate adjustment of flue gas parameters such as velocity and flow rate.

[0046] By making the first resistance smaller than the second resistance, the energy loss of the flue gas in the process of flowing from the first channel opening 201a to the second channel opening 201b is smaller than the energy loss of the flue gas in the process of flowing from the second channel opening 201b to the first channel opening 201a, thereby allowing the second filter segment 2 to output flue gas with different flow states.

[0047] The number of flow units, the resistance of a single flow unit, etc. can be set according to actual needs to obtain different first resistances or second resistances.

[0048] Different flow resistances can be obtained by adopting different flow channel arrangements in the flow unit.

[0049] refer to Figure 2 and Figure 3 As shown, in some embodiments, the gas delivery channel further includes a gas delivery section provided at both ends of a plurality of flow units connected in series. The gas delivery section extends from the end surface of the second filter section 2 to the flow channel opening of the flow unit, for example, to the intersection of the first flow channel 2011 and the second flow channel 2012.

[0050] In such Figure 3 and Figure 4 In the illustrated embodiment, the channel opening (the second channel opening 201 b ) of the gas transmission section is provided on the end surface of the second filter section 2 .

[0051] exist Figure 2 and Figure 3 In the illustrated embodiment, the gas delivery section is a straight pipe section, but its structure is not limited to this. In specific applications, parameters such as the length, shape, and direction of the gas delivery section can be adjusted according to the structure of the flow unit and the second filter section, thereby achieving flexible configuration of the overall structure of the gas delivery channel 201 to meet the production requirements of tobacco products of different specifications.

[0052] In some embodiments, the flow unit includes a first flow channel 2011 and a second flow channel 2012. In the direction approaching from the first channel opening 201a to the second channel opening 201b, there is a first angle between the inlet directions of the first flow channel 2011 and the second flow channel 2012, and there is a second angle between the outflow directions of the first flow channel 2011 and the second flow channel 2012, wherein the first angle is greater than or equal to 90 degrees, and the second angle is less than 90 degrees.

[0053] When the smoke flows from the first channel opening 201a to the second channel opening 201b, Figure 3 As shown, the smoke flows from left to right. Since the inflow direction of the first flow channel 2011 is substantially consistent with the direction of smoke output from the gas transmission section, the majority of the smoke will enter the first flow channel 2011. However, since the first angle is greater than or equal to 90 degrees (i.e., the angle difference is significant), only a small portion of the smoke will be diverted to enter the second flow channel 2012, thereby reducing the energy loss caused by smoke diversion. Furthermore, when the smoke flows out from the right end of the first flow channel 2011 and the second flow channel 2012, since the second angle is less than 90 degrees, the flow directions of the smoke flowing out of the first flow channel 2011 and the second flow channel 2012 are relatively close, forming a convergence trend. This also reduces the energy loss caused by smoke collision, and the flow rate or flow rate of the smoke flowing out of the second channel opening 201b is relatively high.

[0054] On the contrary, when the smoke flows from the second channel opening 201b and flows toward the first channel opening 201a, Figure 2 As shown, the smoke flows from left to right and is diverted to the first flow channel 2011 and the second flow channel 2012. Furthermore, when the smoke flows out from the right ends of the first flow channel 2011 and the second flow channel 2012, since the first angle is greater than or equal to 90 degrees, the smoke flowing out of the two flow channels will collide more violently, resulting in greater energy loss, and thus the flow rate or flow of the smoke flowing out of the first channel opening 201a is smaller.

[0055] Furthermore, different flow resistances can be obtained by setting the length or shape of the flow channel.

[0056] refer to Figure 2 and Figure 3 As shown, in some embodiments, the length of the first flow channel 2011 is less than the length of the second flow channel 2012 .

[0057] In other embodiments, the first flow channel 2011 includes at least a straight flow channel; and / or the second flow channel 2012 includes at least a curved flow channel.

[0058] Specifically, a longer flow channel or a more curved flow channel shape results in greater flow losses. Therefore, when the smoke flows from the second channel opening 201b to the first channel opening 201a, the second flow channel 2012 can effectively consume the energy of the smoke passing through it. Conversely, when the smoke flows from the first channel opening 201a to the second channel opening 201b, the energy loss of this portion of the smoke is essentially negligible due to the small amount of smoke in the second flow channel 2012.

[0059] In some embodiments, the second filter section 2 includes a housing 21 and a regulating portion 22. The housing 21 is connected to the first filter section 1. The gas delivery channel 201 is provided in the regulating portion 22.

[0060] The adjusting portion 22 is detachably mounted inside the housing 21 , so that the switching between the first state and the second state can be achieved by changing the relative position of the adjusting portion 22 and the housing 21 .

[0061] In some embodiments, reference Figure 2 and Figure 3 As shown, the adjusting portion 22 has a first end face 221 and a second end face 222, the first channel opening 201a is located at the first end face 221, and the second channel opening 201b is located at the second end face 222. In the first state of the second filter segment 2, the first end face 221 faces the first filter segment 1, and the second end face 222 faces away from the first filter segment 1. In the second state of the second filter segment 2, the second end face 222 faces the first filter segment 1, and the first end face 221 faces away from the first filter segment 1.

[0062] The regulating portion 22 can be manufactured by 3D printing so as to obtain the required flow channel structure inside it.

[0063] The structural forms of the first end surface 221 and the second end surface 222 can also be designed as needed.

[0064] For example, in some embodiments, the first end surface 221 and the second end surface 222 can be closed surfaces, so that the smoke flowing through the second filter segment 2 only flows out or in through the first channel opening 201a and the second channel opening 201b, which helps the user to obtain a stable smoking taste.

[0065] In other embodiments, a filtering or flavoring medium is filled between the inner wall of the regulating portion 22 and the outer wall of the gas transmission channel 201, and the first end face 221 and the second end face 222 can be further set as ventilation surfaces, so that the second filter segment 2 can not only output smoke with different fog volume and taste, but also output smoke after flavoring or secondary filtration, thereby achieving the purpose of increasing the smoke level and improving user experience.

[0066] refer to Figure 4As shown, in some embodiments, the second filter segment 2 further includes at least two sliders 23, and the inner wall of the shell 21 and / or the outer wall of the adjustment portion 22 are provided with grooves extending along the axial direction of the second filter segment 2, and the sliders 23 are slidably arranged in the grooves.

[0067] By setting up a structure in which the slider 23 and the groove cooperate, the slider 23 can be used as a fulcrum for connecting the shell 21 and the adjustment part 22, and the flexibility of the relative movement between the shell 21 and the adjustment part 22 can be improved through sliding cooperation, which is convenient for the user to adjust the position of the adjustment part 22.

[0068] In some embodiments, a plurality of sliders 23 are evenly arranged along the circumference of the second filter segment 2 to improve the sliding stability between the housing 21 and the adjusting portion 22 when the adjusting portion 22 is in the correct position.

[0069] In some embodiments, the slider 23 includes an elastic block that can provide elastic force to the housing 21 and the adjusting portion 22 along the radial direction of the second filter segment 2 , especially to keep the adjusting portion 22 stable in position after being adjusted into position relative to the housing 21 .

[0070] In other embodiments, positioning grooves may be provided at corresponding positions on the inner wall of the shell 21 and the outer wall of the adjustment portion 22, so that when the slider 23 moves to the positioning groove, the shell 21 and the adjustment portion 22 are axially limited relative to the second filter segment 2, thereby ensuring the structural stability of the second filter segment 2.

[0071] In some embodiments, the second filter segment 2 also includes a shielding portion arranged along the circumference of the shell 21 and / or the adjustment portion 22, and the shielding portion is installed at the end of the second filter segment 2 away from the first filter segment 1 to cover the gap between the shell 21 and the adjustment portion 22.

[0072] By providing a shielding portion to cover the gap between the shell 21 and the adjusting portion 22, the end of the second filter segment 2 can obtain a flat surface, so that the user will not feel a foreign object when using the cigarette filter, thereby improving the user experience.

[0073] Based on the above cigarette filter, the utility model also proposes a cigarette, Figure 1 As shown, the cigarette includes a cigarette body 3 and the above-mentioned cigarette filter, and the first filter segment 1 of the cigarette filter is connected between the cigarette body 3 and the second filter segment 2 of the cigarette filter.

[0074] Several specific embodiments of the cigarette filter and cigarette of the present invention are described below. In the following embodiments, the cigarette is a cigarette, the cigarette body 3 is a tobacco segment of the cigarette, the cigarette body 3 and the cigarette filter are both cylindrical in structure, the second filter segment 2 is an overall cylindrical structure, the housing 21 is a cylindrical structure, the adjustment portion 22 is a cylindrical structure, and an annular gap is defined between the housing 21 and the adjustment portion 22.

[0075] Example 1

[0076] The material of the second filter segment 2 is PLA, the diameter of the second filter segment 2 is 7.6 mm, the axial length is 5 mm, and the thickness of the shell 21 is 0.5 mm.

[0077] During the cigarette production process, filter rod forming equipment is used to insert the second filter segment 2 into existing filter rods on the production line, forming the cigarette filter structure of the present application. The first filter segment 1 is a structure already present in the filter rods on the production line, and the filter medium is acetate fiber tow, with a unit length of 25 mm. Furthermore, cigarettes are produced using cigarette clinging equipment, resulting in cigarettes with a diameter of 7.8 mm, wherein the tobacco segment is 54 mm long.

[0078] The sensory results of the test show that the direction of the smoke flow in the regulating part 22 is as follows Figure 3 As shown, the smoke mist at the outlet of the second filter section 2 (the second channel opening 201b) is large, and the user's satisfaction is enhanced; the smoke flow direction in the regulating part 22 is as follows Figure 2 As shown, the smoke mist volume at the outlet of the second filter section 2 (the first channel opening 201a) is average, but the flow rate tends to be stable, and the puff-by-puff stability is good.

[0079] Example 2

[0080] The material of the second filter segment 2 is PP, the diameter of the second filter segment 2 is 5.3 mm, the axial length is 10 mm, and the thickness of the shell 21 is 1 mm.

[0081] During the cigarette production process, filter rod forming equipment is used to insert the second filter segment 2 into existing filter rods on the production line, forming the cigarette filter structure of the present application. The first filter segment 1 is a structure already present in the filter rods on the production line, and the filter medium is acetate fiber tow, with a unit length of 20 mm. Furthermore, cigarettes are produced using cigarette clinging equipment, resulting in cigarettes with a diameter of 5.4 mm, wherein the tobacco segment is 60 mm long.

[0082] The sensory results of the test show that the direction of the smoke flow in the regulating part 22 is as follows Figure 3 As shown, the smoke mist at the outlet of the second filter section 2 (the second channel opening 201b) is large, and the user's satisfaction is enhanced; the smoke flow direction in the regulating part 22 is as follows Figure 2 As shown, the smoke mist volume at the outlet of the second filter section 2 (the first channel opening 201a) is average, but the flow rate tends to be stable, and the puff-by-puff stability is good.

[0083] Example 3

[0084] The material of the second filter segment 2 is PC, the diameter of the second filter segment 2 is 6.3 mm, the axial length is 15 mm, and the thickness of the shell 21 is 0.8 mm.

[0085] During the cigarette production process, filter rod forming equipment is used to insert the second filter segment 2 into existing filter rods on the production line, forming the cigarette filter structure of the present application. The first filter segment 1 is a structure already present in the filter rods on the production line, and the filter medium is acetate fiber tow with a unit length of 15 mm. Furthermore, cigarettes are produced using cigarette clinging equipment, resulting in cigarettes with a diameter of 6.54 mm, wherein the tobacco segment is 60 mm long.

[0086] The sensory results of the test show that the direction of the smoke flow in the regulating part 22 is as follows Figure 3 As shown, the smoke mist at the outlet of the second filter section 2 (the second channel opening 201b) is large, and the user's satisfaction is enhanced; the smoke flow direction in the regulating part 22 is as follows Figure 2 As shown, the smoke mist volume at the outlet of the second filter section 2 (the first channel opening 201a) is average, but the flow rate tends to be stable, and the puff-by-puff stability is good.

[0087] The sensory test results of the above embodiments show that the cigarette filter of the present application is suitable for cigarettes of various specifications, and can achieve a larger smoke mist volume or better puff-by-puff stability.

[0088] Compared with the filter rod forming equipment in the related art, the filter rod forming equipment in the above-mentioned embodiments of the present application has been adaptively modified to adapt to the production and manufacturing requirements of the cigarette filters and cigarettes of the present application.

[0089] Through the description of multiple embodiments of the cigarette filter and cigarette of the present invention, it can be seen that the cigarette filter and cigarette of the present invention have at least the following advantages:

[0090] Setting up a second filter segment and making it state-variable can change the flow state of the smoke in the cigarette, obtaining a larger smoke mist volume or better puff-by-puff stability, thereby optimizing the user's sensory experience;

[0091] Setting different flow resistances in the two directions of the gas transmission channel allows users to choose different suction experiences according to their needs, with strong selectivity and flexibility;

[0092] The structures of the first filter segment and the second filter segment do not interfere with each other, so that the flow state of the smoke output by the cigarette can be adjusted by adding the second filter segment without changing the structure of the tobacco product itself. It has a wide product applicability and helps to achieve large-scale production of the cigarette filters and cigarettes of this application to meet market needs.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that without departing from the principles of the present invention, the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents. These modifications and equivalent replacements should all be included in the scope of the technical solutions claimed for protection in the present invention.

Claims

1. A cigarette filter, characterized in that: include: A first filter section (1) configured to filter smoke; and The second filter segment (2) is connected to the first filter segment (1), and the second filter segment (2) is provided with a gas delivery channel (201) for delivering the smoke, the gas delivery channel (201) having a first channel opening (201a) and a second channel opening (201b) that are interconnected, and the second filter segment (2) has a first state and a second state. In the first state, the first channel opening (201a) is located at an end of the second filter segment (2) close to the first filter segment (1), and the second channel opening (201b) is located at an end of the second filter segment (2) away from the first filter segment (1). In the second state, the first channel opening (201a) is located at an end of the second filter segment (2) away from the first filter segment (1), and the second channel opening (201b) is located at an end of the second filter segment (2) close to the first filter segment (1). The flow resistance of the gas transmission channel (201) from the first channel opening (201a) to the second channel opening (201b) is smaller than the flow resistance of the gas transmission channel (201) from the second channel opening (201b) to the first channel opening (201a).

2. The cigarette filter according to claim 1, characterized in that: The gas transmission channel (201) comprises a plurality of flow units connected in series, and the flow units are configured to generate a resistance to the flue gas flowing from the first channel opening (201a) to the second channel opening (201b) that is smaller than the resistance generated to the flue gas flowing from the second channel opening (201b) to the first channel opening (201a).

3. The cigarette filter according to claim 2, characterized in that: The flow unit comprises a first flow channel (2011) and a second flow channel (2012); in a direction approaching from the first channel opening (201a) to the second channel opening (201b), a first angle is formed between the inflow directions of the first flow channel (2011) and the second flow channel (2012); and a second angle is formed between the outflow directions of the first flow channel (2011) and the second flow channel (2012), wherein the first angle is greater than or equal to 90 degrees, and the second angle is less than 90 degrees.

4. The cigarette filter according to claim 3, characterized in that: The length of the first flow channel (2011) is smaller than the length of the second flow channel (2012).

5. The cigarette filter according to claim 3, characterized in that: The first flow channel (2011) comprises at least a straight flow channel; and / or The second flow channel (2012) comprises at least an arc-shaped flow channel.

6. The cigarette filter according to claim 1, characterized in that: The second filter section (2) comprises a housing (21) and an adjusting portion (22), the housing (21) being connected to the first filter section (1), and the gas delivery channel (201) being arranged in the adjusting portion (22). The adjusting portion (22) is detachably mounted inside the housing (21) so as to achieve switching between the first state and the second state by changing the relative position of the adjusting portion (22) and the housing (21).

7. The cigarette filter according to claim 6, characterized in that: The second filter segment (2) further comprises at least two sliders (23), the inner wall of the housing (21) and / or the outer wall of the adjusting portion (22) being provided with grooves extending along the axial direction of the second filter segment (2), and the sliders (23) being slidably arranged in the grooves.

8. The cigarette filter according to claim 7, characterized in that: The slider (23) includes an elastic block.

9. The cigarette filter according to claim 6, characterized in that: The second filter segment (2) further comprises a shielding portion arranged along the circumference of the housing (21) and / or the adjusting portion (22), the shielding portion being mounted at an end of the second filter segment (2) away from the first filter segment (1) to cover a gap between the housing (21) and the adjusting portion (22).

10. A cigarette, characterized in that: Comprising the cigarette filter according to any one of claims 1 to 9.

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