Smoke filtering device and smoking set

Abstract

The utility model discloses a smoke filtering device and a smoking set. The smoke filtering device comprises a cigarette base and a cigarette holder which are sequentially arranged in the smoke flowing direction. The filter outer bin is arranged between the cigarette holder and the cigarette holder, a smoke passing channel is formed in the filter outer bin, and the cigarette holder is communicated with the cigarette holder through the smoke passing channel; and the catalysis part is assembled on the smoke passing channel and is spirally arranged in the smoke flowing direction. According to the utility model, the filtering outer bin is arranged between the cigarette holder and the cigarette seat, so that the smoke sucked by the cigarette seat flows to the cigarette holder through the smoke passing channel in the filtering outer bin, the smoke is driven to be in contact with the catalytic part in the smoke passing channel, and the catalytic part and the smoke are subjected to catalytic reaction; the catalytic part is spirally arranged in the flowing direction of the flue gas, so that the contact area and the contact time of the flue gas and the catalytic part can be increased, the catalytic effect is improved, and harmful components in the flue gas are effectively filtered out.

Description

Technical Field

[0001] The utility model relates to the technical field of smoking articles, in particular to a smoke filtering device and a smoking article. Background Art

[0002] Originating in the Americas, tobacco has been a constant companion to the development of human society since its introduction. It has now become a consumer product that combines both commercial and cultural attributes. In today's rapidly developing world, tobacco is used not only to make ordinary cigarettes and tobacco, but also in e-cigarette cartridges and e-liquids, catering to the needs of diverse consumer groups. However, tobacco and its products contain numerous carcinogenic and harmful ingredients. Therefore, whether consumers smoke regular cigarettes or use e-cigarettes, the smoke produced by tobacco and its products carries numerous carcinogenic and harmful ingredients into the human body, impacting human health. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art described above, the present invention provides a smoke filter device that can effectively filter out harmful components in smoke.

[0004] According to an embodiment of the present invention, a smoke filtering device includes: a cigarette holder and a cigarette holder arranged in sequence along the direction of smoke flow; a filter outer compartment, the filter outer compartment is arranged between the cigarette holder and the cigarette holder, and a smoke passage is opened inside, the cigarette holder is connected to the cigarette holder through the smoke passage; a catalytic component, the catalytic component is assembled in the smoke passage and is spirally arranged along the direction of smoke flow.

[0005] In this smoke filtering device, the filter outer chamber is arranged between the cigarette holder and the cigarette base, so that the smoke inhaled by the cigarette base flows to the cigarette holder through the smoke passage in the filter outer chamber, driving the smoke to contact the catalyst in the smoke passage, so that the catalyst and the smoke undergo a catalytic reaction, and the catalyst is arranged in a spiral shape along the flow direction of the smoke, which can increase the contact area and time between the smoke and the catalyst, improve the catalytic effect, and effectively filter out harmful components in the smoke.

[0006] According to some embodiments of the present invention, a catalytic inner chamber is further installed in the smoke passage, the catalytic component is installed in the catalytic inner chamber, and a first opening is opened at one end of the catalytic inner chamber close to the cigarette holder, and a second opening is opened at one end of the catalytic inner chamber close to the cigarette holder, the first opening is connected to the smoke outlet of the cigarette holder, and the second opening is connected to the smoke inlet of the cigarette holder.

[0007] According to some embodiments of the present invention, the inner diameter of the first opening is greater than the inner diameter of the second opening.

[0008] According to some embodiments of the present invention, the catalytic component and the catalytic inner chamber are both made of alloy copper.

[0009] According to some embodiments of the present invention, the cigarette holder and the filter outer compartment are integrally formed, and the smoke outlet of the filter outer compartment is provided with a first connecting part, and the smoke inlet of the cigarette holder is provided with a second connecting part, and the first connecting part and the second connecting part are detachably connected.

[0010] According to some embodiments of the present invention, the cigarette holder and the filter outer compartment are integrally formed, and the smoke outlet of the cigarette holder extends outward to form a first connecting tube, the first connecting tube is provided with a third connecting part, and the smoke inlet of the filter outer compartment is provided with a fourth connecting part, and the fourth connecting part is detachably connected to the third connecting part.

[0011] According to some embodiments of the present invention, a sealing groove is provided on the first connecting tube, and a sealing ring is assembled in the sealing groove and abuts against the filter outer compartment.

[0012] According to some embodiments of the present invention, the first connecting tube is provided with a second connecting tube extending into the first opening, and one end of the catalytic component is nested inside the second connecting tube.

[0013] According to some embodiments of the present invention, the smoke inlet of the cigarette holder is provided with a clamping connection portion, and the clamping connection portion is arranged in a stepped shape.

[0014] Based on the same inventive concept, the present invention also provides a smoking device comprising the smoke filtering device described above.

[0015] In summary, the smoke filter device provided by the present invention has the following technical effects:

[0016] By arranging the filter outer chamber between the cigarette holder and the cigarette base, the smoke inhaled by the cigarette base flows to the cigarette holder through the smoke passage in the filter outer chamber, driving the smoke to contact the catalytic element in the smoke passage, so that a catalytic reaction occurs between the catalytic element and the smoke, and the catalytic element is arranged in a spiral shape along the flow direction of the smoke, which can increase the contact area and time between the smoke and the catalytic element, improve the catalytic effect, and effectively filter out harmful components in the smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a smoke filter device according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic structural diagram of the smoke filtering device of Example 1;

[0019] Figure 3This is another structural schematic diagram of the smoke filtering device of Example 1;

[0020] Figure 4 This is another structural schematic diagram of the smoke filtering device according to an embodiment of the present utility model;

[0021] Figure 5 This is a schematic structural diagram of a smoke filtration device according to Example 2;

[0022] Figure 6 This is another structural diagram of the smoke filtering device of Example 2.

[0023] The meanings of the reference numerals are as follows:

[0024] 1. Cigarette holder; 11. First connecting tube; 12. Second connecting tube; 13. Clamping connection; 14. Sealing groove; 15. Sealing ring; 2. Cigarette holder; 21. Second connection; 3. Filter outer chamber; 31. Smoke passage; 32. First connection; 4. Catalytic element; 5. Catalytic inner chamber; 51. First opening; 52. Second opening. DETAILED DESCRIPTION

[0025] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They 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. Therefore, they cannot be understood as limiting the present invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0028] Example 1:

[0029] See Figure 1 、 Figure 2 and Figure 4This embodiment discloses a smoke filter device. The smoke filter device includes a cigarette holder 1, a filter outer compartment 3, a catalytic element 4, and a mouthpiece 2. Optionally, the cigarette holder 1 and the mouthpiece 2 are arranged in sequence along the direction of smoke flow; the filter outer compartment 3 is disposed between the mouthpiece 2 and the mouthpiece 2, and has a smoke passage 31 defined therein, through which the mouthpiece 2 communicates with the mouthpiece 2; the catalytic element 4 is assembled in the smoke passage 31 and is disposed in a spiral shape along the direction of smoke flow. Preferably, the filter outer chamber 3 is arranged between the cigarette holder 2 and the cigarette holder 1, so that the smoke inhaled by the cigarette holder 1 flows to the cigarette holder 2 through the smoke passage 31 in the filter outer chamber 3, driving the smoke to contact the catalyst 4 in the smoke passage 31, so that the catalyst 4 and the smoke undergo a catalytic reaction, and the catalyst 4 is arranged in a spiral shape along the flow direction of the smoke, which can increase the contact area and time between the smoke and the catalyst 4, improve the catalytic effect, and effectively filter out harmful components in the smoke.

[0030] See Figure 2 and Figure 3 Optionally, the cigarette holder 1 is provided with a clamping connection portion 13 at the cigarette inlet, and the inner diameter of the clamping connection portion 13 is arranged to decrease along the direction of smoke flow, so that the cigarette holder 1 can be connected to cigarettes, pipes, or electronic cigarette cartridges of different specifications through the clamping connection portion 13. Preferably, the clamping connection portion 13 is arranged in a stepped shape, so that when cigarettes, pipes, or electronic cigarette cartridges of different specifications are inserted into the clamping connection portion 13, there is a sufficiently large contact surface between the two, thereby improving the stability of the cigarettes, pipes, or electronic cigarette cartridges inserted into the clamping connection portion 13. Furthermore, the direction of smoke flow is from the cigarette holder 1 to the cigarette holder 2. Specifically, the user can inhale from the cigarette holder 2 to allow smoke to enter the cigarette holder 1 from the cigarette inlet 1 and flow to the cigarette holder 2 through the smoke passage 31 in the filter outer chamber 3. When the flue gas enters the smoke passage 31 of the filter outer chamber 3, the flue gas will contact the catalyst 4 in the smoke passage 31 and a catalytic reaction will occur. At the same time, since the catalyst 4 is spirally arranged in the smoke passage 31 along the flow direction of the flue gas, the flue gas will contact the catalyst 4 and a catalytic reaction will occur from the time it enters the smoke passage 31 to the time it leaves the smoke passage 31, thereby increasing the contact area and time between the flue gas and the catalyst 4, improving the catalytic effect, and further reducing harmful components in the flue gas.

[0031] Preferably, the catalytic element 4 is made of a copper alloy. Optionally, the copper alloy can be an alloy composed of copper and one or more other elements, or a nanoalloy formed by mixing nanoparticles of copper and other materials. Specifically, the copper alloy material catalyzes alkanes, alkenes, benzene series, aldehydes, acids, and polycyclic aromatic hydrocarbons, thereby filtering out substances such as alkanes, alkenes, benzene series, aldehydes, acids, and polycyclic aromatic hydrocarbons in the flue gas, thereby reducing the content of substances such as tar, nicotine, and nitrosamines in the flue gas, thereby filtering out harmful components in the flue gas. Specifically, when the flue gas enters the smoke passage 31, the flue gas will come into contact with the surface of the catalyst 4, so that the catalyst 4 made of alloy copper will undergo a catalytic reaction with alkanes, alkenes, benzene series, aldehydes, acids and polycyclic aromatic hydrocarbons, thereby filtering out substances such as alkanes, alkenes, benzene series, aldehydes, acids and polycyclic aromatic hydrocarbons in the flue gas, thereby effectively reducing the content of harmful components such as tar, nicotine and nitrosamines in the flue gas.

[0032] See Figure 1 、 Figure 2 and Figure 3 Optionally, the cigarette holder 1 and the filter outer compartment 3 are integrally formed. Furthermore, the smoke outlet of the filter outer compartment 3 is provided with a first connecting portion 32, and the smoke inlet of the cigarette holder 2 is provided with a second connecting portion 21, and the first connecting portion 32 and the second connecting portion 21 are detachably connected. Optionally, in this embodiment, the materials of the cigarette holder 1, the filter outer compartment 3 and the cigarette holder 2 are not limited; optionally, the first connecting portion 32 is an internal thread structure, and the second connecting portion 21 is an external thread structure that cooperates with the first connecting portion 32, so that the filter outer compartment 3 and the cigarette holder 2 can be quickly assembled and disassembled through the threaded connection between the second connecting portion 21 and the first connecting portion 32.

[0033] See Figure 4 Optionally, the mouthpiece 2 and the filter outer chamber 3 are integrally formed. Furthermore, the smoke outlet of the cigarette holder 1 extends outward to form a first connecting tube 11, and the first connecting tube 11 is provided with a third connecting part. The smoke inlet of the filter outer chamber 3 is provided with a fourth connecting part, and the fourth connecting part is detachably connected to the third connecting part. Optionally, the third connecting part is an external thread structure, and the fourth connecting part is an internal thread structure that cooperates with the third connecting part, so that the filter outer chamber 3 and the cigarette holder 1 can be quickly assembled and disassembled through the threaded connection between the third connecting part and the fourth connecting part. Furthermore, a sealing groove 14 is provided on the first connecting tube 11, and a sealing ring 15 is assembled in the sealing groove 14 to abut against the filter outer chamber 3. That is, the sealing ring 15 is used to abut against the filter outer chamber 3 to improve the air tightness between the filter outer chamber 3 and the cigarette holder 1, avoid the leakage of smoke that has not been catalytically filtered, and improve the safety of the equipment.

[0034] See Figure 1 、 Figure 2 and Figure 3 During assembly, the catalytic component 4 is first assembled into the smoke passage 31 of the filter outer chamber 3, and then the second connecting portion 21 is threadedly connected to the first connecting portion 32 to drive the smoke outlet of the smoke passage 31 to communicate with the smoke inlet of the cigarette holder 2, and the assembly is completed; when cleaning, it is only necessary to twist the filter outer chamber 3 and / or the cigarette holder 2 to drive the second connecting portion 21 to separate from the first connecting portion 32, and the catalytic component 4 can be taken out from the smoke passage 31 to clean or replace the components. After cleaning or replacement, it can be reassembled.

[0035] Example 2:

[0036] See Figure 1 、 Figure 4 、 Figure 5 and Figure 6 In this embodiment, the smoke filter device includes a cigarette holder 1, a filter outer compartment 3, a catalytic inner compartment 5, a catalytic element 4 and a cigarette holder 2. The cigarette holder 1 and the cigarette holder 2 are arranged in sequence along the direction of smoke flow; the filter outer compartment 3 is arranged between the cigarette holder 2 and the cigarette holder 2, and a smoke passage 31 is provided inside the filter outer compartment 3, and the cigarette holder 2 is connected to the cigarette holder 2 through the smoke passage 31; the catalytic inner compartment 5 is assembled in the smoke passage 31, and a first opening 52 is provided at one end of the catalytic inner compartment 5 close to the cigarette holder 1, and a second opening 53 is provided at one end of the catalytic inner compartment 5 close to the cigarette holder 2, the first opening 52 is connected to the smoke outlet of the cigarette holder 1, and the second opening 53 is connected to the smoke inlet of the cigarette holder 2, and the catalytic element 4 is arranged in sequence along the direction of smoke flow. The catalytic inner chamber 5 is spirally arranged. Specifically, the flue gas flowing into the smoke holder 1 enters the catalytic inner chamber 5 through the first opening 52. The flue gas diffused in the catalytic inner chamber 5 can contact the surface of the catalytic element 4 and the catalytic inner chamber 5 and undergo a catalytic reaction. The catalytic element 4 is spirally arranged along the direction of flue gas flow, which can increase the contact area between the flue gas and the catalytic element 4. Under the double catalytic action of the catalytic element 4 and the catalytic inner chamber 5, the filtering effect of components such as alkanes, alkenes, benzene series, aldehydes, acids and polycyclic aromatic hydrocarbons in the flue gas is improved, thereby reducing the content of harmful substances such as tar, nicotine and nitrosamines in the flue gas. Optionally, the smoke passage 31, the catalytic inner chamber 5 and the catalytic element 4 can share the same axis, so that in the process of the smoke entering the smoke passage 31 and diffusing in the smoke passage 31, the smoke can better and more evenly contact the catalytic inner chamber 5 and the catalytic element 4.

[0037] See Figure 6Furthermore, the inner diameter of the first opening 52 is larger than the inner diameter of the second opening 53. Specifically, the catalytic inner chamber 5 receives the smoke output from the cigarette holder 1 through the first opening 52 with a larger inner diameter, and at the same time, the catalytic inner chamber 5 transmits the smoke to the cigarette holder 2 through the second opening 53 with a smaller inner diameter. That is, the difference in inner diameter between the first opening 52 and the second opening 53 is utilized to make it easier for smoke to enter the catalytic inner chamber 5, while limiting the efficiency of smoke flowing out of the catalytic inner chamber 5, so that the smoke has more catalytic reaction time with the catalyst 4 and the catalytic inner chamber 5, thereby improving the catalytic effect and further reducing the filtering of harmful components in the smoke.

[0038] Preferably, the copper alloy can be an alloy composed of copper and one or more other elements, or a nanoalloy formed by mixing nanoparticles of copper and other materials. Specifically, the copper alloy material can be used to catalyze alkanes, alkenes, benzene series, aldehydes, acids, and polycyclic aromatic hydrocarbons (PAHs), thereby filtering out substances such as alkanes, alkenes, benzene series, aldehydes, acids, and PAHs from the flue gas, thereby reducing the content of substances such as tar, nicotine, and nitrosamines in the flue gas, thereby filtering out harmful components in the flue gas.

[0039] See Figure 1 Optionally, the cigarette holder 1 and the filter outer compartment 3 are integrally formed. Furthermore, the smoke outlet of the filter outer compartment 3 is provided with a first connecting portion 32, and the smoke inlet of the cigarette holder 2 is provided with a second connecting portion 21, and the first connecting portion 32 and the second connecting portion 21 are detachably connected. Optionally, in this embodiment, the materials of the cigarette holder 1, the filter outer compartment 3 and the cigarette holder 2 are not limited; optionally, the first connecting portion 32 is an internal thread structure, and the second connecting portion 21 is an external thread structure that cooperates with the first connecting portion 32, so that the filter outer compartment 3 and the cigarette holder 2 can be quickly assembled and disassembled through the threaded connection between the second connecting portion 21 and the first connecting portion 32.

[0040] See Figure 4Optionally, the mouthpiece 2 and the filter outer chamber 3 are integrally formed. Furthermore, the smoke outlet of the cigarette holder 1 extends outward to form a first connecting tube 11, and the first connecting tube 11 is provided with a third connecting part. The smoke inlet of the filter outer chamber 3 is provided with a fourth connecting part, and the fourth connecting part is detachably connected to the third connecting part. Optionally, the third connecting part is an external thread structure, and the fourth connecting part is an internal thread structure that cooperates with the third connecting part, so that the filter outer chamber 3 and the cigarette holder 1 can be quickly assembled and disassembled through the threaded connection between the third connecting part and the fourth connecting part. Furthermore, a sealing groove 14 is provided on the first connecting tube 11, and a sealing ring 15 is assembled in the sealing groove 14 to abut against the filter outer chamber 3. That is, the sealing ring 15 is used to abut against the filter outer chamber 3 to improve the air tightness between the filter outer chamber 3 and the cigarette holder 1, avoid the leakage of smoke that has not been catalytically filtered, and improve the safety of the equipment.

[0041] See Figure 5 and Figure 6 Furthermore, the first connecting tube 11 is provided with a second connecting tube 12 extending into the first opening 52, and one end of the catalytic element 4 is nested inside the second connecting tube 12. That is, the second connecting tube 12 is located between the catalytic inner chamber 5 and the catalytic element 4. The flue gas from the cigarette holder 1 directly enters the inner cavity of the spirally arranged catalytic element 4 through the first connecting tube 11 and the second connecting tube 12 in sequence. During the diffusion process, the flue gas first contacts the surface of the catalytic element 4, driving the components such as alkanes, alkenes, benzene series, aldehydes, acids and polycyclic aromatic hydrocarbons in the flue gas to undergo a catalytic reaction. The flue gas then diffuses into the gap between the catalytic element 4 and the catalytic inner chamber 5, contacts the surface of the catalytic element 4 and / or the catalytic inner chamber 5, and undergoes a catalytic reaction again. Therefore, the flue gas entering the smoke passage 31 can further reduce the content of harmful substances such as tar, nicotine and nitrosamines under the secondary catalytic action of the catalytic element 4 and the catalytic inner chamber 5.

[0042] See Figure 4 、 Figure 5 and Figure 6During assembly, first, one end of the catalytic component 4 is nested inside the second connecting tube 12, and then the catalytic inner chamber 5 is nested outside the second connecting tube 12, so that the second connecting tube 12 extends into the first opening 52, and the catalytic component 4 is accommodated in the catalytic inner chamber 5, and then the third connecting portion is threadedly connected to the fourth connecting portion to drive the second opening 53 to communicate with the smoke inlet of the cigarette holder 2, and the assembly is completed. During cleaning, it is only necessary to twist the filter outer chamber 3 and / or the cigarette holder 1 to drive the third connecting portion and the fourth connecting portion to separate, so that the catalytic inner chamber 5 can be removed from the smoke passage 31, and then the catalytic inner chamber 5 and the catalytic component 4 are disassembled from the second connecting tube 12 in turn, and the components can be cleaned or replaced. After cleaning or replacement, reassembly is completed.

[0043] Embodiment three:

[0044] In this embodiment, a smoking device includes the smoke filter device as described in any of the above embodiments. Optionally, the smoking device includes an electronic cigarette smoking device, a heated cigarette smoking device, and a smoking device for other tobacco products, that is, the smoke filter device can be used to filter the smoke generated by electronic cigarette cartridges, ordinary cigarettes, and other tobacco products. Specifically, the clamping connection part 13 at the smoke inlet of the cigarette holder 1 is connected with the electronic cigarette cartridge / cigarette rod, the butt of an ordinary cigarette, and the pipe for other tobacco products. When the user inhales from the cigarette holder 2, the smoke can be filtered out from the cigarette holder 1. The smoke enters the cigarette holder 1 through the smoke inlet and flows to the cigarette holder 2 through the smoke passage 31, so that the smoke contacts the surface of the catalyst 4 and / or the catalytic inner chamber 5 in the smoke passage 31, driving the components such as alkanes, alkenes, benzene series, aldehydes, acids and polycyclic aromatic hydrocarbons in the smoke to undergo catalytic reaction, thereby filtering out substances such as alkanes, alkenes, benzene series, aldehydes, acids and polycyclic aromatic hydrocarbons in the smoke, thereby effectively reducing the content of harmful components such as tar, nicotine and nitrosamines in the smoke.

[0045] The technical means disclosed in the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A smoke filtering device, characterized in that: include: The cigarette holder and the cigarette holder are arranged in sequence along the direction of smoke flow; A filter outer chamber, the filter outer chamber is arranged between the cigarette holder and the cigarette holder, and a smoke passage is provided inside the filter outer chamber, and the cigarette holder is connected with the cigarette holder through the smoke passage; The catalytic component is assembled in the smoke passage and is arranged in a spiral shape along the smoke flow direction.

2. The smoke filter device according to claim 1, characterized in that: A catalytic inner chamber is also installed in the smoke passage, the catalytic component is installed in the catalytic inner chamber, and a first opening is opened at one end of the catalytic inner chamber close to the cigarette holder, and a second opening is opened at one end of the catalytic inner chamber close to the cigarette holder, the first opening is connected to the smoke outlet of the cigarette holder, and the second opening is connected to the smoke inlet of the cigarette holder.

3. The smoke filtering device according to claim 2, characterized in that: An inner diameter of the first opening is greater than an inner diameter of the second opening.

4. The smoke filtering device according to claim 2, characterized in that: The catalytic element and the catalytic inner chamber are both made of alloy copper.

5. The smoke filtering device according to any one of claims 1 to 4, characterized in that: The cigarette holder and the filter outer chamber are integrally formed, and the smoke outlet of the filter outer chamber is provided with a first connecting part, and the smoke inlet of the cigarette holder is provided with a second connecting part, and the first connecting part and the second connecting part are detachably connected.

6. The smoke filtering device according to any one of claims 2 to 4, characterized in that: The cigarette holder and the filter outer compartment are integrally formed, and the smoke outlet of the cigarette holder extends outward to form a first connecting tube, the first connecting tube is provided with a third connecting part, and the smoke inlet of the filter outer compartment is provided with a fourth connecting part, and the fourth connecting part is detachably connected to the third connecting part.

7. The smoke filtering device according to claim 6, characterized in that: The first connecting tube is provided with a sealing groove, and a sealing ring abutting against the filter outer bin is installed in the sealing groove.

8. The smoke filtering device according to claim 6, characterized in that: The first connecting tube is provided with a second connecting tube extending into the first opening, and one end of the catalytic component is nested in the inner side of the second connecting tube.

9. The smoke filtering device according to claim 1, characterized in that: The smoke inlet of the cigarette holder is provided with a clamping connection portion, and the clamping connection portion is arranged in a stepped shape.

10. A smoking article, characterized in that: It comprises a smoke filtering device as described in any one of claims 1 to 9.

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