Cigarette filter and cigarette

Abstract

The invention provides a cigarette filter tip and a cigarette, air outlet holes are formed in the side part of the periphery of the near lip end of the cigarette filter tip, so that the air outlet holes are positioned in the oral cavity in a smoking state; the near-lip end of the cigarette filter tip is closed or communicated, so that cigarette smoke is filtered by the cigarette filter tip and then enters the front / middle part of an oral cavity only from the air outlet hole in a circumferential diverging manner, or the smoke enters the oral cavity from the end part of the cigarette filter tip and the air outlet hole in a three-dimensional diverging manner. According to the cigarette filter and the cigarette, smoked smoke can preferentially reach the front / middle part of the oral cavity, so that a satisfaction sense is given to consumers, and the problem that the smoking capacity and the smoking frequency are unconsciously changed due to insufficient satisfaction sense of a traditional cigarette is avoided.

Description

Technical Field

[0001] The present invention relates to a cigarette product, in particular to a cigarette filter and a cigarette. Background Art

[0002] With consumers' increasing concern for health and the demand for cigarettes with reduced tar content and harm reduction, low-tar cigarettes have become a major category in cigarette development. However, when smokers smoke low-tar cigarettes, compared to high-tar cigarettes, using the same puffing method, they experience less smoke in their mouths, resulting in lower satisfaction and a poorer low-tar cigarette experience.

[0003] Currently, the design of low-tar cigarettes mainly uses the filter perforation method, which introduces external air into the filter during smoking, providing a dilution effect on the smoke and reducing the amount of tar entering the mouth. However, in order to achieve a certain sense of satisfaction, smokers unconsciously change the puff volume and puff frequency, affecting the tar-reducing effect of low-tar cigarettes [Journal of Yunnan Nationalities University, 2019, 28(02):125-129].

[0004] When smoking existing cigarettes, smoke enters the mouth entirely through the filter tip. Due to the high velocity of smoke entering the mouth, the smoke first reaches the back of the mouth due to inertia, then diffuses to the middle and front of the mouth. Consumers stop smoking after sensing a certain amount of smoke through their oral nerve endings. According to anatomical studies, the density of nerve endings in the front / middle part of the mouth is 3-5 times that of the back [Journal of Oral Rehabilitation, 2018; 45(9): 689-698], making the front / middle part of the mouth more sensitive to smoke.

[0005] Based on the above reasons, how to improve the existing cigarette structure, optimize the way smoke enters the oral cavity, make the smoke reach the front / middle oral cavity more efficient, improve the smoking experience, and avoid the phenomenon of traditional cigarettes unconsciously changing the puffing volume and puffing frequency due to the sense of satisfaction, is a technical problem that technical personnel in this field urgently need to solve.

[0006] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the Invention

[0007] The purpose of the present invention is to address the deficiencies of the prior art and to provide a cigarette filter and cigarette that improves the feeling of smoking satisfaction by opening a hole in the side of the near-lip end of the cigarette filter to allow smoke to enter the front / middle of the mouth from the side, thereby avoiding the phenomenon of traditional cigarettes unconsciously changing the puff volume and puff frequency due to the satisfaction obtained, thereby optimizing the oral experience.

[0008] To achieve the above-mentioned object, the technical solution adopted by the present invention is: a cigarette filter, wherein air outlet holes are provided on the sides of the cigarette filter near the lip so that the air outlet holes are located inside the oral cavity when smoking; The proximal lip end of the cigarette filter is closed so that cigarette smoke, after being filtered by the cigarette filter, only enters the front / middle part of the oral cavity in a circumferentially divergent manner from the air outlet.

[0009] Based on the above, the air outlet holes are distributed at a distance of 1-6 mm from the lip end of the cigarette filter, and the maximum size of the inner holes of the air outlet holes is between 0.4 mm and 1 mm.

[0010] Based on the above, the air outlet holes are arranged in a single-layer annular arrangement, a multi-layer annular arrangement, or an irregularly dispersed arrangement.

[0011] Based on the above, the shape of the air outlet holes is circular, vertical, horizontal, elliptical or diamond-shaped.

[0012] Based on the above, the cigarette filter includes filter material, flow guide member and tipping paper; The flow guide member is a hollow cylindrical structure with a closed proximal lip end, and the side wall of the proximal lip end of the flow guide member is set as a hollow structure; The filter material is fully or partially filled in the flow guiding component; The tipping paper is wound around the flow guide component or the filter material and the outside of the flow guide component, and the air outlet holes communicating with the hollow structure are opened on the tipping paper.

[0013] Based on the above, the cigarette filter includes filter material and tipping paper. The tipping paper is a hollow cylindrical structure with a closed proximal lip end. The filter material is filled in the hollow area of ​​the tipping paper. The air outlet is opened on the sides of the proximal lip end of the tipping paper.

[0014] Based on the above, an air channel is provided in the filter material corresponding to the air outlet hole, and the air outlet passage formed by the air channel and the air outlet hole is inclined toward the proximal lip end or along the circumference or toward both the proximal lip end and the circumference.

[0015] A cigarette filter, wherein the air outlet holes are provided on the sides around the lip end of the cigarette filter so that the air outlet holes are located inside the oral cavity when the cigarette is inhaled; The lip-proximal end of the cigarette filter is through-hole, so that cigarette smoke is filtered by the cigarette filter and enters the oral cavity in a three-dimensional divergent shape from the end of the lip-proximal end and the air outlet holes around it.

[0016] Based on the above, the air outlet holes are distributed at a distance of 1-6 mm from the lip end of the cigarette filter, and the maximum size of the inner holes of the air outlet holes is between 0.4 mm and 1 mm.

[0017] Based on the above, the air outlet holes are arranged in a single-layer annular arrangement, a multi-layer annular arrangement, or an irregularly dispersed arrangement.

[0018] Based on the above, the shape of the air outlet holes is circular, vertical, horizontal, elliptical or diamond-shaped.

[0019] Based on the above, the cigarette filter includes filter material, flow guide member and tipping paper; The flow-guiding member is a through hollow cylindrical structure, and the side wall of the flow-guiding member near the lip end is set as a hollow structure; The filter material is fully or partially filled in the flow guiding component; The tipping paper is wound around the flow guide component or the filter material and the outside of the flow guide component, and the air outlet holes communicating with the hollow structure are opened on the tipping paper.

[0020] Based on the above, the cigarette filter includes filter material and tipping paper. The tipping paper is a through hollow cylindrical structure. The filter material is filled in the tipping paper. The air outlet is provided on the sides of the tipping paper near the lip.

[0021] Based on the above, an air channel is provided in the filter material corresponding to the air outlet hole, and the air outlet passage formed by the air channel and the air outlet hole is inclined toward the proximal lip end or along the circumference or toward both the proximal lip end and the circumference.

[0022] A cigarette comprises a cigarette filter and a tobacco segment, wherein the cigarette filter and the tobacco segment are spliced ​​and rolled to form the cigarette.

[0023] Compared with the existing technology, the present invention has outstanding substantial features and significant progress. Specifically, the present invention is based on the premise that traditional cigarettes have harm reduction measures such as opening air inlet holes in the filter segment to dilute the smoke concentration and reduce the smoke temperature, resulting in a lack of consumer satisfaction, which in turn changes behavioral habits such as puffing capacity and puffing frequency, affecting the tar reduction and harm reduction effects. The second premise is that the smoke diffuses from the back end of the mouth to the middle and front end due to the high inlet flow rate, which does not correspond to the distribution of nerve endings. The path of the smoke during the inhalation process is deeply analyzed and improved. Air outlet holes are opened on the side of the near-lip end of the filter so that after entering the mouth, the smoke either enters the front / middle part of the mouth from the side air outlet holes or enters the interior of the mouth from both the near-lip end and the side. The purpose is to enable the nerve endings distributed in the front or middle part of the mouth to be exposed to a sufficient amount of smoke as early as possible, so that the consumer can get a sense of satisfaction as soon as possible and stop smoking, thereby achieving the purpose of reducing tar and reducing harm while enhancing the sensory experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a basic structural principle diagram of the cigarette filter in Example 1 of the present invention.

[0025] Figure 2 Schematic diagram of the explosion of the cigarette filter in Example 1 of the present invention.

[0026] Figure 3 This is a schematic diagram of the structure of the cigarette filter in Example 1 of the present invention when it is in use.

[0027] Figure 4 This is a flue gas flow image based on Experimental Case 1 in Example 1 of the present invention.

[0028] Figure 5 1 is a schematic diagram of the structure of a cigarette filter in Example 2 of the present invention.

[0029] Figure 6 This is a schematic diagram of the structure of the cigarette filter in Example 2 of the present invention when it is in use.

[0030] Figure 7 This is a flue gas flow image based on Experimental Case 1 in Example 2 of the present invention.

[0031] In the figure: 1. Cigarette filter; 2. Air outlet; 3. Oral cavity; 11. Filter material; 12. Flow guide member; 13. Tipping paper; 14. Hollow structure; 15. Airway; 16. Near-lip end. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0033] Example 1 like Figure 1 As shown, a cigarette filter is provided with air outlet holes 2 on the sides around the lip end of the cigarette filter 1 so that the air outlet holes are located inside the oral cavity when smoking. In this embodiment, the air outlet holes are distributed at a distance of 1-6 mm from the lip end of the cigarette filter, preferably 2-3 mm. The main purpose is to prevent the lips from covering the air outlet holes 2. On the other hand, it can ensure that the smoke can be fully discharged from the air outlet holes 2. The arrangement can be set in the form of a single-layer annular arrangement, a multi-layer annular arrangement, or an irregularly shaped dispersed arrangement. In this embodiment, the maximum inner hole size of the air outlet holes is between 0.4 and 1 mm. Of course, it is not limited to this range in practice. It needs to be matched according to the parameter requirements of the cigarette itself. The hole shape can be selected as a circular hole, a vertical slit, a horizontal slit, an elliptical, or a diamond.

[0034] In this embodiment, the proximal lip end 16 of the cigarette filter 1 is closed so that the cigarette smoke, after being filtered by the cigarette filter 1 , only enters the front / middle part of the oral cavity in a circumferentially divergent manner from the air outlet 2 .

[0035] In this embodiment, Figure 2 As shown, the cigarette filter 1 includes a filter material 11 , a flow guide member 12 and a tipping paper 13 .

[0036] The flow guide member 12 is a hollow cylindrical structure with a closed proximal lip end, and the side wall of the proximal lip end of the flow guide member 12 is configured as a hollow structure 14; The filter material 11 is fully or partially filled in the flow-guiding member 12, that is, in some embodiments, the filter is a two-section structure, the front section is a conventional filter, and the rear section is a structure with a flow-guiding member 12. The main purpose of the flow-guiding member 12 is to cooperate with the punching of the winding paper to form a sufficient airflow path, ensure the gas flow, and avoid too small a flow. The flow-guiding member 12 in this embodiment is relatively small in size; in other embodiments, the flow-guiding member 12 is the same length as the filter, is larger in size, and is simple to assemble, but is more expensive.

[0037] The tipping paper roll 13 is wound around the guide member 12 or the filter material 11 and the guide member 12 . The tipping paper 13 is provided with the air outlet holes 2 communicating with the hollow structure to form a desired cigarette filter.

[0038] In other embodiments, Figure 1 As shown, the cigarette filter includes a filter material 11 and a tipping paper 13. The tipping paper 13 is a hollow cylindrical structure with a closed proximal lip end. The filter material 11 is filled in the hollow area of ​​the tipping paper. The air outlet 2 is opened on the sides of the proximal lip end of the tipping paper.

[0039] In order to control the direction of airflow conduction, an air duct is provided in the filter material 11 corresponding to the air outlet hole 2. The air outlet channel formed by the air duct and the air outlet hole is inclined toward the proximal lip end or along the circumference or at the same time toward the proximal lip end and the circumference, forming a complex flow channel, thereby improving the suction diversity and experience.

[0040] Working principle description: When smoking existing cigarette products, all the smoke enters the mouth from the end face of the filter. Due to the high flow rate of smoke entering the mouth, the smoke first reaches the back end of the mouth due to inertia, and then diffuses to the middle and front end of the mouth. After the consumer senses a certain amount of smoke through the nerve endings in the mouth, he stops smoking.

[0041] However, since the nerve endings of the human mouth are mainly distributed in the middle and front parts of the mouth, there is a time delay in the perception of smoke. This delay is more obvious when smoking low-tar cigarettes. In order to achieve sufficient oral sensation, smokers will inhale a larger volume, affecting the feeling of ease of smoking and increasing the actual smoke intake.

[0042] like Figure 3As shown, when the cigarette of the present invention is smoked, the air outlet is contained in the oral cavity 3. When the smoke passes through, it enters the oral cavity 3 in a circular divergent manner from the air outlet under the action of the negative pressure of the oral cavity, so that different parts of the oral cavity, especially the middle and front parts of the oral cavity with rich nerve endings, can quickly feel the smoke, thereby reducing the smoker's puffing capacity and actual smoke perception.

[0043] The difference between this invention and existing perforated filters is that the holes in existing cigarette filters are designed to allow air to flow inward from the ventilation holes into the filter when the cigarette is smoked, thereby diluting the smoke. The holes are located in the middle of the filter or near the tobacco end to prevent the consumer's lips from covering the filter when inhaling. The perforated filter of the present invention, on the other hand, is located within 6mm of the filter tip. This portion of the filter is held in the mouth during smoking. When the cigarette is inhaled, the smoke flows outward from the filter through the holes, allowing the smoke to diffuse into the mouth and quickly sense the smoke to the rich nerve endings in the middle and front parts of the mouth. Compared with existing perforated filters, the airflow through the holes is in the opposite direction, and the perforations have a different effect on the flow of cigarette smoke and the smoking experience, thus achieving the purpose of the present invention.

[0044] On the one hand, this invention allows cigarette consumers to experience smoke more quickly and fully in their mouths when smoking cigarettes, shortening the puffing process and actual smoke intake, thereby reducing health risks. On the other hand, it allows for the design of lower-tar cigarettes while ensuring a good smoking experience for consumers, thereby increasing their acceptance of low-tar cigarettes. In actual sample puffs, smokers also noticed an improvement in the smoothness and aroma of the smoke.

[0045] Experimental Example 1 The designed guide structure is 8mm in length and 17mm in circumference. The bottom of the barrel is closed, and there is a fence structure 1.2-4mm away from the bottom of the barrel. There are 4 fences, and the width of each fence is about 1mm. Two rows of holes are evenly punched vertically around the circumference of the filter at a distance of 1.5mm and 3mm from the end of the tipping paper, with 6 holes in each row and a hole diameter of about 0.5mm. Sample cigarettes are made using this filter. In order to observe the flow of smoke when the cigarette is smoked, the cigarette is inserted into the glass tube through a sealing knot, and the cigarette is smoked at the other end of the glass tube. The flow direction of the smoke during smoking is recorded. The results are shown in Figure 4 When a conventional control filter cigarette is smoked, the cigarette smoke flows backward from the cigarette filter end to form a smoke column ( Figure 4 (A)); and when the filter cigarette of the present invention is smoked ( Figure 4 (B) ), the cigarette smoke appears as a diffused smoke. This result verifies that the filter structure design of the present invention can change the state of smoke entering the oral cavity.

[0046] Experimental Example 2 The cigarettes of Example 1 were selected, and the filter tips were cut off 3 mm from the distal end to obtain cigarettes without a flow-guiding structure. Five volunteers were recruited to smoke the cigarettes before and after the flow-guiding structure was removed. The smokers' oral smoke exposure was assessed using a filter analysis method (Cai Junlan, Peng Bin, Wang Bing, et al. Evaluating Smokers' Oral Smoke Exposure Using a Filter Analysis Method [C] / / 2016 Excellent Papers of the China Tobacco Society - Tobacco Industry Theme. Zhengzhou Tobacco Research Institute, China National Tobacco Corporation; 2016: 216-235.). The results are shown in Table 1.

[0047] Table 1 Oral smoke exposure of smokers (mg / cigarette)

[0048] Table 1 shows a significant difference in oral smoke exposure between smokers smoking the two cigarettes (p < 0.001). When smoking the cigarette without a diversion mechanism, the average oral tar exposure was approximately 6.84 mg / cigarette. When smoking the cigarette with the diversion mechanism of the present invention, the average oral tar exposure was approximately 5.98 mg / cigarette, a decrease of approximately 13%. This indicates that the present invention can indeed reduce actual smoke intake.

[0049] Experimental Example 3: The design of the diversion structure is 10 mm long and 20 mm in circumference, with a closed bottom and a fence-like structure 2-5 mm from the bottom. The fences consist of four strips, each approximately 1 mm wide. The cigarette filter section is a 20 mm long paper filter rod. The tipping paper is perforated with eight holes, each approximately 1.0 mm in diameter, vertically and evenly perforated around the circumference of the filter, 2.5 mm from the end. Sample cigarettes were made using this filter. The filter tip was then cut off 3 mm from the end to produce a cigarette without a diversion feature. Tar release was measured before and after perforation using a conventional analytical smoking machine according to GBT 19609-2004 for the determination of total particulate matter and tar in cigarettes. The control sample released 4.34 mg of tar per cigarette, while the cigarette using the filter structure of the present invention released 4.38 mg of tar per cigarette, showing no significant difference.

[0050] Seven smokers smoked cigarettes before and after perforation to evaluate their sensory quality. The scores for each indicator are shown in Table 2. It can be seen that the filter structure designed using the present invention significantly improved smoke concentration and aroma volume scores, while maintaining similar levels of aroma quality, pungency, and aftertaste.

[0051] Table 2 Sensory evaluation of cigarettes sample Flue gas concentration Fragrance Aroma volume Irritation Aftertaste Cigarettes without diversion structure 7.2 7.9 7.0 7.8 8.0 Cigarettes with diversion structures 8.3 8.1 8.2 7.9 8.1 Example 2 like Figure 5 As shown, a cigarette filter, the cigarette filter 1 is provided with the air outlet 2 on the sides around the lip end, so that the air outlet 2 is located inside the oral cavity when smoking; The proximal lip end of the cigarette filter 1 is through-hole so that cigarette smoke, after being filtered by the cigarette filter, enters the oral cavity in a three-dimensional divergent manner from the end of the proximal lip end and the air outlet holes around it. That is to say, this embodiment is based on the traditional cigarette filter, and the air outlet holes 2 are opened on the sides around the proximal lip end.

[0052] The parameters thereof may refer to the parameters of the air outlet 2 in Example 1.

[0053] In some embodiments, as Figure 5 As shown, the cigarette filter 1 includes a filter material 11 and a tipping paper 13, which is the structure of a conventional cigarette filter. The tipping paper is a through hollow cylindrical structure, and the filter material is filled in the tipping paper. The air outlet 2 is opened on the side around the lip end of the tipping paper.

[0054] In order to enrich the form of the air flow path, an air channel 15 is set in the filter material 11 corresponding to the air outlet hole. The air outlet channel formed by the air channel and the air outlet hole is inclined toward the proximal lip end or along the circumference or toward the proximal lip end and the circumference at the same time.

[0055] In other embodiments, the cigarette filter includes a filter material, a flow-guiding member, and a tipping paper.

[0056] The flow guide member is a through hollow cylindrical structure, and the side wall of the flow guide member near the lip end is set as a hollow structure. Figure 2 , just open the proximal lip end of the guide member The filter material is fully or partially filled in the flow guiding component; The tipping paper is wound around the flow guide component or the filter material and the outside of the flow guide component, and the air outlet holes communicating with the hollow structure are opened on the tipping paper.

[0057] like Figure 6 As shown, the main difference between this embodiment and embodiment 1 in terms of working principle is that: when the cigarette is smoked, the filter tip where the air outlet is located is contained in the oral cavity. When the smoke passes through, it enters the oral cavity in a spatially dispersed manner from the air outlet and the end of the cigarette under the action of the negative pressure in the oral cavity, making it easier for consumers to capture the smoke and reducing the depth of inhalation, thereby achieving a better smoking experience with a lower tar release amount and reducing the actual smoke intake of consumers.

[0058] In specific applications, the diversion ratio of smoke from the holes can be adjusted through different settings such as the hole position, hole size, number, and number of rows to achieve different sensory optimization effects.

[0059] Experimental Example 1: A commercially available low-tar slim cigarette with a tar release of 5 mg on the box label was selected. The comprehensive cigarette test bench was used to determine that the filter ventilation rate was 48%, and there were two rows of ventilation and dilution holes, located 1.8 mm and 1.95 mm from the mouth end. A mechanical punching method was used to evenly punch 8 holes around the circumference of the filter at a distance of 3 mm from the mouth end, with a hole diameter of approximately 0.5 mm. In order to observe the flow of smoke during cigarette smoking, the cigarette was inserted into a glass tube through a sealing knot, and the cigarette was smoked at the other end of the glass tube. The flow direction of the smoke during smoking was recorded. The results are shown in Figure 2. Figure 7 When a non-perforated cigarette is smoked, the smoke flows backward from the end of the cigarette filter, forming a smoke column ( Figure 7 (A)); and when smoking a punched cigarette ( Figure 7 (B) In addition to the backward flow from the filter tip, cigarette smoke can be observed to flow laterally from the perforations, forming a diverging smoke pattern at the mouth end. This result confirms that the filter structure design with perforations at the mouth end can guide the lateral flow of smoke at the filter tip.

[0060] Experimental Example 2: A commercially available low-tar slim cigarette with a packaged tar yield of 3 mg was selected. Using a comprehensive cigarette testing bench, the filter had a ventilation rate of 60% and two rows of ventilation and dilution holes, located 1.6 mm and 1.8 mm from the mouth end. Laser perforation was used to create two rows of holes perpendicularly and evenly distributed around the filter circumference at positions 3 mm and 4 mm from the mouth end, with 10 holes per row and a hole diameter of approximately 0.3 mm. Five volunteers smoked the cigarettes before and after perforation. The smokers' oral smoke exposure was assessed using a filter analysis method (Cai Junlan, Peng Bin, Wang Bing, et al. "Evaluating Smokers' Oral Smoke Exposure Using a Filter Analysis Method" [C] / / Collection of Outstanding Papers of the China Tobacco Society in 2016 - Tobacco Industry Theme. Zhengzhou Tobacco Research Institute of China National Tobacco Corporation; 2016: 216-235). The results are shown in Table 3.

[0061] Table 3 Oral smoke exposure of smokers (mg / cigarette)

[0062] Table 3 shows a significant difference in oral smoke exposure between the two cigarettes (p<0.001). When smoking the control cigarette, the average oral tar exposure was approximately 3.4 mg / cigarette. When smoking the mouth-perforated cigarette of the present invention, the average oral tar exposure was approximately 3.1 mg / cigarette, a decrease of approximately 10%. This indicates that the present invention can indeed reduce actual smoke intake.

[0063] Experimental Example 3: A commercially available low-tar slim cigarette with a package-labeled tar yield of 3 mg was selected. Using a comprehensive cigarette testing bench, the filter ventilation rate was determined to be 60%. The filter had two rows of ventilation and dilution holes, located 1.6 mm and 1.8 mm from the mouth end. Fourteen holes with a diameter of approximately 0.4 mm were laser-drilled vertically and evenly around the filter circumference, 3 mm from the mouth end.

[0064] The tar release of cigarettes before and after perforation was measured using the "GBT 19609-2004 Conventional Analytical Smoking Machine for Determination of Total Particulate Matter and Tar in Cigarettes." The tar release of the control sample was 3.52 mg / cigarette, while the tar release of the cigarettes using the filter structure of the present invention was 3.57 mg / cigarette, showing no significant difference.

[0065] Seven smokers smoked the cigarettes before and after perforation to evaluate their sensory quality. The scores for each indicator are shown in Table 4. It can be seen that the filter structure designed using the present invention significantly improved smoke concentration and aroma volume scores, while maintaining minimal differences in aroma quality, pungency, and aftertaste.

[0066] Table 4 Sensory evaluation of cigarettes serial number Flue gas concentration Fragrance Aroma volume Irritation Aftertaste 1# (as is) 6.2 8.2 6.7 8.6 8.0 2# (test sample) 7.9 8.3 7.9 8.5 8.1 Example 3 A cigarette comprises a cigarette filter and a tobacco segment, wherein the cigarette filter and the tobacco segment are spliced ​​and rolled to form the cigarette.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution 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 field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention. They should all be included in the scope of the technical solution for protection of the present invention.

Claims

1. A cigarette filter, characterized in that: The cigarette filter is provided with air outlet holes on the sides around the lip end, so that the air outlet holes are located inside the oral cavity when smoking; The proximal lip end of the cigarette filter is closed so that cigarette smoke, after being filtered by the cigarette filter, only enters the front / middle part of the oral cavity in a circumferentially divergent manner from the air outlet.

2. The cigarette filter according to claim 1, characterized in that: The air outlet holes are distributed at a distance of 1-6 mm from the lip end of the cigarette filter, and the maximum size of the inner holes of the air outlet holes is between 0.4 mm and 1 mm.

3. The cigarette filter according to claim 1 or 2, characterized in that: The air outlet holes are arranged in a single-layer annular arrangement, a multi-layer annular arrangement, or an irregularly-shaped dispersed arrangement.

4. The cigarette filter according to claim 1 or 2, characterized in that: The shape of the air outlet holes is circular, vertical, horizontal, elliptical or diamond.

5. The cigarette filter according to claim 1 or 2, characterized in that: The cigarette filter comprises filter material, flow guide member and tipping paper; The flow guide member is a hollow cylindrical structure with a closed proximal lip end, and the side wall of the proximal lip end of the flow guide member is set as a hollow structure; The filter material is fully or partially filled in the flow guiding component; The tipping paper is wound around the flow guide component or the filter material and the outside of the flow guide component, and the air outlet holes communicating with the hollow structure are opened on the tipping paper.

6. The cigarette filter according to claim 1 or 2, characterized in that: The cigarette filter includes filter material and tipping paper. The tipping paper is a hollow cylindrical structure with a closed proximal lip end. The filter material is filled in the hollow area of ​​the tipping paper. The air outlet is provided on the sides of the proximal lip end of the tipping paper.

7. The cigarette filter according to claim 6, characterized in that: An air channel communicating with the air outlet holes is provided in the filter material, and the air outlet passage formed by the air channel and the air outlet holes is inclined toward the proximal lip end or along the circumferential direction or toward both the proximal lip end and the circumferential direction.

8. A cigarette filter, characterized in that: The air outlet holes are provided on the sides of the cigarette filter near the lip end so that the air outlet holes are located inside the oral cavity when the cigarette is inhaled. The lip-proximal end of the cigarette filter is through-hole, so that cigarette smoke is filtered by the cigarette filter and enters the oral cavity in a three-dimensional divergent shape from the end of the lip-proximal end and the air outlet holes around it.

9. The cigarette filter according to claim 1, characterized in that: The air outlet holes are distributed at a distance of 1-6 mm from the lip end of the cigarette filter, and the maximum size of the inner holes of the air outlet holes is between 0.4 mm and 1 mm.

10. The cigarette filter according to claim 8 or 9, characterized in that: The air outlet holes are arranged in a single-layer annular arrangement, a multi-layer annular arrangement, or an irregularly-shaped dispersed arrangement.

11. The cigarette filter according to claim 8 or 9, characterized in that: The shape of the air outlet holes is circular, vertical, horizontal, elliptical or diamond.

12. The cigarette filter according to claim 8 or 9, characterized in that: The cigarette filter comprises filter material, flow guide member and tipping paper; The flow-guiding member is a through hollow cylindrical structure, and the side wall of the flow-guiding member near the lip end is set as a hollow structure; The filter material is fully or partially filled in the flow guiding component; The tipping paper is wound around the flow guide component or the filter material and the outside of the flow guide component, and the air outlet holes communicating with the hollow structure are opened on the tipping paper.

13. The cigarette filter according to claim 8 or 9, characterized in that: The cigarette filter comprises filter material and tipping paper. The tipping paper is a through hollow cylindrical structure. The filter material is filled in the tipping paper. The air outlet is provided on the sides around the lip end of the tipping paper.

14. The cigarette filter according to claim 13, characterized in that: An air channel communicating with the air outlet holes is provided in the filter material, and the air outlet passage formed by the air channel and the air outlet holes is inclined toward the proximal lip end or along the circumferential direction or toward both the proximal lip end and the circumferential direction.

15. A cigarette, characterized in that: The cigarette filter and tobacco segment are comprised of the cigarette filter and tobacco segment according to any one of claims 1 to 14, wherein the cigarette filter and tobacco segment are spliced ​​and rolled to form a cigarette.

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