Hourglass filter stick for cigarette and cigarette

Abstract

The utility model discloses a cigarette sandglass filter stick and cigarette, the cigarette sandglass filter stick includes: a filter stick body including a first stick section, the first stick section includes a sandglass-shaped channel, the sandglass-shaped channel includes a first through hole and a second through hole communicated with the first through hole, the first through hole and the second through hole are sequentially arranged along a first direction; the through-flow area of the first through hole is gradually reduced in the first direction, and the through-flow area of the second through hole is gradually increased in the first direction; and the forming paper wraps the filter stick body from the outer side of the filter stick body.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of tobacco products, especially a cigarette sandglass filter rod and cigarette. BACKGROUND

[0002] Tar in cigarette smoke is harmful to human body, and attaching a filter tip to a cigarette can effectively reduce tar and other harmful components. A filter rod is a rod body with filtering performance and a certain length, which is processed and rolled by using filtering material as raw material, and the filter tip attached to the smoking end of a cigarette after the filter rod is cut is a filter tip. The filter tip plays a filtering role on certain substances in cigarette smoke, such as tar and nicotine, and has a cooling and flow guiding effect on smoke, and is a component of filter tip cigarettes. Specifically, the filtering of particulate matter by the filter rod is mechanical filtering, and the mechanism of causing smoke particle filtering mainly includes direct interception, inertial collision and diffusion deposition. The advantages of filter tip cigarettes avoid the discomfort caused by tobacco tar sticking to the lips, reduce harmful substances in smoke, and can provide appropriate temperature and taste of smoke to consumers, so they are quickly accepted by consumers. SUMMARY

[0003] The utility model discloses a kind of sandglass filter rods for cigarettes and cigarette formed by using the sandglass filter rod for cigarettes, which can improve the taste of smoke after forming filter tip.

[0004] The utility model discloses a kind of sandglass filter rods for cigarettes, comprising:

[0005] The filter rod body comprises a first rod segment, the first rod segment comprises a sandglass-shaped channel, the sandglass-shaped channel comprises a first through hole and a second through hole communicated with the first through hole arranged in sequence along a first direction, the first through hole gradually reduces in flow area along the first direction, and the second through hole gradually increases in flow area along the first direction.

[0006] The forming paper wraps the filter rod body from the outside of the filter rod body.

[0007] In some embodiments, the first through hole and / or the second through hole are a revolution body structure formed by a generatrix revolving around an axis.

[0008] In some embodiments, the first through hole and the second through hole are of the same shape.

[0009] In some embodiments, the generatrix is an arc line.

[0010] In some embodiments, the sandglass-shaped channel further comprises a third through hole connected between the first through hole and the second through hole, and the third through hole is a cylindrical through hole extending along the first direction.

[0011] In some embodiments, the first through hole has an area that is 50 times or more than the area of the cross section of the cylindrical through hole.

[0012] In some embodiments, the filter rod body further comprises a second rod segment arranged upstream of the first rod segment along the first direction, and the second rod segment is a cylindrical structure.

[0013] In some embodiments, the first rod body comprises a plurality of hourglass-shaped channels, and the plurality of hourglass-shaped channels are distributed along a circumferential direction around an axis of the first rod body.

[0014] In some embodiments, the first rod body further comprises one hourglass-shaped channel at a middle portion of a cross section thereof, and the plurality of hourglass-shaped channels are distributed around the one hourglass-shaped channel at the middle portion.

[0015] In some embodiments, the plurality of hourglass-shaped channels are uniformly distributed along a circumferential direction around an axis of the first rod body.

[0016] The second aspect of the utility model discloses a cigarette, including filter tip, the filter tip includes the cigarette of any described hourglass-shaped filter rod cut and form the suction segment.

[0017] When the cigarette is applied, the cigarette of the utility model is provided with the hourglass-shaped channel comprising the first through hole and the second through hole communicated with the first through hole arranged in sequence along the first direction, the flow area of the first through hole gradually reduces along the first direction, the flow area of the second through hole gradually increases along the first direction, when the smoke flows along the hourglass-shaped channel, the smoke first passes through the first through hole to accelerate and reduce pressure, then flows out of the first through hole and enters the second through hole with gradually increasing flow area, the second through hole can make the smoke with large flow rate cause large disturbance, so that the heat transfer efficiency of the smoke and the surface of the channel is improved, the cooling effect of the smoke is further improved, along with the flow along the second through hole, the smoke speed increases and the pressure increases, the smoke can flow to the consumer more uniformly and more safely, and the suction safety and taste of the smoke are improved.

[0018] Other features of the utility model and its advantages will become clear from the following detailed description of exemplary embodiments thereof with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings described herein are used to provide further understanding of the utility model, and form part of the present application, and the schematic embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model.

[0020] Figure 1 It is a sectional view of the cigarette of the utility model embodiment.

[0021] Figure 2 As Figure 1 A partial structure schematic view of the sandglass filter rod for cigarettes shown in Figure 1;

[0022] Figure 3 A cross-sectional structure schematic view of the sandglass filter rod for cigarettes of another embodiment of the present utility model;

[0023] Figure 4 As Figure 3 A partial structure schematic view of the sandglass filter rod for cigarettes shown in Figure 1;

[0024] Figure 5 A partial structure schematic view of the sandglass filter rod for cigarettes of another embodiment of the present utility model. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present utility model will be apparently and completely described in combination with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. The description of the at least one exemplary embodiment is only illustrative in nature and by no means as any limitation to the present utility model and its application or use. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without any creative labor fall within the scope of protection of the present utility model.

[0026] Unless otherwise specifically stated, the relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the various examples are not intended to limit the scope of the present utility model. It is to be understood that the drawings are not to scale as the dimensions of the individual parts are exaggerated or reduced for the purpose of clarity and presentation. Any technical, method, and equipment known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the specification under appropriate circumstances. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0027] In the description of the present utility model, it should be understood that the use of the words "first", "second", and the like to describe components is merely for the convenience of distinguishing the corresponding components, and the above words have no special meaning unless otherwise stated. Therefore, it should not be understood as a limitation to the scope of protection of the present utility model.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0030] like Figures 1 to 5 As shown, the cigarette hourglass filter rod of this embodiment includes a filter rod body and a forming paper 3.

[0031] The filter rod body includes a first rod segment 1, which includes an hourglass-shaped channel 11. The hourglass-shaped channel 11 includes a first through hole 111 and a second through hole 112 connected to the first through hole 111, arranged sequentially along a first direction. The flow area of ​​the first through hole 111 gradually decreases along the first direction, while the flow area of ​​the second through hole 112 gradually increases along the first direction. The first direction is the direction along the axis of the filter rod body from one end to the other. Specifically, in the embodiment shown in the figure, it is the direction along the axis of the first rod segment from the part of the first rod segment away from the mouth of the inhaler to the part closer to the mouth of the inhaler (taking the position of the first rod segment in the filter nozzle and the position when the inhaler uses it as a reference). In the embodiment shown in the figure, the first segment can be manufactured as follows: The first segment 1 is made of cellulose acetate tow, which is opened and then subjected to triacetin in an atomization chamber. It is then shaped in a mold using high-temperature steam. The mold is a mandrel that forms an hourglass-shaped channel. During the high-temperature steam forming process, a mechanism drives the mandrel to reciprocate back and forth, while the first segment moves along its axis. This relative motion forms a variable-diameter hourglass-shaped channel within the first segment. The reciprocating speed of the mandrel can be adjusted to achieve different rates of change in aperture size.

[0032] The forming paper 3 wraps the filter rod body from the outside of the filter rod body. The forming paper 3 is used for filter rod forming and prevents smoke passing through the filter rod body from flowing outwards along the radial direction.

[0033] The sandglass filter rod for cigarettes of the present embodiment, when applied to a cigarette, by providing the sandglass-shaped passage 11 including the first through hole 111 and the second through hole 112 arranged in sequence along the first direction, and the first through hole 111 gradually decreasing in flow area along the first direction and the second through hole 112 gradually increasing in flow area along the first direction, when the smoke flows along the sandglass-shaped passage 11, the smoke first passes through the first through hole 111 to accelerate and reduce pressure, and then flows out of the first through hole 111 and into the second through hole 112 which gradually increases in flow area, the second through hole 112 can cause the smoke with a larger flow rate to cause greater turbulence, so that the heat transfer efficiency between the smoke and the surface of the passage is improved, further improving the cooling effect of the smoke, and as the smoke flows along the second through hole 112, the smoke speed increases and the pressure increases, the smoke can flow more uniformly and more safely to the consumer, improving the smoking safety and taste of the smoke.

[0034] In some embodiments, as shown in the figure, the first through hole 111 and / or the second through hole 112 is a revolution body structure formed by a generatrix revolving around an axis. In some embodiments, the generatrix is an arc. In the embodiments shown in the figure, the first through hole 111 and the second through hole 112 are conical through holes, i.e. revolution body structures formed by an arc-shaped generatrix revolving around an axis. By providing the first through hole 111 and / or the second through hole 112 as a revolution body structure, the present embodiment can make the flow of smoke more uniform, improve the smoking taste of the smoke, and the sandglass filter rod for cigarettes is easier to produce.

[0035] In some embodiments, the first through hole 111 and the second through hole 112 are the same shape. The sandglass filter rod for cigarettes of the present embodiment is easier to produce.

[0036] In some embodiments, as shown in the figure, the sandglass-shaped passage 11 further includes a third through hole 113 connected between the first through hole 111 and the second through hole 112, and the third through hole 113 is a cylindrical through hole extending along the first direction. As shown in the figure, the third through hole 113 is a cylindrical through hole. By providing the third through hole 113 and setting the third through hole as a cylindrical through hole, the third through hole can regulate the smoke with increased speed after the smoke accelerates through the first through hole, so that when the smoke enters the second through hole, a better turbulence effect can be achieved, further improving the cooling effect of the smoke.

[0037] In some embodiments, the area of the end face of the first through hole 111 away from the third through hole 113 is 50 times or more than the cross-sectional area of the cylindrical through hole. That is, the maximum flow area of the first through hole 111 is 50 times or more than the cross-sectional area of the cylindrical through hole. This arrangement can effectively reduce the pressure and increase the speed of the flue gas when passing through the first through hole, thereby improving the cooling effect of the flue gas.

[0038] In some embodiments, as shown in Figures 1 to 3 The filter rod body further includes a second rod segment 2 upstream of the first rod segment 1 in the first direction, and the second rod segment 2 is a cylindrical structure. The second rod segment 2 is a filter segment with a filtering effect, such as an acetate filter rod, a blasting bead filter rod, a paper filter rod, or a tobacco thread filter rod. After forming the filter, the flue gas first passes through the second rod segment for effective filtration, and then enters the first rod segment for effective cooling, thereby effectively filtering and cooling the flue gas, allowing the flue gas to flow more safely to the consumer, and improving the safety and taste of the flue gas.

[0039] In some embodiments, as shown in Figures 3 to 5 The first rod body includes a plurality of hourglass-shaped channels 11 distributed in the circumferential direction around the axis of the first rod body. The plurality of hourglass-shaped channels 11 can further increase the contact area between the flue gas and the channel wall, improve the cooling effect of the hourglass-shaped channels 11 on the flue gas, and further improve the safety and taste of the flue gas.

[0040] In some embodiments, as shown in Figure 5 The first rod body further includes an hourglass-shaped channel 11 at the middle of its cross section, and a plurality of hourglass-shaped channels 11 are distributed around the middle hourglass-shaped channel 11 in the circumferential direction around the axis of the first rod body. The hourglass-shaped channels 11 in this embodiment are arranged more closely, further improving the cooling effect on the flue gas.

[0041] In some embodiments, the plurality of hourglass-shaped channels 11 are uniformly distributed in the circumferential direction around the axis of the first rod body. This embodiment can improve the cooling effect on the flue gas while improving the uniformity of the flue gas flow.

[0042] In some embodiments, a cigarette is also disclosed, which includes a filter, and the filter includes a smoking segment cut from any of the above-mentioned hourglass-shaped filter rods for cigarettes.

[0043] In some embodiments, the filter is arranged at the free end of the cigarette.

[0044] It should be noted that the above examples are used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, all of them should be covered in the technical solution range of the present application claimed.

Claims

1. A sandglass filter for a cigarette, characterized by comprising: The application relates to a filter rod body, comprising a first rod segment, wherein the first rod segment comprises a sandglass-shaped channel, the sandglass-shaped channel comprises a first through hole and a second through hole which are arranged in sequence along a first direction, the first through hole gradually decreases in flow area along the first direction, and the second through hole gradually increases in flow area along the first direction; and a forming paper which is wrapped around the filter rod body from the outside of the filter rod body. The first through hole and / or the second through hole are a rotary body structure formed by rotating a generatrix around an axis. The first through hole and the second through hole are of the same shape.

2. The sandglass filter for a cigarette according to claim 1, wherein The generatrix is an arc line.

3. The sandglass filter for a cigarette according to claim 2, wherein The sandglass-shaped channel further comprises a third through hole which is connected between the first through hole and the second through hole, and the third through hole is a cylindrical through hole which extends along the first direction.

4. The sandglass filter for a cigarette according to claim 2, wherein The area of the end face of the first through hole away from the third through hole is 50 times or more of the cross-sectional area of the cylindrical through hole.

5. The sandglass filter for a cigarette according to claim 1, wherein The filter rod body further comprises a second rod segment which is arranged upstream of the first rod segment along the first direction, and the second rod segment is a cylindrical structure.

6. The sandglass filter for a cigarette according to claim 5, wherein The first rod segment comprises a plurality of sandglass-shaped channels which are distributed along a circumferential direction around the axis of the first rod segment.

7. The sandglass filter for a cigarette according to claim 1, wherein The first rod segment further comprises one sandglass-shaped channel which is located in the middle of the cross section thereof, and the plurality of sandglass-shaped channels are distributed around the sandglass-shaped channel in the middle along the circumferential direction around the axis of the first rod segment.

8. The sandglass filter for a cigarette according to any one of claims 1 to 7, wherein The plurality of sandglass-shaped channels are uniformly distributed along the circumferential direction around the axis of the first rod segment.

9. The sandglass filter for a cigarette according to claim 8, wherein The filter rod body comprises a smoking segment which is cut from the sandglass-shaped filter rod for cigarettes according to any one of claims 1-10.

10. The sandglass filter for a cigarette according to claim 9, wherein ​ 11. A cigarette comprising a filter, characterised in that, ​

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