JP2018069046A - Straw having diffusion function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems in which, when one sucks hot coffee having high temperature with a normal straw, due to heat of the sucked coffee, one scalds himself/herself on a throat since a throat is sensitive to heat, and when one sucks juice with a normal straw, one cannot fully enjoy a taste of juice on taste buds distributed on a tongue until the juice passes through the throat.SOLUTION: When one sucks beverage with a straw of the invention having a diffusion function, the sucked liquid is jetted from a suction hole 14 and collides to a diffusion part 13, and therefore the liquid is scattered in all direction except for a throat direction. Therefore, when one drinks hot coffee, one can be prevented from scalding himself/herself on a throat, and one can drink hot coffee without discomfort to heat. When one drinks juice, since the sucked juice is scattered in whole area of a tongue, the juice contacts taste buds distributed on the tongue in an almost uniform state, and when the juice passes through the throat, the juice contacts the taste buds distributed on the throat, so that one can fully enjoy a taste of the juice.SELECTED DRAWING: Figure 1

Description

The present invention relates to a straw used when a person drinks coffee, juice or the like from a container such as a cup.

For drinking and drinking beverages such as juice, a straight body straw 41 shown in FIG. 10 and a bent straw 42 having a bendable bellows 43 are used. The straight body straw 41 is a straight cylinder straw having a circular cross section created by extrusion molding of polypropylene or the like, and is most commonly an outer diameter of about 6 mm. The bending straw 42 is provided with a bellows 43 on a part of the straight body straw 41, and when used, the bellows can be bent and adjusted to an angle at which it is easy to eat and drink.

In general, it is said that people perceive taste with miso. FIG. 7 is an explanatory diagram of the distribution of intraoral miso that schematically illustrates the inside of a human oral cavity. The oral cavity 30 includes an upper jaw 35, a lower jaw 36, a lip 37, a right cheek 32, a left cheek 33, a tongue 31, and a throat 34, and miso 38 a to 38 e exist on the tongue 31 and the throat 34. Further, it is known that about 2/3 of the miso is present in the tongue 31, and the remaining 1/3 is present in the throat 34 (more precisely, the throat cranium, soft palate, throat head) located in the back of the mouth. . Further, the miso present on the tongue is distributed on the tongue tip 38a, the right side surface 38b, the left side surface 38c, and the back side 38d of the tongue, and no miso exists in the center of the tongue 31.
It can be said that the act of a person tasting the taste of coffee or juice in the mouth is the action of bringing these beverages into contact with the miso 38a to 38d present on the tongue.

  FIG. 14 shows a state in which a person eating and drinking sucks the liquid beverage 47 in the cup 45 by inserting the upper end of the bent straw 42 into the oral cavity. Since the shape of the suction portion 44 of the bending straw 42 to be sucked is a simple circular shape obtained by cutting a cylinder, the liquid beverage sucked by the straw is sucked in the direction of the arrow and only slightly contacts the upper jaw 35, so that the tongue tip 38a, It is attracted directly to the throat 34 without contact with the miso distributed on the right side surface 38b and the left side surface 38c of the tongue. That is, the person who eats and drinks eats and drinks these drinks sufficiently. On the other hand, Document 1 discloses an invention of a straw in which liquid sucked into a tube body is not jetted vigorously toward the throat directly in the oral cavity. 11 and 12 show the configuration of the straw disclosed as the invention of Document 1. FIG. FIG. 11 shows a straw in which the end surface of the straw tube body is closed by a seal portion 19 and an opening hole 17 is provided on the side surface. The liquid is ejected in a direction perpendicular to the opening hole 17 and is not directly sucked into the throat.

Further, in FIG. 12, the opening 18 provided on the side is not a simple hole, but a guide is also provided in the straw, and the structure has a circulation port from the inside of the tube body to the outside. In this case as well, the liquid is ejected in a direction perpendicular to the opening 18, so that it is not directly sucked into the throat. However, in these inventions of FIGS. 11 and 12, the injecting direction of the sucked beverage is only a specific direction, and it is difficult to uniformly contact all of the miso 38a to 38c distributed on the tongue. It is.

JP2004-24408

When cold drinks such as juice are served in cups of glass, plastic, paper, etc., eating and drinking with the lips directly in contact with the container jar is not necessarily considered a manner of behavior that fulfills manners. Using straws is smart and common. However, it is difficult to use a straw for eating and drinking hot coffee. The reason is that when hot hot coffee is sucked with a straw, the sucked coffee hits the heat-sensitive throat directly. Usually, the suction operation is interrupted by a human rejection reaction that occurs reflexively, but if the suction operation is not completed in time and the suction is accidentally performed, the throat is burned.

Therefore, when eating or drinking hot coffee in a cup provided at convenience stores, fast food stores, in-car sales, etc., the eater directly touches the lips with the container lid and pours them into the oral cavity little by little with the lips and the tip of the tongue to allow sufficient cooling. After that, it naturally moves to the esophagus. The suction port of the container lid has been devised in shape to make it easier for a person to inhale with the tip of the mouth, but it is clear that it is difficult to drink compared to the operation of suction using a straw.

In the invention of Cited Document 1, the end face of the straw is sealed for the purpose of enjoying the taste of the beverage, an opening is provided on the side face, and the injection direction into the oral cavity is guided in a direction other than the length direction of the straw. ing. However, even with a straw having this structure, hot coffee is concentrated and sprayed at a specific location in the oral cavity, so that the heat is not relieved and it is difficult to eat and drink hot coffee. In addition, even when eating and drinking juices with the straws of Cited Document 1, the sucked beverage is sprayed only in a specific direction, so contact with the oral miso is insufficient, and it is difficult to fully taste the taste of the juice .

Invention of Claim 1 is a straw of the cylinder used when eating and drinking liquid drinks, such as hot coffee and cooled juice. A flat plate-like diffusion portion is provided at one end of the cylindrical body. The diffusion part may be formed into a flat plate by heat-pressing the end portion of the cylindrical body, or may be formed as a flat plate by integrally molding the same thermosoftening resin material as that of the cylindrical body.
The diffusion part is molded by being refracted by 90 degrees or more so as to face the cylinder with the boundary with the cylinder as a fold. The refraction angle at this time is adjusted in the range of 90 degrees to 180 degrees. Therefore, the diffusing portion covers a part of the cylinder and is refracted so as to face the cylinder. In addition, a suction hole communicating with the inside of the cylinder is provided on the surface of the cylinder covered with the diffusion part (a surface facing the diffusion part).
According to the present invention, when a person inserts the straw into the oral cavity and sucks the liquid drink, the liquid drink is sucked from the suction hole, is uniformly scattered by the diffusion portion, and is sprayed to the entire region of the tongue.

The invention according to claim 2 is a shape formed by chamfering the tip of the diffusion portion by heat press or a shape designed also for chamfering. When the cylinder is heat-pressed in a flat shape, the heat-pressed part becomes rectangular and corners are formed, but by using a chamfered heat-press plate and various-shaped heat-press plates, it can be easily made into the desired shape. Can be molded.

According to the present invention, at least the corners of the diffusing portion are chamfered and disappear, so that when used by being inserted into the oral cavity, the oral cavity is not damaged by the corners of the diffusing portion. In addition, the diffusion portion can be designed in various shapes rather than a simple plane because the diffusion direction of the liquid is controlled. Furthermore, the diffusion section can be designed in various ways, such as animal faces, flowers, Mt. Fuji, and anime characters, and can also increase the product value of the straw by attracting the interest of children and adults.

In the invention according to claim 3, since the linear groove or the linear protrusion is provided on the surface of the diffusing portion facing the cylindrical body, the beverage sucked from the suction hole during the suction operation collides with the surface of the diffusing portion. When scattering, it is guided to the linear groove or linear protrusion, so that the amount of scattering can be concentrated or dispersed in the direction of the linear groove or linear protrusion. Alternatively, since a plurality of holes and protrusions are provided on the surface of the diffusion part facing the cylindrical body, a part of the beverage sucked from the suction hole can be directly released into the oral cavity without reflecting it to the diffusion plate. It can diffuse widely in.
Moreover, when a linear groove | channel or linear protrusion and a some hole and protrusion are combined arbitrarily and provided, each effect can be given.

Invention of Claim 4 is invention of the method of manufacturing the straw which has a spreading | diffusion function using the thermosoftening cylinder, and is manufactured including the process of following (1)-(4).
(1) Using a known extrusion molding machine, a cylinder cut into a predetermined length (usually 100 to 250 mm) by a known method is created.
(2) A hole through which the inside and the outside of the cylinder are passed is formed at a predetermined length from the end of the cylinder. In this case, it is standard that the predetermined length is “predetermined length = diffusing portion length−cylinder outer diameter dimension”, but it is not necessarily limited to this, and can be freely set as necessary. It's okay.

(3) Heat-press the part used as the diffusion part of the cylinder. When a flat heat press plate is used, the cylinder is formed into a flat plate. At this time, if the heat press temperature is set in the vicinity of the melting temperature of the resin, the inner surface of the cylindrical body is fused and integrated, but molding by heat pressing is possible without raising the temperature to the melting temperature of the resin. Moreover, you may use the heat press board designed in various shapes other than a plane, such as a shape which can be chamfered, as a heat press plate.

(4) The boundary between the cylindrical body and the diffusing portion is a folded portion, and the diffusing portion is refracted by 90 degrees or more with the hole created in the cylindrical body as the inside. For the refraction work, a press device capable of heating the folded portion to the softening temperature of the resin is used. In addition, you may implement this refraction | bending process simultaneously with the heat press of (3).
According to the present invention, a straw having a diffusion function can be easily manufactured.

When eating and drinking hot hot coffee using the straw of the present invention having a diffusing function, when the drinker ascends the inside of the straw by suction reaches the lip part including the straw, the lips first touch the straw wall. You can experience the temperature of the beverage. The aspirator can adjust the amount of suction in a reflective manner according to the temperature at which the person feels. As a result of the suction operation, the coffee is sprayed from the suction hole, collides with the diffracting portion that is refracted over the suction hole, and is scattered in the oral cavity. As a result, the coffee is uniformly and widely dispersed in the entire area of the tongue in the oral cavity and the inner wall of the cheek. Simultaneously with the dispersion, the tongue and the oral cavity skin are contacted, and the contacting tongue and oral cavity skin are rapidly deprived of heat and approach the skin temperature, so that it can be guided to the throat while sucking an appropriate amount. Therefore, with the straw of the present invention, a portion of the intraoral skin does not receive heat stimulation and the oral cavity is not burned, and hot coffee can be eaten and consumed without a sense of incongruity.

On the other hand, when eating and drinking a low-temperature beverage such as juice using the straw of the present invention, the beverage sucked in the suction hole collides with the diffusing portion that covers the suction hole and is refracted and is widely scattered in the oral cavity. To do. As a result, the beverage comes into uniform contact with all the miso distributed on the tongue, and when it is swallowed, it also comes into contact with the miso distributed in the throat, so that the drinker can feel the taste of the juice twice over the tongue. You can fully taste it.

In addition, in beverages such as juice and milk in paper packs that are commercially available, if the paper pack body is accidentally pressed with a straw inserted, the internal beverage is sprayed from the tip of the straw and often stains clothes. . For small children, it is a daily routine. However, when the straw of the present invention is inserted into a paper pack and used, the beverage is almost sprayed on the surface of the hand that is pressed even when the paper pack body is accidentally pushed and the beverage inside is sprayed. . Therefore, the possibility of soiling clothes even if the paper pack body is accidentally pushed or grasped is much smaller than that of a normal straw.

Overview of the straw of the present invention The top view and side view of the straw of the present invention Variation of diffuser structure Diffusion effect visualization device for diffusion unit Collision splash direction of liquid Splash area after collision Oral miso distribution diagram Use in paper cup Use in paper pack Conventional straw Straw with opening on side A straw with a distribution port from the inside of the tube to the outside Prior Art Straw Liquid Injection Direction Eating situation explanatory drawing of eating and drinking Straw with inner folding hole Diffusion part having linear groove or linear protrusion Diffusion part with multiple holes or multiple protrusions Suction pressure measuring instrument Suction time measuring device Aspiration time measurement result

<Configuration of Straw of the Present Invention>
First, the configuration of the straw of the present invention will be described. However, the configuration described here is merely an example of the configuration of the present invention and is not limited thereto.
1 and 2 are schematic views of the straw of the present invention having a diffusing function. The outer diameter R is about 6 mm, the length L is about 210 mm, the wall thickness is 0.16 mm, and the length is about 48 mm from the folding part 15. Although the bellows 12 of about 8 mm is provided, the bellows 12 is not an essential requirement and may be omitted.

The length M of the diffusion part 13 is about 9 mm, the hole diameter D of the suction hole 14 is 3 to 5 mm, and the center position P of the hole from the folding part 15 is about 6 mm. The shape of the suction hole 14 may be any of a circle, an ellipse, a triangle, a square, a star, and an arbitrary polygon. The number of holes 14 need not be one, and may be two or more. Further, the size of the hole is not limited to 3 to 5 mm, and may be 5 mm or more and 3 mm or less, and when a plurality of holes are used, a hole of 3 mm or less may be included.

<The manufacturing method of the straw of this invention>
Next, a method for producing a straw according to the present invention will be described. However, the method described here is merely an example of the method for producing a straw according to the present invention, and the present invention is not limited to this including raw materials to be used.
Polypropylene, which is the raw material for the straw, is melted and formed into a cylindrical tube by extrusion from the tip of the die. The cylindrical tube is then cut to a length of about 220 mm using a cutter. Next, a bellows having a length of about 10 mm is formed by a well-known bellows forming method at a position about 50 mm from the end of the straw. The length of the straw becomes about 210 mm due to the bellows formation. Next, a suction hole 14 having a diameter D of 3 to 5 mm is formed at a position about 15 mm from the end of the straw by a method such as punching or melting with heat. As a method for forming the hole, the suction hole may be a hole formed by providing a cut portion in a part of the cylindrical body and bending the cut portion into the cylindrical body. FIG. 15 shows a straw 50 having an inner folding hole. The inner bent portion 51 can be easily formed by forming a cut line radially with a cutter around the center of the hole and then inserting a heated rod having substantially the same size as the hole.
Subsequently, the range of 9 mm from the end of the straw is heat-pressed with a heat press mold for several seconds to form the diffusion portion 13.

As shown in FIG. 3, a deformed diffuser that deforms the diffuser 13 includes an inwardly curved shape 13 a, an outwardly curved surface 13 b, a horizontal groove 13 c, a flat plate with chamfered corners 13 d, It can be formed by using a special heat press mold according to the purpose, such as 13e designed animal face, 13f designed flower, 13g designed Mt. Fuji.
Moreover, as shown in FIG. 16, the linear groove | channel or the linear protrusion 54 can be formed in the surface facing the cylinder of a spreading | diffusion part. The linear groove or linear protrusion 54 can be easily formed by providing a convex or concave portion corresponding to the groove shape or linear protrusion on the heat press surface of the heat press mold. Further, a plurality of holes or a plurality of protrusions 56 as shown in FIG. 17 can be formed. In this case, the heat press mold needs to be provided with a plurality of protrusions or a plurality of depressions for forming a plurality of holes or a plurality of protrusions 56. Although illustration is omitted, the linear groove, the linear protrusion, the plurality of holes, and the plurality of protrusions can be formed in any combination and in any ratio.
Next, the diffusion portion 13 is refracted by 90 degrees or more with respect to the axial direction of the straw straight body portion 11 by a heat press method. In FIGS. 1 and 2, a heat press plate is used and the light is refracted at about 120 degrees. In addition, this refraction | bending process can also be implemented simultaneously with the formation process of the spreading | diffusion part 13 implemented immediately before. Finishing the refraction process, the production of the straw 10 of the present invention is completed.

<Visualization of the flow of the straw of the present invention>
In order to confirm the function of the diffusion unit 13 when the liquid is sucked using the straw of the present invention, the diffusion effect visualization device of the diffusion unit shown in FIG. 4 is used to suck the liquid into the straw and the outside of the straw at the time of suction. The flow motion state of the liquid was observed. In FIG. 4, the straw 10 of the present invention is inserted into a cup 45 containing water 46. At this time, the straw 10 of the present invention is secretly inserted into a straw insertion hole 29 provided in the suction cylinder 24. The suction cylinder 24 is a container made of transparent plastic, and the inside can be easily visually observed. A suction port 25 is provided in the upper part of the suction cylinder 24 and can be sucked in the suction direction 26 in the manner of sucking the straw. Observation at the time of aspiration was carried out with all the straws shown in FIGS. As shown in FIG. 13, all the straws other than the straw 10 of the present invention sprayed only from the opening hole 17, and the spraying direction was only the direction perpendicular to the hole.

As shown in FIG. 5, the straw 10 of the present invention is ejected from the suction hole 14 in the suction direction 26 perpendicular to the hole surface, collides with the diffusion portion 13 at the reflection point 27, and scatters in the reflection direction 28. The situation of spreading was observed. When observed from the front direction of the diffusing portion 13, it was confirmed that the scattering direction spreads over almost the whole area except the folding portion 15 as shown in the scattering region 23 shown in FIG. 6. Although details are omitted in this visualization experiment, the diffusion state can be controlled in various ways by applying various diffuser structures such as the refraction angle of the diffuser 13, the positions of the holes 14, and the number of the holes 14. Was also confirmed.

<Experiment 1: Eating and drinking experiment of hot coffee>
The difference between the straw 10 of the present invention when eating and drinking hot coffee and a normal straw (bent straw 42) was evaluated by a sensitivity test using three monitors. The prejudice that burns the throat when drinking hot coffee with a straw works, and correct evaluation is difficult unless this preconception is wiped out. It was conducted after a certain level of proficiency.
As shown in FIG. 8, the experiment was conducted by using a straw 10 according to the present invention to eat and drink hot coffee 22 having a temperature of 78 ° C. to 80 ° C. accommodated in a paper cup 21 with a lid sold at a convenience store. It was carried out by the method of hearing the impression about the difference when doing.
The differences between the three monitors were slight and could be summarized next.

(1) A normal straw can be drunk even if it is drunk carefully, but it is difficult to eat and drink while tasting. With the straw of the present invention, you can feel that the coffee flows in the direction of the lips and both cheeks, and there is no fear of burning the throat, so you can suck the amount of coffee that is equal to or greater than when drinking directly from a cup without a straw .
(2) When drinking hot coffee using the straw 10 of the present invention, in terms of enjoying the heat and taste, it is equivalent to drinking directly from a cup, but it is not necessary to incline the cup, You can eat and drink smartly.

<Experiment 2: Eating and drinking experiment of orange juice>
About the eating and drinking of orange juice with ice, it was carried out following Experiment 1 by the same three monitors as in Experiment 1. The impressions of the three monitors were almost the same as follows.
(1) Although there is no difference between the straw 10 of the present invention and the normal straw, the orange juice spreads in the mouth with the straw 10 of the present invention when strongly sucked, but the throat with the normal straw It is sucked directly and finishes drinking without one room to taste. The present invention is excellent in the taste of orange juice.

<Experiment 3: paper pack gripping experiment>
The following experiment was conducted on eating and drinking of a paper pack containing vegetable juice.
(1) As shown in FIG. 9, the straw 10 of the present invention is inserted into a paper pack 20 containing vegetable juice, the side of the paper pack 20 is pushed with a finger, and an experiment is made to jump out the vegetable juice. An experiment was conducted in which the side of the paper pack 20 was pressed with a finger. In the straw 10 of the present invention, the sprayed vegetable juice flowed down through the straw and soiled hands and fingers. However, with a normal straw, the vegetable juice jumped upward and soiled the surroundings when the pressing force was large.

    (2) In the eating and drinking of a paper pack, when the paper pack is thrown away into the trash box after drinking, a small amount of liquid remaining in the straw rarely jets vigorously at the moment when the paper pack is grasped. In an experiment that reproduced this situation, a normal straw sprinkled vegetable juice vigorously upward, whereas the straw 10 of the present invention sprayed downward along the straw and remained dirty.

<Experiment 4: Diffusion effect confirmation experiment of diffusion plate>
(1) Measurement of human suction pressure In order to carry out the diffusion effect confirmation experiment of the diffusion plate, first, the human suction pressure is measured using the suction pressure measuring device shown in FIG. The suction pressure measuring instrument 57 is provided with a vacuum gauge 65 and a straw 42 attached to a sealed tube 59 whose both ends are closed. In measuring the suction force, the straw 42 is sucked into the mouth and sucked at this time. Is read with a vacuum gauge 65. Although there were individual differences in the measurement results, it was as follows.
Limit suction force: -0.018 MPa
Strong suction: -0.012 MPa
Normal suction: -0.005 MPa
Weak suction: -0.003 MPa

(2) Suction Time Measuring Device FIG. 19 is a suction time measuring device, which is also a device that can visualize the diffusion state of the diffusion part. The suction time measuring device 60 includes a decompression device 61, a pressure adjustment valve 62, a buffer tank 63, an electromagnetic valve 67, a vacuum gauge 65, and a visualization container 66 integrally connected by a pipe 64, and a lower end portion of the visualization container 66. The straw 1 of the present invention to be measured
0 is set. The tip of the straw 10 is a container 7 in which water 71 is accommodated.
Soaked in zero. The camera 72 is for photographing the situation in which the water sucked in the diffusion part of the straw is diffused. Prior to the use of this apparatus, the straw insertion portion of the visualization container 66 is first sealed with a tape or the like, and the pressure reducing device 61 and the electromagnetic valve 67 are operated to decompress the pipe 64. At this time, the degree of opening and closing of the pressure regulating valve 62 is adjusted so that the degree of vacuum indicated by the vacuum gauge 65 becomes a desired degree of vacuum. In the measurement described in the following (3), it is set to -0.005 MPa corresponding to a normal suction pressure of a person. The pressure setting by the pressure setting valve is ended as described above, and then the tape on the bottom of the visualization container 66 is peeled off, and the straw 10 of the present invention to be evaluated is inserted. In addition, a predetermined amount of water 71 is put in, and the tip of the straw 10 of the present invention is immersed in the container 70 to operate the suction time measuring device 60. At this time, the time required to suck a predetermined volume of water is measured. In addition, the camera 72 captures the state of water diffusion by the diffusing unit during suction.

(3) Suction time measurement experiment Nine types of samples shown in Table 1 were prepared for two factors of the hole diameter D of the suction hole 14 and the diffusion portion length M shown in FIG. The time required for sucking water was measured. The results were as shown in Table 1. An analysis of variance was performed on the measured data, and as shown in Table 2, it was found that both the D dimension and the M dimension were significant with respect to the suction time. The relationship between the D dimension with the M dimension as a parameter and the suction time is as shown in FIG.
It was also confirmed that when the D dimension is large and the M dimension is small, a part of the water sucked from the suction hole 14 is sucked without colliding with the reflecting portion.

  The straw of the present invention having a diffusion function has no danger of clogging the throat by suction, and can be used with peace of mind by infants and sick people. The structure of the straw having a diffusion function is not limited to the straw used in normal eating and drinking, but if the inner diameter of the straw is optimized, a cup with a suction tube for infants or a handicapped person can use soup or liquid food. Can also be used when eating and drinking.

DESCRIPTION OF SYMBOLS 10 Straw of this invention 11 Straight body part 12 Bellows 13 Diffusion part 13a-13f Deformation diffusion part 14 Suction hole 15 Folding part 16 Tip release part 20 Paper pack 21 Paper cup 22 Hot coffee 23 Scatter area 24 Suction cylinder 25 Suction port 26 Suction direction 27 Reflection point 28 Reflection direction 29 Straw insertion hole 30 Intraoral 31 Tongue 34 Throat 38a-38e Miso 42 Bending straw 45 Cup 46 Water 50 Straw 51 having inner folding hole Inner folding part 53 Linear groove or linear projection Diffusion unit 54 having linear grooves or projections 55 Diffusion unit 56 having multiple holes or projections 56 Multiple holes or projections 57 Suction pressure measuring tool 59 Sealed tube 60 Suction time measuring device 61 Pressure reducing device 62 Pressure adjusting valve 63 Buffer Tank 64 Piping 65 Vacuum gauge 67 Solenoid valve 71 Water 72 Camera

Claims (4)

It is a cylindrical straw used when eating and drinking liquid beverages,
A flat plate-like diffusion portion is provided at one end of the cylindrical body,
The diffusion part is provided with a bent part that is refracted so as to face the cylinder with respect to the length direction of the cylinder,
A straw having a diffusing function, wherein a hole is provided in a surface of the cylindrical body facing the diffusing portion. The straw having a diffusing function according to claim 1, wherein the diffusing portion has a shape designed by chamfering a front end thereof. The linear groove, the linear protrusion, the plurality of holes, and the plurality of protrusions are provided singly or in combination on the surface of the diffusion portion facing the cylindrical body. A straw with a diffusion function. Forming a hole through which the inside and the outside of the cylindrical body pass at one end of the cylindrical body;
A step of forming a diffusion part by heat pressing at the one end part and further from the hole; and
Providing the diffusing portion with a bent portion that is refracted to face the hole in the longitudinal direction of the cylindrical body;
A method for producing a straw having a diffusing function.