CN110801139A

CN110801139A - Metal telescopic straw

Info

Publication number: CN110801139A
Application number: CN201810887431.2A
Authority: CN
Inventors: 张福楠; 李睿翎
Original assignee: PROFESSION ENTERPRISES CO Ltd
Current assignee: PROFESSION ENTERPRISES CO Ltd
Priority date: 2018-08-06
Filing date: 2018-08-06
Publication date: 2020-02-18

Abstract

A metal telescopic suction pipe is provided with a first pipe fitting, a second pipe fitting and a third pipe fitting, wherein the first pipe fitting, the second pipe fitting and the third pipe fitting are respectively provided with an upper opening and a lower opening, the first pipe fitting, the second pipe fitting and the third pipe fitting are continuously sleeved with each other, the first pipe fitting can be upwards stretched, the third pipe fitting can be downwards stretched to enable the metal telescopic suction pipe to form a long strip shape, the metal telescopic suction pipe can be telescopic and portable while eating is achieved, moreover, the first length is larger than the second length, the second length is larger than the third length, the second pipe fitting and the third pipe fitting are abutted against a flange of the first pipe fitting for positioning, the third pipe fitting can completely cover the first pipe fitting and the second pipe fitting, pollution can be reduced when the metal telescopic suction pipe is contracted and stored, in addition, the smoothness can reduce the friction force of stretching or contraction contact, and the telescopic effect among the first pipe fitting, the second pipe fitting and the third pipe fitting is favorable for reducing the resistance of mutual contact sliding, the sliding smoothness is improved, and more labor is saved.

Description

Metal telescopic straw

Technical Field

A metal telescopic straw, an environment-friendly straw made of metal, especially has the convenient functions of telescopic and storage, when the straw is contracted, a second pipe fitting and a third pipe fitting are abutted against the flange of a first pipe fitting for positioning, and the pollution can be reduced.

Background

Domestic beverage industry is prosperous, people also like to drink beverages by hand shaking and making beverages at present, but a large number of disposable consumables (such as beverage cups or straws) also become a great career, and the reusable beverage cups or straws are gradually paid attention to in order to reduce the compelling of consumables to environment or ecology.

Wherein, in the use of straw, traditional plastic straw not only is because of the material problem, and the plastic produces the unfavorable plasticizing agent to the human body easily, and in the practicality, the plastic straw is most only sees through the miscut and reaches utensil puncture effect in the structure of breaing a mouthful, but most advanced receiving extrusion deformation back, just by a wide margin reduction its puncture seal membrane's utility.

However, in order to solve the problems of environmental protection and practicability of plastic straws, the existing stainless steel, wood or glass straws can be reused, but the derived disadvantages are that the straws are not easy to store and carry, in addition, the wood straws are easy to go moldy and go bad, and the glass straws are easy to damage due to high brittleness.

As is evident from the above drawbacks, the main problem of overcoming the repetitive use of straws is portability.

Disclosure of Invention

In order to overcome the disadvantages of poor material utilization benefit, potential damage to the environment and human health of the conventional plastic straws and the defect of inconvenient carrying of the traditional metal, glass or wood straws, the invention aims to provide a metal telescopic straw structure which is convenient to carry, can be contracted and positioned, can reduce pollution, and is convenient to use and sanitary.

To achieve the aforementioned object, the metal telescopic straw of the present invention comprises a first pipe, a second pipe and a third pipe, the first pipe fitting is in a conical shape with an upper opening and a lower opening, the upper opening of the first pipe fitting extends outwards to form a flange, the first pipe fitting has a smooth outer wall surface and an inner wall surface, the second pipe fitting is conical with an upper opening and a lower opening and has a second length, the outer wall surface and the inner wall surface of the second pipe fitting have smoothness, the second pipe fitting is sleeved and attached outside the first pipe fitting, the third pipe fitting is conical and has a third length, the outer wall surface and the inner wall surface of the third pipe fitting have smoothness, the third pipe fitting is sleeved and attached outside the second pipe fitting, and a break structure for cutting the surface of the beverage sealing film or the fruit to guide the fluid is arranged at the lower opening end of the third pipe fitting.

Therefore, the outer diameter of the first pipe is slightly smaller than that of the second pipe, the outer diameter of the second pipe is slightly smaller than that of the third pipe, the first pipe, the second pipe and the third pipe can be continuously sleeved with each other, the first pipe can be upwards stretched and the third pipe can be downwards stretched into a long strip-shaped suction pipe for use, after the first pipe, the second pipe and the third pipe are stretched into an unfolded state, the outer side below the first pipe can be mutually attached and clamped with the inner side above the second pipe to form a first overlapping length which is mutually attached and contacted, and the outer side below the second pipe can be mutually attached and clamped with the inner side above the third pipe to form a second overlapping length which is mutually attached and contacted.

And the first length is greater than the second length, and the second length is greater than the third length, the third pipe fitting can wrap the first pipe fitting and the second pipe fitting completely, when the pipe fitting is contracted and collected, the pollution can be reduced, the second pipe fitting and the third pipe fitting are propped against the flange of the first pipe fitting for positioning, furthermore, the outer wall surface and the inner wall surface thereof have smoothness and coniform, the friction force of stretching or contraction contact can be reduced by the smoothness, the expansion and contraction among the first pipe fitting, the second pipe fitting and the third pipe fitting are beneficial to reducing the resistance of mutual contact sliding, and the sliding smoothness is increased to achieve more labor saving.

Furthermore, in another embodiment of the present invention, the corresponding relationship between the inside and the outside of the first tube, the second tube and the third tube is reversed, wherein the first pipe fitting is in a conical shape with an upper opening and a lower opening and has a first length, an upper opening at the upper end of the first pipe fitting is provided with a flange extending inwards, the first pipe fitting has a smooth outer wall surface and an inner wall surface, the second pipe fitting is conical with an upper opening and a lower opening and has a second length, the outer wall surface and the inner wall surface of the second pipe fitting have smoothness, the second pipe fitting is sleeved and attached in the first pipe fitting, the third pipe fitting is conical and has a third length, the outer wall surface and the inner wall surface of the third pipe fitting have smoothness, the third pipe fitting is sleeved and attached in the second pipe fitting, and a breaking structure for cutting the beverage sealing film is arranged at the lower opening end of the third pipe fitting.

Therefore, the outer diameter of the first pipe is slightly larger than that of the second pipe, the outer diameter of the second pipe is slightly larger than that of the third pipe, the first pipe, the second pipe and the third pipe can be continuously sleeved with each other, the first pipe can be upwards stretched and the third pipe can be downwards stretched to enable the metal telescopic straw to form a long strip shape, after the first pipe, the second pipe and the third pipe are stretched into an unfolded state, the inner side below the first pipe can be mutually attached and clamped with the outer side above the second pipe to form a first overlapping length which is mutually attached and contacted, and the inner side below the second pipe can be mutually attached and clamped with the outer side above the third pipe to form a second overlapping length which is mutually attached and contacted.

Furthermore, in the above two embodiments, the first overlapping length and the second overlapping length are one tenth of the total length of the metal telescopic straw.

Further, in the above two embodiments, the first overlapping length and the second overlapping length are 5 mm.

Furthermore, in the two embodiments, the total length of the metal telescopic straw is set to 210-220 mm in the unfolded state, and the first overlapping length and the second overlapping length are 21-22 mm.

In addition, in the above two embodiments, the taper of the first tube, the taper of the second tube and the taper of the third tube are the same, and the taper is set within 10 °.

In addition, in the above two embodiments, the taper of the first tube, the second tube and the third tube is preferably 3 ° to 5 °.

Further, in the two embodiments, the outer diameters of the first tube, the second tube and the third tube are within 20 mm.

Further, in the two embodiments, the outer diameters of the first tube, the second tube and the third tube are preferably between 10 and 15 mm.

Furthermore, in the above two embodiments, the metal telescopic straw is made of a metal material with a smooth surface.

Furthermore, in the above two embodiments, the shape of the breaking structure is any one of a saw-tooth shape, a pointed tooth shape, a circular tooth shape or a semicircular arc spoon shape.

The metal telescopic straw has the storage function, when being stored, the flange can be used for blocking the second pipe fitting and the third pipe fitting so as to avoid the second pipe fitting and the third pipe fitting from being separated, and after being stored, the metal telescopic straw can be conveniently carried, the material can be used by people at ease, the defects of no sanitation, such as plasticizing agent, corrosion, deterioration or fragmentation, are not easy to generate, the defects of the conventional straw are overcome, and the metal telescopic straw is a product with practical value.

Drawings

Fig. 1 is a schematic structural perspective view of a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the first embodiment of the present invention in an expanded state.

FIG. 3 is a sectional view of the first embodiment of the present invention in a storage state.

FIG. 4 is a cross-sectional view of the second embodiment of the present invention in an expanded state.

Fig. 5 is a schematic cross-sectional view of a serrated break structure according to a second embodiment of the invention.

Fig. 6 is a schematic cross-sectional view of a saw-toothed crevasse structure according to a first embodiment of the invention.

Fig. 7 is a schematic cross-sectional view of another crevasse structure according to the second embodiment of the invention.

Fig. 8 is a schematic cross-sectional view of another crevasse structure according to the first embodiment of the invention.

Fig. 9 is a schematic cross-sectional view of a first structure of a semicircular arc spoon-shaped crevasse structure according to a second embodiment of the invention.

Fig. 10 is a schematic cross-sectional view of a second structure of a semicircular arc spoon-shaped crevasse structure according to a second embodiment of the invention.

Fig. 11 is a schematic cross-sectional view of another perspective of the semicircular arc spoon-shaped breach structure according to the first embodiment of the present invention.

Description of the symbols

1 first pipe fitting

11 upper opening

12 Flange

2 second pipe fitting

3 third pipe fitting

31 crevasse structure

4 metal telescopic straw

L1 first length

L2 second length

L3 third Length

S1 first overlap length

S2 second overlap length

R1 first upper opening external diameter

r1 first lower opening outside diameter

R2 second upper opening outside diameter

r2 second lower opening outside diameter

R3 third upper opening external diameter

r3 third lower opening external diameter

Theta taper.

Detailed Description

In order to clearly and clearly express the features of the present invention and the advantages thereof different from the conventional art, the following description is given by way of two embodiments with reference to the accompanying drawings.

Referring to fig. 1 and 2, a first embodiment of the present invention is related to a metal telescopic straw, wherein the metal telescopic straw 4 at least includes: a first pipe member 1, which is conical and has a first length L1, wherein an upper opening 11 at the upper end of the first pipe member 1 is outwardly extended with a flange 12, and the outer wall surface and the inner wall surface of the first pipe member 1 have smoothness.

A second pipe 2, which is conical and has a second length L2, the outer wall surface and the inner wall surface of the second pipe 2 have smoothness, and the second pipe 2 is fitted around the first pipe 1.

A third tube 3, which is conical and has a third length L3, the outer wall surface and the inner wall surface of the third tube 3 have smoothness, the third tube 3 is sleeved and attached outside the second tube 2, a lower opening 31 at the lower end of the third tube 3 is provided with a breaking structure 31 for cutting the surface of the beverage sealing film or the fruit to guide the fluid, the first length L1 is greater than the second length L2, and the second length L2 is greater than the third length L3.

Therefore, the outer diameter of the first tube 1 is slightly smaller than the second tube 2, and the outer diameter of the second tube 2 is slightly smaller than the third tube 3, so that the first tube 1, the second tube 2 and the third tube 3 can be continuously sleeved with each other, and the first tube 1 can be pulled upwards and the third tube 3 can be pulled downwards to form the metal telescopic straw 4 into a long strip shape, after the first tube 1, the second tube 2 and the third tube 3 are pulled, the outer wall surface below the first tube 1 and the inner wall surface above the second tube 2 can be mutually attached and clamped to form a first overlapping length S1 which is mutually attached and contacted, and the outer wall surface below the second tube 2 and the inner wall surface above the third tube 3 can be mutually attached and clamped to form a second overlapping length S2 which is mutually attached and contacted, and the first overlapping length S1 and the second overlapping length S2 can be set to be one tenth of the total length of the metal telescopic straw 4, the strength of the extension and the first overlapping length S1 can prevent the first tube 1 and the second tube 2 from slipping, and the second overlapping length S2 prevents the second tube 2 and the third tube 3 from slipping.

Please refer to fig. 3, which is a storage state of the metal telescopic straw 4 according to the first embodiment, and refer to fig. 2, fig. 2 is a stretching and unfolding state of the metal telescopic straw 4 according to the first embodiment, so that after the metal telescopic straw 4 is stored, the flange 12 can be used for blocking the second pipe 2 and the third pipe 3 to prevent the second pipe 2 and the third pipe 3 from being separated; moreover, the first pipe fitting 1, the second pipe fitting 2 and the third pipe fitting 3 are sleeved with each other, the outer wall surface and the inner wall surface of the first pipe fitting 1 have smoothness, when the first pipe fitting 1, the second pipe fitting 2 and the third pipe fitting 3 are expanded or contracted, the friction force of stretching or contraction contact can be reduced by the smoothness, the expansion and contraction of the first pipe fitting 1, the second pipe fitting 2 and the third pipe fitting 3 are beneficial to reducing the resistance of mutual contact sliding, and the sliding smoothness is improved to achieve more labor saving.

Referring to fig. 2 and 3, in order to meet the requirements of the general public and maintain the stability of the product quality, the actual specifications and dimensions of the metal telescopic straw 4 are further defined, wherein: the first length L1 of the first tube 1 is greater than the second length L2 of the second tube 2, the second length L2 of the second tube 2 is greater than the third length L3 of the third tube 3, when the tube is retracted and stored, the second tube 2 and the third tube 3 are pressed against the flange 12 of the first tube 1 to be positioned and prevented from being separated, and the third tube 3 can completely cover the first tube 1 and the second tube 2, so that the pollution can be reduced; further, the total length of the device in the unfolded state can be set to 210-220 mm, which is a preferable using length; in addition, the first overlapping length S1 and the second overlapping length S2 are preferably 21-22 mm, which is one tenth of the total length of the metal telescopic straw.

In addition, the outer diameters of the first pipe 1, the second pipe 2 and the third pipe 3 are within 20mm, wherein the preferred sizes of the outer diameters of the first pipe 1, the second pipe 2 and the third pipe 3 are 10 to 15mm, for example: the outer diameter of the first pipe member 1 is preferably 15mm, and the most preferable size is 10 mm; alternatively, the outer diameter of the second pipe 2 is preferably 15mm, and the most preferable size is 10 mm; alternatively, the outer diameter of the third tube 3 is preferably 15mm, and most preferably 10 mm. In a preferred embodiment of the present invention, a first outer diameter difference between the first upper opening outer diameter R1 and the first lower opening outer diameter R1 of the first tube 1 is greater than a second outer diameter difference between the second upper opening outer diameter R2 and the second lower opening outer diameter R2 of the second tube 2, and the second outer diameter difference of the second tube 2 is greater than a third outer diameter difference between the third upper opening outer diameter R3 and the third lower opening outer diameter R3 of the third tube 3.

Then, the taper θ of the first tube 1, the second tube 2 and the third tube 3 are the same, which is helpful for repeated stretching or shrinking for a long time, and the problem of deformation caused by taper difference generated on the contact surface of relative sliding displacement between the tubes is avoided. Furthermore, the taper angle theta can be set within 10 degrees, which is beneficial to the stability and smoothness of the sliding of the contact surface, and moreover, the optimal external diameter difference among the first pipe fitting 1, the second pipe fitting 2 and the third pipe fitting 3 is achieved, furthermore, the taper angle theta takes 3 degrees to 5 degrees as the optimal taper angle, and the optimal taper angle can have optimal sliding performance and lower friction force, so as to achieve the sliding fluency of extension and contraction. In an embodiment of the invention, the taper θ of the first pipe 1 is a first taper, and the first taper is equal to the first outer diameter difference divided by the first length L1; furthermore, the taper θ of the second tube 2 is a second taper, which is equal to the second outer diameter difference divided by the second length L2; and the taper θ of the third tube 3 is a third taper, which is equal to the third outer diameter difference divided by the third length L3, and the tapers of the first taper, the second taper and the third taper are equal through the design of the tube length and the outer diameter difference.

Then, the metal telescopic straw 4 is made of a metal material with a smooth surface, so that the joint parts of the first pipe fitting 1, the second pipe fitting 2 and the third pipe fitting 3 are smooth contact surfaces, and the operation is smoother, wherein the metal telescopic straw 4 is made of a stainless steel metal material as an optimal material.

Referring to fig. 4, a second embodiment of the present invention is related to a metal telescopic straw, which at least includes: a first pipe member 1, which is conical and has a first length L1, and an upper opening 11 at the upper end of the first pipe member 1 is provided with a flange 12 extending inward, and the outer wall surface and the inner wall surface of the first pipe member 1 have smoothness.

A second pipe fitting 2, which is conical and has a second length L2, the outer wall surface and the inner wall surface of the second pipe fitting 2 have smoothness, and the second pipe fitting 2 is tightly fitted in the first pipe fitting 1.

A third tube 3, which is conical and has a third length L3, the outer wall surface and the inner wall surface of the third tube 3 have smoothness, the third tube 3 is sleeved and attached in the second tube 2, and a breaking structure 31 for cutting the surface of the beverage film or the fruit to guide the fluid is disposed at the lower opening end of the third tube 3.

Therefore, the outer diameter of the first tube 1 is slightly larger than the second tube 2, and the outer diameter of the second tube 2 is slightly larger than the third tube 3, so that the first tube 1, the second tube 2 and the third tube 3 can be continuously sleeved with each other, and the first tube 1 can be pulled upwards and the third tube 3 can be pulled downwards, so that the metal telescopic straw 4 forms a long strip shape, after the first tube 1, the second tube 2 and the third tube 3 are pulled, the inner wall surface below the first tube 1 and the outer wall surface above the second tube 2 can be mutually attached and clamped to form a first overlapping length S1 which is mutually attached and contacted, and the inner wall surface below the second tube 2 and the outer wall surface above the third tube 3 can be mutually attached and clamped to form a second overlapping length S2 which is mutually attached and contacted, the first overlapping length S1 and the second overlapping length S2 and the total length can be set to one tenth of the total length of the metal telescopic straw 4 after being pulled, the strength of the pipe in the extended use is enhanced, and the first overlapping length S1 prevents the first pipe 1 and the second pipe 2 from slipping off, and the second overlapping length S2 prevents the second pipe 2 and the third pipe 3 from slipping off.

Referring to fig. 4, the flange 12 of the second embodiment of the present invention is also used for blocking the second tube 2 and the third tube 3 after the metal telescopic straw 4 is received, so as to prevent the second tube 2 and the third tube 3 from being separated, and the third tube 3 can completely cover the first tube 1 and the second tube 2, which can reduce the pollution. Moreover, the first pipe fitting 1, the second pipe fitting 2 and the third pipe fitting 3 are sleeved with each other, the outer wall surface and the inner wall surface of the first pipe fitting 1 have smoothness, when the first pipe fitting 1, the second pipe fitting 2 and the third pipe fitting 3 are expanded or contracted, the friction force of stretching or contraction contact can be reduced by the smoothness, the expansion and contraction among the first pipe fitting 1, the second pipe fitting 2 and the third pipe fitting 3 are beneficial to reducing the resistance of mutual contact sliding, and the sliding smoothness is improved to achieve more labor saving.

The specifications and dimensions of the above-mentioned features are applicable to the first and second embodiments of the present invention.

Please refer to fig. 5 to 8, which are schematic cross-sectional views of the breaking structure of the present invention, such that the breaking structure 31 is filled with various shape variations, which can respectively show that the breaking structure 31 can be used to cut the beverage sealing film or the fruit surface to guide the fluid in the first and second embodiments in the form of saw tooth (as shown in fig. 5), sharp tooth (as shown in fig. 8) or circular tooth (as shown in fig. 6 and fig. 7), so as to suck the beverage in the beverage cup, thereby facilitating the scooping of the food material in the beverage cup for eating; referring to fig. 9 to 11, the breaching structure 31 is in the form of a semi-circular spoon on the first and second embodiments, and can be used for cutting the surface of the beverage film or fruit to guide the fluid and serving as a spoon to scoop the food.

Claims

1. A metal telescopic straw, characterized by comprising: a first pipe fitting (1) which is in a conical shape with an upper opening and a lower opening and has a first length (L1), an upper opening (11) at the upper end of the first pipe fitting (1) is provided with a flange (12) in an outward extending manner, and the outer wall surface and the inner wall surface of the first pipe fitting (1) have smoothness; the second pipe fitting (2) is conical and is provided with a second length (L2), the outer wall surface and the inner wall surface of the second pipe fitting (2) have smoothness, and the second pipe fitting (2) is sleeved and attached outside the first pipe fitting (1); a third tube (3) which is conical and has a third length (L3), wherein the outer wall surface and the inner wall surface of the third tube (3) have smoothness, the third tube (3) is sleeved and attached outside the second tube (2), a break structure (31) is arranged at the lower opening end of the third tube (3), the first length (L1) is greater than the second length (L2), and the second length (L2) is greater than the third length (L3); therefore, the first pipe (1), the second pipe (2) and the third pipe (3) are stretched into a spread state to form a strip shape for the metal telescopic straw (4), so that the outer wall surface below the first pipe (1) and the inner wall surface above the second pipe (2) are mutually attached and clamped to form a first overlapping length (S1) which is mutually attached and contacted, and the outer wall surface below the second pipe (2) and the inner wall surface above the third pipe (3) are mutually attached and clamped to form a second overlapping length (S2) which is mutually attached and contacted.

2. The metal telescopic straw as claimed in claim 1, wherein the first overlapping length (S1) and the second overlapping length (S2) are one tenth of the total length of the metal telescopic straw (4).

3. The metal telescopic straw as claimed in claim 1, wherein the first overlapping length (S1) and the second overlapping length (S2) are 5 mm.

4. The metal telescopic straw as claimed in claim 2, wherein the metal telescopic straw (4) has an overall length of 210-220 mm and the first overlapping length (S1) and the second overlapping length (S2) are 21-22 mm in the unfolded state.

5. The metal telescopic straw according to claim 1, wherein the first tube (1), the second tube (2) and the third tube (3) have the same conical taper (θ) which is set to be within 10 °.

6. The metal drinking straw as claimed in claim 5, wherein the taper angle (θ) is 3 ° -5 °.

7. The metal telescopic straw as claimed in claim 1, wherein the metal telescopic straw (4) is made of a metal material having a smooth surface.

8. The metal telescopic straw as claimed in claim 1, wherein the shape of the breach structure (31) is any one of saw-toothed shape, pointed tooth shape, circular tooth shape or semi-circular spoon shape.

9. The metal telescopic straw according to claim 1, wherein the first (1) and second (2) and third (3) tubular members have an outer diameter within 20 mm.

10. The metal telescopic straw according to claim 9, wherein the first (1) and second (2) and third (3) tubular members have an outer diameter of 10 to 15 mm.

11. A metal telescopic straw, characterized by comprising: a first pipe member (1) which is in a conical shape with an upper opening and a lower opening and has a first length (L1), wherein an upper opening (11) at the upper end of the first pipe member (1) is provided with a flange (12) extending inwards, and the outer wall surface and the inner wall surface of the first pipe member (1) have smoothness; the second pipe fitting (2) is conical and is provided with a second length (L2), the outer wall surface and the inner wall surface of the second pipe fitting (2) have smoothness, and the second pipe fitting (2) is sleeved and attached in the first pipe fitting (1); a third tube (3) which is conical and has a third length (L3), wherein the outer wall surface and the inner wall surface of the third tube (3) have smoothness, the third tube (3) is sleeved and attached in the second tube (2), a break structure (31) is arranged at the lower opening end of the third tube (3), the first length (L1) is greater than the second length (L2), and the second length (L2) is greater than the third length (L3);

therefore, the first pipe (1), the second pipe (2) and the third pipe (3) are stretched into a spread state to form a strip shape for the metal telescopic straw (4), so that the inner wall surface below the first pipe (1) and the outer wall surface above the second pipe (2) are mutually attached and clamped to form a first overlapping length (S1) which is mutually attached and contacted, and the inner wall surface below the second pipe (2) and the outer wall surface above the third pipe (3) are mutually attached and clamped to form a second overlapping length (S2) which is mutually attached and contacted.

12. The metal telescopic straw as claimed in claim 11, wherein the first overlapping length (S1) and the second overlapping length (S2) are one tenth of the total length of the metal telescopic straw (4).

13. The metal telescopic straw as claimed in claim 11, wherein the first overlapping length (S1) and the second overlapping length (S2) are 5 mm.

14. The metal telescopic straw as claimed in claim 12, wherein the metal telescopic straw (4) has an overall length of 210-220 mm and the first overlapping length (S1) and the second overlapping length (S2) are 21-22 mm in the unfolded state.

15. The metal telescopic straw according to claim 12, wherein the conical tapers (θ) of the first tube member (1), the second tube member (2) and the third tube member (3) are the same, and the taper (θ) is set to be within 10 °.

16. The metal drinking straw as claimed in claim 15, wherein the taper angle (θ) is 3 ° -5 °.

17. The metal telescopic straw as claimed in claim 11, wherein the metal telescopic straw (4) is made of a metal material having a smooth surface.

18. The metal telescopic straw as claimed in claim 11, wherein the shape of the breach structure (31) is any one of saw-toothed shape, pointed tooth shape, circular tooth shape or semi-circular spoon shape.

19. The metal telescopic straw according to claim 11, wherein the first (1) and second (2) and third (3) tubular members have an outer diameter within 20 mm.

20. The metal telescopic straw according to claim 19, wherein the first (1) and second (2) and third (3) tubular members have an outer diameter of 10 to 15 mm.