Three-section type paper telescopic straw

Abstract

The utility model discloses a three-section type paper telescopic straw which is high in material utilization rate and small in telescopic resistance. According to the technical scheme, the telescopic pipe comprises a large pipe, a middle pipe telescopically arranged in the large pipe and a small pipe telescopically arranged in the middle pipe, a first necking opening is formed in the front end of the large pipe, a first flaring matched with the first necking opening in a positioning mode is formed in the rear end of the middle pipe, a second necking opening is formed in the front end of the middle pipe, and the small pipe is arranged in the middle pipe. The rear end of the small pipe is provided with a second flared opening matched with the second flared opening in a positioning mode, the position, close to the first flared opening, of the large pipe is at least provided with two first positioning grooves which are arranged at equal intervals, the position, close to the second flared opening, of the middle pipe is at least provided with two second positioning grooves which are arranged at equal intervals, and the middle pipe stretches out.

Description

Technical Field

[0001] This utility model belongs to the field of straws, and in particular relates to a paper telescopic straw. Background Technology

[0002] Paper telescopic straws are telescopic straws made of paper, primarily used for drinking liquids such as milk tea and coffee. Traditional paper telescopic straws typically consist of two sections: a large tube and a telescopic small tube housed within the large tube. The large tube has a constricted end, and the small tube has an flared end that engages with the constricted end. To ensure the stability of the connection between the large and small tubes, a relatively long flared end (generally one-third of the total straw length) is usually required. The disadvantages are that they are unsuitable for the production of three-section paper telescopic straws, resulting in significant material waste and very high telescopic resistance, making them difficult to use. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a three-section paper telescopic straw with high material utilization and low telescopic resistance.

[0004] To solve the above problems, the technical solution adopted by this utility model includes: a large tube, a retractable middle tube disposed within the large tube, and a retractable small tube disposed within the middle tube. The large tube has a first constriction at its front end, the middle tube has a first flared end that positions and cooperates with the first constriction at its rear end, and a second constriction at its front end. The small tube has a second flared end that positions and cooperates with the second constriction at its rear end. The large tube has at least two equally spaced first positioning grooves near the first constriction, and the middle tube has at least two equally spaced second positioning grooves near the second constriction. When the middle tube extends, the first flared end is positioned between the first constriction and the first positioning groove. When the small tube extends, the second flared end is positioned between the second constriction and the second positioning groove.

[0005] The three-section paper telescopic straw is characterized in that: both ends of the first positioning groove and the second positioning groove are provided with inclined guide surfaces.

[0006] The three-section paper telescopic straw is characterized in that: the large tube, the middle tube, and the small tube each include an outer layer, a middle layer, and an inner layer, and at least the outer layer and the inner layer are provided with spiral adhesive parts facing opposite directions.

[0007] The three-section paper telescopic straw is characterized in that: the inner wall of the rear end of the large tube is provided with a flange for positioning the first flared opening.

[0008] The three-section paper telescopic straw is characterized in that: the front end of the small tube is provided with an inclined surface, and at least the top of the inclined surface is provided with a coating layer.

[0009] The advantages of this three-section paper telescopic straw are as follows: the tubes are positioned by a constriction, a protective opening, and a positioning groove, which allows for stable positioning without the need for a long flare. Furthermore, it reduces resistance during extension and retraction, and also reduces material usage.

[0010] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the three-section paper telescopic straw of this utility model;

[0012] Figure 2 This is an exploded view of the three-section paper telescopic straw of this utility model;

[0013] Figure 3 This is a cross-sectional view of the three-section paper telescopic straw of this utility model;

[0014] Figure 4 This is a partial enlarged view of the three-section paper telescopic straw of this utility model;

[0015] Figure 5 This is a schematic diagram of the structure of the large tube of this utility model. Detailed Implementation

[0016] Reference Figures 1-5 As shown, the three-section paper telescopic straw of this utility model includes a large tube 1, a telescopic middle tube 2 disposed within the large tube 1, and a telescopic small tube 3 disposed within the middle tube 2. The large tube 1 has a first constriction 5 at its front end, the middle tube 2 has a first flared end 6 at its rear end that positions and cooperates with the first constriction 5, the middle tube 2 has a second constriction 7 at its front end, and the small tube 3 has a second flared end 8 at its rear end that positions and cooperates with the second constriction 7. The large tube 1 has two equally spaced first positioning grooves 9 near the first constriction 5, and the middle tube 2 has two equally spaced second positioning grooves 10 near the second constriction 7. When the middle tube 2 is extended, the first flared end 6 is positioned between the first constriction 5 and the first positioning groove 9. When the small tube 3 is extended, the second flared end 8 is positioned between the second constriction 7 and the second positioning groove 10.

[0017] Preferably, both ends of the first positioning groove 9 and the second positioning groove 10 are provided with inclined guide surfaces 11. By providing the guide surfaces 11, the constricted opening can be more smoothly inserted into the groove, facilitating expansion and contraction.

[0018] Preferably, the large tube 1, the middle tube 2, and the small tube 3 each include an outer layer 12, a middle layer 13, and an inner layer 14, and the outer layer 12 and the inner layer 14 are provided with spiral adhesive portions 15 facing opposite directions. The outer layer 12 and the inner layer 14 are formed by curling the spiral adhesive portions 15 facing opposite directions, which can greatly improve the strength of the straw.

[0019] Preferably, the inner wall of the rear end of the large tube 1 is provided with a flange 16 for positioning the first flared opening 6. The flange 16 can prevent the middle tube 2 from falling off the rear end of the large tube 1.

[0020] Preferably, the front end of the small tube 3 is provided with a bevel 17, and the top of the bevel 17 is provided with an adhesive layer 18. This is to improve the strength of the top of the bevel 17, thereby enabling it to better pierce the film of the beverage cup.

[0021] As stated above, this is not intended to limit the present invention in any way. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed structure and technical content to create equivalent embodiments without departing from the scope of the present invention. However, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A three-section paper telescopic straw, comprising a large tube (1), a telescopic middle tube (2) disposed within the large tube (1), and a telescopic small tube (3) disposed within the middle tube (2), characterized in that: The large tube (1) has a first constriction (5) at its front end, the middle tube (2) has a first flared end (6) that is positioned and cooperates with the first constriction (5) at its rear end and a second constriction (7) at its front end, and the small tube (3) has a second flared end (8) that is positioned and cooperates with the second constriction (7) at its rear end. The large tube (1) has at least two equally spaced first positioning grooves (9) near the first constriction (5), and the middle tube (2) has at least two equally spaced second positioning grooves (10) near the second constriction (7). When the middle tube (2) extends, the first flared end (6) is positioned between the first constriction (5) and the first positioning groove (9). When the small tube (3) extends, the second flared end (8) is positioned between the second constriction (7) and the second positioning groove (10).

2. The three-section paper telescopic straw according to claim 1, characterized in that: Both ends of the first positioning groove (9) and the second positioning groove (10) are provided with inclined guide surfaces (11).

3. The three-section paper telescopic straw according to claim 1, characterized in that: The large tube (1), the middle tube (2), and the small tube (3) each include an outer layer (12), a middle layer (13), and an inner layer (14), and at least the outer layer (12) and the inner layer (14) are provided with spiral adhesive portions (15) facing opposite directions.

4. The three-section paper telescopic straw according to claim 1, characterized in that: The inner wall of the rear end of the large tube (1) is provided with a flange (16) for positioning the first flared opening (6).

5. The three-section paper telescopic straw according to claim 1, characterized in that: The small tube (3) has a bevel (17) at its front end, and at least the top of the bevel (17) has an adhesive layer (18).

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