An environmentally friendly, shrinkable, lightweight plastic bottle

Abstract

The present invention discloses an environmentally friendly, retractable, lightweight plastic bottle, comprising a bottom outer bottle body, an upper outer bottle body and an inner folding bottle body. Beneficial effects: The present invention adopts a bottom outer bottle body, an upper outer bottle body and an inner folding bottle body. When retracting, the user can rotate the handle to drive the upper outer bottle body to rotate, and then the upper outer bottle body is rotated into the bottom outer bottle body through the thread cooperation of the inner thread and the outer thread. The upper outer bottle body and the inner folding bottle body rotate relative to each other, driving the inner folding bottle body to fold and shrink, and then completing the overall shrinkage, reducing the occupied space, and facilitating carrying and use. At the same time, the outer surface of the inner folding bottle body is bonded with nano aerogel felt, which can play a good role in heat preservation. Through the design of the inner and outer double-layer bottle body, it can also further play a role in heat insulation, solving the problem of poor heat preservation effect of retractable plastic bottles at this stage, and having good use functions and product competitiveness.

Description

Technical Field

[0001] The invention relates to the technical field of plastic bottles, in particular to an environmentally friendly, shrinkable and lightweight plastic bottle. Background Art

[0002] Plastic bottles are mainly made of materials such as polyethylene or polypropylene and added with a variety of organic solvents. Plastic bottles widely use polyester (PET), polyethylene (PE), and polypropylene (PP) as raw materials. After adding corresponding organic solvents, they are heated at high temperature and then blow molded, extruded, or injection molded through plastic molds to form plastic containers.

[0003] At present, there are retractable plastic bottles. For example, the patent with application number CN201821590053.3 discloses a retractable plastic bottle, which is retracted by a corrugated structure. The corrugated structure is widely used in retractable plastic bottles at this stage. Traditional retractable plastic bottles are difficult to keep warm, causing the liquid inside to cool or heat quickly, which is inconvenient to use. At the same time, since traditional retractable plastic bottles have the characteristics of retracting, it is difficult to install handles to assist in holding, and users with small hands find it difficult to hold for a long time, affecting the convenience of use. At the same time, since the plastic bottle itself is relatively light, the center of gravity moves up when the bottle body is extended, resulting in insufficient stability and reliability in placement, and it is easy to tilt and cause water to spill, affecting the safety and stability of use. Especially when taking a high-speed rail, train or airplane, the traditional plastic bottle is unstable in placement and is very easy to tilt when bumped, and further improvements can be made. In addition, the traditional retractable plastic bottle is retracted by pressing. When the user accidentally presses the bottle body, it is very easy to accidentally shrink, causing internal liquid leakage, which can also be further improved.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an environmentally friendly, shrinkable, lightweight plastic bottle having the advantages of good heat preservation performance, stable placement, safe and reliable use, convenience in use, and easy to carry, thereby solving the problems in the above-mentioned background technology.

[0006] In order to achieve the above advantages of good thermal insulation performance, stable placement, safe and reliable use, convenient use and easy to carry, the specific technical scheme adopted by the present invention is as follows: The invention discloses an environmentally friendly and shrinkable lightweight plastic bottle, comprising a bottom outer bottle body, an upper outer bottle body and an inner folding bottle body, wherein the top opening of the bottom outer bottle body is threadedly inserted with the upper outer bottle body, and the top opening of the upper outer bottle body penetrates and is rotatably connected with the inner folding bottle body, and the bottom surface of the inner folding bottle body is fixedly connected to the inner bottom surface of the bottom outer bottle body, a nano aerogel felt is fixedly bonded to the outer surface of the inner folding bottle body, a suction cup is rotatably connected to the bottom surface of the bottom outer bottle body, a lower plate is fixedly installed on the surface of one side of the bottom of the bottom outer bottle body, and a sleeve is fixedly installed on the top surface of the lower plate, a plug rod is slidably inserted with the top opening of the sleeve, and the upper plate is fixedly installed on the top surface of the plug rod, an outer ring track is fixedly installed on the outer wall of the top of the upper outer bottle body, a collar is rotatably sleeved on the outer side of the outer ring track, and the outer wall of the collar is fixedly connected to the other end of the upper plate.

[0007] Furthermore, an inner wall of the bottom outer bottle body is provided with an internal thread, and an outer wall of the upper outer bottle body is provided with an external thread, and the external thread is threadably matched with the internal thread.

[0008] Furthermore, a limiting ring is provided on the top outer wall of the inner folding bottle body, and the top opening of the upper outer bottle body is inserted into the inner side of the limiting ring and is rotatably connected to the limiting ring.

[0009] Furthermore, a bottle cap is threadedly sleeved on the top surface of the inner folding bottle body.

[0010] Furthermore, a bottom groove is provided on the bottom surface of the bottom outer bottle body, and a suction cup is arranged on the inner side of the bottom groove, and a top tube is connected to the top surface of the suction cup, a rotating plate is fixedly installed on the top surface of the top tube, a rotating groove is provided on the top surface of the bottom groove, the top tube and the rotating plate are inserted into the rotating groove and are rotatably connected to the rotating groove, a sealing sleeve is fixedly bonded to the outer wall of the top tube, and the outer wall of the sealing sleeve is rotatably abutted against the inner wall of the bottom of the rotating groove, an air inlet hole is provided on the side wall of the top tube, a through hole connected to the air inlet hole is provided on the surface of the sealing sleeve, an air inlet channel is provided at the bottom of the bottom outer bottle body, and the air inlet channel is arranged corresponding to the through hole.

[0011] Furthermore, a rotating handle is fixedly mounted on the outer side wall of the top of the upper outer bottle body, and the rotating handle is arranged in multiple groups.

[0012] Furthermore, the thickness of the nano aerogel felt is not less than 3 mm.

[0013] Furthermore, the vertical cross-section of the outer ring track is a convex shape, the vertical cross-section of the inner wall of the collar is a concave shape, and the inner wall of the collar is polished.

[0014] Furthermore, the bottom outer bottle body, the upper outer bottle body, the inner folding bottle body, the bottle cover, the upper plate, the lower plate, the insertion rod and the sleeve are all made of degradable plastic material.

[0015] Furthermore, the bottom outer bottle body, the upper outer bottle body, the inner folding bottle body, the suction cup, the top cylinder, the rotating plate and the bottom groove are coaxially arranged.

[0016] Compared with the prior art, the present invention provides an environmentally friendly, shrinkable, lightweight plastic bottle, which has the following beneficial effects: (1) The present invention adopts a bottom outer bottle body, an upper outer bottle body and an inner folding bottle body. When shrinking, the user can rotate the handle to drive the upper outer bottle body to rotate, and then the upper outer bottle body is rotated into the bottom outer bottle body through the thread cooperation of the inner thread and the outer thread. The upper outer bottle body and the inner folding bottle body rotate relative to each other, driving the inner folding bottle body to fold and shrink, thereby completing the overall shrinkage, reducing the occupied space, and facilitating carrying and use. At the same time, the outer surface of the inner folding bottle body is bonded with nano aerogel felt, which can play a good role in heat preservation. The design of the inner and outer double-layer bottle body can also further play a role in heat insulation, solving the problem of poor heat preservation effect of retractable plastic bottles at this stage, and having good use function and product competitiveness. At the same time, the device is retracted as a whole by rotation, avoiding the instability caused by the traditional retractable plastic bottle through squeezing and retracting, improving the overall stability of use, and improving the safety of use.

[0017] (2) The present invention adopts an insertion rod and a sleeve. The insertion rod can slide up and down along the sleeve. When the device is retracted, the upper outer bottle body rotates, driving the outer ring track to rotate. The sleeve sleeved on the outer side of the outer ring track does not rotate. The insertion rod enters the sleeve. The insertion rod, sleeve, upper plate and lower plate are used to form a handle structure, which is convenient for staff to carry and use, thereby improving the flexibility and convenience of use.

[0018] (3) The present invention adopts a bottom suction cup structure. The device can be fixed to a smooth table by adsorption through the suction cup installed at the bottom, thereby improving the stability of placement and solving the problem that traditional plastic bottles are light in weight and unstable in placement. The device can be stably placed on bumpy trains, high-speed trains and airplanes to avoid water spilling due to tilting, thereby improving the stability and safety of use. When removing the device, the bottom outer bottle body can be rotated. At the same time as the bottom outer bottle body rotates, the air inlet channel rotates. When the air inlet channel rotates to align with the through hole, the external gas enters the air inlet hole through the air inlet channel and the through hole, and then enters the suction cup. The suction cup loses its adsorption effect and the device can be easily removed. The use is also very convenient and simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1This is a schematic diagram of the external structure of the front elevation of an environmentally friendly, shrinkable, lightweight plastic bottle according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the external structure of a side elevation of an environmentally friendly, shrinkable, lightweight plastic bottle according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of an environmentally friendly, shrinkable, lightweight plastic bottle according to an embodiment of the present invention; Figure 4 is a front view of an environmentally friendly, shrinkable, lightweight plastic bottle according to an embodiment of the present invention; Figure 5 is an enlarged view of node A of an environmentally friendly, shrinkable, lightweight plastic bottle according to an embodiment of the present invention; Figure 6 is an enlarged view of node B of an environmentally friendly, shrinkable, lightweight plastic bottle according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the external structure of an inner folding bottle of an environmentally friendly, shrinkable, lightweight plastic bottle according to an embodiment of the present invention; Figure 8 The figure is a schematic diagram of the external structure of an environmentally friendly, shrinkable, lightweight plastic bottle suction cup according to an embodiment of the present invention.

[0021] In the figure: 1. Bottom outer bottle body; 2. Upper outer bottle body; 3. Inner folding bottle body; 4. Nano aerogel felt; 5. Bottle cap; 6. Limiting ring; 7. Rotating handle; 8. Sleeve ring; 9. Upper plate; 10. Insert rod; 11. Sleeve; 12. Lower plate; 13. Bottom groove; 14. Suction cup; 15. Air inlet channel; 16. Internal thread; 17. External thread; 18. Rotating groove; 19. Rotating plate; 20. Top tube; 21. Sealing sleeve; 22. Air inlet hole; 23. Through hole; 24. Outer ring track. DETAILED DESCRIPTION

[0022] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0023] According to an embodiment of the present invention, an environmentally friendly, shrinkable, lightweight plastic bottle is provided.

[0024] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Figure 1-8As shown, an environmentally friendly, shrinkable, lightweight plastic bottle according to an embodiment of the present invention comprises a bottom outer bottle body 1, an upper outer bottle body 2 and an inner folding bottle body 3, the top of the bottom outer bottle body 1 is threadedly plugged with the upper outer bottle body 2, and the top of the upper outer bottle body 2 is rotatably connected with the inner folding bottle body 3, and the bottom surface of the inner folding bottle body 3 is fixedly connected to the inner bottom surface of the bottom outer bottle body 1 to prevent the upper outer bottle body 2 from being separated from the bottom outer bottle body 1, the outer surface of the inner folding bottle body 3 is fixedly bonded with a nano aerogel felt 4, the bottom surface of the bottom outer bottle body 1 is rotatably connected with a suction cup 14, and the bottom of the bottom outer bottle body 1 A lower plate 12 is fixedly installed on one side surface of the upper part, and a sleeve 11 is fixedly installed on the top surface of the lower plate 12, a plug rod 10 is slidably inserted into the top of the sleeve 11, and an upper plate 9 is fixedly installed on the top surface of the plug rod 10, an outer ring track 24 is fixedly installed on the outer wall of the top of the upper outer bottle body 2, and a collar 8 is rotatably sleeved on the outer side of the outer ring track 24, and the outer wall of the collar 8 is fixedly connected to the other end of the upper plate 9. When shrinking, the user can rotate the handle 7 to drive the upper outer bottle body 2 to rotate, and then the upper outer bottle body 2 is rotated into the upper outer bottle body 2 through the threaded cooperation of the internal thread 16 and the external thread 17. The outer bottle body 1 at the bottom, the upper outer bottle body 2 and the inner folding bottle body 3 rotate relative to each other, driving the inner folding bottle body 3 to fold and shrink, thereby completing the overall shrinkage, reducing the occupied space, and making it convenient to carry and use. At the same time, the outer surface of the inner folding bottle body is bonded with a nano aerogel felt 4, which can play a good role in heat preservation. The design of the inner and outer double-layer bottle bodies can further play a role in heat insulation, solving the problem of poor heat preservation effect of retractable plastic bottles at this stage, and having good use functions and product competitiveness. At the same time, the device is retracted and expanded as a whole by rotation. The instability caused by squeezing and expanding and contracting of traditional retractable plastic bottles is avoided, the overall stability of use is improved, and the safety of use is improved. At the same time, the insertion rod 10 can slide up and down along the sleeve 11. When the device is contracted, the upper outer bottle body 2 rotates, driving the outer ring track 24 to rotate, and the ring 8 sleeved on the outside of the outer ring track 24 does not rotate. The insertion rod 10 enters the sleeve 11. The insertion rod 10, the sleeve 11, the upper plate 9 and the lower plate 12 are used to form a handle structure, which is convenient for staff to carry and use, thereby improving flexibility and convenience of use.

[0025] In one embodiment, an inner wall of the bottom outer bottle body 1 is provided with an internal thread 16, and an outer wall of the upper outer bottle body 2 is provided with an external thread 17, and the external thread 17 is threadably matched with the internal thread 16, which is a common threaded connection form.

[0026] In one embodiment, a limiting ring 6 is provided on the top outer wall of the inner folding bottle body 3, and the top opening of the upper outer bottle body 2 is inserted into the inner side of the limiting ring 6 and is rotatably connected with the limiting ring 6, so as to facilitate relative rotation between the inner folding bottle body 3 and the upper outer bottle body 2. At the same time, the limiting ring 6 enables the inner folding bottle body 3 and the upper outer bottle body 2 to rise and fall synchronously.

[0027] In one embodiment, the top surface of the inner folding bottle body 3 is threadedly sleeved with a bottle cap 5, which is a common structure.

[0028] In one embodiment, a bottom groove 13 is provided on the bottom surface of the bottom outer bottle body 1, and a suction cup 14 is provided inside the bottom groove 13, and a top tube 20 is connected to the top surface of the suction cup 14, and a rotating plate 19 is fixedly installed on the top surface of the top tube 20, and a rotating groove 18 is provided on the top surface of the bottom groove 13, and the top tube 20 and the rotating plate 19 are inserted into the rotating groove 18 and are rotatably connected to the rotating groove 18, and a sealing sleeve 21 is fixedly bonded to the outer wall of the top tube 20, and the outer wall of the sealing sleeve 21 is rotatably abutted against the inner wall of the bottom of the rotating groove 18, an air inlet hole 22 is provided through the side wall of the top tube 20, and a through hole 23 that is connected to the air inlet hole 22 is provided on the surface of the sealing sleeve 21, and an air inlet channel 15 is provided at the bottom of the bottom outer bottle body 1, and the air inlet channel 15 is arranged corresponding to the through hole 23, and the sealing sleeve 21 plays a sealing role. When the air inlet channel 15 is staggered with the through hole 23 The sealing sleeve 21 seals the through hole 23 to avoid air leakage, which facilitates the operation of the suction cup 14. The device can be fixed to the smooth desktop by adsorption through the suction cup 14 installed at the bottom, which improves the stability of placement and solves the problem that traditional plastic bottles are light in weight and unstable in placement. The device can be stably placed on bumpy trains, high-speed trains and airplanes to avoid the situation where water is spilled due to tilting, thereby improving the stability and safety of use. When removing the device, the bottom outer bottle body 1 can be rotated. At the same time as the bottom outer bottle body 1 rotates, the air inlet channel 15 rotates. When the air inlet channel 15 rotates to align with the through hole 23, the external gas enters the air inlet hole 22 through the air inlet channel 15 and the through hole 23, and is replenished into the suction cup 14. The suction cup 14 loses its adsorption effect, and the device can be easily removed. The use is also very convenient and simple.

[0029] In one embodiment, a rotating handle 7 is fixedly mounted on the outer side wall of the top of the upper outer bottle body 2 , and the rotating handle 7 is arranged in multiple groups to facilitate users to rotate the upper outer bottle body 2 .

[0030] In one embodiment, the thickness of the nano aerogel felt 4 is not less than 3 mm, which improves the thermal insulation effect.

[0031] In one embodiment, the vertical cross-section of the outer ring track 24 is convex, the vertical cross-section of the inner wall of the collar 8 is concave, and the inner wall of the collar 8 is polished to prevent the collar 8 from separating from the outer ring track 24.

[0032] In one embodiment, the bottom outer bottle body 1, the upper outer bottle body 2, the inner folding bottle body 3, the bottle cap 5, the upper plate 9, the lower plate 12, the insertion rod 10 and the sleeve 11 are all made of degradable plastic material, which is light in weight, can be degraded, and is more environmentally friendly.

[0033] In one embodiment, the bottom outer bottle body 1, the upper outer bottle body 2, the inner folding bottle body 3, the suction cup 14, the top tube 20, the rotating plate 19 and the bottom groove 13 are coaxially arranged to improve the stability of the rotation.

[0034] Working principle: When shrinking, the user can rotate the handle 7 to drive the upper outer bottle body 2 to rotate, and then the upper outer bottle body 2 is rotated into the bottom outer bottle body 1 through the thread cooperation of the internal thread 16 and the external thread 17. The upper outer bottle body 2 and the inner folding bottle body 3 rotate relative to each other, driving the inner folding bottle body 3 to fold and shrink, thereby completing the overall shrinkage, reducing the occupied space and facilitating carrying and use. At the same time, the outer surface of the internal folding bottle body is bonded with nano aerogel felt 4, which can play a good thermal insulation role. The design of the inner and outer double-layer bottle bodies can also further play a role of heat insulation, solving the problem of poor thermal insulation effect of retractable plastic bottles at this stage, and having good use functions and product competitiveness. At the same time, the device is retracted and expanded as a whole through rotation, avoiding the instability caused by the traditional retractable plastic bottles through squeezing and expansion, improving the overall stability of use, and improving the safety of use. At the same time, the insertion rod 10 can slide up and down along the sleeve 11. When shrinking the device, the upper outer bottle body 2 rotates, The outer ring track 24 is driven to rotate, and the ring 8 sleeved on the outside of the outer ring track 24 does not rotate, and the insertion rod 10 enters the sleeve 11. The insertion rod 10, the sleeve 11, the upper plate 9 and the lower plate 12 are used to form a handle structure, which is convenient for the staff to carry and use, and the flexibility and convenience of use are improved. At the same time, the device can be adsorbed and fixed to the smooth desktop through the suction cup 14 installed at the bottom, which improves the stability of placement and solves the problem that the traditional plastic bottle has a light weight and unstable placement. It can be stably placed on a bumpy train, high-speed rail and airplane to avoid the situation where water is spilled due to tilting, thereby improving the stability and safety of use. When removing the device, the bottom outer bottle body 1 can be rotated. At the same time as the bottom outer bottle body 1 rotates, the air inlet channel 15 rotates. When the air inlet channel 15 rotates to align with the through hole 23, the external gas enters the air inlet hole 22 through the air inlet channel 15 and the through hole 23, and replenishes it into the suction cup 14. The suction cup 14 loses its adsorption effect, and the device can be easily removed, which is also very convenient and simple to use.

[0035] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An environmentally friendly, shrinkable, lightweight plastic bottle, characterized in that: The invention comprises a bottom outer bottle body (1), an upper outer bottle body (2) and an inner folding bottle body (3), wherein the top of the bottom outer bottle body (1) is threadedly plugged with the upper outer bottle body (2), and the top of the upper outer bottle body (2) is penetrated and rotatably connected with the inner folding bottle body (3), and the bottom surface of the inner folding bottle body (3) is fixedly connected to the inner bottom surface of the bottom outer bottle body (1), a nano aerogel felt (4) is fixedly bonded to the outer surface of the inner folding bottle body (3), and a suction cup (14) is rotatably connected to the bottom surface of the bottom outer bottle body (1). A lower plate (12) is fixedly mounted on one side surface of the bottom of the bottom outer bottle body (1), and a sleeve (11) is fixedly mounted on the top surface of the lower plate (12); a plug rod (10) is slidably inserted into the top opening of the sleeve (11), and an upper plate (9) is fixedly mounted on the top surface of the plug rod (10); an outer ring track (24) is fixedly mounted on the outer wall of the top of the upper outer bottle body (2), and a sleeve ring (8) is rotatably sleeved on the outer side of the outer ring track (24), and the outer wall of the sleeve ring (8) is fixedly connected to the other end of the upper plate (9).

2. The environmentally friendly, shrinkable, lightweight plastic bottle according to claim 1, characterized in that: The inner wall of the bottom outer bottle body (1) is provided with an internal thread (16), and the outer wall of the upper outer bottle body (2) is provided with an external thread (17), and the external thread (17) is threadably matched with the internal thread (16).

3. The environmentally friendly, shrinkable, lightweight plastic bottle according to claim 1, characterized in that: A limiting ring (6) is provided on the top outer wall of the inner folding bottle body (3), and the top opening of the upper outer bottle body (2) is inserted into the inner side of the limiting ring (6) and is rotatably connected to the limiting ring (6).

4. The environmentally friendly, shrinkable, lightweight plastic bottle according to claim 1, characterized in that: A bottle cap (5) is threadedly sleeved on the top surface of the inner folding bottle body (3).

5. The environmentally friendly, shrinkable, lightweight plastic bottle according to claim 1, characterized in that: The bottom surface of the bottom outer bottle body (1) is provided with a bottom groove (13), and a suction cup (14) is arranged inside the bottom groove (13), and a top tube (20) is connected to the top surface of the suction cup (14), and a rotating plate (19) is fixedly mounted on the top surface of the top tube (20). The top surface of the bottom groove (13) is provided with a rotating groove (18), and the top tube (20) and the rotating plate (19) are inserted into the rotating groove (18) and are rotatably connected to the rotating groove (18). A sealing sleeve (21) is fixedly bonded to the outer wall of the top tube (20), and the outer wall of the sealing sleeve (21) is rotatably abutted against the inner wall of the bottom of the rotating groove (18). An air inlet hole (22) is formed through the side wall of the top tube (20), and a through hole (23) that is connected to the air inlet hole (22) is formed on the surface of the sealing sleeve (21). An air inlet channel (15) is formed at the bottom of the bottom outer bottle body (1), and the air inlet channel (15) is arranged corresponding to the through hole (23).

6. The environmentally friendly, shrinkable, lightweight plastic bottle according to claim 1, characterized in that: A rotating handle (7) is fixedly mounted on the outer side wall of the top of the upper outer bottle body (2), and the rotating handles (7) are arranged in multiple groups.

7. The environmentally friendly, shrinkable, lightweight plastic bottle according to claim 1, characterized in that: The thickness of the nano aerogel felt (4) is not less than 3 mm.

8. The environmentally friendly, shrinkable, lightweight plastic bottle according to claim 1, characterized in that: The outer ring track (24) has a convex shape in vertical cross-section, the inner wall of the sleeve ring (8) has a concave shape in vertical cross-section, and the inner wall of the sleeve ring (8) is polished.

9. The environmentally friendly, shrinkable, lightweight plastic bottle according to claim 1, characterized in that: The bottom outer bottle body (1), the upper outer bottle body (2), the inner folding bottle body (3), the bottle cap (5), the upper plate (9), the lower plate (12), the insertion rod (10) and the sleeve (11) are all made of degradable plastic material.

10. The environmentally friendly, shrinkable, lightweight plastic bottle according to claim 5, characterized in that: The bottom outer bottle body (1), the upper outer bottle body (2), the inner folding bottle body (3), the suction cup (14), the top cylinder (20), the rotating plate (19) and the bottom groove (13) are coaxially arranged.

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