An inflatable roller

Abstract

The utility model provides a kind of inflatable roller, comprising: roller main body, roller main body has circumferential side wall, first end cap and second end cap connected to the both ends of circumferential side wall, and circumferential side wall, first end cap and second end cap are formed with inflatable cavity around.Inflatable design enables roller to deflate and fold when not in use, making it easy to carry and store, greatly improving the portability and practicality of the product.

Description

Technical Field

[0001] This utility model relates to the field of massage rollers, and in particular to an inflatable roller. Background Technology

[0002] As people's living standards improve, their demand for health and relief from physical fatigue is also increasing. Massage rollers, as a convenient and effective auxiliary massage tool, have become very popular. Traditional massage rollers are usually made of solid or padded materials, with a fixed shape and hardness, making it difficult to adjust them to meet the needs of different users. In addition, these rollers are relatively large, making them inconvenient to carry and store, thus limiting their usage and convenience.

[0003] Therefore, there is a need in the market for an inflatable massage roller that is simple in structure, easy to inflate, and has good sealing performance. It can not only flexibly adjust the massage intensity according to the user's needs, but also deflate and store it after use, making it easy to carry and store, thus better meeting the needs of the market and users. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides an inflatable roller that can not only flexibly adjust the massage intensity according to the user's needs, but also deflate and store after use, making it easy to carry and store, thus better meeting the needs of the market and users.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] This utility model provides an inflatable roller, comprising:

[0007] A roller body having a circumferential sidewall, a first end cap and a second end cap connected to both ends of the circumferential sidewall, and an air-filled cavity formed around the circumferential sidewall, the first end cap and the second end cap;

[0008] A first inflation valve assembly is disposed on the roller body and is used to inflate the roller body.

[0009] The beneficial effects of this utility model are as follows: This utility model provides an inflatable roller, comprising: a roller body, the roller body having a circumferential sidewall, a first end cap connected to both ends of the circumferential sidewall, and a second end cap, wherein the circumferential sidewall, the first end cap, and the second end cap form an inflation cavity. The inflation design allows the roller to be deflated and folded when not in use, making it easy to carry and store, greatly improving the portability and practicality of the product. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a cross-sectional view of the present invention along the first inflation valve assembly;

[0014] Figure 3 This is a cross-sectional view of an embodiment of the present invention;

[0015] Figure 4 yes Figure 3 Enlarged view at point B;

[0016] Figure 5 This is a schematic diagram of the overall structure of another embodiment of the present invention;

[0017] Figure 6 This is a cross-sectional view along the first inflation valve assembly and the second inflation valve assembly of another embodiment;

[0018] Figure 7 yes Figure 6 Enlarged view of the first inflation valve assembly at point A;

[0019] Figure 8 This is a schematic diagram of the overall structure of the first inflation valve assembly of this utility model;

[0020] Figure 9 This is an exploded view of the first inflation valve assembly of this utility model;

[0021] Figure 10 This is a schematic diagram of the inner core of the first inflation valve assembly of this utility model;

[0022] Figure 11 This is a schematic diagram of the overall structure of another embodiment of the present utility model;

[0023] Figure 12 This is a cross-sectional view taken along the first inflation valve assembly, which is another embodiment of this utility model.

[0024] Figure 13 This is a cross-sectional view of yet another embodiment of the present invention;

[0025] Figure 14 yes Figure 13 Enlarged view at point C;

[0026] Figure 15 yes Figure 13 Enlarged view at point D;

[0027] Figure 16 This is an exploded view of another embodiment of the present invention. Detailed Implementation

[0028] refer to Figures 1 to 16 An inflatable roller comprising:

[0029] The roller body 10 has a circumferential sidewall 1, a first end cap 2 and a second end cap 3 connected to both ends of the circumferential sidewall 1, and an air cavity 11 is formed around the circumferential sidewall 1, the first end cap 2 and the second end cap 3.

[0030] The first inflation valve assembly 4 is disposed on the roller body 10 and is used to inflate the roller body 10.

[0031] With the above structure, since the roller body 10 has an air chamber 11 and is also equipped with a first air valve assembly 4, the hardness and elasticity of the roller can be flexibly adjusted according to the user's needs, enhancing the personalization and comfort of the massage experience. At the same time, the air-inflating design allows the roller to be deflated and folded when not in use, making it easy to carry and store, greatly improving the product's portability and practicality.

[0032] In this embodiment, the first end cap 2 is connected to the circumferential sidewall 1 by voltage pressing, adhesive bonding, or heat fusion. The second end cap 3 is also connected to the circumferential sidewall 1 by voltage pressing, adhesive bonding, or heat fusion. Through the above structure, using voltage pressing, adhesive bonding, or heat fusion, the sealing and firmness of the connection part 652 are ensured, effectively preventing air leakage from the inflation chamber 11, and improving the airtightness and safety of the inflation roller.

[0033] In this embodiment, the first end cap 2 and the second end cap 3 are made of the same material as the circumferential sidewall 1. The circumferential sidewall 1 is made of TPU, PVC, PP, PE, EVA, PA, PVDF, PET, PTFE, ETFE, PU (imitated leather), leather, or plastic. With the above structure, the circumferential sidewall 1 can be made of various polymer materials such as TPU, PVC, PP, PE, EVA, PA, PVDF, PET, PTFE, ETFE, PU (imitated leather), leather, and plastic. These materials have excellent flexibility and wear resistance, ensuring that the roller maintains good elasticity and user comfort after inflation. Different materials have their own advantages in terms of weather resistance, corrosion resistance, temperature resistance and tensile strength, which allows this roller to flexibly select the most suitable material according to the specific use environment and needs, thereby improving the product's applicability and service life.

[0034] In another embodiment, such as Figure 13-16 The first end cap 2 includes a first inner end cap 201 and a first outer end cap 202. The first inner end cap 201 is connected to the circumferential sidewall 1 by voltage pressing, adhesive bonding, or heat fusion. The first outer end cap 202 is connected to the outside of the first inner end cap and is a plastic end cap. The second end cap 3 includes a second inner end cap 301 and a second outer end cap 302. The second inner end cap 301 is connected to the circumferential sidewall 1 by voltage pressing, adhesive bonding, or heat fusion. The second outer end cap 302 is connected to the outside of the second inner end cap and is a plastic end cap.

[0035] Furthermore, the first outer end cap 202 is connected to the first inner end cap via a first locking assembly 7. The first locking assembly 7 includes a first locking member 71 disposed on the outside of the first inner end cap 201 and a first locking mating member 72 disposed on the inside of the first inner end cap 201 and engaged with the first locking member 71. The first inner end cap 201 has a first connecting hole 2011, and the first locking mating member 72 has a first connecting groove 721 corresponding to the first connecting hole 2011. The first connecting groove 721 has a first internal thread 7211. The first outer end cap 202 has a first connecting post 20 that matches the first connecting hole 2011. 21. The first connecting post 2021 is provided with a first external thread 2022 that mates with the first internal thread 7211; the second outer end cover 302 is connected to the second inner end cover 301 through the second locking assembly 8. The second locking assembly 8 includes a second locking member 81 located inside the second inner end cover 301 and a second locking mating member 82 located on the second outer end cover 302. The second locking member 81 is a second connecting groove 401 located on the first air valve assembly 4, and the second locking mating member 82 is a second connecting post 3021 located on the second outer end cover 302 and engaging with the second connecting groove 401.

[0036] Specifically, the first locking component 71 is a locking ring surrounding the first connecting hole 2011, and the locking ring has several locking holes. The first locking mating component 72 is a locking disc, and the locking disc also has several locking holes. The first inner end cover 201 also has several locking holes. Screws can pass through the locking holes on the locking ring, the first inner end cover 201, and the locking disc in sequence to fix the first locking assembly 7 on the first inner end cover 201. The second outer end cover 302 has a clearance hole, which is used to avoid the first inflation valve assembly 4.

[0037] With the above structure, by setting the first outer end cap 202 and the second outer end cap 302 made of plastic, the welding marks and rough edges on both sides of the inflatable roller can be covered, making the inflatable roller more beautiful and neat, and increasing its appeal to buyers.

[0038] In another embodiment, such as Figure 3-4 The circumferential sidewall 1 is composed of a first sidewall layer 12 and a second sidewall layer 13 stacked vertically, with the first sidewall layer 12 and the second sidewall layer 13 made of different materials. Of course, in other embodiments, the circumferential sidewall 1 can also be composed of two or more sides, such as three or four layers. Through the above structure, the circumferential sidewall 1 is composed of a first sidewall layer 12 and a second sidewall layer 13 stacked vertically, and the two layers are made of different materials. This multi-layer composite structure design effectively combines the advantages of each material, achieving complementary performance and improving the overall strength, wear resistance, and elasticity of the sidewall.

[0039] Furthermore, the first sidewall layer 12 is made of TPU, PVC, PP, PE, EVA, PA, PVDF, PET, PTFE, ETFE, PU imitation leather, leather, or plastic; the second sidewall layer 13 is made of mesh, Oxford cloth, or woven fabric. Through the above structure, the first sidewall layer 12 uses one of various polymer materials such as TPU, PVC, PP, PE, EVA, PA, PVDF, PET, PTFE, ETFE, PU imitation leather, leather, or plastic, possessing excellent elasticity, wear resistance, and airtightness, effectively ensuring the sealing of the inflation chamber 11 and the flexibility of the roller. The second sidewall layer 13 is made of fabric materials such as mesh, Oxford cloth, or woven fabric, which enhances the strength and durability of the sidewall, while improving the overall structural stability and tear resistance. The composite design of the two layers ensures the roller's good inflation performance and durability, meeting the diverse performance requirements of the product under different usage environments.

[0040] In this embodiment, the first inflation valve assembly 4 is located on either the first end cap 2 or the second end cap 3. This location facilitates inflation and deflation, improving ease of use. Integrating the inflation valve into the end cap simplifies the structure of the roller body 10, allowing users to quickly adjust the internal air pressure as needed, thus enabling personalized adjustments to the hardness and elasticity of the massage roller. This design also contributes to the compactness and aesthetics of the overall roller structure, enhancing the product's practicality and market competitiveness.

[0041] In another embodiment, such as Figure 11-12 The first inflation valve assembly 4 is disposed on the circumferential sidewall 1. Specifically, the circumferential sidewall 1 has a recessed second mounting groove 14, which includes a flat central portion 141 and inclined portions 142 on both sides. The first inflation valve assembly 4 is disposed in the central portion 141. With the above structure, the first inflation valve assembly 4 is disposed on the circumferential sidewall 1 and in the flat central portion 141 within the second mounting groove 14, ensuring the ease of installation of the first inflation valve assembly 4, improving the personalization of the roller, and facilitating users to quickly adjust the internal air pressure when needed.

[0042] In another embodiment, such as Figure 5-6It also includes a second inflation valve assembly 5, with the first inflation valve assembly 4 disposed on the first end cap 2 and the second inflation valve assembly 5 disposed on the second end cap 3. In this embodiment, the second inflation valve assembly 5 has the same structure as the first inflation valve assembly 4. With the above structure, by simultaneously providing the first inflation valve assembly 4 and the second inflation valve assembly 5 on the roller body 10, the inflation chamber 11 of the roller body 10 can be inflated or deflated more efficiently and conveniently, improving inflation efficiency and ease of use.

[0043] In this embodiment, the roller body 10 has a mounting port 101 for mounting the first inflation valve assembly 4, the first inflation valve assembly 4 including:

[0044] Valve body 41 is located in the inflation chamber 11 and connected to the inner wall of the roller body 10. Valve body 41 has an installation cavity 411 and a first air outlet 412 communicating with the installation cavity 411. The first air outlet 412 is connected to the inflation chamber 11.

[0045] The inner core 42 is located in the mounting cavity 411 and is connected to the inner wall of the valve body 41. The bottom of the inner core 42 has a second air outlet 421 for communicating with the first air outlet 412, and the top of the inner core 42 has an air inlet 422 for communicating with the second air outlet 421.

[0046] One-way valve core assembly 6 is used to open or close the second air outlet 421 so that gas can pass through the air inlet 422, the second air outlet 421, the first air outlet 412 and the inflation chamber 11 in sequence.

[0047] With the above structure, when inflating the inflatable roller, the inflation device can be aligned with the air inlet 422, and the one-way valve core assembly 6 opens the second air outlet 421. The gas can then pass through the air inlet 422, the second air outlet 421, and the first air outlet 412 in sequence, and finally enter the inflation chamber 11 to inflate the inflatable roller. When the inflation device is removed, the one-way valve core assembly 6 closes the second air outlet 421 to ensure unidirectional gas flow, effectively achieving the airtightness and inflation safety of the roller body 10. Of course, when it is necessary to deflate the roller, the second air outlet 421 can be manually opened through the one-way valve core assembly 6, and the gas can be discharged through the second air outlet 421 and the air inlet 422, thereby deflating the roller.

[0048] In this embodiment, the inner wall of the valve body 41 is provided with a third internal thread 413, and the outer wall of the inner core 42 is provided with a third external thread 423 for engaging with the third internal thread 413. Through this structure, the inner wall of the valve body 41 is provided with the third internal thread 413, and the outer wall of the inner core 42 is provided with the engaging third external thread 423. This threaded connection ensures a secure assembly of the valve body 41 and the inner core 42, guaranteeing the overall structural stability and airtightness of the assembly.

[0049] In this embodiment, the valve body 41 has multiple first air outlets 412 arranged in a circular array. Specifically, the width of each first air outlet 412 gradually increases from the inner wall of the valve body 41 towards the outer wall. With this structure, the valve body 41 has multiple first air outlets 412 arranged in a circular array, and the width of each first air outlet 412 gradually increases from the inner wall to the outer wall of the valve body 41. This optimizes the airflow channel design, effectively improves the gas flow efficiency during inflation or deflation, and reduces airflow resistance.

[0050] In this embodiment, the outer wall of the inner core 42 is recessed with a first sealing groove 424, and a first sealing ring 4241 is provided in the first sealing groove 424 to seal the gap between the outer wall of the inner core 42 and the inner wall of the valve body 41. The first sealing groove 424 is recessed on the outer wall of the inner core 42, and the first sealing ring 4241 is provided in the first sealing groove 424 to seal the gap between the inner core 42 and the valve body 41, thereby further enhancing the overall airtightness and pressure resistance.

[0051] In this embodiment, the first inflation valve assembly 4 further includes a valve cover 43, which is used to open or close the air inlet 422.

[0052] Furthermore, the inner core 42 has a snap-fit ​​rod 425 at the air inlet 422, and the bottom of the valve cover 43 has a spiral-shaped first snap-fit ​​block 431 and a second snap-fit ​​block 432, which are snapped into the snap-fit ​​rod 425 respectively.

[0053] Furthermore, the top of the valve cover 43 is provided with a push rod 433, which includes a first push arm 4331 and a second push arm 4332 arranged in opposite directions; the top of the inner core 42 is provided with a first stop block 426 and a second stop block 427 opposite to each other. When the push rod 433 is pushed until the first locking block 431 and the second locking block 432 are respectively locked with the locking rod 425, the first push arm 4331 abuts against the first stop block 426, and the second push arm 4332 abuts against the second stop block 427.

[0054] With the above structure, by setting a valve cover 43 in the first inflation valve assembly 4, the valve cover 43 can open or close the air inlet 422, facilitating inflation or sealing of the roller body 10, thus improving ease of use and airtightness. The bottom end of the valve cover 43 is provided with a spiral-shaped first locking block 431 and a second locking block 432, which respectively engage with the locking rod 425 at the air inlet 422 of the inner core 42. Rotating the valve cover 43 achieves quick and reliable connection and locking, improving the efficiency of installation and disassembly and the stability of the connection. The top of the valve cover 43 is provided with a push rod 433, which includes a first push arm 4331 and a second push arm 4332 in opposite directions. The top of the inner core 42 is provided with a first stop block 426 and a second stop block 427. After pushing, the first push arm 4331 and the second push arm 4332 respectively abut against the corresponding stop blocks, ensuring accurate positioning of the valve cover 43 during rotation and locking, further improving the product's ease of use.

[0055] In this embodiment, the one-way valve core assembly 6 includes a connecting sleeve 61 disposed in the middle of the snap-fit ​​rod 425, a valve stem 62 disposed in the connecting sleeve 61, a valve plug 63 connected to the bottom end of the valve stem 62, and a spring 64 sleeved on the valve stem 62. The top of the valve stem 62 is connected to a limiting member 65, the top end of the spring 64 abuts against the limiting member 65, and the bottom end of the spring 64 abuts against the bottom wall inside the connecting sleeve 61. A second sealing ring 631 is provided on the side of the valve plug 63 near the inner core 42. The second sealing ring 631 is used to seal the gap between the valve plug 63 and the bottom end of the inner core 42. With the above structure, when inflated using the inflation device, the valve stem 62 is squeezed downwards, causing the valve plug 63 to move downwards, thereby opening the second air outlet 421. Gas enters the inflation chamber 11 through the second air outlet 421 and then the first air outlet 412. When the inflation device is removed, the valve stem 62 rises under the elastic action of the spring 64, causing the valve plug 63 to press against the bottom end of the inner core 42. Furthermore, because a second sealing ring 631 is provided between the valve plug 63 and the inner core 42, the sealing performance of the one-way valve core assembly 6 is ensured. This design effectively achieves unidirectional gas flow, prevents backflow, and improves the airtightness and safety of the roller inflation chamber 11.

[0056] In this embodiment, the limiting member 65 includes a limiting part 651 and a connecting part 652. The connecting part 652 is provided with a second external thread 6521. The upper end of the valve stem 62 has a first mounting groove 621, and the first mounting groove 621 is provided with a second internal thread 6211 that mates with the second external thread 6521. Through the above structure, the limiting member 65 is firmly installed on the top of the valve stem 62 by means of threaded connection, which improves the assembly efficiency and makes the fixing of the limiting member 65 more stable, avoiding loosening during use, and further ensuring the opening and closing reliability and airtightness of the one-way valve core assembly 6.

[0057] In this embodiment, a third sealing ring 428 is also provided at the top of the inner core 42. The third sealing ring 428 is located between the valve cover 43 and the top of the inner core 42, and is used to seal the gap between the valve cover 43 and the inner core 42. Through the above structure, gas leakage from the connection between the valve cover 43 and the inner core 42 can be effectively prevented, further improving the overall airtightness of the inflation chamber 11, enhancing the stability and pressure resistance of the product in the inflation state, extending the service life of the roller, and improving safety in use.

[0058] In this embodiment, a hollowed-out annular groove 429 is provided at the top of the inner core 42 near the third sealing ring 428. A plurality of reinforcing ribs 4291 are provided in the hollowed-out annular groove 429, and the reinforcing ribs 4291 are arranged in a ring array within the hollowed-out annular groove 429. Through the above structure, the weight of the inner core 42 is effectively reduced, and its structural strength and stability are also enhanced.

[0059] The above description provides one or more embodiments in conjunction with specific content, but it is not intended that the specific implementation of this utility model is limited to these descriptions. Any methods or structures that are similar to or identical to those of this utility model, or any technical deductions or substitutions made based on the concept of this utility model, should be considered within the scope of protection of this utility model.

Claims

1. An inflatable roller, characterized in that, include: The roller body (10) has a circumferential sidewall (1), a first end cap (2) and a second end cap (3) connected to both ends of the circumferential sidewall (1), and the circumferential sidewall (1), the first end cap (2) and the second end cap (3) surround an inflation cavity (11); it also includes a first inflation valve assembly (4), which is disposed on the roller body (10) and is used to inflate the roller body (10).

2. The inflatable roller according to claim 1, characterized in that, The first end cap (2) is connected to the circumferential sidewall (1) by voltage pressing, adhesive bonding, or heat fusion; the second end cap (3) is connected to the circumferential sidewall (1) by voltage pressing, adhesive bonding, or heat fusion.

3. An inflatable roller according to claim 1, characterized in that, The first end cap (2) includes a first inner end cap (201) and a first outer end cap (202). The first inner end cap (201) is connected to the circumferential sidewall (1) by voltage pressing, adhesive bonding, or heat fusion. The first outer end cap (202) is connected to the outside of the first inner end cap (201). The first outer end cap (202) is a plastic end cap. The second end cap (3) includes a second inner end cap (301) and a second outer end cap (302). The second inner end cap (301) is connected to the circumferential sidewall (1) by voltage pressing, adhesive bonding, or heat fusion. The second outer end cap (302) is connected to the outside of the second inner end cap. The second outer end cap (302) is a plastic end cap.

4. An inflatable roller according to claim 3, characterized in that, The first outer end cap (202) is connected to the first inner end cap via a first locking assembly (7). The first locking assembly (7) includes a first locking member (71) disposed on the outside of the first inner end cap (201) and a first locking mating member (72) disposed on the inside of the first inner end cap (201) and cooperating with the first locking member (71). The first inner end cap (201) has a first connecting hole (2011), and the first locking mating member (72) has a first connecting groove (721) corresponding to the first connecting hole (2011). The first connecting groove (721) is provided with a first internal thread (7211), and the first outer end cap (202) is provided with a first connecting post (2021) matching the first connecting hole (2011). The first connecting post (2021) is provided with a first external thread (2022) that mates with the first internal thread (7211); the second outer end cap (302) is connected to the second inner end cap (301) through a second locking assembly (8). The second locking assembly (8) includes a second locking member (81) disposed in the first inflation valve assembly (4) and located inside the second inner end cap (301) and a second locking mating member (82) disposed in the second outer end cap (302). The second locking member (81) is a second connecting groove (401) disposed in the first inflation valve assembly (4), and the second locking mating member (82) is a second connecting post (3021) disposed in the second outer end cap (302) and engaging with the second connecting groove (401).

5. An inflatable roller according to claim 1, characterized in that, The materials of the first end cap (2) and the second end cap (3) are the same as the materials of the circumferential sidewall (1); the circumferential sidewall (1) is a TPU circumferential sidewall (1) or a PVC circumferential sidewall (1) or a PP circumferential sidewall (1) or a PE circumferential sidewall (1) or an EVA circumferential sidewall (1) or a PA circumferential sidewall (1) or a PVDF circumferential sidewall (1) or a PET polyester circumferential sidewall (1) or a PTFE circumferential sidewall (1) or an ETFE circumferential sidewall (1) or a PU imitation leather circumferential sidewall (1) or a leather circumferential sidewall (1) or a plastic circumferential sidewall (1).

6. An inflatable roller according to claim 1, characterized in that, The circumferential sidewall (1) is composed of a first sidewall layer (12) and a second sidewall layer (13) stacked on top of each other. The first sidewall layer (12) and the second sidewall layer (13) are sidewall layers made of different materials. The first sidewall layer (12) is a TPU first sidewall layer (12), a PVC first sidewall layer (12), a PP first sidewall layer (12), a PE first sidewall layer (12), an EVA first sidewall layer (12), a PA first sidewall layer (12), a PVDF first sidewall layer (12), a PET polyester first sidewall layer (12), a PTFE first sidewall layer (12), an ETFE first sidewall layer (12), a PU imitation leather first sidewall layer (12), a leather first sidewall layer (12), or a plastic first sidewall layer (12). The second sidewall layer (13) is a mesh fabric, an Oxford cloth, or a woven fabric.

7. An inflatable roller according to claim 1, characterized in that, The first inflation valve assembly (4) is disposed on the first end cap (2) or the second end cap (3); Alternatively, the first inflation valve assembly (4) is disposed on the circumferential sidewall (1); the circumferential sidewall (1) is recessed and provided with a second mounting groove (14), the second mounting groove (14) includes a flat middle part (141) and inclined parts (142) on both sides, and the first inflation valve assembly (4) is disposed on the middle part (141). Alternatively, it may also include a second inflation valve assembly (5), wherein the first inflation valve assembly (4) is disposed on the first end cap (2), and the second inflation valve assembly (5) is disposed on the second end cap (3).

8. An inflatable roller according to claim 1, characterized in that, The roller body (10) has a mounting port (101) for mounting the first inflation valve assembly (4), the first inflation valve assembly (4) comprising: Valve body (41), the valve body (41) is disposed in the inflation chamber (11) and connected to the inner wall of the roller body (10), the valve body (41) has an installation cavity (411) and a first air outlet (412) communicating with the installation cavity (411), the first air outlet (412) communicating with the inflation chamber (11); The inner core (42) is located in the mounting cavity (411) and connected to the inner wall of the valve body (41). The bottom of the inner core (42) has a second air outlet (421) for communicating with the first air outlet (412), and the top of the inner core (42) has an air inlet (422) for communicating with the second air outlet (421). One-way valve core assembly (6), the one-way valve core assembly (6) is used to open or close the second air outlet (421) so that gas can pass sequentially through the air inlet (422), the second air outlet (421), the first air outlet (412) and the inflation chamber (11); The valve body (41) has a third internal thread (413) on its inner wall, and the inner core (42) has a third external thread (423) on its outer wall for engaging with the third internal thread (413). The valve body (41) has a plurality of first air outlets (412), which are arranged in a ring array on the valve body (41). The width of the first air outlets (412) gradually increases from the inner wall of the valve body (41) toward the outer wall of the valve body (41). The outer wall of the inner core (42) is recessed with a first sealing groove (424), and the first sealing groove (424) is provided with a first sealing ring (4241) for sealing the gap between the outer wall of the inner core (42) and the inner wall of the valve body (41).

9. An inflatable roller according to claim 8, characterized in that, The first inflation valve assembly (4) further includes a valve cover (43), which is used to open or close the air inlet (422); the air inlet (422) of the inner core (42) is provided with a locking rod (425), and the bottom end of the valve cover (43) is provided with a spiral-shaped first locking block (431) and a second locking block (432), which are respectively locked with the locking rod (425); the top end of the valve cover (43) is provided with a push rod (433), which is used to open or close the air inlet (422); 433) includes a first push arm (4331) and a second push arm (4332) arranged in opposite directions; the top of the inner core (42) is provided with a first stop block (426) and a second stop block (427) opposite to each other. When the push rod (433) is pushed until the first locking block (431) and the second locking block (432) are respectively locked with the locking rod (425), the first push arm (4331) abuts against the first stop block (426) and the second push arm (4332) abuts against the second stop block (427). The one-way valve core assembly (6) includes a connecting sleeve (61) disposed in the middle of the snap-fit ​​rod (425), a valve stem (62) movably disposed within the connecting sleeve (61), a valve plug (63) connected to the bottom end of the valve stem (62), and a spring (64) sleeved on the valve stem (62). A limiting member (65) is connected to the top of the valve stem (62), the top end of the spring (64) abuts against the limiting member (65), and the bottom end of the spring (64) abuts against the bottom wall inside the connecting sleeve (61). The valve plug (63) is close to the... A second sealing ring (631) is provided on one side of the inner core (42), and the second sealing ring (631) is used to seal the gap between the valve plug (63) and the bottom end of the inner core (42); the limiting member (65) includes a limiting part (651) and a connecting part (652), the connecting part (652) is provided with a second external thread (6521), and the upper end of the valve stem (62) has a first mounting groove (621), and the first mounting groove (621) is provided with a second internal thread (6211) that mates with the second external thread (6521); The inner core (42) is also provided with a third sealing ring (428) at the top. The third sealing ring (428) is located between the valve cover (43) and the top of the inner core (42). The third sealing ring (428) is used to seal the gap between the valve cover (43) and the inner core (42). The top of the inner core (42) near the third sealing ring (428) is provided with a hollow ring groove (429). The hollow ring groove (429) is provided with a number of reinforcing ribs (4291). The reinforcing ribs (4291) are arranged in a ring array in the hollow ring groove (429).

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