Cloth bag type kettle bell

Abstract

The utility model discloses a cloth bag type kettle-bell which comprises a lining bag, an arch-shaped bent pipe, filler and a cloth outer wrapper. The lining bag is provided with a three-dimensional filling cavity, and the filler is filled in the filling cavity; the filling cavity has the width W continuously changing in the height direction and the thickness t continuously changing in the height direction, the width W and the thickness t synchronously change in the height direction, the change trend is that the width W and the thickness t continuously become larger from bottom to top and then continuously become smaller, the width W is larger than the thickness t, the arch-shaped bent pipe is sewn on the outer side of the lining bag in the width direction, and the arch-shaped bent pipe is sewn on the outer side of the lining bag in the width direction. The arched bent pipe comprises supporting parts located on the two sides of the lining bag and a bent handle part located on the upper portion of the lining bag. The bent handle part, the supporting part and the lining bag are wrapped by the fabric outer wrapping leather; therefore, the kettle-bell is excellent in structural integration and highly unified in appearance and function.

Description

Technical Field

[0001] The utility model relates to the field of sports equipment, in particular to a cloth bag type kettlebell with a filler inside and a cloth cover outside. Background Art

[0002] Kettlebells are a popular fitness equipment in recent years. They look like a spherical iron block with a handle. The handle is usually located at the top of the sphere, making it easy for users to hold and perform various exercises. Kettlebells can be divided into the following categories based on their surface material:

[0003] The first type: a hard kettlebell. This type of kettlebell is characterized by its size changing with weight. The weight is usually fixed and increases in 2kg increments, such as 4kg, 6kg, and 8kg. Hard kettlebells typically have wide handles made of iron or hard plastic, ensuring even weight distribution and stability.

[0004] The second type: soft kettlebells, which have become more popular in the past two years and are mainly used at home. They are made of rubber or similar materials and are filled with particles or sand.

[0005] The third type: a kettlebell that combines soft and hard, such as the kettlebell with publication number CN118045326A, which is drop-resistant and unbreakable. It includes a hard plastic shell. The spherical outer shell on the hard plastic shell is retracted inward by 6 mm from below 1 / 3 of its height. A layer of soft plastic shell is installed outside the retracted part. The hard plastic shell is filled with concrete filler. The soft plastic shell can prevent damage to the use site.

[0006] For example, CN306980294S discloses a denim kettlebell covered with fabric, while the inner kettlebell itself is still a hard kettlebell. The soft-surface kettlebell is suitable for home exercise and will not damage floors, tiles, etc. There is also a simple cloth bag kettlebell, where the cloth bag simply serves as the outer covering of the filling. The protective layer and the main body of the kettlebell do not form a unified and coordinated structure. The additional protective layer is physically and functionally separated from the main structure of the kettlebell, resulting in poor structural coherence. Utility Model Content

[0007] Based on the traditional kettlebell with a protective outer layer, the protective layer and the main body of the kettlebell do not form a unified and coordinated structure, and the structural consistency is poor. The technical problem to be solved by the utility model is to provide a new type of cloth bag-type kettlebell with excellent structural integration and highly unified appearance and function, while avoiding the structural separation and instability in use caused by the traditional additional protective layer.

[0008] The core technical concept of this utility model is to provide a cloth bag-type kettlebell with a coherent structure and highly unified function and appearance. Through the innovative arched bent tube and three-dimensional deformable filling cavity structure, it achieves a perfect combination of personalized training needs and home use safety, while improving the durability and environmental performance of the product.

[0009] The technical solution adopted by the utility model to solve the above technical problems is: a cloth bag type kettlebell, comprising an inner lining bag, an arched curved tube, a filler and a cloth outer covering;

[0010] The liner bag has a three-dimensional filling cavity, and the filler is placed in the filling cavity;

[0011] The filling cavity has a width W that continuously changes in the height direction and a thickness t that continuously changes in the height direction. The width W and thickness t change synchronously in the height direction, and the change trend is that the width W and thickness t continuously increase from bottom to top and then continuously decrease, and the width W>thickness t.

[0012] The arched curved tube is sewn on the outer side of the liner bag in the width direction, and the arched curved tube includes support portions located on both sides of the liner bag and a curved handle portion located on the upper part of the liner bag;

[0013] The fabric outer covering wraps the curved handle portion, the supporting portion and the inner lining bag.

[0014] A further preferred technical solution of the present invention is that the width W is in the range of 15-35 cm, and the thickness t is in the range of 2-10 cm.

[0015] A further preferred technical solution of the present invention is that a distance is left between the lower end of the support portion and the bottom of the liner bag, and the shape of the filling in the liner bag changes when it is lifted and left to stand.

[0016] A further preferred technical solution of the present invention is that the arched curved pipe is sewn into the arched pipe sleeve outside the inner liner bag.

[0017] A further preferred technical solution of the present invention is that the liner bag is a woven bag.

[0018] A further preferred technical solution of the present invention is that the filler is a mixture of steel balls, iron sand and polystyrene particles.

[0019] A further preferred technical solution of the present invention is: the arched curved pipe is formed by bending a hollow steel pipe, and the outer fabric cover is a skin-friendly Lycra fabric.

[0020] Another topic: a cloth bag-type kettlebell, including an inner bag, an arched bend, padding and a cloth outer covering;

[0021] The liner bag includes a three-dimensional filling cavity and a clearance area for the hand to pass through, and the filling material is accommodated in the filling cavity;

[0022] The arched curved tube is fixed to the outer peripheral side of the liner bag, and the arched curved tube includes a curved handle portion and two side support portions, the curved handle portion is located on the upper side of the air avoidance area to form a grip portion, and the support portions are located on both sides of the liner bag to limit the filling from moving toward both sides;

[0023] The first and second deformable surfaces both have a width W that continuously changes in the height direction and a thickness t that continuously changes in the height direction. The width W and thickness t change synchronously in the height direction, and their changing trends are that the width W and thickness t continuously increase from bottom to top and then continuously decrease, and the width W>thickness t;

[0024] The outer fabric covering covers the inner liner bag fixed with the arched curved pipe and avoids the air-avoidance area.

[0025] A further preferred technical solution of the present invention is that the bottom end of the support portion is a distance away from the bottom of the liner bag to form a deformable area in the bottom area of the kettlebell;

[0026] When the kettlebell is lifted or lowered, the shape of the deformable area changes.

[0027] A further preferred technical solution of the present invention is that: the filling cavity has a cross-sectional area s that continuously changes in the height direction, and the changing trend is that it continuously increases from bottom to top and then continuously decreases;

[0028] The filling cavity includes a first deformable surface, a second deformable surface and a bottom surface, wherein the bottom surface and lower areas of the first and second deformable surfaces form a deformable area of the bottom of the kettlebell;

[0029] The first and second deformable surfaces are in close contact with the filler so that the surface morphology is adjusted synchronously with the movement of the filler.

[0030] A further preferred technical solution of the present invention is: the value range of the width W is 15-35 cm, and the value range of the thickness t is 2-10 cm;

[0031] The filling at the bottom of the liner bag will move when it is lifted and left to rest.

[0032] A further preferred technical solution of the present invention is: an arched tube sleeve is provided on the outside of the liner bag, and the arched elbow is fixed in the arched tube sleeve; the arched tube sleeve is a woven fabric, and the caliber of the arched tube sleeve matches the caliber of the arched elbow.

[0033] A further preferred technical solution of the present invention is: the inner liner bag is a woven bag; the filler is a mixture of steel balls, iron sand and polystyrene particles; the arched elbow is formed by bending a hollow steel pipe, and the fabric outer sheath is a skin-friendly Lycra fabric.

[0034] Compared with the existing technology, the advantages of this utility model are: by sewing the arched curved tube to the outside of the inner lining bag and designing the fabric outer cover to wrap the entire structure, including the curved handle, support portion, and inner lining bag, this solution achieves a unified and coordinated structure between the protective layer and the kettlebell body, significantly improving the structural consistency and avoiding the sense of separation and instability caused by traditional additional protective layers. In addition, the design of the cloth bag kettlebell not only optimizes the product's aesthetics, but also provides a more comfortable and beautiful user experience through the organic combination of the arched curved tube and the fabric outer cover, achieving a high degree of unity between function and appearance. Furthermore, the matching design between the arched curved tube and the arched tube sleeve, as well as the wrapping of the fabric outer cover, effectively avoids the possibility of slipping during use, enhancing stability and safety during use.

[0035] This bag-shaped kettlebell, through its unique filling cavity, achieves a continuous change in width W and thickness t across its height. This design not only optimizes force transfer and dynamic adaptability but also increases training diversity. Users can experience a natural coordination between the kettlebell and their movements during various lifts, swings, and other exercises, thereby enhancing training effectiveness. Furthermore, this design allows the filling to flow freely within the inner bag to accommodate various training positions, providing users with a more diverse and challenging training method.

[0036] The arched tube and handle are designed with ergonomic principles in mind, providing a comfortable grip and a stable support structure. The use of hollow steel tubes reduces the weight of the kettlebell while ensuring sufficient strength and durability. The fabric cover not only enhances the kettlebell's appearance but also provides a better grip and additional protection, preventing damage to the kettlebell or hands during training, making the kettlebell more suitable for prolonged and intensive use.

[0037] Furthermore, users can choose the appropriate kettlebell weight for personalized training based on their training goals and strength level. The fluid nature of the filling and the presence of a deformable zone ensure that the kettlebell effectively absorbs impact when it contacts the ground, reducing damage to floors or tiles, while also reducing noise during use and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings are merely schematic representations of the composition or structure of the depicted objects and may contain exaggerated representations. Furthermore, the drawings are not necessarily drawn to scale.

[0039] Figure 1 This is a schematic diagram of the overall state of the bag-type kettlebell when it is lifted;

[0040] Figure 2 This is a schematic diagram of the overall state of the bag-type kettlebell when it is put down;

[0041] Figure 3 This is a side view of the bag-type kettlebell of this embodiment;

[0042] Figure 4 This is a top schematic diagram of the bag-type kettlebell of this embodiment;

[0043] Figure 5 is a side sectional view of the bag-type kettlebell of this embodiment;

[0044] Figure 6 This is a side cross-sectional view of a bag-type kettlebell when it is lifted;

[0045] Figure 7 A side cross-sectional view of a bag-type kettlebell lowered. DETAILED DESCRIPTION

[0046] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0047] like Figures 1 to 4 As shown, a cloth bag kettlebell 100 includes an inner liner bag 10, an arched curved tube 20, a filler 30, and a cloth outer cover 40. The inner liner bag 10 is made of a highly wear-resistant material and has a three-dimensional filling cavity 11 and a hand clearance area h. The filler 30 is loaded into the filling cavity 11; the three-dimensional structure of the filling cavity 11 provides additional support for the filler 30.

[0048] A hand-accessible area h is located on the inner liner 10, providing a comfortable and stable grip for the user while using the kettlebell 100. The shape and size of the hand-accessible area h are ergonomically designed to ensure a comfortable grip in various training positions.

[0049] The filler 30 can remain stable in the liner bag 10 while allowing a certain degree of fluidity to adapt to different training movements and diverse gripping methods of trainers.

[0050] The fabric outer covering 40 wraps the arched curved tube 20, the supporting portion 21 and the inner lining bag 10 as a whole, avoiding the air-avoidance area h, and ensuring the continuity and unity of the overall structure.

[0051] The arched curved tube 20 plays a crucial role in the bag-type kettlebell 100 of the present invention. Figure 5 As shown, the arched curved tube 20 is fixed on the outer peripheral side of the liner bag 10 , and the arched curved tube 20 is composed of two parts: a curved handle part 22 and two side support parts 21 .

[0052] The curved handle 22 is located above the air-clearance area h to form a grip, providing an ergonomic grip point for the user. This ensures that the user can hold the kettlebell 100 stably while performing various exercises, reducing hand fatigue and potential injury risks.

[0053] The support portions 21 are located on both sides of the liner bag 10 to limit the movement of the filler to the sides, thereby maintaining the balance of the kettlebell 100 during use and helping to prevent unnecessary left and right movement of the filler inside the kettlebell, thereby avoiding affecting the stability of the kettlebell and the effectiveness of training.

[0054] Preferably, the arched bend 20 is formed by bending a hollow steel pipe. This material selection not only ensures the strength and durability of the arched bend, but also reduces the weight of the kettlebell, making it more suitable for long-term use.

[0055] Based on the above technical means, the arched curved tube 20 plays a key role in improving the integrity, stability and user experience of the bag-type kettlebell 100.

[0056] like Figures 5 to 7 As shown, the filling cavity 11 has a continuously varying cross-sectional area s in the height direction, increasing from bottom to top and then decreasing continuously. This continuously varying cross-sectional area can better adapt to the needs of different training movements and provide a more natural weight distribution. Furthermore, the flow properties of the filler within the deformable region f, combined with the continuously varying cross-sectional area, can provide improved dynamic response to accommodate different exercise patterns.

[0057] Furthermore, the filling chamber 11 has a continuously varying width W and thickness t in the height direction. The width W and thickness t vary synchronously in the height direction, increasing from bottom to top and then decreasing continuously, with width W > thickness t. This dimensioning of the filling chamber 11 helps optimize the weight distribution of the kettlebell, allowing the flow properties of the filling material 30 to play a greater role during training while maintaining the kettlebell's balance.

[0058] The continuously changing design of the width W and thickness t of the filling cavity 11 enables the filler 30 to generate dynamic adaptability within the liner bag 10, thereby providing better adaptability and stability in different usage postures and training movements.

[0059] The curved handle 22, combined with the dimensional variation of the filling cavity 11, helps improve user comfort and control when gripping the kettlebell. Furthermore, the fluid nature of the filling 30 and the filling cavity 11 reduce direct impact of the filling on the liner bag 10, protecting the floor and extending the life of the kettlebell.

[0060] The continuous change in filling chamber 11 creates a more fluid and dynamic visual appearance, enhancing the aesthetic appeal of the product. Furthermore, the design of filling chamber 11 allows manufacturers to fill kettlebells with mixtures of varying weights to create kettlebells of varying specifications. Users can choose kettlebells of varying weights based on their training needs and preferences, achieving personalized training.

[0061] In addition, the combination of the mixed properties of the filler 30 and the filling cavity 11 can absorb the impact force through the deformation of the deformable area f when the kettlebell contacts the ground, reduce damage to the floor or tiles, and improve safety in use.

[0062] It should also be noted that the use of a fabric outer covering 40 not only increases the kettlebell's durability but also provides an additional layer of protection for the inner liner 10 and arched curved tube 20, reducing wear and potential damage. By wrapping the curved handle 22 and support 21, the fabric outer covering 40 provides a softer and more comfortable grip. The design of the free-fall area h allows the hand to pass naturally through, providing a stable grip. The use of the fabric outer covering 40 improves the kettlebell's overall appearance, giving it a more refined and professional look and enhancing its aesthetic appeal.

[0063] The fabric cover 40 wraps around the handle and support, enhancing the overall stability of the structure. Preferably, the material properties of the fabric cover 40 are selected to provide better grip friction, helping the user maintain stability and reduce hand slippage when using the kettlebell for various exercises. It also increases friction between the fabric cover 40 and the arched curved tube 20.

[0064] Preferably, the width W is in the range of 15-35 cm, the thickness t is in the range of 2-10 cm, and the thickness t accounts for 1 / 2-1 / 5 of the width W; more preferably, the width W is 24-25 cm and the thickness t is 5 cm. Optimize the distribution of the filler inside the kettlebell to achieve a more even weight distribution and provide a more balanced training experience. In one case, a smaller proportion of the thickness t to the width W helps reduce the swing of the kettlebell during exercise and reduces the risk of injury during use. In another case, a larger thickness t helps to distribute the weight of the kettlebell more evenly, especially when swinging or other movements that require the kettlebell to swing. In addition, a larger thickness t can provide a larger bottom support area, thereby increasing the stability of the kettlebell during use and reducing the risk of tipping.

[0065] Manufacturers can adjust the thickness t to width W ratio based on user feedback and market research to meet the specific needs of different user groups, such as professional athletes, fitness enthusiasts, and rehabilitation trainers. This flexible adjustment of the thickness t ratio allows kettlebell designs to quickly respond to market changes, seize emerging trends, and meet the needs of emerging markets.

[0066] In the cloth bag kettlebell of this invention, a certain distance is intentionally maintained between the bottom end of the support portion 21 and the bottom of the liner bag 10. This creates a deformable area f at the bottom of the kettlebell. This unique structure allows the deformable area f to adaptively change shape when the kettlebell is lifted or lowered, providing a more dynamic and interactive training experience.

[0067] The preferred filler 30 is a mixture of steel balls, iron sand, and polystyrene particles, which exhibits a certain degree of fluidity within the flexible liner bag 10. The filler 30 at the bottom of the liner bag 10 moves when lifted and when left stationary. When the kettlebell is lowered and its bottom contacts the ground, the deformable region f absorbs the impact force by protruding outward from the first and second deformable surfaces s1 and s2, increasing the width and decreasing the length of the entire liner bag 10, thereby achieving a good cushioning effect. The bottom surface s3 remains relatively stable, undergoing only minor deformation, serving as a solid support base.

[0068] Conversely, when the kettlebell is lifted, the first and second deformable surfaces s1 and s2 contract inward as the filler 30 tightens, causing the entire liner bag 10 to decrease in width and increase in length. This design not only enhances the functionality of the kettlebell, but also improves its comfort and safety, while ensuring stability and adaptability in different usage situations.

[0069] Through this optimization, the description more clearly conveys the design intention and actual effect of the deformable zone f, while emphasizing the impact of the fluidity of the filler 30 on the training experience.

[0070] More specifically, the filling cavity 11 includes a first deformable surface s1, a second deformable surface s2 and a bottom surface s3. The bottom surface s3 and the lower areas of the first and second deformable surfaces form a deformable region f at the bottom of the kettlebell.

[0071] Specifically, when the kettlebell is raised or lowered, the first deformable surface s1 and the second deformable surface s2 will closely conform to the filler 30 and adjust their shape accordingly. This synchronization ensures that as the filler moves within the liner bag 10, the deformable area f can flexibly expand or contract, allowing the filler to be redistributed in different directions, enhancing the dynamic adaptability of the kettlebell and the versatility of training.

[0072] Furthermore, it helps improve grip comfort and control during various training movements. For example, during swinging or lifting movements, the fluid nature of the filler 30 allows the kettlebell to adapt to the user's movements and force output, providing a more personalized and efficient training experience.

[0073] Preferably, the arched bend 20 is formed by bending a hollow steel tube. This hollow steel tube not only provides the necessary strength and stability, but also, due to its hollow structure, reduces the kettlebell's weight while maintaining structural strength, thereby improving its durability. The fabric cover 40 is made of skin-friendly Lycra fabric. This material, known for its high elasticity and excellent resilience, provides a better grip and comfort, reducing hand discomfort or injury during training. Furthermore, Lycra fabric offers the characteristics of free stretch and wrinkle recovery, making the kettlebell not only highly functional but also aesthetically pleasing, making it suitable for a variety of usage scenarios.

[0074] Preferably, the liner bag 10 is a woven bag. An arched sleeve 13 is provided on the outside of the liner bag 10, and the arched curved pipe 20 is secured within the arched sleeve 13. The caliber of the arched sleeve 13 matches the caliber of the arched curved pipe 20. The woven bag liner 10 provides additional strength and durability, while the arched sleeve 13 provides a secure outer support for the arched curved pipe 20.

[0075] Preferably, the arched tube sleeve 13 is a woven fabric, and the arched curved tube 20 does not directly contact the fabric outer sheath 40. Instead, the fabric outer sheath of the arched curved tube 20 is in contact with the arched tube sleeve 13, forming a large friction between the two to avoid slipping between the arched curved tube 20 and the fabric outer sheath 40.

[0076] In summary, the matching calibers of the arched tube sleeve 13 and the arched curved tube 20 ensure structural integrity, enabling the various components to work together and provide a more stable and consistent user experience. Furthermore, the arched tube sleeve 13 is not only functional but also protective and decorative, protecting the arched curved tube 20 while creating a unified and harmonious design with the fabric outer cover 40.

[0077] Furthermore, based on the material properties of the woven bag and the arched pipe sleeve 13, the liner bag 10 and the arched elbow 20 can adapt to different usage environments and maintain good performance regardless of wet or dry conditions.

[0078] During use, the user can easily pass their hand through the specially designed free space h and firmly grasp the curved handle portion 22 of the arched curved tube 20. This gripping method conforms to ergonomic principles and ensures comfort and stability. The filling material 30 within the liner bag 10 provides an adjustable weight function based on different weight configurations, allowing users to effectively exercise specific muscle groups.

[0079] This technology allows users to select kettlebells of varying weights based on their training needs and fitness levels, enabling personalized training plans. Whether it's strength gains, muscular endurance improvements, or balance and coordination training, users can achieve targeted muscle stimulation and training results with the right kettlebell weight. Furthermore, this flexible design of the bag-shaped kettlebell not only enhances the scientific nature and effectiveness of training, but also greatly expands its potential for application in various fitness scenarios.

[0080] In the description of this utility model, it should be noted that the terms "upper," "lower," "front," "back," "left," "right," "inner," and "outer" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this utility model. The terms "first" and "second" are used solely to facilitate understanding and have no other directional meanings, and should not be construed as limitations on this utility model.

[0081] The above describes the cloth bag kettlebell provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The above examples are intended only to facilitate understanding of the present invention and its core concepts. It should be noted that those skilled in the art may, without departing from the principles of the present invention, make various improvements and modifications to the present invention, and such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A bag-shaped kettlebell, characterized by: Includes liner bag, arch elbow, padding and fabric cover; The liner bag has a three-dimensional filling cavity, and the filler is placed in the filling cavity; The filling cavity has a width W that continuously changes in the height direction and a thickness t that continuously changes in the height direction. The width W and thickness t change synchronously in the height direction, and the change trend is that the width W and thickness t continuously increase from bottom to top and then continuously decrease, and the width W>thickness t. The arched curved tube is sewn on the outer side of the liner bag in the width direction, and the arched curved tube includes support portions located on both sides of the liner bag and a curved handle portion located on the upper part of the liner bag; The fabric outer covering wraps the curved handle portion, the supporting portion and the inner lining bag.

2. The bag-shaped kettlebell according to claim 1, characterized in that: The width W ranges from 15 to 35 cm, and the thickness t ranges from 2 to 10 cm.

3. The bag-shaped kettlebell according to claim 1, characterized in that: There is a distance between the lower end of the supporting portion and the bottom of the liner bag, and the shape of the filling in the liner bag will change when it is lifted and left to stand.

4. The bag-shaped kettlebell according to claim 1, characterized in that: The arched curved pipe is sewn into the arched pipe sleeve outside the liner bag.

5. The bag-shaped kettlebell according to claim 1, characterized in that: The liner bag is a woven bag.

6. The bag-shaped kettlebell according to claim 1, characterized in that: The filler is a mixture of steel balls, iron sand and polystyrene particles.

7. The bag-shaped kettlebell according to claim 1, characterized in that: The arched curved pipe is formed by bending a hollow steel pipe, and the outer fabric cover is made of skin-friendly Lycra fabric.

8. A bag-shaped kettlebell, characterized by: Includes liner bag, arch elbow, padding and fabric cover; The liner bag includes a three-dimensional filling cavity and a clearance area for the hand to pass through, and the filling material is accommodated in the filling cavity; The arched curved tube is fixed to the outer peripheral side of the liner bag, and the arched curved tube includes a curved handle portion and two side support portions, the curved handle portion is located on the upper side of the air avoidance area to form a grip portion, and the support portions are located on both sides of the liner bag to limit the filling from moving toward both sides; The filling cavity has a width W that continuously changes in the height direction and a thickness t that continuously changes in the height direction. The width W and thickness t change synchronously in the height direction. The width W and thickness t continuously increase from bottom to top and then continuously decrease. The width W>thickness t. The outer fabric covering covers the inner liner bag fixed with the arched curved pipe and avoids the air-avoidance area.

9. The bag-shaped kettlebell according to claim 8, characterized in that: The bottom end of the support portion is a distance away from the bottom of the liner bag to form a deformable area in the bottom area of the kettlebell; When the kettlebell is lifted or lowered, the shape of the deformable area changes.

10. The bag-shaped kettlebell according to claim 8, characterized in that: The filling cavity has a cross-sectional area s that continuously changes in the height direction, and the changing trend is that it continuously increases from bottom to top and then continuously decreases; The filling cavity includes a first deformable surface, a second deformable surface and a bottom surface, wherein the bottom surface and lower areas of the first and second deformable surfaces form a deformable area of the bottom of the kettlebell; The first and second deformable surfaces are in close contact with the filler so that the surface morphology is adjusted synchronously with the movement of the filler.

11. The bag-shaped kettlebell according to claim 8, characterized in that: The width W ranges from 15 to 35 cm, and the thickness t ranges from 2 to 10 cm; The filling at the bottom of the liner bag will move when it is lifted and left to rest.

12. The bag-shaped kettlebell according to claim 8, characterized in that: An arched pipe sleeve is provided on the outer side of the liner bag, and the arched curved pipe is fixed in the arched pipe sleeve; the arched pipe sleeve is a braided fabric, and the caliber of the arched pipe sleeve matches the caliber of the arched curved pipe.

13. The bag-shaped kettlebell according to claim 8, characterized in that: The liner bag is a woven bag; The filler is a mixture of steel balls, iron sand and polystyrene particles; The arched curved pipe is formed by bending a hollow steel pipe, and the outer fabric cover is made of skin-friendly Lycra fabric.

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