A soft kettlebell made by slush molding

Abstract

The application discloses a soft kettle bell made by slush molding and roll molding, which comprises a soft kettle body, a pre-buried sleeve symmetrically arranged on the soft kettle body by slush molding and roll molding process, a stepped limiting step arranged in the pre-buried sleeve, mushroom-shaped reverse loops arranged at the lower ends of both sides of a hard handle, and a stepped limiting step arranged in the pre-buried sleeve, mushroom-shaped reverse loops arranged at the lower ends of both sides of a hard handle, and a stepped limiting step arranged in the pre-buried sleeve, mushroom-shaped reverse loops arranged at the lower ends of both sides of a hard handle, and a stepped limiting step arranged in the pre-buried sleeve, mushroom-shaped reverse loops arranged at the lower ends of both sides of a hard handle, and a stepped limiting step arranged in the pre-buried sleeve, mushroom-shaped reverse loops arranged at the lower ends of both sides of a hard handle, and a stepped limiting step arranged in the pre-buried sleeve, mushroom-shaped reverse loops arranged at the lower ends of both sides of a hard handle, and a stepped limiting step arranged in the pre-buried sleeve, mushroom-shaped reverse loops arranged at the lower ends of both sides of a

Description

Technical Field

[0001] This invention relates to the field of sports and fitness equipment technology, and in particular to a soft, rotatable kettlebell. Background Technology

[0002] Existing kettlebell products mainly fall into two categories: The first type consists of kettlebells made of metal or entirely rigid plastic. These are characterized by high rigidity and weight, resulting in strong impact upon drop, which can easily injure the user or damage the ground. Furthermore, their stiff grip makes them unsuitable for home use or family workouts. The second type is soft-body kettlebells made of slush molding. Although labeled "soft," these products are limited by a three-section molded one-piece molding process. The upper half of the kettle body (approximately 35%-50% of the total surface area) must be made of rigid PVC to fit the handle mold, while the lower half uses soft PVC. This results in the actual soft-body coverage area being only 50%-65% of the total surface area. During use, the hard areas of the kettle body still pose a significant risk of injury from impacts during swinging, catching, or throwing.

[0003] Furthermore, in the existing three-section molded one-piece molding process, the upper part of the soft kettle body is made of rigid PVC and the lower part is made of soft PVC. Due to the significant difference in shrinkage rate and fluidity between rigid PVC and soft PVC during the molding process, the joint between the two cannot be smoothly transitioned, which will inevitably form a hard, raised step structure on the surface of the kettle body. The edge of this step is sharp and the texture is hard. When the user swings, lifts, or catches the kettle bell, the wrist, the inside of the forearm, and other parts are very likely to repeatedly rub or hit the step, which poses serious safety hazards such as cuts and bumps.

[0004] Furthermore, the bottom of the existing molten plastic and rotomolded soft kettlebell is usually a smooth flat surface. Since there is a counterweight cavity inside the kettlebell and it is filled with counterweight sand and other heavy objects, under the long-term action of gravity, the bottom material will have local dents or indentations due to the concentrated pressure of the counterweight. This not only affects the appearance quality of the product, but also reduces the stability of the kettlebell when it is placed on the ground.

[0005] In existing technologies, the kettlebell handle is usually assembled with the kettle body in one piece or glued together. The connection strength is insufficient, and the handle is prone to loosening and falling off after long-term use, posing a safety hazard.

[0006] Most soft kettlebells on the market are pre-filled with counterweights at the factory, making it impossible for consumers to adjust the weight according to their exercise needs. Although a few solutions propose filling the kettlebell with counterweights through injection holes or valves, their sealing structure and assembly process are complex, and the kettle bodies are mostly made of rigid or semi-rigid materials, which are incompatible with the production process of slush molding and rotational molding soft kettle bodies. Therefore, this invention proposes a slush molding and rotational molding soft kettlebell to solve the problems existing in the prior art. Summary of the Invention

[0007] To address the aforementioned problems, the present invention aims to provide a soft, rotatable PVC kettlebell. This kettlebell features a separate, independent hard handle from the soft kettle body, simplifying assembly and increasing production efficiency. It is securely installed via a mushroom-shaped snap ring and a pre-embedded sleeve, ensuring it cannot be disassembled after assembly. The valve structure allows the product to be sold empty, significantly reducing packaging volume and transportation / storage costs. Consumers can also adjust the weight according to their needs, personalizing their workout intensity. The soft kettle body is molded from a single, soft material, eliminating the raised steps between the hard and soft PVC layers, thus avoiding the risk of injury from cuts or impacts. The large soft material coverage area further reduces the risk of bumps and injuries during exercise, while also providing a more comfortable grip.

[0008] To achieve the objectives of this invention, the following technical solution is provided: A soft-body kettlebell made by slush molding and rotational molding includes a soft kettle body, a pre-embedded sleeve, and a rigid handle. The soft kettle body is integrally formed with symmetrically arranged pre-embedded sleeves through slush molding or rotational molding. The pre-embedded sleeves have stepped limiting steps inside. The lower ends of both sides of the rigid handle are provided with mushroom-shaped inverted buckles. The mushroom-shaped inverted buckles are engaged and matched with the stepped limiting steps to fix the rigid handle to the pre-embedded sleeve. The soft kettle body is integrally formed from a single soft PVC material, and the rigid handle is injection molded from any one of the following rigid plastics: ABS, PP, PE, PA, PC / ABS alloy, POM, or PF bakelite.

[0009] Further improvements include: the outer surface of the soft kettle body has no raised steps formed by the combination of hard and soft materials, and the soft material covering the soft kettle body accounts for 75%-90% of the overall outer surface area of ​​the kettle bell.

[0010] A further improvement is made by providing a support plate between the rigid handles located on the upper side of the mushroom-shaped inverted ring. The lower side of the support plate fits against the upper side of the soft pot body to enhance the support force and anti-shaking stability between the two inserts on the rigid handles.

[0011] A further improvement is that the lowest end of the rigid handle is provided with an inverted platform, and the lower section of the rigid handle extends to the bottom end of the pre-embedded sleeve, so that the inverted platform is fastened and locked to the bottom end of the pre-embedded sleeve.

[0012] A further improvement is made in that: a counterweight cavity is provided inside the soft kettle body, and the counterweight cavity is filled with counterweight sand. An air nozzle structure is provided on the wall of the soft kettle body. The air nozzle structure is also installed with the soft kettle body through a pre-embedded sleeve. Its installation structure is the same as that of the rigid handle. It is matched with the step limit step by a mushroom-shaped buckle and is used to inflate the counterweight cavity and fill it with counterweight sand.

[0013] Further improvements are made in the following aspects: The nozzle structure includes a nozzle body, a mushroom-shaped buckle ring, an integrated flexible connecting strip, a sealing plug, an elastic locking buckle, and a soft elastic sheet. The nozzle body is provided with a mushroom-shaped buckle ring, which is inserted into the pre-embedded sleeve for locking. A sealing plug is provided on one side of the upper part of the nozzle body through the integrated flexible connecting strip. An elastic locking buckle is provided on one side of the lower end of the nozzle body. A soft elastic sheet is provided on the elastic locking buckle. The soft elastic sheet fits unidirectionally with the lower opening of the nozzle body.

[0014] A further improvement is that the bottom surface of the soft kettle body is provided with anti-slip texture, which is any one or more of the following: circular texture, radial texture, or grid texture, and is integrally formed with the soft kettle body by rotational molding.

[0015] The beneficial effects of the present invention are as follows: the rigid handle and the soft body of the pot are separate and independent, the assembly is simple and the production efficiency is high. The assembly is firm because it is installed by clamping the mushroom-shaped buckle with the pre-embedded sleeve. After the assembly is completed, it cannot be disassembled or detached.

[0016] The soft kettle body is made of a single soft material in one piece, without the raised steps at the junction of hard PVC and soft PVC, avoiding the risk of injury caused by cuts and bumps from steps. At the same time, the large coverage area of ​​the soft material greatly reduces the risk of bumps and falls during exercise, while also making it more comfortable to hold and effectively cushioning the impact when dropped, significantly improving the protection of users, floors and surrounding objects.

[0017] The rigid handle is connected by a support strip, which significantly improves the overall torsional strength and lateral stiffness of the rigid handle, prevents the handle from wobbling during exercise, and improves the stability and safety of use.

[0018] The valve design allows the product to be sold in an empty bottle, significantly reducing packaging volume and transportation and storage costs. At the same time, consumers can adjust the weight according to their own needs to personalize their workout. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0020] Figure 2 This is a front sectional view of the present invention.

[0021] Figure 3 This is an enlarged cross-sectional view of the nozzle structure of the present invention.

[0022] The components include: 1. Soft kettle body; 2. Pre-embedded sleeve; 3. Rigid handle; 4. Stepped limiting step; 5. Mushroom-shaped inverted buckle ring; 6. Support plate; 7. Counterweight cavity; 8. Air nozzle body; 9. Integrated soft connecting strip; 10. Sealing plug; 11. Elastic plate locking buckle; 12. Soft elastic plate; 13. Anti-slip texture; 14. Inverted platform. Detailed Implementation

[0023] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0024] according to Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a soft slush molding kettlebell, including a soft kettle body 1, a pre-embedded sleeve 2, and a rigid handle 3. The pre-embedded sleeve 2 is integrally formed and symmetrically provided on the soft kettle body 1 by slush molding or rotational molding process. The pre-embedded sleeve 2 has a stepped limiting step 4 inside. The lower ends of both sides of the rigid handle 3 are provided with mushroom-shaped buckle rings 5. The mushroom-shaped buckle rings 5 ​​are engaged and matched with the stepped limiting step 4 so that the rigid handle 3 is inserted and fixed to the pre-embedded sleeve 2. The soft kettle body 1 is integrally formed from a single soft PVC material, and the rigid handle 3 is injection molded from any one of the rigid plastics selected from ABS, PP, PE, PA, PC / ABS alloy, POM, or PF bakelite.

[0025] Among them, ABS has balanced overall performance and good surface quality, making it suitable for handles with high appearance requirements; PP has the lowest cost and good chemical resistance, making it suitable for daily light-load scenarios; PA (nylon) has high strength, wear resistance, and fatigue resistance, and its rigidity and heat resistance are further improved after glass fiber reinforcement; PC / ABS alloy combines the high strength of PC and the easy processing of ABS; POM has good rigidity and high dimensional accuracy, making it suitable for precision structural parts; PF bakelite has excellent heat resistance and is suitable for occasions that may be exposed to high temperatures.

[0026] The outer surface of the soft kettle body 1 has no raised steps formed by the combination of hard and soft materials, and the soft material covering area of ​​the soft kettle body 1 accounts for 75%-90% of the overall outer surface area of ​​the kettle bell.

[0027] Because the entire surface of the soft-bodied kettle is uniformly soft and there is no interface between rigid and soft PVC, the hard raised steps that are inevitably caused by the difference in material hardness in traditional processes are fundamentally eliminated.

[0028] Because the rigid handle and the soft kettle body are mass-produced separately and then assembled and locked together, the soft kettle body does not need to reserve a rigid molding area to fit the handle mold. Therefore, the soft kettle body can be molded entirely from a single soft material. In the final product, the soft material covers 75%-90% of the overall surface area of ​​the kettlebell, while the rigid part is only the area where the rigid handle is located (about 10%-25%). Compared with the traditional soft kettlebell where the soft material accounts for only 50%-65%, the soft material coverage ratio in this embodiment is increased by more than 20%. All impact surfaces that the user may come into contact with the kettlebell are made of soft material, which greatly reduces the risk of bumps and injuries during exercise, while also making the grip more comfortable.

[0029] A support plate 6 is provided between the rigid handle 3 on the upper side of the mushroom-shaped inverted ring 5 to form an integral frame reinforcement. The lower side of the support plate 6 fits against the upper side of the soft kettle body 1 to enhance the support force and anti-shaking stability between the two inserts on both sides of the rigid handle 3, making the kettlebell more stable and reliable when used in dynamic processes such as swinging and shaking. The support plate can be integrally injection molded with the rigid handle, without the need for additional parts and assembly processes.

[0030] The rigid handle 3 has an inverted platform 14 at its lowest end. The lower section of the rigid handle 3 extends to the bottom of the pre-embedded sleeve 2, so that the inverted platform 14 is locked to the bottom of the pre-embedded sleeve 2.

[0031] The soft kettle body 1 has a counterweight cavity 7 inside, which is filled with counterweight sand. The soft kettle body 1 has an air nozzle structure on its wall. The air nozzle structure is also installed on the soft kettle body 1 through a pre-embedded sleeve 2. Its installation structure is the same as that of the rigid handle 3. It is matched with the step limit step 4 by a mushroom-shaped buckle 5, which is used to inflate the counterweight cavity 7 and fill it with counterweight sand.

[0032] The nozzle structure includes a nozzle body 8, a mushroom-shaped buckle 5, an integrated flexible connecting strip 9, a sealing plug 10, an elastic locking buckle 11, and a soft elastic sheet 12. The nozzle body 8 is provided with a mushroom-shaped buckle 5, which is inserted into the pre-embedded sleeve 2 for locking. The upper side of the nozzle body 8 is provided with a sealing plug 10 through the integrated flexible connecting strip 9. The lower side of the nozzle body 8 is provided with an elastic locking buckle 11, and the elastic locking buckle 11 is provided with a soft elastic sheet 12. The soft elastic sheet 12 is unidirectionally fitted with the lower opening of the nozzle body 8.

[0033] The valve structure is either a one-way valve or an openable / closable valve. Consumers can inflate the kettle body with air through the valve, causing the empty kettle to expand and solidify into a kettlebell shape. After opening the valve, consumers can fill the kettle body with water, fine sand, steel shot, or other weights according to their exercise needs, allowing for free weight adjustment. When not in use, the valve can be opened to release the internal gas, and the kettle body can be folded for storage, saving space. Based on the above structure, the product can be packaged, transported, and sold in an empty, deflated state, significantly reducing packaging volume and transportation costs.

[0034] The bottom surface of the soft kettle body 1 is provided with anti-slip texture 13. The anti-slip texture 13 is any one or more of the following: circular texture, radial texture, or grid texture, and is integrally formed with the soft kettle body 1 by slush molding.

[0035] The anti-slip texture has multiple functions: the anti-slip texture structure visually breaks the monotony of the bottom plane, making the slight bottom indentations that may be caused by the gravity pressure of the counterweight cavity less noticeable; the anti-slip texture protrusions increase the coefficient of friction between the bottom and the ground, making the kettlebell more slip-resistant and less likely to roll or slide when placed; the anti-slip texture structure enhances the local wall thickness and structural strength of the bottom area, resisting the pressure deformation caused by the counterweight to a certain extent.

[0036] During assembly, the insert section of the rigid handle is axially pressed into the pre-embedded sleeve. The mushroom-shaped inverted buckle reaches the stepped limit step inside the pre-embedded sleeve and springs open to lock. The lower inverted platform abuts against the bottom plane of the pre-embedded sleeve to complete the locking and fitting. The pre-embedded sleeve cools and shrinks to hold the mushroom-shaped inverted buckle tightly, and the handle is permanently locked and fixed, and cannot be pulled out. The finished kettlebell is mostly soft, with only the rigid handle being made of rigid material, making it suitable for fitness use. The rigid handle and the soft kettle body are mass-produced separately, and the finished product can be assembled by simple pressing later.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soft kettlebell made by slush molding and rotation, characterized in that: The kettle body (1) includes a soft body (1), a pre-embedded sleeve (2) and a rigid handle (3). The soft body (1) is integrally formed by slush molding or rotational molding and the pre-embedded sleeve (2) is symmetrically provided. The pre-embedded sleeve (2) is provided with a stepped limiting step (4) inside. The rigid handle (3) is provided with mushroom-shaped buckle rings (5) at the lower ends of both sides. The mushroom-shaped buckle rings (5) are engaged with the stepped limiting step (4) to make the rigid handle (3) and the pre-embedded sleeve (2) plugged and fixed. The soft body (1) is integrally formed from a single PVC soft material. The rigid handle (3) is injection molded from any one of the following rigid plastics: ABS, PP, PE, PA, PC / ABS alloy, POM or PF bakelite.

2. The soft, rotatable kettlebell according to claim 1, characterized in that: The outer surface of the soft kettle body (1) has no raised steps formed by the combination of hard and soft materials, and the soft material covering area of ​​the soft kettle body (1) accounts for 75%-90% of the overall outer surface area of ​​the kettle bell.

3. The soft, rotomolded kettlebell according to claim 1, characterized in that: A support plate (6) is provided between the rigid handle (3) located on the upper side of the mushroom-shaped inverted ring (5). The lower side of the support plate (6) is attached to the upper side of the soft pot body (1) to enhance the support force and anti-shaking stability between the two inserts on both sides of the rigid handle (3).

4. The soft, rotatable kettlebell according to claim 1, characterized in that: The rigid handle (3) is provided with an inverted platform (14) at its lowest end. The lower section of the rigid handle (3) extends to the bottom of the pre-embedded sleeve (2), so that the inverted platform (14) is fastened and locked to the bottom of the pre-embedded sleeve (2).

5. The soft, rotomolded kettlebell according to claim 1, characterized in that: The soft kettle body (1) is provided with a counterweight cavity (7) inside, and the counterweight cavity (7) is filled with counterweight sand. The soft kettle body (1) is provided with an air nozzle structure on the kettle wall. The air nozzle structure is also installed with the soft kettle body (1) through a pre-embedded sleeve (2). Its installation structure is the same as that of the rigid handle (3). It is matched with the step limit step (4) by a mushroom-shaped buckle (5) and is used to inflate the counterweight cavity (7) with air and fill it with counterweight sand.

6. A soft, rotatable kettlebell according to claim 5, characterized in that: The nozzle structure includes a nozzle body (8), a mushroom-shaped buckle (5), an integrated flexible connecting strip (9), a sealing plug (10), an elastic locking buckle (11), and a soft elastic sheet (12). The nozzle body (8) is provided with a mushroom-shaped buckle (5), which is inserted into the pre-embedded sleeve (2) and snapped in place. The upper side of the nozzle body (8) is provided with a sealing plug (10) through the integrated flexible connecting strip (9). The lower side of the nozzle body (8) is provided with an elastic locking buckle (11), and the elastic locking buckle (11) is provided with a soft elastic sheet (12). The soft elastic sheet (12) is unidirectionally fitted with the lower opening of the nozzle body (8).

7. The soft, rotomolded kettlebell according to claim 1, characterized in that: The bottom surface of the soft kettle body (1) is provided with anti-slip texture (13), which is any one or more of the following: ring pattern, radial pattern or grid pattern, and is integrally formed with the soft kettle body (1) by slush molding.

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