Inflatable flexible dumbbell

Abstract

The utility model discloses an inflatable flexible dumbbell which comprises a first balance weight part, a second balance weight part and a hard holding part. The first counterweight part comprises a first elastic bag body with a first air cavity; the second counterweight part comprises a second elastic bag body with a second air cavity; the holding part comprises a hard tubular body which is provided with a third air cavity and is made of plastic; the hard tubular body, the first elastic bag body and the second elastic bag body are all made of plastic materials, and fillers are arranged in the first air cavity, the second air cavity and the third air cavity; the elastic bag body and the gas contained in the elastic bag body avoid the risk that the dumbbell accidentally falls off to hurt people in the using process, the filler is arranged in the gas cavity of the holding part, and on the premise that the weight is equal, the size of the dumbbell is smaller.

Description

TECHNICAL FIELD

[0001] The utility model relates to a dumbbell technical field especially, it is a kind of inflatable flexible dumbbell to avoid to pound the human body, indoor ceramic tile, floor etc., still have good mute effect. BACKGROUND

[0002] Dumbbell as a kind of body-building equipment for enhancing muscle strength and endurance, can be divided into fixed weight dumbbell and weight adjustable dumbbell two categories.The weight of fixed weight dumbbell cannot be changed, generally by a metal rod and one or two weight disc constitute.And weight adjustable dumbbell can let user adjust weight according to own demand, common way is to add or remove weight disc.Dumbbell is usually made of cast iron, rubber or other durable materials, to guarantee its weight characteristics and durability.

[0003] In early days, people often go to professional gym to carry out body-building.However, with the increasing popularity of body-building activities, many people begin to choose to carry out body-building exercise in their own living room, balcony.But living room or balcony is mostly paved with ceramic tile or floor, in the process of using dumbbell, it is easy to appear that dumbbell pounds ceramic tile, floor, human body etc.on ground.And in high-rise building environment, the sound produced by the impact of dumbbell and ground can also interfere with the lower tenants.

[0004] The following prior art is searched, CN218740036U's training with filling body, disclose a dumbbell, including a body, two septa and filling, body is separated by left and right two pieces of septum into two ends filling and the closed space department of middle that do not communicate with each other, closed space department and its two ends filling part are separated by a septum, closed space department is the handlebar of dumbbell, and the filling part that is equipped with at least including filling particle is the two ends and weight block of dumbbell.

[0005] From the document, the two ends filling of the dumbbell are counterweight, usually sandstone, steel ball etc.;And handlebar or filling part is plastic.The dumbbell has the following problems: two ends filling is not connected, needs to inject filling particle into two ends filling respectively in process;At the same time, there is the situation that two ends filling weight is not consistent, influence dumbbell use experience. UTILITY MODEL CONTENT

[0006] In view of this, the technical problem to be solved by the utility model is to provide an inflatable flexible dumbbell.

[0007] The technical scheme adopted by the utility model to solve the above technical problem is as follows: an inflatable flexible dumbbell, comprising a first counterweight part, a second counterweight part and a handle part.

[0008] The first counterweight part comprises a first elastic bag body with a first air cavity and a filler in the first air cavity; the second counterweight part comprises a second elastic bag body with a second air cavity and a filler in the second air cavity; and the grip part comprises a hard tubular body with a third air cavity and a filler in the third air cavity.

[0009] The hard tubular body, the first elastic bag body and the second elastic bag body are made of plastic material; the first end of the hard tubular body is adjacent to the inner end of the first elastic bag body, and the first air cavity and the third air cavity are separated by a first separation bonding film with a first through hole.

[0010] The second end of the hard tubular body is adjacent to the inner end of the second elastic bag body, and the second air cavity and the third air cavity are separated by a second separation bonding film with a second through hole.

[0011] The three cavities of the first air cavity, the second air cavity and the third air cavity are communicated through the first through hole and the second through hole; and the first through hole and the second through hole have a hole diameter through which the filler can pass.

[0012] The preferred technical solution adopted by the utility model to solve the above technical problems is that the hard tubular body comprises a middle straight tubular small-diameter section and first and second diameter expansion sections on both sides.

[0013] The first diameter expansion section wraps the inner edge of the first elastic bag body, and the first diameter expansion section and the first elastic bag body are combined by a first separation bonding film.

[0014] The second diameter expansion section wraps the inner edge of the second elastic bag body, and the second diameter expansion section and the second elastic bag body are combined by a second separation bonding film.

[0015] The preferred technical solution adopted by the utility model to solve the above technical problems is that the hard tubular body, the first elastic bag body and the second elastic bag body are a roto-molding integral part.

[0016] A base film is arranged between the hard tubular body and the elastic bag body, and the part of the hard tubular body adjacent to the base film and the part of the elastic bag body adjacent to the base film are both fusion bonded to the base film, thereby forming a separation bonding film.

[0017] The preferred technical solution adopted by the utility model to solve the above technical problems is that the hard tubular body, the first elastic bag body, the second elastic bag body, the first separation bonding film and the second separation bonding film are all made of PVC material; and the filler is at least one of sand, iron sand and steel ball.

[0018] The preferred technical solution adopted by the utility model to solve the above technical problems is that the first diameter expansion section is a first horn section; and the second diameter expansion section is a second horn section.

[0019] The first elastic capsule is a first spherical body, and the second elastic capsule is a second spherical body.

[0020] The outer circumferential surface of the first horn section and the outer circumferential surface of the first spherical body are smoothly connected, and the outer circumferential surface of the second horn section and the outer circumferential surface of the second spherical body are smoothly connected.

[0021] The depth of the first horn section or the second horn section is H, and the radius of the first spherical body or the second spherical body is R; the depth H and the radius R satisfy 0.2R<H<0.8R.

[0022] The preferred technical solution for solving the above technical problem is that at least one of the first elastic capsule and the second elastic capsule is provided with an inflation valve core.

[0023] The preferred technical solution for solving the above technical problem is that the utility model discloses an inflatable flexible dumbbell, which comprises a first counterweight part, a second counterweight part and a handle part.

[0024] The first counterweight part comprises a first elastic capsule with a first air cavity; the second counterweight part comprises a second elastic capsule with a second air cavity; and the handle part comprises a hard tubular body with a third air cavity.

[0025] The hard tubular body comprises a middle straight tubular small-diameter section, a first horn section and a second horn section; the first elastic capsule is a first spherical body, and the second elastic capsule is a second spherical body; the first horn section is connected with the first spherical body, and the second horn section is connected with the second spherical body.

[0026] The hard tubular body, the first elastic capsule and the second elastic capsule are all made of plastic material; the material of the connection part of the first horn section and the first spherical body and the connection part of the second horn section and the second spherical body is fused with each other.

[0027] The first air cavity and the third air cavity are connected, and the second air cavity and the third air cavity are connected; one of the first elastic capsule and the second elastic capsule is provided with an inflation valve core.

[0028] The first air cavity, the second air cavity and the third air cavity are provided with a filler and gas; the filler has the ability to flow in the three cavities.

[0029] The preferred technical solution for solving the above technical problem is that the first horn section and the first spherical body are connected through a first separation and connection film; and the first separation and connection film is provided with a first through hole.

[0030] The second horn section is combined with a second spherical body through a second separation combination film, and the second separation combination film is provided with a second through hole.

[0031] The preferred technical solution for solving the above technical problems is that the hard tubular body, the first elastic bag body, the second elastic bag body, the first separation combination film and the second separation combination film are all made of PVC material.

[0032] The preferred technical solution for solving the above technical problems is that the depth of the first horn section or the second horn section is H, and the radius of the first spherical body or the second spherical body is R; the depth H and the radius R satisfy 0.2R < H < 0.8R.

[0033] The technical solution for solving the above technical problems is that a kind of inflatable flexible dumbbell, including first counterweight, second counterweight and hard grip portion;

[0034] The first counterweight includes the first elastic bag body with first air cavity;The second counterweight includes the second elastic bag body with second air cavity;

[0035] The grip portion, the first elastic bag body and the second elastic bag body are all made of plastic material, and the first air cavity and the second air cavity are provided with filler.

[0036] The preferred technical solution for solving the above technical problems is that the grip portion includes the hard tubular body with third air cavity of plastic texture;The first end of the hard tubular body is adjacent to the inner end of the first elastic bag body, and the first air cavity and the third air cavity are separated by the first separation combination film;

[0037] The second end of the hard tubular body is adjacent to the inner end of the second elastic bag body;And the second air cavity and the third air cavity are separated by the second separation combination film.

[0038] The preferred technical solution for solving the above technical problems is that the first separation combination film has a first through hole;The second separation combination film has a second through hole;

[0039] The first air cavity, the second air cavity and the third air cavity are communicated through the first through hole and the second through hole.

[0040] The preferred technical solution for solving the above technical problems is that the hard tubular body, the first elastic bag body and the second elastic bag body are roving plastic integrated parts;

[0041] The filler is at least one of sand, iron sand and steel ball.

[0042] The utility model discloses a preferred technical scheme that solves the above technical problems: the hard tubular body includes the small diameter section of the straight tubular body in the middle, the first horn section and the second horn section; the first elastic bag body is the first spherical body, and the second elastic bag body is the second spherical body.

[0043] The utility model discloses a preferred technical scheme that solves the above technical problems: the hard tubular body, the first elastic bag body, the second elastic bag body, the first separation combination membrane and the second separation combination membrane are all PVC materials.

[0044] Compared with the prior art, the utility model has the advantages that: the elastic bag body and the gas contained therein enable the two weight parts of the dumbbell to have excellent elasticity while maintaining sufficient weight. This design not only avoids the risk of the dumbbell accidentally falling and injuring people during use, but also effectively prevents the dumbbell from scratching the surface of hard objects such as floors, thereby improving the safety of use and environmental protection

[0045] Further, the gas cavity of the weight part and the gas cavity of the grip part are filled with fillers, and the weights of the two weight parts are more uniform. Due to the filler in the gas cavity of the grip part, the dumbbell has a smaller volume and lower packaging and transportation costs under the premise of equivalent weight.

[0046] In addition, the three cavities are connected, the filler can be filled from only one opening or double-head filling, which improves the convenience and efficiency of production and reduces the manufacturing cost. Moreover, as few openings as possible also maximizes the integrity and airtightness of the outer peripheral wall, ensuring its stability and durability in long-term use. BRIEF DESCRIPTION OF DRAWINGS

[0047] The utility model will be further described in detail below in combination with the drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments and therefore should not be regarded as limiting the scope of the utility model. In addition, unless specifically indicated, the drawings only schematically show the composition or structure of the described objects and can include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0048] Figure 1 It is the perspective view of inflatable flexible dumbbell;

[0049] Figure 2 It is the front view of inflatable flexible dumbbell;

[0050] Figure 3 It is the sectional view of inflatable flexible dumbbell;

[0051] Figure 4 It is the sectional view of plastic piece of inflatable flexible dumbbell. DETAILED DESCRIPTION

[0052] The preferred embodiments of the present application will be described in detail below with reference to the drawings. Those skilled in the art will appreciate that the description is merely descriptive, exemplary, and should not be interpreted as limiting the scope of protection of the present application.

[0053] It should be noted that similar reference numerals refer to similar items throughout the accompanying drawings, and once an item is defined in one drawing, it will not be further defined and explained in subsequent drawings.

[0054] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed during use, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as limiting the present application. The terms "first" and "second" are merely for the convenience of understanding and have no other directional meaning, and should not be understood as limiting the present application.

[0055] As shown in Figure 1 , the present embodiment provides an inflatable flexible dumbbell, which includes a middle hard grip 1 and first and second weight portions 2 and 3 on both sides.

[0056] As shown in Figures 1-4 , the first weight portion 2 includes a first elastic bag 20 having a first air cavity Q1 and a filler in the first air cavity Q1. The second weight portion 3 includes a second elastic bag 30 having a second air cavity Q2 and a filler in the second air cavity Q2.

[0057] Further, as shown in Figures 1-4 , the grip 1 includes a hard tubular body 10 having a third air cavity Q3 and a filler in the third air cavity Q3. The hard tubular body 10, the first elastic bag 20 and the second elastic bag 30 are made of plastic.

[0058] The first end of the hard tubular body 10 borders the inner end of the first elastic bag 20, and the second end of the hard tubular body 10 borders the inner end of the second elastic bag 30. The three cavities of the first air cavity Q1, the second air cavity Q2 and the third air cavity Q3 are in communication, and the fillers can flow in the three cavities.

[0059] Although the peripheral wall of the cavity is made of lightweight plastic material, the weight of pure plastic is difficult to achieve the weight effect required by the traditional dumbbell. Therefore, the embodiment combines the soft and hard materials perfectly by the plastic shell and the filler with high internal density, which ensures the reasonable weight of the dumbbell, so that the user can feel moderate resistance during exercise, effectively improving the training effect. Preferably, the filler is at least one of sand, iron sand and steel balls.

[0060] In the embodiment, the three air cavities are in communication with each other, which means that only one opening can be provided on the surface of the dumbbell, and the filler can be filled only through the opening. This design not only maximizes the integrity and air tightness of the peripheral wall, but also further enhances the structural strength of the dumbbell, ensuring its stability and durability during long-term use. At the same time, this integrated filling method greatly improves the convenience and efficiency of production, reduces the manufacturing cost, and enables more users to enjoy the fitness fun brought by this innovative product at a more affordable price.

[0061] The grip 1 also adopts the design of filling the plastic shell with air cavities, which can avoid the problem of bending deformation of the grip 1 caused by the light middle and heavy ends, so as to prolong the service life of the dumbbell.

[0062] More importantly, the elastic bag body and the gas contained in the air cavity enable the two weight parts of the dumbbell to have excellent elasticity while maintaining sufficient weight. This design not only avoids the risk of injuring people caused by accidental dropping of the dumbbell during use, but also effectively prevents the dumbbell from scratching the hard surface such as the floor, thereby improving the safety of use and protecting the environment.

[0063] Further, as shown in Figures 3-4 The first partitioning and combining film 4 with the first through hole K1 is arranged between the hard tubular body 10 and the first elastic bag body 20, and the first partitioning and combining film 4 separates the first air cavity Q1 from the third air cavity Q3. The second partitioning and combining film 5 with the second through hole K2 is arranged between the hard tubular body 10 and the second elastic bag body 30, and the second partitioning and combining film 5 separates the second air cavity Q2 from the third air cavity Q3. The first through hole K1 and the second through hole K2 have a hole diameter through which the filler can pass.

[0064] In the embodiment, the hard tubular body 10, the first elastic bag body 20 and the second elastic bag body 30 are roll-molded integral parts. The base film is arranged between the hard tubular body 10 and the elastic bag body, and the part of the hard tubular body 10 abutting the base film and the part of the elastic bag body abutting the base film are fused to form the partitioning and combining film.

[0065] The method for manufacturing the inflatable flexible dumbbell provided by the embodiment includes the following steps:

[0066] Step S1: add first plastic raw material into the first mold cavity of the rotational molding mold and seal the interface between the first mold cavity and the second mold cavity with the first base film; add second plastic raw material into the second mold cavity of the rotational molding mold and seal the interface between the second mold cavity and the third mold cavity with the second base film; add first plastic raw material into the third mold cavity of the rotational molding mold.

[0067] Step S2: open the rotational molding equipment, continuously rotate and heat the mold cavities of the rotational molding mold, and the plastic raw materials in the mold cavities are gradually and uniformly coated and fused to the inner walls of the mold cavities and the surfaces of the base films under the action of gravity and heat energy; the first plastic raw material in the first mold cavity is fused into the first base film, the second plastic raw material in the second mold cavity is fused into the first base film and the second base film; and the first plastic raw material in the third mold cavity is fused into the second base film.

[0068] Step S3: cool and shape to form a shaped body with a first elastic sac 20, a hard tubular body 10, and a second elastic sac 30; the two sides of the first base film are fused with the first plastic raw material and the second plastic raw material respectively to form a first separation and combination film 4, and the first elastic sac 20 and the hard tubular body 10 are integrally connected with the first separation and combination film 4; the two sides of the second base film are fused with the first plastic raw material and the second plastic raw material respectively to form a second separation and combination film 5, and the second elastic sac 30 and the hard tubular body 10 are integrally connected with the second separation and combination film 5.

[0069] Step S4: open the mold and take out the shaped body with the hard tubular body 10, the first elastic sac 20, and the second elastic sac 30 from the mold.

[0070] Step S5: place the shaped body on a tooling, use a puncturing device to form an injection hole on the first elastic sac 20 or the second elastic sac 30, and inflate the shaped body to a specified size in the tooling to form air cavities in the hard tubular body 10, the first elastic sac 20, and the second elastic sac 30 respectively.

[0071] Step S6: use the puncturing device to continuously pass through the inner cavities of the hard tubular body 10, the first elastic sac 20, and the second elastic sac 30 through the injection hole to perforate the first separation and combination film 4 and the second separation and combination film 5 to form a first through hole K1 and a second through hole K2.

[0072] Step S7: fill the filler into the three cavities of the first air cavity Q1, the second air cavity Q2, and the third air cavity Q3 through the injection hole, then plug in the inflation valve core G at the injection hole to close the injection hole, and the first air cavity Q1, the second air cavity Q2, and the third air cavity Q3 have air gaps to allow the fillers in the three cavities to flow relative to each other.

[0073] In the embodiment, the puncture devices form injection holes on the first elastic bag 20 and the second elastic bag 30 in a straight line, so as to realize double-end filling and improve production efficiency. Further, the inflation valve core G is formed at the two ends of the dumbbell.

[0074] Preferably, the hard tubular body 10, the first elastic bag 20, the second elastic bag 30, the first separation bonding film 4 and the second separation bonding film 5 are all made of PVC material. The first plastic raw material and the second plastic raw material are both paste-like resin. The first plastic raw material is low-density PVC, and the second plastic raw material is high-density PVC.

[0075] All the components are made of PVC material, which means that in the process of rotational molding, the components can reach the ideal melting state under almost the same temperature condition, so as to ensure excellent fusion effect between the parts.

[0076] In terms of structure, since all the components are made of the same material, their thermal expansion coefficients and thermal shrinkage rates are similar, so that after cooling and solidification, a product with high integrity and stable structure can be formed. In particular, the first separation bonding film 4 and the second separation bonding film 5, as the key parts connecting the hard tubular body 10 and the elastic bags, melt the materials of the components on both sides onto the same base film, so that the three are integrated to achieve perfect fusion, effectively avoiding the forming defects caused by material differences, ensuring good fusion, and further improving the strength of the junction between the hard tubular body 10 and the elastic bags. Therefore, during long-term use, these junctions are less likely to have forming defects such as cracking and falling off, thereby greatly prolonging the service life of the product.

[0077] In terms of structure, as shown in Figures 1-4 the hard tubular body 10 includes a middle straight tubular small-diameter section 11 and first and second flared sections 12 and 13 on both sides. The first flared section 12 wraps the inner edge of the first elastic bag 20, and the first flared section 12 and the first elastic bag 20 are combined by the first separation bonding film 4. The second flared section 13 wraps the inner edge of the second elastic bag 30, and the second flared section 13 and the second elastic bag 30 are combined by the second separation bonding film 5. The first and second flared sections 12 and 13 support the elastic bags and improve the connection strength of the two.

[0078] Further, the first flared section 12 is a first horn section. The second flared section 13 is a second horn section. The first elastic bag 20 is a first spherical body, and the second elastic bag 30 is a second spherical body. The outer peripheral surface of the first horn section and the outer peripheral surface of the first spherical body, and the outer peripheral surface of the second horn section and the outer peripheral surface of the second spherical body, smoothly transition.

[0079] The first and second diameter expanding sections 12 and 13 are ingeniously designed as horn sections, which gradually expand in shape and are in close connection with the spherical elastic capsule, not only realizing smooth transition of the pipe diameter, but also realizing seamless and smooth transition of the outer circumferential surfaces of different components. This design optimizes stress distribution from the functional aspect, reduces potential stress concentration points caused by shape mutation, and also brings structural beauty and neatness from the aesthetic aspect. The smooth and continuous curved lines give the entire device a streamlined and elegant appearance, improving the visual aesthetics. The smooth transition design makes the joints delicate in touch without obvious protrusions or depressions, avoiding scratches or wear on personnel or objects during use, and greatly facilitating daily cleaning and maintenance work due to the difficulty of accumulating dust, dirt or residues.

[0080] Further, in the design details of the first and second horn sections, the embodiment also preferably introduces key size parameters - depth H and radius R. The ingenious proportional relationship between these two parameters not only concerns the beauty and smoothness of the structure, but also directly reflects the use of strength and performance optimization.

[0081] Specifically, the depth of the first or second horn section is accurately set as H, and the radius of the first or second spherical body connected thereto is R. The ideal proportion range between the depth H and the radius R is 0.2R<H<0.8R. The setting of this proportion range aims to balance structural strength and aesthetics, ensuring optimal visual effect and user experience under the premise of meeting the use strength.

[0082] When the depth H is within this proportion range, the transition curve of the connection between the horn section and the spherical body can be neither too steep nor too gentle. Such a design not only effectively disperses stress and reduces stress concentration caused by shape mutation, thereby improving the fatigue strength and service life of the entire structure, but also ensures smooth flow of fluid in the pipe system, reducing energy consumption and noise.

[0083] A kind of inflatable flexible dumbbell provided by the utility model is introduced, specific examples are applied in this paper to describe the principle and implementation mode of the utility model, the above embodiment is only used to help understand the utility model and core idea. It should be pointed out that for ordinary skilled personnel in the technical field, without departing from the principle of the utility model, the utility model can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the utility model claims.

Claims

1. An inflatable flexible dumbbell, characterized in that: comprising a first weight part, a second weight part and a handle part; the first weight part comprises a first elastic bag body with a first air cavity and a filler in the first air cavity; the second weight part comprises a second elastic bag body with a second air cavity and a filler in the second air cavity, and the handle part comprises a hard tubular body with a third air cavity and a filler in the third air cavity; the hard tubular body, the first elastic bag body and the second elastic bag body are made of plastic material; the first end of the hard tubular body is adjacent to the inner end of the first elastic bag body, and the first air cavity and the third air cavity are separated by a first separation bonding film with a first through hole; the second end of the hard tubular body is adjacent to the inner end of the second elastic bag body; and the second air cavity and the third air cavity are separated by a second separation bonding film with a second through hole; the three cavities of the first air cavity, the second air cavity and the third air cavity are communicated through the first through hole and the second through hole; the first through hole and the second through hole have a hole diameter allowing the filler to pass through.

2. The inflatable flexible dumbbell according to claim 1, characterized in that: the hard tubular body, the first elastic bag body and the second elastic bag body are roll-molded integral parts; the hard tubular body comprises a middle straight tubular small-diameter section and two first and second expanded-diameter sections on both sides; the first expanded-diameter section wraps the inner edge of the first elastic bag body, and the first expanded-diameter section and the first elastic bag body are combined by a first separation bonding film; the second expanded-diameter section wraps the inner edge of the second elastic bag body, and the second expanded-diameter section and the second elastic bag body are combined by a second separation bonding film; a base film is arranged between the hard tubular body and the elastic bag body, and the part of the hard tubular body adjacent to the base film and the part of the elastic bag body adjacent to the base film are both fusion-bonded to the base film, thereby forming the separation bonding film.

3. The inflatable flexible dumbbell according to claim 1, characterized in that: the hard tubular body, the first elastic bag body, the second elastic bag body, the first separation bonding film and the second separation bonding film are all made of PVC material; and the filler is at least one of sand, iron sand and steel balls.

4. The inflatable flexible dumbbell according to claim 2, characterized in that: the first expanded-diameter section is a first horn section, and the second expanded-diameter section is a second horn section; the first elastic bag body is a first spherical body, and the second elastic bag body is a second spherical body; the outer peripheral surface of the first horn section smoothly transitions to the outer peripheral surface of the first spherical body, and the outer peripheral surface of the second horn section smoothly transitions to the outer peripheral surface of the second spherical body; the depth of the first horn section or the second horn section is H, and the radius of the first spherical body or the second spherical body is R; the depth H and the radius R satisfy the condition: 0.2R < H < 0.8R.

5. The inflatable flexible dumbbell according to claim 1, characterized in that: at least one of the first elastic bag body and the second elastic bag body is provided with an inflation valve core.

6. An inflatable flexible dumbbell, characterized in that: comprising a first weight part, a second weight part and a handle part; ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The first counterweight part comprises a first elastic bag with a first air cavity; the second counterweight part comprises a second elastic bag with a second air cavity; the grip part comprises a hard tubular body with a third air cavity; The hard tubular body comprises a middle straight tubular small-diameter section, a first horn section and a second horn section; the first elastic bag is a first spherical body, and the second elastic bag is a second spherical body; the first horn section is in abutment with the first spherical body, and the second horn section is in abutment with the second spherical body; The hard tubular body, the first elastic bag and the second elastic bag are all made of plastic material, and the materials of the first horn section and the first spherical body in abutment and the second horn section and the second spherical body in abutment are fused with each other; The first air cavity and the third air cavity are in communication, the second air cavity and the third air cavity are in communication, and at least one of the first elastic bag and the second elastic bag is provided with an inflation valve core; the first air cavity, the second air cavity and the third air cavity are provided with a filler and gas.

7. The inflatable flexible dumbbell according to claim 6, wherein: The first horn section and the first spherical body are combined by a first separation combination film, and the first separation combination film is provided with a first through hole; The second horn section and the second spherical body are combined by a second separation combination film, and the second separation combination film is provided with a second through hole.

8. The inflatable flexible dumbbell according to claim 6, wherein: The hard tubular body, the first elastic bag, the second elastic bag, the first separation combination film and the second separation combination film are all made of PVC material.

9. The inflatable flexible dumbbell according to claim 6, wherein: The depth of the first horn section or the second horn section is H, and the radius of the first spherical body or the second spherical body is R; the depth H and the radius R satisfy 0.2R<H<0.8R.

10. An inflatable flexible dumbbell, comprising: a first counterweight part, a second counterweight part and a hard grip part; The first counterweight part comprises a first elastic bag with a first air cavity; the second counterweight part comprises a second elastic bag with a second air cavity; The grip part, the first elastic bag and the second elastic bag are all made of plastic material, and the first air cavity and the second air cavity are provided with a filler.

11. The inflatable flexible dumbbell according to claim 10, wherein: The grip part comprises a hard tubular body with a third air cavity; The first end of the hard tubular body is in abutment with the inner end of the first elastic bag, and a first separation combination film separates the first air cavity and the third air cavity; The second end of the hard tubular body is in abutment with the inner end of the second elastic bag, and a second separation combination film separates the second air cavity and the third air cavity.

12. The inflatable flexible dumbbell according to claim 11, wherein: The first separation combination film has a first through hole, and the second separation combination film has a second through hole; The first air cavity, the second air cavity and the third air cavity are in communication through the first through hole and the second through hole.

13. The inflatable flexible dumbbell according to claim 11, wherein: The hard tubular body, the first elastic bag body and the second elastic bag body are roto-molding integral parts; The filler is at least one of sand, iron sand and steel ball.

14. The inflatable flexible dumbbell of claim 11, wherein: The hard tubular body comprises a middle straight tubular small-diameter section, a first horn section and a second horn section; the first elastic bag body is a first spherical body, and the second elastic bag body is a second spherical body.

15. The inflatable flexible dumbbell of claim 11, wherein: The hard tubular body, the first elastic bag body, the second elastic bag body, the first separation bonding film and the second separation bonding film are all PVC materials.

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