Dumbbell with composite structure

Abstract

The utility model relates to a dumbbell with a composite structure, belongs to the field of fitness equipment, aims to solve the problem that hardness and strength of an existing dumbbell cannot be considered at the same time, and provides the dumbbell with the composite structure which comprises an internal part and an external part which are compounded together, the hardness of the internal part is larger than that of the external part, and the external part is a soft plastic part. The outer part wraps the built-in part to form a handheld part, the outer part extends outwards along the two ends of the built-in part to form two hollow balance weight parts, feeding ports are formed in the balance weight parts, and the balance weight parts can be filled with materials through the feeding ports. The outer part can protect the built-in part, is rich in color and plays a role in local enhancement and thickening, the bonding strength of the outer part and the built-in part is high, the outer part and the built-in part are not easy to peel off, and the strength of the handheld part is obviously improved; the balance weight part can be filled with materials according to requirements, and different balance weight requirements are met; the counterweight part is soft, does not generate large impact on the floor, and has small damage effect on the floor.

Description

TECHNICAL FIELD

[0001] The utility model belongs to body -building equipment field, especially relate to a dumbbell with composite structure. BACKGROUND

[0002] Dumbbell is more common body -building equipment, two ends are the size larger counterweight part, the middle is the smaller diameter hand -held part, usually dumbbell is solid metal products or hard texture plastic, if use accidentally, this hard dumbbell under the action of gravity or external force is smashed to the ground, because its texture is hard, the deformation of the impact moment is small, the impact energy that absorbs is very limited, therefore the impact energy will produce the bigger damage effect to the floor, very easy to smash the floor, for this, adopt hollow soft plastic support dumbbell, and fill sand, water in the dumbbell interior scheme, but the strength of this soft plastic is not enough to support the weight after filling, easy to bend and break. SUMMARY

[0003] In view of the problem that the hardness and strength of the existing dumbbell cannot be considered, the utility model provides a dumbbell with composite structure, adopts built-in part and outer part to form hand -held part, ensures that the hand -held part has enough strength, and the soft counterweight part will not smash the floor when falling on the ground.

[0004] The utility model adopts the technical scheme as follows: a dumbbell with composite structure, including built-in part and outer part that are combined together, the hardness of the built-in part is greater than the outer part, the outer part is soft plastic part, the outer part covers the built-in part and forms hand -held part, the outer part extends outward along two ends of the built-in part and forms two hollow counterweight parts, the counterweight part is equipped with feed inlet, and the counterweight part can be filled with filler through the feed inlet.

[0005] The outer part can protect the built-in part, enrich color, play the role of local reinforcement and thickening, and also reduce the forming and manufacturing requirements of the built-in part, facilitate the manufacturing of personalized and differentiated workpieces; the outer part is wrapped and fixed with the built-in part by using the shrinkage force generated when the plastic material solidifies, the composite structure makes the combination strength high and difficult to peel off, and the built-in part and the outer part combined into one are double stressed, so that the strength of the hand -held part is obviously improved; the counterweight part can be filled with filler according to needs, so that different counterweight requirements are met; the counterweight part is soft, can produce large deformation when falling on the ground, the impact energy is absorbed through the deformation part, so that the floor is not impacted greatly and the damage to the floor is small.

[0006] Further, the inner part is a hollow pipe, the outer part covers the inner and outer surface of the inner part, the formed hand-held part is hollow, and the inside of the hand-held part is communicated with the inside of the two counterweight parts to form a containing cavity for containing filler. In this structure, the filler port is arranged on only one of the counterweight parts, so that the filler can be realized and the material can be saved. The filler is filled in the containing cavity to form sufficient counterweight.

[0007] Further, the inner part is a solid part, the outer part covers the outer surface of the inner part, the formed hand-held part is a solid part, and the filler port is provided with two, and one of the filler ports is arranged on each of the counterweight parts.

[0008] Further, the inner part is one of a metal part, a hard plastic part or a carbon fiber part. The inner part itself has sufficient strength and can provide sufficient support for the hand-held part, so that the hand-held part is not broken and fractured under pressure and further affects use.

[0009] Further, each counterweight part is provided with two oppositely arranged planes, one of which is a smooth plane. The planes are arranged to avoid the back and forth rolling of the counterweight parts, and the smooth plane is arranged because paint is easy to adhere to the smooth plane, facilitating the formation of a logo to distinguish the model and manufacturer of the product.

[0010] Further, the hand-held part is smoothly connected with the counterweight part, and the cross-sectional size of the hand-held part is smaller than that of the counterweight part. If there is a sharp corner, internal stress is easily formed at the connection, and the part is easily fractured at the weak position with large internal stress under stress.

[0011] Further, the hand-held part is provided with two positioning holes, and the two positioning holes are located on the same side of the hand-held part. The inner part is conveniently positioned during molding to prevent displacement of the inner part.

[0012] Further, the filler port comprises a hollow cylinder, and the outer part covers the outer surface of the cylinder. The outer part covers the cylinder to form reliable connection.

[0013] Further, the filler port is located on the end face of the counterweight part. If the hand is accidentally dropped on the ground during use, the filler port arranged on the end face of the counterweight part is not easy to be damaged under stress.

[0014] The utility model has the beneficial effect that the application is a dumbbell with inner and outer parts, the outer part can protect the inner part and enrich the color, and has the effect of local reinforcement and thickening. The combination strength of the outer part and the inner part is high, and the dumbbell is not easy to peel off, so that the strength of the hand-held part is obviously improved. The counterweight part can be filled with filler according to needs, so that different counterweight requirements can be met. The counterweight part is soft, so that the dumbbell will not produce large impact on the floor and has small damage to the floor. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A schematic diagram of the overall structure of the dumbbell with a composite structure;

[0016] Figure 2 A schematic diagram of the internal structure of the hand-held part of Example 1;

[0017] Figure 3 A schematic diagram of the internal structure of the hand-held part of Example 2;

[0018] In the figure: 1 - outer part; 2 - built-in part; 3 - hand-held part; 31 - positioning hole; 4 - weight part; 41 - feeding opening; 42 - flat surface. DETAILED DESCRIPTION

[0019] The technical solutions of the embodiments of the present application will be explained and described below in combination with the drawings of the present application. However, the following embodiments are only preferred embodiments of the present application, and are not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor are all within the protection scope of the present application.

[0020] Example 1

[0021] A dumbbell with a composite structure, as shown in Figure 1 and Figure 2 , comprises a built-in part 2 and an outer part 1 which are combined together, the built-in part 2 has a greater hardness than the outer part 1, the outer part 1 is a soft plastic part, the outer part 1 covers the built-in part 2 to form a hand-held part 3, the outer part 1 extends outward along both ends of the built-in part 2 to form two hollow weight parts 4, the weight parts 4 are provided with feeding openings 41, and the weight parts 4 can be filled with materials through the feeding openings 41.

[0022] The outer part 1 can protect the built-in part 2, enrich the color, play a role in local reinforcement and thickening, and also reduce the forming and manufacturing requirements of the built-in part 2, thereby facilitating the manufacturing of personalized and differentiated workpieces. The outer part 1 uses the shrinkage force generated when the plastic material solidifies to wrap and fixedly connect the built-in part 2. This composite structure makes the combination strength of the two parts high and not easy to peel off. Moreover, the built-in part 2 and the outer part 1 which are combined into one are subjected to double stresses, thereby obviously improving the strength of the hand-held part 3. The weight parts 4 can be filled with materials according to needs, thereby meeting different weight requirements. The weight parts 4 are soft, can produce large deformation when falling on the ground, and the impact energy generated thereby can be absorbed by the deformation part itself, thereby not producing large impact on the floor and having small damage to the floor.

[0023] The inner part 2 is a hollow pipe, the outer part 1 covers the inner and outer surface of the inner part 2, the formed hand-held part 3 is hollow, and the inside of the hand-held part 3 is in communication with the inside of the two counterweight parts 4, forming a containing cavity for containing filler. In this structure, only one of the counterweight parts 4 is provided with a feeding port 41, so that the filler can be filled in the containing cavity to form sufficient counterweight.

[0024] The inner part 2 is one of a metal part, a hard plastic part or a carbon fiber part. The inner part 2 itself has sufficient strength to provide sufficient support for the hand-held part 3, so as to prevent the hand-held part 3 from being damaged or broken under pressure and affecting use.

[0025] Each counterweight part 4 is provided with two oppositely arranged flat surfaces 42, one of which is a smooth surface. The flat surfaces 42 are arranged to avoid the counterweight part 4 from rolling back and forth, and the smooth surface is arranged because paint is easy to adhere to the smooth surface, facilitating the formation of a logo to distinguish the model and manufacturer of the product.

[0026] The hand-held part 3 is smoothly connected with the counterweight part 4, and the cross-sectional size of the hand-held part 3 is smaller than that of the counterweight part 4. If there is a sharp corner, internal stress is easily formed at the connection, and the part is easily broken at the weak position with large internal stress under stress. The smoothly connected hand-held part 3 and counterweight part 4 can effectively reduce internal stress and ensure structural stability.

[0027] The hand-held part 3 is provided with two positioning holes 31, and the two positioning holes 31 are located on the same side of the hand-held part 3. The inner part 2 is conveniently positioned during molding to prevent displacement of the inner part 2.

[0028] The feeding port 41 includes a hollow cylinder, and the outer part 1 covers the outer surface of the cylinder. The outer part 1 covers the cylinder to form reliable connection.

[0029] The feeding port 41 is located on the end face of the counterweight part 4. If the product is accidentally dropped to the ground during use, the feeding port 41 arranged on the end face of the counterweight part 4 is not easy to be damaged under stress.

[0030] Embodiment 2

[0031] As shown in Figure 3 The difference between this embodiment and embodiment 1 is that the inner part 2 is a solid part, the outer part 1 covers the outer surface of the inner part 2, the formed hand-held part 3 is a solid part, the feeding port 41 is provided with two, and one feeding port 41 is arranged on each counterweight part 4. The advantage of this arrangement is that the inner part 2 is wrapped in the outer part 1 and is not easy to come out of the outer part 1, and the hand-held part 3 has high strength.

[0032] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and those skilled in the art should understand that the present application includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification not deviating from the function and structural principle of the present application will be included in the scope of the claims.

Claims

1. A dumbbell having a composite structure, characterized by, The utility model provides a handheld filling device, including the built -in (2) and the outer (1) that are compounded together, the built -in (2) hardness is greater than the outer (1), the outer (1) is soft plastic part, the outer (1) cladding built -in (2) forms handheld (3), the outer (1) respectively along two ends of built -in (2) outward extends and forms two hollow counterweight (4), be equipped with feeding port (41) on counterweight (4), can fill material to the inside of counterweight (4) through feeding port (41), and the outer (1) utilizes the shrinkage force of the solidification of plastic material and wraps built -in (2) and is fixed.

2. The dumbbell with a composite structure according to claim 1, characterized in that, The built -in (2) is hollow pipe, the outer (1) cladding the inner and outer surface of built -in (2), forms the handheld (3) is hollow, further the inside of handheld (3) is communicated with the inside of two counterweight (4), forms the containing cavity for accommodating fill material.

3. The dumbbell with a composite structure according to claim 1, characterized in that, The built -in (2) is solid, the outer (1) cladding the outer surface of built -in (2), forms the handheld (3) is solid, the feeding port (41) is equipped with two, and one feeding port (41) is arranged on each counterweight (4).

4. The dumbbell with a composite structure according to claim 2 or 3, characterized in that, The built -in (2) is one of metal, hard plastic or carbon fiber.

5. The dumbbell with a composite structure according to claim 2 or 3, characterized in that, Each counterweight (4) is equipped with two opposite flat surfaces (42), one of which is a smooth surface.

6. The dumbbell with a composite structure according to claim 2 or 3, characterized in that, The handheld (3) is smoothly connected with the counterweight (4), and the cross-sectional size of the handheld (3) is smaller than that of the counterweight (4).

7. The dumbbell with a composite structure according to claim 2 or 3, characterized in that, The handheld (3) is provided with two positioning holes (31), and the two positioning holes (31) are located on the same side of the handheld (3).

8. The dumbbell with a composite structure according to claim 2 or 3, characterized in that, The feeding port (41) includes a hollow cylinder, and the outer (1) cladding the outer surface of the cylinder.

9. The dumbbell with a composite structure according to claim 8, characterized in that, The feeding port (41) is located on the end face of the counterweight (4).

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