Adjustable dumbbell

Abstract

The utility model provides an adjustable dumbbell. The adjustable dumbbell comprises dumbbell piece assemblies, a fixing shaft and a dumbbell body. Wherein the dumbbell piece assemblies are arranged at the two ends of the dumbbell body, radial grooves are formed in the dumbbell piece assemblies, the fixing shaft penetrates through the radial grooves of the dumbbell piece assemblies to be connected with the dumbbell body, and the top ends of the radial grooves of the dumbbell piece assemblies are attached to the fixing shaft. Through mutual cooperation of the dumbbell body and the fixing shaft, the dumbbell piece assemblies can be stably placed on the fixing shaft, a user can conveniently increase the weight of the dumbbell based on the training requirement of the user, the cost needed by the user is reduced, and the flexibility of the dumbbell and the use experience of the user are improved. Meanwhile, the dumbbell body is matched with the fixing shaft, the dumbbell piece assemblies in the middle are clamped from the two sides, and the overall stability and reliability of the product are improved.

Description

Technical Field

[0001] The utility model relates to the field of dumbbells, in particular to an adjustable dumbbell. Background Art

[0002] Currently, in the existing technology, the design of dumbbells often has certain limitations, that is, they are not easy to disassemble and reassemble. This fixed design makes it difficult for users to flexibly adjust the weight of the dumbbells according to their personal exercise needs or changes in training intensity. Summary of the Invention

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] To this end, a first aspect of the present invention provides an adjustable dumbbell.

[0005] In view of this, the first aspect of the present invention provides an adjustable dumbbell, comprising: a dumbbell body; a dumbbell plate assembly, the dumbbell plate assembly being arranged at both ends of the dumbbell body, and the dumbbell plate assembly being provided with a radial groove; a fixed shaft, the fixed shaft passing through the radial groove and connected to the dumbbell body, and the top of the radial groove being in contact with the fixed shaft.

[0006] The utility model proposes an adjustable dumbbell, comprising a dumbbell plate assembly, a fixed shaft and a dumbbell body. The dumbbell plate assembly is arranged at both ends of the dumbbell body, and the dumbbell plate assembly is provided with a radial groove. The fixed shaft passes through the radial groove and is connected to the dumbbell body, and the top of the radial groove is in contact with the fixed shaft. Through the mutual cooperation between the dumbbell body and the fixed shaft, the dumbbell plate assembly can be stably placed on the fixed shaft, so that the user can increase the weight of the dumbbell based on his or her training needs, reducing the cost required by the user and improving the flexibility of the dumbbell and the user's experience. At the same time, through the cooperation between the dumbbell body and the fixed shaft, the dumbbell plate assembly in the middle is clamped from both sides, thereby improving the overall stability and reliability of the product.

[0007] In addition, the adjustable dumbbell in the above technical solution provided by the present invention may also have the following additional technical features:

[0008] In some technical solutions of the present invention, the dumbbell body can optionally include: a fixed handle shaft; two basic dumbbell plates, which are fixedly connected to both ends of the fixed handle shaft respectively; wherein the basic dumbbell plates are provided with circular openings, which are adapted to the two ends of the fixed handle shaft.

[0009] In this technical solution, the dumbbell body includes a fixed handlebar shaft and basic dumbbell plates. The basic dumbbell plates are provided with two circular openings, which fit into the ends of the fixed handlebar shaft. The fixed handlebar shaft is fixedly connected to the circular openings, i.e., the ends of the fixed handlebar shaft are connected to the basic dumbbell plates through the circular openings. By fixedly connecting the fixed handlebar shaft to the basic dumbbell plates, the structural stability and connection strength between the fixed handlebar shaft and the basic dumbbell plates are increased, preventing accidents caused by loosening or falling off during exercise, reducing production costs and complexity, and improving the overall stability and safety of the dumbbell.

[0010] In some technical solutions of the present invention, the dumbbell plate assembly optionally includes: a first dumbbell plate, a first connecting buckle is provided on one side of the first dumbbell plate; at least one second dumbbell plate, a first connecting buckle is provided on one side of the second dumbbell plate, and a first groove is provided on the other side of the second dumbbell plate; wherein, a first groove is provided on a side of the basic dumbbell plate away from the fixed handle shaft, the first connecting buckle is adapted to the first groove, and the first dumbbell plate, the second dumbbell plate and the basic dumbbell plate are all connected to the first groove through the first connecting buckle.

[0011] In this technical solution, the dumbbell plate assembly includes a first dumbbell plate and at least one second dumbbell plate. A first connecting buckle is provided on one side of the first dumbbell plate and one side of the second dumbbell plate, and a first groove is provided on the other side of the second dumbbell plate. A first groove is provided on the side of the basic dumbbell plate facing away from the fixed handlebar, and the first connecting buckle is adapted to fit into the first groove. The first connecting buckle cooperates with the first groove to connect any two of the first, second, and basic dumbbell plates, ensuring a secure connection between the first, second, and basic dumbbell plates, avoiding accidents caused by loose connections or detachment during exercise, thereby improving product safety.

[0012] In some technical solutions of the present invention, optionally, the first dumbbell plate and the second dumbbell plate are both provided with a strip opening; wherein, both ends of the strip opening are semicircular, and the strip opening is located above the radial groove.

[0013] In this technical solution, both the first and second dumbbell plates are provided with a strip-shaped opening, wherein the ends of the strip-shaped opening are semicircular and located above the radial slot. By providing the strip-shaped opening with semicircular ends, users can more easily pass their fingers or palms through the openings, thereby easily picking up the dumbbell plates. This reduces the risk of slipping caused by directly grabbing smooth or heavy dumbbell plates, and improves convenience and safety during use. Furthermore, locating the strip-shaped opening above the radial slot makes it easier for users to place the dumbbell plate assembly on the fixed shaft when adding weight to the dumbbell, thus improving the user experience.

[0014] In some technical solutions of the present invention, optionally, a side of the first dumbbell plate provided with the first connecting buckle and a side of the second dumbbell plate provided with the first connecting buckle are both provided with a second groove; wherein, the first connecting buckle is partially located in the second groove, the first connecting buckle is provided with a first through hole, the second groove is provided with a second through hole, and the first connecting buckle and the second groove are connected by a first connecting member.

[0015] In this technical solution, a second groove is provided on one side of the first dumbbell piece and one side of the second dumbbell piece, wherein a portion of the first connecting buckle is located within the second groove. Furthermore, the first connecting buckle has a first through-hole, and the second groove has a second through-hole. The first connecting buckle and the second groove are connected by a first connecting member. The connection between the first connecting buckle and the second groove via the first connecting member enhances the stability of the connection, making it difficult for the dumbbells to separate, improving the user experience and product safety.

[0016] In some technical solutions of the present invention, optionally, the depth of the first groove is greater than the depth of the second groove.

[0017] In this technical solution, the depth of the first groove is greater than the depth of the second groove. Because in the above solution, the first connecting buckle and the second groove are connected by the first connecting member, the second groove only needs to serve a positioning function. On this basis, placing the first connecting buckle outside the second groove more fully engages with the first groove, which can further facilitate the connection between the first connecting buckle and the second groove via the first connecting member. By setting the depth of the first groove greater than the depth of the second groove, the stability and reliability of the overall structure are improved, and the assembly quality and user experience are enhanced.

[0018] In some technical solutions of the present invention, the first dumbbell plate is optionally provided with a plurality of notches, and the plurality of notches are designed to be symmetrical with the radial groove as the axis; wherein the weight of the first dumbbell plate is less than the weight of the second dumbbell plate.

[0019] In this technical solution, the first dumbbell plate is provided with multiple notches, designed symmetrically about the radial groove. The weight of the first dumbbell plate is less than that of the second dumbbell plate. This design allows the weight of the first dumbbell plate to be adjusted without changing its thickness. Furthermore, the first dumbbell plate is not reduced in thickness to reduce weight, which would result in excessive thinness and potential damage during processing. By providing multiple notches in the first dumbbell plate, designed symmetrically about the radial groove, the structural integrity and strength of the dumbbell plate are maintained, enhancing the user experience.

[0020] In some technical solutions of the present invention, the fixed shaft optionally includes: a head; a threaded rod fixedly connected to the head. The head includes: a first circular plane; a second circular plane, the radius of the second circular plane being smaller than the radius of the first circular plane, the second circular plane being disposed on the first circular plane, and the threaded rod being disposed on the second circular plane.

[0021] In this technical solution, the fixed shaft includes a head and a threaded rod, which is fixedly connected to the head. The head includes a first circular surface and a second circular surface, the second circular surface having a smaller radius than the first circular surface. The second circular surface is positioned above the first circular surface, and the threaded rod is positioned above the second circular surface. The design of the first and second circular surfaces facilitates the user's application of force when tightening the fixed shaft, improving grip stability, optimizing force transmission, and enhancing connection reliability.

[0022] In some technical solutions of the present invention, the interior of the fixed handle shaft can optionally be a hollow structure, and the fixed shaft can be a semi-threaded structure.

[0023] In this technical solution, the interior of the fixed handlebar shaft is a hollow structure, and the fixed shaft is a semi-threaded structure. By setting the fixed shaft to a semi-threaded structure, the bolt is more flexible and convenient when installing and removing.

[0024] In some technical solutions of the present invention, the interior of the fixed handle shaft can optionally be a hollow structure, and the fixed shaft can be a fully threaded structure.

[0025] In this technical solution, the interior of the fixed handlebar shaft is a hollow structure, and the fixed shaft is a fully threaded structure. By setting the fixed shaft to a fully threaded structure, it can provide higher connection strength, ensuring the stability and reliability of the connection.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 One of the schematic diagrams of an adjustable dumbbell according to an embodiment of the present invention is shown;

[0029] Figure 2 One of the schematic diagrams of a dumbbell body according to one embodiment of the present utility model is shown;

[0030] Figure 3 One of the schematic diagrams of a first dumbbell plate according to an embodiment of the present utility model is shown;

[0031] Figure 4 One of the schematic diagrams of a first dumbbell plate according to an embodiment of the present utility model is shown;

[0032] Figure 5 One of the schematic diagrams of a second dumbbell plate according to an embodiment of the present utility model is shown;

[0033] Figure 6 One of the schematic diagrams of a second dumbbell plate according to an embodiment of the present utility model is shown;

[0034] Figure 7 One of the schematic diagrams of a fixed shaft according to an embodiment of the present utility model is shown;

[0035] Figure 8 One of the schematic diagrams of a fixed shaft according to an embodiment of the present utility model is shown;

[0036] in, Figures 1 to 8 The corresponding relationship between the reference numerals and component names is as follows:

[0037] 10. Dumbbell body; 12. Dumbbell plate assembly; 14. Fixed shaft; 102. Fixed handle shaft; 104. Basic dumbbell plate; 122. First dumbbell plate; 124. First connecting buckle; 126. Second dumbbell plate; 142. Threaded rod; 144. First circular plane; 146. Second circular plane. DETAILED DESCRIPTION

[0038] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0040] Refer to the following Figures 1 to 8 Adjustable dumbbells according to some embodiments of the present invention are described.

[0041] In one embodiment of the present invention, Figure 1As shown, an adjustable dumbbell is proposed, including: a dumbbell body 10; a dumbbell plate assembly 12, the dumbbell plate assembly 12 is arranged at both ends of the dumbbell body 10, and the dumbbell plate assembly 12 is provided with a radial groove; a fixed shaft 14, the fixed shaft 14 passes through the radial groove and is connected to the dumbbell body 10, and the top of the radial groove is in contact with the fixed shaft 14.

[0042] The present invention proposes an adjustable dumbbell, comprising a dumbbell plate assembly 12, a fixed shaft 14 and a dumbbell body 10. The dumbbell plate assembly 12 is arranged at both ends of the dumbbell body 10, and the dumbbell plate assembly 12 is provided with a radial groove. The fixed shaft 14 passes through the radial groove and is connected to the dumbbell body 10, and the top of the radial groove is in contact with the fixed shaft 14. By cooperating with the dumbbell body 10 and the fixed shaft 14, the dumbbell plate assembly 12 can be stably placed on the fixed shaft 14, so that the user can increase the weight of the dumbbell based on his or her training needs, reducing the cost required by the user and improving the flexibility of the dumbbell and the user's experience. At the same time, by cooperating with the dumbbell body 10 and the fixed shaft 14, the dumbbell plate assembly 12 in the middle is clamped from both sides, thereby improving the overall stability and reliability of the product.

[0043] Furthermore, in some embodiments of the present invention, Figure 2 As shown, the dumbbell body 10 includes: a fixed handlebar shaft 102; basic dumbbell plates 104, and there are two basic dumbbell plates 104, which are fixedly connected to the two ends of the fixed handlebar shaft 102 respectively; wherein, the basic dumbbell plates 104 are provided with circular openings, which are adapted to the two ends of the fixed handlebar shaft 102.

[0044] In this embodiment, the dumbbell body 10 includes a fixed handlebar shaft 102 and basic dumbbell plates 104. The basic dumbbell plates 104 are provided with two circular openings, each of which fits over the ends of the fixed handlebar shaft 102. The fixed handlebar shaft 102 is fixedly connected to the circular openings, i.e., the ends of the fixed handlebar shaft 102 are connected to the basic dumbbell plates 104 through the circular openings. The fixed connection between the fixed handlebar shaft 102 and the basic dumbbell plates 104 enhances structural stability and connection strength, preventing accidents caused by loosening or falling off during exercise. This reduces production cost and complexity, and improves the overall stability and safety of the dumbbell.

[0045] Specifically, the ends of the fixed handlebar shaft 102 are processed by a shrinking process, that is, the radius of the two ends of the fixed handlebar shaft 102 is smaller than the radius of the middle position of the fixed handlebar shaft 102. The shrinking process facilitates the insertion of the fixed handlebar shaft 102 into the circular opening, and only the radius of the two ends is reduced, which makes it easier for the user to exert force when using the dumbbell, thereby improving the user experience.

[0046] Preferably, the fixed handlebar shaft 102 and the basic dumbbell plate 104 are first pressed together by a press, and then the fixed handlebar shaft 102 and the basic dumbbell plate 104 are connected by welding.

[0047] Furthermore, in some embodiments of the present invention, Figures 3 to 6 As shown, the dumbbell plate assembly 12 includes: a first dumbbell plate 122, a first connecting buckle 124 is provided on one side of the first dumbbell plate 122; at least one second dumbbell plate 126, a first connecting buckle 124 is provided on one side of the second dumbbell plate 126, and a first groove is provided on the other side of the second dumbbell plate 126; wherein, the basic dumbbell plate 104 is provided with a first groove on a side away from the fixed handlebar shaft 102, the first connecting buckle 124 is adapted to the first groove, and the first dumbbell plate 122, the second dumbbell plate 126 and the basic dumbbell plate 104 are all connected to the first groove through the first connecting buckle 124.

[0048] In this embodiment, the dumbbell plate assembly 12 includes a first dumbbell plate 122 and at least one second dumbbell plate 126. A first connecting buckle 124 is provided on one side of the first dumbbell plate 122 and one side of the second dumbbell plate 126. A first groove is provided on the other side of the second dumbbell plate 126. The first groove is provided on the side of the basic dumbbell plate 104 away from the fixed handlebar shaft 102, and the first connecting buckle 124 is adapted to fit within the first groove. The first connecting buckle 124 cooperates with the first groove to connect any two of the first dumbbell plate 122, the second dumbbell plate 126, and the basic dumbbell plate 104. This ensures a secure connection between the first dumbbell plate 122, the second dumbbell plate 126, and the basic dumbbell plate 104, preventing accidents caused by loose connections or detachment during exercise, thereby improving product safety.

[0049] Specifically, if at least one second dumbbell plate is arranged between the first dumbbell plate and the basic dumbbell plate.

[0050] Preferably, the shape of the first dumbbell piece 122 and the shape of the second dumbbell piece 126 are both circular with one end flattened. By designing in this way, the flattened end can be placed on the ground more stably.

[0051] Furthermore, in some embodiments of the present invention, the first dumbbell piece 122 and the second dumbbell piece 126 are both provided with a strip-shaped opening; wherein both ends of the strip-shaped opening are semicircular, and the strip-shaped opening is located above the radial groove.

[0052] In this embodiment, both the first dumbbell plate 122 and the second dumbbell plate 126 are provided with a strip-shaped opening, wherein the ends of the strip-shaped opening are semicircular and located above the radial slot. The provision of the strip-shaped opening with semicircular ends makes it easier for the user to insert their fingers or palm through the opening, thereby easily picking up the dumbbell plate. This reduces the risk of slipping caused by directly grabbing smooth or heavy dumbbell plates, thereby improving convenience and safety during use. Furthermore, the placement of the strip-shaped opening above the radial slot makes it easier for the user to place the dumbbell plate assembly 12 on the fixed shaft 14 when adding weight to the dumbbell, thus enhancing the user experience.

[0053] Furthermore, in some embodiments of the present invention, a side of the first dumbbell piece 122 on which the first connecting buckle 124 is provided and a side of the second dumbbell piece 126 on which the first connecting buckle 124 is provided are both provided with a second groove; wherein, the first connecting buckle 124 is partially located in the second groove, the first connecting buckle 124 is provided with a first through hole, the second groove is provided with a second through hole, and the first connecting buckle 124 and the second groove are connected by a first connecting piece.

[0054] In this embodiment, a second groove is defined on one side of both the first dumbbell piece 122 and the second dumbbell piece 126. Part of the first connecting buckle 124 is located within the second groove. Furthermore, the first connecting buckle 124 has a first through-hole, and the second groove has a second through-hole. The first connecting buckle 124 and the second groove are connected via a first connecting member. This connection between the first connecting buckle 124 and the second groove via the first connecting member enhances the stability of the connection, preventing the dumbbells from separating easily, improving user experience and product safety.

[0055] Preferably, the first connecting member is a screw, and the first through hole and the second through hole are both threaded holes. This design facilitates replacement when the first connecting buckle 124 is damaged.

[0056] Preferably, the second through hole is a through hole, so that the contact area between the first connecting member and the dumbbell plate assembly 12 is larger, thereby improving the stability of the structure.

[0057] Furthermore, in some embodiments of the present invention, the depth of the first groove is greater than the depth of the second groove.

[0058] In this embodiment, the depth of the first groove is greater than the depth of the second groove. Because in the above solution, the first connecting buckle 124 and the second groove are connected by the first connecting member, the second groove only needs to serve a positioning function. On this basis, placing the first connecting buckle 124 outside the second groove allows for a more complete engagement with the first groove, which can further facilitate the connection between the first connecting buckle 124 and the second groove via the first connecting member. By setting the depth of the first groove greater than the depth of the second groove, the stability and reliability of the overall structure are improved, and the assembly quality and user experience are enhanced.

[0059] Furthermore, in some embodiments of the present invention, a plurality of notches are provided on the first dumbbell piece 122 , and the plurality of notches are designed to be symmetrical with the radial groove as the axis; wherein the weight of the first dumbbell piece 122 is less than the weight of the second dumbbell piece 126 .

[0060] In this embodiment, the first dumbbell plate 122 is provided with multiple notches, which are designed symmetrically about the radial groove. The weight of the first dumbbell plate 122 is less than that of the second dumbbell plate 126. This design allows the weight of the first dumbbell plate 122 to be adjusted without changing its thickness. Furthermore, the first dumbbell plate 122 does not reduce its thickness to reduce weight, which would result in it being too thin and susceptible to damage during processing. By providing multiple notches in the first dumbbell plate 122, designed symmetrically about the radial groove, the structural integrity and strength of the dumbbell plate are maintained, enhancing the user experience.

[0061] Preferably, the weight of the second dumbbell plate 126 is twice the weight of the first dumbbell plate 122 .

[0062] Furthermore, in some embodiments of the present invention, Figure 5 As shown, the fixed shaft 14 includes a head and a threaded rod 142 fixedly connected to the head. The head includes a first circular flat surface 144 and a second circular flat surface 146. The radius of the second circular flat surface 146 is smaller than that of the first circular flat surface 144. The second circular flat surface 146 is disposed on the first circular flat surface 144, and the threaded rod 142 is disposed on the second circular flat surface 146.

[0063] In this embodiment, the fixed shaft 14 includes a head and a threaded rod 142, which is fixedly connected to the head. The head includes a first circular flat surface 144 and a second circular flat surface 146. The radius of the second circular flat surface 146 is smaller than that of the first circular flat surface 144. The second circular flat surface 146 is located on the first circular flat surface 144, and the threaded rod 142 is located on the second circular flat surface 146. The design of the first circular flat surface 144 and the second circular flat surface 146 facilitates the user's application of force when tightening the fixed shaft 14, improves grip stability, optimizes force transmission, and enhances connection reliability.

[0064] Furthermore, in some embodiments of the present invention, Figure 8 As shown, the interior of the fixed handlebar shaft 102 is a hollow structure, and the fixed shaft 14 is a semi-threaded structure.

[0065] In this embodiment, the interior of the fixed handlebar shaft 102 is a hollow structure, and the fixed shaft 14 is a semi-threaded structure. By setting the fixed shaft 14 to a semi-threaded structure, the radial groove can make the bolt more flexible and convenient when installing and removing.

[0066] Furthermore, in some embodiments of the present invention, the interior of the fixed handlebar shaft 102 is a hollow structure, and the fixed shaft 14 is a fully threaded structure.

[0067] In this embodiment, the interior of the fixed handlebar shaft 102 is hollow, and the fixed shaft 14 is fully threaded. By configuring the fixed shaft 14 as a fully threaded structure, a higher connection strength is provided, ensuring a stable and reliable connection. In the claims, specification, and drawings of this utility model, the term "plurality" refers to two or more. Unless otherwise expressly specified, the terms "upper" and "lower" and other designations of orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are intended solely to facilitate the description of the utility model and to simplify the description process. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation as described. Therefore, these descriptions should not be construed as limitations on the utility model. The terms "connect," "mount," and "fix" are to be understood broadly. For example, "connection" can mean a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection between multiple objects; it can mean a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances of the above data.

[0068] In the claims, specification, and drawings of the present invention, the terms "one embodiment," "some embodiments," "a specific embodiment," and the like mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In the claims, specification, and drawings of the present invention, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An adjustable dumbbell, characterized in that: include: dumbbell body (10); A dumbbell plate assembly (12), the dumbbell plate assembly (12) being arranged at both ends of the dumbbell body (10), the dumbbell plate assembly (12) being provided with radial grooves; A fixed shaft (14) passes through the radial slot and is connected to the dumbbell body (10), and the top end of the radial slot is in contact with the fixed shaft (14).

2. The adjustable dumbbell according to claim 1, characterized in that The dumbbell body (10) comprises: Fixing the handlebar (102); Basic dumbbell plates (104), the number of the basic dumbbell plates (104) being two, and being fixedly connected to both ends of the fixed handlebar shaft (102) respectively; The basic dumbbell plate (104) is provided with a circular opening, and the circular opening is adapted to the two ends of the fixed handlebar shaft (102).

3. The adjustable dumbbell according to claim 2, characterized in that The dumbbell plate assembly (12) comprises: A first dumbbell piece (122), wherein a first connecting buckle (124) is provided on one side of the first dumbbell piece (122); at least one second dumbbell piece (126), wherein one side of the second dumbbell piece (126) is provided with the first connecting buckle (124), and the other side of the second dumbbell piece (126) is provided with a first groove; The first groove is provided on a side of the basic dumbbell piece (104) away from the fixed handle shaft (102), the first connecting buckle (124) is adapted to the first groove, and the first dumbbell piece (122), the second dumbbell piece (126) and the basic dumbbell piece (104) are all connected to the first groove via the first connecting buckle (124).

4. The adjustable dumbbell according to claim 3, characterized in that The first dumbbell piece (122) and the second dumbbell piece (126) are both provided with a strip-shaped opening; Wherein, both ends of the strip-shaped opening are semicircular, and the strip-shaped opening is located above the radial groove.

5. The adjustable dumbbell according to claim 3, characterized in that A second groove is provided on one side of the first dumbbell piece (122) provided with the first connecting buckle (124) and a second groove is provided on one side of the second dumbbell piece (126) provided with the first connecting buckle (124); The first connecting buckle (124) is partially located in the second groove, the first connecting buckle (124) is provided with a first through hole, the second groove is provided with a second through hole, and the first connecting buckle (124) and the second groove are connected via a first connecting member.

6. The adjustable dumbbell according to claim 5, characterized in that The depth of the first groove is greater than the depth of the second groove.

7. The adjustable dumbbell according to claim 3, characterized in that The first dumbbell plate (122) is provided with a plurality of notches, and the plurality of notches are designed to be symmetrical with respect to the radial groove; Wherein, the weight of the first dumbbell piece (122) is less than the weight of the second dumbbell piece (126).

8. The adjustable dumbbell according to claim 1, wherein: The fixed shaft (14) comprises: head; a threaded rod (142), the threaded rod (142) being fixedly connected to the head; Wherein, the header includes: a first circular plane (144); A second circular plane (146), the radius of which is smaller than the radius of the first circular plane (144), the second circular plane (146) is arranged on the first circular plane (144), and the threaded rod (142) is arranged on the second circular plane (146).

9. The adjustable dumbbell according to any one of claims 2 to 7, characterized in that: The interior of the fixed handlebar shaft (102) is a hollow structure, and the fixed shaft (14) is a semi-threaded structure.

10. The adjustable dumbbell according to any one of claims 2 to 7, characterized in that: The interior of the fixed handlebar shaft (102) is a hollow structure, and the fixed shaft (14) is a fully threaded structure.

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