New adjustable dumbbells and dumbbell sets

Abstract

We offer new adjustable dumbbells and dumbbell sets. The device comprises a dumbbell body (1) including a dumbbell shaft and dumbbell housings fitted over and connected to both ends of the dumbbell shaft; one or more weight plates (2) each having one or more dumbbell grooves and mounted cumulatively on the dumbbell body; and an adjustment mechanism (3) attached to the dumbbell body and including one or more adjustment blocks, each of which includes one or more adjustment sections, the number of which corresponds to the number of weight plates, each of which is slidably fitted into the adjustment housing. This device improves the weight adjustment efficiency of adjustable dumbbells.

Description

[Technical Field]

[0001] This application relates to the field of dumbbells, and more particularly to novel adjustable dumbbells and dumbbell sets. [Background technology]

[0002] Dumbbells are widely used as fitness equipment, and dumbbells that are easy to adjust in weight are particularly popular among many fitness enthusiasts. Users need to adjust different weights or different numbers of weight plates to achieve a variety of weight adjustments.

[0003] Currently, a relatively common adjustable dumbbell generally comprises a dumbbell body and a plurality of weight plates that are cumulatively attached to the dumbbell body. The dumbbell body includes a dumbbell housing and a dumbbell shaft. The dumbbell housing has a plurality of through-holes, each of which is uniformly distributed along the height of the dumbbell housing. When the dumbbell body is connected to the dumbbell shaft, the dumbbell shaft is inserted into one of the through-holes. Each weight plate has a through-hole, each of which faces directly opposite and communicates with the corresponding through-hole. When the dumbbell shaft is inserted into one of the through-holes, the dumbbell The shafts are simultaneously inserted into the dumbbell holes corresponding to the adjustment holes, so that the number of weight plates added to the dumbbell body is the number from the weight plates connected to the dumbbell shaft to the weight plates abutting the dumbbell housing. When the weight of the adjustable dumbbell needs to be adjusted, the dumbbell shaft needs to be disconnected from the dumbbell housing, and the adjustment holes through which the dumbbell shaft is inserted can be changed to adjust the number of weight plates from the weight plates connected to the dumbbell shaft to the weight plates abutting the dumbbell housing, thereby completing the weight adjustment of the adjustable dumbbell.

[0004] In contrast to the above-mentioned related art, although adjustable dumbbells allow weight adjustment, the user must first detach the dumbbell shaft from the dumbbell housing, and then determine the position of the adjustment hole through which the dumbbell shaft passes according to the required adjustable dumbbell weight. This takes time and effort to adjust the weight of the adjustable dumbbell, resulting in a decrease in the efficiency of dumbbell weight adjustment and making it difficult to adjust the dumbbell weight frequently, which affects the effectiveness of training using the dumbbell. Summary of the Invention [Problem to be solved by the invention]

[0005] In order to improve the efficiency of adjusting the weight of adjustable dumbbells, the present application provides a new adjustable dumbbell and dumbbell set. [Means for solving the problem]

[0006] The new adjustable dumbbells and dumbbell sets of the present invention adopt the following technical solutions:

[0007] A new adjustable dumbbell, comprising: a dumbbell body including a dumbbell shaft and a dumbbell housing fitted onto both ends of the dumbbell shaft and connected to both ends of the dumbbell shaft; One or more weight plates each having one or more dumbbell grooves and attached to the dumbbell body in a cumulative manner; an adjustment mechanism provided on the dumbbell body and including one or more adjustment blocks, wherein the adjustment block includes one or more adjustment sections, the number of which corresponds to the number of weight plates, and each of the adjustment sections is slidably fitted into an adjustment housing; When the adjustment block slides away from the dumbbell body, each adjustment portion is inserted into the dumbbell groove corresponding to each weight plate, and each weight plate is added cumulatively to the dumbbell body.

[0008]

[0003] By adopting the above technical solution, when adjusting the weight of an adjustable dumbbell, the adjustment block is slidably driven away from the dumbbell body, and the adjustment parts corresponding to the number of weight plates that need to be added are inserted into the dumbbell grooves, respectively, so that the weight plates that need to be added are attached to the dumbbell body in a cumulative manner, quickly completing the weight adjustment of the adjustable dumbbell. Although adjustable dumbbells allow weight adjustment, the user must first remove the dumbbell shafts from the dumbbell housing and then determine the positions of the adjustment holes through which the dumbbell shafts are inserted according to the desired dumbbell weight. This solves the problem that adjusting the weight of an adjustable dumbbell is time-consuming and results in reduced efficiency, making it difficult to adjust the dumbbell weight frequently, and affecting the effectiveness of training using the dumbbells.

[0009] In one embodiment of the present disclosure, the adjusting block further includes a fixed portion, the fixed portion is slidably fitted to the dumbbell housing, each of the adjusting portions is fixed to the fixed portion, and each of the adjusting portions is uniformly distributed along the length of the fixed portion.

[0010] In one embodiment of the present disclosure, the length dimension of each of the adjustment portions gradually increases or decreases from one end of the fixed portion in the length direction to the other end of the fixed portion in the length direction.

[0011] In one embodiment of the present disclosure, the dumbbell shafts are each slidably fitted into the dumbbell housing, and when sliding toward or away from the dumbbell body, each of the adjustment blocks slides toward or away from the dumbbell body via one or two slide rods; a central rod rotatably mounted on the dumbbell housing; Each of the slide rods includes one or two threaded rods that are fixedly connected to the central rod, rotate with the rotation of the central rod, and are threadedly inserted into each of the slide rods.

[0012] In one embodiment of the present disclosure, the number of the adjustment blocks corresponds to the number of the slide rods, a fixed protrusion block is fixedly provided on the fixing part, a fixing groove is opened in the slide rod, and when the fixing part is fixedly connected to the slide rod, the fixed protrusion block is inserted into the fixing groove and engaged.

[0013] In one embodiment of the present disclosure, the adjustment mechanism comprises: a shift assembly including a shift wheel, the shift wheel being fixedly mounted to a dumbbell housing, the shift wheel having a plurality of shift holes formed therein, the shift holes being uniformly distributed circumferentially about an axis of the shift wheel; One or more shift balls that are slidably fitted on the central rod along the axial direction and are lockingly fitted into any of the shift holes; a shift spring, the number of which corresponds to the number of shift balls, one end of which is connected to the center rod and the other end of which is connected to the shift balls; When adjusting the weight of the adjustable dumbbell, the shift ball is removed from one shift hole and inserted into the other shift hole.

[0014] In one embodiment of the present disclosure, the dumbbell housing has a plurality of sets of scale holes formed therethrough, the number of the scale holes corresponding to the number of the adjustment blocks, the scale holes each including a plurality of scale portions, the number of the scale portions corresponding to the number of the weight plates, Each of the scales has a different weight adjustment scale engraved on one side thereof, A scale block is fixedly connected to each of the adjustment blocks, and when the scale block faces one of the scale portions, the adjustment scale on one side of the facing scale portion corresponds to the weight of the adjustment dumbbell.

[0015] In one embodiment of the present disclosure, the adjustment mechanism comprises: a lock assembly including a lock wheel, the lock wheel being coaxially fixed to a central rod, the lock wheel having a plurality of lock grooves formed therein, the lock grooves being uniformly distributed circumferentially around the axis of the lock wheel; The lock assembly further includes a lock block that is slidably fitted into the dumbbell housing along the vertical direction, and a lock protrusion block is fixedly connected to the lock block. When the lock assembly is locked, the lock protrusion block is inserted into one of the lock grooves and engaged, thereby fixing the central rod to the dumbbell housing.

[0016] The dumbbell set comprises an adjustable dumbbell and a dumbbell base for accommodating the adjustable dumbbell, and the dumbbell base has an accommodating groove for accommodating the adjustable dumbbell.

[0017] In one embodiment of the present disclosure, an unlocking block used to unlock the locking assembly is provided in the receiving groove, and when the adjustable dumbbell is placed on the dumbbell base, the unlocking block abuts against the locking block, and by driving the locking block in a direction away from the locking wheel, the locking protrusion block disengages from the locking groove, thereby unlocking the locking assembly. [Effects of the Invention]

[0018] As described above, the present application has at least one of the following beneficial technical effects. When adjusting the weight of the adjustable dumbbell, the adjustment block slides away from the dumbbell body, allowing the adjustment parts corresponding to the number of weight plates that need to be added to be inserted into the dumbbell grooves, so that the weight plates that need to be added are attached to the dumbbell body in a cumulative manner, quickly completing the weight adjustment of the adjustable dumbbell. While adjustable dumbbells allow weight adjustment, the user must first remove the dumbbell shaft from the dumbbell housing and then determine the position of the adjustment hole through which the dumbbell shaft passes depending on the desired dumbbell weight. This solves the problem that adjusting the weight of an adjustable dumbbell is time-consuming and results in reduced efficiency, making it difficult to adjust the dumbbell weight frequently and affecting the effectiveness of training using the dumbbell. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a schematic diagram of the overall structure of an adjustable dumbbell. [Figure 2] FIG. 1 is a schematic diagram of the exploded structure of an adjustable dumbbell. [Figure 3] Schematic diagram of the weight plate structure of an adjustable dumbbell. [Figure 4] 1 is a schematic diagram of the dumbbell body structure of an adjustable dumbbell. [Figure 5] 1 is a schematic diagram of the dumbbell shaft structure of an adjustable dumbbell. [Figure 6] 1 is a schematic diagram of the central rod structure of an adjustable dumbbell. [Figure 7] 1 is a schematic diagram of the dumbbell housing structure of an adjustable dumbbell. [Figure 8] 1 is a schematic diagram of the structure of the adjustment part of an adjustable dumbbell. [Figure 9] FIG. 1 is a schematic diagram of the fixed part structure of an adjustable dumbbell. [Figure 10] FIG. 5 is an enlarged view of part A in FIG. [Figure 11] FIG. 1 is a schematic diagram of the installation of the locking assembly of the adjustable dumbbell. [Figure 12] FIG. 1 is a structural schematic diagram of the locking assembly of the adjustable dumbbell. [Figure 13] FIG. 1 is a structural schematic diagram of the shift assembly of the adjustable dumbbell. [Figure 14] FIG. 1 is a schematic diagram of the overall structure of a dumbbell set. [Figure 15] This is a schematic diagram of the disassembly of a dumbbell set. [Figure 16] This is a schematic diagram 2 of a disassembled dumbbell set. DETAILED DESCRIPTION OF THE INVENTION

[0020] The present invention will be described in more detail below with reference to FIGS.

[0021] The present invention discloses a novel adjustable dumbbell and dumbbell set. Referring to Figures 1, 2, and 3, the novel adjustable dumbbell includes a dumbbell body 1, a plurality of weight plates 2, and an adjustment mechanism 3. Each weight plate 2 is attached to the dumbbell body 1 in an additive manner, with dumbbell grooves 21 extending through each weight plate 2 on opposite sides. The adjustment mechanism 3 is located inside the dumbbell body 1.

[0022] Referring to FIG. 4, dumbbell body 1 comprises dumbbell shaft 11 and dumbbell housing 12. Dumbbell shaft 11 is cylindrical, and dumbbell housing 12 is fitted onto both ends of dumbbell shaft 11, so that dumbbell shaft 11 is located midway inside dumbbell housing 12, and dumbbell housing 12 has a hollow waist-like shape in plan view. In the embodiment of the present application, the axial direction of dumbbell shaft 11 is defined as the axial direction, the height direction of dumbbell housing 12 is defined as the vertical direction, and the straight lines on both sides of the arc-shaped dumbbell housing 12 are defined as the length direction.

[0023] Referring to FIG. 5 , the dumbbell shaft 11 includes two sliding rods 111, a central rod 112, and two threaded rods 113. The two sliding rods 111 are located on either side of the dumbbell housing 12 in the longitudinal direction, and are slidably fitted inside the dumbbell housing 12 along the longitudinal direction. The central rod 112 is mounted on the dumbbell housing 12. The two threaded rods 113 are fixedly connected to both ends of the central rod 112. The two threaded rods 113 are inserted into the two sliding rods 111 at intermediate positions, and are screwed into the two sliding rods 111, respectively. Thus, the central rod 112 is rotatably mounted on the dumbbell housing 12. When the central rod 112 rotates axially relative to the dumbbell housing 12, the two threaded rods 113 rotate simultaneously, and the two threaded rods 113 slide the two sliding rods 111 toward or away from the dumbbell housing 12, respectively.

[0024] Referring to FIG. 6, a friction sleeve 1121 is fixedly connected to the outer periphery of the central rod 112, and the friction sleeve 1121 is used to increase the friction force of the outer periphery of the central rod 112.

[0025] 7 and 8, the adjustment mechanism 3 includes two adjustment blocks 31, which are slidably fitted to both sides of the arc-shaped dumbbell housing 12 along the length thereof. The two adjustment blocks 31 are arranged opposite each other. Each of the two adjustment blocks 31 includes a plurality of adjustment sections 311 and a fixed section 312. The number of adjustment sections 311 corresponds to the number of weight plates 2. Each adjustment section 311 is fixedly connected to one side of the fixed section 312. The fixed section 312 has a rectangular shape. The adjustment sections 311 are uniformly distributed along the length of the fixed section 312. Each adjustment section 311 faces a corresponding dumbbell groove 21 on one side of each weight plate 2. When the weight plates 2 are attached to the dumbbell body 1 in an accumulated manner, the adjustment sections 311 corresponding to the two adjustment blocks 31 are inserted directly into the two dumbbell grooves 21 corresponding to each weight plate 2.

[0026] A plurality of sliding posts 123 are fixed to dumbbell housing 12, and a plurality of sliding holes are drilled through fixed part 312. When fixed part 312 is installed on dumbbell housing 12, each sliding post 123 is inserted into each sliding hole and slidably fitted therein. As a result, adjusting block 31 is slidably fitted to both sides of the arc-shaped dumbbell housing 12 along the length direction, and the sliding fit between adjusting block 31 and dumbbell housing 12 is more stable.

[0027] 7 and 8, the length of each adjusting portion 311 gradually increases or decreases from one longitudinal end of fixed portion 312 to the other longitudinal end of fixed portion 312. In the embodiment of the present application, the length of each adjusting portion 311 gradually decreases from one side of fixed portion 312 closer to the top of dumbbell housing 12 to one side of fixed portion 312 closer to the bottom of dumbbell housing 12. As a result, when each weight plate 2 is attached to dumbbell body 1 in an incremental manner, each weight plate 2 is attached to dumbbell body 1 in an incremental manner from one side closer to the top of dumbbell housing 12 to one side closer to the bottom of dumbbell housing 12, and each weight plate 2 is attached to dumbbell body 1 more stably in an incremental manner.

[0028] Referring to FIG. 9 , a fixed protrusion block 3121 is fixedly provided on each of the two fixed parts 312 on the side close to the two slide rods 111, and the fixed protrusion block 3121 includes four first arc-shaped parts 31211 and four second arc-shaped parts 31212, and the first arc-shaped parts 31211 and the second arc-shaped parts 31212 are fixedly connected alternately to form a closed ring, thereby constituting the fixed protrusion block 3121. In the embodiment of the present application, the radius of the first arc-shaped part 31211 is 1 / 2 the radius of the second arc-shaped part 31212. The radius of the shaped portion 31212 is larger than the radius of the shaped portion 31212, and a fixing groove 1111 is opened on the side of each of the two sliding rods 111 closest to the two fixed portions 312. When the fixed portion 312 is fixedly connected to the sliding rod 111, the fixed protrusion block 3121 is inserted into the fixing groove 1111 and engaged. As a result, when the fixed portion 312 is fixedly connected to the sliding rod 111, relative rotation between the fixed portion 312 and the sliding rod 111 is less likely to occur, and the connection stability between the fixed portion 312 and the sliding rod 111 is better.

[0029] Referring to FIG. 10, two sets of through-holes 121 are drilled at the top of the dumbbell housing 12, and each of the two sets of through-holes 121 corresponds to two adjusting blocks 31. The through-holes 121 include a plurality of through-hole scales 1211, the number of which corresponds to the number of weight plates 2. One side of each scale 1211 is engraved with a numerical value of an adjusting scale 1212 indicating the weight of a different adjustable dumbbell, thereby intuitively indicating the weight of the adjustable dumbbell. A scale block 313 is fixedly connected to the top of each of the two adjusting blocks 31, and the adjusting blocks 31 are fixedly connected to the top of each adjusting block 31. When the hook 31 slides toward or away from the dumbbell housing 12, the scale block 313 moves toward or away from the dumbbell housing 12 along its length. When the scale block 313 faces one of the scale sections 1211, the user can observe the scale section 1211 of the scale block 313. The adjustment scale 1212 on one side of the scale section 1211 indicates the weight of the adjustable dumbbell at that time. This allows the user to quickly determine the weight of the adjustable dumbbell and easily adjust the weight of the adjustable dumbbell according to the user's required weight.

[0030] 11 and 12, the adjusting mechanism 3 further includes two sets of locking assemblies 32, which are respectively provided on both sides of the dumbbell housing 12 in the longitudinal direction. The locking assemblies 32 include a locking wheel 321, a locking block 322, and two locking springs 323. The locking wheel 321 is coaxially fixed to one end of the center rod 112. A plurality of locking grooves 3211 are formed on the outer circumferential surface of the locking wheel 321, and each of the locking grooves 3211 is uniformly distributed around the axis of the locking wheel 321. A plurality of sliding grooves 3221 are formed through the locking block 322, and the longitudinal direction of each sliding groove 3221 is aligned vertically. A plurality of fixed blocks 122 are fixedly provided inside the dumbbell housing 12, and each of the fixed blocks 122 is slidably inserted into each sliding groove 3221, so that each locking block Lock block 322 is slidably fitted into dumbbell housing 12 along the vertical direction, and lock protrusion block 3222 is fixedly connected to lock block 322. When lock assembly 32 is locked, lock protrusion block 3222 is inserted into one of lock grooves 3211 and engaged, thereby fixing central rod 112 to dumbbell housing 12. An unlock protrusion block 3223 is fixedly connected to the bottom of lock block 322. An unlock groove is formed through the bottom of dumbbell housing 12, and unlock protrusion block 3223 is inserted into the unlock groove and slidably fitted into it. Two lock springs 323 are located between lock block 322 and dumbbell housing 12. One end of each of the two lock springs 323 is fixedly connected to lock block 322, and the other end of each of the two lock springs 323 is fixedly connected to dumbbell housing 12.

[0031] Referring to FIG. 13 , the adjustment mechanism 3 further includes two sets of shift assemblies 33, which are respectively provided on both sides of the dumbbell housing 12 in the longitudinal direction. Each shift assembly 33 includes a shift wheel 331, two shift balls 332, and two shift springs 333. The shift wheel 331 is fixedly provided at an end of the dumbbell housing 12 close to the slide rod 111 and is provided coaxially with the slide rod 111. The shift wheel 331 has a plurality of shift holes 3311, which are uniformly distributed around the axis of the shift wheel 331. The two shift balls 332 are slidably fitted into the lock wheel 321 along the axial direction. The two shift balls 332 are uniformly distributed around the axis of the locking wheel 321, and the two shift balls 332 are respectively engaged with two shift holes 3311. One end of each of the two shift springs 333 is fixedly connected to the locking wheel 321, and the other end of each of the two shift springs 333 is respectively connected to the two shift balls 332. When adjusting the weight of the adjustable dumbbell, the two shift balls 332 are respectively detached from the two opposite shift holes 3311 and inserted into the other two opposite shift holes 3311. During the process of the two shift balls 332 being detached from the shift holes 3311 and re-engaged into the shift holes 3311, a "click" sound is generated, notifying the user that the weight of the adjustable dumbbell has been changed.

[0032] The principle of implementation of the new adjustable dumbbell according to the embodiment of the present application is as follows: When adjusting the weight of the adjustable dumbbell, the adjustment block 31 slides away from the dumbbell body 1, and the adjustment parts 311 corresponding to the number of weight plates 2 that need to be added are inserted into the dumbbell grooves 21, respectively. Thus, the weight plates 2 that need to be added are incrementally attached to the dumbbell body 1, quickly completing the weight adjustment of the adjustable dumbbell. Although adjustable dumbbells allow weight adjustment, the user must first detach the dumbbell shafts 11 from the dumbbell housing 12 and then determine the position of the adjustment holes through which the dumbbell shafts 11 are inserted according to the desired dumbbell weight. This solves the problem of time-consuming and laborious weight adjustment, which results in reduced efficiency in adjusting the dumbbell weight and makes it difficult to adjust the dumbbell weight frequently, thereby affecting the effectiveness of training using the dumbbells.

[0033] As can be seen from the above, when the central rod 112 and the slide rod 111 are rotatable relative to each other, i.e., when the central rod 112 and the dumbbell housing 12 are rotatable relative to each other, the lock assembly 32 needs to be unlocked, and when the lock assembly 32 is unlocked, the lock protrusion block 3222 and the lock groove 3211 need to be disengaged from each other.

[0034] For this reason, this embodiment further provides a dumbbell set. Referring to Figures 14, 15 and 16, the dumbbell set includes an adjustable dumbbell 10 and a dumbbell base 20 for receiving the adjustable dumbbell 10. The dumbbell base 20 has a receiving groove in which two unlocking blocks 200 are fixedly mounted for unlocking the lock assembly 32. The two unlocking blocks 200 face the two unlocking protrusion blocks 3223, respectively. When the adjustable dumbbell 10 is placed in the receiving groove, the two unlocking blocks 200 abut against and fit into the two unlocking protrusion blocks 3223. Under the weight of the adjustable dumbbell 10 itself, the two unlocking blocks 200 push the two unlocking protrusion blocks 3223 to slide vertically toward the dumbbell housing 12, thereby locking the lock block 322 vertically. 3, the locking spring 323 resets the locking block 322, causing the locking protrusion block 3222 to re-engage with one of the locking grooves 3211, locking the locking assembly 32, and the locking assembly 32 is pushed away from the locking wheel 321, disengaging the locking protrusion block 3222 from the locking groove 3211. This disengages the locking assembly 32, allowing the central rod 112 and the sliding rod 111 to rotate relative to each other, completing the weight adjustment of the adjustable dumbbell 10. After the weight adjustment of the adjustable dumbbell 10 is completed and the adjustable dumbbell 10 is lifted for training, the two unlocking blocks 200 disengage from the two unlocking protrusion blocks 3223, causing the locking spring 323 to reset the locking block 322, causing the locking protrusion block 3222 to re-engage with one of the locking grooves 3211, locking the locking assembly 32, and fixing the central rod 112 and the sliding rod 111 relative to each other. This makes it easier to adjust the weight of the adjustable dumbbell 10, and improves the stability of the adjustable dumbbell 10 when in use.

[0035] The above are all preferred embodiments of the present application, and do not limit the scope of protection of the present application, so that any equivalent changes made according to the structure, shape and principle of the present application should be included within the scope of protection of the present application. [Explanation of symbols]

[0036] 1, dumbbell body, 11, dumbbell shaft, 111, slide rod, 1111, fixed groove, 112, center rod, 1121, friction sleeve, 113, threaded rod, 12, dumbbell housing, 121, scale hole, 1211, scale portion, 1212, adjustment scale, 122, fixed block, 123, slide column, 2, weight plate, 21, dumbbell groove, 3, adjustment mechanism, 31, adjustment block, 311, adjustment portion, 312, fixing portion, 3121, fixed protrusion block, 31211, first circular arc shaped portion, 31212, second arc-shaped portion, 313, scale block, 32, lock assembly, 321, lock wheel, 3211, lock groove, 322, lock block, 3221, slide groove, 3222, lock protrusion block, 3223, unlock protrusion block, 323, lock spring, 33, shift assembly, 331, shift wheel, 3311, shift hole, 332, shift ball, 333, shift spring, 10, adjustable dumbbell, 20, dumbbell base, 200, unlock block.

Claims

1. A new adjustable dumbbell, a dumbbell body including a dumbbell shaft and a dumbbell housing fitted onto both ends of the dumbbell shaft and connected to both ends of the dumbbell shaft; One or more weight plates each having one or more dumbbell grooves and mounted in a cumulative manner on the dumbbell body; an adjustment mechanism provided on the dumbbell body, the adjustment mechanism including one or more adjustment blocks; the adjustment block includes one or more adjustment portions, the number of which corresponds to the number of the weight plates, and each of the adjustment portions is slidably fitted into an adjustment housing; When the adjustment block slides away from the dumbbell body, each adjustment part is inserted into a corresponding dumbbell groove of each weight plate, and each weight plate is added to the dumbbell body in an accumulated manner.

2. The new adjustable dumbbell of claim 1, characterized in that the adjusting block further includes a fixed portion, the fixed portion is slidably fitted to the dumbbell housing, each of the adjusting portions is fixed to the fixed portion, and each of the adjusting portions is uniformly distributed along the length of the fixed portion.

3. The new adjustable dumbbell according to claim 2, wherein the length of each of the adjustable parts gradually increases or decreases from one end of the fixed part in the length direction to the other end of the fixed part in the length direction.

4. The dumbbell shaft is one or two slide rods, each of which is slidably fitted in the dumbbell housing, such that when the slide rods slide toward or away from the dumbbell body, the adjustment blocks slide toward or away from the dumbbell body; a central rod rotatably mounted on the dumbbell housing; The new adjustable dumbbell as claimed in claim 2, further comprising one or two threaded rods, each of which is fixedly connected to the central rod and rotates with the rotation of the central rod, and which are threadedly inserted into each of the sliding rods.

5. The new adjustable dumbbell of claim 4, characterized in that the number of the adjusting blocks corresponds to the number of the sliding rods, the fixing part has a fixed protruding block fixed thereto, the sliding rod has a fixing groove formed therein, and when the fixing part is fixedly connected to the sliding rod, the fixing protruding block is inserted into the fixing groove and locked and fitted.

6. The adjustment mechanism includes: a shift assembly including a shift wheel, the shift wheel being fixedly mounted to the dumbbell housing, the shift wheel having a plurality of shift holes formed therein, the shift holes being uniformly distributed circumferentially about an axis of the shift wheel; one or more shift balls slidably fitted on the central rod along the axial direction and lockingly fitted into any of the shift holes; a shift spring, the number of which corresponds to the number of the shift balls, one end of which is connected to the central rod and the other end of which is connected to the shift balls; 6. The new adjustable dumbbell according to claim 5, wherein when adjusting the weight of the new adjustable dumbbell, the shift ball is removed from one shift hole and inserted into the other shift hole.

7. a plurality of sets of scale holes are drilled through the dumbbell housing, the number of the scale holes corresponds to the number of the adjustment blocks, the scale holes include a plurality of scale portions, the number of the scale portions corresponds to the number of the weight plates; Each of the scales has a different weight adjustment scale engraved on one side thereof, The new adjustable dumbbell of claim 1, characterized in that a scale block is fixedly connected to each of the adjustment blocks, and when the scale block faces one of the scale sections, the adjustment scale on one side of the scale section facing the scale block represents the weight of the new adjustable dumbbell.

8. The adjustment mechanism includes: a lock assembly including a lock wheel, the lock wheel being coaxially fixed to the central rod, the lock wheel having a plurality of lock grooves formed therein, the lock grooves being uniformly distributed circumferentially around the axis of the lock wheel; The new adjustable dumbbell of claim 4, further comprising a lock block that is slidably fitted into the dumbbell housing along the vertical direction and has a lock protrusion block fixedly connected thereto, and when the lock assembly is locked, the lock protrusion block is inserted into one of the lock grooves and engaged therewith, thereby fixing the central rod to the dumbbell housing.

9. A dumbbell set comprising an adjustable dumbbell and a dumbbell base for accommodating the adjustable dumbbell, wherein the adjustable dumbbell is the adjustable dumbbell according to any one of claims 1 to 8, and the dumbbell base has an accommodating groove for accommodating the adjustable dumbbell.

10. The dumbbell set of claim 9, characterized in that an unlocking block is provided in the receiving groove for unlocking the locking assembly, and when the adjustable dumbbell is placed on the dumbbell base, the unlocking block abuts against the locking block, and by driving the locking block in a direction away from the locking wheel, the locking protrusion block disengages from the locking groove, thereby unlocking the locking assembly.

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