Weight-adjustable dumbbell

Abstract

A weight-adjustable dumbbell comprises a dumbbell frame, a plurality of hanging piece assemblies and dumbbell pieces matched with the hanging piece assemblies, the middle of the dumbbell frame is sleeved with a rotating rod, and the hanging piece assemblies are symmetrically arranged at the two ends of the dumbbell frame. The hanging piece assemblies located on the same side of the dumbbell frame are arranged at intervals and connected in a linkage mode, the hanging piece assembly close to the middle of the dumbbell frame is connected with the rotating rod in a linkage mode, each hanging piece assembly comprises a gear shaft and a limiting structure, clamping blocks are arranged at the two ends of the rotating rod, a clamping groove is formed in one side of each gear shaft, and the limiting structures are arranged in the clamping grooves. The clamping block is matched with the clamping groove to achieve linkage of the rotating rod and the gear shaft, and the limiting structure is matched with the gear shaft to be used for limiting movement of the dumbbell pieces.

Description

Technical Field

[0001] The invention belongs to the technical field of fitness equipment, and in particular relates to a dumbbell with adjustable weight. Background Art

[0002] Dumbbells are a common piece of fitness equipment used to build muscle strength and endurance. They typically consist of a pair of handheld weights, each with a metal sphere at either end, connected by a short rod. Dumbbells can be used for a variety of exercises, including but not limited to weightlifting, curls, presses, squats, and more. Choosing the right weight for your workout depends on your training goals and fitness level.

[0003] Currently, there are both fixed-weight dumbbells and adjustable-weight dumbbells on the market. Fixed-weight dumbbells require multiple sets to meet the varying needs of fitness enthusiasts, which is both expensive and space-consuming. Adjustable-weight dumbbells, on the other hand, typically consist of a central shaft, multiple dumbbell plates connected in series at both ends of the shaft, and locking nuts threaded onto the shaft. Specifically, the weight of the dumbbell is adjusted by adding or removing dumbbell plates, rotating the locking nut to adjust its position on the shaft, and tightening the plates.

[0004] When the dumbbell weight needs to be changed, the locking nut needs to be removed first, the dumbbell plates need to be installed, and then the locking nut needs to be tightened. The installation process is cumbersome and time-consuming. There is an urgent need to provide a weight-adjustable dumbbell that can quickly replace the dumbbell plates. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a dumbbell with adjustable weight, which can quickly replace dumbbell plates and save the user's adjustment time.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] A dumbbell with adjustable weight, comprising a dumbbell frame, a plurality of hanging plate assemblies and dumbbell plates cooperating with the hanging plate assemblies, a rotating rod being sleeved on the middle portion of the dumbbell frame, a plurality of the hanging plate assemblies being symmetrically arranged at both ends of the dumbbell frame, a plurality of the hanging plate assemblies located on the same side of the dumbbell frame being spaced apart and interconnected, the hanging plate assembly close to the middle portion of the dumbbell frame being interconnected with the rotating rod, the hanging plate assembly comprising a gear shaft and a limiting structure, blocks being provided at both ends of the rotating rod, a slot being provided on one side of the gear shaft, the block cooperating with the slot to realize the linkage between the rotating rod and the gear shaft, and the limiting structure cooperating with the gear shaft to limit the movement of the dumbbell plates.

[0008] Furthermore, the limiting structure includes a driven gear, a first shell and a second shell, and the first shell and the second shell are connected to form an inner cavity, the gear shaft and the driven gear are arranged in the inner cavity, and the driven gear is meshed with the gear shaft, and the limiting structure includes a protrusion block and a plug-in slot, the protrusion block is arranged on the inner side surface of the first shell, and the plug-in slot is arranged on the side of the driven gear facing the first shell, and the driven gear can be rotated relative to the first shell so that the plug-in slot and the protrusion block are plugged in or separated, and a limiting column is provided on the side of the driven gear close to the second shell, and an elastic member is sleeved on the outer periphery of the limiting column, and a second through hole for the limiting column to pass through is provided on the second shell, and a limiting hole adapted to the limiting column is provided on the dumbbell plate.

[0009] Furthermore, the inserting groove is provided with a first guiding inclined surface, and the protruding block is provided with a second guiding inclined surface matching the first guiding inclined surface.

[0010] Furthermore, a first through hole is provided in the middle of the dumbbell plate and a notch is provided on one side thereof, the notch is connected to the first through hole, and slide grooves are provided on both sides of the notch. The hanging plate assembly is arranged in the slide groove and can slide along the notch to the outside of the dumbbell plate.

[0011] Furthermore, the dumbbell frame includes a fixing frame and a central axis, the fixing frame includes a front baffle, a rear baffle and a connecting plate, the hanging plate assembly is sleeved outside the central axis and is arranged between the front baffle and the rear baffle, the rear baffle is fixedly connected to the central axis, and the two ends of the connecting plate are respectively connected to the front baffle and the rear baffle.

[0012] Furthermore, an identification block is provided at one end of the connecting plate close to the front baffle, a fixing hole adapted to the identification block is provided on the front baffle, and the identification block is inserted into the fixing hole.

[0013] Furthermore, the dumbbell frame also includes a gear assembly, which is sleeved on both ends of the rotating rod and forms a linkage connection with the rotating rod. A positioning groove is provided on the side of the front baffle close to the gear assembly, and a first spring and a positioning bead are provided in the positioning groove. A plurality of positioning holes are circumferentially spaced apart on the side of the gear assembly close to the front baffle, and the positioning beads can pass through the positioning holes.

[0014] Furthermore, the dumbbell also includes a base, a locking groove is provided at the bottom of the front baffle, a locking block is provided in the locking groove, the locking block is connected to the top of the locking groove by a second spring, an avoidance groove is provided in the middle of the locking block, the gear assembly is provided with a plurality of fixed blocks circumferentially spaced apart on one side of the front baffle, and a protruding structure is provided on the base to cooperate with the locking block.

[0015] Furthermore, the side of the shift assembly away from the front baffle is evenly divided into a plurality of scale plates, the number of the positioning holes is the same as the number of the scale plates, and the number of the fixing blocks is the same as the number of the scale plates.

[0016] Furthermore, an anti-skid cover is provided on the outer periphery of the rotating rod, and an anti-skid pattern is provided on the outer periphery of the anti-skid cover.

[0017] The beneficial effects of the present invention are:

[0018] The present invention provides a dumbbell with adjustable weight. The dumbbell plates are restricted by setting a hanging plate assembly. The user only needs to rotate the rotating rod to quickly replace the dumbbell plates, thereby saving the time spent by the user on adjusting the dumbbell weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall assembly of the present invention;

[0020] Figure 2 Schematic diagram of the dumbbell plate of the present invention;

[0021] Figure 3 This is a schematic diagram of the dumbbell plate of the present invention from another angle;

[0022] Figure 4 is a schematic diagram of the dumbbell frame of the present invention;

[0023] Figure 5 is an exploded view of the hanging plate assembly of the present invention;

[0024] Figure 6 This is an exploded view of the hanging plate assembly from another angle in the present invention.

[0025] Figure 7 It is a schematic diagram of the rotating rod in the present invention;

[0026] Figure 8 It is an exploded view of four sets of hanging plate assemblies and four sets of dumbbell plates in the present invention;

[0027] Figure 9 This is a schematic diagram of the structure of the driven gears in the four sets of hanging plate assemblies in the present invention;

[0028] Figure 10 It is a partial exploded view of the dumbbell frame of the present invention;

[0029] Figure 11 is a schematic diagram of the front baffle and the gear assembly in the present invention;

[0030] Figure 12 is a schematic diagram of the mid-gear assembly of the present invention;

[0031] Figure 13is a schematic diagram of the base in the present invention;

[0032] Figure 14 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 15 It is along Figure 14 Sectional view of AA in the middle;

[0034] Description of reference numerals:

[0035] 1. Base; 11. Protruding structure; 12. Fixing groove; 13. Positioning protrusion;

[0036] 2. Center axis; 21. Rotating rod; 211. Anti-slip sleeve; 212. Clamping block;

[0037] 3. Dumbbell plate; 31. First through hole; 32. Notch; 33. Slide; 34. Limiting hole; 35. Groove; 36. First dumbbell plate; 37. Second dumbbell plate; 38. Third dumbbell plate; 39. Fourth dumbbell plate;

[0038] 4. Hanging plate assembly; 41. Gear shaft; 411. Slot; 42. Driven gear; 421. Limiting column; 422. Elastic member; 423. Insertion slot; 43. First housing; 431. Protrusion; 44. Second housing; 441. Second through hole; 45. First hanging plate assembly; 451. First driven gear; 452. First insertion slot; 46. Second hanging plate assembly; 461. Second driven gear; 462. Second insertion slot; 47. Third hanging plate assembly; 471. Third driven gear; 472. Third insertion slot; 48. Fourth hanging plate assembly; 481. Fourth driven gear; 482. Fourth insertion slot;

[0039] 5. Fixing frame; 51. Front baffle; 511. Fixing hole; 512. Positioning slot; 513. First spring; 514. Positioning bead; 515. Locking slot; 516. Locking block; 517. Avoidance slot; 518. Second spring; 52. Rear baffle; 53. Connecting plate; 531. Identification block;

[0040] 6. Gear assembly; 61. Positioning hole; 62. Scale plate; 63. Fixing block. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the invention can be combined interactively without conflicting with each other.

[0042] The present invention provides a dumbbell with adjustable weight. The dumbbell plates are restricted by setting a hanging plate assembly. The user only needs to rotate the rotating rod to quickly replace the dumbbell plates, thereby saving the time spent by the user on adjusting the dumbbell weight.

[0043] Reference Figures 1 to 11 This embodiment provides a dumbbell with adjustable weight. The dumbbell includes a dumbbell frame, a base 1, dumbbell plates 3, and a hanging plate assembly 4. The dumbbell plates 3 cooperate with the hanging plate assembly 4. A rotating rod 21 is sleeved in the middle of the dumbbell frame. The hanging plate assembly 4 comprises multiple groups. The multiple groups of hanging plate assemblies 4 are spaced apart and interconnected. The multiple groups of hanging plate assemblies 4 are symmetrically arranged at both ends of the dumbbell frame. The hanging plate assemblies 4 near the middle of the dumbbell frame are interconnected with the rotating rod 21. The base 1 is provided with the same number of dumbbell plates 3 as the number of hanging plate assemblies 4.

[0044] A first through hole 31 is provided in the middle of the dumbbell plate 3 and a notch 32 is provided on the top thereof. The notch 32 is connected to the first through hole 31. Slide grooves 33 are provided on both sides of the notch 32. The hanging plate assembly 4 is arranged in the slide grooves 33 and can slide along the notch 32 to the outside of the dumbbell plate 3. The hanging plate assembly 4 is provided with a limiting structure for limiting the movement of the dumbbell plate 3.

[0045] Reference Figures 1 to 5 The hanging plate assembly 4 includes a gear shaft 41, one side of which is provided with a slot 411. The rotating rod 21 is provided with a clamping block 212 at both ends. The clamping block 212 cooperates with the clamping slot 411 to achieve linkage between the rotating rod 21 and the gear shaft 41. The gear shafts 41 between two adjacent hanging plate assemblies 4 are also linked by the clamping block 212 cooperating with the clamping slot 411.

[0046] Furthermore, the hanging plate assembly 4 also includes a driven gear 42, a first shell 43 and a second shell 44. The first shell 43 and the second shell 44 are connected to form an inner cavity. The gear shaft 41 and the driven gear are arranged in the inner cavity. The driven gear is engaged with the gear shaft 41.

[0047] In this embodiment, the limiting structure cooperates with the gear shaft 41 to limit the movement of the dumbbell plate 3. The limiting structure includes a protrusion 431 and a plug-in slot 423. The protrusion 431 is provided on the inner side of the first housing 43, and the plug-in slot 423 is provided on the side of the driven gear 42 facing the first housing 43. The driven gear 42 can rotate relative to the first housing 43, and the slot is connected to or separated from the protrusion 431. A limiting post 421 is provided on the side of the driven gear close to the second housing 44. An elastic member 422 is sleeved on the outer periphery of the limiting post 421. The second housing 44 is provided with a second through hole 441 for the limiting post 421 to pass through. The dumbbell plate 3 is provided with a limiting hole 34 adapted to the limiting post 421.

[0048] It should be noted that in the initial state, the protrusion 431 is inserted into the insertion groove 423. When the user grasps and lifts the rotating rod 21, the hanging plate assembly 4 moves along with the rotating rod 21 and slides along the notch 32 to the outside of the dumbbell plate 3. The dumbbell plate 3 will remain on the base 1 and will not move with the rotating rod 21. When the user twists the rotating rod 21 to rotate it, the gear shaft 41 rotates synchronously, driving the driven gear 42 to rotate. The insertion groove 423 on the driven gear 42 and the protrusion 431 gradually separate. The protrusion 431 exerts a horizontal abutment force on the driven gear 42, causing the driven gear 42 to move away from the protrusion 431. The limiting post 421 will pass through the through hole and finally be inserted into the limiting hole 34. The elastic member 422 is compressed. When the user grasps and lifts the rotating rod 21, the hanging plate assembly 4 and the dumbbell plate 3 will move together with the rotating rod 21.

[0049] As can be seen, the user only needs to rotate the rotary rod 21 to adjust the dumbbell's weight, saving adjustment time. When the user needs to change the dumbbell's weight again, he or she holds the rotary rod 21 and rotates it, so that the protrusion 431 is inserted into the insertion groove 423. Under the resetting action of its elastic force, the elastic member 422 can form a horizontal abutment force on the limiting column 421, and the driven gear 42 will move toward the side close to the protrusion 431. The limiting column 421 is separated from the limiting hole 34, and the dumbbell plate 3 is no longer restricted by the hanging plate assembly 4. The user holds the rotary rod 21 and lifts it, and the dumbbell plate 3 will remain on the base 1.

[0050] Furthermore, the plug-in slot 423 is provided with a first guiding bevel, and the protruding block 431 is provided with a second guiding bevel that cooperates with the first guiding bevel. When the plug-in slot 423 and the protruding block 431 move relative to each other, the first guiding bevel and the second guiding bevel act as a guide, which is more conducive to the plug-in or separation of the plug-in slot 423 and the protruding block 431.

[0051] It should be noted that two protruding blocks 431 are provided on the inner side surface of the first shell 43, and two plug-in grooves 423 are provided on the driven gear 42. The two protruding blocks 431 respectively cooperate with the two plug-in grooves 423, and the two protruding blocks 431 are arranged opposite to each other. The two plug-in grooves 423 are arranged opposite to each other and are respectively provided on the inner ring and outer ring of the driven gear 42. When the driven gear rotates, the two protruding blocks 431 move synchronously with the positions of the two plug-in grooves 423 to achieve plugging or separation.

[0052] Reference Figures 6 and 7 In this embodiment, four groups of hanging plate assemblies 4 and four dumbbell plates 3 are used as examples for explanation. The four groups of hanging plate assemblies 4 are named as the first hanging plate assembly 45, the second hanging plate assembly 46, the third hanging plate assembly 47 and the fourth hanging plate assembly 48 in sequence from the middle to the end of the central axis 2. The four dumbbell plates 3 are named as the first dumbbell plate 36, the second dumbbell plate 37, the third dumbbell plate 38 and the fourth dumbbell plate 39 in sequence from the middle to the end of the central axis 2.

[0053] The first hanging plate assembly 45 is used to limit the movement of the first dumbbell plate 36, the second hanging plate assembly 46 is used to limit the movement of the second dumbbell plate 37, the third hanging plate assembly 47 is used to limit the movement of the third dumbbell plate 38, and the fourth dumbbell plate 39 is used to limit the movement of the fourth dumbbell plate 39.

[0054] In this embodiment, the first dumbbell piece 36, the second dumbbell piece 37 and the third dumbbell piece 38 have the same weight, and the fourth dumbbell piece 39 has a smaller weight. The four sets of the hanging piece assemblies 4 and the four dumbbell pieces 3 can be combined to form eight different weight levels.

[0055] Assume that in the initial state, the protruding blocks 431 in all the hanging plate assemblies 4 are arranged in the inserting slots 423, and the four sets of hanging plate assemblies 4 do not restrict the movement of the corresponding dumbbell plates 3, and are now in the first gear.

[0056] In this embodiment, the sizes of the protruding blocks 431 in the four groups of the hanging plate assemblies are all the same. The size of the fourth plug-in slot 482 on the fourth driven gear 481 in the fourth hanging plate assembly 48 is the same as the size of the protruding block 431. The size of the first plug-in slot 452 on the first driven gear 451 in the first hanging plate assembly 45 is twice the size of the protruding block 431. The size of the second plug-in slot 462 on the second driven gear 461 in the second hanging plate assembly 46 is four times the size of the protruding block 431. The size of the third plug-in slot 472 on the third driven gear 471 in the third hanging plate assembly 47 is six times the size of the protruding block 431.

[0057] Correspondingly, when the user rotates the rotary rod 21 once, the limiting column 421 on the fourth driven gear 481 in the fourth hanging plate assembly 48 can be inserted into the limiting hole 34 of the fourth dumbbell plate 39, thereby limiting the fourth dumbbell plate 39 on the dumbbell frame, which is now in the second gear position.

[0058] It should be noted that there are ten fourth insertion slots 482 in the fourth hanging plate assembly 48 , and the ten fourth insertion slots 482 are arranged at intervals. When the number of rotations is an odd number, the fourth dumbbell plate 39 will be retained on the dumbbell frame.

[0059] When the user rotates the rotary rod 21 twice, the fourth hanging plate assembly 48 no longer restricts the fourth dumbbell plate 39, and the limiting post 421 on the first driven gear 451 in the first hanging plate assembly 45 is inserted into the limiting hole 34 of the first dumbbell plate 36. The first dumbbell plate 36 is retained on the dumbbell frame and is now in the third gear.

[0060] The user rotates the rotating rod 21 three times, and the limiting post 421 on the fourth driven gear 481 in the fourth hanging plate assembly 48 is inserted into the limiting hole 34 of the fourth dumbbell plate 39. The limiting post 421 on the first driven gear 451 in the first hanging plate assembly 45 is inserted into the limiting hole 34 of the first dumbbell plate 36. The first dumbbell plate 36 and the fourth dumbbell plate 39 are both retained on the dumbbell frame and are now in the fourth gear.

[0061] The user rotates the rotating rod 21 four times, and the fourth hanging plate assembly 48 no longer restricts the movement of the fourth dumbbell plate 39. The limiting post 421 on the first driven gear 451 in the first hanging plate assembly 45 is inserted into the limiting hole 34 of the first dumbbell plate 36. The limiting post 421 on the second driven gear 461 in the second hanging plate assembly 46 is inserted into the limiting hole 34 of the second dumbbell plate 37. The first dumbbell plate 36 and the second dumbbell plate 37 are both retained on the dumbbell, and are now in the fifth gear.

[0062] The user rotates the rotating rod 21 five times, and the limiting post 421 on the fourth driven gear 481 in the fourth hanging plate assembly 48 is inserted into the limiting hole 34 of the fourth dumbbell plate 39. The limiting post 421 on the first driven gear 451 in the first hanging plate assembly 45 is inserted into the limiting hole 34 of the first dumbbell plate 36. The limiting post 421 on the second driven gear 461 in the second hanging plate assembly 46 is inserted into the limiting hole 34 of the second dumbbell plate 37. The first dumbbell plate 36, the second dumbbell plate 37 and the fourth dumbbell plate 39 are all retained on the dumbbell frame, and are now in the sixth gear.

[0063] The user rotates the rotating rod 21 six times, and the limiting post 421 on the first driven gear 451 in the first hanging plate assembly 45 is inserted into the limiting hole 34 of the first dumbbell plate 36. The limiting post 421 on the second driven gear 461 in the second hanging plate assembly 46 is inserted into the limiting hole 34 of the second dumbbell plate 37. The limiting post 421 on the third driven gear 471 in the third hanging plate assembly 47 is inserted into the limiting hole 34 of the third dumbbell plate 38. The first dumbbell plate 36, the second dumbbell plate 37 and the third dumbbell plate 38 are all retained on the dumbbell frame, and are now in the seventh gear.

[0064] The user rotates the rotating rod 21 seven times, and the limiting post 421 on the first driven gear 451 in the first hanging plate assembly 45 is inserted into the limiting hole 34 of the first dumbbell plate 36. The limiting post 421 on the second driven gear 461 in the second hanging plate assembly 46 is inserted into the limiting hole 34 of the second dumbbell plate 37. The limiting post 421 on the third driven gear 471 in the third hanging plate assembly 47 is inserted into the limiting hole 34 of the third dumbbell plate 38. The limiting post 421 on the fourth driven gear 481 in the fourth hanging plate assembly 48 is inserted into the limiting hole 34 of the fourth dumbbell plate 39. The first dumbbell plate 36, the second dumbbell plate 37, the third dumbbell plate 38 and the fourth dumbbell plate 39 are all retained on the dumbbell frame, and are now in the eighth gear position.

[0065] Reference Figures 8 to 10 In this embodiment, the dumbbell frame includes a fixing frame 5 and a central axis 2, the fixing frame 5 includes a front baffle 51, a rear baffle 52 and a connecting plate 53, the hanging plate assembly 4 is sleeved outside the central axis 2 and is arranged between the front baffle 51 and the rear baffle 52, the rear baffle 52 is fixedly connected to the central axis 2, and the two ends of the connecting plate 53 are respectively connected to the front baffle 51 and the rear baffle 52.

[0066] Furthermore, an identification block 531 is provided at one end of the connecting plate 53 close to the front baffle 51, and a fixing hole 511 adapted to the identification block 531 is provided on the front baffle 51. The identification block 531 is inserted into the fixing hole 511, and the rotation of the rotating rod 21 will not affect the fixing frame 5, and the position of the fixing frame 5 and the central axis 2 always remains unchanged.

[0067] In this embodiment, the dumbbell frame further includes a shift assembly 6, which is sleeved on both ends of the rotating rod 21 and forms a linkage connection with the rotating rod 21. When the user rotates the rotating rod 21, the shift assembly 6 rotates along with it. A positioning groove 512 is provided on the side of the front baffle 51 close to the shift assembly. A first spring 513 and a positioning bead 514 are disposed in the positioning groove 512. A plurality of positioning holes 61 are circumferentially spaced apart on the side of the shift assembly 6 close to the front baffle. When the shift assembly 6 rotates, the positioning bead 514 can pass through different positioning holes 61.

[0068] Furthermore, there are two groups of positioning grooves 512, and the two groups of positioning grooves 512 are arranged on both sides of the front baffle 51. Correspondingly, there are multiple positioning holes 61 on the gear assembly 6. Each time the gear assembly 6 is rotated, the two positioning beads 514 will pass through the two relatively arranged positioning holes 61.

[0069] Furthermore, the side of the shift assembly 6 away from the front baffle 51 is evenly divided into a plurality of scale plates 62 , and the number of the positioning holes 61 is the same as the number of the scale plates 62 .

[0070] In this embodiment, the side of the gear assembly 6 away from the front baffle 51 is divided into eight equally spaced scale plates 62. Each of these scale plates 62 is marked with numbers 1 through 8, with different numbers representing different gear positions. There are eight positioning holes 61, allowing the gear assembly 6 to accommodate up to eight weight levels. The gear assembly 6 can rotate eight times relative to the front baffle 51, and the indicator block 531 serves as a gear indicator. It is understood that the indicator block 531 indicates the number on the scale plate 62, making it easier for the user to determine the current gear position 62 of the dumbbell.

[0071] In another specific embodiment, the hanging plate assembly 4 can be provided with a maximum of five groups, and the dumbbell plates 3 can be provided with a maximum of five pieces. The five groups of the hanging plate assembly 4 and the dumbbell plates 3 can be combined to form ten combinations with different weights. The gear assembly 6 is evenly divided into ten dials for indicating ten gears.

[0072] When the dumbbell is in the first gear, the identification block 531 indicates 1 on the dial 62; when the dumbbell is in the second gear, the identification block 531 indicates 2 on the dial 62; and so on. The user can determine the current gear of the dumbbell by directly observing the gear assembly 6.

[0073] Reference Figure 11 In this embodiment, the base 1 is provided with a fixing groove 12 adapted to the number of the dumbbell pieces 3, and a positioning protrusion 13 is provided in the fixing groove 12. The bottom of the dumbbell piece 3 is provided with a groove 35 adapted to the positioning protrusion 13. The groove 35 cooperates with the positioning protrusion 13 so that the dumbbell piece 3 can be stably placed on the base 1.

[0074] Reference Figures 12 to 13 In this embodiment, a lock groove 515 is provided at the bottom of the front baffle 51, and a lock block 516 is provided in the lock groove 515. The lock block 516 is connected to the top of the lock groove 515 through a second spring 518. An avoidance groove 517 is provided in the middle of the lock block 516. The gear assembly 6 is provided with a plurality of fixed blocks 63 at circumferential intervals on one side facing the second limit plate, and a protruding structure 11 that cooperates with the lock block 516 is provided on the base 1.

[0075] Furthermore, the number of the fixing blocks 63 is the same as the number of the scale plates 62. In this embodiment, there are eight scale plates and eight fixing blocks 63.

[0076] It can be understood that when the front baffle 51 is placed on the base 1, the protruding structure 11 on the base 1 will cause the locking block 516 to move toward the direction close to the locking slot 515, compressing the second spring 518, and the fixed block 63 can pass along the plug-in slot 423, and is in a gear-adjustable state; when the front baffle 51 is separated from the base 1, the second spring 518 will drive the locking block 516 to move toward the direction away from the locking slot 515 under elastic reset, and the upper end of the locking block 516 will be inserted between two adjacent fixed blocks 63, and the gear assembly 6 cannot rotate, and is in a gear-unadjustable state.

[0077] Furthermore, in this embodiment, the outer periphery of the rotating rod 21 is provided with an anti-slip cover 211, and the outer periphery of the anti-slip cover 211 is provided with anti-slip lines. The anti-slip cover 211 can be made of rubber material, and the anti-slip lines are formed on the outer surface of the rubber material, which has the characteristics of anti-slip and durability.

[0078] It is understandable that those skilled in the art can, under the guidance of the above embodiments, combine various implementation methods in the above embodiments to obtain technical solutions of multiple implementation methods.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dumbbell with adjustable weight, characterized in that: The dumbbell includes a dumbbell frame, a plurality of hanging plate assemblies and dumbbell plates matched with the hanging plate assemblies. The middle part of the dumbbell frame is sleeved with a rotating rod. The plurality of hanging plate assemblies are symmetrically arranged at both ends of the dumbbell frame. The plurality of hanging plate assemblies on the same side of the dumbbell frame are spaced apart and linked to each other. The hanging plate assembly close to the middle of the dumbbell frame is linked to the rotating rod. The hanging plate assembly includes a gear shaft and a limiting structure. Blocks are provided at both ends of the rotating rod, and a slot is provided on one side of the gear shaft. The block cooperates with the slot to realize the linkage between the rotating rod and the gear shaft. The limiting structure cooperates with the gear shaft to limit the movement of the dumbbell plate.

2. The weight-adjustable dumbbell according to claim 1, wherein: The limiting structure includes a driven gear, a first shell and a second shell. The first shell and the second shell are connected to form an inner cavity. The gear shaft and the driven gear are arranged in the inner cavity. The driven gear is meshed with the gear shaft. The limiting structure includes a protrusion block and a plug-in slot. The protrusion block is arranged on the inner side surface of the first shell, and the plug-in slot is arranged on the side of the driven gear facing the first shell. The driven gear can rotate relative to the first shell so that the plug-in slot and the protrusion block are plugged in or separated. A limiting column is provided on the side of the driven gear close to the second shell, and an elastic member is sleeved on the outer periphery of the limiting column. A second through hole for the limiting column to pass through is provided on the second shell, and a limiting hole adapted to the limiting column is provided on the dumbbell plate.

3. The weight-adjustable dumbbell according to claim 2, characterized in that: The inserting groove is provided with a first guiding inclined surface, and the protruding block is provided with a second guiding inclined surface matching the first guiding inclined surface.

4. The weight-adjustable dumbbell according to claim 1, wherein: A first through hole is provided in the middle of the dumbbell plate and a notch is provided on one side thereof, the notch is communicated with the first through hole, and sliding grooves are provided on both sides of the notch. The hanging plate assembly is arranged in the sliding grooves and can slide along the notch to the outside of the dumbbell plate.

5. The weight-adjustable dumbbell according to claim 1, characterized in that: The dumbbell frame includes a fixing frame and a central axis, the fixing frame includes a front baffle, a rear baffle and a connecting plate, the hanging plate assembly is sleeved outside the central axis and is arranged between the front baffle and the rear baffle, the rear baffle is fixedly connected to the central axis, and the two ends of the connecting plate are respectively connected to the front baffle and the rear baffle.

6. The weight-adjustable dumbbell according to claim 5, characterized in that: An identification block is provided at one end of the connecting plate close to the front baffle, and a fixing hole adapted to the identification block is provided on the front baffle, and the identification block is inserted into the fixing hole.

7. The weight-adjustable dumbbell according to claim 5, characterized in that: The dumbbell frame also includes a gear assembly, which is sleeved on both ends of the rotating rod and forms a linkage connection with the rotating rod. A positioning groove is provided on the side of the front baffle close to the gear assembly, and a first spring and a positioning bead are provided in the positioning groove. A plurality of positioning holes are circumferentially spaced apart on the side of the gear assembly close to the front baffle, and the positioning beads can pass through the positioning holes.

8. The weight-adjustable dumbbell according to claim 7, characterized in that: The dumbbell also includes a base, a locking groove is provided at the bottom of the front baffle, a locking block is provided in the locking groove, the locking block is connected to the top of the locking groove by a second spring, an avoidance groove is provided in the middle of the locking block, the gear assembly is provided with a plurality of fixed blocks circumferentially spaced apart on one side of the front baffle, and a protruding structure that cooperates with the locking block is provided on the base.

9. The weight-adjustable dumbbell according to claim 8, characterized in that: The side of the shift assembly away from the front baffle is evenly divided into a plurality of scale plates, the number of the positioning holes is the same as the number of the scale plates, and the number of the fixing blocks is the same as the number of the scale plates.

10. The weight-adjustable dumbbell according to claim 1, characterized in that: An anti-skid cover is provided on the outer periphery of the rotating rod, and an anti-skid pattern is provided on the outer periphery of the anti-skid cover.

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