Weight training equipment

Abstract

The present invention discloses a weight training device, comprising a base unit, a magnetic unit, a weight unit and a handle unit. The handle unit includes a grip, two anti-rotation modules sleeved on the left and right ends of the grip, two weight adjustment modules, and two weight wheels rotatably mounted on the weight adjustment modules, each weight adjustment module having a plurality of embedded card components. Each anti-rotation module has a magnetic fastener that can be detachably inserted into the corresponding weight wheel, and when the mounting seat is set on the base unit, the magnetic fastener will be driven by the magnetic force of the magnetic element to detach from the weight wheel, so that the embedded card component can be driven to rotate to adjust the weight. The magnetic element of the present invention drives the magnetic fastener to operate through magnetic force, thereby avoiding wear and deformation due to long-term use.

Description

Technical Field

[0001] The present invention relates to a training device for promoting or strengthening muscles or joints of a human body, and in particular to a weight training device. Background Art

[0002] A conventional weight training device, as shown in Chinese patents 201922030686.X, 201921038007.7, etc., comprises a base, a plurality of counterweight blocks arranged on the base, a handle, two counterweight adjustment units respectively installed at the two ends of the handle, and two anti-rotation units. The base is provided with two spaced protrusions. Each counterweight adjustment unit has a plurality of embedded card components corresponding to respective counterweight blocks. The anti-rotation units are respectively arranged at the two ends of the handle and are respectively located at two opposite sides of the counterweight adjustment unit.

[0003] The handle can be driven to rotate and drive each locking assembly to be inserted into or out of the corresponding counterweight block, so that the user can adjust the number of locked counterweight blocks according to needs. The anti-rotation unit can prevent the handle from being driven to drive the locking assembly when the weight training device is not placed on the base. When the anti-rotation unit is placed on the base, the anti-rotation unit will be driven by the protrusion to unlock, so that the user can drive the handle and drive the locking assembly. Therefore, the provision of the anti-rotation unit can prevent the counterweight block from falling due to the handle being accidentally actuated when the weight training device is in use.

[0004] However, since the anti-rotation unit is unlocked by engaging with the protrusion, it is easy to be worn or deformed after long-term use, so that the anti-rotation unit cannot work normally. Summary of the invention

[0005] Therefore, an object of the present invention is to provide a weight training device that can at least overcome the disadvantages of the prior art.

[0006] Therefore, the weight training device of the present invention comprises a base unit, a magnetic unit, a counterweight unit, and a handle unit. The magnetic unit comprises two magnetic components arranged on the base unit at intervals. The counterweight unit comprises two counterweight blocks arranged on the base unit at intervals, each counterweight block group having a plurality of counterweight blocks detachably arranged on the base unit.

[0007] The handle unit includes a handle extending left and right, two anti-rotation modules sleeved on the left and right ends of the handle and detachably arranged on the base unit to prevent rotation, two counterweight adjustment modules respectively mounted on the anti-rotation modules, and two counterweight wheels rotatably mounted on the counterweight adjustment modules. Each counterweight adjustment module has a plurality of locking components sleeved and fixed on the handle and corresponding to the counterweight blocks of the respective counterweight block groups.

[0008] The interlocking assembly and the corresponding weight wheel can be driven to rotate synchronously, so that each interlocking assembly can be engaged with or disengaged from the corresponding weight block. Each anti-rotation module has a mounting seat that is arranged downwardly on the base unit in a non-rotatable manner, and a magnetic fastener that is arranged on the mounting seat and is detachably inserted into the corresponding weight wheel, and when the mounting seat is arranged on the base unit, the magnetic fastener is driven by the magnetic force of the magnetic attraction member to be disengaged from the weight wheel.

[0009] Preferably, the handle extends left and right with its two ends respectively inserted into the counterweight adjustment module, and can be rotated to drive each engaging assembly of each counterweight adjustment module to engage or disengage the corresponding counterweight block, and coaxially drive the counterweight wheel to rotate.

[0010] Preferably, the handle has a gripping portion that is non-rotatably arranged between the anti-rotation modules, and two embedded portions that are rotatably inserted into the counterweight adjustment modules respectively. The handle unit also includes two driving turntables that are rotatably arranged on the counterweight adjustment modules and are respectively connected to the embedded portions. Each embedded portion can be driven by the corresponding driving turntable to drive the engaging assembly to engage or disengage the corresponding counterweight block, and coaxially drive the corresponding counterweight wheel to rotate.

[0011] Preferably, each of the weight wheels has a plurality of insertion holes spaced apart along its outer circumference for the magnetic fastener to be inserted upward.

[0012] Preferably, each of the anti-rotation modules further comprises a first elastic member disposed between the mounting base and the magnetic fastener, and the first elastic member constantly provides an elastic force for the magnetic fastener to be inserted upward into one of the insertion holes.

[0013] Preferably, the base unit also includes two safety buckles arranged at intervals on the left and right sides of the base unit, each mounting seat has a shell provided with a left and right lateral through-hole, and a buckle assembly installed on the shell and abutting against the corresponding counterweight wheel, the buckle assembly can be driven by the rotation of the counterweight wheel to change between a locked state in which it protrudes out of the through-hole and buckles the corresponding safety buckle, and an unlocked state in which it retracts into the through-hole and disengages from the corresponding safety buckle.

[0014] Preferably, each of the buckle components has a fixing member fixedly arranged on the corresponding shell, a buckle member slidably installed between the fixing member and the shell, and a second elastic member connected between the shell and the buckle member. The fixing member has a left and right lateral opening for the buckle member to be exposed so as to abut against the corresponding counterweight wheel. The buckle member can be driven by the counterweight wheel to rotate and change between a locked state in which it passes through the corresponding through-hole and is buckled in the corresponding safety buckle, and an unlocked state in which it is retracted into the through-hole and detached from the safety buckle. The second elastic member constantly provides the buckle member with an elastic restoring force to retract into the corresponding through-hole.

[0015] Preferably, each of the counterweight wheels has an end face facing the corresponding buckle assembly, the end face has a plurality of concave portions radially penetrating the end face and spaced around its axis, and a plurality of convex portions respectively between two adjacent concave portions. Each counterweight wheel can be driven by the handle so that the convex portion or the concave portion alternately abuts against the corresponding buckle component in the left and right directions.

[0016] Preferably, each of the safety buckles has a protruding portion protruding upward from the base unit, and a stopping portion extending laterally outward from the protruding portion, and the buckles can be driven to protrude out of the through holes and abut upward against the stopping portion.

[0017] Preferably, the base unit includes two base bodies disposed at intervals, and the magnetic attraction component, the counterweight block set, and the safety buckle are respectively disposed on the base bodies.

[0018] The effect of the present invention is that: by setting the magnetic fastener and the magnetic attraction member, when the anti-rotation module is placed on the base unit, the magnetic fastener can be unlocked by the magnetic force of the magnetic attraction member to drive the card assembly to rotate. Since the magnetic attraction member drives the magnetic fastener to operate through non-contact force without physical contact, wear and deformation due to long-term use can be avoided, thereby reducing the loss and maintenance cost of the weight training device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the accompanying drawings, in which:

[0020] Figure 1 is a perspective view of a first embodiment of a weight training device of the present invention;

[0021] Figure 2 is a perspective exploded view of the first embodiment;

[0022] Figure 3 is an exploded perspective view of a handle unit of the first embodiment;

[0023] Figure 4 is a side cross-sectional view of one of the first embodiments, illustrating that the buckle assembly is in a locked state;

[0024] Figure 5 is a fragmentary side cross-sectional view of one of the first embodiments, illustrating that the buckle assembly is in an unlocked state;

[0025] Figure 6 is an incomplete side cross-sectional view of the first embodiment, illustrating a magnetic fastener being inserted into one of the corresponding holes of the turntable;

[0026] Figure 7is a perspective view of a second embodiment of the weight training device of the present invention;

[0027] Figure 8 is an exploded perspective view of the second embodiment; and

[0028] Fig. 9 is a fragmentary side cross-sectional view of the second embodiment;

[0029] Reference numerals

[0030] 1: Weight training device

[0031] 2: Base unit

[0032] 21: Base body

[0033] 23: Safety buckle

[0034] 231: Projection

[0035] 232: Stopper

[0036] 3: Counterweight unit

[0037] 31: Counterweight set

[0038] 311: Counterweight

[0039] 4: Handle unit

[0040] 401: Perforation

[0041] 402: Opening

[0042] 41: Handle

[0043] 411: Grip

[0044] 412: Embedded

[0045] 413: Drive turntable

[0046] 42: Counterweight wheel

[0047] 420: Jack

[0048] 421: Outer surface

[0049] 422: End face

[0050] 423: concave face

[0051] 424: Convex face

[0052] 425: Weight label

[0053] 43: Counterweight adjustment module

[0054] 431: Embedded card assembly

[0055] 44: Anti-rotation module

[0056] 45: Mounting seat

[0057] 46: Magnetic fasteners

[0058] 47: First elastic member

[0059] 48: Shell

[0060] 49: Buckle assembly

[0061] 491: Fixings

[0062] 492: Clip

[0063] 493: Second elastic member

[0064] 494: Reaching

[0065] 49: Card insertion

[0066] 5: Magnetic unit

[0067] 51: Magnetic parts. DETAILED DESCRIPTION

[0068] See also Figure 1~2 The first embodiment of the weight training device 1 of the present invention comprises a base unit 2, a magnetic unit 5, a weight unit 3, and a handle unit 4.

[0069] The magnetic unit 5 includes two magnetic members 51 disposed at intervals on the base unit 2, and two safety buckles 23 disposed at intervals on the left and right sides of the base unit 2. Each safety buckle 23 has a protruding portion 231 protruding upward from the base unit 2, and a stopper 232 extending laterally outward from the upper end of the protruding portion 231.

[0070] The counterweight unit 3 is arranged at intervals on the left and right sides of the base body 21. The counterweight unit 3 includes two counterweight block groups 31 arranged at intervals on the left and right sides of the base unit 2. Each counterweight block group 31 has a plurality of counterweight blocks 311 detachably arranged on the base unit 2. Each counterweight block 311 is provided with two front-to-back embedded holes (not shown in the figure).

[0071] See also Figures 3-5 The handle unit 4 includes a grip 41 extending left and right, two anti-rotation modules 44 sleeved on the left and right ends of the grip 41 and detachably arranged on the base unit 2 so as to be non-rotatable, two counterweight adjustment modules 43 respectively mounted on the anti-rotation modules 44, and two counterweight wheels 42 respectively rotatably mounted on the counterweight adjustment modules 43.

[0072] The handle 41 extends left and right with its two ends respectively inserted into the counterweight adjustment module 43 and the anti-rotation module 44, and can be rotated to drive each engaging component 431 of each counterweight adjustment module 43 to engage or disengage the corresponding engaging hole (not shown) of the counterweight block 311, and the rotation of the handle 41 will coaxially drive the counterweight wheel 42 to rotate. Since the way in which the engaging component 431 engages or disengages the counterweight block 311 is not the focus of the present invention, it will not be described in detail.

[0073] Each weight wheel 42 has an end face 422 facing the handle 41 and an outer peripheral face 421, and each weight wheel 42 is also provided with a plurality of insertion holes 420 recessed in the outer peripheral face 421 and spaced apart, a plurality of concave portions 423 radially penetrating the end face 422 and spaced apart around the axis thereof, and a plurality of convex portions 424 respectively between two adjacent concave portions 423. The positions of the insertion holes 420 and the concave portions 423 correspond to each other on the left and right. The outer peripheral face 421 of each weight wheel 42 is also provided with a plurality of weight labels 425.

[0074] Each anti-rotation module 44 has a mounting seat 45, a magnetic fastener 46 mounted on the mounting seat 45, and a first elastic member 47. Each mounting seat 45 is used to be arranged downward on the base body 21 so as not to rotate, and has a shell 48, and a buckle assembly 49 mounted on the shell 48 and abutting against the corresponding counterweight wheel 42. The shell 48 of each mounting seat 45 is covered on the corresponding counterweight adjustment module 43 in the left and right directions, and the corresponding counterweight wheel 42 is hidden therein. Each shell 48 has a left and right lateral through hole 401. The user can observe the counterweight label 425 exposed in the shell 48 and drive the handle 41 to drive the counterweight wheel 42 to rotate, so as to control the locking assembly 431 to lock the counterweight block 311 corresponding to the counterweight label 425.

[0075] Each buckle assembly 49 has a fixing member 491, a buckle member 492, and a second elastic member 493. Each fixing member 491 is fixedly disposed on a side of the corresponding housing 48 facing the corresponding counterweight wheel 42, and has an opening 402 facing the counterweight wheel 42. Each buckle member 492 is installed between the fixing member 491 and the housing 48 so as to be slidable left and right, and has a supporting portion 494 that passes through the opening 402 of the fixing member 491 and is supported against the end surface 422 of the counterweight wheel 42, and a plug-in portion 495 connected to the lower end of the supporting portion 494 and opposite to the through hole 401 of the housing 48. Each second elastic member 493 is disposed between the corresponding buckle member 492 and the corresponding housing 48, and constantly provides the buckle member 492 with an elastic restoring force that causes the plug-in portion 495 to retract into the corresponding through hole 401.

[0076] Each buckle assembly 49 can be driven by the rotation of the corresponding counterweight wheel 42 to change between a locked state and an unlocked state. In the locked state, the counterweight wheel 42 uses one of its convex portions 424 to push against the abutting portion 494 of the corresponding latch 492 and compress the corresponding second elastic member 493, so that the insertion portion 495 can pass through the corresponding through hole 401 and be latched in the corresponding safety buckle 23. Since the insertion portion 495 is laterally abutted against the protruding portion 231 of the safety buckle 23 and is vertically limited by the stopping portion 232 above, the handle unit 4 cannot be lifted up. In the unlocked state, the counterweight wheel 42 uses one of its concave portions 423 to face the corresponding latch 492, and under the elastic restoring force of the second elastic member 493, the insertion portion 495 of the latch 492 will be separated from the safety buckle 23 and retracted into the through hole 401, so that the handle unit 4 can be lifted up.

[0077] The magnetic fastener 46 of each anti-rotation module 44 is pivotally mounted on the fixing member 491 and can be detachably inserted upward into one of the insertion holes 420 of the corresponding counterweight wheel 42. When the anti-rotation module 44 is mounted on the base unit 2, the magnetic fastener 46 is driven by the magnetic force of the magnetic attraction member 51 to pivot downward and detach from the insertion hole 420. Each first elastic member 47 is installed between the corresponding magnetic fastener 46 and the corresponding fixing member 491, and constantly provides the magnetic fastener 46 with an elastic force to insert upward into one of the insertion holes 420 of the corresponding counterweight wheel 42.

[0078] When adjusting the weight of the weight training device 1 using the first embodiment, the handle unit 4 is first placed on the base unit 2 so that the anti-rotation modules 44 can respectively lean downward against the magnetic element 51. Driven by the magnetic force of the magnetic element 51, the magnetic fasteners 46 in the anti-rotation modules 44 will move downward and disengage from the insertion holes 420. Therefore, the user can rotate the handle 41 and drive the weight wheel 42 to rotate relative to the anti-rotation module 44, so as to drive each engaging assembly 431 to engage with the corresponding weight block 311 and adjust to the predetermined weight.

[0079] The user can determine whether the handle 41 has been rotated to the correct position by observing the exposed weight label 425. When the handle 41 is driven to the correct position, each weight wheel 42 will drive the corresponding buckle assembly 49 to change to the unlocked state with one of the concave parts 423, so that the user can lift the handle unit 4 together with the weight block 311 embedded in the weight adjustment module 43. When the handle 41 is not driven to the correct position, each weight wheel 42 will drive the corresponding buckle assembly 49 to change to the locked state with one of the convex parts 424, so that the handle unit 4 cannot be lifted up.

[0080] See also Figure 6When the handle unit 4 is lifted up and separated from the base unit 2, each magnetic fastener 46 will also move away from the corresponding magnetic attraction component 51 and be inserted upward into one of the insertion holes 420 of the corresponding counterweight wheel 42 under the elastic force of the corresponding first elastic component 47, so that the user cannot drive the handle 41 to rotate relative to the anti-rotation module 44, thereby preventing the handle 41 from being accidentally rotated during use and causing the embedding component 431 to disengage from the embedding hole of the corresponding counterweight block 311, causing the counterweight block 311 to fall accidentally.

[0081] See also Figures 7-9 The second embodiment of the weight training device 1 of the present invention is different from the first embodiment in that the structural design of the base unit 2 and the handle unit 4, and the method of driving the embedded card assembly 431 to adjust the weight, and only the differences are described below.

[0082] The base unit 2 includes two base bodies 21 that are spaced apart from each other, and the magnetic attraction member 51, the counterweight block group 31, and the safety buckle 23 are all respectively disposed on the base body 21. The handle 41 has a gripping portion 411 that is non-rotatably disposed between the anti-rotation modules 44, and two embedding portions 412 that are rotatably inserted into the counterweight adjustment modules 43. The handle unit 4 also includes two driving turntables 413 that are rotatably disposed on the counterweight adjustment modules 43 and are respectively connected to the embedding portions 412. Each embedding portion 412 can be driven by the corresponding driving turntable 413 to drive the embedding assembly 431 to engage or disengage the corresponding counterweight block 311, and coaxially drive the corresponding counterweight wheel 42 to rotate.

[0083] When adjusting the weight of the weight training device 1 according to the second embodiment, the handle unit 4 is first placed on the base unit 2, so that the anti-rotation module 44 can respectively lean against the magnetic member 51 disposed on the base body 21, and driven by the magnetic force of the magnetic member 51, the magnetic fastener 46 in the anti-rotation module 44 will move downward and respectively disengage from the insertion hole 420. The user can respectively drive the driving dial 413 to drive the embedded portion 412 and the weight wheel 42 to rotate relative to the anti-rotation module 44, so as to drive each engaging assembly 431 to engage with the corresponding weight block 311 and adjust to the predetermined weight.

[0084] In summary, by configuring the magnetic fastener 46 and the magnetic attraction member 51, it is possible to control whether the embedded card assembly 431 can be driven to rotate, so as to avoid the accident of the counterweight 311 falling during use. Since the magnetic attraction member 51 drives the magnetic fastener 46 to operate through non-contact force without physical contact, the phenomenon of wear and deformation due to long-term use can be reduced. On the other hand, in combination with the configuration of the buckle assembly 49, it can also have an error-proofing mechanism to prevent the handle unit 4 from being lifted when the embedded card assembly 431 is not driven to the correct position. Therefore, the present invention is a weight training device 1 that can improve the safety of use and reduce the wear of parts and maintenance costs.

[0085] However, what is described above is only an embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. All simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the patent specification are still within the scope covered by the patent of the present invention.

Claims

1. A weight training device, characterized in that: Include: a base unit; A magnetic unit, comprising two magnetic elements spaced apart from each other on the base unit; A counterweight unit, comprising two counterweight blocks arranged at intervals on the left and right of the base unit, each counterweight block group having a plurality of counterweight blocks detachably arranged on the base unit; and A handle unit, comprising a grip extending left and right, two anti-rotation modules sleeved on the left and right ends of the grip and used to be non-rotatably and detachably arranged on the base unit, two counterweight adjustment modules respectively mounted on the anti-rotation modules, and two counterweight wheels rotatably mounted on the counterweight adjustment modules, each counterweight adjustment module having a plurality of locking components sleeved and fixed on the grip and corresponding to the counterweight blocks of the respective counterweight block groups, the locking components and the corresponding counterweight wheels can be driven to rotate synchronously, so that each locking component can be engaged with or disengaged from the corresponding counterweight block, each anti-rotation module having a mounting seat used to be non-rotatably arranged downward on the base unit, and a magnetic fastener arranged on the mounting seat and used to be detachably inserted into the corresponding counterweight wheel, and when the mounting seat is arranged on the base unit, the magnetic fastener is respectively driven by the magnetic force of the magnetic attraction component to be respectively disengaged from the counterweight wheel; The handle extends left and right, and its two ends are respectively inserted into the counterweight adjustment module, and can be rotated to drive each locking assembly of each counterweight adjustment module to engage or disengage the corresponding counterweight block, and coaxially drive the counterweight wheel to rotate. The handle has a gripping portion that is non-rotatably arranged between the anti-rotation modules; The base unit further comprises two safety buckles arranged at intervals on the left and right sides of the base unit, each mounting seat comprises a shell with a through hole in the left and right sides, and a buckle assembly mounted on the shell and abutting against the corresponding counterweight wheel, the buckle assembly can be driven by the rotation of the counterweight wheel to change between a locked state in which it protrudes out of the through hole and buckles the corresponding safety buckle, and an unlocked state in which it retracts into the through hole and detaches from the corresponding safety buckle; Each of the buckle components has a fixing part fixedly arranged on the corresponding shell, a buckle part slidably installed between the fixing part and the shell, and a second elastic part connected between the shell and the buckle part. The fixing part has a left and right lateral opening for the buckle part to be exposed and abut against the corresponding counterweight wheel. The buckle part can be driven by the counterweight wheel to rotate and change between a locked state in which it passes through the corresponding through-hole and is buckled in the corresponding safety buckle, and an unlocked state in which it is retracted into the through-hole and detached from the safety buckle. The second elastic part constantly provides the buckle part with an elastic restoring force to retract into the corresponding through-hole.

2. The weight training device according to claim 1, characterized in that The handle also has two embedded parts that are rotatably inserted into the weight adjustment module respectively. The handle unit also includes two driving turntables that are rotatably arranged on the weight adjustment module and connected to the embedded parts respectively. Each embedded part can be driven by the corresponding driving turntable to drive the embedded assembly to engage or disengage the corresponding weight block, and coaxially drive the corresponding weight wheel to rotate.

3. The weight training device according to claim 1 or 2, characterized in that: Each of the weighted wheels has a plurality of insertion holes spaced apart along its outer circumference for the magnetic fastener to be inserted upward.

4. The weight training device according to claim 1 or 2, characterized in that: Each of the anti-rotation modules also has a first elastic member disposed between the mounting base and the magnetic fastener, and the first elastic member constantly provides the magnetic fastener with an elastic force to insert upward into one of the insertion holes.

5. The weight training device according to claim 1 or 2, characterized in that: Each of the counterweight wheels has an end face facing the corresponding buckle assembly, and the end face has a plurality of concave portions radially penetrating the end face and spaced around its axis, and a plurality of convex portions respectively between two adjacent concave portions. Each counterweight wheel can be driven by the handle to alternately abut against the corresponding buckle component with the convex portion or the concave portion in the left and right directions.

6. The weight training device according to claim 5, characterized in that Each of the safety buckles has a protruding portion protruding upward from the base unit and a stopping portion extending laterally outward from the protruding portion. The buckle components can be driven to protrude out of the through hole and lean upward against the stopping portion.

7. The weight training device according to claim 6, characterized in that The base unit includes two base bodies which are spaced apart from each other. The magnetic attraction member, the weight block set, and the safety buckle are respectively arranged on the base bodies.

8. A weight training device, characterized in that: Include: a base unit; A magnetic unit, comprising two magnetic elements spaced apart from each other on the base unit; A counterweight unit, comprising two counterweight blocks arranged at intervals on the left and right of the base unit, each counterweight block group having a plurality of counterweight blocks detachably arranged on the base unit; and A handle unit, comprising a grip extending left and right, two anti-rotation modules sleeved on the left and right ends of the grip and detachably arranged on the base unit to prevent rotation; two counterweight adjustment modules respectively mounted on the anti-rotation modules, and two counterweight wheels respectively rotatably mounted on the counterweight adjustment modules; Each anti-rotation module also has a magnetic fastener that can be moved and extended into the counterweight wheel, and when the counterweight unit is set on the base unit, the magnetic fastener is driven by the magnetic force of the magnetic attraction member to separate from the counterweight wheel respectively; Each anti-rotation module has a mounting seat for being mounted downwardly on the base unit in a non-rotatable manner, the mounting seat is provided with the magnetic fastener, and a first elastic member is provided between the mounting seat and the magnetic fastener, the first elastic member constantly provides an elastic force for the magnetic fastener to be inserted upwardly into one of the insertion holes; The base unit further comprises two safety buckles arranged at intervals on the left and right sides of the base unit, each mounting seat comprises a shell with a through hole on the left and right sides, and a buckle assembly mounted on the shell and abutting against the corresponding counterweight wheel, the buckle assembly can be driven by the rotation of the counterweight wheel to change between a locked state in which it protrudes out of the through hole and buckles the corresponding safety buckle, and an unlocked state in which it retracts into the through hole and is separated from the corresponding safety buckle; Each of the buckle components has a fixing part fixedly arranged on the corresponding shell, a buckle part slidably installed between the fixing part and the shell, and a second elastic part connected between the shell and the buckle part. The fixing part has a left and right lateral opening for the buckle part to be exposed to abut against the corresponding counterweight wheel. The buckle part can be driven by the counterweight wheel to rotate and change between the locked state of passing through the corresponding through-hole and buckled in the corresponding safety buckle, and the unlocked state of retracting into the through-hole and disengaging from the safety buckle. The second elastic part constantly provides the buckle part with an elastic restoring force to retract into the corresponding through-hole. Each of the counterweight wheels has a plurality of insertion holes spaced apart along its outer circumference and for the magnetic fastener to be inserted upward.

9. The weight training device according to claim 8, characterized in that Each counterweight adjustment module has a plurality of locking components which are sleeved and fixed on the handle and correspond to the counterweight blocks of the respective counterweight block groups. The locking components and the corresponding counterweight wheels can be driven synchronously, so that each locking component can be engaged with or disengaged from the corresponding counterweight block.

10. The weight training device according to claim 9, characterized in that The handle extends left and right, and its two ends are respectively inserted into the counterweight adjustment module, and can be rotated to drive each engaging assembly of each counterweight adjustment module to engage or disengage the corresponding counterweight block, and coaxially drive the counterweight wheel to rotate.

11. The weight training device according to claim 10, wherein: The handle has a gripping portion that is non-rotatably arranged between the anti-rotation modules, and two embedded portions that are rotatably inserted into the counterweight adjustment modules. The handle unit also includes two driving turntables that are rotatably arranged on the counterweight adjustment modules and are respectively connected to the embedded portions. Each embedded portion can be driven by the corresponding driving turntable to drive the engaging assembly to engage or disengage the corresponding counterweight block, and coaxially drive the corresponding counterweight wheel to rotate.

12. The weight training device of claim 8, wherein: Each of the counterweight wheels has an end face facing the corresponding buckle assembly, and the end face has a plurality of concave portions radially penetrating the end face and spaced around its axis, and a plurality of convex portions respectively between two adjacent concave portions. Each counterweight wheel can be driven by the handle to alternately abut against the corresponding buckle component with the convex portion or the concave portion in the left and right directions.

13. The weight training device according to claim 12, wherein: Each of the safety buckles has a protruding portion protruding upward from the base unit and a stopping portion extending laterally outward from the protruding portion. The buckle components can be driven to protrude out of the through hole and lean upward against the stopping portion.

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