Weight-adjustable body builder

Abstract

The utility model relates to a weight-adjustable body builder which comprises a first weight unit and at least one second weight unit which are connected in a matched mode through clamping grooves and clamping pieces. Limiting grooves and elastic limiting pieces which are matched with each other are arranged on the contact faces between the first weight units and the second weight units and the contact faces between every two adjacent second weight units, and at least part of each elastic limiting piece can be embedded into the corresponding limiting groove. Due to the fact that the weight of the body builder is adjustable, the body builder can be suitable for different users, and the use requirements of different training stages are met; meanwhile, a plurality of body builders with different weights do not need to be purchased in order to adapt to the use requirements of different users at different training stages; moreover, the body builder is simple in structure and convenient to operate.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment technology, and in particular to a fitness machine with adjustable weight. Background Technology

[0002] In the context of today's global fitness craze, strength training, as a key element in improving physical fitness and sculpting a perfect physique, has been enthusiastically embraced by fitness enthusiasts. Kettlebell training, as a classic form of strength training, is ubiquitous in gyms and home workout settings due to its numerous advantages, such as simultaneously working multiple muscle groups, improving body coordination, and enhancing explosive power.

[0003] Traditional kettlebells are typically made of a single, cast iron, with a fixed weight. For beginners in fitness, an overly heavy, fixed-weight kettlebell can easily cause injuries and dampen their enthusiasm for training, as their muscle strength, joint endurance, and motor skills are still developing and they struggle to handle heavier loads. As their fitness level improves and their bodies adapt to the original kettlebell weight, they urgently need to increase their training load to continuously stimulate muscle growth and break through physical plateaus. However, at this point, the fixed-weight kettlebell cannot meet their advanced needs, forcing them to purchase multiple kettlebells of different weights. This undoubtedly increases fitness costs significantly and takes up a lot of space for storage. Utility Model Content

[0004] To solve the above problems, the present invention adopts the following technical solution: a weight-adjustable fitness device, comprising: a first weight unit and at least one second weight unit, wherein the first weight unit and the second weight unit, as well as adjacent second weight units, are connected by a slot and a locking element. The locking element has a lateral extension with a width greater than the width of the bottom end of the locking element. The shape of the slot matches the shape of the locking element. One end of the slot is a closed end, and the other end of the slot is an open end that connects to the edge of the fitness device. On the contact surface between the first weight unit and the second weight unit, and on the contact surface between adjacent second weight units, mutually cooperating limiting grooves and elastic limiting elements are provided. The elastic limiting elements can at least partially embed into the limiting grooves.

[0005] A further improvement is made to the elastic limiting member, which includes an elastic part and a protrusion, wherein the elastic part is connected to the protrusion, and the top end of the protrusion has an arc surface.

[0006] A further improvement is that the limiting groove is disposed within the card slot.

[0007] A further improvement is that the elastic part is an elastic metal sheet, and neither end of the clip extends to the edge of the fitness device. One end of the elastic metal sheet is disposed on the clip, and the other end is provided with the protrusion.

[0008] A further improvement is that the opening end of the slot is provided with an accommodating space to facilitate pressing the outer end of the elastic metal sheet.

[0009] A further improvement is that the outer end of the elastic metal sheet is provided with a coating layer.

[0010] A further improvement is that the elastic part is a spring, which is disposed below the contact surface between the first weight unit and the second weight unit, and below the contact surface between two adjacent second weight units. The top of the protrusion protrudes above the contact surface, and a transition slope is provided around the port of the limiting groove.

[0011] A further improvement is that a handle is provided at the top of the first weight unit.

[0012] The beneficial effects of this utility model are:

[0013] This utility model provides an adjustable-weight fitness device with several advantages. First, it offers exceptional flexibility and adaptability for individual fitness enthusiasts. Beginners can start with a lighter kettlebell and gradually increase the weight, effectively mitigating the risk of injury from excessive load and protecting vulnerable muscles and joints. This greatly encourages beginners to persevere. As training progresses and fitness and muscle strength gradually increase, users can easily add kettlebell weights at any time, precisely matching their evolving strength levels. This provides continuous and appropriate stimulation for muscle growth, helping trainees steadily break through their physical limits and achieve highly efficient training.

[0014] Secondly, in the past, to meet the training needs of different stages, it was often necessary to purchase multiple kettlebells of fixed weights. Now, only one fitness machine is needed, which covers a variety of weight options, significantly reducing the purchase cost. At the same time, it reduces the space occupied by purchasing too many kettlebells in the home or gym, improves space utilization, and makes the fitness environment cleaner and more spacious.

[0015] Furthermore, in professional fitness facilities, there is no need to stockpile a large number of fixed-weight kettlebells to meet the diverse needs of numerous trainees, making equipment management easy and convenient.

[0016] Furthermore, the fitness device of the present invention is ingeniously designed, with the slots, clips, and elastic limiting components fitting together tightly. While ensuring convenient weight adjustment, it also ensures the overall structure of the kettlebell is stable and reliable. During use, there will be no safety hazards such as loosening or shaking due to weight changes, providing users with a solid and reliable training guarantee. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a structural schematic diagram of the weight-adjustable fitness device of this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of the weight-adjustable fitness device of this utility model;

[0020] Figure 3 This is a schematic diagram of the bottom structure of the first weight unit of this utility model. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0022] In the description of the utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of a utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In utility models, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the utility model according to the specific circumstances.

[0025] Example 1

[0026] like Figures 1 to 3 As shown, this utility model provides a weight-adjustable fitness device, including: a first weight unit 1 and at least one second weight unit 2. The first weight unit 1 is usually located at one end of the fitness device. The first weight unit 1 and the second weight unit 2 are connected by a locking slot 3 and a locking piece 4. Two adjacent second weight units 2 are also connected by a locking slot 3 and a locking piece 4. By adjusting the number of connected second weight units 2, the overall weight of the fitness device can be adjusted to adapt to the different usage requirements of different users or the different usage requirements of the same user at different training stages.

[0027] To prevent the second weight unit 2 from detaching when the user picks up the fitness equipment, the locking piece 4 has a lateral extension 41 with a width greater than the width of its bottom end. This lateral extension 41 can form a T-shaped cross-section with the rest of the locking piece 4; it can also form an inverted trapezoidal cross-section with the rest of the locking piece 4; or it can be a horizontally protruding extension 41 of equal length to the locking piece 4, located between its top and bottom, or multiple horizontal protrusions of the same or different heights. Simultaneously, the shape of the locking slot 3 matches the shape of the locking piece 4.

[0028] One end of the slot 3 is a closed end 31 to prevent the second weight unit 2 from slipping after connection. The other end of the slot 3 is an open end 32 that connects to the edge of the fitness equipment. When connecting, the open end 32 of the slot 3 is aligned with one end of the clip 4, and then the first weight unit 1 or the second weight unit 2 is moved along the extension direction of the slot 3 or the clip 4 so that the edge of the connected second weight unit 2 is roughly aligned with the edge of the upper second weight unit 1 or the first weight unit 1.

[0029] To ensure the second weight unit 2 is locked in place and prevents slippage, mutually cooperating limiting grooves 5 and elastic limiting members 6 are provided on the contact surfaces between the first weight unit 1 and the second weight unit 2, as well as on the contact surfaces between adjacent second weight units. After the second weight unit 2 slides into place along the extension direction of the slot 3 or the clip 4, the elastic limiting member 6, under the action of elastic force, can at least partially embed into the limiting groove 5, thereby achieving locking of the second weight unit 2 with the upper first weight unit 1 or the upper second weight unit 2. When weight reduction and disassembly are required, under the action of external force, the portion of the elastic limiting member 6 embedded in the limiting groove 5 is dislodged from the limiting groove 5, and then the second weight unit 2 is moved along the length direction of the slot or the clip, thus completing the separation of the second weight unit 2 from the upper structure.

[0030] The locking element 4 can be located on the bottom surface of the upper structure (the first weight unit or the upper second weight unit) or on the top surface of the lower structure. In this technical solution, the fitness device used is a kettlebell. In order to facilitate its upright placement on a flat surface, its bottom cannot have any protrusions. Therefore, the locking element 4 in this technical solution is set on the top surface of the second weight unit 2. Specifically, the locking element 4 can be fixed by bolts, by welding, or by an integrally formed structure.

[0031] A further improvement is that the elastic limiting member 6 includes an elastic part 61 and a protrusion 62. The elastic part 61 is connected to the protrusion 62. When an external force is applied, the protrusion 62 rises and falls under the action of the elastic part 61, thereby inserting into or disengaging from the limiting groove 5. The top end of the protrusion 62 has an arc surface 621. Due to this arc surface, the protrusion 62 inserts into or disengages from the limiting groove 5 more smoothly. Preferably, the top end of the protrusion 62 is hemispherical.

[0032] Because the elastic part 61 needs to be designed with sufficient clearance when pressing, this would complicate the manufacturing process. To simplify the manufacturing process of this fitness device, a further improvement is made where the limiting groove 5 and the slot 3 are located on the same side, and the limiting groove 5 is located within the slot 3. Thus, the opening end 32 of the slot 3 simultaneously provides clearance when pressing the elastic part 61.

[0033] A further improvement is that the elastic part 61 is an elastic metal sheet. This elastic metal sheet can undergo elastic deformation when subjected to external force. When the external force is removed, the elastic metal sheet returns to its original shape. Neither end of the clip 4 extends to the edge of the fitness equipment. This design serves two purposes: first, to match the one-end closed slot structure; second, to prevent the elastic metal sheet from protruding beyond the edge of the fitness equipment, thus avoiding accidental contact and unsightly appearance; and third, to provide clearance when the elastic metal sheet is pressed down (because the clip protrudes upwards and its end does not extend to the edge of the fitness equipment, there will be a space between the end of the clip and the edge of the fitness equipment, and the outer end of the elastic metal sheet 2 is located above this space, allowing the elastic metal sheet to be pressed down into this space). The inner end of the elastic metal sheet can be fixedly installed on the end of the clip 4 by screws, and the protrusion 62 is connected to the outer end of the elastic metal sheet by welding or threading.

[0034] like Figure 3As shown, to facilitate the user's insertion of their finger above the end of the elastic metal sheet, a further improvement to this technical solution is that the opening end 32 of the slot 3 is provided with a receiving space 7 to facilitate pressing the outer end of the elastic metal sheet. When the width of the widest part of the slot 3 is greater than the average width of an adult thumb, the receiving space 7 can be the same width as the slot 3, in which case the receiving space 7 is an extension of the slot 3. Conversely, when the width of the widest part of the slot 3 is narrower than the average width of an adult thumb, the width of the receiving space 7 is greater than the width of the slot 3.

[0035] In another embodiment, to facilitate the insertion of a finger into the receiving space 7 for pressing, the depth of the receiving space 7 is greater than the depth of the slot 3.

[0036] To increase the friction at the end of the elastic metal sheet, prevent slippage during pressing, and improve comfort, a further improvement to this technical solution is that a covering layer 63 is provided at the outer end of the elastic metal sheet. This covering layer 63 has a certain degree of elasticity, and is preferably a rubber covering layer.

[0037] To make this fitness equipment more suitable for kettlebell use, a further improvement to this technical solution is that the top of the first weight unit 1 is provided with a handle 8, which is preferably arc-shaped to accommodate simultaneous holding by both hands when the kettlebell is in motion.

[0038] Example 2

[0039] The difference between this embodiment and Embodiment 1 is that the elastic part 61 is a spring. The spring is located below the contact surface between the first weight unit 1 and the second weight unit 2, and below the contact surface between two adjacent second weight units 2. That is, the spring can be installed inside the bottom surface of the first weight unit 1 or inside the top surface of the second weight unit 2. The spring is connected to the protrusion 62, the top of which protrudes above the contact surface. A transition slope is provided around the port of the limiting groove 5, and the transition slope is deeper as it gets closer to the opening of the limiting groove 5. In use, as the second weight unit 2 moves, the protrusion 62 gets closer and closer to the limiting groove 5, and eventually slides into the limiting groove 5 along the transition slope, thus locking the second weight unit. When it needs to be separated, simply move the second weight unit 2 along the opening of the slot, so that the protrusion 62 slides out of the limiting groove 5 along the transition slope. Then, as the locking piece completely slides out of the slot, it is disengaged by the moved second weight unit 2.

[0040] Example 3

[0041] The difference between this embodiment and Embodiment 1 is that the top ends of the two first weight units 1 are respectively connected to the two ends of a handle to form a dumbbell structure. By connecting second weight units 2 of different weights or numbers, the weight of the dumbbell can be adjusted. The connection between the handle and the first weight unit 1 can preferably be a threaded connection.

[0042] This utility model provides an adjustable-weight fitness device with several advantages. First, it offers exceptional flexibility and adaptability for individual fitness enthusiasts. Beginners can start with a lighter kettlebell and gradually increase its weight, effectively mitigating the risk of injury from excessive load and protecting vulnerable muscles and joints. This greatly encourages beginners to persevere. As training progresses and fitness and muscle strength increase, users can easily add kettlebell weights at any time, precisely matching their evolving strength levels. This provides continuous and appropriate stimulation for muscle growth, helping trainees steadily break through their physical limits and achieve highly efficient training.

[0043] Secondly, from an economic cost perspective, it saves users a significant amount of money. Previously, to meet training needs at different stages, it was often necessary to purchase multiple kettlebells of fixed weight. Now, only one adjustable weight fitness machine based on this technology is needed, covering a variety of weight options and drastically reducing purchase costs. At the same time, it reduces the space occupied in homes or gyms by purchasing too many kettlebells, improving space utilization and making the fitness environment cleaner and more spacious.

[0044] Furthermore, its advantages become apparent when applied in professional fitness venues. Coaches no longer need to stockpile massive quantities of fixed-weight kettlebells to meet the diverse needs of numerous trainees, making equipment management easy and convenient. During training, the kettlebell weight can be quickly adjusted based on the trainee's immediate physical condition, avoiding interruptions to the training rhythm due to frequent equipment changes, significantly saving training time, making class schedules more compact and efficient, and comprehensively optimizing the training process and experience in professional fitness settings.

[0045] In addition, the fitness equipment has a clever structural design with tight fit between the slots, clips, and elastic limiters. This ensures convenient weight adjustment while maintaining the overall stability and reliability of the kettlebell structure. During use, there will be no safety hazards such as loosening or wobbling due to weight changes, providing users with a solid and reliable training guarantee.

[0046] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A weight-adjustable fitness device, characterized in that, include: The device includes a first weight unit and at least one second weight unit. The first weight unit and the second weight unit, as well as two adjacent second weight units, are connected by a slot and a locking device. The locking device has a lateral extension with a width greater than the width of the bottom end of the locking device. The shape of the slot matches the shape of the locking device. One end of the slot is a closed end, and the other end of the slot is an open end that connects to the edge of the fitness device. The contact surfaces between the first weight unit and the second weight unit, as well as the contact surfaces between two adjacent second weight units, are provided with mutually cooperating limiting grooves and elastic limiting members. The elastic limiting members can at least partially embed into the limiting grooves.

2. The weight-adjustable fitness device according to claim 1, characterized in that, The elastic limiting member includes an elastic part and a protrusion, the elastic part is connected to the protrusion, and the top end of the protrusion has an arc surface.

3. The weight-adjustable fitness device according to claim 2, characterized in that, The limiting groove is disposed within the card slot.

4. The weight-adjustable fitness device according to claim 3, characterized in that, The elastic part is an elastic metal sheet. Neither end of the clip extends to the edge of the fitness device. One end of the elastic metal sheet is disposed on the clip, and the other end is provided with the protrusion.

5. The weight-adjustable fitness device according to claim 4, characterized in that, The slot has an opening end that provides a space for pressing the outer end of the elastic metal sheet.

6. The weight-adjustable fitness device according to claim 5, characterized in that, The outer end of the elastic metal sheet is covered with a coating layer.

7. The weight-adjustable fitness device according to claim 2, characterized in that, The elastic part is a spring, which is located below the contact surface between the first weight unit and the second weight unit, and below the contact surface between two adjacent second weight units. The top of the protrusion protrudes above the contact surface, and a transition slope is provided around the port of the limiting groove.

8. The weight-adjustable fitness device according to claim 1, characterized in that, The first weight unit has a handle at its top.

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