A dynamic fitness dumbbell

Abstract

The present application relates to the field of physical fitness, in particular to a dynamic fitness dumbbell, comprising dumbbell pieces, a handle, a rotating mechanism and a control mechanism; the two ends of the handle are respectively fixedly connected with the dumbbell pieces, wherein the dumbbell pieces are of a hollow structure; the rotating mechanism is installed in the dumbbell pieces; the control mechanism is in frictional contact with the arc-shaped ball through a friction rod to provide a tangential force of the arc-shaped ball, and then the fitness dumbbell produces irregular shaking under the action of the precession effect, and the setting of the pre-stress before fitness is provided; the present application provides the condition for the rotation of the rotating mechanism through the pre-stress set before the use of fitness, so that the user can control the wrist at any time during use to achieve the purpose of body coordination training by the pre-stress and the swing of the wrist.

Description

Technical Field

[0001] The invention relates to the field of bodybuilding auxiliary equipment, in particular to a dynamic bodybuilding dumbbell. Background Art

[0002] Dumbbells are a common piece of equipment in gyms, mostly used for large-base strength training and skill flexibility training; the dumbbells used in aerobics are usually small and lightweight equipment. Unlike the accumulated weights in strength training, their design principle is to exercise various parts of the body through continuous lifting, pushing, pulling, curling and other movements, thereby achieving the purpose of enhancing muscle strength and activity, and then increasing the body's metabolic rate.

[0003] In aerobics, aligning aerobic exercise with music makes the workout more interesting and enriching. Current design features of these dynamic dumbbells often include adjustable weights, colored or fluorescent coatings, and shock-absorbing outer layers, making them more stable and safe during use. Furthermore, the shape and size of these dynamic dumbbells are specially designed to make them easier to grip and operate, increasing the convenience and comfort of exercise.

[0004] For newcomers who have just entered the gym for aerobics training, they are not familiar with the specific movements, and some postures are prone to errors or irregularities. If they use the wrong exercises without correction, the muscles may become unsightly and the effect may not be obvious in the long run. Similarly, for those who need to burn fat quickly, a longer warm-up time is required during aerobics using dynamic dumbbells to allow the body to enter a better fat-burning state.

[0005] In order to solve these problems and thus improve the auxiliary effect of the dynamic dumbbell, the present invention provides a dynamic fitness dumbbell to solve the problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that for people who have not fully mastered fitness movements, their postures are not standard when using dynamic dumbbells, and the dynamic dumbbells cannot provide a guiding or auxiliary role, thus affecting the effect; resulting in the use of dynamic dumbbells being subjective, and the fitness effect is proportional to the user's proficiency.

[0007] In order to solve the technical problem, the technical solution adopted by the present invention is: providing a dynamic fitness dumbbell, including dumbbell plates, a grip, a rotating mechanism and a regulating mechanism; the two ends of the grip are respectively fixedly connected with dumbbell plates, wherein the dumbbell plates are hollow structures; the rotating mechanism is installed in the dumbbell plates, and the rotating mechanism is in friction contact with the arc ball through the friction rod to provide a tangential force to the arc ball, thereby causing the fitness dumbbell to produce irregular shaking under the action of the precession effect; the regulating mechanism rotates synchronously with the torsion component through the sliding of the rotating ring.

[0008] The rotating mechanism includes a rotating shaft, a fixed rotating column and an arc ball; the inner wall of the dumbbell plate is provided with an annular track, the two ends of the rotating shaft are clamped in the annular track, the fixed rotating column is fixedly connected to the middle of the rotating shaft, and the arc ball is fixedly connected to the fixed rotating column coaxially; the arc ball is tangent to the inner wall of the dumbbell plate; the inner wall of the dumbbell plate is provided with a circular opening, the size of the circular opening is the same as the inner diameter of the grip; the friction force of the rotating shaft revolving around the annular track is greater than the friction force of the arc ball rotating on its own; the side wall of the arc ball is provided with a spiral groove, and the groove is spiral-shaped, so that the friction rod can be engaged by sliding, and due to the change of the engaging position, when the rotating shaft rotates, the friction rod is periodically engaged into the groove.

[0009] Since the arc ball and the rotating shaft are set to rotate in two directions, the starting process is that, through shaking before use and with the assistance of the coil spring, the arc ball with smaller friction force than the revolution in the arc track is rotated first, and then the dumbbell plates drive the rotating shaft of the arc ball to swing through continuous swinging during fitness. The swinging process is divided into two cases. The first is to swing downward while holding the handle to make the rotating shaft of the arc ball roll forward. In this case, since the rotating shaft of the arc ball is deflected by the external torque, a rotational torque is generated to counteract the deflection. Due to this torque, the front end of the rotating shaft is subjected to an upward force and is close to the upper edge of the circular track, while the rear end is subjected to a downward force and is close to the lower edge of the circular track. At this time, from the front of the arc ball If observed from the front, the front end of the rotating shaft is subjected to an upward force, and rolls obliquely upward along the upper edge of the circular track. The friction force drives the rotating shaft to drive the arc ball to rotate clockwise. If the inclination direction of the circular track is opposite at this time, when the rotating shaft rolls above it, the friction force can only make the rotating shaft and the fixed rotating column in the center of the arc ball rotate idly, and the arc ball is not subjected to torque, so the arc ball can only be accelerated clockwise by the unidirectional torque; if observed from the back of the arc ball, the back of the rotating shaft will be subjected to a downward force, and roll obliquely downward along the lower edge of the circular track. At this time, the friction force causes the rotating shaft to drive the arc ball to rotate counterclockwise. Once the inclination direction of the circular track is opposite, the rotating shaft drives the fixed rotating column to rotate idly, so when swinging downward, the arc ball will only accelerate in the direction of rotation at the start.

[0010] The second situation is that the upward swing causes the rotating shaft of the arc ball to roll backward. At this time, the front end of the restoring force is downward and the rear end is upward. When viewed from the front, the rotating shaft will roll diagonally downward close to the lower edge of the circular track, and still drive the arc ball to rotate in the same direction. If the circular track changes its tilt direction, the rotating shaft will still idle. When viewed from the back, the rotating shaft will roll upward close to the upper edge of the circular track, driving the arc ball to rotate counterclockwise and accelerate. If the circular track changes direction, the rotating shaft will continue to idle. Therefore, no matter how it is swung, friction can always allow the rotating shaft to drive the arc ball to accelerate continuously. The higher the speed of the arc ball, the greater the rotational torque generated when the rotating shaft rolls, and the greater the force applied to the hand by this torque through the outer shell.

[0011] The regulating mechanism includes a torsion assembly, a transmission housing and a coil spring; one end of the torsion assembly is clamped with the transmission housing, and the coil spring is fixedly connected to the lower end of the transmission housing; the inner diameter of the transmission housing is set to twice the maximum outer diameter of the coil spring; the torsion assembly is arranged in a mirror image relative to the vertical section in the middle of the grip.

[0012] The torsion assembly is arranged inside the handle, and the torsion assembly is movably clamped by pushing and pulling the clamping ring. The torsion assembly is arranged in a mirror image relative to the middle cross-section of the handle, so that the two rotating rings can rotate around the central axis of the handle and rotate independently. The torsion assembly transmits force to the transmission housing, and the transmission housing and the side wall of the contact block are fixedly connected, so that the contact block rotates, providing the rotational force of the coil spring.

[0013] The torsion assembly includes a clamping wheel, a transmission shaft, a limiting rod, a cylindrical clamping block, a clamping shaft and a fixed shaft; the clamping wheel is fixedly connected to the transmission shaft coaxially, the middle part of the transmission shaft is fixedly connected to the limiting rod, the end of the transmission shaft is fixedly connected to a cylindrical clamping block, the cylindrical clamping block is movably clamped to the clamping shaft, and there are two clamping shafts, wherein the two clamping shafts are rotatably connected coaxially and a fixed shaft is provided in the middle, and the fixed shaft is fixedly connected to the rotating ring.

[0014] The main purpose of the clamping shaft is to reduce the friction force of the rotation of the clamping wheel. The clamping wheel is set to be semicircular and the side wall is provided with a clamping tooth that is clamped with the clamping groove; at the same time, the clamping wheel is clamped with the clamping groove inside the interlayer of the transmission case, and then the rotation of the clamping wheel is passed through the semicircular structure, so that the transmission case rotates intermittently, the spiral spring rotates, and the intermittent rotation can well slowly increase the rotation of the transmission case, thereby reducing the faster rotation speed provided by the precession effect, which may hurt the user's palm.

[0015] The limit rods are provided in a number of five and arranged in a circular array around the transmission shaft. The main purpose of providing five limit rods is that after use, the user can push the arc ball with the palm of one hand on both sides, thereby slowing down the arc ball through friction. Therefore, in addition to the function of pushing the arc ball, the friction rod also functions as a brake after use.

[0016] The gripping rod includes a rotating ring and a clamping ring, and the clamping ring is provided with two and arranged in a coaxial mirror image. One end of the clamping ring is provided with a limiting groove that is clamped with the limiting rod, and the number is set to 5, and an annular sleeve is provided at the position in contact with the limiting rod. One side of the limiting rod is fixedly connected to a block, and the block is clamped with a compression spring. A plurality of compression springs are arranged in a ring array around the central axis of the rotating ring; and the number of the limiting grooves is the same as that of the limiting rods, so that when the rotating ring slides, the torsion mechanism can be synchronized with the gripping rod through the clamping of the limiting rod and the limiting groove, thereby providing convenience of use; at the same time, when the rotating ring slides, the compression spring can be deformed, and this process is the process of applying force to the coil spring. After the application in the rotation is completed, the rotating ring can be quickly restored to a fitting state through the elastic force, thereby allowing the user to hold the gripping rod tightly.

[0017] The transmission housing is a semi-arc-shaped housing, and the end farther from the coil spring is fixedly connected to a limiting column. An interlayer is provided in the middle of the limiting column, and an inner wall of the interlayer is provided with a slot engaged with a latching tooth. The transmission housing is a semi-arc-shaped housing, so that the transmission housing rotates under the action of the limiting rod, and the structure of the transmission housing is semi-arc-shaped, so the rotation of the transmission housing disperses the rotational force to the contact block. Since the radii of the rotating block and the transmission housing are different, they are set to a semi-arc shape, which transmits the force to the coil spring, thereby providing the friction rod with multiple tangential forces on the arc ball.

[0018] The lower end of the transmission housing is fixedly connected to the side wall of the contact block, and the lower end of the contact block is clamped with a coil spring, and the coil spring is clamped in the rotating disk. The other end of the rotating disk is fixedly connected to a friction rod, and the friction rods are arranged in a ring array around the rotating disk, and the ends are arranged in an arc shape. The arc shape is set so that the outermost end is set to a convex shape, so that the friction rod can better contact the side wall of the arc ball and rotate cyclically, thereby providing tangential force to make the arc ball rotate.

[0019] The side wall of the coil spring is provided with a plurality of rectangular protrusions, and the interior of the rotating disk is provided with a rectangular groove engaged with the rectangular protrusions; due to the consideration of different applicable groups during use, the coil spring may be overloaded during the twisting of the rotating ring. Therefore, when the coil spring rotates, when the friction of the rotating shaft is too large, the coil spring will be pushed slowly. If the coil spring is continuously rotated, it will cause damage to the coil spring. Therefore, a rectangular groove is provided. Under non-overload conditions, the rectangular block is engaged in the rectangular groove. At this time, the rectangular groove and the rectangular block serve to fix the coil spring. When an overload occurs, the user continues to rotate, and the coil spring cannot release the rotational force in the first time. At this time, the rectangular block will disengage from the rectangular groove, thereby buffering the rotational force beyond the overload, thereby preventing damage to the coil spring.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The present invention sets a prestress before use for fitness, and provides the conditions for the rotation of the rotating mechanism through the mobilization mechanism. Therefore, when the user uses it, the advance prestress combined with the swing of the user's wrist causes the rotating mechanism to continuously accelerate under the action of the precession effect, thereby providing multi-directional swinging during the fitness exercise process. Therefore, the user needs to control the wrist at all times during use to achieve the purpose of body coordination training.

[0022] 2. The present invention provides a friction rod synchronized with the adjustment mechanism. Before use, the friction rod transmits force through friction, thereby providing rotational force for the arc ball. After use, the user can offset the current irregular vibration of the dynamic dumbbell by operating with one hand. At the same time, through the transmission, the limit rod cooperates with the limit groove to achieve braking of the dynamic dumbbell.

[0023] 3. The present invention provides a compression spring and a stopper that cooperate with the torsion mechanism on the inner wall of the rotating ring, so as to provide a rapid reset of the rotating ring after the spiral spring provides the rotational force, thereby improving the conversion rate of the applied kinetic energy, providing the user with a more comfortable grip, and reducing the probability of slipping out of the hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] The above and other aspects of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0026] Figure 1 It is an overall schematic diagram of the present invention;

[0027] Figure 2 It is an overall three-dimensional cross-sectional view of the present invention;

[0028] Figure 3 It is an overall two-dimensional cross-sectional view of the present invention;

[0029] Figure 4 is a schematic diagram of a twisting assembly of the present invention;

[0030] Figure 5 It is a schematic diagram of the transmission housing structure of the present invention;

[0031] Figure 6 This is a schematic diagram of the interlayer card slot structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the interior of the coil spring of the present invention;

[0033] Figure 8 It is a schematic diagram of the contact between the mobilization mechanism and the arc ball of the present invention;

[0034] Figure 9 This is a schematic diagram of the installation position of the mobilization mechanism of the present invention;

[0035] Figure 10 It is a schematic diagram of the rotating ring engaging the limiting rod of the present invention.

[0036] In the figure: 1. dumbbell plate; 2. rotating mechanism; 21. annular track; 22. rotating shaft; 23. fixed rotating column; 24. arc ball; 25. circular opening; 3. grip; 31. rotating ring; 311. limiting groove; 32. snap ring; 4. regulating mechanism; 41. torsion assembly; 411. snap wheel; 4111. snap teeth; 412. transmission shaft; 413. limiting rod; 414. cylindrical clamping block; 415. snap shaft; 416. fixed shaft; 42. transmission housing; 421. limiting column; 422. interlayer; 423. clamping groove; 43. coil spring; 431. contact block; 432. rotating disk; 433. friction rod; 434. rectangular protrusion; 435. rectangular groove. DETAILED DESCRIPTION

[0037] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0038] like Figures 1 to 10As shown, a dynamic fitness dumbbell includes a dumbbell plate 1, a grip 3, a rotating mechanism 2 and a regulating mechanism 4; the two ends of the grip 3 are respectively fixedly connected to the dumbbell plate 1, wherein the dumbbell plate 1 is a hollow structure; the rotating mechanism 2 is installed in the dumbbell plate 1, and the regulating mechanism 4 is in frictional contact with the arc ball 24 through the friction rod 433 to provide a tangential force to the arc ball 24, thereby causing the fitness dumbbell to produce irregular shaking under the action of the precession effect, and through the active clamping connection between the clamping shaft 415 and the cylindrical clamping block 414, a pre-fitness prestress setting is provided.

[0039] The rotating mechanism 2 is installed inside the dumbbell plate 1, making the dumbbell more flexible and stable during exercise, and less likely to produce excessive shaking, thus ensuring stability during use. At the same time, the design of the rotating mechanism 2 also makes the dumbbell's movement trajectory more diverse and interesting, thereby increasing the interest of exercise; the control mechanism 4 provides a tangential force to the dumbbell through the friction contact between the friction rod 433 and the arc ball 24. This design allows the dumbbell to produce irregular shaking during exercise in addition to the traditional up and down movement, thereby better training the user's coordination and sense of balance; the movable clamping design of the clamping shaft 415 and the cylindrical clamping block 414 allows the fitness user to pre-set a certain amount of stress before starting exercise, so that the fitness user can better feel the tension and relaxation of the muscles during exercise, providing a more realistic and effective exercise experience for the fitness user.

[0040] like Figure 2 and Figure 3 As shown, the rotating mechanism 2 includes a rotating shaft 22, a fixed rotating column 23 and an arc-shaped ball 24; the inner wall of the dumbbell plate 1 is provided with an annular track 21, both ends of the rotating shaft 22 are clamped in the annular track 21, the fixed rotating column 23 is fixedly connected to the middle part of the rotating shaft 22, and the arc-shaped ball 24 is fixedly connected to the fixed rotating column 23 coaxially; the arc-shaped ball 24 is tangent to the inner wall of the dumbbell plate 1; the inner wall of the dumbbell plate 1 is provided with a circular opening 25, the size of the circular opening 25 is the same as the inner diameter of the grip 3; the friction force of the rotating shaft 22 revolving around the annular track 21 is greater than the friction force of the arc-shaped ball 24 rotating.

[0041] like Figure 4 As shown, the regulating mechanism 4 includes a torsion assembly 41, a transmission housing 42 and a coil spring 43; one end of the torsion assembly 41 is engaged with the transmission housing 42, and the coil spring 43 is fixedly connected to the lower end of the transmission housing 42; the inner diameter of the transmission housing 42 is set to twice the maximum outer diameter of the coil spring 43; the torsion assembly 41 is arranged in a mirror image relative to the middle vertical section of the handle 3.

[0042] The torsion assembly 41 is arranged inside the handle 3, and the torsion assembly 41 is movably clamped by pushing and pulling the clamping ring 32. The torsion assembly 41 is arranged in a mirror image relative to the middle section of the handle 3, so that the two rotating rings 31 can rotate around the central axis of the handle 3 and rotate independently. The torsion assembly 41 transmits force to the transmission housing 42, and the transmission housing 42 is fixedly connected to the side wall of the contact block 431, so that the contact block 431 rotates, providing the rotational force of the coil spring 43.

[0043] like Figure 5 As shown, the inner diameter of the transmission housing 42 is set to twice the maximum outer diameter of the coil spring 43. This not only effectively limits the movement of the coil spring 43, but also maximizes space utilization, making the entire dumbbell more compact and portable. The torsion assembly 41 is arranged in a mirror image relative to the vertical cross-section of the middle of the handle 3. This design allows the two rotating rings 31 to rotate independently around the central axis of the handle 3. This independence not only enhances the diversity of exercises but also allows the user to more easily adjust the direction and angle of movement. By pushing and pulling the connecting ring 32, the user can flexibly engage the torsion assembly 41, making the entire dumbbell more flexible and convenient during use. At the same time, the torsion assembly 41 transmits force to the transmission housing 42. The transmission housing 42 is fixedly connected to the side wall of the contact block 431, causing the contact block 431 to rotate, thereby providing rotational force for the coil spring 43.

[0044] like Figure 4 As shown, the torsion assembly 41 includes a clamping wheel 411, a transmission shaft 412, a limiting rod 413, a cylindrical clamping block 414, a clamping shaft 415 and a fixed shaft 416; the clamping wheel 411 is fixedly connected to the transmission shaft 412 coaxially, the middle part of the transmission shaft 412 is fixedly connected to the limiting rod 413, the end of the transmission shaft 412 is fixedly connected to the cylindrical clamping block 414, the cylindrical clamping block 414 is movably clamped with the clamping shaft 415, and the clamping shaft 415 is provided in two, wherein the two clamping shafts 415 are coaxially rotatably connected and a fixed shaft 416 is provided in the middle.

[0045] The main purpose of the clamping shaft 415 is to reduce the rotational friction of the clamping wheel 411. The clamping wheel 411 is set to be semicircular and the side wall is provided with a clamping tooth 4111 that is clamped with the clamping groove 423; at the same time, the clamping wheel 411 is clamped with the clamping groove 423 inside the interlayer 422 of the transmission shell 42, and then the rotation of the clamping wheel 411 is passed through the semicircular structure, so that the transmission shell 42 rotates intermittently, and the coil spring 43 rotates. The intermittent rotation can well slowly increase the rotation of the transmission shell 42, thereby reducing the faster rotation speed provided by the precession effect, thereby hurting the user's palm.

[0046] The number of the limit rods 413 is 5 and they are arranged in a circular array around the transmission shaft 412. The main purpose of setting the limit rods 413 as 5 is that after use, the user can push the arc ball 24 by the palm of one hand, and then slow down the arc ball 24 by friction. Therefore, in addition to the function of pushing the arc ball 24, the function of the friction rod 433 becomes braking after use.

[0047] The snap-in wheel 411 is fixedly connected to the transmission shaft 412 coaxially, ensuring the smoothness and fluency of the rotation. The middle part of the transmission shaft 412 is fixedly connected to the limit rod 413, which increases the strength and stability of the overall structure. The end of the transmission shaft 412 is fixedly connected with a cylindrical clamping block 414, so that the rotation of the torsion assembly 41 can be transmitted more effectively. The cylindrical clamping block 414 is movably connected to the snap-in shaft 415, so that the entire assembly has better flexibility to adapt to different usage requirements. The snap-in shaft 415 is set to two, which are coaxially connected for rotation, and a fixed shaft 416 is set in the middle to increase the stability of the rotation. The fixed shaft 416 is fixedly connected to the rotating ring 31, providing better balance and stability for the fitness dumbbell.

[0048] like Figure 6 As shown, the engaging wheel 411 is configured in a semicircular shape, with a sidewall provided with engaging teeth 4111 that engage with engaging slots 423, thereby enabling better coordination with the transmission housing 42 during rotation. Furthermore, the engaging wheel 411 engages with the engaging slots 423 within the interlayer 422 of the transmission housing 42, converting the rotation of the engaging wheel 411 into intermittent rotation of the transmission housing 42 through the semicircular structure, which in turn causes the coil spring 43 to rotate accordingly. This intermittent rotation effectively increases the rotation speed of the transmission housing 42, causing it to increase slowly, thereby reducing the faster rotation speed caused by the precession effect and preventing injury to the user's palm.

[0049] like Figure 9 and Figure 10 As shown, the gripping rod 3 includes a rotating ring 31 and a clamping ring 32. The clamping ring 32 is provided in two and arranged in a coaxial mirror image. One end of the clamping ring 32 is provided with a limiting groove 311 that is clamped with the limiting rod 413. The number is set to 5, and the number of the limiting grooves 311 is the same as the number of the limiting rods 413. Therefore, when the rotating ring 31 slides, the torsion mechanism can be synchronized with the gripping rod 3 through the clamping of the limiting rod 413 and the limiting groove 311, thereby providing convenience in use.

[0050] like Figure 7 and Figure 8As shown, the transmission housing 42 is a semi-arc-shaped housing, and the end farther from the coil spring 43 is fixedly connected to the limiting column 421, and an interlayer 422 is provided in the middle of the limiting column 421, and the inner wall of the interlayer 422 is provided with a slot 423 engaged with the latching tooth 4111; the transmission housing 42 is a semi-arc-shaped housing, so that the transmission housing 42 rotates under the action of the limiting rod, and the structure of the transmission housing 42 is semi-arc-shaped, so the rotation of the transmission housing 42 disperses the rotational force to the contact block 431. Since the radii of the rotating block and the transmission housing 42 are different, they are set to a semi-arc shape, which transmits the force to the coil spring 43, thereby providing the friction rod 433 with multiple tangential forces on the arc ball 24.

[0051] The lower end of the transmission housing 42 is fixedly connected to the side wall of the contact block 431. The lower end of the contact block 431 is clamped with a coil spring 43, and the coil spring 43 is clamped in the rotating disk 432. The other end of the rotating disk 432 is fixedly connected to a friction rod 433. The friction rods 433 are arranged in a circular array around the rotating disk 432, and the ends are set to be arc-shaped. The arc shape is set so that the outermost end is set to be convex, so that the friction rod 433 can better contact the side wall of the arc ball 24 and rotate in a cycle, thereby providing tangential force to rotate the arc ball 24.

[0052] The two snap rings 32 are arranged as mirror images of each other, each with five limit slots 311 at one end, the same number as the limit rods 413. This design allows the torsion mechanism to synchronize with the grip 3 as the rotating ring 31 slides, through the engagement of the limit rods 413 and the limit slots 311, thus providing ease of use. The transmission housing 42 is a semi-arc-shaped housing, allowing it to rotate under the action of the limit rods. Its semi-arc-shaped structure also distributes the rotational force to the contact block 431. Due to the different radii of the rotating block and the transmission housing 42, the semi-arc shape is adopted, transmitting the force to the coil spring 43. This design enables the friction rod 433 to apply multiple tangential forces to the curved ball 24, enhancing the fitness effect. The lower end of the transmission housing 42 is fixedly connected to the side wall of the contact block 431, and the lower end of the contact block 431 is engaged with the coil spring 43, which is engaged within the rotating disk 432. The other end of the rotating disk 432 is fixedly connected to a friction rod 433, which is arranged in a circular array around the rotating disk 432 and has an arc-shaped end. This design allows the outermost end to be configured as a convex shape, so that the friction rod 433 can better contact the side wall of the arc-shaped ball 24.

[0053] like Figure 8As shown, the side wall of the coil spring 43 is provided with a plurality of rectangular protrusions 434, and the interior of the rotating disk 432 is provided with a rectangular groove 435 that is engaged with the rectangular protrusion 434; due to the consideration of different applicable groups during use, the coil spring 43 may be overloaded during the twisting of the rotating ring 31. Therefore, when the coil spring 43 rotates, when the friction force of the rotating shaft 22 is too large, the coil spring 43 is slowly pushed. If the coil spring 43 is continuously rotated, it will cause damage to the coil spring 43. Therefore, a rectangular groove 435 is provided. In the case of no overload, the rectangular block is engaged in the rectangular groove 435. At this time, the rectangular groove 435 and the rectangular block serve to fix the coil spring 43. In the case of overload, the user continues to rotate, and the coil spring 43 cannot release the rotational force immediately. At this time, the rectangular block will disengage from the rectangular groove 435, thereby buffering the rotational force other than the overload, thereby preventing damage to the coil spring 43.

[0054] In daily use, due to individual differences in strength, coil spring 43 may become overloaded due to excessive friction. When the friction of rotating shaft 22 is too great, coil spring 43 will slowly push forward. Continuous rotation of coil spring 43 may damage coil spring 43. When overload occurs, the user continues to rotate, but coil spring 43 cannot immediately release the rotational force. At this time, the rectangular block will disengage from the rectangular slot 435, thereby buffering the rotational force beyond the overload and preventing damage to coil spring 43. This design not only reflects its high efficiency and practicality, but also provides safety for users in actual use.

[0055] During operation of the present invention, the dynamic dumbbell needs to be placed still before use. The user slides the rotating ring 31 with both hands, and the rotating ring 31 is pushed to both ends. After the five limit rods 413 are respectively inserted into the limit grooves 311, the rotation of the rotating ring 31 is transmitted to the friction rod 433 to push the tangential force of the arc ball 24, and the rotating ring 31 is twisted quickly. After the rotational force is applied, due to the presence of the block at this time, the compression spring is deformed when the rotating ring 31 is slid. When the application stops, the pressure is released and the two rotating rings 31 rebound quickly.

[0056] The other end of the transmission shaft 412 rotates synchronously with the clamping wheel 411. The clamping wheel 411 is a semicircular structure and is clamped in the interlayer 422 of the transmission housing 42. The rotational force of the transmission housing 42 is transmitted to the coil spring 43 through the transmission of the contact block 431, thereby rotating the rotating disk 432. The friction rod 433 contacts the arc ball 24, and the friction rod 433 is clamped in the groove. Through continuous rotation, the friction rod 433 drives the arc ball to rotate, and due to the arc Structure, after one of the friction rods 433 is out of the groove, the friction rod 433 behind it will be subsequently locked in, and because the radius is set to half of the circular opening 25, the position where multiple friction rods 433 contact the arc ball 24 is the outermost tangent of the arc, and then the contact position between the friction rod 433 and the arc ball 24 is the center of the circle where the central axis of the transmission housing 42 is located; therefore, the friction rod 433 provides multi-directional tangential force. Since the friction force of the revolution is set to be greater than the rotation, the continuous twisting before use, The arc ball 24 is gradually accelerated. After accelerating to a certain extent, the user quickly retracts the rotating ring 31. At this time, the force provided by the user stops, and a short rotational force is given by the coil spring 24. The arc ball 24 rotates under the residual force of the coil spring 43. Under the action of the precession effect, the rotating mechanism 2 continues to rotate, and at this time the limit rod 413 disengages from the clamping groove. The limit rod 413 continues to rotate under the action of the clamping shaft 415, and at this time the limit rod 413 has disengaged from the limit groove 311. When the user holds the handle 3, the limit rod 413 rotates in the annular gap between the clamping ring 32 and the rotating ring 31. At this time, the limit rod 413 is in the protective cover, and continues to provide conditions for the arc ball 24 and the rotating shaft 22 to rotate with the rhythm of the fitness exercise dance, thereby providing continuous force. After use, the rotating ring 31 is slowly moved by the palm of the hand or moved by external force, so that the limit groove 311 hinders the rotation of the limit rod 413, thereby providing braking.

[0057] The description herein is provided to enable one of ordinary skill in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to one of ordinary skill in the art, and the overall principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but should be given the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dynamic fitness dumbbell, comprising dumbbell plates (1) and a grip (3); dumbbell plates (1) are fixedly connected to both ends of the grip (3), wherein the dumbbell plates (1) are hollow in structure; and the invention is characterized in that: The invention also includes a rotating mechanism (2) and a regulating mechanism (4); the rotating mechanism (2) is installed in the dumbbell plate (1); the rotating mechanism (2) is in friction contact with the arc ball (24) through the friction rod (433) to provide a continuous tangential force to the arc ball (24), so that the arc ball (24) rotates under the action of the precession effect; the regulating mechanism (4) provides the rotating mechanism (2) with a rotating force in the process of being movably engaged with the limit rod (413) through the sliding of the rotating ring (31), and adjusts the arc ball (24) through the torsion component (41); The rotating mechanism (2) comprises a rotating shaft (22), a fixed rotating column (23) and an arc-shaped ball (24); the inner wall of the dumbbell plate (1) is provided with an annular track (21), the two ends of the rotating shaft (22) are clamped in the annular track (21), the fixed rotating column (23) is fixedly connected to the middle of the rotating shaft (22), and the arc-shaped ball (24) is fixedly connected to the fixed rotating column (23) coaxially; the arc-shaped ball (24) is tangent to the inner wall of the dumbbell plate (1); the inner wall of the dumbbell plate (1) is provided with a circular opening (25), the size of the circular opening (25) is the same as the inner diameter of the handle (3); the friction force of the rotating shaft (22) revolving around the annular track (21) is greater than the friction force of the arc-shaped ball (24) rotating; the side wall of the arc-shaped ball (24) is provided with a rotating groove; The regulating mechanism (4) comprises a torsion assembly (41), a transmission housing (42) and a coil spring (43); one end of the torsion assembly (41) is engaged with the transmission housing (42), and the coil spring (43) is fixedly connected to the lower end of the transmission housing (42); the inner diameter of the transmission housing (42) is set to twice the maximum outer diameter of the coil spring (43); the torsion assembly (41) is arranged in a mirror image relative to the middle vertical section of the grip rod (3); The torsion assembly (41) comprises a clamping wheel (411), a transmission shaft (412), a limiting rod (413), a columnar clamping block (414), a clamping shaft (415) and a fixed shaft (416); the clamping wheel (411) is fixedly connected to the transmission shaft (412) coaxially, the middle of the transmission shaft (412) is fixedly connected to the limiting rod (413), the end of the transmission shaft (412) is fixedly connected to the columnar clamping block (414), the columnar clamping block (414) is clamped to the clamping shaft (415), and two clamping shafts (415) are provided, wherein the two clamping shafts (415) are rotatably connected coaxially and clamped in the fixed shaft (416).

2. A dynamic fitness dumbbell according to claim 1, characterized in that: The transmission housing (42) is a semi-arc-shaped housing, and one end farther from the coil spring (43) is fixedly connected to a limiting column (421). An interlayer (422) is provided in the middle of the limiting column (421), and a slot (423) is provided on the inner wall of the interlayer (422) for engaging with the locking teeth (4111).

3. The dynamic fitness dumbbell according to claim 1, characterized in that: The lower end of the transmission housing (42) is fixedly connected to the side wall of the contact block (431); the lower end of the contact block (431) is clamped with a coil spring (43); the coil spring (43) is clamped in the rotating disk (432); the other end of the rotating disk (432) is fixedly connected with a friction rod (433); a plurality of friction rods (433) are arranged in an annular array around the rotating disk (432), and the ends are arranged in an arc shape; the friction rods (433) are clamped with grooves on the surface of the arc-shaped ball (24).

4. The dynamic fitness dumbbell according to claim 3, characterized in that: The side wall of the coil spring (43) is provided with a plurality of rectangular protrusions (434), and the interior of the rotating disk (432) is provided with a rectangular groove (435) engaged with the rectangular protrusions (434).

5. The dynamic fitness dumbbell according to claim 1, characterized in that: The engaging wheel (411) is arranged in a semicircular shape and has a side wall provided with engaging teeth (4111) engaging with the engaging groove (423).

6. The dynamic fitness dumbbell according to claim 1, characterized in that: The limiting rods (413) are provided in a number of five and arranged in a circular array around the transmission shaft (412).

7. The dynamic fitness dumbbell according to claim 1, characterized in that: The gripping rod (3) comprises a rotating ring (31) and a clamping ring (32), wherein two clamping rings (32) are provided and arranged in a coaxial mirror image, and an annular sleeve is provided at a position in contact with the limiting rod (413); one end of the clamping ring (32) is provided with a limiting groove (311) clamped with the limiting rod (413), and the number of the limiting grooves (311) is set to 5; one side of the limiting rod (413) is fixedly connected with a stopper, and the stopper is clamped with a compression spring, and a plurality of compression springs are arranged in an annular array around the central axis of the rotating ring.

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