Patent Application
20230181958
The present invention relates to the technical field of dumbbells, and in particular relates to a weight-adjustable dumbbell component.
A dumbbell is one of popular fitness equipment in daily life. The traditional dumbbells are usually divided into one-piece dumbbells and assembled dumbbells. The assembled dumbbell may be suitable for more people due to adjustable weight, and in the assembled dumbbell, the weight of the dumbbell is adjusted by adjusting the number of dumbbell plates on a dumbbell bar, thus switching the training intensity; due to the fact that the dumbbell plates on the ordinary dumbbell are spirally fastened through fasteners at two ends, the fasteners may loosen during physical training to cause the dumbbell plates to injure feet or damage the ground. The assembled dumbbell in the prior art is transformed into a form that the dumbbells plates are in a splicing form, and then the dumbbell plates are fixed to the dumbbell bar assembly through a limiting structure. Although the loosening of the dumbbell plates during physical training is relieved, due to the fact that a starting device and an unlocking device on the structure for limiting motion of the dumbbell plates are all arranged on the dumbbell, the safe use of the dumbbell cannot be ensured when the physical training is excessively aggressive or a part for unlocking the limiting structure is touched, and the risk of different extent is existent. In the life, the provision of an assembled dumbbell which is hard to unlock and capable of stably limiting dumbbell plates during use has become a technical problem that must be solved.
Hence, solving the technical, problem has become a top priority.
An objective of the present invention is to provide a weight-adjustable dumbbell component, which has a dumbbell bar assembly, dumbbell plates, a dumbbell base, and a weight adjustable mechanism, and is further provided with limiting mechanisms for preventing the dumbbell plates from loosening during use; and parts for unlocking the limiting mechanisms are arranged on the dumbbell base to effectively avoid the danger that the limiting mechanisms are unlocked due to improper use during physical training.
A weight-adjustable dumbbell component provided by the present invention comprises a dumbbell base, a plurality of dumbbell plates arranged on the dumbbell bases, and a dumbbell bar assembly for mounting the dumbbell plates, wherein the dumbbell bar assembly comprises a rotating shaft and a handle tube sleeved at the middle of the rotating shaft; an end face of the rotating shaft is in a large cut circle shape, and two ends of the rotating shaft are sequentially sleeved with the following parts: hollow inserting plates for fitting and fixing the dumbbell plates and symmetrically arranged at two sides of the handle tube, wherein the hollow inserting plates are provided with open grooves for fitting and assembling and disassembling the dumbbell plates; and limiting mechanisms for limiting rotation of the rotating shaft and arranged at outer sides of the hollow inserting plates, wherein inserting holes are formed at peripheries of the limiting mechanisms, and abutting bumps fitted with the inserting holes are arranged at two ends of the dumbbell base; wherein the limiting mechanisms are unlocked when the abutting bumps extend into the inserting holes, and various dumbbell plates are sequentially assembled on and disassembled from the hollow inserting plates through the rotation of the rotating shaft; and the limiting mechanisms are locked when the abutting bumps are separated from the inserting holes, and the limiting mechanisms are configured to limit relative rotation of the rotating shaft.
By adopting above structure, the limiting mechanisms are unlocked through the abutting bumps arranged on the dumbbell base; when a user picks up the dumbbell from the dumbbell base, the dumbbell is lifted to make the abutting bumps separate from the inserting holes formed at the limiting mechanisms, thus locking the limiting mechanisms; otherwise, the abutting bumps need to extend into the inserting holes to unlock the limiting mechanisms; therefore, the dumbbell is placed on the dumbbell base for unlocking, the hidden danger of accident unlocking of the limiting mechanisms due to improper use of the dumbbell is effectively avoided.
Further, the limiting mechanism comprises: a limiting disk, wherein a large cut circular hole is formed at the middle of the limiting disk, and the large cut circular hole is fitted with the end face of the rotating shaft in a shape and size; the limiting disk rotates synchronously with the rotating shaft, the limiting disk is arranged at the outer side of the corresponding hollow inserting plate and sleeved on the rotating shaft, and a plurality of clamping notches are formed at an outer edge of the limiting disk; a hollow housing sleeved on the rotating shaft at an outer side of the limiting disk and spliced with the hollow inserting plate, wherein an inner side of the hollow housing comprises an annular cover plate, and an inner diameter of the annular cover plate is greater than an outer diameter of the limiting disk; the limiting disk is arranged at the interior, of the hollow housing, and the inserting hole is formed at a bottom of the periphery of the hollow housing; and a clamping block arranged at the interior of the hollow housing and fixedly connected to the interior of the hollow housing in a rotating shaft mode, wherein one end of the clamping block is spliced with one clamping, notch on the limiting disk to limit the rotation.
By adopting above structure, the rotation of the rotating shaft is limited by inserting the clamping block into the limiting disk fixed to the end part of the rotating shaft to lock the dumbbell plates, thus serving the clamping block as a bolt; the limiting disk is configured to limit the rotating shaft from rotating, and the rotation of the rotating shaft is simply and effectively limited through the structure of the limiting disk; during unlocking, the abutting bump on the dumbbell base pushes the clamping block to separate from limitation of the limiting disk, thus unlocking the limiting mechanism; starting and unlocking of the limiting mechanism can be completed through a simple structure, the operation is simple, and the use is convenient.
Further, the limiting mechanism further comprises: a leaf spring, wherein one end of the leaf spring abuts against the interior of the hollow housing, and the other end of the leaf spring abuts against a lateral side of the clamping block; and a transmission block arranged in the inserting hole, wherein an, upper end of the transmission block abuts against the other end of the clamping block, and a lower end of the transmission block penetrates through the inserting hole to abut against the abutting bump.
By adopting above structure, the clamping block is inserted into the limiting disk by arranging the leaf spring to release the locking, and then the rotating shaft can rotate; when the abutting bump extends into the inserting hole to conduct transmission on the transmission block and the clamping block, the clamping block is separated from the limiting disk to unlock the limiting mechanism, and when the abutting bump is separated from the inserting hole, the clamping block is inserted into the limiting disk under the action of the leaf spring, thus limiting the rotating shaft from rotating.
Further, a plurality of connecting components are symmetrically arranged at two sides of the handle tube along an axis, and the plurality of connecting components are spirally arranged from the middle of the rotating shaft to the two ends of the rotating shaft at equal angles along the axis.
Further, each connecting component comprises a flat groove and a connecting portion, the flat groove corresponds to the connecting portion on the same shaft section, and the dumbbell plate is clamped to the connecting portion.
By adopting above structure, through the fitting of the flat grooves and the connecting portions arranged on the rotating shaft, corresponding dumbbell plates are sequentially locked from inside to outside, the step for adding the dumbbell plate is simplified, and the structure is more compact and more convenient.
Further, a plurality of positioning holes are formed at a disk body of each limiting disk at equal diameters and equal angles, and arrangement angles of the positioning holes correspond to spiral arrangement angles of the connecting components of the rotating shaft.
By adopting above structure, by making various positioning holes correspond to the dumbbell plates at the corresponding positions, the change of various assembling forms of the dumbbell plates is more concise, the frequency of repeatedly rotating the rotating shaft is effectively reduced, and the situation that other fixed dumbbell plates are affected during the assembling of the dumbbell plate.
Further, spring mounting holes are formed in the hollow housing, a spring is arranged in the spring, mounting hole, one end of the spring abuts against the hole bottom of the corresponding spring mounting hole, and the other end of the spring is installed with balls; the balls are pressed on the positioning holes through an elastic action of the springs, and the balls are fitted with the positioning holes in positions and size; when the rotating shaft rotates to drive the limiting disk to rotate, the balls slide on an outer side surface of the limiting disk in an arc line mode, and the balls are sequentially buckled to the plurality of positioning holes.
By adopting above structure, a plurality of gears are formed by the positioning holes on the limiting disk and the balls under an acting force of the springs; when the rotating shaft is rotated to assemble the dumbbell plate, whether a rotating angle of the rotating shaft is suitable for assembling the dumbbell plate can be obtained more accurately by buckling the balls to the corresponding positioning holes, and the damage caused by inconsistency of the rotating angle of the rotating shaft and the angle where the dumbbell plate can be assembled is effectively avoided.
Further, the hollow inserting plate comprises a sleeve and baffles arranged at two ends of the sleeve; a plurality of spacers are equidistantly arranged at an outer side of the sleeve along an axial direction, and a space between the baffles at the two ends are partitioned into a plurality of partition areas for placing the dumbbell plates by the plurality of spacers, and the open groove corresponds to the positions of the connecting components of the rotating shaft.
By adopting above structure, various dumbbell plates are uniformly separated through the hollow inserting plate, and the various dumbbell plates can be accurately assembled into the partition areas of the corresponding hollow inserting plate, thus effectively avoiding the situation that the dumbbell plates cannot be fixed by the rotating shaft due to assembling dislocation of the dumbbell plates.
Further, the clamping notches comprise rotary limiting grooves for clamping one end of the clamping block, the limiting disk comprises a first cambered surface, and the rotary limiting grooves are arranged at a cambered outer edge of the first cambered surface.
Further, the limiting disk further comprises a second cambered surface, and the second cambered surface and the first cambered surface are concentric and unequal-diameter arc.
Further, the clamping notches further comprise stall limiting grooves for limiting rotation of the clamping block, and the stall limiting grooves are arranged at an outer edge of a cambered surface connecting side of the first cambered surface and the second cambered surface.
Further, a radius of curvature of the second cambered surface is greater than a radius of curvature of the first cambered surface.
By adopting above structure, the rotating shaft is limited at a corresponding position through, the fitting of various rotary limiting grooves and the clamping block, thus achieving the locking of the dumbbell plates; the stall limiting grooves can prevent a situation that the rotating shaft rotates a whole circle again to make the limiting structure on the rotating shaft reset to unlock the locked dumbbell plate after the dumbbell plate is mounted, thus avoiding the falling of the assembled dumbbell plate caused by rotation.
Further, partition grooves for placing the dumbbell plates are formed in the dumbbell base, and the number of the partition grooves is consistent with the number of the dumbbell plates.
By adopting above structure, when the dumbbell plate is placed on the dumbbell base, a placing position of the dumbbell can be determined through the partition grooves, and then the abutting bump can accurately extend into the inserting to facilitate the unlocking of the limiting mechanism.
Further, the rotating shaft is further sleeved with rotary end covers, the rotary end covers are arranged at the outer sides of the hollow housings and fixedly connected to the rotating shaft; a large cut circular groove fitted with the end face of the rotating shaft in shape is arranged at an inner side of each rotary end cover, and the rotary end covers rotate synchronously with the rotating shaft.
By adopting above structure, on the one hand, the rotary end cover is used as a device for driving the rotating shaft to rotate, on the other hand, the rotary end cover can effectively limit the hollow housing from sliding out of the rotating shaft in the rotating process; a weight display dial plate is marked on an outer side surface of an end cover of the rotary end cover, and different dumbbell weights are displayed by a numeric keyboard when different dumbbell plates are assembled and disassembled.
Compared with the prior art, the present invention has the beneficial effects that:
a weight-adjustable dumbbell of above technical solution is adopted, dumbbell plates are fixed into a hollow inserting plate through the control of a limiting mechanism to rotation of a rotating shaft, and a part for unlocking the limiting mechanism is arranged on a dumbbell base; when the dumbbell is picked up, the limiting mechanism can be started to limit the rotation of the rotating shaft, thus locking the dumbbell plates in the hollow inserting plate, and unnecessary risks caused by loosening and even falling of the dumbbell plates unlocked by the limiting mechanisms due to excessively aggressive training or improper operation in training operation using the dumbbell are effectively avoided; and the weight of the dumbbell can be easily adjusted on the base, the structure is concise, the process for machining and assembling is convenient, and material cost and manpower cost, are saved.
In accordance with the technical solution provided by the present invention, the assembling difficulty is lowered, the time for assembling and the time for disassembling are greatly reduced, and the cost is saved.
The accompanying drawings constituting a part of the present application are used to provide further understanding to the present invention, illustrative embodiments of the present invention and the description thereof are used to explain the present invention, and do not constitute an undue limitation to the present invention. wherein:
Reference numerals are as follows:
The present invention is described in detail below with reference to accompanying drawings and in conjunction with embodiments. Various examples are provided by way of an explanation of the present invention and do not limit the invention. In actual, the person skilled in the art would clear that modifications and variations may be made to the present invention without departing from scope or spirit of the present invention. For example, features illustrated or described as a part of one embodiment may be used for mother embodiment to generate still further embodiment. Hence, it is expected that the present invention comprises such modifications and variations as fall within the scope of the appended claims and their equivalents.
In the description of the present invention, azimuthal or positional relationships indicated by the terms “longitudinal,” “transverse,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” and the like are the based on the azimuthal or positional relationships shown in the drawings, which are merely for ease of description of the present invention rather than requiring the present invention to be constructed and operated in a particular orientation, and thus are not to be construed as a limitation to the present invention. The terms “connected”, “connection”, and “arrangement” used in the present invention should be understood broadly, for example, either fixedly connection or detachable connection; either direct connection or indirect connection through an intermediate part; either wired electrical connection or a radio connection, or wireless communication signal connection, the specific meanings of which may be understood by those of ordinary skill in the art on a case-by-case basis.
One or various examples of the present invention are illustrated in the accompanying drawings. Features in the accompanying drawings are denoted by numerical and letter symbols in the detailed description. The similar or like symbols in the accompanying drawings and descriptions have been used to denote similar or like parts of the present invention. As used herein, the words “first”, “second”, “third” and the like can be used interchangeably to distinguish one member from another and are not intended to indicate the location or importance of separate members.
As shown from
The rotating shaft 11 is further sleeved with a pair of limiting mechanisms 4 for limiting the rotating shaft 11 from rotating, the limiting mechanisms 4 are arranged on the rotating shaft 11 at outer sides of the two hollow inserting plates 13; each limiting mechanism 4 comprises a limiting disk 42, a hollow housing 41, a clamping block 45 arranged in the hollow housing 41, a leaf, spring 44, and a transmission block 46; inserting holes 49 communicated with the limiting mechanisms of the hollow housings 41 are formed at bottom surfaces of the periphery of the hollow housings 41, and abutting bumps 32 fitted with the inserting holes 49 at positions are arranged at two ends of the dumbbell base 3; the limiting mechanisms 4 are unlocked when the abutting bumps 32 extend into the inserting holes 49, and the abutting bumps 32 abut against the transmission blocks 46.
Various dumbbell plates 2 are sequentially assembled on and disassembled from the hollow inserting plates 13 through the rotation of the rotating shaft 11; the limiting mechanisms 4 are locked when the abutting bumps 32 are separated from the inserting holes 49, and relative rotation of the rotating shaft 11 is limited by the limiting mechanisms 4. The limiting mechanism 4 comprises a pair of limiting disks 42 respectively sleeved at two sides of the hollow inserting plate 13; a large cut circular hole 420 is formed in the middle of the limiting disk 42, and the large cut circular hole 420 is fitted with an end face of the rotating shaft 11 in shapes and size; under an unlocking state, the limiting disks 42 rotate synchronously with the rotating shaft 11 in clockwise or counterclockwise, and the limiting disks 42 are arranged at the outer sides of the hollow inserting plate 13 and sleeved on the rotating shaft 11.
The hollow housing 41 is sleeved on the rotating shaft 11 at the outer side of the limiting disk 42 and is spliced with the inserting plate 13; the rotating shaft 11 is further sleeved with rotary end covers 5, and, the rotary end covers 5 are arranged at outer sides of the hollow housings 41 and fixedly connected to the rotating shaft 11. An inner side of the hollow housing 41 comprises an annular cover plate 40, an inner diameter of the annular cover plate 40 is greater than an outer diameter of the limiting disk 42; the limiting disk 42 is arranged in the hollow housing 41 at the inner side of the annular cover plate 40, an annular plate at the inner side of the annular cover plate 40 is spliced with and fixed to an inner annular plate at the outer side of the hollow inserting plate 13, the hollow inserting plate 13 rotates synchronously with the hollow housing 41, and a plurality of clamping notches are formed at an outer edge of the limiting disk 42; the clamping notches comprise three rotary limiting grooves 421 for clamping one end of the clamping block; the limiting disk 42 comprises a first cambered surface 424, the rotary limiting grooves 421 are arranged at a cambered outer edge of the first cambered surface 424; the limiting disk 42 further comprises a second cambered surface 425, and the second cambered surface 425 and the first cambered surface 424 are concentric and unequal-diameter are surfaces; the clamping notches further comprise two stall limiting grooves 422 for limiting the rotary clamping block, the stall limiting grooves 422 are respectively arranged at an outer edge of a cambered surface connecting side of the first cambered surface 424 and the second cambered surface 425; and a radius of curvature of the second cambered surface 425 is greater than a radius of curvature of the first cambered surface 424. The inserting hole 49 is formed at a bottom of the periphery of the hollowing housing 41 and corresponds to the abutting bump 32 on the dumbbell base 3; the clamping block is arranged at the interior of the hollow housing 41 and fixedly connected to the interior of the hollow housing 41 in a rotating shaft mode; an inner diameter of the annular cover plate 40 is greater than an outer diameter of the limiting disk 42, the limiting disk 42 enters the interior of the hollow housing 41, and one end of the clamping block is spliced with the clamping notch on the limiting disk 42 to limit the rotation. The limiting mechanism 4 further comprises a leaf spring 44, one end of the leaf spring 44 abuts against the interior of the hollow housing 41, the other end of the leaf spring 44 abuts against a lateral side of the clamping block 45; the transmission block 46 is arranged in the inserting hole 49, an upper end of the transmission block 46 abuts against the other end of the clamping block 45; and the abutting bump 32 is inserted into the inserting hole 49 at a lower end of the transmission block 46 to abut against the transmission block 46. Two ends of the rotating shaft 11 are provided with threaded holes, the rotary end covers 5 are fixed to the two ends of the rotating shaft 11 by screws, and an inner side of the rotary end cover 5 is provided with a large cut circular groove fitted with an end face of the rotating shaft 11 in shape; the rotary end covers 5 rotate synchronously with the rotating shaft 11; a weight display dial plate is marked on an outer side surface of an end cover of the rotary end cover 5, and different dumbbell weights are displayed by a numeric keyboard when different dumbbell plates are assembled and disassembled; a plurality of anti-skid grooves are formed at an outer edge of the rotary end cover 5 along a circumferential direction, which can increase a friction force of the rotary end cover 5, meanwhile, the rotary end cover can be fitted with the anti-skidding grooves through a tool to rotate.
Three pairs of positioning holes 423 are formed at a disk body of the limiting disk 42 at equal diameters and equal angles, one pair of positioning holes 423 is symmetrically formed along a diameter of the limiting disk 42, and an arrangement angle of the pair of positioning holes 423 corresponds to a spiral arrangement angle of the connecting components of the rotating shaft 11. Two spring mounting holes 411 are formed in the hollow housing 41, a connecting line of the circle centers of the two spring mounting holes 411 is consistent with a diameter distance of the opposite positioning holes 423, and a spring 47 is arranged in the spring mounting holes 411, one end of the spring 47 abuts against the hole bottom of the spring mounting hole 411, and the other end of the spring 47 is installed with balls 48; the balls 48 are pressed on the positioning holes 423 through an elastic action of the springs 47, rolling tracks of the balls 48 correspond to distribution positions of the positioning holes 423, and the balls 48 are fitted with the positioning holes 423 in size. When the rotating shaft 11 rotates to drive the limiting disk 42 to rotate, the balls 48 relatively slide on an outer side surface of the limiting disk 42 along an arc line, and the balls 48 are sequentially buckled to the plurality of positioning holes 423. The balls 48 are configured to slide on the limiting disk 42 for positioning through the springs 47, thus a user can be prompted whether the rotating shaft 11 completely mounts and positions the dumbbell plates 2 on the hollow inserting plate 13 or not, the balls 48 are buckled with the positioning holes 423 once, then the mounting of a pair of dumbbell plates 2 are completed correspondingly. The hollow inserting plate 13 comprises a sleeve 132 and baffles 133 arranged at two ends of the sleeve 132, a plurality of spacers 134 are equidistantly arranged at an outer side of the sleeve 132 along an axial direction, and a space between the baffles 133 at the two ends are partitioned into a plurality of partition areas for placing the dumbbell plates 2 by the plurality of spacers 134, and the open grooves 131 correspond to the positions of the connecting components of the rotating shaft 11.
When the dumbbell plates 2 are assembled on the dumbbell bar, assembly 1, partition grooves 31 for placing the dumbbell plates 2 are formed in the dumbbell base 3, the number of the partition grooves 31 is consistent with the number of the dumbbell plates 2, and a width of each partition groove 31 is the same as a width of the dumbbell plate partition area of the hollow inserting plate 13 and is fitted with the width of the dumbbell plate 2. At first, the dumbbell plates 2 are sequentially placed in the partition grooves 31 of the dumbbell base 3, a vertical insertion angle of an inserting plate is adjusted through a hollow inserting plate 13 of the dumbbell bar assembly 1, meanwhile, a tangent plane of a large cut circle of the rotating shaft 11 is relatively rotated to positions of the open grooves 131, the partition grooves 31 of the hollow inserting plate 13 are aligned with dumbbell plate insertion openings 21 of the dumbbell plates 2 to be vertically and downwards inserted; when the rotating shaft 11 corresponds to the rotating shaft connecting groove 22, the transmission block 46 arranged at the bottom of the periphery of the hollow housing 41 is pushed into the hollow housing 41 from the inserting hole 49 by the abutting bump 32, and an unlocking state is achieved at the moment; the transmission block 46 jacks up the other end of clamping block 45 fixed into the hollow housing 41, the transmission block 46 pushes the clamping block 45 to rotate around a screw rod, due to the fact that a lateral side of the clamping block 45 abuts against the leaf spring 44, the leaf spring 44 is in a compressed state, one end of the clamping block 45, which is inserted into the stall limiting groove 422 of the limiting disk 42, pops downwards, the limiting disk 42 is separated from the clamping block 45, and an unlocking state is achieved at the moment.
When conducting a dumbbell plate assembling operation, the rotating shaft 11 rotates synchronously with the limiting disk 42 in clockwise, various connecting portions 112 on the rotating shaft 11 are clamped to the rotating shaft connecting grooves 22 of various dumbbell plates 2, and the dumbbell plates 2 are sequentially clamped from two sides to the middle of the dumbbell bar assembly 1; and the arrangement angle of the positioning holes 423 is the same as the spiral distribution angle of the connecting portions 112. The balls 48 are sequentially buckled to the positioning holes 423 on the limiting disk 42 along with the rotation of the rotating shaft 11, the balls 48 and the positioning holes 423 slide in counterclockwise with respect to the limiting disks 42 to be buckled to the next pair of positioning holes 423; when the balls 48 relatively rotate or slide to the next pair of positioning holes 423, the connecting components on the rotating shaft 11 rotate therewith, and a pair of corresponding dumbbell plates 2 are clamped and assembled to the corresponding connecting portions 112 at two sides of the rotating shaft 11. The user can accurately position one clamping end of the clamping block 45 and the limiting groove 141, thus accurately controlling the number of connected dumbbell plates 2.
The dumbbell bar assembly 1 and the assembled dumbbell plates 2 are separated from the dumbbell base 3, the dumbbell plates 2 are separated from the dumbbell base 3, the leaf spring 44 rebounds and resets to make one end of the clamping block be recovered to be spliced with the clamping notch of the limiting disk 42, the other end of the clamping block enables the transmission block 46 to be inserted into the inserting hole 49 and flush with the inserting hole 49, the hollow housing 41 is fixedly clamped to the hollow inserting plate 13, the hollow inserting plate 13 is kept vertically downward due to an action of gravity, the rotating shaft 11 and the hollow inserting plate 13 stop, rotating relatively, and after a splicing assembly operation of the rotating shaft 11 and the dumbbell plates 2 is completed, the limiting disk 42 and the rotating shaft 11 are in a locked state in a relatively rest manner relative to the hollow housing 41.
When the dumbbell plates 2 are disassembled, the dumbbell bar assembly 1 and the assembled dumbbell plates 2 are placed into the partition grooves 31 in the dumbbell base 3, the dumbbell plates 2 are aligned with corresponding partition grooves 31, the inserting hole 49 of the hollow housing 41 of the dumbbell bar assembly 1 corresponds to the abutting bump 32 in the dumbbell base 3, the abutting bump 32 jacks up the transmission block 46, the transmission block 46 jacks up the other end of the clamping block fixed into the hollow housing 41, the clamping block 45 rotates around the screw rod, the lateral side of the clamping block 45 abuts against the leaf spring 44, the leaf spring 44 is in a compressed state, one end, inserted into the stall limiting groove 422 of the limiting disk 42, of the clamping block 45 pops downwards, the limiting disk 42 is separated from the clamping block 45, and an unlocking state is achieved at the moment; when a dumbbell plate disassembling operation is conducted, the rotating shaft 11 and the limiting disk 42 can rotate anticlockwise with respect to each other, the disassembling is conducted when the flat grooves 111 in the rotating shaft 11 correspond to the rotating shaft connecting grooves 22 of the dumbbell plates 2 by rotation, and the dumbbell plates 2 are sequentially separated from the hollow inserting plate 13 from the middle to the two ends.
It can be seen from above description that the embodiments of the present invention achieve the following technical effects:
1. the number of dumbbell plates can be quickly adjusted on a dumbbell base by rotating a dumbbell rotating shaft, thus adjusting the weight of the dumbbell;
2. unlocking parts of limiting mechanisms are arranged on the dumbbell base, a locking state or a rotary state of the rotating shaft can be instantly switched when the dumbbell is picked up or placed; through mutual locking of the mounted hollow inserting plate and the dumbbell rotating shaft, it is ensured that the rotating shaft cannot rotate when the dumbbell is picked up, and the risk that the dumbbell plates fall off is avoided; and
3. a user can accurately control the number of connected dumbbell plates through a torque transferred to the hand when the balls are relatively rolled to be buckled to positioning, holes.
The above is only preferred embodiments of the present invention and are not used to limit the present invention, and for those skilled in the part, various changes and variations may be made to the present invention. Any modifications, equivalents, improvements and the like made within the spirit and, principles of the present invention should be encompassed within the scope of the present invention.
