A type of dumbbell

Abstract

This utility model discloses a dumbbell, including a handle, a base, and multiple counterweights disposed on the base. The handle includes a rotating cylinder and a telescopic rod for threading through the counterweights. A spring block is movably disposed on the base, and an elastic structure is disposed within the base for the spring block to abut against the outer counterweights. This utility model, by providing a flexibly movable spring block on the base, provides an inward pushing force on the outer sides of the multiple counterweights, ensuring that the counterweights remain vertical and tightly stacked, effectively preventing tilting of the counterweights, allowing for smooth threading of the telescopic rod, and guaranteeing a better user experience.

Description

Technical Field

[0001] This utility model belongs to the field of fitness equipment technology and relates to a dumbbell. Background Technology

[0002] The retractable dumbbell assembly of any weight, referencing the dumbbell disclosed in patent CN112587858B, uses a linear drive mechanism to control the telescopic rod to pass through any number of dumbbell plates, achieving rapid configuration of the entire dumbbell weight. However, this type of dumbbell still has a drawback affecting user experience. Multiple dumbbell plates need to be stacked vertically and equidistantly to ensure the telescopic rod can smoothly pass through the center of the plates. However, the support in the relevant solution lacks a support and limiting structure for the dumbbell plates. When there is a gap between the dumbbell plates and the support, especially when the number of dumbbell plates on the support is reduced, the dumbbell plates are prone to tilting, causing interference during telescopic rod movement and affecting user experience. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a dumbbell.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A dumbbell includes a handle, a base, and a plurality of counterweights disposed on the base. The handle includes a rotating cylinder and a telescopic rod for passing through the counterweights. A spring block is movably disposed on the base, and an elastic structure is disposed within the base for the spring block to abut against the counterweights on the outside.

[0006] Furthermore, the base is provided with an open compartment, the spring block passes through the open compartment, and the elastic structure includes a connecting post provided on the spring block, a compression spring sleeved on the connecting post, and the two ends of the compression spring are respectively connected to the spring block and the open compartment.

[0007] Furthermore, it also includes a limiting bolt. The inner wall of the open chamber is provided with a limiting hole for the limiting bolt to pass through. The head of the limiting bolt is located on one side of the limiting hole, and the rod is located on the other side of the limiting hole and is threadedly connected to the connecting column.

[0008] Furthermore, the counterweight adjustment mechanism includes a geared disc and a turntable coaxially arranged with the rotating drum. The turntable is fixedly connected to the rotating drum. A drive wheel is arranged circumferentially on the turntable. Multiple grooves are spirally distributed on the end face of the geared disc. The grooves are equally divided circumferentially to form multiple sequentially spaced first-direction sub-tracks and second-direction sub-tracks. The first-direction sub-tracks are arranged circumferentially on the geared disc. The second-direction sub-tracks are inclined at a set angle relative to the first-direction sub-tracks along the radial direction of the geared disc. The telescopic rod is provided with multiple toothed grooves arranged in an axial array. The drive wheel simultaneously meshes with the grooves and the toothed grooves.

[0009] Furthermore, a limiting ball is fixedly installed on the turntable. The limiting ball includes a sleeve and a ball head. A spring is provided inside the sleeve for the ball head to abut against the opening of the sleeve. Multiple stop grooves are arranged in a circumferential ring on the end face of the gear plate. During the rotation of the turntable, the ball head and the stop groove tend to cooperate with each other.

[0010] Furthermore, it also includes a counting component, which includes a counting ring, a planetary gear set, an internal gear ring, and a counting gear. The counting gear is coaxially disposed on the turntable, the counting ring is coaxially sleeved on the outer circumference of the turntable, the planetary gear set is disposed circumferentially on the counting ring, the internal gear ring is fixedly disposed, and the inner and outer sides of the planetary gear set mesh with the counting gear and the internal gear ring, respectively. The outer circumference of the counting ring is provided with a weight mark.

[0011] Furthermore, it also includes a locking disc, which is disposed on the outer periphery of the turntable. The outer periphery of the turntable is provided with ring teeth, and the inner periphery of the locking disc is provided with anti-rotation teeth. The locking disc is provided with a top spring for driving the anti-rotation teeth to mesh with the ring teeth.

[0012] Furthermore, it also includes a locking block. The counterweight plate has a disc-shaped structure with a set thickness. The center of the counterweight plate is provided with a through hole for the telescopic rod to pass through. The outer periphery of the counterweight plate is provided with a notch for inserting the locking block. The locking block is connected to two adjacent counterweight plates.

[0013] Furthermore, the counterweight plate has notches at its top and bottom, and the inner wall of the notch is recessed to form a slot for inserting the lock block. A pin passes through the slot, and the outer periphery of the lock block has a semi-circular opening for engaging with the outer periphery of the pin. The lock block has a slot and a plate, and the slot and plate engage with adjacent plates and slots respectively.

[0014] Furthermore, the counterweight adjustment mechanism also includes an end plate and a housing. The end plate and the housing are fixedly connected and form a cavity for accommodating the turntable. The outer end face of the end plate is connected to the counterweight plate, and the gear plate is fixedly connected to the inner end face of the end plate. The rotating cylinder passes through the housing and the end plate. The outer circumference of the drive wheel is configured with spherical teeth, and the rotation direction plane of the drive wheel coincides with the axis of the rotating cylinder. A through groove for the drive wheel to pass through is provided on the outer wall of the rotating cylinder. It also includes a counting assembly, which includes a counting ring, a planetary gear set, an internal gear ring, and a counting gear. The counting gear is coaxially disposed on the turntable, the counting ring is coaxially sleeved on the outer circumference of the turntable, the planetary gear set is disposed circumferentially on the counting ring, and the internal gear ring is disposed on the inner circumference of the housing. The inner and outer sides of the planetary gear set mesh with the counting gear and the internal gear ring, respectively. The system includes a counterweight half-plate located on the lower side of the housing, with a hook positioned at the center of the half-plate. An opening at the bottom of the housing allows the hook to pass upwards. Multiple flanges are arranged in a circular array around the outer periphery of the turntable, with the flanges positioned directly below the hook at a predetermined rotation position. A locking disc is also included, located on the outer periphery of the turntable and equipped with a top spring. The top spring's two ends are connected to the locking disc and the end plate, respectively. A top block is provided on the base to abut against the locking disc in the vertical direction. Multiple drive wheels are arranged in a circular array around the axis of the rotating drum. An inclined surface is provided on the top of the spring block.

[0015] In summary, the advantages of this utility model are as follows:

[0016] This invention provides an inward pushing force on the outside of multiple counterweight plates by setting a flexible movable block on the base, so that the counterweight plates can remain vertical and stacked tightly, effectively preventing the counterweight plates from tilting, allowing the telescopic rod to be smoothly inserted, and ensuring user experience. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the dumbbell and base of this utility model.

[0018] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure.

[0019] Figure 3 This is a schematic diagram of a portion of the internal structure of the counterweight adjustment mechanism in this utility model.

[0020] Figure 4 for Figure 3A schematic diagram of the explosion structure.

[0021] Figure 5 for Figure 4 Schematic diagrams of the explosion structure in some other embodiments.

[0022] Figure 6 for Figure 3 A schematic diagram of the explosion structure from another perspective.

[0023] Figure 7 for Figure 6 Schematic diagrams of the explosion structure in some other embodiments.

[0024] Figure 8 This is a schematic diagram of the structure of the turntable and locking disc in this utility model.

[0025] Figure 9 This is a schematic diagram of the meshing structure of the drive wheel, the gear disc, and the telescopic rod in this utility model.

[0026] Figure 10 for Figure 9 Schematic diagrams of other embodiments.

[0027] Figure 11 for Figure 9 A schematic diagram of the gear disc structure.

[0028] Figure 12 for Figure 10 A schematic diagram of the gear disc structure.

[0029] Figure 13 This is a schematic diagram of the structure of the turntable and drive wheel in this utility model.

[0030] Figure 14 for Figure 13 Schematic diagrams of other embodiments.

[0031] Figure 15 This is a schematic diagram of the base structure in this utility model.

[0032] Figure 16 This is a cross-sectional structural diagram of the elastic support assembly.

[0033] The diagram shows the following components: 11. Rotary drum; 111. Through groove; 12. Telescopic rod; 121. Gear groove; 21. Outer shell; 22. End plate; 23. Turntable; 231. Counting gear; 232. Ring gear; 233. Flange; 234. Limiting ball; 24. Drive wheel; 25. Gear disc; 251. First direction sub-rail; 252. Second direction sub-rail; 253. Gear slot; 26. Locking disc; 261. Top spring; 262. Anti-rotation tooth. 27. Counting ring; 271. Planetary gear set; 28. Counterweight half piece; 281. Hook; 3. Counterweight piece; 31. Through hole; 32. Notch; 331. First locking block; 332. Second locking block; 4. Base; 41. Groove; 42. Top block; 43. Elastic support assembly; 431. Opening compartment; 4311. Limiting hole; 432. Spring block; 4321. Inclined surface; 433. Limiting bolt; 434. Threaded part; 435. Compression spring. Detailed Implementation

[0034] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0035] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0036] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0037] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of this utility model may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0038] This embodiment provides a dumbbell, as shown in the reference. Figure 1 As shown, it includes a handle and counterweights 3 located on both sides of the handle, as well as a counterweight adjustment mechanism that enables the handle to be fixedly connected to any set number of counterweights 3.

[0039] Specifically, refer to Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The handle includes a rotating cylinder 11 and a telescopic rod 12. The rotating cylinder 11 has a hollow straight tubular structure and knurling on its outer circumference for anti-slip purposes. The telescopic rod 12 is inserted into the rotating cylinder 11 along its axial direction. The telescopic rod 12 and the rotating cylinder 11 are in clearance fit, so that the telescopic rod 12 can rotate and move axially relative to the rotating cylinder 11. There are two telescopic rods 12, which are symmetrically arranged on both sides of the rotating cylinder 11 along its axial direction.

[0040] The counterweight plate 3 has a disc-shaped structure with a set thickness. Its outer shape includes, but is not limited to, circles, squares, polygons, etc. Multiple sets of counterweight plates 3 are arranged in a stacked manner along the axial direction of the rotating cylinder 11. Multiple sets of counterweight plates 3 are respectively arranged at both ends of the axial direction of the rotating cylinder 11. A through hole 31 is opened in the middle of the counterweight plate 3. When the counterweight plate 3 is set, the through hole 31 is located on the axis of the rotating cylinder 11, so that the telescopic rod 12 can pass through the through hole 31 when it moves axially.

[0041] The counterweight adjustment mechanism is set in two sets, located at both ends of the axial direction of the rotating drum 11, respectively, to connect the two sets of counterweight plates 3 on both sides of the rotating drum 11 to the two ends of the rotating drum 11. The counterweight adjustment mechanism includes an end plate 22 and a housing 21. The end plate 22 is fixedly connected to the housing 21, forming a cavity inside. The rotating drum 11 passes through the housing 21 and the end plate 22 in sequence along its axial direction, so that the rotating drum 11 passes through the cavity at the same time. The rotating drum 11 can rotate relative to the housing 21, and at the same time, the rotating drum 11 can also rotate relative to the end plate 22. The outer end face of the end plate 22 abuts against the nearest counterweight plate 3 on its corresponding side.

[0042] You can also refer to Figure 7 , Figure 8 , Figure 10 , Figure 11 , Figure 14 and Figure 15The counterweight adjustment mechanism also includes a turntable 23, a drive wheel 24, and a gear disc 25 disposed in the cavity. The gear disc 25 is fixedly disposed on the inner end face of the end plate 22, and is coaxial with the inner end face and has a through-hole for the rotating drum 11 or the telescopic rod 12 to pass through. The turntable 23 is coaxially sleeved on the outer circumference of the rotating drum 11. The turntable 23 and the rotating drum 11 are fixedly connected to prevent rotation through splines or other means, so that when the rotating drum 11 rotates, it synchronously drives the turntable 23 to rotate. Multiple drive wheels 24 are disposed on the radial side of the outer circumference of the rotating drum 11. The axis of the drive wheel 24 is perpendicular to the axis of the rotating drum 11. More specifically, the plane of rotation of the drive wheel 24 coincides with the axis of the rotating drum 11. The turntable 23 is provided with a slot for the axle of the drive wheel 24 to be engaged in the slot. When the turntable 23 rotates, it synchronously drives the drive wheel 24 to rotate around the axis of the rotating drum 11.

[0043] In some preferred embodiments, the number of drive wheels 24 is set to three or two, and the drive wheels 24 are distributed in a circular array around the axis of the rotating drum 11 to improve the stability of the drive transmission of the drive wheels 24.

[0044] Reference Figure 10 , Figure 11 , Figure 12 and Figure 13 The outer periphery of the drive wheel 24 is configured with a spherical tooth structure. Multiple grooves are arranged sequentially along the circumference on the end face of the toothed disk 25 to form a vortex shape. One or more spherical teeth on the drive wheel 24 form a spherical fit with the multiple grooves. When the drive wheel 24 rotates, the grooves become a track for the spherical teeth to move along the circumference of the toothed disk 25. The track has a first direction and a second direction when it is arranged along the circumference of the toothed disk 25. In this embodiment, the track is divided into multiple parts by the circumferential annular array of the toothed disk 25, including multiple first direction sub-tracks 251 and multiple second direction sub-tracks 252. The first direction sub-tracks 251 and the second direction sub-tracks 252 are connected and arranged sequentially at intervals. The first direction sub-tracks 251 are in the same direction as the circumference of the toothed disk 25. The second direction sub-tracks 252 are inclined outward along the radial direction of the toothed disk 25 relative to the first direction sub-tracks 251. Preferably, there are three first direction sub-tracks 251 and three second direction sub-tracks 252.

[0045] The spherical teeth form a spherical fit with the track. When the drive wheel 24 rotates, the spherical teeth move circumferentially along the track. When the drive wheel 24 moves completely along any first direction track, the drive wheel 24 does not rotate. When the drive wheel 24 moves completely along any second direction track, the drive wheel 24 rotates by a set angle.

[0046] There is no special corresponding relationship between the number of drive wheels 24 and the number of grooves. It is only required that at the same time, multiple drive wheels 24 are respectively engaged at the same position on multiple first direction sub-tracks 251, or respectively engaged at the same position on multiple second direction sub-tracks 252.

[0047] A through groove 111 is provided on the outer wall of the rotating cylinder 11, and the through groove 111 is connected to the inner side of the rotating cylinder 11. Multiple sets of tooth rows are provided on the outer periphery of the telescopic rod 12. The tooth rows include multiple tooth grooves 121 arranged in an array along the axial direction of the telescopic rod 12. Specifically, the multiple sets of tooth rows are distributed in a circumferential array along the telescopic rod 12, and are used to mesh with multiple drive wheels 24 respectively. Part of the drive wheel 24 passes through the through groove 111, so that the spherical teeth and the tooth grooves 121 form a spherical fit. When the drive wheel 24 rotates, the drive wheel 24 drives the telescopic rod 12 to move axially.

[0048] When setting the weights for the dumbbells, firstly, multiple sets of weight plates 3 are set on both sides of the handle. Preferably, the number of weight plates 3 on both sides of the handle is the same. The user holds the rotating drum 11 and directly drives it to rotate, which drives the rotating disk 23 and the drive wheel 24 to rotate. Furthermore, the rotation of the drive wheel 24 driven by the gear disk 25 drives the telescopic rod 12 to move and extend. By rotating the rotating drum 11 at a set angle, the telescopic rod 12 extends to a set length. The telescopic rod 12 passes through multiple sets of weight plates 3 axially, thereby forming vertical contact support for the passed weight plates 3, so that the dumbbell can be lifted and used.

[0049] To provide users with a clear visual representation of the applied weight, the counterweight adjustment mechanism also includes a counting component, as shown in the reference... Figure 1 , Figure 4 , Figure 7 and Figure 8 The counting component includes a counting ring 27, a planetary gear set 271, and a counting gear 231. The counting gear 231 is coaxially and fixedly connected to the turntable 23. The planetary gear set 271 is radially arranged on the outer periphery of the rotating cylinder 11. In this embodiment, the planetary gear set 271 preferably includes multiple planetary gears, which are arranged in a ring array around the rotating cylinder 11. An internal gear ring is provided on the inner periphery of the outer shell 21. The outer sides of the planetary gears mesh with the internal gear ring, and the inner sides mesh with the counting gear 231. Therefore, when the rotation of the rotating cylinder 11 drives the turntable 23 and the counting gear 231 to rotate, it will drive the planetary gears to rotate.

[0050] The counting ring 27 is coaxially fitted around the outer circumference of the rotating cylinder 11 and can rotate relative to it. One axial end of the central shaft of the planetary gear passes through the counting ring 27. Therefore, when the planetary gear rotates, it will also drive the counting ring 27 to rotate synchronously. The counting ring 27 has multiple weight marks arranged in sequence along the circumference on its outer surface. Specifically, they are kilogram symbols. Each kilogram symbol corresponds to different counterweight information. A viewing window is provided at the top of the outer casing 21, through which the user can observe the kilogram symbol at the current position.

[0051] Furthermore, multiple hemispherical stop grooves are arranged in a circumferential annular array on the end face of the gear disk 25. Multiple limiting beads 234 are arranged in a circumferential annular array on the turntable 23 relative to the end face of the gear disk 25. Each limiting bead 234 includes a sleeve and a ball head. One end of the sleeve is fixedly connected to the turntable 23, and the other end of the sleeve is an open structure. The ball head engages with the opening of the sleeve and can move into the sleeve. A spring is provided inside the sleeve to hold the ball head at the opening. The ball head faces the toothed disc 25 and abuts against the end face of the toothed disc 25, pressing the ball head into the sleeve. The circumference formed by the distribution of multiple limiting beads and the circumference formed by the distribution of multiple stop grooves have the same inner diameter. Therefore, when the turntable 23 rotates, the limiting beads 234 rotate along the end face of the toothed disc 25. During the rotation, any ball head will be opposite to any stop groove, causing the ball head to spring into the stop groove. As the turntable 23 continues to rotate, the ball head will disengage from the stop groove and re-engage with the next stop groove in the direction of movement.

[0052] In this preferred embodiment, the spacing between adjacent tooth grooves 121 in the toothed row is equal to the thickness of a single counterweight plate 3. Thus, when the telescopic rod 12 moves axially through the spacing of a pair of tooth grooves 121, the extension length of the telescopic rod 12 can carry an additional counterweight plate 3. At the same time, the drive wheel 24 can travel along the toothed disc 25 sequentially over the distance of an adjacent first direction sub-track 251 plus a second direction sub-track 252. The turntable 23 can rotate relative to the toothed disc 25 by an angle between two adjacent stop slots, so that the limiting ball 234 moves from one stop slot to the next stop slot to engage.

[0053] By setting up the counting component, when the user sets the counterweight 3 on the operating handle, the rotating drum 11 rotates, and the linked counting ring 27 rotates synchronously at the corresponding angle to display the current kilogram value symbol in real time on the window. Thus, the user can obtain the weight information of the counterweight 3 currently mounted on the handle by observing the window. In addition, during the operation, the action of the limiting ball 234 and the stop groove will also generate corresponding tactile feedback on the handle, allowing the user to perceive it.

[0054] To ensure the tight axial stacking of multiple sets of counterweight plates 3 and prevent the counterweight plates 3 from falling off during use, a locking block is also provided in this embodiment, as shown in the reference. Figure 1 , Figure 5 , Figure 6 The locking block includes a first locking block 331 and multiple second locking blocks 332, wherein the first locking block 331 is used for connecting the end plate 22 and the counterweight 3, and the second locking blocks 332 are used for connecting adjacent counterweights 3.

[0055] Specifically, the counterweight 3 has a crescent-shaped notch 32 on its circumference. In this embodiment, the top and bottom of the counterweight 3 are respectively provided with notches 32. The inner wall of the notch 32 is recessed and a slot is provided. A pin is inserted through the counterweight 3 along its axial direction. The pin passes through the slot. The second locking block 332 has a crescent-shaped structure. The second locking block 332 cooperates with the notch 32 of the counterweight 3 to make the counterweight 3 form a complete circle. An insert is provided on the outer wall of the second locking block 332. The insert has a semi-circular opening that cooperates with the outer periphery of the pin. The insert is inserted into the slot and, in conjunction with the limiting pin, achieves a tight fit between the second locking block 332 and the counterweight 3. The second locking block 332 is provided with a slot and a plate in sequence. When multiple sets of counterweights 3 are set, the slot on the current second locking block 332 is engaged with the plate of the second locking block 332 on the adjacent previous counterweight 3, and the plate on the current second locking block 332 is engaged with the slot on the second locking block 332 on the adjacent next counterweight 3, thus achieving a tight connection between multiple sets of counterweights 3.

[0056] The end plate 22 is also provided with a crescent-shaped notch 32 in the circumferential direction. One side of the first locking block 331 is inserted into the notch 32 and tightly fitted with the end plate 22. The other side is provided with a locking plate for inserting into the slot of the second locking block 332 on the nearest adjacent counterweight 3, so as to realize the tight fit between the counterweight 3 and the end plate 22.

[0057] To provide stable placement for the dumbbells and facilitate weight adjustment by the user, this embodiment also includes a base 4, as shown in the reference. Figure 1 and Figure 16 The handle and counterweight 3 are detachably placed on the base 4.

[0058] In order to ensure that the counterweights 3 are placed neatly and closely on the base 4, elastic support components 43 are provided on both sides of the base 4 to provide axial thrust to the counterweights 3 on both sides, so that the multiple counterweights 3 are arranged neatly.

[0059] The elastic support assembly 43 includes open compartments 431 respectively disposed on both sides of the base 4. An elastic structure is disposed in the open compartment 431, so that the spring block 432 and the open compartment 431 form a movable connection. The elastic structure includes a connecting post disposed along the axial direction of the counterweight 3 on the inner side of the spring block 432. A compression spring 435 is coaxially sleeved on the connecting post. When the spring block 432 is inserted into the open compartment 431, the spring block 432 and the open compartment 431 form a sliding fit, and the two ends of the compression spring 435 abut against or connect to the inner wall of the spring block 432 and the open compartment 431 respectively, so that the spring block 432 can move along the axial direction of the counterweight 3 under the elastic force of the compression spring 435.

[0060] Multiple counterweight plates 3 are stacked on the base 4. One end of the spring block 432 abuts against the outermost counterweight plate 3. The compressed spring 435 provides an inward pushing force to the multiple counterweight plates 3 through the spring block 432, so that the multiple counterweight plates 3 are kept vertically and neatly arranged.

[0061] Furthermore, a limiting hole 4311 is provided on the inner wall of the open chamber 431. A limiting bolt 433 is inserted into the limiting hole 4311. The head of the limiting bolt 433 is located on one axial side of the limiting hole 4311, and the rod is located on the other axial side. The rod and the connecting column form a coaxial threaded connection. The outer diameter of the head of the limiting bolt 433 is larger than the inner diameter of the limiting hole 4311. Thus, its head is limited by the limiting hole 4311, so that the spring block 432 and the limiting bolt 433 will not completely detach from the open chamber 431.

[0062] By rotating the limiting bolt 433 to adjust the axial distance of its head relative to the connecting column, the movable range of the spring block 432 relative to the opening chamber 431 can be adjusted, so that when different numbers of counterweight plates 3 are set on the base 4, the thrust and range of motion of the spring block 432 can be adjusted adaptively.

[0063] The end of the connecting column is fixedly connected to a threaded part 434, which has an internal thread to achieve threaded connection support between the limit bolt 433 and the connecting column.

[0064] The top of the spring block 432 is provided with a slope 4321. When multiple counterweights 3 are placed on the base 4, the slope 4321 can abut against the bottom of the outer counterweight 3, guiding the movement of the spring block 432 and reducing jamming.

[0065] In some embodiments, the counterweight adjustment mechanism is further provided with a counterweight half piece 28, as shown in the figure. Figure 4 , Figure 7 , Figure 8The counterweight half plate 28 has a crescent-shaped structure and is connected to the lower side of the outer shell 21 with its opening facing upward. The base 4 is provided with a groove 41 that cooperates with the counterweight half plate 28. The two ends of the counterweight half plate 28 abut against the outer shell 21 to prevent rotation and limit its movement. The weight of the counterweight half plate 28 can be set to half the weight of the counterweight plate 3.

[0066] A hook 281 is provided at the center of the counterweight half plate 28 and extends upward. An opening is provided at the bottom of the outer shell 21 for the hook 281 to extend upward into the cavity. Multiple flanges 233 are arranged in a circumferential array on the outer periphery of the turntable 23. During the rotation of the turntable 23, the flanges 233 can move to directly below the hook 281. When the dumbbell is lifted, the dumbbell half plate can be lifted together by the cooperation of the flanges 233 and the hook 281.

[0067] In some preferred embodiments, the number of flanges 233 may be set to three, see reference. Figure 14 Furthermore, when adjusting the counterweight, with a single counterweight piece 3 as a unit, the counterweight on one side of the handle can be selected as one unit, 1.5 units, two units, and then the weight is accumulated in increments of 0.5 units.

[0068] In other preferred embodiments, the number of flanges 233 may also be four, see reference. Figure 15 .

[0069] The weight adjustment mechanism also includes a locking disc 26, used to lock the turntable 23 when the dumbbell is lifted, preventing the turntable 23 from rotating. For details, please refer to... Figure 9 The locking disc 26 is disposed in the cavity, and a top spring 261 is disposed between the locking disc 26 and the end plate 22. The two ends of the top spring 261 are connected to the locking disc 26 and the end plate 22 respectively. The top spring 261 is arranged in a vertical direction and provides a vertical elastic force to the locking disc 26.

[0070] The locking disc 26 is arranged around the outer periphery of the turntable 23. The outer peripheral wall of the turntable 23 is provided with ring teeth 232. The inner side wall of the locking disc 26 facing the turntable 23 is provided with anti-rotation teeth 262, and the anti-rotation teeth 262 are located above the turntable 23. When the locking disc 26 is not subjected to other external forces, the locking disc 26 is moved downward by the elastic force of the top spring 261, so that the anti-rotation teeth 262 engage with the ring teeth 232 downward. Thus, the locking disc 26 has the effect of preventing the turntable 23 from rotating.

[0071] A top rod extends downward from the lower end of the locking disc 26. An opening is provided at the bottom of the outer casing 21 for the top rod to extend downward. A top block 42 is also provided at a corresponding position in the vertical direction on the base 4. When the dumbbell is placed on the base 4, the top rod and the top block 42 form a direct abutment. The top block 42 pushes the top rod upward, causing the locking disc 26 to move upward. At this time, the anti-rotation tooth 262 and the ring tooth 232 disengage, and the counterweight can be adjusted arbitrarily when the dumbbell is placed on the base 4.

[0072] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort should fall within the protection scope of this utility model.

Claims

1. A dumbbell, characterized in that, The device includes a handle, a base (4), and multiple counterweights (3) disposed on the base (4). The handle includes a rotating cylinder (11) and a telescopic rod (12) for passing through the counterweights (3). The telescopic rod (12) passes through the rotating cylinder (11) along its axial direction. The telescopic rod (12) and the rotating cylinder (11) are in clearance fit, allowing the telescopic rod (12) to rotate and move axially relative to the rotating cylinder (11). The multiple sets of counterweights (3) are arranged in layers. The counterweights are arranged in a stacked manner along the axial direction of the rotating cylinder (11). The counterweight (3) has a through hole (31) in the middle. When the counterweight (3) is set, the through hole (31) is located on the axis of the rotating cylinder (11), so that the telescopic rod (12) can pass through the through hole (31) when it moves axially. A spring block (432) is movably set on the base (4). An elastic structure is provided in the base (4) for the spring block (432) to abut against the counterweight (3) on the outside.

2. A dumbbell according to claim 1, characterized in that, The base (4) is provided with an open compartment (431), and the spring block (432) is inserted into the open compartment (431). The elastic structure includes a connecting post provided on the spring block (432), and a compression spring (435) is sleeved on the connecting post. The two ends of the compression spring (435) are respectively connected to the spring block (432) and the open compartment (431).

3. A dumbbell according to claim 2, characterized in that, It also includes a limiting bolt (433), and the inner wall of the opening chamber (431) is provided with a limiting hole (4311) for the limiting bolt (433) to pass through. The head of the limiting bolt (433) is located on one side of the limiting hole (4311), and the rod is located on the other side of the limiting hole (4311) and is threadedly connected to the connecting column.

4. A dumbbell according to claim 1, characterized in that, It also includes a counterweight adjustment mechanism, which includes a gear disk (25) and a turntable (23) coaxially arranged with the rotating drum (11). The turntable (23) is fixedly connected to the rotating drum (11). A drive wheel (24) is arranged on the circumferential direction of the turntable (23). Multiple grooves are spirally distributed on the end face of the gear disk (25). The grooves are equally divided along the circumferential direction to form multiple first direction sub-tracks (251) and second direction sub-tracks (252) that are connected in sequence at intervals. The first direction sub-tracks (251) are arranged along the circumferential direction of the gear disk (25). The second direction sub-tracks (252) are inclined at a set angle relative to the first direction sub-tracks (251) along the radial direction of the gear disk (25). Multiple tooth grooves (121) are arranged on the telescopic rod (12) in an axial array. The drive wheel (24) meshes with both the grooves and the tooth grooves (121).

5. A dumbbell according to claim 4, characterized in that, The turntable (23) is fixedly provided with a limiting ball (234). The limiting ball (234) includes a sleeve and a ball head. A spring is provided inside the sleeve for the ball head to abut against the opening of the sleeve. Multiple stop grooves are arranged in a circumferential array on the end face of the gear plate (25). During the rotation of the turntable (23), the ball head and the stop groove tend to cooperate with each other.

6. A dumbbell according to claim 4, characterized in that, It also includes a counting component, which includes a counting ring (27), a planetary gear set (271), an internal gear ring, and a counting gear (231). The counting gear (231) is coaxially disposed on the turntable (23). The counting ring (27) is coaxially sleeved on the outer periphery of the turntable (23). The planetary gear set (271) is disposed circumferentially on the counting ring (27). The internal gear ring is fixedly disposed. The inner and outer sides of the planetary gear set (271) mesh with the counting gear (231) and the internal gear ring, respectively. The outer periphery of the counting ring (27) is marked with weight.

7. A dumbbell according to claim 4, characterized in that, It also includes a locking disc (26), which is disposed on the outer periphery of the turntable (23). The outer periphery of the turntable (23) is provided with ring teeth (232), and the inner periphery of the locking disc (26) is provided with anti-rotation teeth (262). The locking disc (26) is provided with a top spring (261) for driving the anti-rotation teeth (262) to mesh with the ring teeth (232).

8. A dumbbell according to claim 1, characterized in that, It also includes a locking block. The counterweight plate (3) has a disc-shaped structure with a set thickness. The center of the counterweight plate (3) is provided with a through hole (31) for the telescopic rod (12) to pass through. The outer periphery of the counterweight plate (3) is provided with a notch (32) for inserting the locking block. The locking block is connected to two adjacent counterweight plates (3).

9. A dumbbell according to claim 8, characterized in that, The counterweight plate (3) has notches (32) at its top and bottom, and the inner wall of the notch (32) is recessed to provide a slot for inserting the lock block. A pin is inserted through the slot. The outer periphery of the lock block is provided with a semi-circular opening for engaging with the outer periphery of the pin. The lock block is provided with a slot and a plate. The slot and the plate are respectively engaged and connected with the adjacent plate and the adjacent slot.

10. A dumbbell according to claim 4, characterized in that, The counterweight adjustment mechanism also includes an end plate (22) and a housing (21). The end plate (22) and the housing (21) are fixedly connected and form a cavity for accommodating the turntable (23). The outer end face of the end plate (22) is connected to the counterweight plate (3). The gear plate (25) is fixedly connected to the inner end face of the end plate (22). The rotating cylinder (11) passes through the housing (21) and the end plate (22). The outer circumference of the drive wheel (24) is set with spherical teeth. The rotation direction plane of the drive wheel (24) coincides with the axis of the rotating cylinder (11). The outer wall of the rotating cylinder (11) is opened. The drive wheel (24) has a through slot (111) through which it passes; it also includes a counting assembly, which includes a counting ring (27), a planetary gear set (271), an internal gear ring, and a counting gear (231). The counting gear (231) is coaxially disposed on the turntable (23), the counting ring (27) is coaxially sleeved on the outer circumference of the turntable (23), the planetary gear set (271) is disposed circumferentially on the counting ring (27), the internal gear ring is disposed on the inner circumference of the outer casing (21), and the inner and outer sides of the planetary gear set (271) mesh with the counting gear (231) and the internal gear ring, respectively. The outer periphery of the counting ring (27) is marked with weight marks, and the outer wall of the outer shell (21) is provided with a viewing window for observing the outer periphery of the counting ring (27); it also includes a counterweight half piece (28), which is located on the lower side of the outer shell (21). A hook (281) is provided upward in the middle of the counterweight half piece (28), and the bottom of the outer shell (21) is provided with an opening for the hook (281) to pass through upward. The outer periphery of the turntable (23) is provided with a plurality of flanges (233) arranged in a circular array in the circumferential direction. When the turntable (23) is in a set rotation position, the flanges (233) are located at the hook. Directly below the hook (281); also includes a locking disc (26), which is located on the outer periphery of the turntable (23). A top spring (261) is provided on the locking disc (26), and the two ends of the top spring (261) are connected to the locking disc (26) and the end plate (22) respectively. A top block (42) is provided on the base (4) for abutting against the locking disc (26) in the vertical direction. The number of the drive wheels (24) is set to multiple, and they are distributed in a circular array with the axis of the rotating cylinder (11) as the center. An inclined surface (4321) is provided on the top of the spring block (432).

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