Weight-adjustable dumbbell and fitness equipment

Abstract

The utility model belongs to the technical field of fitness equipment, and discloses a weight-adjustable dumbbell and fitness equipment, the weight-adjustable dumbbell comprises a dumbbell shaft and weight stacks, the dumbbell shaft comprises a fixed section, a telescopic section and a fixed disc, the fixed disc is fixed on the fixed section, and the telescopic section is driven by a first driving mechanism to be movably connected to the fixed section along the axial direction of the telescopic section; a mounting hole for the dumbbell shaft to penetrate through is formed in the weight stack; one of the telescopic section and the weight stacks is provided with an annular clamping groove, the other one of the telescopic section and the weight stacks is provided with a clamping block, and the clamping block is driven by a second driving mechanism to be inserted into or separated from the clamping groove in the radial direction of the telescopic section. The fitness equipment comprises a base and a weight-adjustable dumbbell, and a weight stack on the weight-adjustable dumbbell can be placed in a containing groove formed in the base. The weight-adjustable dumbbell and the fitness equipment are simple in weight adjustment and convenient to operate.

Description

Technical Field

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

[0002] Dumbbells are an auxiliary tool used by fitness enthusiasts for muscle strength training. Most users adjust the weight of dumbbells by selecting different numbers of weight plates based on their individual needs.

[0003] Based on the above, a self-adjusting dumbbell is proposed in the related technology. It is used with a base, and the base is provided with a receiving groove in which multiple counterweight plates are placed. The self-adjusting dumbbell can pass through the counterweight plates placed in the base by extending and retracting the dumbbell shaft. The number of counterweight plates on the dumbbell shaft can be adjusted by the different extension and retraction lengths of the dumbbell shaft, thereby realizing the adjustment of the weight of the self-adjusting dumbbell.

[0004] However, in order to keep the weights mounted on the dumbbell shaft axially confined to the dumbbell shaft, adjacent weights are connected by dovetail joints through mutually cooperating protrusions and concave parts. When inserting a new weight plate into the dumbbell shaft, the concave part on the new weight plate must match the protrusion on the outermost weight plate on the dumbbell shaft, which is complicated and time-consuming. Utility Model Content

[0005] The purpose of this invention is to provide an adjustable dumbbell and fitness equipment to solve the problem of the long time required to add or remove weight plates from dumbbells.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, this utility model provides an adjustable dumbbell, including a dumbbell shaft and a counterweight plate. The dumbbell shaft includes a fixed section, a telescopic section, and a fixed plate. The fixed plate is fixed to the fixed section, and the telescopic section is movably connected to the fixed section along its own axial direction by a first driving mechanism. The counterweight plate has a mounting hole for the dumbbell shaft to pass through. One of the telescopic section and the counterweight plate is provided with an annular groove, and the other of the telescopic section and the counterweight plate is provided with a locking block. The locking block is driven by a second driving mechanism to be able to insert into or disengage from the locking groove along the radial direction of the telescopic section.

[0008] Optionally, the first driving mechanism includes a driving gear, a first gear nut, and a first driving member. The telescopic section includes a screw that is axially movably connected to the fixed section. The screw is circumferentially locked to the fixed section. The first gear nut is sleeved on the screw. The first driving member drives the first gear nut to rotate.

[0009] Optionally, both ends of the fixed section are provided with the telescopic section and the fixed plate.

[0010] Optionally, the telescopic sections located at both ends of the fixed section are respectively a first telescopic section and a second telescopic section. The adjustable weight dumbbell also includes a transmission assembly, which includes a transmission sleeve and a second gear nut. The transmission sleeve is sleeved on the screw on the first telescopic section and circumferentially locked with the first gear nut. The second gear nut is sleeved on the screw on the second telescopic section and circumferentially locked with the transmission sleeve. The thread directions of the screws in the first telescopic section and the second telescopic section are opposite.

[0011] Optionally, the transmission sleeve includes a first transmission section, a second transmission section, and a linkage gear set. The first transmission section is circumferentially locked to the first gear nut, and the second transmission section is circumferentially locked to the second gear nut. The first transmission section and the second transmission section are circumferentially locked by the linkage gear set.

[0012] Optionally, the first drive mechanism is disposed within the fixed disk, and the fixed disk has a through hole for the screw to pass through, the through hole restricting the rotation of the screw.

[0013] Optionally, the adjustable weight dumbbell further includes a monitoring component communicatively connected to the first drive mechanism, the monitoring component being used to monitor the travel distance of the telescopic section.

[0014] Optionally, the monitoring component includes a Hall sensor and a magnet, the magnet being disposed on the first gear nut, and the Hall sensor being disposed within the fixed disk and having multiple units arranged in a circumferential array along the fixed disk.

[0015] Optionally, the second driving mechanism includes a second driving member and a guide member. The guide member is connected to the output end of the second driving member and is provided with a strip-shaped guide hole. The locking block is movably disposed in the strip-shaped guide hole so as to be inserted into or disengaged from the slot when the second driving member rotates.

[0016] Optionally, the fixed end of the second driving member is provided with two limiting members spaced apart circumferentially, and the guide member rotates between the two limiting members.

[0017] Optionally, the card block is radially movably disposed on the telescopic section, and the second drive mechanism is located within the telescopic section.

[0018] Secondly, this utility model provides a fitness device, which includes a base and an adjustable weight dumbbell as described in any of the above claims. The base is provided with spaced-apart receiving grooves, and the counterweight plates located at both ends of the dumbbell shaft can be placed in the two receiving grooves respectively.

[0019] The beneficial effects of this utility model are as follows: When adding or removing weight plates, the adjustable dumbbells and fitness equipment provided by this utility model can be placed in the base without adjusting the position of the adjustable dumbbells, which reduces the difficulty of adjusting the weight of the adjustable dumbbells and makes the operation simple. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the fitness equipment in an embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the base structure in an embodiment of this utility model;

[0022] Figure 3 This is an exploded structural diagram of the adjustable weight dumbbell in an embodiment of this utility model;

[0023] Figure 4 This is a cross-sectional view of the fitness equipment in an embodiment of this utility model;

[0024] Figure 5 This is an exploded structural diagram of the screw and the second drive mechanism in the embodiments of this utility model;

[0025] Figure 6 This is a cross-sectional view of the counterweight plate in an embodiment of this utility model;

[0026] Figure 7 This is a schematic diagram of the guide component assembled with the second drive component in an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the retractable screw of the locking block in an embodiment of this utility model;

[0028] Figure 9 This is a schematic diagram of the structure of the card block extending screw in an embodiment of this utility model;

[0029] Figure 10 This is a schematic diagram of the Hall sensor assembled in the fixed disk in an embodiment of this utility model;

[0030] Figure 11 This is a schematic diagram of the magnet being assembled with the first gear nut in an embodiment of this utility model;

[0031] Figure 12 This is a schematic diagram of the card block exiting the card slot in an embodiment of this utility model;

[0032] Figure 13This is a schematic diagram of the structure of the card block extending into the card slot in an embodiment of this utility model.

[0033] In the picture:

[0034] 1. Dumbbell shaft; 11. Fixed section; 12. Telescopic section; 121. Screw; 122. End cap; 13. Fixed disc; 131. Disc body; 132. Disc cover; 14. Locking nut; 2. Counterweight plate; 21. Mounting hole; 22. Slot; 3. First drive mechanism; 31. First drive component; 32. Drive gear set; 33. First gear nut; 34. Pressure cap; 4. Second drive mechanism; 41. Second drive component; 42. Guide component; 421. Strip guide hole; 422. Second arc surface; 43. Limiting component; 431. First arc surface; 5. Locking block; 61. Hall sensor; 62. Magnetic body; 7. Base; 71. Receiving groove; 8. Transmission assembly; 81. Transmission sleeve; 811. First transmission section; 812. Second transmission section; 813. Linkage gear set; 82. Second gear nut; 9. Control panel; 10. Control circuit board. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] An embodiment of this utility model provides an adjustable weight dumbbell and a fitness device, the fitness device including the aforementioned adjustable weight dumbbell and a base 7. References... Figure 3 and Figure 4 As shown, the adjustable weight dumbbell includes a weight plate 2 and a telescopic dumbbell shaft 1. The weight plate 2 is generally configured as a disc or polygon with a mounting hole 21 in the center for the dumbbell shaft 1 to pass through. The dumbbell shaft 1 includes a fixed section 11 and a telescopic section 12 connected axially. The telescopic section 12 is movably disposed on the fixed section 11 along its own axis. The dumbbell shaft 1 also includes a fixed plate 13 fixedly sleeved on the fixed section 11.

[0040] refer to Figure 2 and 4 As shown, the base 7 is provided with spaced-apart receiving grooves 71. The counterweights 2 located at both ends of the dumbbell shaft 1 can be placed in the two receiving grooves 71 respectively. The receiving grooves 71 can limit a fixed number of counterweights 2, preventing the counterweights 2 from moving axially, and making adjacent counterweights 2 placed in the receiving grooves 71 fit together. It should be noted that, because the counterweights 2 fit together, the friction between adjacent counterweights 2 can limit the circumferential movement of the counterweights 2. Of course, limiting the circumferential movement of the counterweights 2 is not necessary, that is, adjacent counterweights 2 in the receiving grooves 71 do not necessarily fit together. Specifically, the receiving grooves 71 are set as arc-shaped grooves or polygonal grooves whose shape is adapted to the shape of the counterweights 2, and the width of the receiving grooves 71 is an integer multiple of the axial width of the counterweights 2.

[0041] To achieve axial positioning of the counterweight plate 2, one of the counterweight plate 2 and the dumbbell shaft 1 is provided with an annular groove 22, and the other is provided with a locking block 5. The locking block 5 has a first state of being inserted into the groove 22 radially along the dumbbell shaft 1 and a second state of being withdrawn from the groove 22 radially along the dumbbell shaft 1. When the locking block 5 is in the first state, the other counterweight plates 2 between the counterweight plate 2 that is engaged with the dumbbell shaft 1 and the fixed plate 13 are restricted. There is no need to set up a dovetail structure for mutual insertion between adjacent counterweight plates 2. Moreover, since the groove 22 is annular, the locking block 5 can be inserted into the groove 22 from any radial direction. When the adjustable dumbbell is placed on the base 7 to adjust the number of counterweight plates 2, there is no need to consider the direction of the adjustable dumbbell, making the operation simple.

[0042] Reference image - Figure 6 As shown, to achieve automatic extension and retraction of the dumbbell shaft 1 and the locking block 5, the adjustable weight dumbbell also includes a first drive mechanism 3 and a second drive mechanism 4. The first drive mechanism 3 drives the telescopic section 12 to move along its own axial direction, and the second drive mechanism 4 drives the locking block 5 to move radially along the dumbbell shaft 1. Furthermore, to reduce the manufacturing cost of the counterweight 2, the locking block 5 and the second drive mechanism 4 connected to the locking block 5 are both mounted on the dumbbell shaft 1. The locking block 5 is located at the end of the telescopic section 12 away from the fixed section 11. The telescopic section 12 has a clearance hole for the locking block 5 to pass through, and a slot 22 is provided on the counterweight 2. Specifically, the slot 22 connects to the mounting hole 21 on the counterweight 2, and the width of the slot 22 along the axial direction of the counterweight 2 is less than the length of the mounting hole 21.

[0043] refer to Figure 12 and Figure 13 As shown, when the telescopic section 12 moves axially within the mounting hole 21, the locking block 5 retracts into the clearance hole. When the locking block 5 corresponds to the target slot 22, the locking block 5 extends out of the telescopic section 12 from the clearance hole and into the slot 22, thereby achieving axial positioning of the outermost counterweight 2. The outermost counterweight 2, together with the fixing plate 13, performs axial positioning of the counterweight 2 located between the two.

[0044] Of course, the locking block 5 can also be set on the counterweight plate 2. Then, each counterweight plate 2 is provided with a locking block 5 and a second drive mechanism 4. The counterweight plate 2 is also provided with a clearance hole for the locking block 5 to pass through. The clearance hole extends radially along the mounting hole 21 and communicates with the mounting hole 21 so as to insert into the slot 22 on the telescopic section 12 that passes through the mounting hole 21.

[0045] refer to Figure 4 As shown, considering the aesthetics of the adjustable weight dumbbell, the first drive mechanism 3 is housed within the fixed plate 13, meaning the fixed plate 13 is a hollow structure. In this case, the fixed plate 13 is located at the end of the fixed section 11, and the telescopic section 12 is movably inserted within the fixed section 11. The fixed plate 13 has a through hole for the telescopic section 12 to pass through. Specifically, the fixed plate 13 includes a plate cover 132 and a plate body 131. The plate cover 132 is detachably connected to the plate body 131 using a method not limited to bolted connections or snap-fit ​​connections, to facilitate future maintenance of the first drive mechanism 3.

[0046] Continue to refer to Figure 3 and Figure 4As shown, the first drive mechanism 3 includes a drive gear set 32, a first gear nut 33, and a first drive member 31. Correspondingly, the telescopic section 12 includes a screw 121, which is a hollow structure. One end of the screw 121 away from the fixed section 11 is open to house the second drive mechanism 4. To prevent the locking block 5 from disengaging from the screw 121, the telescopic section 12 also includes an end cap 122 detachably connected to the opening of the screw 121 by a method not limited to bolt connection. The end cap 122 has a groove-shaped structure with clearance holes. The first gear nut 33 is sleeved on the screw 121. The output end of the first drive member 31 is connected to the drive gear set 32 ​​that meshes with the first gear nut 33 to drive the first gear nut 33 to rotate. To prevent the screw 121 from rotating together with the first gear nut 33, the through hole is set to be non-circular, and the end cap 122 and the screw 121 are adapted to the through hole. For example, the opposite two sides of the through hole are set to be flat, and the two flat surfaces are connected by an arc surface.

[0047] Specifically, the first driving member 31 is a motor. Depending on the orientation of the first driving member 31, different driving gears can be set in the drive gear set 32. The screw 121 moves along its own axial direction when the first gear nut 33 rotates to achieve extension and retraction. For example, if the first driving member 31 is set perpendicular to the screw 121, the drive gear set 32 ​​includes a first bevel gear and a second bevel gear that mesh with each other. The first bevel gear is connected to the first driving member 31. The drive gear set 32 ​​also includes a toothed plate that meshes with the second bevel gear and a drive gear that meshes with both the toothed plate and the first gear nut 33.

[0048] Of course, when the first drive mechanism 3 is located outside the fixed plate 13, the screw 121 can be restricted from rotating relative to the fixed section 11 by other limiting structures located on the fixed plate 13 or the fixed section 11, so that the screw 121 is circumferentially locked to the fixed section 11. For example, the screw 121 can be connected to the fixed section 11 by a sliding key.

[0049] Understandably, to ensure the weight balance at both ends of the dumbbell shaft 1, telescopic sections 12 are provided at both ends of the fixed section 11, and two corresponding fixed plates 13 are also provided, located at both ends of the fixed section 11. Specifically, the fixed section 11 is fixed to the fixed plate 13 by locking nuts 14. During assembly, both ends of the fixed section 11 are inserted into the fixed plate 13 and threadedly connected to the locking nuts 14, thereby achieving fixation with the fixed plate 13 through the cooperation of the two locking nuts 14.

[0050] Specifically, in order to maintain the stability of the first gear nut 33, the first drive mechanism 3 also includes a pressure cover 34. The pressure cover 34 is coaxially fixed on the fixed plate 13, and the pressure cover 34 has a through hole for the screw 121 to pass through. The pressure cover 34 is sleeved on the first gear nut 33 to restrict the radial movement of the first gear nut 33. At the same time, the pressure cover 34 also cooperates with the fixed section 11 to restrict the axial movement of the first gear nut 33.

[0051] For ease of description, the telescopic sections 12 at both ends of the dumbbell shaft 1 are defined as the first telescopic section and the second telescopic section, respectively. Based on this, to achieve synchronous telescopic movement of the first and second telescopic sections and further improve the efficiency of adjusting the weight of the adjustable dumbbell, the adjustable dumbbell also includes a transmission assembly 8. The transmission assembly 8 includes a transmission sleeve 81 and a second gear nut 82. The transmission sleeve 81 is fitted onto the screw 121 of the first telescopic section 12 and circumferentially locked to the first gear nut 33, allowing the first gear nut 33 to drive the transmission sleeve 81 to rotate. The second gear nut 82 is fitted onto the screw 121 of the second telescopic section 12 and connected to the transmission sleeve 81 passing through the fixed section 11. Similarly, the second gear nut 82 is circumferentially locked to the transmission sleeve 81, allowing the transmission sleeve 81 to drive the second gear nut 82 to rotate, thereby causing the screw 121 of the second telescopic section 12 to move axially. It is worth emphasizing that the screws 121 of the first telescopic section and the screws 121 of the second telescopic section have opposite thread directions to ensure that the first telescopic section and the second telescopic section move in opposite directions.

[0052] Specifically, to reduce assembly difficulty, the transmission sleeve 81 includes a first transmission section 811, a second transmission section 812, and a linkage gear set 813. The linkage gear set 813 includes a first linkage gear and a second linkage gear, which are axially connected. The first transmission section 811 is circumferentially locked to the first gear nut 33, and the second transmission section 812 is circumferentially locked to the second gear nut 82. The first transmission section 811 and the second transmission section 812 are respectively sleeved on the first linkage gear and the second linkage gear and mesh with the first linkage gear and the second linkage gear, thereby locking the first transmission section 811 and the second transmission section 812 circumferentially and achieving synchronous rotation.

[0053] During assembly, the first transmission section 811 connected to the first gear nut 33 and the second transmission section 812 connected to the second gear nut 82 are respectively inserted from both ends of the fixed section 11 into the fixed section 11 fixed to the disc body 131 until the first transmission section 811 and the second transmission section 812 mesh with the linkage gear set 813.

[0054] refer to Figure 8 and Figure 9As shown, in one embodiment, at least two locking blocks 5 are arranged at circumferential intervals along the telescopic section 12 to improve the connection stability between the counterweight 2 and the dumbbell shaft 1. To achieve synchronous telescopic movement of each locking block 5, the second drive mechanism 4 includes a second drive member 41 and a guide member 42. The second drive member 41 can also be a motor. The guide member 42 is connected to the output end of the second drive member 41 and is provided with strip-shaped guide holes 421 corresponding to each locking block 5. The locking block 5 is movably disposed in the strip-shaped guide hole 421. For example, the locking block 5 achieves a sliding connection with the guide member 42 by a pin that is slidably inserted into the strip-shaped guide hole 421. When the guide member 42 rotates with the second drive member 41, it can move away from or towards the center of the guide member 42, thereby allowing the locking block 5 to be inserted into or disengaged from the slot 22. It is understood that the locking block 5 is restricted by the clearance hole of the dumbbell shaft 1 or the counterweight and can only reciprocate radially along the dumbbell shaft 1 to prevent the locking block 5 from rotating with the guide member 42.

[0055] For example, if there are two card blocks 5, then there are also two strip guide holes 421.

[0056] In one embodiment, reference Figure 7 As shown, in order to limit the rotation angle of the guide member 42, two limiting members 43 are arranged circumferentially at intervals on the fixed end face of the second drive member 41. The guide member 42 rotates between the two limiting members 43. When the locking block 5 is inserted into or disengaged from the locking slot 22, the guide member 42 can abut against at least one of the two limiting parts, thereby achieving the limiting. Specifically, the two limiting members 43 are symmetrically arranged with respect to the axis of the second drive member 41, and a raised first arc surface 431 is provided on the side of the two limiting members 43 facing each other. The guide member 42 has four concave second arc surfaces 422 spaced circumferentially on its outer peripheral surface, and the guide member 42 is designed as a centrally symmetrical structure. When the block 5 is in the first state, two of the symmetrically arranged second arc surfaces 422 on the guide member 42 are respectively attached to the first arc surfaces 431 of the two limiting members 43. When the block 5 is in the second state, the other two symmetrically arranged second arc surfaces 422 on the guide member 42 are respectively attached to the second arc surfaces 422 of the two limiting members 43, which improves the limiting stability of the limiting members 43 on the guide member 42, thereby improving the stability of the block 5 in the first and second states.

[0057] refer to Figure 10 and Figure 11As shown, the adjustable dumbbell also includes a monitoring component communicatively connected to the first drive mechanism 3. The monitoring component monitors the movement distance of the telescopic section 12, thereby controlling the telescopic length of the dumbbell shaft 1, so that the locking block 5 aligns with the locking slot 22. In one embodiment, the monitoring component includes a Hall sensor 61 and a magnet 62. The magnet 62 is not limited to using a neodymium iron boron permanent magnet. The magnet 62 is disposed within a blind hole in the first gear nut 33, and multiple Hall sensors 61 are disposed within the fixed disk 13 and arranged in a circumferential array along the fixed disk 13. When the first gear nut 33 is driven to rotate by the first drive member 31, different Hall sensors 61 are triggered sequentially. It is understood that, based on the configuration of the monitoring component, the position of the counterweight 2 placed in the receiving groove 71 is determined. At this time, the bottom of the receiving groove 71 can be divided into multiple sub-grooves adapted to the thickness of the counterweight 2, or the counterweights 2 can be fitted together.

[0058] For example, four Hall sensors 61 are provided, and the lead of the screw 121 is 4mm. When the first gear nut 33 rotates one revolution, the screw 121 moves forward or backward by 4mm. Since the Hall sensors 61 are evenly distributed on the fixed plate 13, when the Hall sensors 61 are triggered in sequence, the screw 121 moves forward or backward by 1mm each time. Thus, the cooperation between the magnetic body 62 and the Hall sensors 61 can confirm the required length of the dumbbell shaft 1 to extend or retract, and the weight of the counterweight plate 2 attached to the adjustable dumbbell can be calculated at this time.

[0059] In other embodiments, the monitoring component may also employ a distance sensor, which will not be described in detail here.

[0060] In addition, the adjustable dumbbell also includes a control circuit board 10 and a control panel 9. The control circuit board 10 is located inside the fixed plate 13, and the control panel 9 is embedded in the fixed plate 13. The control circuit board 10 is electrically connected to the first drive mechanism 3, the second drive mechanism 4 and the control panel 9, so as to control the opening and closing of the first drive mechanism 3 and / or the second drive mechanism 4 through the control panel 9. Of course, the adjustable dumbbell can also control the first drive mechanism 3 and the second drive mechanism 4 by remote control. Remote control and control panel 9 are both existing technologies and will not be described in detail here.

[0061] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalents to the first gear nut, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An adjustable weighted dumbbell, characterized in that, include: The dumbbell shaft (1) includes a fixed section (11), a telescopic section (12) and a fixed plate (13). The fixed plate (13) is fixed to the fixed section (11), and the telescopic section (12) is driven by the first drive mechanism (3) to move along its own axis and is connected to the fixed section (11). The counterweight (2) has a mounting hole (21) through which the dumbbell shaft (1) passes; One of the telescopic section (12) and the counterweight (2) is provided with an annular slot (22), and the other of the telescopic section (12) and the counterweight (2) is provided with a locking block (5). The locking block (5) is driven by the second driving mechanism (4) to be able to insert into or disengage from the slot (22) in the radial direction of the telescopic section (12).

2. The adjustable weighted dumbbell according to claim 1, characterized in that, The first drive mechanism (3) includes a first gear nut (33) and a first drive member (31). The telescopic section (12) includes a screw (121) that is axially movably connected to the fixed section (11). The screw (121) is circumferentially locked to the fixed section (11). The first gear nut (33) is sleeved on the screw (121). The first drive member (31) drives the first gear nut (33) to rotate so that the screw (121) moves axially relative to the fixed section (11).

3. The adjustable weighted dumbbell according to claim 2, characterized in that, The telescopic section (12) and the fixed plate (13) are provided at both ends of the fixed section (11).

4. The adjustable weighted dumbbell according to claim 3, characterized in that, The telescopic sections (12) located at both ends of the fixed section (11) are the first telescopic section (12) and the second telescopic section (12), respectively. The adjustable weight dumbbell also includes a transmission assembly (8). The transmission assembly (8) includes a transmission sleeve (81) and a second gear nut (82). The transmission sleeve (81) is sleeved on the screw (121) on the first telescopic section (12) and is circumferentially locked with the first gear nut (33). The second gear nut (82) is sleeved on the screw (121) of the second telescopic section (12) and is circumferentially locked with the transmission sleeve (81). The screw (121) of the first telescopic section (12) and the screw (121) of the second telescopic section (12) have opposite thread directions.

5. The adjustable weighted dumbbell according to claim 4, characterized in that, The transmission sleeve (81) includes a first transmission section (811), a second transmission section (812), and a linkage gear set (813). The first transmission section (811) is circumferentially locked to the first gear nut (33), and the second transmission section (812) is circumferentially locked to the second gear nut (82). The first transmission section (811) and the second transmission section (812) are circumferentially locked by the linkage gear set (813).

6. The adjustable weighted dumbbell according to claim 2, characterized in that, The first drive mechanism (3) is disposed inside the fixed disk (13), and the fixed disk (13) has a through hole for the screw (121) to pass through, and the through hole restricts the rotation of the screw (121).

7. The adjustable weighted dumbbell according to claim 6, characterized in that, The adjustable weighted dumbbell also includes a monitoring component that is communicatively connected to the first drive mechanism (3), the monitoring component being used to monitor the movement distance of the telescopic section (12).

8. The adjustable weighted dumbbell according to claim 7, characterized in that, The monitoring component includes a Hall sensor (61) and a magnet (62). The magnet (62) is disposed on the first gear nut (33). The Hall sensor (61) is disposed inside the fixed disk (13) and multiple of them are arranged in a circumferential array along the fixed disk (13).

9. The adjustable weighted dumbbell according to any one of claims 1-8, characterized in that, The second driving mechanism (4) includes a second driving member (41) and a guide member (42). The guide member (42) is connected to the output end of the second driving member (41), and the guide member (42) is provided with a strip-shaped guide hole (421). The locking block (5) is movably disposed in the strip-shaped guide hole (421) so as to be inserted into or disengaged from the locking slot (22) when the second driving member (41) rotates.

10. The adjustable weighted dumbbell according to claim 9, characterized in that, The fixed end of the second driving member (41) is provided with two limiting members (43) spaced apart along the circumference, and the guide member (42) rotates between the two limiting members (43).

11. The adjustable weighted dumbbell according to any one of claims 1-8, characterized in that, The card block (5) is radially movably disposed on the telescopic section (12) along the telescopic section (12), and the second drive mechanism (4) is located inside the telescopic section (12).

12. Fitness equipment, characterized in that, The fitness equipment includes a base (7) and an adjustable weight dumbbell as described in any one of claims 1-11. The base (7) is provided with spaced-apart receiving grooves (71), and the counterweight plates (2) located at both ends of the dumbbell shaft (1) can be placed in the two receiving grooves (71) respectively.

Images