Weight-adjustable dumbbell

Abstract

The utility model discloses a weight-adjustable dumbbell which comprises a plurality of dumbbell pieces and a base used for containing the dumbbell pieces and further comprises a positioning shaft, a handle is movably arranged on the positioning shaft in a sleeved mode, a plurality of cam structures are arranged at the two ends of the handle respectively, and driving discs are arranged between the handle and the cam structures. A first connecting neck is arranged on one side of the cam structure and is divided into a first supporting part and a first connecting part, the outer contour of the first connecting part is of a polygonal structure, and the inner contour of the first connecting part is of a circular structure; a first polygonal connecting groove is formed in the other side of the cam structure; a second polygonal connecting groove is formed in the side, close to the cam structure, of the driving disc. The two ends of the positioning shaft are each provided with a control device, and the control devices are connected with the cam structures. The mode that the handle directly drives the cam disc to rotate through the driving disc is adopted, rotation of a positioning shaft is not needed, torque is reduced, and operation is more convenient; every time the handle rotates by an angle, clear feedback can be felt.

Description

Technical Field

[0001] The utility model relates to the technical field of dumbbells, in particular to a dumbbell with adjustable weight. Background Art

[0002] Patent document CN218187698U discloses a weight-adjustable dumbbell comprising several dumbbell plates, a dumbbell rod assembly for attaching the dumbbell plates, and a base for storing the dumbbell plates. The dumbbell rod assembly includes a drive shaft fixedly connected to several cam structures. The cam structures include cam plates, each of which includes a load-bearing layer for attaching to the dumbbell plates. The outer layers of the load-bearing layer are each provided with an anti-wear layer on either side of the cam plate, with one of the anti-wear layers having a plurality of raised dots on its outer surface. The anti-wear layer is provided on both sides of the cam plate, and one of the anti-wear layers has raised dots on its outer surface. The hardness of the anti-wear layer is lower than that of the dumbbell plates, effectively reducing wear on the dumbbell plates by the cam plates, extending the service life of the dumbbell plates, and improving the stability of the dumbbell plate connection. In this patent, the dumbbell weight is adjusted by rotating a graduated rotary disk to drive the drive shaft. The handle does not rotate with the drive shaft, thus saving effort and making adjustment more convenient by not requiring both hands to operate simultaneously. Summary of the Invention

[0003] According to an embodiment of the present invention, a dumbbell with adjustable weight is provided, comprising a plurality of dumbbell plates and a base for holding the dumbbell plates, and further comprising:

[0004] Positioning shaft, a movable sleeve is provided with a handle on the positioning shaft, a plurality of cam structures are provided at both ends of the handle, a driving disk is provided between the handle and the cam structure, and the handle drives the plurality of cam structures to rotate on the positioning shaft through the driving disk;

[0005] A first connecting neck is provided on one side of the cam structure. The first connecting neck is divided into a first supporting portion and a first connecting portion. The outer contour of the first connecting portion is a polygonal structure and the inner contour is a circular structure. A first polygonal connecting groove is provided on the other side of the cam structure.

[0006] A second polygonal connecting groove is provided on one side of the driving disc close to the cam structure and can be coupled with the polygonal structure of the first connecting portion;

[0007] A control device is provided at each end of the positioning shaft. The control device is connected to the cam structure and can control whether the cam structure rotates relative to the dumbbell plate.

[0008] Furthermore, the control device comprises: a ring gear assembly, a spring control block, a bridge block and a first fixed plate;

[0009] The gear ring assembly is sleeved on both ends of the positioning shaft and connected to the cam structure;

[0010] The spring control block is arranged at the lower end of the ring gear assembly and is used to lock the ring gear assembly;

[0011] The first fixed disk is rotatably sleeved on one end of the handle;

[0012] One end of the bridge block is fixedly connected to the ring gear assembly, and the other end is fixedly connected to the first fixed plate.

[0013] Furthermore, the ring gear assembly comprises: an inner fixed plate, a ring gear, a ring gear fixed plate, a pair of first elastic pins and an outer fixed plate;

[0014] A pair of first limiting grooves and a first annular protrusion are provided on the inner fixed plate; a first opening is provided on a side of the first limiting groove close to the center of the circle; a circular limiting groove is formed in the first annular protrusion;

[0015] The ring gear fixing plate is rotatably connected to the inner fixing plate. A second connecting neck is provided on the side of the ring gear fixing plate close to the cam structure. The second connecting neck is divided into a second supporting portion and a second connecting portion. The outer contour of the second connecting portion is a regular polygon and the inner contour is a circular structure. The inner fixing plate is rotatably sleeved on the second supporting portion.

[0016] The gear ring is arranged in the circular limiting groove and is fixedly connected to the gear ring fixing plate. The outer circumference of the gear ring is sequentially provided with a plurality of outer ring grooves, and the inner circumference of the gear ring is sequentially provided with a plurality of inner ring grooves;

[0017] A pair of first elastic pins are respectively arranged in a pair of first limiting grooves and protrude from the corresponding first openings to contact the outer ring groove; the spring control block can be engaged with the inner ring groove;

[0018] The outer fixing plate is connected to the inner fixing plate. A second limiting groove is provided at the bottom of the outer fixing plate. The spring control block is movably provided in the second limiting groove.

[0019] Furthermore, it also includes: an indicator plate and a pointer;

[0020] The indicator disk is arranged between the first fixed disk and the handle and rotates with the handle. The indicator disk is provided with a weight mark.

[0021] One end of the pointer is clamped with the first fixed disk, and the other end is clamped with the outer fixed disk, and is used for indicating the weight mark of the indicating disk.

[0022] Furthermore, a first positioning groove is provided on the bridge block, and the pointer is provided in the first positioning groove.

[0023] Furthermore, a first shaft body and a second shaft body are sequentially provided at the end of the positioning shaft, the diameter of the first shaft body is smaller than the diameter of the positioning shaft, and the diameter of the second shaft body is smaller than the diameter of the first shaft body; a second annular protrusion is provided on the inner side of the outer fixed disk, and a third annular protrusion is provided inside the second annular protrusion, the second annular protrusion is rotatably connected to the positioning shaft, and the third annular protrusion is rotatably connected to the first shaft body.

[0024] Furthermore, it also includes: a nut, a third limiting groove is provided on the outer fixing plate, a thread is provided on the second shaft, the nut is arranged in the third limiting groove and is threadedly connected to the second shaft.

[0025] Furthermore, it also includes: a sealing cap, which is used to seal the third limiting groove.

[0026] Furthermore, a boss is provided at each end of the base, and the boss corresponds to the spring control block and is used to lift the spring control block.

[0027] The beneficial effects of the present invention are as follows: the handle directly drives the cam plate to rotate through the driving plate, and the positioning shaft does not need to be rotated, which reduces the torque and makes the operation more convenient; the setting of the limit gear ring and the elastic latch is adopted, and clearer feedback can be felt every time the handle is rotated by an angle, which provides a better user experience; and it is ensured that the handle can only stay at the position corresponding to the scale during the rotation process, avoiding the risk of staying in the middle, and solving the safety problem caused by the dumbbell plates falling off during use.

[0028] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A perspective view of an embodiment of the present invention;

[0030] Figure 2 It is a front view according to an embodiment of the present utility model;

[0031] Figure 3 for Figure 2 AA section view;

[0032] Figure 4 for Figure 3 A magnified view of point A;

[0033] Figure 5 for Figure 3 Enlarged view of point B;

[0034] Figure 6 Schematic diagram of the structure of the drive disc according to an embodiment of the present utility model;

[0035] Figure 7This is a schematic diagram of the structure of the bell piece and the driving disc according to an embodiment of the present utility model;

[0036] Figure 8 This is a schematic structural diagram of the ring gear assembly according to an embodiment of the present invention after the outer fixing plate is removed;

[0037] Figure 9 This is a schematic structural diagram of the gear ring and the gear ring fixing plate according to an embodiment of the present utility model;

[0038] Figure 10 Schematic diagram of the structure of a bridge block according to an embodiment of the present utility model;

[0039] Figure 11 Schematic diagram of the distribution of numbers on the indicator plate according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to further illustrate the present invention.

[0041] First, combine Figures 1 to 11 The weight-adjustable dumbbell according to the embodiment of the present invention is described and is used in the fitness industry and has a wide range of application scenarios.

[0042] like Figures 1 to 11 As shown, the weight-adjustable dumbbell of the embodiment of the present invention comprises a plurality of dumbbell plates 1 and a base 2 for holding the dumbbell plates 1. The dumbbell plates 1 are provided with hanging grooves 11 (which belong to the prior art), and further comprises:

[0043] A positioning shaft 3 is provided with a handle 4 movably sleeved on the positioning shaft 3. A plurality of cam structures 5 are provided at both ends of the handle 4. A driving disk 6 is provided between the handle 4 and the cam structure 5. The handle 4 drives the plurality of cam structures 5 to rotate on the positioning shaft 3 through the driving disk 6. The plurality of cam structures 5 can move different numbers of dumbbell pieces 1 by different rotation angles. Each cam structure 5 has a different cam profile (this belongs to the prior art).

[0044] A first connecting neck 51 is provided on one side of the cam structure 5. The first connecting neck 51 is divided into a first supporting portion 511 and a first connecting portion 512. The outer contour of the first connecting portion 512 is a polygonal structure and the inner contour is a circular structure. A first polygonal connecting groove 52 is provided on the other side of the cam structure 5. Adjacent cam structures 5 can be coupled and connected through the corresponding first connecting portion 512 and the first polygonal connecting groove 52.

[0045] A second polygonal connecting groove 61 is provided on one side of the driving disc 6 close to the cam structure 5, which can be coupled to the polygonal structure of the first connecting portion 512. One side of the driving disc 6 is fixedly connected to the handle 4, and the other side is coupled to the first connecting portion 512 of the adjacent cam structure 5 through the second polygonal connecting groove 61.

[0046] A control device 7 is provided at each end of the positioning shaft 3 . The control device 7 is connected to the cam structure 5 and can control whether the cam structure 5 rotates relative to the dumbbell plate 1 .

[0047] Specifically, in this embodiment, the thickness of the dumbbell plate 1 is adjustable, and dumbbell plates 1 of different thicknesses represent different weights. The width of the first support portion 511 can be adjusted according to the thickness of the dumbbell plate 1, and the width of the first support portion 511 of the cam structure 5 directly connected to the drive disk 6 can be 0.

[0048] Further, if Figures 1 to 10 As shown, in this embodiment, the control device 7 includes: a ring gear assembly 71, a spring control block 72, a bridge block 73 and a first fixed plate 74;

[0049] The ring gear assembly 71 is sleeved on both ends of the positioning shaft 3 and connected to the cam structure 5;

[0050] The spring control block 72 is provided at the lower end of the ring gear assembly 71 and is used to lock the ring gear assembly 71;

[0051] The first fixed plate 74 is rotatably mounted on one end of the handle 4;

[0052] The bridge block 73 is arranged in the opening of the dumbbell plate 1, one end of which is fixedly connected to the ring gear assembly 71, and the other end is fixedly connected to the first fixed plate 74, which is used to prevent relative rotation between the cam structure 5 and the dumbbell plate 1 when the handle 4 is picked up, thereby preventing the dumbbell plate 1 from falling.

[0053] Further, if Figures 1 to 10 As shown, in this embodiment, the ring gear assembly 71 includes: an inner fixed plate 711, a ring gear 712, a ring gear fixed plate 713, a pair of first elastic pins 714 and an outer fixed plate 715;

[0054] A pair of first limiting grooves 7111 and a first annular protrusion 7112 are provided on the inner fixing plate 711; a first opening is provided on one side of the first limiting groove 7111 close to the center of the circle; a circular limiting groove is formed in the first annular protrusion 7112;

[0055] The ring gear fixing plate 713 is rotatably connected to the inner fixing plate 711. A second connecting neck 7131 is provided on the side of the ring gear fixing plate 713 close to the cam structure 5. The second connecting neck 7131 is divided into a second supporting portion 71311 and a second connecting portion 71312. The outer contour of the second connecting portion 71312 is a regular polygon and the inner contour is a circular structure. The second connecting portion 71312 is coupled to the first polygonal connecting groove 52 of the adjacent cam structure 5, and the ring gear fixing plate 713 can rotate with the adjacent cam structure 5; the inner fixing plate 711 is rotatably mounted on the second supporting portion 71311, and the ring gear fixing plate 713 can rotate relative to the inner fixing plate 711.

[0056] The gear ring 712 is disposed in a circular limiting groove formed in the first annular protrusion 7112 and is fixedly connected to the gear ring fixing plate 713. A plurality of outer ring grooves 7121 are sequentially disposed on the outer circumference of the gear ring 712, and a plurality of inner ring grooves 7122 are sequentially disposed on the inner circumference of the gear ring 712.

[0057] A pair of first elastic pins 714 are respectively disposed in a pair of first limiting grooves 7111 and protrude from the corresponding first openings to contact the outer ring groove 7121. When the ring gear 712 rotates, vibration occurs between the first elastic pins 714 and the outer ring groove 7121, thereby sensing whether the rotation is in place.

[0058] The spring control block 72 can be engaged with the inner ring groove 7122. When the handle 4 is lifted, the spring control block 72 is engaged with the inner ring groove 7122, and the ring gear fixing plate 713 cannot rotate relative to the outer fixing plate 715. When the handle 4 is lowered, the boss on the base 2 lifts the corresponding spring control block 72, and the spring control block 72 is disengaged from the inner ring groove 7122. The ring gear fixing plate 713 can rotate relative to the outer fixing plate 715, thereby achieving weight adjustment.

[0059] The outer fixing plate 715 is fixedly connected to the inner fixing plate 711 by screws. A second limiting groove 7151 is provided at the bottom of the outer fixing plate 715 , and the spring control block 72 is movably provided in the second limiting groove 7151 .

[0060] Further, if Figure 1 、 11 As shown, in this embodiment, it also includes: an indicator plate 81 and a pointer 82;

[0061] The indicator disc 81 is disposed between the first fixed disc 74 and the handle 4 and rotates with the handle 4. A weight mark is provided on the indicator disc 81.

[0062] One end of the pointer 82 is engaged with the first fixed plate 74 , and the other end is engaged with the outer fixed plate 715 , and is used to indicate the weight mark of the indicator plate 81 .

[0063] Further, if Figure 1 、 10 As shown, in this embodiment, a first positioning groove 731 is provided on the bridge block 73 , and the pointer 82 is disposed in the first positioning groove 731 . The first positioning groove 731 is used to limit the position of the pointer 82 .

[0064] Further, if Figure 4 As shown, in this embodiment, the end of the positioning shaft 3 is sequentially provided with a first shaft body 31 and a second shaft body 32, the diameter of the first shaft body 31 is smaller than the diameter of the positioning shaft 3, and the diameter of the second shaft body 32 is smaller than the diameter of the first shaft body 31; a second annular protrusion 7152 is provided on the inner side of the outer fixed disk 715, and a third annular protrusion 7153 is provided inside the second annular protrusion 7152, the second annular protrusion 7152 is rotatably connected to the positioning shaft 3, and the third annular protrusion 7153 is rotatably connected to the first shaft body 31, so as to prevent the outer fixed disk 715 from moving inward along the axial direction.

[0065] Further, if Figures 3 and 4 As shown, in this embodiment, it also includes: a nut 76, a third limiting groove is provided on the outer fixing plate 715, a thread is provided on the second shaft body 32, the nut 76 is set in the third limiting groove, and is threadedly connected to the second shaft body 32 for fixing the outer fixing plate 715, and the threaded connection also facilitates disassembly.

[0066] Further, if Figure 1 、 3 As shown in Figure 4, in this embodiment, it also includes a sealing cap 75, which is used to seal the third limiting groove.

[0067] Further, if Figure 3 As shown, in this embodiment, a boss 21 is provided at each end of the base 2 , and the boss 21 corresponds to the spring control block 72 and is used to lift the spring control block 72 .

[0068] Working principle: When the dumbbell is placed on the base 2, the boss 21 on the base 2 lifts the corresponding spring control block 72, and the spring control block 72 disengages from the inner ring groove 7122. The ring gear fixing plate 713 can rotate relative to the outer fixing plate 715. At this time, the handle 4 is rotated, and the handle 4 can drive the driving plate 6, the cam structure 5, the ring gear 712, and the ring gear fixing plate 713 to rotate together, while the dumbbell pieces 1 are fixed on the base 2 and do not rotate. Therefore, the rotation angle of the handle 4 is different, and the number of dumbbell pieces 1 brought by the cam structure 5 is also different, thereby realizing weight adjustment. On the contrary, when the dumbbell is detached from the base 2, the spring control block 72 is engaged with the inner ring groove 7122, and the ring gear fixing plate 713 cannot rotate relative to the outer fixing plate 715. At this time, the handle 4 is rotated, and the handle 4 can drive the driving plate 6, cam structure 5, ring gear 712, ring gear fixing plate 713, inner fixing plate 711, outer fixing plate 715, bridge block 73, and first fixing plate 74 to rotate together. The bridge block 73 will drive the dumbbell plate 1 to rotate synchronously, thereby preventing the dumbbell plate 1 from falling.

[0069] Above, refer to Figures 1 to 11 The utility model describes a dumbbell with adjustable weight according to an embodiment of the present invention, which adopts a method of using a handle to directly drive the cam plate to rotate through a driving plate, and does not require the rotation of a positioning shaft, thereby reducing torque and making operation more convenient; the setting of a limiting gear ring and an elastic latch is adopted, so that every time the handle is rotated by an angle, relatively clear feedback can be felt, and the user experience is better; and it is ensured that the handle can only stay at the position corresponding to the scale during the rotation process, avoiding the risk of staying in the middle, and solving the safety problem caused by the dumbbell plates falling off during use.

[0070] It should be noted that, in this specification, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the elements.

[0071] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as limiting the present invention. After reading the above description, various modifications and alternatives to the present invention will be readily apparent to those skilled in the art. Therefore, the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A dumbbell with adjustable weight, comprising a plurality of dumbbell plates and a base for holding the dumbbell plates, characterized in that: Also includes: A positioning shaft, wherein a handle is movably sleeved on the positioning shaft, and a plurality of cam structures are respectively provided at both ends of the handle. A driving disk is provided between the handle and the cam structures, and the handle drives the plurality of cam structures to rotate on the positioning shaft through the driving disk; A first connecting neck is provided on one side of the cam structure. The first connecting neck is divided into a first supporting portion and a first connecting portion. The outer contour of the first connecting portion is a polygonal structure and the inner contour is a circular structure. A first polygonal connecting groove is provided on the other side of the cam structure. A second polygonal connecting groove is provided on one side of the driving disc close to the cam structure and can be coupled with the polygonal structure of the first connecting portion; A control device is respectively provided at both ends of the positioning shaft. The control device is connected to the cam structure and can control whether the cam structure rotates relative to the dumbbell plate.

2. The weight-adjustable dumbbell according to claim 1, wherein: The control device comprises: a ring gear assembly, a spring control block, a bridge block and a first fixed plate; The ring gear assembly is sleeved on both ends of the positioning shaft and connected to the cam structure; The spring control block is arranged at the lower end of the ring gear assembly and is used to lock the ring gear assembly; The first fixed plate is rotatably sleeved on one end of the handle; One end of the bridge block is fixedly connected to the ring gear assembly, and the other end is fixedly connected to the first fixed plate.

3. The weight-adjustable dumbbell according to claim 2, wherein: The ring gear assembly comprises: an inner fixed plate, a ring gear, a ring gear fixed plate, a pair of first elastic pins and an outer fixed plate; The inner fixed plate is provided with a pair of first limiting grooves and a first annular protrusion; a first opening is provided on a side of the first limiting groove close to the center of the circle; a circular limiting groove is formed in the first annular protrusion; The ring gear fixing plate is rotatably connected to the inner fixing plate. A second connecting neck is provided on the side of the ring gear fixing plate close to the cam structure. The second connecting neck is divided into a second supporting portion and a second connecting portion. The outer contour of the second connecting portion is a regular polygon and the inner contour is a circular structure. The inner fixing plate is rotatably sleeved on the second supporting portion. The gear ring is arranged in the circular limiting groove and is fixedly connected to the gear ring fixing plate. The outer circumference of the gear ring is sequentially provided with a plurality of outer ring grooves, and the inner circumference of the gear ring is sequentially provided with a plurality of inner ring grooves; The pair of first elastic pins are respectively arranged in the pair of first limiting grooves and protrude from the corresponding first openings to contact the outer ring groove; the spring control block can be engaged with the inner ring groove; The outer fixing plate is connected to the inner fixing plate. A second limiting groove is provided at the bottom of the outer fixing plate. The spring control block is movably provided in the second limiting groove.

4. The weight-adjustable dumbbell according to claim 3, wherein: Also includes: indicator disc and pointer; The indicator disc is arranged between the first fixed disc and the handle and rotates with the handle, and a weight mark is arranged on the indicator disc; One end of the pointer is clamped with the first fixed disk, and the other end is clamped with the outer fixed disk, and is used to indicate the weight mark of the indicator disk.

5. The weight-adjustable dumbbell according to claim 4, wherein: The bridge block is provided with a first positioning groove, and the pointer is arranged in the first positioning groove.

6. The weight-adjustable dumbbell according to claim 3, wherein: The end of the positioning shaft is sequentially provided with a first shaft body and a second shaft body, the diameter of the first shaft body is smaller than the diameter of the positioning shaft, and the diameter of the second shaft body is smaller than the diameter of the first shaft body; a second annular protrusion is provided on the inner side of the outer fixed disk, and a third annular protrusion is provided inside the second annular protrusion, and the second annular protrusion is rotatably connected to the positioning shaft and the third annular protrusion is rotatably connected to the first shaft body.

7. The weight-adjustable dumbbell according to claim 6, wherein: It also includes: a nut, a third limiting groove is provided on the outer fixed disk, a thread is provided on the second shaft, the nut is arranged in the third limiting groove and is threadedly connected to the second shaft.

8. The weight-adjustable dumbbell according to claim 7, wherein: It also includes: a sealing cap, which is used to seal the third limiting groove.

9. The weight-adjustable dumbbell according to claim 2, wherein: A boss is respectively provided at both ends of the base, and the boss corresponds to the spring control block and is used to lift the spring control block.

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