Dumbbell capable of rapidly adjusting weight

Abstract

The utility model relates to a dumbbell capable of quickly adjusting weight, which comprises a dumbbell handle group and a dumbbell piece group, the dumbbell handle group comprises a rotating handle, an outer protecting cover and an inner protecting cover are arranged at the left end and the right end of the rotating handle, a protecting cover fixing frame is arranged between the inner protecting cover and the outer protecting cover, and a left cam group and a right cam group are fixedly arranged on the left side and the right side of the rotating handle respectively. The left cam group and the right cam group are arranged in the protecting cover fixing frame and are respectively composed of at least two groups of cams; the protective cover fixing frame is arranged in the dumbbell piece set, the dumbbell piece set is composed of at least two dumbbell pieces, the dumbbell pieces and the cams are arranged correspondingly, the cams are connected with cam swing arms in a matched mode, the cam swing arms are driven by the cams to swing outwards to enter steps of the dumbbell pieces, the cam swing arms are connected with reset springs, and the other ends of the reset springs are fixed in the protective cover fixing frame. The dumbbell does not need to be manually disassembled, increased or decreased, the lifting weight can be adjusted by rotating the handle, and the dumbbell is simple in structure, convenient to use, safe, reliable, multiple in adjusting gear, small in size and convenient to store and carry.

Description

Technical Field

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

[0002] At present, many of the traditional dumbbells on the market have fixed and non-adjustable weights, such as 2, 4, 6... 10, 20, 22, 24... 32 kg. For different users' needs of different weights for different exercise parts, different intensities or different exercise stages, users need to equip a set of dumbbells with different weights, which not only increases the expenditure on equipment purchase, but also is not convenient for storage and carrying.

[0003] Although there are some conventional adjustable dumbbells on the market, which are composed of a dumbbell rod, several detachable weight plates and two nuts (or spring collars); however, when adjusting the weight of this type of dumbbell, first, the nuts at both ends need to be removed (or the spring collars need to be disassembled), then the weight plates are increased or decreased, and then the nuts are screwed on (or the spring collars are installed); although this type of adjustable dumbbell can achieve adjustable weight, the method of manually disassembling and increasing or decreasing the weight plates to adjust the weight is time-consuming and laborious, and it also requires manual calculation of the adjusted weight, which is very unintuitive.

[0004] In addition, there is another type of dumbbell on the market that can adjust the weight, but it is necessary to rotate in different directions from both ends and the digital indications are the same; or rotate the handle to adjust, but after adjusting to the maximum weight, it is necessary to reverse to reduce the weight one by one to return to the lightest position, and the weight change is relatively cumbersome. Content of the Utility Model

[0005] The purpose of the utility model is to solve the above deficiencies and provide a dumbbell with quickly adjustable weight, which realizes that there is no need to manually disassemble and increase or decrease the dumbbell, and only needs to rotate the handle to adjust the lifted weight, and has the advantages of simple structure, convenient use, safe and reliable, multiple adjustment gears, small volume, and is convenient for collection and carrying.

[0006] To achieve the above object, a dumbbell with quickly adjustable weight is designed, which includes a dumbbell handle group 1 and a weight plate group 2. The dumbbell handle group 1 includes a rotatable rotating handle 7. Outer covers 4 and inner covers 6 are installed at both the left and right ends of the rotating handle 7. A cover fixing frame 5 is connected between the outer cover 4 and the inner cover 6. Left cam groups 10 and right cam groups 11 are respectively fixedly installed on both sides of the rotating handle 7. The left cam groups 10 and the right cam groups 11 are placed in the cover fixing frame 5 and each consists of at least two sets of cams. The cams rotate as the rotating handle 7 rotates. The cover fixing frame 5 is placed in the weight plate group 2. The weight plate group 2 is composed of at least two dumbbell plates. The dumbbell plates are arranged corresponding to the cams. The cams are connected with cam swing arms 8 in a matching way. The cam swing arms 8 swing outwards under the drive of the cams and enter into the steps 12 of the dumbbell plates. A return spring 9 is connected to the cam swing arms 8, and the other end of the return spring 9 is fixed in the cover fixing frame 5. The outward-swinging cam swing arms 8 are reset under the action of the return spring 9.

[0007] Further, a U-shaped groove 13 adapted to the outer shape of the cover fixing frame 5 is formed on the weight plate group 2. The cover fixing frame 5 is placed in the U-shaped groove 13 of the weight plate group 2. The steps 12 of the dumbbell plates are arranged at one side of the inner bottom of the U-shaped groove 13.

[0008] Further, both the left and right ends of the rotating handle 7 sequentially pass through the inner cover 6, the cover fixing frame 5 and the outer cover 4. Threads are provided at both the left and right ends of the rotating handle 7, and the rotating handle 7 is screwed onto the outer cover 4 through the threads.

[0009] Further, the dumbbell plates of the weight plate group 2 are placed in a bottom tray 3. A plurality of limiting arc-shaped grooves 14 are provided in the bottom tray 3 according to the number of dumbbell plates. Each dumbbell plate is placed in a corresponding limiting arc-shaped groove 14. Limiting walls 15 for preventing the dumbbell plates from tilting are provided on both sides of the notch of each limiting arc-shaped groove 14.

[0010] Further, a limiting pit 16 is provided at the bottom of each dumbbell plate, and a limiting boss 17 is provided on the inner bottom surface of the bottom tray 3 in contact with each dumbbell plate. The limiting bosses 17 and the limiting pits 16 are arranged corresponding to each other.

[0011] Further, at least two sets of cams of the left cam groups 10 and the right cam groups 11 are sequentially staggered along the axial direction and are sequentially staggered by a certain angle in the circumferential direction. When each cam of the left cam groups 10 and the right cam groups 11 rotates, the corresponding cam swing arms 8 are respectively pushed out by different angles.

[0012] Compared with the prior art, the utility model is characterized in that a left cam group and a right cam group composed of multiple cams are respectively arranged on the left and right sides of a rotatable handle. When the cam groups rotate, the corresponding cam swing arms are respectively pushed out by different angles. When a cam overcomes the spring force of a return spring and pushes the cam swing arm to swing outwards, the cam swing arm swings out from the fixed frame of the inner and outer covers, that is, the cam swing arm protrudes a certain distance from the fixed frame and enters the step of the bell plate. At this time, when the rotary handle is lifted, the cam swing arm catches the bell plate because it swings out from the fixed frame, so that the bell plate is selected and lifted. For the cam swing arms that fail to swing out from the fixed frame, they do not catch the bell plate, so the bell plate is not selected and cannot be lifted when the rotary handle is lifted. In addition, the bell plates of the bell plate group of the utility model are placed on a bottom tray. The bottom tray is designed with multiple limiting arc-shaped grooves according to the bell plates. Limiting retaining walls for preventing the bell plates from tilting are arranged on both sides of the groove openings. Moreover, a concave pit for preventing misplacement is arranged at the bottom of each dumbbell plate. Correspondingly, a limiting convex platform is arranged on the bottom tray surface in contact with each dumbbell plate to prevent the dumbbell plate from being placed in place incorrectly, resulting in the failure of the handle group to be adjusted. That is, the bell plates of all weights of the adjustable dumbbells of the utility model are placed on the bottom tray, and there is no need to manually disassemble, add or subtract. The weight lifted can be adjusted by rotating the handle.

[0013] In summary, the utility model provides an adjustable dumbbell with a simple structure, convenient use, safety and reliability, multiple adjustment gears, small volume, and is convenient for collection and carrying, and is worthy of popularization and application. [Description of the Drawings]

[0014] Figure 1 is the overall structural schematic diagram of the utility model;

[0015] Figure 2 is the assembly structural schematic diagram of the utility model;

[0016] Figure 3 is the assembly structural schematic diagram at the rotary handle of the utility model;

[0017] Figure 4 、 Figure 5 are respectively the structural schematic diagrams of the limiting convex platform and the limiting concave pit of the utility model;

[0018] Figure 6 is the assembly schematic diagram of the limiting convex platform and the limiting concave pit of the utility model;

[0019] Figure 7 is Figure 6 the partial enlarged view at position I in

[0020] Figure 8 、 Figure 9 are respectively the structural schematic diagrams of the limiting arc-shaped groove and the limiting wall of the utility model;

[0021] Figure 10Schematic cross-sectional structure of the cam group and the cam swing arm of the present utility model Figure 1 (The cam swing arm is not swung out);

[0022] Figure 11 Schematic cross-sectional structure of the cam group and the cam swing arm of the present utility model Figure 2 (The cam swing arm is swung out);

[0023] Figure 12 Schematic assembly structure diagram of the cam group and the cam swing arm of the present utility model;

[0024] Figure 13 Schematic diagram of the positions of four cams in the embodiment of the present utility model Figure 1 (None of the four cam swing arms are swung out);

[0025] Figure 14 Schematic structure diagram in which none of the four dumbbell plates in the embodiment of the present utility model are lifted;

[0026] Figure 15 Schematic diagram of the positions of four cams in the embodiment of the present utility model Figure 2 (Only one cam swing arm is swung out);

[0027] Figure 16 Schematic structure diagram in which only one dumbbell plate in the embodiment of the present utility model is lifted;

[0028] Figure 17 Schematic diagram of the positions of four cams in the embodiment of the present utility model Figure 3 (Two cam swing arms are swung out);

[0029] Figure 18 Schematic structure diagram in which two dumbbell plates in the embodiment of the present utility model are lifted;

[0030] Figure 19 Schematic diagram of the positions of four cams in the embodiment of the present utility model Figure 4 (Three cam swing arms are swung out);

[0031] Figure 20 Schematic structure diagram in which three dumbbell plates in the embodiment of the present utility model are lifted;

[0032] Figure 21 Schematic diagram of the positions of four cams in the embodiment of the present utility model Figure 5 (All four cam swing arms are swung out);

[0033] Figure 22 Schematic structure diagram in which all four dumbbell plates in the embodiment of the present utility model are lifted;

[0034] In the figure: 1. Dumbbell handle group; 2. Weight plate group; 3. Bottom tray; 4. Outer cover; 5. Cover fixing frame; 6. Inner cover; 7. Rotating handle; 8. Cam swing arm; 9. Return spring; 10. Left cam group; 11. Right cam group; 12. Step; 13. U-shaped groove; 14. Limit arc groove; 15. Limit wall; 16. Limit pit; 17. Limit boss; A-1. Left dumbbell plate one; A-2. Left dumbbell plate two; A-3. Left dumbbell plate three; A-4. Left dumbbell plate four; B-1. Right dumbbell plate one; B-2. Right dumbbell plate two; B-3. Right dumbbell plate three; B-4. Right dumbbell plate four. [Specific implementation manner]

[0035] As shown in the attached Figure 1 to the attached Figure 12 As shown in the figure, the present utility model provides a dumbbell with quickly adjustable weight, which includes a dumbbell handle group 1 and a weight plate group 2. The dumbbell handle group 1 includes a rotatable rotating handle 7. Outer covers 4 and inner covers 6 are installed at both the left and right ends of the rotating handle 7. A cover fixing frame 5 is connected between the outer cover 4 and the inner cover 6. Left cam groups 10 and right cam groups 11 are respectively and fixedly installed on both sides of the rotating handle 7. The left cam groups 10 and the right cam groups 11 are placed in the cover fixing frame 5 and are each composed of at least two groups of cams. The cams rotate with the rotation of the rotating handle 7. The cover fixing frame 5 is placed in the weight plate group 2. The weight plate group 2 is composed of at least two dumbbell plates. The dumbbell plates are arranged corresponding to the cams. The cams are cooperatively connected with cam swing arms 8. The cam swing arms 8 swing outwards under the drive of the cams and enter the steps 12 of the dumbbell plates. A return spring 9 is connected to the cam swing arms 8, and the other end of the return spring 9 is fixed in the cover fixing frame 5. The outward-swinging cam swing arms 8 are reset under the action of the return spring 9.

[0036] Among them, the dumbbell plates of the weight plate group 2 are placed in the bottom tray 3. A plurality of limit arc grooves 14 are provided in the bottom tray 3 according to the number of dumbbell plates. Each dumbbell plate is placed in a corresponding limit arc groove 14. Limit walls 15 for preventing the dumbbell plates from tilting are provided on both sides of the notch of each limit arc groove 14. Limit pits 16 are provided at the bottom of each dumbbell plate, and limit bosses 17 are provided on the inner bottom surface of the bottom tray 3 in contact with each dumbbell plate. The limit bosses 17 and the limit pits 16 are arranged corresponding to each other.

[0037] The dumbbell set 2 is provided with a U-shaped groove 13 that matches the outer shape of the cover fixing frame 5. The cover fixing frame 5 is placed in the U-shaped groove 13 of the dumbbell set 2. The step 12 of the dumbbell is arranged on one side of the bottom of the U-shaped groove 13. The left and right ends of the rotating handle 7 pass through the inner cover 6, the cover fixing frame 5 and the outer cover 4 in sequence. The left and right ends of the rotating handle 7 are provided with threads and are screwed onto the outer cover 4 through the threads. At least two groups of cams of the left cam set 10 and the right cam set 11 are staggered in sequence along the axial direction and staggered in sequence along the circumferential direction by a certain angle. When each cam of the left cam set 10 and the right cam set 11 rotates, the corresponding cam swing arm 8 is pushed out to different angles.

[0038] The adjustable dumbbell described in the utility model comprises a dumbbell handle group, which comprises a rotatable handle, wherein the left and right ends of the handle are respectively provided with a fixed outer protective cover and an inner protective cover, and a fixing frame connecting the inner and outer protective covers; the left and right sides of the rotatable handle are respectively provided with a left cam group and a right cam group consisting of four groups of cams, and when the cam groups rotate, the matched cam swing arms are correspondingly pushed out to different angles, and when the dumbbell handle group is lifted, the cam swing arms will be correspondingly stuck in the counterweight dumbbell plates, and when all the cam swing arms are at the maximum, the handle continues to be rotated, and the reset spring returns the cam swing arms to the original position under the action of the spring force, so that the handle continues to rotate in the same rotation direction.

[0039] The dumbbells of the dumbbell group are placed in the bottom tray, which is designed with multiple arc-shaped grooves according to the dumbbells; there are limit walls on both sides of the grooves to prevent the dumbbells from tilting, and there is a pit at the bottom of each dumbbell to prevent misplacement. There is a limit boss on the bottom tray surface that contacts each dumbbell to prevent the dumbbell from being placed in the wrong place, which will cause the handle group to fail to adjust. The dumbbells of all weights can be placed on the base, and there is no need to manually disassemble to increase or decrease. The weight can be adjusted by rotating the handle.

[0040] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0041] The utility model dumbbell is composed of a dumbbell handle group, a bell plate group, a bottom tray, an outer protective cover, a protective cover fixing frame, an inner protective cover, a rotating handle, a cam swing arm, a reset spring, a left cam group and a right cam group. The left cam group and the right cam group are both provided with four cams, and from the inside to the outside, they are cam one, cam two, cam three and cam four respectively. When the handle is rotated, the handle drives the cam groups on the left and right sides to rotate in the same direction at the same time, and the cam overcomes the spring force of the reset spring to push the cam swing arm to swing outward, and the cam swing arm swings out from the fixing frame of the inner and outer protective covers. When the handle is rotated to a certain angle, the cam swing arm also protrudes a certain distance from the fixing frame, and this distance also enters the bell plate step; when the handle is lifted, the cam swing arm swings out of the fixing frame to clamp the bell plate, so that the bell plate is selected and lifted; if the cam swing arm fails to swing out of the fixing frame and does not clamp the bell plate, the bell plate is not selected and cannot be lifted.

[0042] As shown in the attached Figure 13 figure, when the dumbbell is set to the lightest weight setting, there is no need to rotate the handle. Under the action of the return spring, each cam's swing arm is within the fixed bracket of the protective cover, and all the dumbbell plates do not contact the cam swing arms;

[0043] At this time, when the dumbbell handle is lifted, the dumbbell plates all remain in the bottom tray, which is the weight of the dumbbell handle group itself. As shown in the attached Figure 14 figure.

[0044] As shown in the attached Figure 15 figure, when the dumbbell is set to one weight increment heavier, rotate the handle. The handle simultaneously drives the cam groups on both the left and right sides. The cam swing arms rotate against the pulling force of the spring. Since the protruding angles of each cam are different, Cam 1 pushes Cam Swing Arm 1 out of the fixed bracket of the protective cover, and Cam Swing Arm 1 swings out of the fixed bracket to catch Dumbbell Plate 1, namely the reference signs A-1, B-1; the remaining cam swing arms are all within the fixed bracket of the protective cover, and the other dumbbell plates do not contact the cam swing arms;

[0045] At this time, when the dumbbell handle is lifted, Dumbbell Plate 1 will be lifted together with the handle group; the other dumbbell plates remain in the bottom tray, completing this weight increment operation. As shown in the attached Figure 16 figure.

[0046] As shown in the attached Figure 17 figure, when the dumbbell is set to another weight increment heavier, continue to rotate the handle. The handle simultaneously drives the cam groups on both the left and right sides. Cam 1 and Cam 2 push Cam Swing Arm 1 and Cam Swing Arm 2 out of the fixed bracket of the protective cover, and Cam Swing Arm 1 and Cam Swing Arm 2 swing out of the fixed bracket to catch Dumbbell Plate 1 and Dumbbell Plate 2, namely the reference signs A-1, A-2, B-1, B-2; the remaining cam swing arms are all within the fixed bracket of the protective cover, and the other dumbbell plates do not contact the cam swing arms;

[0047] At this time, when the dumbbell handle is lifted, Dumbbell Plate 1 and Dumbbell Plate 2 will be lifted together with the handle group; the other dumbbell plates remain in the bottom tray, completing this weight increment operation. As shown in the attached Figure 18 figure.

[0048] As shown in the attached Figure 19 figure, when the dumbbell is set to another weight increment heavier, continue to rotate the handle. The handle simultaneously drives the cam groups on both the left and right sides. Cam 1, Cam 2, and Cam 3 push Cam Swing Arm 1, Cam Swing Arm 2, and Cam Swing Arm 3 out of the fixed bracket of the protective cover, and Cam Swing Arm 1, Cam Swing Arm 2, and Cam Swing Arm 3 swing out of the fixed bracket to catch Dumbbell Plate 1, Dumbbell Plate 2, and Dumbbell Plate 3, namely the reference signs A-1, A-2, A-3, B-1, B-2, B-3; the remaining cam swing arms are all within the fixed bracket of the protective cover, and the other dumbbell plates do not contact the cam swing arms;

[0049] At this time, lift the dumbbell handle, and the first weight plate, the second weight plate, and the third weight plate will be lifted together with the handle set; the other weight plates remain in the bottom tray, completing this weight addition operation, as shown in the appendix Figure 20 as shown

[0050] as shown in the appendix Figure 21 As shown, when the dumbbell is selected to add one more weight level, continue to rotate the handle. The handle drives the cam groups on both the left and right sides at the same time. The cams push all the cam swing arms out of the fixed frame of the protective cover, and all the cam swing arms swing out of the fixed frame to hold all the weight plates

[0051] At this time, lift the dumbbell handle, and all the weight plates will be lifted together with the handle set; complete this weight addition operation, as shown in the appendix Figure 22 as shown

[0052] When the handle is continuously rotated, the handle drives the cam groups on both the left and right sides at the same time. Since the convex angles of each cam are different, under the action of the spring return tension, the cam swing arms are pulled back into the fixed frame of the protective cover, and all the dumbbell plates are disengaged from the cam swing arms, as shown in the appendix Figure 13 as shown

[0053] At this time, lift the dumbbell handle, and the weight plates remain in the bottom tray, that is, the weight of the handle set itself, as shown in the appendix Figure 14 as shown

[0054] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. The standard parts used can be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art, and the circuit connections adopt conventional connection methods in the prior art, which will not be elaborated here

[0055] The present utility model is not limited by the above-mentioned embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present utility model shall be equivalent replacement methods and shall be included within the protection scope of the present utility model

Claims

1. A dumbbell with quick weight adjustment, comprising a dumbbell handle assembly (1) and a dumbbell plate assembly (2), characterized in that: The dumbbell handle assembly (1) comprises a rotatable rotating handle (7), the left and right ends of the rotating handle (7) are both provided with an outer protective cover (4) and an inner protective cover (6), a protective cover fixing frame (5) is connected between the outer protective cover (4) and the inner protective cover (6), and the left and right sides of the rotating handle (7) are respectively provided with a left cam assembly (10) and a right cam assembly (11), the left cam assembly (10) and the right cam assembly (11) are placed in the protective cover fixing frame (5), and both are composed of at least two groups of cams, and the cams are rotated with the rotation of the rotating handle (7). The protective cover fixing frame (5) is placed in a dumbbell plate group (2), the dumbbell plate group (2) is composed of at least two dumbbell plates, the dumbbell plates are arranged corresponding to the cam, the cam is connected with a cam swing arm (8), the cam swing arm (8) swings outwards under the drive of the cam and enters the step (12) of the dumbbell plate, the cam swing arm (8) is connected to a reset spring (9), the other end of the reset spring (9) is fixed in the protective cover fixing frame (5), and the cam swing arm (8) that swings outwards is reset under the action of the reset spring (9).

2. The dumbbell with quick weight adjustment according to claim 1, characterized in that: The dumbbell plate group (2) is provided with a U-shaped groove (13) that matches the shape of the protective cover fixing frame (5); the protective cover fixing frame (5) is placed in the U-shaped groove (13) of the dumbbell plate group (2); and the step (12) of the dumbbell plate is arranged on one side of the bottom of the U-shaped groove (13).

3. The dumbbell with quick weight adjustment according to claim 1, characterized in that: The left and right ends of the rotating handle (7) pass through the inner protective cover (6), the protective cover fixing frame (5) and the outer protective cover (4) in sequence. The left and right ends of the rotating handle (7) are both provided with threads and are screwed onto the outer protective cover (4) through the threads.

4. The dumbbell with quick weight adjustment according to claim 1, 2 or 3, characterized in that: The dumbbell pieces of the dumbbell piece group (2) are placed in a bottom tray (3), a plurality of limit arc grooves (14) are provided in the bottom tray (3) according to the number of dumbbell pieces, each dumbbell piece is placed in a corresponding limit arc groove (14), and both sides of the groove opening of each limit arc groove (14) are provided with limit walls (15) for preventing the dumbbell piece from tilting.

5. The dumbbell with quick weight adjustment according to claim 4, characterized in that: A limiting recess (16) is provided at the bottom of each dumbbell plate, and a limiting boss (17) is provided on the inner bottom surface of the bottom tray (3) in contact with each dumbbell plate, wherein the limiting boss (17) is arranged corresponding to the limiting recess (16).

6. The dumbbell with quick weight adjustment according to claim 5, characterized in that: At least two groups of cams of the left cam group (10) and the right cam group (11) are staggered in sequence along the axial direction and staggered in sequence by a certain angle along the circumferential direction. When each cam of the left cam group (10) and the right cam group (11) rotates, the corresponding cam swing arm (8) is pushed out to different angles.

Images