Weight-adjustable dumbbell

Abstract

The weight-adjustable dumbbell comprises a dumbbell rod, dumbbell pieces and locking pieces, first limiting pieces are arranged at the left end and the right end of the dumbbell rod, a second limiting piece is arranged in the middle of the dumbbell rod, first sliding grooves matched with the dumbbell rod are formed in the bottoms of the dumbbell pieces, and external threads are arranged at the left end and the right end of the dumbbell rod. A second screw hole matched with the dumbbell rod is formed in the center of the locking piece, a gasket in sliding fit with the dumbbell piece is arranged between the locking piece and the dumbbell piece, a first boss is arranged at the right end of the dumbbell piece, and a positioning groove in sliding fit with the first boss is formed in the left end face of the dumbbell piece. A circular groove in sliding fit with the gasket is formed in the center of the first boss. The adjustable dumbbell has the advantages of being fast to assemble and disassemble, stable to lock and resistant to rolling, and solves the problems that a traditional adjustable dumbbell is tedious in operation, prone to loosening and inconvenient to store.

Description

Technical Field

[0001] This utility model relates to the field of dumbbell technology, specifically to an adjustable weight dumbbell. Background Technology

[0002] In the fitness world, dumbbells are a very common training tool, widely used to enhance muscle strength and endurance. Traditional dumbbell designs typically include a fixed weight, which limits their applicability because different training programs and individual physical conditions require different levels of resistance. Therefore, adjustable dumbbells have emerged, allowing users to adjust the weight by adding or removing weight plates according to their needs.

[0003] However, existing adjustable weight dumbbells have some inconveniences in practical use. For example, many models require complex operations to install and remove weight plates, such as repeatedly disassembling nuts or locks and replacing each plate one by one. This is not only time-consuming but also inefficient. Furthermore, due to the lack of an effective fixing mechanism, the weight plates are prone to loosening during high-intensity training, causing them to wobble and affecting the dumbbell's stability. Additionally, traditional dumbbell plates are mostly round, making them prone to rolling when not in use, increasing the risk of damage during storage and use. Therefore, an adjustable weight dumbbell is needed to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable dumbbell with the advantages of quick loading and unloading, stable locking, and anti-rolling design, which solves the problems of cumbersome operation, easy loosening, and inconvenient storage of traditional adjustable dumbbells.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable weight dumbbell, comprising a dumbbell bar, dumbbell plates, and a locking plate. The dumbbell bar has first limiting plates at its left and right ends, a second limiting plate at its middle section, a first sliding groove at the bottom of the dumbbell plates that mates with the dumbbell bar, external threads at both ends of the dumbbell bar, a second threaded hole at the center of the locking plate that mates with the dumbbell bar, a washer between the locking plate and the dumbbell plates that slides with the dumbbell plates, a first boss at the right end of the dumbbell plates, a positioning groove at the left end of the dumbbell plates that slides with the first boss, a circular groove at the center of the first boss that slides with the washer, and a second boss at the side end of the second limiting plate that mates with the positioning groove.

[0006] As a preferred embodiment of the adjustable weight dumbbell of this utility model, the left and right ends of the dumbbell bar are provided with first screw holes, and the side end face of the first limiting plate is provided with an external threaded post that mates with the first screw hole.

[0007] As a preferred embodiment of the adjustable weight dumbbell of this invention, the washer is made of rubber.

[0008] As a preferred embodiment of the adjustable weight dumbbell of this utility model, the upper end faces of the dumbbell plates and locking plates are provided with snap-fit ​​sealing caps, and the dumbbell plates and locking plates are filled with lead pellets.

[0009] As a preferred embodiment of the adjustable weight dumbbell of this utility model, the dumbbell plates are provided with finger holes evenly distributed, and the finger holes are elliptical in shape.

[0010] As a preferred embodiment of the adjustable weight dumbbell of this invention, the dumbbell plates are of a regular hexagonal structure.

[0011] As a preferred embodiment of the adjustable weight dumbbell of this utility model, the bottom of the locking plate is provided with a second sliding groove, a rubber plug and a spring are provided in the second sliding groove for sliding connection, the bottom of the second sliding groove is provided with an internal thread, and an adjusting bolt is provided at the bottom of the second sliding groove for threaded connection thereto, and the bottom of the adjusting bolt is provided with an internal hexagonal hole.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model achieves quick assembly and disassembly through the sliding engagement of the first groove at the bottom of the dumbbell plate with the dumbbell bar, combined with the locking plate, elastic washer, and threaded structure at both ends of the dumbbell bar. The user only needs to rotate the locking plate to push the washer axially to compress the stack of dumbbell plates. The elastic deformation of the washer generates continuous pressure, pressing the dumbbell plates tightly between the second limiting plate and the locking plate of the dumbbell bar. At the same time, the nested design of the first boss and the positioning groove on the side of the dumbbell plate, and the docking of the second boss and the positioning groove between the dumbbell plate and the second limiting plate, form a multi-directional interlock, ensuring no relative displacement between the dumbbell plates. This structure completely solves the cumbersome operation of repeatedly disassembling nuts or locks required by traditional dumbbells, realizing weight adjustment without tools or disassembling the locking plate. Users can instantly adjust the weight by adding or removing dumbbell plates, significantly improving training efficiency and flexibility.

[0014] 2. This utility model uses first limiting plates at both ends of the dumbbell bar, fixed by threaded posts, to form a physical barrier to prevent the locking plate from completely unscrewing and falling off. The rubber gasket is axially compressed during locking, and its rebound force continuously increases the friction between the threaded pairs, inhibiting the locking plate from self-spinning and loosening. The damping structure at the bottom of the locking plate is embedded in the thread gap of the dumbbell bar through a spring-preloaded rubber plug, forming rotational resistance. Users can adjust the spring pressure with adjusting bolts to adapt the damping strength, so that the locking plate maintains a state of "manual adjustment but anti-vibration self-rotation". These designs work together to effectively solve the problem of gradual loosening caused by equipment vibration in traditional threaded locking, ensuring the reliability of the equipment and the safety of users under high-intensity training. Attached Figure Description

[0015] Figure 1 This is a top view of the present invention;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 This is a right view of the dumbbell plate of this utility model;

[0019] Figure 5 This is a left view of the dumbbell plate of this utility model.

[0020] In the diagram: 1. Dumbbell bar; 101. First screw hole; 2. Dumbbell plate; 201. Sealing cap; 202. Lead pellet; 203. First groove; 204. First boss; 205. Circular groove; 206. Finger hole; 207. Positioning groove; 3. Locking piece; 301. Second screw hole; 302. Second groove; 303. Rubber plug; 304. Spring; 305. Adjusting bolt; 306. Socket headstock hole; 4. Washer; 5. First limiting piece; 501. External threaded post; 6. Second limiting piece; 602. Second boss. Detailed Implementation

[0021] Example 1

[0022] Please see Figures 1-5 An adjustable weight dumbbell includes a dumbbell bar 1, dumbbell plates 2, and a locking plate 3. First limiting plates 5 are provided at both ends of the dumbbell bar 1, and a second limiting plate 6 is provided in the middle of the dumbbell bar 1. A first sliding groove 203 that mates with the dumbbell bar 1 is provided at the bottom of the dumbbell plates 2. External threads are provided at both ends of the dumbbell bar 1. A second threaded hole 301 that mates with the dumbbell bar 1 is provided at the center of the locking plate 3. A washer 4 that slides between the locking plate 3 and the dumbbell plates 2 is provided, mates with the dumbbell plates 2. A first boss 204 is provided at the right end of the dumbbell plates 2, and a positioning groove 207 that slides with the first boss 204 is provided on the left end face of the dumbbell plates 2. A circular groove 205 that slides with the washer 4 is provided at the center of the first boss 204. A second boss 602 that mates with the positioning groove 207 is provided on the side end face of the second limiting plate 6.

[0023] Quickly insert dumbbell plates 2 into the dumbbell bar 1 through the first sliding groove 203 at the bottom. Then, rotate the locking plate 3 to push the washer 4 to gradually squeeze the dumbbell plates 2, thereby fixing the dumbbell plates 2 onto the dumbbell bar 1. Adjacent dumbbell plates 2 are connected by the first boss 204 and the positioning groove 207. Dumbbell plates 2 and the second limiting plate 6 are connected by the second boss 602 and the positioning groove 207. Finally, the washer 4 is inserted into the circular groove 205 to clamp and fix the dumbbell plates 2, preventing them from falling off. Users can adjust the number of dumbbell plates 2 inserted according to their needs to adjust the overall weight of the dumbbell. Simply loosen the locking plate 3 to quickly insert and remove the dumbbell plates 2 without removing the locking plate 3 to adjust each dumbbell plate individually, greatly improving the efficiency of dumbbell weight adjustment.

[0024] Furthermore, the left and right ends of the dumbbell bar 1 are provided with first screw holes 101, and the side end face of the first limiting piece 5 is provided with an external thread post 501 that mates with the first screw holes 101.

[0025] The first limiting piece 5 is installed at both ends of the dumbbell bar 1 through the cooperation of the external threaded post 501 and the first threaded hole 101, which limits the stroke of the locking piece 3, prevents the locking piece 3 from falling off after loosening, and improves the safety of the equipment.

[0026] Furthermore, washer 4 is made of rubber.

[0027] The silicone washer 4 has good elasticity, so that after the locking piece 3 is locked, the washer 4 can generate axial pressure on the locking piece 3, thereby increasing the friction between the threads and reducing the probability of the locking piece 3 loosening.

[0028] Furthermore, the upper surfaces of the dumbbell plate 2 and the locking plate 3 are provided with snap-fit ​​sealing caps 201, and the dumbbell plate 2 and the locking plate 3 are filled with lead pellets 202.

[0029] By filling the dumbbell plates 2 and locking plates 3 with lead pellets 202 for counterweight, it is less prone to corrosion, has a lower cost, and a longer service life compared to traditional metal dumbbells.

[0030] Furthermore, finger holes 206 are evenly distributed on the dumbbell plate 2, and the finger holes 206 have an elliptical structure.

[0031] By providing finger holes 206 on the dumbbell plate 2, it is convenient to insert fingers into the finger holes 206 to remove the dumbbell plate 2, thus avoiding the situation where the dumbbell plate 2 falls off due to insufficient friction when gripped from the side.

[0032] Furthermore, dumbbell plate 2 has a regular hexagonal structure.

[0033] The hexagonal dumbbell plate 2 prevents it from rolling when placed alone or as a whole, thus avoiding the dumbbells from rolling off and injuring the user or damaging the equipment.

[0034] Furthermore, the bottom of the locking plate 3 is provided with a second slide groove 302, and a rubber plug 303 and a spring 304 are provided in the second slide groove 302 for sliding connection. The bottom of the second slide groove 302 is provided with an internal thread, and an adjusting bolt 305 is provided at the bottom of the second slide groove 302 for threaded connection. The bottom of the adjusting bolt 305 is provided with an internal hexagonal hole 306.

[0035] The rubber plug 303, under the action of the spring 304, squeezes the thread gap on the surface of the dumbbell bar 1, thereby increasing the rotational resistance between the locking plate 3 and the dumbbell bar 1 and forming a damping effect. By rotating the adjusting bolt 305, the elastic force of the spring 304 is adjusted, thereby adjusting the damping magnitude, so that the locking plate 3 is in a state where it can rotate but is not easy to rotate on its own, preventing the locking plate 3 from loosening during use.

[0036] When using this dumbbell, first determine the required weight based on your needs. Place the dumbbell bar 1 stably, and quickly insert the dumbbell plates 2 onto the dumbbell bar 1 through the first sliding groove 203 at the bottom. Because the dumbbell plates 2 have a regular hexagonal structure, they are less likely to roll during placement, making operation more stable. Adjacent dumbbell plates 2 are connected by a first boss 204 and a positioning groove 207, and the dumbbell plates 2 and the second limiting plate 6 are connected by a second boss 602 and a positioning groove 207, ensuring accurate installation of the dumbbell plates 2. Next, insert the rubber washer 4 into the circular groove 205 in the center of the first boss 204 of the dumbbell plate 2. The good elasticity of the washer 4 generates axial pressure during subsequent tightening, increasing thread friction. Then, rotate both ends of the dumbbell bar 1. The locking plate 3 with the second screw hole 301 pushes the washer 4 to gradually squeeze the dumbbell plate 2, fixing the dumbbell plate 2 onto the dumbbell bar 1. At the same time, the first limiting plate 5 is installed through the external thread post 501 and the first screw holes 101 at both ends of the dumbbell bar 1, limiting the sliding stroke of the locking plate 3 and preventing it from loosening and falling off. If the rotation resistance of the locking plate 3 is not suitable, an Allen wrench can be used to turn the adjusting bolt 305 in the second slide groove 302 at the bottom of the locking plate 3. By adjusting the elasticity of the spring 304, the squeezing force of the rubber plug 303 on the thread gap of the dumbbell bar 1 can be changed, thus adjusting the damping. During use, if it is necessary to adjust the weight of the dumbbell again, gently loosen the locking plate 3, and insert your fingers into the oval finger holes 206 on the dumbbell plate 2 to quickly insert and remove the dumbbell plate 2 to increase or decrease the weight.

[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adjustable weight dumbbell, comprising a dumbbell bar (1), dumbbell plates (2), and a locking plate (3), characterized in that: The dumbbell bar (1) has first limiting plates (5) at both ends, a second limiting plate (6) at the middle, and a first sliding groove (203) at the bottom of the dumbbell plate (2) that mates with the dumbbell bar (1). The dumbbell bar (1) has external threads at both ends, and a second threaded hole (301) at the center of the locking plate (3) that mates with the dumbbell bar (1). A space is provided between the locking plate (3) and the dumbbell plate (2). The washer (4) slides with the dumbbell plate (2). The right end of the dumbbell plate (2) is provided with a first boss (204). The left end face of the dumbbell plate (2) is provided with a positioning groove (207) that slides with the first boss (204). The center of the first boss (204) is provided with a circular groove (205) that slides with the washer (4). The side end face of the second limiting piece (6) is provided with a second boss (602) that mates with the positioning groove (207).

2. The adjustable weight dumbbell as described in claim 1, characterized in that: The dumbbell bar (1) has a first screw hole (101) at both ends, and the side end face of the first limiting piece (5) has an external thread post (501) that mates with the first screw hole (101).

3. The adjustable weight dumbbell as described in claim 1, characterized in that: The washer (4) is made of rubber.

4. The adjustable weight dumbbell as described in claim 1, characterized in that: The upper surfaces of the dumbbell plate (2) and the locking plate (3) are provided with snap-fit ​​sealing caps (201), and the dumbbell plate (2) and the locking plate (3) are filled with lead pellets (202).

5. The adjustable weight dumbbell as described in claim 1, characterized in that: The dumbbell plate (2) is provided with finger holes (206) evenly distributed on it, and the finger holes (206) are elliptical in shape.

6. The adjustable weight dumbbell as described in claim 1, characterized in that: The dumbbell plate (2) has a regular hexagonal structure.

7. The adjustable weight dumbbell as described in claim 1, characterized in that: The bottom of the locking piece (3) is provided with a second slide groove (302), and a rubber plug (303) and a spring (304) are provided in the second slide groove (302). The bottom of the second slide groove (302) is provided with an internal thread, and the bottom of the second slide groove (302) is provided with an adjusting bolt (305) that is threadedly connected to it. The bottom of the adjusting bolt (305) is provided with an internal hexagonal hole (306).

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