Dumbbell capable of preventing dumbbell pieces from rotating

Abstract

The dumbbell comprises a dumbbell rod, dumbbell piece bodies, threaded rods, nuts and locking assemblies, the dumbbell rod is a hollow inner threaded pipe, threaded connectors are arranged at the two ends of the dumbbell rod and used for being connected with the threaded rods, the number of the threaded rods is two, and the two threaded rods are installed at the two ends of the dumbbell rod respectively. One end of the threaded rod is in threaded connection with the threaded connector of the dumbbell rod, external threads are arranged at the other end of the threaded rod and used for being matched with a nut, the threaded rod is of a hollow structure, a strip-shaped groove for containing the locking assembly is formed in the outer wall of the threaded rod, a through hole is formed in the middle of the dumbbell piece body, and a clamping protrusion and a groove matched with the locking assembly are formed in the through hole. The locking assembly is installed in the threaded rod, an elastic buckle part in the locking assembly protrudes out of the strip-shaped groove in the threaded rod, and the shape of the elastic buckle is matched with the shape of the clamping protrusion of the dumbbell piece body. The dumbbell piece body is clamped through the locking assemblies, rotation and left-right shaking are prevented, and the dumbbell piece is simple, reliable and easy and convenient to mount and dismount.

Description

Technical Field

[0001] This utility model relates to the field of sports equipment technology, and in particular to a dumbbell that prevents the dumbbell plates from rotating. Background Technology

[0002] Existing dumbbells typically consist of a dumbbell bar, dumbbell plates, and nuts for securing the plates. The dumbbell bar usually has threaded rods fixed or formed at both ends. The dumbbell plates are screwed onto the threaded rods at both ends of the dumbbell bar through threaded holes, and the nuts are then screwed onto the threaded rods to secure the plates. Users can add or remove dumbbell plates according to their needs. However, a drawback of existing dumbbells is that the dumbbell bar secures the plates with a single rod, which can easily cause the plates to rotate. If the plates loosen, the bolts may come loose, potentially causing the plates to fall off during exercise, affecting training effectiveness and potentially creating a safety hazard. Therefore, there is a need to develop a dumbbell that prevents the plates from rotating. Utility Model Content

[0003] The purpose of this invention is to provide a dumbbell that prevents the dumbbell plates from rotating. The dumbbell plates are locked in place by a locking assembly to prevent rotation and swaying. The invention is simple, reliable, and easy to install and remove.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model discloses a dumbbell for preventing dumbbell plates from rotating, comprising a dumbbell bar, a dumbbell plate body, a threaded rod, a nut, and a locking assembly. The dumbbell bar is a hollow internally threaded tube with threaded interfaces at both ends for connection to the threaded rod. Two threaded rods are provided, respectively installed at both ends of the dumbbell bar. One end of the threaded rod is threadedly connected to the threaded interface of the dumbbell bar, and the other end is provided with an external thread for engaging with the nut. The threaded rod has a hollow internal structure, and a strip-shaped groove for housing the locking assembly is provided on the outer wall of the threaded rod. The dumbbell plate body has a through hole in the middle, and the through hole has a locking protrusion and a groove that engage with the locking assembly. The locking assembly is installed inside the threaded rod, and the elastic buckle portion of the locking assembly protrudes from the strip-shaped groove on the threaded rod. The shape of the elastic buckle matches the locking protrusion on the dumbbell plate body.

[0006] Preferably, the dumbbell bar has anti-slip protrusions on its exterior.

[0007] Preferably, the protrusion and the groove are located on the same horizontal line, the protrusion is located at the front end of the through hole, the groove is located at the rear end, and the steps of the protrusion and the groove form a slope.

[0008] Preferably, the locking assembly further includes a sliding rod, a first spring, a limiting block, and a button. The sliding rod is installed at the bottom of the threaded rod, and the front end of the sliding rod passes through the threaded rod. The first spring is installed between the sliding rod and the threaded rod and is fitted onto the sliding rod. An elastic buckle is installed at the rear end of the sliding rod, and a button is installed at the rear end of the elastic buckle. A limiting block is provided on the outside of the button. One end of the limiting block is installed at the outer end of the threaded rod, and the other end of the limiting block is installed inside the threaded rod.

[0009] Preferably, the elastic buckle is provided with a plurality of spring units, and a second spring is installed between the spring units. The two ends of the second spring are sleeved on the spring post. The spring unit has an M-shaped structure. The upper horizontal part of the spring unit is provided with a protrusion. The protrusion is provided with a plurality of square holes on the groove corresponding to the threaded rod. The number of square holes matches the number of protrusions of the spring unit. The protrusion extends out of the square holes. The middle of the vertical support leg of the spring unit is hollow to facilitate the passage of the second spring.

[0010] Preferably, the foremost spring post is fixedly connected to the inner side of the front end of the reed unit, the rearmost spring post is fixedly connected to the front end of the button, and the two ends of the second spring are fitted onto the spring post.

[0011] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0012] This invention relates to a dumbbell that prevents the dumbbell plates from rotating. Through the engagement of a locking component and the locking protrusions and grooves on the dumbbell plate body, it restricts the rotation of the dumbbell plate body and prevents the dumbbell plate from wobbling horizontally, thus avoiding the risk of the dumbbell plate falling off during use. This improves the safety of the dumbbell plate during use. The locking component design also makes the installation and removal of the dumbbell plate more convenient, allowing users to adjust the weight of the dumbbell according to their training needs. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the dumbbell that prevents the dumbbell plates from rotating, according to the present invention.

[0015] Figure 2 This is a schematic diagram of the main structure of the dumbbell used to prevent the dumbbell plates from rotating, according to the present invention.

[0016] Figure 3 This is a schematic diagram of the main sectional view of the dumbbell structure for preventing dumbbell plates from rotating according to the present invention;

[0017] Figure 4This is a three-dimensional structural diagram of the dumbbell plate body of this utility model;

[0018] Figure 5 This is a schematic diagram of the three-dimensional installation structure of the locking component and the dumbbell plate body of this utility model;

[0019] Figure 6 This is a schematic diagram of the three-dimensional separation structure of the locking component and the dumbbell plate body of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Dumbbell bar; 2. Dumbbell plate body; 201. Through hole; 202. Snap protrusion; 203. Groove; 204. Bevel; 3. Threaded bar; 301. Strip groove; 302. Square hole; 4. Nut; 5. Locking assembly; 501. Elastic buckle; 5021. Spring unit; 5022. Second spring; 5023. Protrusion; 5024. Spring post; 502. Sliding rod; 503. First spring; 504. Limiting block; 505. Button. Detailed Implementation

[0021] The core of this invention is to provide a dumbbell that prevents the dumbbell plates from rotating. The dumbbell plates are locked in place by a locking assembly to prevent rotation and swaying. This invention is simple, reliable, and easy to install and remove.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0024] Refer to the attached diagram. Figure 1 This is a schematic diagram of the three-dimensional structure of the dumbbell that prevents the dumbbell plates from rotating, according to the present invention. Figure 2 This is a schematic diagram of the main structure of the dumbbell used to prevent the dumbbell plates from rotating, according to the present invention. Figure 3 This is a schematic diagram of the main sectional view of the dumbbell structure for preventing dumbbell plates from rotating according to the present invention; Figure 4 This is a three-dimensional structural diagram of the dumbbell plate body of this utility model; Figure 5This is a schematic diagram of the three-dimensional installation structure of the locking component and the dumbbell plate body of this utility model; Figure 6 This is a schematic diagram of the three-dimensional separation structure of the locking component and the dumbbell plate body of this utility model.

[0025] In one specific implementation, such as Figures 1-6 As shown, a dumbbell designed to prevent the dumbbell plates from rotating includes a dumbbell bar 1, a dumbbell plate body 2, a threaded rod 3, a nut 4, and a locking assembly 5. The dumbbell bar 1 is a hollow, internally threaded tube with threaded interfaces at both ends for connection to the threaded rod 3. Two threaded rods 3 are provided, one at each end of the dumbbell bar 1. The dumbbell bar 1 has anti-slip protrusions on its exterior. These protrusions are located where the exerciser's hands grip, and the area of ​​the protrusions is larger than the exerciser's usability area to prevent injury to themselves or others due to slippage during use.

[0026] In one specific implementation, such as Figures 1-6 As shown, one end of the threaded rod 3 is threadedly connected to the threaded interface of the dumbbell rod 1, and the other end is provided with an external thread for mating with the nut 4. The threaded rod 3 has a hollow internal structure, and a slot 301 for housing the locking component 5 is provided on the outer wall of the threaded rod 3. The dumbbell plate body 2 has a through hole 201 in the middle, and the through hole 201 has a latching protrusion 202 and a groove 203 that mate with the locking component 5. The locking component 5 is installed inside the threaded rod 3, and the elastic buckle 501 in the locking component 5 protrudes from the slot 301 on the threaded rod 3. The shape of the elastic buckle 501 matches the latching protrusion 202 of the dumbbell plate body 2 to allow the dumbbell plate body 2 to rotate.

[0027] Specifically, the protrusion 202 and the groove 203 on the dumbbell plate body 2 are located on the same horizontal line. The protrusion 202 is located at the front end of the through hole 201, and the groove 203 is located at the rear end. The steps of the protrusion 202 and the groove 203 form a slope 204.

[0028] In one specific implementation, such as Figures 1-6 As shown, the locking assembly 5 also includes a sliding rod 502, a first spring 503, a limiting block 504, and a button 505. The sliding rod 502 is installed at the bottom of the threaded rod 3, with its front end passing through the threaded rod 3. The first spring 503 is installed between the sliding rod 502 and the threaded rod 3, and is fitted onto the sliding rod 502. An elastic buckle 501 is installed at the rear end of the sliding rod 502, with its front end fixedly connected to the rear end of the sliding rod 502. A button 505 is installed at the rear end of the elastic buckle 501, with a limiting block 504 on its outer side, and the button 505 is fixedly installed within the limiting block 504. One end of the limiting block 504 is installed at the outer end of the threaded rod 3, and the other end is installed inside the threaded rod 3. This prevents the button 505 from disengaging from the threaded rod 3 when retracting.

[0029] In one specific implementation, such as Figures 1-6 As shown, the elastic buckle 501 has several spring units 5021, and a second spring 5022 is installed between the spring units 5021. The spring units 5021 have an M-shaped structure. The upper horizontal part of the spring unit 5021 has a protrusion 5023. Each protrusion 5023 has several square holes 302 on the corresponding slot 301 of the threaded rod 3. The number of square holes 302 matches the number of protrusions 5023 of the spring unit 5021. The protrusions 5023 extend out of the square holes 302. The middle of the vertical support leg of the spring unit 5021 is hollow to facilitate the passage of the second spring 5022. And it does not interfere with the second spring 5022 when the spring unit 5021 moves up and down.

[0030] In one specific implementation, such as Figures 1-6 As shown, the foremost spring post 5024 is fixedly connected to the inner side of the front end of the reed unit 5021, the rear spring post 5024 is fixedly connected to the front end of the button 505, and the two ends of the second spring 5022 are fitted onto the spring post 5024.

[0031] The process of using this dumbbell to prevent dumbbell plates from rotating is as follows: During operation, this type of dumbbell consists of a dumbbell bar 1 and a threaded bar 3. Both ends of the dumbbell bar 1 are threadedly connected to the threaded bar 3. A groove 301 is provided on the outer surface of the threaded bar 3, and the dumbbell plate body 2 is mounted on the threaded bar 3. A locking protrusion 202 is provided on one side of the through hole 201 of the dumbbell plate body 2. During installation, the locking protrusion 202 is installed along the direction of the groove 301, so that the locking protrusion 202 is engaged in the groove 301. Within the groove 301, there is a protrusion 5023 of the elastic buckle 501 in the locking assembly 5. Pressing the button 505 on the head compresses the first spring 503 and the second spring 5022 inside. Under the action of the second spring 5022, the elastic buckle 501 falls into the interior of the threaded bar 3. The front end of the desired dumbbell plate body 2 is then placed against the end face of the dumbbell bar 1. Release button 505. Under the action of the first spring 503 and the second spring 5022, the elastic buckle 501 moves backward, and the protrusion 5023 on the elastic buckle 501 pops out from the hole in the threaded rod 3 and falls into the slot of the dumbbell plate body 2. The front end of the protrusion 5023 on the elastic buckle 501 abuts against the rear inclined surface 204 of the locking protrusion 202. This prevents the dumbbell plate from rotating and allows each installed dumbbell plate to retract. After installing the dumbbell plate body 2, the nut 4 is installed at the tail end for reinforcement to prevent slippage. When removing the dumbbell plate body 2, first unscrew the nut 4 at the tail end, then press button 505 inward to make the elastic buckle 501 fall into the threaded rod 3. The dumbbell plate body 2 can then be removed by simply retracting it. It is safe and convenient to use. Anti-slip protrusions 5023 are also provided on the outside of the dumbbell rod 1 to increase the friction with the hand and prevent it from falling off.

[0032] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0033] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A dumbbell for preventing rotation of the dumbbell plate, comprising a dumbbell rod (1), a dumbbell plate body (2), a threaded rod (3), a nut (4) and a locking assembly (5), characterized in that: The dumbbell rod (1) is a hollow internal thread pipe, both ends are provided with threaded interfaces, used for connecting with the threaded rods (3), the threaded rods (3) are provided with two, respectively installed at both ends of the dumbbell rod (1), one end of the threaded rod (3) is threadedly connected with the threaded interface of the dumbbell rod (1), the other end is provided with external threads, used for cooperating with the nut (4), the threaded rod (3) is a hollow structure, the outer wall of the threaded rod (3) is provided with a strip-shaped groove (301) for placing the locking assembly (5), the dumbbell piece body (2) is provided with a through hole (201) in the middle, the through hole (201) is provided with a clamping convex (202) and a groove (203) matched with the locking assembly (5), the locking assembly (5) is installed in the interior of the threaded rod (3), the elastic buckle (501) in the locking assembly (5) partially protrudes from the strip-shaped groove (301) on the threaded rod (3), the shape of the elastic buckle (501) is matched with the clamping convex (202) of the dumbbell piece body (2).

2. The dumbbell of claim 1, wherein: The dumbbell rod (1) is provided with anti-skid convex points on the outside.

3. The dumbbell of claim 1, wherein: The clamping convex (202) and the groove (203) are located on the same horizontal line, the clamping convex (202) is located at the front end of the through hole (201), the groove (203) is located at the rear end, and the clamping convex (202) and the groove (203) form an inclined surface (204) at the step.

4. The dumbbell of claim 1, wherein: The locking assembly (5) further comprises a sliding rod (502), a first spring (503), a limiting block (504) and a button (505), the sliding rod (502) is installed at the bottom of the threaded rod (3), the front end of the sliding rod (502) penetrates the threaded rod (3), the first spring (503) is installed between the sliding rod (502) and the threaded rod (3), the first spring (503) is sleeved on the sliding rod (502), the rear end of the sliding rod (502) is installed with the elastic buckle (501), the rear end of the elastic buckle (501) is installed with the button (505), the outer side of the button (505) is provided with the limiting block (504), one end of the limiting block (504) is installed at the outer end of the threaded rod (3), the other end of the limiting block (504) is installed in the interior of the threaded rod (3).

5. The dumbbell of claim 4, wherein: The elastic buckle (501) is provided with a plurality of reed units (5021), the reed units (5021) are provided with second springs (5022), the two ends of the second springs (5022) are sleeved on spring columns (5024), the reed units (5021) are m-shaped structures, the horizontal direction upper end of the reed units (5021) is provided with a protrusion (5023), the protrusion (5023) is provided with a plurality of displacement square holes (302) corresponding to the strip-shaped grooves (301) of the threaded rods (3), the number of the square holes (302) matches the number of the protrusions (5023) of the reed units (5021), the protrusion (5023) protrudes from the square hole (302), and the vertical direction foot of the reed unit (5021) is a hollow structure, facilitating the second spring (5022) to pass through.

6. The dumbbell of claim 5, wherein: The front end of the spring column (5024) is fixedly connected to the inner side of the front end of the reed unit (5021), the rear end of the spring column (5024) is fixedly connected to the front end of the button (505), and the two ends of the second spring (5022) are sleeved on the spring column (5024).

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