Dumbbell and dumbbell assembly

Abstract

The utility model provides a dumbbell and a dumbbell assembly. The dumbbell comprises a body, two counterweight assemblies arranged at the two opposite ends of the body respectively and an adjusting assembly arranged on the body. The adjusting assembly comprises a limiting rod and a gear rod slidably arranged on the limiting rod in a sleeving mode, the gear rod is provided with an adjusting channel and a plurality of adjusting protruding positions communicated with the adjusting channel in the length direction of the gear rod, and an adjusting handle is arranged on the limiting rod and is slidably connected with the adjusting channel; the limiting rod is further provided with a channel, the adjusting handle is provided with a limiting protruding block, and the inner diameter of the limiting protruding block is matched with the inner diameter of the adjusting protruding position. The counterweight assembly is provided with an installation channel matched with the limiting rod. When the weight of the counterweight assembly is adjusted, the adjusting handle is vertically pressed to enable the limiting protruding block to be separated from the adjusting protruding position, then the adjusting handle is horizontally slid on the adjusting channel, the limiting rod is driven to penetrate through the mounting channel and stretch into different lengths in the mounting channel, the number of counterweight pieces forming the counterweight assembly is limited, and the weight of the dumbbell is adjusted.

Description

[Technical Field]

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

[0002] Dumbbells are common fitness equipment and a frequently used auxiliary tool for enhancing muscle strength training. Currently available dumbbells can be divided into fixed-weight and adjustable-weight types. The most common adjustment method for adjustable dumbbells involves attaching weight plates to the dumbbell bar according to the desired weight and then locking the plates with a clamping nut. This method requires repeated manual removal and installation of the weight plates, which is cumbersome. Alternatively, a rotating telescopic tube can be used to adjust the number of fixed weight plates, but the telescopic tube is not easy to precisely adjust the extension length during use and is not very convenient. Therefore, to solve this problem, there is an urgent need for a new type of dumbbell with a simple structure and a more convenient weight adjustment method. [Utility Model Content]

[0003] To address the problem of inconvenient weight adjustment in existing adjustable dumbbells, this invention provides a dumbbell and dumbbell assembly.

[0004] This utility model provides a dumbbell that solves a technical problem. The dumbbell includes a body, two counterweight components respectively disposed at opposite ends of the body, and an adjustment component disposed on the body. The adjustment component includes a limiting rod and a stop rod slidably sleeved on the limiting rod. The stop rod has an adjustment channel along its length and several adjustment protrusions communicating with the adjustment channel. The limiting rod has an adjustment handle exposed above the stop rod, and the adjustment handle is slidably connected to the adjustment channel. The limiting rod also has a channel. The adjustment handle includes a first part and a second part sequentially connected from the limiting rod towards the stop rod. The first part is slidably disposed within the channel, and the second part has a limiting protrusion whose inner diameter matches the inner diameter of the adjustment protrusion. The counterweight component has an installation channel that matches the limiting rod.

[0005] Preferably, the counterweight assembly includes a plurality of counterweight plates; each counterweight plate has a mounting hole corresponding to the limiting rod, and the plurality of mounting holes form the mounting channel.

[0006] Preferably, the channel is provided with a step, and the first part is provided with a limiting base, which is connected to the limiting protrusion. The inner diameter of the limiting base is larger than the inner diameter of the adjusting protrusion.

[0007] Preferably, a first elastic member is sleeved on the first part, with one end of the first elastic member abutting against the limiting base and the other end abutting against the step.

[0008] Preferably, the body includes a grip and a fixing plate disposed at opposite ends of the grip. One side of the fixing plate is connected to the end of the grip and the gear lever, and the other side is detachably connected to the counterweight assembly.

[0009] Preferably, a dovetail groove is formed on one side of the counterweight plate, and a dovetail protrusion matching the dovetail groove is provided on the opposite side; and on the side of the fixing plate and the adjacent counterweight plate that are close to each other, one side is provided with the dovetail groove and the other side is provided with the dovetail protrusion.

[0010] Preferably, the dumbbell further includes an adjustable counterweight plate detachably disposed on the side of the fixing plate away from the counterweight plate, the adjustable counterweight plate being provided with a pin, and the fixing plate being provided with a corresponding insertion hole for the pin.

[0011] Preferably, the pin is a reset-type indexing pin.

[0012] To solve the above-mentioned technical problems, this utility model also provides a dumbbell assembly, including a base, a support frame, and a dumbbell as described above; the base and the support frame are detachably connected, and the support frame is disposed at both ends of the base and connected to the end of the counterweight assembly away from the adjustment assembly.

[0013] Preferably, the base has a plurality of adjustment holes along the length of the stop lever, and the support frame has a mating component that engages with a single adjustment hole to connect and fix the base and the support frame.

[0014] Compared with the prior art, the dumbbell and dumbbell assembly of this invention have the following advantages:

[0015] 1. The dumbbell provided by this utility model includes a body, two counterweight components respectively disposed at opposite ends of the body, and an adjustment component disposed on the body; the adjustment component includes a limiting rod and a stop rod slidably sleeved on the limiting rod, the stop rod having an adjustment channel along its length and a plurality of adjustment protrusions communicating with the adjustment channel, the limiting rod having an adjustment handle exposed outside the stop rod, the adjustment handle being slidably connected to the adjustment channel; the limiting rod also has a channel, the adjustment handle including a first part and a second part sequentially connected from the limiting rod toward the stop rod, the first part being slidably disposed within the channel, the second part... The weight assembly is equipped with a limiting protrusion, the inner diameter of which matches the inner diameter of the adjusting protrusion. The weight assembly has an installation channel that matches the limiting rod. When adjusting the weight of the weight assembly, the adjusting handle is pressed vertically to disengage the limiting protrusion from the adjusting protrusion. Then, the adjusting handle is slid horizontally along the adjusting channel, causing the limiting rod to pass through the installation channel and extend to different lengths within it. Afterward, the adjusting handle is released, causing the limiting protrusion to engage with the adjusting protrusion, thus fixing the length of the limiting rod. This limits the number of weight plates constituting the weight assembly, allowing for weight adjustment of the dumbbell. The structure is simple and the operation is convenient.

[0016] 2. The dumbbell counterweight assembly provided by this utility model includes several counterweight plates, and mounting holes are opened on the counterweight plates corresponding to the limiting rods. Multiple mounting holes form a mounting channel. The weight of a single counterweight plate is not limited. The end of the limiting rod away from the adjusting handle extends and retracts within the mounting channel to limit the number of counterweight plates, so as to adjust the weight of the dumbbell.

[0017] 3. The dumbbell provided by this utility model has a step inside the channel, and a limiting base is provided on the first part. The limiting base is connected to the limiting protrusion. The inner diameter of the limiting base matches the inner diameter of the step, and the inner diameter of the limiting base is larger than the inner diameter of the adjusting protrusion. The step inside the channel that matches the inner diameter of the limiting base is to limit the left and right movement of the limiting base, thereby limiting the movement of the limiting protrusion, ensuring that the limiting protrusion can accurately and vertically enter the adjusting protrusion. At the same time, the fact that the inner diameter of the limiting base is larger than the inner diameter of the adjusting protrusion ensures that the adjusting handle can always move inside the channel and will not come off.

[0018] 4. The dumbbell provided by this utility model has a first elastic element fitted on the first part, one end of the first elastic element abutting against the limiting base and the other end abutting against the step; so that the adjusting handle can be pressed down axially, and can be reset by the restoring force of the first elastic element after being released.

[0019] 5. The dumbbell body provided by this utility model includes a grip bar and fixed plates disposed at opposite ends of the grip bar. One side of the fixed plate is connected to the end of the grip bar and the shift lever, and the other side is detachably connected to the counterweight assembly. The grip bar provides a gripping part for the user during exercise, and the fixed plates realize the connection and support fixation of the counterweight assembly, the grip bar, and the adjustment assembly.

[0020] 6. The dumbbell provided by this utility model has a dovetail groove on one side of the counterweight plate and a dovetail protrusion matching the dovetail groove on the opposite side. The dovetail groove on the counterweight plate can engage with the dovetail protrusion of the adjacent counterweight plate to achieve fixed engagement of the adjacent counterweight plates. The cooperation between the dovetail groove and the dovetail protrusion provides a unidirectional limit, that is, the adjacent counterweight plates can be disengaged from bottom to top, while they will be fixed from top to bottom. When the limit rod does not enter a certain counterweight plate, the dumbbell is lifted, and the outermost counterweight plate will automatically disengage from the counterweight plate that is not matched with the limit rod in the lifting direction. Moreover, on the side of the fixing plate and the adjacent counterweight plates that are close to each other, one side is provided with a dovetail groove and the other side is provided with a dovetail protrusion. The fixing plate and the counterweight assembly are connected by a snap-fit ​​connection to achieve axial fixation of the counterweight plates.

[0021] 7. The dumbbell provided by this utility model also includes an adjustable counterweight plate that is detachably mounted on the side of the fixed plate away from the counterweight plate. The adjustable counterweight plate is provided with a pin, and the fixed plate is provided with a corresponding insertion hole. The adjustable counterweight plate is detachably connected to the main body. The weight of the adjustable counterweight plate is less than the weight of the counterweight plate, so as to make it easier to adjust the weight of the dumbbell, so that the range of adjustable weight specifications is wider and the adjustment sensitivity is higher.

[0022] 8. The dumbbell pin provided by this utility model is a reset-type indexing pin; the indexing pin is a simple and durable positioning device. When positioning is required, the indexing pin will extend and fit tightly with the insertion hole on the fixed plate to lock the position of the adjusting counterweight; when the adjusting counterweight is not used, the indexing pin can be removed to easily separate the fixed plate from the adjusting counterweight; this design is convenient to operate and the connection between the adjusting counterweight and the fixed plate is stable.

[0023] 9. This utility model also provides a dumbbell assembly, including a base, a support frame, and a dumbbell as described above; the base and the support frame are detachably connected, the support frame is disposed at both ends of the base and connected to the end of the counterweight assembly away from the adjustment assembly; the dumbbell is housed in the base, and the support frame fits against both ends of the counterweight assembly to limit, support, and fix the dumbbell, which is conducive to the storage and assembly of the dumbbell; it has the same beneficial effects as the dumbbell described above, and will not be repeated here.

[0024] 10. The dumbbell assembly provided by this utility model has a base with several adjustment holes along the length of the shift bar, and a support frame with a mating part. The mating part and a single adjustment hole are mated to connect and fix the base and the support frame. When the counterweight assembly contains different numbers of counterweight plates, the position of the mating part and the adjustment hole are adjusted to achieve flexible engagement. [Attached Image Description]

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional structural diagram of the dumbbell provided in the first embodiment of this utility model.

[0027] Figure 2 This is an exploded view of the dumbbell provided in the first embodiment of this utility model.

[0028] Figure 3 This is a cross-sectional view of the dumbbell provided in the first embodiment of this utility model. Figure 1 .

[0029] Figure 4 yes Figure 3 A magnified view of A in the middle.

[0030] Figure 5 This is a three-dimensional structural diagram of the adjustable handle of the dumbbell provided in the first embodiment of this utility model.

[0031] Figure 6 This is a cross-sectional view of the dumbbell provided in the first embodiment of this utility model. Figure 2 .

[0032] Figure 7 yes Figure 6 A magnified view of B in the middle.

[0033] Figure 8 This is a three-dimensional structural diagram of the dumbbell pin provided in the first embodiment of this utility model.

[0034] Figure 9 This is a three-dimensional structural diagram of the dumbbell assembly provided in the second embodiment of this utility model.

[0035] Figure 10 This is a three-dimensional schematic diagram of the base and support frame of the dumbbell assembly provided in the second embodiment of this utility model.

[0036] Figure 11 This is a partially exploded view of the dumbbell assembly provided in the second embodiment of this utility model.

[0037] Explanation of reference numerals in the attached diagram:

[0038] 1. Dumbbell; 2. Dumbbell assembly;

[0039] 10. Main body; 11. Counterweight assembly; 12. Adjustment assembly; 13. Adjustment counterweight plate; 20. Base; 21. Support frame;

[0040] 100. Handle; 101. Fixing plate; 110. Counterweight; 111. Mounting channel; 120. Limiting rod; 121. Gear lever; 122. Adjusting handle; 130. Pin; 131. Fixing hole; 200. Adjusting hole; 210. Mating part;

[0041] 1000, Limiting protrusion; 1010, Insertion hole; 1100, Mounting hole; 1101, Dovetail protrusion; 1102, Dovetail groove; 1200, Channel; 1201, Step; 1210, Adjustment channel; 1211, Adjustment protrusion; 1220, First part; 1221, Second part; 1222, Limiting protrusion; 1223, First elastic element; 1224, Limiting base; 1300, Movable rod; 1301, Fixing sleeve; 1302, Operating handle; 1303, Connector; 1304, Second elastic element.

Detailed Implementation Methods

[0042] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0043] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0044] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0045] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0046] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0047] Please refer to Figures 1 to 5 The dumbbell 1 provided in the first embodiment of this utility model includes a body 10, two counterweight components 11 respectively disposed at opposite ends of the body 10, and an adjustment component 12 disposed on the body 10. The adjustment component 12 includes a limiting rod 120 and a stop rod 121 slidably sleeved on the limiting rod 120. The stop rod 121 has an adjustment channel 1210 along its length and a plurality of adjustment protrusions 1211 communicating with the adjustment channel 1210. The limiting rod 120 has an adjustment handle 122 exposed above the stop rod 121, and the adjustment handle 122 is slidably connected to the adjustment channel 1210. The limiting rod 120 is also provided with a channel 1200. The adjustment handle 122 includes a first part 1220 and a second part 1221 connected sequentially from the limiting rod 120 toward the stop rod 121. The first part 1220 is slidably disposed in the channel 1200. Within the second part 1221, a limiting protrusion 1222 is provided, the inner diameter of which matches the inner diameter of the adjusting protrusion 1211. The counterweight assembly 11 is provided with an installation channel 111 that matches the limiting rod 120. When it is necessary to adjust the weight of the counterweight assembly 11, the adjusting handle 122 is pressed vertically to disengage the limiting protrusion 1222 from the adjusting protrusion 1211. Then, the adjusting handle 122 is slid horizontally on the adjusting channel 1210 to drive the limiting rod 120 through the installation channel 111 and extend and retract to different lengths within the installation channel 111. After that, the adjusting handle 122 is released to engage and position the limiting protrusion 1222 with the adjusting protrusion 1211, thereby fixing the length of the limiting rod 120. This limits the number of counterweight plates 110 constituting the counterweight assembly 11, thus adjusting the weight of the dumbbell 1. The structure is simple and the operation is convenient.

[0048] Understandably, an adjustment component 12 can only adjust and control the weight of one counterweight component 11. Therefore, for a dumbbell 1 with two counterweight components 11 respectively set at both ends of the main body 10, in principle, at least two adjustment components 12 should be set to correspond to the two counterweight components 11 respectively, so that the weight of the two counterweight components 11 can be adjusted according to the user's needs.

[0049] Further, please refer to Figure 2 and Figure 3The counterweight assembly 11 includes several counterweight plates 110. Each counterweight plate 110 has a mounting hole 1100 corresponding to a limiting rod 120. The multiple mounting holes 1100 form a mounting channel 111. The weight of a single counterweight plate 110 is not limited. The end of the limiting rod 120 away from the adjusting handle 122 extends and retracts within the mounting channel 111 to limit the number of counterweight plates 110, thereby adjusting the weight of the dumbbell 1.

[0050] Specifically, in order to make it easier for the limiting rod 120 to pass through the mounting channel 111 for telescopic movement within it, the cross-sectional area of ​​the end of the limiting rod 120 that mates with the mounting channel 111 can be set to be slightly smaller than the cross-sectional area of ​​the middle part of the limiting rod 120, that is, the end can be chamfered.

[0051] Specifically, the weight of the 110 weight plate is not limited, depending on different training needs.

[0052] Further, please refer to Figure 4 and Figure 5 A step 1201 is provided in the channel 1200. A limiting base 1224 is provided on the first part 1220. The limiting base 1224 is connected to the limiting protrusion 1222. The inner diameter of the limiting base 1224 matches the inner diameter of the step 1201. The inner diameter of the limiting base 1224 is larger than the inner diameter of the adjusting protrusion 1211. The step 1201, which matches the inner diameter of the limiting base 1224, is provided in the channel 1200 to limit the left and right movement of the limiting base 1224, thereby limiting the movement of the limiting protrusion 1222. This ensures that the limiting protrusion 1222 can accurately and vertically enter the adjusting protrusion 1211. At the same time, the fact that the inner diameter of the limiting base 1224 is larger than the inner diameter of the adjusting protrusion 1211 also ensures that the adjusting handle 122 can always move within the channel 1200 and will not disengage.

[0053] Furthermore, a first elastic element 1223 is sleeved on the first part 1220 of the adjusting handle 122. One end of the first elastic element 1223 abuts against the limiting base 1224, and the other end abuts against the step 1201. This allows the adjusting handle 122 to be pressed down axially, and after being released, it can be reset by the restoring force of the first elastic element 1223, and the limiting protrusion 1222 can automatically engage with the adjusting protrusion 1211, making operation convenient.

[0054] Further, please refer to Figure 2 The main body 10 includes a grip bar 100 and a fixing plate 101 disposed at opposite ends of the grip bar 100. One side of the fixing plate 101 is connected to the end of the grip bar 100 and the gear lever 121, and the other side is detachably connected to the counterweight assembly 11. The grip bar 100 provides a grip for the user during exercise, and the fixing plate 101 realizes the connection and support fixation of the counterweight assembly 11 with the grip bar 100 and the adjustment assembly 12.

[0055] Optionally, the grip bar 100 may be engraved with patterns on its surface to increase friction when the user picks up the dumbbell 1, preventing the dumbbell from falling off during exercise and causing injury.

[0056] Optionally, the weight of the fixing plate 101 is not limited, but preferably the weight of the fixing plate 101 is the same as that of the counterweight plate 110.

[0057] Furthermore, a dovetail groove 1102 is formed on one side of the counterweight 110, and a dovetail protrusion 1101 matching the dovetail groove 1102 is provided on the opposite side. The dovetail groove 1102 on the counterweight 110 can engage with the dovetail protrusion 1101 of the adjacent counterweight 110 to achieve fixed engagement of the adjacent counterweight 110. The engagement of the dovetail groove 1102 and the dovetail protrusion 1101 provides unidirectional limiting, that is, the adjacent counterweight 110 can be disengaged from bottom to top, and from top to bottom... When the weight is lowered, it will be fixed; when the limit rod 120 does not enter a certain counterweight plate 110, the dumbbell 1 is lifted, and the outermost counterweight plate 110 will automatically disengage from the counterweight plate 110 that is not matched with the limit rod 120 in the lifting direction; and on the side where the fixing plate 101 and the adjacent counterweight plate 110 are close to each other, one side is provided with a dovetail groove 1102 and the other side is provided with a dovetail protrusion 1101; so as to engage and connect the fixing plate 101 and the counterweight assembly 11, thereby fixing the counterweight plate 110 in the axial direction.

[0058] Understandably, in order to fix the fixing plate 101 to the counterweight plate 110, the side of the fixing plate 101 near the counterweight plate 110 should also be provided with a corresponding dovetail groove 1102 or dovetail protrusion 1101.

[0059] Further, please refer to Figure 2 , Figures 6 to 8 The dumbbell 1 provided in this embodiment of the utility model also includes an adjustable counterweight 13 detachably disposed on the side of the fixing plate 101 away from the counterweight 110. The adjustable counterweight 13 is provided with a pin 130, and the fixing plate 101 is provided with a corresponding insertion hole 1010. The adjustable counterweight 13 is detachably connected to the body 10. The weight of the adjustable counterweight 13 is less than the weight of the counterweight 110, so as to make it easier to adjust the weight of the dumbbell 1, so that the adjustable weight specifications cover a wider range and the adjustment sensitivity is higher.

[0060] For details, please refer to Figure 1 and Figure 2 The grip bar 100 is also provided with a limiting protrusion 1000, which together with the fixing plate 101 restricts the relative displacement of the adjustment counterweight 13.

[0061] Furthermore, the pin 130 is a reset-type indexing pin; the indexing pin is a simple and durable positioning device. When positioning is required, the indexing pin extends and tightly engages with the insertion hole 1010 on the fixed plate 101 to lock the position of the adjusting counterweight 13; when the adjusting counterweight 13 is not in use, the indexing pin can be removed to easily separate the fixed plate 101 from the adjusting counterweight 13; this design is convenient to operate, and the adjusting counterweight 13 is stably connected to the fixed plate 101.

[0062] For specific details, please refer to... Figure 2 , Figures 6 to 8 The pin 130 is a reset type indexing pin, including an operating handle 1302 and a movable rod 1300 fixedly connected to the operating handle 1302. A fixed sleeve 1301 is sleeved on the movable rod 1300, and a connector 1303 is provided at one end of the movable rod 1300. The surface of the fixed sleeve 1301 should also be provided with threads. The pin 130 is fixed in the fixed hole 131 on the adjusting counterweight plate 13 through the fixed sleeve 1301.

[0063] For details, please refer to Figure 7 A second elastic element 1304 is provided between the fixed sleeve 1301 and the movable rod 1300. In the initial state, the connector 1303 on the movable rod 1300 extends into the insertion hole 1010 on the fixed plate 101 under the elastic force of the second elastic element 1304. At this time, the adjusting counterweight 13 is stably connected to the fixed plate 101. When the adjusting counterweight 13 is not needed, the user pulls the operating handle 1302 to pull the connector 1303 out of the insertion hole 1010, thereby separating the adjusting counterweight 13 from the fixed plate 101, which is convenient to operate.

[0064] Optionally, the size of the indexing pin is not limited, as long as it ensures that the adjusting counterweight 13 and the fixing plate 101 can be stably connected.

[0065] Please refer to Figure 9 The second embodiment of this utility model also provides a dumbbell assembly 2, including a base 20, a support frame 21, and a dumbbell 1 as described above; the base 20 and the support frame 21 are detachably connected, the support frame 21 is disposed at both ends of the base 20 and connected to the end of the counterweight assembly 11 away from the adjustment assembly 12; the dumbbell 1 is housed in the base 20, and the support frame 21 fits against both ends of the counterweight assembly 11 to limit, support, and fix the dumbbell 1, which is conducive to the storage and assembly of the dumbbell 1; it has the same beneficial effects as the dumbbell 1 described above.

[0066] Please refer to Figures 9 to 11Furthermore, the base 20 of the dumbbell assembly 2 is provided with a plurality of adjustment holes 200 along the length of the stop bar 121, and the support frame 21 is provided with a mating part 210. The mating part 210 mates with a single adjustment hole 200 to connect and fix the base 20 and the support frame 21. When the counterweight assembly 11 contains different numbers of counterweight plates 110, the position of the mating part 210 and the adjustment hole 200 is adjusted to achieve flexible engagement.

[0067] Specifically, the mating part 210 and the adjusting hole 200 are connected by threads.

[0068] Please refer to Figure 10 Understandably, in order to further secure the unused counterweight 110, the support frame 21 should also be provided with a dovetail protrusion 1101 or a dovetail groove 1102 on the side near the counterweight 110.

[0069] Optionally, other connection and fixing methods can be used between counterweight plates 110, between counterweight plates 110 and fixing plate 101, and between counterweight plates 110 and support frame 21, which are not limited here.

[0070] Compared with the prior art, the dumbbell and dumbbell assembly of this invention have the following advantages:

[0071] 1. The dumbbell provided by this utility model includes a body, two counterweight components respectively disposed at opposite ends of the body, and an adjustment component disposed on the body; the adjustment component includes a limiting rod and a stop rod slidably sleeved on the limiting rod, the stop rod having an adjustment channel along its length and a plurality of adjustment protrusions communicating with the adjustment channel, the limiting rod having an adjustment handle exposed outside the stop rod, the adjustment handle being slidably connected to the adjustment channel; the limiting rod also has a channel, the adjustment handle including a first part and a second part sequentially connected from the limiting rod toward the stop rod, the first part being slidably disposed within the channel, the second part... The weight assembly is equipped with a limiting protrusion, the inner diameter of which matches the inner diameter of the adjusting protrusion. The weight assembly has an installation channel that matches the limiting rod. When adjusting the weight of the weight assembly, the adjusting handle is pressed vertically to disengage the limiting protrusion from the adjusting protrusion. Then, the adjusting handle is slid horizontally along the adjusting channel, causing the limiting rod to pass through the installation channel and extend to different lengths within it. Afterward, the adjusting handle is released, causing the limiting protrusion to engage with the adjusting protrusion, thus fixing the length of the limiting rod. This limits the number of weight plates constituting the weight assembly, allowing for weight adjustment of the dumbbell. The structure is simple and the operation is convenient.

[0072] 2. The dumbbell counterweight assembly provided by this utility model includes several counterweight plates, and mounting holes are opened on the counterweight plates corresponding to the limiting rods. Multiple mounting holes form a mounting channel. The weight of a single counterweight plate is not limited. The end of the limiting rod away from the adjusting handle extends and retracts within the mounting channel to limit the number of counterweight plates, so as to adjust the weight of the dumbbell.

[0073] 3. The dumbbell provided by this utility model has a step inside the channel, and a limiting base is provided on the first part. The limiting base is connected to the limiting protrusion. The inner diameter of the limiting base matches the inner diameter of the step, and the inner diameter of the limiting base is larger than the inner diameter of the adjusting protrusion. The step inside the channel that matches the inner diameter of the limiting base is to limit the left and right movement of the limiting base, thereby limiting the movement of the limiting protrusion, ensuring that the limiting protrusion can accurately and vertically enter the adjusting protrusion. At the same time, the fact that the inner diameter of the limiting base is larger than the inner diameter of the adjusting protrusion ensures that the adjusting handle can always move inside the channel and will not come off.

[0074] 4. The dumbbell provided by this utility model has a first elastic element fitted on the first part, one end of the first elastic element abutting against the limiting base and the other end abutting against the step; so that the adjusting handle can be pressed down axially, and can be reset by the restoring force of the first elastic element after being released.

[0075] 5. The dumbbell body provided by this utility model includes a grip bar and fixed plates disposed at opposite ends of the grip bar. One side of the fixed plate is connected to the end of the grip bar and the shift lever, and the other side is detachably connected to the counterweight assembly. The grip bar provides a gripping part for the user during exercise, and the fixed plates realize the connection and support fixation of the counterweight assembly, the grip bar, and the adjustment assembly.

[0076] 6. The dumbbell provided by this utility model has a dovetail groove on one side of the counterweight plate and a dovetail protrusion matching the dovetail groove on the opposite side. The dovetail groove on the counterweight plate can engage with the dovetail protrusion of the adjacent counterweight plate to achieve fixed engagement of the adjacent counterweight plates. The cooperation between the dovetail groove and the dovetail protrusion provides a unidirectional limit, that is, the adjacent counterweight plates can be disengaged from bottom to top, while they will be fixed from top to bottom. When the limit rod does not enter a certain counterweight plate, the dumbbell is lifted, and the outermost counterweight plate will automatically disengage from the counterweight plate that is not matched with the limit rod in the lifting direction. Moreover, on the side of the fixing plate and the adjacent counterweight plates that are close to each other, one side is provided with a dovetail groove and the other side is provided with a dovetail protrusion. The fixing plate and the counterweight assembly are connected by a snap-fit ​​connection to achieve axial fixation of the counterweight plates.

[0077] 7. The dumbbell provided by this utility model also includes an adjustable counterweight plate that is detachably mounted on the side of the fixed plate away from the counterweight plate. The adjustable counterweight plate is provided with a pin, and the fixed plate is provided with a corresponding insertion hole. The adjustable counterweight plate is detachably connected to the main body. The weight of the adjustable counterweight plate is less than the weight of the counterweight plate, so as to make it easier to adjust the weight of the dumbbell, so that the range of adjustable weight specifications is wider and the adjustment sensitivity is higher.

[0078] 8. The dumbbell pin provided by this utility model is a reset-type indexing pin; the indexing pin is a simple and durable positioning device. When positioning is required, the indexing pin will extend and fit tightly with the insertion hole on the fixed plate to lock the position of the adjusting counterweight; when the adjusting counterweight is not used, the indexing pin can be removed to easily separate the fixed plate from the adjusting counterweight; this design is convenient to operate and the connection between the adjusting counterweight and the fixed plate is stable.

[0079] 9. This utility model also provides a dumbbell assembly, including a base, a support frame, and a dumbbell as described above; the base and the support frame are detachably connected, the support frame is disposed at both ends of the base and connected to the end of the counterweight assembly away from the adjustment assembly; the dumbbell is housed in the base, and the support frame fits against both ends of the counterweight assembly to limit, support, and fix the dumbbell, which is conducive to the storage and assembly of the dumbbell; it has the same beneficial effects as the dumbbell described above, and will not be repeated here.

[0080] 10. The dumbbell assembly provided by this utility model has a base with several adjustment holes along the length of the shift bar, and a support frame with a mating part. The mating part and a single adjustment hole are mated to connect and fix the base and the support frame. When the counterweight assembly contains different numbers of counterweight plates, the position of the mating part and the adjustment hole are adjusted to achieve flexible engagement.

[0081] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dumbbell characterized by: The dumbbell comprises a body, two counterweight assemblies respectively arranged at opposite ends of the body, and an adjusting assembly arranged on the body; the adjusting assembly comprises a limiting rod and a gear rod slidably sleeved on the limiting rod, the gear rod is provided with an adjusting channel and a plurality of adjusting protrusions in communication with the adjusting channel along the length direction of the gear rod, the limiting rod is provided with an adjusting handle exposed to the gear rod, and the adjusting handle is in sliding connection with the adjusting channel; the limiting rod is further provided with a channel, the adjusting handle comprises a first part and a second part connected in sequence from the direction of the limiting rod approaching the gear rod, the first part is slidably arranged in the channel, the second part is provided with a limiting protrusion, and the inner diameter of the limiting protrusion matches the inner diameter of the adjusting protrusion; the counterweight assembly is provided with a mounting channel matched with the limiting rod.

2. The dumbbell of claim 1, wherein: The counterweight assembly comprises a plurality of counterweight pieces, and the counterweight pieces are provided with mounting holes corresponding to the limiting rod, and a plurality of the mounting holes correspondingly form the mounting channel.

3. The dumbbell of claim 1, wherein: The channel is provided with a step, the first part is provided with a limiting base connected with the limiting protrusion, and the inner diameter of the limiting base is greater than the inner diameter of the adjusting protrusion.

4. The dumbbell of claim 3, wherein: The first part is sleeved with a first elastic member, one end of the first elastic member abuts against the limiting base, and the other end abuts against the step.

5. The dumbbell of claim 2, wherein: The body comprises a handle and fixing plates arranged at opposite ends of the handle, one side of the fixing plates is connected with the handle and the end of the gear rod, and the other side is detachably connected with the counterweight assembly.

6. The dumbbell of claim 5, wherein: One side of the counterweight piece is provided with a dovetail groove, and the other side away from the dovetail groove is provided with a dovetail protrusion matched with the dovetail groove; and one side of the fixing plate and the adjacent counterweight piece away from each other is provided with the dovetail groove and the dovetail protrusion.

7. The dumbbell of claim 6, wherein: The dumbbell further comprises an adjusting counterweight piece detachably arranged on the side of the fixing plate away from the counterweight piece, the adjusting counterweight piece is provided with a latch, and the fixing plate is provided with a insertion hole corresponding to the latch.

8. The dumbbell of claim 7, wherein: The latch is a reset type index pin.

9. A dumbbell assembly characterized by: The dumbbell comprises a base, a support frame, and the dumbbell according to any one of claims 1-8; the base and the support frame are detachably connected, the support frame is arranged at both ends of the base and connected with the end of the counterweight assembly away from the adjusting assembly.

10. The dumbbell assembly of claim 9, wherein: The base is provided with a plurality of adjusting holes in the length direction of the gear rod, the support frame is provided with a matching piece, and the matching piece is matched with a single adjusting hole to connect and fix the base and the support frame.

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