Dumbbell assembly

Abstract

The utility model relates to the technical field of fitness equipment, and discloses a dumbbell assembly which is composed of a dumbbell and a base, the dumbbell comprises a dumbbell rod and dumbbell piece sets, the dumbbell rod and the dumbbell piece sets are coaxially placed on the base, a telescopic rod is arranged in the dumbbell rod, and the two ends of the dumbbell rod are respectively provided with one dumbbell piece set. When the dumbbell rod is rotated, the first guide column on the dumbbell rod moves in the guide groove in the telescopic rod, the telescopic rod is driven to move in the axial direction of the dumbbell rod, different numbers of dumbbell pieces in the dumbbell piece set are connected, and weight adjustment of the dumbbell is achieved. Through the design of the telescopic rod in the dumbbell rod and the first guide columns at the two ends, the dumbbell weight can be adjusted by rotating the dumbbell rod, and operation is easy and convenient. The long operation area of the dumbbell rod is convenient for users to operate, the transmission structure is simple and reliable, the cost is reduced, and the stability is improved.

Description

[Technical Field]

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

[0002] Dumbbells are a very common strength training tool in traditional fitness equipment. However, adjusting the weight of traditional dumbbells often requires removing and installing weight plates from the dumbbell bar, a process that is not only cumbersome and time-consuming but also significantly impacts the continuity and efficiency of training. Furthermore, while existing adjustable dumbbells have solved the weight adjustment problem to some extent, their adjustment mechanisms are often complex in design and inconvenient to use. This limits the user experience and training results, and the overly complex adjustment mechanisms also increase the manufacturing cost of the dumbbells and make them prone to malfunction. [Utility Model Content]

[0003] To address the problems of complex structure and inconvenient operation of existing adjustable dumbbells, this utility model provides a dumbbell assembly, which includes a dumbbell bar, dumbbell plates, and a base. The dumbbell bar and dumbbell plates are coaxially placed on the base, and a dumbbell plate assembly is provided at each end of the dumbbell bar.

[0004] The dumbbell bar is hollow and has two telescopic rods inside, each corresponding to a set of dumbbell plates. The dumbbell bar also has a fixed first guide post at both ends. The outer surface of the telescopic rod has a guide groove, and one end of the first guide post passes through the dumbbell bar and is placed in the guide groove.

[0005] The dumbbell plate set includes multiple detachably connected dumbbell plates, each dumbbell plate having a connection hole coaxial with the telescopic rod; when the dumbbell rod is rotated, the first guide post moves in the guide groove and drives the telescopic rod to move along the axial direction of the dumbbell rod to achieve engagement with different numbers of connection holes, so that the dumbbell rod can be connected to different numbers of dumbbell plates through the telescopic rod.

[0006] Preferably, the dumbbell bar is also provided with locking plates at both ends, which are fixedly connected to the dumbbell bar. The locking plates are located on the side of the first guide post away from the dumbbell plate assembly and are spaced apart from the first guide post. A shell is fitted on the locking plate, and a fixing hole is provided on the shell. A pin is provided on the base. When the dumbbell bar is placed on the base, the pin is inserted into the fixing hole.

[0007] Multiple positions are spaced apart on the outer periphery of the locking disc, and the locking disc is provided with a locking groove corresponding to the position of the position; an elastic locking element is provided inside the housing, and the elastic locking element and the fixing hole are located on the same side of the housing; in the natural state, the elastic locking element is engaged in the locking groove; when the dumbbell bar is placed on the base, the elastic locking element abuts against the base, so that the elastic locking element disengages from the locking groove.

[0008] Preferably, the housing is provided with an observation window for observing the gear position, and multiple sets of slots and gear positions are provided correspondingly; elastic beads are provided on the inner wall of the housing, and multiple grooves are provided on the outer periphery of the locking plate corresponding to the gear position. When the observation window is aligned with the gear position, the elastic beads are engaged in the groove corresponding to the gear position.

[0009] Preferably, the dumbbell plate closest to the dumbbell bar in the dumbbell plate assembly is designated as the first dumbbell plate. The first dumbbell plate is fixedly connected to the housing. A second guide post is provided in the connection hole of the first dumbbell plate, and the second guide post is at least partially placed in the guide groove.

[0010] Preferably, when the base is placed horizontally, the dumbbell plates placed on the base in the vertical direction include opposite upper and lower ends;

[0011] The dumbbell plates are equipped with locking devices at the top and bottom. The dumbbell plate furthest from the dumbbell bar is designated as the last dumbbell plate. The top and bottom of the first and last dumbbell plates are each equipped with a locking device. The top and bottom of the remaining dumbbell plates are each equipped with two locking devices facing opposite directions. The locking devices on adjacent dumbbell plates are interlocked, allowing the dumbbell plates to move relative to each other and disengage only in the vertical direction.

[0012] Preferably, the base is provided with a docking part, and the locking part on the lower end of the last dumbbell plate is engaged with the docking part.

[0013] Preferably, the shell is also provided with a counterweight plate, which is snapped onto the shell and is detachably connected to the first dumbbell plate.

[0014] Preferably, the dumbbell bar is further provided with a fixing ring, which is fixedly sleeved on the dumbbell bar, and the first guide post is connected to the fixing ring and passes through the fixing ring and the dumbbell bar in sequence.

[0015] Preferably, a semi-circular boss is provided on one of the adjacent ends of the two telescopic rods, and the two semi-circular bosses are engaged with each other.

[0016] Preferably, the guide groove is a spiral groove arranged along the outer surface of the telescopic rod, and multiple sets of the first guide post and the guide groove are arranged accordingly.

[0017] Compared with the prior art, the dumbbell assembly provided by this utility model has the following advantages:

[0018] 1. The dumbbell assembly provided by this utility model features a hollow dumbbell bar with a telescopic rod inside. The outer surface of the telescopic rod has a guide groove. Both ends of the dumbbell bar are connected by fixed first guide posts. One end of each first guide post passes through the dumbbell bar and is positioned within the guide groove. Rotating the dumbbell bar causes the telescopic rod to move relative to the dumbbell bar via the first guide post, allowing the dumbbell bar to connect different numbers of dumbbell plates. This dumbbell assembly allows for adjustment of the dumbbell weight simply by rotating the dumbbell bar. The adjustment process is convenient and simple, and the operating area of ​​the dumbbell bar is more user-friendly. Furthermore, by fixing the first guide posts at both ends of the dumbbell bar, the synchronous rotation of the first guide posts and the dumbbell bar drives the telescopic rod. The transmission structure of the dumbbell assembly is simple and highly reliable, reducing manufacturing costs and increasing the service life of the dumbbell assembly.

[0019] 2. The dumbbell bar of this utility model has locking discs integrated with the bar at both ends. A housing is fitted onto the locking disc, and the housing has fixing holes. A pin is provided on the base. When the dumbbell bar is placed on the base, the pin is inserted into the fixing holes. This allows the dumbbell assembly to be stably placed on the base when not in use, preventing it from rolling or tipping over, thus improving the storage safety of the dumbbell assembly.

[0020] The locking disc has adjustable positions on its outer circumference, with corresponding slots. Inside the housing, there is a spring-loaded locking element on the same side as the fixing hole. In its natural state, the spring-loaded locking element is engaged in the slot, preventing relative rotation between the housing and the locking disc when the dumbbell is lifted from the base. When the dumbbell bar is on the base, the spring-loaded locking element abuts against the base, separating it from the slot. This allows the dumbbell bar and locking disc to rotate relative to the housing, enabling weight adjustment. Simultaneously, during dumbbell bar rotation, the locking disc and housing remain relatively separate, preventing the housing from rolling off the base.

[0021] 3. The casing of this utility model is equipped with an observation window for viewing the gear positions. Multiple sets of corresponding slots and gear positions are also provided. Rotating the dumbbell bar to different angles allows the telescopic rod to extend different distances to connect dumbbell plates of different weights. Simultaneously, the corresponding gear position on the locking plate moves to the observation window, allowing the user to directly see the weight connected to the dumbbell bar, facilitating more accurate rotation adjustment. The inner wall of the casing is also equipped with elastic beads, and the outer circumference of the locking plate has multiple grooves corresponding to the gear positions. When the observation window is aligned with the gear position, the elastic beads engage in the corresponding groove, improving the user's feel during dumbbell bar rotation and further ensuring the stability of the dumbbell during use, preventing weight changes due to inaccurate gear engagement.

[0022] 4. In this invention, the dumbbell plate closest to the dumbbell bar is designated as the first dumbbell plate. When the housing is placed on the base, it is fixed to the base through a fixing hole, and the first dumbbell plate is fixedly connected to the housing. This prevents the dumbbell plate assembly from rotating synchronously with the dumbbell bar during weight adjustment, making it easier for the user to rotate the dumbbell bar and preventing wear on the contact surface between the dumbbell plate assembly and the base. Simultaneously, when the dumbbell bar is lifted, the first dumbbell plate connects to the remaining dumbbell plates in the assembly, preventing the assembly from slipping off the dumbbell bar and improving the safety of the dumbbell assembly. Furthermore, when the first guide post moves the telescopic rod through the guide groove, the second guide post, positioned within the guide groove and relatively fixed to the base by the housing, restricts the telescopic rod's rotation through the guide groove. This allows the rotation of the dumbbell bar to stably and efficiently move the telescopic rod axially.

[0023] 5. When the base of this utility model is placed horizontally, the dumbbell plates placed on the base in the vertical direction include opposing upper and lower ends. Locking components are provided on the upper and lower ends, ensuring the dumbbell plates are securely connected. The staggered interlocking of the locking components on adjacent dumbbell plates prevents the plates from shaking or falling off during use, improving the safety and stability of the dumbbell assembly. Simultaneously, the locking components ensure that the connecting holes of each dumbbell plate are located on the same axis, allowing the telescopic rod to pass smoothly and stably through the connecting holes within the dumbbell plate assembly. Furthermore, the locking components allow for vertical freedom between the dumbbell plates, enabling the user to easily remove the dumbbell plates connected to the telescopic rod from the dumbbell plate assembly when lifting the dumbbell rod, avoiding the need to individually disassemble the dumbbell plates.

[0024] 6. The base of this utility model is provided with a docking part, and the locking member on the lower end of the last dumbbell plate can be locked onto the docking part. When the dumbbell assembly is not in use, the last dumbbell plate is locked onto the docking part by the locking member, further ensuring the stability of the dumbbell assembly placed on the base and preventing the dumbbell assembly from moving or tipping over at will. At the same time, it can also position and fix the unused dumbbell plates on the base, making it convenient for users to quickly and easily reset the dumbbell assembly after use.

[0025] 7. The casing of this utility model is also equipped with a counterweight plate, which is snapped onto the casing and is detachably connected to the first dumbbell plate. To facilitate connection with the telescopic rod, each dumbbell plate is of the same specification, which limits the range of dumbbell weight adjustment. By setting a counterweight plate that is different from the dumbbell plates, and ensuring that the counterweight plate and dumbbell plates are not connected to the dumbbell plate assembly, the weight of the dumbbell can be adjusted more conveniently and flexibly. This allows for a wider range of adjustable weight specifications and higher weight accuracy, facilitating users' different weight needs at different stages.

[0026] 8. The dumbbell bar of this invention is also equipped with a fixing ring, which is fixedly sleeved on the dumbbell bar. The fixing ring secures the first guide post to the dumbbell bar, allowing for easy adjustment of the first guide post's position while ensuring its stability and reliability. The fixing ring design not only enhances the structural strength of the dumbbell bar but also makes the connection between the first guide post and the dumbbell bar more secure, avoiding safety hazards caused by the first guide post loosening or falling off during use. Furthermore, the fixing ring provides good support for the first guide post, making the dumbbell rotate more smoothly and improving the user experience.

[0027] 9. The two telescopic rods of this utility model are provided with semi-circular bosses at their adjacent ends. The two semi-circular bosses are engaged with each other, which restricts the rotation of the two telescopic rods and enhances the connection stability between the telescopic rods. This allows the telescopic rods to move stably along the axial direction within the dumbbell rod, improving the stability when controlling the movement of the telescopic rods by rotating the dumbbell rod.

[0028] 10. The guide groove of this utility model is a spiral groove arranged along the outer surface of the telescopic rod. Multiple sets of first guide posts and guide grooves are correspondingly arranged. By moving the first guide post within the spiral groove, not only can the telescopic rod move axially along the dumbbell bar, but the guiding effect of the spiral groove also makes the telescopic rod move more smoothly during movement, avoiding inaccurate weight adjustment caused by moving too fast or too slow. At the same time, the spiral groove design also increases the contact area between the telescopic rod and the first guide post, improving the stability and reliability of the telescopic rod during movement. In addition, the corresponding arrangement of multiple sets of guide grooves and first guide posts further enhances the structural strength of the dumbbell assembly and the accuracy of weight adjustment. [Attached Image Description]

[0029] 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.

[0030] Figure 1 This is an isometric view of the dumbbell assembly provided in the first embodiment of this utility model.

[0031] Figure 2 The dumbbell assembly provided in the first embodiment of this utility model exploded. Figure 1 .

[0032] Figure 3 This is a cross-sectional view of the dumbbell assembly provided in the first embodiment of this utility model.

[0033] Figure 4 The dumbbell assembly provided in the first embodiment of this utility model exploded. Figure 2 .

[0034] Figure 5 This is a left view of the dumbbell bar provided in the first embodiment of this utility model.

[0035] Figure 6 This is a cross-sectional view of a dumbbell in its natural state, provided in the first embodiment of this utility model.

[0036] Figure 7 This is a partial enlarged view of the dumbbell assembly provided in the first embodiment of this utility model.

[0037] Figure 8 This is an isometric view of the casing provided in the first embodiment of this utility model.

[0038] Figure 9 This is a schematic diagram of the dumbbell plate structure provided in the first embodiment of this utility model. Figure 1 .

[0039] Figure 10 This is a schematic diagram of the dumbbell plate structure provided in the first embodiment of this utility model. Figure 2 .

[0040] Figure 11 The dumbbell assembly provided in the first embodiment of this utility model exploded. Figure 3 .

[0041] Explanation of reference numerals in the attached diagram:

[0042] 1. Dumbbell assembly;

[0043] 11. Dumbbell; 12. Base; 13. Telescopic bar; 14. Counterweight plate; 15. Locking device;

[0044] 111. Dumbbell bar; 112. Dumbbell plate assembly; 113. Locking disc; 114. Shell; 115. Retaining ring; 116. First guide post; 117. Dumbbell plate; 121. Pin; 122. Connecting part; 131. Guide groove; 132. Semi-circular boss; 151. Protruding plate; 152. Concave plate; 153. Gap;

[0045] 1121. First dumbbell plate; 1122. Last dumbbell plate; 1123. Connecting hole; 1124. Middle dumbbell plate; 1125. Recess; 1131. Slot; 1132. Grip; 1133. Elastic bead; 1141. Fixing hole; 1142. Elastic locking element; 1143. Observation window; 1144. Receiving cavity; 1171. Upper end; 1172. Lower end;

[0046] 11211, Second guide post; 11421, Spring; 11422, T-shaped part; 11423, Protrusion.

Detailed Implementation Methods

[0047] 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.

[0048] It should be noted that the terms "first" and "second" in the specification and claims of this utility model are used to distinguish different objects, rather than to describe a specific order.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] Traditional dumbbells often require removing and installing weight plates on the dumbbell bar to adjust the weight, a cumbersome and time-consuming process that significantly impacts the continuity and efficiency of training. While existing adjustable dumbbells have solved the weight adjustment problem to some extent, their adjustment mechanisms are often complex and inconvenient to use, limiting the user experience and training results. Furthermore, overly complex adjustment mechanisms increase manufacturing costs and make the dumbbells prone to malfunction.

[0054] To address the issues of complex structure and inconvenient operation of existing adjustable dumbbells, please refer to the following: Figures 1-4 The first embodiment of this utility model provides a dumbbell assembly 1, which includes a dumbbell 11 and a base 12, with the dumbbell 11 placed on the base 12. The dumbbell 11 includes a dumbbell bar 111 and a dumbbell plate assembly 112, which are coaxially placed on the base 12, and a dumbbell plate assembly 112 is provided at each end of the dumbbell bar 111.

[0055] The dumbbell bar 111 is hollow, and two telescopic rods 13 corresponding to the dumbbell plate group 112 are set inside the dumbbell bar 111. The two ends of the dumbbell bar 111 are also provided with fixed first guide posts 116. The outer surface of the telescopic rod 13 is provided with guide grooves 131. One end of the first guide post 116 passes through the dumbbell bar 111 and is placed in the guide groove 131.

[0056] The dumbbell plate assembly 112 includes multiple detachably connected dumbbell plates 117. Each dumbbell plate 117 has a connecting hole 1123 coaxial with the telescopic rod 13. When the dumbbell rod 111 is rotated, the first guide post 116 moves in the guide groove 131 and drives the telescopic rod 13 to move along the axial direction of the dumbbell rod 111 to cooperate with different numbers of connecting holes 1123, so that the dumbbell rod 111 is connected to different numbers of dumbbell plates 117 through the telescopic rod 13.

[0057] In the dumbbell assembly 1 provided in this embodiment, a telescopic rod 13 is provided inside the dumbbell bar 111. By setting a fixed first guide post 116 at both ends of the dumbbell bar 111, and placing one end of the first guide post 116 through the dumbbell bar 111 and into the guide groove 131 on the telescopic rod 13, rotating the dumbbell bar 111 can drive the telescopic rod 13 to move along the axial direction of the dumbbell bar 111 through the first guide post 116. At the same time, since dumbbell plate groups 112 are placed at both ends of the dumbbell bar 111, when the telescopic rod 13 moves into the connection hole 1123 of the dumbbell plate group 112, different numbers of dumbbell plates 117 can be connected. The telescopic rod 13 connects the dumbbell plates 117 and the dumbbell bar 111 to form dumbbells 11 of different weights. Thus, the dumbbell assembly 1 can adjust the weight of the dumbbell 11 by rotating the dumbbell bar 111. The adjustment operation is convenient and simple, and the longer operating area of ​​the dumbbell bar 111 is also more convenient for users to operate. In addition, the dumbbell bar 111 is fixedly connected to the first guide post 116 at both ends. The first guide post 116 and the dumbbell bar 111 rotate synchronously, which can drive the telescopic bar 13. This makes the transmission structure of the dumbbell assembly 1 simple and highly reliable, reduces the manufacturing cost of the dumbbell assembly 1, and improves the stability of the dumbbell assembly 1.

[0058] Specifically, please refer to the following: Figure 4 and Figure 5 The dumbbell bar 111 is also equipped with a retaining ring 115, which is fixedly sleeved on the dumbbell bar 111. A first guide post 116 is connected to the retaining ring 115 and passes through both the retaining ring 115 and the dumbbell bar 111. The retaining ring 115 fixes the first guide post 116 to the dumbbell bar 111, allowing for easy adjustment of its position while ensuring its stability and reliability. The design of the retaining ring 115 not only enhances the structural strength of the dumbbell bar 111 but also makes the connection between the first guide post 116 and the dumbbell bar 111 more secure, avoiding safety hazards caused by the first guide post 116 loosening or falling off during use. Furthermore, the retaining ring 115 provides good support for the first guide post 116, making the dumbbell 111 more stable during rotation and improving the user experience.

[0059] Specifically, please refer to the following: Figures 2-4 The dumbbell bar 111 is also provided with locking plates 113 at both ends, which are fixedly connected to the dumbbell bar 111. The locking plates 113 are located on the side of the first guide post 116 away from the dumbbell plate group 112 and are spaced apart from the first guide post 116. A shell 114 is fitted on the locking plate 113, and a fixing hole 1141 is provided on the shell 114. A pin 121 is provided on the base 12. When the dumbbell bar 111 is placed on the base 12, the pin 121 is inserted into the fixing hole 1141.

[0060] The outer periphery of the locking disc 113 is provided with multiple stops 1132 spaced apart, and the locking disc 113 is provided with a groove 1131 corresponding to the position of the stop 1132. An elastic locking member 1142 is provided inside the housing 114, and the elastic locking member 1142 and the fixing hole 1141 are located on the same side of the housing 114. In its natural state, the elastic locking member 1142 is engaged in the groove 1131. When the dumbbell bar 111 is placed on the base 12, the elastic locking member 1142 abuts against the base 12, causing the elastic locking member 1142 to disengage from the groove 1131. Optionally, the dumbbell bar 111 and the locking disc 113 are integrally formed or connected by welding, so that the locking disc 113 is fixedly connected to the dumbbell bar 111, and the dumbbell bar 111 and the locking disc 113 can rotate synchronously.

[0061] When the dumbbell 11 is placed on the base 12, the housing 114 on the dumbbell bar 111 contacts the base 12, and at the same time, the pin 121 on the base 12 is inserted into the fixing hole 1141 on the housing 114, fixing the housing 114 on the base 12. This allows the dumbbell bar 111 to drive the locking plate 113 to rotate relative to the housing 114 within the housing 114. This also allows the dumbbell 11 to be stably placed on the base 12 when not in use, preventing it from rolling or tipping over, thus improving the storage safety of the dumbbell assembly 1.

[0062] When the user lifts the dumbbell 11 from the base 12 for use, please refer to... Figure 6 In its natural state, the elastic locking element 1142 engages within the slot 1131, preventing relative rotation between the shell 114 and the locking plate 113 when the dumbbell 11 is lifted from the base 12. After the dumbbell 11 is placed on the base 12, the elastic locking element 1142 separates from the slot 1131, allowing the dumbbell bar 111 and the locking plate 113 to rotate relative to the shell 114, thus enabling weight adjustment of the dumbbell 11. Simultaneously, during the rotation of the dumbbell bar 111, the locking plate 113 and the shell 114 remain relatively separate, preventing the dumbbell 11, which is placed on the base 12 via the shell 114, from rolling off the base 12.

[0063] Furthermore, please refer to the following: Figures 6-8 The elastic locking member 1142 includes a spring 11421 and a T-shaped member 11422. A receiving cavity 1144 is provided inside the housing 114, and the locking disc 113 is placed inside the receiving cavity 1144. A slide rail communicating with the receiving cavity 1144 is provided inside the housing of the housing 114. The spring 11421 and the T-shaped member 11422 are placed within the slide rail, and the two ends of the spring 11421 are respectively connected to the housing 114 and the T-shaped member 11422. The T-shaped member 11422 can slide within the slide rail by compressing the spring 11421. The T-shaped member 11422 includes a protrusion 11423 placed within the receiving cavity 1144. When the spring 11421 is in its natural state, please refer to [reference needed]. Figure 6The protrusion 11423 of the T-shaped member 11422 can be engaged in the slot 1131 to secure the housing 114 and the locking plate 113. When the dumbbell 11 is placed on the base 12 and the elastic locking member 1142 abuts against the base 12, please refer to... Figure 3 The T-shaped part 11422 compresses the spring 11421, and the protrusion 11423 of the T-shaped part 11422 moves out of the slot 1131 and disengages from the locking disc 113.

[0064] Furthermore, please refer to the following: Figure 4 and Figure 7 The housing 114 is provided with an observation window 1143 for observing the position 1132, and multiple sets of slots 1131 and positions 1132 are provided accordingly; elastic beads 1133 are provided on the inner wall of the housing 114, and multiple grooves are provided on the outer periphery of the locking plate 113 corresponding to the position 1132. When the observation window 1143 is aligned with the position 1132, the elastic beads 1133 are engaged in the grooves corresponding to the position 1132.

[0065] By rotating the dumbbell bar 111 to different angles, the internal telescopic rod 13 can extend to different lengths relative to the dumbbell bar 111, thereby connecting different numbers of dumbbell plates 117. When the dumbbell bar 111 is rotated to a specific angle, the corresponding position 1132 on the locking plate 113 moves to the observation window 1143. Position 1132 indicates the weight of the dumbbell plates 117 connected to the telescopic rod 13 at this time, allowing the user to intuitively see the weight connected to the dumbbell bar 111, facilitating more accurate rotation adjustment. At the same time, the elastic beads 1133 provided on the inner wall of the housing 114 engage in the corresponding groove of position 1132 when the observation window 1143 is aligned with position 1132, increasing the user's feel during the rotation of the dumbbell bar 111, and further ensuring the stability of the dumbbell 111 during use, preventing weight changes caused by inaccurate engagement of position 1132.

[0066] Specifically, please refer to the following: Figure 3 , Figure 4 and Figure 11 The dumbbell plate 117 near the dumbbell bar 111 of the dumbbell plate assembly 112 is designated as the first dumbbell plate 1121. The first dumbbell plate 1121 is fixedly connected to the housing 114. A second guide post 11211 is provided in the connection hole 1123 of the first dumbbell plate 1121. The second guide post 11211 is at least partially placed in the guide groove 131.

[0067] When the housing 114 is fixed to the base 12 through the fixing hole 1141, the first dumbbell plate 1121 is fixedly connected to the housing 114, preventing the dumbbell plate assembly 112 from rotating synchronously with the dumbbell bar 111 during weight adjustment. This makes it easier for the user to rotate the dumbbell bar 111 and also prevents wear on the contact surface between the dumbbell plate assembly 112 and the base 12. Simultaneously, when the dumbbell bar 111 is lifted, the first dumbbell plate 1121 connects to the remaining dumbbell plates 117 in the dumbbell plate assembly 112, preventing the dumbbell plate assembly 112 from slipping off the dumbbell bar 111 and improving the safety of the dumbbell assembly 1. Furthermore, when the first guide post 116 drives the telescopic rod 13 to move through the guide groove 131, since the second guide post 11211 is placed in the guide groove 131, and the second guide post 11211 together with the first dumbbell plate 1121 is relatively fixed on the base 12 by the shell sleeve 114, the second guide post 11211 can restrict the rotation of the telescopic rod 13 through the guide groove 131, thus preventing the telescopic rod 13 from rotating synchronously with the dumbbell rod 111, thereby enabling the rotating dumbbell rod 111 to stably and efficiently drive the telescopic rod 13 to move axially.

[0068] Specifically, please refer to the following: Figure 2 and Figure 4 When the base 12 is placed horizontally, the dumbbell plate 117 placed on the base 12 in the vertical direction includes an upper end 1171 and a lower end 1172.

[0069] The upper end 1171 and the lower end 1172 are provided with locking members 15. The dumbbell plate 117 of the dumbbell plate group 112 away from the dumbbell bar 111 is designated as the last dumbbell plate 1122. The upper end 1171 and the lower end 1172 of the first dumbbell plate 1121 and the last dumbbell plate 1122 are respectively provided with a locking member 15. The upper end 1171 and the lower end 1172 of the remaining dumbbell plates 117 are respectively provided with two locking members 15 facing opposite directions. The locking members 15 on adjacent dumbbell plates 117 are interlocked, so that the dumbbell plates 117 can only move relative to each other in the vertical direction and disengage.

[0070] The locking element 15 securely connects the dumbbell plates 117 together. The staggered engagement of the locking elements 15 on adjacent dumbbell plates 117 prevents them from wobbling or falling off during use, improving the safety and stability of the dumbbell assembly 1. Simultaneously, the locking element 15 ensures that the connecting holes 1123 of each dumbbell plate 117 are on the same axis, allowing the telescopic rod 13 to smoothly and stably pass through the connecting holes 1123 within the dumbbell plate assembly 112. Furthermore, the locking element 15 allows for vertical freedom between the dumbbell plates 117, enabling the user to easily remove the dumbbell plates 117 connected to the telescopic rod 13 from the dumbbell plate assembly 112 when lifting the dumbbell bar 111, avoiding the need to individually disassemble the dumbbell plates 117.

[0071] Furthermore, please refer to the following: Figure 9 and Figure 10 The upper end 1171 and lower end 1172 of the dumbbell plate 117 are symmetrically provided with recesses 1125, and locking members 15 are detachably connected to the recesses 1125. The locking member 15 includes a convex plate 151 and a concave plate 152 provided on the same plane. When the locking member 15 is connected in the recess 1125, there is a gap 153 between the convex plate 151 and the concave plate 152 of different locking members 15 in the same recess 1125. On the middle dumbbell plate 1124 located between the first dumbbell plate 1121 and the last dumbbell plate 1122 in the dumbbell plate group 112, two locking members 15 are provided in the recess 1125 at the same time, and the two locking members 15 are arranged in opposite directions, with the convex plate 151 of one locking member 15 facing upward and the concave plate 152 of the other locking member 15 facing upward. When the convex plate 151 of the locking member 15 faces upward, both the convex plate 151 and the concave plate 152 of the locking member 15 are placed within the recess 1125. When the concave plate 152 of the locking member 15 faces upward, the convex plate 151 and the concave plate 152 of the locking member 15 extend out of the recess 1125. The locking members 15 on adjacent dumbbell plates 117 are arranged in opposite directions. The locking members 15 are inserted into the gap 153 between the locking members 15 and the dumbbell plates 117 within the recess 1125 of the adjacent dumbbell plates 117. The convex plates 151 and the concave plates 152 of the two locking members 15 are staggered and fitted together. The dumbbell plates 117 are locked in all directions except the vertical direction by the cooperation of the locking members 15 with different arrangement directions.

[0072] Specifically, please refer to Figure 2 The base 12 is provided with a docking part 122, and the locking part 15 on the lower end 1172 of the last dumbbell plate 1122 is engaged with the docking part 122.

[0073] When dumbbell assembly 1 is not in use, the last dumbbell plate 1122 is engaged with the docking part 122 by the locking member 15, further ensuring the stability of dumbbell assembly 1 placed on the base 12 and preventing dumbbell assembly 1 from moving or tipping over at will. At the same time, unused dumbbell plates 117 on the base 12 can also be positioned and fixed, making it convenient for users to quickly and easily reset dumbbell assembly 1 after use.

[0074] Specifically, please refer to the following: Figures 2-4The housing 114 is also equipped with a counterweight plate 14, which is snapped onto the housing 114 and is detachably connected to the first dumbbell plate 1121. To facilitate connection with the telescopic rod 13, each dumbbell plate 117 has the same specifications, which limits the range of dumbbell weight adjustment. By setting a counterweight plate 14, which is different from the dumbbell plates 117, and which is not connected to the dumbbell plate assembly 112, the weight of the dumbbell 11 can be adjusted more conveniently and flexibly. This allows for a wider range of adjustable weights and higher weight accuracy, facilitating users' different weight needs at different stages.

[0075] Specifically, please refer to the following: Figure 3 and Figure 4 The two telescopic rods 13 each have a semi-circular boss 132 at one of their adjacent ends, and the two semi-circular bosses 132 engage with each other. This restricts the rotation of the two telescopic rods 13, enhances the connection stability between the telescopic rods 13, and allows the telescopic rods 13 to move stably along the axial direction within the dumbbell rod 111, thus improving the stability when controlling the movement of the telescopic rods 13 by rotating the dumbbell rod 111.

[0076] Further, please refer to Figure 4 The guide groove 131 is a spiral groove arranged along the outer surface of the telescopic rod 13, and multiple sets of the first guide post 116, the second guide post 11211, and the guide groove 131 are correspondingly arranged. The first guide post 116, by moving within the spiral groove, not only enables the telescopic rod 13 to move axially along the dumbbell rod 111, but also, through the guiding effect of the spiral groove, makes the telescopic rod 13 move more smoothly during movement, avoiding inaccurate weight adjustment due to excessively fast or slow movement. Simultaneously, the spiral groove design increases the contact area between the telescopic rod 13 and the first guide post 116 and the second guide post 11211, improving the stability and reliability of the telescopic rod 13 during movement. Furthermore, the multiple sets of guide grooves 131 corresponding to the first guide post 116 and the second guide post 11211 further enhance the structural strength of the dumbbell assembly 1 and the accuracy of weight adjustment.

[0077] The dumbbell assembly 1 provided in this embodiment consists of a dumbbell 11 and a base 12. The dumbbell 11 includes a dumbbell bar 111 and dumbbell plate groups 112, which are coaxially placed on the base 12. A telescopic rod 13 is provided inside the dumbbell bar 111, and there is a dumbbell plate group 112 at each end of the dumbbell bar 111. When the dumbbell bar 111 is rotated, the first guide post 116 on the dumbbell bar 111 moves within the guide groove 131 on the telescopic rod 13, causing the telescopic rod 13 to move axially along the dumbbell bar 111, connecting different numbers of dumbbell plates 117 in the dumbbell plate groups 112, thereby realizing the adjustment of dumbbell weight. This dumbbell assembly 1, through the design of the telescopic rod 13 inside the dumbbell bar 111 and the first guide posts 116 at both ends, can realize the adjustment of dumbbell weight by rotating the dumbbell bar 111, which is simple and convenient to operate. The long operating area of ​​the dumbbell bar 111 also facilitates user operation, and the transmission structure is simple and reliable, reducing costs and improving stability.

[0078] 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 assembly, characterized in that: The device includes a dumbbell bar, dumbbell plates, and a base. The dumbbell bar and the dumbbell plates are coaxially placed on the base, and each end of the dumbbell bar is provided with a dumbbell plate. The dumbbell bar is hollow, and two telescopic rods corresponding to the dumbbell plate group are respectively provided inside the dumbbell bar; both ends of the dumbbell bar are also provided with fixed first guide posts, and the outer surface of the telescopic rod is provided with guide grooves, and one end of the first guide post passes through the dumbbell bar and is placed in the guide groove; The dumbbell plate assembly includes multiple detachably connected dumbbell plates, each dumbbell plate having a connection hole coaxial with the telescopic rod; when the dumbbell rod is rotated, the first guide post moves within the guide groove and drives the telescopic rod to move along the axial direction of the dumbbell rod to engage with different numbers of the connection holes, so that the dumbbell rod is connected to different numbers of dumbbell plates through the telescopic rod.

2. The dumbbell assembly according to claim 1, characterized in that: The dumbbell bar is also provided with locking plates at both ends, which are fixedly connected to the dumbbell bar. The locking plates are located on the side of the first guide post away from the dumbbell plate group and are spaced apart from the first guide post. A shell is fitted on the locking plate, and a fixing hole is provided on the shell. A pin is provided on the base. When the dumbbell bar is placed on the base, the pin is inserted into the fixing hole. The outer periphery of the locking disc is provided with multiple positions at intervals, and the locking disc is provided with a slot corresponding to the position of the position; an elastic locking member is provided inside the shell, and the elastic locking member and the fixing hole are located on the same side of the shell; in the natural state, the elastic locking member is engaged in the slot; when the dumbbell bar is placed on the base, the elastic locking member abuts against the base, so that the elastic locking member disengages from the slot.

3. A dumbbell assembly according to claim 2, characterized in that: The housing is provided with an observation window for observing the gear position, and multiple sets of slots and gear positions are provided correspondingly; elastic beads are provided on the inner wall of the housing, and multiple grooves are provided on the outer periphery of the locking disc corresponding to the position of the gear position. When the observation window is aligned with the gear position, the elastic beads are engaged in the groove corresponding to the gear position.

4. A dumbbell assembly according to claim 2, characterized in that: The dumbbell plate closest to the dumbbell bar in the dumbbell plate group is designated as the first dumbbell plate. The first dumbbell plate is fixedly connected to the housing. A second guide post is provided in the connection hole of the first dumbbell plate, and the second guide post is at least partially placed in the guide groove.

5. A dumbbell assembly according to claim 4, characterized in that: When the base is placed horizontally, the dumbbell plates placed on the base in the vertical direction include opposite upper and lower ends. The upper and lower ends are provided with locking members. The dumbbell plate that is furthest from the dumbbell bar in the dumbbell plate group is designated as the last dumbbell plate. The upper and lower ends of the first and last dumbbell plates are each provided with a locking member. The upper and lower ends of the remaining dumbbell plates are each provided with two locking members facing opposite directions. The locking members on adjacent dumbbell plates are interlocked, so that the dumbbell plates can only move relative to each other in the vertical direction and disengage.

6. A dumbbell assembly according to claim 5, characterized in that: The base is provided with a docking part, and the locking member on the lower end of the last dumbbell plate is engaged with the docking part.

7. A dumbbell assembly according to claim 4, characterized in that: The shell is also provided with a counterweight plate, which is snapped onto the shell and is detachably connected to the first dumbbell plate.

8. A dumbbell assembly according to claim 1, characterized in that: The dumbbell bar is also provided with a fixing ring, which is fixedly sleeved on the dumbbell bar, and the first guide post is connected to the fixing ring and passes through the fixing ring and the dumbbell bar in sequence.

9. A dumbbell assembly according to claim 1, characterized in that: The two telescopic rods have a semi-circular boss on one of their adjacent ends, and the two semi-circular bosses are engaged with each other.

10. A dumbbell assembly according to claim 1, characterized in that: The guide groove is a spiral groove arranged along the outer surface of the telescopic rod, and multiple sets of the first guide post and the guide groove are arranged accordingly.

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