A type of dumbbell with insert plates

Abstract

This utility model discloses a plate dumbbell, relating to the field of fitness equipment technology. The plate dumbbell consists of a connector, dumbbell plates, and a dumbbell bar. The screw of the connector passes through the dumbbell plates and is inserted into the dumbbell bar. Locking devices are provided on the connecting terminals at both ends of the dumbbell bar. One end of the locking device engages with the screw of the connector to fix the screw, so that the end of the connector and the connecting terminal clamp the dumbbell plates to form the plate dumbbell. When the screw is disengaged from the dumbbell bar, the screw can slide relative to the dumbbell bar, which facilitates quick adjustment of the position of the connector and completes the assembly and disassembly of the dumbbell plates, realizing the rapid assembly of the plate dumbbell. By moving the locking device, the fixing and loosening of the connector can be controlled, thereby completing the assembly and disassembly of the dumbbell plates and adjusting the weight of the plate dumbbell. The locking device in this plate dumbbell has a simple structure and is easy to operate.

Description

[Technical Field]

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

[0002] In traditional dumbbell designs, weight plates are typically attached to the dumbbell bar via screws. Users can adjust the weight by adding or removing the screws to increase or decrease the number of weight plates. To ensure the weight plates don't loosen due to vibration or other reasons during use, designers incorporate a locking mechanism on the dumbbell bar to secure the screws. However, existing locking mechanisms are often quite complex, increasing both manufacturing costs and assembly difficulty. [Utility Model Content]

[0003] To address the issue of complex structures in existing adjustable dumbbells, this invention provides a plate dumbbell. The plate dumbbell includes a connector, dumbbell plates, and a hollow dumbbell bar. Connecting terminals are located at both ends of the dumbbell bar. The connector includes a connected end and a screw. The screw passes through the dumbbell plates and is partially inserted into the dumbbell bar. The end and connecting terminals hold the dumbbell plates. External threads are provided on the screw. A locking member is provided on the connecting terminal, movably connected to the connecting terminal in the direction towards the dumbbell bar. One end of the locking member passes through the connecting terminal and extends into the dumbbell bar, with the end of the locking member positioned within the thread clearance of the external threads to achieve a threaded engagement between the locking member and the connector.

[0004] Preferably, the connecting terminal is provided with a threaded hole, and the locking member is disposed in the threaded hole and threadedly connected to the connecting terminal.

[0005] Preferably, the locking element includes a rotating rod and a threaded sleeve, with the threaded sleeve fitted onto the rotating rod. The rotating rod includes a rotating end and a snap-fit ​​end, with the rotating end exposed relative to the connecting terminal and partially snapped onto the threaded sleeve. By rotating the rotating end, the locking element can be moved closer to or away from the dumbbell rod within the threaded hole.

[0006] Preferably, a spring is fitted between the rotating end and the snap-fit ​​end of the rotating rod. The threaded sleeve has a first through hole and a second through hole. The rotating rod passes through the first through hole and the second through hole. The threaded sleeve is fitted onto the spring and the rotating rod in sequence. The two ends of the spring abut against the snap-fit ​​end and the threaded sleeve, respectively. The first through hole is close to the rotating end, and the second through hole is close to the snap-fit ​​end. The diameter of the first through hole is smaller than the diameter of the spring, and the spring abuts against the inner wall of the end of the threaded sleeve where the first through hole is located. The diameter of the second through hole is larger than the diameter of the snap-fit ​​end.

[0007] Preferably, the rotating end of the rotating rod is provided with a locking piece, and the end of the threaded sleeve with the first through hole is provided with a locking groove, and the locking piece is placed in the locking groove; when the locking piece is placed in the locking groove, under the action of the spring, the locking end of the rotating rod is located in the thread gap on the screw.

[0008] Preferably, the dumbbell plates are provided in multiple pieces, including a fixed plate and a replaceable plate. The fixed plate contacts and is fixedly connected to the connecting terminal, and the replaceable plate is detachably connected to the screw. The replaceable plate has a U-shaped groove with an opening on one side, through which the screw passes.

[0009] Preferably, the dumbbell plates are provided with a mating part, which includes a groove and a protrusion. The groove and the protrusion are located on opposite sides of the dumbbell plates, and the grooves and protrusions of adjacent dumbbell plates are mated and engaged.

[0010] Preferably, when the dumbbell plate is placed horizontally, the dumbbell plate is defined by having an upper and lower end opposite each other in the vertical direction, the opening of the U-shaped groove faces the lower end, and the dumbbell plate is provided with a hollowed-out groove near the upper end.

[0011] Preferably, the dumbbell plate also includes a counterweight plate, which is snapped onto the connecting terminal and detachably connected to the fixing plate.

[0012] Preferably, the thickness of the replacement piece is set to an integer multiple of the thread clearance.

[0013] Compared with the prior art, the plate dumbbell provided by this utility model has the following advantages:

[0014] 1. The dumbbell with insert plates provided by this utility model includes a connector, dumbbell plates, and a hollow dumbbell bar. The screw of the connector passes through the dumbbell plates and is partially inserted into the dumbbell bar, thereby connecting the dumbbell plates to the dumbbell bar to form a dumbbell. The overall weight of the dumbbell can be adjusted by removing and installing dumbbell plates of different numbers or weights. Furthermore, the dumbbell bar has connecting terminals and locking components at both ends. One end of the locking component passes through the connecting terminal and extends into the dumbbell bar, and the end of the locking component engages with the thread gap of the external thread on the screw. By fixing the connector to the dumbbell bar, the dumbbell plates between the screw and the dumbbell bar are fixed to the dumbbell bar, preventing the dumbbell plates from falling off the dumbbell bar. Meanwhile, when the locking component is not engaged with the screw, the screw can slide relative to the dumbbell bar inside the dumbbell bar, allowing the user to quickly connect the dumbbell plates to the dumbbell bar via the connector. Afterward, the locking component is inserted into the connecting terminal and engaged with the screw to complete the assembly of this insert dumbbell. This allows the insert dumbbell to be quickly assembled and disassembled and has a simple structure.

[0015] 2. In this invention, the connecting terminal of the dumbbell bar is designed with a threaded hole, in which a locking member is installed and achieves a threaded engagement with the connecting terminal. By rotating the locking member, it can be moved relative to the connecting terminal, ultimately locking one end of the locking member onto the screw. This design allows the connection state between the screw and the dumbbell bar to be controlled by rotating the locking member in the threaded hole, thus facilitating the installation and removal of dumbbell plates. This process is simple to operate. Furthermore, the threaded engagement between the locking member and the connecting terminal restricts the movement of the locking member in the axial direction, preventing accidental disengagement of the locking member from the screw during use, avoiding potential safety risks, and thus enhancing the structural stability and safety of the dumbbell.

[0016] 3. The locking component of this utility model includes a rotating rod and a threaded sleeve. The threaded sleeve is fitted onto the rotating rod, which includes a rotating end and a snap-fit ​​end. The rotating end is exposed relative to the connecting terminal and partially snaps into the threaded sleeve. By rotating the rotating end, the locking component can move closer to or away from the dumbbell bar within the threaded hole. The snap-fit ​​end is designed to match the external thread on the screw. When the rotating rod rotates to the appropriate position, the snap-fit ​​end can tightly engage with the external thread of the screw, achieving a stable connection between the dumbbell plate and the dumbbell bar. The rotating end of the rotating rod allows the user to easily grip and rotate the locking component, while the snap-fit ​​end can be flexibly configured according to the external thread of the screw. The separable rotating rod and threaded sleeve ensure that the locking component can be threadedly connected to the connecting terminal while improving the ease of operation and flexible adaptability of the locking component.

[0017] 4. In this invention, a spring is fitted between the rotating end and the locking end of the rotating rod. A threaded sleeve is sequentially fitted onto the spring and the rotating rod. The two ends of the spring respectively abut against the locking end and the threaded sleeve. Initially, when the locking element and the screw are in the initial disengaged state, rotating the rotating rod causes the rotating rod and the threaded sleeve to rotate synchronously within the threaded hole and move towards the screw along the threaded hole. After moving a certain distance, the threaded sleeve abuts against the boss. At this time, the locking end of the rotating rod abuts against and engages with the threaded gap on the screw, thus fixing the screw. When it is necessary to release the screw, the rotating rod can be rotated in the opposite direction, causing the locking end to gradually move out of the threaded gap. Simultaneously, the rotating rod can be pulled along its axial direction, causing it to move axially away from the threaded sleeve. At this time, the threaded sleeve remains stationary relative to the connecting terminal, and the snap-fit ​​end at least partially passes through the second through hole. The snap-fit ​​end compresses the spring between the threaded sleeve and the rotating rod until the snap-fit ​​end is completely removed from the threaded gap. This allows adjustment of the screw's position relative to the dumbbell rod. After the screw moves, dumbbell plates can be removed or added to the screw. The rotating rod is then released, and it resets under the elastic restoring force of the spring. The snap-fit ​​end re-engages in the threaded gap to fix the screw. With the above structure, this insert dumbbell can more conveniently and efficiently complete the installation and removal of dumbbell plates.

[0018] 5. The rotating end of the rotating rod of this utility model is provided with a locking piece, and the end of the threaded sleeve with the first through hole is provided with a locking groove. The locking piece is placed in the locking groove so that the rotating rod and the threaded sleeve can rotate synchronously. When the locking piece is placed in the locking groove, under the action of the spring, the locking end of the rotating rod is located in the thread gap on the screw, and the rotating rod and the screw are locked and fixed. Pulling the rotating rod along the axial direction of the rotating rod causes the locking piece to disengage from the locking groove, driving the locking end to completely disengage from the thread gap. Then, rotating the rotating rod by a certain angle causes the spring to pull the rotating rod so that the locking piece abuts against the outside of the locking groove, fixing the position of the rotating rod relative to the threaded sleeve at this time, so that the rotating rod and the screw are in a disengaged state, which facilitates the user's disassembly and assembly of dumbbell plates. Then, simply rotating the rotating rod to place the locking piece in the locking groove can automatically lock and fix the screw, making the use of the dumbbell plates more convenient.

[0019] 6. The replacement plate of this utility model has a U-shaped groove with an opening on one side. The screw passes through the U-shaped groove. The design of the U-shaped groove makes it easy for the screw to pass through the replacement plate. Users can directly take out or install the replacement plate onto the screw from the opening of the U-shaped groove. At the same time, the screw does not need to be completely pulled out of the dumbbell bar, which reduces the process of removing the screw completely from the dumbbell bar to install or remove the dumbbell plate, making the use of dumbbells more convenient.

[0020] 7. The dumbbell plates of this utility model are provided with a docking part, which includes a groove and a protrusion. The groove and the protrusion are located on opposite sides of the dumbbell plates respectively. The grooves and protrusions of adjacent dumbbell plates are engaged and locked together. The cooperation of the grooves and protrusions can quickly position multiple dumbbell plates, improving the assembly speed of the dumbbell plates. At the same time, after the assembly is completed, it can restrict the dumbbell plates from sliding along the U-shaped groove on the screw, improving the connection stability between the dumbbell plates and the screw.

[0021] 8. When the dumbbell plates of this utility model are placed horizontally, the dumbbell plates are defined vertically by having opposite upper and lower ends. The opening of the U-shaped groove faces downwards, and the dumbbell plates have a hollowed-out groove near the upper end. This hollowed-out groove prevents the dumbbell plates from being too tightly contacted and thus attracting each other. When the user needs to remove the dumbbell plates, the operation is easier and more convenient. In addition, the user can also use these hollowed-out parts to hold the dumbbell plates and easily remove or install them from the screw along the U-shaped groove, thereby significantly improving the convenience of use.

[0022] 9. The dumbbell plates of this utility model also include a counterweight plate. The counterweight plate is snapped onto the connecting terminal and detachably connected to the fixing plate. Users can choose to replace the counterweight plate with different weights according to their own needs, further enriching the weight adjustment methods of the dumbbell and making the dumbbell suitable for a wider range of people, meeting the needs of more users. The design of the counterweight plate not only facilitates replacement, but also makes the overall structure of the dumbbell more compact through the snap-fit ​​connection with the connecting terminal, reducing the safety hazards caused by loose parts.

[0023] 10. The thickness of the replacement plate in this utility model is set to an integer multiple of the thread clearance. This design ensures that during installation, regardless of the number of replacement plates connected to the screw, the thread clearance on the screw can be aligned with the threaded hole. This avoids the problem of unstable installation or difficulty in installation caused by adjusting the position of the screw due to the number of replacement plates, making the assembly of this insert dumbbell more efficient and easier. [Attached Image Description]

[0024] 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.

[0025] Figure 1 This is an isometric drawing of the dumbbell insert provided in this embodiment of the utility model.

[0026] Figure 2 The dumbbell explosion with insert provided in this embodiment of the utility model Figure 1 .

[0027] Figure 3 The dumbbell explosion with insert provided in this embodiment of the utility model Figure 2 .

[0028] Figure 4 This is a cross-sectional view of the dumbbell insert provided in this embodiment of the utility model. Figure 1 .

[0029] Figure 5 The dumbbell explosion with insert provided in this embodiment of the utility model Figure 3 .

[0030] Figure 6 This is a cross-sectional view of the dumbbell insert provided in this embodiment of the utility model. Figure 2 .

[0031] Figure 7 This is a partial enlarged view of the dumbbell with insert provided in an embodiment of this utility model.

[0032] Explanation of reference numerals in the attached diagram:

[0033] 1. Plate dumbbells;

[0034] 11. Dumbbell bar; 12. Dumbbell plates; 13. Connecting parts; 14. Locking parts;

[0035] 111. Connecting terminal; 121. Replacement piece; 122. Fixing piece; 123. U-shaped groove; 124. Hollowed-out groove; 125. Connecting part; 126. Counterweight piece; 131. Screw; 132. End; 141. Rotating rod; 142. Threaded sleeve; 143. Spring;

[0036] 1111, Threaded hole; 1112, Boss; 1251, Protrusion; 1252, Groove; 1311, External thread; 1312, Thread clearance; 1411, Rotating end; 1412, Snap-fit ​​end; 1413, Snap-fit ​​piece; 1421, First through hole; 1422, Second through hole; 1423, Snap-fit ​​groove.

Detailed Implementation Methods

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Furthermore, in addition to indicating location 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.

[0042] 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.

[0043] In traditional dumbbell designs, weight plates are typically attached to the dumbbell bar via screws. Users can adjust the weight by adding or removing the screws to increase or decrease the number of weight plates. To ensure the weight plates don't loosen due to vibration or other reasons during use, designers incorporate a locking mechanism on the dumbbell bar to secure the screws. However, existing locking mechanisms are often quite complex, increasing both manufacturing costs and assembly difficulty.

[0044] To address the issue of the complex structure of existing adjustable dumbbells, please refer to [reference needed]. Figures 1-4 This utility model provides a plate dumbbell 1, which includes a connector 13, dumbbell plates 12, and a hollow dumbbell bar 11. Connecting terminals 111 are provided at both ends of the dumbbell bar 11. The connector 13 includes a connected end 132 and a screw 131. The screw 131 passes through the dumbbell plates 12 and is partially inserted into the dumbbell bar 11. The end 132 and the connecting terminal 111 clamp the dumbbell plates 12. The screw 131 is provided with an external thread 1311. The connecting terminal 111 is provided with a movably connected locking member 14. One end of the locking member 14 passes through the connecting terminal 111 and extends into the dumbbell bar 11. The end of the locking member 14 is located in the thread gap 1312 of the external thread 1311 to achieve threaded engagement between the locking member 14 and the connector 13.

[0045] The screw 131 of the connector 13 passes through the dumbbell plate 12 and is partially inserted into the dumbbell bar 11, so that the end 132 of the connector 13 and the connecting terminal 111 clamp the dumbbell plate 12 on the screw 131, thereby connecting the dumbbell plate 12 to the dumbbell bar 11 to form the insert dumbbell 1. The overall weight of the insert dumbbell 1 can be adjusted by removing and installing dumbbell plates 12 of different numbers or weights.

[0046] Meanwhile, the connecting terminal 111 is also equipped with a locking member 14. One end of the locking member 14 passes through the connecting terminal 111 and extends into the dumbbell bar 11. The end of the locking member 14 is engaged in the thread clearance 1312 of the external thread 1311 on the screw 131, fixing the connecting member 13 and the dumbbell bar 11 axially, thereby fixing the dumbbell plate 12 to the dumbbell bar 11 and preventing the dumbbell plate 12 from falling off the dumbbell bar 11. When the locking member 14 is not engaged with the screw 131, the screw 131 can slide relative to the dumbbell bar 11 inside the dumbbell bar 11, allowing the user to quickly adjust the position of the connecting member 13 relative to the dumbbell bar 11 and connect the dumbbell plate 12 to the screw 131. After that, the locking member 14 is engaged with the screw 131 to complete the assembly of this insert dumbbell 1. Therefore, this insert dumbbell 1 has a simple structure and is easy to operate, enabling quick assembly and disassembly.

[0047] Specifically, please refer to the following: Figure 5 and Figure 6 The connecting terminal 111 has a threaded hole 1111, and the locking member 14 is located in the threaded hole 1111 and threadedly connected to the connecting terminal 111. Due to the threaded engagement between the locking member 14 and the threaded hole 1111, the locking member 14 can be rotated to move relative to the connecting terminal 111, so that one end of the locking member 14 can be engaged with the screw 131. By rotating the locking member 14 in the threaded hole 1111, the connection state between the screw 131 and the dumbbell rod 11 can be controlled, thereby facilitating the installation and removal of the dumbbell plates 12. This process is simple and easy for users to operate. In addition, the threaded engagement between the locking member 14 and the connecting terminal 111 can also restrict the movement of the locking member 14 in the axial direction, preventing the locking member 14 from accidentally disengaging from the screw 131 during use, thereby enhancing the structural stability and safety of the dumbbell.

[0048] Furthermore, the locking member 14 includes a rotating rod 141 and a threaded sleeve 142, with the threaded sleeve 142 fitted onto the rotating rod 141. The rotating rod 141 includes a rotating end 1411 and a snap-fit ​​end 1412. The rotating end 1411 is exposed relative to the connecting terminal 111 and partially snaps onto the threaded sleeve 142. By rotating the rotating end 1411, the locking member 14 can be moved closer to or further away from the dumbbell rod 11 within the threaded hole 1111. The rotating end 1411 of the rotating rod 141 allows the user to easily hold and rotate the locking member 14. The snap-fit ​​end 1412 is designed to match the external thread 1311 on the screw 131, so that the snap-fit ​​end 1412 can be tightly engaged with the external thread 1311 on the screw 131, realizing a stable connection between the dumbbell plate 12 and the dumbbell rod 11. The separable rotating rod 141 and threaded sleeve 142 ensure that the locking member 14 can be threadedly connected to the connecting terminal 111, while improving the ease of operation and flexible adaptability of the locking member 14.

[0049] Furthermore, please refer to the following: Figures 5-7 A spring 143 is sleeved between the rotating end 1411 and the snap-fit ​​end 1412 of the rotating rod 141. The threaded sleeve 142 is provided with a first through hole 1421 and a second through hole 1422. The rotating rod 141 passes through the first through hole 1421 and the second through hole 1422. The threaded sleeve 142 is sequentially sleeved on the spring 143 and the rotating rod 141. The two ends of the spring 143 abut against the snap-fit ​​end 1412 and the threaded sleeve 142, respectively. The first through hole 1421 is close to the rotating end 1411, and the second through hole 1422 is close to the snap-fit ​​end 1412. The diameter of the first through hole 1421 is smaller than the diameter of the spring 143, and the spring 143 abuts against the inner wall of the end of the threaded sleeve 142 where the first through hole 1421 is located. The diameter of the second through hole 1422 is larger than the diameter of the snap-fit ​​end 1412. A boss 1112 is provided at the bottom of the threaded hole 1111. The threaded sleeve 142 can abut against the boss 1112, and the snap-fit ​​end 1412 extends through the boss 1112 into the interior of the dumbbell bar 11.

[0050] First, the dumbbell insert 1 is assembled when the locking member 14 is in the initial state of disengagement from the screw 131. Rotating the rotating rod 141 causes the rotating rod 141 and the threaded sleeve 142 to rotate synchronously within the threaded hole 1111 and move towards the screw 131 along the threaded hole 1111. After moving a certain distance, the threaded sleeve 142 abuts against the boss 1112. At this time, the locking end 1412 of the rotating rod 141 abuts against and engages within the threaded gap 1312 on the screw 131, thus completing the fixation of the screw 131. When it is necessary to release the fixation of the screw 131, the locking end 1412 can be gradually moved out of the threaded gap 1312 by rotating the rotating rod 141 in the opposite direction.

[0051] Meanwhile, in daily use, the threaded sleeve 142 of the locking member 14 abuts against the boss 1112, and the threaded sleeve 142 remains stationary relative to the connecting terminal 111. The rotating rod 141 can be pulled axially along the rotating rod 141, causing the rotating rod 141 to move axially away from the threaded sleeve 142. The locking end 1412 at least partially passes through the second through hole 1422, and the locking end 1412 compresses the spring 143 between the threaded sleeve 142 and the rotating rod 141 until the locking end 1412... The screw 131 can be completely removed from the threaded gap 1312, thereby adjusting the position of the screw 131 relative to the dumbbell rod 11. After the screw 131 is moved, dumbbell plates 12 can be removed or added to the screw 131. The rotating rod 141 is released, and the rotating rod 141 is reset under the elastic restoring force of the spring 143. The snap-fit ​​end 1412 is re-engaged in the threaded gap 1312 to fix the screw 131. With the above structure, the dumbbell 1 can more conveniently and efficiently complete the installation and removal of dumbbell plates 12.

[0052] Preferably, the rotating end 1411 of the rotating rod 141 is provided with a locking piece 1413, and the end of the threaded sleeve 142 with the first through hole 1421 is provided with a locking groove 1423. The locking piece 1413 is placed in the locking groove 1423 so that the rotating rod 141 and the threaded sleeve 142 can rotate synchronously. When the locking piece 1413 is placed in the locking groove 1423, under the action of the spring 143, the locking end 1412 of the rotating rod 141 is located in the thread gap 1312 on the screw 131, and the rotating rod 141 and the screw 131 are locked and fixed. Pulling the rotating rod 141 along its axial direction causes the engaging piece 1413 to disengage from the engaging groove 1423, thereby causing the engaging end 1412 to completely disengage from the threaded gap 1312. Rotating the rotating rod 141 by a certain angle causes the spring 143 to pull the rotating rod 141, causing the engaging piece 1413 to abut against the outside of the engaging groove 1423. This fixes the position of the rotating rod 141 relative to the threaded sleeve 142, disengaging the rotating rod 141 from the screw 131. This facilitates the user's disassembly and assembly of the dumbbell plates 12. Then, simply rotating the rotating rod 141 allows the engaging piece 1413 to be placed within the engaging groove 1423, automatically engaging and fixing the screw 131, making the use of the dumbbell plates 1 more convenient.

[0053] Specifically, please refer to the following: Figures 2-4 The dumbbell plate 12 has multiple plates, including a fixing plate 122 and a replacement plate 121. The fixing plate 122 contacts and is fixedly connected to the connecting terminal 111, and the replacement plate 121 is detachably connected to the screw 131. When the screw 131 is fixedly connected to the dumbbell bar 11, the end 132 on the connector 13 and the fixing plate 122 on the connecting terminal 111 clamp the replacement plate 121 on the screw 131. The fixing plate 122 can provide a larger contact area, improving the clamping and fixing effect on the replacement plate 121, making the connection between the dumbbell bar 11 and the dumbbell plate 12 more stable.

[0054] Specifically, please refer to Figure 4 The dumbbell plate 12 also includes a counterweight plate 126, which is snapped onto the connecting terminal 111 and detachably connected to the fixing plate 122. Users can choose to replace the counterweight plate 126 with different weights according to their needs, further enriching the weight adjustment methods of the dumbbell and making it suitable for a wider range of users. The design of the counterweight plate 126 not only facilitates replacement but also, through its snap-fit ​​connection to the connecting terminal 111, makes the overall structure of the dumbbell more compact, reducing safety hazards caused by loose parts.

[0055] Further, please refer to Figure 2The replacement plate 121 has a U-shaped groove 123 with an opening on one side, through which the screw 131 passes. The design of the U-shaped groove 123 facilitates the screw 131 passing through the replacement plate 121. Users can directly remove or install the replacement plate 121 onto the screw 131 from the opening of the U-shaped groove 123. At the same time, the screw 131 does not need to be completely pulled out of the dumbbell rod 11, reducing the process of completely removing the screw 131 from the dumbbell rod 11 to remove and install the dumbbell plate 12, making the use of dumbbells more convenient.

[0056] Specifically, please refer to the following: Figure 2 and Figure 3 The dumbbell plates 12 are provided with a mating part 125, which includes a groove 1252 and a protrusion 1251. The groove 1252 and the protrusion 1251 are located on opposite sides of the replacement plate 121, and the grooves 1252 and protrusions 1251 of adjacent dumbbell plates 12 are mated and engaged. The cooperation of the grooves 1252 and protrusions 1251 can quickly position multiple dumbbell plates 12, improving the assembly speed of the dumbbell plates 12. At the same time, after assembly, it can restrict the dumbbell plates 12 from sliding along the U-shaped groove 123 on the screw 131, improving the connection stability between the dumbbell plates 12 and the screw 131.

[0057] Specifically, please refer to Figure 2 When the dumbbell 1 is placed horizontally, the dumbbell plates 12 are defined vertically by their opposite upper and lower ends. The opening of the U-shaped groove 123 faces downwards, and the dumbbell plates 12 have a hollowed-out groove 124 near the upper end. The hollowed-out groove 124 prevents the dumbbell plates 12 from being too tightly connected and thus unable to stick together, making it easier and more convenient for the user to remove the dumbbell plates 12. In addition, the user can also use these hollowed-out parts to hold the dumbbell plates 12 and easily remove or install the dumbbell plates 12 from the screw 131 along the U-shaped groove 123, thereby significantly improving the convenience of use.

[0058] Specifically, the thickness of the replacement plate 121 is set to an integer multiple of the thread clearance 1312. This design ensures that during installation, regardless of the number of replacement plates 121 connected to the screw 131, the thread clearance 1312 on the screw 131 will always align with the threaded hole 1111. This avoids the problem of unstable installation or difficulty in installation caused by adjusting the position of the screw 131 due to the number of replacement plates 121, making the assembly of this insert dumbbell 1 more efficient and easier. Preferably, the thickness of the replacement plate 121 is the same as the thread clearance 1312. In this case, the locking member 14 can smoothly engage with the external thread 1311 of the screw 131 without additional adjustment steps, further simplifying the assembly process of the insert dumbbell 1 and improving the user experience.

[0059] This embodiment provides a dumbbell 1 with insert plates, which consists of a connector 13, dumbbell plates 12, and a hollow dumbbell bar 11. The screw 131 of the connector 13 passes through the dumbbell plates 12 and is inserted into the dumbbell bar 11. Locking members 14 are provided on the connecting terminals 111 at both ends of the dumbbell bar 11. One end of the locking member 14 is locked onto the screw 131 to fix the screw 131, so that the end 132 of the connector 13 and the connecting terminals 111 clamp the dumbbell plates 12 to form the dumbbell 1 with insert plates. Users can adjust the overall weight of the dumbbell 1 by adjusting the connection state of the screw 131 relative to the dumbbell bar 11 and assembling and disassembling different numbers or weights of dumbbell plates 12.

[0060] When the screw 131 disengages from the dumbbell bar 11, the screw 131 can slide relative to the dumbbell bar 11, facilitating quick adjustment of the position of the connector 13 and completing the disassembly and assembly of the dumbbell plate 12, thus enabling rapid assembly of the insert dumbbell 1. Simultaneously, the locking component 14 includes a rotating rod 141, a spring 143, and a threaded sleeve 142. The locking component 14 is threadedly connected to the connecting terminal 111 through a threaded hole 1111. Rotating the rotating rod 141 moves the locking component 14 relative to the connecting terminal 111, causing the locking end 1412 of the rotating rod 141 to engage in the thread gap 1312 of the external thread 1311 on the screw 131, thus fixing the screw 131. To release the screw 131, the rotating rod 141 is rotated in the opposite direction, causing the locking end 1412 to move out of the thread gap 1312. Simultaneously, the rotating rod 141 can be pulled axially to move it away from the threaded sleeve 142. At this time, the threaded sleeve 142 is stationary, and the snap-fit ​​end 1412 passes through the second through hole 1422, compressing the spring 143 until it is completely removed from the thread gap 1312. After releasing the screw 131, its position can be adjusted, and dumbbell plates 12 can be removed or added. Then, the rotating rod 141 is released again, and the spring 143's restoring force returns it to its original position, re-fixing the screw 131 with the snap-fit ​​end 1412. This structure makes the assembly and disassembly of the dumbbell plates 12 more convenient and efficient. This insert dumbbell 1 ensures the connection and fixation effect between the dumbbell plates 12 and the dumbbell bar 11, while its locking structure is simple and easy to operate, allowing for quick assembly and disassembly of the insert dumbbell 1.

[0061] 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. An insertable dumbbell characterized by: The device includes a connector, dumbbell plates, and a hollow dumbbell bar. Connecting terminals are provided at both ends of the dumbbell bar. The connector includes a connected end and a screw. The screw passes through the dumbbell plates and is partially inserted into the dumbbell bar. The end and the connecting terminals clamp the dumbbell plates. The screw has an external thread, and the connecting terminals have a movably connected locking member. One end of the locking member passes through the connecting terminal and extends into the dumbbell bar, with the end of the locking member located within the thread clearance of the external thread to achieve a threaded engagement between the locking member and the connector.

2. A plate dumbbell according to claim 1, wherein: The connecting terminal is provided with a threaded hole, and the locking member is disposed in the threaded hole and threadedly connected to the connecting terminal.

3. An insert dumbbell according to claim 2, wherein: The locking component includes a rotating rod and a threaded sleeve, the threaded sleeve being fitted onto the rotating rod; the rotating rod includes a rotating end and a snap-fit ​​end, the rotating end being exposed relative to the connecting terminal and partially snapped onto the threaded sleeve, by rotating the rotating end, the locking component can be moved closer to or away from the dumbbell rod within the threaded hole.

4. A plate dumbbell according to claim 3, wherein: A spring is fitted between the rotating end and the snap-fit ​​end of the rotating rod. The threaded sleeve has a first through hole and a second through hole. The rotating rod passes through the first through hole and the second through hole. The threaded sleeve is sequentially fitted onto the spring and the rotating rod. The two ends of the spring abut against the snap-fit ​​end and the threaded sleeve, respectively. The first through hole is close to the rotating end, and the second through hole is close to the snap-fit ​​end. The diameter of the first through hole is smaller than the diameter of the spring, and the spring abuts against the inner wall of the end of the threaded sleeve where the first through hole is located. The diameter of the second through hole is larger than the diameter of the snap-fit ​​end.

5. An insert dumbbell according to claim 4, wherein: The rotating end of the rotating rod is provided with a locking piece, and the end of the threaded sleeve with the first through hole is provided with a locking groove, and the locking piece is placed in the locking groove; when the locking piece is placed in the locking groove, under the action of the spring, the locking end of the rotating rod is located in the thread gap on the screw.

6. A dumbbell with insert plates according to claim 1, characterized in that: The dumbbell plates are provided in multiple pieces, including a fixed plate and a replaceable plate. The fixed plate is in contact with and fixedly connected to the connecting terminal, and the replaceable plate is detachably connected to the screw. The replaceable plate is provided with a U-shaped groove with an opening on one side, and the screw passes through the U-shaped groove.

7. An insert dumbbell according to claim 6, wherein: The dumbbell plates are provided with a docking part, which includes a groove and a protrusion. The groove and the protrusion are located on opposite sides of the dumbbell plates, and the groove and the protrusion of adjacent dumbbell plates are engaged with each other.

8. An insert dumbbell according to claim 6, wherein: When the dumbbell plate is placed horizontally, the dumbbell plate is defined in the vertical direction as having an upper end and a lower end opposite each other. The opening of the U-shaped groove faces the lower end, and the dumbbell plate is provided with a hollowed-out groove near the upper end.

9. An insert dumbbell according to claim 6, wherein: The dumbbell plate also includes a counterweight plate, which is snapped onto the connecting terminal and detachably connected to the fixing plate.

10. The insert dumbbell of claim 6, wherein: The thickness of the replacement piece is set to an integer multiple of the thread clearance.

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