Improved dumbbell with adjustable counter weight

Abstract

The improved dumbbell comprises a dumbbell rod assembly, a plurality of balance weight discs and a base used for placing the dumbbell rod assembly and the balance weight discs, the dumbbell rod assembly comprises a mandrel, a fixed disc, a gear rotating disc, a positioning ring and a plurality of connecting flanges, the gear rotating disc drives the positioning ring and the connecting flanges to rotate simultaneously by rotating the mandrel, a rotating interference device for preventing the mandrel from rotating is arranged in the fixing disc, and an unlocking device is arranged on the base. The rotary interference device is of an integrated structure and comprises an annular supporting part, a limiting column protruding towards the inner ring of the annular supporting part and an abutting part. The positioning ring is arranged in an inner ring of the annular supporting part, and a reset spring is further arranged on the annular supporting part; a plurality of gear holes are evenly distributed in the outer ring face of the positioning ring, and the lower limiting columns are clamped into the gear holes to limit rotation of the mandrel under the action of the reset springs.

Description

Technical Field

[0001] This application relates to the field of fitness equipment technology, and in particular to an improved adjustable weight dumbbell. Background Technology

[0002] Dumbbells are widely used fitness equipment, used to provide endurance training in a variety of exercises, such as bicep curls, dumbbell presses, shoulder squeezes, and tricep extensions. Because dumbbells can be used to perform a wide variety of exercises, users often need many different dumbbells of varying weights to complete their routines. Traditional dumbbells are somewhat inconvenient to use because whenever the user wants to change the weight, they must either choose a heavier dumbbell or disassemble their existing dumbbells and change the weight.

[0003] Currently, there are many adjustable weight dumbbells on the market. They are easy to use, can firmly hold the weight on the bar, and allow for a variety of weight options on a single bar.

[0004] As one implementation method, referring to the Chinese invention patent application number CN2020105770817 filed by the applicant on June 23, 2020, a dumbbell with easy weight adjustment is disclosed, including a dumbbell bar assembly, a counterweight plate and a base. The dumbbell drives the spindle and connecting flange to rotate through the gear rotation disc. Combined with the rotation interference device and the unlocking device, multiple weight adjustment levels can be achieved, which is convenient to operate.

[0005] Regarding this patent, please refer to Figure 13 in the patent publication. The rotating interference device in this patent includes top rods positioned on the front and rear sides of the positioning ring, a pressure rod positioned above the top rods, and a return spring positioned above the pressure rods. The unlocking device includes a top post mounted on the base and cooperating with the top rods. A limiting post is positioned below the pressure rod. Multiple stop holes are evenly distributed on the outer surface of the positioning ring. Under the action of the return spring, the limiting post engages in the stop holes to restrict the rotation of the spindle. This rotating interference device structure involves multiple different components, resulting in relatively complex assembly and insufficiently direct force transmission, requiring further improvement.

[0006] Furthermore, referring to the adjustable weight dumbbell proposed in application number CN2024109737661, its inner end plate is also equipped with a spring pin assembly, and the positioning turntable has multiple positioning holes constructed along its circumference; when the positioning turntable rotates, the steel ball on the spring pin assembly can engage or disengage from the positioning holes. The cooperation between the spring pin assembly and the multiple positioning holes can provide feedback to the user with the sound of the steel ball engaging in the positioning hole, thereby letting the user know that the adjustment is now in place. (As in this patent...) Figure 6 and Figure 10It can be seen that the steel ball protrudes from the inner end plate to cooperate with different positioning holes on the positioning turntable. During assembly, the steel ball is relatively easy to fall out because it is not pre-limited, which affects the assembly efficiency. Summary of the Invention

[0007] Based on this, this application provides an improved adjustable weight dumbbell, which solves at least one of the above-mentioned technical problems.

[0008] The technical solution adopted by this application to solve its technical problem is: an improved adjustable weight dumbbell, including a dumbbell bar assembly, multiple weight plates, and a base for placing the dumbbell bar assembly and multiple weight plates. The dumbbell bar assembly includes a spindle and a fixed plate and a gear shifting disc fixed on the left and right sides of the spindle, as well as a positioning ring and multiple connecting flanges. The gear shifting disc is fixed to the end of the spindle. The gear shifting disc drives the positioning ring and multiple connecting flanges to rotate simultaneously by rotating the spindle. At least one flange protrusion is provided on the side of each connecting flange, and at least one weight protrusion is provided on the side of each weight plate. The weight protrusion of the weight plate cooperates with the flange protrusion of the corresponding connecting flange. A rotation interference device to prevent the spindle from rotating is provided in the fixed plate, and an unlocking device to unlock the rotation interference device is provided on the base. Multiple gear holes are arranged in a ring on the outer surface of the positioning ring.

[0009] The rotating interference device is an integral structure, which includes an annular support part, a limiting post protruding into the inner circle of the annular support part, and a contact part;

[0010] The positioning ring is placed in the inner ring of the annular support, and a return spring is also provided on the annular support.

[0011] When the dumbbell bar assembly is placed on the base, the unlocking device contacts the abutment, providing a force to lift the annular support, allowing the spindle and positioning ring to rotate. When the dumbbell bar assembly is detached from the base, the abutment is not subjected to force, and the return spring drives the limiting post of the annular support to insert into one of the stop holes to restrict the rotation of the spindle and positioning ring.

[0012] In some embodiments, a positioning steel ball and a connecting piece for covering the side of the fixed disk are provided on one side of the fixed disk. The connecting piece is provided with a first circular hole. The fixed disk is also provided with a spring for driving the positioning steel ball, which protrudes from the surface of the connecting piece.

[0013] On the side of the fixed plate, there is also a positioning plate that rotates synchronously with the spindle. The positioning plate has multiple second circular holes evenly distributed in a ring. When the spindle rotates, the positioning plate rotates relative to the fixed plate, and the positioning steel ball is placed in different second circular holes, and a prompt sound is emitted during this process.

[0014] In some embodiments, the fixed disk has a first annular wall and a second annular wall formed concentrically, and an annular space is formed between the first annular wall and the second annular wall. The annular support is placed in the annular space and moves within it. The upper part of the first annular wall has a first clearance hole for the limiting post to pass through, and the lower part of the second annular wall has a second clearance hole for the abutment to pass through.

[0015] In some embodiments, the unlocking device is a boss formed on the base.

[0016] In some embodiments, the abutting portion protrudes and extends downward toward the annular support portion.

[0017] In some embodiments, the annular support portion is further provided with a spring limiting groove and a spring limiting post placed in the spring limiting groove. The reset spring is sleeved on the spring limiting post, with the upper part of the reset spring abutting against the inner wall of the fixed plate and the lower part of the reset spring abutting against the spring limiting groove.

[0018] In some embodiments, a plurality of positioning plates are evenly distributed around the outer periphery of the positioning disk, and a positioning groove is formed between every two spaced positioning plates. A corresponding blocking plate is provided on the base. The blocking plate is positioned above the positioning plate or above the positioning groove depending on the different angles of the positioning disk relative to the fixed disk. When the blocking plate is positioned above the positioning groove, the dumbbell bar assembly can detach from the base. When the blocking plate is positioned above the positioning plate, the dumbbell bar assembly will not be able to detach from the base.

[0019] In some embodiments, the outer contour of the mandrel is polygonal, and the inner contours of the gear shift disc, the positioning ring, and each connecting flange match the outer contour of the mandrel.

[0020] In some embodiments, each connecting flange includes a boss sleeve and a recessed platform. The boss sleeve of an adjacent connecting flange is placed in the recessed platform of another connecting flange to form a gap between the connecting flanges. However, the adjacent connecting flanges are assembled independently and have no direct connection relationship.

[0021] The beneficial effects of this application are as follows: primarily, the rotating interference device has been optimized and designed as an integrated structure, including an annular support, a limiting post protruding into the inner circle of the annular support, and a contact part. This integrated structure can be integrally formed or the components can be fastened together to form a whole by fasteners, thereby simplifying the structure and greatly improving assembly efficiency.

[0022] Secondly, connecting plates were added to the positioning steel balls and springs to limit their movement, preventing the positioning steel balls from easily coming out during assembly and further improving assembly efficiency.

[0023] In addition, the outer contour of the mandrel is set as a polygon, and the inner contours of the gear rotary disc, positioning ring, and each connecting flange are matched with the outer contour of the mandrel, so as to facilitate the machining and forming of the mandrel. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall assembly structure of this application.

[0026] Figure 2 This is a schematic diagram of the dumbbell bar assembly structure of this application.

[0027] Figure 3 This is one of the internal structural diagrams of the dumbbell bar assembly placed on the base in this application.

[0028] Figure 4 This is the second schematic diagram of the internal structure of the dumbbell bar assembly placed on the base in this application.

[0029] Figure 5 This is a schematic diagram of the rotating interference device structure of this application.

[0030] Figure 6 This is a schematic diagram of the fixed disk structure of this application.

[0031] Figure 7 This is the third schematic diagram of the internal structure of the dumbbell bar assembly placed on the base in this application.

[0032] Figure 8 This is a schematic diagram of the internal structure of this application.

[0033] Figure 9 This is a schematic diagram of the positioning disk structure of this application.

[0034] Figure 10 This is a schematic diagram of the configuration disk structure in this application.

[0035] Reference numerals: 1. Dumbbell bar assembly; 11. Spindle; 111. Grip; 12. Fixing plate; 121. First annular wall; 1211. First clearance hole; 122. Second annular wall; 1221. Second clearance hole; 13. Gear rotation plate; 14. Positioning ring; 141. Gear hole; 15. Connecting flange; 151. Flange protrusion; 152. Boss sleeve; 153. Sinking platform; 2. Counterweight plate; 21. Counterweight protrusion; 3. Base; 31. Unlocking device; 32. Blocking plate; 4. Rotation interference device; 41. Annular support; 411. Spring limiting groove; 412. Spring limiting post; 42. Limiting post; 43. Contact part; 5. Return spring; 6. Positioning steel ball; 7. Connecting piece; 71. First round hole; 8. Positioning plate; 81. Second round hole; 82. Positioning piece; 83. Positioning groove. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection of this application.

[0037] Reference Figure 1-10 As shown, this application proposes an improved adjustable weight dumbbell, including a dumbbell bar assembly 1, multiple weight plates 2, and a base 3 for placing the dumbbell bar assembly 1 and the multiple weight plates 2. The dumbbell bar assembly 1 includes a spindle 11, fixed plates 12 and a gear shifting disc 13 fixed to the left and right sides of the spindle 11, a positioning ring 14, and multiple connecting flanges 15. The gear shifting disc 13 is fixed to the end of the spindle 11. The gear shifting disc 13 drives the positioning ring 14 and the multiple connecting flanges 15 by rotating the spindle 11. 5. At the same time, at least one flange protrusion 151 is provided on the side of each connecting flange 15, and at least one counterweight protrusion 21 is provided on the side of each counterweight plate 2. The counterweight protrusion 21 of the counterweight plate 2 cooperates with the flange protrusion 151 of the corresponding connecting flange 15. A rotation interference device 4 to prevent the spindle 11 from rotating is provided in the fixed plate 12. An unlocking device 31 to unlock the rotation interference device 4 is provided on the base 3. Multiple stop holes 141 are arranged in a ring on the outer ring surface of the positioning ring 14.

[0038] Specifically, the rotating interference device 4 is an integral structure, including an annular support 41, a limiting post 42 protruding into the inner circle of the annular support 41, and an abutment part 43. This integral structure can be integrally molded, or the various components can be fastened together to form a whole by fasteners. Preferably, it adopts an integral injection molding method. This design simplifies the structure and greatly improves assembly efficiency.

[0039] In addition, the positioning ring 14 is placed in the inner ring of the annular support 41, and a return spring 5 is also provided on the annular support 41. When the dumbbell bar assembly 1 is placed on the base 3, the unlocking device 31 contacts the abutment 43, providing a force for lifting the annular support 41. At this time, the limiting post 42 is not inserted into the position hole 141 of the positioning ring 14, so that the spindle 11 and the positioning ring 14 can be rotated by rotating the position rotating disk 13, thereby selecting the required counterweight. After the counterweight is selected, when the dumbbell bar assembly 1 is lifted to separate it from the base 3, the abutment 43 is no longer subjected to force, and the return spring 5 drives the limiting post 42 of the annular support 41 to be inserted into one of the position holes 141 to limit the rotation of the spindle 11 and the positioning ring 14, thereby ensuring safety during use.

[0040] The following will continue to describe some preferred / improved embodiments based on the above embodiments. Any one of the following embodiments can be selected, or multiple embodiments can be combined.

[0041] Furthermore, a positioning steel ball 6 and a connecting piece 7 for covering this side of the fixed plate 12 are provided on one side surface of the fixed plate 12. The connecting piece 7 is provided with a first circular hole 71. The fixed plate 12 is also provided with a spring that drives the positioning steel ball 6, with a portion protruding from the surface of the connecting piece 7. On this side of the fixed plate 12, a positioning plate 8 is also provided, which rotates synchronously with the spindle 11. The positioning plate 8 is provided with a plurality of second circular holes 81 evenly distributed in a ring. When the spindle 11 rotates, the positioning plate 8 rotates relative to the fixed plate 12, and the positioning steel ball 6 is placed in different second circular holes 81, and a prompt sound is emitted during this process. In this way, prompts can be given to the user during the adjustment of the gear position, and the operating feel during the rotation of the spindle 11 can be improved. In addition, by providing the connecting piece 7, the spring and the positioning steel ball 6 can be assembled onto the fixed plate 12 first during assembly, and then the connecting piece 7 can be fastened to the fixed plate 12 with several screws. In this way, the positioning steel ball 6 and the spring will not fall off during assembly. In existing products, the connecting piece 7 is not provided.

[0042] The fixed plate 12 has a concentric first annular wall 121 and a second annular wall 122, and an annular space is formed between the first annular wall 121 and the second annular wall 122. The annular support part 41 is placed and moves within this annular space. The upper part of the first annular wall 121 has a first clearance hole 1211 for the limiting post 42 to pass through, and the lower part of the second annular wall 122 has a second clearance hole 1221 for the abutment part 43 to pass through. This annular space can achieve pre-limiting of the annular support part 41. For example, in some cases, when the dumbbell bar assembly 1 is placed on the base 3, the lower part of the inner ring of the annular support part 41 abuts against the lower part of the first annular wall 121. When the dumbbell bar assembly 1 is removed from the base 3, the upper part of the inner ring of the annular support part 41 abuts against the upper part of the first annular wall 121.

[0043] In one specific embodiment of the unlocking device 31, the unlocking device 31 is a boss formed on the base 3. The abutment part 43 is a protruding rod that protrudes and extends downward toward the annular support part 41.

[0044] To facilitate the installation and positioning of the reset spring 5, the annular support 41 is also provided with a spring limiting groove 411 and a spring limiting post 412 placed in the spring limiting groove 411. The reset spring 5 is sleeved on the spring limiting post 412, with the upper part of the reset spring 5 abutting against the inner wall of the fixed plate 12 and the lower part of the reset spring 5 abutting against the spring limiting groove 411.

[0045] In addition, a plurality of positioning pieces 82 are evenly distributed around the outer periphery of the positioning disk 8, and a positioning groove 83 is formed between every two spaced positioning pieces 82. A corresponding blocking piece 32 is provided on the base 3. The blocking piece 32 is positioned above the positioning piece 82 or above the positioning groove 83 depending on the different angles of the positioning disk 8 relative to the fixed disk 12. When the blocking piece 32 is positioned above the positioning groove 83, the dumbbell bar assembly 1 can be detached from the base 3. When the blocking piece 32 is positioned above the positioning piece 82, the dumbbell bar assembly 1 will not be able to detach from the base 3.

[0046] To facilitate the machining of the mandrel 11, the outer contour of the mandrel 11 is polygonal, such as a regular hexagon; the inner contours of the gear shift rotary disk 13, the positioning ring 14, and each connecting flange 15 match the outer contour of the mandrel 11.

[0047] Regarding the specific structure of the connecting flange 15, in this embodiment, each connecting flange 15 includes a boss sleeve 152 and a recessed platform 153. The boss sleeve 152 of an adjacent connecting flange 15 is placed inside the recessed platform 153 of another connecting flange 15 to separate the connecting flanges 15 and form a gap. However, each adjacent connecting flange 15 is assembled independently and has no direct connection relationship.

[0048] For easier gripping, a soft rubber grip 111 is provided in the middle area of ​​the spindle 11.

[0049] Regarding the aforementioned improved adjustable weight dumbbell, its weight adjustment method and the assembly method of some other components are not the core improvement technology points of this application. Those skilled in the art can refer to the patent document CN111569356B submitted by the applicant, so it will not be elaborated here.

[0050] The various embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of this application. The foregoing embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An improved adjustable weight dumbbell, comprising a dumbbell bar assembly, multiple weight plates, and a base for placing the dumbbell bar assembly and multiple weight plates. The dumbbell bar assembly includes a spindle and fixed plates and a shift disc fixed on the left and right sides of the spindle, as well as a positioning ring and multiple connecting flanges. The shift disc is fixed to the end of the spindle. The shift disc rotates the spindle, thereby causing the positioning ring and multiple connecting flanges to rotate simultaneously. At least one flange protrusion is provided on the side of each connecting flange, and at least one weight protrusion is provided on the side of each weight plate. The weight protrusion of the weight plate cooperates with the flange protrusion of the corresponding connecting flange. A rotation interference device to prevent the spindle from rotating is provided in the fixed plate, and an unlocking device to unlock the rotation interference device is provided on the base. Multiple shift holes are arranged in a ring on the outer surface of the positioning ring. Its features are, The rotating interference device is an integral structure, which includes an annular support part, a limiting post protruding into the inner ring of the annular support part, and a contact part; the positioning ring is placed in the inner ring of the annular support part, and a return spring is also provided on the annular support part; When the dumbbell bar assembly is placed on the base, the unlocking device contacts the abutment, providing a force to lift the annular support, allowing the spindle and positioning ring to rotate. When the dumbbell bar assembly is detached from the base, the abutment is not subjected to force, and the return spring drives the limiting post of the annular support to insert into one of the stop holes to restrict the rotation of the spindle and positioning ring.

2. The improved weight-adjustable dumbbell according to claim 1, wherein, The fixed disk is provided with a positioning steel ball and a connecting piece for covering this side of the fixed disk. The connecting piece is provided with a first round hole. The fixed disk is also provided with a spring for driving the positioning steel ball, which protrudes from the surface of the connecting piece. On the side of the fixed plate, there is also a positioning plate that rotates synchronously with the spindle. The positioning plate has multiple second circular holes evenly distributed in a ring. When the spindle rotates, the positioning plate rotates relative to the fixed plate, and the positioning steel ball is placed in different second circular holes, and a prompt sound is emitted during this process.

3. The improved weight-adjustable dumbbell according to claim 1, wherein, The fixed plate has a first annular wall and a second annular wall forming concentrically, and an annular space is formed between the first annular wall and the second annular wall. The annular support part is placed in the annular space and moves within it. The upper part of the first annular wall has a first clearance hole for the limiting post to pass through, and the lower part of the second annular wall has a second clearance hole for the abutment part to pass through.

4. The improved weight-adjustable dumbbell according to claim 1, wherein, The unlocking device is a protrusion formed on the base.

5. The improved weight-adjustable dumbbell according to claim 1, wherein, The contact portion protrudes and extends downward toward the annular support portion.

6. The improved weight-adjustable dumbbell according to claim 1, wherein The annular support portion is also provided with a spring limiting groove and a spring limiting post placed in the spring limiting groove. The reset spring is sleeved on the spring limiting post, with the upper part of the reset spring abutting against the inner wall of the fixed plate and the lower part of the reset spring abutting against the spring limiting groove.

7. The improved weight-adjustable dumbbell according to claim 2, wherein The positioning disc has multiple positioning plates evenly distributed around its outer periphery, and a positioning groove is formed between every two spaced positioning plates. A corresponding blocking plate is provided on the base. The blocking plate is positioned above the positioning plate or above the positioning groove depending on the different angles of the positioning disc relative to the fixed disc. When the blocking plate is positioned above the positioning groove, the dumbbell bar assembly can detach from the base. When the blocking plate is positioned above the positioning plate, the dumbbell bar assembly will not be able to detach from the base.

8. The improved weight-adjustable dumbbell according to claim 1, wherein The outer contour of the mandrel is polygonal, and the inner contours of the gear shift disc, positioning ring, and each connecting flange match the outer contour of the mandrel.

9. The improved weight-adjustable dumbbell according to claim 1, wherein, Each connecting flange includes a boss sleeve and a recessed platform. The boss sleeve of an adjacent connecting flange is placed inside the recessed platform of another connecting flange to create a gap between the connecting flanges. However, the adjacent connecting flanges are assembled independently and have no direct connection relationship.

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