Weight-adjustable kettlebell

Abstract

Disclosed is a weight-adjustable kettlebell, including a housing, a handle, a plurality of weight plates, and a base, wherein the housing includes an inner housing, an outer housing and a weight support frame attached to the inner and outer housings, and the weight support frame is provided with hangers corresponding to the weight plates; the weight plates are located and stacked in sequence, each weight plate is provided with an arc-shift mechanism corresponding to the hangers, and the arc-shift mechanisms are progressively shortened from top to bottom, forming weight adjustment positions; the base is provided with a center locating seat, a rotary disc is arranged between the base and the center locating seat, and the weight plates are located on the center locating seat. With the above-mentioned structure, the weight-adjustable kettlebell has the advantages of rational structural design, simple and convenient rotation adjustment, and excellent stability.

Description

TECHNICAL FIELD

[0001] The present invention relates to the technical field of sports and fitness equipment, particularly to a weight-adjustable kettlebell capable of adjusting the kettlebell weight through handle rotation.BACKGROUND

[0002] Kettlebells are a common type of fitness equipment used in strength and compound training. During training, the handle is typically gripped with both hands and swung in dynamic motions, so that more muscle groups can be trained to promote healthy and coordinated development of all body parts. Conventional kettlebells are integrally molded and unchangeable in weight. To accommodate different training intensities and requirements, a set of kettlebells with varying weights is required, which is more suitable for purchasing as a complete set to be used in commercial gyms, while home users rarely buy complete sets.

[0003] To address the problems of the traditional kettlebells with fixed and non-adjustable weights and the need for purchasing as a complete set, Chinese Patent Publication No. CN217246498U discloses a weight-adjustable kettlebell. This structure allows users to obtain variable kettlebell weights by simply inserting pins into different positions to adjust the number of internal weight plates. A single kettlebell can replace a set of traditional kettlebells, facilitating more cost-effective, convenient, space-saving uses both in commercial gyms and at home, so that the above-mentioned problems existing in the traditional kettlebells are effectively addressed. However, this structure still has the following shortcomings during use: firstly, each weight block requires installation of limiting components used with pins, resulting in too complex weight block structures, inconvenient production and installation, as well as the risk of failure of the limiting components; secondly, due to the absence of a base for the weight blocks, the weight blocks are prone to misalignment during weight adjustment, resulting in failure to arrange the weight blocks neatly; thirdly, an excessive clearance between weight blocks can generate mechanical collision noise during training; further improvements are required.SUMMARY

[0004] To address the above-mentioned problems existing in the prior art, the objective of the present invention is to provide an weight-adjustable kettlebell featuring rational structural design, simple and convenient weight adjustment by rotation, safe and reliable use, small fit clearance, and excellent stability.

[0005] A technical solution adopted by the present invention to address the above-mentioned technical problems includes a housing, a handle attached to the housing, a plurality of weight plates, and a base, wherein the housing includes an inner shell, an outer shell and a weight support frame fixedly connected with the inner and outer shells, and the weight support frame is provided with hanging members corresponding to the weight plates; the weight plates are located and stacked in an arrangement sequence, each weight plate is provided with an arc-shaped engagement ridges corresponding to the hanging members, and the arc-shaped engagement ridges on the weight plates are progressively shortened from top to bottom, forming weight adjustment positions; the base is provided with a center positioning seat, a turnplate is arranged between the base and the center positioning seat, the weight plates are located on the center positioning seat, and the housing is located on the turnplate and encloses the weight plates; when the handle drives the housing to rotate, the hanging members on the weight support frame slide beneath the arc-shaped engagement ridges of the corresponding weight plates to achieve weight adjustment.

[0006] In a further embodiment of the present invention, a rotation locking device for the weight plates is arranged in the housing, the rotation locking device includes a guide rod slidably arranged on the housing, a weight plate locking block fixedly connected with the top of the guide rod, and a locking block spring for applying elastic force to the weight plate locking block, the uppermost weight plate is provided with anti-rotation locating grooves which engage with the weight plate locking block, and the number of the anti-rotation locating grooves corresponds to the number of weight adjustment positions; when the housing is arranged on the turnplate, the guide rod is pressed against the turnplate, the weight plate locking block disengages from the corresponding anti-rotation locating groove under the action of the guide rod to achieve unlocking, allowing the housing to rotate relative to the weight plates for weight adjustment; when the handle is lifted, the guide rod disengages from the turnplate, the weight locking block engages with the corresponding anti-rotation locating groove under the action of the locking block spring to achieve locking, so that the weight plate cannot rotate relative to the housing.

[0007] In a further embodiment of the present invention, the turnplate is fixedly provided with a bottom cover, and a turnplate position locking device is arranged between the turnplate and the bottom cover; the turnplate position locking device includes a position locking plate, a locking plate spring, a locking pin and a locking pin spring, the center positioning seat is provided with position notches matching the weight adjustment positions, and the position locking plate is provided with locking grooves and locking heads engaging with the position notches to achieve locking; the locking pin is provided with a straight pin portion movable relative to the locking groove at the upper part, and an immobilized locking portion matching the locking groove at the lower part; the position locking plate is horizontally arranged on the turnplate through the locking plate spring, the locking pin is arranged in the locking groove and longitudinally arranged between the turnplate and the bottom cover through the locking pin spring, and the straight pin portion of the locking pin protrudes from the straight pin hole of the turnplate to engage with the housing; when the housing is pressed against the straight pin portion, the locking pin moves downward, so that the position locking plate can move outward relative to the straight pin portion and release the locking of the turnplate, then when the handle is rotated, the position locking plate overcomes the elastic force of the locking plate spring and moves from the previous position notch to the next position notch, and the housing and the turnplate rotate synchronously to achieve weight adjustment; when the housing disengages from the straight pin portion, the locking pin is propelled upward under the action of elastic force of the locking pin spring, the locking portion engages with the locking groove, so that the position locking plate is immobilized, and the locking head engages with the position notch to lock the turnplate.

[0008] In a further embodiment of the present invention, the weight support frame is fixedly provided with a center locating member, the weight plate is provided with a center locating groove at the upper part and a weight plate locating block at the bottom, the center positioning seat is provided with weight plate locating grooves, the center locating member on the weight support frame rotatably engages with the center locating groove of the topmost weight plate, the weight plate locating block of the bottommost weight plate engages with the weight plate locating groove on the center positioning seat to achieve locating, and the weight plates engage with the center locating groove through the weight plate locating blocks to achieve locating.

[0009] In a further embodiment of the present invention, the turnplate is provided with a housing locating seat, and the housing is provided with a locating guide member that engages with the housing locating seat to achieve locating.

[0010] In a further embodiment of the present invention, the center positioning seat is provided with an initial position arrow, and the weight plates are provided with weight plate locating arrows and numerals.

[0011] In a further embodiment of the present invention, the base is provided with a weight indication window synchronized with the weight adjustment position angle, and the turnplate is provided with an indication arrow engaging with the window to indicate the weight.

[0012] In a further embodiment of the present invention, a weight dial and a transparent cover for enclosing the weight dial are installed on the weight indication window.

[0013] Compared with the prior art, the structure adopted has the following advantages and effects: firstly, when the kettlebell is in a static placement state, the weight of the kettlebell can be adjusted in the position sequence by simply rotating the handle to achieve simple and convenient weight adjustment. Secondly, during kettlebell weight adjustment, the corresponding hanging members on the weight support frame engage with the arc-shaped engagement ridges of the corresponding weight plates, and at least two sets of hanging members engage with the corresponding arc-shaped engagement ridges to hold the weight plates, with a small engagement clearance, compact engagement of weight plates, stable and reliable connection, and minimal wobble. Thirdly, upon completion of weight adjustment, the weight plate is automatically locked to the housing through rotation of the locking device, so that the weight plate cannot rotate relative to the housing, this ensures zero plate detachment during training, thus guaranteeing kettlebell safety in use. Fourthly, the weight plate can rotate freely through the turnplate position locking device during weight adjustment, and the turnplate is locked to the center positioning seat automatically when the handle is lifted to guarantee synchronization between position indication and weight adjustment.BRIEF DESCRIPTION OF DRAWINGS

[0014] FIG. 1 is an exploded structure view of the present invention.

[0015] FIG. 2 is a bottom structure view of the handle assembly of the present invention.

[0016] FIG. 3 is a spatial structure view of the handle assembly of the present invention.

[0017] FIG. 4 is an exploded structure view of the handle assembly of the present invention.

[0018] FIG. 5 is an exploded structure view of the base assembly of the present invention.

[0019] FIG. 6 is a front view structure view of the present invention.

[0020] FIG. 7 is a structure view of the section A-A of the present invention.

[0021] FIG. 8 is a structure view of the section B-B engagement structure without mounted plates of the present invention.

[0022] FIG. 9 is a structure view of the section B-B engagement structure with all mounted plates of the present invention.

[0023] In the figures: 1 handle, 2 outer shell, 3 weight plate, 4 weight plate locating arrow and numeral, 5 center positioning seat, 6 turnplate, 7 base, 8 housing locating seat, 9 center locating groove, 10 anti-rotation locating groove, 11 arc-shaped engagement ridges, 12 weight plate locating groove, 13 initial position arrow, 14 turnplate position locking device, 15 indication arrow, 16 weight indication window, 17 inner shell, 18 center locating member, 19 rotation locking device, 20 weight support frame, 21 hanging members, 22 guide rod, 23 locating guide member, 24 locking block spring, 25 weight plate locking block, 26 position locking plate, 27 locking plate spring, 28 locking pin, 29 locking pin spring, 30 bottom cover, 31 ball rotation frame, 32 weight dial, 33 transparent cover, 34 locking groove, 35 straight pin portion, 36 base locating groove, 37 locking head, 38 locking portion, 39 position notch.DETAILED DESCRIPTION OF EMBODIMENTS

[0024] FIGS. 1 to 9 illustrate detailed description of embodiments for the weight-adjustable kettlebell of the present invention, it includes a housing, a handle 1 attached to the housing, a plurality of weight plates 3, and a base 7, wherein the housing includes an inner shell 17, an outer shell 2, and a weight support frame 20, wherein the weight support frame 20 is integrally attached to the inner and outer shells 17 and 2, the weight support frame 20 has an inverted U-shaped structure, and hanging members 21 corresponding in quantity to the weight plates 3 are symmetrically arranged on arms at both sides of the weight support frame 20; the weight plates 3 are located and stacked in the arrangement sequence and cannot rotate relative to each other; the weight plates 3 are provided with arc-shaped engagement ridges 11 corresponding to the hanging members 21, the arc-shaped engagement ridges 11 on the weight plates 3 are progressively shortened from top to bottom, forming weight adjustment positions; each position corresponds to one plate, with a total of six weight plates 3 and a neutral position, each plate weighs 3 kg, with totally seven weight adjustment positions; the base 7 is provided with a base locating groove 36, and the center positioning seat 5 is installed to the base 7 through the base locating groove 36 to ensure a unique installation position for the center positioning seat 5; a turnplate 6 is arranged between the base 7 and the center positioning seat 5, the center positioning seat 5 is located in the central position of the turnplate 6, the turnplate 6 is rotatably arranged on the base 7 through a ball rotation frame 31, the weight plates 3 are located and arranged on the center positioning seat 5, and the housing is located and arranged on the turnplate 6 and encloses the weight plates 3. When the handle 1 drives the housing to rotate, the hanging members 21 on the weight support frame 20 slide beneath the arc-shaped engagement ridges 11 of the corresponding weight plate 3 to achieve weight adjustment.

[0025] To ensure stable and reliable weight adjustment and prevent rotation of the weight plates 3, a rotation locking device 19 for the weight plates is arranged in the housing, the rotation locking device 19 includes a guide rod 22 slidably arranged on the housing, a weight plate locking block 25 fixedly connected with the top of the guide rod 22, and a locking block spring 24 for applying elastic force to the weight plate locking block 25, the uppermost weight plate 3 is provided with anti-rotation locating grooves 10 which engage with the weight plate locking block 25, the number of the anti-rotation locating grooves 10 corresponds to the number of weight adjustment positions, with totally seven anti-rotation locating grooves 10; when the housing is arranged on the turnplate 6, the guide rod 22 is pressed against the turnplate 6, the weight plate locking block 25 moves upward under the action of the guide rod 22 and disengages from the corresponding anti-rotation locating groove 10 to achieve unlocking, allowing the housing to rotate relative to the weight plates 3 for weight adjustment; when the handle 1 is lifted, the guide rod 22 disengages from the turnplate 6, the weight locking block 25 engages with the corresponding anti-rotation locating groove 10 under the action of the locking block spring 24 to achieve locking, so that the weight plate 3 cannot rotate relative to the housing.

[0026] To achieve position adjustment and prevent misalignment during the position adjustment, the turnplate 6 is fixedly provided with a bottom cover 30, and a turnplate position locking device 14 is arranged between the turnplate 6 and the bottom cover 30; the turnplate position locking device 14 includes a position locking plate 26, a locking plate spring 27, a locking pin 28 and a locking pin spring 29, the center positioning seat 5 is provided with position notches 39 matching the weight adjustment positions, and the position locking plate 26 is provided with locking grooves 34 and locking heads 37 engaging with the position notches 39 to achieve locking; the locking pin 28 is provided with a straight pin portion 35 movable relative to the locking groove 34 at the upper part, and a an immobilized locking portion 38 matching the locking groove 34 at the lower part; the position locking plate 26 is horizontally arranged on the turnplate 6 through the locking plate spring 27, the locking pin 28 is arranged in the locking groove 34 and longitudinally arranged between the turnplate 6 and the bottom cover 30 through the locking pin spring 29, and the straight pin portion 35 of the locking pin 28 protrudes from the straight pin hole of the turnplate 6 to engage with the housing; when the housing is pressed against the straight pin portion 35, the locking pin 28 moves downward, the straight pin portion 35 engages with the locking groove 34, the locking portion 38 is misaligned with the locking groove 34, the position locking plate 26 can move outward relative to the straight pin portion 35 and release the locking of the turnplate 6, then when the handle 1 is rotated, the position locking plate 26 overcomes the elastic force of the locking plate spring 27 and moves from the previous position notch 39 to the next position notch 39, and the housing and the turnplate 6 rotate synchronously to achieve weight adjustment; when the handle 1 is lifted and the housing disengages from the straight pin portion 35, the locking pin 28 is propelled upward under the action of elastic force of the locking pin spring 29, the locking portion 38 engages with the locking groove 34, so that the position locking plate 26 is immobilized, and the locking head 37 engages with the position notch 39 to lock the turnplate 6, thereby ensuring position adjustment without misalignment.

[0027] To ensure stable stacking of the engaging weight plates 3, the weight support frame 20 is fixedly provided with a center locating member 18, the weight plate 3 is provided with a center locating groove 9 at the upper part and a weight plate locating block at the bottom, the center positioning seat 5 is provided with weight plate locating grooves 12, the center locating member 18 on the weight support frame 20 rotatably engages with the center locating groove 9 of the topmost weight plate 3, the weight plate locating block of the bottommost weight plate 3 engages with the weight plate locating groove 12 on the center positioning seat 5, and the weight plates 3 engage with the center locating groove 9 through the weight plate locating blocks to achieve locating; the weight plate locating block and center locating groove 9 of each weight plate 3 have different engagement angles, stacking is only permitted when the weight plates 3 are arranged in the correct sequence, and stacking is impossible if the sequence is not followed.

[0028] To ensure locating between the housing and the turnplate 6, the turnplate 6 is provided with a housing locating seat 8, the housing is provided with a locating guide member 23 located with the housing locating seat 8, and the housing can only be inserted in a single position to guarantee accurate locating with the turnplate 6. The center positioning seat 5 is provided with an initial position arrow 13 and locating arrows, the weight plates 3 are provided with weight plate locating arrows and numerals 4 engaging with the locating arrows on the center positioning seat 5, and the numerals on the weight plates 3 are arranged sequentially from top to bottom.

[0029] To enable intuitive weight reading, the base 7 is provided with a weight indication window 16 synchronized with the weight adjustment position angle, and the turnplate 6 is provided with an indication arrow 15 engaging with the weight indication window 16 to indicate the weight. A weight dial 32 and a transparent cover 33 for enclosing the weight dial 32 are installed on the weight indication window 16.

[0030] The working principle of the present invention is as follows: in an initial state, the initial position arrow 13 on the center positioning seat 5 and the indication arrow 15 that indicates the weight on the turnplate 6 align with the weight indication window 16; the weight plates 3 stacked together in the arrangement sequence are placed on the center positioning seat 5, and the weight plate locating arrows and the numeral 4 align with the locating arrows on the center positioning seat 5; the housing is arranged on the turnplate 6 through by engaging with the housing locating seat 8 through the locating guide member 23, as shown in FIGS. 1 and 8, the weight adjustment is in a neutral position, none of the hanging members 21 engage with the corresponding arc-shaped engagement ridges 11, and the weight indication arrow 15 aligns with the weight indication window 1 with a neutral-position weight of 2 kg, which is the combined weight of the handle 1 and the housing. At this time, the guide rod 22 is pressed against the turnplate 6; after overcoming the elastic force of the locking block spring 24, the guide rod 22 drives the weight plate locking block 2 to move upward, the weight plate locking block 25 disengages from the anti-rotation locating groove 10 in the neutral position, the rotation locking device 19 is in an unlocked state, and the housing can rotate relative to the weight plate 3 for weight adjustment. Simultaneously, the housing is pressed against the straight pin portion 35 of the locking pin 28, the locking pin 28 overcomes the elastic force of the locking pin spring 29 before moving downward, the locking portion 38 disengages from the locking groove 34, the straight pin portion 35 engages with the locking groove 34, the locking portion 38 and the locking groove 34 are misaligned, the turnplate position locking device 14 is in an unlocked state, and the locking head 37 of the position locking plate 26 engages with the position notch 39 in the neutral position; when the turnplate 6 is rotated, the position locking plate 26 overcomes the elastic force of the locking plate spring 27 before being capable of moving outward relative to the straight pin portion 35 to achieve position adjustment.

[0031] The kettlebell weight is adjusted as follows: when the handle 1 is rotated by one-position angle, the handle 1 drives the hanging members 21 on the weight support frame 20 to rotate through the housing, the hanging members 21 in the first position slide beneath the arc-shaped engagement ridges 11 of the weight plate 3 in the first position to achieve weight adjustment, hanging members 21 in other positions and arc-shaped engagement ridges 11 in other positions are still in a disengaged state, and at this time, the indication arrow 15 that indicates the weight aligns with the weight indication window 1 with a weight of 5 kg in the first position, the weight plate locking block 25 corresponds to the anti-rotation locating groove 10 in the first position, and the locking head 37 of the position locking plate 26 slides from the position notch 39 in the neutral position into the position notch 39 in the first position; weight adjustment from the second position to the sixth position can be achieved by continuing to rotate the handle 1 according to the above-mentioned steps, and this process will not be reiterated here; as shown in FIG. 9, the weight adjustment is in the sixth position, all the hanging members 21 engage with the corresponding arc-shaped engagement ridges 11, and the indication arrow 15 that indicates the weight aligns with the weight indication window 1 with a weight of 20 kg in the sixth position.

[0032] Upon completion of kettlebell weight adjustment, when the handle 1 is lifted, the guide rod 22 disengages from the turnplate 6, the weight plate locking block 25 automatically engages with the corresponding anti-rotation locating groove 10 under the action of elastic force of the locking block spring 24 to lock the weight plate 3, the weight plate 3 cannot rotate relative to the housing, thereby ensuring reliable connection between the weight plate 3 and the housing during training with the kettlebell. Simultaneously, the housing disengages from the base 7, the locking pin 28 is propelled upward under the action of the elastic force of the locking pin spring 29, the locking portion 38 engages with the locking groove 34, so that the position locking plate 26 is immobilized, the locking head 37 of the position locking plate 26 is locked to the position notch 39 in a position corresponding to the center positioning seat 5, thereby locking the turnplate 6 and ensuring synchronization between position indication and weight adjustment.

[0033] The above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention in any form, and any simple changes, equivalent variations, or modifications made without departing from the technical solutions of the present invention shall fall into the protection scope of the present invention.

Examples

Embodiment Construction

[0024]FIGS. 1 to 9 illustrate detailed description of embodiments for the weight-adjustable kettlebell of the present invention, it includes a housing, a handle 1 attached to the housing, a plurality of weight plates 3, and a base 7, wherein the housing includes an inner shell 17, an outer shell 2, and a weight support frame 20, wherein the weight support frame 20 is integrally attached to the inner and outer shells 17 and 2, the weight support frame 20 has an inverted U-shaped structure, and hanging members 21 corresponding in quantity to the weight plates 3 are symmetrically arranged on arms at both sides of the weight support frame 20; the weight plates 3 are located and stacked in the arrangement sequence and cannot rotate relative to each other; the weight plates 3 are provided with arc-shaped engagement ridges 11 corresponding to the hanging members 21, the arc-shaped engagement ridges 11 on the weight plates 3 are progressively shortened from top to bottom, forming weight adj...

TECHNICAL FIELD

[0001] The present invention relates to the technical field of sports and fitness equipment, particularly to a weight-adjustable kettlebell capable of adjusting the kettlebell weight through handle rotation.BACKGROUND

[0002] Kettlebells are a common type of fitness equipment used in strength and compound training. During training, the handle is typically gripped with both hands and swung in dynamic motions, so that more muscle groups can be trained to promote healthy and coordinated development of all body parts. Conventional kettlebells are integrally molded and unchangeable in weight. To accommodate different training intensities and requirements, a set of kettlebells with varying weights is required, which is more suitable for purchasing as a complete set to be used in commercial gyms, while home users rarely buy complete sets.

[0003] To address the problems of the traditional kettlebells with fixed and non-adjustable weights and the need for purchasing as a complete set, Chinese Patent Publication No. CN217246498U discloses a weight-adjustable kettlebell. This structure allows users to obtain variable kettlebell weights by simply inserting pins into different positions to adjust the number of internal weight plates. A single kettlebell can replace a set of traditional kettlebells, facilitating more cost-effective, convenient, space-saving uses both in commercial gyms and at home, so that the above-mentioned problems existing in the traditional kettlebells are effectively addressed. However, this structure still has the following shortcomings during use: firstly, each weight block requires installation of limiting components used with pins, resulting in too complex weight block structures, inconvenient production and installation, as well as the risk of failure of the limiting components; secondly, due to the absence of a base for the weight blocks, the weight blocks are prone to misalignment during weight adjustment, resulting in failure to arrange the weight blocks neatly; thirdly, an excessive clearance between weight blocks can generate mechanical collision noise during training; further improvements are required.SUMMARY

[0004] To address the above-mentioned problems existing in the prior art, the objective of the present invention is to provide an weight-adjustable kettlebell featuring rational structural design, simple and convenient weight adjustment by rotation, safe and reliable use, small fit clearance, and excellent stability.

[0005] A technical solution adopted by the present invention to address the above-mentioned technical problems includes a housing, a handle attached to the housing, a plurality of weight plates, and a base, wherein the housing includes an inner shell, an outer shell and a weight support frame fixedly connected with the inner and outer shells, and the weight support frame is provided with hanging members corresponding to the weight plates; the weight plates are located and stacked in an arrangement sequence, each weight plate is provided with an arc-shaped engagement ridges corresponding to the hanging members, and the arc-shaped engagement ridges on the weight plates are progressively shortened from top to bottom, forming weight adjustment positions; the base is provided with a center positioning seat, a turnplate is arranged between the base and the center positioning seat, the weight plates are located on the center positioning seat, and the housing is located on the turnplate and encloses the weight plates; when the handle drives the housing to rotate, the hanging members on the weight support frame slide beneath the arc-shaped engagement ridges of the corresponding weight plates to achieve weight adjustment.

[0006] In a further embodiment of the present invention, a rotation locking device for the weight plates is arranged in the housing, the rotation locking device includes a guide rod slidably arranged on the housing, a weight plate locking block fixedly connected with the top of the guide rod, and a locking block spring for applying elastic force to the weight plate locking block, the uppermost weight plate is provided with anti-rotation locating grooves which engage with the weight plate locking block, and the number of the anti-rotation locating grooves corresponds to the number of weight adjustment positions; when the housing is arranged on the turnplate, the guide rod is pressed against the turnplate, the weight plate locking block disengages from the corresponding anti-rotation locating groove under the action of the guide rod to achieve unlocking, allowing the housing to rotate relative to the weight plates for weight adjustment; when the handle is lifted, the guide rod disengages from the turnplate, the weight locking block engages with the corresponding anti-rotation locating groove under the action of the locking block spring to achieve locking, so that the weight plate cannot rotate relative to the housing.

[0007] In a further embodiment of the present invention, the turnplate is fixedly provided with a bottom cover, and a turnplate position locking device is arranged between the turnplate and the bottom cover; the turnplate position locking device includes a position locking plate, a locking plate spring, a locking pin and a locking pin spring, the center positioning seat is provided with position notches matching the weight adjustment positions, and the position locking plate is provided with locking grooves and locking heads engaging with the position notches to achieve locking; the locking pin is provided with a straight pin portion movable relative to the locking groove at the upper part, and an immobilized locking portion matching the locking groove at the lower part; the position locking plate is horizontally arranged on the turnplate through the locking plate spring, the locking pin is arranged in the locking groove and longitudinally arranged between the turnplate and the bottom cover through the locking pin spring, and the straight pin portion of the locking pin protrudes from the straight pin hole of the turnplate to engage with the housing; when the housing is pressed against the straight pin portion, the locking pin moves downward, so that the position locking plate can move outward relative to the straight pin portion and release the locking of the turnplate, then when the handle is rotated, the position locking plate overcomes the elastic force of the locking plate spring and moves from the previous position notch to the next position notch, and the housing and the turnplate rotate synchronously to achieve weight adjustment; when the housing disengages from the straight pin portion, the locking pin is propelled upward under the action of elastic force of the locking pin spring, the locking portion engages with the locking groove, so that the position locking plate is immobilized, and the locking head engages with the position notch to lock the turnplate.

[0008] In a further embodiment of the present invention, the weight support frame is fixedly provided with a center locating member, the weight plate is provided with a center locating groove at the upper part and a weight plate locating block at the bottom, the center positioning seat is provided with weight plate locating grooves, the center locating member on the weight support frame rotatably engages with the center locating groove of the topmost weight plate, the weight plate locating block of the bottommost weight plate engages with the weight plate locating groove on the center positioning seat to achieve locating, and the weight plates engage with the center locating groove through the weight plate locating blocks to achieve locating.

[0009] In a further embodiment of the present invention, the turnplate is provided with a housing locating seat, and the housing is provided with a locating guide member that engages with the housing locating seat to achieve locating.

[0010] In a further embodiment of the present invention, the center positioning seat is provided with an initial position arrow, and the weight plates are provided with weight plate locating arrows and numerals.

[0011] In a further embodiment of the present invention, the base is provided with a weight indication window synchronized with the weight adjustment position angle, and the turnplate is provided with an indication arrow engaging with the window to indicate the weight.

[0012] In a further embodiment of the present invention, a weight dial and a transparent cover for enclosing the weight dial are installed on the weight indication window.

[0013] Compared with the prior art, the structure adopted has the following advantages and effects: firstly, when the kettlebell is in a static placement state, the weight of the kettlebell can be adjusted in the position sequence by simply rotating the handle to achieve simple and convenient weight adjustment. Secondly, during kettlebell weight adjustment, the corresponding hanging members on the weight support frame engage with the arc-shaped engagement ridges of the corresponding weight plates, and at least two sets of hanging members engage with the corresponding arc-shaped engagement ridges to hold the weight plates, with a small engagement clearance, compact engagement of weight plates, stable and reliable connection, and minimal wobble. Thirdly, upon completion of weight adjustment, the weight plate is automatically locked to the housing through rotation of the locking device, so that the weight plate cannot rotate relative to the housing, this ensures zero plate detachment during training, thus guaranteeing kettlebell safety in use. Fourthly, the weight plate can rotate freely through the turnplate position locking device during weight adjustment, and the turnplate is locked to the center positioning seat automatically when the handle is lifted to guarantee synchronization between position indication and weight adjustment.BRIEF DESCRIPTION OF DRAWINGS

[0014] FIG. 1 is an exploded structure view of the present invention.

[0015] FIG. 2 is a bottom structure view of the handle assembly of the present invention.

[0016] FIG. 3 is a spatial structure view of the handle assembly of the present invention.

[0017] FIG. 4 is an exploded structure view of the handle assembly of the present invention.

[0018] FIG. 5 is an exploded structure view of the base assembly of the present invention.

[0019] FIG. 6 is a front view structure view of the present invention.

[0020] FIG. 7 is a structure view of the section A-A of the present invention.

[0021] FIG. 8 is a structure view of the section B-B engagement structure without mounted plates of the present invention.

[0022] FIG. 9 is a structure view of the section B-B engagement structure with all mounted plates of the present invention.

[0023] In the figures: 1 handle, 2 outer shell, 3 weight plate, 4 weight plate locating arrow and numeral, 5 center positioning seat, 6 turnplate, 7 base, 8 housing locating seat, 9 center locating groove, 10 anti-rotation locating groove, 11 arc-shaped engagement ridges, 12 weight plate locating groove, 13 initial position arrow, 14 turnplate position locking device, 15 indication arrow, 16 weight indication window, 17 inner shell, 18 center locating member, 19 rotation locking device, 20 weight support frame, 21 hanging members, 22 guide rod, 23 locating guide member, 24 locking block spring, 25 weight plate locking block, 26 position locking plate, 27 locking plate spring, 28 locking pin, 29 locking pin spring, 30 bottom cover, 31 ball rotation frame, 32 weight dial, 33 transparent cover, 34 locking groove, 35 straight pin portion, 36 base locating groove, 37 locking head, 38 locking portion, 39 position notch.DETAILED DESCRIPTION OF EMBODIMENTS

[0024] FIGS. 1 to 9 illustrate detailed description of embodiments for the weight-adjustable kettlebell of the present invention, it includes a housing, a handle 1 attached to the housing, a plurality of weight plates 3, and a base 7, wherein the housing includes an inner shell 17, an outer shell 2, and a weight support frame 20, wherein the weight support frame 20 is integrally attached to the inner and outer shells 17 and 2, the weight support frame 20 has an inverted U-shaped structure, and hanging members 21 corresponding in quantity to the weight plates 3 are symmetrically arranged on arms at both sides of the weight support frame 20; the weight plates 3 are located and stacked in the arrangement sequence and cannot rotate relative to each other; the weight plates 3 are provided with arc-shaped engagement ridges 11 corresponding to the hanging members 21, the arc-shaped engagement ridges 11 on the weight plates 3 are progressively shortened from top to bottom, forming weight adjustment positions; each position corresponds to one plate, with a total of six weight plates 3 and a neutral position, each plate weighs 3 kg, with totally seven weight adjustment positions; the base 7 is provided with a base locating groove 36, and the center positioning seat 5 is installed to the base 7 through the base locating groove 36 to ensure a unique installation position for the center positioning seat 5; a turnplate 6 is arranged between the base 7 and the center positioning seat 5, the center positioning seat 5 is located in the central position of the turnplate 6, the turnplate 6 is rotatably arranged on the base 7 through a ball rotation frame 31, the weight plates 3 are located and arranged on the center positioning seat 5, and the housing is located and arranged on the turnplate 6 and encloses the weight plates 3. When the handle 1 drives the housing to rotate, the hanging members 21 on the weight support frame 20 slide beneath the arc-shaped engagement ridges 11 of the corresponding weight plate 3 to achieve weight adjustment.

[0025] To ensure stable and reliable weight adjustment and prevent rotation of the weight plates 3, a rotation locking device 19 for the weight plates is arranged in the housing, the rotation locking device 19 includes a guide rod 22 slidably arranged on the housing, a weight plate locking block 25 fixedly connected with the top of the guide rod 22, and a locking block spring 24 for applying elastic force to the weight plate locking block 25, the uppermost weight plate 3 is provided with anti-rotation locating grooves 10 which engage with the weight plate locking block 25, the number of the anti-rotation locating grooves 10 corresponds to the number of weight adjustment positions, with totally seven anti-rotation locating grooves 10; when the housing is arranged on the turnplate 6, the guide rod 22 is pressed against the turnplate 6, the weight plate locking block 25 moves upward under the action of the guide rod 22 and disengages from the corresponding anti-rotation locating groove 10 to achieve unlocking, allowing the housing to rotate relative to the weight plates 3 for weight adjustment; when the handle 1 is lifted, the guide rod 22 disengages from the turnplate 6, the weight locking block 25 engages with the corresponding anti-rotation locating groove 10 under the action of the locking block spring 24 to achieve locking, so that the weight plate 3 cannot rotate relative to the housing.

[0026] To achieve position adjustment and prevent misalignment during the position adjustment, the turnplate 6 is fixedly provided with a bottom cover 30, and a turnplate position locking device 14 is arranged between the turnplate 6 and the bottom cover 30; the turnplate position locking device 14 includes a position locking plate 26, a locking plate spring 27, a locking pin 28 and a locking pin spring 29, the center positioning seat 5 is provided with position notches 39 matching the weight adjustment positions, and the position locking plate 26 is provided with locking grooves 34 and locking heads 37 engaging with the position notches 39 to achieve locking; the locking pin 28 is provided with a straight pin portion 35 movable relative to the locking groove 34 at the upper part, and a an immobilized locking portion 38 matching the locking groove 34 at the lower part; the position locking plate 26 is horizontally arranged on the turnplate 6 through the locking plate spring 27, the locking pin 28 is arranged in the locking groove 34 and longitudinally arranged between the turnplate 6 and the bottom cover 30 through the locking pin spring 29, and the straight pin portion 35 of the locking pin 28 protrudes from the straight pin hole of the turnplate 6 to engage with the housing; when the housing is pressed against the straight pin portion 35, the locking pin 28 moves downward, the straight pin portion 35 engages with the locking groove 34, the locking portion 38 is misaligned with the locking groove 34, the position locking plate 26 can move outward relative to the straight pin portion 35 and release the locking of the turnplate 6, then when the handle 1 is rotated, the position locking plate 26 overcomes the elastic force of the locking plate spring 27 and moves from the previous position notch 39 to the next position notch 39, and the housing and the turnplate 6 rotate synchronously to achieve weight adjustment; when the handle 1 is lifted and the housing disengages from the straight pin portion 35, the locking pin 28 is propelled upward under the action of elastic force of the locking pin spring 29, the locking portion 38 engages with the locking groove 34, so that the position locking plate 26 is immobilized, and the locking head 37 engages with the position notch 39 to lock the turnplate 6, thereby ensuring position adjustment without misalignment.

[0027] To ensure stable stacking of the engaging weight plates 3, the weight support frame 20 is fixedly provided with a center locating member 18, the weight plate 3 is provided with a center locating groove 9 at the upper part and a weight plate locating block at the bottom, the center positioning seat 5 is provided with weight plate locating grooves 12, the center locating member 18 on the weight support frame 20 rotatably engages with the center locating groove 9 of the topmost weight plate 3, the weight plate locating block of the bottommost weight plate 3 engages with the weight plate locating groove 12 on the center positioning seat 5, and the weight plates 3 engage with the center locating groove 9 through the weight plate locating blocks to achieve locating; the weight plate locating block and center locating groove 9 of each weight plate 3 have different engagement angles, stacking is only permitted when the weight plates 3 are arranged in the correct sequence, and stacking is impossible if the sequence is not followed.

[0028] To ensure locating between the housing and the turnplate 6, the turnplate 6 is provided with a housing locating seat 8, the housing is provided with a locating guide member 23 located with the housing locating seat 8, and the housing can only be inserted in a single position to guarantee accurate locating with the turnplate 6. The center positioning seat 5 is provided with an initial position arrow 13 and locating arrows, the weight plates 3 are provided with weight plate locating arrows and numerals 4 engaging with the locating arrows on the center positioning seat 5, and the numerals on the weight plates 3 are arranged sequentially from top to bottom.

[0029] To enable intuitive weight reading, the base 7 is provided with a weight indication window 16 synchronized with the weight adjustment position angle, and the turnplate 6 is provided with an indication arrow 15 engaging with the weight indication window 16 to indicate the weight. A weight dial 32 and a transparent cover 33 for enclosing the weight dial 32 are installed on the weight indication window 16.

[0030] The working principle of the present invention is as follows: in an initial state, the initial position arrow 13 on the center positioning seat 5 and the indication arrow 15 that indicates the weight on the turnplate 6 align with the weight indication window 16; the weight plates 3 stacked together in the arrangement sequence are placed on the center positioning seat 5, and the weight plate locating arrows and the numeral 4 align with the locating arrows on the center positioning seat 5; the housing is arranged on the turnplate 6 through by engaging with the housing locating seat 8 through the locating guide member 23, as shown in FIGS. 1 and 8, the weight adjustment is in a neutral position, none of the hanging members 21 engage with the corresponding arc-shaped engagement ridges 11, and the weight indication arrow 15 aligns with the weight indication window 1 with a neutral-position weight of 2 kg, which is the combined weight of the handle 1 and the housing. At this time, the guide rod 22 is pressed against the turnplate 6; after overcoming the elastic force of the locking block spring 24, the guide rod 22 drives the weight plate locking block 2 to move upward, the weight plate locking block 25 disengages from the anti-rotation locating groove 10 in the neutral position, the rotation locking device 19 is in an unlocked state, and the housing can rotate relative to the weight plate 3 for weight adjustment. Simultaneously, the housing is pressed against the straight pin portion 35 of the locking pin 28, the locking pin 28 overcomes the elastic force of the locking pin spring 29 before moving downward, the locking portion 38 disengages from the locking groove 34, the straight pin portion 35 engages with the locking groove 34, the locking portion 38 and the locking groove 34 are misaligned, the turnplate position locking device 14 is in an unlocked state, and the locking head 37 of the position locking plate 26 engages with the position notch 39 in the neutral position; when the turnplate 6 is rotated, the position locking plate 26 overcomes the elastic force of the locking plate spring 27 before being capable of moving outward relative to the straight pin portion 35 to achieve position adjustment.

[0031] The kettlebell weight is adjusted as follows: when the handle 1 is rotated by one-position angle, the handle 1 drives the hanging members 21 on the weight support frame 20 to rotate through the housing, the hanging members 21 in the first position slide beneath the arc-shaped engagement ridges 11 of the weight plate 3 in the first position to achieve weight adjustment, hanging members 21 in other positions and arc-shaped engagement ridges 11 in other positions are still in a disengaged state, and at this time, the indication arrow 15 that indicates the weight aligns with the weight indication window 1 with a weight of 5 kg in the first position, the weight plate locking block 25 corresponds to the anti-rotation locating groove 10 in the first position, and the locking head 37 of the position locking plate 26 slides from the position notch 39 in the neutral position into the position notch 39 in the first position; weight adjustment from the second position to the sixth position can be achieved by continuing to rotate the handle 1 according to the above-mentioned steps, and this process will not be reiterated here; as shown in FIG. 9, the weight adjustment is in the sixth position, all the hanging members 21 engage with the corresponding arc-shaped engagement ridges 11, and the indication arrow 15 that indicates the weight aligns with the weight indication window 1 with a weight of 20 kg in the sixth position.

[0032] Upon completion of kettlebell weight adjustment, when the handle 1 is lifted, the guide rod 22 disengages from the turnplate 6, the weight plate locking block 25 automatically engages with the corresponding anti-rotation locating groove 10 under the action of elastic force of the locking block spring 24 to lock the weight plate 3, the weight plate 3 cannot rotate relative to the housing, thereby ensuring reliable connection between the weight plate 3 and the housing during training with the kettlebell. Simultaneously, the housing disengages from the base 7, the locking pin 28 is propelled upward under the action of the elastic force of the locking pin spring 29, the locking portion 38 engages with the locking groove 34, so that the position locking plate 26 is immobilized, the locking head 37 of the position locking plate 26 is locked to the position notch 39 in a position corresponding to the center positioning seat 5, thereby locking the turnplate 6 and ensuring synchronization between position indication and weight adjustment.

[0033] The above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention in any form, and any simple changes, equivalent variations, or modifications made without departing from the technical solutions of the present invention shall fall into the protection scope of the present invention.

Examples

Embodiment Construction

[0024]FIGS. 1 to 9 illustrate detailed description of embodiments for the weight-adjustable kettlebell of the present invention, it includes a housing, a handle 1 attached to the housing, a plurality of weight plates 3, and a base 7, wherein the housing includes an inner shell 17, an outer shell 2, and a weight support frame 20, wherein the weight support frame 20 is integrally attached to the inner and outer shells 17 and 2, the weight support frame 20 has an inverted U-shaped structure, and hanging members 21 corresponding in quantity to the weight plates 3 are symmetrically arranged on arms at both sides of the weight support frame 20; the weight plates 3 are located and stacked in the arrangement sequence and cannot rotate relative to each other; the weight plates 3 are provided with arc-shaped engagement ridges 11 corresponding to the hanging members 21, the arc-shaped engagement ridges 11 on the weight plates 3 are progressively shortened from top to bottom, forming weight adj...

Claims

1. An weight-adjustable kettlebell, comprising a housing, a handle (1) attached to the housing, a plurality of weight plates (3), and a base (7), wherein the housing comprises an inner shell (17), an outer shell (2) and a weight support frame (20), the weight support frame (20) has an inverted U-shaped structure and fixedly connected with the inner shell (17) and the outer shell (2), and hanging members (21) corresponding in quantity to the weight plates (3) are symmetrically arranged on arms at both sides of the weight support frame (20); the weight plates (3) are located and stacked in an arrangement sequence, the outer face of weight plates (3) are provided with arc-shaped engagement ridges (11) corresponding to the hanging members (21), and the arc-shaped engagement ridges (11) on the weight plates (3) are progressively shortened from top to bottom, forming weight adjustment positions; the base (7) is provided with a center positioning seat (5), a turnplate (6) is arranged between the base (7) and the center positioning seat (5), the weight plates (3) are located on the center positioning seat (5), and the housing is located on the turnplate (6) and encloses the weight plates (3); when the handle (1) drives the housing to rotate, the hanging members (21) on the weight support frame (20) slide beneath the arc-shaped engagement ridges (11) of the corresponding weight plates (3) to achieve weight adjustment.

2. The weight-adjustable kettlebell of claim 1, wherein a rotation locking device (19) for the weight plates is arranged in the housing, the rotation locking device (19) comprises a guide rod (22) slidably arranged on the housing, a weight plate locking block (25) fixedly connected with the top of the guide rod (22), and a locking block spring (24) for applying elastic force to the weight plate locking block (25), the uppermost weight plate (3) is provided with anti-rotation locating grooves (10) which engage with the weight plate locking block (25), the number of the anti-rotation locating grooves (10) corresponds to the number of weight adjustment positions; when the housing is arranged on the turnplate (6), the guide rod (22) is pressed against the turnplate (6), the weight plate locking block (25) under the action of the guide rod (22) causes the weight plate locking block (25) to disengage from the corresponding anti-rotation locating groove (10) to achieve unlocking, allowing the housing to rotate relative to the weight plates (3) for weight adjustment; when the handle (1) is lifted, the guide rod (22) disengages from the turnplate (6), the weight locking block (25) engages with the corresponding anti-rotation locating groove (10) under the action of the locking block spring (24) to achieve locking, so that the weight plate (3) cannot rotate relative to the housing.

3. The weight-adjustable kettlebell of claim 1 or 2, wherein the turnplate (6) is fixedly provided with a bottom cover (30), and a turnplate position locking device (14) is arranged between the turnplate (6) and the bottom cover (30); the turnplate position locking device (14) comprises a position locking plate (26), a locking plate spring (27), a locking pin (28) and a locking pin spring (29), the central alignment base (5) is provided with position notches (39) matching the weight adjustment positions, and the position locking plate (26) is provided with locking grooves (34) and locking heads (37) engaging with the position notches (39) to achieve locking;the locking pin (28) is provided with a straight pin portion (35) movable relative to the locking groove (34) at the upper part, and an immobilized locking portion (38) matching the locking groove (34) at the lower part; the position locking plate (26) is horizontally arranged on the turnplate (6) through the locking plate spring (27), the locking pin (28) is arranged in the locking groove (34) and longitudinally arranged between the turnplate (6) and the bottom cover (30) through the locking pin spring (29), and the straight pin portion (35) of the locking pin (28) protrudes from the straight pin hole of the turnplate (6) to engage with the housing;when the housing is pressed against the straight pin portion (35), the locking pin (28) moves downward, the position locking plate (26) can move outward relative to the straight pin portion (35) and release the locking of the turnplate (6), then when the handle (1) is rotated, the position locking plate (26) overcomes the elastic force of the locking plate spring (27) and moves from the previous position notch (39) to the next position notch (39), and the housing and the turnplate (6) rotate synchronously to achieve weight adjustment; when the housing disengages from the straight pin portion (35), the locking pin (28) is propelled upward under the action of the elastic force of the locking pin spring (29), the locking portion (38) engages with the locking groove (34), so that the position locking plate (26) is immobilized, and the locking head (37) engages with the position notch (39) to lock the turnplate (6).

4. The weight-adjustable kettlebell of claim 3, wherein the weight support frame (20) is fixedly provided with a center locating member (18), the weight plate (3) is provided with a center locating groove (9) at the upper part and a weight plate locating block at the bottom, the center positioning seat (5) is provided with weight plate locating grooves (12), the center locating member (18) on the weight support frame (20) rotatably engages with the center locating groove (9) of the topmost weight plate (3), the weight plate locating block of the bottommost weight plate (3) engages with the weight plate locating groove (12) on the center positioning seat (5), and the weight plates (3) engage with the center locating groove (9) through the weight plate locating blocks to achieve locating.

5. The weight-adjustable kettlebell of claim 1, wherein the turnplate (6) is provided with a housing locating seat (8), and the housing is provided with a locating guide member (23) that engages with the housing locating seat (8) to achieve locating.

6. The weight-adjustable kettlebell of claim 5, wherein the center positioning seat (5) is provided with an initial position arrow (13), and the weight plates (3) are provided with weight plate locating arrows and numerals (4).

7. The weight-adjustable kettlebell of claim 4, wherein the base (7) is provided with a weight indication window (16) synchronized with the weight adjustment position angle, and the turnplate (6) is provided with an indication arrow (15) engaging with the weight indication window (16) to indicate the weight.

8. The weight-adjustable kettlebell of claim 7, wherein a weight dial (32) and a transparent cover (33) for enclosing the weight dial (32) are installed on the weight indication window (16).

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