Weight adjusting mechanism of fitness equipment

Abstract

A weight adjusting mechanism of fitness equipment is mainly used in cooperation with a plurality of lever pieces and placed on a base, comprises a holding handle, two balance weight control shells, two fasteners, a plurality of balance weights and two balance weight control adjusting sets, can be used for training of different loads by means of combination with the lever pieces, and can also be used for adjusting the weight of the fitness equipment through the arrangement of the balance weights. A user only needs to rotate and control the two rotating sets to drive the adjusting blocks to rotate, the fasteners are driven to be embedded and clamped relative to the balancing weights by means of the distance differences of the first grooves, the second grooves and the third grooves formed in the adjusting blocks relative to the center points, and the user only needs to rotate the rotating sets according to the needs of the user and then can rotate the adjusting blocks. The weight can be increased or decreased slightly (depending on the weight of each balancing weight, and the weight of each balancing weight can be smaller than or larger than the weight of the lever piece), for a user with small strength, the user only needs to lift the holding handle to be matched with the weight of each balancing weight to carry out weight bearing operation (without the lever piece), and for a user with large strength, the weight bearing operation can be carried out only by lifting the holding handle to be matched with the weight of each balancing weight. In addition to being matched with the installation of the lever piece, the weight of each balancing weight can be added, and the load can be further slightly increased according to requirements, so that the cost of replacing the whole training assembly can be saved, and the training requirements of various loads can be met.

Description

Technical Field

[0001] This invention relates to a weight adjustment mechanism for fitness equipment, specifically a technology applied in the fitness field. It is mainly for adjusting the weight of the barbell grips to provide operation for users with less strength who cannot use the bar plates, or to provide users who do not have enough weight when using the barbell with the bar plates to increase their weight. Background Technology

[0002] Fitness is a type of exercise suitable for men, women, and children of all ages. The proliferation of gyms today gives people more choices for fitness. However, each type of fitness equipment requires appropriate strength to operate. For example, women and children may not be able to operate the equipment properly due to their limited strength. But simply holding the handles is not enough to achieve the desired fitness effect.

[0003] Continuing from the above, for users with greater strength, the weight of barbells, weightlifting weights, kettlebells, etc., is mostly adjusted by combining weight plates. Users can gradually increase or decrease the number of plates to operate a barbell (lifting weight) of appropriate weight. However, most barbells (lifting weights) on the market have a maximum weight limit. For professional athletes who exercise for long periods, if they want to lift heavier weights, they must switch to another set, which is very inconvenient for users. In addition, some users have barbells (lifting weights) at home, so they have to spend a lot of money to buy multiple sets of barbells (lifting weights) of different weights.

[0004] Therefore, whether for users with less or more strength, the appropriate weight of the barbell, or even the ability to make slight adjustments to the weight, is the function that users need. Summary of the Invention

[0005] To address the shortcomings of existing barbells, weightlifting equipment, and kettlebells—which often result in excessive weight for users with lower strength or a fixed total weight for those with higher strength requiring weight-increasing training—and thus necessitate replacing the entire set of equipment at increased cost, this invention provides a weight adjustment mechanism for fitness equipment. When using barbells, weightlifting equipment, kettlebells, and similar equipment, users can not only adjust the weight by adding or removing weight plates, but more importantly, they can also make detailed adjustments to the weight to suit users with varying strength levels for targeted weight training.

[0006] The technical solution adopted by this invention to solve its technical problem is: A weight adjustment mechanism for a fitness device, primarily used in conjunction with several bar plates, includes: a grip handle; two weight control shells, respectively assembled at both ends of the grip handle and mounted on a base, wherein the two weight control shells are movably assembled and disassembled with the several bar plates, and each of the two weight control shells has a partition separating the internal space to form a first receiving chamber and a second receiving chamber, with each first receiving chamber having an opening at its bottom; two fasteners, installed within the two weight control shells and movable according to the slit displacement of each partition, the slits of each partition connecting the first receiving chamber and the second receiving chamber; several springs, one end of which abuts against one end of each fastener, and the other end of each spring abuts against the inner wall of the second receiving chamber; and each fastener having a directional protrusion extending from one end corresponding to its slit, and two first... The system includes an insert and two second inserts; several counterweights, which are evenly and movably disposed within the first receiving chamber of each counterweight control housing, with each counterweight corresponding to a fastener having a recessed locking groove. The movable displacement of each fastener is achieved by each first insert and each second insert engaging with its corresponding locking groove; two counterweight control adjustment groups, which are respectively installed in the frames within the first receiving chamber of each counterweight control housing. Each counterweight is equally distributed on both sides of each frame. Each counterweight control adjustment group includes a rotating assembly, a shaft, and an adjustment block. Each rotating assembly is located at the top of the outer periphery of each counterweight control housing. Each shaft is connected to the rotating assembly at one end, and the other end of each shaft passes through the first receiving chamber of each counterweight control housing. The internal components pass through each frame and connect with each adjusting block. Each adjusting block corresponds to the control protrusion of each fastener. A first groove, a second groove, and a third groove are respectively recessed on the periphery of each adjusting block. The distance from the center point of each adjusting block to the first groove is defined as the first distance, the distance from the center point to the second groove is defined as the second distance, and the distance from the center point to the third groove is defined as the third distance, with the first distance > the second distance > the third distance. When each adjusting block rotates, causing the control protrusion of each fastener to engage in the first groove, each adjusting block pushes each fastener away from each counterweight. At this time, each counterweight is not engaged with each fastener, and the handle is lifted to enter the release mode. When each adjusting block rotates... When the control protrusions of each fastener engage with the second groove, each spring elastically pushes each fastener toward each counterweight, and each first insert engages with the corresponding counterweight's locking groove. At this time, lifting the handle causes some counterweights to move, thus forming the first load-bearing mode, while the other part of the counterweights detaches from the first receiving chamber from each opening and remains on the base. Finally, when each adjusting block rotates, causing the control protrusions of each fastener to engage with the third groove, the elasticity of each spring is fully released, pushing each fastener toward each counterweight again, and each first insert and each second insert engages with the corresponding counterweight's locking groove. At this time, lifting the handle causes all counterweights to move, thus forming the second load-bearing mode.

[0007] The beneficial effects of this invention are that, in addition to achieving different load training through combinations with various bar plates, the user only needs to rotate the two rotating groups to drive the adjustment blocks to rotate through the setting of each weight block. The difference in distance between the first, second, and third grooves on each adjustment block and the center point causes each fastener to engage with each weight block. The user can increase or decrease the weight slightly by rotating the rotating group according to their own needs (depending on the weight of each weight block, which can be less than or greater than the weight of the bar plate). For users with less strength, they only need to lift the handle and use the weight of each weight block to perform the load operation (excluding the bar plate). For users with more strength, in addition to installing the bar plate, they can also add the weight of each weight block to further increase the load slightly according to their needs. This eliminates the cost of replacing the entire training component and thus achieves various load training needs. Attached Figure Description

[0008] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0009] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0010] Figure 2 This is a three-dimensional schematic diagram of the invention from another perspective.

[0011] Figure 3 This is a three-dimensional schematic diagram of the present invention placed on the base.

[0012] Figure 4 for Figure 3 A schematic diagram of its breakdown.

[0013] Figure 5 for Figure 1 Schematic diagram of local decomposition.

[0014] Figure 6 This is a planar schematic diagram of the adjustment block of the present invention.

[0015] Figure 7 for Figure 1 The diagram shows a cross-sectional view of line segment VII-VII.

[0016] Figure 8 for Figure 7 The diagram shows a cross-sectional view of line segment VIII-VIII.

[0017] Figure 9 for Figure 1 The diagram shows a cross-sectional view of line segment IX-IX.

[0018] Figure 10 for Figure 7A schematic diagram showing how, after rotating the rotating assembly and the control convex block jumps, each of the first inserts of the fastener inserts into the corresponding counterweight block's latching groove.

[0019] Figure 11A for Figure 8 A schematic diagram showing how, after rotating the rotating assembly and the control convex block jumps, each of the first inserts of the fastener inserts into the corresponding counterweight block's latching groove.

[0020] Figure 11B for Figure 9 A diagram illustrating the action of lifting upwards, causing part of the counterweight to be moved away from the base.

[0021] Figure 12 for Figure 10 A schematic diagram showing the insertion of each first and second insert of the fastener into the corresponding counterweight's latching slot after the control convex block jumps around again.

[0022] Figure 13 for Figure 11A A schematic diagram showing the insertion of each first and second insert of the fastener into the corresponding counterweight's latching slot after the control convex block jumps around again.

[0023] Figure 14 This is a schematic diagram of the upward rotation adjustment action of the rotating assembly of the present invention.

[0024] Figure 15 for Figure 14 A schematic diagram of the cross-section of the XV-XV line segment.

[0025] Figure 16 for Figure 14 A schematic diagram of the cross-section of the XVI-XVI line segment.

[0026] Explanation of the labels in the diagram: 100 bar plates Base 200 Placement slot 201 Handle 1 Counterweight control shell 2 First Storage Room 21 Frame 211 Opening 212 Second storage room 22 Platform 23 Chip Block 231 Front bezel 24 Front frame 25 Back frame 26 Rear bumper 27 partition 3 Section 31 Column rib 32 Ball 33 Fastener 4 Spring 41 Control bump 42 First insert 43 Second insert 44 Positioning groove 45 Rib 451 Counterweight 5 Clip slot 51 Counterweight control adjustment group 6 Rotary group 61 Knob 611 Reset spring 612 Limit screw 613 Mounting hole 614 Anti-slip 615 Counterweight marking diagram 616 Axis 62 Limiting groove 621 Locking slot 622 Adjustment block 63 First slot 631 Second slot 632 Third slot 633 Fixing screw 64 Center point P First distance A Second distance B Third distance C Detailed Implementation

[0027] Please see Figures 1 to 16As shown, the present invention discloses a weight adjustment mechanism for a fitness device, which is mainly used in conjunction with several bar plates 100 and placed on a base 200. It includes: a cylindrical grip handle 1; two counterweight control shells 2, respectively assembled at both ends of the grip handle 1 and movably mounted on the base 200; the two counterweight control shells 2 being movably assembled and disassembled from the several bar plates 100; partitions 3 within each of the two counterweight control shells 2 dividing the internal space into a first receiving chamber 21 and a second receiving chamber 22; and each first receiving chamber 21 having an opening 212 at its bottom; and two fasteners 4, installed within the two counterweight control shells 2 and movable through the slits 31 of each partition 3. The slits 31 are horizontally opened on the partitions 3, and the slits 31 of each partition 3 connect to the first receiving chambers. 21 and the second receiving chamber 22 are further provided with several springs 41, one end of which abuts against one end of each fastener 4, and the other end of each spring 41 abuts against the inner wall of the second receiving chamber 22. Each spring 41 elastically drives each fastener 4 to move at the corresponding cutout 31. Each fastener 4 has a control protrusion 42, two first inserts 43 and two second inserts 44 extending from one end corresponding to the cutout 31. The two first inserts 43 are located on the left and right sides of the control protrusion 42, and the two second inserts 44 are close to the edge of each fastener 4. Several counterweights 5 are evenly and movably arranged in the first receiving chamber 21 of each counterweight control shell 2. Furthermore, each counterweight 5 is recessed to form a snap-fit ​​groove 51 corresponding to the position of each fastener 4. The movable displacement of each fastener 4 is respectively engaged into the corresponding snap-fit ​​groove 51 by each first insert 43 and each second insert 44. Two counterweight control adjustment groups 6 are respectively installed in the frame 211 of the first receiving chamber 21 of each counterweight control shell 2. Each counterweight 5 is equally divided and equally weighted on both sides of each frame 211. Each counterweight control adjustment group 6 includes a rotating group 61, a shaft 62 and an adjustment block 63. Each rotating group 61 is located at the top of the outer periphery of each counterweight control shell 2. Each shaft 62 is connected to the rotating group 61 at one end. The other end of the shaft 62 passes through the first receiving chamber 21 of each counterweight control housing 2 and through each frame 211 before being assembled with each adjusting block 63. Each adjusting block 63 corresponds to the control protrusion 42 of each fastener 4. The periphery of each adjusting block 63 is respectively recessed to form a first groove 631, a second groove 632, and a third groove 633. The distance from the center point P of each adjusting block 63 to the first groove 631 is defined as the first distance A, the distance from the center point P to the second groove 632 is defined as the second distance B, and the distance from the center point P to the third groove 633 is defined as the third distance C. The first distance A > the second distance B > the third distance C (see [reference]). Figure 6(As shown); where, when each adjusting block 63 rotates, causing the control protrusion 42 of each fastener 4 to engage in the first groove 631, each adjusting block 63 pushes each fastener 4 away from each counterweight 5. At this time, each counterweight 5 is not engaged with each fastener 4, and the grip handle 1 is lifted to form a release mode. When each adjusting block 63 rotates, causing the control protrusion 42 of each fastener 4 to engage in the second groove 632, each spring 41 elastically pushes each fastener 4 towards each counterweight 5, and each first insert 43 engages in the corresponding counterweight 5's latching groove 51. At this time, the grip handle 1 is lifted. The movement of some counterweights 5 creates a first load-bearing mode, while the other counterweights 5 detach from the opening 212 and remain on the base 200. Finally, when each adjusting block 63 rotates, causing the control protrusion 42 of each fastener 4 to engage with the third groove 633, the elasticity of each spring 41 is fully released, pushing each fastener 4 towards each counterweight 5. The first insert 43 and the second insert 44 are then engaged in the corresponding buckle groove 51 of the counterweight 5. At this point, the handle 1 is lifted, causing all the counterweights 5 to move and thus creating a second load-bearing mode.

[0028] Based on the above description of the present invention, the user can use each rotating group 61 to control the axis 62 to drive the adjusting block 63 to rotate. Depending on the user's needs and suitable weight, they can select from three modes: release mode, first load mode, and second load mode. Users with less strength can perform weight training without using the bar plates 100 by selecting from these three modes, operating the device solely using the handle 1 and the weight blocks 5 within the two weight control housings 2. For users with greater strength, in addition to using the bar plates 100... By using the weight blocks 5 inside each weight control shell 2, users can gradually increase the load weight, avoiding the risk of rapid weight increase causing user strain, muscle injury, or other dangers. In addition, for users with greater strength, if using all the bar plates 100 is still not enough, they can increase the weight by using the weight blocks 5 inside each weight control shell 2. In this way, there is no need to replace the entire set of equipment in order to increase the weight, which saves costs and avoids additional expenses. Moreover, it is simple and easy to operate, which is in line with the direction pursued by many users today.

[0029] Based on the main technologies described above, the following further explains other technical features and detailed structures of the present invention. Please see below. Figures 4 to 9 , Figures 11A to 16As shown, the rotary assembly 61, which provides user control, comprises a knob 611, a return spring 612, and a limiting screw 613. Each knob 611 has a mounting hole 614 extending through its top and bottom ends, and each mounting hole 614 is divided into a large-diameter and a small-diameter section. One end of each shaft 62 is inserted into one end of the mounting hole 614 of each knob 611, and a fixing screw 64 is inserted through the other end of the mounting hole 614 and locked to each shaft 62. The locking of each fixing screw 64 will close the opening of the mounting hole 614. Each reset spring 612 is installed in each mounting hole 614 and sleeved on the outer circumference of each shaft 62. One end of each reset spring 612 springs against the boundary between the large and small diameters within the mounting hole 614, while the other end springs against the head of each fixing screw 64, thus restricting the spring 612 from springing out. Each limiting screw 613 passes through the circumference of each knob 611 and has one end embedded in the limiting groove 621 recessed on the circumference of each shaft 62. The limiting groove 621 of each shaft 62 is axially oriented. (Continued...) Figure 1 , Figure 11A , Figure 11B , Figures 14 to 16 As shown, each counterweight control housing 2 has a recessed platform 23 at its top. The portion of each knob 611 exposed outside the counterweight control housing 2 is located on this platform 23. Several anti-disengagement grooves 615 are recessed around the periphery of each knob 611, and several counterweight markings 616 are further marked on the top surface of each knob 611. The anti-disengagement grooves 615 are spaced apart. At the included angle of the platform 23, corresponding to the location of the anti-disengagement grooves 615 on each knob 611, there are protruding fitting blocks 231. Each fitting block 231 is inserted into the corresponding anti-disengagement groove 615 in the release mode, the first load mode, and the second load mode. Therefore... When the user wants to select the weight, they only need to pull the knob 611 upwards to disengage the anti-disengagement groove 615 from the locking block 231. Then, rotate the knob 611 according to the pattern data shown on the counterweight marking diagram 616. After the locking block 231 is aligned with another anti-disengagement groove 615, the force of pulling the knob 611 upwards can be released. The reset spring 612 will drive the knob 611 to reset and allow the locking block 231 to engage with the adjusted anti-disengagement groove 615. This can prevent the adjustment block 63 from disengaging from the control protrusion 42 after the weight of the counterweight 5 has been selected.

[0030] Continuing from the above explanation, in addition to the aforementioned method that restricts the arbitrary rotation of knob 611 to ensure the adjusted settings, please see... Figure 5 , Figures 14 to 16As shown, several locking grooves 622 are further recessed around the portion of each shaft 62 located within the first accommodating chamber 21. Each locking groove 622 extends from top to bottom in the shape of a long groove. Each partition 3 has a column rib 32 protruding towards each shaft 62, and a ball block 33 protruding from the end face of each column rib 32. In the release mode, the first load mode, and the second load mode, the rotation of each shaft 62 will cause each ball block 33 to be embedded in any locking groove 622, so that each shaft 62 can be positioned in the above modes to prevent self-rotation. Therefore, through the cooperation of the anti-disengagement groove 615 of the knob 611 and the fitting block 231, plus the engagement of the ball block 33 and the locking groove 622, the adjusted settings can be more securely restricted, providing the user with stable operation.

[0031] In addition, regarding the setting of each fastener 4, in order to maintain the lateral movement stability of each fastener 4, please see... Figure 5 , Figures 7 to 9 As shown, each fastener 4 has several positioning grooves 45 recessed at one end where it is abutted by each spring 41. The number of positioning grooves 45 is the same as the number of springs 41. Each positioning groove 45 has a protruding rib 451. One end of each spring 41 is located in the positioning groove 45 and sleeved on the rib 451. In this way, the ribs 451 can prevent the springs 41 from deforming during the displacement of each fastener 4, thus affecting the displacement stability of each fastener 4. After the user selects the appropriate weight of the counterweight 5 by adjusting the rotating assembly 61, the user can hold the handle 1 and lift it up to operate. If the user selects the first load mode, because the first inserts 43 in each fastener 4 will first engage in the locking grooves 51 of part of the counterweight 5, when the user lifts the handle 1, the counterweight 5 that is not engaged by the second inserts 44 will remain on the base 200. In order to ensure that the remaining counterweight 5 can be reliably engaged... The counterweights 5 are positioned such that each counterweight 5 is mounted on one end of the base 200 in an inverted cone shape. The base 200 further has two recessed placement slots 201 corresponding to the installation of each counterweight 5 within the counterweight control housing 2. The groove shape of each placement slot 201 is the same as the inverted cone-shaped end of each counterweight 5. Because the bottom of each counterweight 5 is inverted cone-shaped, and the groove shape of each placement slot 201 is the same as the bottom of the counterweight 5, the counterweights 5 remaining in the placement slots 201 can stand firmly and are not easily tipped over. Please see... Figure 4As shown. Furthermore, the present invention employs two main design configurations for each counterweight 5. Firstly, each counterweight 5 is elongated and tapered at both ends, with each counterweight 5 being an independent structure (not shown). Secondly, each counterweight control housing 2 contains two counterweights 5, each U-shaped and of different sizes. The smaller counterweight 5 is stacked within the groove of the larger counterweight 5. Therefore, when the user rotates the rotating assembly 61 and selects the first load mode, each first insert 43 in each fastener 4 aligns with the latching slots 51 at both ends of the smaller counterweight 5. After adjustment, the handle 1 can be lifted. At this time, each counterweight control housing 2 contains only one small counterweight 5, while the larger counterweight 5 remains in the placement slot 201 of the base. Figure 5 , Figure 11B As shown, if the user wants to increase the weight, after returning the grip handle 1, the rotating assembly 61 is adjusted again so that the second inserts 44 in each fastener 4 are engaged in the locking slots 51 at both ends of the large counterweight 5. At this time, the first inserts 43 and the second inserts 44 of each fastener 4 are engaged in the locking slots 51 of the large and small counterweights 5. In this way, the weight control shell 2 that is lifted has the total weight of the two counterweights 5. Figure 13 This setting allows users to fine-tune the appropriate weight for weight training.

[0032] Finally, in terms of the structural composition of each counterweight control shell 2, the present invention mainly adopts a front baffle 24, a front frame 25, a rear frame 26, and a rear baffle 27 spliced ​​together. The front frame 25 is inverted C-shaped, and the platform 23 is also located at the top of the front frame 25. The front baffle 24 is locked to one end of the front frame 25, and the rear frame 26 is locked to the other end of the front frame 25 at one end. The partition 3 is installed between the front frame 25 and the rear frame 26, and the rear baffle 27 is locked to the other end of the rear frame 26. The assembly of the front baffle 24, the front frame 25, and the partition 3 forms the first... The first receiving chamber 21 is formed by assembling the partition 3, the rear frame 26, and the rear baffle 27. This allows each counterweight 5 to be placed in the first receiving chamber 21, and each fastener 4 and spring 41 to be placed in the second receiving chamber 22 (each fastener 4 moves between the first receiving chamber 21 and the second receiving chamber 22 due to displacement of the cutout 31 on the partition 3). This isolates the movement of each component, preventing interference and maintaining the stability of the engagement between the fastener 4 and the counterweight 5 after adjustment. (See [link to relevant documentation]). Figure 5 As shown.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A weight adjustment mechanism for a fitness device, primarily used in conjunction with several weight plates and placed on a base, characterized in that, include: Hold the handle; Two counterweight control shells are respectively assembled at both ends of the grip handle and mounted on the base. The two counterweight control shells are movably assembled and separated from several lever plates. The two counterweight control shells are respectively provided with partitions to divide the internal space into a first accommodating chamber and a second accommodating chamber, and each first accommodating chamber has an opening at the bottom. Two fasteners are installed inside the two counterweight control housings and move with the slit displacement of each partition. The slits of each partition connect the first accommodating chamber and the second accommodating chamber. Several springs are provided, with one end abutting against one end of each fastener, and the other end of each spring abutting against the inner wall of the second accommodating chamber. Each fastener has a control protrusion, two first inserts and two second inserts extending from one end corresponding to the slit. Several counterweights are evenly and movably arranged in the first accommodating chamber of each counterweight control shell, and each counterweight is recessed to form a buckle groove corresponding to each fastener. The movable displacement of each fastener is respectively engaged into the corresponding buckle groove by each first insert and each second insert. Two counterweight control adjustment groups are respectively installed in the frames of the first accommodating chamber of each counterweight control shell. Each counterweight block is equally distributed on both sides of each frame. Each counterweight control adjustment group includes a rotating group, a shaft, and an adjustment block. Each rotating group is located at the top of the outer periphery of each counterweight control shell. Each shaft is connected to the rotating group at one end, and the other end of each shaft passes through the first accommodating chamber of each counterweight control shell and through each frame to be connected to each adjustment block. Each adjustment block corresponds to the control protrusion of each fastener, and each adjustment block is recessed to form a first groove, a second groove, and a third groove. The distance from the center point of each adjustment block to the first groove is defined as the first distance, the distance from the center point to the second groove is defined as the second distance, and the distance from the center point to the third groove is defined as the third distance, and the first distance > the second distance > the third distance. When each adjusting block rotates, causing the control protrusion of each fastener to engage in the first groove, each adjusting block pushes each fastener away from each counterweight. At this time, each counterweight is not engaged with each fastener. The handle is then lifted to form a release mode. When each adjusting block rotates, causing the control protrusion of each fastener to engage in the second groove, each spring elastically pushes each fastener toward each counterweight, and each first insert engages in the corresponding counterweight's locking groove. At this time, the handle is lifted to move some counterweights, thus forming the first load mode. The other part of the counterweights detaches from the first receiving chamber from each opening and remains on the base. Finally, when each adjusting block rotates, causing the control protrusion of each fastener to engage in the third groove, the elasticity of each spring is fully released, pushing each fastener toward each counterweight again. Each first insert and each second insert engages in the corresponding counterweight's locking groove. At this time, the handle is lifted to move all counterweights, thus forming the second load mode.

2. The weight adjustment mechanism of the fitness equipment according to claim 1, characterized in that, Each rotating assembly further includes a knob, a reset spring, and a limiting screw. Each knob has a mounting hole that extends through the top and bottom ends. One end of each shaft is inserted into one end of the mounting hole of each knob, and a fixing screw is inserted through the other end of the mounting hole to lock the shaft. Each reset spring is installed in the mounting hole and sleeved on the outer circumference of each shaft, and the spring is restricted from being released by each fixing screw. Each limiting screw is inserted through the circumference of each knob and one end is embedded in the limiting groove recessed on the circumference of each shaft. The limiting groove of each shaft is axially arranged.

3. The weight adjustment mechanism of the fitness equipment according to claim 1, characterized in that, Each fastener has several positioning grooves recessed at one end where it is abutted by each spring. Each positioning groove has a protruding rib. One end of each spring is located in each positioning groove and is sleeved on each protruding rib.

4. The weight adjustment mechanism of the fitness equipment according to claim 1, characterized in that, The portion of each axis located within the first accommodating chamber is further surrounded by several locking grooves, and each partition has a column rib protruding towards each axis, with a ball protruding from the end face of each column rib. In the release mode, the first load-bearing mode, and the second load-bearing mode, the rotation of each axis will cause each ball to embed into any of the locking grooves, so that each axis can be positioned in the above modes to prevent rotation.

5. The weight adjustment mechanism of the fitness equipment according to claim 1, characterized in that, Each counterweight is mounted on one end of the base in an inverted cone shape, and the base is further recessed with two placement grooves corresponding to the installation of each counterweight in the counterweight control housing. The groove shape of each placement groove is the same as the inverted cone-shaped end of each counterweight.

6. The weight adjustment mechanism of the fitness equipment according to claim 1, characterized in that, Each counterweight control housing further includes a front baffle, a front frame, a rear frame, and a rear baffle. The front baffle is locked to one end of the front frame, and the rear frame is locked to the other end of the front frame. The partition is installed between the front frame and the rear frame, and the rear baffle is locked to the other end of the rear frame. The assembly of the front baffle, the front frame, and the partition forms the first accommodating chamber, while the assembly of the partition, the rear frame, and the rear baffle forms the second accommodating chamber.

7. The weight adjustment mechanism of the fitness equipment according to claim 2, characterized in that, Several counterweight markings are further marked on the top surface of each knob.

8. The weight adjustment mechanism of the fitness equipment according to claim 2, characterized in that, The top of each counterweight control housing is recessed to form a platform, and the part of each knob exposed outside the counterweight control housing is located on the platform. Several anti-disengagement grooves are provided on the periphery of each knob, and the anti-disengagement grooves are spaced apart. At the included angle of the platform and at the position corresponding to the position where several anti-disengagement grooves are provided on each knob, there is a protruding fitting block. Each fitting block is inserted into the corresponding anti-disengagement groove in the release mode, the first load mode, and the second load mode.

9. The weight adjustment mechanism of the fitness equipment according to claim 1, characterized in that, Each of the counterweights is long and narrow.

10. The weight adjustment mechanism of the fitness equipment according to claim 1, characterized in that, Each counterweight is U-shaped, and the counterweights on the same side are stacked on top of each other.

Images