TWI871263B - Weight adjustment mechanism for fitness equipment - Google Patents

Abstract

The present invention is a weight adjustment mechanism for fitness equipment, which is mainly used with a plurality of bar pieces and placed on the base. It includes: a holding handle, two counterweight control shells, two fasteners, a plurality of counterweight blocks and two counterweight controls. The adjustment group can be combined with each bar plate to obtain training with different weights. It can also be set by each counterweight block. The user only needs to rotate and control the two rotation groups to drive each adjustment block to rotate. By The difference in distance between the first, second and third grooves provided on each adjustment block relative to the center point drives each fastener to engage with each counterweight block. The user only needs to turn the fastener according to their own needs. After rotating the group, you can add or reduce a little weight (depending on the weight of each counterweight block, the weight of each counterweight block can be smaller or larger than the weight of the bar). For users with low strength, they only need to lift the handle Hold the handle and match the weight of each counterweight block to perform weight-bearing operations (bar pieces are not included). For users with greater strength, in addition to the installation of the bar pieces, each counterweight block can also be added The weight can be further increased slightly according to the needs, thereby eliminating the cost of replacing the entire set of training components, thereby meeting various weight-bearing training needs.

Description

Weight adjustment mechanism for fitness equipment

The present invention is a weight adjustment mechanism for fitness equipment, specifically a technology applied in the field of fitness, which is mainly aimed at adjusting the weight of the handle of a barbell to provide users with less strength to operate and use the bar, or to increase the weight of the barbell when the barbell is not heavy enough. This is an invention with excellent practicality.

Fitness is a kind of exercise that is very suitable for men, women, young and old. Nowadays, there are many gyms, which gives the public more choices for fitness. However, each fitness equipment requires proper strength to operate. For example, girls and children are unable to operate it properly because of their weak strength. However, the simple handle cannot achieve the fitness effect.

Continuing with the above, for users with greater strength, the weight of general barbells, lifting bells, kettlebells, etc. is mostly increased or decreased by combining pieces of bar plates. Users can gradually increase or decrease the number of bar plates to operate a barbell of appropriate weight. However, general barbells on the market have a maximum weight when used. For professional athletes who have been exercising for a long time, if they want heavier weights, they must change to another set, which is very inconvenient for users. In addition, some users have barbells at home, so they must spend a high cost to purchase multiple sets of barbells of different weights.

Therefore, whether for users with less or more strength, using the barbell with appropriate weight, or even slightly increasing or decreasing the weight, is a function that users need.

The main purpose of the present invention is to provide users with fitness equipment such as barbells, lifting bells, kettlebells, etc., which can adjust the weight by increasing the number of plates when doing fitness exercises. More importantly, it can adjust the weight in detail so that users with different strengths can conduct targeted weight training. The improved barbells, lifting bells, and kettlebells are not suitable for users with less strength because the plates are too heavy, and are not suitable for users with greater strength who need to increase weight training because the total weight is fixed, resulting in the need to increase costs and replace the entire set of equipment.

However, in order to achieve the above-mentioned effects and improve the deficiencies of the prior art, the present invention provides a weight adjustment mechanism for a fitness device, which is mainly used in conjunction with a plurality of levers, and includes: A gripping handle; two counterweight control shells, which are respectively assembled at the two ends of the gripping handle and mounted on the base, and the two counterweight control shells are respectively assembled and separated with a plurality of levers, and a partition is respectively arranged in the two counterweight control shells to separate the internal space to form a first accommodation chamber and a second accommodation chamber, and each first accommodation chamber has an opening at the bottom; two fasteners, which are installed in the two counterweight control shells and are movable to move at a cutout of each partition, and the cutout of each partition is connected to the first accommodation chamber and the second accommodation chamber, and a plurality of springs are arranged to have one end of each fastener rebound against one end of each fastener, and the other end of each spring rebounds against the inner wall of the second accommodation chamber, and one end of each fastener corresponding to the cutout is extended with a control convex block, two first accommodation chambers ... a control convex block, two first accommodation chambers, and a plurality of springs are arranged to have a control convex block, two first accommodation chambers, and a plurality of springs are arranged to have a control convex block, two first accommodation chambers, and a plurality of springs are arranged to have a control convex block, two first accommodation chambers, two first accommodation chambers, and a plurality of springs are arranged to have a control convex block, two first accommodation chambers, two first accommodation chambers, and a plurality of springs are arranged to have a control convex block, two first accommodation chambers, two first accommodation chambers, two first accommodation chambers, two first accommodation chambers, two first accommodation chambers, two first accommodation chambers, two first accommodation chambers, two first accommodation chambers, two first accommodation chambers, two first accommodation chambers, two first accommodation chambers, two first accommodation chambers, two first accommodation chambers, two first The invention relates to a first counterweight control housing, wherein the counterweight blocks are evenly arranged in the first accommodation chamber of each counterweight control housing, and each counterweight block is respectively concavely arranged to form a buckle groove corresponding to each fastener, and the movable displacement of each fastener is respectively achieved by the first counterweight block and the second counterweight block being respectively snapped into the corresponding buckle groove; two counterweight control adjustment groups, which are respectively installed in a frame in the first accommodation chamber of each counterweight control housing, and each counterweight block is equally divided and located on both sides of each frame, and each counterweight control adjustment group includes a rotation group, a shaft and an adjustment block, and each rotation group is located at the top end of the outer peripheral side of each counterweight control housing, and each shaft is connected to each rotation group with one end, and the other end of each shaft penetrates into the first accommodation chamber of each counterweight control housing. The adjusting blocks are placed in the chamber and pass through each frame and are assembled with each adjusting block. Each adjusting block corresponds to the control protrusion of each fastener. Each adjusting block is concavely formed around a first groove, a second groove and a third groove. The distance from a center point of each adjusting block to the first groove is defined as a first distance, the distance from the center point to the second groove is defined as a second distance, and the distance from the center point to the third groove is defined as a third distance. The distance of the third slot is defined as the third distance, and the first distance>the second distance>the third distance; wherein, when each adjusting block rotates to make the control protrusion of each fastener engage in the first slot, each adjusting block pushes each fastener away from each counterweight block, at which time each counterweight block is not engaged with each fastener, and the gripping handle is lifted to form a release mode, and when each adjusting block When the control protrusion of each fastener is rotated to engage with the second groove, each spring elastically pushes each fastener toward each counterweight block, and each first insert is engaged with the corresponding counterweight block buckle groove. At this time, the handle is lifted to drive part of the counterweight block to move to form a first weight-bearing mode, while the other part of the counterweight block is separated from the first accommodation chamber from each opening and The adjusting blocks are kept on the base. Finally, when the adjusting blocks are rotated to make the control protrusions of the fasteners engage with the third grooves, the elasticity of the springs is completely released to push the fasteners to move toward the counterweight blocks, and the first and second embedded blocks are inserted into the corresponding buckle grooves of the counterweight blocks. At this time, the handle is lifted to drive all the counterweight blocks to move, thereby forming a second weight-bearing mode.

According to the above-mentioned technology of the present invention, its advantage is that, in addition to being able to use the combination of each bar plate to obtain different weight training uses, it is also possible to use the setting of each counterweight block, and the user only needs to rotate the two rotating groups to drive the rotation of each adjustment block. By the difference in the distance between the first slot, the second slot and the third slot set on each adjustment block and the center point, the user drives the locking of each fastener relative to each counterweight block. The user only needs to rotate the rotating group according to his own needs to increase or decrease a little weight (depending on the weight of each counterweight block, the weight of each counterweight block can be less than or equal to). For users with less strength, they only need to lift the handle and match the weight of each counterweight to carry out the weight-bearing operation (excluding the bar), while for users with greater strength, in addition to matching the installation of the bar, they can also add the weight of each counterweight, and further increase the weight slightly according to needs, thereby avoiding the cost of replacing the entire set of training components, and thus achieving various weight-bearing training needs. It can be seen that the present invention can be said to be a very practical and progressive invention, which is quite worthy of promotion by the industry and public disclosure to the public.

The following is a specific example to illustrate the weight adjustment mechanism of the fitness equipment of the present invention. People familiar with this technology can easily understand other advantages and effects of the present invention from the content disclosed in this manual. The present invention can also be implemented or applied through other different specific examples, and the details in this manual can also be modified and changed in various ways based on different viewpoints and applications. The following implementation method further illustrates the viewpoint of the present invention in detail, but does not limit the scope of the present invention by any viewpoint.

As shown in the first to sixteenth figures, the weight adjustment mechanism of a fitness equipment of the present invention is mainly used in conjunction with a plurality of bars 100 and placed on a base 200, and comprises: a handle 1 in a cylindrical shape; two weight control shells 2, which are respectively assembled at the two ends of the handle 1 and movably mounted on the base 200, and the two weight control shells 2 are respectively assembled and separated from the plurality of bars 100, and a partition 3 is respectively arranged in the two weight control shells 2 to separate the internal space to form a first accommodation chamber 21 and a second accommodation chamber 22, and each first accommodation chamber 21 has an opening 212 at the bottom; two fasteners 4, which are installed on the two weight control shells The housing 2 is made to move in a cutout 31 of each partition 3. The cutout 31 is opened transversely on the partition 3. The cutout 31 of each partition 3 is connected to the first accommodation chamber 21 and the second accommodation chamber 22. A plurality of springs 41 are provided to abut one end of each fastener 4 with one end thereof, and the other end of each spring 41 abuts against the inner wall of the second accommodation chamber 22. Each spring 41 elastically drives each fastener 4 to move in a corresponding cutout 31. One end of the housing 2 is provided with a control protrusion 42, two first inserts 43 and two second inserts 44, 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; a plurality of counterweight blocks 5 are evenly arranged in the first accommodation chamber 21 of each counterweight control housing 2, and each counterweight block 5 is respectively concavely formed with a buckle groove 51 at the position corresponding to each fastener 4, and the movable displacement of each fastener 4 is respectively Each first insert block 43 and each second insert block 44 are respectively snapped into the corresponding snap grooves 51; two counterweight control adjustment groups 6 are respectively installed in a frame 211 in the first accommodation chamber 21 of each counterweight control shell 2, and each counterweight block 5 is equally divided and equally weighted and is located on both sides of each frame 211. Each counterweight control adjustment group 6 includes a rotation group 61, a shaft 62 and an adjustment block 63. Each rotation group 61 is located at the top end of the outer peripheral side of each counterweight control shell 2. Each shaft 62 is assembled with each rotating assembly 61 at one end, and the other end of each shaft 62 is inserted into the first accommodation chamber 21 of each counterweight control housing 2 and passes through each frame 211 and then assembled with each adjustment block 63. Each adjustment block 63 corresponds to the control protrusion 42 of each fastener 4. Each adjustment block 63 is concavely formed around a first groove 631, a second groove 632 and a third groove 633. The distance from a center point P of each adjustment block 63 to the first groove 631 is defined as The first distance A is defined as the distance from the center point P to the second groove 632, the second distance B is defined as the distance from the center point P to the third groove 633, and the first distance A> the second distance B> the third distance C (see the sixth figure); wherein, when each adjusting block 63 rotates to make the control protrusion 42 of each fastener 4 engage in the first groove 631, each adjusting block 63 pushes each fastener 4 away from each counterweight block 5, and at this time each counterweight block 5 is not in contact with the first fastener 4. The fasteners 4 are engaged with each other, and the handle 1 is lifted to form a release mode. When the adjustment blocks 63 are rotated to make the control protrusions 42 of the fasteners 4 engage the second grooves 632, the springs 41 elastically push the fasteners 4 to move toward the counterweights 5, and the first inserts 43 are inserted into the corresponding buckle grooves 51 of the counterweights 5. At this time, the handle 1 is lifted to drive part of the counterweights 5 to move to form a first negative weight mode, while the other part of the counterweights 5 are released from the opening mode. The first accommodating chamber 21 is separated from the opening 212 and remains on the base 200. Finally, when each adjusting block 63 rotates to make the control protrusion 42 of each fastener 4 engage with the third groove 633, the elasticity of each spring 41 is completely released to push each fastener 4 to move toward each counterweight block 5 again, and each first embedded block 43 and each second embedded block 44 are engaged with the corresponding buckle groove 51 of the counterweight block 5. At this time, the handle 1 is lifted to drive all the counterweight blocks 5 to move, thereby forming a second weight-bearing mode.

According to the above description of the present invention, the user can use the rotation group 61 to control the axis 62 to drive the adjustment block 63 to rotate. According to the needs of the user and the appropriate weight of the user, the user can choose from the three modes of release mode, first weight mode, and second weight mode. For users with less strength, they can choose from the above three modes to perform weight training without using multiple levers 100. They can only use the handle 1 and the weight blocks 5 in the two weight control shells 2 to operate. For users with greater strength, in addition to using the levers 100, By using the counterweights 5 in the counterweight control shells 2, the user can gradually increase the weight to avoid dangerous situations such as burden on the user and muscle injury caused by rapid weight gain. In addition, for those users with greater strength, if all the bars 100 have been used and are still not enough, the weight can be increased by using the counterweights 5 installed in the counterweight control shells 2. In this way, there is no need to replace the entire set of equipment to increase the weight, which can save costs and eliminate additional expenses. In addition, the operation is simple and easy to use, which is in line with the direction pursued by many users today.

After the main technology described above, the other technical features and detailed structures of the present invention are further described below. First, please refer to Figures 4 to 9 and 11 to 16. In the setting of the rotating group 61 for user control, its structure includes a knob 611, a return spring 612 and a limit screw 613. Each knob 611 is provided with a mounting hole 614 passing through the top and bottom ends, and each mounting hole 614 is divided into two parts with a large aperture and a small aperture. One end of each axis 62 is inserted into one end of the mounting hole 614 of each knob 611, and a fixing screw 64 is inserted from the other end of the mounting hole 614 and locked. Each axis 62 and each fixing screw 64 are locked to close the opening of the mounting hole 614. Each return spring 612 is installed in each mounting hole 614 and sleeved on the outer periphery of each axis 62. One end of each return spring 612 bounces against the boundary between the large hole diameter and the small hole diameter in the mounting hole 614. The other end of each return spring 612 bounces against the head end of each fixing screw 64, and each fixing screw 64 limits the rebound of each return spring 612. Each limit screw 613 is inserted from the circumference of each knob 611 and one end is embedded in a limit groove 621 recessed on the circumference of each axis 62. The limit groove 621 of each axis 62 is axially arranged. As shown in the first, eleventh, eleventh A, fourteenth to sixteenth figures, the top of each counterweight control shell 2 is respectively recessed to form a platform 23, and the portion of each knob 611 exposed outside the counterweight control shell 2 is located on the platform 23, and the periphery of each knob 611 is also recessed with a plurality of anti-slip grooves 615, and the top end surface of each knob 611 is further marked with a plurality of counterweight markings 616, and the anti-slip grooves 615 are arranged at intervals, and a fitting block 231 is protruded at the corner of the platform 23 and corresponding to the position where each knob 611 is provided with a plurality of anti-slip grooves 615, and each fitting block 231 is inserted into the relative position in the release mode, the first load mode, and the second load mode. Therefore, when the user wants to select the weight, he only needs to pull up the knob 611 to disengage the anti-disengagement groove 615 from the engagement block 231, and then rotate the knob 611 according to the graphic data displayed on each counterweight mark diagram 616. After the engagement block 231 is aligned with another anti-disengagement groove 615, the force pulling the knob 611 upward can be released, and the reset spring 612 will drive the knob 611 to reset, and allow the engagement block 231 to engage with the adjusted anti-disengagement groove 615, thereby preventing the adjustment block 63 and the control protrusion 42 from being separated again after the weight selection of the counterweight block 5 is completed.

Continuing with the above description, in addition to the aforementioned method of limiting the arbitrary rotation of the knob 611 to ensure the adjusted setting, as shown in FIGS. 5, 14 to 16, a plurality of locking grooves 622 are further provided around the portion of each axis 62 located in the first accommodation chamber 21. The groove direction of each locking groove 622 extends from top to bottom and presents a long groove shape. Each partition 3 is provided with a column rib 32 protruding toward each axis 62, and a ball block is provided protruding on the end surface of each column rib 32. 33. In the release mode, the first load-bearing mode and the second load-bearing mode, the rotation of each axis 62 will cause each ball block 33 to be embedded in any locking groove 622, so that each axis 62 can be positioned in the above-mentioned modes to prevent self-rotation. Therefore, through the cooperation between the anti-disengagement groove 615 of the knob 611 and the engaging block 231, and the engagement between the ball block 33 and the locking groove 622, the adjusted setting can be more stably restricted, providing the user with stability in operation.

In addition, in the arrangement of each fastener 4, in order to maintain the lateral movement stability of each fastener 4, as shown in Figures 5, 7 to 9, one end of each fastener 4 that is supported by each spring 41 is further recessed with a plurality of positioning grooves 45, and the number of each positioning groove 45 is the same as the number of each spring 41. A convex rib 451 is convexly provided in each positioning groove 45, and one end of each spring 41 is located in each positioning groove 45 and sleeved on each convex rib 451. In this way, the arrangement of each convex rib 451 can prevent the deformation of each spring 41 during the displacement of each fastener 4, thereby preventing the displacement stability of each fastener 4 from being affected. 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 upward to operate. If the user selects the first weight-bearing mode, because the first inserts 43 in the fasteners 4 will first be inserted into the buckle grooves 51 of part of the counterweight 5, when the user lifts the handle 1, the counterweight 5 that is not inserted by the second inserts 44 will remain on the base 200, and in order to provide a secure placement for the remaining counterweight 5, Therefore, one end of each counterweight block 5 mounted on the base 200 is in an inverted cone shape, and the base 200 corresponding to the installation of each counterweight block 5 in each counterweight control shell 2 is further recessed with two placement grooves 201. The groove shape of each placement groove 201 is the same as the inverted cone-shaped end of each counterweight block 5. Because the bottom end of the counterweight block 5 is in an inverted cone shape and the groove shape of each placement groove 201 is the same as the bottom end of the counterweight block 5, the counterweight block 5 remaining in the placement groove 201 can be firmly placed and not easily tipped over, as shown in the fourth figure. In addition, the present invention mainly adopts two types of settings for the design of each counterweight block 5. The first type is that each counterweight block 5 is long and has two conical ends at the top and bottom, and each counterweight block 5 is an independent structure (not shown). The second type is that each counterweight control shell 2 is provided with two counterweight blocks 5, and each counterweight block 5 is U-shaped and one large and one small. The small counterweight block 5 will be stacked in the groove of the large counterweight block 5. Therefore, when the user rotates the rotating group 61 and selects the first negative weight mode, each first insert 43 in each fastener 4 will first align with the buckle grooves 51 at both ends of the small counterweight block 5. After the adjustment and setting are completed, the handle 1 can be lifted, and then each counterweight control shell 2 has only one small counterweight 5, and the large counterweight 5 will remain in the placement groove 201 of the base as shown in Figures 5 and 11A. When the user wants to increase the weight, he will adjust the rotating group 61 again after putting the grip 1 back, so that the second inserts 44 in each fastener 4 are snapped into the snap grooves 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 snapped into the snap grooves 51 of the large and small counterweights 5. In this way, the lifted counterweight control shell 2 has the total weight of the two counterweights 5 (Figure 13). Through this setting, the user can finely adjust the appropriate weight for weight training operations.

Finally, the present invention mainly adopts a front baffle 24, a front frame 25, a rear frame 26 and a rear baffle 27 to be connected to each other in the structural composition of each counterweight control housing 2. The front frame 25 is in an inverted C shape. The platform 23 is also arranged at the top end of the front frame 25. The front baffle 24 is locked to one end of the front frame 25. 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. 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 accommodating chamber 21, and the assembly of the partition 3, the rear frame 26 and the rear baffle 27 forms the second accommodating chamber 22, so that each counterweight 5 can be arranged in the first accommodating chamber 21, and each fastener 4 and the spring 41 can be arranged in the second accommodating chamber 22 (each fastener 4 is displaced in the cutout 31 on the partition 3, so each fastener 4 moves between the first accommodating chamber 21 and the second accommodating chamber 22), thereby separating the movements of each component, and there will be no interference between each other, thereby maintaining the stability of the clamping between each fastener 4 and each counterweight 5 after adjustment, as shown in the fifth figure.

100: lever 200: base 201: placement slot 1: grip handle 2: counterweight control shell 21: first storage chamber 211: frame 212: opening 22: second storage chamber 23: platform 231: fitting block 24: front baffle 25: front frame 26: rear frame 27: rear baffle 3: partition 31: cutout 32: column rib 33: ball block 4: fastener 41: spring 42: control convex block 43: first insert block 44: second insert block 45: positioning slot 451: convex rib 5: counterweight block 51: buckle slot 6: counterweight control adjustment group 61: Rotating assembly 611: Knob 612: Return spring 613: Limit screw 614: Mounting hole 615: Anti-slip groove 616: Counterweight mark 62: Axis 621: Limit groove 622: Locking groove 63: Adjustment block 631: First groove 632: Second groove 633: Third groove 64: Fixing screw P: Center point A: First distance B: Second distance C: Third distance

The first figure is a three-dimensional schematic diagram of the present invention. The second figure is a three-dimensional schematic diagram of the present invention from another viewing angle. The third figure is a three-dimensional schematic diagram of the present invention placed on the base. The fourth figure is a decomposed schematic diagram of the third figure. The fifth figure is a partially decomposed schematic diagram of the first figure. The sixth figure is a planar schematic diagram of the adjustment block of the present invention. The seventh figure is a schematic diagram of the VII-VII line segment section of the first figure. The eighth figure is a schematic diagram of the VIII-VIII line segment section of the seventh figure. The ninth figure is a schematic diagram of the IX-IX line segment section of the first figure. The tenth figure is a schematic diagram of the seventh figure rotating the rotating group, after the control convex block jumps, each first insert of the fastener is inserted into the corresponding buckle groove of the counterweight block. Figure 11 is a schematic diagram of the rotation of the rotating group in Figure 8, after the control convex block jumps, each first insert of the fastener is inserted into the corresponding buckle groove of the counterweight block. Figure 11A is a schematic diagram of the action of lifting up in Figure 9 so that part of the counterweight block is driven away from the base. Figure 12 is a schematic diagram of the rotation of the rotating group in Figure 10 again, after the control convex block jumps, each first insert and each second insert of the fastener are inserted into the buckle groove of the corresponding counterweight block. Figure 13 is a schematic diagram of the rotation of the rotating group in Figure 11 again, after the control convex block jumps, each first insert and each second insert of the fastener are inserted into the buckle groove of the corresponding counterweight block. Figure 14 is a schematic diagram of the action of pulling the rotating group of the present invention upward for rotation adjustment. Figure 15 is a schematic diagram of the cross-section of the XV-XV line segment of Figure 14. Figure 16 is a schematic diagram of the cross-section of the XVI-XVI line segment of Figure 14.

1: Grip handle

2: Counterweight control shell

23: Platform

24: Front guard

25:Front frame

26: Rear frame

27: Rear guard

6: Counterweight control adjustment group

616:Weight marking diagram

Claims (10)

A weight adjustment mechanism of a fitness equipment, which is mainly used with a plurality of bars and placed on a base, comprises: A grip handle; Two weight control shells, which are respectively assembled at the two ends of the grip handle and mounted on the base, and the two weight control shells are respectively assembled and separated with the plurality of bars, and a partition is respectively arranged in the two weight control shells to separate the internal space to form a first accommodation chamber and a second accommodation chamber, and each first accommodation chamber has an opening at the bottom; Two fasteners are installed in the two counterweight control shells and are movable in a cutout of each partition. The cutout of each partition is connected to the first accommodation chamber and the second accommodation chamber. A plurality of springs are provided with one end rebounding against one end of each fastener, and the other end of each spring rebounds against the inner wall of the second accommodation chamber. One end of each fastener corresponding to the cutout is extended with a control convex block, two first embedded blocks and two second embedded blocks; A plurality of counterweight blocks are evenly arranged in the first accommodation chamber of each counterweight control shell, and each counterweight block is respectively recessed to form a buckle groove corresponding to each fastener. The movable displacement of each fastener is respectively caused by each first embedded block and each second embedded block being respectively snapped into the corresponding buckle groove; Two counterweight control and adjustment groups are respectively installed in a frame in the first accommodation chamber of each counterweight control shell. Each counterweight block is equally divided and located on both sides of each frame. Each counterweight control and adjustment group includes a rotating group, a shaft and an adjustment block. Each rotating group is located at the top end of the outer peripheral side of each counterweight control shell. Each shaft is connected to each rotating group at one end, and the other end of each shaft penetrates into the first accommodation chamber of each counterweight control shell and passes through each The frame is assembled with each adjustment block, and each adjustment block corresponds to the control protrusion of each fastener, and each adjustment block is concavely formed around a first groove, a second groove and a third groove. The distance from a 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 so that the control convex block of each fastener is engaged in the first groove, each adjusting block pushes each fastener away from each counterweight block. At this time, each counterweight block is not engaged with each fastener, and the handle is lifted to form a release mode. When each adjusting block rotates so that the control convex block of each fastener is engaged in the second groove, each spring elastically pushes each fastener toward each counterweight block, and each first embedding block is engaged in the corresponding buckle groove of the counterweight block. At this time, the handle is lifted to drive the parts. The distribution weight blocks move to form a first negative weight mode, while the other part of the counterweight blocks detach from the first accommodation chamber from each opening and remain on the base. Finally, when each adjustment block rotates to make the control protrusion of each buckle engage with the third groove, the elasticity of each spring is completely released to push each buckle toward each counterweight block and move again, and each first insert block and each second insert block are inserted into the corresponding buckle groove of the counterweight block. At this time, lift the handle to drive all the counterweight blocks to move to form a second negative weight mode. The weight adjustment mechanism of the fitness equipment as described in claim 1, wherein each rotating group further includes a knob, a return spring and a limit screw, each knob is provided with a mounting hole passing through the top and bottom ends, one end of each axis is inserted into one end of the mounting hole of each knob, and a fixing screw is passed through the other end of the mounting hole and locked to each axis, and each return spring is installed in each mounting hole and sleeved on the outer periphery of each axis, and each fixing screw is used to limit the spring-off of each return spring, and each limit screw is passed through the peripheral side of each knob and embedded with one end into a limit groove recessed on the peripheral side of each axis, and the limit groove of each axis is axially arranged. As described in claim 1, the weight adjustment mechanism of the fitness equipment, wherein the end of each fastener that is supported by each spring is further provided with a plurality of positioning grooves, each positioning groove has a convex rib protruding therein, and one end of each spring is located in each positioning groove and sleeved on each convex rib. As described in claim 1, the weight adjustment mechanism of the fitness equipment, wherein the portion of each axis located in the first accommodation chamber is further surrounded by a plurality of locking grooves, and each partition is provided with a column rib protruding toward each axis, and a ball block protruding from the end surface 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 block to be embedded in any locking groove, so that each axis can be positioned in the above-mentioned modes to prevent rotation. As described in claim 1, the weight adjustment mechanism of the fitness equipment, wherein each counterweight block is mounted on one end of the base in an inverted cone shape, and the base is further provided with two placement grooves corresponding to the installation of each counterweight block in each counterweight control shell, and the groove shape of each placement groove is the same as that of the inverted cone end of each counterweight block. The weight adjustment mechanism of the fitness equipment as described in claim 1, wherein each weight control shell 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, the rear frame is locked to the other end of the front frame at one end, 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, and the assembly of the partition, the rear frame and the rear baffle forms the second accommodating chamber. The weight adjustment mechanism of the fitness equipment as described in claim 2, wherein the top end surface of each knob is further marked with multiple weight markings. As described in claim 2, the weight adjustment mechanism of the fitness equipment, wherein the top end of each weight control shell is recessed to form a platform, and the portion of each knob exposed outside the weight control shell is located on the platform, and a plurality of anti-disengagement grooves are provided around each knob, and each anti-disengagement groove is spaced apart, and an engaging block is protruded at the corner of the platform and corresponding to the position where each knob is provided with a plurality of anti-disengagement grooves, and each engaging block is inserted into the corresponding anti-disengagement groove in the release mode, the first load-bearing mode, and the second load-bearing mode. The weight adjustment mechanism of the fitness equipment as described in claim 1, wherein each weight block is in the shape of a long strip. As described in claim 1, the weight adjustment mechanism of the fitness equipment, wherein each counterweight block is U-shaped, and the counterweight blocks arranged on the same side are stacked on each other.

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