The present disclosure relates to a physical exercise equipment, and particularly to a weight adjustable dumbbell.
A dumbbell is a simple equipment for strengthening muscle strength training, which is mainly made of cast iron. A conventional dumbbell can be a weight-fixed type or a weight adjustable type. The weight of a weight-fixed dumbbell is unchangeable, and the dumbbell is usually cast according to a required weight, and sometimes a rubber cover for dampness is set one the outer surface of the dumbbell. An adjustable dumbbell can adjust its weight, which includes a connecting bar and a plurality of dumbbell plates, both ends of the connecting bar has a threaded part and a limiting block, and the threaded part is extending to the end tip of the connecting bar. Therefore, the weight of the dumbbell can be adjusted by equally inserting dumbbell plates of required numbers at both ends of the connecting bar according to the requirement of weight. Also, due to the consideration of security, the threaded part of the weight adjustable dumbbell is connected to a limiting disk, so as to prevent the dumbbell plates from falling from the connecting bar.
For a conventional weight adjustable dumbbell, generally the detached dumbbell plates are stored on racks, while in use, required numbers of dumbbell plates are taken and sequentially mounted on the connecting bar, then limiting disks are mounted on both ends of the connecting bar, forming the overall structure of a dumbbell. While this kind of operation may cause difficulty in handling. In prior arts, the required numbers of dumbbell plates on the rack cannot be directly mounted on the connecting bar while the dumbbell plates are still stored on the rack, so as to reduce handling and is convenient to operate.
In order to overcome the deficiencies of the prior art, the present disclosure is aimed to provide a weight adjustable dumbbell and a method of using thereof, such that the required numbers of dumbbell plates can be directly mounted on the connecting bar, so as to reduce handling and is convenient to operate.
The technical purpose of the present disclosure can be solved by the following technical solutions:
A weight adjustable dumbbell, which includes a connecting bar and a supporting base. Two sides of a top surface of the supporting base are defined with a receiving groove, respectively. A plurality of dumbbell plates opposite to each other are provided in the receiving grooves along an axial direction, a notch is defined on each of the dumbbell plates capable to inserting the connecting bar, a slot opposite to the connecting bar is defined on an inner wall of the notch, a plurality of fasteners opposite to the dumbbell plates are provided on the connecting bar along the axial direction, the fasteners at an end of the connecting bar are arranged spirally along the axial direction, and are arranged at equal angles about the axis of the connecting bar. The plurality of fasteners can connect to the slot of the dumbbell plates sequentially by rotating the connecting bar, and the dumbbell plates are detachably connected to limiting parts that can limit the rotation of the connecting bar.
Additionally, the notch has a shape of stripe, and the notch is extending to a center of the dumbbell plate, notches of the dumbbell plates of the same side are aligned with each other. The cross-sectional shape of the notch perpendicular to the dumbbell plate is arc shaped, the slot has an arc shaped opening facing to the notch, and an arc of the slot has a radius of curvature as same as the radius of the connecting bar, and the axis of the connecting bar is arranged co-axially with the inner circumferential surface of the slot, each of the fasteners includes a flat groove defined at a outer circumferential surface of the connecting bar, the flat groove is extending along the axis of the connecting bar to an end surface facing a middle part of the connecting bar of a dumbbell plate nearest to the middle part of the connecting bar. The flat grooves of fasteners at the same end are in communication with each other, the outer circumferential surface of the connecting bar facing the dumbbell plates forms connecting parts with openings of the flat grooves, the connecting parts are capable of fastening to the slots, and the connecting parts of the connecting bar depart from the inner walls of the slots while the flat grooves are facing the slots.
Additionally, the angle of two ends of the slot along the arc direction with respect to the center thereof is equal to an angle of two edges of the flat groove along the circumferential direction of the connecting bar about the axis thereof, and a product of the angle of two edges of the flat groove along the circumferential direction of the connecting bar about the axis thereof and a number of the dumbbell plates at the same side is less than 360 degree.
Additionally, the slots facing each other of the dumbbell plates at the same side forms a inserting groove, both ends of the connecting bar are rotatably connected to a hollow inserting plate inserted to inserting groove, a thin wall of the hollow inserting plate has elasticity and toughness, all of the flat grooves at the same side of the connecting bar are provided in the hollow inserting plate, and a stopper detachably connected to the supporting base is provided on the hollow inserting plate.
Additionally, both axial end of the hollow inserting plate along the connecting bar are connected to a hollow cover, and the connecting bar is rotatably connected to the hollow covers.
Additionally, the stopper includes a limiting disk connected to the hollow inserting plate, a plurality of limiting notches are defined on a peripheral of the limiting disk, and a positioning block capable of inserting into the positioning notches is extruded from the top surface of the supporting base.
Additionally, a mounting groove is defined on the end surface of the hollow inserting plate away from the inserting groove, a plurality of through holes corresponding to the dumbbell plates are defined on an inner bottom surface of the mounting groove, a main magnet plate is fixed to the inner bottom surface of the mounting groove, and a plurality of straight holes corresponding to the plurality of through holes are extended through the main magnet plate; the limiting part comprises a mounting plate inserting to the mounting groove, and a plurality of connecting grooves corresponding to the through holes are defined on an end face of the mounting plate facing the inner bottom surface of the mounting groove, the end face of the mounting plate facing the inner bottom surface of the mounting groove is fixed to a sub magnet plate, a plurality of through grooves corresponding to the connecting grooves are extended through the sub magnet plate, a spring is fixed on the inner bottom surface of each of the connecting grooves, and an abutting block is fixed to an end of the spring away from the mounting plate, and the abutting block and the spring are both extending through the straight hole and the through hole. The abutting block is firmly abutted to at least one of the flat grooves via the spring while the connecting bar is fastened into the slots by the connecting parts.
Additionally, a plurality of threaded holes in communication with the plurality of connecting grooves are extending through the mounting plate, each of the threaded holes is connected with a threaded rod, and the threaded rod is extending through the spring and abuts to the abutting block.
Additionally, a plurality of separating grooves for inserting the dumbbell plates are defined on the receiving groove of the supporting base arranged along the axial direction, a peripheral surface of each of dumbbell plates is provided with a section, and the dumbbell plates abut to an inner bottom surface of each of the separating grooves by the sections.
A method of using a weight adjustable dumbbell is also provided, which includes following steps:
Accordingly, the present disclosure has the following beneficial effects:
Since two sides of a top surface of the supporting base both has receiving grooves, a plurality of dumbbell plates opposite to each other can be placed, and by equally placing the dumbbell plates in the receiving grooves corresponding to the both ends of the connecting bar at both ends of the supporting base, the dumbbell plates can be directly mounted to the two ends of the connecting bar. Since the dumbbell plate has a notch, and the notch has slot inside, by aligning the notches and slots of the dumbbell plates at the same time, the both ends of the connecting bar can be inserted into the notches of the dumbbell plates at both ends simultaneously, and the connecting bar is opposite to the slots of the dumbbell plates. Since a plurality of fasteners opposite to the dumbbell plates are set on the connecting bar along the axial direction and are arranged at equal angles about the axis of the connecting bar, while rotating the connecting bar, the fasteners at the same side of the connecting bar can engage with the dumbbell plates one by one, such that the fasteners can be fastened into the slots of the dumbbell plates one by one, therefore, the numbers of the dumbbell plates fastened to the fasteners on the connecting bar can be adjusted by controlling the angle of rotation, further adjusting the weight of the dumbbell. Additionally, the limiting parts detachably connected to the dumbbell can limit the rotation of the connecting bar. Thus, when the number of dumbbell plates fastened to the fasteners reaches the required number, the limiting parts can be mounted to the dumbbell plates, so as to limit the rotation of the connecting bar, such that the department between the fasteners and the slots due to an over-rotation of the connecting bar is avoided, thereby improving the overall stability of the structure of the technical solution. To sum up, the user can place the dumbbell plates on the supporting base, then directly mount the required numbers of dumbbell plates by rotating the connecting bar, so as to reduce handling and is convenient to operate.
1. supporting base; 11. receiving groove; 12. separating groove; 13. positioning block; 2. dumbbell plate; 21. notch; 22. slot; 23. inserting groove; 24. section; 3. connecting bar; 31. flat groove; 32. connecting part; 33. anti-slip rubber cover; 34. limiting disk; 341. positioning notch; 4. hollow inserting plate; 41. hollow cover; 42. mounting groove; 43. through hole; 5. mounting plate; 51. connecting groove; 52 sub magnet plate; 53. spring; 54 abutting block; 55. threaded hole; 56. threaded rod; 561 hexagonal counterbore.
The present disclosure will be further described in detail below with reference to the drawings. The terms “upper”, “inner”, “center”, “left”, “right”, and “one” cited in this specification are only for ease of description and are not intended to limit the scope of the present disclosure. The change or adjustment of the relative relationship of the elements, without substantial changes to the technical content, shall also be regarded as the scope within which the present disclosure can be implemented.
Referring to
Specifically, since two sides of the top surface of the supporting base 1 both has receiving grooves 11, a plurality of dumbbell plates 2 opposite to each other can be placed, and by equally placing the dumbbell plates 2 in the receiving grooves 11 corresponding to the both ends of the connecting bar 3 at both ends of the supporting base 1, the dumbbell plates 2 can be directly mounted to the two ends of the connecting bar 3. Since the dumbbell plate 2 has a notch 21, and the notch 21 has slot 22 inside, by aligning the notches 2 and slots 22 of the dumbbell plates 2 at the same time, the both ends of the connecting bar 3 can be inserted into the notches 2 of the dumbbell plates 2 at both ends simultaneously, and the connecting bar 3 is opposite to the slots 2 of the dumbbell plates 2. Since a plurality of fasteners opposite to the dumbbell plates 2 are set on the connecting bar 3 along the axial direction and are arranged at equal angles about the axis of the connecting bar 3, while rotating the connecting bar 3, the fasteners at the same side of the connecting bar 3 can engage with the dumbbell plates 2 one by one, such that the fasteners can be fastened into the slots 22 of the dumbbell plates 2 one by one, therefore, the numbers of the dumbbell plates 2 fastened to the fasteners on the connecting bar 3 can be adjusted by controlling the angle of rotation, further adjusting the weight of the dumbbell. Additionally, the limiting parts detachably connected to the dumbbell can limit the rotation of the connecting bar 3. Thus, when the number of dumbbell plates 2 fastened to the fasteners reaches the required number, the limiting parts can be mounted to the dumbbell plates 2, so as to limit the rotation of the connecting bar 3, such that the department between the fasteners and the slots 22 due to an over-rotation of the connecting bar is avoided, thereby improving the overall stability of the structure of the illustrated embodiment. To sum up, the user can place the dumbbell plates 2 on the supporting base 1, then directly mount the required numbers of dumbbell plates 2 by rotating the connecting bar 3, so as to reduce handling and is convenient to operate.
Referring to
Specifically, during the flat grooves 31 are gradually facing the slots 22 of the dumbbell plates 2, the connecting parts 32 of the connecting bar 3 depart from the corresponding slot 2 of the dumbbell plate 2, such that the fastener departs from the slot 22. Also, since the dumbbell plates 2 are arranged along the axial direction, and the slots 22 and the notches 21 of adjacent dumbbell plates 2 are aligned with each other, so as to ensure that the connecting parts 32 of the connecting bar 3 can be fastened to the corresponding slots 22 sequentially by rotating the connecting bar 3 while the slots 22 not opposite to the connecting parts 32 don't fasten to the connecting parts 32, flat grooves 31 are set on the outer surface of the connecting bar 3, and the flat grooves 31 are extending to the outer surface of the dumbbell plate 2 nearest to the middle of the connecting bar 3. Thus, the mounting order of the dumbbell plates 2 at the same side can be defined as sequentially mounting from the outer part to the inner part. More specifically, if the flat groove 31 corresponding to the outermost dumbbell plate 2 is opposite to the slot 22, all of the slots 22 cannot be fastened to the connecting parts 32. Similarly, if the flat groove 31 corresponding to the dumbbell plate 2 in the middlemost of the connecting bar 3 is opposite to the slot 22, only the slot 22 in the middlemost of the connecting bar 3 cannot be fastened to the corresponding connecting part 32. It can be seen that, by setting the flat grooves 31 along the spiral direction, and by controlling the length of the flat grooves 31 extending in the axial direction, the number of departing the connecting parts 32 and the flat grooves 31 is controlled. In other words, the number of the connecting parts 32 and the slots 22 engaged can be controlled.
So as to control the depth of the flat grooves 31, so as to prevent the situation that the outer surface of the connecting bar 3 corresponding to the dumbbell plate 2 at the most middle part thereof cannot form a connecting part 32 between the corresponding float 31: the angle of two ends of the slot 22 along the arc direction with respect to the center thereof is equal to an angle of two edges of the flat groove 31 along the circumferential direction of the connecting bar 3 about the axis thereof, in the illustrated embodiment, angle of two edges of the flat groove 31 along the circumferential direction of the connecting bar 3 about the axis thereof is 72 degree. And a product of the angle of two edges of the flat groove 31 along the circumferential direction of the connecting bar 3 about the axis thereof and the number of the dumbbell plates 2, which is 2 in the illustrated embodiment, at the same side is less than 360 degree. Specifically, since the arc of the slot 22 is co-axially set to the connecting bar 3, by limiting the angle degrees of the arc of the slot 22 and the flat groove 31 corresponding to the connecting bar 3, the plurality of flat grooves 31 on the connecting bar 3 have equal angles, such that each of the connecting part 32 can be engaged with a slot 22 by rotating the same angle. Additionally, since the product of the angle of two edges of the flat groove 31 along the circumferential direction of the connecting bar 3 about the axis thereof and the number of the dumbbell plates 2, which is 2 in the illustrated embodiment, at the same side is less than 360 degree, the depth of the flat grooves 31 is controlled, so as to prevent the situation that the outer surface of the connecting bar 3 corresponding to the dumbbell plate 2 at the most middle part thereof cannot form a connecting part 32 between the corresponding float 31 if the flat grooves 31 is too deep. So as to achieve the beneficial effect of improving the overall structure, using scientifically, and precise calculation constraints.
Referring to
Specifically, since the connecting bar 3 are rotatably connected to the hollow inserting plate 4 inserted to inserting groove 23, and a stopper is connected to the hollow inserting plate 4, the stopper is detachably connected to the supporting base 1, such that the rotation of the hollow inserting plate 4 and the dumbbell plates 2 and the mismatch is limited, further improving the effectiveness of the rotation of the connecting bar. Since the thin wall of the hollow inserting plate 4 has elasticity and toughness, while the connecting parts 32 are engaging to the slots 22 in the rotation of the connecting bar 3, the connecting parts 32 insert into the thin walls of the hollow inserting plate 4 and co-axially fasten into the corresponding slots 23. Also, the thin wall of the hollow inserting plate 4 can increase the friction between the connecting parts 32 and the slots 23, preventing the connecting parts 32 departing from the slots 23.
In order to further prevent the dumbbell plates 2 axially falling from the connecting bar 3, both axial end of the hollow inserting plate 4 along the connecting bar 3 are connected to a hollow cover 41, and the hollow cover 41 is in communication with the hollow inserting plate 4, such that the hollow inserting plate 4 forms an integrated structure, which can be processed through extrusion and injection molding processes, thereby realizing the convenience of processing.
Referring to
Additionally, a mounting groove 42 is defined on the end surface of the hollow inserting plate 4 away from the inserting groove 23, four through holes 43 corresponding to four the dumbbell plates 2 are defined on an inner bottom surface of the mounting groove 42. A main magnet plate (not shown) is fixed to the inner bottom surface of the mounting groove 42, and four straight holes (not shown) corresponding to the four through holes 43 are extended through the main magnet plate. The limiting part includes a mounting plate 5 inserting to the mounting groove 42, and four connecting grooves 51 corresponding to the four through holes 43 are defined on the end face of the mounting plate 5 facing the inner bottom surface of the mounting groove 42, the end face of the mounting plate 5 facing the inner bottom surface of the mounting groove 42 is fixed to a sub magnet plate 52, and four through grooves (not shown) corresponding to the connecting grooves 51 are extended through the sub magnet plate 52. A spring 53 is fixed on the inner bottom surface of each of the connecting grooves 51, and an abutting block 54 is fixed to the end of the spring 53 away from the mounting plate 5, the abutting block 54 can be a steel post or a steel bead, and the abutting block 54 and the spring 53 are both extending through the straight hole and the through hole 43. The abutting block 54 is firmly abutted to at least one of the flat grooves 31 by the spring 53 while the connecting bar 3 is fastened into t 22he slots by the connecting parts 32.
Specifically, if one flat groove 31 is facing one through hole 43, the connecting part 43 corresponding to the flat groove 31 may still partly engage with the slot 22, which means, this dumbbell plates 2 can still be fixed to the connecting bar 3 at least if part surface of the connecting part 32 is abutting to the inner wall of the slot 22. Therefore, during operation, the flat groove 31 of the dumbbell plate 2 required to be mounted is facing the through hole 43, and the connecting part 32 corresponding to this flat groove 31 is engaged with the slot 22 of this dumbbell plate 2, the mounting plate 5 is attached to the main magnet plate by the sub magnet plate, then the mounting plate 5 is inserted into the mounting groove 42, at the same time the four springs 53 and abutting blocks 54 are extending the four through holes. With the attachment between the main magnet plate and the sub magnet plate 52, the abutting blocks 54 are abutting to the surface of the connecting bar 3 by the pusing of the springs 53, and at least one abutting block is abutting the inner wall of one of the flat grooves 31, so as to limit the rotation of the connecting bar 3.
Referring to
In order to stably place the dumbbell plates 2 into the receiving groove 11 and keep a stable sate, a plurality of separating grooves 12 for inserting the dumbbell plates 2 are defined on the receiving groove 11 of the supporting base 1 arranged along the axial direction, a peripheral surface of each of dumbbell plates 2 is provided with a section 24, and the dumbbell plates 2 abut to the inner bottom surface of each of the separating grooves 12 by the sections 24.
An anti-slip rubber cover 33 is fixed to the surface of the connecting bar 3 between the two limiting disks 34, so as to increase the friction of the surface of the connecting bar 3 for a better gripping.
A method of using a weight adjustable dumbbell is also provided, which includes following steps:
By taking the above-mentioned method, the user can place the dumbbell plates 2 on the supporting base 1, then directly mount the required numbers of dumbbell plates 2 by rotating the connecting bar 3, so as to reduce handling and is convenient to operate.
The detailed embodiments are merely an explanation of the present disclosure, but not a limitation. And those skilled in the art may, after reading the specification, make modifications to the embodiments as necessary without contributing to the inventive step, provided that they are protected by patent law within the scope of the claims.
Number | Date | Country | Kind |
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202120351554.1 | Feb 2021 | CN | national |
This application is a continuation of U.S. application Ser. No. 17/235,953, entitled “WEIGHT ADJUSTABLE DUMBBELL AND USING METHOD THEREOF,” filed Apr. 21, 2021, and the entire contents of which are incorporated herein by reference.
Number | Date | Country | |
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Parent | 17235953 | Apr 2021 | US |
Child | 18590464 | US |