Shaftless weight-adjustable fitness equipment
Through the shaftless design of locking grooves, locking hooks and locking tongue structures, the existing dumbbell or barbells are complicated in weight adjustment and physical energy consumption, and rapid and labor-saving weight adjustment is achieved, reducing production costs and improving service life.
Patent Information
- Application Number
- CN202510619192.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2025-08-01
AI Technical Summary
When adjusting weight, existing dumbbells or barbells have complex structure, difficult manufacturing, high production costs, and complex disassembly and assembly operations, and consume high physical strength, making it difficult to quickly match the required medium weight.
The shaftless design is adopted, and the second counterweight block is quickly assembled and disassembled through the cooperation of the lock groove, lock hook and lock tongue. The locking structure of the lock arm and lock tongue is used to automatically lock and unlock, simplifying the weight adjustment process.
It realizes weight adjustment with simple structure, low production cost, and rapid disassembly and assembly, saves time and effort, gives users a pleasant experience, and the accessories are stable and long service life, which is suitable for promotion and application.
Smart Images
Figure CN120393355A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of fitness equipment, and particularly relates to a fitness equipment with shaftless adjustable weight. Background Art
[0002] With the improvement of people's living quality, more and more people participate in fitness exercises. Commonly used fitness equipment includes dumbbells and barbells. For higher-grade dumbbells or barbells, the weight of the counterweight blocks on the main shaft is adjusted by rotating the handle. Its disadvantages are as follows: complex structure, many accessories, difficult manufacturing, and high production cost; there are also some dumbbells or barbells without a main shaft, and their disadvantages are as follows: complex disassembly and assembly operations, large physical consumption, and inconvenient for quickly matching the medium body weight of the dumbbells or barbells required for exercise. Summary of the Invention
[0003] The purpose of the present invention is to provide a shaftless adjustable weight fitness equipment with a simple structure, low production cost, and capable of quickly disassembling and assembling to adjust the weight in a time-saving and labor-saving manner.
[0004] The purpose of the present invention is solved as follows: A shaftless adjustable weight fitness equipment includes a handle and first counterweight blocks symmetrically fixed at both ends of the handle. A second counterweight block is clamped on the first counterweight block. A first locking groove is arranged at the lower part of one end face of the second counterweight block, and a locking hook capable of being matched and positioned with the first locking groove is arranged at the lower part of the other end face. A second locking groove is arranged at the upper part of the end face of the second counterweight block with the first locking groove, and a locking arm capable of being matched and positioned with the second locking groove is arranged at the other end face. A locking hole is arranged on the locking arm. An upper part of the second locking groove is provided with a first locking tongue elastically extending into the second locking groove and being matched with the locking hole on the locking arm to lock the locking arm. The lower part of the outer end face of the first counterweight block is provided with the first locking groove, and the upper part is provided with the second locking groove. An upper part of the second locking groove is provided with a first locking tongue elastically extending into the second locking groove and being matched with the locking hole on the locking arm to lock the locking arm. The second locking groove is an arc-shaped groove, and the locking arm is an arc-shaped body capable of being matched and clamped with the arc-shaped groove. After the locking hook of one second counterweight block extends into the first locking groove of the first counterweight block or another second counterweight block, the second counterweight block can be rotated so that the locking arm on the second counterweight block is clamped into the second locking groove of the first counterweight block or another second counterweight block. When the locking arm pushes the first locking tongue to move upward and the locking arm is completely clamped into the second locking groove, the first locking tongue is clamped into the locking hole of the locking arm.
[0005] As a further optimization of the above technical solution, the first locking groove has a transverse groove, and a downward concave vertical groove is arranged inside the transverse groove. The locking hook has a transverse arm arranged at the lower part of the other end face of the second counterweight block and a second locking tongue extending downward at the outer end of the transverse arm. The outer diameter of the transverse groove is greater than or equal to the diameter of the second locking tongue.
[0006] As a further optimization of the above technical solution, the second locking tongue is a spherical body, and the diameter of the spherical body is greater than the diameter of the cross arm.
[0007] As a further optimization of the above technical solution, the first locking groove is a T-shaped groove, and a downward concave vertical groove with the same width as the "horizontal groove" of the T-shaped groove is arranged inside the T-shaped groove. The locking hook is a T-shaped body that matches the T-shaped groove and lies flat. When the "horizontal part" of the T-shaped body of one of the second counterweight blocks extends into the bottom of the horizontal groove of the T-shaped groove of the first counterweight block or another second counterweight block and drops to the bottom of the vertical groove, the "vertical part" of the T-shaped body is caught in the "vertical groove" of the T-shaped groove.
[0008] As a further optimization of the above technical solution, there are two or more even numbers of the second counterweight blocks.
[0009] As a further optimization of the above technical solution, the upper and lower arc surfaces of the arc groove are arc surfaces formed with the midpoint of the outer end of the lower wall of the first locking groove as the center of the circle and the lengths from the midpoint of the outer end of the lower wall to the highest point of the upper wall and the lowest point of the lower wall of the second locking groove as the radii respectively. So that after the locking hook of the second counterweight block extends into the first locking groove of the first counterweight block or another second counterweight block, it rotates with the midpoint of the outer end of the lower wall of the first locking groove as the fulcrum and makes the locking arm of the second counterweight block extend into the second locking groove of the first counterweight block or another second counterweight block to lock, so as to realize the axial positioning of the second counterweight block.
[0010] As a further optimization of the above technical solution, upward first grooves are arranged on the inner upper walls of the second locking grooves of the first counterweight block and the second counterweight block. Corresponding to the first grooves, downward concave second grooves are arranged on the upper surfaces of the first counterweight block and the second counterweight block. A communication hole is arranged between the first groove and the second groove. The lower part of the first locking tongue extends into the second locking groove, the middle part is located in the first groove, the upper part passes through the communication hole and extends into the second groove and is provided with a hand-held part. A spring seat is arranged on the lower side of the first locking tongue in the first groove, and a return spring for driving the first locking tongue to extend downward is sleeved on the first locking tongue in the first groove above the spring seat.
[0011] As a further optimization of the above technical solution, the second groove is a semi-circular groove or a strip-shaped groove, the hand-held part is a semi-circular ring, and gaps through which fingers can extend into the semi-circular ring are arranged on both sides of the semi-circular ring.
[0012] As a further optimization of the above technical solution, a positioning groove is provided on the end face of the second counterweight block with a locking hook, and a positioning protrusion that can be matched and positioned with the positioning groove is provided on the other end face. The positioning protrusion is a cylinder or a prism with arc-shaped surfaces on both the upper and lower sides, and the positioning groove is a groove that can be matched and positioned with the cylinder or the prism; a positioning protrusion that is matched and positioned with the positioning groove is provided on the outer end face of the first counterweight block, and the arc-shaped surface of the positioning protrusion is an arc-shaped surface formed with the center of the outer end of the lower wall of the first locking groove as the center of the circle and with the distances from the center to the highest point of the upper wall and the lowest point of the lower wall of the positioning protrusion as the radii respectively.
[0013] As a further optimization of the above technical solution, the middle part of the handle is an arc-shaped body that is convenient for holding by hand or evenly distributed anti-slip protrusions that are convenient for holding by hand.
[0014] The positive effects of the present invention compared with the prior art are as follows: After the locking hook of a second counterweight block of the present invention is obliquely clamped into the first locking groove of the first counterweight block or another second counterweight block (see Figure 7 ), straighten this second counterweight block, and the locking arm of the second counterweight block can be directly clamped into the second locking groove of the first counterweight block or another second counterweight block to achieve automatic locking (the first locking tongue is a snap-lock structure, which is convenient for automatic locking), realizing the rapid assembly of the second counterweight block; for disassembly, lift the hand-held part of the first locking tongue, and the first locking tongue can be disengaged from the locking hole of the locking arm to unlock. Relying on the unstable center of gravity of the unlocked second counterweight block or applying a slight external force, the second counterweight block can be rotated, and then slightly lift the second counterweight block to make the locking hook disengage from the first locking groove, and then the second counterweight block can be removed, realizing the rapid disassembly of the second counterweight block. If there are multiple second counterweight blocks clamped outside this second counterweight block, unlock the innermost second counterweight block, and slightly lift the handle on this side to make the locking hook of this second counterweight block disengage from the first locking groove to disassemble multiple second counterweight blocks, which is time-saving, labor-saving, fast, and gives people a pleasant experience of adjusting the weight.
[0015] Since the present invention does not need to lift the second counterweight block to be disassembled and assembled when disassembling, assembling and adjusting the weight, it can quickly disassemble and assemble the second counterweight block within a small height, and after the locking hook of the second counterweight block can be inserted into the first locking groove, there is no need to lift the locking hook of the second counterweight block out of the first locking groove with force. Compared with the prior art, when disassembling and assembling, it is necessary to lift the second counterweight block relatively high, and a large amount of effort and time are saved for long-term alignment and adjustment, which is time-saving, labor-saving and fast.
[0016] The structure of the present invention is simple, with few accessories, the performance of the accessories is stable, it is not easy to be damaged, it has a long service life, it is easy to manufacture, the production cost is low, the overall price is low, and it is convenient for popularization and application. Description of the Drawings
[0017] Figure 1It is a cross-sectional view of the present invention.
[0018] Figure 2 It is the front view of the second counterweight of the present invention.
[0019] Figure 3 It is the cross-sectional view of the second counterweight of the present invention.
[0020] Figure 4 It is Figure 1 the enlarged view of part A of
[0021] Figure 5 It is Figure 1 the enlarged view of part B of
[0022] Figure 6 It is Figure 3 the enlarged view of part C of
[0023] Figure 7 It is the enlarged partial cross-sectional view when the second counterweight of the present invention starts to be assembled. Detailed implementation manners
[0024] The present invention will be further described below with specific embodiments in conjunction with the accompanying drawings. Refer to Figures 1-7 : A fitness equipment with a shaftless adjustable weight, including a handle 10 and first counterweight blocks 20 symmetrically fixed at both ends of the handle 10. A second counterweight block 30 is clamped on the first counterweight block 20. At the lower part of one end face of the second counterweight block 30, a first locking groove 36 is provided, and at the lower part of the other end face, a locking hook 32 that can be matched and positioned with the first locking groove 36 is provided. At the upper part of the end face of the second counterweight block 30 with the first locking groove 36, a second locking groove 34 is provided, and on the other end face, a locking arm 37 that can be matched and positioned with the second locking groove 34 is provided. A locking hole 371 is provided on the locking arm 37. At the upper part of the second locking groove 34, a first locking tongue 33 that elastically extends into the second locking groove 34 and is matched with the locking hole 371 on the locking arm 37 to lock the locking arm 37 is provided. At the lower part of the outer end face of the first counterweight block 20, the first locking groove 36 is provided, and at the upper part, the second locking groove 34 is provided. At the upper part of the second locking groove 34, a first locking tongue 33 that elastically extends into the second locking groove 34 and is matched with the locking hole 371 on the locking arm 37 to lock the locking arm 37 is provided. The second locking groove 34 is an arc-shaped groove, and the locking arm 37 is an arc-shaped body that can be matched and clamped with the arc-shaped groove. After the locking hook 32 of one second counterweight block 30 extends into the first locking groove 36 of the first counterweight block 20 or another second counterweight block 30, the second counterweight block 30 can be rotated so that the locking arm 37 on the second counterweight block 30 is clamped into the second locking groove 34 of the first counterweight block 20 or another second counterweight block 30. When the locking arm 37 pushes the first locking tongue 33 to move upward and the locking arm 37 is completely clamped into the second locking groove 34, the first locking tongue 33 is clamped into the locking hole 371 of the locking arm 37.
[0025] As a further optimization of the above technical solution, the first locking groove 36 has a transverse groove 361, and a downward concave vertical groove 362 is provided inside the transverse groove 361. The locking hook 32 has a transverse arm 321 provided at the lower part of the other end face of the second counterweight block 30 and a second locking tongue 322 extending downward at the outer end of the transverse arm 321. The outer diameter of the transverse groove 361 is greater than or equal to the diameter of the second locking tongue 322.
[0026] As a further optimization of the above technical solution, the second locking tongue 322 is a spherical body, and the diameter of the spherical body is greater than the diameter of the transverse arm 321. Using the spherical second locking tongue 322 can quickly dock and position with the first locking groove 36, saving time and the effort of grasping the second counterweight block 30 for a long time.
[0027] As a further optimization of the above technical solution, the first locking groove 36 is a T-shaped groove, and a downward concave vertical groove with the same width as the "horizontal groove" of the T-shaped groove is provided inside the T-shaped groove. The locking hook 32 is a T-shaped body that matches the T-shaped groove and lies flat. When the "horizontal part" of the T-shaped body of one of the second counterweight blocks 30 extends into the bottom of the horizontal groove of the T-shaped groove of the first counterweight block 20 or another second counterweight block 30 and drops to the bottom of the vertical groove, the "vertical part" of the T-shaped body is caught in the "vertical groove" of the T-shaped groove.
[0028] As a further optimization of the above technical solution, there are two or more even numbers of the second counterweight blocks 30.
[0029] As a further optimization of the above technical solution, the upper and lower arc surfaces 341 and 342 of the arc groove are arc surfaces formed with the midpoint 363 of the outer end of the lower wall of the first locking groove 36 as the center of the circle and with the lengths from the midpoint 363 of the outer end of the lower wall to the highest point of the upper wall and the lowest point of the lower wall of the second locking groove 34 as the radii respectively. After the locking hook 32 of the second counterweight block 30 extends into the first locking groove 36 of the first counterweight block 20 or another second counterweight block 30, it rotates with the midpoint 363 of the outer end of the lower wall of the first locking groove 36 as the fulcrum, and the locking arm 37 of the second counterweight block 30 extends into the second locking groove 34 of the first counterweight block 20 or another second counterweight block 30 to lock, so as to realize the axial positioning of the second counterweight block 30.
[0030] As a further optimization of the above technical solution, upward first grooves 39 are provided on the inner upper walls of the second locking grooves 34 of the first counterweight block 20 and the second counterweight block 30. The upper surfaces of the first counterweight block 20 and the second counterweight block 30 corresponding to the first grooves 39 are both provided with downward concave second grooves 40. Communication holes 41 are provided between the first grooves 39 and the second grooves 40. The lower part 331 of the first locking tongue 33 extends into the second locking groove 34, the middle part 333 is located in the first groove 39, the upper part 334 passes through the communication hole 41 and extends into the second groove 40 and is provided with a hand-held part 335. A spring seat 332 is provided on the lower side of the first locking tongue 33 in the first groove 39. A return spring 38 for driving the first locking tongue 33 to extend downward is sleeved on the first locking tongue 33 in the first groove 39 above the spring seat 332.
[0031] As a further optimization of the above technical solution, the second groove 40 is a semi-circular groove or a strip-shaped groove, the hand-held part 335 is a semi-circular ring, and gaps are provided on both sides of the semi-circular ring for fingers to extend into the semi-circular ring.
[0032] As a further optimization of the above technical solution, a positioning groove 31 is provided on the end face of the second counterweight 30 with a locking hook 32, and a positioning protrusion 35 that can be matched and positioned with the positioning groove 31 is provided on the other end face. The positioning protrusion 35 is a column with arc-shaped surfaces on both the upper and lower sides. The column is a cylinder or a polyhedron, and the positioning groove 31 is a groove that can be matched and positioned with the column. A positioning protrusion 35 that is matched and positioned with the positioning groove 31 is provided on the outer end face of the first counterweight 20. The arc-shaped surface of the positioning protrusion 35 is an arc-shaped surface formed with the center 363 at the outer end of the lower wall of the first locking groove 36 as the center of the circle, and with the distances from the center to the highest point of the upper wall and the lowest point of the lower wall of the positioning protrusion 35 as the radii respectively.
[0033] As a further optimization of the above technical solution, the middle part of the handle 10 is an arc-shaped body convenient for hand-holding or evenly distributed anti-slip protrusions convenient for hand-holding.
[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still make simple substitutions or modifications to the technical solutions or technical features recorded in the foregoing embodiments with similar technologies. These simple substitutions or modifications do not cause the essence of the corresponding technical solutions to deviate from the spirit and essence of the technical solutions of the various embodiments of the present invention, and are still within the protection scope of the present invention.
Claims
1. A fitness equipment with a shaftless adjustable weight, comprising a handle and first counterweights symmetrically fixed at both ends of the handle, characterized in that: A second counterweight block is clamped on the first counterweight block. A first locking groove is provided at the lower part of one end face of the second counterweight block, and a locking hook that can be matched and positioned with the first locking groove is provided at the lower part of the other end face. A second locking groove is provided at the upper part of the end face of the second counterweight block with the first locking groove, and a locking arm that can be matched and positioned with the second locking groove is provided at the other end face. A locking hole is provided on the locking arm. An upper part of the second locking groove is provided with a first locking tongue that elastically extends into the second locking groove and is matched with the locking hole on the locking arm to lock the locking arm. A lower part of the outer end face of the first counterweight block is provided with the first locking groove, and an upper part is provided with the second locking groove. An upper part of the second locking groove is provided with a first locking tongue that elastically extends into the second locking groove and is matched with the locking hole on the locking arm to lock the locking arm. The second locking groove is an arc-shaped groove, and the locking arm is an arc-shaped body that can be matched and clamped with the arc-shaped groove. After the locking hook of one second counterweight block extends into the first locking groove of the first counterweight block or another second counterweight block, the second counterweight block can be rotated so that the locking arm on the second counterweight block is clamped into the second locking groove of the first counterweight block or another second counterweight block. After the locking arm pushes the first locking tongue to move upward and the locking arm is completely clamped into the second locking groove, the first locking tongue is clamped into the locking hole of the locking arm.
2. The fitness equipment with a shaftless adjustable weight according to claim 1, characterized in that: The first locking groove has a horizontal groove, and a downward concave vertical groove is provided inside the horizontal groove. The locking hook has a horizontal arm provided at the lower part of the other end face of the second counterweight block and a second locking tongue extending downward at the outer end of the horizontal arm. The outer diameter of the horizontal groove is greater than or equal to the diameter of the second locking tongue.
3. The fitness equipment with a shaftless adjustable weight according to claim 2, characterized in that: The second locking tongue is a spherical body, and the diameter of the spherical body is greater than the diameter of the horizontal arm.
4. The fitness equipment with a shaftless adjustable weight according to claim 1, characterized in that: The first locking groove is a T-shaped groove, and a downward concave vertical groove equal in width to the "horizontal groove" of the T-shaped groove is provided inside the T-shaped groove. The locking hook is a T-shaped body that matches the T-shaped groove and is placed flat. When the "horizontal part" of the T-shaped body of one second counterweight block extends into the bottom of the horizontal groove of the T-shaped groove of the first counterweight block or another second counterweight block and drops to the bottom of the vertical groove, the "vertical part" of the T-shaped body is clamped into the "vertical groove" of the T-shaped groove.
5. The fitness equipment with a shaftless adjustable weight according to claim 1, characterized in that: There are two or more even numbers of the second counterweight blocks.
6. The fitness equipment with a shaftless adjustable weight according to claim 1, characterized in that: The upper and lower arc-shaped surfaces of the arc-shaped groove are arc-shaped surfaces formed with the midpoint of the outer end of the lower wall of the first locking groove as the center of the circle and with the lengths from the midpoint of the outer end of the lower wall to the highest point of the upper wall and the lowest point of the lower wall of the second locking groove as the radii, so that after the locking hook of the second counterweight block extends into the first locking groove of the first counterweight block or another second counterweight block, it can be rotated with the midpoint of the outer end of the lower wall of the first locking groove as the fulcrum and the locking arm of the second counterweight block can be extended into the second locking groove of the first counterweight block or another second counterweight block for locking, so as to realize the axial positioning of the second counterweight block.
7. The fitness equipment with a shaftless adjustable weight according to claim 1, wherein: On the inner upper wall of the second locking groove of the first counterweight block and the second counterweight block, there is an upward first groove. On the upper surfaces of the first counterweight block and the second counterweight block corresponding to the second locking groove, there are downward concave second grooves. A communication hole is provided between the first groove and the second groove. The lower part of the first locking tongue extends into the second locking groove, the middle part is located in the first groove, the upper part passes through the communication hole and extends into the second groove and is provided with a hand-held part. A spring seat is arranged on the lower side of the first locking tongue in the first groove. A return spring for driving the first locking tongue to extend downward is sleeved on the first locking tongue in the first groove above the spring seat.
8. A fitness equipment with a shaftless adjustable weight according to claim 7, characterized in that: The second groove is a semi-circular groove or a strip-shaped groove. The hand-held part is a semi-circular ring or a circular ring or an oval ring. There are gaps on both sides of the semi-circular ring or the circular ring or the oval ring through which fingers can extend into the semi-circular ring or the circular ring or the oval ring.
9. A fitness equipment with a shaftless adjustable weight according to any one of claims 1-8, characterized in that: On the end face of the second counterweight block with a locking hook, there is a positioning groove, and on the other end face, there is a positioning protrusion that can be matched and positioned with the positioning groove. The positioning protrusion is a cylinder or a prism with arc-shaped surfaces on both the upper and lower sides. The positioning groove is a groove that can be matched and positioned with the cylinder or the prism. On the outer end face of the first counterweight block, there is the positioning protrusion that can be matched and positioned with the positioning groove. The arc-shaped surface of the positioning protrusion is an arc-shaped surface formed with the center of the outer end of the lower wall of the first locking groove as the center of the circle and with the distances from the center to the highest point of the upper wall and the lowest point of the lower wall of the positioning protrusion as the radii respectively.
10. A fitness equipment with a shaftless adjustable weight according to any one of claims 1-8, characterized in that: The middle part of the handle is an arc-shaped body convenient for holding by hand or evenly distributed anti-slip protrusions convenient for holding by hand.