Integrated dumbbell capable of automatically replacing pieces
By using an automatic plate-changing integrated dumbbell structure, and utilizing a rotating grip to drive the telescopic rod's extension and retraction and the indexing extension component, the problem of complex traditional dumbbell plate adjustment is solved, enabling fast and labor-saving plate adjustment, improving user experience and reducing costs.
Patent Information
- Application Number
- CN202423250951.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Traditional dumbbells are complicated, time-consuming, and laborious to change and adjust the weight plates, which affects the user experience.
It adopts an automatic plate-changing integrated dumbbell structure. The rotating grip drives the spiral drive groove to extend and retract the telescopic bar. Combined with the indexing telescopic component and the plate fixing component, it can realize the quick replacement and fixation of the plates.
It enables rapid adjustment of the number of spools, simplifies operation, improves user experience, reduces costs, maintains gravity balance, reduces size, and enhances safety.
Smart Images
Figure CN223944852U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to an automatic piece changing type integrated dumbbell convenient to adjust bell piece. BACKGROUND
[0002] The traditional dumbbell is provided with bell pieces sleeved on both ends of the handle, and the bell pieces are pressed by the threaded end cap sleeved on both ends of the handle, so that when the bell pieces need to be replaced, the threaded end cap is removed, and the number of bell pieces is disassembled according to the user's own needs, and the bell pieces are fixed by tightening the threaded end cap after adjustment. The structure of such a dumbbell is too simple, the operation of adjusting the bell pieces is complex, time-consuming and laborious, and the efficiency is low, thereby affecting the user's experience. SUMMARY
[0003] The automatic piece changing type integrated dumbbell provided by the utility model solves the above-mentioned technical problems, and specifically adopts the following technical scheme:
[0004] An automatic piece changing type integrated dumbbell comprises a dumbbell and a base for limiting and placing the whole dumbbell, both ends of the base are respectively provided with a support piece for limiting and placing the bell pieces at both ends of the dumbbell and a positioning piece for positioning and placing the dumbbell, a placing space for placing a plurality of bell pieces is formed between the support piece and the positioning piece, the dumbbell comprises a handle, two telescopic rods for supporting a plurality of bell pieces at the end of the dumbbell are telescopically installed in the handle, a spiral driving groove for driving the telescopic rods to telescopically extend is formed in the inside of the handle, a driving protrusion for cooperating with the spiral driving groove is formed on the outer periphery of the telescopic rod, a through hole for inserting the telescopic rod is formed in the center of the plurality of bell pieces, both ends of the handle are respectively provided with a graduated telescopic assembly for limiting the linear motion of the two telescopic rods and allowing the telescopic rods to telescopically extend by degrees so that the telescopic rods rotate every degree and correspond to a bell piece position, and the telescopic rod is provided with a bell piece fixing assembly for being driven by the graduated telescopic assembly to fix the bell piece when the telescopic rod is prevented from telescopically extending or being driven by the graduated telescopic assembly to release the bell piece when the telescopic rod is allowed to telescopically extend.
[0005] Further, the indexing telescopic assembly comprises a flange plate rotatably connected to the end of the handle and a indexing ring fixed to the end of the handle and embedded inside the flange plate; a plurality of indexing holes evenly distributed in the circumference of the indexing ring are provided with indexing pins; the interior of the handle is formed with a helical driving groove for driving the telescopic rod to extend and retract; the outer circumference of the telescopic rod is formed with a driving protrusion for matching the helical driving groove; the flange plate is formed with positioning holes for the insertion of the indexing pins to prevent the telescopic rod and the handle from rotating relative to each other; the indexing pins are provided with springs for inserting the pin heads of the indexing pins into the positioning holes; the positioning piece is provided with release pins for inserting into the positioning holes when the dumbbell is placed on the positioning piece to push the indexing pins out of the positioning holes; the flange plate is installed with an L-shaped guide seat for limiting the linear motion of the telescopic rod; the telescopic rod is formed with a guide groove for matching the L-shaped guide seat; the L-shaped guide seat is formed with a hole in which a push rod is slidingly arranged; the push rod moves between a position of being inserted into the indexing hole and a position of being separated from the indexing hole and retracted into the hole formed in the L-shaped guide seat.
[0006] Further, the indexing telescopic assembly further comprises a character ring and a compression cover; the character ring is sleeved on the outer circumference of the end of the handle and a gap is formed between the character ring and the handle; the compression cover is sleeved on the outer circumference of the handle and is compressed in the gap to fix the character ring to the end of the handle; the compression cover, the character ring and the indexing ring are fixed as a whole by a plurality of screws.
[0007] Further, part of the flange plate is sleeved on the outer circumference of the indexing ring, and a stop ring is further arranged between the flange plate and the indexing ring for limiting the axial position of the flange plate and the indexing ring.
[0008] Further, the helical driving groove is a helical groove with an arc-shaped inner wall; the driving protrusion is composed of a steel ball rollingly embedded on the outer wall of the telescopic rod.
[0009] Further, the dumbbell piece fixing assembly comprises a rotating shaft rotatably arranged in the interior of the telescopic rod; the end of the rotating shaft away from the handle is fixed with a cam; the end of the telescopic rod away from the handle is provided with a catch pin; the through hole of the dumbbell piece is provided with a catch groove for the insertion of the catch pin; the catch pin is telescopically arranged in a sliding hole formed in the end of the telescopic rod by an elastic member; a torsional spring is arranged between the end of the rotating shaft away from the cam and the inner wall of the telescopic rod for driving the convex part of the cam to push out the catch pin; one end of the push rod is connected to the rotating shaft for pushing the rotating shaft to rotate when the push rod is pushed out of the indexing hole, so that the convex part of the cam is misaligned with the catch pin, causing the catch pin to retract into the sliding hole.
[0010] Further, the rotating shaft is formed with a pushing flange for contacting the push rod; the upper end of the push rod is provided with an arc-shaped push rod abutting against the pushing flange and arranged in close contact with the rotating shaft.
[0011] Further, the end of the telescopic rod is provided with a plurality of clamping pins in the circumferential direction; the cam is provided with a plurality of convex portions and concave portions arranged at intervals in the circumferential direction; each clamping pin moves between contacting the corresponding convex portion and the corresponding concave portion.
[0012] Further, the base is provided with two support shafts for supporting the limiting bell piece from two sides of the bell piece; the two support shafts penetrate the support piece and the positioning piece from two sides of the support piece and the positioning piece.
[0013] Further, the positioning piece is provided with a recess for clamping the flange plate; the recess is provided with a release pin.
[0014] The automatic disc changing integrated dumbbell has the advantages that the automatic disc changing integrated dumbbell is rotated to drive the telescopic rod to linearly extend and retract along the inside of the handle rod under the structure limitation of the indexing telescopic assembly, one end of the telescopic rod is inserted with the required number of bell pieces, the bell pieces inserted on the outer periphery of the telescopic rod are fixed by the bell piece fixing assembly, the number of the bell pieces of the dumbbell can be quickly changed, the bell pieces do not need to be disassembled and assembled, the adjusting structure is simple, the efficiency is high, time and labor are saved, and the use experience of users is effectively improved. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0016] Figure 1 is a schematic view of the automatic disc changing integrated dumbbell in the utility model;
[0017] Figure 2 is Figure 1 is a schematic view of the internal structure of the end of the limiting plate of the automatic disc changing integrated dumbbell in the utility model;
[0018] Figure 3 is Figure 1 is a schematic view of the indexing telescopic assembly and the bell piece fixing assembly of the automatic disc changing integrated dumbbell in the utility model;
[0019] Figure 4 is Figure 1 is a schematic view of the local structure of the indexing telescopic assembly and the bell piece fixing assembly of the automatic disc changing integrated dumbbell in the utility model;
[0020] Figure 5 is Figure 1 is a schematic view of the mounting structure of the rotating shaft and the torsion spring of the automatic disc changing integrated dumbbell in the utility model;
[0021] Figure 6 is a sectional view of the automatic film-changing integrated dumbbell in Figure 1
[0022] Figure 7 is an exploded view of the automatic film-changing integrated dumbbell in Figure 1
[0023] Figure 8 is a schematic view of the base of the automatic film-changing integrated dumbbell in Figure 1
[0024] Dumbbell 10, bell piece 11, through hole 111, clamping groove 112, handle 12, screw drive groove 121, telescopic rod 13, guide groove 131, movable protrusion 132, sliding hole 133, flange plate 14, positioning hole 141, L guide seat 15, indexing ring 16, indexing pin 17, character code ring 18, compression cover 19, rotating shaft 20, actuating flange 201, cam 21, clamping pin 22, torsional spring 23, ejector rod 24, arc-shaped push rod 241, base 25, support shaft 251, support piece 252, positioning piece 253, recess 2531, release pin 26. DETAILED DESCRIPTION
[0025] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.
[0026] As Figures 1 to 8 As shown, the automatic plate changing integrated dumbbell 10 of the present application comprises a dumbbell 10 and a base 25 for limiting the placement of the dumbbell 10 as a whole. The base 25 is provided with a support piece 252 and a positioning piece 253 at both ends, respectively, the support piece 252 is used for limiting the placement of the dumbbell plates 11 at both ends of the dumbbell 10, and the positioning piece 253 is used for positioning the placement of the dumbbell 10, and a plurality of dumbbell plates 11 at both ends of the dumbbell 10 are placed in the placement space formed between the support piece 252 and the positioning piece 253. The dumbbell 10 comprises a handle 12, two telescopic rods 13 are telescopically installed in the handle 12, and the telescopic rod 13 can adjust the number of dumbbell plates 11 supporting the end of the dumbbell 10 when telescoping. The inside of the handle 12 is formed with a spiral driving groove 121 for driving the telescopic rod 13 to telescope, the outer periphery of the telescopic rod 13 is formed with a driving protrusion 132 for cooperating with the spiral driving groove 121, and the spiral directions of the driving protrusions 132 of the two telescopic rods 13 are opposite, so that the two telescopic rods 13 inside can be driven to perform telescopic movement by rotating the handle 12. The center of the plurality of dumbbell plates 11 is formed with a through hole 111 for inserting the telescopic rod 13 when telescoping. Both ends of the handle 12 are respectively provided with a indexing telescopic assembly, through which the linear movement of the two telescopic rods 13 can be limited, and the telescopic rod 13 is simultaneously indexed to make the telescopic rod 13 rotate every degree corresponding to the position of a dumbbell plate 11. That is, through indexing, the handle 12 rotates every degree, and the telescopic rod 13 will insert and install a corresponding dumbbell plate 11, so that it can be clearly known that how many dumbbell plates 11 are inserted and installed by the telescopic rod 13. The handle 12 and the indexing telescopic assembly are correspondingly marked with indexing display marks.
[0027] Further, the telescopic rod 13 is provided with a dumbbell plate fixing assembly, which is linked with the mechanism of the indexing telescopic assembly, that is, the indexing telescopic assembly can drive the dumbbell plate fixing assembly to fix the dumbbell plate 11 when preventing the telescopic rod 13 from telescoping, or the indexing telescopic assembly can drive the dumbbell plate fixing assembly to release the dumbbell plate 11 when allowing the telescopic rod 13 to telescope.
[0028] Therefore, the automatic plate changing integrated dumbbell 10 described above can drive the telescopic rod 13 to linearly telescope along the inside of the handle 12 through the spiral driving groove 121 under the structure limitation of the indexing telescopic assembly, so that one end of the telescopic rod 13 inserts and installs the required number of dumbbell plates 11, and then the dumbbell plate fixing assembly fixes the dumbbell plates 11 inserted and installed on the outer periphery of the telescopic rod 13, which can realize the quick adjustment of the number of dumbbell plates 11 of the dumbbell 10 without the need of disassembling the dumbbell plates 11, only the handle 12 needs to be rotated to replace and adjust the dumbbell plates 11, the adjustment structure is simple, efficient, time-saving and labor-saving, and effectively improves the user's experience. The mechanism of the dumbbell plate fixing assembly and the indexing telescopic assembly is designed as an integrated structure, the adjustment operation is more smooth, smooth and timely, and no other auxiliary operation is needed.
[0029] As a specific structure, the indexing telescopic assembly comprises a flange 14 rotatably connected to the end of the handle 12 and an indexing ring 16 fixed to the end of the handle 12 and embedded inside the flange 14. The indexing ring 16 is uniformly provided with a plurality of indexing holes in the circumference, each of which is provided with an indexing pin 17 capable of telescoping. The flange 14 is formed with a positioning hole 141 into which the indexing pin 17 can be inserted so as to prevent the telescopic rod 13 from telescoping when the flange 14 and the handle 12 are rotated relative to each other. The indexing pin 17 is provided with a spring for driving the pin head of the indexing pin 17 to be inserted into the positioning hole 141 when the indexing pin 17 is aligned with the positioning hole 141 (the spring is a common structure in the indexing pin). The positioning sheet 253 is provided with a release pin 26 for being inserted into the positioning hole 141 when the dumbbell 10 is placed on the positioning sheet 253 so as to push the indexing pin 17 out of the positioning hole 141, thereby enabling the telescopic rod 13 and the handle 12 to rotate relative to each other. The flange 14 is provided with an L-shaped guide seat 15, and the telescopic rod 13 is formed with a guide groove 131 for cooperating with the L-shaped guide seat 15, so that the linear movement of the telescopic rod 13 can be limited by the limiting cooperation between the L-shaped guide seat 15 and the guide groove 131. The L-shaped guide seat 15 is formed with a hole in which a push rod 24 is slidably arranged, and one end of the push rod 24 moves between a position of being inserted into the indexing hole and a position of being withdrawn from the indexing hole and telescoped into the hole of the L-shaped guide seat 15.
[0030] Specifically, when the dumbbell 10 is placed on the base 25, the only radial positioning hole 141 of the flange 14 is aligned with the release pin 26 on the positioning sheet 253 and is lowered in cooperation. Due to the weight of the dumbbell 10, the release pin 26 is inserted into the positioning hole 141, and the outer end surface of the release pin 26 is flush with the fitting surface of the hole of the positioning hole 141 and the hole of the corresponding indexing hole, and the lower end surface of the indexing pin 17 is also flush with the fitting surface. The upper end of the indexing pin 17 pushes the push rod 24 out of the indexing hole and just makes the lower end surface of the push rod 24 located between the indexing ring 16 and the telescopic rod 13, so that the indexing ring 16 can rotate with the handle 12, thereby realizing telescopic adjustment of the telescopic rod and further adjusting the number of the required supporting dumbbell plates 11. When the dumbbell 10 is lifted, the push rod 24 is not pushed out of the indexing pin 17, i.e. one end of the push rod 24 is clamped in the indexing hole of the indexing ring 16, and the lower end of the indexing pin 17 is clamped in the positioning hole 141. In this way, the telescopic rod 13, the indexing ring 16 (i.e. the handle 12) and the flange 14 cannot rotate relative to each other, i.e. the indexing ring 16 cannot rotate in the flange 14, so as to ensure that the telescopic rod 13 cannot telescope, thereby completing the adjustment of the number of the dumbbell plates 11.
[0031] In other words, when the dumbbell 10 is used, the index pin 17 is extended to be engaged with the positioning hole 141 of the flange plate 14, so that the flange plate 14 cannot rotate relative to the handle 12, and in this case, the telescopic rod 13 in the handle 12 cannot be extended or retracted; when the dumbbell 10 is placed on the base 25, the release pin 26 on the positioning piece 253 is inserted into the positioning hole 141 of the flange plate 14, so that the flange plate 14 cannot rotate when the dumbbell 10 is placed on the base 25, and in this case, when the handle 12 is rotated, the flange plates 14 at both ends of the handle 12 will not rotate.
[0032] Specifically, the positioning piece 253 is formed with a recess 2531 for engaging the flange plate 14, and the release pin 26 described above is arranged in the recess 2531. In this way, when the dumbbell 10 is placed on the base 25, the flange plate 14 is directly engaged in the recess 2531, so that the release pin 26 can be directly aligned with the positioning hole 141 of the flange plate 14.
[0033] As a specific structure, the bell piece fixing assembly comprises a rotating shaft 20, both ends of which are rotatably arranged in the inside of the telescopic rod 13 through the rotating shaft 20 bearing. The end of the rotating shaft 20 away from the handle 12 is fixed with a cam 21, the end of the telescopic rod 13 away from the handle 12 is provided with a clamping pin 22, the through hole 111 of the bell piece 11 is provided with a clamping groove 112 for clamping the clamping pin 22, the clamping pin 22 is telescopically arranged in the sliding hole 133 formed at the end of the telescopic rod 13 through a spring, the end of the rotating shaft 20 away from the cam 21 and the inner wall of the telescopic rod 13 are provided with a torsion spring 23, through which the convex part of the cam 21 can push the clamping pin 22 out, so that the clamping pin 22 is kept engaged in the clamping groove 112, thereby realizing the fixation of the bell piece 11. One end of the push rod 24 is connected to the rotating shaft 20, for pushing the rotating shaft 20 to rotate when the index pin 17 is pushed out of the index hole, so that the convex part of the cam 21 is dislocated from the clamping pin 22, causing the clamping pin 22 to retract into the sliding hole.
[0034] That is, after the release pin 26 is inserted into the positioning hole 141, the index pin 17 inside the positioning hole 141 is pushed out while lifting the jacking rod 24, through which the rotating shaft 20 can be pushed to rotate, so that the convex part of the cam 21 is misaligned with the catch pin 22, so that the catch pin 22 is retracted into the sliding hole 133, thereby releasing the bell piece 11 to allow the telescopic rod 13 to extend linearly. In this process, since the lower end of the jacking rod 24 is retracted between the inner circumferential side of the index ring 16 and the outer circumferential side of the telescopic rod 13, when any one of the index pins 17 moves with the index ring 16 to pass through the jacking rod 24, the jacking rod 24 is lifted, and when the index pin 17 moves with the index ring 16 to be misaligned with the jacking rod 24, the inner side wall of the index ring 16 remains in contact with the jacking rod 24. In this way, as long as the dumbbell 10 is on the base 25, any one of the index pins 17 aligned with the positioning hole 141 will be pushed by the release pin 26 that is always retracted in the index ring, that is, the jacking rod 24 is always in a state of being lifted, that is, the catch pin 22 is always in a state of being retracted into the sliding hole.
[0035] Specifically, the rotating shaft 20 is formed with a pushing flange 201 for contacting the jacking rod 24, and the upper end of the jacking rod 24 is provided with an arc-shaped push rod 241, the end of the arc-shaped push rod 241 abuts against the pushing flange 201 and is arranged by abutting against the arc surface of the rotating shaft 20, so that the pushing operation of the jacking rod 24 on the rotating shaft 20 is more stable.
[0036] Further, the end of the telescopic rod 13 is provided with a plurality of catch pins 22 in the circumferential direction, and the circumferential side of the cam 21 is formed with a plurality of convex parts and recesses 2531 arranged at intervals, and each catch pin 22 moves between contacting the corresponding convex part and contacting the corresponding recess 2531. In this way, through the extension and contraction of the plurality of catch pins 22, the locking stability of the bell piece 11 can be improved.
[0037] Based on the above structure, in operation, after the dumbbell 10 is placed on the positioning sheet 253, the release pin 26 pushes out the indexing pin 17 in the positioning hole 141, which pushes up the top rod 24 to drive the rotating shaft 20 to rotate forward against the torsion of the torsion spring 23, and the rotating shaft 20 in turn drives the cam 21 to rotate, so that the recess 2531 of the cam 21 corresponds to the locking pin 22, so that the locking pin 22 loses the pushing force and is separated from the locking groove 112 under the pulling force of the elastic member, and the dumbbell sheet 11 is released, so that the telescopic rod 13 can perform telescopic movement in the through hole 111 of the plurality of dumbbell sheets 11. At the same time, after the indexing pin 17 is separated from the positioning hole 141, the handle 12 can be rotated relative to the flange plate 14. Due to the structural cooperation of the L-shaped guide seat 15 on the flange plate 14 and the guide groove 131 of the telescopic rod 13, the telescopic rod 13 is constrained to only perform linear movement, so that the handle 12 can drive the telescopic rod 13 to perform linear movement through the helical driving groove 121 when the handle 12 is rotated. When the telescopic rod 13 moves to the position of the dumbbell sheet 11 with the specified number of sheets, the handle 12 is lifted, the release pin 26 is separated from the positioning hole 141, and the corresponding indexing pin 17 is inserted into the positioning hole 141. At the same time, the rotating shaft 20 is reversely rotated under the torsion of the torsion spring 23, thereby driving the cam 21 to rotate to the convex part to push out the locking pin 22, and the locking pin 22 is locked into the locking groove 112 to fix the dumbbell sheet 11, and at the same time, the top rod 24 is driven downward by the cam 21 to the lower end of the corresponding indexing hole.
[0038] Through the above linkage structure, the structure for adjusting the number of dumbbell sheets 11 and locking the number of dumbbell sheets 11 is integrated, and the operation is more convenient. The driving structure of the helical driving groove 121 and the driving protrusion 132 is used to adjust the telescopic rod 13, the structure is simpler, the cost is lower, the error is smaller, and the telescopic adjustment is more accurate.
[0039] The existing dumbbell 10 fixing structure adopts a clamping structure between the dumbbell 10 pieces to fix the dumbbell pieces 11, which needs to process a notch or a hole on the dumbbell 10 piece, embed a plastic clamping plug, destroy the gravity balance of the dumbbell 10, and also greatly increase the manufacturing cost, reduce the weight of the dumbbell 10, and increase the overall volume of the dumbbell 10. The embedded part is also easy to damage and fall off, which increases the safety risk. Compared with the existing scheme, in the dumbbell piece 11 fixing structure of the utility model, there is no any gap or hole and attached part except the center through hole 111, the dumbbell piece 11 retains perfect gravity balance during use, and the manufacturing cost is further reduced. The utility model fixes the dumbbell piece 11 by using the gravity of the dumbbell 10, which makes the release pin 26 lift the indexing pin 17, then the indexing pin 17 lifts the jacking rod 24, then the jacking rod 24 drives the rotating shaft 20 to rotate, and the dumbbell piece 11 is released. That is, when the dumbbell 10 is put down, a series of actions are generated, and when the dumbbell 10 is lifted, the action is reset in the reverse direction due to the elastic force of the spring and the torsional force of the torsional spring 23. Therefore, the cam 21 on the rotating shaft 20 generates forward and reverse rotation during the process of putting down and lifting the dumbbell 10, and the clamping pin 22 on the surface of the cam 21 is retracted and extended, so as to realize the disconnection and locking between the dumbbell piece 11 and the telescopic rod 13. The clamping structure is simple in structure, small in component, and simple in processing technology, which greatly saves the manufacturing cost. At the same time, under the same quality, the overall volume of the dumbbell 10 of the utility model is smaller. According to the use principle of the dumbbell 10 with large quality and small volume, the technical scheme of the utility model obviously improves the convenience of use of the dumbbell 10, and the gravity balance of the dumbbell piece 11 further improves the physical performance of the dumbbell 10.
[0040] As a specific embodiment, the indexing telescopic assembly further comprises a code ring 18 and a compression cover 19. The code ring 18 is sleeved on the outer periphery of the end of the handle 12 and a gap is formed between the handle 12, and the compression cover 19 is sleeved on the outer periphery of the handle 12 and is compressed in the gap, so as to fix the code ring 18 on the end of the handle 12. Then, the compression cover 19, the code ring 18 and the indexing ring 16 are fixed as a whole by a plurality of screws. In this way, the indexing ring 16 is fixed by the code ring 18 with indexing value marks, which is convenient for users to understand the indexing telescopic condition of the telescopic rod 13 in real time, so as to intuitively understand the piece number adjustment condition of the dumbbell piece 11. At the same time, the connection between the handle 12 and the code ring 18 adopts a compression type, instead of welding or screw fixing or clamping connection. This connection mode is convenient for disassembly, stable in structure, can bear greater torsional force and impact force, is not easy to fall off or deform, and is simpler in structure.
[0041] Further, the flange plate 14 is partially sleeved on the outer periphery of the indexing ring 16, and a retaining ring is further arranged between the flange plate 14 and the indexing ring 16. By mounting the retaining ring in the clamping groove outside the indexing ring 16 and clamping in the clamping groove inside the flange plate 14, the axial position of the flange plate 14 and the indexing ring 16 can be limited, so that when the dumbbell 10 is placed on the base 25, the indexing pin 17 is disengaged from the flange plate 14, and when the handle 12 drives the indexing ring 16 to rotate in the flange plate, the retaining ring can prevent the indexing ring 16 from moving axially in the direction of the handle 12. At the same time, the retaining ring realizes the rotary connection between the flange plate 14 and the indexing ring 16, which is simple in structure and has no redundant head protrusions of the circlip, so as not to affect the installation of other structures, and has higher installation structural precision.
[0042] As a specific embodiment, the spiral driving groove 121 is a spiral groove with an arc-shaped inner wall, and the driving protrusion 132 is composed of a steel ball rollingly embedded on the outer wall of the telescopic rod 13. In this way, the steel ball is embedded on the telescopic rod 13, and the telescopic rod 13 is pushed and retracted more smoothly and stably by the cooperation between the steel ball and the arc-shaped spiral groove on the inner wall of the handle 12, and the structure is simpler and lower in cost in processing technology.
[0043] As a specific embodiment, the base 25 is provided with two supporting shafts 251. The two supporting shafts 251 penetrate the supporting sheet 252 and the positioning sheet 253 from the two sides of the supporting sheet 252 and the positioning sheet 253, so as to support and limit the dumbbell plate 11 from the two sides of the dumbbell plate 11, and the overall support of the dumbbell 10 is better.
[0044] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the above examples do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.
Claims
1. An automatic plate-changing integrated dumbbell, characterized in that, The dumbbell comprises: a base for limiting the placement of the dumbbell as a whole; both ends of the base are respectively provided with a support piece for limiting the placement of the dumbbell pieces at both ends of the dumbbell and a positioning piece for positioning the placement of the dumbbell; a placement space for placing a plurality of dumbbell pieces is formed between the support piece and the positioning piece; the dumbbell comprises a handle; two telescopic rods for supporting a plurality of dumbbell pieces at the end of the dumbbell are telescopically installed in the handle; a spiral driving groove is formed in the inside of the handle for driving the telescopic rod to telescope; a driving protrusion is formed on the outer periphery of the telescopic rod for cooperating with the spiral driving groove; a through hole is formed in the center of a plurality of dumbbell pieces for inserting the telescopic rod; both ends of the handle are respectively provided with a indexing telescopic assembly for limiting the linear motion of the two telescopic rods and indexing the telescopic rods to make each degree of rotation of the telescopic rods correspond to the position of a dumbbell piece; a dumbbell fixing assembly is provided in the telescopic rod for being driven by the indexing telescopic assembly to fix the dumbbell piece when the telescopic rod is prevented from telescoping or being released by the indexing telescopic assembly when the telescopic rod is allowed to telescope.
2. The automatic piece-changing integrated dumbbell according to claim 1, wherein the indexing telescopic assembly comprises a flange disc rotatably connected to the end of the handle and an indexing ring fixed to the end of the handle and embedded in the inside of the flange disc; a plurality of indexing holes uniformly distributed in the circumferential direction of the indexing ring are provided with an indexing pin; the flange disc is formed with a positioning hole for inserting the indexing pin to prevent the telescopic rod and the handle from rotating relative to each other; the indexing pin is provided with a spring for inserting the pin head of the indexing pin into the positioning hole; the positioning piece is provided with a release pin for inserting into the positioning hole when the dumbbell is placed on the positioning piece to eject the indexing pin out of the positioning hole; the flange disc is provided with an L-shaped guide seat for limiting the linear motion of the telescopic rod; the telescopic rod is formed with a guide groove for cooperating with the L-shaped guide seat; a top rod is slidably provided in the hole formed in the L-shaped guide seat; the top rod moves between the position of being inserted into the indexing hole and the position of being separated from the indexing hole and telescoped into the hole formed in the L-shaped guide seat.
3. The automatic piece-changing integrated dumbbell according to claim 2, wherein the indexing telescopic assembly further comprises a character code ring and a compression cover; the character code ring is sleeved on the outer periphery of the end of the handle and forms a gap with the handle; the compression cover is sleeved on the outer periphery of the handle and is compressed in the gap to fix the character code ring to the end of the handle; the compression cover, the character code ring and the indexing ring are fixed as a whole by a plurality of screws.
4. The automatic piece-changing integrated dumbbell according to claim 2, wherein part of the flange disc is sleeved on the outer periphery of the indexing ring, and a stop ring is further provided between the flange disc and the indexing ring for limiting the axial position of the flange disc and the indexing ring.
5. The automatic piece-changing integrated dumbbell according to claim 2, wherein The screw driving groove is a spiral groove with arc-shaped inner wall; The driving protrusion is composed of a steel ball rollingly embedded on the outer wall of the telescopic rod.
6. The automatic plate-changing integrated dumbbell of claim 2, wherein The dumbbell plate fixing assembly comprises a rotating shaft rotatingly arranged in the interior of the telescopic rod; An end of the rotating shaft away from the handle rod is fixed with a cam; An end of the telescopic rod away from the handle rod is provided with a bayonet pin; The through hole of the dumbbell plate is provided with a bayonet slot for the bayonet pin to be inserted into; The bayonet pin is telescopically arranged in a sliding hole formed at the end of the telescopic rod through an elastic member; A torsion spring is arranged between an end of the rotating shaft away from the cam and the inner wall of the telescopic rod for driving the convex part of the cam to eject the bayonet pin; One end of the ejector rod is connected to the rotating shaft for pushing the rotating shaft to rotate when the indexing pin is ejected from the indexing hole, so that the convex part of the cam is misaligned with the bayonet pin, causing the bayonet pin to retract into the sliding hole.
7. The automatic plate-changing integrated dumbbell of claim 6, wherein The rotating shaft is formed with a pushing flange for contacting the ejector rod; The upper end of the ejector rod is provided with an arc-shaped push rod with an end abutting against the pushing flange and abutting against the rotating shaft.
8. The automatic plate-changing integrated dumbbell of claim 6, wherein The end of the telescopic rod is circumferentially provided with a plurality of bayonet pins; The cam is circumferentially formed with a plurality of convex parts and concave parts arranged at intervals; Each bayonet pin moves between contacting the corresponding convex part and contacting the corresponding concave part.
9. The automatic plate-changing integrated dumbbell of claim 1, wherein The base is provided with two support shafts for supporting and limiting the dumbbell plates from both sides of the dumbbell plates; The two support shafts pass through the support plate and the positioning plate from both sides of the support plate and the positioning plate.
10. The automatic plate-changing integrated dumbbell of claim 2, wherein The positioning plate is formed with a recess for clamping the flange; The recess is provided with the release pin.