Adjusting dumbbells

Abstract

This utility model discloses an adjustable dumbbell, comprising: a dumbbell and a base; multiple weight plates of the dumbbell are respectively positioned at both ends of the base; a handle is provided between the weight plates at both ends of the dumbbell; two telescopic rods are telescopically installed inside the handle; through holes for inserting the telescopic rods are formed in the center of the multiple weight plates; flanges are respectively installed at both ends of the handle; an indexing plate is provided inside the flange; indexing pins are elastically installed in the pin holes formed at both ends of the handle; multiple indexing holes for inserting the indexing pins are evenly distributed circumferentially on the indexing plate; a weight plate fixing component is provided inside the telescopic rod for fixing or releasing the corresponding weight plates; a locking pin is provided on the flange for locking the handle and the flange under the action of the weight plate fixing component; locking grooves for inserting the locking pins are evenly arranged circumferentially on the handle. The adjustable dumbbell can synchronously and quickly adjust and replace the weight plates.

Description

Technical Field

[0001] This utility model relates to an adjustable dumbbell that can provide multiple weight adjustments. Background Technology

[0002] Traditional dumbbells consist of weight plates fitted onto the ends of the dumbbell handle, with threaded end caps screwed onto the handles to secure the weight plates. This design requires removing the threaded end caps to change the weight plates, adjusting the number of plates as needed, and then tightening the end caps to secure them. This simplistic design makes adjusting the weight plates complex, time-consuming, laborious, and inefficient, negatively impacting the user experience. Summary of the Invention

[0003] This utility model provides an adjustable dumbbell to solve the aforementioned technical problems, specifically adopting the following technical solution: An adjustable dumbbell includes: a dumbbell and a base for positioning the dumbbell as a whole; multiple weight plates of the dumbbell are positioned at both ends of the base; a handle is provided between the weight plates at both ends of the dumbbell; two telescopic rods for supporting the multiple weight plates at both ends of the dumbbell are telescopically installed inside the handle; through holes for inserting the telescopic rods are formed in the center of the multiple weight plates; flanges are respectively installed at both ends of the handle; an indexing plate is provided inside the flange; indexing pins are elastically installed in the pin holes formed at both ends of the handle; multiple indexing holes for inserting the indexing pins are evenly distributed circumferentially on the indexing plate; a weight plate fixing assembly is provided inside the telescopic rod for fixing or releasing the corresponding weight plates; a locking pin is provided on the flange for locking the handle and the flange under the action of the weight plate fixing assembly; locking grooves for inserting the locking pins are evenly arranged circumferentially on the handle.

[0004] Furthermore, the bell fixing assembly includes: a gear shaft rotatably disposed inside the telescopic rod; an eccentric top post fixed to the end of the gear shaft away from the grip; a locking block slidably disposed at the end of the telescopic rod for being driven by the eccentric top post to lock or release the corresponding bell; a rack meshing with the gear shaft; guide grooves formed at positions corresponding to the upper and lower ends of the rack for the upper and lower ends of the rack to extend out, thereby constraining the rack while limiting the linear movement of the telescopic rod; top pins disposed at both ends of the base at positions corresponding to the flange; a top hole formed on the flange for inserting the top pin to lift the rack; when the rack is lifted by the top pin, it drives the gear shaft to rotate, thereby driving the eccentric top post to rotate to the release position; a torsion spring disposed between the gear shaft and the telescopic rod for driving the eccentric top post to reset to the fixed position.

[0005] Furthermore, the wall of the through hole of the bell is formed with a groove for inserting the lock block; the end of the telescopic rod is formed with a sliding groove; the lock block is slidably disposed in the sliding groove and is formed with an oblong hole; the side of the eccentric top post is provided with an eccentric pin for inserting into the oblong hole so as to drive the lock block to insert into or disengage from the groove when rotating.

[0006] Furthermore, two locking blocks are symmetrically arranged at the ends of the telescopic rod; two eccentric pins are provided on the side of the eccentric top column.

[0007] Furthermore, the flange has a locking spring in the locking hole for mounting the locking pin for pushing the locking pin into the locking groove; the locking pin has a drive groove, and one side of the rack has a groove wall for engaging the drive groove to drive the locking pin to move between disengaging from and inserting into the locking groove.

[0008] Furthermore, the rack has a limiting protrusion for engaging the locking pin to limit the downward position of the rack; one side of the indexing plate has a limiting groove for engaging the rack to limit the upward position of the rack.

[0009] Furthermore, the gear shaft is rotatably mounted inside the telescopic rod via a bushing; a torsion spring is installed on one side of the bushing, with one end abutting against the inside of the telescopic rod and the other end abutting against the outer circumference of the gear shaft.

[0010] Furthermore, the two ends of the base are provided with baffles for limiting and pressing multiple bell blades; the arc formed by the two baffles that are close to each other at both ends of the base is provided with a top pin.

[0011] The advantage of this invention is that the adjustable dumbbell provided has a simple indexing adjustment design structure, which allows for easy adjustment of the number of weight plates when rotating the grip, enabling quick changes in the number of weight plates. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the dumbbell used in the application of the adjustable dumbbell of this utility model; Figure 2 yes Figure 1 A schematic diagram showing the coordination between the telescopic bar and the weight plates of the adjustable dumbbell; Figure 3 yes Figure 1 A schematic diagram of the structure of the locking grip and flange of the adjustable dumbbell; Figure 4 yes Figure 1 A schematic diagram of the locking pin and weight plate fixing assembly for the adjustable dumbbell; Figure 5 yes Figure 1 A cross-sectional view of the assembly structure of the locking pin and bell plate fixing assembly for the adjustable dumbbell; Figure 6 yes Figure 1 A schematic diagram of the internal structure of the adjustable dumbbell; Adjustable dumbbell 10, dumbbell 11, weight plate 111, through hole 1111, groove 1112, grip bar 112, pin hole (not shown), locking groove 1121, telescopic rod 113, slide groove (not shown), guide groove 1131, flange 114, locking hole 1141, top hole 115, indexing plate 117, indexing hole 1171, limiting groove 1172, indexing pin 118, locking pin 119, drive groove 1191, locking spring 120, base 12, top pin 121, baffle 122, arc part 123, unit hole position 124, weight plate fixing assembly 13, gear shaft 131, eccentric top column 132, rack 133, drive inclined surface 1331, limiting protrusion 1332, bushing 134, eccentric pin 15, locking block 14, waist-shaped hole 141. Detailed Implementation

[0014] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0015] like Figures 1 to 6 As shown, an adjustable dumbbell 10 according to this application includes: a dumbbell 11 and a base 12, wherein the base 12 is used to limit the placement of the dumbbell 11. Specifically: The dumbbell 11 has multiple weight plates 111 at each end, and the base 12 limits the placement of these weight plates 111 at each end. A grip bar 112 is located between the weight plates 111 at each end of the dumbbell 11. Two telescopic rods 113 are telescopically installed within the grip bar 112, supporting the weight plates 111 at each end of the dumbbell 11. A helical drive groove is formed on the inner side of the grip bar 112, and a drive protrusion is formed on the outer periphery of the telescopic rod 113 to engage with the helical drive groove. When the grip bar 112 rotates, the engagement of the helical drive groove and the drive protrusion drives the telescopic rod 113 to extend or retract. A through hole 1111 is formed in the center of each weight plate 111 for inserting the telescopic rod 113. Flanges 114 are mounted on both ends of the handle 112. An indexing plate 117 is located inside the flanges 114. Pin holes 1121 are formed at both ends of the handle 112, and indexing pins 118 are elastically installed within the pin holes 1121. Multiple indexing holes 1171 are evenly distributed circumferentially on the indexing plate 117 for the insertion of the indexing pins 118. When the handle 112 is rotated, the indexing pins 118 slide along the side of the indexing plate 117 under the compression of the spring, thereby sequentially inserting into the corresponding indexing holes 1171, achieving precise and smooth indexing. With each indexing increment, the telescopic rod 113 is driven to extend a specified distance. This indexing structure is simple, easy to operate, and has low structural cost.

[0016] A bell-fixing assembly 13 is provided inside the telescopic rod 113, which can fix or release the corresponding bell 111. The bell-fixing assembly 13 includes a gear shaft 131 rotatably disposed inside the telescopic rod 113, with an eccentric top post 132 fixed to the end of the gear shaft 131 away from the grip 112. A locking block 14 is slidably provided at the end of the telescopic rod for being driven by the eccentric top post to lock or release the corresponding bell. A rack 133 is meshed with the gear shaft 131. Guide grooves 1131 are formed on the telescopic rod 113 at positions corresponding to the upper and lower ends of the rack 133. The lower guide groove 1131 allows the upper end of the rack 133 to extend, and the upper guide groove 1131 allows the lower end of the rack 133 to extend. Thus, the guide grooves 1131 can constrain the rack 133 installation structure and limit the linear movement of the telescopic rod 113, resulting in a simple and stable structure that is easy and quick to install. At both ends of the base 12, corresponding to the flange 114, there are top pins 121. The flange 114 has a top hole 115 for inserting the top pins 121 to lift the rack 133. Thus, when the dumbbell 11 is placed on the base 12, the rack 133, lifted by the top pins 121, drives the gear shaft 131 to rotate, which in turn drives the eccentric top column 132 to rotate to the release position. At this time, the telescopic rod 113 can extend and retract along the through hole 1111. A torsion spring is provided between the gear shaft 131 and the telescopic rod 113. When the dumbbell 11 is lifted, the torsion spring can drive the eccentric top column 132 to return to its fixed position.

[0017] As a specific structure, the through hole 1111 of the bell slat 111 has a groove 1112 formed in its wall for the insertion of the locking block 14. The end of the telescopic rod 113 has a groove formed on its circumference, and the locking block 14 is slidably disposed within the groove. The groove is not shown in the figures of this application. The locking block 14 can extend out of or retract into the groove under the drive of the eccentric top post 132. The locking block 14 has an oblong hole 141. The eccentric top post 132 slides and extends / retracts the locking block 14 by actuating two opposing eccentric pins. An eccentric pin 15 is provided on the side of the eccentric top post 132. This eccentric pin 15 is inserted into the oblong hole 141 to drive the locking block 14 into or out of the groove 1112 during rotation.

[0018] Furthermore, two locking blocks 14 are symmetrically arranged at the end of the telescopic rod, and two eccentric pins 15 are provided on the side of the eccentric top post 132, thereby improving the stability of the locking structure of the bell 111.

[0019] Specifically, dumbbell 11 is placed on base 12. The top pin 121 on base 12 lifts rack 133, thereby causing gear shaft 131 to rotate at a certain angle. This causes the eccentric top pin 132 on the outer end face of gear shaft 131 to deflect into the outer circle of telescopic rod 113, thus disengaging from the groove 1112 in the through hole 1111 of the weight plates 111. Rotating the grip 112 forward and backward causes telescopic rod 113 to move forward or backward. The desired weight is selected according to the corresponding code on the grip 112. Then, rotating the grip 112 allows the weight to be positioned to the number of weight plates 111 corresponding to the specified weight using the indexing dial 117. Next, the dumbbell 11 is lifted. At this time, the torsion spring force on the gear shaft 131 causes the gear shaft 131 to rotate, driving the rack 133 downwards until its lower end extends out of the guide groove 1131, achieving a reset. Simultaneously, the eccentric top post 132 at the end of the gear shaft 131 rotates and shifts to protrude from the outer surface of the telescopic rod 113, locking into the groove 1112 of the weight plate 111 corresponding to the selected weight, preventing all weight plates 111 on the telescopic rod 113 from falling off. The number of weight plates cannot be adjusted at this time. When the dumbbell 11 is placed back on the base 12, the top pin 121 on the base 12 lifts the rack 133 upwards, thereby causing the gear shaft 131 to rotate at a certain angle, releasing the weight plates 111 on the outer periphery of the telescopic rod 113. This mechanism repeats, achieving the function of freely adjusting the weight when the dumbbell 11 is placed on the base 12, and locking the dumbbell 111 itself when lifted for use.

[0020] In the above structure, the flange 114 is provided with a locking pin 119. The locking pin 119 locks the handle 112 and the flange 114 under the drive of the bell fixing assembly 131. Locking grooves 1121 are evenly arranged in the circumference of the handle 112. When the bell fixing assembly 131 locks the bell 111, it drives the locking pin 119 to insert into the locking groove 1121, so that the relative position of the handle 112 and the flange 114 can be locked, thereby preventing relative rotation between the handle 112 and the flange 114 during the use of the dumbbell 11.

[0021] Specifically, the flange 114 has a locking hole 1141, and a locking pin 119 is installed in the locking hole 1141. A locking spring 120 is provided between the locking pin 119 and the bottom of the locking hole 1141. The locking spring 120 is used to push the locking pin 119 into the locking groove 1121, thereby achieving the locking function of the grip rod 112 and the flange 114. The locking pin 119 has a drive groove 1191, and a drive ramp 1331 is formed on one side of the rack 133. The drive ramp 1331, in conjunction with the groove wall of the drive groove 1191, can drive the locking pin 119 to move between disengaging from and inserting into the locking groove 1121. The rack 133 has a limiting protrusion 1332, which can abut against the locking pin 119 to limit the downward position of the rack 133, thereby preventing the rack 133 from falling off or being pulled out. A limiting groove 1172 is formed on one side of the indexing plate 117. The limiting groove 1172 can cooperate with the rack 133 to limit the upward position of the rack 133.

[0022] Specifically, when the dumbbell 11 is lifted off the base 12, the rack 133 extends outward from the top hole 115 of the flange 114 under the drive of the torsion spring. The drive ramp 1331 of the rack 133 disengages from the drive groove 1191, allowing the locking pin 119 to be inserted into the locking groove 1121 under the drive of the locking spring 120. At this time, the grip 112 and the flange 114 are locked and cannot rotate, so the telescopic rod 113 inside the grip 112 will not move during use. When the dumbbell is placed on the base, the rack 133 is pushed inward by the top pin 121, and the drive ramp 1331 of the rack 133 gradually presses against the groove wall of the drive groove 1191, thereby driving the locking pin 119 to retract into the flange until it disengages from the locking groove 1121. At this time, the grip 112 can rotate, and the number of bells 111 can be adjusted.

[0023] In one specific implementation, the gear shaft 131 is rotatably mounted inside the telescopic rod 113 via the bushing 134. A torsion spring is installed on one side of the bushing 134, with one end abutting against the inside of the telescopic rod 113 and the other end abutting against the outer periphery of the gear shaft 131, thus ensuring a stable rotational support structure.

[0024] In one specific implementation, baffles 122 are provided at both ends of the base 12 to limit and press the multiple bell blades 111. The arc 123 formed by the two baffles 122 that are close to each other at both ends of the base 12 is provided with the aforementioned top pin 121.

[0025] Furthermore, the base 12 has multiple individual unit holes 124 for inserting corresponding bell shards 111. The bell shards 111 have chamfered edges on their periphery, and the hole walls of the unit holes 124 are adapted to the chamfered shape, thereby improving the accuracy of the positioning and installation of the bell shards 111, preventing gaps between the bell shards 111 from causing wobbling, and facilitating the telescopic rod 113 to accurately select the specified number of bell shards 111.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. An adjustable dumbbell, comprising: A dumbbell and a base for positioning and holding the dumbbell; characterized in that, The base has multiple weight plates at both ends of the dumbbell respectively positioned and limited. The dumbbell has a grip between the weight plates at both ends; The grip bar has two telescopic rods that are respectively used to support the multiple weight plates at both ends of the dumbbell; The center of each of the bell blades has a through hole for inserting the telescopic rod; Flanges are installed at both ends of the grip; The flange is provided with an indexing plate on its inner side; The two ends of the grip have indexing pins elastically installed in the pin holes formed therein; The indexing plate has multiple indexing holes evenly distributed around its circumference for inserting the indexing pins. The telescopic rod is equipped with a bell fixing assembly for fixing or releasing the corresponding bell; The flange is provided with a locking pin that locks the handle and the flange under the action of the bell fixing assembly; The grip bar is uniformly provided with locking grooves around its circumference for the insertion of the locking pin.

2. The adjustable dumbbell according to claim 1, characterized in that, The bell fixing assembly includes: a gear shaft rotatably disposed inside the telescopic rod; An eccentric top post is fixed to the end of the gear shaft away from the grip; The end of the telescopic rod is slidably provided with a locking block for being driven by the eccentric top column to lock or release the corresponding bell. The gear shaft is meshed with a rack; The telescopic rod has guide grooves formed at positions corresponding to the upper and lower ends of the rack, respectively, for the upper end of the rack to extend and the lower end of the rack to extend, so as to constrain the rack while limiting the linear movement of the telescopic rod. The base has top pins at both ends corresponding to the flange. The flange is formed with a top hole for inserting the top pin to lift the rack; When the rack is lifted by the top pin, it drives the gear shaft to rotate, thereby driving the eccentric top pin to rotate to the release position; A torsion spring is provided between the gear shaft and the telescopic rod to drive the eccentric top column to reset to the fixed position.

3. The adjustable dumbbell according to claim 2, characterized in that, The wall of the through hole of the bell is formed with a groove for inserting the lock block; The end of the telescopic rod is formed with a sliding groove; The locking block is slidably disposed within the groove and has an oblong hole; The side of the eccentric top post is provided with an eccentric pin for inserting into the waist-shaped hole, so as to drive the locking block into or out of the groove when rotating.

4. The adjustable dumbbell according to claim 3, characterized in that, Two locking blocks are symmetrically arranged at the ends of the telescopic rod; The eccentric top column is provided with two eccentric pins on its side.

5. The adjustable dumbbell according to claim 2, characterized in that, The flange has a locking hole for mounting the locking pin, which is provided with a locking spring for pushing the locking pin into the locking groove. The locking pin has a drive groove, and one side of the rack has a groove wall for engaging with the drive groove to drive the locking pin to move between disengaging from and inserting into the lock groove.

6. The adjustable dumbbell according to claim 5, characterized in that, The rack has a limiting protrusion for abutting against the locking pin to limit the downward position of the rack; One side of the indexing plate has a limiting groove for engaging with the rack to limit the upward position of the rack.

7. The adjustable dumbbell according to claim 2, characterized in that, The gear shaft is rotatably mounted inside the telescopic rod via a bushing; The torsion spring is installed on one side of the bushing, with one end abutting the inside of the telescopic rod and the other end abutting the outer periphery of the gear shaft.

8. The adjustable dumbbell according to claim 2, characterized in that, The base has baffles at both ends for limiting and pressing the multiple bell pieces; The top pin is provided at the arc formed by two adjacent baffles at both ends of the base.

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