Multi-gear fine adjustment method for weight of dumbbell

Abstract

The invention relates to the technical field of fitness equipment, and particularly discloses a dumbbell weight multi-gear fine adjustment method which comprises the following steps: driving a transmission structure to move by rotating a handle; the transmission structure sequentially drives at least two independent weighting assemblies according to the gear sequence. Each gear correspondingly drives one weighting component, so that the weight of a single side of the dumbbell is increased according to a set increment; when rotating to a specific gear, the transmission structure simultaneously releases all the previously driven weighting components and drives a preset basic weight sheet; the method is suitable for dumbbell pieces of any weight, and weight subdivision adjustment is achieved by configuring weighting assemblies of different numbers and weights. The mechanical logic that the independent small weight blocks are accumulated in a grading sequence is adopted, and the method is different from a traditional adjusting mode that weight stepping is limited by the weight of a single dumbbell piece, so that increment adjustment can be conducted on the dumbbell with the weight unit far smaller than that of a conventional dumbbell piece.

Description

Technical Field

[0001] This invention belongs to the field of fitness equipment technology, specifically relating to a method for finely adjusting the weight of dumbbells in multiple levels. Background Technology

[0002] In fitness training, adjustable dumbbells are widely used due to their space-saving and economical advantages. Currently, adjustable dumbbells on the market mainly use pin-type, knob-type, or lever-type structures to achieve weight switching. Their core principle is to select different specifications of prefabricated dumbbell plates through mechanical mechanisms to achieve the conversion between several fixed weight levels. The adjustment granularity of these dumbbells directly depends on the smallest weight unit of the dumbbell plates they are equipped with.

[0003] However, the aforementioned existing technologies are limited by the manufacturing process, cost, and structural strength of dumbbell plates, resulting in a typically large minimum weight unit. This leads to coarse weight adjustment steps, preventing users from precisely increasing the load based on slight increases in strength. This fails to meet the stringent requirements of precise load control in modern fitness training. Furthermore, to achieve a relatively large number of weight levels, some designs necessitate increasing the number of dumbbell plates or employing complex plate selection mechanisms. This often results in more complex product structures, bulkier sizes, and cumbersome operation, while also challenging reliability and durability during frequent adjustments. Therefore, providing a dumbbell adjustment solution that achieves precise weight adjustment while maintaining a compact structure and ease of operation has become a pressing technical problem in this field. Summary of the Invention

[0004] The purpose of this invention is to provide a method for finely adjusting the weight of dumbbells in multiple levels, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A method for finely adjusting the weight of dumbbells in multiple increments includes:

[0007] The transmission structure moves by rotating the handle;

[0008] The transmission structure drives at least two independent weight-bearing components in sequence according to the gear positions;

[0009] Each gear position corresponds to a weight-adding component, allowing the weight on one side of the dumbbell to increase incrementally according to a set increment.

[0010] When rotated to a specific gear, the transmission structure simultaneously releases all previously driven weight components and drives a preset base weight plate;

[0011] The method is applicable to dumbbell plates of any weight, and weight adjustment can be achieved by configuring different numbers and weights of weight-adding components.

[0012] Preferably, the transmission structure includes a spiral disk and a hook mechanism. The rotating handle drives the spiral disk to rotate in steps, and the hooks on it sequentially hook the weighting components on the left and right sides. Each weighting component weighs 0.5 kg.

[0013] Preferably, the transmission structure includes a cam assembly and a transverse pin assembly. Rotating the handle drives the cam to sequentially push out the corresponding transverse pins, so that the pins are inserted into the grooves of the corresponding weighting components. Each weighting component weighs 0.5 kg.

[0014] Preferably, the weighting component is an attachable block independent of the main dumbbell plate, and its weight is 0.5 kg, 1 kg or other subdivided weight units.

[0015] A dumbbell that achieves weight adjustment using a multi-level fine adjustment method for dumbbell weight as described in any of the above.

[0016] A dumbbell adjustment mechanism includes a rotating handle, a transmission structure, and multiple independent weight-adding components. The transmission structure is configured to sequentially drive or release the weight-adding components according to the gear position when performing any of the methods described above, thereby achieving multi-level fine adjustment of the dumbbell weight.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] (1) By adopting the mechanical logic of accumulating independent small weight blocks in a graded sequence, unlike the traditional adjustment method where the weight step is constrained by the weight of a single dumbbell plate, the dumbbell can be adjusted in increments of weight units much smaller than those of conventional dumbbell plates, thereby matching the refined needs of users to progressively increase training load and improving the scientific nature and flexibility of training.

[0019] (2) Through the transmission and locking mechanism, the two functions of multi-level small weight accumulation and reset switching are organically integrated to ensure the smoothness and accuracy of weight change within the fine adjustment range, and also to realize the convenience of switching to a larger training weight. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention;

[0021] In the diagram: 1. Rotary handle; 2. Weighting component. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1:

[0024] Please see Figure 1 As shown, a method for finely adjusting the weight of a dumbbell in multiple levels includes:

[0025] The transmission structure moves by rotating handle 1;

[0026] The transmission structure drives at least two independent weight-bearing components 2 in sequence according to the gear shift.

[0027] Each gear position corresponds to a weight-adding component 2, which enables the weight of the dumbbell on one side to increase incrementally according to the set increment.

[0028] When rotated to a specific gear, the transmission structure simultaneously releases all the previously driven weight components 2 and drives a preset base weight plate;

[0029] The method is applicable to dumbbell plates of any weight, and weight subdivision adjustment is achieved by configuring different numbers and weights of weight-adding components 2.

[0030] This embodiment uses four-speed adjustment as an example. The transmission structure specifically includes a spiral disc and a hook mechanism. Rotating the handle 1 drives the spiral disc to rotate step by step. Each time the handle is rotated to a different speed, the spiral disc rotates a certain angle, and the hooks on it sequentially hook the weight components 2 on the left and right sides, including:

[0031] Initial state: All weight components 2 are in an unloaded state, and the dumbbells only contain the base weight plates (if assembled).

[0032] First gear: Rotating handle 1 causes the spiral disc to rotate at the first angle, and the first barb on the spiral disc drives the first weight-adding components 2 on both sides (0.5kg each), increasing the total weight of the dumbbell by 1kg.

[0033] Second gear: Continue to rotate the handle to the second gear. The spiral disc continues to rotate. While the second barb is in the hooking state of the first barb, it drives the second weight-adding components 2 on both sides (0.5kg each). At this time, the total weight increases by 1kg, for a cumulative increase of 2kg.

[0034] Third gear: When rotated to the third gear, the spiral disc rotates further, and the third barb, while keeping the first two sets of weight-adding components from being released, drives the third weight-adding component 2 on both sides (0.5kg each), increasing the total weight by 3kg.

[0035] Fourth gear: When rotating to the fourth gear, the linkage release mechanism on the spiral disc (such as through the cooperation of parts 13, 12, and 11) activates, simultaneously releasing all three previously hooked weight components 2, and driving a preset, heavier base weight plate (e.g., a 2kg plate, totaling 4kg on both sides), thus achieving a significant weight jump. At this point, the dumbbell weight is the base weight plate weight, realizing gear cycle and weight reset.

[0036] This structure implements an adjustment logic that combines "progressive addition" and "phased reset," ensuring both fine adjustment for small weights and rapid switching for large weights.

[0037] In one embodiment of the present invention, the weighting component 2 is an attachable block independent of the main dumbbell plate, and its weight can be 0.5kg, 1kg, or other subdivided weight units. By increasing or decreasing the number of weighting components or replacing them with different specifications of weighting components, dumbbell plates of different base weights can be flexibly adapted to achieve fine adjustments in multiple steps such as 0.5kg, 1kg, and 1.5kg.

[0038] A dumbbell that uses a multi-level fine-tuning method for dumbbell weight adjustment as described above to achieve weight adjustment.

[0039] A dumbbell adjustment mechanism includes a handle 1, a transmission structure, and multiple independent weight-adding components 2. The transmission structure is configured to sequentially drive or release the weight-adding components according to the gear position when performing any of the above methods, thereby realizing multi-level fine adjustment of the dumbbell weight.

[0040] Example 2:

[0041] In this embodiment, the transmission structure adopts a combination mechanism of cam group and transverse pin group;

[0042] The dumbbell adjustment mechanism of this embodiment includes a rotating handle 1, a cam assembly, a transverse pin assembly, and multiple independent weighting components 2;

[0043] The cam assembly includes at least three cams: cam 1, cam 2, and cam 3, which are coaxially arranged and can move independently or in conjunction with each other. Each cam has one or more protrusions on its profile. The transverse pin assembly includes three transverse pins: pin 1, pin 2, and pin 3, which correspond to the number of cams. One end of each pin contacts the corresponding cam profile, and the other end can extend radially. Each weighting component 2 is an independent block, and its side has a groove that matches the end of the transverse pin.

[0044] This embodiment uses four-level adjustment as an example for explanation, including:

[0045] Initial state: All cams are in the initial phase, all lateral pins are in the retracted state under the action of the return spring, not inserted into the groove of any weighting component 2, and the dumbbells are at the base weight.

[0046] First position: The user rotates handle 1 to the first position. Handle 1 drives cam 1 to rotate at a certain angle. The protrusion on the contour of cam 1 begins to press against the transverse pin 1, causing it to overcome the spring force and extend radially to both sides. The extended pin 1 is precisely inserted into the grooves of the weight-adding components 1 located on the left and right sides, thereby locking and lifting the two weight-adding components. At this time, the total weight of the dumbbell increases by 1kg.

[0047] Second gear: The handle 1 continues to rotate to the second gear. This action causes the second cam to start rotating. The protrusion of the second cam presses against the second transverse pin, causing it to extend and insert into the grooves of the second weight component (0.5kg) on ​​the left and right sides. The phase of the first cam is locked or held during this process, and the first pin remains extended. Therefore, the first weight component is not released. At this time, two weight components are added on both sides, and the total weight is increased by 1kg on the basis of the previous gear, for a cumulative increase of 2kg.

[0048] Third gear: Rotate handle 1 to the third gear, and cam 3 will rotate accordingly. Its protrusion will push out the horizontal pin 3, and pin 3 will insert into the groove of the weight-adding component 3 on the left and right sides. Cam 1 and cam 2 will still maintain their phase, and pin 1 and pin 2 will remain locked. At this point, all three sets of weight-adding components (three pairs in total) will be lifted, and the total weight will increase by 3kg.

[0049] Fourth position: When handle 1 is rotated to the fourth position, the transmission mechanism is designed with a linkage release mechanism. For example, rotation of handle 1 will trigger a release cam or linkage rod, which forces cam one, cam two, and cam three to simultaneously or sequentially reset to their initial phase. All transverse pins retract synchronously under the action of their respective return springs, thereby releasing all three pairs of previously locked weighting components.

[0050] This linkage action can drive a preset base weight plate through another transmission path and lock it with the handle body. This gear achieves the switching from "fine accumulation mode" to "base weight plate mode", and the weight jumps to the weight of the base plate.

[0051] Preferably, the cam assembly can be mounted on a common camshaft and driven in stages by a handle via ratchet, planetary gear system or gears with different numbers of teeth, ensuring that each gear can only drive the specified cam action;

[0052] Each transverse pin may be equipped with a roller at the end that contacts the cam to reduce friction; the groove of the weighting component 2 may be designed as a ramp guide to facilitate the smooth insertion of the pin even if there is a slight misalignment.

[0053] Example 3:

[0054] This embodiment provides a fine-tuning scheme for dumbbell weight based on a sliding locking pin and a linkage channel mechanism. The dumbbell adjustment mechanism of this embodiment includes a rotatable selection disk, a set of radially sliding locking pins, and a release ring that is linked to all locking pins. The weighting component 2 is an independent counterweight block, and each counterweight block is provided with a locking hole for the end of the locking pin to be inserted.

[0055] Specifically, the selection plate is fixed to the rotating shaft of the rotating handle 1. Its surface has three independent, spirally involute guide grooves, corresponding to locking pin one, locking pin two, and locking pin three, respectively. Each locking pin has a guide post in its center, which is nested within the corresponding guide groove of the selection plate. The locking pin can only slide radially along the dumbbell within the guide groove of the housing. The inner end of the locking pin (near the selection plate) is acted upon by a return spring, while the outer end is a conical or cylindrical head that can be inserted into the locking hole of the weighting component. A release ring is sleeved on the outside of the selection plate and can slide slightly axially. The inner surface of the release ring has a wedge-shaped slope or boss corresponding to the position of each locking pin. The release ring is connected to a lever or lifting cam that can be triggered in the fourth position. The weighting component 2 consists of multiple independent counterweights stacked along the dumbbell's axial direction. Each counterweight has a locking hole at a radial position on its side.

[0056] This embodiment uses four-level adjustment as an example for explanation, including:

[0057] Initial state: Handle 1 is in the "0" position. The starting section of each guide groove on the selection plate is designed to keep the locking pin in the most retracted position. Under the action of the return spring, the outer ends of all locking pins are completely retracted and are not inserted into the locking holes of any weighting component 2. The release ring is in the forward position (away from the direction of the weighting component).

[0058] First position: Rotate handle 1 to the first position, the selection plate rotates accordingly, the guide post of locking pin one moves along the first guide groove, the specific geometry of the groove converts the rotational motion into the outward linear motion of locking pin one, causing it to overcome the spring force and extend outward, and insert into the locking hole of the outermost first weight component one (0.5kg), locking it with the dumbbell body; due to the isolation design of the guide groove, locking pin two and locking pin three remain stationary at this time.

[0059] Second position: Continue rotating handle 1 to the second position. The selection dial continues to rotate, and the guide post of locking pin two begins to enter the working section of its corresponding second guide groove, pushing locking pin two to move radially outward. Locking pin two extends and inserts into the locking hole of the second weight component (0.5kg). At the same time, the first guide groove enters a holding section, keeping locking pin one in its extended state, thus keeping weight component one locked. The total weight of the dumbbells increases by 1kg, totaling 2kg.

[0060] Third position: Rotate to the third position, the selection plate drives the guide post of the locking pin three into the working section of the third guide groove, pushes the locking pin three out, and locks the third weight component three (0.5kg). At this time, the first two guide grooves are in the holding section, the locking pin one and the locking pin two remain in the extended state, all three weight components are locked, and the total weight increases by 3kg.

[0061] Fourth position: When handle 1 is rotated to the fourth position, a protrusion on the handle shaft or a specially designed trigger mechanism begins to push the lever connected to the release ring, forcing the release ring to slide axially backward (towards the weighting components) a certain distance. During the sliding process, the wedge-shaped inclined surface on the inner wall of the release ring simultaneously acts on the shoulder or inclined surface on the inner side of all three locking pins; this force forces all locking pins to retract radially inward in sync, thereby completely disengaging their heads from the locking holes of weighting components one, two, and three, and releasing all three 0.5kg weighting components simultaneously.

[0062] At the same time, the axial movement of the release ring or its linkage mechanism also drives a large buckle or rotary locking device to firmly connect a pre-placed base weight plate to the dumbbell handle body.

[0063] Preferably, each guide groove on the selection plate can be designed with different starting angles and lifts to ensure that the locking pins move in a strict sequence. The return spring can be placed inside the locking pin to ensure reliable pin retraction. The release ring can be automatically coupled with the final stage of the handle rotation via a ramp or cam mechanism to achieve one-button release.

[0064] Example 4:

[0065] This embodiment provides a fine adjustment scheme for dumbbell weight using a combination of different weight-adding components. The adjustment logic is to configure at least two different weight-adding components and perform a replacement action of releasing the light component and driving the heavy component at a specific level to achieve fine adjustment in non-uniform steps.

[0066] Specifically, the dumbbell adjustment mechanism of this embodiment includes a rotatable weight selection disc, multiple independently controllable locking push rods, and a linkage reset mechanism. The weighting components include at least one first weight component (e.g., 0.5 kg) and at least one second weight component (e.g., 1 kg), both of which are independent counterweights with locking holes on their sides for the locking push rods to be inserted.

[0067] The selector plate is coaxially fixed with the rotating handle. Its surface has several cam grooves of a specific shape. Each cam groove controls the radial movement of a locking push rod. The locking push rod is normally retracted under the action of a return spring, and its head can be inserted into the locking hole of the corresponding weighting component. A linkage reset mechanism can be triggered at the highest gear position to synchronously release all locking push rods.

[0068] Taking four-speed adjustment as an example, its working principle is as follows:

[0069] In the initial state (gear 0), the rotating handle is in the initial position, all locking push rods are retracted by the return spring, not connected to any weighting components, and the dumbbells are at their base weight.

[0070] In the first position, rotate the handle to the first position. The weight selection plate rotates accordingly, and the first cam groove pushes the first locking push rod to extend radially against the spring force, so that its head inserts into the locking hole of the first weight component (0.5kg) on ​​the left and right sides, locking it and lifting it up. At this time, the total weight of the dumbbells increases by 1kg (0.5kg on each side).

[0071] In the second position, continue rotating the handle to the second position. The weight selection disc continues to rotate. At this time, the first cam groove enters a descending or reset zone, causing the first locking push rod to retract, thereby releasing the 0.5kg components on both sides. Simultaneously, the second cam groove starts working, pushing the second locking push rod to extend radially and insert into the locking holes of the second weight components (1kg) on ​​both sides, locking them and lifting them up. This position achieves weight replacement, increasing the total dumbbell weight from 1kg to 2kg (compared to the base weight).

[0072] In the third position, rotate the handle to the third position, and the weight selection plate rotates further. At this time, the first cam groove enters the working section again, pushing the first locking push rod to extend and locking the 0.5kg component again. At the same time, the second cam groove is still in the holding section, and the second locking push rod remains extended. Thus, the first weight component (0.5kg) and the second weight component (1kg) are locked at the same time, and the total weight of the dumbbells increases by 3kg (1.5kg + 2kg on both sides).

[0073] In the fourth position, rotate the handle to the fourth position (highest position or cycle start position). The weight selection plate triggers the linkage reset mechanism. This mechanism forces all locking push rods to retract synchronously, releasing all locked weight components (0.5kg and 1kg components). At the same time, this linkage action drives a preset base weight plate (e.g., 2kg or 5lb plate) to lock with the handle body through another transmission path, realizing a large-scale weight switching and mode reset.

[0074] Preferably, the cam groove on the weight selection plate can be designed as a lifting and holding profile to control the sequence of extension, holding, retraction and re-extension of each push rod. The weighting components are not limited to 0.5kg and 1kg, but can also use any two or more weight combinations such as 1kg and 2kg, 5 pounds and 10 pounds to achieve multiple step sequences such as 2kg, 3kg, 5kg, 8kg. The linkage reset mechanism can be linked with the extreme position of the handle rotation to achieve one-button reset.

[0075] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for finely adjusting the weight of dumbbells in multiple ranges, characterized in that, include: The transmission structure is driven to move by rotating the handle (1); The transmission structure drives at least two independent weight-bearing components (2) in sequence according to the gear position. Each gear position corresponds to a weight-adding component (2), so that the weight of the dumbbell on one side increases according to the set increment. When rotated to a specific gear, the transmission structure simultaneously releases all the previously driven weight components (2) and drives a preset base weight plate; The method is applicable to dumbbell plates of any weight, and weight subdivision adjustment is achieved by configuring different numbers and weights of weight-adding components (2).

2. The method for finely adjusting the weight of a dumbbell in multiple positions according to claim 1, characterized in that: The transmission structure includes a spiral disk and a hook mechanism. The rotating handle (1) drives the spiral disk to rotate step by step, and the hooks on it hook the weighted components (2) on the left and right sides in sequence.

3. The method for finely adjusting the weight of a dumbbell in multiple positions according to claim 1, characterized in that: The transmission structure includes a cam group and a transverse pin group. Rotating the handle (1) drives the cam to push out the corresponding transverse pins in sequence, so that the pins are inserted into the grooves of the corresponding weighting components (2).

4. The method for finely adjusting the weight of a dumbbell in multiple positions according to claim 1, characterized in that: The weighting component (2) is an add-on block independent of the main dumbbell plate, and its weight is 0.5 kg, 1 kg, 2 kg, 5 lbs, 10 lbs or other subdivided weight units.

5. A dumbbell, characterized in that, The weight adjustment is achieved by using the multi-level fine adjustment method for dumbbell weight as described in any one of claims 1-4.

6. A dumbbell adjustment mechanism, characterized in that, The device includes a rotating handle (1), a transmission structure, and multiple independent weight-adding components (2). The transmission structure is configured to sequentially drive or release the weight-adding components according to the gear position when performing the method described in any one of claims 1-4, thereby achieving multi-level fine adjustment of the dumbbell weight.

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