An adjustable modular combination dumbbell structure

Abstract

The utility model relates to an adjustable modular combined dumbbell structure, including holding rod and a plurality of counterweight module who stacks in the counterweight module holding rod axial direction direction holding rod end part, the counterweight module includes base, annular adjusting spare, counterweight piece and end cover, annular adjusting spare one side movably sets up on the base outer wall, and moves between locking position and unlocking position, the other side forms annular limiting portion and bends to the inside, the inner end surface of annular limiting portion has a annular limiting groove, the annular limiting groove has a limiting protrusion, the one end of base close to end cover is first end, the end surface of base first end has the limiting recess for the limiting protrusion to enter, the first end of base stretches into the annular limiting groove, and when annular adjusting spare moves to the unlocking position, the limiting protrusion enters the limiting recess, the outer end surface of annular limiting portion is opened to the outside of end cover limiting groove with the positioning groove that the dovetail block passes through enters the dovetail groove in one, the utility model reduces the probability of adjusting spare torsional deformation, prolongs the life.

Description

Technical Field

[0001] This utility model relates to the field of dumbbell technology, and in particular to an adjustable modular combination dumbbell structure. Background Technology

[0002] Dumbbells are a popular and common piece of fitness equipment. Conventional dumbbells have fixed weights, meaning each dumbbell has its own weight. Later, adjustable weight dumbbells were developed. The most common way to add weight is by adding weight plates, which are then fixed to the original dumbbell structure using pins. This method of adding weight by installing weight plates with pins is inefficient and cumbersome.

[0003] Chinese invention patent CN117258219A discloses an adjustable modular dumbbell structure, including a handle and a counterweight module. The counterweight module is located at both ends of the handle. A base counterweight unit is set at both ends of the handle as the basic structure of the dumbbell. The modular counterweight unit can be quickly installed and removed from the end of the base counterweight unit. The structure of the modular counterweight unit is basically similar to that of the base counterweight unit. During installation, the base adjustment component is manually driven to compress the base spring, opening the dovetail groove. The dovetail block of the modular counterweight unit is embedded in the dovetail groove. When the base adjustment component is released, the inner wall of the base adjustment component seals the opening of the dovetail groove under the action of the base spring, locking the base unit to prevent detachment. This dumbbell structure improves the modularity of the dumbbell structure and is very convenient and quick to adjust.

[0004] The aforementioned dumbbell structure still has some drawbacks: the base adjustment component of the dumbbell structure is usually made of rigid plastic. Since the base adjustment component is nested on the outer contour of the base, there is a lack of circumferential positioning structure between the base adjustment component and the base. During long-term use, frequent movement of the base adjustment component for counterweight adjustment makes it very easy for the base adjustment component to undergo torsional deformation, which leads to increased sliding friction between the base adjustment component and the base, and may even cause it to get stuck, thus shortening its service life.

[0005] Therefore, this utility model proposes an adjustable modular combination dumbbell structure to solve the above problems. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide an adjustable modular combination dumbbell structure that reduces the probability of torsional deformation of the adjustment components and extends service life.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: an adjustable modular combination dumbbell structure, including a grip bar and several counterweight modules stacked at the ends of the grip bar along the axial direction of the grip bar; the counterweight module includes a base, an annular adjusting member, a counterweight plate, and an end cap. The end cap is connected to the base by bolts and fixes the counterweight plate inside the base. One side of the annular adjusting member is movably fitted onto the outer wall of the base and moves between a locked position and an unlocked position. The other side is bent inward to form an annular limiting part. An end cap limiting groove is formed in the middle of the outer end face of the annular limiting part. The end cap is movably embedded in the end cap limiting groove. The inner end face of the annular limiting part is connected to the base by a spring; each pair of adjacent counterweight modules is detachably connected by a dovetail groove structure. The dovetail groove structure includes matching dovetail blocks and dovetail grooves. In the two adjacent counterweight modules, one of the counterweight modules... A dovetail block is set on the base of the block, and a dovetail groove is opened on the end cap of another counterweight module. The opening of the dovetail groove is located on the side wall of the end cap. When the annular adjusting member moves to the locked position under the action of the spring force, the bottom surface of the end cap limiting groove of the annular limiting part presses against the inner end face of the end cap, and the side wall of the end cap limiting groove blocks the opening of the dovetail groove. When the annular adjusting member moves to the unlocked position against the spring force, the side wall of the end cap limiting groove moves away from the dovetail groove, so that the opening of the dovetail groove is opened. Its innovation is that: the inner end face of the annular limiting part has an annular limiting groove, and the annular limiting groove has a limiting protrusion. The end of the base near the end cap is the first end. The end face of the first end of the base has a limiting groove for the limiting protrusion to enter. The first end of the base extends into the annular limiting groove, and when the annular adjusting member moves to the unlocked position, the limiting protrusion enters the limiting groove. The outer end face of the annular limiting part has a positioning groove on the outer side of the upper cover limiting groove, which allows the dovetail block to pass through and enter the dovetail groove. The opening of the positioning groove is located on the outer side wall of the annular adjusting part.

[0008] Furthermore, the connection between the annular limiting groove sidewall at the limiting protrusion and the inner end face of the annular limiting part is transitioned by a chamfer.

[0009] Furthermore, both sidewalls of the limiting protrusion are inclined surfaces, and the inclined surfaces are inclined from the connection with the bottom surface of the annular limiting groove towards the center of the limiting protrusion.

[0010] Furthermore, each of the two side walls at the opening of the dovetail groove has a guide slope, which slopes from the connection with the side wall of the end cap toward the direction close to the central axis of the grip.

[0011] Furthermore, the inner wall of the base is inclined from the connection point with the first end face towards the central axis of the grip.

[0012] The advantages of this utility model are: This invention features an annular limiting groove on the inner end face of the annular limiting part of the dumbbell structure's annular adjustment component. During the movement of the annular adjustment component, the first end of the base remains positioned within the annular limiting groove. When the annular adjustment component moves to the unlocked position for counterweight adjustment, the limiting protrusion enters the limiting groove, achieving relative positioning between the inner side of the annular adjustment component and the base. Furthermore, utilizing the positioning groove on the annular limiting part, when inserting or removing the dovetail block of the adjacent counterweight module, since the two sides of the dovetail block are respectively located in the positioning groove and the dovetail groove, relative positioning between the outer side of the annular adjustment component and the end cap is achieved. This enables bidirectional positioning of both the inner and outer sides of the annular adjustment component during counterweight adjustment, thereby improving the structural stability of the dumbbell structure during counterweight adjustment, reducing the probability of deformation of the annular adjustment component, and extending its service life.

[0013] In this invention, the connection between the side wall of the annular limiting groove at the limiting protrusion and the inner end face of the annular limiting part is transitioned by a chamfer. As the limiting protrusion moves into the limiting groove with the annular adjusting member, it avoids the outer edge of the inner end face of the annular limiting part from abutting against the inner edge of the first end face of the base, thus preventing jamming.

[0014] This invention sets both sides of the limiting protrusion as inclined surfaces. As the limiting protrusion moves into the limiting groove with the annular adjusting member, it guides the limiting protrusion, preventing it from getting stuck. Even if the annular adjusting member undergoes slight torsional deformation, it can be corrected during the guiding movement of the limiting protrusion using the inclined surfaces.

[0015] This invention guides the movement of the dovetail blocks by setting guide slopes on the two side walls at the opening of the dovetail groove, thereby enabling the dovetail blocks of adjacent counterweight modules to enter the dovetail groove more smoothly and quickly.

[0016] The inner wall of the base of this utility model is inclined from the connection with the first end face towards the central axis of the grip rod. While improving the structural strength of the base, the opening size of the annular limiting groove is reduced accordingly to ensure the structural strength of the annular adjusting component. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the adjustable modular combination dumbbell structure of this utility model.

[0019] Figure 2 This is an axial cross-sectional view of the adjustable modular combination dumbbell structure of this utility model.

[0020] Figure 3 This is an enlarged view of section A of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the annular adjusting component of this utility model.

[0022] Figure 5 This is an axial cross-sectional view of the annular adjusting component of this utility model.

[0023] Figure 6 This is a cross-sectional view along the BB direction of the annular adjusting component of this utility model.

[0024] Figure 7 This is a schematic diagram of the base of this utility model.

[0025] Figure 8 This is a schematic diagram of the counterweight module of this utility model.

[0026] Figure 9 This is an enlarged view of section C of this utility model. Detailed Implementation

[0027] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0028] Example This embodiment provides an adjustable modular dumbbell structure, such as Figure 1-9 As shown, it includes a grip bar 1 and several counterweight modules 2 stacked at the end of the grip bar 1 along the axial direction of the grip bar 1.

[0029] The counterweight module 2 includes a base 21, an annular adjusting member 22, a counterweight plate 24, and an end cap 23. The counterweight plate 24 is installed inside the base 21. One side of the annular adjusting member 22 is movably fitted onto the outer wall of the base 21 and moves between a locked position and an unlocked position. The other side is bent inward to form an annular limiting part a. An end cap limiting groove 223 is formed in the middle of the outer end face of the annular limiting part a. The end cap 23 is movably embedded in the end cap limiting groove 223 and is connected to the base 21 by bolts 26, which fix the counterweight plate 2424 inside the base 21. The inner end face of the annular limiting part a is connected to the base 21 by a spring 25. The base 21 has an assembly column for installing the spring 25. The spring 25 is fitted onto the outer side of the assembly column, and both ends of the spring 25 abut against the inner end faces of the base 21 and the annular limiting part a, respectively.

[0030] Each pair of adjacent counterweight modules is detachably connected by a dovetail groove structure, which includes matching dovetail blocks 211 and dovetail grooves 231. In the two adjacent counterweight modules, a dovetail block 211 is provided on the base 21 of one counterweight module, and a dovetail groove 231 is provided on the end cap 23 of the other counterweight module, with the opening of the dovetail groove 231 located on the side wall of the end cap 23.

[0031] When the user manually pushes the ring adjustment piece 22 to move to the unlocked position against the elastic force of the spring 25, the side wall of the end cap limiting groove 223 moves away from the dovetail groove 231, so that the opening of the dovetail groove 231 is opened, and the dovetail block of the adjacent counterweight module can be taken out from the dovetail groove 231, thereby reducing the weight of the dumbbell structure. When it is necessary to increase the weight of the dumbbell structure, the user manually pushes the annular adjustment component 22 to move to the unlocked position against the elastic force of the spring 25, inserts the dovetail block of the added counterweight module into the dovetail groove, and releases the annular adjustment component 22. When the annular adjustment component 22 moves to the locked position under the elastic force of the spring 25, the bottom surface of the end cap limiting groove 223 of the annular limiting part a presses against the inner end surface of the end cap 23, and the side wall of the end cap limiting groove 223 seals the opening of the dovetail groove 231, thus completing the weight adjustment operation of the dumbbell structure.

[0032] In this embodiment, the inner end face of the annular limiting part a has an annular limiting groove 221, and the annular limiting groove 221 has a limiting protrusion 222. The end of the base 21 near the end cover 23 is the first end. The end face of the first end of the base 21 has a limiting groove 212 for the limiting protrusion 222 to enter. The first end of the base 21 extends into the annular limiting groove 221, and when the annular adjusting member 22 moves to the unlocking position, the limiting protrusion 222 enters the limiting groove 212. The outer side of the limiting groove of the end cover 23 on the outer end face of the annular limiting part a has a positioning groove 224 for the dovetail block 211 to pass through and enter the dovetail groove 231. The positioning groove 224 is located at the limiting protrusion 222, and the opening of the positioning groove 224 is located on the outer side wall of the annular adjusting member 22.

[0033] In this embodiment, the connection between the side wall of the annular limiting groove 221 at the limiting protrusion 222 and the inner end face of the annular limiting part a is transitioned by a chamfer a1. During the process of the limiting protrusion 222 moving into the limiting groove 212 with the annular adjusting member 22, the outer edge of the inner end face of the annular limiting part a is prevented from abutting against the inner edge of the first end face of the base 21, thus avoiding jamming.

[0034] Both sides of the limiting protrusion 222 are inclined surfaces a2. The inclined surfaces a2 are inclined from the connection with the bottom surface of the annular limiting groove 221 towards the middle of the limiting protrusion 222. During the process of the limiting protrusion 222 moving into the limiting groove 212 with the annular adjusting member 22, the limiting protrusion 222 is guided to avoid the limiting protrusion 222 from getting stuck. Even if the annular adjusting member 22 is slightly torsional, it can be corrected during the process of the limiting protrusion 222 being guided by the inclined surfaces a2.

[0035] Each of the two side walls at the opening of the dovetail groove 231 has a guide slope 232. The guide slope 232 slopes from the connection with the side wall of the end cap 23 towards the central axis of the grip. The guide slope 232 can guide the movement direction of the dovetail block 221, so that the dovetail block 221 of the adjacent counterweight module can enter the dovetail groove 231 more smoothly and quickly. The inner side wall 213 of the base 21 slopes from the connection with the first end face towards the central axis of the grip 1. While improving the structural strength of the base 21, the opening size of the annular limiting groove 221 is reduced accordingly, ensuring the structural strength of the annular adjusting member 22.

[0036] During the movement of the annular adjustment component 22, the first end of the base 21 is always positioned within the annular limiting groove 221. When the annular adjustment component 22 moves to the unlocked position for counterweight adjustment, the limiting protrusion 222 enters the limiting groove 212, achieving relative positioning between the inner side of the annular adjustment component 22 and the base 21. When inserting or removing the dovetail block of the adjacent counterweight module, since the two sides of the dovetail block 221 are located in the positioning groove 224 and the dovetail groove 231 respectively, relative positioning between the outer side of the annular adjustment component 22 and the end cap 23 is achieved. This achieves bidirectional positioning of the inner and outer sides of the annular adjustment component 22 during counterweight adjustment, thereby improving the structural stability of the dumbbell structure during counterweight adjustment, reducing the probability of deformation of the annular adjustment component 22, and extending its service life.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An adjustable modular dumbbell structure, comprising a grip bar and several counterweight modules stacked along the axial direction of the grip bar at its ends; each counterweight module includes a base, an annular adjusting member, a counterweight plate, and an end cap. The end cap is connected to the base by bolts and fixes the counterweight plate within the base. One side of the annular adjusting member is movably fitted onto the outer wall of the base and moves between a locked position and an unlocked position. The other side is bent inward to form an annular limiting portion. An end cap limiting groove is formed in the middle of the outer end face of the annular limiting portion. The end cap is movably embedded in the end cap limiting groove. The inner end face of the annular limiting portion is connected to the base by a spring. Each pair of adjacent counterweight modules is connected by a... The dovetail groove structure is detachably connected. The dovetail groove structure includes matching dovetail blocks and dovetail grooves. In two adjacent counterweight modules, a dovetail block is mounted on the base of one counterweight module, and a dovetail groove is formed on the end cap of the other counterweight module. The opening of the dovetail groove is located on the side wall of the end cap. When the annular adjusting member moves to the locked position under the action of a spring, the bottom surface of the end cap limiting groove of the annular limiting part presses against the inner end face of the end cap, and the side wall of the end cap limiting groove seals the opening of the dovetail groove. When the annular adjusting member moves to the unlocked position against the spring force, the side wall of the end cap limiting groove moves away from the dovetail groove, allowing the dovetail groove opening to open. Its characteristic is: The inner end face of the annular limiting part has an annular limiting groove, and the annular limiting groove has a limiting protrusion. The end of the base near the end cover is the first end. The end face of the first end of the base has a limiting groove for the limiting protrusion to enter. The first end of the base extends into the annular limiting groove, and when the annular adjusting member moves to the unlocking position, the limiting protrusion enters the limiting groove. The outer end face of the annular limiting part has a positioning groove on the outer side of the upper cover limiting groove, which allows the dovetail block to pass through and enter the dovetail groove. The opening of the positioning groove is located on the outer side wall of the annular adjusting part.

2. The adjustable modular combination dumbbell structure according to claim 1, characterized in that: The connection between the annular limiting groove sidewall at the limiting protrusion and the inner end face of the annular limiting part is achieved through a chamfer transition.

3. The adjustable modular combination dumbbell structure according to claim 1, characterized in that: Both sides of the limiting protrusion are inclined surfaces, and the inclined surfaces are inclined from the connection with the bottom surface of the annular limiting groove towards the middle of the limiting protrusion.

4. The adjustable modular combination dumbbell structure according to claim 1, characterized in that: Each of the two side walls at the opening of the dovetail groove has a guide slope, which slopes from the connection with the side wall of the end cap toward the central axis of the grip.

5. The adjustable modular combination dumbbell structure according to claim 1, characterized in that: The inner wall of the base slopes towards the central axis of the grip bar from the point of connection with the first end face.

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