Dumbbell capable of rapidly adjusting weight

Abstract

The dumbbell capable of rapidly adjusting the weight comprises a main body, the main body comprises a fixing sleeve, fixing bodies, a rotating sleeve and two sets of telescopic mechanisms, the fixing bodies are fixedly arranged at the two ends of the fixing sleeve respectively, the fixing bodies are provided with through holes communicating the two opposite sides of the fixing bodies, and a hollow area of the fixing sleeve is communicated with the through holes to form a containing cavity. The telescopic mechanism comprises a telescopic rod, a first pull rope and a second pull rope, the telescopic rod is telescopically sleeved with the containing cavity, a roller is arranged on the fixing sleeve, one end of the first pull rope is fixed to the telescopic rod and close to the end, away from the fixing body, of the telescopic rod, and the other end of the first pull rope bypasses the roller and is fixed to the rotating sleeve; the fixed sleeve is provided with a window, one end of the second pull rope is fixed to the telescopic rod, and the other end of the second pull rope penetrates through the window to be fixed to the rotating sleeve. The dumbbell is simple in structure, more convenient to produce and assemble and lower in manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment technology, and in particular to a dumbbell with adjustable weight. Background Technology

[0002] China's dumbbell industry has experienced rapid growth in recent years, and the market size is expected to exceed RMB 10 billion by 2025, with a compound annual growth rate of 10%-15%.

[0003] With technological advancements, adjustable dumbbells have emerged on the market. These dumbbells typically consist of multiple weight plates at both ends of a dumbbell bar, secured with bolts and nuts. Users can remove and reassemble the weight plates to change their number, but this process is cumbersome, requiring tools like wrenches and making it inconvenient to use. To address this issue, telescopic dumbbell bars have appeared on the market. These bars allow for weight adjustment by threading different numbers of weight plates onto a telescopic rod. However, current technology commonly uses rack and pinion drives for telescopic rods, as seen in Chinese patent application number 202021369849.3. This rack and pinion design not only complicates the dumbbell's structure but also significantly increases its cost. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a dumbbell with a simple structure and quick weight adjustment, which has the advantage of low cost.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a dumbbell with quickly adjustable weight, comprising a main body, the main body including a fixed sleeve, a fixed body, a rotating sleeve and two sets of telescopic mechanisms, the fixed body being fixedly mounted at both ends of the fixed sleeve, the fixed body having through holes connecting its opposite sides, the hollow area of ​​the fixed sleeve communicating with the through holes to form a receiving cavity, the rotating sleeve being rotatably mounted on the fixed sleeve, the telescopic mechanism including a telescopic rod, a first pull rope and a second pull rope, the telescopic rod being telescopically mounted in the receiving cavity, the fixed sleeve having a roller, one end of the first pull rope being fixed to the telescopic rod and close to the end of the telescopic rod away from the fixed body, the other end of the first pull rope passing around the roller and fixed to the rotating sleeve; the fixed sleeve having an opening, one end of the second pull rope being fixed to the telescopic rod, the other end of the second pull rope passing through the opening and fixed to the rotating sleeve.

[0006] In one embodiment, the end of the rotating sleeve is provided with a plurality of positioning holes, and the side of the fixing body near the rotating sleeve is provided with an elastic plunger that cooperates with the positioning holes.

[0007] In one embodiment, the rotating sleeve and / or the fixed sleeve are provided with indicator markings.

[0008] In one embodiment, the first pull rope and the second pull rope are integrally formed into a single structure.

[0009] In one embodiment, the fixed sleeve has a narrowed section in the middle, the window connects to the empty area of ​​the narrowed section, a rotating ring is installed inside the rotating sleeve, the rotating ring is set corresponding to the narrowed section, and the other end of the first pull rope and the other end of the second pull rope are both fixed on the rotating ring.

[0010] In one embodiment, the outer wall of the fixing sleeve has a first groove arranged along its axial direction, one end of the first groove is connected to the empty area of ​​the reduced diameter section, and a portion of the first pull rope is received in the first groove.

[0011] In one embodiment, a second groove is provided on the outer wall region of the telescopic rod along its axial direction, and a portion of the first pull rope is received in the second groove.

[0012] In one embodiment, the end of the fixing sleeve is provided with an installation port, and the roller is located at the installation port.

[0013] In one embodiment, the inner wall of the fixed sleeve has a guide groove arranged along its axial direction, and the telescopic rod is provided with a guide block that cooperates with the guide groove.

[0014] In one embodiment, the system further includes a bell assembly comprising a plurality of bell blocks having through holes through which the telescopic rod passes.

[0015] The advantages of this invention are as follows: This dumbbell with quick weight adjustment has a novel structure. By rotating the rotating sleeve, the pull rope can be pulled to extend or retract the telescopic rod. Compared with the existing method of using gears and racks to drive the telescopic rod, this dumbbell has a simpler structure, is more convenient to produce and assemble, and has a lower manufacturing cost. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional view of the dumbbell in Example 1;

[0018] Figure 2 This is an exploded view of the dumbbell from Example 1;

[0019] Figure 3 This is a schematic diagram of the fixing sleeve in the dumbbell of Embodiment 1;

[0020] Figure 4 This is a schematic diagram of the structure of the base in Embodiment 1;

[0021] Figure 5 This is a schematic diagram of the structure of the dumbbell and the seat in Example 1.

[0022] Explanation of icon numbers:

[0023] 1. Fixing sleeve; 11. Window opening; 12. Reducing diameter section; 13. First groove; 14. Mounting port; 15. Guide groove;

[0024] 2. Fixed body; 21. Elastic plunger; 22. Limiting groove;

[0025] 3. Rotating sleeve; 31. Positioning hole;

[0026] 4. Telescopic mechanism; 41. Telescopic rod; 411. Second cable groove; 412. Guide block; 42. First pull rope; 43. Second pull rope;

[0027] 5. Receiving cavity;

[0028] 6. Rollers;

[0029] 7. Bell blade assembly; 71. Bell blade block;

[0030] 8. Directional signs;

[0031] 9. Rotating ring; 91. Semi-circular ring structural component;

[0032] 101. First card slot structure; 102. Second card slot structure;

[0033] 20. Seat; 201. Limiting protrusion; 202. Positioning groove. Detailed Implementation

[0034] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] It should be noted that if the embodiments of this utility model involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0037] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0038] Furthermore, if the meaning of "and / or" appears throughout the text, it refers to three parallel solutions. For example, "and / or" includes solution 1, solution 2, and solution 3, which simultaneously satisfy the above conditions. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] Example 1

[0041] Please refer to Figures 1 to 5 The first embodiment of this utility model is: a dumbbell with adjustable weight, which can be either a smart dumbbell or a non-smart dumbbell. The smart dumbbell has a digital display function.

[0042] This adjustable dumbbell includes a main body, which comprises a fixed sleeve 1, a fixed body 2, a rotating sleeve 3, and two sets of telescopic mechanisms 4. The fixed body 2 is fixed to both ends of the fixed sleeve 1. Each fixed body 2 has a through hole connecting its opposite sides. The hollow area of ​​the fixed sleeve 1 communicates with the through hole to form a receiving cavity 5. The rotating sleeve 3 is rotatably mounted on the fixed sleeve 1. Each set of telescopic mechanisms 4 includes a telescopic rod 41, a first pull rope 42, and a second pull rope 43. The telescopic rod 41 is telescopically fitted into the receiving cavity 5, and the two telescopic rods 41 correspond to the receiving cavities at both ends of the fixed sleeve 1. The cavity 5 is provided, and the fixed sleeve 1 is provided with a roller 6. One end of the first pull rope 42 is fixed to the telescopic rod 41, and the fixed part of the first pull rope 42 and the telescopic rod 41 is located near the end of the telescopic rod 41 away from the fixed body 2. The other end of the first pull rope 42 passes around the roller 6 and is fixed to the rotating sleeve 3. The fixed sleeve 1 is provided with a window 11. One end of the second pull rope 43 is fixed to the telescopic rod 41, and the connection point of the second pull rope 43 and the telescopic rod 41 is located away from the fixed part. The other end of the second pull rope 43 passes through the window 11 and is fixed to the rotating sleeve 3.

[0043] The dumbbell, which allows for quick weight adjustment, also includes a weight plate assembly 7, which comprises multiple weight plate blocks 71, each having a through hole through which the telescopic rod 41 passes.

[0044] When the rotating sleeve 3 rotates in one direction, the first pull rope 42 pulls the telescopic rod 41 out of the receiving cavity 5. Depending on the rotation angle of the rotating sleeve 3, the length of the telescopic rod 41 extending is different, resulting in a different number of bell pieces 71 that can be fitted onto the telescopic rod 41. When the rotating sleeve 3 rotates in the opposite direction, the second pull rope 43 pulls the telescopic rod 41 back, reducing the length of the telescopic rod 41 extending, thus reducing the number of bell pieces 71 that can be fitted onto the telescopic rod 41, or even making it impossible to load bell pieces 71.

[0045] To ensure the telescopic rod 41 can maintain relative contact with the rotating sleeve 3 and reduce the chance of accidental rotation of the rotating sleeve 3, the end of the rotating sleeve 3 is provided with multiple positioning holes 31. The side of the fixing body 2 closest to the rotating sleeve 3 is provided with an elastic plunger 21 that mates with the positioning holes 31. When the elastic plunger 21 mates with different positioning holes 31, the number of bell pieces 71 that can be fitted onto the telescopic rod 41 varies. In other embodiments, the elastic plunger 21 may be located at the end of the rotating sleeve 3, and the positioning holes 31 may be located on the fixing body 2.

[0046] To help users clearly know the number of bell pieces 71 that can be fitted onto the telescopic rod 41, the rotating sleeve 3 and / or the fixed sleeve 1 are provided with an indicator 8, which may be a digital gear position, etc.

[0047] To further facilitate the production of dumbbells with quickly adjustable weight, it is preferable that the first pull rope 42 and the second pull rope 43 are integrally formed as a single structure. In this embodiment, the first pull rope 42 and the second pull rope 43 are integrally formed steel ropes, which have the advantage of durability. In other embodiments, the first pull rope 42 and the second pull rope 43 can also be separate structures.

[0048] The fixed sleeve 1 has a narrowed section 12 in the middle. The window 11 connects to the empty area of ​​the narrowed section 12. A rotating ring 9 is installed inside the rotating sleeve 3. The rotating ring 9 is set corresponding to the narrowed section 12. The other end of the first pull rope 42 and the other end of the second pull rope 43 are both fixed on the rotating ring 9. The first pull rope 42 and the second pull rope 43 are indirectly connected to the rotating sleeve 3 through the rotating ring 9, which can facilitate the assembly and production of dumbbells and their subsequent maintenance. Specifically, the rotating ring 9 is composed of two semi-circular ring structural parts 91 spliced ​​together. The rotating ring 9 is fixedly connected to the rotating sleeve 3 by screws or other fasteners.

[0049] The outer wall of the fixing sleeve 1 has a first groove 13 arranged along its axial direction. One end of the first groove 13 connects to the empty area of ​​the reduced diameter section 12, and a portion of the first pull rope 42 is accommodated in the first groove 13. The outer wall of the telescopic rod 41 has a second groove 411 arranged along its axial direction, and a portion of the first pull rope 42 is accommodated in the second groove 411. The first groove 13 and the second groove 411 can effectively avoid and limit the first pull rope 42.

[0050] Optionally, the end of the fixing sleeve 1 is provided with a mounting port 14, and the other end of the first groove 13 is connected to the mounting port 14, with the roller 6 located at the mounting port 14. The roller 6 can prevent the first pull rope 42 from directly contacting the fixing sleeve 1 and causing wear, thus extending the service life of the first pull rope 42 and the fixing sleeve 1.

[0051] The inner wall of the fixed sleeve 1 has a guide groove 15 arranged along its axis. The telescopic rod 41 is provided with a guide block 412 that cooperates with the guide groove 15. The cooperation between the guide groove 15 and the guide block 412 allows the telescopic rod 41 to extend and retract more smoothly, which helps to ensure the working stability of the dumbbell.

[0052] The fixing body 2 has a first locking structure 101 on the side away from the fixing sleeve 1, and a second locking structure 102 on one side of the dumbbell block 71. The other side of the dumbbell block 71 has a second locking structure 102 that cooperates with the second locking structure 102 on another dumbbell block 71. When the telescopic rod 41 is inserted into the through hole of the dumbbell block 71, due to the cooperation of the first locking structure 101 and the second locking structure 102, the dumbbell block 71 can no longer slide along the axis of the telescopic rod 41, thus preventing the dumbbell block 71 from accidentally falling off and ensuring the safety of dumbbell use. In this embodiment, the first locking structure 101 is a locking groove with a triangular cross-section, and the second locking structure 102 is a locking block with a triangular cross-section.

[0053] It also includes a base 20, which has a placement groove for placing the main body and the bell assembly 7. The placement groove has a limiting protrusion 201 and a positioning groove 202. The fixing body 2 has a limiting groove 22 that cooperates with the limiting protrusion 201. The positioning groove 202 is used to position the bell block 71.

[0054] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A dumbbell with quickly adjustable weight, characterized in that: The device includes a main body, which comprises a fixed sleeve, a fixed body, a rotating sleeve, and two sets of telescopic mechanisms. The fixed body is fixed to both ends of the fixed sleeve, and each fixed body has a through hole connecting its opposite sides. The hollow area of ​​the fixed sleeve communicates with the through hole to form a receiving cavity. The rotating sleeve is rotatably fitted onto the fixed sleeve. The telescopic mechanism includes a telescopic rod, a first pull rope, and a second pull rope. The telescopic rod is telescopically fitted into the receiving cavity. The fixed sleeve has a roller. One end of the first pull rope is fixed to the telescopic rod, near the end of the telescopic rod away from the fixed body, and the other end of the first pull rope passes around the roller and is fixed to the rotating sleeve. The fixed sleeve has a window. One end of the second pull rope is fixed to the telescopic rod, and the other end of the second pull rope passes through the window and is fixed to the rotating sleeve.

2. The dumbbell with rapidly adjustable weight according to claim 1, characterized in that: The end of the rotating sleeve is provided with multiple positioning holes, and the side of the fixed body near the rotating sleeve is provided with an elastic plunger that cooperates with the positioning holes.

3. The dumbbell with rapidly adjustable weight according to claim 2, characterized in that: The rotating sleeve and / or fixed sleeve are provided with indicator markings.

4. The dumbbell with rapidly adjustable weight according to claim 1, characterized in that: The first pull rope and the second pull rope are integrally formed into a single structure.

5. The dumbbell with rapidly adjustable weight according to claim 1, characterized in that: The fixed sleeve has a narrowed section in the middle, and the window connects to the empty area of ​​the narrowed section. A rotating ring is installed inside the rotating sleeve, and the rotating ring is set corresponding to the narrowed section. The other end of the first pull rope and the other end of the second pull rope are both fixed on the rotating ring.

6. The dumbbell with rapidly adjustable weight according to claim 5, characterized in that: The outer wall of the fixing sleeve has a first groove arranged along its axis, one end of the first groove is connected to the empty area of ​​the reduced diameter section, and a portion of the first pull rope is accommodated in the first groove.

7. The dumbbell with rapidly adjustable weight according to claim 5, characterized in that: The outer wall region of the telescopic rod is provided with a second groove along its axial direction, and a portion of the first pull rope is accommodated in the second groove.

8. The dumbbell with rapidly adjustable weight according to claim 1, characterized in that: The end of the fixed sleeve is provided with an installation port, and the roller is located at the installation port.

9. The dumbbell with rapidly adjustable weight according to claim 1, characterized in that: The inner wall of the fixed sleeve has a guide groove arranged along its axis, and the telescopic rod is provided with a guide block that cooperates with the guide groove.

10. The dumbbell with rapidly adjustable weight according to claim 1, characterized in that: It also includes a bell assembly, which comprises multiple bell blocks, each bell block having a through hole through which the telescopic rod passes.

Images