A replaceable underwater dumbbell

Abstract

The utility model relates to a replaceable dumbbell in water, including dumbbell bar and the structure same dumbbell head a and dumbbell head b of setting at both ends, dumbbell head a and dumbbell bar between be provided with fixed part for with the dumbbell head a detachable fixed on dumbbell bar, fixed part includes the fixed ring of setting on dumbbell bar, even be provided with a plurality of plug pole on the fixed ring, be provided with the ball head on plug pole respectively, this replaceable dumbbell in water has the advantage that can dismantle, with the auxiliary bandage.

Description

Technical Field

[0001] This utility model relates to a replaceable underwater dumbbell. Background Technology

[0002] Dumbbells are commonly used swimming aids for children learning to swim. Current swimming aids include kickboards, backboards, and dumbbells. Kickboards and backboards are held in front and worn on the back, respectively, both aiding in buoyancy. Backboards don't require holding; they are simply worn on the back. However, removing them in the water is not easy, especially when children can float independently and no longer need the aid. Kickboards avoid this issue, allowing for easy release. However, kickboards are not as child-friendly as they are generally a single piece. While children can grasp the sides of the float board, their hands are often too small, making it difficult to maintain a firm grip. Therefore, dumbbells are a more suitable aid for children learning to swim. The round bar in the middle of the dumbbell is easier for children to grip, and they can hold one dumbbell in each hand to increase buoyancy. However, most modern dumbbells are fixed and cannot be disassembled. The dumbbell heads are attached to both ends of the dumbbell bar and secured with glue, making them irremovable. Once the dumbbell heads wear down, they cannot be replaced. Furthermore, modern dumbbells lack tethering, so beginners who cannot float independently will lose buoyancy if they accidentally let go. Utility Model Content

[0003] The present invention aims to solve the technical problems existing in the prior art, thereby providing a detachable, replaceable underwater dumbbell with auxiliary straps.

[0004] The above-mentioned technical problems of this utility model are mainly solved by the following technical solutions:

[0005] This utility model provides a replaceable underwater dumbbell, including a dumbbell bar and dumbbell heads a and b with identical structures at both ends; a fixing member is provided between the dumbbell head a and the dumbbell bar for detachably fixing the dumbbell head a to the dumbbell bar;

[0006] The fastener includes a retaining ring fitted onto the dumbbell bar, with multiple inserts evenly distributed on the retaining ring, and ball heads provided on each insert.

[0007] Preferably, the dumbbell bar has threads at both ends.

[0008] Preferably, one end of the dumbbell head a is provided with a concave groove; a matching cap nut is provided in the groove.

[0009] Preferably, a gasket is provided at the contact position between the cap nut and the end of the dumbbell head a to improve the sealing of the contact position.

[0010] Preferably, the end of the dumbbell head a that contacts the fixing member is provided with a blind hole corresponding to the insertion rod.

[0011] Preferably, the dumbbell bar is fitted with a connecting sleeve in the middle, and a telescopic rope is provided on the connecting sleeve. A wristband is provided at the other end of the telescopic rope for fixing it to the wrist.

[0012] The beneficial effects of this utility model are:

[0013] By employing a fastener and a blind hole in the dumbbell head, along with a cap nut that threads with the dumbbell bar, the traditional water dumbbell head and bar are glued together and cannot be replaced. This allows for a detachable and replaceable design, enabling the dumbbell head to be replaced based on wear and tear, or different sized dumbbell heads to be installed to achieve varying buoyancy for different body weights. This improves performance and simplifies maintenance. The addition of a wristband design prevents children from accidentally letting go of the dumbbells while learning to swim or from releasing them due to lack of strength, which could lead to insufficient buoyancy, sinking, and other safety hazards. Attached Figure Description

[0014] 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 these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a partially exploded view of the present invention;

[0017] Figure 3-4 This is a partially enlarged schematic diagram of the present invention.

[0018] In the diagram: 1-Dumbbell head a, 2-Connecting sleeve, 3-Dumbbell bar, 4-Dumbbell head b, 5-Telescopic rope, 5-Wrist loop sleeve, 7-Cap nut, 8-Washer, 9-Fixing component, 1.1-Blind hole, 1.2-Groove, 3.1-Thread, 9.1-Fixing ring, 9.2-Plug, 9.3-Ball head Detailed Implementation

[0019] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0020] like Figure 1 As shown, a replaceable underwater dumbbell is mainly used to assist in floating while learning to swim. It includes a dumbbell bar 3 and dumbbell heads a1 and b4 with identical structures at both ends; a fixing member 9 is provided between the dumbbell head a1 and the dumbbell bar 3 to detachably fix the dumbbell head a1 to the dumbbell bar 3.

[0021] See Figure 3 As shown, specifically, the fixing component 9 includes a fixing ring 9.1 sleeved on the dumbbell bar 3, with multiple inserts 9.2 evenly arranged on the fixing ring 9.1, and ball heads 9.3 respectively provided on the inserts 9.2; furthermore, the inserts 9.2 will be directly inserted into the dumbbell head a1. The dumbbell head a1 and the dumbbell bar 3 are both made of EVA material (here, EVA is ethylene-vinyl acetate copolymer, a general-purpose polymer with the molecular formula (C2H4)x·(C4H6O2)y) to keep them floating on the water surface; due to the good elasticity and flexibility of EVA material, the inserts 9.2 can form a transition fit with it after insertion, so that the dumbbell head a1 will not easily detach from the fixing component 9. In this way, the dumbbell head a1 can be initially fixed to the end of the dumbbell bar 3, and later, when the dumbbell head a1 wears out, it can be manually removed from the fixing component 9.

[0022] The dumbbell bar 3 has threads 3.1 at both ends.

[0023] One end of the dumbbell head a1 is provided with a concave groove 1.2; a matching cap nut 7 is provided in the groove 1.2; specifically, the dumbbell head a1 is sleeved on the end of the dumbbell bar 3. In order to fix the dumbbell head a1, the fixing piece 9 is first sleeved on the dumbbell bar 3, and the insert rod 9.2 is inserted into the dumbbell head a1. The ball head 9.3 can fit more tightly with the dumbbell head a1, so that it will not easily fall off. Then, the cap nut 7 is inserted into the groove 1.2, and the cap nut 7 is threaded to the end of the dumbbell bar 3 through the thread 3.1. In this way, the dumbbell head a1 is fixed in one direction from the outside end. With the fixing piece 9, it can be ensured that the dumbbell head a1 is fixed in both directions at the end of the dumbbell bar 3. The dumbbell head can also be replaced by removing the cap nut 7 and applying external force to pull the dumbbell head a1 out of the fixing piece 9.

[0024] A gasket 8 is provided at the contact position between the cap nut 7 and the end of the dumbbell head a1 to improve the sealing of the contact position and prevent water from entering the groove 1.2 during use.

[0025] The end of the dumbbell head a1 that contacts the fixing member 9 is provided with a blind hole 1.1 corresponding to the insertion rod 9.2. More specifically, the depth of the blind hole 1.1 is the same as the height of the insertion rod 9.2. The maximum diameter of the ball head 9.3 is greater than the diameter of the blind hole 1.1, while the diameter of the insertion rod 9.2 is smaller than the diameter of the blind hole 1.1. The diameter of the fixing ring 9.1 is greater than the diameter of the dumbbell head a1. Thus, due to the high elasticity of EVA, although the ball head 9.3 is directly larger than the blind hole 1.1, it can achieve a transitional fit due to the elasticity. The rod 9.2 is inserted into the blind hole 1.1 and is not easily dislodged. The diameter of the rod 9.2 is smaller than that of the blind hole to avoid excessive resistance during insertion. At the same time, the diameter of the retaining ring 9.1 is larger than that of the dumbbell head a1. This way, after the rod 9.2 is inserted, the position where the dumbbell head a1 contacts the retaining ring 9.1 is blocked by the retaining ring 9.1, preventing the dumbbell head a1 from moving towards the middle of the dumbbell bar 3. It should be noted that the retaining ring 9.1 and the dumbbell bar 3 are fixed by a threaded connection.

[0026] The dumbbell bar 3 has a connecting sleeve 2 in the middle, and a telescopic rope 5 is provided on the connecting sleeve 2. A wristband 6 is provided at the other end of the telescopic rope 5 for fixing to the wrist. Furthermore, the wristband 6 is made of elastic cloth or adhesive cloth, so that when learning to swim, there is no need to worry about accidentally or running out of strength and falling off the dumbbell, which can ensure that the dumbbell always provides buoyancy assistance.

[0027] The cap nut 7 has a cross-shaped clip at the top, making it more convenient to use the cap nut.

[0028] The beneficial effects of this utility model are:

[0029] By employing a fastener and a blind hole in the dumbbell head, along with a cap nut that threads with the dumbbell bar, the traditional water dumbbell head and bar are glued together and cannot be replaced. This allows for a detachable and replaceable design, enabling the dumbbell head to be replaced based on wear and tear, or different sized dumbbell heads to be installed to achieve varying buoyancy for different body weights. This improves performance and simplifies maintenance. The addition of a wristband design prevents children from accidentally letting go of the dumbbells while learning to swim or from releasing them due to lack of strength, which could lead to insufficient buoyancy, sinking, and other safety hazards.

[0030] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] 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 this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A replaceable underwater dumbbell, comprising a dumbbell bar (3) and dumbbell heads a (1) and b (4) of identical structure disposed at both ends; characterized in that: A fixing member (9) is provided between the dumbbell head a (1) and the dumbbell bar (3) for detachably fixing the dumbbell head a (1) to the dumbbell bar (3); The fastener (9) includes a fixing ring (9.1) fitted onto the dumbbell bar (3), inserts (9.2) are evenly arranged on the fixing ring (9.1), and ball heads (9.3) are respectively arranged on the inserts (9.2).

2. The replaceable underwater dumbbell according to claim 1, characterized in that: The dumbbell bar (3) has threads (3.1) at both ends.

3. A replaceable underwater dumbbell according to claim 1, characterized in that: One end of the dumbbell head a (1) is provided with a concave groove (1.2); a matching cap nut (7) is provided in the groove (1.2).

4. A replaceable underwater dumbbell according to claim 3, characterized in that: A gasket (8) is provided at the end contact position between the cap nut (7) and the dumbbell head a (1) to improve the sealing of the contact position.

5. A replaceable underwater dumbbell according to claim 1, characterized in that: The end of the dumbbell head a (1) that contacts the fixing member (9) is provided with a blind hole (1.1) corresponding to the insertion rod (9.2).

6. A replaceable underwater dumbbell according to claim 2, characterized in that: The dumbbell bar (3) has a connecting sleeve (2) in the middle, and a telescopic rope (5) is provided on the connecting sleeve (2). A wristband (6) is provided at the other end of the telescopic rope (5) for fixing to the wrist.

Images