Kettlebell and method of manufacturing the same

Abstract

The invention discloses a dumbbell, which comprises a case and a balance weight object filled in the case, wherein the case is provided with an opening. The dumbbell is characterized by also comprising a cover, the cover is arranged at the opening part for sealing the opening, the cover comprises a bottom plate, and a tube wall is arranged on the bottom plate. The cover of the dumbbell disclosed by the invention is provided with the tube wall, the balance weight object in the dumbbell can be combined with the tube wall into a whole after being concreted, and the cover can be prevented from falling. The upper end size of a projecting element arranged on the upright post is smaller than the lower end size, the upright post can be conveniently inserted into the balance weight object, the pulling-out resistance of the upright post can also be increased, and the fixation is firmer. The tube wall is arranged on a bottom cover, the contact area of the bottom cover and the balance weight object is increased, and the fixation is firmer. A clamp groove is arranged on the tube wall, and the stability of the cover on the case is further enhanced. The designed clamp groove can prevent the cover form falling before the balance weight object is concreted. The side wall of a flange adopts the arc-shaped design, and the flange can be conveniently inserted into the case. The area of the cross section surrounded by the tube wall is smaller than the area of the cross section of the bottom plate, so the cover can be inserted into the case for increasing the bonding area of the cover and the balance weight object, and the bottom plate can also be clamped outside the case for completely sealing the opening.

Description

Technical field [0001] The invention relates to a method for manufacturing dumbbells and kettlebells, a blow-molded kettlebell bottom cover and a blow-molded kettlebell containing the same. Background technique [0002] A dumbbell structure includes a shell, and the shell is filled with counterweights. The shell is provided with an opening, and the counterweight is filled into the shell through the opening, and then the opening is sealed with a cover. However, the commonly used cover is glued to the shell, and its installation is not firm and easy to fall off, causing damage to the dumbbell. Especially for kettlebells, the lid is set at the bottom, which makes it easier to fall off. [0003] Dumbbells or kettlebells with a shell structure have a structure for holding, which is called a handle or a handle. Commonly used handles or handles have many shortcomings and deficiencies. One is inconvenience. Especially in winter, the temperature of the handle or handle is often low, an...

AI Technical Summary

Problems solved by technology

One is inconvenience

Especially in winter, the handle or handle tends to be cold, making it very unsuitable for exercise when holding

The second is that the sweat absorption effect is poor. People tend to sweat when exercising. When the sweat flows to the hands or handles, the handles or handles will slip

Especially for injection molded (or blow molded) kettlebells, whose smooth plastic handles tend to slip

Slippery handles or handles can cause the dumbbell or kettlebell to fall out of the exerciser's hand if the handle or handle needs to be held hard and the handle or handle is subject to high forces

Especially with injection molded (or blow molded) kettlebells, which may have to be constantly turned over during use, the slippery plastic handles are more likely to fall out of the exerciser's hands

The third is that the color is single, and it is impossible to set rich colors

Existing injection molding (or blow molding) dumbbells or kettlebells, if you need to set a variety of color patterns, processing is very difficult

Especially when only local areas such as handles or handles need to be colored, processing is more difficult

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