Impact Absorption Possible Dumbbell and Barbell Disk

Abstract

The present invention relates to an impact absorbing dumbbell and an impact absorbing barbell disk. The impact absorbing dumbbell includes an outer cover prepared by cutting a flexible member into a dumbbell and sewing the cut flexible member, thereby having a dumbbell shape, a cylindrical tubular body installed inside the middle portion of the outer cover for serving as a handle and keeping the dumbbell shape, and weight constituent powder charged in the outer cover. The impact absorbing barbell disk includes an outer cover prepared by cutting a flexible member into a barbell disk and sewing the cut flexible member, thereby having a barbell disk shape, weight constituent powder charged in the outer cover, and a bushing made of metal or synthetic resin, the bushing being inserted and fixed in the central shaft hole of the outer cover.

Description

TECHNICAL FIELD [0001] The present invention relates to a dumbbell and a barbell disk, both being capable of absorbing impact, in which the impact absorbing dumbbell and the impact absorbing barbell disk include a flexible outer cover having a dumbbell shape or a barbell disk shape and are made of synthetic fabric, natural fabric or synthetic rubber, and weight constituent powder, such as iron powder or sand, charged in the flexible outer cover. The dumbbell and the barbell disk further include a cylindrical tubular body made of synthetic resin, foam resin, sponge, EVA or the like installed inside or outside the dumbbell, and serving as a handle of a dumbbell, or a bushing installed in a central hole of the outer cover having a doughnut shape and made of synthetic resin or metal. BACKGROUND ART [0002] A general dumbbell was made by processing iron, and was structured such that weights are coupled to both ends of a cylindrical bar, which can be easily held with the hands. The convent...

AI Technical Summary

Benefits of technology

[0015] As known from the above description, the impact absorbable dumbbell and the impact absorbable barbell disk according to the present invention have excellent ability to absorb impact and overcome the problem of the conventional dumbbell and barbell disk, which can only slightly alleviate impact but cannot completely absorb impact. Accordingly, the dumbbell and the barbell disk according to the present invention can prevent a user from being injured when the user drops them on a body part, particularly on the foot, and are almost never broken or damaged when they collide against rigid objects. The dumbbell and the barbell disk according to the present invention can be manufactured at low cost because a molding cast is not necessary in a manufacturing process thereof. Accordingly, manufacturers can provide customers with dumbbells and barbell disks with quality and at a price that will ensure competitiveness.

Problems solved by technology

The conventional dumbbell has the disadvantage of easily rusting.

Aluminum, which is the material generally used for manufacturing the improved dumbbell, has an advantage of being relatively cheap with respect to other metals, but the improved dumbbell made by molding has the disadvantage of being brittle, so that it can easily break when it is dropped.

Thus, there is a problem in that a user can be harmed by broken pieces of the dumbbell, and the manufacturer of the dumbbell must compensate for damages, due to the product liability (PL) law, when a user is injured.

Further, if the dumbbell is dropped on a body part of a user, such as the top of a foot, the body part can be injured or broken.

However, this dumbbell, which can overcome the disadvantage of the brittle dumbbell made of metal through a molding method, also has the disadvantage of not being able to absorb impact when the dumbbell is dropped.

However, in all the above described dumbbells, the outer covers of the dumbbells are made of synthetic resin through an extrusion molding method, and the outer covers made by the extrusion molding method are not flexible but rigid.

Accordingly, when the dumbbells are dropped on a body part of a user, the dumbbells cannot completely absorb impact that could cause damage to a user's body part, but only alleviate the degree of impact applied to a user.

Accordingly, even though the outer cover is charged with iron powder or sand, the dumbbell poorly absorbs impact because the contour of the outer cover does not change in response to an external pressure.

Further, since a molding cast is needed to manufacture a synthetic resin outer cover of the dumbbell through an extrusion molding method, the manufacturing cost is high because when expense is incurred when preparing the molding cast is incurred.

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