1. Field of the Invention
The present invention relates a hammer for physical exercises and more particularly to such a hammer that is practical for exercising the muscles of the hands and the waist and practicing the skill of keeping the body in balance.
2. Description of the Related Art
A conventional hammer for physical exercises comprises a ball, a handle, and a connecting wire connected between the ball and the handle. The ball is stuffed with metal weights, ferrous sands, water or any of a variety of heavy substances to increase the weight. This ball does not rebound when hit a wall. Further, the center of the gravity of the ball may be not at the true center of the ball. It is dangerous to play with a hammer of this design.
The present invention has been accomplished under the circumstances in view. It is one object of the present invention to provide a hammer, which is practical for exercising the muscles of the hands and the waist. It is another object of the present invention to provide a hammer, which is practical and safe in use for exercising the skill of keeping the body in balance. To achieve these and other objects of the present invention, the hammer comprises ball, which comprises a spherical outer shell, two inflatable inner tubes mounted inside the spherical outer shell, and a rigid center tube fixedly fastened to the spherical outer shell, and an operating cord member fixedly fastened to the center tube of the ball for operation with the hands to swing the ball or to hit the ball against a wall.
Referring to
The spherical outer shell 13 has a predetermined thickness and weight so that the ball 10 can be made in, for example, 2 KG, 4 KG, or 10 KG.
An operating cord member 20 is inserted through the center tube 14 of the ball 10, and made to have a first knot 21 stopped at one end of the center tube 14 and a second knot 21′ stopped at the other end of the center tube 14. After connection of the operating cord member 20 to the center tube 14, the ball 10 forms with the operating cord member 20 the designed hammer.
When in use, the user can hold one end of the operating cord member 20 to swing the ball 10 over the head (see
Although a particular embodiment of the invention has been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention.