Exercise devices – Striking
Patent
1996-01-05
2000-01-04
Donnelly, Jerome
Exercise devices
Striking
482109, 473564, 473168, 446473, A63H 3300, A63B 6902
Patent
active
06010435&
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a soft sword, a soft spear, and a soft rod, which are used for sport chanbara (a registered trademark), namely a kind of the art of self-defense.
BACKGROUND OF THE PRESENT INVENTION
A soft sword (a), a soft spear (b), and a soft rod (c), as shown in FIG. 23, have been used for sport chanbara, which is rapidly spreading as the art of self-defense (fencing) in recent years, in order not to require a protector.
In the prior arts, for example, a soft sword consists of a stem 91, urethane 92 rolled round the stem 91, a bag 93, which is made of cloth or leather, and covers the urethane 92 as shown in FIG. 24.
Thanks to the elasticity of the urethane 92, this soft sword is free from hurting the opponent, therefore, it is very favorable.
However, this soft sword has the following problems:
(1) The irregularity of the quality of the urethane and others makes the performance of the soft swords irregular, so it may cause much unfairness in a match.
(2) The urethane must be exchanged for new one once in six months or so, because it becomes stiff while used. However, in case the user does not exchange the urethane for new one and uses the soft sword long, an accident may happen.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a soft sword and a soft rod, which are uniform in quality and undergo less degradation, by using gas as a elastic material instead of urethane.
In order to achieve the object, a soft sword of the present invention is formed as follows:
(1) A soft sword comprising: section, which is made of a sealing and elastic material and the opening of which is fitted onto and closely attached to a tip end of said grip; wherein said sword blade section is filled with gas to define a cavity.
Furthermore, in order that said sword blade section is to be more stable, a soft sword is formed as follows: which is made of a sealing and elastic material and the opening of which is fitted onto and closely attached to a tip end of said grip; and an inner stem, which continues to said grip and protrudes inside said sword blade section; wherein said sword blade seciton is filled with gas to define a cavity.
In this soft sword, it does not matter which is the thicker, said inner stem or said grip. The length of said inner stem is changeable as far as it goes in said sword blade section.
It is possible either that said inner stem and said grip is made of the same material or that said inner stem is made of a softer material than said grip and adheres to said grip.
(3) A soft sword comprising: made of a sealing and elastic material and the opening of which is fitted onto and closely attached to a tip end of said grip; and a bag-shaped sword blade section, which is made of a sealing and elastic material and covers said inner bag and the opening of which is fitted onto and closely attached to said grip; wherein said inner bag and said sword blade section are filled with gas to define cavities.
In this soft sword, it is favorable that pressure inside said inner bag is higher than that between said sword blade section and said inner bag, because the stability of said sword blade section increases.
Furthermore, in order that said sword blade section is to be still more stable, a soft sword is formed as follows:
(4) A soft sword comprising; which is made of a sealing and elastic material and the opening of which is fitted onto and closely attached to a tip end of said grip; an inner stem, which continues to said grip and protrudes inside said sword blade section; and an outer stem, which exsists inside said sword blade section and rolls round said inner stem; wherein said sword blade section is filled with gas to define a cavity.
In order to be lighter, a soft sword is formed as follows:
(5) A soft sword comprising: a grip section, which is made of the same material as said sword blade section and formed in one body with said sword blade section; wherein said sword blade section and said grip is formed bag-shaped and filled with gas and sealed.
Additio
REFERENCES:
patent: 2669062 (1954-02-01), Baggott
patent: 4080751 (1978-03-01), Copstead
patent: 4328966 (1982-05-01), Miyamoto
patent: 4892303 (1990-01-01), Lohrg
patent: 5127871 (1992-07-01), Miller
patent: 5219163 (1993-06-01), Watson
patent: 5295926 (1994-03-01), Tanabe
patent: 5330403 (1994-07-01), Kuo
patent: 5389033 (1995-02-01), Rauch
patent: 5598596 (1997-02-01), Song et al.
"Sports Chanbara" by Tetsundo Tanabe, President of International Sports Chanbara Assoc. (1994).
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