JP2532737Y2 - Metal bat - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal bat for the purpose of reducing the impact sound, improving elasticity and reinforcing.

[0002]

2. Description of the Related Art There has been known a metal bat in which a cork cylinder is closely fitted inside a hitting portion of a metal bat (Japanese Utility Model Laid-Open No. 62-119).
971).

[0003]

The conventional metal bat has a problem in that when the thickness of the cork cylinder is reduced, the cork is separated from the viewpoint of strength and the effective elasticity cannot be maintained. However, in the metal bat for softball, the thickness of the cork is usually 10 mm to 15 mm, so that there is a problem that the shape collapses during use as described above.

[0004]

In this invention, however, a porous elastic cylinder such as a cork cylinder or a foamed synthetic resin cylinder is closely fitted in a bat body, and a carbon pipe is fitted and fixed therein. This solves the conventional problem.

That is, the present invention is a metal bat in which a porous elastic cylindrical body is closely fitted inside a hitting portion of a hollow bat body, and a carbon pipe is fitted and fixed to an inner wall thereof. Also, the porous elastic cylinder is a cork cylinder or a foamed synthetic resin cylinder. Next, the carbon pipe is a net tube made of carbon fiber. Further, the foamed synthetic resin is a foamed polyethylene having a foaming ratio of 30 to 40 times (preferably 35 times).

As described above, by fixing the carbon pipe, the porous elastic cylindrical body is reinforced, and the elastic ability can be sufficiently retained, and the durability can be improved.

[0007]

In the present invention, the carbon pipe is inserted and fixed inside the porous elastic cylinder of the bat body, so that the porous elastic cylinder is reinforced and the elasticity and durability are enhanced.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A hitting portion 1a of an inner cavity 2 of a metal bat body 1
The cylindrical body 3 made of foamed polyethylene is closely fitted to the portion corresponding to the above, and the carbon pipe 4 made of carbon mesh is fitted over the entire length of the inner hole 5 of the cylindrical body 3 and is bonded and fixed with an adhesive. . The thickness of the cylindrical body 3 is, for example, 10 mm to 15 mm.
mm, and the thickness of the carbon pipe 4 is 0.3 mm to 0.5 mm.
mm. Although the cylindrical body 3 is tightly fitted over the entire length of the bat body 1 with substantially the same diameter, the bat does not lose its balance because it is lightweight (35 times the foaming ratio). However, if necessary, a balance weight can be inserted into the grip portion 6.

According to the above-described embodiment, the cylindrical body 3 is closely fitted in the bore 2 of the hitting portion, and the carbon pipe 4 is further fitted therein, so that the metal fatigue of the bat body can be minimized. And the durability of the bat can be significantly improved. Furthermore, even if the bat is relatively lightweight, the bat has a large repulsive force due to the maintenance and enhancement of elasticity, and as a result, a flying force can be obtained. Also, since the porous elastic cylinder is relatively lightweight, even if it is closely fitted over the entire length of the diametrical portion of the bat body,
There is no risk of adversely affecting the bat balance.

[0010]

According to the present invention, a porous elastic cylinder is tightly fitted in the hollow of the ball hitting portion of the hollow bat body, so that the bat body is reinforced and a large flying force is obtained, and the cylindrical body is formed. Since it is lightweight, even if it is mounted wide over the entire hitting portion, there is no risk of impairing the balance of the entire bat. Therefore, there is an effect that the entire hitting portion can be used to the maximum. Particularly, since the carbon pipe is inserted and fixed, the elasticity and durability can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention.

FIG. 2 is an enlarged partial cross-sectional view of the same.

3 is an enlarged cross-sectional view taken along the line AA in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bat main body 2 Lumen 3 Cylindrical body 4 Carbon pipe

Claims (4)

(57) [Scope of request for utility model registration] 1. A metal bat in which a porous elastic cylindrical body is closely fitted inside a hitting portion of a hollow bat body, and a carbon pipe is fitted and fixed to an inner wall thereof. 2. The metal bat according to claim 1, wherein the porous elastic cylinder is a cork cylinder or a foamed synthetic resin cylinder. 3. The metal bat according to claim 1, wherein the carbon pipe is a net tube made of carbon fiber. 4. The metal bat according to claim 1, wherein the foamed synthetic resin is foamed polyethylene having a foaming ratio of 30 to 40 times.