JPH0418592Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is applicable to golf, tennis, baseball bats, etc.
This invention relates to ball-hitting exercise equipment used in ball-hitting competitions.

BACKGROUND TECHNOLOGY Conventionally, this kind of ball-hitting sports equipment has been made by having a ball-hitting part and a grip part connected to each other directly or through a handle part, and the grip part being made by wrapping an outer covering material such as leather around a hard base. A so-called grip tape made of a laminated skin layer and a foam layer, as seen in Japanese Utility Model Application Publication No. 56-59062 and Japanese Patent Application Publication No. 62-32043, was used to wrap the grip.

Problems that the invention aims to solve: These types of ball-hitting sports equipment, especially those with long handles, hit incoming balls or stationary balls with great force, which creates a large impact force on the palm of the hand. ,
Doing so may twist your wrist or put excessive strain on your elbow, etc.

Also, if you don't accurately hit the center of the ball, the impact will resonate and be transmitted to the palm of your hand.

Although so-called grip tapes have some effect in dealing with these shocks and vibrations, we have yet to find a product that is satisfactory and that provides both an appropriate grip for the grip and a comfortable feeling when hitting the ball. do not have.

Means for Solving the Problems The present invention provides a grip portion of a ball-hitting exercise device that includes a sheet-like base body having at least one surface made of a flexible material;
This base body has a large number of gel-filled cell parts arranged in parallel, and the gel-filled cell parts are divided by linear division planes so as to be mutually independent, and there are
Penetration according to JIS K 2530-1976 (50g load)
It has a structure in which a gel-filled sheet is wrapped around a gel-like material of about 50 to 200 and filled in such a way that the material bulges out the flexible surface of the gel-filled cell part, and the gel has a penetration of about 50 to 200. The gel-filled cell part filled with a substance like this is used as a buffer layer to disperse and absorb the impact when the ball is hit, and the gel-filled cell part serves as a grip part to provide an appropriate grip feeling and comfort when hitting the ball. It is.

Function The ball-striking exercise device of the present invention has a buffer layer filled with a gel-like substance with a penetration depth of about 50 to 200 in the grip.
The impact upon hitting a ball is dispersed and absorbed by the gel-filled cell portion, which serves as a buffer layer. In addition, the gel-like material itself with a penetration degree of about 50 to 200 deforms in an almost inelastic manner, so it originally has almost no bearing force, but since the gel-like material is fixed inside each gel-filled cell, it can be gripped easily. It exhibits appropriate support force and degree of freedom of deformation as a part, which leads to a comfortable grip and hitting the ball.

Embodiment FIG. 1 is a front view of a tennis racket as an embodiment of the ball-striking exercise device of the present invention.The ball-striking part 10 has an annular handle 11 covered with a net 12 made of resin or the like, and the base of the racket is a bifurcated handle. part 20, which is further connected to the grip part 30 at the base thereof.

The grip portion 30 is provided with a gel-filled sheet 4, which will be described later.
In this embodiment, a gel-filled sheet 40 is wrapped around a grip base 31 that is continuous and integral with the handle 20.
After wrapping, the outer skin 50 is further wrapped.

Note that, in some cases, a hard foamed resin or the like is adhered to the grip base 31 to form the shape of the grip base. Moreover, in the case of this example, the gel-filled sheet was processed into a tape shape and wound around it.
In this sense, the term gel-filled sheet includes a tape-like sheet.

The gel-filled sheet is filled with a gel-like substance with a penetration depth of about 50 to 200 inside the gel-filled cells.
This gel-like substance with a penetration degree of about 50 to 200 is
Silicone gel is well suited because of its stability as a material, and a composite silicone gel made by mixing microscopic hollow spheres into this silicone gel is particularly excellent.

FIG. 2 is a partially cutaway perspective view of a gel-filled sheet 40 as an embodiment of the gel-filled sheet 40, in which 41 is a sheet-like base made of a flexible material;
Reference numeral 2 denotes a gel-filled cell section that is arranged in large numbers in parallel on this base body, and the gel-filled cell sections 42 are divided by linear dividing surfaces 43 so as to be independent from each other, and the inside has a penetration depth of about 50 to 200. The gel-like substance 44 is filled in such a manner that the substance bulges out the surface of the gel-filled cell portion.

Each of the gel-filled cell portions 42 is densely formed in a substantially regular forest shape, and each gel-filled cell portion 42
Each one is filled with a small amount of gel-like material folded inside.

This is an example of a gel-filled sheet.Next, an example of a method for manufacturing a gel-filled sheet from a thin plate-like gel material will be described to provide a further understanding of its structure.

First, it is necessary to manufacture a sheet of gel material, which is a thin plate-like gel-like substance, but this involves manually kneading and defoaming the gel raw materials, pouring them onto glass, etc., and rolling them out with a spatula. Alternatively, appropriate measures may be taken, such as covering with upper and lower films, rolling with rolls, and gelling in a heating furnace.

After that, a coating material such as a synthetic resin film, such as a vinyl chloride film with good heat weldability, or a urethane film that has poor heat weldability but does not change much over time, is then attached to this thin plate-like gel material. A layered gel material sheet. Note that a simple adhesive layer may be interposed instead of heat-welding, and the bonding may be performed using the adhesive force.

Thereafter, this gel material sheet is pressed with a mold and at the same time, the covering materials are heat welded together to form a gel-filled sheet.This method includes high-frequency welding,
Heat press welding, ultrasonic welding, and the like are simple methods.

As a mold at that time, a mold having a welding surface in a fine grid pattern of about 2 to 3 mm square is used. That is, a mold is used in which small square holes with rounded corners are arranged on the entire surface, but the mold is not limited to such a square shape, but may be round, triangular, or other irregular shapes, but in any case, They are almost regularly
Continuous, densely formed. The depth of the hole is made sufficiently deep to provide a space in which the covering material can be deformed so as not to interfere with the formation of the gel-filled cell portion.

During welding, the gel where adhesion lines are formed is
Since the welding surface of the mold breaks the gel, it escapes back and forth and left and right. At this time, the front, back, left, and right are the parts that correspond to the holes in the mold on all sides, but since there is gel that was originally located in this part, the gel that escapes in the front, back, left, and right pushes the gel that was originally located. However, it is thicker than the original thin plate and escapes into the hole of the mold as if it were folded in on itself.

On the other hand, the covering material on the surrounding welding surface overlaps on the front and back sides, and receives heat from the heating means of the welding machine to weld the front and back sides to form a single linear partition surface.

At this time, the covering material corresponding to the hole is stretched by the gel escaping from the front, back, left, and right, and encapsulates the gel, and its surface bulges out into an approximately spherical shape, and as a result, the gel is accommodated in the folded state. A gel-filled cell will be formed.

In this case, for example, in a checkerboard-shaped mold, if one side of the mold is 10 mm or more, it is difficult to expect a filling effect from the weld lines, and the gel material may shift within each gel-filled cell. Since it is easy to occur, it depends on the thickness of the weld muscle and the thickness of the gel layer.
A thickness smaller than this, preferably around 5 mm to 2 mm, is desired to obtain the gel-filled sheet used in the ball-striking exercise device of the present invention. In addition, when the gel material sheet was manufactured using this method with a thickness of 0.5 mm using a checkerboard-shaped mold of approximately 2.5 mm square, an optimal gel-filled sheet was obtained.

The gel-filled sheet shown in Figure 2 was manufactured by using the aforementioned mold only on one side, and using a flat mold for the other mold that overlaps this, so the gel-filled cell portion bulged out on only one side. However, the present invention is not limited to this, and it is also possible to use a mating mold and wrap gel-filled cell portions bulging on both sides.

As described above, the covering material that forms the sheet-like base of the gel-filled sheet needs to be made of a flexible material because at least one side needs to bulge out, while the other is a multilayered material made of cloth or the like. It doesn't matter if it is.

This gel-filled sheet itself has gel-filled cells on the entire surface of the sheet with a penetration depth of 50~
As approximately 200 layers of gel-like material, it exhibits cushioning and vibration-proofing performance comparable to that of a single thick plate-like gel-like material layer. Therefore, if you use a ball-hitting exercise device, such as a tennis racket, in which this gel-filled sheet is wrapped around the grip, the gel-filled sheet will provide cushioning and anti-vibration performance between the grip base and the palm of your hand, allowing you to hit the ball while hitting the ball. It disperses and absorbs the impact, reducing the burden on elbows, etc.
It also attenuates the resonance of the shock and suppresses its transmission to the palm.

In addition, although it is a gel-like substance with a penetration degree of about 50 to 200, which is normally too soft and has poor bearing capacity, this is fixed inside each gel-filled cell, and
The space between the gel-filled cell parts allows the part itself to be bent and crushed to a considerable extent, so when gripping it, it fits well with the unevenness of the palm, making it easy to hold. This leads to a comfortable feel when hitting the ball, and it also reduces the twisting of the wrist when hitting the ball. In the case of the above embodiment, since the outer skin 50 is wrapped around the gel-filled sheet, these degrees and degrees of freedom are optimally adjusted so as not to become excessive.

Although an example of the manufacturing method of the gel-filled sheet has been explained in detail above, the present invention is not limited to this manufacturing method, and the present invention is not limited to the manufacturing method. The gel-like substance is filled into a gel-filled cell portion divided by linear partitions so that the gel-like substance is mutually independent, so as to make the flexible surface of the gel-filled cell portion bulge. Of course, the material and manufacturing method do not matter.

Further, in the above embodiment, a tennis racket has been described, but the ball hitting sports equipment of the present invention is not limited to this, and can be applied to various sports equipment such as golf clubs and baseball bats. For example, even badminton rackets and gateball sticks are effective in terms of ease of holding and prevention of resonance propagation, even if their impact force is not so great.

Effects of the invention As described above, the ball-striking exercise device of the present invention has a cell-filled sheet wrapped around the grip, and the gel-filled sheet has a large number of gel-filled cells arranged in parallel.
The gel-filled cell section is divided into linear sections so as to be independent from each other, and the interior is JIS K
2530-1976 (50g load) is filled with a gel-like substance having a penetration degree of about 50 to 200 so that the substance bulges out the flexible surface of the gel-filled cell part, so this gel-filled cell The ball is used as a buffer layer to disperse and absorb the impact when the ball is hit. In addition, since each gel-like substance is fixed at a fixed location within the gel-filled cell portion, it exhibits an appropriate supporting force and degree of freedom of deformation as a grip portion, providing a comfortable grip and a comfortable feeling when hitting a ball.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the ball-striking exercise device of the present invention, and FIG. 2 is a perspective view showing a partially cut away gel-filled sheet. DESCRIPTION OF SYMBOLS 10...Ball hitting part, 20...Handle part, 30...Grip part, 40...Gel-filled sheet, 41...Base body, 4
2...Gel-filled cell portion, 43...Section surface, 44...
...A gel-like substance with a penetration depth of about 50 to 200.

Claims (1)

[Scope of utility model registration request] It is provided with at least a ball hitting part and a grip part, a gel-filled sheet is wrapped around the grip part, and the gel-filled sheet is provided with a sheet-like base whose at least one surface is made of a flexible material, and a large number of gel-filled sheets arranged in parallel on this base. The gel-filled cell portions are divided by linear partitions so as to be independent from each other, and the interior is JIS K 2530-1976 (50g load).
1. A ball-striking exercise device, characterized in that the material is filled with a gel-like material having a penetration degree of about 50 to 200 so as to bulge out the flexible surface of the gel-filled cell portion.