JPH0644439Y2 - Balance sheet for sports equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a balance sheet capable of finely adjusting the weight of sports equipment according to the physical condition of the player, the habit of swinging, and the like.

(Prior Art) The frame material of a tennis racket has been mostly made of wood in the past, but in recent years, it has been diversified into a metal racket made of stainless steel, a FRP racket reinforced with carbon fiber or boron fiber. With such a variety of tennis rackets, it becomes more difficult to select the optimum one from the ready-made rackets. On the other hand, if the tennis racket becomes even lighter and the resilience performance becomes higher, the flight direction of the tennis ball tends to change depending on the player's daily physical condition and swing habits, and good results cannot be obtained using the same racket. Occurs. Further, in golf, the flight direction of the golf ball tends to cause slices and hooks depending on the golfer's swing habit and physique even if the same club is used, and it may not be possible to make an accurate shot with a ready-made club. For this reason, conventionally, a plate-shaped lead balance material that can be adhered has been sold, and the weight of the golf club can be adjusted by attaching it to the back side of the head of the golf club. It can also be used as a tennis racket.

(Problems to be solved by the invention) A conventional balance member is a plate-shaped member having a weight of 1 to 3 g, and it is not possible to finely adjust the balance.
There is also an elongated balance sheet that is cut into a suitable size with scissors, but it is inconvenient because it requires scissors for cutting. Since a decorative film is adhered to the surface of these balance materials, it is not possible to stack the balance materials at desired positions in order to increase the weight.

The present invention was proposed to achieve accurate serve and shot even with off-the-shelf sports equipment.The weight of sports equipment such as a tennis racket or golf club can be adjusted according to the physical condition of Freyer and the habit of swing. The purpose is to provide a balance sheet that can be finely adjusted.

(Means for Solving the Problems) In order to achieve the above object, a balance sheet 1 according to the present invention includes a soft thin metal plate 2 as shown in FIG.
The balance sheet 1 has a pressure-sensitive adhesive layer 3 formed on the back surface of the metal plate and a release film 4 covering the entire surface of the adhesive layer 3, and the balance sheet 1 is a rectangular flat surface such as a rectangle or a square. As the material of the metal plate 2, lead or lead alloy is generally used.
Even if the surface of the metal plate 2 is appropriately treated or printed, it is preferable that a decorative film or the like is not adhered to the surface of the metal plate 2 so that a plurality of the torn-off sheet pieces 1a can be laminated and laminated. The balance sheet 1 is provided with a plurality of V-shaped cuts 5 at predetermined intervals on at least one side, and preferably the opposite sheet side 6, 6 is cut into fine corrugations (see FIG. 1). Instead of the V-shaped cut 5, a plurality of slits 7 and 8 may be provided at predetermined intervals as shown in FIG. 5, and these slits are cuts that extend from the soft metal plate to the release film.

The balance sheet 1 of the present invention is not
A part of the soft metal plate 2 is torn off from the character-shaped cut 5 together with the release film 4, and the film is peeled off from the sheet piece 1a and adhered to a predetermined portion of the sports equipment. Tennis rackets 9 (Fig. 3) and golf clubs 11 (Fig. 4) are generally used as the sports equipment, but in addition to these, badminton rackets, squash rackets, hockey sticks, cricket bats, fishing rods, etc. can be exemplified. .

(Operation) Since the balance sheet 1 according to the present invention is provided with a plurality of V-shaped notches 5 or slits 7, 8 on its side edges at predetermined intervals, the V-shaped notches 5 or slits 7,
Part of the soft metal plate can be easily torn off together with the release film from 8 and the size and weight of the torn sheet piece 1a can be adjusted by changing the position of the V-shaped notch 5 and the slits 7 and 8 and the length of the torn sheet. Just change it. Peel off the peeling film 4 from the torn sheet piece 1a, and attach only the thin metal plate 2 to the designated place of the sports equipment, the racket,
The delicate balance of the club or fishing rod can be adjusted. At this time, the sheet piece 1a can be easily torn from the balance sheet 1 only by the hand, and the metal plate 2 can be bent and easily adhered closely to a predetermined portion of the sports equipment. unnecessary.

(Example) The present invention will be described with reference to the drawings. FIG. 1 shows a balance sheet 1 according to the present invention. The balance sheet 1 includes a thin lead plate that is a soft metal plate 2, a pressure-sensitive adhesive layer 3 formed on the back surface of the lead plate, and a release film 4 that covers the entire surface of the adhesive layer 3. The balance sheet 1 is, for example, a rectangle close to a 7 × 8 cm square, and the thickness of the metal plate 2 is, for example,
0.2 to 0.3 mm. By cutting the opposite side edges 6, 6 of the balance sheet 1 into fine wavy shapes respectively, a plurality of V
The character-shaped notches 5 are provided at equal intervals, and each notch extends from the soft metal plate 2 to the release film 4. For example, the V-shaped notches 5 are provided at intervals of 5 mm on the side edges 6 of both sheets.

In order to manufacture the balance sheet 1 of the present invention, for example, between appropriate rolls, a tape of a release film coated with an adhesive is attached to the back surface of a strip-shaped thin lead sheet, and then the size of each balance sheet is adjusted. In addition, a special cutter can be used to cut it into fine wavy shapes. As a result, a large number of V-shaped cuts 5 can be formed simultaneously with cutting, and the cuts extend from the front surface of the thin lead plate to the back surface of the release film. This thin lead plate does not have a decorative film or the like adhered to its surface so that a plurality of sheets can be laminated and the release film 4 is a commercially available release paper.

The balance sheet 1 of the present invention is attached to a tennis racket 9 (3rd
1), a part of the thin lead plate is torn off together with the release film 4 from an appropriate V-shaped notch 5 as shown by the chain line in FIG.
You get 1a. Next, the film 4 is peeled off from the sheet piece 1a, and the thin lead plate piece is bent so as to surround the top head portion 10 of the racket frame, for example. This thin lead plate can be easily deformed and brought into close contact with the top head portion 10, and hardly peels off from the racket 9 during the game. Sheet piece 1a
When the is attached to the top head portion 10 of the racket 9, the delicate balance of the racket can be adjusted. Tennis racket 9
Similar to, it can be applied to badminton rackets and squash rackets.

FIG. 4 shows another example of use of the balance sheet 1. To attach the balance sheet to the golf club 11 (FIG. 4), for example, as shown by the chain double-dashed line in FIG. A part of the thin lead plate is torn off from the V-shaped notch 5 together with the release film 4 to obtain a relatively small sheet piece 1b. When the film 4 is peeled off from the sheet piece 1b and is deformed and adhered to the back side of the head of the golf club 11, for example, the film is hardly peeled off. When the sheet piece 1b is attached to the back side of the head of the golf club 11, the delicate balance of the club can be adjusted, and if balance adjustment is required again during practice or a match, the sheet piece 1b is overlaid on the back side of the head. You may. By sticking one or a plurality of sheet pieces 1b, the weight of the golf club can be finely adjusted according to the golfer's swing habit, the hardness of the golf club shaft, or the swing balance. A precise flight direction can be achieved and maintained. Similar to the golf club 11, it can be applied to hockey sticks, cricket bats, and the like.

FIG. 5 shows a modified example of the present invention, in which the balance sheet 13 has a soft metal plate 14, a pressure-sensitive adhesive layer and a release film.
The balance sheet 13 is, for example, an 8 × 8 cm square, and the thickness of the metal plate 14 is, for example, 0.2 to 0.3 mm. A plurality of slits 7 or 8 are provided at equal intervals on opposite sides 15 and 16 of the balance sheet 13, and each slit extends from the soft metal plate 14 to the release film. For example, the slits 7 on the seat side 15 are provided at intervals of 2 mm, and the seat side 16
Although the slits 8 are provided at 5 mm intervals, both slits may be equally spaced.

In order to manufacture the balance sheet 13, a release film tape is attached to the back surface of a thin lead sheet with an adhesive between appropriate rolls, and then cut linearly to the dimensions of each balance sheet. Next, a large number of equally spaced slits 7 and 8 are formed, and the slits extend from the front surface of the thin lead plate to the back surface of the release film.

(Effect of the Invention) Since the balance sheet according to the present invention is provided with a plurality of V-shaped cuts or slits at a predetermined interval on at least one side, it is possible to reduce the thickness of the thin V-shaped metal plate from the appropriate V-shaped cuts or slits. The part can be easily torn off together with the release film. The delicate balance of rackets, clubs, bats, fishing rods, etc. can be adjusted simply by peeling off the release film from the metal plate of the torn sheet pieces and attaching the metal plate to a predetermined portion of the sports equipment. Since the balance sheet of the present invention is thin overall, it can be torn into pieces by hand only. If the V-shaped notch or slit position is changed, the size of the sheet pieces can be easily adjusted. No equipment needed.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a balance sheet according to the present invention, FIG. 2 is a side view of the balance sheet seen from the direction of the arrow in FIG. 1, and FIG. FIG. 4 is a plan view showing a state in which a large sheet piece is attached to a tennis racket, and FIG. 4 is a partial side view showing a state in which a relatively small sheet piece torn off from a balance sheet of the present invention is attached to a golf club. The drawing is a plan view showing a modification of the present invention. 1 ... Balance sheet, 2 ... Soft metal plate, 3 ... Pressure-sensitive adhesive layer, 4 ... Release film, 5 ... V-shaped notch, 6,6 ... Side of opposite sheet, 7,8 ... Slit, 9 ...
Tennis racket, 11 …… Golf club.

Claims (3)

[Scope of utility model registration request] 1. A rectangular balance sheet constituting a soft sheet piece to be attached to sports equipment such as a tennis racket and a golf club, comprising a thin soft metal plate and a pressure-sensitive adhesive formed on the back surface of the metal plate. Layer and a release film covering the entire surface of the adhesive layer, and a plurality of V-shaped cuts are provided at a predetermined interval on at least one side, and when used, a part of the soft metal plate is cut from any of the V-shaped cuts. A balance sheet for sports equipment that is torn off together with a release film. 2. The balance sheet according to claim 1, wherein a plurality of V-shaped cuts are formed at equal intervals on the opposite side by cutting each side of the opposite sheet into a fine wavy shape. 3. A prismatic balance sheet constituting a soft sheet piece attached to sports equipment such as a tennis racket and a golf club, comprising a thin soft metal plate and a pressure-sensitive adhesive formed on the back surface of the metal plate. Layer and a release film that covers the entire surface of the adhesive layer, and a plurality of slits are provided at predetermined intervals on at least one side, and each slit extends from the soft metal plate to the release film. A balance sheet for sports equipment that tears off part of the soft metal plate from the slit along with the release film.