JP2003199857A - Shuttlecock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shuttlecock used for a badminton game, to further detail, one that can prevent drying of feathers and can maintain durability for an extend period, does not lose the good carrying characteristics of a shuttlecock made of natural feathers. <P>SOLUTION: In the shuttlecock 1, feathers 3 (14 to 16 feathers) of a natural water bird or land bird are circularly fastened to the top face of a nearly semispherical base body 2 through an adhesive, the rachises 4 of the all feathers 3 are connected and fixed by darning thread 5 made of cotton yarn or an artificial yarn. The surfaces of all of the feathers 3 forming the shuttlecock 1 are covered by a moisture retention cover 6 formed by coating with fat or a surfactant. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shuttlecock used in badminton competitions, and more particularly, to a shuttlecock for a shuttlecock without affecting flight characteristics. The present invention relates to a shuttlecock with improved performance. 2. Description of the Related Art As shown in FIG. 1, a shuttlecock used in a badminton game has a substantially hemispherical shape made of a cork wrapped in synthetic leather or the like or a foam such as PVC, polyurethane, or polyolefin. Shaped base body 2
On the upper surface of the wings, there are feathers 3 (14 to 16
In general, the book is planted in a ring shape, and the wing shafts 4 of the respective blades 3 are connected by overlocking yarns 5 made of cotton yarn or artificial yarn. In addition to the above, instead of using the wings 3 of natural water birds and land birds as described above,
A shuttlecock formed of a synthetic resin such as a nylon resin to form a skirt portion shaped like a skirt in a manner approximating the aerodynamic characteristics of the above-mentioned natural blade 3, and having the skirt portion implanted on the upper surface of the base body 2. (So-called nylon balls) are also known. By the way, the performance required of a shuttlecock includes stability during flight, particularly the flight distance and the constant flight trajectory. A shuttlecock using the wings 3 is considered the best, and is widely used in general, including in official games. [0004] However, although shuttlecocks using such natural blades have very excellent flight characteristics, they are easily affected by temperature, humidity, etc. because of natural products. However, when the humidity becomes low (dry), the blades are liable to lose moisture and become brittle and easily broken. [0005] Therefore, shuttlecocks using such natural blades are manufactured under strict humidity control. However, especially in a dry season such as winter, the shuttlecock is housed in a shuttlecock case. Even if the wings are stored, there is a problem that the wings become dry and brittle before being used by a competitor, and are easily damaged during the competition. Therefore, in the past, as an emergency measure to prevent the drying of the blades, water was occasionally sprayed on the blades with a sprayer or the like to supply the blades with appropriate moisture.
Since water is deprived over time, the water content of the blades cannot be kept good over a long period of time, and the problem of having to repeatedly perform the above-described water supply operation every time the blades dry is caused. there were. Although it is not intended to prevent the above-mentioned blade from drying, Japanese Patent Application Laid-Open No. 63-21078 discloses a coating film made of a synthetic resin on the entire blade or the shaft of a natural product. A method of strengthening a shuttlecock for improving the impact strength of a blade by forming a blade is disclosed. According to the above proposal, it is expected that drying of the blades can be prevented to some extent by the coating film. However, since the blades are firmly covered and strengthened by the synthetic resin, the bending of the blades is inevitable. It is predicted that the rigidity will increase with the increase in strength, so the original flexibility (softness) of natural blades will be lost, and it will be difficult to obtain the best flight characteristics of shuttlecocks consisting of natural blades Is done. Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and does not impair the best flight characteristics of a shuttlecock composed of natural blades. It is an object of the present invention to provide a shuttlecock capable of maintaining the performance. [0008] In order to achieve the above object, the present invention has the following arrangement. That is, the shuttlecock of the present invention is a shuttlecock configured using natural waterfowl or land bird feathers, wherein the surface of the feathers is provided with a moisturizing film formed by coating with oil or a surfactant. It is characterized by being provided. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view of a shuttlecock, and FIG. 2 is an explanatory view of a blade constituting the shuttlecock. In addition, when the code is the same as the conventional one, the same code is used. As shown in FIGS. 1 and 2, a shuttlecock 1 according to this embodiment is provided on an upper surface of a substantially hemispherical base body 2.
Feathers 3 (14 to 16) of natural water birds, land birds, etc. are planted and fixed in a ring via an adhesive, and the feather shafts 4 of each of the feathers 3 are formed of cotton yarn or artificial yarn. Are connected and fixed. The entire surface of each of the blades 3 constituting the shuttlecock 1 is covered with a moisturizing film 6 formed by coating with a fat or a surfactant. The moisturizing film 6 is formed by, for example, a moisturizing solution formed by diluting a fat or oil material such as beef tallow or vegetable oil or various surfactants such as anionic, cationic or nonionic in water or a solvent. It is obtained by applying a coating process such as coating or spraying on the surface of the blade 3 and then drying it. As shown in FIG. 2, the extremely thin moisturizing film 6 is formed on the entire surface of the blade 3. Have been. Therefore, the blades 3 covered with the moisturizing film 6 are shielded from the outside air and exhibit a sealed state, so that they are hardly affected by the outside air (humidity), and the moisture of the blades 3 evaporates into the outside air. Never dry out. Therefore, even in the dry season, the blades 3 do not dry and become brittle, and the breakage rate of the blades 3 can be reduced, thereby improving the durability of the shuttlecock. Further, since the moisturizing film 6 does not firmly cover and harden the blade 3, it exhibits the original flexibility (softness) of the natural blade 3 without affecting the bending strength and rigidity of the blade 3. And the best flight characteristics of a shuttlecock composed of natural blades can be obtained. EXAMPLE A moisturizing aqueous solution of an anionic surfactant (Sawaclean AO manufactured by Lion Oil & Fat Co., Ltd.) whose concentration was adjusted to 1.5% was prepared, and this was shuttled using an ultrasonic spraying device. Spray was evenly sprayed on the surface of the blade 3 of the cock 1 and allowed to adhere. Then, the shuttlecock 1 is brought to room temperature (temperature 2).
(0 ° C., humidity of about 60%) for a while, and the attached moisturizing aqueous solution was dried to obtain the shuttlecock 1 in which the surface of the blade 3 was covered with the extremely thin moisturizing film 6. First, in order to evaluate the durability of the blades 3 with respect to the humidity change of the outside air, the shuttlecock 1 of this embodiment and the shuttlecock without the moisturizing film 6 (hereinafter referred to as a comparative example) are used. The player was actually hit, and the damage rate of the blade 3 was verified. In this test, 20 hits were applied to 20 shuttlecocks per room in a room maintained at room temperature (temperature of about 20 ° C and humidity of about 60%), temperature of 20 ° C and humidity of 40%. Do, said 20
The damage rate was determined from the number of shuttlecocks in which the blades 3 were broken. Table 1 below shows the results. [Table 1] In addition to the above verification, in order to confirm the moisturizing effect of the blades 3, the shuttlecock blades 3 of this embodiment and the comparative example were brought to room temperature (temperature 20 ° C., humidity 60%) and temperature 2
The samples were placed at 0 ° C. and a humidity of 40%, and the moisture content in each case was measured to compare the degree of change. The results are shown in Table 2 below. In this measurement, the water content was measured at 120 ° C.
The absolute dry mass is defined as the absolute dry mass, and the absolute dry mass and the shuttlecock blades 3 of each of the example and the comparative example are 40% at 20 ° C. From the difference from each mass when left for 4 hours under the condition,
Was determined by calculating the ratio of the water mass to the absolute dry mass of the blade 3. [Table 2] As a result of the verification shown in Table 1 and the measurement shown in Table 2, as described above, in the shuttlecock 1 of the present embodiment, the breakage rate of the blade 3 is small with respect to a change in the humidity of the outside air. It was confirmed that the water content of the sample hardly changed. In particular, in the present example, even when the humidity at which the damage rate of the comparative example is high is 40% or less, a good moisture content is maintained and the damage rate is suppressed to about 1/5 of the comparative example. Was completed. As described above, the shuttlecock of the present invention can be used on the surface of a wing composed of natural waterbirds, land birds, etc.
The blades covered with the moisturizing film are formed by using the wings on which the ultra-thin moisturizing film formed by applying a coating process using an oil or a surfactant is used. , It is hardly affected by the outside air (humidity), and the moisture of the blades does not evaporate into the outside air. Therefore, even in the dry season, the blades do not become dry and brittle, and the breakage rate of the blades can be reduced, thereby improving the durability of the shuttlecock. or,
Since the moisturizing film does not firmly cover and harden the blade, the natural flexibility (softness) of the natural blade can be exhibited without affecting the bending strength and rigidity of the blade. A shuttlecock having excellent flight characteristics can be obtained.

[Brief description of the drawings] FIG. 1 is an explanatory view of the appearance of a shuttlecock. FIG. 2 is an enlarged explanatory view of an area a in FIG. 1; [Explanation of symbols] 1 Shuttlecock 2 Base body 3 feathers 4 feather shaft 5 Thread 6 Moisturizing film

Claims (1)

Claims 1. In a shuttlecock configured using natural waterfowl or land bird feathers, a moisturizing film formed on the surface of the feathers by coating with a fat or a surfactant. A shuttlecock characterized by being provided with.