JP4008525B2 - Golf club shaft - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a golf club shaft , and more particularly to a golf club shaft having a metal decoration layer .
[0002]
[Prior art]
As one of the articles having a metal decoration layer , for example, as disclosed in JP-A-7-31337, a coating film is provided on a material, and an interference film made of metal or the like is provided on the coating film. Tubular bodies are known. The tubular interference film disclosed in this publication is configured so that its film thickness increases and decreases in a wavy manner. By changing the film thickness of the interference film in this way, it interferes with most light in the visible region. To obtain various hues.
[0003]
[Problems to be solved by the invention]
However, if the metal interference film having the above-described configuration is provided, the entire surface has glitter, and thus a problem may occur during use depending on the article. For example, in the case of a golf club shaft, it is easy for bright colored light to enter the eyes and hinders the swing, or it has a metallic luster throughout, so it feels harder than it actually is, and force is applied during the swing There is .
[0004]
The present invention has been made by paying attention to the fact that an article having a metal decoration layer that has been conventionally known is not preferable in appearance depending on the article to be applied because it generally has glitter. . That is, an object of the present invention is to provide a golf club shaft that can obtain a novel appearance with suppressed glitter by reflecting light irregularly at a portion where a metal layer is formed.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the golf club shaft of the present invention comprises a base layer formed on an FRP main body, a roughened region, a smoothed region, and a roughened region. A metal coating layer physically vapor-deposited on the base layer formed with less boundary portions, and a transparent or translucent protective layer formed on the metal coating layer, the base layer is When the average interval of the irregularities in the roughened region is Sm and the average height is Ry, the surface is formed by Ry> Sm and 0.1 μ ≦ Ry ≦ 5 μ, and the top of the convex portion in the irregularities is curved. It is characterized by that. In this way, in the roughened region of the underlayer, light can be irregularly reflected by the portion of the metal coating layer physically vapor deposited thereon, and a pattern with reduced glitter is formed and smoothed. A glitter pattern is formed in the region, and an intermediate color is obtained at the boundary .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The gist of the present invention is that when the metal coating layer is physically vapor-deposited, the underlying layer is roughened. As shown in FIG. 1, when the main body 1 is made of FRP, the underlying layer to be roughened may be a layer 3 made of resin, paint, or the like interposed on the surface of the main body. By forming a layer (undercoat layer) of such a resin, paint, etc., electrolytic corrosion, cracks, etc. are prevented from occurring with the metal coating layer, it is easy to form a rough surface, and the adhesion of the metal coating layer Can be improved.
[0007]
The above-described underlayer is roughened by polishing a desired region with an abrasive such as sandpaper. The degree of roughening can be variously changed depending on the roughness of the abrasive, but in the present invention, as shown in FIG. 2, when the roughness of the roughened surface is S and the height is R, Polishing is performed so that each average value Sm and average height Ry of the roughened region is roughened so that Ry> Sm and Ry ≦ 5 μm.
[0008]
Then, for example, a metal such as aluminum or titanium is formed on the roughened base layer 3 by physical vapor deposition such as vacuum vapor deposition, sputtering, or ion plating. Although the thickness of the metal coating layer 5 that is physically vapor-deposited depends on the degree of unevenness of the underlying layer 3 to be roughened, the unevenness of the underlying layer remains as shown in FIG. Form as much as possible. In such a state, if the metal coating layer 5 is formed thick, it is possible to develop a metallic color that suppresses the glitter, and if it is formed thin, it can be seen through the base layer 3 to be visually observed. Combined with the color of the underlayer 3, various colors or textures with reduced glitter can be expressed.
[0009]
On the metal coating layer 5 configured as described above, a transparent or translucent protective layer 7 is formed so as to protect it. As an aspect of this protective layer 7, for example, a color clear layer mixed with a dye, a fluorescent color clear layer, a matte clear layer, or a clear layer mixed with particles or the like for preventing the adhesion of dirt and bacteria can be used. This can create various features in the article. In addition, the surface of the protective layer 7 is formed smoothly so that the internal metal coating layer can be seen as it is.
[0010]
In the present invention, the average height Ry of the unevenness of the roughened portion is set to 5 μm or less, but the lower limit is preferably about 0.1 μm. This is because when the average height Ry is formed lower than 0.1 μm, the underlying layer tends to be smoothed, and the metal layer portion as in the configuration disclosed in Japanese Patent Laid-Open No. 7-31337 described above. This is because it is not diffusely reflected by the light and the degree of glitter is increased. On the other hand, when the average height Ry of the unevenness is 5 μm or more, the glitter is suppressed, but the degree of unevenness becomes large and the uneven state becomes clear, which is not preferable in appearance.
[0011]
Actually, the base layer is roughened so that the range of Ry is about 0.3 to 3 .mu. And Ry.gtoreq.Sm.times.3, and the metal coating layer 5 is formed thereon with a thickness of about 0.01 to 0.5 .mu.m. When it was formed to a thickness, the glittering property was suppressed, the appearance was astringent, and favorable results were obtained with a calm feeling. Further, as shown in FIG. 2, the top of the convex portion in the concavo-convex is curved, so that light is reflected at this portion and the color is changed, so that a preferable appearance is obtained.
[0012]
Such a portion in which the glitter is suppressed can be obtained by simply roughening the underlayer, and therefore can be formed in an appropriate position according to the use of various articles to which it is applied. That is, according to the configuration shown in FIG. 1, since the ground layer 3 is roughened in the region A, a pattern in which the light is irregularly reflected and the glitter is suppressed is formed, and in the region B, the ground layer 3 is formed. Since the surface is smoothed, the light is reflected in substantially the same direction to form a glitter pattern.
[0013]
【Example】
Hereinafter, an example in which the present invention is applied to a shaft of a golf club will be described with reference to FIG.
FIG. (A) shows a configuration example in which the tip portion 10 of the underlayer formed on the FRP material is roughened, a metal film layer is physically vapor-deposited thereon, and a protective layer is further formed. ing. At the tip end portion of the shaft, light is randomly reflected by the roughened undercoat layer to exhibit a pattern in which the glitter is suppressed. Further, from the middle to the grip direction, the underlying layer is smoothed without being roughened, and thus exhibits a glittering pattern. It should be noted that the boundary portion is reduced in degree of roughening so that an intermediate color can be obtained. Thus, by making the tip portion of the shaft have a pattern in which the glitter is suppressed, light reflection does not bother at the time of swing.
[0014]
FIG. 2B shows a configuration example in which the base layer of the portion that becomes the kick point of the shaft is roughened so that the kick point 12 can be easily seen. As shown in these (a) and (b), by roughening the underlying layer at a meaningful position as a shaft and physically depositing a metal film, the function is improved from the appearance side or the function is emphasized. be able to.
[0015]
FIG. 3C shows a configuration example in which the shaft is interspersed with patterns with reduced glitter. This is obtained by forming a base layer, applying a mask having an opening in which a desired pattern is formed, polishing in that state, removing the mask, and physically depositing a metal film. In this way, it is possible to make a pattern in which only desired portions have reduced glitter, and a shaft having an excellent appearance can be manufactured. Of course, not only a simple pattern but also a character, a picture, and the like can be created using a mask.
[0017]
【The invention's effect】
According to the present invention, the roughened region, the smoothed region, and the boundary portion of the base layer of the FRP fat main body on which the metal coating is physically vapor-deposited are formed , so that the brightness is increased in the roughened region. A pattern with reduced properties is formed, a glitter pattern is formed in the smoothed area, and a neutral color is obtained at the boundary. The roughened area and the boundary are used for the smoothed area. Depending on the situation etc., it is possible to form a pattern with a novel metal decoration layer that suppresses the glitter, and moreover, the light is reflected by the curved protrusions in the unevenness of the underlayer, resulting in a change in color. A golf club shaft having a preferred appearance is obtained.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an article illustrating the configuration of the present invention.
FIG. 2 is an enlarged view of a roughened portion of a base layer in FIG.
FIG. 3 is a diagram showing an embodiment in which the structure shown in FIG. 1 is applied to a golf club shaft, including (a) to (c).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Article body 3 Base layer 5 Metal film layer 7 Protective layer

Claims (2)

A physical layer is formed on the base layer formed on the FRP main body, and a roughened region, a smoothed region, and a boundary portion that is less roughened than the roughened region. A vapor-deposited metal coating layer, and a transparent or semi-transparent protective layer formed on the metal coating layer, wherein the underlayer has an average interval of irregularities of the roughened region as Sm, average A golf club shaft characterized in that, when the height is Ry, Ry> Sm and 0.1 μ ≦ Ry ≦ 5 μ, and the top of the convex portion in the irregularities is curved. The golf club shaft according to claim 1, wherein the base layer is a resin or paint layer interposed on the surface of the main body.

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