JP2006192263A - Golf club, and golf club shaft - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf club shaft for easily grasping adaptation to each golfer. <P>SOLUTION: A golf club includes: the golf club shaft; a grip for covering one end of the golf club shaft; and a golf club head to be mounted at the other end of the golf club shaft. The ratio V<SB>h</SB>/V<SB>g</SB>of the head speed V<SB>h</SB>to a grip speed V<SB>g</SB>or the grip speed V<SB>g</SB>in the golf club immediately before an impact is displayed in the golf club shaft, which is an index for the golf swing of the golfer to be adapted to the golf club shaft. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a golf club and a golf club shaft. More specifically, the ratio V _h / V _g between the head speed V _h and the grip speed V _g of the golf club immediately before impact or the grip speed V _g is displayed. The present invention relates to a golf club shaft and a golf club having the golf club shaft.

Conventionally, various golf clubs have been manufactured in consideration of static characteristics such as the golf club shaft length, club weight, shaft hardness, etc., in order to increase the golf ball flight direction and increase the flight distance. It has been.
When a golfer selects a golf club having the optimum flex for himself, the golfer determines the optimum flex for the golf club shaft based only on the head speed of the golf club just before impact.
Each shaft manufacturer has also proposed various golf club shaft selection criteria, but all are based on head speed, and no other indicators were used.

In recent years, as needs from users regarding the selection of golf club shafts become more detailed, it is considered insufficient to select the optimum golf club shaft for the user by a selection method based only on the head speed. Various selection methods have been proposed (see, for example, Patent Document 1).
Patent Document 1 selects a golf club shaft based on the knowledge that the factors that determine the optimum shaft flex for each golfer are the swing speed, the amount of distortion of the golf club shaft at the top, the swing time, and the acceleration. A shaft selection device has been proposed.
International Publication No. 96/11726 Pamphlet

However, in Patent Document 1 and the like, there is no mention of a method for displaying the golf club shaft in an easy-to-understand manner to the user.
In addition, the kick point, which is an index for selecting the shaft flex, uses an ambiguous expression of the scale, such as the first tone and the original tone, which is extremely difficult for the user to understand.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a golf club shaft that can easily grasp what is appropriate for each golfer, and a golf club having the golf club shaft. .

In order to solve the above problems, a first aspect of the present invention includes a golf club shaft, a grip that covers one end of the golf club shaft, and a golf club head that is attached to the other end of the golf club shaft. The golf club shaft has a ratio V _h / V _g between the head speed V _h of the golf club immediately before the impact and the grip speed V _g , which is an index of a golf swing of a golfer adapted to the golf club shaft. A golf club characterized by being displayed on is provided.

A second aspect of the present invention is a golf club having a golf club shaft, a grip covering one end of the golf club shaft, and a golf club head attached to the other end of the golf club shaft. The golf club shafts are color-coded according to the ratio V _h / V _g between the head speed V _h of the golf club immediately before the impact and the grip speed V _g , which is an index of golf swing of a golfer adapted to the club shaft. The golf club characterized by the above is provided.

According to a third aspect of the present invention, there is provided a golf club having a golf club shaft, a grip covering one end of the golf club shaft, and a golf club head attached to the other end of the golf club shaft. A plurality of levels are set according to the value of the ratio V _h / V _g between the golf club head speed V _h just before the impact and the grip speed V _g , which is an index of the golf swing of the golfer that fits the club shaft, Characters, numerical values, or colors are assigned according to the set level, and the characters or numerical values corresponding to the value of the ratio V _h / V _g are displayed on the golf club shaft, or the ratio V to provide a golf club, characterized in _{that h /} V _g golf club shaft in a color corresponding to the value of is color coded Than it is.

According to a fourth aspect of the present invention, there is provided a golf club having a golf club shaft, a grip covering one end of the golf club shaft, and a golf club head attached to the other end of the golf club shaft. Provided is a golf club characterized in that the golf club head speed V _h and the grip speed V _g of the golf club immediately before the impact, which are indicators of the golf swing of the golfer adapted to the club shaft, are displayed on the golf club shaft. It is.

The fifth aspect of the present invention is a golf club having a golf club shaft, a grip covering one end of the golf club shaft, and a golf club head mounted on the other end of the golf club shaft. A plurality of levels are set according to the value of the head speed V _h of the golf club immediately before impact, and characters, numerical values, or colors are assigned according to the set level, and the value of the head speed V _h is The corresponding character or numerical value is displayed on the golf club shaft, or the golf club shaft is color-coded with a color corresponding to the value of the head speed V _h , and the grip speed V _g is displayed on the golf club shaft. A golf club characterized by the above is provided.

In the present invention, the grip speed V _g is set to a plurality of levels according to the value, and characters, numerical values, or colors are assigned according to the set level. The value of the grip speed V _g it is preferable that the one character or number is displayed on the golf club shaft, or said golf club shaft in a color corresponding to the value of the grip speed V _g is color-coded according to.

A sixth aspect of the present invention is a golf club having a golf club shaft, a grip covering one end of the golf club shaft, and a golf club head mounted on the other end of the golf club shaft. A plurality of levels are set according to the value of the head speed V _h of the golf club immediately before impact, and characters, numerical values, or colors are assigned according to the set level, and the value of the head speed V _h is the character or numeric response is either displayed on the golf club shaft, or golf club shaft is color-coded according to the value of the head speed V _h, further said head speed V _h, the grip speed V _g provide a golf club, characterized in that the ratio V _{h /} V _g is displayed in the golf club shaft In the Rukoto.

In the present invention, the ratio V _h / V _g is set to a plurality of levels according to the value, and according to the set level, characters, numerical values or colors are assigned, and the ratio V _h / the character or numeric corresponding to the value of V _g is either displayed on the golf club shaft, or the ratio V _{h /} V _{to g} golf club shaft in a color corresponding to the value of is color-coded is preferred.

The seventh aspect of the present invention is a ratio V _h / V _g between a golf club head speed V _h just before impact and a grip speed V _g , which is an index of a golf swing of a golfer adapted to the golf club shaft. The golf club shaft is characterized in that is displayed.

According to an eighth aspect of the present invention, the ratio V _h / V _g between the golf club head speed V _h and the grip speed V _g immediately before the impact, which is an index of golf swing of a golfer who fits the golf club shaft. The present invention provides a golf club shaft characterized by being color-coded.

The ninth aspect of the present invention is the value of the ratio V _h / V _g between the head speed V _h of the golf club immediately before impact and the grip speed V _g , which is an index of the golf swing of the golfer that fits the golf club shaft. A plurality of levels are set according to the character, a character, a numerical value, or a color is assigned according to the set level, and the character or the numerical value according to the value of the ratio V _h / V _g is displayed. Or a golf club shaft characterized by being color-coded with a color corresponding to the value of the ratio V _h / V _g .

The tenth aspect of the present invention is characterized in that the head speed V _h of the golf club immediately before impact and the grip speed V _g which are indices of a golf swing of a golfer who fits the golf club shaft are displayed. A golf club shaft is provided.

In an eleventh aspect of the present invention, a plurality of levels are set according to the value of the head speed V _h of the golf club immediately before the impact, and letters, numerical values, or colors are assigned according to the set level. The character or numerical value corresponding to the value of the head speed V _h is displayed, or the color or the color according to the value of the head speed V _h is displayed, and the grip speed V _g is further displayed. A golf club shaft is provided.

In the present invention, the grip speed V _g is set to a plurality of levels according to the value, and characters, numerical values, or colors are assigned according to the set level. The value of the grip speed V _g it is preferable that the character or numerical values is color-coded in accordance with the value of either displayed or the grip speed V _g corresponding to.

In the twelfth aspect of the present invention, a plurality of levels are set according to the value of the head speed V _h of the golf club immediately before the impact, and characters, numerical values, or colors are assigned according to the set level. wherein either the character or numeric corresponding to the value of the head speed V _h is displayed, or the color-coded with a color corresponding to the value of the head speed V _h, further said head speed V _h, the grip speed V _g The golf club shaft is characterized in that the ratio V _h / V _g is displayed.

In the present invention, the ratio V _h / V _g is set to a plurality of levels according to the value, and according to the set level, characters, numerical values or colors are assigned, and the ratio V _h / V or _g the letters or numerical values corresponding to the value of is displayed, or may preferably be color-coded according to the value of the ratio V _{h /} V _g.

According to the golf club of the first aspect or the second aspect of the present invention, the ratio V _h / V _g between the head speed V _h of the golf club immediately before impact and the grip speed V _g is displayed on the golf club shaft. Or by color-coding the golf club shaft, each golfer can easily select one with a golf club shaft suitable for each person and provide a golf club having a golf club shaft adapted to each golfer can do.

According to the golf club of the third aspect of the present invention, a plurality of levels are set according to the value of the ratio V _h / V _g between the head speed V _h of the golf club immediately before impact and the grip speed V _g , Depending on the level, letters, numerical values or colors are assigned and letters or numerical values corresponding to the value of the ratio V _h / V _g are displayed on the golf club shaft, or colors corresponding to the value of the ratio V _h / V _g By color-coding the golf club shaft, it is easy for each golfer to select a golf club shaft suitable for each person, and a golf club having a golf club shaft suitable for each golfer is provided. it can.

According to the golf club of the fourth aspect of the present invention, the golf club shaft is displayed with the head speed V _h and the grip speed V _g of the golf club immediately before the impact, so that each golfer is suitable for each person. Therefore, it is easy to select a golf club having a golf club shaft, and a golf club having a golf club shaft suitable for each golf player can be provided.

According to the golf club of the fifth aspect of the present invention, a plurality of levels are set according to the value of the head speed V _h of the golf club immediately before the impact, and characters, numerical values, or colors are set according to the set level. The letter or numerical value corresponding to the value of the head speed V _h is assigned and displayed on the golf club shaft, or the golf club shaft is color-coded according to the color corresponding to the value of the head speed V _h , and the grip speed V _g By displaying this on the golf club shaft, each golfer can easily select a golf club shaft suitable for each person, and a golf club having a golf club shaft suitable for each golfer can be provided. it can.

According to the golf club of the sixth aspect of the present invention, a plurality of levels are set according to the value of the head speed V _h of the golf club immediately before the impact, and characters, numerical values, or colors are set according to the set level. It is assigned color-coded golf club shaft in either the character or numeric corresponding to the value of the head speed V _h displayed on the golf club shaft, or corresponding to the value of the head speed V _h color, further head speed V _h And the ratio V _h / V _g to the grip speed V _g are displayed on the golf club shaft, so that each golfer can easily select one having a golf club shaft suitable for each person. A golf club having a matched golf club shaft can be provided.

According to the golf club shaft of the seventh aspect or the eighth aspect of the present invention, the ratio V _h / V _g between the head speed V _h of the golf club immediately before the impact and the grip speed V _g is displayed, or By color-coding, it is possible to easily grasp what suits each golfer based on an index other than the head speed.

According to the golf club shaft of the ninth aspect of the present invention, a plurality of levels are set according to the ratio V _h / V _g between the golf club head speed V _h and the grip speed V _g immediately before impact. In accordance with the level, letters, numerical values or colors are assigned to display the characters or numerical values corresponding to the ratio V _h / V _g value, or color-coded according to the color corresponding to the ratio V _h / V _g value. Thus, it is possible to easily grasp what suits each golfer based on an index other than the head speed.

According to the golf club shaft of the tenth aspect of the present invention, the golf club head speed V _h and the grip speed V _g of the golf club immediately before the impact are displayed. It is possible to easily grasp what is compatible.

According to the golf club shaft of the eleventh aspect of the present invention, a plurality of levels are set according to the value of the head speed V _h of the golf club immediately before the impact, and characters, numerical values or colors are set according to the set level. Is displayed, characters or numerical values corresponding to the value of the head speed V _h are displayed, or color coding is performed according to a color corresponding to the value of the head speed V _h , and further the grip speed V _g is displayed. It is possible to easily grasp what is appropriate for each golfer based on an index other than.

According to the golf club shaft of the twelfth aspect of the present invention, a plurality of levels are set according to the value of the head speed V _h of the golf club immediately before the impact, and characters, numerical values or colors are set according to the set level. and assigned, colored by either displaying a character or numeric corresponding to the value of the head speed V _h, or corresponding to the value of the head speed V _h color, and further head speed V _h, the grip speed V _g By displaying the ratio V _h / V _g , it is possible to easily grasp what suits each golfer based on an index other than the head speed.

A golf club shaft and a golf club according to the present invention will be described in detail based on an embodiment shown in the accompanying drawings.
FIG. 1 is a schematic view showing a golf club according to a first embodiment of the present invention.

  As shown in FIG. 1, the golf club 10 of this embodiment includes a golf club shaft 12, a grip 14 that covers one end of the golf club shaft 12, and a golf club head 16 that is attached to the other end of the golf club shaft 12. The golf club head 16 is joined to a hosel portion 18b projecting upward on the heel side via a socket.

The golf club head 16 has a face portion 18a having a hitting surface for hitting a golf ball, and a hosel portion 18b to which the golf club shaft 12 is inserted and joined.
The golf club head 16 is not particularly limited, and includes a hollow golf club head made of a hollow structure, a so-called head such as a wood such as a driver, and a head generally called an iron.

  The grip 14 is a portion that is held by a golfer, and is formed of rubber, leather, or the like. The end of the grip 14 on the other end side of the golf club shaft 12 is a grip end 15. Here, the speed of the grip end 15 immediately before hitting the golf ball is referred to as a grip speed.

  The golf club shaft 12 is, for example, a hollow cylindrical body over its entire length, and is formed of a lightweight fiber-reinforced resin material. As this fiber reinforced resin material, for example, carbon fiber reinforced plastic (CFRP) or glass fiber reinforced plastic (GFRP) is used.

The golf club shaft 12 has a display portion 20 with a display including a ratio V _h / V _g between the head speed of the golf club head 16 immediately before impact and the grip speed of the grip end 15 or the grip speed V _{g on the surface} thereof. Is provided. This ratio V _h / V _g is an index for selecting a golf club shaft suitable for each golfer, and has been found by the present inventor. Note that a golf club shaft adapted to each golfer about to be selected according to the ratio V _{h /} V _g will be described later in detail.
The golf club shaft according to the present invention has a display unit 20 for displaying an index for selecting a golf club shaft suitable for each golfer. Thereby, each golfer can grasp | ascertain the golf club shaft which suits himself / herself easily by selecting a golf club shaft based on the parameter | index described on a display part.

FIGS. 2A to 2C are schematic views illustrating an example of a display unit that displays an index for selecting a golf club shaft in the golf club of the present embodiment.
In addition to the ratio V _h / V _g , the display unit 20 of the golf club shaft 12 includes various information such as a display representing a shaft manufacturer, a display representing a series of golf club shafts, and an index for selecting a golf club shaft. .
The display part 20 is comprised by the label affixed on the surface of the golf club shaft 12, for example.
The display unit 20 includes a first display area 22 on which a shaft manufacturer, a series of golf club shafts, a product name of the golf club shaft, and the like, and a second display area 24 on which a shaft speed _Vg is displayed. And a third display area 26 in which the value of the ratio V _h / V _g is displayed.

As shown in FIGS. 2A to 2C, “M-43” displayed in the second display area 24 is an index for selecting a golf club shaft, and is a golf club head speed V _h. Represents. In other words, this golf club shaft can sufficiently perform its function when used by a golfer having a head speed of around 43 m / s (46 to 43 m / s).
The head speed is an index for selecting a golf club shaft that has been conventionally used as a standard, and generally, a golf club shaft that is hard and has little bending is suitable for a golfer with a fast head speed. A golf club shaft which is soft and has a certain degree is suitable for a golfer having a low head speed.

Numerical values “008”, “012”, and “016” shown in the third display area 26 shown in FIGS. 2A to 2C are golf balls immediately before impact, which are indices for selecting a golf club shaft. This represents the value of the ratio V _h / V _g between the club head speed V _h and the grip speed V _g .

In the present invention, it is preferable that the head speed V _h and the grip speed V _g of the golf club determine the speed of the golf club head immediately before impact. However, the head speed and grip speed of the golf club head in the section before and after the impact point can be substituted as those immediately before the impact.
The head speed V _h indicates the speed of the end of the golf club head, but a speed at a position separated by 700 mm or more from the grip end may be used as the head speed V _h . In this case, the upper limit of the position from the grip end is the end of the golf club head.
Furthermore, the grip speed V _g indicates the speed of the grip end, but a speed at a point within a range of 300 mm from the grip end may be substituted for the grip speed V _g . In the present invention, it is preferable to substitute the velocity at a point in the range of 200mm from the grip end portion as a grip speed V _g.
Further, the head speed V _h and the grip speed V _g of the golf club can be calculated from the time required for the golf club to pass between the two points. In this case, the distance between the two points is 20 to 200 mm. preferable.

Further, the head speed V _h and the grip speed V _g are not particularly limited as to the measuring method, and may be directly measured.
In addition to the direct measurement, the head speed V _h and the grip speed V _g are obtained by measuring the moving speed of two measurement positions between the grip position and the head position on the golf club shaft of the golf club, It can also be calculated based on the moving speed at each measurement position.
In this case, the distance between the two measurement positions on the golf club shaft is α, the distance from one of the two measurement positions on the grip position side to the grip position is β, and the distance between the grip position and the golf club head position is The interval is H, the moving speed of one measurement position in the impact state is V _a , and the moving speed of the other measurement position is V _b . At this time, the grip speed V _g immediately before the impact is calculated using the following formula (1). Further, the head speed V _h immediately before the impact is calculated using the following formula (2).
V _g = {(α + β) × V _a −β × V _b } / α (1)
V _h = {(α + β−H) × V _a + (H−β) × V _b } / α (2)

In the present embodiment, the same head speed V _h, grip speed V _g is illustrated three different golf club shaft (see FIG. 2 (a) ~ (c) ). In this embodiment, the grip speed _Vg is classified into three stages from the slowest one.
The golfer selects a golf club shaft suitable for himself based on the ratio V _h / V _g which is a new index found by the present inventor in addition to the conventional golf club head speed V _h. can do.

As shown in FIGS. 2A to 2C, in this embodiment, three types of golf club shafts having different values of the ratio V _h / V _g are shown, and the golf club shafts are classified into three stages. However, golf club shafts with different ratio V _h / V _g values may be provided.
By doing so, the person who provides the golf club shaft can provide the golf club shaft classified according to the detailed needs from the user.

Further, even if the golfer is the same person, the head speed may be different when golf swinging golf clubs having different weights or lengths.
In the golf club shaft of the present embodiment, since the ratio V _h / V _g is displayed together with the head speed V _g of the golf club, the golf club is selected based on the ratio V _h / V _g in addition to the head speed. Thus, the golf club shaft can be selected more objectively.

In FIGS. 2A to 2C, the ratio V _h / V _g between the head speed V _h and the grip speed V _g is displayed as a numerical value on the display unit 20 that displays an index for selecting a golf club shaft. However, the display form of the ratio V _h / V _{g on} the display unit 20 is not limited to this. A color is set for the ratio V _h / V _g according to the value, and the ratio V V is based on the set color. it may be displayed in different colors _h / _{V g.}
For example, as shown in Table 1 below, the ratio V _h / V _g value near 16 is set to “blue”, and the ratio V _h / V _g value near 8 is “red”. The ratio V _h / V _{g having} a value near 12 is set to “white”.
Based on these color settings, the golf club shaft display unit 20 suitable for golfers having a ratio V _h / V _g value of 16 is displayed in blue, and the ratio V _h / V _g value is about 8. The display unit 20 of the golf club shaft suitable for the golfer is displayed in red. The display unit 20 of the golf club shaft suitable for a golfer having a value of the ratio V _h / V _{g in} the vicinity of 12 may be displayed in white.
In the present invention, the display unit 20 is not limited to being color-coded, and the main body of the golf club shaft 12 other than the display unit 20 may be color-coded.

Further, the golf club shaft display unit 20 suitable for a golfer having an intermediate value of the respective ratios V _h / V _g shown in FIGS. 2A to 2C may be displayed in an intermediate color. That is, when the value of the ratio V _h / V _g is between 16 (blue) and the value of the ratio V _h / V _g is 12 (white), and the value of the ratio V _h / V _g is 14, it is thin. It can also be displayed in blue.
Incidentally, in the case of setting the color according to the value of the ratio V _{h /} V _g has a value of the ratio V _{h /} V _g, the relationship between the selected color, and fold the table, this table external recording It is preferable to express in the form of a medium.

Here, the external display medium in the present invention refers to golf club manuals, catalogs, posters, panels, etc. that are issued or created by golf club manufacturers or sales companies, TV commercials, sales promotion Display by video, telecommunications line, etc. can be considered. That is, reference information that is recognizable mainly visually and that describes the information of the value of the ratio V _h / V _g in the present invention and that clearly indicates the golf club that displays the information of the value of the ratio V _h / V _g . It is one of the display means. The external display medium needs to display reference information unless the value of the ratio V _h / V _g in the present invention is generally known. If it is generally known, the unit is omitted, and the numerical value is omitted by grading the numerical value. Display of equal reference information is conceivable and both are included in the present invention.

  Moreover, although the display part 20 is comprised by sticking a label on the surface of the golf club shaft 12, this invention is not limited to this, The tag by which the display content of the display part 20 was recorded Can also be used. The golf club shaft 12 provided with this tag may be sold. The display unit 20 may be formed by printing directly on the golf club shaft using a paint or the like.

Hereinafter, it will be described with reference to FIGS. 3 and 4 that a golf club shaft suitable for each golfer can be selected according to the ratio V _h / V _g .

FIG. 3 is a schematic diagram illustrating an example of a display screen of the display device in the golf swing analysis system.
Display screen 40 is a graph section 42, the drawing unit 44 to display dynamic golf club behavior during the downswing of displaying speed history of head speed V _g and grip speed V _h of the golf club during the downswing simultaneously, During a dynamic golf swing displayed on the characteristic display unit 46 that displays the swing characteristic value including the head speed V _h , the grip speed V _g, and the ratio V _h / V _g immediately before the impact, and the graph unit 42 and the drawing unit 44. Various menu buttons 48 are provided for allowing the user to select the section and for selecting the start or end of drawing in the drawing unit 44.

The graph unit 42 displays the relationship between the head speed _Vh and time and the relationship between the grip speed _Vg and time simultaneously as a graph.
In the graph 42, curve 43a is, in the golf club head, which is a curve showing the speed history of head speed V _h from the top to the impact. In addition, the curve 43b is, in the vicinity of the end of the grip portion of the golf club, which is a curve showing the speed history of the grip speed V _g from the top to the impact.

The speed history at a predetermined position of the golf club includes, for example, a transmitter that forms a predetermined magnetic field, a receiver that generates an output voltage in three axial directions according to the strength and direction of the magnetic field, and a controller. This can be measured by using a three-dimensional position / direction measuring device.
More specifically, using the transmitter position as a reference position, the receiver three-dimensional position (x _m , y _m , z _m ) on the X, Y, Z coordinates having mutually orthogonal coordinate axes, and Euler angles are used. By measuring the receiver orientation (θ _y , θ _p , θ _r ) on the X, Y, Z coordinates expressed as above, and acquiring time series data, the speed history at a predetermined position of the golf club is calculated. The
An example of such a three-dimensional position / direction measuring device is 3SPACE FASTRAK (Polhemus).

In the drawing unit 44, the locus 45 that dynamically displays the behavior of the golf club displays the golf club from the top to the impact using a simulated line drawing, and the locus of the golf club as time passes. By displaying 45, the locus of the golf club as if the user is holding the golf club represented by the line drawing and performing a golf swing is displayed.
The trajectory 45 displayed on the drawing unit 44 is a behavior when viewed from the side with respect to the flying ball direction when hitting a golf ball, that is, the side surface is set as a projection plane with respect to the golfer who is swinging. The behavior of a golf club is shown.
Drawing of the behavior of a golf club during such a golf swing projects a three-dimensional position (x _m , y _m , z _m ) on the projection plane, and a time series of Euler angles (θ _y , θ _p , θ _r ). It can be created by using the direction of the golf club shaft with the passage of time calculated from the data (for details, refer to Japanese Patent Application Laid-Open No. 2001-112903).

The swing characteristic value displayed on the characteristic display unit 46 is a value of the swing characteristic representing the characteristic of each golfer in the golf swing. In this embodiment, the head speed V _h immediately before the impact, the grip speed V _g, and the ratio Let V _h / V _g be a swing characteristic.
The head speed V _h and the grip speed V _g are speeds immediately before impact, and are speeds when the golf club is positioned at the lowest point in the locus 45 represented by dynamic drawing. It is the speed when the most time has elapsed from the start. The head speed V _h and the grip speed V _g can be measured using the three-dimensional position / direction measuring device.
The ratio V _h / V _g is a ratio between the head speed V _h and the grip speed V _g immediately before the impact, and is a value obtained by dividing the head speed V _h by the grip speed V _g .

As shown by the curve 43a of the graph part 42, the head speed continues to increase from the top to the impact, whereas as shown by the curve 43b, the grip speed gradually increases from the top and eventually decreases toward the maximum value. I understand that
These speed histories show unique values for each golfer. That is, the head speed V _h is a golfer to each other are the same, there is a case where the grip speed V _g indicates a different value. Further, even if the golfer is the same person, the head speed may be different when golf swinging golf clubs having different weights or lengths.
Therefore, the conventional golf club shaft selection method considering only the golf club head speed is insufficient as a method for selecting a golf club shaft suitable for each golfer.

However, when the same golfer performs a golf swing, even if the head speed is different, the ratio V _h / V _g between the head speed V _h and the grip speed V _g immediately before the impact is unique to each golfer. The inventors of the present application know that it shows a value.
Therefore, the inventor of the present application has found that not only the head speed but also the grip speed in the golf swing is an index that characterizes the golf swing of the golfer.
Further, the inventors of the present application have found that not only the head speed but also the grip end speed is an important index characterizing a golfer's golf swing in the golf swing (Japanese Patent Application No. 2004-305642). ).

Based on the above knowledge, the present inventor confirmed that a golf club shaft suitable for each golfer can be selected based on the ratio V _h / V _g as will be described in detail below.

A golfer with a different head speed when swinging a golf club is asked to swing a reference golf club, and the head speed V _h and grip speed V _g immediately before the impact of the golfer are measured. the relationship of V _h and the grip speed V _g was plotted as shown in Figure 4.
In addition, ask golfers to swing golf club shafts with different types of tone, select the most preferable tone, and according to the type of tone (first tone, medium tone, original tone) selected by the golfer feeling The plot points were divided.
FIG. 4 is a graph showing the relationship between the head speed and grip speed immediately before impact and the appropriate kick point. The appropriate kick point is the tone of the golf club shaft selected by the golfer by feeling.

From FIG. 4, the head speed of the golfer who selected the original tone is in the range from 39 m / s to 52 m / s, and the head speed of the golfer who selected the medium tone is 40 m. / S to 49 m / s. Looking at the head speed of the golfer who selected the first tone, the head speed is in the range from 40 m / s to 52 m / s.
Thus, it can be seen that there is no direct relationship between the appropriate kick point and head speed of each golfer.

However, the grip speed V _g golfer of more than 5m / s has selected a golf club shaft of the original tone or medium tone, grip speed V _g is 4m / s or less of the golfer the previous tone or medium tone of the golf club shaft It can be seen that is selected. In addition, the golfer was selected golf club shaft of each tone, it is seen that there is a grip speed V _g also becomes faster trend as the head speed V _h becomes faster.
Therefore, when golfers that select the type of tone are classified according to the ratio V _h / V _g between the head speed V _h and the grip speed V _g immediately before the impact, as shown in FIG. The average of the ratio V _h / V _g is 8.0, the golfer who selected the medium tone has the average ratio V _h / V _g of 10.3, and the golfer who selected the previous tone has the ratio V The average of _{h 1} / V _g was 12.0.

Thus, the golfer who selected the original golf club shaft has a smaller ratio V _h / V _g compared to the golfer who selected the first or middle golf club shaft, It can be seen that the selected golfer has a large ratio V _h / V _g .
Accordingly, a golf club shaft suitable for each golfer can be selected based on the ratio V _h / V _g .

From the above, in the golf club of the present embodiment, the display unit 20 provided on the surface of the golf club shaft 12, on the display unit 20, together with the head speed, the ratio V _h of head speed V _h and the grip speed V _g / V _g is displayed, so that in addition to the conventional golf club head speed V _h , the golfer can use the ratio V _h / V _g as a new index found by the present inventor. As a reference, a golf club having a golf club shaft suitable for the user can be selected. Thereby, it is possible to easily grasp a golf club having a golf club shaft suitable for itself.
In addition, in the golf club shaft of the present embodiment, the golf player can display the ratio of the head speed V _h to the grip speed V _g V _h / V _g on the surface thereof. In addition to the head speed V _h , a single golf club shaft suitable for the user can be selected based on the ratio V _h / V _g which is a new index found by the present inventor. As a result, it is possible to easily grasp the golf club shaft suitable for the user.

In the present invention, the display form on the display unit 20 of the golf club shaft is not limited to that shown in FIGS. A plurality of levels are set according to the value of the ratio V _h / V _g between the head speed V _h of the golf club immediately before impact and the grip speed V _g, and characters, numerical values or colors are set according to the set level. May be assigned. In this case, characters or numerical values corresponding to the value of the ratio V _h / V _g are displayed on the display unit 20 of the golf club shaft 12, or the golf club shaft 12 is displayed in a color corresponding to the value of the ratio V _h / V _g . Color coding or color coding of the display unit 20 may be performed.

Therefore, for example, depending on the value of the ratio V _h / V _g , three levels are set as shown in Table 2 below, and “LOW”, “MID”, Assign the letters “HIGH”. The ratio V _h / V _g may be displayed by the assigned characters (“LOW”, “MID”, “HIGH”). Preferably, the level is set in two stages.
In this case, as in the modification of the present embodiment shown in FIGS. 5A to 5C, the level display for displaying “LOW”, “MID”, and “HIGH” indicating the level set on the display unit 20a. Region 28 is provided.

This modification can obtain the same effect as that of the first embodiment, and the golfer can set the level (“LOW”, “ _H ”) according to the value of the ratio V _h / V _g in addition to the head speed V _h . Based on “MID” and “HIGH”), it is possible to select a golf club having a golf club shaft suitable for the golf club. In addition, a golf club shaft suitable for oneself can be selected as a single golf club shaft.
Also in this modification, three levels set according to the value of the ratio V _h / V _g shown in Table 2 above, and “LOW”, “MID”, and “HIGH” set for each level. These characters are preferably recorded on an external display medium.

Next, a second embodiment of the present invention will be described.
FIGS. 6A to 6C are schematic views showing a display part of a golf club shaft of a golf club according to a second embodiment of the present invention.
In addition, the same code | symbol is attached | subjected to the same structure as the display part 20 of the golf club shaft 12 of the golf club 10 of 1st Embodiment shown to Fig.2 (a)-(c), and the detailed description is abbreviate | omitted. To do. In addition, in FIGS. 6A to 6C, illustration of the golf club and the golf club shaft is omitted.

In the present embodiment, the display portion 20b of the golf club shaft (not shown) has a ratio V _h / V as compared with the display portion 20 (see FIGS. 2A to 2C) of the first embodiment. instead of the third display area 26 indicating the value of _g, except that the gripping speed display area 30 for displaying a value indicating a range of the grip speed V _g is provided, other configurations are first It is the structure similar to the display part 20 of the golf club shaft of embodiment. For this reason, the detailed description about the golf club of 2nd Embodiment and a golf club shaft is abbreviate | omitted.

In the present embodiment, the display unit 20b is not intended to display the value of the ratio _V h / _{V g,} instead of the value of the ratio _V h / _{V g,} is for displaying the value of the grip speed _{V g.} Instead of the ratio V _h / V _g , the value of the grip speed V _g is used as an index.
The value of the grip speed V _g, as shown in Table 3, in each head speed range are set, respectively. The value of the grip speed V _g at the head speed range is the measurement result so many golfers was obtained statistically values. In this embodiment, each head speed range is classified into three levels. Two levels are preferred.
Also in this embodiment, the grip speed V _g which is set according to each head speed ranges shown in Table 3, which is preferably recorded in the external display medium.
In addition, “−” shown in Table 3 below indicates “below” when it is on the front side of the numerical value, and indicates “exceeds” when it is on the rear side of the numerical value.

In the present embodiment, the grip speed _Vg is displayed in the grip speed display area 30 of the display unit 20b based on the classification shown in Table 3 above. “−3.6” in the grip speed display area 30 in FIG. 6A indicates that the grip speed V _g is 3.6 m / s or less. Further, “3.6-4.8” in the grip speed display area 30 in FIG. 6B indicates that the grip speed V _g is in the range of 3.6 to 4.8 m / s. Furthermore, “4.8−” in the grip speed display area 30 in FIG. 6C indicates that the grip speed V _g exceeds 4.8 m / s.

Also in this embodiment, the same effect as in the first embodiment can be obtained. By displaying the grip speed V _g together with the head speed V _h on the display portion 20b of the golf club shaft, the golfer can Based on the grip speed V _g in addition to the speed V _h , a golf club having a golf club shaft suitable for the golf club can be selected. In addition, a golf club shaft suitable for oneself can be selected as a single golf club shaft.

In the present embodiment, the display unit, a configuration which together with the head speed V _h to display the value of the grip speed V _g, the present invention is not limited thereto, for example, grip speed V _g instead of value, it may be displayed representative value of the grip speed V _g which is set according to each head speed range.
In this case, in advance, as shown in Table 4, it sets the representative value of the grip speed V _g which is set according to each head speed range. Also in this embodiment, the representative value of the grip speed V _g and grip speed V _g which is set according to each head speed range shown in the following Table 4, which is preferably recorded in the external display medium.
In addition, “−” shown in Table 4 below indicates “below” when it is on the front side of the numerical value, and indicates “exceeds” when it is on the rear side of the numerical value.

Here, FIGS. 7A to 7C are schematic views illustrating modifications of the display portion of the golf club shaft of the golf club according to the second embodiment of the present invention.
In addition, the same code | symbol is attached | subjected to the same structure as the display part 20a of the golf club shaft of 2nd Embodiment shown to Fig.6 (a)-(c), and the detailed description is abbreviate | omitted. In FIGS. 7A to 7C, the golf club and the golf club shaft are not shown.

In this variation, the configuration of the display portion 20c is, in place of the grip speed display area 30 of the display portion 20b of the second embodiment, the representative value display area 32 for displaying a representative value of the grip speed V _g is provided The other structure is the same as that of the display part 20b of the golf club shaft of the second embodiment. Instead of the ratio V _h / V _g , the representative value of the grip speed V _g is used as an index.
Here, the representative value of the grip speed V _g, for example, when dividing the grip speed V _g in a predetermined range, is that the center value in each section (average value). Besides this, as the representative value of the grip speed V _g, cut good numerical values in each section, or the like may be used users intelligible numbers.

In addition, the notation of the head speed V _h shown in the column of “corresponding head speed V _h display” shown in Table 3 and Table 4 above represents a representative value. In this case, in the segment of the head speed _{V h (25~34m} / s), cut of the good value of the median near the representative value, is displayed as "M-30". In each section of the other head speed V _h, the representative value of the minimum values in each section, are displayed in the format "M- minimum" in the second display area 24.

Based on the classification shown in Table 4, the representative value of the grip speed V _g is displayed on the representative value display area 32. “3.3” in the representative value display area 32 in FIG. 7A indicates that the grip speed V _g is 3.6 m / s or less. Further, “4.3” in the representative value display area 32 of FIG. 7B indicates that the grip speed V _g is in the range of 3.6 to 4.8 m / s. Further, “5.4” in the representative value display area 32 in FIG. 7C indicates that the grip speed V _g exceeds 4.8 m / s.

Also in this modified example, the golf club can display the representative value of the grip speed V _g in addition to the head speed V _h by displaying the representative value of the grip speed V _g together with the head speed V _h on the display portion 20c of the golf club shaft. Based on the value, a golf club having a golf club shaft suitable for the golf club can be selected. In addition, a golf club shaft suitable for oneself can be selected as a single golf club shaft.

Also in this embodiment, in addition to the representative value of the grip speed V _g also sets a plurality of levels depending on the value of the grip speed V _g, depending on the set level, letters, numbers or colors It may be assigned. In this case, color-coded the golf club shaft or not to display the character or numeric value corresponding to the value of the grip speed V _g on the display unit of the golf club shaft, or depending on the value of the grip speed V _g color, or color of the display unit You may do.
In this case, the set level in accordance with the value of the grip speed V _g, and the set character for each level, numerical or color are preferably recorded in the external display medium.
Even if it is such a display form, it cannot be overemphasized that the effect that each golf can select the golf club shaft suitable for each golfer as mentioned above is acquired.

Next, a third embodiment of the present invention will be described.
In the present invention, a plurality of levels corresponding to the value of the head speed V _h are set for the head speed V _h of the golf club immediately before the impact, and letters, numerical values, or colors are assigned according to the set level. Also good. In this case, it is possible to display the character or numeric value corresponding to the value of the head speed V _h to the golf club shaft. In addition, it is possible to color-coded the golf club shaft in a color corresponding to the value of the head speed V _h.

FIGS. 8A to 8C are schematic views showing a display portion of a golf club shaft of a golf club according to a third embodiment of the present invention.
In addition, the same code | symbol is attached | subjected to the same structure as the display part 20 of the golf club shaft 12 of the golf club 10 of 1st Embodiment shown to Fig.2 (a)-(c), and the detailed description is abbreviate | omitted. To do. 8A to 8C, the golf club and the golf club shaft are not shown.

In the present embodiment, the display portion 20d of the golf club shaft (not shown) has a second display area as compared with the display portion 20 (see FIGS. 2A to 2C) of the first embodiment. The index for selecting the golf club shaft displayed in 24 is displayed using an idiomatic expression for displaying the hardness of the golf club shaft instead of the head speed V _h of the golf club. However, the rest of the configuration is the same as that of the display unit 20 of the golf club shaft of the first embodiment. For this reason, the detailed description about the golf club of 3rd Embodiment and a golf club shaft is abbreviate | omitted.

In the present embodiment sets a plurality of levels corresponding to the value of the head speed V _h, depending on the set level, conventional representations for displaying the hardness of the golf club shaft is assigned.
Here, the conventional expression for indicating the hardness of the golf club shaft is generally from the order of hardness, Extra Stiff (abbreviation: X), Stiff (abbreviation: S), Regular (abbreviation: R), Average (Abbreviation: A), Ladies (abbreviation: L), and the like. Each abbreviation indicating hardness is also a conventional expression and can be understood by those skilled in the art.
In addition, there is also SR (abbreviation) that expresses an intermediate hardness between Stiff (abbreviation: S) and Regular (abbreviation: R). Furthermore, XX (abbreviation) and XXX (abbreviation) which express that it is harder than Extra Stiff (abbreviation; X) may be used. In addition, within the hardness of Regular (abbreviation: R), a plurality of stages may be provided such as R1 (abbreviation) and R2 (abbreviation). In addition, a part of the expression of hardness may be omitted, and the hardness may be displayed in four levels such as S (abbreviation), SR (abbreviation), R (abbreviation), L (abbreviation), A combination of the above-described hardness can be appropriately set by those skilled in the art.

Further, regarding the relationship between the hardness of the golf club shaft and the head speed V _h , the golf club shaft having a higher head speed V _h tends to select a relatively hard golf club shaft. As the hardness of the golf club shaft, bending hardness, primary bending natural frequency, or the like can be used.
Furthermore, those skilled in the art, as golfer head speed V _h is high, considering the tendency to select a relatively hard golf club shaft, performs the evaluation of the hardness of a golf club shaft, and the hardness of the appropriately be able to.

In the present embodiment, the second display area 24 of the display unit 20d is not intended to display a head speed V _h, instead of the head speed V _h, is for displaying the hardness of the golf club shaft. In FIGS. 8A to 8C, “X” indicating Extra Stiff (abbreviation: X) is displayed in the second display area 24. In addition, the value of the ratio V _h / V _g is displayed in the third display area 26 of the display unit 20d.

In the present embodiment, it is possible to achieve the same effects as in the first embodiment, the display portion 20d of the golf club shaft, in place of the head speed V _h, by displaying the hardness of a golf club shaft, A golfer can select a golf club having a golf club shaft suitable for the golf club shaft based on the ratio V _h / V _g in addition to the hardness of the golf club shaft instead of the head speed V _h . In addition, a golf club shaft suitable for oneself can be selected as a single golf club shaft.

Further, even when the golf club shaft hardness is set with respect to the level set according to the value of the head speed V _h, the value of the head speed V _h and the set golf club shaft hardness (abbreviation). Are included in a table, and this table is preferably expressed in the form of an external recording medium.

Incidentally, with respect to the level that is set according to the value of the head speed V _h, in addition to setting the hardness of a golf club shaft may be set such as numbers or colors. In this case, the value of head speed V _h, the relationship between such numerical values set or color, and fold the table, it is preferable to refer to this table in the form of external recording medium.
In the present embodiment, the second display region 24 of the display unit 20d may be color-coded with a color corresponding to the set hardness (including abbreviation) of the golf club shaft.

Next, a fourth embodiment of the present invention will be described.
FIGS. 9A to 9C are schematic views showing a display unit of a golf club shaft of a golf club according to a fourth embodiment of the present invention.
In addition, the same code | symbol is attached | subjected to the same structure as the modification of the display part 20a of the golf club shaft of the golf club which concerns on the 1st Embodiment of this invention shown to Fig.5 (a)-(c). Detailed description is omitted. 9A to 9C, the golf club and the golf club shaft are not shown.

In the present embodiment, the display unit 20e of the golf club shaft (not shown) is a second component compared to the display unit 20a (see FIGS. 5A to 5C) of the modified example of the first embodiment. The indicator for selecting the golf club shaft displayed in the display area 24 is displayed using a conventional expression for displaying the hardness of the golf club shaft instead of the head speed V _h of the golf club. The other configuration is the same as that of the display unit 20a of the golf club shaft of the modified example of the first embodiment. For this reason, the detailed description about the golf club of 4th Embodiment and a golf club shaft is abbreviate | omitted.

In the present embodiment, the hardness of the golf club shaft is displayed in the second display area 24 as “R (abbreviation)” and is displayed in the level display area 28 according to the value of the ratio V _h / V _g. The characters “LOW”, “MID”, and “HIGH” are displayed according to the set three levels (“LOW”, “MID”, and “HIGH”).
It is displayed in the level display area 28. The characters “LOW”, “MID”, and “HIGH” shown in FIGS. 9A to 9C correspond to those in Table 2 above, and thus detailed description thereof is omitted.

In the present embodiment, it is possible to achieve the same effects as in the first embodiment, in place of the head speed V _h to the display portion 20e of the golf club shaft, to display the hardness of a golf club shaft, the level display area 28, by displaying the ratio V _{h /} V _g values three stages of levels of characters set according to the golfer, the ratio V _h in addition to the hardness of a golf club shaft in place of head speed V _h / V _g level in accordance with the values as ( "LOW", "MID", "HIGH") reference can select a golf club having a golf club shaft adapted to them. In addition, a golf club shaft suitable for oneself can be selected as a single golf club shaft.
Also in the present embodiment, it is preferable that the hardness of the golf club shaft set according to each head speed range is recorded on the external display medium.

Next, a fifth embodiment of the present invention will be described.
FIGS. 10A to 10C are schematic views showing the display part of the golf club shaft of the golf club according to the fifth embodiment of the present invention.
In addition, the same code | symbol is attached | subjected to the same structure as the display part 20b of the golf club shaft 12 of the golf club 10 of 2nd Embodiment shown to Fig.6 (a)-(c), and the detailed description is abbreviate | omitted. To do. In addition, in FIGS. 10A to 10C, illustration of the golf club and the golf club shaft is omitted.

In the present embodiment, the display portion 20f of the golf club shaft (not shown) has a second display area as compared with the display portion 20b (see FIGS. 6A to 6C) of the second embodiment. The index for selecting the golf club shaft displayed in 24 is displayed using an idiomatic expression for displaying the hardness of the golf club shaft instead of the head speed V _h of the golf club. However, the other configuration is the same as that of the display unit 20b of the golf club shaft of the second embodiment. For this reason, the detailed description about the golf club of 5th Embodiment and a golf club shaft is abbreviate | omitted.

The hardness of the golf club shaft is set in each head speed range as shown in Table 5 below. The hardness of the golf club shaft in each head speed range can be appropriately set by those skilled in the art as in the third embodiment described above.
In the present embodiment, the head speed of “49 to 52 m / s” is “XX (abbreviation)”. A head speed of “46 to 49 m / s” was designated as “X (abbreviation)”. A head having a head speed of “43 to 46 m / s” was designated as “S (abbreviation)”. A head having a head speed of “40 to 43 m / s” was designated as “SR (abbreviation)”. A head speed of “37 to 40 m / s” was designated as “R (abbreviation)”. A head speed of “34 to 37 m / s” was designated as “A (abbreviation)”. A head speed of “25 to 34 m / s” was designated as “L (abbreviation)”.
Also in the present embodiment, it is preferable that the hardness of the golf club shaft set according to each head speed range shown in Table 5 below is recorded on an external display medium.
In addition, “−” shown in Table 5 below indicates “below” when it is on the front side of the numerical value, and indicates “exceeds” when it is on the rear side of the numerical value.

In the present embodiment, based on the classification shown in Table 5, the hardness of the golf club shaft is “S” (M−) in the second display area 24 as shown in FIGS. with display 43 or equivalent), the grip speed V _g is displayed on the gripping speed display area 30 of the display unit 20f. Since the description in the grip speed display area 30 in FIGS. 10A to 10C is the same as that in Table 3, detailed description thereof is omitted.

In the present embodiment, it is possible to achieve the same effects as in the first embodiment, the display portion 20f of the golf club shaft, in place of the head speed V _h, and displays the stiffness of a golf club shaft, the display unit By displaying the grip speed V _g in the grip speed display area 30 of 20f, the golfer can match the golf club suitable for himself with the grip speed V _g as a reference in addition to the hardness of the golf club shaft instead of the head speed V _h. A golf club having a shaft can be selected. In addition, a golf club shaft suitable for oneself can be selected as a single golf club shaft.

Next, a sixth embodiment of the present invention will be described.
FIGS. 11A to 11C are schematic views showing a display portion of a golf club shaft of a golf club according to a fifth embodiment of the present invention.
In addition, the same code | symbol is attached | subjected to the same structure as the display part 20c of the golf club shaft 12 of the golf club 10 of the modified example of 2nd Embodiment shown to Fig.7 (a)-(c), and the detail is shown. Description is omitted. Further, in FIGS. 11A to 11C, illustration of the golf club and the golf club shaft is omitted.

In the present embodiment, the display portion 20g of the golf club shaft (not shown) is a second component compared to the display portion 20c (see FIGS. 7A to 7C) of the modified example of the second embodiment. The indicator for selecting the golf club shaft displayed in the display area 24 is displayed using a conventional expression for displaying the hardness of the golf club shaft instead of the head speed V _h of the golf club. The other configuration is the same as that of the display unit 20c of the golf club shaft according to the modified example of the second embodiment. For this reason, the detailed description about the golf club of 6th Embodiment and a golf club shaft is abbreviate | omitted.

The hardness of the golf club shaft is set in each head speed range (section) as shown in Table 6 below. The hardness of the golf club shaft in each head speed range can be appropriately set by those skilled in the art as in the third embodiment described above.
In this embodiment, the head speed of “49 to 52 m / s” is “X2 (abbreviation)”. A head speed of “46 to 49 m / s” was designated as “S1 (abbreviation)”. A head speed of “43 to 46 m / s” was designated as “S2 (abbreviation)”. A head speed of “40 to 43 m / s” was designated as “R1 (abbreviation)”. A head speed of “37 to 40 m / s” was designated as “R2 (abbreviation)”. A head speed of “34 to 37 m / s” was designated as “L1 (abbreviation)”. A head speed of “25 to 34 m / s” was designated as “L2 (abbreviation)”.
Also in this embodiment, it is preferable that the hardness of the golf club shaft set according to each head speed range shown in Table 6 below is recorded on an external display medium.
In addition, “−” shown in Table 6 below indicates “below” when it is on the front side of the numerical value, and indicates “exceeds” when it is on the rear side of the numerical value.

In the present embodiment, based on the classification shown in Table 6 above, as shown in FIGS. 11A to 11C, the hardness of the golf club shaft is “S2” (M− with display 43 or equivalent), a representative value of the grip speed V _g is displayed on the representative value display area 32. Since the representation in the representative value display area 32 of FIGS. 11A to 11C is the same as that of the modification of the second embodiment, detailed description thereof is omitted.

In the present embodiment, it is possible to achieve the same effects as in the first embodiment, the display portion 20g of the golf club shaft, in place of the head speed V _h, displayed the hardness of a golf club shaft, the display unit 20g By displaying the representative value of the grip speed V _{g in} the representative value display area 32 of the golf player, the golfer can use the representative value of the grip speed V _g in addition to the hardness of the golf club shaft instead of the head speed V _h as a reference. A golf club having a golf club shaft adapted to the above can be selected. In addition, a golf club shaft suitable for oneself can be selected as a single golf club shaft.

  The golf club shaft according to the present invention has been described in detail above. However, the present invention is not limited to the above embodiment, and various improvements and modifications are made without departing from the gist of the present invention. Also good.

1 is a schematic diagram showing a golf club according to a first embodiment of the present invention. (A)-(c) is a schematic diagram which shows an example of the display part which displays the parameter | index for selecting the golf club shaft in the golf club of this embodiment. It is a schematic diagram which shows an example of the display screen of the display apparatus in a golf swing analysis system. It is a graph which shows the relationship between the head speed and grip speed just before an impact, and an appropriate kick point. (A)-(c) is a schematic diagram which shows the modification of the display part of the golf club shaft of the golf club which concerns on the 1st Embodiment of this invention. (A)-(c) is a schematic diagram which shows the display part of the golf club shaft of the golf club which concerns on the 2nd Embodiment of this invention. (A)-(c) is a schematic diagram which shows the modification of the display part of the golf club shaft of the golf club which concerns on the 2nd Embodiment of this invention. (A)-(c) is a schematic diagram which shows the display part of the golf club shaft of the golf club which concerns on the 3rd Embodiment of this invention. (A)-(c) is a schematic diagram which shows the display part of the golf club shaft of the golf club which concerns on the 4th Embodiment of this invention. (A)-(c) is a schematic diagram which shows the display part of the golf club shaft of the golf club which concerns on the 5th Embodiment of this invention. (A)-(c) is a schematic diagram which shows the display part of the golf club shaft of the golf club which concerns on the 6th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Golf club 12 Golf club shaft 14 Grip 15 Grip end 16 Golf club head 18a Face part 18b Hosel part 20, 20a, 20b, 20c, 20d, 20e, 20f, 20g Display part 22 1st display area 24 2nd display Area 26 Third display area 28 Level display area 30 Grip speed display area 32 Representative value display area 40 Display screen 42 Graph part 43a, 43b Curve 44 Drawing part 45 Trajectory 46 Characteristic display part 48 Menu button

Claims (16)

A golf club having a golf club shaft, a grip covering one end of the golf club shaft, and a golf club head attached to the other end of the golf club shaft,
It is indicated that the ratio V _h / V _g between the golf club head speed V _h and the grip speed V _g immediately before the impact, which is an index of a golf swing of a golfer that fits the golf club shaft, is displayed on the golf club shaft. A featured golf club. A golf club having a golf club shaft, a grip covering one end of the golf club shaft, and a golf club head attached to the other end of the golf club shaft,
The golf club shafts are color-coded according to the ratio V _h / V _g between the head speed V _h of the golf club immediately before the impact and the grip speed V _g , which is an index of the golf swing of the golfer that fits the golf club shaft. A golf club characterized by that. A golf club having a golf club shaft, a grip covering one end of the golf club shaft, and a golf club head attached to the other end of the golf club shaft,
A plurality of levels are set according to the ratio V _h / V _g between the golf club head speed V _h just before impact and the grip speed V _g , which is an index of a golf swing of a golfer adapted to the golf club shaft. Characters, numerical values, or colors are assigned according to the set level, and the characters or numerical values corresponding to the value of the ratio V _h / V _g are displayed on the golf club shaft, or the ratio A golf club characterized in that the golf club shaft is color-coded with a color corresponding to the value of V _h / V _g . A golf club having a golf club shaft, a grip covering one end of the golf club shaft, and a golf club head attached to the other end of the golf club shaft,
A golf club characterized in that a golf club head speed V _h and a grip speed V _g of a golf club immediately before impact, which are indicators of a golf swing of a golfer adapted to the golf club shaft, are displayed on the golf club shaft. A golf club having a golf club shaft, a grip covering one end of the golf club shaft, and a golf club head attached to the other end of the golf club shaft,
A plurality of levels are set according to the value of the head speed V _h of the golf club immediately before the impact, and characters, numerical values, or colors are assigned according to the set level, and according to the value of the head speed V _h wherein either the character or number is displayed on the golf club shaft, or golf club shaft is color-coded according to the value of the head speed V _h, further gripping speed V _g is displayed on the golf club shaft was A golf club characterized by The grip speed V _g is set at a plurality of levels according to the value, and characters, numerical values, or colors are assigned according to the set level, and the character according to the value of the grip speed V _g is assigned. or numerical golf club according to claim 5 or displayed on the golf club shaft, or said golf club shaft in a color corresponding to the value of the grip speed V _g is color-coded. A golf club having a golf club shaft, a grip covering one end of the golf club shaft, and a golf club head attached to the other end of the golf club shaft,
A plurality of levels are set according to the value of the head speed V _h of the golf club immediately before the impact, and characters, numerical values, or colors are assigned according to the set level, and according to the value of the head speed V _h wherein either the character or number is displayed on the golf club shaft, or said golf club shaft in a color corresponding to the value of the head speed V _h is color-coded with a further said head speed V _h, the ratio of the grip speed V _g A golf club characterized in that V _h / V _g is displayed on the golf club shaft. The ratio V _h / V _g is set to a plurality of levels according to the value, and according to the set level, characters, numerical values or colors are assigned, and the value of the ratio V _h / V _g The golf club according to claim 7, wherein the character or numerical value corresponding to the number is displayed on the golf club shaft, or the golf club shaft is color-coded with a color corresponding to the value of the ratio V _h / V _g . A golf ball characterized by a ratio V _h / V _g between a head speed V _h of a golf club immediately before impact and a grip speed V _g , which is an index of a golf swing of a golfer adapted to the golf club shaft. Club shaft. It is characterized by being color-coded according to the ratio V _h / V _g between the head speed V _h of the golf club immediately before impact and the grip speed V _g , which is an index of golf swing of a golfer adapted to the golf club shaft Golf club shaft to play. A plurality of levels are set according to the ratio V _h / V _g between the golf club head speed V _h just before impact and the grip speed V _g , which is an index of a golf swing of a golfer adapted to the golf club shaft. In accordance with the set level, characters, numerical values or colors are assigned, and the characters or numerical values corresponding to the values of the ratio V _h / V _g are displayed, or the ratio V _h / V A golf club shaft characterized by being color-coded by a color corresponding to the value of _g . A golf club shaft, wherein a golf club head speed V _h and a grip speed V _g of a golf club immediately before impact, which are indices of a golf swing of a golfer adapted to the golf club shaft, are displayed. A plurality of levels are set according to the value of the head speed V _h of the golf club immediately before the impact, and characters, numerical values, or colors are assigned according to the set level, and according to the value of the head speed V _h The golf club shaft, wherein the letters or numerical values are displayed, or are color-coded according to the color corresponding to the value of the head speed V _h , and further the grip speed V _g is displayed. The grip speed V _g is set at a plurality of levels according to the value, and characters, numerical values, or colors are assigned according to the set level, and the character according to the value of the grip speed V _g is assigned. or golf club according to claim 13, numeric is color-coded in accordance with the value of either displayed or the grip speed V _g. A plurality of levels are set according to the value of the head speed V _h of the golf club immediately before the impact, and characters, numerical values, or colors are assigned according to the set level, and according to the value of the head speed V _h wherein either the character or number is displayed, or is color-coded according to the value of the head speed V _h, it is further and the head speed V _h, displayed the ratio V _{h /} V _g with gripping speed V _g was A golf club shaft characterized by The ratio V _h / V _g is set to a plurality of levels according to the value, and according to the set level, characters, numerical values or colors are assigned, and the value of the ratio V _h / V _g The golf club according to claim 15, wherein the character or numerical value according to the number is displayed or is color-coded by a color according to the value of the ratio V _h / V _g .

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