JPH0274270A - Balance meter for golf club - Google Patents

Abstract

PURPOSE:To enable the kinds of the balances of pertinent clubs to be easily displayed by computing a moment on a golf club centroid around a reference point, through detected loads at a fulcrum section and a grip end engaging section. CONSTITUTION:A fulcrum section 11 and a grip end engaging section 12 for bearing a club shaft 8 are arranged at a reference point distance 3 doubled from a grip end 13, and are provided with load detecting means 15, 16, respectively. These load detecting means are connected to a moment computing means 18 for computing a moment M on the centroid of this golf club around said reference point, through the detected loads R1, R2 of said detecting means. Besides, the scale of the moment is displayed by a balance displaying means 20. As this result, just by mounting the club, the kind of the balance of the club can be displayed, and not only in case of a 12-inch system on this display, but also in case of the other system of a different reference point distance S, measuring can be easily performed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a measuring device for measuring the balance type of a golf club.

A conventional golf club (hereinafter simply referred to as a club) has a center of gravity G and a point S (hereinafter referred to as a reference point) which is considered to be the center of swing of the attitude of the club during a swing, as shown in Fig. 8.
exists. Therefore, even if you swing a club of the same type, if the center of gravity G is closer to the head side, the swing will feel heavy due to the moment relationship around the reference point 8, and if the center of gravity G is closer to the reference point S, the swing will feel lighter. Also, the weight of the club ff1 (
Even if W) is different, the weight of the swing feels the same depending on the position of the center of gravity G.

In other words, the weight felt when swinging is determined by the moment around the center of gravity G at reference point 8.

Therefore, in practice, the position 12 inches from the grip end is set as the reference point S, and the moment around this point is excluded.
The size is divided into stages from A to Fo, and each division is further divided into 10 stages to set a balance type code. For example, this balance type code is displayed for each club book, such as WDo.

WDo is a balanced type of wood. In what sense is this club a club whose fulcrum is 12 inches from the grip end and whose center of gravity G is balanced when a 20 ounce weight is attached to the grip end, that is, a moment of 240?・Indicates that it is a ounce club. Then, when the moment 1 to 2 chin ounces increases around this, the balance type becomes WD1, and conversely, when the moment decreases by 2 chin ounces, the balance type becomes WO2.

That is, the balance type is code A. This shows that the moment is larger in order from Fo to Fo, and within the same category, for example, A1 is a larger moment than A. In the case of iron, it is displayed as IDo, and the overall balance is shifted 2 points higher than the balance type of wood (ID.

=WD2).

To measure such balance types, conventionally, a scale type body-side device as shown simply in FIG. 9 has been used.

In this device, a fulcrum 2 is set on a frame 1, a feed weight 3 is slidably inserted into the fulcrum, and a pole 6 is mounted, which has a club shaft support part 4 at the front end and a grip end engagement part 5 at the rear end. (In the figure, the feed weight 3 is at the measurement position.)

In addition, in the range in which the feed weight 3 moves, a scale 7 with a balance type code is provided at a position determined in advance by measurement using the above-mentioned method.

Further, the distance between the front surface of the grip end engaging portion 5 and the fulcrum 2 is 12 inches, the fulcrum 2 is the reference point S, and the reference point 111t(s) is 12 inches.

For measurement, the grip end of the club 8 is brought into contact with the grip end engaging portion 5 as shown in the figure, the club 8 is placed on the pole 6, and the position of the feed weight 3 is adjusted. And Sao 6
When the balance is achieved, the balance type code indicated by the feed weight 3 at that position is read.

However, with such a mechanical measuring device, the feed weight 3 must be adjusted each time, which makes it inefficient for measuring even the largest clubs. Also, the reference point distance (s)
There are cases where other numerical values are adopted, but there is a drawback that it is not possible to respond immediately to such cases and it is necessary to prepare a complicated table of old and new items.

In fact, in the UK, the above-mentioned 11! (s) uses 12 inches [12-inch system], whereas in the United States it uses [14-inch system] even though the same calculation is performed.

Problems to be Solved by the Invention This invention allows the balance type of the club to be displayed simply by placing the club thereon, and this display is not limited to the 12-inch system, but can be applied to other systems with different reference point distances (s). To provide a golf club balance meter that can easily measure even in the case of.

Means for Solving the Problems: A fulcrum part for supporting the club shaft, a grip end engaging part, a load detection means, a moment calculation means, and a balance display means are provided.

The fulcrum part and the grip end engaging part are arranged at twice the reference distance (s), and each is provided with a load detection means.

The load detection means is connected to the moment calculation means.

The moment calculation means includes a detection cylinder ff1 (R1) (R2).
From this, the moment (M) regarding the weight of the golf club around the reference point is calculated.

The magnitude of the moment (M) is displayed on the balance display means.

Furthermore, if necessary, the moment (M) corresponding to the reference point 11t(s-) may be transferred between the means for inputting another reference point distance (si, the moment calculating means, and the balance display means). ) will be provided.

A type encoding means is provided which encodes the magnitude of the moment (M) based on a predetermined range and a predetermined unit, and uses each code as the magnitude of the moment.

A mold setting means for calculating the weight ω of the golf club from the detected load (R) (R2) and a weight display means for displaying the weight are provided.

Embodiment In FIG. 1, a balance meter 9 includes a frame 10 with a fulcrum part 11 and a grip end engaging part 12 projecting upward from the surface of the frame 10. Grip end engagement part 12
As shown in the figure, the clip end 13 of the hook 14 is hook-shaped so as to engage from above the grip end 13 of the club 8, which is partially placed on the fulcrum 11 with the shaft 71.
The contact surface with the top surface of the fulcrum part 11 and the shaft of the club 8 are arranged at a position that keeps them substantially horizontal.

The distance between the fulcrum part 11 and the grip end engaging part 12 is twice the reference point distance (s) of the 12-inch method, that is, 24 inches.
A load detection means 15, 16 consisting of a load cell is attached to the lower part of.

The symbol @17 is attached to the frame 1 (pulled total σ/display device, inside the case there are moment loss means 18, type encoding means 19, balance display means 20, conversion means 21, weight ff
It includes a 1R output means 22, a gravimetric display stage 23, and another reference point distance input means 24 (FIG. 2).

In FIG. 1, the front panel of the weighing/display device 17 is
It is provided with a balance type code display window 25, a pattern seedling display window 26, and a reference point distance changeover switch 27. In this embodiment, switching is made from 12 inches to 14 inches.

Reference numeral 28 is a vibration isolating leg for adjusting inclination, and reference numeral 29 is a level.

Now, when the power of the balance meter 1 is turned on and operated, and the club 8 is placed on the fulcrum part 11 with its grip end 13 in contact with the grip end engaging part 12 and the shaft is placed on the fulcrum part 11, as shown in FIG. From the detected value of ゜16, that is, the detected load M (R1? (R2)), the balun type code and weight of the club are displayed in each display window 2 after passing through the above-mentioned means.
5.26 will be displayed.

When the reference point 111(s) is set to 14 inches, if the reference point changeover switch 27 is operated to the 14 inch side, the balance type display code will be displayed converted to 14 inches.

By the way, the reference point changeover switch 27 is multi-stage,
11 (s) for the current reference point to other reference point distances (s
-) can also be set.

The operation of the balance meter 1 is based on the general principle shown below.

As shown in Figure 3, 8 distances 1) if(s) (a) (
1ri, heavy ffi (W), Mffi (R1) (
R,,) wo fixed email. So, from the figure, O=S+a R1=W-1-R2, W=・R1 2s-R1= (2s+a) ``R1= <2s+a)- ■From ■, R2 [Actually seriously ill] ・W...■ ...■ ...■ ...■ 2s-R1/W=2s+a a=2s 6 (R1/W 1 ) -25-(R1-W>/W Substitute ■, a= C2R2/ (R1- R2))-s...■
Therefore, s+a=s+ (2R/ (R1-R2))・S−S・
(1+2R/(R-R2)) = ((R-R2)/(R,-R2)) #S...■ From ■, ■, ■, W-1=W ・ (s+a) = (R-・R2) [(R1+R2)/(R1-R2
))・S = (R1-+-R,,)・S == M ......[Actual moment]
...■ From the above, the moment calculation means 18 calculates the detected load (R) (
R2) and the reference point distance (s) input in advance
From this, we obtain M= (R+R2)・S.

In the type encoding means 19, the moment (M) is
Processed according to the flow shown in the figure. The flow measures iron balance type codes IAo to IF9 and wood balance type codes WB-WF2 in the 12-inch method. Pruning is done. The reason why (M) is divided by the numerical value 2 is because 2 chin ounces of moment is the minimum unit of the type code (for example, there is a difference of 1 point between 10 and ID1). The reason for subtracting the number 92 (in the case of iron) and the number 90 (in the case of wood) from M is to make (M) = 240" ounces WDo. In the case of iron, the subtraction number is 92 because: This is to correspond to the fact that, as mentioned above, the current balance code for irons is 2 points higher than that for woods.The calculation of 31 in S2 is rounded to the second decimal place.

The steps from 83 to 824 are steps for determining balance type codes, and the types are determined in descending order of moment (M). (remainder) is (
18-1) or <WB-1). The determined type code is then output to the balance display means 20 in S25.

The conversion means 21 calculates M = = M - 2W (W...club heavy equipment), and converts Ml into the converted moment (M') of the 14-inch system with respect to the moment (M) of the 12-inch system.
).

This is based on the following principle. In FIG. 5, (a) shows the case of the 12-inch system, and (b) shows the case of the same club using the 14-inch system. In the figure, M = W (L-12>) ... From the grip end 13 of the club to the center of gravity G
Distance to M'-W (L-14) Therefore, M-M'-2W ,', M==M-2W In addition, in this nasal replacement method, the reference point distance (s) is changed to (s') In general, IvI=M-(s=-S)W.

Then, this converted moment (M') is processed in the type encoding means 19 as shown in FIG.

What is read in Sl (step 1) is (M-), and dividing (M') by the number 1.75 at $2 is 1
This is because in the case of the 4-inch system, the minimum unit of the type code is defined as 1.75 + ounce of moment. In addition,
In the case of the 14-inch system, there is no distinction between wood and iron, and the type code is A. -09.

The weight calculation means 22 uses the above formula 0, W-R, -R,.

is extracted and transmitted to the weight display means 23.

Another reference point distance switching means 24 is shown in FIG.
This flag is used to set a flag for making a decision. If it is not the 12-inch format, the process goes through the conversion means 21 and then connects to the flow shown in FIG.

Balance display means 20. The weight display means 23 has a well-known structure that digitally displays numbers in each display window 25,26.

Although the embodiments have been described above, the reference point distance (s) is not limited to 12 inches or 14 inches in the present invention. The balance type may be displayed not by the code but by the moment (M) or (M') itself, and even if it is a code like the one in the example, the numerical part may be displayed in more detail by more digits. be.

Furthermore, in the case of a 12-inch system, it is possible to display only the balance type related to either iron or wood, input a known balance type and display a new converted type, or add a printing device to the frame to display the balance type. It is also possible to print the display on a label or the like at the same time as displaying the type code.

Effects of the invention The balance type is displayed just by placing the golf club on it.

Switching display can be easily performed in both 12-inch and 14-inch formats.

[Brief explanation of the drawing]

Figure 1 is a front view, Figure 2 is a block diagram showing the operation, and Figure 3 is a front view.
The figure is a diagram of the measurement principle, and Figure 4 is a flow diagram of the type encoding means.
5 is a conversion principle diagram, FIG. 6 is a flow diagram of the type encoding means, FIG. 7 is a switching flow diagram, FIG. 8 is a simplified front view, and FIG. 9 is a front view. DESCRIPTION OF SYMBOLS 1... Frame, 2... Fulcrum, 3... Feed weight, 4... Shaft support part, 5... Grip end engagement part, 6... Saddle, 7... Scale, 8 ···club,
9... Balance meter, 10... Frame, 11...
Fulcrum part, 12...Grip end engagement part, 13...
Grip end, 14... Hook, 15. 16... Load detection means, 17... Calculation/display device, 18... Moment calculation means, 19... Type encoding means, 20...
- Balance display means, 21... Conversion means, 22...
Weight calculating means, 23... Mold set display step, 24... Other reference point distance input means, 25... Balance type code display window, 26... Weight display window, 27... Reference point distance Changeover switch, 28... legs, 29... level.

Claims (4)

[Claims] (1) The fulcrum part that supports the club shaft and the grip end engaging part are arranged at twice the reference point distance (s) from the grip end, and a load detection means is provided for each, and these load detection means are used to detect the detected load. From (R_1) (R_2),
A balance meter for a golf club, characterized in that it is connected to a moment calculation means for calculating a moment (M) regarding the center of gravity of the golf club around the reference point, and further comprises a balance display means for displaying the magnitude of the moment. (2) Between the means for inputting another reference point distance (s'), the moment calculation means, and the display means, the moment (M) is converted into a moment (M') corresponding to the new reference point distance (s'). 2. The golf club balance meter according to claim 1, further comprising a conversion means for converting into . (3) A type encoding means is provided which encodes the magnitude of the moment (M) based on a predetermined range and a predetermined unit, and uses each code as the magnitude of the moment. 2. The golf club balance meter according to item 2. (4) Any one of claims 1 to 3, further comprising a weight calculation means for calculating the weight of the golf club from the detected loads (R_1) (R_2) and a weight display means for displaying the weight. Balance meter for the listed golf club.