JP7790693B2 - Golf insoles - Google Patents

Description

The present invention relates to an insole that supports the maintenance of the inclination angle of the motion axis and the rotation of the motion axis during a golf swing.

Mistakes that can occur in golf include a slice, where the ball curves sharply to the right, a hook, where the ball curves sharply to the left, a top, where the golf club head (the part that hits the ball at the tip) hits the top of the ball, and a duff, where the ball hits the ground in front of it.

There are various causes for this, but the most important and fundamental factor is that the tilt angle of the axis of movement using the adductor muscles on the inside of the thigh cannot be maintained and rotated smoothly, or the tilt angle deviates significantly from the appropriate angle.

The appropriate angle of inclination of the medial axis of motion of the right foot (for a right-handed person) from the start of the backswing to the top (vertex) of the swing is approximately 5 to 10 degrees clockwise as viewed from the front, assuming that the angle of an imaginary line extended vertically from the ground is 0 degrees, as shown in Figure 1.

Furthermore, the appropriate angle of inclination of the inner axis of motion of the left foot (for a right-handed player) from the downswing when swinging the club down to the follow-through is approximately 7 to 8 degrees counterclockwise as viewed from the front, assuming that the angle of an imaginary line extended vertically from the ground is 0 degrees, as shown in Figure 2.

In other words, to prevent a bad shot in golf, you need to maintain an appropriate angle of 5 to 10 degrees for your right foot from the backswing to the transition and rotate smoothly, and maintain an appropriate angle of 7 to 8 degrees for your left foot from the downswing to the follow-through and rotate smoothly.

To maintain the tilt angle of the axis of movement and rotate smoothly, it is necessary to rotate using the adductor muscles. However, in everyday life, the adductor muscles are not used much, so they tend to lose strength, and they are the muscles that weaken most easily with age. As a result, the adductor muscles cannot withstand the centrifugal force of the swing, causing the ball of the foot to lift up and weight to shift toward the little finger, making it difficult to maintain the appropriate tilt angle of the axis of movement.

Therefore, in order to rotate the movement axis smoothly, Patent Document 1 discloses a device characterized by molding a mortar-shaped part on the ball of the left foot (for right-handed people).

Furthermore, Patent Document 2 discloses a shoe characterized in that the outer part of the heel is elevated to shift the body weight to the toe part.

Furthermore, Patent Document 3 discloses a device characterized in that the outer side of the sole is higher than the inner side for the purpose of correcting swing form.

Patent Publication No. 2021-62164 Patent Publication No. 2018-114271 JP 8-228802

Patent Document 1 claims that making the ball of the left foot mortar-shaped can promote smooth rotation. However, the ball of the foot is the starting point of the rotation axis, and to achieve this, the big toe connected to the ball of the foot needs to bend and brace itself as if gripping the ground, and sinking of the ball of the foot is thought to hinder this. Furthermore, maintaining the inclination angle of the left foot's movement axis and rotating around the ball of the left foot as the starting point is greatly influenced by the inclination angle of the right foot's movement axis and the bracing of the ball of the right foot, so measures are needed not only for the ball of the left foot but also for the ball of the right foot.

In Patent Document 2, the outer part of the heel is made higher than the inner part of the heel, thereby suppressing the outward movement of the calcaneus and shifting the weight toward the toes. However, if the little toe side of the sole remains low, the center of gravity will tend to shift toward the little toe due to the structure of the foot, and this is thought to be an insufficient solution.

In Patent Document 3, simply making the outside of the sole higher than the inside limits the range of motion of the ankle and is expected to cause weight to shift to the inside of the heel, making it difficult to smoothly shift weight to the ball of the foot.

SUMMARY OF THE INVENTION In view of the above, the present invention provides an insole that maintains an appropriate inclination angle of the left and right feet to prevent mishits and allows smooth rotation of the axis of movement.

The golf insole of the present invention is a pair of insoles inserted into the left and right sides of a golf shoe, and is characterized in that the base of the big toe A, which corresponds to the ball of the left and right feet, is molded lower than the inner heel B, outer heel C, and base of the little toe D.

Furthermore, the inclination angle of cross section E (from A to D) and cross section F (from B to C) is approximately the same, and this inclination angle is between 4 and 8 degrees. By making the inclination angle the same, D is higher than A, B, and C, which makes it possible to suppress lifting of the ball of the foot and weight shift toward the little finger.

Another feature is that the thickness gradually increases at the base of the big toe A, the inner heel B, the outer heel C, and the base of the little toe D. The difference in height between these is 2 to 5 mm between A and B, 5 to 10 mm between B and C, and 1 to 5 mm between C and D.

According to this invention, it is possible to stabilize the inclination angle of the inner movement axis of the right foot (for right-handed players) from the backswing to the top, and the inclination angle of the inner movement axis of the left foot (for right-handed players) from the downswing to the follow-through.

In addition, the center of gravity is more likely to shift to the balls of the left and right feet, making it easier for the thumbs that support them to grip the ground and bend and step forward, making it easier to make a smooth, stable, and powerful swing.

This shows the appropriate tilt angle of the axis of motion during a golf backswing. If the angle of a line extending vertically from the ground is 0 degrees, the appropriate tilt angle is approximately 5 to 10 degrees clockwise. This shows the appropriate tilt angle of the axis of movement from the downswing to the follow-through. If the angle of the line extending vertically from the ground is 0 degrees, the appropriate tilt angle is approximately 5 to 8 degrees counterclockwise. If these values are too large or too small, it can cause trouble with the shot. Plan view of the present invention, the position of the base of the big toe A, the inner heel B, the outer heel C, and the base of the little toe D, and the positional relationship between the cross section E from A to D and the cross section F from B to C. 4 is a cross-sectional view of section E and section F in FIG. 3 .

In this embodiment, an example of the shape and material of a pair of insoles of the present invention to be fitted into golf shoes will be described.

Taking the average size of a men's insole, 25.5 cm, as an example, if the inclination angle between cross section E and cross section F is 5 degrees, the thickness of the base of the big toe A is 3 mm, the inner heel B is 6 mm, the outer heel C is 12.7 mm, and the base of the little toe D is 13.6 mm.

To prevent the inclination angle from collapsing, the bottom of the insole is made of a hardening ethylene vinyl acetate or polyurethane material as the base material. To reduce fatigue, an elastic urethane material is attached to the middle part of the insole, but the thickness of the material is thinner at the base of the big toe (A). Furthermore, synthetic fibers such as polyester or nylon are attached to the surface to provide frictional resistance and allow the toes to grip the surface. The total of these multi-layer structures is adjusted to the value of step [0023].

A. Base of the thumb B. Inner heel (thumb side)
C Outer heel (little toe side)
D. Base of little finger E. Cross section E (cross section line from A to D)
F Section F (section line from B to C)

Claims (3)

A pair of golf insoles , each having a base of a big toe A molded lower than an inner heel portion (thumb side) B, an outer heel portion (little toe side) C, and a base of a little toe D,
The thickness of the insole gradually increases from the base of the big toe A, the medial heel portion (big toe side) B, the lateral heel portion (little toe side) C, and the base of the little toe D.
2. The insole according to claim 1 , wherein the thickness of the insole at the base of the big toe A is 10 mm or more less than the thickness of the insole at the base of the little toe D. 2. The insole according to claim 1, wherein an inclination angle of a cross section E from the base of the big toe A to the base of the little toe D is the same as an inclination angle of a cross section F from the medial heel portion (thumb side) B to the lateral heel portion (little toe side) C.