JP4146299B2 - Golf club swing correction device and golf club incorporating the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a golf club swing correcting device and a golf club incorporating the same.
[0002]
[Prior art]
[Patent Document 1]
JP-A-10-234916 [Patent Document 2]
JP, 11-89988, A There are various proposals as a golf club swing correction device, but those that generate impact sound at the time of hitting a ball using a sensor or an IC circuit are expensive and are not so popular. I can not expect. Therefore, a weight provided so as to be movable in the axial direction of the shaft without using electronic components and a stop member for stopping the weight at a predetermined position are provided, and the impact sound is generated when the weight collides with the stop member during swinging. An instrument to be generated has been proposed (Patent Document 1). In addition, a backing plate is affixed to the outer peripheral surface of the shaft, one end of the leaf spring is fixed in parallel with the shaft near the backing plate, and a weight is attached to the other end of the leaf spring. An instrument that generates an impact sound by colliding with a receiving plate has also been proposed (Patent Document 2).
[0003]
[Problems to be solved by the invention]
However, since conventional inexpensive training instruments including the instruments described in each of the above patent documents generate an impact sound simply by swinging, it is not possible to judge the quality of the swing foam, and to correct the swing. Is not helpful.
Therefore, an object of the present invention is to provide a swing correction device that emits an impact sound only when a correct swing is performed.
[0004]
[Means for Solving the Problems]
In order to solve the problem, a swing correcting device for a golf club according to the present invention includes:
When equipped with a square cylinder that can be fixed in the shaft of the golf club, and a movable body that is movable in the axial direction within the cylinder, and when the outer peripheral four surfaces of the cylinder are sequentially A-plane, B-plane, C-plane, and D-plane,
The cylinder has stoppers for stopping the movement of the moving body at both ends, and holes are formed at the same axial position near the grip side stopper on the A surface and the C surface facing the A surface ,
The movable body has a plate-like shape orthogonal to the B-plane and the D-plane, and has a main body that is long in the axial direction and has an obtuse angle with the A-plane as the opposite side at the midpoint, and a fulcrum extending from the midpoint toward the A-plane , The main body has first (A-side) and second (C-side) hooks that are formed at the grip end of the main body so as to extend toward the A-plane and C-plane , respectively. The center of gravity exists on the head side of the fulcrum , and the first hook is in an axial position closer to the head than the second hook .
The main body swings according to the direction of the fulcrum due to the difference between the gravitational moment on the head side and the gravitational moment on the grip side. When the head side end is in contact with the C surface, it is in contact with the first hook , the A surface. head when stopping the movement of the moving body, the center of gravity in a state where the head-side end portion is in contact with the surface a is subjected to a centrifugal force toward the head side by being caught in the hole where the second hook correspond when side end portion, characterized in that the Rukoto without mobile scratching either the hook by departing the second hook leverage at the same time raised from the a side is movable.
[0005]
According to this correction device, when the club with the correction device fixed to the shaft is set up vertically so that the head faces upward, the grip side end of the main body hits the grip side stopper and stops. If it is gently lowered to the address position as it is, the head side end of the main body swings downward in the direction of gravity, and at the same time the grip side end rises upward and the first (A side) hook is hooked in the corresponding hole. The moving body does not fall. Next, when the club is lifted from the address to the top, the main body head side is swung in the radial direction as the shaft is reversed, the first hook is detached, and the second (C surface side) hook is caught in the corresponding hole. Therefore, the axial position of the moving body does not change.
When swinging down correctly from that state, that is, when the grip is pulled down with the left side lead, the main body head side end portion is lifted by the centrifugal force at the start of the swing, and the second hook is released by the lever action. The subsequent centrifugal force of the swing acts in the axial direction, so that the moving body moves and collides with the head side stopper, generating an impact sound.
On the other hand, when the head is swung from the top state so that the head is rotated around the grip, the centrifugal force is poor and the radial force is large, so the moving body is only pressed against the inner surface of the cylinder and does not move. Therefore, no impact sound is emitted.
Thus, it is possible to immediately and easily determine whether the swing is good or not based on the presence or absence of an impact sound.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the orthodontic appliance of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of an essential part showing a golf club in which a correction tool of an embodiment is fixed in a shaft.
The correction tool 20 is built in the shaft 31 of the golf club 30. The orthodontic appliance 20 includes a metal square tube 1 that can be fixed in a shaft 31, and the same metal moving body 6 that can move in the tube 1 in the axial direction. For convenience, the four side surfaces of the cylinder 1 are referred to as an A surface, a B surface, a C surface, and a D surface. FIG. 1 is cut along a plane parallel to the B and D planes.
[0007]
The cylinder 1 has stoppers 3 and 4 for stopping the movement of the moving body 6 at both ends, and holes 5 and 11 are formed in the A surface close to the grip side stopper 3 and the C surface facing it. The head side edge 5a of the hole 5 is bent slightly inward. The moving body 6 has a main body 12, a fulcrum 7, and hooks 8 and 9. The main body 12 is formed by cutting and bending a thick metal plate and forms an obtuse angle of 170 degrees at a position that is long in the axial direction and about 2/3 from the end on the head side. Then, the hook 9 is integrally formed by bending the grip side end portion about 90 degrees outward. The fulcrum 7 and the hook 8 are obtained by cutting one thin metal plate 13 and bending it into a U-shaped cross section consisting of two parallel surfaces with different radial lengths and one surface between them. The longer one of the two parallel surfaces functions as a fulcrum 7 and the shorter one functions as a hook 8. The metal plate 13 is fixed to the main body 12 by means such as welding or caulking so that the base of the fulcrum 7 coincides with the bent position of the main body 12 and the base of the hook 8 coincides with the vicinity of the back surface of the hook 9. Therefore, the hook 8 and the hook 9 extend in opposite radial directions starting from the grip end of the main body 12. The center of gravity of the moving body 6 exists on the head side with respect to the fulcrum 7.
[0008]
The relationship between the hooks 8 and 9 and the holes 5 and 11 depends on the orientation of the club 30. First, in FIG. 1, when the A surface is in the direction of gravity and the C surface is down, the center of gravity of the moving body 6 exists at the above position. Grip side end is raised. The tip of the fulcrum 7 and the A surface have a slight play. Therefore, the hook 9 is not caught in the hole 11, and the hook 8 is engaged with the head side edge 5 a of the hole 5. On the other hand, when the direction of the club 30 is changed and the A and C planes are turned upside down, the fulcrum 7 is landed on the A plane and the head side end portion 10 is in contact with the A plane. At the same time, the grip side end part is lifted, the hook 8 is separated from the hole 5 and the hook 9 enters the hole 11.
[0009]
The operation of this corrector 20 will be described below. When the club 30 stands vertically so that the head is on the top, the hook 9 hits the grip side stopper 3 and stops. At this time, the axial position of each element is in the order of the hook 9, the hook 8, the end edge 5a, and the fulcrum 7 from the grip side. When it is gently lowered to the address position as it is, as shown in FIG. 2, the head-side end portion 10 swings downward in the direction of gravity, and at the same time, the hook 9 rises upward and disengages from the hole 11. Since it is caught by the edge 5a, the moving body 6 does not fall.
[0010]
Next, when the club 30 is lifted from the address to the top, as shown in FIG. 3, the tip of the fulcrum 7 is landed on the A surface of the cylinder 1 as the shaft is reversed, and the head side end 10 is swung in the radial direction to support the fulcrum. 7, the hook 8 comes off from the end edge 5 a and the hook 9 is caught in the hole 11. Accordingly, the axial position of the moving body 6 is hardly changed.
When the downswing is correctly performed from that state, that is, when the grip is pulled down by the left side lead, the head side end portion 10 is lifted by the centrifugal force at the start of the swing as shown in FIG. 4, and the hook 9 is released by the lever action. Thus, the moving body 6 becomes free in the axial direction. Since the subsequent centrifugal force of the swing acts in the axial direction, the moving body 6 moves and collides with the head side stopper 4 to generate an impact sound.
[0011]
On the other hand, when the head is swung from the top state so as to rotate the head around the grip, the centrifugal force is poor and the radial force is large, so the moving body 6 is only pressed against the inner surface of the cylinder 1 and does not move. . Therefore, no impact sound is emitted. Also, even if the shaft trajectory deviates from the correct swing plane, no sound is produced or the sound is low. This is because when the shaft is out of the swing plane, the side surface of the main body 12 is pressed against the B surface or D surface and rubs, so that it does not move or the moving speed becomes slow.
In this way, it is possible to immediately and easily determine whether the swing is good or not based on the presence or absence and the magnitude of the impact sound. And if you make a swing that makes a loud sound, the cock will be stowed and the club head will fall behind, so the head speed in the impact zone will increase and the flight distance will be extended. In addition, since the club head comes down from above, it is easy to catch the ball without hitting it.
[0012]
【The invention's effect】
As described above, according to the present invention, it is possible to immediately and easily determine whether or not the swing is good without requiring an electrical wiring or expensive electronic parts. Further, since the corrector can be incorporated into the shaft of a real golf club, the appearance and performance are the same as those of a real golf club. Therefore, it is possible to practice happily while actually hitting the ball. Therefore, golfers are pleased and contribute to the golf industry.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part showing a golf club in which a correction tool of an embodiment is fixed in a shaft.
FIG. 2 is a cross-sectional view schematically showing an address state of the golf club.
FIG. 3 is a cross-sectional view schematically showing a top state of the golf club.
FIG. 4 is a cross-sectional view schematically showing a downswing state of the golf club.
[Explanation of symbols]
1 cylinder 3, 4 stopper 5, 11 hole 6 moving body 7 fulcrum 8, 9 hook 10 head side end

Claims (2)

When equipped with a square cylinder that can be fixed in the shaft of the golf club, and a movable body that is movable in the axial direction within the cylinder, and when the outer peripheral four surfaces of the cylinder are sequentially A-plane, B-plane, C-plane, and D-plane,
The cylinder has stoppers for stopping the movement of the moving body at both ends, and holes are formed at the same axial position near the grip side stopper on the A surface and the C surface facing the A surface ,
The movable body has a plate-like shape orthogonal to the B-plane and the D-plane, and has a main body that is long in the axial direction and has an obtuse angle with the A-plane as the opposite side at the midpoint, and a fulcrum extending from the midpoint toward the A-plane , The main body has first and second hooks which are formed at the grip side end portions so as to extend toward the A surface and the C surface , respectively, and can be hooked in the holes. And the first hook is in an axial position closer to the head than the second hook ,
The main body swings according to the direction of the fulcrum due to the difference between the gravitational moment on the head side and the gravitational moment on the grip side. When the head side end is in contact with the C surface, it is in contact with the first hook , the A surface. head when stopping the movement of the moving body, the center of gravity in a state where the head-side end portion is in contact with the surface a is subjected to a centrifugal force toward the head side by being caught in the hole where the second hook correspond when side end portion is characterized in that the movable is Rukoto no mobile scratching either the hook by departing the second hook leverage at the same time raised from the surface a, a golf club swing orthotics . A golf club in which the correction device according to claim 1 is fixed in a shaft so that the A-side faces the tip of the head .

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