U.S. patent application number 11/766180 was filed with the patent office on 2008-03-27 for golf swing inspection tool.
Invention is credited to Eijiro Tomomori.
Application Number | 20080076589 11/766180 |
Document ID | / |
Family ID | 36661092 |
Filed Date | 2008-03-27 |
United States Patent
Application |
20080076589 |
Kind Code |
A1 |
Tomomori; Eijiro |
March 27, 2008 |
Golf Swing Inspection Tool
Abstract
There is provided a golf swing inspection tool in which an
effective swing trajectory of a golf club to enable a ball to be
hit farther and more accurately can be naturally and easily
learned, and also in a case where a golf coach teaches a player,
the correct swing trajectory can be pointed objectivity, and the
golf lesson efficiency can be improved. The golf swing inspection
tool is constructed to be capable of checking the swing of the golf
club by the golf player, and includes a reference index member
capable of regulating the correct swing trajectory plane.
Inventors: |
Tomomori; Eijiro; (Tokyo,
JP) |
Correspondence
Address: |
RISSMAN JOBSE HENDRICKS & OLIVERIO, LLP
100 Cambridge Street
Suite 2101
BOSTON
MA
02114
US
|
Family ID: |
36661092 |
Appl. No.: |
11/766180 |
Filed: |
June 21, 2007 |
Current U.S.
Class: |
473/238 ;
473/257 |
Current CPC
Class: |
A63B 69/3621 20200801;
A63B 69/3623 20130101; A63B 2225/093 20130101; A63B 2225/09
20130101 |
Class at
Publication: |
473/238 ;
473/257 |
International
Class: |
A63B 69/36 20060101
A63B069/36 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 2, 2004 |
JP |
2004-350278 |
Claims
1. A golf swing inspection tool to check a swing of a golf club by
a golf player, comprising: a reference index member to regulate an
effective swing trajectory plane of the golf club.
2. The golf swing inspection tool according to claim 1, wherein the
reference index member includes a swing trajectory indication
member to indicate the effective swing trajectory plane of the golf
club, and a club face angle indication member to indicate an
effective angle of a club face at a time of backswing.
3. The golf swing inspection tool according to claim 2, wherein the
swing trajectory indication member regulates an original swing
trajectory plane which includes a position of the golf club set up
in a state where an upper half of a body is bent forward by a
specified angle around a hip joint and has an appropriate angle of
incidence for impact with a ball by the golf club at a time of
swing, and an imaginary swing trajectory plane which includes a
straight line connecting a right shoulder of the player in a case
where the backswing is performed and the golf club has reached a
highest position and the ball and in which a grip at the highest
position at the time of the backswing is to be positioned.
4. The golf swing inspection tool according to claim 3, further
comprising a base to be mounted on an installation surface, and a
supporting part provided on the base to be capable of elongating
and contracting in a vertical direction, wherein the swing
trajectory indication member has an arm shape and is attached to
the supporting part at a variable angle, the club face angle
indication member is attached to the supporting part, and the swing
trajectory indication member is provided to be capable of
elongating and contracting.
5. The golf swing inspection tool according to claim 4, wherein the
supporting part has a rod shape, the swing trajectory indication
member and the club face angle indication member are axially
supported to an upper end of the supporting part, and the swing
trajectory indication member is provided to be elongated straightly
from an axial support part of the supporting part to both sides of
the supporting part, and has a length capable of regulating a cross
section of a swing trajectory of the golf club in a case where it
is elongated to both the sides of the supporting part.
6. The golf swing inspection tool according to claim 5, wherein an
angle display disk having a disk shape is fixed to the upper end of
the supporting part at a center part, and the swing trajectory
indication member and the club face angle indication member are
attached to the indication member through the center part of the
angle display disk.
7. The golf swing inspection tool according to claim 5, wherein
time indicating characters are marked on a peripheral part of the
angle display disk, and the club face angle indication member is
fixed to an angle position of 11:30 at a take-back highest position
when a half swing of the golf club is made.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a golf swing inspection
tool, and particularly to a golf swing inspection tool by which a
golf player can learn a certain and stable swing trajectory to
enable a ball to be hit farther and more accurately.
[0003] 2. Description of the Related Art
[0004] When a golf player hits a ball with a golf club, in order to
hit the ball farther and more accurately, it is necessary that the
forward-bent angle of the upper half of the body is optimally
formed so that the energy of the body can be effectively
transmitted to the ball.
[0005] Besides, in addition to the formation of the form with the
correct forward-bent angle, it is necessary to master a correct
swing trajectory of a golf club, which is effective to hit the ball
farther and more accurately.
[0006] In order to perform the certain and stable swing of the golf
club, which has the correct swing trajectory, it is most important
that in the correct form with the appropriate forward-bent angle of
the upper half of the body, repeated practice of the correct swing
trajectory is done with practice swings of the golf club.
[0007] In the case where the repeated practice is done with the
practice swings of the golf club, in order to grasp the certain and
stable swing trajectory, it is an important element to
appropriately set a distance between the ball and the position
where the feet are placed.
[0008] This is because when the distance between the ball and the
stance of both the feet is accurately set up, as a result, the
position of the grip is also accurately and appropriately set
up.
[0009] Besides, the angle of incidence of the club face at the time
when the club face impacts with the ball, and the position of the
grip of the club in the case where the backswing of the club is
carried out and the club has reached the highest position are also
important elements.
[0010] Accordingly, it is necessary that attention is paid to these
elements and the practice swings of the golf club are done, which
has been confirmed by the inventor of the invention of this patent
application from long achievements as a golf coach.
[0011] By doing repeated practice while paying attention to the
elements as stated above, it becomes possible to perform the swing
of the club with the same swing trajectory.
[0012] From such points of view, in order to form and stabilize the
correct swing trajectory of the golf club at the time of backswing,
it is known from the golf theory that it is important to repeatedly
practice the so-called "half swing" from the height position of the
waist at the backswing side to the height position of the waist at
the follow through side through the setup state where the golf club
is placed at the impact position of the ball in the distance
between the ball and the position where both feet are placed.
[0013] However, hitherto, there is no equipment which can
objectively and visually check whether the correct swing trajectory
is formed in the case where the golf player practices the "half
swing" of the golf club.
[0014] Besides, in order to hit the ball farther and more
accurately, the angle of incidence of the club face at the time of
impact with the ball is also an important element.
[0015] That is, in the case where the club face is too open at the
time of the backswing, at the time of the impact, since the club
face impacts with the ball in the state where it is open relative
to the ball, the ball is hit toward the right direction and the
so-called slice occurs, while in the case where the club face is
too closed, the ball is hit toward the left direction and the
so-called hook occurs.
[0016] Accordingly, in order to hit the ball straight in the
direction intended by the player, it is necessary to perform
repeated practice so that the angle of the club face at the time of
the backswing becomes appropriate.
[0017] However, hitherto, there is no equipment which can visually
and objectively check whether the angle of the club face at the
time of the backswing is appropriately formed.
[0018] Further, in order to hit the ball, in the case where the
golf club is swung up to the height of the shoulder or higher, that
is, the full swing up to the so-called top-of-swing position is
performed, since the height position of the grip is different from
that at the time of the half swing, the swing trajectory is also
different from that at the time of the half swing, and there is no
equipment which can visually and objectively check the correct
swing trajectory at the time of the full swing.
[0019] As a result, hitherto, in the case where a golf coach
coaches a player, since the golf coach must express the correct
swing trajectory by language and body form itself, the expression
becomes very vague, and as a result, it is difficult for the player
to certainly master the correct swing trajectory, and the lesson
efficiency by the coach is very low.
[0020] Hitherto, in patent document 1, a golf swing inspection tool
for golf is open to the public, however, this golf swing inspection
tool is for correcting the fluctuation of the body at the time of
swing, and is not for visually and objectively checking the swing
trajectory to facilitate the learning of the correct swing
trajectory.
[0021] [Patent document 1] JP-A-9-313658
[0022] Besides, hitherto, in patent document 2, a form correcting
equipment is open to the public, however, this form correcting
equipment is for correcting the swing form of a player when viewed
from the front, and this is also not an equipment for facilitating
the learning of the correct swing trajectory of the golf club.
[0023] [Patent document 2] JP-A-2003-230649
SUMMARY OF THE INVENTION
[0024] It is an object of the invention to provide a golf swing
inspection tool in which a correct swing trajectory of a golf club
to enable a ball to be hit farther and more accurately can be
naturally and easily learned, and in a case where a golf coach
teaches a player, the teaching side and the taught side can
scientifically feel bodily, the correct swing trajectory can be
pointed objectivity, and the golf lesson efficiency can be
improved.
[0025] In order to achieve the object, a golf swing inspection tool
according to a first aspect of the invention is a golf swing
inspection tool capable of checking a swing of a golf club 41 by a
golf player, and includes a reference index member capable of
regulating an effective swing trajectory plane of the golf club
41.
[0026] In the golf swing inspection tool of the first aspect of the
invention, since the swing trajectory plane to enable a ball to be
hit farther and more accurately can be objectively regulated, it is
possible to visually check whether a swing is performed in the
swing trajectory plane.
[0027] Accordingly, when practice is repeatedly performed, the
position and angle of the golf club at the time of setup and the
time of swing can be easily checked.
[0028] According to a second aspect of the invention, in the golf
swing inspection tool, the reference index member includes a swing
trajectory indication member capable of indicating the effective
swing trajectory plane of the golf club, and a club face angle
indication member capable of indicating an effective angle of a
club face at the time of backswing.
[0029] As described above, in order to hit the ball farther and
more accurately, it is necessary that at the time of the swing, the
correct swing trajectory of the club to enable the ball to be hit
farther and more accurately can always be formed invariably, and
the angle of incidence of the club face at the time of impact is
set to be orthogonal to the hit-ball direction. In the golf swing
inspection tool of the second aspect of the invention, since the
swing trajectory indication member is provided, the correct swing
trajectory is objectively indicated, and the correct angle of the
club face at the time of backswing, by which the angle becomes
right angles to the hit-ball direction at the time of impact, is
objectively indicated.
[0030] Accordingly, when practice is done with a practice swing, by
swinging the club along the swing trajectory indication member, the
swing trajectory coincident with the correct swing trajectory plane
can be learned. Besides, the correct angle of the club face at the
time of backswing can be learned by the club face angle indication
member.
[0031] Besides, according to a third aspect of the invention, in
the golf swing inspection tool, the swing trajectory indication
member regulates an original swing trajectory plane which includes
a position of the golf club set up in a state where an upper half
of a body is bent forward by a specified angle around a hip joint
and has an appropriate angle of incidence for impact with a ball by
the golf club at the time of swing, and an imaginary swing
trajectory plane which includes a straight line connecting a right
shoulder of the player in a case where backswing is performed and
the golf club has reached the highest position and the ball, and in
which a grip at the highest position at the time of the backswing
is to be positioned.
[0032] Accordingly, in the third aspect of the invention, the
original trajectory plane of the golf club at the time of impact
with the ball can be regulated by the position of the golf club in
the state where the setup is performed in the state where the upper
half of the body is bent forward by the specified angle around the
hip joint. Incidentally, the "specified angle" by which the upper
half of the body is bent forward is 30 degrees to 35 degrees.
[0033] In the case where the "half swing" is practiced, the
repeated practice is performed along the "original swing trajectory
plane" indicated by the swing trajectory indication member, so that
the correct trajectory plane at the time of swing can be learned,
and as a result, the correct swing at the time of full swing and at
the time of impact can be learned.
[0034] Besides, at the time of the "full swing", the correct grip
position at the full swing and at the top of the swing at the time
of the backswing can be learned by the "imaginary swing trajectory
plane" indicated by the swing trajectory indication member.
[0035] In this case, the "imaginary swing trajectory plane" is the
trajectory plane including the straight line formed by connecting
the ball to be placed and the right shoulder of the player, and it
is necessary that at the top of the swing, the grip is on the
"imaginary swing trajectory plane".
[0036] Then, by feeling the "original trajectory plane", at the
time of down swing when the "full swing" is performed, the grip
position is moved from the "imaginary swing trajectory plane" to
the "original trajectory plane", and the golf club is returned to
the position of the golf club in the state of setup, so that it
becomes first possible to form the correct swing trajectory.
[0037] Accordingly, it can be said that the grip position on the
"imaginary swing surface" at the top position at the time of the
full swing is the grip position where it can be returned to the
"original swing trajectory plane" in the case where the down swing
is performed.
[0038] Besides, a golf swing inspection tool according to a fourth
aspect of the invention includes a base to be mounted on an
installation surface, and a supporting part provided on the base
and formed to be capable of elongating and contracting in the
vertical direction, the swing trajectory indication member is
formed into an arm shape and is attached to the supporting part at
a variable angle, the club face angle indication member is attached
to the supporting part, and the swing trajectory indication member
is formed to be capable of elongating and contracting.
[0039] Accordingly, in the golf swing inspection tool of the fourth
aspect of the invention, since the swing trajectory indication
member constituting the club face angle indication member is formed
to be capable of elongating and contracting, the swing trajectory
can be easily confirmed even in the case where the player performs
the full swing.
[0040] Besides, in a golf swing inspection tool according to a
fifth aspect of the invention, the supporting part is formed to be
rod-shaped, the swing trajectory indication member and the club
face angle indication member are axially supported to the upper end
of the supporting part, and the swing trajectory indication member
is formed to be capable of extending straightly from an axial
support part of the supporting part to both sides of the supporting
part, and is formed to have a length capable of regulating the
cross section of the swing trajectory of the golf club in a case
where it is elongated to both the sides of the supporting part.
[0041] Accordingly, in the fifth aspect of the invention, when
being elongated from the supporting part to both direction, the
swing trajectory indication member elongated to both the sides of
the supporting part can regulate the whole trajectory plane of the
golf club.
[0042] Besides, in a golf swing inspection tool according to a
sixth aspect of the invention, an angle display disk formed into a
disk shape is fixed to the upper end of the supporting part at a
center part, and the swing trajectory indication member and the
club face angle indication member are attached to the support
member through the center part of the angle display disk.
[0043] Besides, in a golf swing inspection tool according to a
seventh aspect of the invention, time indicating characters similar
to those of a dial of a clock are marked on a peripheral part of
the angle display disk, and the club face angle indication member
is fixed to an angle position of 11:30 at a take-back highest
position when a half swing of the golf club is made.
[0044] The "half swing" is a swing between a 3:00 position and a
9:00 position in the case where the swing of the golf club 41 is
seen from the front of the body and the swing angle of the golf
club 41 is expressed on the basis of the dial of the clock.
[0045] Accordingly, the "take-back highest position when the half
swing of the golf club is made" corresponds to substantially the
height of the waist of the player.
[0046] In the golf swing inspection tool of the seventh aspect of
the invention, in order to indicate the angle of the scale marked
at the required position of the angle display disk, instead of
numerals indicating angles, the time indicating characters similar
to those of the dial of the clock are used.
[0047] According to the golf swing inspection tool of the first
aspect of the invention, since the swing trajectory plane to enable
the ball to be hit farther and more accurately is regulated by the
reference index member, the player can visually, objectively and
easily check whether the golf club coincides with the effective
swing trajectory plane regulated by the reference index member at
the time of the setup and at the time of the backswing.
[0048] Accordingly, in the case where the angle and position of the
golf club does not coincide with the reference index member,
correction can be instantaneously performed, and the appropriate
swing can be learned by repeated practice.
[0049] As a result, by using the golf swing inspection tool of the
invention, the golf swing to enable the ball to be hit farther and
more accurately can be naturally learned.
[0050] Besides, in the case where a golf coach teaches a player,
the teaching side and the taught side can scientifically feel
bodily, and the golf coach can objectively point the correct swing
trajectory, and accordingly, the golf lesson efficiency can be
improved.
[0051] Besides, in the golf swing inspection tool of the second
aspect of the invention, in addition to the effect of the first
aspect of the invention, the swing trajectory plane of the golf
club to enable the ball to be hit farther and more accurately can
be learned by the swing trajectory indication member, and the
proper angle of incidence of the club face when the club impacts
with the ball can be confirmed by the club face angle indication
member at the time point of the backswing.
[0052] Accordingly, it is possible to effectively prevent the ball
from slicing or hooking after the impact, and the ball can be hit
more accurately and farther toward the direction desired by the
player.
[0053] Besides, in the golf swing inspection tool according to the
third aspect of the invention, at the time of practice of the half
swing as the basis of the golf swing, the correct swing trajectory
can be learned by performing the swing in accordance with the
"original swing trajectory plane", and as a result, the correct
swing trajectory to the impact with the ball at the time of full
swing can be learned.
[0054] Besides, by the "imaginary swing trajectory plane", the grip
position at the time of the "full swing" and at the top position in
the backswing can be learned, and as a result, at the time of the
full swing, when the grip position is set by the "imaginary swing
trajectory plane" and practice is performed, the golf club can be
easily returned to the "original swing trajectory plane" at the
time of down swing, and accordingly, the correct swing can be
learned.
[0055] Besides, in the golf swing inspection tool according to the
fourth aspect and the fifth aspect of the invention, since the
supporting part is formed to be capable of elongating and
contracting in the vertical direction, it can be adjusted according
to the body size of the player, and many players use it and can
learn the correct swing trajectory.
[0056] Besides, the supporting part is elongated or contracted in
the vertical direction, and the height position of the swing
trajectory indication member can be changed, and accordingly, the
"original swing trajectory plane" and the "imaginary swing
trajectory plane" formed at different height positions can be
formed by the swing trajectory indication member, and the player
can be made to clearly recognize both the trajectory plane at the
time of the "half swing" and the trajectory plane at the time of
the "full swing".
[0057] Besides, in the golf swing inspection tool according to the
sixth aspect and the seventh aspect of the invention, since the
time indicating characters similar to those of the dial of the
clock are marked on the peripheral part of the angle display disk,
at the practice, the player can easily grasp the inclined angle of
the club face angle indication member by the image more easily than
the case where characters indicating angles are normally expressed
by numerals indicating angles. As a result, the efficiency of the
swing practice can be made excellent.
[0058] Besides, according to the seventh aspect of the invention,
since the club face angle indication member is fixed to the angle
of 11:30 among the time indicating characters marked on the angle
display disk similar to those of the dial of the clock, the leading
edge of the club head at the time of the half swing is set at the
club face angle indication member, so that the appropriate angle
when the club is swung downward and impacts with the ball can be
formed.
[0059] It is the important element for the impact with the ball by
the club head that the leading edge of the face of the club head is
positioned at the angle position of 11:30 at the half swing
position in the case where the backswing of the golf club is
performed, which has been grasped from the past results of the
inventor of this patent application as a golf coach.
[0060] Accordingly, in the invention, the optimum angle of
incidence when the golf club impacts with ball can be learned by
merely causing the leading edge of the club head of the golf club
to coincide with the club face angle indication member at the
height position of the waist in the half swing.
[0061] Accordingly, the position of the grip at the top point of
the backswing is learned by the "imaginary swing trajectory plane",
the angle of the club face at the height position of the waist at
the time of the down swing is learned by the regulation of the golf
club face angle indication member, and the angle position of the
golf club at the time of the impact can be learned by the "original
swing trajectory plane", and accordingly, the player repeatedly
practice these elements, and can easily master the swing trajectory
to enable the ball to be hit farther and more accurately.
[0062] Besides, also in the case where the golf swing is taught,
since all the elements required for the correct swing are
objectified by the "swing trajectory indication member" and the
"club face angle support member", teaching can be easily performed
to the player, and the lesson efficiency can be improved.
BRIEF DESCRIPTION OF THE DRAWINGS
[0063] FIG. 1 is a perspective view showing an embodiment of a golf
swing inspection tool of the invention.
[0064] FIG. 2 is a plan view showing the embodiment of the golf
swing inspection tool of the invention.
[0065] FIG. 3 is a side view showing the embodiment of the golf
swing inspection tool of the invention and a case where an original
plane is regulated in a state at the time of setup.
[0066] FIG. 4 is a side view showing the embodiment of the golf
swing inspection tool of the invention and showing a state where a
half swing is performed on the regulated original plane and a club
face is set at an angle position of 11:30.
[0067] FIG. 5 is a side view showing the embodiment of the golf
swing inspection tool of the invention and showing a state in which
a swing plane is formed and the top of the swing at the time of
backswing on the swing plane is reached.
DETAILED DESCRIPTION OF THE INVENTION
[0068] Hereinafter, an embodiment of the invention will be
described with reference to the accompanying drawings.
[0069] As shown in FIG. 1 to FIG. 5, a golf swing inspection tool
11 of this embodiment is constructed to be capable of checking the
swing of a golf club 41 by a player 45, and includes a reference
index member 12 capable of regulating an effective swing trajectory
plane.
[0070] As shown in FIG. 1, the reference index member 12 includes a
swing trajectory indication member 13 capable of indicating the
effective swing trajectory plane of the golf club 41, and a club
face angle indication member 14 capable of indicating the effective
angle of a club face at the time of backswing.
[0071] As shown in FIG. 3 and FIG. 4, the swing trajectory
indication member 13 is constructed to be capable of regulating an
original swing trajectory plane 28 including a position of a club
shaft 29 of the golf club 41 when the player 45 sets up in a state
where the upper half of the body is bent forward by 30 degrees to
35 degrees around the hip joint, and an imaginary swing trajectory
plane 33 as shown in FIG. 5, which includes a straight line
connecting a right shoulder 47 of the player 45 in the case where
backswing is performed and the golf club 41 has reached the highest
position and a position 46 where a ball is to be placed, and on
which a grip 27 at the highest position at the time of the
backswing is to be positioned.
[0072] The golf swing inspection tool 11 of this embodiment
includes a base 15 to be mounted on an installation surface 42, a
supporting part 16 provided on the base 15 and formed to be capable
of elongating and contracting in the vertical direction, a swing
trajectory indication member 13 fixed to the supporting part 16 at
a variable angle and capable of indicating the first swing
trajectory plane 28 and the second swing trajectory plane 33, and a
club face angle indication member 14 fixed to the supporting part
16, and the swing trajectory indication member 13 is formed to be
capable of elongating and contracting.
[0073] The supporting part 16 is formed to be rod-shaped, the swing
trajectory indication member 13 is axially supported and fixed to
the upper end of the supporting part 16, and the club face angle
indication member 14 is axially supported to the same part. The
swing trajectory indication member 13 is formed to be capable of
being elongated from the supporting part 16 to both directions
while an axial support part 44 of the supporting part 16 is made an
intermediate part.
[0074] Besides, the swing trajectory indication member 13 is formed
to have such a length size that it can indicate the swing
trajectory plane also in the full swing of the golf club 41 in the
case where it is elongated to both the sides of the supporting part
16.
[0075] A disk-like angle display disk 17 is mounted on the upper
end of the supporting part 16, and the intermediate part of the
swing trajectory indication member 13 and the base end of the club
face angle indication member 14 are rotatably attached to the
center part of the angle display disk 17.
[0076] A scale is marked on the angle display disk 17, the scale is
marked with time indicating characters, and the club face angle
indication member 14 is fixed to the angle position of 11:30.
[0077] Hereinafter, an embodiment of the golf swing inspection tool
11 of the invention will be described.
[0078] As shown in FIG. 1 and FIG. 2, the golf swing inspection
tool 11 includes the base 15, the support member 16 vertically
provided on the base 15, the angle display disk 17 mounted on the
upper end of the support member 16, and the reference index member
12 rotatably attached to the angle display disk 17.
[0079] In this embodiment, as shown in FIG. 1, the reference index
member 12 includes the swing trajectory indication member 13 and
the club face angle indication member 14.
[0080] As shown in FIG. 1, the base 15 has a plane disk shape, and
has such a size and weight that it can be stably mounted on the
installation surface 42, such as the floor or ground, even in the
case where the swing trajectory indication member 13 is elongated
to both sides of the support member 16 as described later, and in
this embodiment, it is formed of metal.
[0081] The whole support member 16 is formed into a metal rod
shape, and includes, as shown in FIG. 1, a large diameter part 21
orthogonally fixed to the base 15 at the base end and a small
diameter part 20.
[0082] As a result, in the case where the golf swing inspection
tool 11 of this embodiment is mounted on the installation surface
42, the support member 16 is substantially vertically provided. The
small diameter part 20 can be inserted into the inside of the large
diameter part 21 and is formed to be capable of protruding, and as
shown in FIG. 1, a fixing screw 22 for height adjustment is
provided at the upper end of the large diameter part.
[0083] Accordingly, in the case where the height of the support
member 16 is adjusted, the fixing of the small diameter part 20 to
the large diameter part 21 by the fixing screw 22 is released and
the height is adjusted, and at a suitable height, the small
diameter part 20 is fixed to the large diameter part 21 by the
fixing screw 22.
[0084] In this embodiment, the support member 16 is formed to have
such a length size that the axial support part 44 can be disposed
at the height position of the waist of the player 45 by extending
the small diameter part 20 and fixing it at the suitable height by
the fixing screw 22.
[0085] Accordingly, since the support member 16 is formed to be
capable of elongating and contracting in the vertical direction and
to be height adjustable, each player can use it according to
his/her own physical size.
[0086] The angle display disk 17 is fixed to the upper end of the
support member 16 through the axial support part 44. The angle
display disk 17 has a side disk shape, and is made of vinyl
chloride and is formed to be transparent as shown in FIG. 1, and a
scale 18 indicating required angles is marked along the peripheral
part.
[0087] Besides, as shown in FIG. 1 and FIG. 5, time indicating
characters 19 similar to those on the dial of a clock are marked at
required positions of the scale 18 marked on the angle display disk
17.
[0088] As shown in FIG. 1, the swing trajectory indication member
13 as the reference index member 12 is formed to have a linear rod
shape by coupling three pipe members having specified length sizes
and different from each other in diameter along the length
direction, the respective pipe members are formed to be capable of
being inserted into or protruding from the adjacent pipe member,
and the whole is constructed to be elongating and contracting in
the length direction.
[0089] The swing trajectory indication member 13 is constructed
such that as shown in FIG. 2, the intermediate part in the axial
direction is attached to the upper end of the support member 16 and
to the center part of the angle display disk 17 so as to be
rotatable in the clockwise direction and the counter-clockwise
direction through the axial support part 44, and can be stopped and
fixed at an arbitrary angle by tightening a wing screw 23.
[0090] The swing trajectory indication member 13 can regulate the
swing trajectory plane at the time of the swing of the golf club 41
along the swing forward-backward direction from the side surface
side.
[0091] As shown in FIG. 1 and FIG. 2, the club face angle
indication member 14 as the reference index member 12 is arranged
like a needle of a clock on the angle display disk 17, and its base
end is rotatably attached to the upper end of the support member 16
and the center part of the angle display disk 17 by a knurled screw
24 and by the axial support part 44.
[0092] The club face angle indication member 14 is formed to be
stopped and fixed at an arbitrary inclined angle by tightening the
knurled screw 24.
[0093] The club face angle indication member 14 is provided to
enable the player 45 to confirm whether the club face 26 of the
golf club 41 has an appropriate angle at the time of backswing.
[0094] The operation of the golf swing inspection tool 11 of this
embodiment, that is, the use method will be described.
[0095] First, as shown in FIG. 3, the golf swing inspection tool 11
is installed at the left of the player 45 when viewed from the
front direction of the player 45, that is, at the side where the
backswing of the golf club 41 is performed. In more detail, when
viewed from the backswing side, it is installed at substantially
the center position between a position of both feet of the player
45 and a position 46 where a ball is to be placed.
[0096] At the time of setup, as shown in FIG. 3, the player 45
bends the upper half of the body forward by 30 to 35 degrees around
the hip joint, grips and holds the golf club 41 with both hands in
the most natural state based on his/her own body size, and takes
the setup posture in which the club head 25 is put on the floor
surface or the ground in the state where the right elbow is
slightly lowered.
[0097] When the grip of the club is held, the grip end side is held
with the left hand, and the anti-grip end side is held with the
right hand, and accordingly, the right hand is extended and the
right elbow is positioned lower than the left elbow. Accordingly,
there naturally occurs the state where the right elbow is slightly
lowered.
[0098] As described above, the forward-bent angle of 30 to 35
degrees is an angle at which body energy stored by twist of the
upper half of the body at the time of backswing can be most
effectively transmitted to the golf club 41.
[0099] At this time, when viewed from the side of the backswing
side, the grip 27 is set at the waist, more accurately,
substantially the same height position as the hip joint. In this
state, it is necessary to place the club head 25 at a position
where the most natural setup state can be taken.
[0100] Incidentally, in this state, it is desirable that the grip
end of the golf club is located at an angle position where it
points to the navel of the player 45.
[0101] Originally, the position where the club head 25 is placed in
this state is the position 46 where the ball is to be placed.
[0102] Accordingly, the position 46 where the ball is to be placed
is resultantly determined after the form is formed, and the
position 46 where the ball is to be placed is finely adjusted as
the need arises in relation to the form having the forward-bent
posture of the player 45. Besides, adjustment is made according to
the length size of the golf club 41 used.
[0103] Next, in the case where the setup is correctly performed,
first, the player takes a stance while both the feet are parallel
to each other, confronts the position 46 where the ball is to be
placed, puts the club head 25 at the position 46 where the ball is
to be placed, and stands so that the body becomes normal to the
held golf club 41.
[0104] Further, the upper half of the body is bent forward by 30
degrees to 35 degrees around the hip joint, the knee is naturally
slightly bent, the right elbow is naturally lowered, the grip 27 is
held, and the golf club 41 is set, so that the correct posture in
the case of impact with the ball, and the basis of the optimum
swing form can be formed.
[0105] That is, the state position of the golf club 41 at the time
of the setup is the state position where the ball can be hit toward
an accurate direction and with a large and accurate flying distance
when the golf club 41 impacts with the ball after the backswing and
the downswing are performed.
[0106] Accordingly, in the swing of the golf club 41, in order to
hit the ball farther and more accurately, it is an absolutely
necessary condition that after the backswing is performed, the golf
club 41 is again returned to this state position correctly.
[0107] As a result, in the case where a ball is actually hit in a
golf course, a golf practice field or the like, first of all, it is
necessary to address the ball at the position where the approach
with the above form can be performed.
[0108] In this case, as shown in FIG. 3, in the state where the
setup is completed, in the swing direction of the golf club 41, the
original swing trajectory plane, that is, the "original plane" 28
is formed in the swing direction including the club shaft 29 in the
setup state, which is the basis of the swing of the golf club
41.
[0109] This "original plane" 28 is the plane including the position
of the club head 25 where the golf club 41 can finally
appropriately hit the ball after the backswing of the golf club 41
is performed.
[0110] Accordingly, in order to form the correct trajectory of the
golf club 41 at the time of the swing, first, the address state
including the inclined angle of the upper half of the body is
accurately formed, and it is necessary that in that state, the
player 45 sufficiently recognizes the "original plane" 28 formed at
the time of the swing of the golf club 41.
[0111] A series of preparation operations at the time of setup,
including the determination of the standing position, the forward
bending of the upper half of the body, holding the grip, and
setting the club head at the ball position are generally called
"routine" in the world of golf. When this "routine" is correctly
performed, the basic state in which the certain and stable swing
can be performed is naturally formed.
[0112] Accordingly, in this embodiment, first, this "original
plane" 28 is objectively defined using the swing trajectory
indication member 13.
[0113] That is, first, the height of the supporting part 16 of the
golf swing inspection tool 11 of this embodiment is adjusted
according to the body size of the player 45, the center part of the
angle display plate 17, that is, the axial support part 44 is set
at the height position of the grip 27 when viewed from the
backswing side, and the swing trajectory indication member 13 is
suitably inclined by operating the wing screw 23 and is elongated
in both directions of the support member 16, so that the swing
trajectory indication member 13 is set to be disposed in a straight
line along the club shaft 29 which is set up.
[0114] Incidentally, the angle adjustment of the swing trajectory
indication member 13 may be performed by another person such as a
coach, or the player 45 may perform it while making confirmation by
a mirror.
[0115] By this, by the swing trajectory indication member 13, the
"original plane" 28 as the original swing trajectory plane for the
impact of the ball by the golf club 41 is visualized and
objectified, and the player can objectively recognize the formation
state of the "original plane" 28 by the mirror or the like.
[0116] Accordingly, at the setup, when repeated practice is done so
that the inclination angle of the club shaft 29 always coincides
with the inclined angle of the swing trajectory indication member
13, the correct setup posture can be mastered.
[0117] By this, the optimum setup becomes possible, and the basis
of execution of the correct swing can be formed.
[0118] Next, in order to form a certain and stable swing
trajectory, at the time of backswing, it is most important to
practice the so-called "half swing" from the height position of the
waist at the backswing side to the height position of the waist at
the follow through side, which is recognized in a swing theory in
golf.
[0119] This is obvious from the fact that professional golfers
often perform the half swing before actually hitting the ball in
order to confirm the image of hitting the ball and the swing on a
tournament course.
[0120] In order to perform the half swing correctly, the swing is
repeatedly performed in the "original plane" 28 and between the
height position of the right waist at the time of the backswing and
the height position of the left waist at the time of the through
impact, so that the correct trajectory plane of the golf club 41
from the backswing to the impact and to the through impact can be
grasped.
[0121] In this case, as shown in FIG. 4, at the time of the
backswing in the half swing, when the angle of a leading edge 30 of
the club face 26 of the club head 25 becomes the angle of 11:30,
the club head 25 comes in contact with the ball at a correct angle,
and it becomes possible to hit the ball toward the aimed
direction.
[0122] That is, in this embodiment, when the half swing is
practiced, at the time of the backswing, the swing is performed so
that when the club head 25 is positioned at the height of the
waist, the leading edge 30 of the club face 26 of the club head 25
coincides with the club face angle indication member 14 which is
set at the position of 11:30.
[0123] Between the time of the backswing of the golf club 41 and
the time of the impact, the upper half of the body, the arm and the
club perform the rotation movement in which the center line of the
body from the head to the foot is the rotation axis.
[0124] As a result, since the club face 26 of the club head 25 also
goes down while rotating around the club shaft 29 from the time of
the backswing to the time of the impact, the leading edge 30 of the
club face 26 is made to coincide with the angle position of 11:30
at the top position of the backswing in the half swing, so that the
correct angle of the club face when the face 26 of the club head 25
impacts with the ball can be formed at this position, and while
this state is kept, the club is swung downward to the initial
position positioned on the "original plane" 28 formed at the time
of setup and impacts with the ball, so that the correct club face
perpendicular to the hit-ball direction can be formed.
[0125] As stated above, by forming the club face 26 perpendicular
to the hit-ball direction at the time of the impact, the ball can
be hit "straight" toward the forward direction of both feet.
[0126] As stated above, in the case where the angle of the leading
edge 30 of the club face 26 is smaller than 11:30, for example, in
the case where the impact is performed at the angle of about 10:00,
the club face 26 is in the "closed" state, and in the case where
the impact is made in this state, the ball is curved toward the
left direction in the hit-ball direction, and the "hook"
occurs.
[0127] On the other hand, in the case where the angle is larger
than 11:30, for example, in the case of about 12:30, the club face
26 is in the "open" state, the ball is curved rightward in the
hit-ball direction, and the "slice" occurs, which is logically
grasped.
[0128] Accordingly, by setting the leading edge 30 of the club face
26 at the angle indication needle 14, the face plane coming in
contact with the ball at right angles to the hit-ball direction can
be recognized and set at this position, and accordingly, through
another person or by seeing a mirror, the player can confirm
whether the angle of the leading edge 30 of the club head 25 in the
backswing is the correct angle.
[0129] As a result, the player can objectively recognize the club
face 30 capable of forming the correct hit-ball direction at the
time of the backswing in the half swing, and can easily perform
correction.
[0130] As stated above, the "half swing" lies at the heart of the
golf swing, and since the practice of the half swing is most
important, it is necessary to repeatedly perform the practice in
slow motion so that the swing can be performed with the correct
trajectory.
[0131] In this case, it is important to perform the half swing in
the state where both elbows point downward. That is, the half swing
is performed so that the right elbow points downward at the time of
the take-back, and the left elbow points downward at the time of
the through impact.
[0132] Incidentally, in the case where the swing of the golf club
41 is viewed from the body front direction and the swing angle of
the golf club 41 is expressed on the basis of the dial of a clock,
the "half swing" is the swing between the 3:00 position to the 9:00
position.
[0133] After the practice of the half swing as stated above, it is
important to perform the stepwise practice such that the speed of
the swing of the golf club 41 is gradually increased, the swing
between the 2:00 position to the 10:00 position, that is, the
so-called "three quarter" swing is practiced, and finally, the
formation of the "full swing" between the angle position of about
11:30 at the top and the angle position of about 11:30 at the time
of finish is targeted.
[0134] In this case, the "half swing" is the most basic and
important swing to catch the ball, and the "three quarter" is the
swing to get a carry of 100 yards to 150 yards and to advance the
game while the point is certainly acquired. The "full swing" is the
swing for finally hitting the ball farthest and more
accurately.
[0135] Accordingly, the "full swing" is a series of operations
formed by the rising of the grip position toward the right shoulder
direction at the time of the take-back of the "half swing", and the
"full swing" and the "half swing" are not separate from each other,
but the "full swing" is on an extension of the "half swing".
[0136] In the case where the ball is actually hit by the golf club
41, the full swing is performed, and when the swing trajectory
plane in the case of the highest position of the backswing at the
time of the full swing is confirmed, as shown in FIG. 5, the fixing
screw 22 of the indication member 16 is adjusted to pull out the
small diameter part 20 upward from the large diameter part 21, and
the axial support part 44 forming the center part of the angle
display disk 17 is set at the height position of the waist of the
player 45.
[0137] Then, as shown in FIG. 5, a lower end 13a of the swing
trajectory indication member 13 is fixed in a state where it points
the position 46 where the ball is to be placed, and an inclination
angle is set so that an upper end 13b intersects the right shoulder
position 47 of the player 45. As a result, the "swing plane" 33 is
formed by the swing trajectory indication member 13.
[0138] This "swing plane" 33 is an imaginary swing trajectory plane
which includes a straight line connecting the right shoulder 47 of
the player 45 in the case where the golf club 41 has reached the
highest position after the backswing, that is, at the top and the
position 46 where the ball is to be placed, and in which the grip
27 at the highest position at the time of the backswing is to be
positioned.
[0139] Accordingly, it is the most important condition at the time
of the backswing that at the top, the grip 27 of the golf club 41
is positioned in the "swing plane" 33.
[0140] Then, from this at the top point, the down swing is
performed while the body goes ahead of the golf club 41 and is
rotated. Besides, in the case of the down swing, it is effective
that at the top of the swing position, the moment of inertia is
once released downward, and the grip 27 takes a trajectory close to
the body.
[0141] In more detail, at the time of the down swing, it is
important that until the impact with the ball by the golf club 41,
the rotation of the waist goes ahead of the downward swing of the
golf club 41, and at the time of the impact, the femoral region of
the left leg and the left knee are not rotated to the outside of
the body but are fixed, the state where they are directed to the
front is kept, and the club head 25 is made to pass though the
front of the body instantaneously from the impact to the
follow-through.
[0142] As stated above, the femoral region and the knee of the left
leg are not rotated with the rotation of the upper half of the body
but are fixed, so that the centrifugal force and centripetal force
generated by the twist of the upper half of the body are not
relieved but can be transmitted to the club head 25 of the golf
club 41.
[0143] Thereafter, it is necessary that the golf club 41 is again
returned to the trajectory position of the "original plane" 28
where the golf club 41 can impact with the ball in the most natural
state for the player 45 originally, and the impact with the ball is
performed.
[0144] Accordingly, by using the golf swing inspection tool 11 of
this embodiment, the half swing in the "original plane" 28 is
repeatedly practiced, and the repeated practice is performed so
that the angle of 11:30 can always be kept by setting the leading
edge 30 of the club head 25 at the club face angle indication
member 14 at the top-of-swing position of the half swing, and
further, at the time of the full swing, while reference is made to
the "swing plane" 33, the down swing of the golf club 41 is
performed in accordance with the "original plane" 28, so that the
swing to enable the ball to be hit farther and more accurately can
be learned.
[0145] Accordingly, in the case where the practice of the golf
swing is performed using the golf swing inspection tool 11 of the
embodiment, it is learned by the "swing plane" 33 that the position
of the grip 27 at the top point of the backswing is set at the
position of the right shoulder, the angle of 11:30 of the club face
26 at the height position of the waist at the time of the down
swing is learned by the regulation of the club face angle
indication member 14, and the angle position of the golf club 41 at
the impact can be learned by the "original plane" 28.
[0146] Accordingly, since the three points of the correct swing are
clearly and objectively indicated by the swing trajectory
indication member 13 and the club face angle indication member 14
in the form where determination can be visually made, the player 45
repeatedly practices the swing trajectory including the three
points, and can easily learn the swing trajectory to enable the
ball to be hit farther and more accurately.
[0147] Incidentally, the specific structure of the reference index
member 12 and the swing trajectory indication member 13 are not
limited to the above embodiment.
[0148] The invention can be applied to an equipment to check a form
in a case where a golf player performs a practice to stabilize a
swing trajectory.
* * * * *