Games using tangible projectile – Golf – Practice projectile addressing surface
Reexamination Certificate
1999-08-17
2001-01-30
Wong, Steven (Department: 3711)
Games using tangible projectile
Golf
Practice projectile addressing surface
Reexamination Certificate
active
06179724
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a device for changing an inclination angle of a golf ball swing table, and more particularly, the present invention relates to a device for changing an inclination angle of a golf ball swing table, which allows a golfer to stably perform swing practice even in a narrow indoor space in the same ground conditions as in the outdoor field and provides at one side front portion of the golf ball swing table an angle adjusting section capable of being manipulated by using a golf club or by a golfer's foot thereby to enable the golfer to easily change an inclination angle of the golf ball swing table while being on the golf ball swing table.
2. Description of the Related Art
Recently, in playing golf, which gradually occupies its position as a leisure sport, a wide space must be utilized, and a great deal of practice is needed to satisfactorily play golf at various outdoor conditions. Such practice is frequently performed in an indoor golf practice range.
In the swing practice which is performed at an indoor golf practice range, a golfer drives a golf ball on a golf ball swing table to develop a correct swing posture.
However, in actually playing golf in an outdoor field, because the ground is inclined in leftward, rightward, forward or backward directions depending upon field conditions, a difference is generated when compared to the swing practice which is performed in an indoor practice range, and thereby it is difficult to smoothly play golf at the outdoor field, due to inadequate realistic practice.
To cope with this problem, a device for dimensionlessly changing an inclination angle of a golf ball swing table is disclosed in the art, as described in the Korean Patent Publication No. 97-4365, a construction of which will be described hereinafter with reference to FIG.
11
.
FIG. 11
is a schematic constructional view illustrating a device for dimensionlessly changing an inclination angle of a golf ball swing table of the conventional art. The device of the conventional art includes a power transmitting section, a rotating section, an inclination angle changing section and a braking support section.
In the power transmitting section, a driving motor
102
is installed to a one side lower portion of a body part
101
of the device
100
. The driving motor
102
is installed such that it is connected to a reduction gear by a belt. A reduced rotation part
103
is installed beside the reduction gear. The power transmitting section rotates a driving shaft
104
and a disk
105
which are vertically uprighted on the reduced rotation part
103
.
In the rotating section, the disk
105
is installed to a lower surface of the driving shaft
104
which is rotatably driven while being vertically uprighted on the reduced rotation part
103
. The driving shaft
104
which is disposed on the disk
105
, is eccentrically installed. One end of the guide bar
106
is horizontally coupled to a middle portion of the driving shaft
104
, and one end of a coupling piece
107
is horizontally coupled to the other end of the guide bar
106
by a coupling bolt. A first wheel
109
to which a chain
108
is wound is rotatably installed to an upper end of the driving shaft
104
.
In the inclination angle changing section, as described above, one end of the guide bar
106
is horizontally coupled to the middle portion of the driving shaft
104
, and one end of the coupling piece
107
is horizontally coupled to the other end of the guide bar
106
by the coupling bolt. In addition, a pot-shaped coupling part
201
which is provided at a lower part of a vertically uprighted rotating shaft
200
, is connected with the other end of the coupling piece
107
. Above the pot-shaped coupling part
201
, a second wheel
202
is rotatably installed to the rotating shaft
200
such that the second wheel
202
is connected to the first wheel
109
via the chain
108
. A foot plate support part
203
is installed at an upper part of the rotating shaft
200
to support a circular foot plate
204
and to change an inclination angle of the foot plate
204
.
In the braking support section, a jar-shaped rotating member
205
is integrally fitted around a circumferential outer surface of the foot plate support part
203
which supports the foot plate
204
. An engaging member
206
is detachably installed around a circumferential outer surface of the jar-shaped rotating member
205
. A rotating member engaging part
207
into which the engaging member
206
is fitted, is installed on an upper end of the body part
101
, to securely support the foot plate
204
which is inclined at a certain angle by the inclination angle changing section.
In operations of the device for dimensionlessly changing an inclination angle of a golf ball swing table of the conventional art, constructed as mentioned above, as the driving motor
102
of the power transmitting section is driven, the driving shaft
104
of the reduced rotation section is rotated by power transmitting means such as the reduction gear which is interlocked with the belt, or the like.
Accordingly, as the disk
105
which is eccentrically installed on the driving shaft
104
which is rotated by the power transmitting section, is eccentrically rotated, the guide bar
106
which is coupled to the coupling piece
107
is moved in a horizontal direction.
On the other hand, due to the fact that the first wheel
109
of the driving shaft
104
is connected by the chain
108
to the second, wheel
202
of the rotating shaft
200
which is connected to the guide bar
106
via the coupling piece
107
, rotating force of the driving shaft
104
is transmitted to the rotating shaft
200
which is disposed below the foot plate
204
to be integrally and slowly rotated.
At this time, since the guide bar
106
which is coupled to the lower part of the rotating shaft
200
through the coupling piece
107
, is pulled leftward or rightward by the eccentric rotation of the driving shaft
104
which is disposed on the disk
105
, the rotating shaft
200
is slightly inclined from a vertically uprighted position by an angle, thereby to be changed in its inclination angle.
Accordingly, by the change in angle of the rotating shaft
200
, the foot plate support part
203
and the foot plate
204
which are arranged on the rotating shaft
200
are changed in their angle, and one sides thereof are maintained in a downwardly inclined state.
On the other hand, in order to securely maintain the foot plate
204
which is inclined downward as described above, as the jar-shaped rotating member
205
which is fitted around the foot plate support part
203
is smoothly rotated in the engaging member
206
of the rotating member engaging part
207
, the jar-shaped rotating member
205
is secured by an electronic clutch which is constructed by the fact that a coil is wound around the engaging member
206
, the electronic clutch serving as braking means for the jar-shaped rotating member
205
which is integrally formed with the foot plate support part
203
.
The foot plate
204
which is completed in its change of an inclination angle, is secured by turning off a driving switch (not shown), and in this state, it is possible to stably perform swing practice even in a narrow indoor space in the same ground conditions as in the outdoor field.
However, the device for dimensionlessly changing an inclination angle of a golf ball swing table of the conventional art, constructed as mentioned above, suffers from defects in that since an inclination angle of the circular foot plate
204
is adjusted by the inclination angle adjusting section which is installed in a longitudinal direction, when the foot plate
204
is not vertically positioned, supporting force of the entire device is remarkably decreased, thereby to be deteriorated in its stability.
Moreover, since components constituting the device have complicated structures, failure occurs frequently.
In addition, in the case that it is necessary to change an inclination ang
Jung Sung-Ho
Yang Hong Jun
Jacobson Price Holman & Stern PLLC
Wong Steven
LandOfFree
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