Structure for tennis practice frame

Abstract

Disclosure of the present invention relates to an inverse “L” shaped tennis practice stand or device, which is installed on ground and is considerably higher than a person's height or to a wall-mountable tennis practice device, which is installed via bracket installed at a certain point at a house or building structure. In the tennis practice device according to the present invention, when a trainee hits the ball with a racket (racquet), the ball flies along a circumferential orbit/trajectory with weight or stopper, which is at an end of a horizontal pole, as the center point—that is the ball flies in the skyward direction in front (forward region) of the trainee and then returns to the same circumferential orbit/curve due to gravity, and the trainee practices tennis by repeatedly hitting the ball that falls in front of the trainee.

1 . A tennis practice device, comprising:
 a frame, comprising
 a lower base, firmly fixed to a ground concrete structure as a foundation; 
 a central support, extending in a skyward direction from the lower base; and 
 a horizontal support, bent or curved near an upper end of the central support and extending horizontally; 
   a controller, installed on the frame for controlling an operation of a roller;   a front-end connection cord, extending from the roller to a first connector of a weight;   a rear-end connection cord, with one end connected to a second connector of the weight; and   a ball, connected to another end of the rear-end connection cord and suspended there below;   
       wherein
 the weight is disposed just below a guide ring at an end of the horizontal support, the end of the horizontal support away from the central support; and 
 the weight maintains a tension of the front-end connection cord string, and 
 when the front-end connection cord is pulled, the weight moves along a length of the horizontal support. 
 
     
     
         2 . The tennis practice device according to  claim 1 , wherein
 the tennis practice device comprises the horizontal support, formed in plurality at a set distance or interval, and each horizontal support comprises the controller.   
     
     
         3 . The tennis practice device according to  claim 1 , wherein
 a cross-sectional thickness of the horizontal support decreases and narrows along the length of the horizontal support.   
     
     
         4 . The tennis practice device according to  claim 1 , wherein,
 the rear-end connection cord is more flexible and lightweight than the front-end connection cord.   
     
     
         5 . The tennis practice device according to  claim 1 , wherein
 the first connector of the weight is located on a vertically upper portion of the weight,   the second connector of the weight is located on a vertically lower portion of the weight, and   the connectors are hook or ring type for connecting the cords.   
     
     
         6 . The tennis practice device according to  claim 1 , wherein
 the ball comprises:
 a snag bar having a middle waist portion formed with a hook cord for attaching the snag bar to the rear-end connection cord; 
   wherein the snag bar is inserted into an inside ( 223 ) of the ball through a small hole penetrating into the inside of the ball at a first point on an outer circumference of the ball, with the hook cord remaining outside the small hole and outside of the ball, and the snag bar inserted is caught from the inside of the ball on an inner circumferential surface of a core of the ball, to thereby prevent the ball from being separated from the hook cord attached to the rear-end connection cord.   
     
     
         7 . A tennis practice device, comprising:
 a vertical pole, extending in a vertical direction with a base end of the vertical pole affixed to a ground or ground structure;   a horizontal pole, extending in a horizontal direction with one end joined at an upper end of the vertical pole;   an upper front-end connection, connected from a controller for operating the upper front-end connection cord to a stopper;   a lower front-end connection cord, connected from the stopper to a controller for operating the lower front-end connection cord attached to the vertical pole;   the stopper, disposed below a guide ring at another end of the horizontal pole and configured to be a dividing point for the upper and lower front-end connection cords and a connection point for a rear-end connection cord;   the rear-end connection cord, connected to the stopper at one end;   a ball hanging close to the ground from the rear-end connection cord at another end, whereby a user practices tennis strokes by repeatedly striking the ball with a racket; and   an auxiliary cord, preventing the ball from getting tangled in the lower front-end connection cord during the user practices tennis strokes;   
       wherein:
 when the upper front-end connection cord is pulled by winding the upper front-end connection cord controller, the stopper does not allow the lower front-end connection cord to pass through the guide ring at the end of the horizontal pole; and 
 when the auxiliary cord is connected to a particular set point of the lower front-end connection cord and is pulled, the lower front-end connection cord passes a bent or curved point between the vertical and horizontal poles and is directed toward the controller for operating the lower front-end connection cord, along an outer circumferential surface of vertical pole, so that the lower front-end connection cord is formed in an overall “L” shape to prevent the ball from getting tangled in the lower front-end connection cord while the user practices tennis strokes. 
 
     
     
         8 . The tennis practice device according to  claim 7 , wherein
 the vertical and horizontal poles are pipe-type, metallic structures.   
     
     
         9 . The tennis practice device according to  claim 7 , wherein the controllers are installed on the vertical pole. 
     
     
         10 . The tennis practice device according to  claim 7 , further comprising:
 a guide ring to allow the auxiliary cord to pass through at the bent or curved point,   wherein, after one end of the auxiliary cord is connected to the controller operating the auxiliary cord, and the other end of the auxiliary cord passes through a guide ring, which is installed in a vicinity of the bent or curved point between the vertical and horizontal poles, and reaches the bent or curved point from a point where the lower front-end connection cord is in close contact with the guide ring at the end of the horizontal pole, and the other end of the auxiliary cord is connected to the particular set point,   when the controller operating the auxiliary cord is wound, the particular set point is pulled toward the guide ring at the bent or curved point, so that the lower front-end connection cord is formed in the overall “L” shape.   
     
     
         11 . A tennis practice device, comprising:
 a support frame comprising:
 a vertical support unit, having at least one bracket, and is affixed to a wall surface of a house or building; 
 a horizontal support unit for mounting the horizontal pole in a horizontal direction; and 
 a reinforcing support unit for reinforcing bearing capacity of the horizontal support unit by being attached to the vertical and horizontal supports in a diagonal direction thereof; 
   a controller, installed on the frame for controlling an operation of a roller;   a front-end connection cord, extending from the roller to a weight hanging from a rear-end connection cord;   a rear-end connection cord, with one end connected to the weight; and   a ball, connected to another end of the rear-end connection cord and suspended there below;   
       wherein
 the weight is disposed just below a guide ring at an end of the horizontal pole, the end of the horizontal pole away from the wall surface; and 
 the weight maintains a tension of the front-end connection cord string, and 
 when the front-end connection cord is pulled, the weight moves along a length of the horizontal pole. 
 
     
     
         12 . The tennis practice device, according to  claim 11 , wherein
 the front-end connection cord is made of material having more structural integrity and durability for prolong use, and   the rear-end connection cord is made of material having more flexibility and lightweight than the front-end connection cord for ease of use and replacement.