Golf swing plane correction device

Abstract

A golf swing plane correction device is set up rearwardly of a ball impact direction to correspond to a ball position and includes a bottom board. The bottom board are rotatably coupled, at the top side thereof, with two backswing and downswing plane angle adjustment bars through a resistance-adjustable shaft seat. The angle adjustment bars each have an operation end that is jointed to a bar extending therefrom to form optimum backswing and downswing plane angle. The backswing plane angle adjustment bar is provided with two movable reference rings, one of which is at a location corresponding to the deltoid muscle of a player and the other is adjusted to a location corresponding to the hand at the top of backswing. The downswing plane angle adjustment bar is provided with a movable reference ring, which is set at an end of a club grip of the player.

I claim: 
     
         1 . A golf swing plane correction device, comprising a bottom board, a shaft seat, and the two angle adjustment bars;
 wherein the shaft seat is mounted to a top side of the bottom board and the two angle adjustment bars are respectively coupled, through shaft-jointing, to a central shaft of the shaft seat, the two angle adjustment bars being rotatably coupled to the shaft seat in a manner of allowing an angle thereof to be adjusted to a desired value and positioned at the desired angle through resistance provided on the shaft seat, each adjustment bar having an operation end to which an extension bar is connected; and   the shaft seat is provided, on two ends thereof, with support frames for mounting to the bottom board, wherein the support frames being each provided, at one side thereof, with a vertical board that is formed with a shaft hole, and a central shaft having two ends provided with threads and receiving an elastic element to fit over a middle portion thereof, with two sides thereof being respectively and rotatably coupled with the angle adjustment bars, and being received through the shaft holes of the vertical boards of the support frames, nuts being provided at outer sides of the vertical boards and screwed to forcibly compress the angle adjustment bars that are located at two sides toward and pressing the elastic element that is located at the center so that a reaction force generated and determined by a degree of compression of the elastic element provides an effect of adjustment of resistance.   
     
     
         2 . The golf swing plane correction device according to  claim 1 , wherein the angle adjustment bars are each provided, at one end thereof at a pivotal joint side, with a collar having ratchet teeth, a pawl projecting outward and provided at a suitable location corresponding to the ratchet teeth so that the angle adjustment bars each provide an effect of one-way step-wise angle adjustment. 
     
     
         3 . The golf swing plane correction device according to  claim 1 , wherein for the bars connected to and extending from the operation ends of the two angle adjustment bars, one of the bars being provided with two movable reference rings, and the other one of the bars being provided with a movable reference ring. 
     
     
         4 . A golf swing plane correction device, comprising a bottom board, a shaft seat, the two angle adjustment bars, and a vertical pillar;
 wherein the shaft seat is mounted to a top side of the bottom board and the two angle adjustment bars are respectively coupled, through shaft-jointing, to a central shaft of the shaft seat, the two angle adjustment bars being rotatably coupled to the shaft seat in a manner of allowing an angle thereof to be adjusted to a desired value and positioned at the desired angle through resistance provided on the shaft seat, each adjustment bar having an operation end to which an extension bar is connected; and   the vertical pillar is mounted at one side where the bars of the two angle adjustment bars extend, correctors being coupled to the vertical pillar and being adjustable for height positions thereof for respectively jointing with the bars extending from the angle adjustment bars.   
     
     
         5 . The golf swing plane correction device according to  claim 4 , wherein the shaft seat is provided, on two ends thereof, with support frames for mounting to the bottom board, wherein the support frames being each provided, at one side thereof, with a vertical board that is formed with a shaft hole, and a central shaft having two ends provided with threads and receiving an elastic element to fit over a middle portion thereof, with two sides thereof being respectively and rotatably coupled with the angle adjustment bars, and being received through the shaft holes of the vertical boards of the support frames, nuts being provided at outer sides of the vertical boards and screwed to forcibly compress the angle adjustment bars that are located at two sides toward and pressing the elastic element that is located at the center so that a reaction force generated and determined by a degree of compression of the elastic element provides an effect of adjustment of resistance. 
     
     
         6 . The golf swing plane correction device according to  claim 4 , wherein the correctors are each provided, in at least one vertical surface, with a through hole for receiving extension of the vertical pillar therethrough, an inclined block being provided at one side of the through hole, the inclined block being provided with a through aperture having two sides outward expanded to form an elongate slot for receiving extension of the bars extending from the angle adjustment bars therethrough. 
     
     
         7 . The golf swing plane correction device according to  claim 4  further comprising a conversion plane bar, the conversion plane bar being coupled through an additional corrector, in a an adjustable manner, to the vertical pillar between the two bars ( 31 ,  31   a ), two reference rings ( 40 ,  40   a ) being respectively and rotatably mounted to two ends of the conversion plane bar, one of the correctors being provided, in an end face, with a through hole for receiving extension of the vertical pillar therethrough, a rotation block being provided, in a rotatable manner, to a side surface at one side of the through hole, the rotation block being provided with a connection hole for receiving extension of the conversion plane bar therethrough. 
     
     
         8 . The golf swing plane correction device according to  claim 4 , wherein the correctors are each provided, in at least one vertical surface, with a through hole for receiving extension of the vertical pillar therethrough, an inclined block being provided at one side of the through hole, the inclined block being provided with a through aperture having two sides outward expanded to form an elongate slot for receiving extension of the bars extending from the angle adjustment bars therethrough. 
     
     
         9 . The golf swing plane correction device according to  claim 4 , wherein for the bars connected to and extending from the operation ends of the two angle adjustment bars, one of the bars being provided with two movable reference rings, and the other one of the bars being provided with a movable reference ring.