the detailed embodiments of the present invention are disclosed herein . it should be understood , however , that the disclosed embodiments are merely exemplary of the invention , which may be embodied in various forms . therefore , the details disclosed herein are not to be interpreted as limited , but merely as the basis for the claims and as a basis for teaching one skilled in the art how to make and / or use the invention . referring to the drawings , the golf training apparatus takes the general form of a golf ball hitting platform 10 . the platform 10 includes a main support frame 12 having an upper planar support surface 14 . the upper planar support surface 14 is preferably formed of a simulated grass mat 16 which is generally rectangular in shape , approximately 2 ′× 3 ′ in size and formed in one or two sections . the mat 16 is supported by overlapping flanges 18 of the main support frame 12 and is replaceable with another mat if it becomes worn . the underside ( not shown ) of the platform 10 is recessed inwardly for purposes described hereinbelow . one lateral edge of the main support frame 12 is formed with a lowered , or recessed , planar surface 20 and a slotted channel 22 formed by the main support frame 12 and upper flanges 21 in order to receive a selected one of a plurality of teeing area panels 24 . the teeing area panels 24 are interchangeably connected to the main support frame 12 by slidably fitting into the channel 22 such that the teeing panel 24 rests on the planar support surface 20 . preferably , the channel 22 is sized to provide a loose friction fit with the teeing area panel 24 . teeing area panel 24 is a planar simulated grass support surface , which is used as a teeing area for hitting golf balls . fig3 shows a plurality of interchangeable teeing area panels 26 , 28 and 30 which may be used in accordance with the present invention . teeing area panel 26 is a simulated grass , planar support surface having a slot 46 along an outer longitudinal edge 32 to accommodate another accessory as described hereinbelow . teeing area panel 28 is a simulated grass , planar support surface having a bunker board accessory 34 . teeing area panel 30 is a simulated grass , planar support surface having a bunker tray accessory 36 . a knee brace accessory 38 , described in detail hereinbelow , is removably mountable to the main support frame 12 . in addition , an upright wall accessory 40 is removably attachable to the main support frame 12 when used in combination with teeing area panel 26 , as described in detail hereinbelow . it will be appreciated that each of the teeing area panels 24 , 26 , 28 and 30 are identically sized so as to be interchangeable and frictionally fit into the channel 22 . as such , different panels may be used to present a golfer with a variety of simulated conditions such as would be found on a golf course , without departing from the spirit of the present invention . another feature of the practice platform 10 is portability . with this in mind , an edge of the main support frame 12 of the platform 10 is provided with wheel casters 42 . side edges of the platform 10 are provided with handles 44 to enable the platform 10 to be placed upon its side and rolled , for example , from a storage to a use position . referring to fig4 teeing area panel 26 is shown in detail . the teeing panel 26 is generally rectangular in shape and includes a slot 46 along an outer lateral edge 32 for positioning of an upright swing path wall accessory 40 described hereinbelow . preferably , the teeing area panel 26 is provided with a simulated grass , mat surface 48 and may also include an opening 50 to accommodate a conventional rubber driving range tee ( not shown ) which would project upwardly through the opening 50 to present a raised tee upon which a ball may be placed . it will be appreciated that the simulated grass may be short to simulate a fairway cut or it may be longer to simulate rough . fig5 illustrates in detail the second teeing area panel 28 , which is identical in peripheral size to the other panels and fits onto the recessed planar surface 20 on the platform 10 in the same way as described hereinabove . this teeing panel 28 includes an integrally formed bunker board 34 having a slightly concave upper surface 52 . the concave upper surface 52 is designed to accommodate natural sand so that it may be used to simulate a sand trap environment for the execution and practice of sand shots . fig6 shows still another interchangeable teeing area panel 30 in detail . the teeing area panel 30 includes a shallow sand tray 36 . this panel 30 is also interchangeable with the other panels and fits onto the recessed planar surface 20 of the platform 10 . the tray 36 is structured to receive sand so that a golfer may practice sand shots . the platform 10 may be used with several training attachments . fig7 illustrates a swing guide attachment in the form of an upright swing path wall 40 . the upright wall 40 is shaped and positioned to prevent shanking of golf shots caused by a golf ball being hit by the hosel of the club head . the upright wall 40 has one side covered in mat fabric 54 . the upright wall further includes a pair of support brackets 56 extending downwardly from a lower edge 58 thereof . each support bracket includes an aperture 57 shaped and dimensioned to receive a locking bolt 59 which may be passed through the aperture 57 and screwed into holes ( not shown ) formed along the edge of the main support frame 12 to lock the upright wall 40 in position adjacent the hitting area . while a specific attachment structure is disclosed in accordance with a preferred embodiment of the present invention , various attachment structures may be employed without departing from the spirit of the present invention . when properly positioned , the mat surface 54 of the wall 40 prevents outward movement of a club head as it is being swung . by properly locating a ball to be struck , the possibility of a golfer hitting a shanked shot is totally eliminated . fig8 and 9 illustrate a training attachment which serves as a knee brace attachment 38 to prevent a golfer &# 39 ; s knee from moving laterally forward during the execution of a golf shot . the knee brace attachment 38 is formed by three flat planar members 60 configured into a triangle and extending upwardly against a golfer &# 39 ; s leading leg . this prevents the golfer &# 39 ; s leg from moving laterally during the execution of a golf swing and promotes weight shift and a leg turn . the flat planar members 60 of the knee brace attachment 38 is preferably lightweight aluminum . the knee brace attachment 38 has a base 68 , an upright leg 70 formed at 90 ° thereto and an angular support member 72 . the members 60 are attached at 90 °, 60 ° and 30 °, respectively , although these angles may be increased or decreased , depending upon the overall height of the upright knee brace 38 . a soft flexible shock absorbing material 74 , such as a piece of carpet or synthetic turf , is attached to the outer side of the upright leg 70 to form a cushion for the golfer &# 39 ; s leg . the knee brace attachment 38 is mounted to a support bracket 76 by connectors 78 and , in turn , is supported to the main support frame 12 by the support bracket 76 . while a specific attachment structure is disclosed in accordance with the present invention , various attachment structures may be employed without departing from the spirit of the present invention . for example , it is contemplated in accordance with a preferred embodiment of the present invention that the base 68 be formed with multiple holes to permit ready adjustment of the knee brace &# 39 ; s position . fig1 illustrates another training attachment for use in accordance with the present invention . a swing plane attachment 80 is used to train a golfer the proper inside swing plane position a golf club should traverse through the impact area when striking a golf ball . the swing plane attachment 80 is formed of a solid , rectangular reference board 82 preferably having an upper padded surface . referred to fig1 a , the swing plane attachment 80 is pivotally mounted to a bracket 84 shaped and dimensioned for secure attachment to the main support frame 12 of the platform 10 . the bracket 84 is secure to the main support frame 12 by a pair of locking bolts 86 . the swing plane attachment 80 rotates to accommodate all sizes and swing shapes of golfers . using the swing plane attachment 80 , a golfer having an excessive inside - out or outside - in swing plane will be given immediate feedback as the club strikes the padded surface of the rectangular reference board 82 . with this in mind , the reference board 82 is pivotally supported for angular adjustment . specifically , a support bar 83 extends between the bracket 84 and the reference board 82 with a first end 83 a of the support bar 83 being pivotally attached to the bracket 84 and a second end 83 b of the support bar 83 being releaseably secured to the reference board 82 to allow for attachment of the second end 83 b at various points along the reference board 82 . in this way , the support bar 83 may be adjusted along the reference board 82 to facilitate angular adjustment of the reference board 82 . while a specific attachment structure and pivoting structure are disclosed in accordance with the present invention , various attachment and pivoting structures may be employed without departing from the spirit of the present invention . fig1 shows a swing limiter attachment 90 made of a padded cylindrical stop member 92 which is supported and positioned on an l - shaped , upright rod 94 so as to lie across the swing plane . the upright rod 94 is releaseably secured to the main support frame 12 in much the same manner as the upright wall accessory 40 , although a variety of mounting structures may be employed without departing from the spirit of the present invention . preferably , the upright rod 94 is telescoping to allow the height of the stop member 92 to be readily adjusted . the padded cylindrical stop member 92 of the swing limiter attachment 90 acts as a stop to engage the shaft of a golf club as the golfer executes the backswing portion of a golf swing . the padded cylindrical stop member 92 may be placed in various backswing positions to provide feedback to the golfer as to the length of a particular backswing . the teeing panels and attachments described above may be used alone or in combination . for example , a golfer using a simulated grass teeing panel 24 may also use the knee brace 38 , the swing slot guide 80 , the swing limiter 90 and the anti - shank wall 40 at the same time to perfect a golf swing . referring to fig1 to 15 , the platform 10 is designed to be positioned at a variety of support angles by using a pair of support blocks 99 which may be placed on adjacent , inner corners of the support platform to raise a particular edge depending upon the ground angle to be simulated . by selecting the location of the support blocks 99 , it will be appreciated that the platform 10 may be sloped upwardly , downwardly and to either side depending upon the location of the blocks 99 . this enables a golfer to hit golf shots simulating uphill lies , downhill lies , lies where the ball is below the golfer &# 39 ; s feet , and lies where the ball is above the golfer &# 39 ; s feet . the blocks 99 may be of a variety of sizes to simulate a smaller or greater slope of the simulated ground surface . fig1 illustrates a practice platform 10 wherein the elevating blocks 99 are positioned on a forward edge of the practice platform 10 , thereby simulating an uphill lie condition for the golfer . fig1 illustrates a practice platform 10 wherein the elevating blocks 99 are located along a rearward edge of the platform 10 , thereby simulating a downhill lie condition for the golfer . fig1 illustrates a golf practice platform 10 of the present invention using a pair of support blocks 99 which elevate a side of the platform 10 above ground surface to simulate a lie condition where a golf ball is above the feet of a player . fig1 illustrates a practice platform wherein the elevating blocks 99 are located on the opposite side of the platform 10 , thereby simulating a position where a golf ball is below the feet of the golfer . fig1 illustrates a corner 100 of the underside of the platform 10 . the edges 102 of the main support frame 12 cooperate with a corner bracket 104 to locate a supporting block ( not shown ) in position . each corner 100 has the same structure permitting any two corners to be used with supporting blocks to simulate the lie conditions described with reference to fig1 to 15 hereinabove . while various preferred embodiments have been shown and described , it will be understood that there is no intent to limit the invention by such disclosure , but rather , is intended to cover all modifications and alternate constructions falling within the spirit and scope of the invention as defined in the appended claims .
a golf ball hitting platform for practicing a variety of golf shots having a base upon which a golfer stands and interchangeable teeing panels at the teeing area , including a fairway teeing panel , a rough teeing panel , a bunkerboard teeing panel , a bunker tray teeing panel and a special fairway panel for use with sloped platform settings . the platform also includes training attachments including a knee brace , a shank preventing upright wall , a swing limiter to limit the length of the golfer &# 39 ; s backswing and a swing plane guide to insure a proper take - away and define an inside plane of the swing path . elevating blocks allow the platform to be oriented to simulate a variety of slope conditions .