for the purposes of promoting an understanding of the principles of the disclosure , reference will now be made to the embodiments illustrated and specific language will be used to describe the same . it will nevertheless be understood that no limitation of the scope of the invention is thereby intended , such alterations , modifications , and further applications of the principles being contemplated as would normally occur to one skilled in the art to which the invention relates . fig1 - 9 depict an example embodiment of a ball sports practice device , denoted generally by the numeral 100 , comprising a front ball capture enclosure 110 and a rear rebound structure 204 . the enclosure 110 and rebound structure 204 are supported by a front frame 114 and a rear frame 206 , respectively . the front frame 114 and rear frame 206 are adjustable , for example via a pivotal connection using upper hinges 118 and 120 . the hinges 118 and 120 allow the angle θ between the axis 211 of rebound structure 204 and axis 213 of enclosure 110 ( see fig6 ) to be adjusted . in some embodiments , support arms 240 and 242 extend downward from the approximate vertical midpoints of sidemembers 212 and 214 of the rear frame 206 as shown . adjustable locking hinges 244 and 246 connect the support arms 240 and 242 to the sidemembers 212 and 214 . the angle of the support arms 240 and 242 maintains or limits the angle θ when the device 100 is in a use position as shown in fig1 - 6 . the front and rear frames 114 and 206 may be constructed from metal , plastic , composite , or any other suitably rigid material . the term “ surface ” as used herein with respect to components of the device 100 shall be understood to mean any continuous or non - continuous boundary material , including , but not limited to , fabric , mesh , netting , chain link , or the like . it shall be understood that the terms “ front ,” “ forward ,” and “ rear ” as used herein are for convenient reference only and do not define an overall placement or orientation of the device 100 with respect to a user . as shown in fig1 and 2 , the front frame 114 includes sidemembers 140 , 142 , 144 , 146 , 148 and 150 . sidemembers 140 and 142 are generally vertical and orthogonally connected to the front ends 141 and 143 of horizontal sidemembers 148 and 150 , respectively . sidemember 144 is connected at an angle between sidemembers 140 and 148 as shown , thereby creating a generally triangular side area 160 . likewise , sidemember 146 is connected at an angle between sidemembers 142 and 150 as shown , to create a generally triangular side area 162 . upper and lower horizontal crossmembers 152 and 154 are orthogonally connected between the upper and lower ends of sidemembers 140 and 142 , respectively , as shown . the individual members 140 , 142 , 144 , 146 , 148 and 150 may be permanently attached together ( e . g ., by welding or forming as a unitary piece ) or attached together using appropriate fasteners for easier packaging and storage . netted portions 180 and 182 are wrapped around the generally triangular side areas 160 and 162 , respectively to create side capture surfaces 184 and 186 respectively . in addition , fabric portion 188 extends between the sidemembers 144 and 146 to create a rear capture surface 190 . together , the capture surfaces 184 , 186 and 190 define an interior capture area 191 . in a preferred embodiment , the side capture surfaces 184 and 186 comprise an open net material and the rear capture surface 190 comprises a heavier tarp material which is loosely fitted to allow captured balls to drop down instead of forcefully rebounding . however , the capture surfaces 184 , 186 and 190 may also be constructed of other materials including netting , fabric , plastic , wood , metal and the like . as the incoming balls drop down after striking the rear capture surface 190 , they will be directed outward toward the user due to the downward and outward angle of the rear capture surface 190 and the sidemembers 144 and 146 . in certain embodiments , the capture side capture surfaces 184 and 186 and rear capture surface 190 are sewn or otherwise attached together as a single unit . this allows the front edges of the side capture surfaces 184 and 186 to be attached to the sidemembers 140 and 142 , respectively , thereby eliminating the need to attach the rear capture surface 190 directly to the sidemembers 144 and 146 . in other embodiments , the capture surfaces 184 , 186 and 190 may be provided as separate pieces and attached to the front frame 114 individually . the side capture surfaces 184 and 186 are preferably attached to the sidemembers 140 and 142 using sleeves 181 and 183 . in one embodiment , the sleeves 181 and 183 include hook - and - loop fasteners , buttons , ties , or other appropriate securing devices which enable the sleeves 181 and 183 to be wrapped around the sidemembers 140 and 142 and secured as shown . in other embodiments , where the sidemembers 140 and 142 are separable from the front frame 114 , the sleeves 181 and 183 may be slid onto the sidemembers 140 and 142 prior to installation . a slack curtain 194 may be optionally included to further dampen the force of incoming balls as they enter the capture area 110 . the slack curtain 194 is preferably attached to the upper cross member 152 using sleeve 197 and hangs freely as shown fig2 . when not in use , the slack curtain 194 may be lifted up and laid over the top of rebound structure 204 as shown in fig1 and 6 . this also has the effect of creating a top capture surface 198 to assist in capturing incoming balls . the slack curtain 194 is preferably constructed from a heavy fabric or tarp material to increase the damping effect , although other lighter or heavier materials may be utilized depending on the degree of damping desired . it shall be understood that the slack curtain 194 may be constructed as a continuous piece or as a mesh or net . as shown in fig3 , one or more targets 195 may be optionally included to provide further guidance for the user when kicking or throwing balls into the capture enclosure 110 . in one embodiment , the targets 195 are suspended from the upper crossmember 152 . in other embodiments , the targets 195 may be attached to the slack curtain 194 or to the rear capture surface 190 . as shown in fig4 , the rebound structure 204 comprises a rebound surface 205 stretched about the rear frame 206 . the rebound surface 205 preferably comprises netting , although other types of materials may be used , such as woven fabric . rear frame 206 comprises sidemembers 212 and 214 , and upper and lower crossmembers 216 and 218 . the upper ends 220 and 222 of sidemembers 212 and 214 are connected to the rear ends 149 and 151 of sidemembers 148 and 150 by hinges 118 and 120 respectively . the rebound surface 205 is preferably attached to rear frame 206 using hooks 230 inserted into holes 231 . the rebound surface 205 is sized such that when attached to the frame 206 , it will become rigid or taut to create a forceful rebound effect on incoming balls . in the illustrated embodiment , elastic cording 232 is woven taut between the outer edges of the rebound surface 205 and the hooks 230 as shown to increase the rebound effect . as mentioned above , support arms 240 and 242 extend downward from the approximate vertical midpoints of sidemembers 212 and 214 , respectively , with lower crossmember 243 connecting the support arms 240 and 242 for stability as shown . in a preferred embodiment , hinges 244 and 246 connect the support arms 240 and 242 to the sidemembers 212 and 214 . the hinges 244 and 246 may also be configured to lock at one more selected angles , for example using locking pins . it shall be understood that other types of adjustable locking hinges or angle locking mechanisms may also be used to adjust , maintain or limit the angle of support arms 240 and 242 relative to rear frame 206 . wheels 260 and 262 are preferably attached to the lower ends of the sidemembers 212 and 214 to allow the bottom of the rear frame 206 to move freely as the angle of the rebound structure 204 is transitioned between use positions , for example from an upright use position ( as shown in fig4 ) to a more horizontal use position ( as shown in fig5 ) and vice versa . due to the action of hinges 118 and 120 , gravitational force will tend to spread the bottom of rear frame 206 and the bottom of front frame 114 laterally further apart ( thereby increasing the angle θ between axis 213 and axis 211 as shown in fig6 ). the support arms 240 and 242 , when angularly fixed relative to the rear frame 214 , will only allow the spreading to occur until a point at which the bottom of the support arms 240 and 242 make contact with the support surface 10 , such as the ground or floor . it shall be understood that other mechanisms may be used to control or limit the spreading action . for example , instead of contacting the ground , the lower ends of the support arms 240 and 242 may be attached directly to the sidemembers 140 and 142 , respectively . in other embodiments , adjustable chains , straps , or bars may be connected between the front frame 114 and the rear frame 206 . wheels 141 and 143 may be optionally provided near the lower ends of the sidemembers 140 and 142 of the front frame 114 . however , unlike wheels 260 and 262 , wheels 141 and 143 are preferably positioned such that there is a vertical gap 12 ( as shown in fig6 and 7 ) between the bottom edge 149 of the front frame 114 and the wheels 141 and 143 when the device 100 is in a use position . therefore , the bottom edge 149 of the front frame 114 will be in contact with the support surface 10 to provide stability and help prevent the device 100 from laterally sliding during use . when installed on a natural grass or dirt support surface , the lower edge 149 may sink slightly into the support surface 10 , allowing the wheels 141 and 143 to contact the support surface 10 , however the bottom edge 149 of the front frame 114 will still provide stability and prevent the wheels 141 and 143 from rolling . to transport the device 100 , the user pulls forward on the upper portion of the front frame 114 until the wheels 141 and 143 make contact with the support surface 10 as shown in fig8 . as the front frame 114 tilts forward , the rear frame 206 will collapse into the front frame 114 , further reducing the amount of force required for the user to tilt the device 100 into the transport position . due to the location of the wheels 141 and 143 relative to the lower edge 149 of the front frame 114 , the lower edge 149 will raise off the ground 10 as wheels 141 and 143 make contact with the support surface 10 as shown in fig8 . once supported by the wheels 141 and 143 , the device 100 can be safely rolled along the support surface 10 for transport . in certain embodiments , the lower end of the sidemembers 140 and 142 may include knee portions 145 and 147 which are angled downward and rearward from the sidemembers 140 and connect to the bottom ends of the sidemembers 144 and 146 as shown . the angle of the knee portions provides clearance and allows the wheels 141 and 143 to be raised above the support surface when the device 100 is in use . yet the knee portions provide the effect of decreasing the degree to which the user must tilt the front frame 114 in order for the wheels 141 and 143 to be lowered into contact with the support surface 10 for transport . the use of the knee portions 145 and 147 also allows for the lower portions of the side capture surfaces 184 and 186 to be increased , providing a more effective capture effect for balls directed to the lower portions of the enclosure 110 . while the invention has been illustrated and described in detail in the drawings and foregoing description , the same is to be considered as illustrative and not restrictive in character , it being understood that only the preferred embodiment has been shown and described and that all changes and modifications that come within the spirit of the invention are desired to be protected .
a ball sports practice device is disclosed having a forward facing ball capture enclosure and a rear facing rebound structure . the angle between the ball capture enclosure and the rebound structure may be adjusted to support the device to a plurality of use positions on a support surface . an optional support arm may be included to maintain or limit the angle between the capture enclosure and the rebound structure .