a collapsible resistance exercise device in accordance with the invention has a low profile when collapsed and may be quickly deployed and readied for use by an exerciser without the need for tools or the assembly of separable parts other than the attachment of springs to the device . fig1 is a perspective view of an exercise device 10 in accordance with the present invention wherein the device 10 is collapsed for storage . the device 10 has a base support frame 11 with a lower end 12 a of an upright frame 12 pivotally attached thereto . a resistance bar 13 is attached to a transverse bar 14 pivotally mounted on the upright frame 12 . a pair of guide slots 15 a and 15 b receive guide pins 16 a and 16 b into a detent on the rearward end of the guide slots when the upright frame 12 is raised to an upright position as shown in fig2 . fig2 is a perspective view showing the device of fig1 , without springs attached thereto , deployed for exercising . the upright frame 12 includes a plurality of spring attachment loops 21 affixed thereto that provide means for attaching an end of a spring to the device . the forward end of the guide slots 15 a and 15 b also provide means for attaching a spring to the device 10 . a pad 20 is provided to support the body of an exercisor as shown in fig3 . fig3 is a perspective view of the device 10 showing an exerciser 30 using the device to exercise muscles associated with rearward extension of the left leg and hip . the forward end 31 a of a spring 31 is shown attached to the forward end of the guide slot 15 b and the rearward end 31 b of spring 31 is attached to a strap 32 which provides means for the exerciser 30 to place the left foot in order to extend and relax the spring 31 . fig4 is a perspective view of the device 10 showing an exercisor 30 using the device to exercise muscles associated with both of the exercisor &# 39 ; s legs and hips . the rearward ends of the springs 31 are attached to spring attachment loops 21 on the upright frame and the rearward end of the springs are attached to straps 32 . fig5 is a perspective view of the device showing an exercisor using the device in a sitting position to perform pull - down / push - down type exercises . turning to fig6 and 7 , a wall - mountable exercise device ( hereinafter referred to as “ the croft device ”), disclosed in u . s . pat . no . 6 , 328 , 679 to the present inventor , is generally indicated at numeral 100 . the croft device 100 includes a rectangular frame 110 attached to a wall 120 by frame mounting means 130 such as , for example , screws . the frame 110 includes a plurality of spaced spring attachment loops 140 integral therewith . a transversely oriented hinge bar 150 is rotatably attached to the frame by a pair of hinge bar mounting brackets 160 affixed to the frame 110 . the hinge bar 150 has left and right ends , labeled 610 and 620 in fig1 , extending laterally from the hinge bar mounting brackets 160 . the croft device 100 includes a left swing arm 170 ( not visible in fig6 ) and a right swing arm 180 . a distal end of both swing arms are rotatably attached to the respective left and right ends 610 and 620 of the hinge bar 150 . the opposing , proximal ends of the left and right swing arms are non - rotatably attached to left and right ends of a resistance bar 250 which provides a gripping surface for an exerciser &# 39 ; s hands . resistance to motion of the resistance bar is provided by left and right extensible springs 210 ( not visible in fig6 ) and 220 . a distal end of the springs include a hook 1100 thereon which releasably engages one of the plurality of spring attachment loops 140 on the frame . a hook 1111 on the proximal ends of the respective springs releasably engages one of the spring attachment loops 230 a , 230 b , 240 a or 240 b disposed on the proximal ends of the respective swing arms . an important feature of the croft device 100 is that the device 100 has fewer separable parts than previous prior art devices and the modular construction permits shipping the device as a kit that is easily assembled . the frame 110 comprises an upper horizontal member 110 a , a lower horizontal member 110 b , a left vertical member 110 c and a right vertical member 110 d . the four members comprising the frame preferably have mitered corners and are affixed to one another by frame attachment plates 1700 to form a rectangle as shown in fig7 . the overall dimensions of the frame 110 are 47 inches high and 18 . 5 inches wide . the four members comprising the frame and the four frame attachment plates are most preferably aluminum . a plurality of spring attachment loops 140 are disposed along the length of the vertical members 110 c and 110 d and spaced from one another by a distance of about 3 inches . the spring attachment loops 140 are integral with the frame 110 and are made by die punching the wall of the vertical members to cut two slots and stretching the material between the slots outwardly to form a loop . in operation , an exerciser places a targeted portion of the body in contact with the resistance bar and exerts a force on the resistance bar sufficient to move the resistance bar thereby extending the spring against a restoring force . the force required to displace the resistance bar and extend the spring is substantially constant over the range of motion . the resistance bar is then allowed to return to its initial position and the motion repeated until the targeted body portion is sufficiently exercised . the selection of spring attachment hooks 14 on the frame that are available to the exerciser for anchoring the distal hook 1100 of the spring makes it possible to exercise a variety of muscles within the body . a further embodiment of a wall - mountable croft device is shown at numeral 1800 in fig8 . in the embodiment 1800 , the frame 110 is of unitary construction , wall - mountable and is preferably made of ⅛ - ¼ inch aluminum plate or from four extruded aluminum members joined to form a rectangular frame by welding or the like . the hinge bar , swing arms and resistance bar are incorporated into a single unitary , substantially u - shaped resistance member 1810 that is rotatably attached to the frame 11 at two distal ends 1840 . the unitary resistance member 1810 , which has at least two spring attachment loops 1820 integral therewith adjacent a resistance bar portion 1830 , is preferably extruded aluminum rod or tubing formed into a u - shape by bending the extruded member around a mandrel to the desired shape . in the embodiment 1800 , the hinge bar mounting brackets 160 preferably include roller bearings press - fitted into the bore 1610 to reduce wear on the moving surfaces . embodiment 1800 has six separable parts : a unitary frame 110 , a unitary resistance member 1810 , two hinge bar mounting brackets 160 and two springs 220 . while wall - mountable croft devices may be suitable for many installations , it may be desirable to transport the device such as , for example , in a vehicle , for use while traveling . the present invention discloses an exercise device comprising a storage case adapted for pivotal attachment to a modified frame 110 of a croft device such as , for example , the embodiment 1800 of the croft device shown in fig8 . the storage case , indicated in perspective view at numeral 400 in fig9 , is integral with the croft device 1800 . the storage case 400 provides stable support for the croft device , obviates the need for wall - mounting the device and provides a compact , low - profile means for storing and transporting a croft device when not in use . the storage case 400 includes a rectangular lid 410 having a fixed end 450 that is pivotally attached to a rectangular base 420 by means of a hinge 430 . the lid 410 has a pair of notches 430 a and 430 b at a free end 440 thereof that serve to support the frame 110 of the croft device 1800 , wherein the frame 110 is modified to provide pivotal attachment means 510 thereon , when the modified frame of the device is erected for use as shown in fig1 . the base 420 of the storage case 400 includes a pair of cylindrical holes 460 dimensioned to receive pivotal attachment means 300 and 310 on the frame 110 . with reference now to fig1 , an exercise apparatus comprising a croft device 1800 pivotally attached to a storage case 400 is indicated in perspective view at numeral 500 . the lid 410 of the storage case is shown opened to expose the croft device 1800 housed therewithin . the frame 110 of the croft device 1800 is pivotally attached to the storage case 400 by pivotal attachment means 510 . the pivotal attachment means is preferably a pair of cylindrical axles 300 and 310 ( fig8 ) extending outwardly from the base of the frame to rotate within cylindrical recesses or holes 460 in the rectangular base 420 of the storage case 400 . the frame , which may be u - shaped inasmuch as the lower horizontal member 110 b of the prior art croft device is not required , is erected by lifting the lid 410 , rotating the frame upwardly from the confines of the storage case as shown in perspective view in fig1 and closing the lid as shown in fig1 . when the frame is erected and the lid 410 closed , the notches 430 a and 430 b on the lid 410 fit snugly against the frame 110 to prevent the frame from collapsing into the storage case 400 when the device 500 is being used . assembly includes the attachment of a pair of springs 220 ( not shown in fig9 - 12 ) to the appropriate spring attachment loops 140 on the frame 110 and loops 1820 on the swing arms 1810 of the device to provide the desired resistance in the manner discussed above in the description of the assembly and operation of the wall - mounted croft devices 100 and 1800 . the exercise device 400 of the present invention is readily stored when not in use and easily transported . while the invention has been described with reference to certain preferred embodiments , those skilled in the art will appreciate that various modifications , changes , omissions and substitutions can be made without departing from the spirit of the invention . it is intended , therefore , that the invention be limited only by the following claims construed as broadly as applicable law allows , including all proper equivalents thereof .
a collapsible resistance exercise device for compact storage and quick deployment includes a horizontally disposed base support frame and an upright frame pivotally attached to the base frame . the upright frame includes a resistance bar pivotally mounted thereon . in practice , the device is placed on a level surface with the base support frame resting on the surface . the free end of the upright frame is rotated upwardly to a vertical position where it is releasably locked into position to be free standing . one end of a pair of springs are attached to spring attachment loops disposed on the upright frame . the opposing ends of the springs are attached to spring attachment loops disposed on a resistance bar , strap or similar device . the exercisor exercises a muscle group by contacting a limb with the resistance bar and repetitively moving the resistance bar against the restoring force of the springs .