P/00/009A Section 29 AUSTRALIA Patents Act 1990 INNOVATION PATENT SPECIFICATION Invention Title: FOLDABLE SKATEBOARDING FITNESS EQUIPMENT Applicant: Tseng Chung-Ting and Wei-Yu Ho The invention is described in the following statement: 11 7019 FOLDABLE SKATEBOARDING FITNESS EQUIPMENT BACKGROUND OF THE INVENTION 1. Field of the Invention: 5 The present invention relates to a foldable skateboarding fitness equipment, in particular to the fitness equipment having a dual-rail track bar in a circular arc shape and slidably sheathed on a cushion frame by a pulley, a turnable cushion seat pivotally coupled to the cushion frame by a ball bearing, a front support frame of an elbow 10 support cushion fixed separately on both sides of the top of the track bar by a pivoting base, a link rod pivotally coupled between the bottom of the front support frame and the top of the track bar, a support leg turnably adjusted and fixed onto a rear support frame at the rear of the track bar to tilt with respect to a ground or erect, such that the front 15 support frame can be used for adjusting the length passing through the pivoting base to tilt the fitness equipment with respect to the ground, and a user can kneel on the cushion seat and support the user's body by both elbows at the elbow support cushions, and use both knees and waist or abdomen to push the cushion seat to drive the cushion frame to 20 slide back and forth along the track bar, as well as contracting and bending the waist or abdomen to rotate the cushion seat to the left and the right, and the rotation is limited by a stop member installed at an edge. This exercise simulates the skateboarding exercise and provides different advanced waist, abdomen, and hip training for 25 different users, and the skateboarding fitness equipment can be folded vertically to reduce the storage volume. 2 2. Description of the Related Art: Due to unbalanced diets and insufficient exercise facilities, people place increasingly more emphases on health, and various fitness equipments are introduced into the market. However, most of the 5 present existing exercise equipments seldom provide exercises for both waists and hips simultaneously. Even there are some, they come with a high price, a heavy weight and a large volume and fail to meet the user requirements for different advanced levels of use for different users. Obviously, the conventional exercise equipments require improvements. 10 SUMMARY OF THE INVENTION In view of the shortcomings of the conventional exercise equipments, the inventor of the present invention based on years of experience in the related industry to conduct extensive researches and 15 experiments, and finally developed a foldable skateboarding fitness equipment to overcome the shortcomings of the prior art. The present invention overcome the shortcomings of the prior art by providing a foldable skateboarding fitness equipment, having a dual-rail track bar in a circular arc shape and slidably sheathed on a 20 cushion frame by a pulley, a turnable cushion seat pivotally coupled to the cushion frame by a ball bearing, a front support frame of an elbow support cushion fixed separately on both sides of the top of the track bar by a pivoting base, a link rod pivotally coupled between the bottom of the front support frame and the top of the track bar, a support leg 25 turnably adjusted and fixed onto a rear support frame at the rear of the track bar to tilt with respect to a ground or erect, such that the front support frame can be used for adjusting the length passing through the pivoting base to tilt the fitness equipment with respect to the ground, 3 and a user can kneel on the cushion seat and support the user's body by both elbows at the elbow support cushions, and use both knees and waist or abdomen to push the cushion seat to drive the cushion frame to slide back and forth along the track bar, as well as contracting and 5 bending the waist or abdomen to rotate the cushion seat to the left and the right, and the rotation is limited by a stop member installed at an edge. This exercise simulates the skateboarding exercise and provides different advanced waist, abdomen, and hip training for different users, and the skateboarding fitness equipment can be folded 10 vertically to reduce the storage volume. It is a primary objective of the present invention is to provide a foldable skateboarding fitness equipment, having a support leg rotably adjusted and fixed onto the rear support frame, such that after the front support frame is folded, the fitness equipment can be erected to reduce 15 the storage volume. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a preferred embodiment of the present invention; 20 FIG. 2 is an exploded view of a preferred embodiment of the present invention; FIG. 3 is a schematic view of folding a skateboarding fitness equipment in accordance with a preferred embodiment of the present invention; 25 FIG. 4 is a schematic view of using a skateboarding fitness equipment in accordance with a preferred embodiment of the present invention; FIG. 5 is a schematic view of using a skateboarding fitness 4 equipment in accordance with another preferred embodiment of the present invention; FIG. 6 is a perspective view of another preferred embodiment of the present invention; 5 FIG. 7 is a perspective view of folding a skateboarding fitness equipment in accordance with another preferred embodiment of the present invention; and FIG. 8 is an exploded view of another preferred embodiment of the present invention. 10 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT To make it easier for our examiner to understand the structure and effects of the present invention, preferred embodiments are described in details with the illustration of related drawings as follows. 15 With reference to the figures, the present invention provides a foldable skateboarding fitness equipment comprising a front support frame (1), a rear support frame (2), a dual-rail track bar (3), a cushion frame (4) and a cushion seat (5), wherein the dual-rail track bar (3) is formed in a circular arc shape having a cushion frame (4) slidably 20 sheathed on the dual-rail track bar (3) by a pulley; an adjusting knob is provided for adjusting the friction of a movement, and a turnable cushion seat (5) is pivotally coupled to the top of the cushion frame (4) by a ball bearing (41); the front support frame (1) having an elbow support cushion (10) and a handle (12) installed on both sides of the top 25 of the dual-rail track bar (3) respectively by a pivoting base (30), and a link rod (11) is pivotally coupled between the bottom of the front support frame (1) and the top of the dual-rail track bar (3), and the rear support frame (2) fixed to the rear end of the dual-rail track bar (3) is 5 provided for adjusting and fixing the front support frame (1) by a screw (100) to tilt with respect to a ground. A support leg (20) is installed onto the rear support frame (2) and can be turnably fixed, wherein the quantity and position of the support leg (20) are not limited. After the 5 front support frame (1) is folded into the pivoting base (30), the support leg (20) can be spread to fix and erect the frame. In addition, a wire (200) installed between the top of the front support frame (1), the link rod (11) and the dual-rail track bar (3) is connected to a counter (201) and a counter starter (202). 10 In an actual operation, a user can adjust the length of the front support frame (1) passing through the pivoting base (30) and fix it by a screw (100), and the rear support frame (2) at the rear end is provided for tilting the dual-rail track bar (3) with respect to the ground, and the friction between the cushion frame (4) and the dual-rail track bar (3) is 15 adjusted, and the screw (300) is used for securing or loosening the connection between the cushion frame (4) and the cushion seat (5), and a user can kneel on the cushion seat (5) and support the user's body by both elbows at the elbow support cushions (10), and use both knees, and the waist or abdomen to push the cushion seat (5) to drive the 20 cushion frame (4) to slide the dual-rail track bar (3) back and forth, and the waist and abdomen are contracted and bent to determine whether or not to rotate the cushion seat (5) to the right and the left, and then a stop member (301), (302) at an edge is provided for limiting the rotation of the cushion seat (5). This exercise simulates a skateboarding 25 exercise to achieve the effect of training the user's waist, abdomen and hip, and provides different advanced levels of exercises for different users. In addition, a wire (200) is installed between the top of the front support frame (1), the link rod (11) and the top of the dual-rail track bar 6 (3) such that after the wire (200) is connected, the cushion frame (4) is moved forward to touch the counter starter (202), and the counter (201) will displace the number of times of the slide movements. After the front support frame (1) is folded into the pivoting base (30), the support 5 leg (20) can be spread and fixed to the rear support frame (2) and the rear end of the dual-rail track bar (3) to erect the whole frame, so as to reduce the storage volume. In summation of the description above, the present invention can achieve the effects of exercising the user's waist, abdomen and hips, 10 providing different advanced levels of exercise for different users, and reducing the storage volume of the fitness equipment. In addition, the structure and device of the present invention have not been disclosed, and the invention complies with patent application requirements, and thus is duly applied for patent application. 15 While the invention has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of the invention set forth in the claims. 20 7