Abstract:
The present invention relates to a multipurpose exercise apparatus. More specifically, the multipurpose exercise apparatus is configured so that various kinds of exercise can be done by turning a crescent-shaped main body up and down according to the kind of exercise desire by a user, and by stepping on the main body to mount thereon or sitting down thereon, thereby allowing exercise to be enjoyed regardless of place or time and to even be enjoyed outdoors in addition to indoors and the efficiency of exercise can be maximized even with simple exercise movements. The present invention is characterized in that it has a plate shape, and it comprises a main body ( 100 ), wherein a convex surface ( 10 ) is formed at the upper part, a concave surface ( 20 ) is formed at the lower part, a handle groove ( 12 ) is provided at both the terminal parts descending along the curvature of the convex surface ( 10 ), and a supporting protrusion ( 22 ) is integrally projected at the lower part of the handle groove ( 12 ) so as to allow the main body to be separated by a certain distance from the ground; and a handle ( 200 ) which is installed on one side of the upper convex surface ( 10 ) of the main body ( 100 ) and can be attached thereto or detached therefrom.

Description:
TECHNICAL FIELD 
     The present invention relates to a multi-purpose exercise apparatus, and more particularly, to a multi-purpose exercise apparatus that enables a user to do exercise regardless of space or time outdoors as well as indoors and increases ease of use and efficiency of exercise, by allowing the user to turn over a main body of the multi-purpose exercise apparatus according to the type of desired exercise and do various kinds of exercise while stepping or sitting on the main body thereof. 
     BACKGROUND ART 
     For healthy life, many people who are pressed for time due to a busy schedule do exercise at places such as a fitness club in their spare time before and after their working hours. On the other hand, people who do not have time to do exercise at such a place have to buy a multi-purpose exercise apparatus for exercise at home. 
     However, when doing exercise at places like a fitness club, people have to bear an expensive membership fee. This makes people hesitate to use such a place. 
     Also, although exercise for the whole body can be done by an exercise apparatus such as cycling machine, chest expander, and leg press machine that is included in a multi-purpose exercise apparatus, the cost for purchasing the exercise apparatuses is expensive, and a huge area is occupied by such exercise apparatuses. In such case, doing exercise using exercise apparatuses at home may be inefficient in space utilization, and may cause a person at downstairs to complain noise thereby generated. 
     Most modern people such as employees or students using computers for a long time in a sitting posture and women wearing high heels may be exposed to various diseases such as disc-related diseases caused by deformation such as bending of the vertebrae and asymmetry of the pelvis that are caused by improper sitting habits. 
     DETAILED DESCRIPTION 
     Technical Problems 
     The present invention seeks to solve the above-mentioned problems, and provides a multi-purpose exercise apparatus for a user who does not have time to do exercise for health due to a busy schedule, which enables the user to do exercise of the whole body regardless of time and space at home without doing exercise in a place such as fitness club including exercise apparatuses at a high cost. 
     The present invention also provides a multi-purpose exercise apparatus that can be used outdoors as well as indoors and can be utilized as an amusement ride according to needs of a user. 
     Technical Solutions 
     To achieve the above-mentioned objectives, the present invention provides multi-purpose exercise apparatuses including: a main body having a crescent profile, the main body having a convex surface on an upper portion thereof and a concave surface on a lower portion thereof, and including grip grooves at both sides thereof, respectively, and support protrusions integrally formed under the grip grooves to be spaced apart from the ground by a certain distance; and a grip detachably disposed at one side of the convex surface of the main body. 
     The main body has a plurality of receiving holes for receiving pivotably-retractable wheels at edge portions of the concave surface, and the pivotably-retractable wheels are pivoted into the receiving hole on a hinge or are extended outwards. 
     The main body includes side plates that are integrally disposed at both sides of the main body, respectively, and each of the side plates has a shape corresponding to curvatures of the convex surface and the concave surface and has a side grip hole that is integrally formed at an inner side of the side plate. 
     The main body has at least one fixing hole at both sides of the convex surface thereof to allow a grip to be detachably coupled thereto. 
     The main body has a plurality of coupling holes penetrating the convex surface and the concave surface of the main body at side portions thereof, and the plurality of coupling holes are detachably coupled with elastic wires formed of an elastic material of excellent elastic resilience. 
     The multi-purpose exercise apparatus further includes a plurality of support rails disposed in the longitudinal direction on the convex surface of the main body. The plurality of support rails are spaced apart from each other by a certain distance and being integrally protruded from the convex surface of the main body. 
     The multi-purpose exercise apparatus further includes friction pads on the support protrusions to prevent sliding of the main body on the ground and reduce a shock during exercise. 
     The multi-purpose exercise apparatus further includes an elastic body detachably coupled to the fixing hole. The elastic body is partially protruded from the fixing hole to prevent the main body from inclining beyond a certain angle when a user does stepper exercise using the convex surface, and is formed of an elastic material capable of absorbing a shock for safety of a user and adjustment of exercise intensity. 
     The multi-purpose exercise apparatus further includes stopping protrusions integrally formed in the receiving holes to allow the pivotably-retractable wheels to be elastically fixed when the pivotably-retractable wheels extend outwards, and stopping holes formed in the pivotably-retractable wheels to allow the stopping protrusions to be coupled to the stopping holes. 
     The multi-purpose exercise apparatus further includes a rotation disc at the center of the concave surface of the main body to allow a user to step or sit thereon for exercise of the upper part of the body. 
     The multi-purpose exercise apparatus further includes a plurality of acupressure protrusions for performing an acupressure treatment on the feet of a user and a plurality of acupressure magnet protrusions for performing the acupressure treatment and promoting blood circulation, disposed on the concave surface of the main body. 
     Advantageous Effects 
     As described above, the multi-purpose exercise apparatus according to the present invention enables a user who does not have time to do exercise for health due to a busy schedule for exercise of the whole body regardless of time and space at home without doing exercise in a place such as fitness club including exercise apparatuses at a high cost. 
     Also, since a multi-purpose exercise apparatus according to an embodiment of the present invention can roll on the ground via pivotably-retractable wheels, the multi-purpose exercise apparatus can be used as an amusement ride by allowing one user to be seated on a main body thereof and the other user to tow the main body thereof with a tow line connected to the main body thereof. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view illustrating a multi-purpose exercise apparatus according to an embodiment of the present invention; 
         FIG. 2  is an exploded perspective view illustrating a multi-purpose exercise apparatus according to an embodiment of the present invention; 
         FIG. 3  is a rear perspective view illustrating a multi-purpose exercise apparatus according to an embodiment of the present invention; 
         FIG. 4  is a rear perspective view illustrating pivotably-retractable wheels retracted in a multi-purpose exercise apparatus according to an embodiment of the present invention; 
         FIG. 5  is an exploded perspective view illustrating a plurality of grips of a multi-purpose exercise apparatus according to an embodiment of the present invention; 
         FIG. 6  is an exploded perspective view illustrating an elastic stopper detachably inserted into a fixing hole of a multi-purpose exercise apparatus according to an embodiment of the present invention; 
         FIG. 7  is a view illustrating exemplary exercise using a convex surface of a multi-purpose exercise apparatus according to an embodiment of the present invention; and 
         FIG. 8  is a view illustrating exemplary exercise using a concave surface of a multi-purpose exercise apparatus according to an embodiment of the present invention. 
     
    
    
     BEST MODES FOR PRACTICING INVENTION 
     The present invention relates to a multi-purpose exercise apparatus. More particularly, the present invention relates to a multi-purpose exercise apparatus that enables a user to do exercise regardless of space or time outdoors as well as indoors and increases ease of use and efficiency of exercise, by allowing the user to turn over a main body of the multi-purpose exercise apparatus according to the type of desired exercise and do various kinds of exercise while stepping on or sitting on the main body thereof. 
     The multi-purpose exercise apparatus is formed of two plates. An upper plate forms a convex surface  10 , and the lower plate forms a concave surface  20 . Grip grooves  12  are provided at both end portions of the convex surface  10 , respectively. The multi-purpose exercise apparatus has a main body  100  and a grip  200 . The main body includes support protrusions  22  integrally formed under the grip grooves  12 . The grip  200  is detachably installed at one side of the convex surface  10  of the main body  100 . 
     Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. 
       FIG. 1  is a perspective view illustrating a multi-purpose exercise apparatus according to an embodiment of the present invention.  FIG. 2  is an exploded perspective view illustrating a multi-purpose exercise apparatus according to an embodiment of the present invention.  FIG. 3  is a rear perspective view illustrating a multi-purpose exercise apparatus according to an embodiment of the present invention.  FIG. 4  is a rear perspective view illustrating pivotably-retractable wheels retracted in a multi-purpose exercise apparatus according to an embodiment of the present invention.  FIG. 5  is an exploded perspective view illustrating a plurality of grips of a multi-purpose exercise apparatus according to an embodiment of the present invention.  FIG. 6  is an exploded perspective view illustrating an elastic stopper detachably inserted into a fixing hole of a multi-purpose exercise apparatus according to an embodiment of the present invention.  FIG. 7  is a view illustrating exemplary exercise using a convex surface of a multi-purpose exercise apparatus according to an embodiment of the present invention.  FIG. 8  is a view illustrating exemplary exercise using a concave surface of a multi-purpose exercise apparatus according to an embodiment of the present invention. 
     As shown in  FIGS. 1 through 6 , the multi-purpose exercise apparatus has a plate shape. An upper portion of the multi-purpose exercise apparatus defines a convex surface  10 , and the lower plate thereof defines a concave surface  20  to form a crescent shape. Grip grooves  12  are provided at both end portions of the convex surface  10 , respectively. The multi-purpose exercise apparatus has a main body  100  and a grip  200 . The main body  100  includes support protrusions  22  integrally formed under the grip grooves  12 . Each of the grip  200  is detachably installed at one side of the convex surface  10  of the main body  100 . 
     In this case, each grip  200  is vertically and detachably inserted into a fixing hole  16  that is formed in plurality at both end portions of the convex surface  10  of the main body  100 . 
     Moreover, the grip  200  includes a T-shaped support bar  210  coupled to the fixing hole  16  of the main body  16  and an elastic pad  220  of an elastic material bound to the horizontal bar of the T-shaped support bar  210  and including an elastic material. 
     In addition, an elastic body  80  is detachably coupled to the fixing hole  16 . The elastic body  80  is partially protruded from the fixing hole  16  to prevent the main body from inclining beyond a certain angle when a user does stepper exercise using the convex surface  10 . The elastic body  80  is formed of an elastic material capable of absorbing a shock for safety of a user and adjustment of exercise intensity. 
     In this case, the elastic body  80  is formed of an elastic material such as synthetic resin or rubber. If necessary, the elastic body  80  may include an elastic spring (not shown). 
     Furthermore, a friction pad  23  is attached to the surface of one end of the support protrusions  22  to prevent sliding of the main body and reduce a shock during exercise. 
     The main body may be turned over according to exercise methods of a user. 
     Also, side plates  40  are detachably disposed on both sides of the main body  100 , respectively. Each of the side plates  40  is a plate of a crescent shape that matches the curvatures of the convex surface  10  and the concave surface  20 . Each of the side plates  40  has a side grip hole  42  formed integrally therewith. 
     In this case, the side plate  40  is detachably coupled to the main body  100 , or is formed integrally with the main body  100  with the side grip hole  42  recessed at both side surfaces of the main body  100 . 
     Furthermore, as shown in  FIGS. 1 and 2 , support rails  14  are provided in the convex surface  10 . The support rails  14  may prevent the convex surface  10  of the main body  100  from being damaged by friction caused by contact with the ground and may reduce a contact area with the ground. Accordingly, the support rails  14  are integrally protruded in plurality to minimize a vibration caused by a surface contact with foreign substances on the ground. Also, the plurality of support rails  14  are spaced apart from each other by a certain distance along the longitudinal direction of the convex surface  10 . 
     In this case, a shock-absorbing pad  14   a  for absorbing a shock from the ground is preferably attached to the upper portion of the support rails  14 . The shock-absorbing pad  14   a  may be formed of an elastic material. 
     Receiving holes  24  are provided at corresponding edge portions of the concave surface  20  of the main body  100  to receive pivotably-retractable wheels  34 , respectively. In this case, each of the pivotably-retractable wheel  34  is received in the receiving hole  24  or is extended outwards via a hinge (not shown). 
     The hinge (not shown) is provided in the central portion of the receiving hole  24 . The pivotably-retractable wheel  34  is formed to have a size ½ times smaller than that of the receiving hole  24  so as not to be interfered with the receiving hole  24  when the pivotably-retractable wheel  34  retracts into the receiving hole  24  and extends outwards. 
     A stopping protrusion  24   a  is integrally formed in the receiving hole  24  to allow the pivotably-retractable wheel  34  to be elastically fixed when the pivotably-retractable wheel  34  extends outwards. Also, a stopping hole  34   a  is formed in the pivotably-retractable wheel  34  to allow the stopping protrusion  24   a  to be coupled to the stopping hole  34   a.    
     The pivotably-retractable wheels  34  are configured to allow the main body  100  to move in forward and backward directions, and if necessary, may be configured to allow the main body  100  to move in all directions. 
     A rotation disc  60  is provided on the center of the concave surface  20  of the main body  100  to allow a user to step or sit thereon for exercise of the upper part of the body. 
     In this case, shock-absorbing friction pads  62  formed of an elastic material may be provided on the rotation disc  60  to prevent a foot and a hip from sliding due to rotation during exercise of the upper part of the body and mitigate a shock by the weight of a user. 
     As shown in  FIGS. 3 and 4 , acupressure protrusions  25  and acupressure magnet protrusions  27  are protrusively disposed on the concave surface  20  of the main body  100  to perform an acupressure treatment and promote blood circulation. 
     The acupressure protrusions  25  and the acupressure magnet protrusions  27  are evenly distributed between the rotation disc  60  on the center of the concave surface  20  and the support protrusions  22 . 
     When a user does exercise using the concave surface  20  of the main body  100 , the acupressure protrusions  25  and the acupressure magnet protrusions  27  may perform an acupressure treatment on the feet of a user and simultaneously promote blood circulation, by allowing both feet of a user to step on the acupressure protrusions  25  and the acupressure magnet protrusions  27  across the rotation disc  60 . 
     In this case, the support protrusions  22  may serve to prevent the feet of a user from deviating from the acupressure protrusions  25  and the acupressure magnet protrusions  27  to the outside of the main body  100 . 
     Also, a plurality of coupling holes  26  are formed to penetrate the upper and lower portions of the main body  100  at the side end of the main body  100 . 
     An elastic wire  50  formed of an elastic material of excellent elastic resilience is detachably coupled to each of the coupling hole  26 . 
     The elastic wire  50  includes a belt  54  attached with a hook-and-loop fastener  52  detachably coupled to the coupling hole  26  at one end thereof, and a ring-shaped grip  56  held by the hand of a user at the other end thereof. 
     Here, the elastic wire  50  is configured to a belt  54  attached with a hook-and-loop fastener  52  detachably coupled to the coupling hole  26  at both ends, respectively. Thus, the elastic wire  50  is held by both hands of a user. 
     On the other hand, a belt  74  is coupled to the coupling hole  26  at one end thereof. The belt  74  is formed of an inelastic material, and is attached with a hook-and-loop fastener  52 . The belt  74  may include a tow line  70  with a belt grip  76  integrally formed therewith. When there are two or more users, one user may sit on the convex surface  10  of the main body  100 , and the other user may tow the main body  100  with the tow line  70 . Accordingly, the multi-purpose exercise apparatus  300  may also be utilized as an amusement ride. 
     When the tow line  70  is connected to the main body  100 , the pivotably-retractable wheels  34  disposed in plurality on the concave surface  20  of the main body is extended outwards. 
     The present invention configured as described above has the following advantages. 
     First, exercise methods using the multi-purpose exercise apparatus  300  are largely classified into exercise methods using the convex surface  10  of the main body  100  and exercise methods using the concave surface  10  of the main body  100 .  FIG. 7  is a view illustrating exemplary exercise using the convex surface  10  of the multi-purpose exercise apparatus according to an embodiment of the present invention.  FIG. 8  is a view illustrating exemplary exercise using the concave surface of the multi-purpose exercise apparatus according to an embodiment of the present invention. As shown in  FIG. 7A , a user may do exercise for training the lower part of the body by repetitively stepping up and down on the convex surface  10  of the main body  100  of the multi-purpose exercise apparatus  300 . As shown in  FIG. 7B , a user may stretch his/her legs and arms while lying on the convex surface  10  of the main body  100  with his/her back toward the convex surface  10 . 
     As shown in  FIG. 7C , a user may do sit-up exercise to strengthen the abdominal muscle by detachably coupling the grip  200  having a T-shape to the convex surface  10  of the main body  100  and then interposing his/her feet between the grip  200  and the convex surface  10 . 
     On the other hand,  FIG. 8  illustrates exercise methods using the concave surface of the multi-purpose exercise apparatus. As shown in  FIG. 8A , a user may step on portions of the acupressure protrusions  25  and the acupressure magnet protrusions  27  formed on the concave surface  20  with his/her feet, and may do stepper exercise by walking or running. As shown in  FIG. 8B , a user may sit on the rotation disc  60  on the center of the concave surface  20 , and then may grip the support protrusions  22  and the grip grooves  12  with his/her hands to do twist exercise of the upper part of the body. 
     As shown in  FIG. 8C , a user may do push-up exercise and exercise for the balance of the whole body by turning the concave surface  20  of the main body  10  upward, holding the support protrusions  22  and the grip grooves  12  of the main body with his/her hands, and stretching his/her waist to balance his/her body. 
     As shown in  FIG. 8D , similarly to the exercise method shown in  FIG. 8A , a user may do exercise of the lower part of the body by allowing both feet of the user to step on the acupressure protrusion  25  and the acupressure magnet protrusion  27  in the longitudinal direction of the main body  100  and then performing a repeated walking step. 
     As shown in  FIG. 8E , a user may do exercise of the lower part of the body using a walking step in the same posture as that in  FIG. 8D . In this case, the user may train both upper and lower parts of the body by doing waling step exercise while holding the elastic wires  50  coupled to the coupling holes  26  with both hands and simultaneously pulling the elastic wires  50  repetitively. 
     The multi-purpose exercise apparatus  300  is applied to various types of exercise according to users. 
     To explain exercise methods that are not shown in the accompanying drawing, the multi-purpose exercise apparatus  300  is used for yoga, training of sense of balance, and calf stretching. In the case of yoga, a user may step on the convex surface  10  of the main body  100  and then balance on one leg to pose for yoga and balance sense training. 
     As described above, the multi-purpose exercise apparatus according to an embodiment of the present invention, which is for a user who does not have time for exercise for health due to a busy schedule, enables the user to do exercise of the whole body regardless of time and space at home without doing exercise in a place such as fitness club including exercise apparatuses at a high cost 
     Also, since a multi-purpose exercise apparatus according to an embodiment of the present invention can roll on the ground via pivotably-retractable wheels, the multi-purpose exercise apparatus can be used as an amusement ride by allowing one user to be seated on a main body thereof and the other user to tow the main body thereof with a tow line connected to the main body thereof. 
     The embodiments described above are provided for illustration purposes only, and the person skilled in the art would appreciate that various modifications and equivalent embodiments are possible therefrom. 
     While the present invention has been described with reference to the particular illustrative embodiment, it is not to be restricted by the above embodiment but only by the appended claims.