a crawling exerciser , as shown in fig6 and 7 , comprises two hand slides 101 each containing a wheel and two leg slides 102 each containing a wheel 103 . it contains a soft rollable carpet track 100 , the material of which can be plastics , etc . when the carpet is unfolded , the track is parallel and the cross section of the track is groove - shaped , which corresponds with the shape of the wheel 103 . both the hand slides 101 and the leg slides 102 slide in the track and make linear movements so that the wheels will not move astray . in addition , the friction between the wheel and the groove of the track is used to provide damping in order to control the hand wheels 101 and the leg wheels 102 . it is very easy to perform hand and leg alternate movements with this exerciser . a crawling exerciser , as shown in fig8 and 9 , comprises two hand slides 201 each containing a wheel and two leg slides 202 each containing a wheel 203 . it contains a soft rollable carpet track 200 , the material of which can be plastics , etc . when the carpet is unfolded , the track is parallel and is a straight , long fin height structure . the outer part of the wheel 203 is furnished with a curved groove in order to adapt to the fin - height - shaped track . when it is used , the outer part of the wheel of the hand slide 201 and the leg slide 202 is furnished with a groove in order to adapt to the fin - height - shaped track . the slides can make linear movements so that the wheels will not move astray . in addition , the friction between the wheel and the groove of the track is used to provide damping in order to control the hand wheels 201 and the leg wheels 202 . it is very easy to perform hand and leg alternate movements with this exerciser . a crawling exerciser , as shown in fig1 , comprises two hand slides 301 each containing a wheel and two leg slides 302 each containing a wheel . it contains parallel track components 300 . the hard track components 300 can be made of non - metallic material ( such as plastics ) or metals ( aluminum or iron or etc ); the shape of the track can be groove - shaped , fin height shaped , or trapezoidal , etc . it can also be two parallel round tubes . the hand slides 301 and the leg slides 302 can make linear movements so that the wheels will not move astray . in order to increase the damping of the hand slide 301 and leg slide 302 to increase their controllability , an elastic string 303 ( or more than one string ) is provided between the hand slide 301 and the leg slide 302 on the same side in this example . in this way , it is easier to perform alternate movements with the hands and the legs . in addition , in order to solve the storage space problem of the exerciser , the track components of the exerciser of the current example are all foldable . there are the hinge 304 and hinge heads 305 , 306 , 307 furnished in the middle and on both sides of the track components in order to realize the double way folding of the track components . due to the presence of the folding structure , the track is composed of the left and right hand track and the left and the right leg track . the left hand track and the left leg track are connected with the hinge , whereas the right hand track and the right leg track are connected with hinge . the two left ( hand and leg ) track and the two right ( hand and leg ) track are connected with three rods which are positioned in the front , middle and back part of the tracks in order to keep the left and right tracks parallel . there are three hinge heads 305 , 306 and 307 are furnished in the middle of the three rods , in which the hinge head 307 at the back part of the tracks can be made of two axes , in order to prevent inconvenient folding when the axes of the three hinge heads are not aligned together . the track components when they are folded are shown in fig1 . the volume of the track is reduced dramatically and can be easily stored . on the basis of example 3 , the following structure and methods are used to replace the elastic string 303 in order to increase the damping of the hand slides and the leg sides . as shown in fig1 , the wheels 308 of the hand slide and the leg slide are further furnished with a volute spiral spring 309 . as shown in fig1 , an additional elastic string 310 is furnished on the wheel 308 of the hand slide and the leg slide . as shown in fig1 , the cross section shape of the track 300 is changed to be trapezoidal . the elastic buffering material 311 is furnished on the inner side ( which contacts the track ) of wheel 308 of the hand slide and the leg slide in order to increase the friction between the wheel 308 and the track 300 . as shown in fig1 , the track 401 has a groove which encases the wheel 402 having a c - shaped shape . even when the wheel 402 slides very fast , it will not roll out of the track 401 , so that the safety of the user is secured . fig1 shows the structure of the exerciser with this kind of track and wheel structure . as shown in fig1 , the track 501 has shape . the wheel 502 has an inverted u shape . the wheel 502 slides within the track 501 so that it will not fall out of the track 501 and the safety of the user is secured . fig1 shows the structure of the exerciser of such kind of track and wheel . in addition , in order to solve the storage space problem of the exerciser , the track components of the exerciser of the current example are all foldable . there are the hinges furnished in the middle of the track components in order to realize the folding of the track components . due to the presence of the folding structure , the track is composed of the left and right hand track and the left and the right leg track . the left hand track and the left leg track are connected with the hinge , whereas the right hand track and the right leg track are connected with hinge . the track components when they are folded are shown in fig2 . the volume of the track is reduced dramatically and can be easily stored . as shown in fig1 , the track 601 has a t shape . the slide block 602 contains the shape of the track 601 . after the user exerts forces , the slide block 602 slides within the track 601 . even when the speed of the slide block 602 is very high , it will not fall off the track , so that the safety of the exerciser is secured . fig2 shows the structure of the exerciser of such kind of track and wheel . as shown in fig2 , the track 701 is parallel round shaped track . the slide block 702 has a round shape , which wraps the track 701 and is positioned outside the track 701 . after the user exerts forces , the slide block 702 slides within the track 701 . even when the speed of the slide block 702 is very high , it will not fall off the track , so that the safety of the exerciser is secured . fig2 shows the structure of the exerciser of such kind of track and wheel . as shown in fig2 , there is a pin hole on the wheel . when the wheel needs to be fixed , a retaining structure such as the catch pin 801 is inserted into the pin hole . fig2 shows the 3d structure of the hand slide which is fixed by the catch pin 801 . fig2 shows the structure of the exerciser with this catch pin structure . in comparison with example 8 , the retaining structure such as the catch pin of the exerciser of this example has a fin height shaped catch pin . take the hand slide for example , the fin height shaped catch pin 901 in fig2 is rotatable . when it is inserted into the pin hole of the wheel of the hand slide , the fin height shaped catch pin 901 is rotated to a certain degree and the wheel is then locked . fig2 shows the 3d structure of the fin height shaped catch pin 901 of the hand slide . fig2 shows the structure of the exerciser with this type of catch pin structure . the above are only relatively good examples of the current invention , and are by no means used to limit the scope of the current invention . any modification and changes within the scope of the application all belong to the current scope of protection of the current invention .
the current invention relates to an exerciser , especially a crawling exerciser , comprising two hand slides each containing a wheel and two leg slides each containing a wheel , characterized in that , characterized in that it also contains components of a linear parallel track , wherein both the hand slides and the leg slides slide in the track and a damping structure is installed on the wheels or between the wheels and the track . the exerciser of the current invention is convenient , flexible , easy to control , and is easy to perform alternate movements of the hands and legs . it does not damage the floor , carpet or ground , and is very appropriate for indoor application .