DETAILED DESCRIPTION OF THE INVENTION

[0020] A muscular training apparatus according to the present invention will be described below in detail with reference to the accompanying drawings.

[0021] The muscular training apparatus can be utilized without any limitation of a place, in which wires accumulating an elastic energy are repeatedly withdrawn and released, in order to train muscles of a certain portion groups of a human body.

[0022] Referring to FIGS. ‘2’ through ‘5’, the muscular training apparatus includes a lengthy base ‘100’, a fixed frame ‘300’ fixed on the central portion of the base ‘100’, a pair of wire reels ‘110’ and ‘210’ rotatively coupled to one side of the fixed frame ‘300’, wires ‘150’ and ‘250’ each one end of which is fixed to each wire reel ‘110’ or ‘210’ and each other of which is wound around each wire reel ‘110’ or ‘210’, spiral springs ‘120’ and ‘220’ each one of which is fixed to each wire reel ‘110’ or ‘210’ and each other end of which is fixed to the fixed frame ‘300’, and grips ‘160’ and ‘260’ connected to the one end of each wire ‘150’ or ‘250’.

[0023] An annular winding groove ‘111’ or ‘211’ around which the wire ‘150’ or ‘250’ is accommodated, and an accommodating portion ‘112’ or ‘212’ in which the spiral spring ‘120’ or ‘220’, are formed in each wire reel ‘110’ or ‘210’. On end of the wire ‘150’ or ‘250’ is fixedly wound around the central portion of the winding groove ‘111’ or ‘211’ several turns, so that the wire can be released together with rotation of the wire reel ‘110’ or ‘210’.

[0024] Also, the inner end of the spiral spring ‘120’ or ‘220’ is fixedly combined with a fixing piece ‘303’ or ‘304’ in the fixing frame ‘300’, respectively. The outer end of the spiral spring ‘120’ or ‘220’ is fixed to the edge of the accommodation portion ‘112’ or ‘212’ in each wire reel ‘110’ or ‘210’, respectively. Thus, the wire reel ‘110’ or ‘210’ rotates in one direction when the wire ‘150’ or ‘250’ is released from the wire reel ‘110’ or ‘210’. In this case, the spiral spring ‘120’ or ‘220’ is contracted to accumulate an elastic energy therein. Then, when the wire reel ‘110’ or ‘210’ rotates in the other direction by the accumulated elastic energy, the release wire ‘150’ or ‘250’ is wound around the winding groove ‘111’ or ‘211’.

[0025] Also, in the muscular training apparatus according to the present invention, a rotational block ‘140’ or ‘240’ is rotatably combined with the fixed frame ‘300’, in which the wire ‘150’ or ‘250’ released from the wire reel ‘110’ or ‘210’ passes through the rotational block ‘140’ or ‘240’, and a guide roller ‘141’ or ‘241’ is rotatably combined with the rotational block ‘140’ or ‘240’, for guiding the wire ‘150’ or ‘250’. The rotational block ‘140’ or ‘240’ and the guide roller ‘141’ or ‘241’ rotate according to a releasing direction of the wire ‘150’ or ‘250’, to thereby minimize a friction at the time of releasing and winding the wire ‘150’ or ‘250’.

[0026] Meanwhile, the muscular training apparatus according to the present invention further includes a speed reducer for reducing a rotational speed of the wire reel ‘110’ or ‘210’ when the wire ‘150’ or ‘250’ is released from the wire reel ‘110’ or ‘210’.

[0027] The speed reducer includes a frictional reel ‘170’ or ‘270’ positioned in the other side of the fixed frame ‘300’, and rotatably combined with the wire reel ‘110’ or ‘210’ on the same axis as that of the wire reel ‘110’ or ‘210’, a frictional band ‘400’ frictionally contacting the outer circumferential surface of the frictional reel ‘170’ or ‘270’, and a tension adjustment unit for adjusting the tension of the frictional band ‘400’.

[0028] The speed reducer allows a user to perform a stronger muscular training exercise since the frictional reel ‘170’ or ‘270’ rotating together with the wire reel ‘110’ or ‘210’ when the wire ‘150’ or ‘250’ is released from the wire reel ‘110’ or ‘210’ undergoes a rotational resistance due to the frictional band ‘400’.

[0029] The tension adjustment unit comprises an adjustment knob ‘310’ combined with the fixed frame ‘300’ so as to idly rotate in which a screw portion ‘311’ is formed, and a movable block ‘320’ screw-engaged with the adjustment knob ‘310’, connected to the frictional band ‘400’, and ascending and descending together with the frictional band ‘400’ according to rotation of the adjustment knob ‘310’. As a result, the tension adjustment unit makes a frictional resistance with respect to the frictional reel ‘170’ or ‘270’ vary according to the ascending and descending of the frictional band ‘400’.

[0030] Referring to FIGS. 3 and 5, the wire reel ‘110’ or ‘210’ and the frictional reel ‘170’ or ‘270’ are coaxially combined with the shaft ‘101’ or ‘201’, respectively, so that the former rotates together with the latter. Reference numerals ‘130’ and ‘230’ are closing plates combined with the accommodation portions ‘112’ and ‘212’ in the wire reels ‘110’ and ‘210’, respectively. Reference numerals ‘102’ and ‘202’ are fixing pins for fixing the shafts ‘101’ and ‘201’ to the wire reels ‘110’ and ‘210’, respectively.

[0031] Also, in the muscular training apparatus according to the present invention, a one-direction clutch bearing ‘351’ or ‘352’ is combined with the shaft ‘101’ or ‘201’ of the frictional reel ‘170’ or ‘270’, so that the frictional reel ‘170’ or ‘270’ rotates when the wire ‘150’ or ‘250’ is withdrawn and released from the wire reel ‘110’ or ‘210’, and the frictional reel ‘170’ or ‘270’ does not rotate when the released wire ‘150’ or ‘250’ is wound at the time of restoring and rotating the wire reel ‘110’ or ‘210’ according to the restoring of the spiral spring ‘120’ or ‘210’.

[0032] As shown in FIGS. ‘6A’ and ‘6B’, an inclined groove ‘3541a’ or ‘352a’ is formed in the one-direction clutch bearing ‘351’ or ‘352’, and a ball or roller ‘351b’ or ‘352b’ is accommodated in the inclined groove ‘351a’ or ‘352a’, so as to make a rolling-friction with the shaft ‘101’ or ‘201’, respectively.

[0033] As shown in FIG. ‘6A’, when the shaft ‘101’ or ‘201’ rotating together with the wire reel ‘110’ or ‘210’ rotates clockwise, that is, when the released wire ‘150’ or ‘250’ is wound by the restoring of the spiral spring ‘120’ or ‘220’ which has stored an elastic energy, the roller ‘351b’ or ‘352b’ is positioned in the wider portion of the inclined groove ‘351a’ or ‘352a’, and thus the frictional reel ‘170’ or ‘270’ pressingly installed in the one-direction clutch bearing ‘351’ or ‘352’ does not rotate. In this case, the frictional reel ‘170’ or ‘270’ does not rotate even due to the frictional resistance against the frictional band ‘400’.

[0034] Also, as shown in FIG. 6B, when the shaft ‘101’ or ‘201’ rotating together with the wire reel ‘110’ or ‘210’ rotates counterclockwise, that is, when the wire ‘150’ or ‘250’ is withdrawn by a user together with operation of the spiral spring ‘120’ or ‘220’ whose radius is narrowed and then contracted so as to accumulate an elastic energy, the roller ‘351b’ or ‘352b’ is positioned in the narrower portion of the inclined groove ‘351a’ or ‘352a’ and thus the frictional reel ‘170’ or ‘270’ pressingly installed in the one-direction clutch bearing ‘351’ or ‘352’ rotates together with the rotating wire reel ‘110’ or ‘210’. Here, the frictional reel ‘170’ or ‘270’ rotates together with the frictional resistance against the frictional band ‘400’, to thus strengthen a withdrawal force of the wire ‘150’ or ‘250’ by the user.

[0035] The shaft ‘101’ or ‘201’ is rotatatively supported by bearings ‘301’ and ‘351’, or ‘302’ and ‘352’ provided in a closing frame ‘350’. The fixed frame ‘300’ and the closing frame ‘350’ in which the wire reel ‘110’ or ‘210’ and the friction reel ‘170’ or ‘270’ are installed, are covered with a case ‘500’ to thus finish an external casing, as shown in FIG. 2.

[0036] The muscular training apparatus ‘600’ having the above-described configuration according to the present invention is used as follows.

[0037] Referring to FIG. 2 as an example of using the muscular training apparatus according to the present invention, when a user who sits on a floor makes his or her feet closely contacting ground portions ‘105’ and ‘106’ in the base ‘100’, and grasping and pulling the grip ‘160’ or ‘260’, the wire ‘150’ or ‘250’ is withdrawn. When a withdrawal force applied to the pulled wire ‘150’ or ‘250’ is released, the wire ‘150’ or ‘250’ is wound around the wire reel ‘110’ or ‘210’. When such a withdrawal operation of the wire ‘150’ or ‘250’ is repeated, a particular portion of the human body is trained. As described above, since the radius of the spiral spring ‘120’ or ‘220’ is reduced so as to accumulate an elastic energy at the time of withdrawing the wire ‘150’ or ‘250’, a strong withdrawal force is needed. On the contrary, when the withdrawal force is released, the wire ‘150’ or ‘250’ is wound by the accumulated elastic energy.

[0038] Also, in order to make a stronger force needed at the time of withdrawing the wire ‘150’ or ‘250’, the adjustment knob ‘310’ is rotationally adjusted, to thus enlarge a frictional resistance between the elastic band ‘400’ and the frictional reel ‘170’ or ‘270’.

[0039] The muscular training apparatus ‘600’ according to the present invention can be used by withdrawing the wire ‘150’ or ‘250’, at a standing state where a user steps on the ground portion ‘105’ or ‘106’ in the base ‘100’.

[0040] As described above, the muscular training apparatus according to the present invention allows a user to have his or her feet supported on the base and repeatedly withdraw and release the wires, to thus enable a particular portion of the body to be trained. The muscular training apparatus is easy to carry and does not need an additional fixing unit. Thus, the muscular training apparatus can be conveniently used without any limitation of a training place. Also, the muscular training apparatus is simpler than the conventional training apparatus, to accordingly enable lightness and inexpensive production.