there are two embodiments of the boxing device of the invention : a double end bag ( fig2 ); b . a small heavy bag ( fig3 ). in the preferred embodiment , referring now to the drawings , wherein like reference numerals designate the corresponding structure , part , or element , as the case may be , throughout the views , a boxing device constructed in accordance with the preferred embodiment of the present invention comprises a reel type piece ( 11 ) that can be separated from each other and that works as an axis holding the swinging boxing arm ( 12 ). this piece holds a metal rod ( 13 ) on top of it which holds the nylon or metal cable ; a foam covered thick pvc material swinging or rotating boxing arm that moves over the reel type piece with a t - type rod ( 14 ) that holds a boxing glove ( 15 ); a funnel type piece ( 16 ) made of thick aluminum metal or pvc material that is placed over the double end bag bladder and the heavy bag in both superior and inferior portions ; both funnels are covered with leather and held in place with tight on strings ; the funnel &# 39 ; s small portion is inserted into the hollow inferior portion of the reel and a plastic covered or nylon cable runs through it and the reel . this cable is held in place by the metal rod on top of the reel piece . the end of this cable has a metal double triangle ( 17 ) to hold the metal rod and the superior rubber cable or metal spring . a similar piece is used to hold the inferior reels rod and rubber cable ; the funnel small portion is applied to the hollow inferior portion of the reel and a plastic covered or nylon cable runs through it and the reel . this cable is held in place by the metal rod on top of the reel piece . the end of this cable has a metal double triangle to hold the metal rod and the superior rubber cable or metal spring . a similar piece is used to hold the inferior reels rod and rubber cable ; the union of the funnel piece and the hollow reels portion provides a rocking movement that lets the boxing arm move in superior - inferior inferior - superior motion ; three of the four plastic covered cables attached to a central ring under the funnel and this one attached to another plastic covered metal cable holds the heavy bag to the upper metal spring in the ceiling . this spring gives flexible movement to the heavy bag . the boxing arms moves unpredictably without a specific pattern . in other embodiments , pressure sensors can be applied to the boxing arms gloves and to the specific areas of the double end bag and heavy small bag to count the punches that the trainee receives and the punches that he lands to give a simulation of a boxing match . the height of the double end bag and small heavy bag can be adjusted to any trainee by using longer or shorter rubber cables and by changing the amount of chain links and rubber cable respectively . collored dots can be applied to different areas of the double end bag and small heavy bag to improve punch accuracy . in the preferred embodiment , the double end bag gives punch speed and the small heavy bag gives punch power . when the double end bag and heavy bag are hit by a punch or foot this initiates an antero - posterior or lateral movement . this movement causes a physical reaction in the boxing arm making a left - right - left horizontal rotational movement . the rocking funnel - reel movement allows a superior - inferior and inferior - superior rotational or straight movement of the boxing arm . when the user punches the double end bag - small heavy bag hard the boxing arms will hit him back faster and if he hits it softer the boxing arms will move slower . the upper boxing arm is two inches longer than the inferior boxing arm . this is to simulate a superior jab punch and inferior lower body punch respectively . thus , there has been shown and described a boxing device that fights back which fulfills all the objects and advantages sought therefor . the invention is not limited to the precise configuration described above . while the invention has been described as having a preferred design , it is understood that many changes , modifications , variations and other uses and applications of the subject invention will , however , become apparent to those skilled in the art without materially departing from the novel teachings and advantages of this invention after considering this specification together with the accompanying drawings . accordingly , all such changes , modifications , variations and other uses and applications which do not depart from the spirit and scope of the invention are deemed to be covered by this invention as defined in the following claims and their legal equivalents . in the claims , means - plus - function clauses , if any , are intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures . all of the patents , patent applications , and publications recited herein , and in the declaration attached hereto , if any , are hereby incorporated by reference as if set forth in their entirety herein . all , or substantially all , the components disclosed in such patents may be used in the embodiments of the present invention , as well as equivalents thereof . the details in the patents , patent applications , and publications incorporated by reference herein may be considered to be incorporable at applicant &# 39 ; s option , into the claims during prosecution as further limitations in the claims to patentably distinguish any amended claims from any applied prior art .
a boxing device that fights back in response to an attackers blows to simulate a boxing match comprises a boxing bag , a pair of padded arms each having a boxing glove at its end , and a pair of reel type pieces wherein each of said reel type piece works as an axis holding each a padded arm that rotates around the piece in response to an impact applied to the boxing bag .