Abstract:
The present invention relates to an inner bladder structure of punching bag which comprises one inner bladder; the said inner bladder further comprises at least one gas container and at least one liquid container. Utilizing liquid, gas and solidifying substances, the said inner bladder structure creates different tactile feels to diversify the effect of training.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to an inner bladder structure of punching bag; particularly one that using liquid and air simultaneously as filler, and the weight and tactile feel of inner bladder can be adjusted in accordance with user&#39;s demand. 
         [0003]    2. Description of Prior Arts 
         [0004]    Conventional inner bladder structure of punching bag is shown in  FIG. 1 ; the foregoing conventional inner bladder is a closed inner bladder using solid (such as sand), liquid (such as water), or gas (such as air) as filler  30  and placed inside one external bag  20 . 
         [0005]    It is easy and cheap to obtain said filler  30 ; however, the weight of punching bag impacts on the training effect. When solid is used as filler  30  in inner bladder, the punching bag is heavy and therefore cannot be easily moved and stored. When liquid is solely used as filler  30  in inner bladder, the heaviness of punching bag would result in poor training effect. When gas is used as filler  30  in inner bladder, the punching bag is generally too light in weight and requires other accessories to fix it in place, thus result in poor training effect. 
         [0006]    In addition, for conventional punching bag structure, be it adopting solid, liquid, or gas as filler  30 , there is only one tactile feel. When filling with solid, punching bag gives a firm texture while filling with liquid adds some softness and resilience. When filling with gas, punching gas is even more resilient. However, none of the foregoing fillers can be adjusted in the structure to create different textures to satisfy user&#39;s different training demand. 
         [0007]    Thus, there are foregoing drawbacks of conventional inner bladder structure in prior art to be improved. 
       SUMMARY OF THE INVENTION 
       [0008]    To improve drawbacks of prior invention, the present invention provides an inner bladder structure of punching bag allowing users to adjust weight of inner bladder for better training effect. 
         [0009]    The present invention discloses an inner bladder structure of punching bag comprising one inner bladder; the said inner bladder further comprises at least one gas container and at least one liquid container. 
         [0010]    Wherein, said gas container is an inner bladder for gas storage placed in inner compartment of said inner bladder. Said gas container comprises at least one air valve set installed on one end of said gas container connecting to interior of said gas container. Said liquid container is an inner bladder for liquid storage placed in outer compartment of said inner bladder. Said liquid container comprises at least one water inlet set installed on side or top surface of said liquid container connecting to interior of said liquid container. 
         [0011]    The said water inlet set is used to adjust weight of liquid or colloid inside said liquid container and said air valve set is used to adjust pressure and volume of gas inside said gas container. Using said water inlet set and air valve set, allocation of liquid or colloid inside said liquid container can be adjusted, and thus it is possible to adjust weight of inner bladder in accordance with user&#39;s demand to obtain better training effect. 
         [0012]    Colloid inside said liquid container, which is preferred, is obtained by adding solidifying substances such as Superabsorbent Polymer (SAP) to liquid, to adjust the firmness of said liquid container. Said air valve, at least one, is selected from either inflation valve for balls or air bed valve. Said water inlet set comprises one water inlet and one sealing section to control liquid injection and drain. Said sealing section is concave water plug or manual water valve, and is sealed on one end of the said water inlet. 
         [0013]    Aside from foregoing formation and function of inner bladder structure described above, said liquid container additionally comprises at least one air valve set installed on top end of said liquid container connecting to interior of said liquid container. Hardness of said inner bladder can be adjusted by air inflation or exhaust via said air valve set, and thus to adjust tactile feel. Moreover, said inner bladder comprises one fixed-shape ring on top part of said inner bladder and fixed on said liquid container to shape the top of said liquid container as to avoid damage from collapses and wrinkles due to insufficient pressure on top of said liquid container. The fixed-shape ring also serves to make the liquid container a better appearance. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWING 
         [0014]      FIG. 1  is a three-dimensional view of prior invention. 
           [0015]      FIG. 2  is a three-dimensional view of embodiment A of present invention. 
           [0016]      FIG. 3  is a sectional view of embodiment A with partially air inflation. 
           [0017]      FIG. 4  is a sectional view of water inlet of embodiment A. 
           [0018]      FIG. 5  is a sectional view of embodiment A with full air inflation. 
           [0019]      FIG. 6  is a three-dimensional view of embodiment B of present invention. 
           [0020]      FIG. 7  is a three-dimensional view of embodiment C of present invention. 
           [0021]      FIG. 8  is a three-dimensional view of embodiment D of present invention. 
           [0022]      FIG. 9  is a three-dimensional view of embodiment E of present invention. 
           [0023]      FIG. 10  is a three-dimensional view of embodiment F of present invention. 
           [0024]      FIG. 11  is a three-dimensional view of embodiment G of present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0025]    Please refer to  FIGS. 2 ,  3 ,  4  and  5  for three-dimensional view, sectional view of partial air inflation, sectional view of water injection, and sectional view of full air inflation of embodiment A of inner bladder structure of present invention. Said inner bladder structure comprises one inner bladder  10  which is a hollow inner bladder; and said inner bladder  10  further comprises: 
         [0026]    at least one gas container  11  and at least one liquid container  12 ; 
         [0027]    wherein, said gas container  11  is a inner bladder for gas storage placed in inner compartment of said inner bladder  10 . Said gas container  11  comprises at least one air valve set  111  installed on one end of said gas container  11 . Said air valve set  111  comprises one inflation valve for balls  1111  and one air bed valve  1112 . Said liquid container  12  is an inner bladder for liquid or colloid storage placed outside said gas container  11 . Said liquid container  12  comprises at least one water inlet set  121  and at least one air valve set  122 . Said water inlet set  121  is concave and installed on the side of said liquid container  12 ; said water inlet set  121  further comprises one water inlet  1211  and one sealing section  1212 . Said sealing section  1212  is a water plug  12121 ; and said air valve set  122  is positioned on top side of said liquid container  12 , as showing in  FIG. 2 . 
         [0028]    Said air valve set  111  connects to interior of said gas container  11  to control air pressure inside said gas container  11 . Said water inlet set  121  connects to interior of said liquid container  12  to control volume of liquid or colloid inside said liquid container  12 . Said air valve set  122  connects to interior of said liquid container  12  to control air exhaust of said liquid container  12 ; said water plug  12121  is sealed on one end of said water inlet  1211 . 
         [0029]    First inject air into said gas container  11  via air valve set  111 . Volume of said gas container  11  will increase due to pressure increase inside said gas container  11  and then volume of said liquid container  12  will reduce as shown in  FIG. 3 . 
         [0030]    Open said water plug  12121  to allow user to add certain amount of liquid or colloid into said liquid container  12  via said water inlet  1211  in accordance with user&#39;s demand; liquid or colloid injected should not exceed level of said water inlet  1211  as shown in  FIG. 4 . Meanwhile, on top of liquid or colloid inside said liquid container  12  is filled with air. 
         [0031]    Close said water plug  12121  and open said air valve set  122 . Inject air into gas container  11  via said air valve set  111 . Volume of said gas container  11  will increase due to pressure increase and compress volume of said liquid container  12 . The level of liquid or colloid inside said liquid container  12  will rise under compression and air inside said liquid container  12  will exhaust via said air valve set  122  until liquid or colloid starts to flow out of said liquid container  12  via said air valve set  122 , which means air inside liquid container  12  is completed exhausted. Meanwhile, stop injecting air into gas container  11  via said air valve set  111  and close said valve set  122  to completely seal said liquid container  12  as shown in  FIG. 5 . 
         [0032]    Said liquid container  12  is completely filled with demanded amount of liquid or colloid in accordance with user&#39;s training need to obtain desired tactile feel. Liquid or colloid and air inside said inner bladder  10  can be completely exhausted via said water inlet set  121  and air valve set  111  respectively thus said inner bladder structure is easily to be stored and moved. 
         [0033]    If hardness of said inner bladder  10  is desired to be increased, some air can be injected into liquid container  12  via said air valve set  122 . 
         [0034]    Please refer to  FIGS. 6 ,  7 ,  8 ,  9 ,  10 , and  11  for three-dimensional views of various embodiments of inner bladder structure of present invention. 
         [0035]    As shown in  FIG. 6 , said liquid container  12  comprises at least one water inlet set  121  placed on top side of said liquid container  12 . Aside from liquid or colloid injection and drain functions, said water inlet set  121  also provides air exhaust function. Liquid or colloid can be injected to fill said liquid container  12 . Other characteristics are the same as shown in  FIG. 2 . 
         [0036]    As shown in  FIG. 7 , said liquid container  12  comprises at least one water inlet set  121  placed on top side of said liquid container  12  and at least one air valve set  122 . Liquid or colloid can be injected to fill said liquid container  12 . Other characteristics are the same as shown in  FIG. 2 . 
         [0037]    As shown in  FIG. 8 , said liquid container  12  comprises at least one water inlet set  121  placed on top side of said liquid container  12 . Said water inlet set  121  further comprises one water inlet  1211  and one sealing section  1212 . Said sealing section  1212  is a manual water valve  12122 . Aside from liquid or colloid injection and drain functions, said water inlet set  121  also provides air exhaust function. Liquid or colloid can be injected to fill said liquid container  12 . Other characteristics are the same as shown in  FIG. 2 . 
         [0038]    As shown in  FIG. 9 , said liquid container  12  comprises at least one water inlet set  121  placed on top side of said liquid container  12  and at least one air valve set  122 . Said water inlet set  121  further comprises one water inlet  1211  and one sealing section  1212 . Said sealing section  1212  is a manual water valve  12122 . Liquid or colloid can be injected to fill said liquid container  12 . Air inflation or exhaust via said air valve set  122  can adjust hardness of said inner bladder  10 . Other characteristics are the same as shown in  FIG. 2 . 
         [0039]    As shown in  FIGS. 10 and 11 , said inner bladder  10  of  FIG. 7  is installed with one additional fixed-shape ring  13  on top part of said inner bladder  10  and fixed on said liquid container  12  to shape the top of said liquid container  12 . 
         [0040]    Although the present invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the invention as hereinafter claimed.