Abstract:
An extra-long air-water sandbag includes an inner bladder and an external bag. The external bag is a bag to hold the inner bladder and covers the external of the inner bladder. The inner bladder further includes an inner and outer layer container set which includes a gas container and a liquid container, and an extension layer gas container which is a bladder for containing gas and housed at the top, bottom or top and bottom thereof to increase the total length of space of gas container of the punching bag. As the length of gas container is increased, combat training for the feet is hence achieved.

Description:
BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to an extra-long air-water sandbag, particularly one that with inner bladder suitable for both liquid and gas filler and that the space of total gas container is larger than that of total liquid container. 
     Description of Prior Arts 
     Conventional inner bladder is a closed bladder using solid (such as sand), liquid (such as water), or gas (such as air) as filler and placed inside one external bag. 
     It is easy and cheap to obtain said filler; however, the weight of punching bag impacts the training effect. When solid is used as filler in inner bladder, the weight of punching bag is heavy and cannot be easily moved and storage would be difficult. When liquid is solely used as filler in inner bladder, the heavy weight of punching bag would result in poor training effect. When gas is used as filler in inner bladder, the punching bag is generally too light in weight and requires other materials to fix it in place, thus result in poor training effect. 
     In addition, for conventional punching bag structure, be it adopting solid, liquid, or gas as filler, there is only one tactile feel. When filling with solids, punching bag gives a firm texture while filling liquids adds few softness and resilience. When filling with gas, punching gas is even more resilient. However, none of the foregoing fillers may be adjusted in the very same structure to create different texture to satisfy user&#39;s different training demand. 
     In addition, conventional punching bag is only for combat training of hands and cannot train for feet combats. If the punching bag is to be used for both hand and feet combat trainings, the length of said inner bladder should be extended. In order to do that, the weight of the said inner bladder is increased and therefore shortening the life of the inner bladder structure. 
     Thus, there are foregoing drawbacks of conventional elastic structure of physical training device in prior art to be improved. 
     SUMMARY OF THE INVENTION 
     To overcome the existing problems of prior art, present invention provides an extra-long air-water sandbag that can be used for both hand and feet combat training; and the weight of inner bladder can be adjusted for better combat training effect. 
     The present invention discloses an extra-long air-water sandbag that comprises one inner bladder and one external bag. 
     Wherein, said external bag is the bag to hold the said inner bladder and covers the external of the said inner bladder. The said inner bladder further comprises one inner and outer layer container set and at least one separation layer gas container. The said separation layer gas container is a bladder for containing gas and housed at the top, bottom or top and bottom of the said inner and outer layer container set and fixedly connect or couple to the top, bottom or top and bottom of the said inner and outer layer container set to increase the total length of space of gas container of the punching bag. As the length of gas container is increased, combat training for the feet can be hence achieved. The inner and outer layer container set further comprises one gas container and one liquid container. The said gas container is a bladder for gas storage placed in inner compartment of said inner and outer layer container set. The said liquid container is a bladder for liquid storage placed in outer compartment of said gas container. Or, the said gas container is a bladder for gas storage placed in outer compartment of said inner and outer layer container set; and the said liquid container is a bladder for liquid storage placed in inner compartment of said gas container. 
     Preferably, said external bag has one waterproof layer housed on the inner side and coupled to the top of the said external bag to prevent liquid or colloid contained in the said liquid container from outflow to outside of the sandbag due to breakage. The said external bag has one cover located on top of the said external bag and bounded to the top of said external bag to protect the inner bladder and extend its life. Said gas container comprises at least one air valve set installed on one end of said gas container and connects to interior of said gas container. The said air valve set is used to change the pressure inside the said gas container to further adjust the volume of said liquid container. Or the said gas container may equip with at least one air-vent on one end of said gas container and connects to interior of said separation layer gas container. The said air-vent is used to allow air circulation between the said separation layer gas container and said gas container. Or the said gas container may equip at least one air valve set and at least one air-vent. The said air valve set is installed on one end of said gas container and connects to interior of the said gas container to change the pressure inside the gas container. The air-vent is located on the other end of the said gas container and connects to the interior of the said separation layer gas container so air circulation is allowed between the said gas container and said separation layer gas container. The said separation layer gas container may equip with at least one air valve set on one end of the said separation layer gas container and connects to the interior of said separation layer gas container to change the pressure inside said separation layer gas container. Said air valve is selected from either inflation valve for balls or air bed valve. The said liquid container has at least one water inlet set located on the side or top of the said liquid container and connects to the interior of said liquid container for injecting liquid or colloid to adjust the weight of said inner bladder. As the weight of inner bladder is adjusted, different user demand can be reached for better combat training effect. 
     Aside from foregoing formation and function of the extra-long air-water sandbag described above, said liquid container comprises additionally at least one valve set installed on top end or top-sided of said liquid container and connects to interior of said liquid container. Firmness of said inner bladder can be adjusted by air inflation or exhaustion via said valve set, and thus to adjust punching texture. Moreover, said inner bladder additionally 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 created due to insufficient pressure on top of said liquid container. The fixed-shape ring also serves to make the liquid container more artistic. The said inner bladder further comprises at least one pad housed between the said inner and outer layer container set and said separation layer gas container. The said pad can fill the space between external side of said inner and outer layer container set  11  and said external bag. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWING 
         FIG. 1  is a three-dimensional view of embodiment A of present invention. 
         FIG. 2  is a three-dimensional view of embodiment B of present invention. 
         FIG. 3  is a three-dimensional view of the inner bladder of embodiment C of present invention. 
         FIG. 4  is a three-dimensional view of the inner bladder of embodiment D of present invention. 
         FIG. 5  is a three-dimensional view of the inner bladder of embodiment E of present invention. 
         FIG. 6  is a three-dimensional view of the inner bladder of embodiment F of present invention. 
         FIG. 7  is a three-dimensional view of the inner bladder of embodiment G of present invention 
         FIG. 8  is a three-dimensional view of embodiment H of present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The presently preferred embodiment and related aspects of the invention will now be described with reference to the accompanied drawings. 
     Please refer to  FIGS. 1, 2, and 8  for the three-dimensional views of different embodiments of the present invention. Please refer to  FIGS. 3, 4, 5, 6, and 7  for the three-dimensional views of inner bladder of different embodiments of the present invention; wherein said invention comprise one inner bladder  10  and one external bag  20 . 
     Wherein, said external bag  20  is the bag to hold the said inner bladder  10  and covers the external of the said inner bladder  10 . The said inner bladder  10  further comprises one inner and outer layer container set  11  and at least one extension layer gas container  12 . The said inner and outer layer container set  11  further comprises one gas container  111  and one liquid container  112 . The said gas container  111  is a bladder for gas storage. The said liquid container  112  is a bladder for liquid or colloid storage. The said extension layer gas container  12  is a bladder for gas storage. 
     As shown in  FIG. 1 , said external bag  20  has one waterproof layer  21  housed on the inner side and coupled to the top of the said external bag  20 . The said external bag  20  has one cover  22  located on top of the said external bag  20  and bounded to the top of said external bag  20 . Said gas container  111  located on the inner layer of said inner and outer layer container set  11 ; said liquid container  112  located on the external side of said gas container  11 . The said separation layer gas container  12  located on the bottom of said inner and outer layer container set  11  and fixed on the bottom of said inner and outer layer container set  11 . Said gas container  111  comprises at least one air valve set  13  installed on one end of said gas container  111  and connects to interior of said gas container  111 . Said air valve set  13  is either inflation valve for balls  131  or air bed valve  132 . Said gas container  111  equips with at least one air-vent  14  on the bottom of said gas container  111  and connects to interior of said extension layer gas container  12 . The said liquid container  112  has at least one water inlet set  1121  with water plug located on the top of said liquid container  112  and connects to the interior of said liquid container  112 . Said liquid container  112  has at least one air valve set  1122  on the top of said liquid container  112  and connects to the interior of said liquid container  112 . Said inner and outer layer container set  11  has one fixed-shape ring  113  located on the top compartment of said inner and outer layer container set  11  and connects to the said liquid container  112 . 
     First inject air into said gas container  111  via air valve set  13 ; and air will be filled into the said extension layer gas container  12  via the said air-vent  14 . Volume of said gas container  111  will increase due to pressure increase inside said gas container  111  and then volume of said liquid container  112  will be reduced. 
     Open said water inlet set  1121  to allow user to add certain amount of liquid or colloid into said liquid container  112  in accordance with user&#39;s demand. Meanwhile, on top of liquid or colloid inside said liquid container  112  is filled with air. 
     Finally, close said water inlet set  1121  and open said valve set  1122  to inject air into gas container  111  via said air valve set  13 ; and air will be filled into the said extension layer gas container  12  via the said air-vent  14 . Volume of said gas container  111  will expand due to increase of pressure and compress volume of said liquid container  112 . The level of liquid or colloid inside said liquid container  112  will rise due to compression and air inside said liquid container  112  will be exhausted via said valve set  1122  until liquid or colloid drained out of said liquid container  112  via said valve set  1122 , meaning air inside liquid container  112  is completed exhausted. Meanwhile, stop injecting air into gas container  111  via said air valve set  13  and close said valve set  1122  to completely seal said liquid container  112 . Then cover the external bag  20  on the external side of said inner bladder  10 . 
     Said liquid container  112  is completely filled with demanded amount of liquid or colloid in accordance with user&#39;s training need to obtain desired texture of punching at practice. Liquid or colloid and air inside said inner bladder  10  all can be exhausted via said water inlet set  1121  and air valve set  13  thus said inner bladder  10  is easier to be stored and moved. 
     If firmness of said inner bladder  10  is desired to be increased, air can be injected into said liquid container  112  via said valve set  1122 . 
     As shown in  FIG. 2 , said gas container  111  located on the inner layer of said inner and outer layer container set  11 ; said liquid container  112  located on the external side of said gas container  11 . The said extension layer gas container  12  located on the bottom of said inner and outer layer container set  11  and fixed on the bottom of said inner and outer layer container set  11 . Place one pad  15  between bottom of said inner and outer layer container set  11  and said extension layer gas container  12 . Said pad  15  can fill the space between external side of bottom of said inner and outer layer container set  11  and said external bag  20 . Said gas container  111  comprises at least one air valve set  13  installed on one end of said gas container  111  and connects to interior of said gas container  111 . Said air valve set  13  is either inflation valve for balls  131  or air bed valve  132 . The said liquid container  112  has at least one water inlet set  1121  with water valve located on the top of said liquid container  112  and connects to the interior of said liquid container  112 . Said liquid container  112  has at least one air valve set  1122  on the top of said liquid container  112  and connects to the interior of said liquid container  112 . Said extension layer gas container  12  has at least one air valve set  13  located on one end of said separation layer gas container  12  and connects to the said liquid container  112 . 
     First inject air into said extension layer gas container  12  via air valve set  13  of said extension layer gas container  12 . Pressure inside said extension layer gas container  12  will increase to meet the training needs. In addition, inject air into said gas container  111  via air valve set  13 . Volume of said gas container  111  will increase due to pressure increase inside said gas container  111  and then volume of said liquid container  112  will be reduced. 
     Open said water inlet set  1121  to allow user to add certain amount of liquid or colloid into said liquid container  112  in accordance with user&#39;s demand. Meanwhile, on top of liquid or colloid inside said liquid container  112  is filled with air. 
     Finally, close said water inlet set  1121  and open said valve set  1122  to inject air into gas container  111  via said air valve set  13 . Volume of said gas container  111  will expand due to increase of pressure and compress volume of said liquid container  112 . The level of liquid or colloid inside said liquid container  112  will rise due to compression and air inside said liquid container  112  will be exhausted via said valve set  1122  until liquid or colloid drained out of said liquid container  112  via said valve set  1122 , meaning air inside liquid container  112  is completed exhausted. Meanwhile, stop injecting air into gas container  111  via said air valve set  13  and close said valve set  1122  to completely seal said liquid container  112 . Then cover the external bag  20  on the external side of said inner bladder  10 . 
     Said liquid container  112  is completely filled with demanded amount of liquid or colloid in accordance with user&#39;s training need to obtain desired texture of punching at practice. Liquid or colloid and air inside said inner bladder  10  all can be exhausted via said water inlet set  1121  and air valve set  13  thus said inner bladder  10  is easier to be stored and moved. 
     If firmness of said inner bladder  10  is desired to be increased, air can be injected into said liquid container  112  via said valve set  1122 . 
     As shown in  FIG. 3 , add another said extension layer gas container  12  on top of the said inner and outer layer container set  11 . Place another said pad  15  between top of said inner and outer layer container set  11  and said another extension layer gas container  12 . Said pad  15  can fill the space between external side of top of said inner and outer layer container set  11  and said external bag  20 . Said water inlet set  1121  has concave water plug located on the top of said liquid container  112  and connects to the interior of said liquid container  112 . The rest are the same as in  FIG. 2 . 
     As shown in  FIG. 4 , remove the said extension layer gas container  12  and said pad  15  located on bottom of said inner and outer layer container set  11 . The rest are the same as in  FIG. 3 . 
     As shown in  FIG. 5 , said gas container  111  located on the inner layer of said inner and outer layer container set  11 ; said liquid container  112  located on the external side of said gas container  11 . The said separation layer gas container  12  located on the top and bottom of said inner and outer layer container set  11  and fixed on the top and bottom of said inner and outer layer container set  11 . Said extension layer gas container  12  has at least one air valve set  13  located on one end of said extension layer gas container  12  and connects to the said liquid container  112 . Said air valve set  13  is either inflation valve for balls  131  or air bed valve  132 . Said gas container  111  has multiple air-vents  14  on the top and bottom of said gas container  111  and connects to interior of said extension layer gas container  12 . Said liquid container  112  has at least one water inlet set  1121  with water plug located on the top of said liquid container  112  and connects to the interior of said liquid container  112 . Said liquid container  112  has at least one air valve set  1122  on the top of said liquid container  112  and connects to the interior of said liquid container  112 . 
     First inject air into said extension layer gas container  12  via air valve set  13 ; and air will be filled into the said gas container  111  and said another extension layer gas container  12  via the said air-vent  14 . Volume of said gas container  111  will increase due to pressure increase inside said gas container  111  and then volume of said liquid container  112  will be reduced. 
     Open said water inlet set  1121  to allow user to add certain amount of liquid or colloid into said liquid container  112  in accordance with user&#39;s demand. Meanwhile, on top of liquid or colloid inside said liquid container  112  is filled with air. 
     Finally, close said water inlet set  1121  and open said valve set  1122  to inject air into said extension layer gas container  12  via said air valve set  13 ; and air will be filled into the said air container  111  and another said extension layer gas container  12  via the said air-vent  14 . Volume of said gas container  111  will expand due to increase of pressure and compress volume of said liquid container  112 . The level of liquid or colloid inside said liquid container  112  will rise due to compression and air inside said liquid container  112  will be exhausted via said valve set  1122  until liquid or colloid drained out of said liquid container  112  via said valve set  1122 , meaning air inside liquid container  112  is completed exhausted. Meanwhile, stop injecting air into said extension layer gas container  12  and said gas container  111  via said air valve set  13  and close said valve set  1122  to completely seal said liquid container  112 . Insert one filler part  16 . The said filler part  16  is positioned on one side of the said extension layer gas container  12  to make the said extension layer gas container  12  fit more closely to the said external bag  20 . Then place the said inner bladder  10  upright and cover the external bag  20  on the external side of said inner bladder  10 . 
     Said liquid container  112  is completely filled with demanded amount of liquid or colloid in accordance with user&#39;s training need to obtain desired texture of punching at practice. Liquid or colloid and air inside said inner bladder  10  all can be exhausted via said water inlet set  1121  and air valve set  13  thus said inner bladder  10  is easier to be stored and moved. 
     If firmness of said inner bladder  10  is desired to be increased, air can be injected into said liquid container  112  via said valve set  1122 . 
     As shown in  FIG. 6 , the said extension layer gas container  12  is one that located on top of the said inner and outer layer container set  11 . Said gas container  111  has at least one air-vent  14  located on top of the said gas container  111  and connects to the interior of said extension layer gas container  12 . The rest are the same as in  FIG. 5 . 
     As shown in  FIG. 7 , Said gas container  111  located on the inner layer of said inner and outer layer container set  11 ; said liquid container  112  located on the external side of said gas container  11 . The said extension layer gas container  12  located on the top of said inner and outer layer container set  11  and fixed on the top of said inner and outer layer container set  11 . Said extension layer gas container  12  comprises at least one air valve set  13  installed on the top of said extension layer gas container  12  and connects to interior of said extension layer gas container  12 . Said air valve set  13  is either inflation valve for balls  131  or air bed valve  132 . Said gas container  111  equips with at least one air-vent  14  on the top of said gas container  111  and connects to interior of said extension layer gas container  12 . The said liquid container  112  has at least one water inlet set  1121  with water plug located on the side of said liquid container  112  and connects to the interior of said liquid container  112 . Said liquid container  112  has at least one air valve set  1122  on the side of said liquid container  112  and connects to the interior of said liquid container  112 . 
     First inject air into said extension layer gas container  12  via air valve set  13 ; and air will be filled into the said gas container  111  via the said air-vent  14 . Volume of said gas container  111  will increase due to pressure increase inside said gas container  111  and then volume of said liquid container  112  will be reduced. 
     Then, place said inner bladder  10  horizontally. Said water inlet set  1121  and said air valve set  1122  face upward. Open said water inlet set  1121  to allow user to add certain amount of liquid or colloid into said liquid container  112  in accordance with user&#39;s demand. Meanwhile, on top of liquid or colloid inside said liquid container  112  is filled with air. 
     Finally, close said water inlet set  1121  and open said valve set  1122  to inject air into said extension layer gas container  12  via said air valve set  13 ; and air will be filled into the said air container  111  via the said air-vent  14 . Volume of said gas container  111  will expand due to increase of pressure and compress volume of said liquid container  112 . The level of liquid or colloid inside said liquid container  112  will rise due to compression and air inside said liquid container  112  will be exhausted via said valve set  1122  until liquid or colloid drained out of said liquid container  112  via said valve set  1122 , meaning air inside liquid container  112  is completed exhausted. Meanwhile, stop injecting air into said extension layer gas container  12  and said gas container  111  via said air valve set  13  and close said valve set  1122  to completely seal said liquid container  112 . Then place the said inner bladder  10  upright and cover the external bag  20  on the external side of said inner bladder  10 . 
     Said liquid container  112  is completely filled with demanded amount of liquid or colloid in accordance with user&#39;s training need to obtain desired texture of punching at practice. Liquid or colloid and air inside said inner bladder  10  all can be exhausted via said water inlet set  1121  and air valve set  13  thus said inner bladder  10  is easier to be stored and moved. 
     If firmness of said inner bladder  10  is desired to be increased, air can be injected into said liquid container  112  via said valve set  1122 . 
     As shown in  FIG. 8 , said external bag  20  has one waterproof layer  21  housed on the inner side and coupled to the top of the said external bag  20 . Said external bag  20  has one cover  22  located on top of the said external bag  20  and bounded to the top of said external bag  20 . Said gas container  111  located on the outer layer of said inner and outer layer container set  11 ; said liquid container  112  located on the inner side of said gas container  11 . The said extension layer gas container  12  located on the bottom of said inner and outer layer container set  11  and fixed on the bottom of said inner and outer layer container set  11 . Said gas container  111  comprises at least one air valve set  13  installed on one end of said gas container  111  and connects to interior of said gas container  111 . Said air valve set  13  is either inflation valve for balls  131  or air bed valve  132 . Said gas container  111  equips with at least one air-vent  14  on the bottom of said gas container  111  and connects to interior of said extension layer gas container  12 . The said liquid container  112  has at least one water inlet set  1121  with water plug located on the top of said liquid container  112  and connects to the interior of said liquid container  112 . 
     First inject air into said gas container  111  via air valve set  13 ; and air will be filled into the said extension layer gas container  12  via the said air-vent  14 . Volume of said gas container  111  will increase due to pressure increase inside said gas container  111  and then volume of said liquid container  112  will be reduced. 
     Open said water inlet set  1121  to allow user to add certain amount of liquid or colloid into said liquid container  112  in accordance with user&#39;s demand. Meanwhile, on top of liquid or colloid inside said liquid container  112  is filled with air. 
     Finally, close said water inlet set  1121  and seal the said liquid container  112 . Inject air into gas container  111  via said air valve set  13 ; and air will be filled into the said extension layer gas container  12  via the said air-vent  14 . Volume of said gas container  111  will expand due to increase of pressure and compress volume of said liquid container  112 . The level of liquid or colloid inside said liquid container  112  will rise due to compression and pressure increases when the air inside said liquid container  12  is compressed. Meanwhile, stop injecting air into gas container  111  via said air valve set  13  and close said valve set  1122  to completely seal said liquid container  112 . Then cover the external bag  20  on the external side of said inner bladder  10 . 
     Said liquid container  112  is completely filled with demanded amount of liquid or colloid in accordance with user&#39;s training need to obtain desired texture of punching at practice. Liquid or colloid and air inside said inner bladder  10  all can be exhausted via said water inlet set  1121  and air valve set  13  thus said inner bladder  10  is easier to be stored and moved. 
     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.