Abstract:
An adjustable punching bag includes an outer jacket bag and an inner bag set received in the outer bag. The inner bag set contains core stuffing, in which the content and kind of the stuffing can be adjusted to change the weight of the entire punching bag for meeting different practicing needs of users. Further, it is convenient to pack, store all parts thereof to lower delivery cost.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the Invention  
         [0002]     The present invention is related to an adjustable punching bag and particularly to a punching bag, which provides adjustable weight and hardness and is able to be folded for packing, storing and delivering conveniently.  
         [0003]     2. Brief Description of the Related Art  
         [0004]     The punching bag is frequently used during practicing skill of art of attack and defense. In order to meet different personal needs, punching bags in different weights are available for being chosen as desired. However, it is known that a lot of punching bags have to be prepared and the volumes of the punching bags are huge such that problems with regard to storage, packing and delivery in addition to handling cost are worth us to care.  
         [0005]     As the foregoing, the conventional punching bag occupies limited space, requires high delivery cost. And, it is unable for the user to adjust weight thereof suitable for personal practice habit and load carrying ability. How to solve the preceding problems is a subject has to be overcome.  
       SUMMARY OF THE INVENTION  
       [0006]     An object of the present invention is to provide an adjustable punching bag to improve deficiencies of being not possible for weight adjusting, packing and storing.  
         [0007]     Another object of the present invention is to provide an adjustable punching bag, with which it is not necessary for manufactures to fabricate punching bags in different weights and to worry about unsold punching bags in stocks.  
         [0008]     In order to achieve the preceding objects, the adjustable punching bag of the present invention includes an inner bag set and an outer jacket bag. The outer jacket bag provides an inlet for receiving the inner bag set. The inner bag set includes a first inner bag, a second inner bag and multiple daughter bags. The second inner bag and the daughter bags are filled with stuffing and placed in the outer jacket bag sequentially. The stuffing provides with gradients in different densities for controlling weight of the entire punching bag. The stuffing can be liquid, solid or gas. Liquid can be water, liquids in different specific weights or curdled glue formed of water with agent. Solid can be plastic air bag or lead blocks, which affect weight. Gas is capable of occupying space for decreasing weight. Even more, the stuffing can be any mixture of liquid, gas and solid. Thus, the weight of the punching bag is under control and the required weight can be obtained and precise training of skill with regard to art of attack and defense can be achieved. The cap knob at the top of the second inner bag can be removed to take out the daughter bags or the cap knob at the bottom of the second inner bag can be removed to release the stuffing completely. Further, the outer jacket bag and the inner bag set can be folded and stored in a box simply for being carried with the user conveniently. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0009]     The detail structure, the applied principle, the function and the effectiveness of the present invention can be more fully understood with reference to the following description and accompanying drawings, in which:  
         [0010]      FIG. 1  is a perspective view of an adjustable punching bag according to the present invention;  
         [0011]      FIG. 1A  is a perspective view similar to  FIG. 1  illustrating the adjustable punching bag of the present invention being in a state of using less chambers;  
         [0012]      FIG. 2  is a perspective view illustrating the first inner bag and the second inner bag of an adjustable punching bag according to the present invention;  
         [0013]      FIG. 2A  is a perspective view similar to  FIG. 2  illustrating the first inner bag and the second inner bag of an adjustable punching bag according to the present invention being in a state of using less chambers;  
         [0014]      FIG. 3  is a perspective view illustrating the second inner bag of the adjustable punching bag according to the present invention;  
         [0015]      FIG. 4  is a sectional view of an adjustable punching bag according to the present invention;  
         [0016]      FIG. 5  is another illustrating sectional view of an adjustable punching bag according to the present invention illustrating the punching bag being in use;  
         [0017]      FIG. 5A  is a top view of the first inner bag;  
         [0018]      FIG. 5B  is a top view of a soft rubber pad being attached to the second inner bag;  
         [0019]      FIG. 5C  is a plan view illustrating the state of using less chambers; and  
         [0020]      FIG. 6  is a perspective view illustrating all parts of the adjustable punching bag according to the present invention. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0021]     Referring to FIGS.  1  to  3 , an adjustable punching bag apparatus of the present invention includes an inner bag set and an outer jacket bag  30 . The outer jacket bag  30  provides several pieces of metal chains  31  and a tying cord  32  at the upper end thereof. The inner bag set includes a first inner bag  10 , a second inner bag  20  and a plurality of daughter bags  23 .  
         [0022]     Wherein, the outer jacket bag  30  receives the inner bag set and the metal chains  31  is used for hanging the outer jacket bag  30 . The tying cords  31  are used for closing the opening of the outer jacket bag  30 .  
         [0023]     Referring to  FIG. 5A  in company with  FIG. 2  again, the first inner bag  10  is composed of a plurality of chambers  12  and each of the chambers  12  is injected with gas via a gas hole  121  till being fully expanded. Alternatively, each of the chambers  12  provides an opening at the top thereof for filling foam sealing agent or tiny polystyrene foam balls to expand as a bag with increased hardness. In case of the foam sealing agent being used, less air chambers are needed as shown in  FIGS. 1A, 2A  and  5 C. Further, a soft rubber pad  13  is placed at the bottom of the first inner bag  10  for supporting the weight of the second inner bag  20 .  
         [0024]     Referring to  FIG. 4  in company with  FIG. 3 , the second inner bag  20  has an inlet at the upper end thereof for receiving stuffing and daughter bags  23  and a cap knob  22  is joined to the inlet by way of supersonic welding. The lower end of the second bag  20  is joined with a discharge hole  21  by way of the supersonic welding for discharging the stuffing and regulating weight thereof and another cap knob is provided at the discharge hole  21 . In order to facilitate operation for opening and closing of the cap, a recess type handle  221  is provided at the cap as shown in  FIGS. 4 and 5 .  
         [0025]     Referring to  FIGS. 5, 5A  and  5 B, when the adjustable type punching bag of the present invention is in use, gas is injected into the chamber  12  in the first inner bag  10  via the gas hole  121  as shown in  FIG. 5A  to fully expand the first inner bag  10  and the first inner bag  10  is received in the outer bag  30 . The soft rubber pad  13  is disposed between the first inner bag  10  and the second inner bag  20  as shown in  FIG. 5B  to bear the weight of the second inner bag  20 . Further, the soft rubber pad  13  has a central hole  131  for being closed by the cap knob  21  such that the liquid in the second inner bag  20  can be released via the central hole  131 . Then, the second inner bag  20  is received in the first inner bag  10  and water L is poured into the second bag  20  to increase the overall weight of the punching bag. If the second inner bag  20  is unable to fill up the preset weight of water, a plurality of daughter bags  23  are filled with gas and placed in the second inner bag  20  to allow the water L in the second inner bag  20  distributing evenly without forming the upper space of the second inner bag  20  being soft caused by lacking the water L. Besides, the daughter bags  23  can be stuffed with higher density material to increase the weight of the punching bag such that the weight of the punching bag is capable of being under control.  
         [0026]     It is appreciated that the adjustable punching bag of the present invention is to change the weight of the whole punching bag by means of changing quantity and kind of the stuffing in the inner bags and there is no restriction to limit the quantity and the kind of the used stuffing and it can be mixed based on the need of the user. Further, the cap knob  21  at the bottom of the second inner bag  20  is opened first to discharge the water L in the inner bag  20  after the punching bag has been done completely. Then, the cap knob  22  is opened and the daughter bags  23  are taken out with the gas in the daughter bags  23  being released. Thus, all the bags are folded and placed in a box B for storage and being carried with the user. In case of the soft bags being used, the box B can be reduced in size for being stored, packed and delivered more conveniently.  
         [0027]     While the invention has been described with referencing to a preferred embodiment thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention, which is defined by the appended claims.