Patent Publication Number: US-11648452-B1

Title: Auxiliary tool for barbells and anti-slip method for barbells during use

Description:
BACKGROUND OF THE INVENTION 
     1. Technical Field 
     The invention relates to an auxiliary tool for barbells and an anti-slip method for barbells during use. 
     2. Description of Related Art 
     Barreled barbells are fitness equipment which fulfills training by lifting a barbell bar inserted into a barrel, and different muscle groups can be trained through different lifting motions. The barreled barbells have good performance in training core strength, explosive force of limbs and physical coordination. According to existing barreled barbells, the barrel is generally fixed on the ground or the wall, after being inserted into the barrel, the barbell bar can be lifted only by a few angles and can be lifted merely in the vertical direction, and the trained positions are limited, so using is inconvenient. 
     BRIEF SUMMARY OF THE INVENTION 
     In view of the aforementioned defects, the objective of the invention is to provide an auxiliary tool for barbells and an anti-slip method for barbells during use. 
     To fulfill the above objective, the invention provides an auxiliary tool for barbells, comprising a sleeve which is composed of a first sleeve, a second sleeve, a third sleeve, a first sleeve wall, a second sleeve wall and a third sleeve wall, wherein the first sleeve wall is sequentially connected to the second sleeve wall and the third sleeve wall to form a complete sleeve cavity, the first sleeve wall and the third sleeve wall cover at least one part of a barbell bar, and the second sleeve wall expands outwards in the sleeve cavity to form an inner cavity; when the barbell bar is sequentially inserted into the first sleeve, the second sleeve and the third sleeve from a sleeve opening, the inner cavity is filled with gas to form a crush-resistant cavity; and protrusions are formed in an inner wall of the third sleeve, and a vent hole is formed in a bottom wall of the third sleeve. 
     As a further improvement of the invention, the first sleeve wall, the second sleeve wall and the third sleeve wall are formed integrally. 
     As a further improvement of the invention, a wall thickness of the first sleeve wall  21  increases gradually towards the second sleeve wall  22 . 
     As a further improvement of the invention, the sleeve is made of an elastic material, which may be rubber or other high-elasticity polymer materials. 
     As a further improvement of the invention, anti-slip lines are disposed on an outer wall of the sleeve, and the anti-slip lines are honeycomb-shaped or striped. 
     As a further improvement of the invention, an air hole communicated with the vent hole in the bottom wall of the third sleeve is formed in an outer wall of the sleeve, and an inner diameter of the air hole is less than that of the vent hole. 
     To fulfill the above objective, the invention further provides an anti-slip method for barbells during use. The anti-slip method for barbells during use comprises: providing an anti-slip bushing, disposing the anti-slip bushing around an end of a barbell bar, and forming a pressurizing cavity in a middle section of the anti-slip bushing; when the barbell bar is inserted into a bottom of the anti-slip bushing, filling the pressurizing cavity with gas to enable a portion, corresponding to the pressurizing cavity, of an outer surface of the anti-slip bushing contact a ground, such that the end of the barbell bar is prevented from directly applying a pressure to the anti-slip bushing; and disposing anti-slip lines on the outer surface of the anti-slip bushing to increase the friction between the anti-slip bushing and the ground, such that an anti-slip effect is realized. 
     Compared with the prior art, the invention has the following beneficial effects: the auxiliary tool for barbells is small in size and convenient to carry and use and can be disposed around a barbell bar to serve as a fulcrum; the anti-slip lines on the outer surface of the auxiliary tool make the friction between the auxiliary tool and the ground large, such that slipping is unlikely to happen; through the protrusions in the auxiliary tool, the barbell bar is unlikely to rotate or slide with respect to the tool when disposed in the tool; through the vent hole in the auxiliary tool, the barbell bar can be inserted into the auxiliary tool more easily; the crush-resistant cavity formed in the auxiliary tool can prevent the end of a barbell from directly applying a pressure to the auxiliary tool, such that trainers can make different lifting motions without being limited by the field; and the auxiliary tool does not need to be fixed on a wall or the ground, thus providing more training angles. 
    
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
         FIG.  1    is a three-dimensional view of an auxiliary tool for barbells according to the invention; 
         FIG.  2    is a front view of the auxiliary tool for barbells according to the invention; 
         FIG.  3    is a sectional view along A-A in  FIG.  2   ; 
         FIG.  4    is a schematic diagram of an anti-slip method for barbells during use according to the invention; 
         FIG.  5    is an enlarged view of part B in  FIG.  4   ; 
         FIG.  6    is a schematic diagram of the auxiliary tool for barbells and a barbell bar used together according to the invention. 
     
    
    
     In the figures:  1 , sleeve;  11 , first sleeve;  12 , second sleeve;  13 , third sleeve;  21 , first sleeve wall;  22 , second sleeve wall;  23 , third sleeve wall;  4 , sleeve cavity;  41 , inner cavity, pressurizing cavity;  5 , protrusion;  6 , vent hole;  7 , anti-slip line;  8 , air hole;  9 , anti-slip bushing;  10 , barbell bar;  11 , barbell weight. 
     DETAILED DESCRIPTION OF THE INVENTION 
     Embodiment 1: As shown in  FIG.  1   - FIG.  5   , an auxiliary tool for barbells comprises a sleeve  1  which is composed of a first sleeve  11 , a second sleeve  12 , a third sleeve  13 , a first sleeve wall  21 , a second sleeve wall  22  and a third sleeve wall  23 , wherein the first sleeve wall  21  is sequentially connected to the second sleeve wall  22  and the third sleeve wall  23  to form a complete sleeve cavity  4 , the first sleeve wall  21  and the third sleeve wall  23  cover at least one part of a barbell bar  10 , and the second sleeve wall  22  expands outwards in the sleeve cavity  4  to form an inner cavity  41 ; when the barbell bar  10  is sequentially inserted into the first sleeve  11 , the second sleeve  12  and the third sleeve  13  from a sleeve opening, the inner cavity  41  is filled with gas to form a crush-resistant cavity; and protrusions  5  are formed in an inner wall of the third sleeve  13 , and a vent hole  6  is formed in a bottom wall of the third sleeve  13 . 
     In a preferred embodiment of the invention, as shown in  FIG.  1   - FIG.  5   , the first sleeve wall  21 , the second sleeve wall  22  and the third sleeve wall  23  are formed integrally, which is a simple process, such that the auxiliary tool can be obtained quickly; the wall thickness of the first sleeve wall  21  increases gradually towards the second sleeve wall  22 , such that the structural strength of the joint of the first sleeve wall  21  and the second sleeve wall  22  can be improved, and the first sleeve wall  21  and the second sleeve wall  22  are not prone to breakage when the barbell bar  10  is inserted into the first sleeve wall  21  and the second sleeve wall  22 . 
     In a preferred embodiment of the invention, the sleeve  1  is made of rubber. By means of the properties of rubber, the damage of a barbell to the ground during training can be reduced, and the service life of the auxiliary tool for barbells is prolonged. When the barbell bar  10  is sequentially inserted into the first sleeve  11 , the second sleeve  12  and the third sleeve  13 , the inner cavity  41  forms the crush-resistant cavity full of gas, which can effectively buffer the pressure applied to the ground by the barbell during training to reduce damage to the ground and can also protect the end of the barbell bar  10  sleeved with the auxiliary tool. 
     In a preferred embodiment of the invention, anti-slip lines  7  are disposed on an outer wall of the sleeve  1 , and the anti-slip lines  7  are preferably honeycomb-shaped. The anti-slip lines  7  can effectively increase the friction between the auxiliary tool and the ground during training, such that slipping is avoided during training, which may otherwise affect the training effect; by adoption of the honeycomb-shaped structural design, a negative pressure will be formed in the honeycomb socket by the deformation of the axillary tool when the outer wall of the sleeve  1  contacts the ground when the auxiliary tool is used for training on the smooth ground, such that the auxiliary tool can be easily adhered to the smooth ground, and the phenomenon that slipping is likely to happen when the auxiliary tool is used for training on the smooth ground is avoided. 
     In a preferred embodiment of the invention, the protrusions  5  are formed on the inner wall of the third sleeve. The protrusions  5  can increase the friction of the end of the barbell bar  10  in the third sleeve  13 , such that the barbell bar  10  is prevented from rotating or slipping with respect to the auxiliary tool. The inner diameter of the air hole  8  is less than that of the vent hole  6 , such that gas in the sleeve  1  can be discharged more smoothly, and the barbell bar  10  can be inserted into the sleeve  1  more easily. 
     Embodiment 2: as shown in  FIG.  1   - FIG.  5   , an anti-slip method for barbells during use comprises the following steps: an anti-slip bushing  9  is provided and is disposed around one end of a barbell bar  10 , and a pressurizing cavity  41  is disposed on a middle section of the anti-slip bushing  9 ; when the barbell bar  10  is inserted into the bottom of the anti-slip bushing  9 , the pressurizing cavity  41  is full of gas to enable a portion, corresponding to the pressurizing cavity  41 , of the outer surface of the anti-slip bushing  9  contact the ground, such that the end of the barbell bar  10  is prevented from directly applying a pressure to the anti-slip bushing  9 ; and anti-slip lines  7  are disposed on the outer surface of the anti-slip bushing  9  to increase the friction between the anti-slip bushing  9  and the ground, such that an anti-slip effect is realized. 
     As shown in  FIG.  5   , during training, the auxiliary tool is placed on the ground as a fulcrum, and a proper barbell weight  10  is fixed to the other end, away from the auxiliary tool, of the barbell bar; and trainers hold the barbell bar  10  near the barbell weight  10  to make various lifting motions to fulfill the purpose of training. 
     Embodiment 3: According to the auxiliary tool in Embodiment 1, the sleeve  1  is made of silicone. 
     Embodiment 4: According to the auxiliary tool in Embodiment 1, the anti-slip lines  7  are striped. 
     The above embodiments are merely preferred ones of the invention, and are not used to limit the invention. Various modifications and changes can be made to the invention by those skilled in the art. Any amendments, equivalent substitutions and improvements made based on the spirit and principle of the invention should fall within the protection scope of the invention.