Inertial dumb bell

Abstract

An inertial dumb bell includes an outer barrel and an inner barrel is provided, wherein the outer barrel has two sealed ends, at least one first vent is disposed at a position of a barrel body of the outer barrel near a front end face, and at least one second vent is disposed at a position of the barrel body of the outer barrel near a back end face; the inner barrel having two sealed ends is accommodated in the outer barrel in a relatively slidable manner, at least one balance weight member is disposed in the inner barrel, and a length of the inner barrel is smaller than a distance between the first vent and the second vent. Therefore, when a user shakes the outer barrel, the inner barrel blocks the vents on one side of the outer barrel to form a buffering effect, so as to prevent the inner barrel from generating a strong impact on the outer barrel, thereby enhancing a training effect and ensuring the use safety.

1 . An inertial dumb bell, comprising:
 an outer barrel, having two sealed ends, comprising a barrel body, a front end face, and a back end face, wherein at least one first vent is disposed at a position of the barrel body near the front end face, and at least one second vent is disposed at a position of the barrel body near the back end face; and   an inner barrel, accommodated in the outer barrel in a relatively slidable manner, wherein front and back ends of the inner barrel are sealed, a length of the inner barrel is smaller than a distance between the first vent and the second vent, and at least one balance weight member is disposed in the inner barrel.   
     
     
         2 . The inertial dumb bell according to  claim 1 , further comprising a first buffer and a second buffer, wherein the first buffer is positioned between the front end face of the outer barrel and the front end of the inner barrel, and the second buffer is positioned between the back end face of the outer barrel and the back end of the inner barrel. 
     
     
         3 . The inertial dumb bell according to  claim 1 , wherein a front head sleeve and a back head sleeve are respectively fitted on the two ends of the outer barrel, a front end face is formed on the front head sleeve of the outer barrel, and a back end face is formed on the back head sleeve of the outer barrel. 
     
     
         4 . The inertial dumb bell according to  claim 1 , wherein the two ends of the inner barrel are respectively connected to a front pipe plug and a back pipe plug, for sealing the inner barrel. 
     
     
         5 . The inertial dumb bell according to  claim 2 , wherein a front head sleeve and a back head sleeve are respectively fitted on the two ends of the outer barrel, a front end face is formed on the front head sleeve of the outer barrel, and a back end face is formed on the back head sleeve of the outer barrel. 
     
     
         6 . The inertial dumb bell according to  claim 2 , wherein the two ends of the inner barrel are respectively connected to a front pipe plug and a back pipe plug, for sealing the inner barrel.