Damper

Abstract

A damper has a body, a spindle and multiple beads. The body has a base with a through hole, a top cap with a through hole and a cavity defined in the body. The spindle is mounted inside the body and has a spindle body and a transverse post formed on the spindle body. The multiple beads are received inside the cavity in the body and abut the transverse post. The damper provides a friction by the transverse post abutting and moving over the beads, therefore, when the damper is mounted on a retractable device, the retracting rate of the retractable device may be adjusted conveniently by changing the amount of the beads.

1 . A damper comprising: 
 a body having 
 a base having a through hole,  
 a top cap mounted on the base and having a through hole corresponding to the through hole in the base, and  
 a cavity defined in the body between the base and the top cap,  
   a spindle mounted inside the body and having 
 a spindle body mounted inside the body having 
 a top end mounted inside the through hole in the top cap, and  
 a bottom post mounted through the through hole in the base,  
 
 a transverse post formed on the spindle body and received inside the cavity in the body, and  
   multiple beads received inside the cavity in the body and abutting with the transverse post.    
   
   
       2 . The damper as claimed in  claim 1 , wherein the multiple beads are made of steel.  
   
   
       3 . The damper as claimed in  claim 1 , wherein the multiple beads are made of plastic.  
   
   
       4 . A retractable railing device with a damper comprising 
 a post body having 
 a top,  
 a mounting hole defined in the top of the post body, and  
 a central cavity defined in the post body,  
   a spindle mounted inside the central cavity in the post body and having 
 a top mounted with and through the spiral spring, held inside the mounting hole in the post body and having a non-circular hole, and  
   a spiral spring mounted on the top of the spindle for providing a retractable force,    a railing rolled around the spindle, and    a damper mounted on the post body and having 
 a body having 
 a base mounted on the top of the post body and having a through hole,  
 a top cap mounted on the base and having a through hole corresponding to the through hole in the base, and  
 a cavity defined in the body between the base and the top cap,  
 
   a spindle mounted inside the body and having 
 a spindle body having 
 a top end mounted inside the through hole in the top cap,  
 a bottom post being a non-circular post, mounted through the through hole in the base, mounted in the non-circular hole in the top of the spindle,  
 
 a transverse post formed on the spindle body and received inside the cavity in the body, and  
 multiple beads received inside the cavity in the body and abutting the transverse post.  
   
   
   
       5 . The retractable railing device as claimed in  claim 4 , wherein the multiple beads are made of steel.  
   
   
       6 . The retractable railing device as claimed in  claim 4 , wherein the multiple beads are made of plastic.  
   
   
       7 . A retractable railing device with a damper comprising 
 a post body having 
 a top, and  
 a central cavity defined in the post body,  
   a spindle mounted inside the central cavity in the post body and having 
 a top end, and  
 a non-circular hole defined in the top end of the spindle,  
   a spiral spring mounted inside the post body for providing a retractable force,    a railing rolled around the spindle, and    a damper mounted inside the post body and having 
 a base mounted on the top of the post body and having a through hole,  
 a top cap mounted on the base and having a through hole corresponding to the through hole in the base,  
 a cavity defined between the top cap and the base,  
 a spindle mounted on the spindle in side the post body and passing through the spiral spring, having 
 a top end mounted inside the through hole in the top cap,  
 a bottom post being a non-circular post and mounted through the through hole in the base, mounted in the non-circular hole in the top end of the spindle, and  
 a transverse post formed on the spindle received inside the cavity in the body, and  
 
 multiple beads received inside the cavity in the body and abutting the transverse post.  
   
   
   
       8 . The retractable railing device as claimed in  claim 7 , wherein the multiple beads are made of steel.  
   
   
       9 . The retractable railing device as claimed in  claim 7 , wherein the multiple beads are made of plastic.