Movable leg cushion

Abstract

A movable leg cushion, mounted to the supporting leg of a carrier, and includes a housing, a movable inner sleeve, an elastic member, and at least one roller. The housing is, at its outside, fixedly arranged with a fixed connecting member; and is, at its inside, provided with an abutting portion, and with an accommodating space. The movable inner sleeve is slidably arranged in the accommodating space, and can move relative to the housing, such that the movable inner sleeve can move to a moving position or to a braking position. The elastic member is arranged in and between the housing and the movable inner sleeve. The at least one roller is pivotally arranged on the movable inner sleeve. When the movable inner sleeve is located in the moving position, the at least one roller is away from the abutting portion for a moving distance. However, when the movable inner sleeve is located in a braking position, the at least one roller presses against the abutting portion. When the carrier does not load in any specific weight, it can move back and forth freely; however, when the carrier has loaded in a specific weight, the carrier can brake automatically. This will make the carrier move conveniently and without the occurrence of noise; and in particular at a place where quietness is necessary, so as to realize the importance of the movable leg cushion.

1 . A movable leg cushion, mounted to the supporting leg of a carrier, comprising:
 a housing, fixedly arranged, at its outside, with a fixed connecting member, and provided, at its inside, with an abutting portion and with an accommodating space;   a movable inner sleeve, slidably arranged in the accommodating space, and moving relative to the housing, and moving to a moving position or to a braking position;   an elastic member, arranged in and between the housing and the movable inner sleeve; and   at least one roller, pivotally arranged on the movable inner sleeve;   wherein, when the movable inner sleeve is located in the moving position, the at least one roller is away from the abutting portion for a moving distance, and when the movable inner sleeve is located in a braking position, the at least one roller presses against the abutting portion.   
     
     
         2 . The movable leg cushion as claimed in  claim 1 , wherein the abutting portion relates to an arch-like structure. 
     
     
         3 . The movable leg cushion as claimed in  claim 1 , wherein the moving distance is 1 mm. 
     
     
         4 . A movable leg cushion, mounted to the supporting leg of a carrier, comprising:
 a housing, fixedly arranged, at its outside, with a fixed connecting member, and provided, at its inside, with an accommodating space;   a movable inner sleeve, slidably arranged in the accommodating space, and moving relative to the housing, and moving to a moving position or to a receiving position;   an elastic member, arranged in and between the housing and the movable inner sleeve; and   at least one roller, pivotally arranged on the movable inner sleeve;   wherein, when the movable inner sleeve is located in the moving position, the at least one roller extends over lower edge of the housing, and when the movable inner sleeve is located in the receiving position, the at least one roller does not extend over the lower edge of the housing and is received in the accommodating space.   
     
     
         5 . The movable leg cushion as claimed in  claim 1 , further comprising an outer member sleeved to the housing. 
     
     
         6 . The movable leg cushion as claimed in  claim 5 , further comprising a fastening nut threadedly fastened to the fixed connecting member, and positioned in between the outer member and the supporting leg. 
     
     
         7 . The movable leg cushion as claimed in  claim 1 , wherein the fixed connecting member relates to a setscrew. 
     
     
         8 . The movable leg cushion as claimed in  claim 1 , wherein the carrier relates to a chair or a stool. 
     
     
         9 . The movable leg cushion as claimed in  claim 4 , further comprising an outer member sleeved to the housing. 
     
     
         10 . The movable leg cushion as claimed in  claim 9 , further comprising a fastening nut threadedly fastened to the fixed connecting member, and positioned in between the outer member and the supporting leg. 
     
     
         11 . The movable leg cushion as claimed in  claim 4 , wherein the fixed connecting member relates to a setscrew. 
     
     
         12 . The movable leg cushion as claimed in  claim 4 , wherein the carrier relates to a chair or a stool.