Bendable elastic cushion and adjustment mechanism thereof

Abstract

An adjustment mechanism of a bendable elastic cushion includes a base, a backrest frame, and one or more curved guide rails. The one or more curved guide rails are fixedly connected to the base, and the backrest frame is slidably connected to the one or more curved guide rails, so as to change an angle between the backrest frame and a horizontal plane by sliding the backrest frame along a direction in which the one or more curved guide rails extend.

What is claimed is: 
     
         1 . An adjustment mechanism of a bendable elastic cushion, comprising:
 a base,   a backrest frame, and   one or more curved guide rails, wherein:
 the one or more curved guide rails are fixedly connected to the base, and 
 the backrest frame is slidably connected to the one or more curved guide rails, so as to change an angle between the backrest frame and a horizontal plane by sliding the backrest frame along a direction in which the one or more curved guide rails extend. 
   
     
     
         2 . The adjustment mechanism of the bendable elastic cushion according to  claim 1 , comprising:
 one or more elastic locking members for fixing one or more relative positions of the backrest frame and the one or more curved guide rails, wherein:
 the one or more elastic locking members are configured to be switched from a locked state to an unlocked state due to an external force, 
 when the one or more elastic locking members are in the locked state, the backrest frame and the one or more elastic locking members are interlocked with each other in the direction in which the one or more curved guide rails extend, and 
 when the one or more elastic locking members are in the unlocked state, the backrest frame and the one or more elastic locking members are released from an interlocking connection in the direction in which the one or more curved guide rails extend. 
   
     
     
         3 . The adjustment mechanism of the bendable elastic cushion according to  claim 2 , wherein:
 each of the one or more elastic locking members comprises a positioning pin and a spring,   a first end of the spring abuts the base to form a fixed end,   a second end of the spring abuts the positioning pin to form a movable end, and   when the one or more elastic locking members are in the unlocked state, the positioning pin compresses the spring to accumulate an elastic reset force.   
     
     
         4 . The adjustment mechanism of the bendable elastic cushion according to  claim 3 , wherein:
 the one or more curved guide rails are two curved guide rails,   the two curved guide rails are arranged at intervals along a width direction of the base,   the one or more elastic locking members are two elastic locking members in a one-to-one correspondence with the two curved guide rails,   two sides of the positioning pins of the two elastic locking members facing each other are connected by a release rope, and   the release rope is configured to be pulled by a second external force to drive the positioning pins to compress the springs, so that the two elastic locking members are moved to be in the unlocked state.   
     
     
         5 . The adjustment mechanism of the bendable elastic cushion according to  claim 1 , wherein:
 the base comprises a first part configured to be placed on ground and a second part extending away from the first part, and   the second part has a clamping chamber for accommodating the one or more curved guide rails.   
     
     
         6 . The adjustment mechanism of the bendable elastic cushion according to  claim 4 , wherein:
 the backrest frame is in a door-shape, and   two vertical rods of the backrest frame are respectively slidably connected to the two curved guide rails.   
     
     
         7 . The adjustment mechanism of the bendable elastic cushion according to  claim 1 , wherein:
 the backrest frame comprises a walking mechanism that slides with the one or more curved guide rails.   
     
     
         8 . The adjustment mechanism of the bendable elastic cushion according to  claim 7 , wherein:
 the walking mechanism is located in the one or more curved guide rails and comprises one or more rollers that are matched with an inner walls of the one or more curved guide rails.   
     
     
         9 . The adjustment mechanism of the bendable elastic cushion according to  claim 7 , wherein:
 the walking mechanism is sleeved on outsides of the one or more curved guide rails, and   the walking mechanism comprises one or more first rollers cooperating with an upper surface of the one or more curved guide rails and one or more second rollers cooperating with a lower surface of the one or more curved guide rails.   
     
     
         10 . A bendable elastic cushion equipped with the adjustment mechanism according to  claim 1 . 
     
     
         11 . The bendable elastic cushion according to  claim 10 , comprising:
 a soft cushion, and   a plurality of elastic units arranged in an array, wherein:
 the plurality of elastic units are divided into a mattress area arranged on the base and a backrest area configured to move along with the backrest frame according to areas where the mattress area and the backrest area are located. 
   
     
     
         12 . The bendable elastic cushion according to  claim 11 , wherein:
 two adjacent rows of the plurality of elastic units respectively in the mattress area and the backrest area are connected by a center distance adjustment mechanism,   when the angle between the backrest frame and the horizontal plane is increased, the center distance adjustment mechanism drives a center distance between the two adjacent rows of the plurality of elastic units respectively in the mattress area and the backrest area to increase, and   when the angle between the backrest frame and the horizontal plane is decreased, the center distance adjustment mechanism drives the center distance between the two adjacent rows of the plurality of elastic units respectively in the mattress area and the backrest area to decrease.   
     
     
         13 . The bendable elastic cushion according to  claim 12 , wherein:
 the backrest area is divided into a waist sub-area and a back sub-area,   the two adjacent rows of the plurality of elastic units respectively in the mattress area and the waist sub-area are connected by the center distance adjustment mechanism, and   two adjacent rows of the plurality of elastic units respectively in the waist sub-area and the back sub-area are connected by a second center distance adjustment mechanism.   
     
     
         14 . The bendable elastic cushion according to  claim 12 , wherein:
 the center distance adjustment mechanism comprises a groove provided on a first row of the two adjacent rows of the plurality of elastic units respectively in the mattress area and the backrest area and a sliding block provided on a second row of the two adjacent rows of the plurality of elastic units respectively in the mattress area and the backrest area,   the groove extends along a direction of the center distance between the two adjacent rows of the plurality of elastic units respectively in the mattress area and the backrest area, and   the sliding block is configured to slide along the groove to change the center distance between the two adjacent rows of the plurality of elastic units respectively in the mattress area and the backrest area.   
     
     
         15 . The bendable elastic cushion according to  claim 14 , wherein:
 the center distance adjustment mechanism comprises connecting straps respectively fixedly disposed on the two adjacent rows of the plurality of elastic units respectively in the mattress area and the backrest area and extending along a width direction of the plurality of elastic units,   two ends of each of the connecting straps protrude outward from two sides of one or more corresponding elastic units of the plurality of elastic units along the width direction of the plurality of elastic units,   a first end of each of the connecting straps is provided with the sliding block,   a second end of each of the connecting straps is provided with the groove,   between the two adjacent rows of the plurality of elastic units respectively in the mattress area and the backrest area, the sliding block of one elastic unit of the second row of the two adjacent rows of the plurality of elastic units respectively in the mattress area and the backrest area is placed in the groove of another elastic unit of the first row of the two adjacent rows of the plurality of elastic units respectively in the mattress area and the backrest area,   the sliding block has translational freedom in a direction extending along the groove, and   the sliding block has rotational freedom around an axial direction of the sliding block.   
     
     
         16 . The bendable elastic cushion according to  claim 11 , wherein:
 the base has a plane for placing the plurality of elastic units, and   one of:
 the one or more curved guide rails are located above the plane of the base, or 
 the one or more curved guide rails are two curved guide rails and a part of the two curved guide rail is located above the plane. 
   
     
     
         17 . The bendable elastic cushion according to  claim 10 , comprising:
 a push-pull mechanism for pushing or pulling the backrest frame to move along the one or more curved guide rails.   
     
     
         18 . The bendable elastic cushion according to  claim 17 , wherein:
 the push-pull mechanism is an electric push rod or a controllable gas spring.