Convertible chair-bed

Abstract

A convertible chair-bed is provided, including: a fixed bed frame and a movable bed frame; a head frame body, a hip frame body, a leg frame body, and a tail frame body that are rotatably connected in sequence, wherein the head frame body and the hip frame body are both lapped on the movable bed frame; a rear extension rod fixedly arranged at a bottom of the hip frame body; a diagonal stay, wherein two ends of the diagonal stay are respectively rotatably connected to a front end of the tail frame body and the fixed bed frame; a rotating stand rotatably mounted on the movable bed frame; a first telescopic rod; and a second telescopic rod, wherein two ends of the second telescopic rod are respectively rotatably connected to the head frame body and the movable bed frame.

What is claimed is: 
     
         1 . A convertible chair-bed, comprising:
 a fixed bed frame ( 1 ) and a movable bed frame ( 2 );   a head frame body ( 3 ), a hip frame body ( 4 ), a leg frame body ( 5 ), and a tail frame body ( 6 ) that form a bed surface and that are rotatably connected in sequence, wherein the head frame body ( 3 ) and the hip frame body ( 4 ) are both lapped on the movable bed frame ( 2 );   a rear extension rod ( 7 ) fixedly arranged at a bottom of the hip frame body ( 4 ), wherein a rear end of the rear extension rod ( 7 ) is rotatably connected to the movable bed frame ( 2 ), and the leg frame body ( 5 ) is simultaneously lapped on the movable bed frame ( 2 ) and the rear extension rod ( 7 );   a diagonal stay ( 8 ), wherein two ends of the diagonal stay ( 8 ) are respectively rotatably connected to a front end of the tail frame body ( 6 ) and the fixed bed frame ( 1 );   a rotating stand ( 9 ) rotatably mounted on the movable bed frame ( 2 ), wherein a tail end of the rotating stand ( 9 ) is connected to the leg frame body ( 5 ), and the rotating stand ( 9 ) is capable of swinging backwards through a rear end of the rotating stand ( 9 ) to control a front end of the leg frame body ( 5 ) to swing upwards;   a first telescopic rod ( 10 ), wherein two ends of the first telescopic rod ( 10 ) are respectively rotatably connected to the rotating stand ( 9 ) and the fixed bed frame ( 1 ), and a rear end of the first telescopic rod ( 10 ) is capable of controlling the rear end of the rotating stand ( 9 ) to swing upwards when retracting back;   a second telescopic rod ( 11 ), wherein two ends of the second telescopic rod ( 11 ) are respectively rotatably connected to the head frame body ( 3 ) and the movable bed frame ( 2 ), and a front end of the second telescopic rod ( 11 ) is capable of controlling a front end of the head frame body ( 3 ) to swing upwards when extending out; and   a connecting frame ( 12 ) arranged between the second telescopic rod ( 11 ) and the head frame body ( 3 ), wherein after a front end of the movable bed frame ( 2 ) swings in a largest angle relative to the hip frame body ( 4 ), the head frame body ( 3 ) and the hip frame body ( 4 ) are controlled to overall tilt backwards under the action of the second telescopic rod ( 11 ).   
     
     
         2 . The convertible chair-bed according to  claim 1 , wherein the movable bed frame ( 2 ) is arranged on the fixed bed frame ( 1 ) in a manner of moving in a front-back direction;
 when the bed surface is in a flat and straight state and the front end of the leg frame body ( 5 ) is in an upswing state, the movable bed frame ( 2 ) is entirely located at an extreme position of a front end of the fixed bed frame ( 1 ); and   when the movable bed frame ( 2 ) is located at an extreme position of a rear end of the fixed bed frame ( 1 ), the tail frame body ( 6 ) is in a state that a tail end tilts downwards.   
     
     
         3 . The convertible chair-bed according to  claim 2 , wherein first rails ( 13 ) are arranged at four corners inside the fixed bed frame ( 1 ); and a first roller ( 14 ) that moves inside the first rails ( 13 ) is arranged at a bottom of the movable bed frame ( 2 ). 
     
     
         4 . The convertible chair-bed according to  claim 1 , wherein the rotating stand ( 9 ) comprises:
 a shaft body part ( 9 . 1 ), wherein two ends of the shaft body part ( 9 . 1 ) are rotatably connected to the movable bed frame ( 2 );   a hinge plate ( 9 . 2 ) fixedly arranged on the shaft body part ( 9 . 1 ), wherein one end of the first telescopic rod ( 10 ) is rotatably connected to the hinge plate ( 9 . 2 ); and   a rotating arm ( 9 . 3 ) fixedly arranged on the shaft body part ( 9 . 1 ), wherein the rotating arm ( 9 . 3 ) is in a state that a rear end tilts upwards; and the rear end of the rotating arm ( 9 . 3 ) is connected to the leg frame body ( 5 ).   
     
     
         5 . The convertible chair-bed according to  claim 4 , wherein a second rail ( 15 ) is arranged at a bottom of the leg frame body ( 5 ); and a second roller ( 16 ) that moves inside the second rail ( 15 ) is arranged at the rear end of the rotating arm ( 9 . 3 ). 
     
     
         6 . The convertible chair-bed according to  claim 4 , wherein two rotating arms ( 9 . 3 ) are comprised; and the two rotating arms ( 9 . 3 ) are symmetrically distributed on two sides of the shaft body part ( 9 . 1 ). 
     
     
         7 . The convertible chair-bed according to  claim 1 , wherein the connecting frame ( 12 ) comprises:
 a fixed part ( 12 . 1 ) fixedly mounted at a bottom of a front end of the hip frame body ( 4 );   a rotating part ( 12 . 2 ) rotatably mounted on the fixed part ( 12 . 1 ), wherein the rotating part ( 12 . 2 ) is in a state that a bottom end tilts backwards; a top end of the rotating part ( 12 . 2 ) is fixedly connected to the head frame body ( 3 ), and a front end of the second telescopic rod ( 11 ) is rotatably connected to the bottom end of the rotating part ( 12 . 2 ); and   a limiting part ( 12 . 3 ) fixedly mounted at a front end of the fixed part ( 12 . 1 ) and located on a front side of the rotating part ( 12 . 2 ), wherein when the head frame body ( 3 ) swings in a largest angle relative to the hip frame body ( 4 ), a front side surface of the rotating part ( 12 . 2 ) is in contact with the limiting part ( 12 . 3 ).   
     
     
         8 . The convertible chair-bed according to  claim 1 , wherein one diagonal stay ( 8 ) is arranged on each of two sides of the tail frame body ( 6 ); and the diagonal stays ( 8 ) are located on an outer side of the fixed bed frame ( 1 ) in a width direction. 
     
     
         9 . The convertible chair-bed according to  claim 1 , wherein both the first telescopic rod ( 10 ) and the second telescopic rod ( 11 ) are electrical telescopic rods.