Retractable roof with foldable ceiling

Abstract

The present invention provides a sidewall system and a collapsible building using the system thereof. The sidewall system has a fixed wall, a sidewall, and a single-side eave system that has an eave panel that can be unfolded and folded along with the movement of the sidewall automatically. A collapsible building with two sidewall systems and a sliding, retractable roof is also provided. The collapsible building can create an enclosed space easily and quickly. To solve the above problems, the present invention is proposed. A retractable roof with a foldable ceiling is provided. The roof can be used on some expandable structures such as recreational vehicles or mobile houses. Compared to the traditional sliding roof, this invention combines a foldable ceiling inside the roof. The ceiling can split the roof and room which offer a better thermal insulation function.

What is claimed is: 
     
         1 . A roof system, comprising:
 a retractable roof, comprises:
 a fixed roof module comprises two fixed opposing polygonal plates and a fixed top plate connecting top edges of the two fixed opposing polygonal plates; 
 a first extended roof module comprises two first opposing polygonal plates and a first top plate connecting top edges of the two first opposing polygonal plates; a pair of first rails is set on facing sides of the two first opposing polygonal plates of the first extended roof module; when in retracted state, the first extended roof module is nested within the fixed roof module; 
 a second extended roof module comprises two second opposing polygonal plates and a second top plate connecting top edges of the two second opposing polygonal plates; a pair of second rails is set on facing sides of the two second opposing polygonal plates of the second extended roof module; when in retracted state, the second extended roof module is nested within the first extended roof module; and 
 a sliding roof module comprises two sliding opposing polygonal plates, a sliding top plate connecting top edges of the two sliding opposing polygonal plates, a sliding bottom plate connecting bottom edges of the two sliding opposing polygonal plates, a sliding front plate connecting front edges of the two sliding opposing polygonal plates, and a sliding rear plate connecting rear edges of the two sliding opposing polygonal plates; wherein the two sliding opposing polygonal plates, the sliding top plate, the sliding bottom plate, the sliding front plate and the sliding rear plate form a hollow six-sided body; when in retracted state, the sliding roof module is placed inside the second extended roof module; and 
   a foldable ceiling, which is connected to the retractable roof, comprises:
 a first foldable ceiling module inside the first extended roof module; the first foldable ceiling module comprises a plurality of first ceiling plate; edges of adjacent first ceiling plates are provided with first coaxial pin holes through which first pins pass to pivot the adjacent first ceiling plates; first rotary shafts are provided extending from opposite outer sides of each first ceiling plate, wherein, each first rotary shafts rotates and slides along the pair of first rails; and, 
 a second foldable ceiling module inside the second extended roof module; the second foldable ceiling module comprises a plurality of second ceiling plate; edges of adjacent second ceiling plates are provided with second coaxial pin holes through which second pins pass to pivot the adjacent second ceiling plates; second rotary shafts are provided extending from opposite outer sides of each second ceiling plate, wherein, each second rotary shafts rotates and slides along the pair of second rails; 
 wherein, the sliding roof module has a sliding roof module operating end and a sliding roof module driving end along sliding direction; the second extended roof module has a second extended roof module operating end and a second extended roof module driving end; the first extended roof module has a first extended roof module operating end and a first extended roof module stopping end; the fixed roof module comprises a fixed roof module stopping end; when the sliding roof module operating end slides out, the sliding roof module driving end brings the second extended roof module operating end slide out, and the second extended roof module driving end brings the first extended roof module operating end slide out until the first extended roof module stopping end stopped by the fixed roof module stopping end to form an extended status for the retractable roof; the foldable ceiling is driven by extension of the retractable roof to unfold simultaneously. 
   
     
     
         2 . The roof system of  claim 1 , wherein a seal is provided at adjacent portions of two adjacent roof modules. 
     
     
         3 . The roof system of  claim 2 , wherein the seal is fluorine caoutchouc, ethylene propylene diene monomer, silicone, or rubber strip. 
     
     
         4 . The roof system of  claim 1 , wherein the sliding roof module driving end comprises a driving step protruding upward from rear end of the sliding roof module; the second extended roof module operating end comprises an operating step protruding downward from front end of the second extended roof module; the sliding roof module driving end is coupled with the second extended roof module operating end. 
     
     
         5 . The roof system of  claim 4 , wherein the driving step is provided with a driving slot at bottom; the operating step comprises an L-shaped plate adapted to the driving slot. 
     
     
         6 . The roof system of  claim 1 , wherein the second extended roof module driving end comprises a driving step protruding upward from rear end of the second extended roof module; the first extended roof module operating end comprises an operating step protruding downward from front end of the first extended roof module; the second extended roof module driving end is coupled with the first extended roof module operating end. 
     
     
         7 . The roof system of  claim 6 , wherein the driving step is provided with a driving slot at bottom; the operating step comprises an L-shaped plate adapted to the driving slot. 
     
     
         8 . The roof system of  claim 1 , wherein the first extended roof module stopping end comprises a first stopping step protruding upward from rear end of the first extended roof module; the fixed roof module stopping end comprises a fixed stopping step protruding downward from front end of the fixed roof module; the first extended roof module stopping end is coupled with the fixed roof module stopping end. 
     
     
         9 . The roof system of  claim 8 , wherein the fixed stopping step is provided with a fixed slot at bottom; the first stopping step comprises an L-shaped plate adapted to the fixed slot. 
     
     
         10 . The roof system of  claim 1 , wherein each rail of the first rails is provided with a first hole at end, and one end of the first foldable ceiling module is pivoted in the first hole; another end of the first foldable ceiling module is connected to the second extended roof module. 
     
     
         11 . The roof system of  claim 1 , wherein each rail of the second rails is provided with a second hole at end, and one end of the second foldable ceiling module is pivoted in the second hole; another end of the second foldable ceiling module is connected to the sliding roof module. 
     
     
         12 . The roof system of  claim 1 , wherein the roof system comprises one or more middle-extended roof modules nested between the first extended roof module and the second extended roof module, each roof module has same setup as the first extended roof module; and each middle-extended roof module has a middle-extended foldable ceiling module inside, each middle-extended ceiling module has same setup as the first foldable ceiling module. 
     
     
         13 . The roof system of  claim 1 , wherein each first ceiling plate is unfolded or folded at same angle simultaneously. 
     
     
         14 . The roof system of  claim 1 , wherein each second ceiling plate is unfolded or folded at same angle simultaneously. 
     
     
         15 . A collapsible building, comprising:
 a collapsible building system and a roof system of  claim 1 , which covers top of the collapsible building system;   the collapsible building system comprises:
 a first fixed wall; 
 a first sidewall pivoted to the first fixed wall, the first sidewall rotates around the first fixed wall about a first pivoting axis; 
 a first single-side eave system comprises a first eave panel hinged to the first sidewall, the first eave panel rotates around a first hinge axis correspondingly; 
 a second fixed wall; 
 a second sidewall pivoted to the second fixed wall, the second sidewall rotates around the second fixed wall about a second pivoting axis; 
 a second single-side eave system comprises a second eave panel hinged to the second sidewall, the second eave panel rotates about a second hinge axis correspondingly; 
 the first fixed wall, the first sidewall, and the first single-side eave system form a first sidewall system in open state, at which state angle between the first sidewall and the first fixed wall is 180°; 
 the second fixed wall, the second sidewall, and the second single-side eave system form a second sidewall system in open state, at which state angle between the second sidewall and the second fixed wall is 180°; 
 the first sidewall system and the second sidewall system in the open state are facing each other; 
   wherein,
 the fixed roof module is secured to top of the first fixed wall and the second fixed wall; after the first sidewall system and the second sidewall system are in the open state, the first extended roof module, the second extended roof module, and the sliding roof module slide on top of the first side wall system and the second wall system. 
   
     
     
         16 . The collapsible building of  claim 15 , further includes a first exterior wall firmly attached to the first fixed wall and the second fixed wall respectively; and a second exterior wall detachably connected to the first sidewall and the second sidewall respectively. 
     
     
         17 . The collapsible building of  claim 15 , wherein the first sidewall includes first roof tracks mounted on top; the first extended roof module, the second extended roof module, and the sliding roof module move along the first roof tracks to convert the retractable roof between an open configuration and a closed configuration; and the second sidewall includes second roof tracks respectively, the second and the first roof tracks have same configuration; the first extended roof module, the second extended roof module, and the sliding roof module slide along the first roof tracks and the second roof tracks to form an extended status. 
     
     
         18 . The collapsible building of  claim 15 , wherein the roof system comprises one or more middle-extended roof modules nested between the first extended roof module and the second extended roof module, each roof module has same setup as the first extended roof module; and each middle-extended roof module has a middle-extended foldable ceiling module inside, each middle-extended ceiling module has same setup as the first foldable ceiling module. 
     
     
         19 . The collapsible building of  claim 15 , wherein a seal is provided at adjacent portions of two adjacent roof modules. 
     
     
         20 . The collapsible building of  claim 15 , wherein each first ceiling plate is unfolded or folded at same angle simultaneously.