Abstract:
This invention relates to a light-weight foldable chair for leisure with seat and backrest loop capable to be folded once, which can be used in households, outdoors, in a courtyard, in a park and at the beach.

Description:
REFERENCES TO RELATED APPLICATIONS  
       [0001]     The present application is claiming priority of Chinese Patent Application No. 200520070078.7, filed on Mar. 24, 2005, the content of which is herein incorporated by reference.  
       BACKGROUND OF THE INVENTION  
       [0002]     1. Field of the Invention  
         [0003]     This invention relates to a chair for leisure with seat, backrest, armrest and frame folded once, in particular to a light-weight foldable chair for leisure that can be used in a variety of environments including, for example, in households, outdoors, in a courtyard, in a park, and at beach.  
         [0004]     2. Description of the Related Art  
         [0005]     At present, the foldable chair suitable for travel and leisure on the market is configured with only supports, backrest tubes and fabric connected. When unfolded, the chair is dragged by the fabric on the seat, which bears a great force and is likely to be damaged. So, one feels uncomfortable while sitting. The existing well known seat-loop foldable chair is configured with its upper portion made of an entire circle, unable to be folded, and having a large volume. The chair seat employs an insert-type structure, having a positioning and fixing device. When the chair is to be folded, it is necessary to open the fixing device first, and it is inconvenient for folding. The chair has a large volume after being folded, and so is inconvenient for carrying.  
       BRIEF SUMMARY OF THE INVENTION  
       [0006]     The present invention provides a light-weight foldable chair for leisure that overcomes the above-mentioned defects. The chair has a seat, a back-rest and armrest, and quadrangle frame, convenient to be folded together, easy in use and for carrying, and having a good stability. A person feels comfortable when sitting in the chair,  
         [0007]     The light-weight foldable chair for leisure of this invention is achieved by the following embodiments:  
         [0008]     In one embodiment, the light-weight foldable chair for leisure of this invention comprises fabric for seat and backrest, two seating frame armrest tubes, two backrest tubes, two backrest support tubes, two seating frame support tubes, crossed support tubes, two rotatable joint members, two sliding disks, two seat disks, four foot disks; said crossed support tubes having front crossed tubes, rear crossed tubes, side crossed support tubes, and between the two seating frame support tubes are disposed the front crossed support tubes, which are hinged to each other, at the upper portions of each of the two seating frame support tubes is disposed the seat disk; the upper portion of the front crossed support tube and the seat disk are movably connected; the lower portion of the front crossed support tube is connected to the foot disk; at the upper end of the seating frame support tube is disposed the rotatable joint member via a U-shaped hinging member, and at the lower end of the seating frame support tube is disposed a sliding sleeve, which is sleeved on the side crossed support tube; between the two backrest support tubes is disposed a rear crossed tube, the upper end of which is connected to the sliding disk, and the lower end of which is movably connected to the foot disk; said sliding disk is sleeved on the backrest support tube; at the upper ends of the two backrest support tubes are disposed rotatable joint members via the U-shaped hinging member, and the lower ends of the two backrest support tubes are mounted on the foot disks; between the two backrest support tubes and the two seating frame support are disposed side crossed support tubes respectively; the side crossed support tubes are hinged to each other, wherein the upper end of one of the side crossed support tubes is movably connected to the seat disk, and the lower end thereof is movably connected to the foot disk; the two backrest tubes are connected and clipped to the rotatable joint member on the upper end of the backrest support tube via a long joint member, and the two seating frame armrest tubes are connected and clipped to the rotatable joint member on the upper end of the seating frame support tube via another long joint member; between the two seating frame armrest tubes and two backrest tubes are connected respectively via a short joint member, and the two seating frame armrest tubes and two backrest tubes are sleeved with fabric.  
         [0009]     The light-weight foldable chair for leisure of this invention has the following features and advantages:  
         [0010]     When using the light-weight foldable chair for leisure, one can first open the folded chair, with two hands holding the two long joint members respectively to pull outward. Thus, the sliding sleeve slides downward along the two side crossed support tubes, while the sliding disk slides downward along the backrest support tubes; the fabric will spread together with the backrest tubes and seating frame armrest tubes, and the U-shaped hinging member mounted on the upper portions of the seating frame support tubes and backrest support tubes will bring along rotation of the rotatable joint member. The chair can be used just by pulling out the backrest tubes and the seating frame armrest tubes.  
         [0011]     To fold the chair, one just holds the two joint members to pull upward, and furl inward, thus, the sliding sleeve and sliding disk will slide upward, allowing the crossed support tubes to furl inward, while the backrest tube and seating frame armrest tube will be folded inward to an integral, easy for carrying.  
         [0012]     The light-weight foldable chair for leisure of this invention is reasonably designed, compact in structure, elegant in appearance design, convenient in use and comfortable for sitting and resting. The chair employs a quadrangle chair support, having a good stability. The backrest tubes and the seating frame armrest tubes are assembled by two modules, easy for folding. The chair, after being folded, has a much smaller volume than a circular foldable chair, so it is convenient for packaging and carrying. 
     
    
     BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS  
       [0013]      FIG. 1  is a schematic view of a light-weight foldable chair for leisure according to this invention;  
         [0014]      FIG. 2  is a structural view of an example of the seat loop and chair support of the light-weight foldable chair for leisure according to this invention;  
         [0015]      FIG. 3  is a structural view of another example of the seat loop and chair support of the light-weight foldable chair for leisure according to this invention;  
         [0016]      FIG. 4  is a structural view of the rotatable joint member of the light-weight foldable chair for leisure according to this invention;  
         [0017]      FIG. 5  is a structural view of the long joint member of the light-weight foldable chair for leisure according to this invention;  
         [0018]      FIG. 6   a  is a front structural view of the short joint member of the light-weight foldable chair for leisure according to this invention; and  FIG. 6   b  is a perspective structural view thereof;  
         [0019]      FIG. 7  is a structural view of the foot disk of the light-weight foldable chair for leisure according to this invention;  
         [0020]      FIG. 8  is a structural view of the sliding sleeve of the light-weight foldable chair for leisure according to this invention;  
         [0021]      FIG. 9  is a structural view of the U-shaped hinging member of the light-weight foldable chair for leisure according to this invention;  
         [0022]      FIG. 10  is a structural view of the sliding disk of the light-weight foldable chair for leisure according to this invention;  
         [0023]      FIG. 11  is a structural view of the seating disk of the light-weight foldable chair for leisure according to this invention;  
         [0024]      FIG. 12  is a structural view of the light-weight foldable chair for leisure in a folding state according to this invention;  
         [0025]      FIGS. 13 and 14  are the partially amplified views of parts A and B in  FIG. 2  respectively. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0026]     Specific examples of this invention will be described in conjunction with the drawings.  
         [0027]     Referring to  FIGS. 1 and 2 ,  FIG. 1  is a schematic view of a light-weight foldable chair for leisure according to this invention;  FIG. 2  is a structural view of an example of the seat circle and chair support of the light-weight foldable chair for leisure according to this invention; meanwhile, referring to  FIGS. 13 and 14 , which are the partially amplified views of parts A and B in  FIG. 2  respectively. The light-weight foldable chair for leisure of this invention comprises fabric for seat and backrest  11 , seating frame armrest tubes  10 , backrest tubes  12 , backrest support tubes  15 , seating frame support tubes  4 , crossed support tubes, rotatable joint members  8 , sliding disks  16 , seat disks  5 , foot disks  3 ; except for the fabric  11  for seat and backrest, four foot disks  3  and the crossed support tubes, all the above members are disposed symmetrically left and right, but the reference numbers are marked only on one member. The crossed support tubes include front crossed tubes  14 , rear crossed tubes  17 , side crossed support tubes  1 ,  13 . Between the two seating frame support tubes  4  are disposed front crossed support tubes  14 , which are hinged to each other, their upper portions are connected movably to the seat disks  5 , and the lower portions are connected to the foot disks  3 . At the upper portion of each of the two seating frame support tubes  4  is disposed a seat disk  5 ; the two seating frame support tubes  4  penetrate the fitting hole  52  of the seat disk  5 ; at the upper ends of the seating frame support tubes  4  are disposed rotatable joint members  8  via a U-shaped hinging member  7 . Please refer to  FIGS. 4 and 9  at the same time, the joint hole  72  passing through the U-shaped hinging member  7  via the joint member is connected to the upper end of the seating frame support tubes  4 , and the joint hole  73  of the U-shaped hinging member  7  is connected to the fixing hole  83  of the rotatable joint member  8  via another joint member. The lower end of each of the seating frame support tubes  4  is connected the sliding sleeve  2 , which is sleeved on the side crossed support tubes  1 ,  13 . Between the two backrest support tubes  15  is disposed a rear crossed tube  17 , the upper end of which is connected to the sliding disk  16 , and the lower end of which is movably connected to the foot disk  3 ; said sliding disk  16  is sleeved on the backrest support tube  15 , and can slide along the backrest support tube  15  while folding or unfolding. At the upper ends of the two backrest support tubes  15  are disposed rotatable joint members  8  via the U-shaped hinging member  7 , and the lower ends of the two backrest support tubes  15  are mounted on the foot disks  3 . Between the two backrest support tubes  15  and the two seating frame supports  4  are disposed side crossed support tubes  1 ,  13  respectively; the side crossed support tubes are hinged to each other, wherein the upper end of one of the side crossed support tubes is movably connected to the seat disk  5 , and the lower end thereof is movably connected to the foot disk  3 ; the upper end of the other one of the side crossed support tubes is movably connected to the sliding disk  16 , and the lower end thereof is movably connected to the foot disk  3 . The two backrest tubes  12  are and clipped to the rotatable joint member  8  on the upper end of the backrest support tube and connected thereto via a long joint member  9 . The two seating frame armrest tubes  10  are clipped to the rotatable joint member  8  on the upper end of the seating frame support tube  4  and connected thereto via another long joint member  99 . Between the two seating frame armrest tubes  10  and two backrest tubes  12  are connected respectively via a short joint member  6 , and the seating frame armrest tubes  10  and backrest tubes  12  are sleeved with fabric for seat and backrest. The seat and backrest loop formed by the two seating frame armrest tubes  10  and the two backrest tubes can be designed into any different shapes, such as a circle, an ellipse, or more than half circle.  
         [0028]      FIG. 3  shows a structure of another example of the light-weight foldable chair for leisure according to this invention, wherein the two seating frame armrest tubes  10  are connected via a joint plate  999 , and the lower ends  101  of the two seating frame armrest tubes  10  are straight, while the structure of other portions is the same as the seat and backrest circle and the chair frame of the light-weight foldable chair for leisure of this invention as shown in  FIG. 2 .  
         [0029]     Referring to  FIG. 4 , the rotatable joint member  8  of the light-weight foldable chair for leisure of this invention comprises a joint body  81 , on which is disposed a U-shaped groove  82 , the backrest tube and seating frame armrest tube being fitted therein. The rotatable joint member further comprises a joint protrusion, on which is provided a fixing hole  83  for connecting the U-shaped hinging member.  
         [0030]     Referring to  FIG. 5 , the long joint member  9  of the light-weight foldable chair for leisure of this invention comprises a joint body  91 , on which are disposed two grooves  92  at both ends of the joint body, reinforced ribs  93  and joint holes for tubes  94 . One end of the backrest tube and the seating frame armrest tube is fitted to the groove  92 , the pipe fittings  12 ,  10  being movably connected to the grooves by penetrating the rivet or bolt through the tube joint hole  94 .  
         [0031]     Referring to  FIGS. 6   a ,  6   b , the short joint member  6  of the light-weight foldable chair for leisure of this invention comprises a joint body  61 , on one end of which is disposed a tube fitting hole  62 , a tube joint hole  63 , on the other end of which is disposed a tube joint groove  65 , beside the joint groove  65  being disposed a joint hole  64 . The pipe fittings  12 ,  10  can be disposed in the tube fitting hole  62  and tube joint groove  65  respectively, each of the above pipe fittings  12 ,  10  being movably connected to the short joint pipe fittings  6  by penetrating rivet or bolt through the tubing joint holes  63  and  64 .  
         [0032]     Referring to  FIG. 7 , the foot disk  3  of the light-weight foldable chair for leisure of this invention comprises a base seat  31 , at the upper portion of which is provided a pipe fitting insert hole  32 , and two pipe fitting joint protrusions  33  connected to the outer sidewall thereof. The joint protrusions  33  can fix the crossed support tubes, and the lower ends of the backrest support tube  15  and the seating frame support tube  4  can be inserted and fixed into the pipe fittings insert hole  32 .  
         [0033]     Referring to  FIG. 8 , the sliding sleeve  2  of the light-weight foldable chair for leisure of this invention comprises a sliding sleeve body  21 , on which is provided a sliding sleeve hole  22 , on the side of the sliding sleeve body  21  is provided a pipe fittings joint protrusion  23 . As shown in  FIG. 1 , the side crossed support tubes  1 ,  13  are sleeved in the sliding sleeve hole  22 , and the seating frame support tube  4  is movably connected to the sliding sleeve  2  via the hole on the pipe fittings joint protrusion  23 .  
         [0034]     Referring to  FIG. 9 , the U-shaped hinging member  7  of the light-weight foldable chair for leisure of this invention comprises a joint piece  71  for the U-shaped hinging member, on which is provided pipe fitting joint holes  72 ,  73 .  
         [0035]     Referring to  FIG. 10 , the sliding disk  16  of the light-weight foldable chair for leisure of this invention comprises a sliding disk body  161 , on which is provided a sliding hole  162  for sleeving on the backrest support tube  15 . On one side of the sliding hole  162  are provided two pipe fitting joint protrusions  163 , and the upper end of the crossed support tube is movably connected to the sliding disk  16  via the hole on the pipe fittings joint protrusion  163 .  
         [0036]     Referring to  FIG. 11 , the seating disk  5  of the light-weight foldable chair for leisure of this invention comprises a seating disk body  51 , on which is provided a pipe fittings fitting hole  52 , the seating frame support tube  4  being sleeved in the pipe fittings fitting hole  52 . At one side of the fitting hole  52  is provided a positioning hole  53 , and on the seating disk body  51  are provided two pipe fittings joint protrusions  54 . Their connecting function is similar to the sliding disk  16 , whereas on the wall surface of the pipe fittings fitting hole  52  is provided a fixing hole for fixing the seating frame support tube  4 .  
         [0037]     What is described above is only the specific example of this invention, and cannot be construed as limitation to the scope of examples of this invention. All equivalent variations and modifications made in the light of this patent application for an invention and the specification shall fall within the scope as defined by the appended claims.