Collapsible structure for shelter

1 . A collapsible structure comprising:

at least two standing frames connected by an extendable linkage, said extendable linkage allows the at least two standing frames to be closed or extended;

wherein each of said at least two standing frames has;

two standing poles, comprising a first standing pole and a second standing pole, wherein a top end of said first standing pole and a top end of said second standing pole are connected by a pivot point, allowing said two standing poles to rotate about said pivot point and to be folded or unfolded;

a sliding member mounted to the first standing pole and configured to slide on said first standing pole, able to move along a length thereof; and

a link pole, one end of which is pivotally connected to said sliding member and a second end thereof is pivotally connected to said second standing pole;

wherein each of said at least two standing frames is configured such that when said first standing pole of the respective standing frame is folded towards said second standing pole of the respective standing frame, said link pole of the respective standing frame rotates around the second end thereof, and drives said sliding member of the respective standing frame away from said pivot point of the respective standing frame along said first standing pole of the respective standing frame until the two standing poles of the respective standing frame are completely folded up; and when said first standing pole of the respective standing frame is opened up from said second standing pole of the respective standing frame, said link pole of the respective standing frame rotates accordingly and drives said sliding member of the respective standing frame towards said pivot point of the respective standing frame along said first standing pole of the respective standing frame until the two standing poles of the respective standing frame are completely unfolded.

2 . The collapsible structure of claim 1 , wherein said extendable linkage further comprises at least one extendable link assembly, a middle of said at least one extendable link assembly is pivotally connected to adjust a distance between two ends thereof; and

the two ends of said extendable linkage are each pivotally connected to a respective said pivot point of a respective standing frame of said at least two standing frames adjacent to said extendable linkage.

3 . The collapsible structure of claim 1 , wherein said extendable linkage comprises at least one extendable link assembly, and said at least one extendable link assembly includes at least a pair of link members connected in an X-shaped configuration by a central pivot, wherein the pair of link members is a first link member and a second link member, wherein said first link member is pivotally connected to said pivot point of a first standing frame of said at least two standing frames by a first end thereof and to said sliding member on a second standing frame of said at least two standing frames by a second end thereof, and wherein said second link member is pivotally connected to said sliding member on the first standing frame at a first end thereof and to said pivot point of the second standing frame at a second end thereof.

4 . The collapsible structure of claim 1 ,

wherein each of said at least two standing frames comprises two sliding members, wherein the sliding member mounted to the first standing pole of the respective standing frame is one of said two sliding members, and the other of said two sliding members is a sliding member mounted to and configured to slide along the second standing pole of the respective standing frame;

wherein said extendable linkage comprises two extendable link assemblies, wherein each of the two extendable link assemblies is located on a respective side of said standing frames;

wherein each of said extendable link assemblies further comprises:

at least a pair of link members connected together in an X-shaped configuration by a central pivot, wherein said at least a pair of link members comprises a first link member and a second link member;

wherein in a first extendable link assembly of the two extendable link assemblies, one end of said first link member is connected to said pivot point of a first standing frame of said at least two standing frames, while another end of said first link member is connected to a first sliding member of said two sliding members on a second standing frame of said at least two standing frames, wherein one end of said second link member is connected a first sliding member of said two sliding members on the first standing frame, and another end of said second link member is connected to said pivot point of the second standing frame; and

wherein in a second extendable link assembly of the two extendable link assemblies, one end of said first link member is connected to said pivot point of the first standing frame, while another end of said first link member is connected to a second sliding member of said two sliding members on the second standing frame, wherein one end of said second link member is connected a second sliding member of said two sliding members on the first standing frame, and another end of said second link member is connected to said pivot point of the second standing frame.

5 . The collapsible structure of claim 1 , wherein said sliding member is further equipped with a locking member, and said locking member enables said sliding member to be locked in any position during travel thereof.

6 . The collapsible structure of claim 1 ,

wherein the extendable linkage comprises two extendable link assemblies positioned in a sequence along an extending direction of the at least two standing frames, wherein each of the extendable link assemblies includes a first link member and a second link member connected to each other in an X-shaped configuration by a central pivot;

wherein an upper end of the first link member in a first extendable link assembly of the two extendable link assemblies is pivotally connected to said pivot point of a first standing frame of the at least two standing frames, while a lower end of said second link member in said first extendable link assembly is pivotally connected to said sliding member of said first standing frame; and a lower end of said first link member in said first extendable link assembly is pivotally coupled to a lower end of said second link member in a second extendable link assembly of the two extendable link assemblies; and an upper end of said second link member in the first extendable link assembly is pivotally coupled to an upper end of said first link member in said second extendable link assembly; and the lower end of said first link member in said second extendable link assembly is pivotally connected to said sliding member of a second standing frame of the at least two standing frames, while the upper end of said second link member in said second extendable link assembly is pivotally connected to said pivot point of said second standing frame.

7 . A collapsible structure comprising:

at least two standing frames, each standing frame consisting of two standing poles: a first standing pole and a second standing pole, which are pivotally connected at a top through a first pivot point, wherein said first standing pole is pivotally connected with a first bracing pole, and the second standing pole is pivotally connected with a second bracing pole, and inner ends of said first bracing pole and said second bracing pole are pivotally connected together through a second pivot point;

wherein for each standing frame:

said first standing pole includes a sliding member, said second standing pole includes a sliding member; said first bracing pole is pivotally connected to the sliding member of the first standing pole; and said second bracing pole is pivotally connected to the sliding member of the second standing pole; and

an extendable linkage is provided between the at least two standing frames, to provide for closure or extension, wherein a first end of said extendable linkage is connected to said first pivot point and said second pivot point of a first standing frame of the at least two standing frames, a second end of said extendable linkage is connected to said first pivot point and said second pivot point of a second standing frame of the at least two standing frames;

said extendable linkage is folded, for:

each standing frame of the at least two standing frames is configured such that when said extendable linkage drives said second pivot point of the respective standing frame away from said first pivot point of the respective standing frame, causing said bracing poles of the respective standing frame and said standing poles of the respective standing frame to rotate and fold accordingly, and when said extendable linkage is unfolded, said extendable linkage drives said second pivot point of the respective standing frame towards said first pivot point of the respective standing frame, causing said bracing poles of the respective standing frame and said standing poles of the respective standing frame to rotate and unfold accordingly.

8 . The collapsible structure of claim 7 , wherein said extendable linkage has at least one extendable link assembly that includes at least one pair of a first link member and a second link member connected together in an X-shaped configuration by a respective central pivot, wherein upper ends of said extendable linkage are pivotally linked to said first pivot point of said at least two standing frames, while lower ends of said extendable linkage are pivotally linked to said second pivot points of said at least two standing frames.

9 . The collapsible structure of claim 7 , wherein said extendable linkage further comprises two extendable link assemblies positioned in a sequence along an extending direction, wherein each extendable link assembly includes link members connected in an X-shaped configuration by a central pivot; and

an upper end of a first link member in a first extendable link assembly of said two extendable link assemblies is pivotally connected to said first pivot point of said first standing frame, a lower end of a second link member in the first extendable link assembly is pivotally connected to said second pivot point of said first standing frame, and a lower end of said first link member in said first extendable link assembly is pivotally coupled to a lower end of said second link member in a second extendable link assembly of said two extendable link assemblies through a fourth pivot point, and an upper end of said second link member in said first extendable link assembly is pivotally coupled to an upper end of said first link member in said second extendable link assembly through a third pivot point, and a lower end of said first link member in said second extendable link assembly is pivotally connected to said second pivot point of said second standing frame, while an upper end of said second link member in said second extendable link assembly is pivotally connected to said first pivot point of said second standing frame.

10 . The collapsible structure of claim 9 , wherein said extendable linkage is pivotally connected with a first support pole and a second support pole on each side, wherein said first support pole is connected to said third pivot point, while said second support pole is connected to said fourth pivot point, and another end of said second support pole is connected to said first support pole.

11 . The collapsible structure of claim 9 , wherein a locking device is provided between said first and second pivot points of said standing frame to allow said second pivot point to remain in place when said structure is unfolded, alternatively a locking device may be provided on said extendable linkage to keep said extendible linkage in position when extended.

12 . The collapsible structure of claim 7 , wherein outer ends of said first and second bracing poles extend out from said standing frames to create connecting portions for a canvas.

13 . The collapsible structure of claim 7 , wherein the collapsible structure consists of two standing frames, and upper ends of the two standing frames are closer together than lower ends of the two standing frames, wherein each standing frame has said first and second pivot points which are vertically aligned.

14 . The collapsible structure of claim 7 , wherein for each standing frame said first and second pivot points are vertically aligned, each standing frame also having a side extension pole and a side bracing pole attached to an outer side thereof, an upper end of said side extension pole pivoting to said first pivot point of said standing frame while one end of said side bracing pole pivots to said second pivot point of said standing frame, and another end of said side bracing pole pivots to said side extension pole.

15 . The collapsible structure of claim 7 , which further comprises two standing frames, said first and second pivot points of each standing frame being vertically aligned, each standing frame also having a third standing pole and a third bracing pole located on an outer side, an upper end of said third standing pole being pivotally connected to said first pivot point of said standing frame, while a lower end is level with said first and second standing poles, one end of said third bracing pole being pivotally connected to said second pivot point of said standing frame, and another end being pivotally connected to said third standing pole.

16 . The collapsible structure of claim 7 , wherein each of said standing frames is provided with two pull poles, each corresponding to said first and second bracing poles, upper ends of the pull poles being connected to said first pivot point, while said pull poles are pivotally connected to said first and second bracing poles correspondingly.