Collapsible play structures

Abstract: A collapsible play structure comprises one or more play modules connected together, each play module comprising at least three foldable frame members, each having a folded and an unfolded orientation. A fabric material substantially covers each frame member to form a side panel for each frame member when the frame member is in the unfolded orientation. Each side panel further comprises at least three sides. The left side of each side panel is connected and hinged to the right side of an adjacent side panel, and the right side of each side panel is connected and hinged to the left side of another adjacent side panel. The bottom side of each side panel is adapted to rest on a supporting surface to support the play module.

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to collapsible structures, and in particular, to collapsible play structures which may be provided in a variety of shapes and sizes. The collapsible play structures may be twisted and folded to reduce the overall size of the play structures to facilitate convenient storage and use. 2. Description of the Prior Art Two important considerations for all toys or play things targeted for children are convenience and variety. Relating to convenience, a toy must be easily transportable so that the child can move it around the home, or even to other places outside of the home. A toy must also be easily stored since a child is likely to have many other toys that compete for precious storage space in the home. As for variety, a toy must offer enough variety in play so that the child will be able to enjoy it for a long period of time without getting bored. Larger toys often pose a greater problem with regards to convenience. The larger toys tend to be bulky, which makes it difficult to move them around the home, and sometimes makes it prohibitive to move them outside the house to other locations. Bulky toys also take up much storage space. In the past, attempts have been made to provide play structures for the entertainment of children. Such play structures have been provided in many different shapes and sizes. For example, some have been shaped as playhouses to allow children to climb into and out of the structure. However, in order to provide a structure that can temporarily house a child, such a structure must be quite large and would be difficult to transport and store. In response to this problem, attempts have been made to provide play structures that are assembled from generic rigid panels that may be disassembled after use. The generic panels are easily stored into a small container, which makes it convenient to transport and to store. These panels may also be assembled into structures having different shapes and sizes, thereby offering the child with variety. For example, U.S. Patent No. 4,073,105 to Daugherty provides a fabrication device comprised of differently-shaped rigid panels 10 connected by superimposing the curled locking means 16 of adjacent panels 10. Similarly, U.S. Patent No. 3,987,580 to Ausnit provides a connective toy comprised of rigid bodies connected by interlocking ribs and grooves. Unfortunately, these play structures suffer from the drawback that it is very time-consuming to disassemble the structure after use for storage, and to reassemble the structure before use. Since children tend to lack patience, such play structures will normally remain in their assembled state most of the time, which still results in the same problems discussed above. Thus, there remains a need for a play structure which is convenient to use, to transport, and to store, and which offers play variety to the child. US-A-5301705 discloses with reference to Fig 9, a collapsible play structure having side panels, each with straight top, bottom, left and right sides. A cover is provided formed of triangular shaped members to define a pitched roof. The precharacterising part of Claim 1 is based on this disclosure. The present invention provides a structure of which the distinguishing features are as set out in the characterising part of Claim 1. In one embodiment of the present invention, the play module comprises four side panels and four corresponding frame members, each having four sides, including a top side. A fabric is connected to the top sides of the four side panels and extends therebetween, and an opening is provided in this fabric. Openings may also be provided in one or more of the side panels to allow a child to crawl therethrough. Each side panel may comprise a frame retaining sleeve for retaining one of the frame members. The frame retaining sleeves of adjacent side panels are stitched together to form a hinged connection. Alternatively, the frame retaining sleeves of adjacent side panels may converge to form a singular retaining sleeve which retains the adjacent sides of the adjacent frame members of the corresponding adjacent side panels. The stitchings which connect the frame retaining sleeves act as hinges for the corresponding side panels. When the play module is to be folded and stored, the side panels and their corresponding frame members may be folded on top of each other about the hinges to have the side panels and frame members overlaying each other. The overlying side panels and frame members are then collapsed by twisting and folding to form a plurality of concentric frame members and side panels to substantially reduce the size of the play module in the folded orientation. A plurality of the play modules may be connected to create play structures of different shapes and sizes. The play modules may be provided as separate play modules and connected by velcro, hooks, fasteners, or other attachment mechanisms which allow for convenient attachment and detachment. These separate play structures may be provided in identical or different shapes and sizes. Alternatively, a play structure may be provided that has a plurality of play modules integrally connected to form one unitary play structure which may be folded and collapsed according to the same principles as the separate play modules. The collapsible play structures embodying the present invention are convenient for use since they are easily and quickly folded and collapsed into a smaller size for transportation and storage. A plurality of these play modules may be easily transported and stored, and provide a child with much play variety since a large number of play structures having different shapes and sizes can be created therefrom. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a collapsible play structure according to a first preferred embodiment of the present invention having one module; FIG. 1A is a partial cut-away view of the section A of the play structure of FIG. 1 illustrating a frame member retained within a sleeve; FIG. 2A is a cross-sectional view of a first preferred connection between two adjacent panels of the module of FIG. 1 taken along line 2--2 thereof; FIG. 2B is a cross-sectional view of a second preferred connection between two adjacent panels of the module of FIG. 1 taken along line 2--2 thereof; FIG. 3 is a perspective view of a collapsible play structure according to a second preferred embodiment of the present invention comprising three modules; FIG. 4A is a cross-sectional view of a first preferred connection between the four adjacent panels of the modules of FIG. 3 taken along line 4--4 thereof; FIG. 4B is a cross-sectional view of a second preferred connection between the four adjacent panels of the modules of FIG. 3 taken along line 4--4 thereof; FIG. 4C is a cross-sectional view of a third preferred connection between the four adjacent panels of the modules of FIG. 3 taken along line 4--4 thereof; FIG. 4D is a cross-sectional view of a fourth preferred connection between the four adjacent panels of the modules of FIG. 3 taken along line 4--4 thereof; FIG. 5A is a cross-sectional view of a first preferred connection between the three adjacent panels of the modules of FIG. 3 taken along line 5--5 thereof; FIG. 5B is a cross-sectional view of a second preferred connection between the three adjacent panels of the modules of FIG. 3 taken along line 5--5 thereof; FIG. 6 is a perspective view of a collapsible play structure according to a third preferred embodiment of the present invention comprising four modules connected to the different side panels of one large module; FIG. 7 is a perspective view of the collapsible play structure of FIG. 1 which may be sized to allow a child to wea the structure as part of a costume; and FIGS. 8(A) through 8(E) illustrate how the collapsible play structure of FIG. 1 may be twisted and folded for compact storage. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following detailed description is of the best presently contemplated modes of carrying out the invention. This description is not to be taken in a limiting sense, but is made merely for the purpose of illustrating general principles of embodiments of the invention. The scope of the invention is best defined by the appended claims. As shown in FIGS. 1 and 1 A, the basic component for a collapsible play structure embodying the present invention comprises a module 20. As explained in greater detail hereinbelow, the collapsible play structures embodying the present invention are each comprised of one or more of these modules 20 assembled to create a resulting play structure having the desired shape and size. Referring to FIG. 1, according to a first preferred embodiment of the present invention, each module 20 comprises four side panels 22a, 22b, 22c and 22d connected to each other to encircle an enclosed space. Each side panel 22a, 22b, 22c and 22d has four sides, a left side 26a, a bottom side 26b, a right side 26c and a top side 26d. Each side panel 22a, 22b, 22c and 22d has a continuous frame retaining sleeve 24a, 24b, 24c or 24d provided along and traversing the four edges of its four sides 26a, 26b, 26c and 26d. A continuous frame member 28a, 28b, 28c or 28d is retained or held within each frame retaining sleeve 24a, 24b, 24c or 24d, respectively, to support each side panel 22a, 22b, 22c and 22d. Only the frame member 28c is shown in FIG. 1A; the other frame members 28a, 28b and 28d are not shown but are the same as frame member 28c. The continuous frame members 28a, 28b, 28c and 28d may be provided as one continuous loop, or may comprise a strip of material connected at both ends to form a continuous loop. The continuous frame members 28a, 28b, 28c and 28d are preferably formed of flexible coilable steel, although other materials such as plastics may also be used. The frame members should be made of a material which is relatively strong and yet is flexible to a sufficient degree to allow it to be coiled. Thus, each frame member 28a, 28b, 28c and 28d is capable of assuming two positions or orientations, an open or expanded position such as shown in FIG. 1, or a folded position in which the frame member is collapsed into a size which is much smaller than its open position (see FIG. 8(E)). Fabric or sheet material 30a, 30b, 30c and 30d extends across each side panel 22a, 22b, 22c and 22d, respectively, and is held taut by the respective frame members 28a, 28b, 28c and 28d when in its open position. The term fabric is to be given its broadest meaning and should be made from strong, lightweight materials and may include woven fabrics, sheet fabrics or even films. The fabric should be water-resistant and durable to withstand the wear and tear associated with rough treatment by children. The frame members 28a, 28b, 28c and 28d may be merely retained within the respective frame retaining sleeves 24a, 24b, 24c and 24c without being connected thereto. Alternatively, the frame retaining sleeves 24a, 24b, 24c and 24d may be mechanically fastened, stitched, fused, or glued to the frame members 28a, 28b, 28c and 28d, respectively, to retain them in position. FIG. 2A illustrates one preferred connection for connecting adjacent edges of two side panels 22a and 22d. The fabric pieces 30a and 30d are stitched at their edges by a stitching 34 to the respective sleeves 24a and 24d. Each sleeve 24a and 24d may be formed by folding a piece of fabric. The stitching 34 also acts as a hinge for the side panels 22a and 22d to be folded upon each other, as explained below. The connections for the three other pairs of adjacent edges may be identical. Thus, the connections on the left side 26a and the right side 26c of each side panel 22a, 22b, 22c and 22d act as hinge connections for connecting an adjacent side panel. At the top side 26d and the bottom side 26b of each side panel 22a, 22b, 22c and 22d, where there is no hinge connection to an adjacent side panel, the frame retaining sleeve 24a, 24b, 24c or 24b may be formed by merely folding over the corresponding fabric piece and applying a stitching 35 (see FIG. 1A). The fabric piece for the corresponding side panel may then be stitched to the sleeve. FIG. 2B illustrates a second preferred connection for connecting adjacent edges of two side panels 22a and 22d. As in the connection of FIG. 2A, the fabric pieces 30a and 30d are folded over at their edges at bottom side 26b and top side 26d to define the respective sleeves 24a and 24d. However, the frame retaining sleeves 24a and 24d converge at, or are connected to, one sleeve portion which interconnects side panels 22a and 22d to form a singular frame retaining sleeve 40 which retains the frame members 28a and 28d. Sleeve 40 may be formed by providing a tubular fabric, or by folding a piece of fabric, and applying a stitching 42 to its edges to connect the sleeve 40 to the fabric pieces 30a and 30d. Stitching 42 acts as a hinge for the side panels 22a and 22d. The connections for the three other pairs of adjacent edges may be identical. An upper panel 32 comprised of fabric 30e is connected to the upper edge 26d of each side panel 22a, 22b, 22c and 22d. Likewise, a lower panel 36 comprised of fabric 30f may also be connected to the bottom edge 26b of each side panel 22a, 22b, 22c and 22d. The upper panel 32 and the lower panel 36 are preferably made of the same type of fabric as the side panels 22a, 22b, 22c and 22d. The lower panel 36 is optional. An opening is provided in the upper panel 32 and openings 38 may be provided in some or all of the other panels 22a, 22b, 22c, 22d, and 36. These openings 38 may be of any shape (e.g., triangular, circular, rectangular, square, diamond, etc.) and size and are designed to allow children to crawl through them to enter or to exit the module 20. While the module 20 of FIG. 1 is shown and described as having four side panels, each having four sides, it will be appreciated that a module may be made of three or more side panels. Thus, the module of the present invention may take a variety of external shapes. However, each side panel of the module, regardless of its shape, is supported by at least one continuous frame member. FIGS. 8(A) through 8(E) describe the various steps for folding and collapsing the module 20 of FIG. 1 for storage. In FIG. 8(A), the first step consists of pushing in side panels 22a and 22d such that side panel 22d collapses upon side panel 22c and side panel 22a collapses upon side panel 22b. Then, in the second step shown in FIG. 8(B), the two side panels 22a and 22b are folded so as to be collapsed upon the two side panels 22c and 22d. The structure is then twisted and folded to collapse the frame members and side panels into a smaller shape. In the third step shown in FIG. 8(C), the opposite border 44 of the structure is folded in upon the previous fold to further collapse the frame members with the side panels. As shown in FIG. 8(D), the fourth step is to continue the collapsing so that the initial size of the structure is reduced. FIG. 8(E) shows the fifth step with the frame members and side panels collapsed on each other to provide for a small essentially compact configuration having a plurality of concentric frame members and layers of the side panels so that the collapsed structure has a size which is a fraction of the size of the initial structure. A second preferred embodiment of the present invention is shown in FIG. 3. A play structure 50 comprises three modules 52, 54 and 56 provided in an attached manner. Each module 52, 54 and 56 is essentially of the same construction as module 20, except that modules 52 and 56 share a common side panel 58, and modules 54 and 56 share a common side panel 60. The connections between adjacent side panels (i.e., the two side panel connections) may be the same as any of those illustrated in FIGS. 2A and 2B above. FIG. 4A illustrates a preferred four side panel connection along line 4--4 of FIG. 3, in which the four frame retaining sleeves 68a, 68b, 70a and 70b each retain a frame member 72a, 72b, 74a and 74b, respectively. Sleeves 68a and 70a, and side panels 62a and 64a, are connected by a stitching 75 and sleeves 68b and 70b, and side panels 58 and 60, are connected by a stitching 76. Each of the stitchings 75 and 76 also connect an interconnecting hinge fabric 77 which holds the two pairs of sleeves 68a, 70a and 68b, 70b together, and acts to hinge these two pairs of sleeves. Alternatively, FIG. 4B illustrates a second preferred connection in which the four frame retaining sleeves 68a, 68b, 70a and 70b, each formed by a separate stitching, converge to form, or are connected to, one singular frame retaining sleeve 88 which retains the frame members 72a, 72b, 74a and 74b. The singular frame retaining sleeve 88 is created by folding a fabric material, or providing a tubular fabric, and applying a stitching 86 to connect the sleeve 88 to the side panels 58, 60, 62a and 64a. Stitching 86 acts as a hinge for the side panels 58, 60, 62a and 64a. FIGS. 4C and 4D illustrate third and fourth preferred connections in which the four frame retaining sleeves 68a, 68b, 70a and 70b each retain a frame member 72a, 72b, 74a and 74b, respectively, and are stitched together with the fabric pieces of the side panels 62a, 64a, 58 and 60 by stitching 87 (FIG. 4C) and stitching 89 (FIG. 4D). The stitchings 87 and 89 also act to hinge the side panels 58, 60, 62a and 64a. FIG. 5A illustrates a preferred connection for the three side panel connection 80 along line 5--5 of FIG. 3, in which the three frame retaining sleeves 70b, 70c and 78a each retain a frame member 74b, 74c and 84a, respectively, and are held together by stitching 90. The fabric pieces of side panels 60, 64c and 66b are also stitched to the sleeves 70b, 70c and 78a by the stitching 90. Alternatively, FIG. 5B illustrates a second preferred connection in which the three frame retaining sleeves 70b, 70c and 78a, each formed by a separate stitching, converge to form, or are connected to, one singular frame retaining sleeve 94 which retains the frame members 74b, 74c and 84a. The singular frame retaining sleeve 94 is created by folding a fabric material and applying a stitching 92 to hold the sleeve 94 together with the side panels 60, 64c and 66b. The stitchings 90 and 92 act as hinges for the side panels 60, 64c and 66b. The three side panel connection 82 is identical to the three side panel connection 80 and is not further discussed herein. To fold and collapse the play structure 50, the side panels 62a and 62b of module 52 are pushed onto side panels 58 and 62c, respectively, the side panels 64a and 64b of module 54 are pushed onto side panels 60 and 64c, respectively, and the side panels 66a and 66b of module 56 are pushed onto side panels 58 and 60, respectively. Thereafter, combined side panels 62b and 62c are folded over to be collapsed upon the combined side panels 62a and 58, and combined side panels 64b and 64c are folded over to be collapsed upon the combined side panels 64a and 60. The combined side panels 66b, 60, 64a, 64b and 64c are then folded over and collapsed upon the combined side panels 66a, 58, 62a, 62b and 62c, thereby creating a stack of ten side panels. The combined stack of ten side panels may then be twisted and folded in the manner described above in connection with FIGS. 8(C)-8(E). Alternatively, the three modules 52, 54 and 56 of play structure 50 may be provided as three separate modules, each having four side panels. Each such module could be identical to module 20 of FIG. 1. The three separate modules may be connected by conventional attachment methods such as velcro, hooks, loops, fasteners or others, to create the play structure 50, or another structure with a different shape. For example, a child may choose to create a play structure having three linear modules 52, 54 and 56. The attachment method allows for convenient attachment and detachment. Each module may be folded and collapsed in the manner described in FIGS. 8(A)-8(E) for convenient storage. Regardless of whether the modules 52, 54 and 56 are provided separately or as an attached structure, the entire play structure 50 may be conveniently folded and collapsed, thereby making it convenient to move around the home, and requiring little storage space. If the modules 52, 54 and 56 are provided separately, the child further derives an additional variety of play since he or she can create play structures of different shapes. Additionally, the child may derive amusement by attempting to align the openings 90 and 92 in the interfacing side panels so that he or she can crawl from one module into another. Although the play structure 50 is shown as having three modules 52, 54 and 56, each being of the same size and shape, it will be appreciated that the present invention encompasses within its scope play structures having any number of modules. An example is illustrated in the third preferred embodiment of FIG. 6. The play structure 100 comprises a large module 102, and four but smaller modules 104, 106, 108 and 110, each connected to one of the four side panels of the large module 102 by a conventional attachment method, for example, velcro 112. A mesh 114 may be provided to cover an opening in the large module 102. The openings in the modules 102, 104, 106, 108 and 110 may be provided in varying shapes and sizes. Although the play structure 100 is shown as having four modules 104, 106, 108 and 110, these four modules may be provided in different shapes and sizes. The modules 102, 104 and 108 are modules which do not fall under the terms of the play structure defined in claim 1. The separate modules embodying the present invention may be provided or purchased on an individual basis, in different shapes and sizes, so that a child may be able to create a play structure of a desired shape and size. Alternatively, a specific number of differently shaped and sized modules may be packaged and sold together. In either case, the child will have the opportunity to create an endless variety of play structures at his or her disposal, thereby enhancing the amusement value of the modules, and stimulating creativity in the child by challenging the child to create as many different play structures as possible. FIG. 7 illustrates an additional application for the module 20. The module 20 may be sized such that it may be fitted around the body of a child, to act as part of a costume. The module 20 may then be able to support other bulky costumes, and would be especially useful for occasions such as halloween. For example, the child's head and arms could extend through opening 120 in the upper panel 32 and his legs could extend through an opening (not shown) in the lower panel 36. Alternatively, the module 20 could be sized small enough so that the child's arms could extend through the openings 122 and 124 in the side panels 22a and 22c, respectively. Further, the lower panel 36 could be omitted if desired. Further, the

Claims: A collapsible play structure (20) adapted to be supported on a surface and comprising: at least three side panels (22a,22b,22c,22d) and a roof (30e), each side panel comprising a frame member (28a,28b,28c,28d), having a folded and an unfolded orientation, and a fabric material (30a,30b,30c,30d) substantially covering each frame member, the fabric assuming the unfolded orientation of its associated frame member; each side panel (22a,22b,22c,22d) comprising a top side (26d), a bottom side (26b) and left and right sides (26a,26c) extending between the top and bottom sides, each side being straight; wherein the left side (26a) of each side panel (22a,22b,22c,22d) is connected and hinged to the right side (26c) of an adjacent side panel, and the right side of each side panel is connected and hinged to the left side of another adjacent side panel; and wherein the bottom side (26b) of each side panel is adapted to rest on the surface to support the play structure; characterised in that the roof comprises a single fabric cover (30e) connected to said top sides (26d) to form a flat upper fabric panel (32) in the unfolded configuration, and an opening (38), provided within the fabric cover (30e), of a shape and size to allow children to crawl through the opening to enter or exit the structure. The collapsible play structure (20) of Claim 1, comprising four side panels (22a,22b,22c,22d) and frame members (28a,28b,28c,28d). The collapsible play structure (20) of Claim 1 or 2, wherein at least one of the four side panels (22a,22b,22c,22d) comprises an opening (38). The collapsible play structure (20) of any preceding claim wherein each side panel (22a,22b,22c,22d) comprises a frame retaining sleeve (24a,24b,24c,24d) for retaining one of the frame members (28a,28b,28c,28d), and the frame retaining sleeves of adjacent side panels are stitched together to form a hinged connection (34). The collapsible play structure (20) of any one of Claims 1 to 3 wherein each side panel (22a,22b,22c,22d) comprises a frame retaining sleeve (40) for. holding a portion of one of the frame members (28a,28b,28c,28d), the frame retaining sleeves of adjacent side panels converging to form a singular retaining sleeve (40) which retains the adjacent sides of the adjacent frame members of the corresponding adjacent side panels. The collapsible play structure of any preceding claim, wherein all of the side panels (22a0,22b,22c,22d) have the same configuration.

Inventors: ZHENG YU, ZHENG, YU
Applicants: PATENT CATEGORY CORP, PATENT CATEGORY CORPORATION
Application year: 1995
Main classification: A63B9
IPC codes: E04H15, A63B9