Patent Publication Number: US-2023159223-A1

Title: Foldable Container and Foldable Supporting Frame Thereof, and Folding Method

Description:
CROSS REFERENCE OF RELATED APPLICATION 
     This is a Continuation-In-Part application that claims the benefit of priority under 35 U.S.C.§ 120 to a non-provisional application, application Ser. No. 17/716,967, filed on Apr. 8, 2022, which is a Continuation Application that claims the benefit of priority under 35 U.S.C.§ 119 to a non-provisional application, application Ser. No. 17/251,752, filed Dec. 11, 2020, which is a non-provisional application which is a U.S. National Stage under 35 U.S.C. 371 of the International Application Number PCT/CN2019/090087, filed Jun. 5, 2019, which claims priority to Chinese application numbers 201810575375.9, 201820871770.7, 201820871648.X and 201820871354.7, filed Jun. 6, 2018, and also a Continuation application that claims the benefit of priority under 35 U.S.C.§ 120 to a non-provisional application, application number 16/041,822, filed Jul. 22, 2018, which are incorporated herewith by reference in their entities. 
    
    
     BACKGROUND OF THE PRESENT INVENTION 
     Field of Invention 
     The present invention relates to a foldable appliance, and more particularly to a foldable container with foldable supporting frame and folding method thereof. 
     Description of Related Arts 
     Many foldable brackets are designed and aid for daily entertainment activities. Accordingly, a height of the bracket can be raised to lift up the appliance from the ground during the use of the appliance. As a result, the user does not have to bend or squat to use the appliance. Once the bracket is folded, a size of the bracket is reduced for storage and space saving. 
     Household temporary container, especially large size receptacle, is popular to be used as basin, container body or swimming pool for bathing, cleaning or playing purpose. This temporary container is convenient for most families. For example, the user is able to move this temporary container from place to place, such as bathroom or yard, as needed. Since this kind of container needs to have space large enough to hold at least a child or pet inside while having enough space to contain water or cleaning liquid, the conventional container is generally made in larger size. This kind of rigid container is convenient for most families also take wider space for using water, usually in outdoor area or bathroom. It is known that such relatively large container is not required to be used all the time or even daily use, this temporary container will not be the primary consideration for most families in view of storage, especially for urban families. Since the storage in urban family is very limited, it is a problem to store the temporary container when it is not in used. These defects of the temporary container cannot be solved and this temporary container is not practical in use. 
     Specifically, in order to reduce the space occupied by the temporary container when it is not in use, the current temporary container is designed to be inflatable, such that the temporary container is reused by inflating and deflating the temporary container. Usually, the temporary container is inflated by an inflator or inflatable pump. Before using the inflatable temporary container, it is necessary to initially place the inflatable temporary container in a preset position, and then use the inflatable pump to inflate the inflatable temporary container for at least five minutes for fully inflate the temporary container by filling a predetermined amount of gas to bias against the inner sidewall of the temporary container so as to support the shape of the temporary container. In other words, it is very troublesome to setup the temporary container. If the inflatable pump is damaged or lost, the inflatable temporary container cannot be used at all. Moreover, in order to facilitate the temporary container being folded after deflation, it is also necessary to provide an air exhaust vent at the temporary container. If the air exhaust vent is poorly sealed, air leakage is likely to occur. Once the inflatable temporary container has an air leakage problem, it is easy to cause the water or cleaning liquid contained in the temporary container to leak out, especially for the temporary container used in the living room. In other words, if the water or cleaning fluid leaks out of the temporary container, it will inevitably cause water damage to the home environment. Furthermore, during the manufacturing process of the inflatable temporary container, the air exhaust vent is affixed to the sidewall of the temporary container to communicate with an interior air chamber of the inflatable temporary container. It is difficult to ensure the tightness between the sidewall and the air exhaust vent. 
     For the temporary container made of plastic, it must be stored indoors in order to prevent the plastic aging from directly exposing under the sun. Therefore, it is necessary to save a larger space for storing the temporary container. In some cases, the entire temporary container is used to store various items inside the container during storage, such that these items must be placed somewhere in the storage room. However, before the next use of the temporary container, additional steps are required to take out the items and clean the container before use. 
     In addition to liquid containers, some cooking utensils, such as grills, table tops, etc., have similar problems. One of the major problems is stability after it is setup. Since the foldable bracket is movable, it is a major concern how to keep the stability of the foldable bracket when it is unfolded. The existing foldable bracket is basically constructed to have a X-shaped pivotal structure. This structure provides high mobility and is easy to deform during use. The foldable angle may increase permanently as the structure is frequently used. 
     In addition, the temporary container is directly placed on the ground when it is used, wherein the user will need to bend over when helping children or pets to clean, which is likely to hurt health the user, especially the back of the user. 
     Even though the existing foldable brackets can be folded, the folding operation thereof requires many steps. Basically, it requires two hands to close the bracket, and may also need to rotate and fold different parts of the bracket frame. So, the traditional folding process of the foldable bracket is very troublesome. Since the folding process is complicated and difficult, the user will merely keep the temporary container being unfolded all the time, which fails to achieve the main purpose of folding up the temporary container for storage to save the space. 
     SUMMARY OF THE PRESENT INVENTION 
     The invention is advantageous in that it provides a foldable container and a foldable supporting frame thereof and its folding method, wherein the foldable container can be folded to reduce the overall size thereof when the foldable container in not in use. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein the space occupied by the foldable container after being folded is greatly reduced to save the storage space of the foldable container and to allow the folded foldable container to be easily carried. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein when the foldable supporting frame is unfolded, the foldable supporting frame is raised and supported at a predetermined height for stably supporting the container. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein the size of the foldable supporting frame is enlarged when it is unfolded and the size of the foldable supporting frame is reduced when it is folded. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein the foldable container can be conveniently operated to quickly convert the foldable container between the folded mode and the unfolded mode. The folding and unfolding operations of the foldable container does not require any tool to move foldable container between the folded mode and the unfolded mode. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein the foldable supporting frame is folded by a single pulling force without additional force or steps, and then the foldable supporting frame is folded up and is ready for storage or carry. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein the foldable supporting frame is easily pulled for being folded up and stored. Therefore, the folded foldable supporting frame can fit in a narrow storage space. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein the folded foldable supporting frame is easily and quickly unfolded for use without any tools or devices so as to save time and to minimize any complicated steps. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein the foldable supporting frame can be used as a support for liquid containers or household utensils. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein the foldable supporting frame can support the appliance at a predetermined height from the ground, so as to keep the water or cleaning liquid from the ground for maintaining relative hygiene and cleanliness. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein the foldable container allows the water or cleaning liquid contained therein being automatically flowed out and drained. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein the foldable container is easily cleaned and is easy to actuate and keep dry. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein when the foldable supporting frame is folded, the container is automatically folded at the same time for facilitating the folding operation of the foldable container to convert from the unfolded mode to the folded mode. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein when the foldable supporting frame is unfolded, the container is automatically unfolded for facilitating the unfolding operation of the foldable container to convert from the folded mode to the unfolded mode. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein the container is pulled and folded to fold up the foldable supporting frame at the same time without any direct operation of the foldable supporting frame, so as to automatically move the foldable supporting frame from the unfolded mode to the folded mode. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein when the foldable container is in the unfolded mode, the foldable container can be pulled by a pulling action to easily fold up the foldable container from the unfolded mode to the folded mode. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein when the foldable container is at the unfolded mode, the foldable container allows a one-handed pulling operation to simplify the folding operation of the foldable container. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein the foldable supporting frame can support the container to raise at a predetermined height so as to allow the user comfortably cleaning for children or pets, as an example. In other words, the foldable container allows the user to wash the child or pet in a standing position, which is beneficial to the health of the user, and is particularly beneficial to the back of the user. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein the foldable supporting frame is supported and raised at a predetermined height for the user to operate comfortably without bending the back of the user. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein the shape of the foldable supporting frame is restricted when it is folded without being pulled, such that the foldable supporting frame provides a stable supporting ability. 
     Another advantage of the invention is to provide a foldable container and a foldable supporting frame thereof and its folding method, wherein the foldable supporting frame will not be folded accidentally, such that foldable supporting frame will maintain its stability when it is unfolded and in use. 
     Additional advantages and features of the invention will become apparent from the description which follows and may be realized by means of the instrumentalities and combinations particular point out in the appended claims. 
     According to the present invention, the foregoing and other objects and advantages are attained by a foldable container, which comprises: 
     a foldable supporting frame; 
     at least one operation switch, wherein the operation switch is coupled with the foldable supporting frame to move the foldable supporting frame between an unfolded mode and a folded mode through a pulling operation of the operation switch; and 
     a container body, wherein the container body is supported on the foldable supporting frame, wherein the container body has a surrounding edge defining an opening thereof surrounded by the edge, wherein at the unfolded mode, the opening of the container body is opened, wherein at the folded mode, the opening of the container body is closed, wherein the container body is automatically folded as the foldable supporting frame is moved from the unfolded mode to the folded mode. 
     In one embodiment of the present invention, the container body is connected to the operation switch, wherein the operation switch is actuated by a pulling operation of the container body in order to fold up the foldable supporting frame. 
     In one embodiment of the present invention, the foldable supporting frame is driven to fold by a folding of the container body, wherein the foldable supporting frame is maintained at the unfolded mode by the support of the operation switch, such that when the operation switch is actuated to release the support of the foldable supporting frame, and the foldable supporting frame is moved from the unfolded mode to the folded mode. 
     In one embodiment of the present invention, the foldable supporting frame comprises two folding arms and at least four supporting legs, wherein each of the folding arms is supported by the supporting legs, wherein the folding arms are pivotally connected with each other at the operation switch, wherein the folding arm and the supporting leg are pivotally rotated with each other. 
     In one embodiment of the present invention, the foldable supporting frame further comprises a pivot shaft, wherein each of the supporting legs is pivotally connected to each of the folding arms about the pivot shaft, wherein when the folding arm is rotated, the supporting leg is driven by the folding arm to rotate about the pivot shaft. 
     In one embodiment of the present invention, the folding arm further comprises a switch rod, wherein the switch rod is disposed at an end of one of the folding arms, wherein in the unfolded mode, the switch rod is supported by the operation switch to limit the movement between the two folding arms of the foldable support frame. 
     In one embodiment of the present invention, the folding arm further comprises a rotating rod, wherein two of the folding arms are pivotally connected to each other about the rotating rod. 
     In one embodiment of the present invention, the rotating rod is placed in the operation switch. 
     In one embodiment of the present invention, one of the folding arms is affixed to the operation switch, and another one is freely placed on the operation switch to form a fixed folding arm and a free rotatable folding arm respectively. The fixed folding arm and the rotating rod are arranged on the operation switch while the free rotatable folding arm is movably arranged on the operation switch about the rotating rod. 
     In one embodiment of the present invention, the end of the free rotatable folding arm is further transversely connected with the switch rod, wherein when the folding arm is unfolded, the free rotatable folding arm is parallel to the fixed folding arm while the switch rod is supported by the operation switch. 
     In one embodiment of the present invention, the operation switch comprises a main body, a slider and a resilient member, wherein the slider is movably disposed on the main body, the resilient member is connected to the main body, and the slider is affixed inside the main body. 
     In one embodiment of the present invention, the main body is constructed and shaped to retain at the end of the folding arm. 
     In one embodiment of the present invention, the free rotatable folding arm is rotatably held on the main body, wherein the fixed folding arm is firmly held on the main body. 
     In one embodiment of the present invention, the main body is constructed to have two fixed arm cavities, two free arm cavities and a slider cavity, wherein the end of the fixed folding arm is affixed to the fixed arm cavity, and the rotating rod is laterally arranged in the fixed arm cavity, wherein the end of the free rotatable folding arm is movably placed in the free arm cavity and is rotatably connected about the rotating rod. 
     In one embodiment of the present invention, the slider has a supporting end, wherein the supporting end is formed with a unidirectional inclined sloping surface, wherein the supporting end is pushed by the switch rod to move, and the supporting end is configured to support the weight of the switch rod without being pushed back. 
     In one embodiment of the present invention, the operation switch is actuated by pulling a handle provided on the container body in order to fold the foldable supporting frame, wherein the operation switch further comprises a pulling strap, wherein the slider has a pulling end firmly connected to the pulling strap, wherein the pulling strap has one end connecting to the handle and the opposed end connecting the pulling end of the slider. 
     In one embodiment of the present invention, the slider is moved back to the slider cavity under the elastic force of the resilient member by pulling the pulling strap. 
     In one embodiment of the present invention, each of the supporting legs is coupled to an extension leg to raise the height of the container body. 
     In one embodiment of the present invention, the container body is constructed to have a surrounding wall and a bottom wall sealingly connected to the surrounding wall to form a bowl shape of the container body, wherein the bottom wall has a drain port for draining the liquid contained in the container body. 
     In accordance with another aspect of the invention, the present invention comprises a foldable supporting frame, which comprises: 
     two folding arms; 
     at least four supporting legs; and 
     at least one operation switch, wherein each of the folding arms is supported by the supporting leg, wherein the supporting leg is pivotally rotated with the folding arm, wherein the folding arms are pivotally connected to the operation switch, wherein the operation switch is arranged on the folding arm to move the folding arms between an unfolded mode and a folded mode via a pulling force, wherein the folding arm is maintained in the unfolded mode by a support of the operation switch, wherein when the switch is actuated to release the support of the folding arm, the folding arm is moved from the unfolded mode to the folded mode. 
     In accordance with another aspect of the invention, the present invention comprises a foldable supporting frame, which comprises: 
     a supporting frame; and 
     at least one operation switch, wherein the switch is arranged on the supporting frame and is actuated through a pulling operation by a pulling force to move the supporting frame between an unfolded mode and a folded mode, wherein the supporting frame is maintained at the unfolded mode by a support of the operation switch, wherein the operation switch is actuated to release the support of the supporting frame so as to automatically move the supporting frame from the unfolded mode to the folded mode, wherein supporting frame comprises two folding arms and at least four supporting legs, wherein each of the folding arms is supported by the supporting legs, wherein the folding arms are pivotally connected to the operation switch and are asymmetrical to each other, wherein the folding arm and the supporting leg are pivot and rotate mutually. 
     In one embodiment of the present invention, the operation switch is movably connected to the supporting frame, wherein the operation switch is actuated via a pulling force to fold the supporting frame. 
     In one embodiment of the present invention, the supporting frame is opened to be unfolded and supported by the operation switch. 
     In one embodiment of the present invention, the supporting frame further comprises a pivot shaft, wherein each of the supporting legs is pivotally connected to each of the folding arms about the pivot shaft, wherein when the folding arm is rotated, the supporting leg is driven to rotate about the pivot shaft by the folding arm. 
     In one embodiment of the present invention, the end of the free rotatable folding arm is further connected transversely to the switch rod, wherein the switch rod can be supported by the switch, wherein when the folding arm is unfolded, the free rotatable arm is parallel to the fixed folding arm while the switch rod is supported by the operation switch. 
     In one embodiment of the present invention, the foldable supporting frame further comprises a container body, wherein the container body is arranged on the supporting frame, and the container body is folded to be closed as the supporting frame is folded, wherein the container body is opened as the supporting frame is unfolded. 
     In accordance with another aspect of the invention, the present invention comprises a foldable supporting frame, which comprises: 
     a supporting frame; and 
     at least one operation switch, wherein the operation switch is arranged on the supporting frame and is actuated through a pulling operation by a pulling force to move the supporting frame between an unfolded mode and a folded mode, wherein the supporting frame is maintained at the unfolded mode by a support of the operation switch, wherein the operation switch is actuated to release the support of the supporting frame so as to automatically move the supporting frame from the unfolded mode to the folded mode, wherein the operation switch comprises a main body, a slider and a resilient member, wherein the slider is movably arranged on the main body, wherein the resilient member is connected to the main body and the slider, wherein the slider is affixed inside the main body. 
     In one embodiment of the present invention, the foldable supporting frame further comprises a container body, wherein the container body has an edge and an opening formed around the edge, wherein at the unfolded mode, the opening of the container body is opened, wherein at the folded mode, the opening of the container body is closed, wherein the container body is automatically folded as the foldable supporting frame is moved from the unfolded mode to the folded mode. 
     In accordance with another aspect of the invention, the present invention comprises a folding method for a foldable supporting frame, which comprises the steps of: 
     folding a container body via a pulling force; and 
     when folding up the container body, folding the foldable supporting frame from the unfolded mode to the folded mode, wherein at the unfolded mode, the container body is supported by the foldable supporting frame, and at the folded mode, the foldable supporting frame and the container body are folded together. 
     Still further objects and advantages will become apparent from a consideration of the ensuing description and drawings. 
     These and other objectives, features, and advantages of the present invention will become apparent from the following detailed description, the accompanying drawings, and the appended claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a perspective view of a foldable container at an unfolded mode according to a first preferred embodiment of the present invention. 
         FIG.  2    is a perspective view of the foldable container at a folded mode according to the above first preferred embodiment of the present invention. 
         FIG.  3 A  is an exploded perspective view of the foldable container at the folded mode according to the above first preferred embodiment of the present invention. 
         FIG.  3 B  illustrates the supporting structure of the foldable container at the unfolded mode according to the above first preferred embodiment of the present invention. 
         FIG.  3 C  is a perspective view of a container body of a foldable container according the above first preferred embodiment of the present invention, wherein two fixing ribs are not inserted into an edge of a surrounding wall of the container body. 
         FIG.  3 D  is a perspective view of the container body of the foldable container according to the above first preferred embodiment of the present invention, wherein two fixing ribs are inserted into the edge of the surrounding wall. 
         FIG.  3 E  is a perspective view of the container body assembly of the foldable container according to the above first preferred embodiment of the present invention. 
         FIG.  3 F  is a perspective view illustrating the process for mounting top supporting arms to the container body of the foldable container according to the above first preferred embodiment of the present invention. 
         FIG.  3 G  is a perspective view of the top supporting arms of the foldable container according to the above first preferred embodiment of the present invention. 
         FIG.  3 H  are sectional views illustrating the edge of the surrounding wall being mounted to the top supporting arms of the foldable container according to the above first preferred embodiment of the present invention. 
         FIG.  3 I  is a perspective view of the assembled container body assembly of the foldable container according to the above first preferred embodiment of the present invention. 
         FIG.  3 J  is a perspective view of the foldable container being in the unfolded state according to the above first preferred embodiment of the present invention. 
         FIG.  3 K  is a perspective view of the foldable container in the folded state according to the above first preferred embodiment of the present invention. 
         FIG.  4    is an exploded perspective view of the supporting frame of the foldable container according to the above first preferred embodiment of the present invention. 
         FIG.  5    illustrates an application of the foldable container at the unfolded mode according to the above first preferred embodiment of the present invention. 
         FIGS.  6 A to  6 C  illustrate an unfolding operation of the foldable container according to the above first preferred embodiment of the present invention. 
         FIGS.  7 A to  7 C  illustrate a folding operation of the foldable container according to the above first preferred embodiment of the present invention. 
         FIG.  8    is a perspective view of a foldable container at an unfolded mode according to a second preferred embodiment of the present invention. 
         FIGS.  9 A to  9 B  illustrate an unfolding operation of the foldable container according to the above second preferred embodiment of the present invention. 
         FIGS.  10 A to  10 B  illustrate a folding operation of the foldable container according to the above second preferred embodiment of the present invention. 
         FIG.  11    is a perspective view of a foldable container at an unfolded mode according to a third preferred embodiment of the present invention. 
         FIG.  12    illustrates an application of the foldable container at the unfolded mode according to the above third preferred embodiment of the present invention, illustrating the foldable container serving as a rocking container. 
         FIG.  13    illustrates an application of the foldable container at the unfolded mode according to the above third preferred embodiment of the present invention, illustrating the foldable container serving as a baby crib. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The following description is disclosed to enable any person skilled in the art to make and use the present invention. Preferred embodiments are provided in the following description only as examples and modifications will be apparent to those skilled in the art. The general principles defined in the following description would be applied to other embodiments, alternatives, modifications, equivalents, and applications without departing from the spirit and scope of the present invention. 
     It is appreciated that the terms “longitudinal”, “transverse”, “upper”, “lower”, “front”, “rear”, “left”, “right”, vertical”, “horizontal”, “top”, “bottom”, “exterior”, and “interior” in the following description refer to the orientation or positioning relationship in the accompanying drawings for easy understanding of the present invention without limiting the actual location or orientation of the present invention. Therefore, the above terms should not be an actual location limitation of the elements of the present invention. 
     It is appreciated that the terms “one”, “a”, and “an” in the following description refer to “at least one” or “one or more” in the embodiment. In particular, the term “a” in one embodiment may refer to “one” while in another embodiment may refer to “more than one”. Therefore, the above terms should not be an actual numerical limitation of the elements of the present invention. 
     Referring to  FIGS.  1  to  13    of the drawings, a foldable container according to a preferred embodiment of the present invention is illustrated, wherein the foldable container is suitable for containing water or liquid for cleaning therein to serve as a container body or a swimming pool. The foldable container comprises a foldable supporting frame  10 , an operation switch  20  being operated through a pulling operation by a pulling force to operate and move the foldable supporting frame  10  between an unfolded mode and a folded mode, and a container body  30  being placed and supported on the foldable supporting frame  10 . In other words, when the foldable supporting frame  10  is unfolded, the container body  30  is also unfolded for containing the liquid therein. When the foldable supporting frame  10  is moved to its folded mode, the container body  30  and the foldable supporting frame  10  are folded together, such that the entire foldable container can be stored in a folded state. 
     Preferably, when the foldable supporting frame  10  is unfolded, the container body  30  is automatically unfolded along with the folding operation of the foldable supporting frame  10 . In other words, during the folding process of the foldable supporting frame  10 , the container body  30  is automatically folded when the foldable supporting frame  10  is folded. 
     It is worth mentioning that the present invention provides a single pulling operation referring to the one-way mode when the foldable container is operated to moved and converted from the unfolded mode to the folded mode. In other words, operating the foldable container at the same direction can move the foldable container from the unfolded mode to the folded mode. Preferably, the single pulling operation in the present invention refers to the one-way pulling operation when operating the foldable container to move from the unfolded mode to the folded mode. In other words, pulling the foldable container at the same direction at one time can move the foldable container from the unfolded mode to the folded mode. It is appreciated that those skilled in the art should understand that pulling the foldable container at the same direction in different stages can also move the foldable container from the unfolded mode to the folded mode. For example, pulling the foldable container twice toward the same direction can also move the foldable container from the unfolded mode to the folded mode. As shown in  FIGS.  1  and  2   , the container body  30  according to the preferred embodiment is fixedly coupled at the foldable supporting frame  10 . The container body  30  is driven by the foldable supporting frame  10  to be folded and unfolded. When the container body  30  is needed to be unfolded, the foldable supporting frame  10  is operated to unfold the container body  30 . It is worth mentioning that the foldable container can be unfolded as a whole system without any additional step. No additional step is required to open up the container body  30  or improve the stability of the container body  30 . When the foldable supporting frame  10  is operated to expand and unfolded, the container body  30  is simultaneously expanded at its setup state. In addition, folding up the container body  30  by folding the foldable supporting frame  10  is similar When the foldable supporting frame  10  is folded, the foldable supporting frame  10  will drive the container body  30  to fold. Therefore, the folding or unfolding of the foldable container can be easily operated. 
     As shown in  FIG.  3 A , the foldable supporting frame  10  comprises at least two top supporting arms  11 , at least two folding arms  12 , and at least four supporting legs  13 . Each of the top supporting arms  11  is placed on the folding arm  12  and the supporting leg  13 , wherein the folding arm  12  and the top supporting arm  11  are supported by the supporting leg  13 . Preferably, the number of the top supporting arms  11 , the folding arms  12  and the supporting legs  13  are corresponding, wherein each of the top supporting arm  11  and each of the folding arms  12  are correspondingly supported by the supporting leg  13 . 
     It is worth mentioning that the folding arms  12  are pivotally connected to each other by the operation switch  20 . The rotation of the folding arm  12  is configured to drive the folding or unfolding movement of the top supporting arm  11  and the supporting leg  13 . When the foldable supporting frame  10  is in the folded mode, the two folding arms  12  are arranged to be folded and overlapped each other. When the foldable supporting frame  10  is in the unfolded mode, the two folding arms  12  are arranged to be unfolded to open and extended flatly. Therefore, when the folding arm  12  is folded, the top supporting arm  11  and the supporting leg  13  are folded following the folding operation of the folding arm  12 . Therefore, by only folding the folding arm  12 , the entire foldable supporting frame  10  is folded, which is convenient in operation. When the foldable supporting frame  10  is folded, the container body  30  is correspondingly folded. 
     As shown in  FIG.  3 A , the operation switch  20  is connected to two ends of the two folding arms  12  to control the foldable supporting frame  10  to switch between folding and unfolding. The switch  20  can be further operated by being pulled to move the folding arm  12  from the unfolded mode to the folded mode. In other words, when the foldable supporting frame  10  is in the unfolded mode, the operation switch  20  is pulled to drive and move the folding arm  12 . In other words, the folding arm  12  is folded due to gravity and loss of supportability. Though the pulling operation, the operation switch  20  is pulled to fold the foldable supporting frame  10 . 
     Specifically, the two folding arms  12  are pivotally connected with each other around a rotating rod  121 , wherein the rotating rod  121  is placed between the ends of the two folding arms  12 . The rotating rod  121  is installed into the operation switch  20 . The two folding arms  12  are rotated around the operation switch  20 , wherein the operation switch  20  is configured to restrict the rotations of the folding arms  12  relative to each other. According to the first embodiment, one of the folding arms  12  is fixed to the operation switch  20 , while another folding arm  12  is relatively free to rotate relative to the operation switch  20 . In other words, one of the folding arms  12  is defined as a fixed folding arm  1202 , and another folding arm  12  is a free rotatable folding arm  1201 . The fixed folding arm  1202  is installed into the operation switch  20  together with the rotating rod  121 . The free rotatable folding arm  1201  is rotatably coupled at the operation switch  20  around the rotating rod  121 . 
     In addition, the rotation of the fixed folding arm  1202  and the free rotatable folding arm  1201  around the rotating rod  121  are asymmetrical. In other words, when the fixed folding arm  1202  and the free rotatable folding arm  1201  are folded with each other, the fixed folding arm  1202  and the free rotatable folding arm  1201  are staggered and stacked with each other and will not contact or collide with each other. On one side, the fixed folding arm  1202  and the free rotatable folding arm  1201  will not be mechanically damaged during the folding and unfolding operations. On the other side, after folding, a retention channel is formed between the fixed folding arm  1202  and the free rotatable folding arm  1201 . 
     It is worth mentioning that the end of the free rotatable folding arm  1201  is further transversely connected to a switch rod  122 . When the folding arm  12  is flatly unfolded, the switch rod  122  is firmly supported by the operation switch  20 , wherein the free rotatable folding arm  1201  is parallel to the fixed folding arm  1202 . When the switch rod  122  is supported, the free rotatable folding arm  1201  is relatively supported on the same side of the fixed folding arm  1202 . When the operation switch  20  is configured to keep supporting the switch rod  122 , the free rotatable folding arm  1201  is configured to remains relative parallel to the fixed folding arm  1202 . When the switch rod  122  is released from the operation switch  20 , the free rotatable folding arm  1201  will lose its support. Under the action of gravity force, the free rotatable folding arm  1201  will rotate around the rotating rod  121  and fold toward the fixed folding arm  1202 . In other words, when the switch rod  122  is supported by the operation switch  20 , due to the restriction of the operation switch  20 , the folding arm  12  is unfolded and is difficult to change its position. Once the switch rod  122  is detached from the operation switch  20 , the folding arm  12  can rotate around the rotating rod  121  to be folded. Therefore, the folding arm  12  is controlled by the operation switch  20  for controlling the movement of the folding arm  12 , wherein the folding position or the unfolding position of the foldable supporting frame  10  is indirectly controlled by the operation switch  20 . 
     In addition, the supporting legs  13  and the folding arms  12  are pivotally connected to pivot shafts  130  respectively. When the folding arm  12  is operated to rotate around the rotating rod  121 , the angle and distance between the folding arms  12  are changed while the supporting leg  13  is driven to rotate around the pivot shafts  130 . Each of the supporting legs  13 , each of the folding arms  12 , and the pivot shaft  130  are formed into a rotatable X-shaped frame. Since the movements of the folding arms  12  are transmitted to the supporting legs  13 , the supporting legs  13  are automatically moved for being further folded or unfolded via the folding arms  12 . 
     Furthermore, as shown in  FIG.  3 B , the container body  30  is detachably connected to the foldable supporting frame  10 . The container body  30  can be further removed from the folding supporting frame  10  for being cleaned or disinfected. 
     Furthermore, the top supporting arm  11  is driven to rotate by the supporting leg  13  via a folding assembly  110 , wherein the folding assembly  110  is installed at the top of the supporting leg  13 . When the supporting leg  13  is folded or unfolded as the folding arm  12  rotates, the top supporting arm  11  is driven to rotate around the folding assembly  110 . 
     Each of the supporting legs  13 , each of the top supporting arms  11 , and the folding assembly  110  are formed into a rotatable inversed V-shaped frame. Since the folding assembly  110  is driven, it is not necessary to fold or unfold the supporting leg  13  because the movement of the folding assembly  110  will be transmitted to the supporting leg  13 . 
     In detail, the folding assembly  110  comprises a rotatable base  111  and a linkage unit  112 . The rotatable base  111  is coupled at the end of the top supporting arm  11  to receive the upper end of the supporting leg  13  in the rotatable base  111 . The linkage unit  12  comprises two linkage members  1121  respectively mounted on the top end of the supporting leg  13  and the end of the top supporting arm  11 . The linkage members  1121  are connected by link shafts  1122 , so that the angle between each top supporting arm  11  and each supporting leg  13  can be controlled and has a maximum angle limitation. Each of the top supporting arms  11 , each of the supporting legs  13  and the linkage member  1121  are formed in an A shape, wherein the top supporting arms  11  will drive the supporting legs  13  to move, while the supporting legs  13  will drive the top supporting arm  11  to move around the rotatable base  111 . 
     Preferably, by operating the operation switch  20  to release the switch rod  122  and to fold the folding arm  12 , the supporting leg  13  and the top supporting arm  11  are corresponding folded. Preferably, the top supporting arm  11  is expanded to further drive the folding arm  12  to be supported on the operation switch  20  and to drive the supporting leg  13  to expand. 
     Furthermore, each of the supporting legs  13  is configured for correspondingly installing an extension leg  14  for increasing the height of the top supporting arm  11  and keeping the container body  30  on the top supporting arm  11  in a preset position, as shown in  FIG.  5   . Through the extension legs  14 , the container body  30  is supported and raised above the ground for hygienic and cleaning purpose while the water or cleaning liquid is contained in the container body  30 . As a result, the user can comfortably use the container body  30  without bending the user&#39;s body. 
     The container body  30  comprises a surrounding wall  31  and a bottom wall  32  sealingly connected to the surrounding wall  31  to form the container body  30  having a bowl shape and a surrounding edge  310  defining an opening thereof surrounded by the edge  310 . The edge  310  of the surrounding wall  31  is disposed on the top supporting arm  11  of the foldable supporting frame  10 . In one alternative mode of the present invention, the container body  30  is detachably mounted on the top supporting arm  11  for replacement. 
     The container body  30  further comprises at least one pocket  33  placed on the surrounding wall  31 . The pocket  33  is configured for keeping other items therein to facilitate the reaching of items when using liquid for cleaning or playing in the container body  30 . 
     Preferably, as shown in  FIG.  3 B , the edge  310  of the surrounding wall  31  is constructed to have a fixing rib  312  and an edge sleeve  311 , wherein the fixing rib  312  is configured to pass through the edge sleeve  311 , such that the edge  310  is supported with its shape. The top supporting arm  11  further comprises a rod body  101 , wherein the rod body  101  has a fixing cavity  102  formed on one side of the rod body  101 . The fixing cavity  102  is extended through the rod body  101 , wherein the edge  310  of the surrounding wall  31  is installed inside the fixing cavity  102 . 
     Specifically, the fixing rib  312  is extended into the fixing cavity  102  of the rod body  101 , such that the edge sleeve  311  to be carried is suspended and fixed to the rod body  101 . In the first embodiment, the fixing cavity  102  of the rod body  101  has a U-shaped configuration, wherein the fixing rib  312  is configured to enter from an opening, which is a slot  103 , of the fixing cavity  102  into the fixing cavity  102 . Furthermore, the edge sleeve  311  is formed in a U-shape and is also connected to the rod body  101  of the top supporting arm  11  in a U-shape. When the surrounding wall  31  is needed to be disassembled, the fixing rib  312  is relatively removed from the fixing cavity  102  of the rod body  101 , wherein the fixing rib  312  is completely removed from the top supporting arm  11 . Preferably, the rod body  101  is pulled to release the supportability of the edge sleeve  311 . More preferably, the fixing rib  312  is detachably connected to the sleeve edge  311 , such that the sleeve edge  311  can be further folded or cleaned. 
     Referring to  FIGS.  3 C to  3 K  of the drawings, the structure for connecting the edge  310  of the surrounding wall  31  of the container body  30  with the top supporting arm  11  is illustrated. Accordingly, the present invention provides a container assembly  300  which comprises the container body  30  and two top supporting arms  11  which are embodied as two container arms, the edge  310  of the surrounding wall  31  is mounted to the two top supporting arms  11  through the structure of the fixing rib  312 , the edge sleeve  311  and the rob body  101  of each top supporting arm  11 . 
     More specifically, the edge sleeve  311  of the surrounding wall  31  has two mounting holes  3111  and two retaining channels  3112 , each mounting hole  3111  is communicated to the corresponding retaining channel  3112 , the edge  310  of the surrounding wall  31  comprises two fixing ribs  312  which are respectively inserted into the two retaining channels  3112  through the two mounting holes  3111 , so that the two fixing ribs  312  are respectively retained in the two retaining channels  3112 . 
     Referring to  FIGS.  3 C to  3 K  of the drawings, the container assembly  300  comprises two top supporting arms  11 , each of the top supporting arms  11  comprises the rod body  101  having the fixing cavity  102  and the slot  103  extended along a length of the rod body  101  and communicated to the fixing cavity  102 . 
     As shown in  FIGS.  3 D to  3 H  of the drawings, each rod body  101  is sleeved on the edge sleeve  311  of the surrounding wall  31  through a position corresponding to the mounting hole  3111  of the edge sleeve  311 , so that the edge  310  of the surrounding wall  31  comprising the two fixing ribs  312  and the edge sleeve  311  are respectively received and retained in the fixing cavities  102  of the two rod bodies  101  of the two top supporting arms  11 . 
     Accordingly, the foldable supporting frame  10  is a rigid frame that is made of a material selected from the group consisting of wood, metal, metal alloy, and plastic. Metal of the material of the foldable supporting frame  10  may be Iron, Copper, or Aluminium. The container body  30  of the container assembly  300  is preferably a flexible body that is made of a flexible water-proof material such as PE (Polyethylene), PVC (Polyvinyl Chloride), PP (Polypropylene) and TPU (Thermoplastic Urethane). Accordingly, the flexible container body  30  is constructed to be easy to be folded up with a folding of the foldable supporting frame  10  and unfolded with an unfolding of the foldable supporting frame  10 , when the foldable supporting frame  10  is unfolded, the foldable supporting frame  10  is supported in the unfolded mode by the operation switch  20  to provide a rigid support to the container body  30 , and the operation switch  20  is able to be operated to release the rigid support of the foldable supporting frame  10  when the foldable supporting frame  10  is operated from the unfolded mode to the folded mode. 
     The two top supporting arms  11  can be made of rigid material such as metal, metal alloy, and plastic. The two fixing ribs  312  can be flexible rods that allow each fixing rib  312  to pass through the corresponding curved retaining channel  3112  which may have a semicircle shape. When the two fixing ribs  312  are respectively retained in the two retaining channels  3112  of the edge sleeve  311 , the material of the edge sleeve  311  is sandwiched between the inner surface around the fixing cavity  102  of the rod body  101  of each top supporting arm  11  and the fixing ribs  312 , so that the edge sleeve  311  of the edge  310  of the surrounding wall  31  is firmly retained and mounted by the two top supporting arms  11 . The shape and size of the fixing ribs  312  are respectively matched with the fixing cavities  102  of the rod bodies  101  of the two top supporting arms  11 , such as that the fixing ribs  312  are engaged with the corresponding two fixing cavities  102  of the rod bodies  101  of the two top supporting arms  11  by a snap-fit engaging manner or an interference fit engaging manner, so as to prevent the fixing ribs  312  from slipping out of the fixing cavities  102 . 
     As an example, the two top supporting arms  11  can be made of Aluminium, and each of the rod body  101  is an aluminium rod. The two top supporting arms  11  thus can provide a relatively rigid support to the container body  30  and the two top supporting arms  11  define an opening  34  of the container assembly  300 , the opening  34  is also defined and surrounded by the surrounding wall  31  of the container body  30 . Since the two top supporting arms  11  are made of rigid material, the shape of the opening  34  of the container assembly  300  is maintained. The engagement between the top supporting arms  11  and the edge  310  comprising the fixing ribs  312  and the edge sleeve  311  enables that the edge  310  defining the two retaining channels  3112  has a relatively flat surface and the surrounding wall  31  also has a flat surface that is not easy to form a wrinkle surface, so that the aesthetic appearance of the container assembly  300  is further enhanced. 
     In addition, the engagement between the two top supporting arms  11  and the edge  310  comprising the fixing ribs  312  and the edge sleeve  311  also enables that the edge  310  of the container body  30  is detachably mounted to the two top supporting arms  11 , so that the container body  30  can be easy to be detached from the two top supporting arms  11  for cleaning. 
     Accordingly, the top side of the container assembly  300  is arranged with the two top supporting arms  11 , so that the aesthetic appearance of the container assembly  300  is enhanced. In other alternative modes, the two top supporting arms  11  may be flexible rods that may be inserted into the edge sleeve  311 , however, the structural strength of the container assembly  300  may be relatively weak and the shape of the opening  34  of the container assembly  300  may not be guaranteed. Two rigid supporting arms  11  are not suitable for being directly inserted into the retaining channels  3112  through the mounting holes  3111 , since the operation is difficult and the surface of the surrounding wall  31  is easy to be corrugated. Alternatively, the two top supporting arms  11  may be rigid rods that are placed between the two layers of the material of the edge sleeve  311  and then the two layers of the material of the edge sleeve  311  are sewed with each other for retaining the two top supporting arms  11  within the edge  310 . However, this configuration will result in that the surface of the edge  310  is not flat, and the manufacturing procedure is relatively complicated, and also the container body  30  is fixed to the two top supporting arms  11  can not be detached from the two top supporting arms  11  for cleaning. 
     In other words, the top supporting arms  11  can be coupled with the edge  310  of the surrounding wall  31  by any suitable manners, but it is preferred that the two top supporting arms  11  are respectively engaged with the edge  310  by means of the fixing ribs  312  and the edge sleeve  311 . 
     In this embodiment, each of the two supporting arms  11  is formed with a U-shape, and the two mounting ends  104  of the rod bodies  101  of the two top supporting arms  11  are spaced with each other. Accordingly, the edge  310  of the surrounding wall  31  define two central foldable portions  313  at two opposite sides thereof that are not received in the fixing cavities  102  of the rod bodies  101  of the two top supporting arms  11 , so that when the two top supporting arms  11  are folded and overlapped with each other, the two central foldable portions  313  of the edge  310  of the surrounding wall  31  of the container body  30  is folded to allow the entire container body  30  to be folded. 
     As shown in  FIG.  3 J  and  FIG.  3 K  of the drawings, the two top supporting arms  11  are pivotally mounted to the two folding assemblies  110 , each folding assembly  110  may comprise the base  111  and the linkage unit  112  for mounting ends of the the supporting legs  13  and ends of the top supporting arms  11 . Each linkage unit  112  comprises two linkage members  1121  respectively mounted on the top end of the supporting leg  13  and the mounting end  104  of the top supporting arms  11 . The linkage members  1121  are connected by the link shafts  1122 , so that the angle between each top supporting arm  11  and each supporting leg  13  can be controlled. More specifically, the base  111  has a mounting groove  1111  that two mounting ends  104  of the two rod bodies  101  of the two top supporting arms  11  are pivotally mounted in the mounting groove  1111 , so that the two top supporting arms  11  are pivotally mounted with the two folding assemblies  110  at positions corresponding to the central foldable portions  313  of the edge  310  of the surrounding wall  31  of the container body  30 , so that when the two top supporting arms  11  are folded and overlapped with each other, the two central foldable portion  313  of the edge  310  of the surrounding wall  31  of the container body  30  is folded to allow the entire container body  30  to be folded. Each of the two central foldable portions  313  also may be retained in the mounting groove  1111  of the base  111  so as to be hidden in the base  111 . 
     It is worth mentioning that the bottom wall  32  has a drain port  322  for draining the water or cleaning liquid in the container body  30 . Preferably, the drain port  322  is set at the lowest location or area of the bottom wall  32  for effectively draining the liquid in the container body  30 . The drain port  322  is able to connect a drain pipe  40  to allow liquid to flow out of the container body  30  along the drain pipe  40 . A drain plug can be detachably plugged at the drain port  322  to prevent the liquid being drained out the container body  30  through the drain port  322 . 
     Particularly, as shown in  FIGS.  2  and  7 C , when the foldable supporting frame  10  is in the folded mode, the drain pipe  40  is located in the retention channel. The retention channel is formed with a predetermined width because of the asymmetric folding of the fixed folding arm  1202  and the free rotatable folding arm  1201 . The drain pipe  40  is located in the retention channel and will not be pressed by the fixed folding arm  1202  and the free rotatable folding arm  1201 . In other words, the drain pipe  40  is held in the retention channel at the folded mode, wherein the drain pipe  40  is enclosed between two sides of the fixed folding arm  1202  and the free rotatable folding arm  1201 . Therefore, the drain pipe  40  will not be damaged by any external impact, and the drain pipe  40  is kept in a certain position to avoid any unwanted movement, vibration or swinging. 
     The bottom wall  32  further comprises a handle  321  connected to the operation switch  20 . The operation switch  20  can be operated by operating the handle  321  to fold the folding arm  12 . 
     As shown in  FIG.  4   , the operation switch  20  comprises a main body  21 , a slider  22  movably coupled at the main body  21 , and a resilient member  23  connecting the main body  21  to the slider  22  so as to fasten the slider  22  in the main body  21 . The main constructed to have a shape for being held on the end of one of the folding arms  12 . 
     Particularly, the main body  21  is rotatably coupled at the free folding arm  1201  and fixedly coupled at the fixed rotatable folding arm  1202 . It is worth mentioning that the slider  22  is partially protruded out of the main body  21  due to the elastic force of the resilient member  23 . When the resilient member  23  is configured to push the slider  22  protruding out of the main body  21 , the slider  23  can support the folding arm  12  in place. Once the slider  22  is configured to move inside the main body  21 , the folding arm  12  will lose support, such that the folding arm  12  will fall down and rotate around the rotating rod  121 . When the folding arm  12  is no longer supported by the slider  22  of the operation switch  20 , the folding arm  12  is folded. As a result, the two folding arms  12  are folded to overlap each other. 
     When the free rotatable folding arm  1201  is rotated, is supported by the slider  22 , and is parallel to the fixed folding arm  1202 , the folding arm  12  is unfolded flatly, while the folding supporting frame  10  is in the unfolded mode. When the slider  22  is configured to move back in the main body  21 , the free rotatable folding arm  1201  is configured to drop and overlappedly fold with the fixed folding arm  1202 . 
     According to the preferred embodiment, the main body  21  is formed with two fixed arm cavities  211 , two free arm cavities  212  and a slider cavity  213 . The end of the fixed folding arm  1202  is fixedly coupled in the fixed arm cavity  211 , and the rotating rod  121  is configured to pass through the fixed arm cavity  211 . The end of the free rotatable folding arm  1201  is movably arranged in the free arm cavity  212  and rotatably connected around the rotating rod  121 . Therefore, the rotating rod  121  is configured to pass through the fixed arm cavity  211  and the free arm cavity  212 . In other words, both ends of the free rotatable folding arm  1201  and both ends of the fixed folding arm  1202  surround the rotating rod  121 . The fixed folding arm  1202  and the fixed arm cavity  211  of the main body  21  remain stationary, wherein the free rotatable folding arm  1201  is configured to rotate in the free arm cavity  212  of the main body  21 . The slider  22  is movably disposed in the slider cavity  213  to be moved in or pushed by the resilient member  23  to move out of the slider cavity  213 . 
     The switch rod  122  is located outside of the main body  21  and is configured to apply a pushing force to the slider  22  to move the slider  22  backward in the slider cavity  213 . When the switch rod  122  is lifted to force the slider  22  to move in, and when the free rotatable folding arm  1201  is rotated around the rotating rod  121  to expand, the slider  22  is pushed to move back into the slider cavity  213 . When the switch rod  122  passes over the slider  22  that no force is applied to the slider  22 , the slider  22  is pushed out of the slider cavity  213  by the resilient member  213  to protrude out of the slider cavity  213  again. The switch rod  122  is then supported by the slider  22  when protrude out of the slider cavity  213 . Under this circumstances, the switch rod  122  cannot push the slider  22  back, and the slider  22  bears the weight of the switch rod  122 . When the slider  22  is kept protruding out of the slider cavity  213  and the switch rod  122  is still supported by the slider  22  of the operation switch  20 , the free rotatable folding arm  1201  and the fixed folding arm  1202  are relatively unfolded, while the folding arm  12  is laid flat and stable. 
     The slider  22  has a supporting end  221  defining a unidirectional inclined sloping surface. The switch rod  122  is configured to push the supporting end  221  along the sloping surface thereof. The supporting end  221  of the slider  22  is configured to support the switch rod  122  on the planar surface thereof to bear the weight of the switch rod  122  so as to prevent the switch rod  122  being pushed back. 
     The slider  22  has a pulling end  222  firmly connected to a pulling strap  24 . By pulling out the pulling strap  24 , the slider  22  is configured to resist the elastic force of the resilient member  23  and to move backward in the slider cavity  213 . 
     The slider  22  further comprises a stopper  223  protruded from the main body  21  to engage with the slider  22  inside the slider cavity  213  for preventing the slider  22  from moving out of the slider cavity  213  via the pushing force of the resilient member  23 . In other words, the slider  22  is pushed by the resilient member  23  and is held by the stopper  223  in order to be held in the slider cavity  213 . Also, the slider  22  is restricted to move along a specific path in the slider cavity  213 . According to the preferred embodiment, the slider  22  further comprises at least one slide rail  2134  formed inside the slider cavity  213  to limit the moving direction and distance of the slider  22 . The slider  22  further comprises at least one sliding leg  224 , wherein the sliding leg  224  is correspondingly engaged with the sliding rail  2134  of the sliding block cavity  213 . 
     The slider cavity  213  has a supporting opening  2131  corresponding to the free rotatable folding arm  1201  and a pulling opening  2132  corresponding to the fixed folding arm  1202 . The slider  22  is pushed by the resilient member  23  to protrude out from the supporting opening  2131 , wherein when the slider  22  is pressed by the switch rod  122 , the slider  22  is pulled back toward the pulling opening  2132 . The slider cavity  213  further has a limitation window  2133 . The limitation window  2133  is preferably located at the top of the main body  21 . The limitation window  2133  is configured to accommodate the stopper  223  of the slider  22  inside the limitation window  2133 . The limitation window  2133  is configured to block the stopper  223  and move within the area of the limitation window  2133 . In other alternative modes, the limitation window  2133  can be shaped as a groove to limit the movement of the stopper  223 . 
     The pulling strap  24  is extended out of the main body  21  through the pulling opening  2132  from the pulling end  222  of the sliding block  22 . When the pulling strap  24  is actuated to pull the slider  22  back to the slider cavity  213 , the supporting end  221  is moved backward, such that the support of the switch rod  122  is dismissed due to the backward movement of the supporting end  221 . The stopper  223  is restricted to continuously move backward by the limitation window  2133 , so as to avoid further movement of the slider  22 . 
     The pulling strap  24  has one end connecting to the handle  321  at the bottom wall  21  of the container body  30  and an opposed end connecting to the slider  22 . Therefore, when the handle  321  is pulled to lift the container body  30 , the pulling strap  24  is configured to transmit the pulling force to pull the slider  22  to move the slider  22  into the slider cavity  213 . Only one action of pulling the handle  321  of the container body  30  is required for operating the operation switch to fold the foldable supporting frame  10 . 
     In addition, the relationship and movement of the foldable container during the unfolding process according to the preferred embodiment are shown in  FIGS.  6 A to  6 C . 
     When the foldable container is actuated for being used, as an example, the top supporting arms  11  are opened from the folded mode. The top supporting arms  11  are configured to drive the supporting legs  13  to move and expand around the folding assembly  110 . The supporting legs  13  are configured to drive the folding arms  12  to open about the pivot shafts  130 . In other words, the folding arms  12  are driven to rotate about the pivot shafts  130  by the movements of the supporting legs  13 . When the folding arms  12  are unfolded to lay flat on each other, the folding arms  12  are rotated about the rotating rod  121 . The folding arm  12  will be supported by the operation switch  20  to restrict its further movement. 
     Specifically, when the free rotatable folding arm  1201  is rotated to the fixed folding arm  1202 , the free rotatable folding arm  1201  is rotated to be supported by the slider  22  of the operation switch  20  and is parallel to the fixed folding arm  1202 , such that the folding arms  12  are expand to lay flat on each other. The foldable support frame  10  is in the unfolded mode. When the free rotatable folding arm  1201  is driven to rotate, the switch rod  122  is lifted to apply the force to the supporting end  221  of the slider  22 . Then the slider  22  is pushed to move back into the slider cavity  213 . After the switch rod  122  is continuously raised to pass over the slider  22 , the slider  22  is not affect by the force, such that the slider  22  is pushed out of the slider cavity  213  by the resilient member  23  to protrude out of the slider cavity  213 . The switch rod  122  is supported on the slider  22  when the slider  22  is protruded out of the slider cavity  213 . Under this circumstance, the switch rod  122  cannot push the slider  22  back by exerts its weight on the slider  22 . Therefore, the folding arm  12  is unfolded and is stably supported by the switch  20 . The foldable support frame  10  is moved at its unfolded mode. The container body  30  is opened up as the top supporting arms  11  are expanded. 
     Accordingly, as the top supporting arm  11  of the foldable support frame  10  is unfolded, the folding arm  12  is stably supported by the operation switch  20 . Furthermore, under the movement of the top supporting arm  11 , the container body  30  is actuated to be opened. 
     In addition, the relationship and movement of the foldable container during the folding process according to the preferred embodiment are shown in  FIGS.  7 A to  7 C . 
     In order to fold the foldable container, the handle  321  is pulled to lift the container body  30 , such that the pulling strap  24  will transmit a pulling force to pull the slider  22  to move back in the slider cavity  213 . When the folding arm  12  is unfolded, the supporting end  221  will support the switch rod  122  on its planar surface to bear the weight of the switch rod  122  without being pushed back. When the slider  22  is moved backward in the slider cavity  213 , the slider  22  will resist the elastic force of the resilient member  23 . The switch rod  122  of the folding arm  12  will be dropped after losing the supportability so as to cause the free rotatable folding arm  1201  to rotate about the rotating rod  121 . In other words, the free rotatable folding arm  1201  is dropped and folded with the fixed folding arm  1202 . 
     When two arm portions of the folding arm  12  are folded with each other, the top supporting arms  11  and the supporting legs  13  are also folded accordingly. The rotation of the folding arm  12  will drive the supporting legs  13  to move about the pivot shafts  130 . 
     In other words, the supporting legs  13  are configured to rotate with the folding movements of the folding arms  12 , such that the top supporting arm  11  is driven to rotate around the folding assembly  110  to be folded. 
     Accordingly, when the pulling strap  24  is pulled to operate the operation switch  20 , the folding arm  12  will lose the support of the operation switch  20 . Then, when folding arm  12  is folded due to gravity, the supporting legs  13 , the top supporting arms  11  and the container body  30  are also folded along with the folding movements of the folding arms  12 . Therefore, the foldable container is folded up by one single pulling action. 
     As shown in  FIGS.  8  to  10 B , a foldable container according to a second embodiment illustrates an alternative mode of the first embodiment, wherein the difference between the first and second embodiments is that the container body  30 ′ is detachably coupled on the foldable supporting frame  10 ′. It is worth mentioning that the container body  30 ′ can be any conventional container suitable for being carried by the foldable supporting frame  10 ′. 
     The foldable supporting frame  10 ′ comprises at least two folding arms  12 ′ and at least four supporting legs  13 ′. Preferably, the number of the folding arms  12 ′ and the number of the supporting legs  13 ′ are designed accordingly. Each of the folding arms  12 ′ is correspondingly supported by the two supporting legs  13 ′. 
     In addition, according to the embodiment, the supporting legs  13 ′ are pivotally connected to each other about the pivot shaft  130 ′ and are driven by the folding arms  12  to rotate about the pivot shaft  130 ′. As shown in  FIGS.  9 A and  9 B , as the folding arms  12 ′ rotate about the rotating rod  121 ′ to be folded or unfolded, the angle and distance between the folding arms  12 ′ will change. The supporting legs  13 ′ are also driven to rotate about the pivot shaft  130 ′. 
     According to the second embodiment, two of the operation switches  20  are installed on one of the folding arms  12 ′. The operation switch  20  has the same structure and function as the above-mentioned first embodiment, and thus not be repeated here. 
     However, the switch rod  122 ′ is designed and shaped differently. The switch rod  122 ′ is integrally formed on the folding arm  12 ′ for providing supporting purpose. 
     In addition,  FIGS.  9 A to  9 B  illustrate the relationship and movement of unfolding the foldable container according to the preferred embodiment. 
     The foldable supporting frame  10 ′ is opened from the folded mode. The supporting legs  13 ′ are driven by the folding arms  12 ′ and are expanded about the pivot shafts  130 ′. The supporting legs  13 ′ can drive the folding arms  12 ′ to be opened. When the folding arms  12 ′ are unfolded to lay flat with each other, the folding arms  12 ′ are rotated about the rotating rod  121 ′. The folding arm  12 ′ will be supported by the operation switch  20  to restrict further downward movement, and further upward movement is restricted by the supporting leg  13 ′ and the pivot shaft  130 ′. 
     Specifically, when one of the folding arms  12 ′ is rotated toward another folding arm  12 , the switch rod  122 ′ is lifted to the supporting end  211  of the slider  22 . Each of the sliders  22  is configured to support the side of the switch rod  122 ′, such that the switch rod  122 ′ is symmetrically supported by the two operation switches  20 . Then, each of the sliders  22  is pushed by the switch rod  122 ′ to move into the slider cavity  213 , such that the switch rod  122 ′ will continue to lift and pass the slider  22 . Each of the sliders  22  is pushed out of the slider cavity  213  by the resilient member  23  so as to protrude out of the slider cavity  213  again. The switch rod  122 ′ is supported by the slider  22  and placed on the two operation switches  20  when the slider  22  is protruded out of the slider cavity  213 . Under the circumstance, the switch rod  112 ′ cannot push the slider  22  backward, and the weight of the switch rod  122 ′ is supported on the slider  22 . Then, the folding arm  12 ′ is unfolded and is stably supported by the operation switch  20 . The foldable supporting frame  10 ′ is then moved at the unfolded mode. The container body  30 ′ can be placed on the folding arms  12 ′. 
     Accordingly, as the folding arm  12 ′ or the supporting leg  13 ′ of the foldable supporting frame  10 ′ is unfolded, the folding arm  12 ′ is stably supported by the operation switch  20 , such that the switch lever  122 ′ can support the weight of the container body  30 ′. 
     In addition, relationship and movement of the foldable container during the folding process according to the preferred embodiment are shown in  FIGS.  10 A to  10 B . 
     When the folding arm  12 ′ is unfolded, the switch rod  122 ′ is supported on the planar surface of the supporting end  221  to support the weight of the switch rod  122 ′ without being pushed back. In order to fold the foldable container, it is necessary to pull the two pulling straps  24 ′, such that each slider  22  is moved backward in the slider cavity  213 . Each of the sliders  22  is pulled back in the slider cavity  213  against the elastic force of the resilient member  23 . The switch rod  122 ′ of the folding arm  12 ′ will lose the support, and then will fall and rotate about the rotating rod  121 ′. In other words, one of the folding arms  12 ′ is dropped for being folded with another folding arm  12 ′. The rotation of the folding arm  12 ′ will drive the supporting leg  13 ′ to move about the pivot shaft  130 ′. In other words, as the folding arm  12 ′ is folded, the supporting leg  13 ′ is rotated correspondingly. 
     Normally, when the pulling strap  24  is pulled to actuate the operation switch  20 , the folding arm  12 ′ will lose the support provided by the operation switch  20 . Then the folding arm  12 ′ is folded by its own gravity, wherein the supporting leg  13 ′ is folded as the folding arm  12 ′ is folded. Therefore, the foldable container is folded by the single pulling action. 
     In an alternative mode of the present invention, two pulling straps  24  can be connected end-to-end. Then, by pulling only one of the pulling straps  24 , the two operation switches  20  can be operated. In addition, the two ends of the pulling strap  24  are securely fastened to the two sliders  22  respectively. By pulling the pulling strap  24 , the two operation switches  20  are operated at the same time. 
     Moreover, as shown in  FIGS.  11  to  13   , a foldable container according to a third embodiment illustrates another alternative mode of the first embodiment, wherein the difference between the first and third embodiment is that the third embodiment further comprises a mattress  50 A disposed in the container body  30 , such that the container body  30  serves as a bed or a resting basket. 
     In other words, at least two folding arms  12  and at least four supporting legs  13  are correspondingly configured, wherein each of the folding arms  12  is correspondingly supported by two supporting legs  13 . Similarly, the supporting legs  13  are pivotally connected to each other about the pivot shaft  130 , wherein the supporting leg  13  is driven by the folding arm  12  to rotate about the pivot shaft  130 . As the folding arms  12  rotate about the rotating rod  121  to fold or unfold, the angle and distance between the folding arms  12  change. The supporting leg  13  is also driven to rotate about the pivot shaft  130 . The operation switch  20  is coupled at one of the folding arms  12 . The operation switch  20  has the same structure and function as the above mentioned first embodiment, and thus not being repeated here. 
     It is worth mentioning that the extension legs  14 A of the foldable supporting frame  10  are implemented differently in the third embodiment. The extension leg  14 A further comprises a rocking frame  141 A, two corner frames  142 A, and two foot stands  143 A, wherein the rocking frame  141 A is an elongated bar shape and is formed in a curved manner, wherein two ends of the rocking frame  141 A is coupled to the two corner frames  142 A respectively, wherein the foot stands  143 A are pivotally coupled at the corner frames  142 A respectively. The rocking frame  141 A is arranged extended along a lower part of the supporting leg  13  in a convex manner for supporting on the ground. Each of the foot stands  143 A comprises a supporting stand  1431 A and a swinging stand  1432 A integrally extended therefrom. For retaining the extension leg  14 A at a stationary position, the supporting stands  1431 A are rotatably extended toward a direction of the supporting leg  13  away from the rocking frame  141 A and are rotatably folded away from each other to stand on the ground. For retaining the extension leg  14 A at a rocking position, the supporting stands  1431 A are rotatably folded to overlap with the rocking frame  141 A, wherein the swinging stands  1432 A are outwardly extended from the two corner frames  142 A for limiting a rocking motion of the rocking frame  141 A. 
     Furthermore, the supporting stand  1431 A and the swinging stand  1432 A are integrally formed in a one-piece member and are rotatably coupled at the corner frames  142 A respectively. As shown in  FIG.  12   , when the swinging stand  1432 A is rotated to extend to the direction of the supporting leg  13 , the rocking frame  141 A is supported on the ground. Via the curvature of the rocking frame  141 A, the extension legs  14  can be rocked at a sideward rocking motion. Therefore, when the mattress  50 A is placed in the container body  30 , the container body  30  serves as a baby crib or baby cradle for a baby resting therein. 
     As shown in  FIG.  13   , when the supporting stands  1431 A are rotatably extended to the direction of the supporting leg  13 , the supporting stands  1431 A are supported on the ground, such that the rocking frame  141 A is raised above the ground. Then, the extension leg  14 A is stably supported on the ground with four ground points. Therefore, when the mattress  50 A is placed on the container body  30 A, the container body  30 A serves as a infant bed for a baby, and the foldable supporting frame  10  serves as a rocking bed for the baby. 
     It is worth mentioning that the operation of the extension legs  14 A will not affect the unfolding and folding operations of the foldable supporting frame  10 . The mattress  50 A further comprises with a mattress handle  51 A, wherein the mattress handle  51 A is connected to the operation switch  20  to be pulled up for actuating the folding operation of the operation switch  20 . 
     According to the preferred embodiment, the present invention further provides a folding method for the foldable container, which comprises the steps of: 
     folding the container body  30  via a pulling force; and 
     when folding up the container body  30 , folding the foldable supporting frame  10  from the unfolded mode to the folded mode, wherein at the unfolded mode, the container body  30  is supported by the foldable supporting frame  10 , and at the folded mode, the foldable supporting frame and the container body  30  are folded together. 
     Specifically, the container body  30  is connected with the operation switch  20 , wherein the operation switch  20  is actuated to fold the foldable supporting frame  10 . In other words, the operation of the container body  30  is configured to drive the operation of the operation switch  20 , thereby realizing the folding operation of the foldable supporting frame from the container body  30 . Since the container body  30  is folded by the pulling action to fold up the foldable supporting frame  10  at the same time, the entire folding operation of the foldable container is automatically actuated and completed by one pulling action. 
     One skilled in the art will understand that the embodiment of the present invention as shown in the drawings and described above is exemplary only and not intended to be limiting. It will thus be seen that the objects of the present invention have been fully and effectively accomplished. The embodiments have been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure from such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.