Patent Publication Number: US-2023146681-A1

Title: Bath Rack

Description:
CROSS REFERENCE OF RELATED APPLICATION 
     This is a Continuation-In-Part application that claims the benefit of priority under 35U.S.C.§ 120 to a non-provisional application, application Ser. No. 17/730,033, filed on Apr. 26, 2022, which is a non-provisional application that claims the benefit of priority under 35U.S.C.§ 119 to Chinese application number CN 202111209234.3, filed Oct. 18, 2021, the entire contents of each of which are expressly incorporated herein by reference. 
    
    
     BACKGROUND OF THE PRESENT INVENTION 
     Field of Invention 
     The present invention relates to a bathing article, and more particularly to a bath rack. 
     Description of Related Arts 
     The Applicant herein has disclosed a foldable container in a China invention patent application with a publication number CN110558882A, the foldable container includes a foldable supporting frame, an operation switch and a container body, the operation switch is arranged on the foldable supporting frame to allow the foldable supporting frame to move between an unfolded mode and a folded state by a pulling operation. The container body, which is mounted on the foldable supporting frame, defines an opening by an edge thereof. In the unfolded mode, the opening is open, and the opening is closed in the folded mode. The container body is able to be automatically folded up when the foldable supporting frame is moved from the unfolded mode to the folded mode, and the container body is automatically unfolded when the foldable supporting frame is moved from the folded mode to the unfolded mode, so that when in the folded mode, a space occupied by the foldable container is significantly reduced to save space for storing the foldable container. When in the unfolded mode, the foldable supporting frame is able to support the container body at a suitable height for facilitating a user to use the container body to clean a pet. It should be understood that when the foldable supporting frames is moved from the folded mode to the unfolded mode, the container body is able to be automatically unfolded along with the unfolding of the foldable supporting frame and is automatically supported at the suitable height. When the foldable container is unfolded, the container body may be supported at a relatively high position, and it is not possible for the pet to get into the container body at the relatively high position by itself, so that the user has to carry the pet to the container at the relatively high position. When the pet is relatively heavy, it is difficult for the user to pick up the pet and put the pet into the container body, especially for the pets with large or medium sized bodies such as Alaskans, Sheepdogs, Samoyeds, etc., for their weight in adulthood can reach more than 20 Kg. 
     SUMMARY OF THE PRESENT INVENTION 
     The invention is advantageous in that it provides a bath rack allowing a pet to enter and exit a bathtub at a high position by itself, so as to facilitate a user to use the bath rack to clean the pet in the bathtub. 
     Another advantage of the present invention is to provide a bath rack which provides a rack body and a foldable ladder, wherein after the foldable ladder is unfolded, the pet, by itself, is allowed to enter and exit the bathtub supported at a desired height by the rack body through the foldable ladder. 
     Another advantage of the present invention is to provide a bath rack, wherein the bathtub comprises a swinging end portion that its height can be reduced, so as to allow the pet to enter and exit the bathtub through the lowered swinging end portion. 
     Another advantage of the present invention is to provide a bath rack, wherein the foldable ladder can be independently folded and hidden under the bathtub, so as to avoid an adverse affect of the foldable ladder on the pet bathing process when the user uses the bath rack to clean the pet in the bathtub. 
     Another advantage of the present invention is to provide a bath rack, wherein the foldable ladder can be detachable, so as to avoid the adverse affect of the foldable ladder on the pet bathing process when the user uses the bath rack to clean the pet in the bathtub. 
     Another advantage of the present invention is to provide a bath rack, wherein a height of at least an end portion of the bathtub is able to be reduced, so as to allow the pet to enter and exit the bathtub through the foldable ladder, and when the pet enters the bathtub, the height position of the end portion can be reset to its original position, so as to retain sufficient water or cleaning liquid in the bathtub. As an example, the bathtub comprises the swinging end portion that lower or reset its height position through a downward or upward swinging moving manner. 
     Another advantage of the present invention is to provide a bath rack, wherein the rack body can be folded without requiring to detach the foldable ladder from the rack body, so that both of the rack body and the foldable ladder can be moved into the folded state, so as to form a compact folded storing structure. 
     Another advantage of the present invention is to provide a bath rack, wherein the foldable ladder is mounted to the rack body by a mounting rod which is rotatably mounted on two logitudinal extending legs, so as to allow the foldable ladder which is in the folded state to be hanging on the rack body under the bathtub. 
     Another advantage of the present invention is to provide a bath rack, wherein when the foldable ladder is in the unfolded state, the foldable ladder form a plurality of rectangular frames that is supported on the ground, so as to ensure a stable support to the pet which steps on the foldable ladder to enter the bathtub. 
     Another advantage of the present invention is to provide a bath rack, wherein the stability of the foldable ladder in the unfolded state can be further enhanced by a braking arm which is braced on the bottom horizontal bar and the bottom longitudinal bar. 
     Another advantage of the present invention is to provide a bath rack, wherein the foldable ladder in the folded state, a locking unit can be in a locked state so as to overlappedly align the horizontal bars of the foldable ladder into a compact structure. 
     Another advantage of the present invention is to provide a bath rack, wherein the bathtub is mounted to the opening frame of the rack body to enable that the opening of the bathtub is defined and mainted by the opening frame and the surrounding wall of the bathtub is flatly extended. 
     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 particularly pointing out in the appended claims. 
     According to the present invention, the foregoing and other objects and advantages are attained by a. bath rack for pet bathing, comprising: 
     a rack body; 
     a bathtub disposed on the rack body which is capable of supporting the bathtub to a predetermined height; and 
     a foldable ladder comprising an installation end portion installed on the rack body and a standing end portion opposite to the installation end portion adapted for standing on a ground. 
     According to one embodiment of the present invention, the rack body comprises two supporting members, an opening frame and a holding supporter, wherein the two supporting members are arranged symmetrically, and two opposite sides of the opening frame are respectively arranged on tops of the two supporting members, wherein two opposite sides of the holding supporter are respectively arranged on the two supporting members, wherein the bathtub comprises a bathtub bottom wall and a bathtub side wall upwardly extended from a periphery of the bathtub bottom wall, wherein the bathtub bottom wall is supported by the holding supported, wherein the bathtub side wall has a top edge connected to the opening frame, wherein the installation end portion of the foldable ladder is installed on one end portion of the holding supporter. 
     According to one embodiment of the present invention, the bathtub comprises a swinging end portion which is configured to swing up and down to lower and reset a height position thereof, wherein the foldable ladder is located at a position below the swing end portion of the bathtub. 
     According to one embodiment of the present invention, the bathtub comprises a swinging end portion which is configured to swing up and down to lower and reset a height position thereof, wherein the foldable ladder is located at a position below the swing end portion of the bathtub. 
     According to one embodiment of the present invention, the opening frame comprises two connecting elements, a shaping bracket and an adjusting bracket, wherein each of the connecting elements, which is respectively disposed on a top of one the supporting member, comprises a shaping bracket connecting end and an adjusting bracket connecting end, wherein the shaping bracket is curvedly extended, and two opposite ends of the shaping brackets are respectively mounted to the shaping bracket connecting ends of each of the connecting elements, wherein the adjusting brackets is curvedly extended and two opposite ends of the adjusting bracket are respectively pivotally mounted to the adjusting bracket connecting end of each of the connecting members, wherein the bathtub sidewall of the bathtub is flexible and a first part of the top edge of the bathtub sidewall is connected to the shaping bracket, and a second part thereof is connected to the adjusting bracket. 
     According to one embodiment of the present invention, the rack body further comprises at least one locking member comprising a first locking arm and a second locking arm movably connected to the first locking arm, wherein the first locking arm is pivotally mounted to one the supporting member, wherein the second locking arm is fixedly mounted to the adjusting bracket, wherein a connection position between the first locking arm and the second locking arm can be locked or released. 
     According to one embodiment of the present invention, the at least one locking member further comprises a locking element, wherein the first locking arm has a sliding groove, wherein an end portion of the second locking arm has a first locking groove, and the first locking the arm and the second locking arm are pivotally mounted, and the first locking groove of the second locking arm is capable of being aligned with the sliding groove of the first locking arm, wherein the locking element is slidably disposed in the sliding groove of the first locking arm, and the locking element is allowed to slide into or out of the first locking groove of the second locking arm. 
     According to one embodiment of the present invention, a side of the second locking arm has a second locking groove which is capable of being aligned with the sliding groove of the first locking element, wherein the locking element is allowed to slide into or out of the second locking groove of the second locking arm. 
     According to one embodiment of the present invention, the at least one locking member further comprises an operation element sheathed on an outside of the first locking arm, and the locking element is provided on the operation element. 
     According to one embodiment of the present invention, the rack body is foldable. 
     According to one embodiment of the present invention, each of the supporting members comprises a first supporting leg and a second supporting leg, wherein tops of the first supporting leg and the first supporting leg are respectively pivotally installed, wherein the holding supporter comprises a first holding bracket, a second holding bracket and a pivot mechanism, wherein an inner end portion of the first holding bracket is fixedly installed on the pivot mechanism, two opposite sides of the first holding bracket are respectively rotatably installed on the first supporting legs of the supporting members, wherein an inner end portion of the second holding bracket is pivotally mounted to the pivot mechanism, two opposite sides of the second holding bracket are respectively rotatably mounted to the second supporting legs of the supporting members. 
     According to one embodiment of the present invention, the pivot mechanism comprises a pivot element and a retaining element, wherein the pivot element has a pivot space and two limiting grooves communicated with the pivoting space through two opposite sides of the pivot element, wherein two opposite sides of the retaining element are respectively slidably installed in the limiting grooves of the pivot element, wherein the inner end portion of the first holding bracket is fixedly mounted to one end portion of the pivot element, and the inner end portion of the second holding bracket is pivotally mounted to the other end portion of the pivot element, wherein the inner end portion of the second holding bracket has a retaining groove that is capable of being aligned with the limiting grooves in the pivot space of the pivoting element, wherein the locking element is allowed to slide into or out of the retaining groove of the second holding bracket. 
     According to one embodiment of the present invention, the pivot mechanism comprises a pulling element and a restoring element, the pivoting element has a top through hole, and one end portion of the pulling element is mounted on the retaining element after passing through the top through hole of the pivot element, wherein the restoring element is retained between the pivot element and the locking element. 
     According to one embodiment of the present invention, the installation end portion of the foldable ladder is mounted to an outer end portion of the second holding bracket. 
     According to one embodiment of the present invention, two opposite ends of the shaping bracket are respectively pivotally mounted to the shaping bracket connecting end of each of the connecting elements. 
     According to one embodiment of the present invention, the bathtub bottom wall of the bathtub is flexible and is mounted to the holding supporter. 
     According to one embodiment of the present invention, the rack body further comprises a bracing member which comprises a first bracing element and a second bracing element pivotally connected to the first bracing element, wherein the first bracing element is pivotally mounted to one of the supporting members, wherein the second bracing element is fixedly mounted to an end portion of the shaping bracket. 
     According to another aspect of the present invention, the present invention provides a bath rack for pet bathing, comprising: 
     a rack body; 
     a bathtub disposed on the rack body which is capable of supporting the bathtub to a predetermined height, wherein the bathtub comprises a swinging end portion which is configured to swing up and down to lower and reset a height position thereof. 
     According to one embodiment of the present invention, the rack body comprises: 
     two supporting members which are arranged symmetrically; 
     a holding supporter, wherein two opposite sides of the opening frame are respectively arranged on the two supporting members; and 
     an opening frame comprising two connecting elements, a shaping bracket and an adjusting bracket, wherein each of the connecting elements, which is respectively disposed on a top of one the supporting member, comprises a shaping bracket connecting end and an adjusting bracket connecting end, wherein the shaping bracket is curvedly extended, and two opposite ends of the shaping brackets are respectively mounted to the shaping bracket connecting ends of each of the connecting elements, wherein the adjusting brackets is curvedly extended and two opposite ends of the adjusting bracket are respectively pivotally mounted to the adjusting bracket connecting end of each of the connecting members, wherein the bathtub sidewall of the bathtub is flexible and a first part of the top edge of the bathtub sidewall is connected to the shaping bracket, and a second part thereof is connected to the adjusting bracket. 
     According to one embodiment of the present invention, each of the supporting members comprises a first supporting leg and a second supporting leg, wherein tops of the first supporting leg and the first supporting leg are respectively pivotally installed, wherein the holding supporter comprises a first holding bracket, a second holding bracket and a pivot mechanism, wherein an inner end portion of the first holding bracket is fixedly installed on the pivot mechanism, two opposite sides of the first holding bracket are respectively rotatably installed on the first supporting legs of the supporting members, wherein an inner end portion of the second holding bracket is pivotally mounted to the pivot mechanism, two opposite sides of the second holding bracket are respectively rotatably mounted to the second supporting legs of the supporting members, wherein two opposite ends of the shaping bracket are respectively pivotally mounted to the shaping bracket connecting ends of each of the connecting elements. 
     According to one embodiment of the present invention, the bathtub bottom wall of the bathtub is flexible and is mounted on the holding supporter. 
     The present invention further provides a bath rack for pet bathing, comprising a rack body, a bathtub disposed on the rack body which is capable of supporting the bathtub to a predetermined height, and a foldable ladder pivotally mounted to the rack body, wherein the foldable ladder is moved between an unfolded state for allowing the pet to enter the bathtub through the foldable ladder and a folded state in which the foldable ladder is folded and pivotally moved to a position under the bathtub. 
     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 bath rack in a folded state according to a preferred embodiment of the present invention. 
         FIG.  2 A  and  FIG.  2 B  are perspective views of different angles of views of the bath rack in a unfolded state according to the above preferred embodiment of the present invention. 
         FIG.  3    is an exploded view of the bath rack according to the above preferred embodiment of the present invention. 
         FIG.  4 A  is a partial enlarged view of a locking member in  FIG.  3   . 
         FIG.  4 B  is a partial enlarged view of a holding supporter in  FIG.  3   . 
         FIG.  5    is a perspective view of a locking member of the bath rack according to the above preferred embodiment of the present invention. 
         FIG.  6 A  and  FIG.  6 B  are exploded views of different angles of views of the locking member of the bath rack according to the above preferred embodiment of the present invention. 
         FIG.  7    is a perspective view of a holding supporter of the bath rack according to the above preferred embodiment of the present invention. 
         FIG.  8    is an exploded view of the holding supporter of the bath rack according to the above preferred embodiment of the present invention. 
         FIGS.  9 A to  9 E  are respective perspective views illustrating an unfolding process of a rack body of the bath rack according to the above preferred embodiment of the present invention. 
         FIGS.  10 A to  10 E  are perspective views illustrating the bath rack being used for pet bathing according to the above preferred embodiment of the present invention. 
         FIG.  11    is a perspective views illustrating a bath rack being in an unfolded sate according to an alternative mode of the above preferred embodiment of the present invention. 
         FIG.  12    is another perspective views illustrating the bath rack being in an unfolded sate according to the above alternative mode of the above preferred embodiment of the present invention, wherein a bracing arm is in a locked state. 
         FIG.  13    is a perspective views illustrating a foldable ladder of the bath rack being in an folded sate according to the above alternative mode of the above preferred embodiment of the present invention. 
         FIG.  14    is a perspective views illustrating the foldable ladder of a bath rack being in the folded sate according to the above alternative mode of the above preferred embodiment of the present invention, wherein the foldable ladder is pivotally moved to a position under the bathtub. 
         FIG.  15    is a perspective views illustrating the bath rack being in the folded sate according to the above alternative mode of the above preferred embodiment of the present invention. 
         FIG.  16    is a perspective views illustrating the rack body and the foldable ladder of the bath rack being in the folded sate according to the above alternative mode of the above preferred embodiment of the present invention. 
         FIG.  17    is a perspective views illustrating the bath rack being in the unfolded sate for allowing the pet to enter the bathtub according to the above alternative mode of the above preferred embodiment of the present invention. 
         FIG.  18    is a perspective views illustrating the bath rack being in the unfolded sate for pet bathing according to the above alternative mode of the above preferred embodiment of the present invention. 
         FIG.  19    is a perspective view of a bathtub of a bath rack according to an alternative mode of the above preferred embodiment of the present invention, wherein two fixing ribs are not inserted into an edge of a bathtub side wall. 
         FIG.  20    is a perspective view of the bathtub of the bath rack according to the above alternative mode of the above preferred embodiment of the present invention, wherein two fixing ribs are inserted into the edge of the bathtub side wall. 
         FIG.  21    is a perspective view of the bathtub assembly of the bath rack according to the above alternative mode of the above preferred embodiment of the present invention. 
         FIG.  22    is a perspective view illustrating the process for mounting brackets to the bathtub of the bath rack according to the above alternative mode of the above preferred embodiment of the present invention. 
         FIG.  23    is a perspective view of the brackets of the bath rack according to the above alternative mode of the above preferred embodiment of the present invention. 
         FIG.  24    are sectional views illustrating the edge of the bathtub side wall being mounted to the brackets of the bath rack according to the above alternative mode of the above preferred embodiment of the present invention. 
         FIG.  25    is a perspective view of the assembled bathtub assembly of the bath rack according to the above alternative mode of the above preferred embodiment of the present invention. 
         FIG.  26    is a perspective view of the foldable ladder of the bath rack being in the folded state while the rack body and the bathtub are in the unfolded state according to the above alternative mode of the above preferred embodiment of the present invention. 
         FIG.  27    is a perspective view of the foldable ladder, the rack body and the bathtub are all in the folded state according to the above alternative mode of the above preferred embodiment of the present invention. 
     
    
    
     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. The use of “comprise”, “include” or “have” and variations thereof herein is intended to encompass the items listed below and their equivalents as well as additional items. Unless otherwise specified or limited, the terms “install,” “connect,” “support,” and “couple,” and variations thereof, are used broadly and encompass both direct and indirect installations, connections, supports, and couplings. Furthermore, “connect” and “couple” are not limited to physical or mechanical connections or couplings. 
     Those skilled in the art should understand that, in the disclosure of the present invention, terminologies of “longitudinal,” “lateral,” “upper,” “front,” “back,” “left,” “right,” “perpendicular,” “horizontal,” “top,” “bottom,” “inner,” “outer,” and etc. that indicate relations of directions or positions are based on the relations of directions or positions shown in the appended drawings, which are only to facilitate descriptions of the present invention and to simplify the descriptions, rather than to indicate or imply that the referred device or element is limited to the specific direction or to be operated or configured in the specific direction. Therefore, the above-mentioned terminologies shall not be interpreted as confine to the present invention. It should be understood that the term “a” should be understood as “at least one” or “one or more”. In other words, in one embodiment, the number of an element may be one, and in another embodiment, the number of the element may be plural. The term “one” should not be understood as a limitation on the number. 
     Referring to  FIG.  1    to  FIG.  10 E  of the drawings, a bath rack according to a preferred embodiment of the present invention is illustrated, wherein the bath rack comprises a rack body  10 , a bathtub  20  and a foldable ladder  30 . The bathtub  20  is arranged on the rack body  10 , and the bathtub  20  is supported at a preset height by the rack body  10 , the foldable ladder  30  is arranged on the rack body  10 . When the foldable ladder  30  is unfolded, a pet is allowed to enter and exit the bathtub  20  through the foldable ladder  30  by itself, and the user can wash the pet&#39;s body in the bathtub  20 . Preferably, when the foldable ladder  30  is folded, the foldable ladder  30  can be hidden under the bathtub  20  to prevent the foldable ladder  30  from affecting the cleaning process. 
     More specifically, the rack body  10  comprises two supporting members  11 , an opening frame  12  and a holding supporter  13 , wherein the two supporting members  11  are arranged symmetrically, and middle portions of two opposite sides of the opening frame  12  are respectively arranged on tops of the two supporting members  11 , and middle portions of two opposite sides of the holding supporter  13  are respectively arranged on the two supporting members  11 , so as to support the opening frame  12  at a suitable height and supports the holding supporter  13  at a suitable height by the two supporting members  11 . 
     The bathtub  20  includes a bathtub bottom wall  21  and a bathtub side wall  22  upwardly extended from a periphery of the bathtub bottom wall  21 . The bathtub bottom wall  21  is supported by the holding supporter  13 . A top edge of the bathtub side wall  22  is connected to the opening frame  12 , so as to form a bathing space  23  between the tub bottom wall  21  and the bathtub side wall  22  for storing water or a cleaning liquid, and the pet can be received in the bathing space  23  so as to allow the user to wash the pet&#39;s body in the bathtub  20 . 
     The foldable ladder  30  comprises an installation end portion  31  and a standing end portion  32  opposite to the installation end portion  31 , and the installation end portion  31  of the foldable ladder  30  is mounted on the holding supporter  13 . When the foldable ladder  30  is unfolded to allow the standing end portion  32  to stand and contact the ground, a position of a center of gravity of the foldable ladder  30  can be lowered, and the position of the center of gravity of the foldable ladder  30  is close to the position of the center of gravity of the rack body  10 , so that the stability of the bath rack is ensured, and thus when the pet enters and exits the bathtub  20  through the foldable ladder  30  by itself, the bath rack can be prevented from tipping over and the reliability of the bath rack can be ensured. 
     It can be understood that by setting the middle portions of the opposite sides of the opening frame  12  on the tops of the two supporting members  11  and the middle portions of the holding supporter  13  on the opposite sides of the two supporting members  11 , the two end portions of the opening frame  12  and two end portions of the holding supporter  13  are defined, and the two end portions of the bathtub  20  are also defined. That is, the end portions of the bathtub, the end portions of the opening frame  12  are correspondingly respectively aligned with the end portions of the holding supporter  13 . The installation end portion  31  of the foldable ladder  30  is installed on one end portion of the holding supporter  13 , so that after the foldable ladder  30  is unfolded, the pet is allowed to pass through the foldable ladder  30  to enter and exit the bathtub  20  by itself. By lowering the center of gravity of the foldable ladder  30  and allowing the center of gravity of the foldable ladder  30  to be close to the center of gravity of the rack body  10 , when the pet passes through the foldable ladder  30  to enter and exit the bathtub  20  by itself, the stability of the bath rack can be ensured. 
     Preferably, with continued reference to  FIG.  1    to  FIG.  10 E , a height position of at least one end portion of the bathtub  20  can be lowered, so that the pet can enter and exit the bathtub  20  through the foldable ladder  30  by itself. And after the pet enters the bathtub  20 , the height position of the end portion of the bathtub  20  can be reset to allow sufficient water or cleaning liquid to be stored in the bathing space  23  of the bathtub  20 . 
     Specifically, the bathtub side wall  22  of the bathtub  20  is flexible, and the bathtub  20  has a swinging end portion  24  which lowers or resets the height position of the swinging end portion  24  of the bathtub  20  by swinging up and down. Location. When the swinging end portion  24  of the bathtub  20  swings downward, the height position of the swinging end portion  24  of the bathtub  20  is lowered, so that the pet can enter and exit the bathtub  20  through the foldable ladder  30  by itself. When the swinging end portion  24  of the bathtub  20  swings upward, the height position of the swinging end portion  24  of the bathtub  20  is reset, so as to store sufficient water or cleaning liquid in the bathing space  23  of the bathtub  20 . 
     More specifically, the opening frame  12  comprises two connecting elements  121 , a shaping bracket  122  and an adjusting bracket  123 , wherein the two connecting elements  121  are respectively disposed on the tops of the two supporting members  11 . Each of the connecting elements  121  has a shaping bracket connecting end  1211  and an adjusting bracket connecting end  1212  opposite to the shaping bracket connecting end  1211 . The shaping bracket  122  is curvedly extended and two opposite ends thereof are respectively connected to the shaping bracket connecting ends  1211  of the two connecting elements  121 . The adjusting bracket  123  is curvedly extended, and two opposite ends thereof are respectively pivotally mounted on the adjusting bracket connecting end  1212  of the two connecting elements  121 , so as to allow the adjusting bracket  123  to swing with respect to the two connecting elements  121 . A first part of the top edge of the bathtub side wall  22  of the bathtub  20  is connected to the shaping bracket  122 , and a second part thereof is connected to the adjusting bracket  123 , and the end portion of the bathtub  20  corresponding to the adjusting bracket  123  is the swinging end portion  24  of the bathtub  2 , wherein the swinging end portion  24  of the bathtub  20  swings along with the swinging of the adjusting bracket  123  to lower or reset the height position of the swinging end portion  24  of the bathtub  20 . 
     When the adjusting bracket  123  drives the swinging end portion  24  of the bathtub  20  to swing downward, the side wall  22  of the bathtub is driven by the adjusting bracket  123  to deform, so as to lower the height position of the swinging end portion  24  of the bathtub  20 . In this way, the pet can easily enter and exit the bathtub  20  through the foldable ladder  30 . When the adjusting bracket  123  drives the swinging end portion  24  of the bathtub  20  to swing upward, the side wall  22  of the bathtub driven by the adjusting bracket  123  to deform, so as to reset the height position of the swinging end portion  24  of the bathtub  20 , so that sufficient water or cleaning liquid can be stored in the bathing space  23  of the bathtub  20 . 
     It is worth mentioning that, no matter when the adjusting bracket  123  drives the swinging end portion  24  of the bathtub  20  to swing downward to lower the height position of the swinging end portion  24  of the bathtub  20 , or when the adjusting bracket  123  drives the swinging end portion  24  of the bathtub  20  to swing upward and resets the height position of the swinging end portion  24  of the bathtub  20 , the bottom wall  21  of the bathtub  20  is kept flat to provide a sufficient standing space to the pet, so that the pet&#39;s comfort in the tub  20  is not affected during the adjustment of the swinging end portion  24  of the bathtub  20 . 
     Continuing to refer to  FIGS.  1  to  10 E , the rack body  10  comprises at least one locking member  14 , and the locking member  14  comprises a first locking arm  141  and a second locking arm  142 . A first end portion  141   a  of the first locking arm  141  and a first end portion  142   a  of the second locking arm  142  are movably connected, and a second end portion  141   b  of the first locking arm  141  is pivotally mounted on the corresponding supporting member  11 , a second end portion  142   b  of the second locking arm  142  is fixedly mounted on an end portion of the adjusting bracket  123  adjacent to the corresponding connecting element  121 , wherein the connection between the first locking arm  141  and the second locking arm  142  can be locked or released. That is, the locking member  14  has a locked state and an active state, and the locking member  14  can be switched between the locked state and the active state. When the locking member  14  is in the locked state, the connection position between the first locking arm  141  and the second locking arm  142  is locked for supporting the adjusting bracket  123  to a horizontal state, when the locking member  14  is in the active state, the connection position between the first locking arm  141  and the second locking arm  142  is released, so as to allow the adjusting bracket  123  to drive the swinging end portion  24  of the bathtub  20  to swing downward to Lower the height position of the swing end portion  24  of the bathtub  20 , or allow the adjusting bracket  123  to drive the swing end portion  24  of the bathtub  20  to swing upward to reset the height position of the swing end portion  24  of the bathtub  20 . 
     Further, the first locking arm  141  has a sliding groove  1411 , the first end portion  142   a  of the second locking arm  142  has a first locking slot  1421 , the first end portion  141   a  of the first locking arm  141  and first end portion  142   a  of the second locking arm  142  is rotatably installed, and the first locking groove  1421  of the second locking arm  142  can be aligned with the sliding groove  1411  of the first locking arm  141 . The locking member  14  further comprises a locking stopper element  143  which is configured to be able to slide along the sliding groove  1411  of the first locking arm  141 . When the locking stopper element  143  slides along the sliding groove  1411  of the first locking arm  141  to the first locking groove  1421  of the second locking arm  142  to lock the second locking arm  142 , the connection position of the first locking arm  141  and the second locking arm  142  is locked so that the locking member  14  is in the locked state. At this time, the first locking arm  141  and the second locking arm  142  are used to support the adjusting bracket  123  at the horizontal state so that the swinging end portion  24  of the bathtub  20  is maintained at a higher position. When the locking stopper element  143  slides along the sliding groove  1411  of the first locking arm  141  to get out out of the first locking groove  1421  of the second locking arm  142 , the connecting position of the first locking arm  141  and the second locking arm  142  is released, so that the locking member  14  is in the active state, at this time, the adjusting bracket  123  can be driven to move with respect to the corresponding connecting element  121 , so that the swinging end portion  24  of the bathtub  20  is allowed to swing up and down. 
     Furthermore, the locking member  14  comprises an operation element  144  which is movably sheathed on an outside of the first locking arm  141 , and the locking stopper element  143  is provided on the operation element  144  to allow the operation element  144  to drive the locking stopper element  143  to slide along the sliding groove  1411  of the first locking arm  141 . Specifically, the operation element  144  comprises an operation body  1441  and two extending arms  1442 , and the operation element  144  has a longitudinal through hole  1443 , an escape groove  1444  and a transverse through hole  1445 , wherein the longitudinal through hole  1443  is formed in the operation body  1441 , the two extending arms  1442  are integrally and spacedly extended from the operation body  1441 , so as to form the escape groove  1444  between the two extending arms  1442 , the escape groove  1444  and the longitudinal through hole  1443  communicate with each other, the transverse through hole  1445  penetrates through the two extending arms  1442 , and the transverse through hole  1445  communicates with the escape groove  1444 . The first locking arm  141  is movably disposed at the longitudinal through hole  1332  of the operation element  144  in a manner that the transverse through hole  1445  of the operation element  144  is aligned with the sliding groove  1411  of the first locking arm  141 , so as to enable the operation element  144  to be movably sheathed on the outside of the first locking arm  141 , wherein two opposite ends of the locking stopper element  143  are respectively disposed on the operation element at the transverse through hole  1445 , so as to expose a middle portion of the first locking member  143  in the escape groove  1444  of the operation member  144  while is retained at the sliding groove  1411  of the first locking arm  141 . The escape groove  1444  is used to avoid a blocking affect to the second locking arm  142 , so as to allow the second locking arm  142  to rotate with respect to the first locking arm  141 . 
     Specifically, when the operation element  144  is operated to drive the locking stopper element  143  to synchronously move down along the sliding groove  1411  of the first locking arm  141 , the locking stopper element  143  slides out of the first locking groove  1421  of the second locking arm  142  to release the connection position between the first locking arm  141  and the second locking arm  142 , so that the locking member  14  is moved into the active state. Accordingly, when the operation element  144  drives the locking stopper element  143  to synchronously move upward along the sliding groove  1411  of the second locking arm  142 , the locking stopper element  143  can slide into the first locking groove  1421  of the second locking arm  142  to lock the connection position between the first locking arm  141  and the second locking arm  142 , so that the locking member  14  is moved into the locked state. 
     Preferably, the operation element  144  comprises an operation arm  1446  integrally and outwardly extended from the operation body  1441 , so as to facilitate the user to exert a force on the operation element  144  to allow the operation element  144  to move downward. 
     Furthermore, the locking member  14  comprises a reset element  145  comprising a first end portion which is biasing against the locking stopper element  143  and a second end portion which is biasing against the first locking arm  141 . When the locking stopper element  143  slides with respect to the first locking arm  141  along the sliding groove  1411  of the first locking arm  141 , the reset element  145  is compressed to accumulate an elastic force. When the external force applied on the locking stopper element  143  is removed, the reset element  145  drives the locking stopper element  143  to move with respect to the first locking member  143  along the sliding groove  1411  of the first locking arm  141 , so as to restore its initial position. Preferably, the reset element  145  is a compression spring. 
     It is worth mentioning that the manner in which the second end portion of the reset element  145  biasing against the first locking arm  141  is not limited in the bath rack of the present invention, for example, the first locking arm  141  may be set with a latch  146 , the second end portion of the reset element  145  is biasing against the first locking arm  145  by pressing against the latch  146 . 
     Preferably, a middle portion of the second locking arm  142  is configured to allow a rotating movement, so as to improve the flexibility of the locking member  14 . 
     Specifically, the second locking arm  142  comprises a fixed part  1422  and a movable part  1423  pivotally mounted on the fixed part  142 , and the fixed part  1422  is fixedly mounted on the end portion of the adjusting bracket  123 , the movable part  1423  is pivotally mounted on the first locking arm  141 , wherein the first locking groove  1421  is formed at an end portion of the movable portion  142 . 
     Preferably, a side of the second locking arm  142  is formed with a second locking groove  1424  that can be aligned with the sliding groove  1411  of the first locking arm  141 . After the movable part  1423  rotates with respect to the first locking arm  141 , the locking stopper element  143  can slide to a position corresponding to the second locking groove  1424  of the second locking arm  142  to allow the swinging end portion  24  of the bathtub  20  to be held in a lowered position. 
     Preferably, the first end portion  141   a  of the first locking arm  141  has a blocking block  1412  protruded from a side surface of the first locking arm  141  for blocking the the movement of the movable part  1423  of the second locking arm  142 , so as to restrict the rotation direction of the second locking arm  142 . For example, the first locking arm  141  is a sheet metal part, which forms the blocking block  1412  by bending. 
     Preferably, the first locking arm  141  comprises a reinforcing rib  1413  extended along a length direction of the first locking arm  141  for enhancing the strength of the first locking arm  141 . For example, the first locking arm  141  is a sheet metal part, and the reinforcing rib  1413  is formed by punching. 
     In this specific example of the bath rack shown in  FIG.  1    to  FIG.  10 E , the number of the locking members  14  is two, and one locking member  14  is provided tween one supporting member  121  and an end portion of the adjusting bracket  123 , the other locking member  14  is provided between the other supporting member  11  and the other end portion of the adjusting bracket  123 , so that the two locking members  14  can stably support the adjusting bracket  123  to keep the adjusting bracket  123  be horizontal. 
     Optionally, in other examples of the bath rack of the present invention, the first end portion of the first locking arm  141  can be pivotally mounted on the adjusting bracket  123 , and the fixed part of the second locking arm  142  can be fixedly mounted on the corresponding supporting member  11 , so that when the locking member  14  is in the locked state, the first locking arm  141  and the second locking arm  142  can support the adjusting bracket  123  at a horizontal state, and when the locking member  14  is in the active state, the first locking arm  141  and the second locking arm  142  can rotate with respect to each other to allow the adjusting bracket  123  to drive the swinging end portion  24  of the bathtub  20  to swing up and down. 
     Continuing to refer to  FIGS.  1  to  10 E , in this preferred example of the bath rack of the present invention, the rack body  10  is foldable to reduce a size of the bath rack when it is not in use. 
     Specifically, each of the supporting member  11  comprises a first supporting leg  111  and a second supporting leg  112 , and top end portions of the first supporting legs  111  and the second supporting legs  112  are pivotally installed with each other to form the top of the corresponding supporting member  11 . The holding supporter  13  comprises a first holding bracket  131 , a second holding bracket  132  and a pivot mechanism  133 , wherein the first holding bracket  131  has a first inner end portion  1311  and a first outer end portion  1312  opposite to the first inner end portion  1311 , the first inner end portion  1311  of the first holding bracket  131  is fixedly mounted on the pivot mechanism  133 , two opposite lateral sides of the first holding bracket are respectively rotatably mounted on the first supporting legs  111  of the two supporting members  11 . The second holding bracket  132  has a second inner end portion  1321  and a second outer end portion  1322  opposite to the second inner end portion  1321 , the second inner end portion  1321  of the second holding bracket  132  is pivotally mounted on the pivot mechanism  133 , two opposite lateral sides of the second holding bracket  132  are respectively rotatably mounted on the second supporting legs  112  of the two supporting members  11 . 
     The first supporting legs  111  and the second supporting leg  112  of the two supporting members  11 , the first holding bracket  131  and the second holding bracket  132  of the holding supporter  13 , and the pivot mechanism  133  can be linked to operate together. 
     When the first supporting legs  111  and the second supporting legs  112  of the two supporting members  11  are moved in such a way that bottom ends of the first supporting legs  111  and the second supporting legs  112  are moved away from each other, on one hand, the first holding bracket  131  rotates with respect to the first supporting legs  111 , the second holding bracket  132  rotates with respect to the second supporting legs  112 ; and on the other hand, the first holding bracket  131  and the second holding bracket  132  are rotated with respect to each other, so that the first holding bracket  131  and the second holding bracket  132  tend to be horizontal. When the first holding bracket  131  and the second holding bracket  132  are horizontal, the rack body  10  is unfolded and is in an unfolded state. 
     When the first supporting legs  111  and the second supporting legs  112  of the two supporting members  11  are moved in such a way that the bottom ends of the first supporting legs  111  and the second supporting legs  112  are moved toward to each other, on one hand, the first holding bracket  131  rotates with respect to the first supporting leg  111 , the second holding bracket  132  rotates with respect to the second supporting legs  112 , and one the other hand, the first holding bracket  131  and the second holding bracket  132  are rotated with respect to each other, so that the first holding bracket  131  and the second holding bracket  132  tend to be overlapped with each other. When the first holding bracket  131  and the second holding bracket  132  are stacked, the rack body  10  is folded to be in a folded state. 
     Preferably, when the first holding bracket  131  and the second holding bracket  132  are horizontal, the pivot mechanism  133  can lock the first holding bracket  131  and the second holding bracket  132 , so as to ensure that the rack body  10  is reliably retained in the unfolded state. 
     Specifically, the pivot mechanism  133  comprises a pivot element  1331  and a locking element  1332 , wherein the pivot element  1331  has a pivot space  13311  and two limiting grooves  13312  which are respectively communicated with the pivot space  13311  at two opposite sides of the pivot element  1331 , wherein two opposite end portions of the locking element  1332  are respectively slidably installed in the two limiting grooves  13312  of the pivot element  1331 , so that a middle of the locking element  1332  is located in the pivot space  13311  of the pivot element  1331 . The first inner end portion  1311  of the first holding bracket  131  is fixedly mounted on one end portion of the pivot element  1331 , and the second inner end portion  1321  of the second holding bracket  132  is rotatably mounted on the other end portion of the pivot element  1331 , and the second holding bracket  132  forms a retaining groove  1323  at the second inner end portion  1321 , and the retaining groove  1323  can be in the pivot space  13311  of the element  1331  to be aligned with the limiting grooves  13312 , so as to allow the middle of the locking element  1332  to be held in the retaining groove  1323  of the second holding bracket  132 . When the locking element  1332  slides along the limiting grooves  13312  of the pivot element  1331  to the retaining groove  1323  of the second holding bracket  132 , the pivot mechanism  133  locks the first holding bracket  131  and the second holding bracket  132  which are made horizontal to ensure that the rack body  10  is retained reliably in the unfolded state. When the locking element  1332  slides along the limiting grooves  13312  of the pivot element  1331  and get out of the retaining groove  1323  of the second holding bracket  132 , the pivot mechanism  133  releases the first holding bracket  131  and the second holding bracket  132  which can be rotated with respect to each other, so that the rack body  10  can be folded. 
     Furthermore, the pivot element  1331  has a top through hole  13313  which is communicated with the pivot space  13311 , wherein the pivoting mechanism  133  further comprises a pulling element  1333  and a restoring element  1334 , one end portion of the pulling element  1333  is mounted on the locking element  1332  after extending into the pivot space  13311  through the top through hole  13313  of the pivot element  1331 , and the restoring element  1334  is held between the pivot element  1331  and the locking element  1332 . 
     When a force is applied to the locking element  1332  through the pulling element  1333 , the locking element  1332  can move upward along the limiting grooves  13312  of the pivot element  1331  to allow the locking element  1332  to slide out of the retaining groove  1323  of the second holding bracket  132 , so that the pivot mechanism  133  releases the first holding bracket  131  and the second holding bracket  132 , and at this time, the restoring element  1334  is pressed and deformed by the pivot element  1331  and the locking element  1332  to accumulate an elastic force. When the pulling element  1333  continues to exert the force on the locking element  1332 , based on the principle of gravity, the first holding bracket  131  and the second holding bracket  132  can automatically rotate with respect to each other to allow the rack body  10  to automatically switches from the unfolded state to the folded state. 
     When the external force applied to the pulling element  1333  is removed, the restoring element  1334  drives the pulling element  1333  to move downward along the limiting grooves  13312  of the pivot element  1331  during the process of restoring its initial state, so as to allow the locking member  1332  to slide to the locking groove  1323  of the second holding bracket  132 , so that the pivot mechanism  133  locks the first holding bracket  131  and the second holding bracket  132 . 
     Continuing to refer to  FIGS.  1  to  10 E , opposite end portions of the shaping bracket  122  can be respectively rotatably mounted on the shaping bracket connecting ends  1211  of the two connecting elements  121 , wherein the rack body  10  further comprises at least one bracing member  15 , the bracing member  15  comprises a first bracing element  151  and a second bracing element  152 , one end portion of the first bracing element  151  and one end portion of the second bracing element  152  are pivotally mounted, the other end portion of the first bracing element  151  is pivotally mounted on the corresponding first supporting leg  111  of the supporting member  11 , and the other end portion of the second bracing element  152  is fixedly mounted to the end portion of the shaping bracket  122 . 
     In a preferred example of the shower rack of the present invention, a length of the first bracing element  151  is greater than a length of the second bracing element  152 , so that the first bracing element  151  and the second bracing elements  152  can cooperate with each other to reliably support the shaping bracket  122  at the horizontal state. Specifically, when the first bracing element  151  is exerted with a force, the opposite end portions of the first bracing element  151  are allowed to rotate with respect to the corresponding first supporting leg  111  and the second bracing element  152  respectively; the shaping bracket  122  can be rotated toward the direction close to the corresponding first supporting leg  111 , so that the shaping bracket  122  can be stacked on the corresponding first supporting leg  111 . When the shaping bracket  122  is forced to rotate in a direction away from the corresponding first supporting leg  111 , the shaping bracket  122  can drive the first bracing element  151  to allow the opposite end portions of the first bracing element  151  to rotate with respect to the corresponding first supporting leg  111  and the second bracing element  152 , and when the shaping bracket  122  is rotated to the horizontal state, the first bracing element  151  and the second bracing element  152  can cooperate with each other to reliably support the shaping bracket  122 . 
     In this specific example of the bath rack shown in  FIG.  1    to  FIG.  10 E , the number of the bracing members  15  is two, and one of the bracing members  15  is provided between the first supporting leg  111  of one supporting member  11  and one end portion of the shaping bracket  122 , the other bracing member  15  is provided between the first supporting leg  111  of the other supporting member  11  and the other end portion of the shaping bracket  122 , and thus the two bracing members  15  can stably support the shaping brackets  122  and keep the shaping bracket  122  be horizontal. 
     Continuing to refer to  FIGS.  1  to  10 E , the second end portion  141   a  of the first locking arm  141  of the locking member  14  is rotatably mounted to the corresponding second supporting leg  112  of the supporting member  11 . In other words, opposite end portions of the locking member  14  are respectively connected to the second supporting leg  112  of the supporting member  11  and the end portion of the adjusting bracket  123  to allow the locking member  14  to support the adjusting bracket  123  at the horizontal state. 
     Continuing to refer to  FIG.  1    to  FIG.  10 E , the bathtub  20  is flexible, and the shape of the bathtub  20  can change itself as the shape of the rack body  10  changes. For example, the bathtub  20  automatically folds along with the folding of the rack body  10 , and the bathtub  20  is automatically unfolded along with the unfolding of the rack body  10 . 
     Specifically, the bathtub bottom wall  21  of the bathtub  20  is installed on the support supporter  13  of the rack body  10 , and the top edge of the bathtub side wall  22  is connected to the opening bracket  12  of the rack body  10 . When the shaping bracket  122  of the opening bracket  12  is rotated toward the direction close to the first support legs  111  of the supporting members  11 , the shaping bracket  122  can drive the bathtub side wall  22  of the bathtub  20  to deform to lower the height position of one end portion of the bathtub  20 ; when the adjusting bracket  123  of the opening bracket  12  is rotated toward the direction close to the second supporting legs  112  of the supporting members  11 , the adjusting bracket  123  can drive the bathtub side wall  22  of the bathtub  20  to deform to lower the height position of the swinging end portion  24  of the bathtub  20 ; when the first holding bracket  131  and the second holding bracket  132  are relatively rotated with respect to each other and tend to be stacked, the first holding bracket  131  and the second holding bracket  132  drive the bathtub bottom wall  21  of the bathtub  20  to deform to allow the two sides of the bathtub bottom wall  21  to deform, so as to allow two end portion thereof to move close to each other and tend to overlap with each other, so that the bath rack can be folded to reduce the size of the bath rack when not in use. 
     Correspondingly, when the first holding bracket  131  and the second holding bracket  132  are rotated with respect to each other and tend to be horizontal, the first holding bracket  131  and the second holding bracket  132  drive the bathtub bottom wall  21  of the bathtub  20  to deform, so as to allow the two end portions of the bathtub bottom wall  21  to move away from each other and tend to be horizontal; when the shaping bracket  122  of the opening frame rotate along a direction away from the first supporting leg  111  of the supporting members  11 , the shaping bracket  122  can drive the bathtub side wall  22  of the bathtub  20  to deform to reset the height position of the corresponding end portion of the bathtub  20 ; when the adjusting bracket  123  of the opening frame  12  is rotated in a direction away from the second supporting legs  112  of the supporting members  11 , the adjusting bracket  123  can drive the bathtub side wall  22  of the bathtub  20  to deform to reset the height position of the swing end portion  24  of the  20  so that the bath rack can be unfolded to allow the bathtub  20  to form the bathing space  23 . 
     Preferably, a middle part of the bathtub bottom wall  21  of the bathtub  20  comprises a force bearing part  211 , wherein the pulling element  1333  of the holding supporter  13  is connected to the bathtub bottom wall  21 , when an upward force is applied and exerted on the force bearing portion  211  of the bathtub bottom wall  21 , the bathtub bottom wall  21  transmits a pulling force to the pulling element  1333  of the holding supporter  13 , so as to allow the pulling element  1333  to pull upward the locking element  1332 , so as to slide the locking element  1332  out of the retaining groove  1323  of the second holding bracket  13 . 
     Continuing to refer to  FIGS.  1  to  10 E , the rack body  10  further comprises two extending legs  16 , each of the extending legs  16  respectively comprises two longitudinally extending legs  161  and at least one transversely extending leg  162 . The opposite ends of the transversely extending leg  162  are respectively connected to the two longitudinally extending legs  161 , wherein the two longitudinally extending legs  161  of one of the extending legs  16  are respectively detachably mounted on bottom end portions of the first supporting legs  111  of the two supporting members  11 , the two longitudinally extending legs  161  of the other extending leg  16  are respectively detachably mounted on bottom end portions of the second supporting legs  112  of the two supporting members  11 , so that the two extending legs  16  can not only increase the height at which the bathtub  20  is supported, but also improve the stability of the rack body  10 . 
     Continuing to refer to  FIGS.  1  to  10 E , the holding supporter  13  further comprises an auxiliary frame  134  mounted on the first outer end portion  1312  of the first holding bracket  131  for increasing an area of the holding supporter  13 , so that the holding supporter  13  can reliably support the bathtub bottom wall  21  of the bathtub  20 . Preferably, the auxiliary frame  134  is detachably mounted on the first outer end portion  1312  of the first holding bracket  131 . 
     Continuing to refer to  FIG.  1    to  FIG.  10 E , the bath rack further comprises a water outlet pipe  40  connected to the bathtub bottom wall  21  of the bathtub  20  to allow water or cleaning liquid in the cleaning space  23  to be discharged through the water outlet pipe  40 . 
     Continuing to refer to  FIGS.  1  to  10 E , an assembly end portion  31  of the foldable ladder  30  is mounted on the second outer end portion  1322  of the second holding bracket  132 . In this specific example of the bath rack of the present invention, the foldable ladder  30  can support the bathtub bottom wall  21  of the bathtub  20 , that is, the foldable ladder  30  and the holding supporter  13  can reliably cooperate to support the bathtub bottom wall  21  of the bathtub  20 . 
     Specifically, the foldable ladder  30  comprises a pair of first horizontal bars  301 , a pair of second horizontal bars  302 , a pair of third horizontal bars  303 , a pair of fourth horizontal bars  304 , a pair of first longitudinal bars  305 , a pair of second longitudinal bars  306 , a pair of third longitudinal bars  307 , a pair of fourth longitudinal bars  308  and a series of connecting rods  309 . The pair of the first horizontal bars  301 , the pair of the second horizontal bars  302 , the pair of the third horizontal bars  303  and the pair of the fourth horizontal bars  304  have height differences. End portions of the first horizontal bars  301  are respectively mounted on the second outer end portion  1323  of the second holding bracket  132  to allow the pair of the first horizontal bars  301  to cooperate with the second holding bracket  132  to reliably support the bathtub bottom wall  21  of the bathtub  20 . Tops of the pair of first longitudinal bars  305  are respectively pivotally connected to middles of the pair of first horizontal bars  301 , and bottoms thereof are respectively pivotally connected to end portions of the pair of the second horizontal bars  302 . Tops of the second longitudinal bars  306  are respectively pivotally connected to end portions of the first horizontal bars  301 , and middles thereof are rotatably connected to middles of the pair of second horizontal bars  302 , bottoms are respectively pivotally connected to end portions of the pair of third horizontal bars  303 . Tops of the pair of third longitudinal bars  307  are respectively pivotally connected to end portions of the pair of second horizontal bars  302 , middles thereof are respectively rotatably connected to the middles of the pair of third horizontal bars  303 , and bottoms are respectively pivotally connected to the pair of fourth horizontal bars  304 . Tops of the pair of fourth longitudinal bars  308  are respectively connected to end portions of the pair of third horizontal bars  303 , and bottoms thereof are respectively connected to the pair of the fourth longitudinal bars  303 . Tops of the pair of the first longitudinal bars  305 , the pair of the second longitudinal bars  306 , the pair of third longitudinal bars  307  and the pair of the fourth longitudinal bars  308  are respectively connected with one connecting bar  309 , and the middles of the pair of the second longitudinal bars  306  and the middles of the pair of the third longitudinal bars  307  are respectively connected with one connecting bar  309 . 
     When the foldable ladder  30  is unfolded, the pair of the first horizontal bars  301 , the pair of the second horizontal bars  302 , the pair of the third horizontal bars  303  and the pair of the fourth horizontal bars  304  are parallel to each other, the pair of the first longitudinal bars  305 , the pair of the second longitudinal bars  306 , the pair of the third longitudinal bars  307  and the pair of the fourth longitudinal bars  308  are parallel to each other, so the foldable ladder  30  form a plurality of step surfaces  33  for the pet to enter and exit the bathtub  20  at a high position through the step surfaces  33  of the foldable ladder  30  by itself. When the foldable ladder  30  is folded, the pair of the first horizontal bars  301 , the pair of the second horizontal bars  302 , the pair of the third horizontal bars  303  and the pair of the fourth horizontal bars  304  are stacked on each other, the pair of the first longitudinal bars  305 , the pair of the second longitudinal bars  306 , the pair of the third longitudinal bars  307  and the pair of the fourth longitudinal bars  308  are stacked on each other to hide the foldable ladder  30  under the bathtub  20  to prevent the foldable ladder  30  from affecting the bathing process. 
     Further, the foldable ladder  30  comprises a flexible bearing surface  310  which is connected in sequence with the pair of the first horizontal bars  301 , the pair of the second longitudinal bars  306 , the pair of the second horizontal bars  302 , the pair of the third longitudinal bars  307  and the pair of the third horizontal bars  303 , and a shape of the bearing surface  310  changes with the changed configuration of the foldable ladder  30 , wherein when the foldable ladder  30  is unfolded, the bearing surface  310  is unfolded synchronously to cover the step surfaces  33 , so that when the pets passes through the step surfaces  33  of the foldable ladder  30  to enter and exit the bathtub  20  at an elevated position, the bearing surface can prevent the pet from falling from a hollowed out position of the foldable ladder  30 . When the foldable ladder  30  is folded, the bearing surface  310  can be sandwiched between the pair of the second longitudinal bars  306  and the pair of the second horizontal bars  302 , and sandwiched between the pair of the third longitudinal bars  307  and the pair of the third horizontal bars  303 . 
       FIGS.  9 A to  9 D  show the unfolding process of the rack body  10 . When the bottoms of the first supporting legs  111  and the bottoms of the second supporting leg  112  are separated by relative rotation of the first supporting legs  111  and the second supporting legs  112 , on one hand, the first supporting legs  111  drive the first holding bracket  131  to rotate, and the second supporting legs  112  drive the second holding bracket  132  to rotate. The two holding brackets  132  are rotated relative to each other so that the first holding bracket  131  and the second holding bracket  132  tend to be horizontal. When the first holding bracket  131  and the second holding bracket  132  are rotated to be in a horizontal state, the locking element  1332  of the pivot mechanism  133  slides along the limiting groove  13312  of the pivot element  1331  to the retaining groove  1323  of the second holding bracket  132  to lock the first holding bracket  131  with the second holding bracket  132 . When the shaping bracket  122  is pulled away from the first supporting legs  11 , the opposite end portions of each of the first bracing elements  151  of the bracing members  15  are respectively rotate with respect to the corresponding first supporting leg  111  and the second bracing element  152 , and when the shaping bracket  122  is rotated to be in the horizontal state, the first bracing element  151  and the second bracing element  152  cooperate with each other to support shaping bracket  122  which is held in the horizontal state. When the adjusting bracket  123  is pulled away from the second supporting legs  112 , the opposite end portions  141   a  and  141   b  of each first locking arm  141  are respectively rotated with respect to the corresponding second supporting leg  112  and the second locking arm  142 , and when the first locking groove  1421  of the second locking arm  142  is aligned with the sliding groove  1411  of the first locking arm  141 , the locking element  143  slides to the first locking groove  1421  of the second locking arm  142 , so as to lock up the connection between the first locking arm  141  and the second locking arm  142 , so that the first locking arm  141  and the second locking arms  142  cooperate with each other to support the adjusting bracket  123  to be kept in a horizontal state. 
     In addition, the folding process of the frame body  10  is illustrated in the following description. The locking element  1332  is pulled upward by the pulling element  1333  to allow the locking element  1332  to slide out of the retaining groove  1323  of the second holding bracket  132 , continuing to pull the locking element  1332  upward through the pulling element  1333  to allow the locking element  1332  to drive the pivot element  1331  to move upward, and due to the principle of gravity, the first holding bracket  131  and the second holding bracket  132  can automatically rotate with respect to each other. At this time, on one hand, the first holding bracket  131  drives the first supporting leg  111  to rotate, and the second holding bracket  132  drives the second supporting legs  112  to rotate; on the other hand, the first supporting legs  111  and the corresponding second supporting legs  112  are rotated with respect to each other respectively, so that the first holding bracket  131  and the second holding bracket  132  tend to overlap and the supporting legs  111  and the corresponding second supporting legs  112  tend to overlap. And subsequently, the first holding bracket  131  and the second holding bracket  132  can be stacked, and the first supporting legs  111  and the corresponding second supporting legs  112  can be respectively stacked. When each first bracing element  151  is subjected to a force to allow the opposite end portions thereof to rotate with respect to the corresponding first supporting leg  111  and the second bracing element  152  respectively, the shaping bracket  122  can move toward the direction close to the first supporting legs  111 , and the shaping bracket  122  can be stacked on the first supporting legs  111 . When each locking element  143  slides out of the first locking groove  1421  of the second locking arm  142 , the two opposite end portions  141   a  and  142   a  of the first locking arm  141  can be respectively rotated with respect to the corresponding second supporting leg  112  and the second locking arm  142  to allow the adjusting bracket  123  to move toward the direction close to the second supporting legs  112 , and the adjusting bracket  123  can be stacked on the second supporting legs  112 . 
       FIGS.  10 A- 10 E  illustrate a process for bathing a pet using the bath rack. When the user applies a force to the operating arm  1446  of the operation member  144  of each locking member  14  to allow the operation member  144  to slide down along the first locking arm  141 , the operation member  144  drives the locking element  143  to slide out of the first locking groove  1421  of the second locking arm  142 . When the two opposite end portions of each first locking element  141  are respectively rotated with respect to the corresponding second supporting leg  112  and the second locking arm  142 , and the movable part  1423  of the second locking arm  142  is rotated with respect to the fixed part  1422 , the adjusting bracket  123  swings downward to lower the height position of the swinging end portion  24  of the bathtub  20 . Preferably, when the second locking groove  1424  of the second locking arm  142  is aligned with the sliding groove  1411  of the first locking arm  141 , the locking element  143  can slide to the second locking groove  1424  of the second locking arm  142 , so as to allow the swinging end portion  24  of the tub  20  to be held in a lower position. At this time, the pet can easily enter the bathing space  23  of the bathtub  20  through the foldable ladder  30  at the swinging end portion  24  of the bathtub  20  by itself. After the pet enters the bathing space  23  of the bathtub  20 , the adjusting bracket  123  can be forced to swing upward, and the upward movement of the adjusting bracket  123  can drive the movable part  1423  of the second locking arm  142  to rotate with respect to the fixed part  1422  and drives the first locking arm  141  to rotate with respect to the corresponding second supporting leg  112  and the second locking arm  142 . When the first locking groove  1421  of the second locking arm  142  of each locking member  14  is aligned with the sliding groove  1411  of the first locking arm  141 , the locking element  143  can slide to the first locking groove  1421  of the second locking arm  142 , so as to allow the locking element  143  to lock the connection position between the first locking arm  141  and the second locking arm  142 , so that the first locking arm  141  and the second locking arm  142  reliably support the adjusting bracket  123  in a horizontal state, and the foldable ladder  30  being folded can be hidden under the bathtub  20  to avoid affecting the cleaning process. 
     Referring to  FIG.  11    to  FIG.  18    of the drawings, a bath rack according to an alternative state of the above preferred embodiment of the present invention is illustrated, wherein the bath rack comprises a rack body  10 , a bathtub  20  and a foldable ladder  30 . The bathtub  20  is arranged on the rack body  10 , and the bathtub  20  is supported at a preset height by the rack body  10 , the foldable ladder  30  is arranged on the rack body  10 . When the foldable ladder  30  is unfolded, a pet is allowed to enter and exit the bathtub  20  through the foldable ladder  30  by itself, and the user can wash the pet&#39;s body in the bathtub  20 . Preferably, when the foldable ladder  30  is folded, the foldable ladder  30  can be hidden under the bathtub  20  to prevent the foldable ladder  30  from affecting the cleaning process. 
     Similar to the above preferred embodiment, the rack body  10  comprises two supporting members  11 , an opening frame  12  and a holding supporter  13 , wherein the two supporting members  11  are arranged symmetrically, and middle portions of two opposite sides of the opening frame  12  are respectively arranged on tops of the two supporting members  11 , and middle portions of two opposite sides of the holding supporter  13  are respectively arranged on the two supporting members  11 , so as to support the opening frame  12  at a suitable height and supports the holding supporter  13  at a suitable height by the two supporting members  11 . 
     The bathtub  20  comprises a bathtub bottom wall  21  and a bathtub side wall  22  upwardly extended from a periphery of the bathtub bottom wall  21 . The bathtub bottom wall  21  is supported by the holding supporter  13 . A top edge of the bathtub side wall  22  is connected to the opening frame  12 , so as to form a bathing space  23  between the tub bottom wall  21  and the bathtub side wall  22  for storing water or a cleaning liquid, and the pet can be received in the bathing space  23  so as to allow the user to wash the pet&#39;s body in the bathtub  20 . 
     The foldable ladder  30  comprises an installation end portion  31  and a standing end portion  32  opposite to the installation end portion  31 , and the installation end portion  31  of the foldable ladder  30  is mounted to the rack body  10 . When the foldable ladder  30  is unfolded to allow the standing end portion  32  to stand and contact the ground, a position of a center of gravity of the foldable ladder  30  can be lowered, and the position of the center of gravity of the foldable ladder  30  is close to the position of the center of gravity of the rack body  10 , so that the stability of the bath rack is ensured, and thus when the pet enters and exits the bathtub  20  through the foldable ladder  30  by itself, the bath rack can be prevented from tipping over and the reliability of the bath rack can be ensured. 
     Each of the supporting member  11  comprises a first supporting leg  111  and a second supporting leg  112 , and top end portions of the first supporting legs  111  and the second supporting legs  112  are pivotally installed with each other to form the top of the corresponding supporting member  11 . In this embodiment, the foldable ladder  30  comprises a mounting rod  34  mounted to the two supporting members  11 . More specifically, two ends  341  of the mounting rod  34  is rotatably mounted to two second supporting legs  112 , so that the foldable ladder  30  is pivotally mounted to the rack body  10 . 
     The installation end portion  31  of the foldable ladder  30  comprises two installation arms  311  mounted to the mounting rod  34 . Accordingly, the two installation arms  311  are parallelly and spacedly mounted at two sides of the mounting rod  34 , so that the foldable ladder  30  can be pivotally moved when the mounting rod  34  is rotated. Alternatively, the foldable ladder  30  is not provided with the mounting rod  34 , and the two installation arms  311  may be directly pivotally mounted to the two second supporting legs  112 . 
     Similar to the above preferred embodiment, the foldable ladder  30  comprises a pair of first horizontal bars  301 , a pair of second horizontal bars  302 , a pair of third horizontal bars  303 , a pair of fourth horizontal bars  304 , a pair of first longitudinal bars  305 , a pair of second longitudinal bars  306 , a pair of third longitudinal bars  307 , a pair of fourth longitudinal bars  308  and a series of connecting rods  309 . The pair of the first horizontal bars  301 , the pair of the second horizontal bars  302 , the pair of the third horizontal bars  303  and the pair of the fourth horizontal bars  304  have height differences. End portions of the first horizontal bars  301  are respectively transversely extended from the two installation arms  311 , so as to move along with the installation arms  311  and the mounting rod  34 . 
     Tops of the pair of first longitudinal bars  305  are respectively pivotally connected to middles of the pair of first horizontal bars  301 , and bottoms thereof are respectively pivotally connected to end portions of the pair of the second horizontal bars  302 . Tops of the second longitudinal bars  306  are respectively pivotally connected to end portions of the first horizontal bars  301 , and middles thereof are rotatably connected to middles of the pair of second horizontal bars  302 , bottoms are respectively pivotally connected to end portions of the pair of third horizontal bars  303 . Tops of the pair of third longitudinal bars  307  are respectively pivotally connected to end portions of the pair of second horizontal bars  302 , middles thereof are respectively rotatably connected to the middles of the pair of third horizontal bars  303 , and bottoms are respectively pivotally connected to the pair of fourth horizontal bars  304 . Tops of the pair of fourth longitudinal bars  308  are respectively connected to end portions of the pair of third horizontal bars  303 , and bottoms thereof are respectively connected to the pair of the fourth longitudinal bars  303 . Tops of the pair of the first longitudinal bars  305 , the pair of the second longitudinal bars  306 , the pair of third longitudinal bars  307  and the pair of the fourth longitudinal bars  308  are respectively connected with one connecting bar  309 , and the middles of the pair of the second longitudinal bars  306  and the middles of the pair of the third longitudinal bars  307  are respectively connected with one connecting bar  309 . 
     When the foldable ladder  30  is unfolded, the pair of the first horizontal bars  301 , the pair of the second horizontal bars  302 , the pair of the third horizontal bars  303  and the pair of the fourth horizontal bars  304  are parallel to each other, the pair of the first longitudinal bars  305 , the pair of the second longitudinal bars  306 , the pair of the third longitudinal bars  307  and the pair of the fourth longitudinal bars  308  are parallel to each other, so the foldable ladder  30  form a plurality of step surfaces  33  for the pet to enter and exit the bathtub  20  at a high position through the step surfaces  33  of the foldable ladder  30  by itself. When the foldable ladder  30  is folded, the pair of the first horizontal bars  301 , the pair of the second horizontal bars  302 , the pair of the third horizontal bars  303  and the pair of the fourth horizontal bars  304  are stacked on each other, the pair of the first longitudinal bars  305 , the pair of the second longitudinal bars  306 , the pair of the third longitudinal bars  307  and the pair of the fourth longitudinal bars  308  are stacked on each other to hide the foldable ladder  30  under the bathtub  20  to prevent the foldable ladder  30  from affecting the bathing process. In this embodiment, the second horizontal bars  302  and third horizontal bars  303  may have a same length, and the length of each of the fourth horizontal bars  304  is half of the length of the second horizontal bars  302  and third horizontal bars  303 . The length of the first longitudinal bars  305  and the fourth longitudinal bars  308  can be half of the length of the second longitudinal bars  306  and third longitudinal bars  307 . 
     In this embodiment, the mounting rod  34  is provided under the holding supporter  13 , and the first holding bracket  131  and the second holding bracket  132  can be symmetrical with each other, such as a U-shaped frame, and they are not required for mounting the foldable ladder  30 . The foldable ladder  30  is thus mounted under the holding supporter  13 . 
     The foldable ladder  30  comprises a flexible bearing surface  310  which is connected in sequence with the pair of the first horizontal bars  301 , the pair of the second longitudinal bars  306 , the pair of the second horizontal bars  302 , the pair of the third longitudinal bars  307  and the pair of the third horizontal bars  303 , and a shape of the bearing surface  310  changes with the changed configuration of the foldable ladder  30 , wherein when the foldable ladder  30  is unfolded, the flexible bearing surface  310  is covered on the step surfaces  33  for supporting the pet. 
     According to this preferred embodiment, when the foldable ladder  30  is in the unfolded state, the mounting rod  34  is rotated upward, the two installation arms  311  are moved along with the mounting rod  34  to a state that the two installation arms  31  are vertically extending along a height direction, so as to direct the top horizontal bars that are the first horizontal bars  301  to be moved to a state that the first horizontal bars  301  are extending along a horizontal direction. And then the pair of the second horizontal bars  302 , the pair of the third horizontal bars  303  and the pair of the fourth horizontal bars  304  are also moved to the unfolded state in which they are extending along the horizontal direction, and the pair of the first longitudinal bars  305 , the pair of the second longitudinal bars  306 , the pair of the third longitudinal bars  307  and the pair of the fourth longitudinal bars  308  are moved to the unfolded state in which they are extending along a vertical and longitudinal direction, so that two adjacent horizontal bars and two adjacent longitudinal bars form a rectangular frame  300  that can stably support the pet on the step surfaces  33 . 
     According to this preferred embodiment, the two installation arms  311  are vertically connected to the mounting rod  34 , the first horizontal bars  301  are transversely connected to the two installation arms  311 , the two installation arms  311  and the first horizontal bars  301  are driven to move when the mounting rod  34  is rotated. In an alternative mode, the mounting rod  34  may be fixed to the pair of second supporting legs  112  while the two installation arms  311  are rotatably coupled to the mounting rod  34 , so as to direct the movement of the first horizontal bars  301 , so that the foldable ladder  30  can be moved to the unfolded state. 
     Preferably, each of the two installation arms  311  is provided with a mounting sleeve  312  at each end thereof, so as to mount each installation arm  311  with the mounting rod  34  or the first horizontal bar  301 . 
     The foldable ladder  30  further comprises a bracing arm  35  comprising a pivot end  351  that is pivotally connected to a middle of the bottom horizontal bar that is the fourth horizontal bar  304 , and a biasing end  352  at an opposite side of the pivot end  351 . The foldable ladder  30  further comprises a stopper arm  36  which is transversely extended from a lateral side of the bottom longitudinal bar that is the fourth longitudinal bar  308 . The biasing end  352  of the bracing arm  35  is biasing against the stoper arm  36 , so as to retain the position of the fourth horizontal bar  304  and the fourth longitudinal bar  308 , so that the structural strength of the frame formed by all of the horizontal bars and the longitudinal bars can be enhanced. 
     As shown in  FIGS.  11  and  12    of the drawings, and the biasing end  352  of the bracing arm  35  has a stopper groove  3521  and the stopper arm  36  is engaged and retained at the stopper groove  3521 , so as to retain the bracing arm  35  between the fourth horizontal bar  304  and the fourth longitudinal bar  308 , so as to form a stable supporting structure for the pet. 
     In addition, the foldable ladder  30  further comprises a plurality of bracing belts  37  which are mounted to middles of the pair of horizontal bars, so as to ensure that the horizontal bars are firmly connected to the adjacent longitudinal bars, so that the structural strength of the foldable ladder  30  is enhanced. 
     As shown in  FIG.  17    of the drawings, when the rack body  10 , the bathtub  20  and the foldable ladder  30  are in the unfolded state, and when the swinging end portion  24  of the bathtub  20  is lowered down to define a lateral exit opening  25  which is communicated to the bathing space  23  in the bathtub  20 , the pet can enter the bathing space  23  by stepping on the step surfaces  33  formed by the foldable ladder  30  in the unfolded state and stably supported by the horizontal bars and the longitudinal bars. And then the wining end portion  24  of the bathtub  20  is swung up so that washing liquid can be contained in the bathing space  23  of the bathtub  20  for cleaning the pet. In addition, a mattress or a supporting pad can be provided at a bottom of the bathing space  23  of the bathtub  20  to provide a flat and rigid supporting surface to the pet. 
     Referring to  FIGS.  13  to  16    of the drawings, after use, the bath rack can be moved into the folded state in which the rack body  10 , the bathtub  20  and the foldable ladder  30  are folded. More specifically, the mounting rod  34  of the foldable ladder  30  can be rotated downward, so as to drive the installation arms  311  to move downward, and the first horizontal bars  301  can be pivotally moved to a position that they are vertically extended, and then the rest horizontal bars  302 ,  303  and  304  are all pivotally moved to be parallel with the first horizontal bars  301 , and the longitudinal bars  305 ,  306 ,  307  and  308  are also folded and overlapped with each other, so that the foldable ladder  30  is folded into a compact structure. 
     The foldable ladder  30  further comprises a lock unit  38  which comprises a lock base  381  and a lock arm  382 , the lock arm  382  can be locked with the lock base  381  when the foldable ladder  30  is in the folded state, the lock base  381  and the lock arm  382  can be mounted to two connecting rods  309 , so as to overlappedly align the portions of the flexible bearing surface  310 , and maintain the folded configuration of the foldable ladder  30 . In addition, the lock base  381  may has one or more lock groove  383 , and the lock arm  382  comprises one or more lock protrusion  384 , when the lock arm  382  is inserted into the lock base  381 , the lock protrusion  384  can be retained at the lock groove  382  and protruded out of the lock groove  383  so as to lock the lock arm  382  with the lock base  381 . Accordingly, the lock protrusion  384  can be pressed so as to allow the lock protrusion  384  to escape from the corresponding lock groove  383 , so that the lock arm  382  can be detached from the lock base  381 . 
     It is worth mentioning that when the foldable ladder  30  is in the folded state, the foldable ladder  30  can be hanging on the rack body  10  under the bathtub  20 , the rack body  10  and the bathtub  30  can also be moved into the folded state without requiring to detach the foldable ladder  30  from the rack body  10  first 
     Referring to  FIGS.  19  to  27    of the drawings, a bathtub according to another alternative mode of the above preferred embodiment of the present invention is illustrated. In this embodiment, the structure for connecting the edge  220  of the bathtub side wall  22  of the bathtub  20  with the top supporting arm  11  is illustrated. Accordingly, the present invention provides a bathtub assembly  200  which comprises the bathtub  20  and two brackets  120  which are embodied as the shaping bracket  122  and the adjusting bracket  123 , the edge  220  of the bathtub side wall  22  is mounted to the two brackets  120 . 
     More specifically, the edge  220  of the bathtub side wall  22  comprises an edge sleeve  221  and two fixing ribs  222 , the edge sleeve  221  of the bathtub side wall  22  has two mounting holes  2211  and two retaining channels  2212 , each mounting hole  2211  is communicated to the corresponding retaining channel  2212 , the edge  220  of the bathtub side wall  22  comprises two fixing ribs  222  which are respectively inserted into the two retaining channels  2212  through the two mounting holes  2211 , so that the two fixing ribs  222  are respectively retained in the two retaining channels  2212 . 
     Referring to  FIGS.  19  to  25    of the drawings, the bathtub assembly  200  comprises two brackets  120 , each of the bracket  120  comprises a rod body  1201  having a fixing cavity  1202  and a slot  1203  extended along a length of the rod body  1201  and communicated to the fixing cavity  1202 . 
     As shown in  FIGS.  20  to  25    of the drawings, each rod body  1201  is sleeved on the edge sleeve  221  of the bathtub side wall  22  through a position corresponding to the mounting hole  2211  of the edge sleeve  221 , so that the edge  220  of the bathtub side wall  22  comprising the two fixing ribs  312  and the edge sleeve  221  are respectively received and retained in the fixing cavities  1202  of the two rod bodies  1201  of the two brackets  120 . 
     Accordingly, the rack body  10  rack body  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 rack body  10  rack body  10  may be Iron, Copper, or Aluminium. The bathtub  20  of the bathtub assembly  200  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 bathtub  20  is constructed to be easy to be folded up with a folding of the rack body  10  and unfolded with an unfolding of the rack body  10 , when the rack body  10  is unfolded, the rack body  10  is supported in the unfolded mode by the pivot mechanism  133  to provide a rigid support to the bathtub  20 , and the pivot mechanism  133  is able to be operated to release the rigid support of the rack body  10  when the rack body  10  is operated from the unfolded state to the folded state. 
     The two brackets  120  can be made of rigid material such as metal, metal alloy, and plastic. The two fixing ribs  222  can be flexible rods that allow each fixing rib  222  to pass through the corresponding curved retaining channel  2212  which may have a semicircle shape. When the two fixing ribs  222  are respectively retained in the two retaining channels  2212  of the edge sleeve  221 , the material of the edge sleeve  221  is sandwiched between the inner surface around the fixing cavity  1202  of the rod body  1201  of each bracket  120  and the fixing ribs  222 , so that the edge sleeve  221  of the edge  220  of the bathtub side wall  22  is firmly retained and mounted by the two brackets  120 . The shape and size of the fixing ribs  222  are respectively matched with the fixing cavities  1202  of the rod bodies  1201  of the two brackets  120 , such as that the fixing ribs  222  are engaged with the corresponding two fixing cavities  1202  of the rod bodies  1201  of the two brackets  120  by a snap-fit engaging manner or an interference fit engaging manner, so as to prevent the fixing ribs  222  from slipping out of the fixing cavities  1202 . 
     As an example, the two brackets  120  can be made of Aluminium, and each of the rod body  1201  is an aluminium rod. The two brackets  120  thus can provide a relatively rigid support to the bathtub  20  and the two brackets  120  define a top opening  26  of the bathtub assembly  200 , the top opening  26  is also defined and surrounded by the bathtub side wall  22  of the bathtub  20 . Since the two brackets  1201  are made of rigid material, the shape of the top opening  26  of the bathtub assembly  200  is maintained. The engagement between the brackets  120  and the edge  220  comprising the fixing ribs  222  and the edge sleeve  221  enables that the edge  220  has a relatively flat surface and the bathtub side wall  22  also has a flat surface that is not easy to form a wrinkle surface, so that the aesthetic appearance of the bathtub assembly  200  is further enhanced. 
     In addition, the engagement between the two brackets  120  and the edge  220  comprising the fixing ribs  222  and the edge sleeve  221  also enables that the edge  220  of the bathtub  20  is detachably mounted to the two brackets  120  so that the bathtub  20  can be easy to be detached from the two brackets  120  for cleaning. 
     Accordingly, the top side of the bathtub assembly  200  is arranged with the two brackets  120 , so that the aesthetic appearance of the bathtub assembly  200  is enhanced. In other alternative modes, the two brackets  120  may be rods that can be deformed and may be inserted into the edge sleeve  221 , however, the structural strength of the bathtub assembly  200  may be relatively weak and the shape of the top opening  26  of the bathtub assembly  200  may not be guaranteed. Two rigid brackets  120  are not suitable for being directly inserted into the retaining channels  2212  through the mounting holes  2211 , since the operation is difficult and the surface of the bathtub side wall  22  is easy to be corrugated. Alternatively, the two brackets  120  may be rigid rods that are placed between the two layers of the material of the edge sleeve  221  and then the two layers of the material of the edge sleeve  221  are sewed with each other for retaining the two brackets  120  within the edge  220 . However, this configuration will result in that the surface of the edge  220  is not flat because of the additional sewing process, and the manufacturing procedure is relatively complicated, and also the bathtub  20  is fixed to the two brackets  120  can not be detached from the two brackets  120  for cleaning. 
     In other words, the brackets  120  can be coupled with the edge  220  of the bathtub side wall  22  by any suitable manners, but it is preferred that the two brackets  120  are respectively engaged with the edge  220  by means of the fixing ribs  222  and the edge sleeve  221 . The edge sleeve  221  is not required to be formed with a mounting slot at a top side thereof, so that the top surface of the edge sleeve  221  is flat. 
     In this embodiment, each of the two brackets  1201  is formed with a U-shape, and the two mounting ends  1204  of the rod bodies  1201  of the two brackets  120  are spaced with each other. Accordingly, the edge  220  of the bathtub side wall  22  define two central foldable portions  223  at two opposite sides thereof that are not received in the fixing cavities  1202  of the rod bodies  1201  of the two brackets  120 , so that when the two brackets  120  are folded and overlapped with each other, the two central foldable portions  223  of the edge  220  of the bathtub side wall  22  of the bathtub  20  is folded to allow the entire bathtub  20  to be folded. 
     As shown in  FIG.  26    and  FIG.  27    of the drawings, the two brackets  120  are pivotally mounted to the two connecting elements  121 , so that the two brackets  120  are pivotally mounted with the two connecting elements  121  at positions corresponding to the central foldable portions  223  of the edge  220  of the bathtub side wall  22  of the bathtub  20 , so that when the two brackets  120  are folded and overlapped with each other, the two central foldable portion  223  of the edge  220  of the bathtub side wall  22  of the bathtub  20  is folded to allow the entire bathtub  20  to be folded. Each of the two central foldable portions  223  also may be retained in the connecting element  121  so as to be hidden in the corresponding connecting element  121 . 
     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 are subject to change without departure from such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.