Patent Publication Number: US-2021186233-A1

Title: Travel bassinet

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a divisional application of and claims the benefit of U.S. non-provisional application Ser. No. 15/867,733 filed Jan. 11, 2018, and is included herein by reference. The U.S. non-provisional application Ser. No. 15/867,733 claims the benefit of U.S. provisional application No. 62/444,924 (which was filed on Jan. 11, 2017), U.S. provisional application No. 62/489,850 (which was filed on Apr. 25, 2017), and U.S. provisional application No. 62/599,320 (which was filed on Dec. 15, 2017). The disclosures of the prior applications are incorporated herein by reference herein in their entirety. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a travel bassinet, and more particularly, to a travel bassinet with folding and unfolding functions for easy convenience. 
     2. Description of the Prior Art 
     A play yard frame provides an enclosed region where a young child can play and sleep inside, and a conventional bassinet can be put on an upper level of top rails of the play yard frame to elevate a bottom surface of the bassinet for the young child to play and sleep. However, the current location of assembly of the play yard frame and the conventional bassinet limits the caregiver&#39;s sight of the young child from a side of the said assembly; dimensions of the conventional bassinet are smaller than dimensions of the play yard frame, and the child&#39;s region of activity is constrained due to the stationary barrier of the play yard frame and the conventional bassinet. 
     SUMMARY OF THE INVENTION 
     The present invention provides a travel bassinet with folding and unfolding functions for easy convenience for solving above drawbacks. 
     According to the claimed invention, the travel bassinet includes a lower frame and an upper frame assembled with the lower frame. The lower frame includes a pivoting joint module, a first structural member, a second structural member and a plurality of legs. The first structural member is pivotally connected with the pivoting joint module, and the first structural member is adapted to switch between a folded position and an unfolded position. The second structural member is pivotally connected with the pivoting joint module and opposite to the first structural member, and the second structural member is adapted to switch between the folded position and the unfolded position. The plurality of legs includes a first leg and a second leg pivotally connected with two ends of the first structural member, and further includes a third leg and a fourth leg pivotally connected with two ends of the second structural member. The upper frame includes a plurality of holders, a fixed end structure, and a foot structure. The plurality of holders includes a first holder and a second holder respectively disposed on the first leg and the second leg, and further includes a third holder and a fourth holder respectively disposed on the third leg and the fourth leg. Two ends of the fixed end structure are respectively disposed on the first holder and the second holder. The foot structure is connected between the third holder and the fourth holder. The foot structure is moved far from the fixed end structure while the first structural member and the second structural member are switched to the unfolded position, and is further moved close to the fixed end structure while the first structural member and the second structural member are switched to the folded position. 
     According to the claimed invention, the pivoting joint module is lifted and lowered to switch the first structural member and the second structural member between the folded position and the unfolded position. The upper frame further includes a pivoting end panel pivotally connected with the foot structure, and the pivoting end panel is rotated to an upward position for enclosing an accommodating space of the travel bassinet and further rotated to a downward position for enlarging the accommodating space. The pivoting end panel comprises a main body and a hinge portion, and the hinge portion is disposed on an edge of the main body and engaged with the foot structure. 
     According to the claimed invention, the pivoting end panel includes a main body, a support foot, a support foot latch, a panel latch and a release handle. The support foot is rotatably disposed on the main body. The support foot latch is movably disposed on the main body. The panel latch is movably disposed on the main body. The release handle is slidably disposed on the main body and connected with the support foot latch and the panel latch. The release handle stays in a lock position to contact the support foot latch against the support foot so as to keep the support foot in a hiding position, and further to engage the panel latch with an engaging portion disposed on one of the third holder and the fourth holder so as to fasten the pivoting end panel on the upward position. The release handle is moved from the lock position to an unlock position to disengage the panel latch from the engaging portion, and further to separate the support foot latch from the support foot. The pivoting end panel further comprises a torsional spring disposed between the support foot and the main body, and a recovering force of the torsional spring is adapted to rotate the support foot from a hiding position to an exposing position. The pivoting end panel is covered by fabric material. 
     According to the claimed invention, the upper frame further includes a first side structure and a second side structure respectively located between the fixed end structure and the foot structure. The first side structure and the second side structure are detachably disposed on the plurality of holders. The upper frame further includes a plurality of corner uprights respectively disposed on the plurality of holders, and the first side structure and the second side structure are connected with the fixed end structure and the foot structure via the plurality of corner uprights. 
     According to the claimed invention, the side structure includes a pivot portion and two bar portions, and two ends of each bar portion are respectively connected with the pivot portion and one of plurality of corner uprights. The two bar portions are parallel while the first structural member and the second structural member stay in the unfolded position, and are rotated relative to the pivot portion in a non-parallel state while the first structural member and the second structural member stay in the folded position. The two bar portions are rotated downwardly or laterally while the first structural member and the second structural member are switched from the unfolded position to the folded position. The pivoting joint module is moved upward to drive rotation of the two bar portions relative to the pivot portion, so as to approach the fixed end structure and the foot structure by folding the first structural member and the second structural member accordingly. 
     According to the claimed invention, the pivoting joint module includes a plate portion with two axle holes, and the first structural member and the second structural member are respectively assembled with the two axle holes. The pivoting joint module further includes a protruding portion disposed under the plate portion. The first structural member and the second structural member are folded and unfolded vertically to approach the fixed end structure and the foot structure. 
     According to the claimed invention, the pivoting joint module includes a central pivot portion, two bridging pivot portions and two linking portions. Each of the linking portions is connected between the central pivot portion and one of the bridging pivot portions, and any of the bridging pivot portions is connected between the first structural member and the second structural member. The central pivot portion is moved upward to lift the two linking portions and to close the two bridging pivot portions, the first structural member and the second structural member are rotated relative to the two bridging pivot portions and the plurality of legs, so as to approach the fixed end structure and the foot structure. The first structural member and the second structural member are folded and unfolded horizontally to approach the fixed end structure and the foot structure. 
     According to the claimed invention, the first side structure includes a first bar portion, a second bar portion and a joint portion. The first bar portion and the second bar portion are respectively disposed on the fixed end structure and the foot structure in a rotatable manner, and the joint portion is disposed on the second bar portion and detachably assembled with the first bar portion. The first bar portion includes a constraining slot, and the fixed end structure includes a protrusion slidably located inside the constraining slot to constrain rotation of the first bar portion. One of the upper frame and the lower frame is attached to a play yard frame to suspend the travel bassinet above a floor. 
     According to the claimed invention, the travel bassinet includes a first side structure, a second side structure, a fixed end structure and a pivoting end panel. The fixed end structure is disposed between ends of the first side structure and the second side structure. The pivoting end panel is movably disposed between the first side structure and the second side structure and opposite to the fixed end structure. The pivoting end panel is utilized to switch between a first operation mode and a second operation mode for adjusting an accommodating space of the travel bassinet. The pivoting end panel is rotatably assembled with the first side structure and the second side structure, or is detachably assembled with the first side structure and the second side structure. The pivoting end panel is switched to the first operation mode to enclose the accommodating space, and is further switched to the second operation mode to enlarge the accommodating space. The travel bassinet is put on a floor or attached to a play yard frame for suspending above the floor. 
     The present invention provides the travel bassinet having for use positions, and the lower frame and the upper frame of the travel bassinet can be adjusted according to the designated use position. The first use position is the travel bassinet can be put on the floor with the enclosed pivoting end panel; the second use position is the pivoting end panel can be removed from or unfolded relative to the travel bassinet put on the floor for the enlarged accommodating space; the third use position is the travel bassinet can be attached to the play yard frame at the low level position; and the fourth use position is travel bassinet can be attached to the play yard frame at the high level position. The lower frame and the upper frame are made by several foldable units, so the lower frame and the upper frame can be easily folded for easy transport of the travel bassinet. 
     These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a diagram of a travel bassinet in a first operation mode according to an embodiment of the present invention. 
         FIG. 2  is a diagram of the travel bassinet n a second operation mode according to the embodiment of the present invention. 
         FIG. 3  and  FIG. 4  respectively are diagrams of the travel bassinet attached to a play yard frame in different operation modes according to the embodiment of the present invention. 
         FIG. 5  is a diagram of a pivoting end panel according to the embodiment of the present invention. 
         FIG. 6  and  FIG. 7  respectively are diagrams of the travel bassinet in different operation modes according to a first embodiment of the present invention. 
         FIG. 8  and  FIG. 9  respectively are diagrams of the travel bassinet in different operation modes according to a second embodiment of the present invention. 
         FIG. 10  and  FIG. 11  respectively are diagrams of the travel bassinet in different operation modes according to a third embodiment of the present invention. 
         FIG. 12  to  FIG. 14  respectively are diagrams of the travel bassinet in different operation modes according to a fourth embodiment of the present invention. 
         FIG. 15  is another view of the travel bassinet shown in  FIG. 12 . 
         FIG. 16  is another view of the travel bassinet shown in  FIG. 14 . 
         FIG. 17  is an enlarged diagram of a part of the first side structure according to the fourth embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION 
     Please refer to  FIG. 1  to  FIG. 4 .  FIG. 1  is a diagram of a travel bassinet  10  in a first operation mode according to an embodiment of the present invention.  FIG. 2  is a diagram of the travel bassinet  10  in a second operation mode according to the embodiment of the present invention.  FIG. 3  and  FIG. 4  respectively are diagrams of the travel bassinet  10  attached to a play yard frame  12  in different operation modes according to the embodiment of the present invention. Soft goods can be laid down on the accommodating space inside the travel bassinet  10 . In the first operation mode, a pivoting end panel  14  is used to enclose the accommodating space; in the second operation mode, the pivoting end panel  14  is rotated, unfolded or removed to enlarge the accommodating space. Further, the travel bassinet  10  can be attached to the play yard frame  12  at high level position and low level position for different operation modes. 
     The travel bassinet  10  includes the pivoting end panel  14 , a first side structure  16 , a second side structure  18  and a fixed end structure  20 . The fixed end structure  20  is disposed between ends of the first side structure  16  and the second side structure  18 . The pivoting end panel  14  is movably disposed between the first side structure  16  and the second side structure  20  and opposite to the fixed end structure  20 . The pivoting end panel  14  can be switched between the first operation mode shown in  FIG. 1  and the second operation mode shown in  FIG. 2  for adjusting a region of activity inside the accommodating space. A mattress  22  (which may be one of the foresaid soft goods) can be disposed inside the travel bassinet  10  for comfort; moreover, the travel bassinet  10  may dispose fabric material on the pivoting end panel  14 , the first side structure  16 , the second side structure  18  and the fixed end structure  20  to create safety space for child. The travel bassinet  10  can be put on a floor as purposes of a bassinet or a child bed, and the pivoting end panel  14  has a support foot standing on the floor so as to level a surface of the pivoting end panel  14  with the mattress  22 . 
     The travel bassinet  10  is attached to the play yard frame  12  for suspending above the floor. As shown in  FIG. 3 , the travel bassinet  10  can be attached to the play yard frame  12  at the low level position; the travel bassinet  10  may stay on the low level position by abutting against construction of the play yard frame  12 . For example, a lower framework and an upper framework circled by the pivoting end panel  14 , the first side structure  16 , the second side structure  18  and the fixed end structure  20  have dissimilar dimensions, and a top size of the play yard frame  12  may be larger than the lower framework but smaller than the upper framework, so the lower framework passes deep into the play yard frame  12  and the upper framework abuts against the play yard frame  12 . As shown in  FIG. 4 , the travel bassinet  10  can be attached to the play yard frame  12  at the high level position, and the travel bassinet  10  optionally includes a contacting portion  24  abutted against the play yard frame  12  to steady the travel bassinet  10  on the high level position. The contacting portion  24  is rotated to be distant from the play yard frame  12  while the travel bassinet  10  is switched to the low level operation mode shown in  FIG. 3 . 
     Please refer to  FIG. 5 .  FIG. 5  is a diagram of the pivoting end panel  14  according to the embodiment of the present invention. The pivoting end panel  14  includes a main body  26 , a support foot  28 , a support foot latch  30 , a panel latch  32 , a release handle  34  and a torsional spring  36 . The support foot  28  is rotatably disposed on the main body  26 , and used to stand on the floor while the travel bassinet  10  is switched to the second operation mode. The support foot latch  30  is movably disposed on the main body  26  and utilized to detachably engage with the support foot  28 . The panel latch  32  is movably disposed on the main body  26  and utilized to detachably engage with an engaging portion (which is not shown in figures) disposed on at least one of the first side structure  16  and the second side structure  18 . The torsional spring  36  is disposed between the support foot  28  and the main body  26 , and a recovering force of the torsional spring  36  is adapted to rotate the support foot  28  from a hiding position (which is accommodated into a sunken portion on the main body  26 ) to an exposing position (which protrudes from the sunken portion). 
     The release handle  34  is slidably disposed on the main body  26  and connected with the support foot latch  30  and the panel latch  32 . While the release handle  34  stays in a lock position, the support foot latch  30  can contact against the support foot  28  by engagement to keep the support foot  28  in the hiding position, as shown in  FIG. 5 , and the panel latch  32  is engaged with at least one of the first side structure  16  and the second side structure  18  to fasten the pivoting end panel  14  on an upward position, as shown in  FIG. 1 . While the release handle  34  is moved from the lock position to an unlock position, such as being moved to left from an initial position shown in  FIG. 5 , the panel latch  32  is disengaged from the first side structure  16  or the second side structure  18 , and the support foot latch  30  is separated from the support foot  28 ; the pivoting end panel  14  can be rotated from the upward position to a downward position, and the support foot  28  can be switched from the hiding position to the exposing position for standing on the floor, as shown in  FIG. 2 . 
     Please refer to  FIG. 6  and  FIG. 7 .  FIG. 6  and  FIG. 7  respectively are diagrams of the travel bassinet  10  in different operation modes according to a first embodiment of the present invention. The travel bassinet  10  has an upper frame  38  and a lower frame  40  assembled with each other. The upper frame  38  may include the pivoting end panel  14 , the first side structure  16 , the second side structure  18 , the fixed end structure  20 , a plurality of holders  42  and a foot structure  44 ; the lower frame  40  may include a pivoting joint module  46 , a first structural member  48 , a second structural member  50  and a plurality of legs  52 . The pivoting end panel  14  is pivotally connected with the foot structure  44 , and can be rotated to the upward position for enclosing the accommodating space and further rotated to the downward position for enlarging the accommodating space. In another possible embodiment, the pivoting end panel  14  may be removed from the foot structure  44  to switch between the upward position and the downward position. 
     For example, the pivoting end panel  14  includes a hinge portion  54  disposed on an edge of the main body  26 . The hinge portion  54  can be an enclosed structure engaged with the foot structure  44 , so that the pivoting end panel  14  can be switched between the upward position and the downward position in a rotatable manner. Besides, the hinge portion  54  can be a C-typed structure engaged with the foot structure  44 , and the pivoting end panel  14  can be switched between the upward position and the downward position in the rotatable manner or in a detachable manner. 
     The first structural member  48  and the second structural member  50  are opposite and pivotally connected with the pivoting joint module  46 . The first structural member  48  and the second structural member  50  can be switched between a folded position (as shown in  FIG. 7 ) and an unfolded position (as shown in  FIG. 6 ). The legs  52  includes a first leg  52   a  and a second leg  52   b  pivotally connected with two ends of the first structural member  48 , and a third leg  52   c  and a fourth leg  52   d  pivotally connected with two ends of the second structural member  50 . Accordingly, the holders  42  includes a first holder  42   a  and a second holder  42   b  respectively disposed on the first leg  52   a  and the second leg  52   b,  and a third holder  42   c  and a fourth holder  42   d  respectively disposed on the third leg  52   c  and the fourth leg  52   d.  The fixed end structure  20  is disposed between the first side structure  16  and the second side structure  18  via the first holder  42   a  and the second holder  42   b,  and the foot structure  44  may be connected between the third holder  42   c  and the fourth holder  42   d  or be a part of the second structural member  50  located between the third leg  52   c  and the fourth leg  52   d.    
     In the first embodiment, the first side structure  16  and the second side structure  18  are detachably disposed on the plurality of holders  42 . The pivoting joint module  46  can include a plate portion  64  with two axle holes  641 , and a protruding portion  66  disposed under the plate portion  64 . The plate portion  64  is used to support the mattress  22 , and the protruding portion  66  is used to stand on the floor. The first structural member  48  and the second structural member  50  are respectively assembled with the two axle holes  641 . The first side structure  16  and the second side structure  18  can be removed from the holders  42  and then the pivoting joint module  46  can be lifted to rotate the first structural member  48  and the second structural member  50 ; therefore, the first structural member  48  and the second structural member  50  can be switched from the unfolded position to the folded position, and the foot structure  44  (and the pivoting end panel  14 ) is/are moved close to the fixed end structure  20 , as shown in  FIG. 7 . For inverse process, the pivoting joint module  46  can be lowered to switch the first structural member  48  and the second structural member  50  from the folded position to the unfolded position, and the foot structure  44  (and the pivoting end panel  14 ) is/are moved far from the fixed end structure  20 , as shown in  FIG. 6 ; the first side structure  16  and the second side structure  18  can be reset into the holders  42  to steady the travel bassinet  10  in the unfolded position. 
     Please refer to  FIG. 8  and  FIG. 9 .  FIG. 8  and  FIG. 9  respectively are diagrams of the travel bassinet  10  in different operation modes according to a second embodiment of the present invention. In the second embodiment, elements having the same numerals as ones of the above-mentioned embodiments have the same structures and functions, and a detailed description is omitted herein for simplicity. Difference between the foresaid embodiments is that the upper frame  38  in the second embodiment further includes a plurality of corner uprights  56  respectively disposed on the plurality of holders  42 , and the first side structure  16 ′ and the second side structure  18 ′ are connected with the fixed end structure  20  and the foot structure  44  via the plurality of corner uprights  56 . The first side structure  16 ′ (and the second side structure  18 ′) can include a pivot portion  58  and two bar portions  60  and  62 . Two ends of the bar portion  60  (and the bar portion  62 ) are respectively connected with the pivot portion  58  and the corresponding corner upright  56 . 
     While the first structural member  48  and the second structural member  50  stay in the unfolded position, as shown in  FIG. 8 , the bar portions  60  and  62  are parallel to steady the travel bassinet  10  in the unfolded position, and the foot structure  44  and the pivoting end panel  14  are far from the fixed end structure  20 . For switching the first structural member  48  and the second structural member  50  from the unfolded position to the folded position shown in  FIG. 9 , the pivot portion  58  is lowered to downwardly rotate the bar portions  60  and  62  relative to the corner uprights  56  and the pivot portion  58  in a non-parallel state, and the pivoting joint module  46  is lifted to upwardly rotate the first structural member  48  and the second structural member  50 , so that the foot structure  44  and the pivoting end panel  14  can be approached to the fixed end structure  20 . In the second embodiment, the bar portions  60  and  62  may be laterally rotated relative to the corner uprights  56  and the pivot portion  58  while the travel bassinet  10  is folded. 
     Please refer to  FIG. 10  and  FIG. 11 .  FIG. 10  and  FIG. 11  respectively are diagrams of the travel bassinet  10  in different operation modes according to a third embodiment of the present invention. In the third embodiment, elements having the same numerals as ones of the above-mentioned embodiments have the same structures and functions, and a detailed description is omitted herein for simplicity. Difference between the embodiments is that the travel bassinet  10  in the third embodiment has the first side structure  16 ′, the second side structure  18 ′ and the pivoting joint module  46 ′. The pivoting joint module  46 ′ can include a central pivot portion  68 , two bridging pivot portions  70  and two linking portions  72 . Each of the linking portions  72  is connected between the central pivot portion  68  and the corresponding bridging pivot portion  70 , and each of the bridging pivot portions  70  is connected between the first structural member  48  and the second structural member  50 . 
     While the travel bassinet  10  is switched from the unfolded position (shown in  FIG. 10 ) to the folded position (shown in  FIG. 11 ), the central pivot portion  68  are moved upward to lift the linking portions  72 , and the linking portions  72  are near to close the bridging pivot portions  70 , so that the first structural member  48  and the second structural member  50  can be rotated relative to the bridging pivot portions  70  and the legs  52  horizontally for approaching the fixed end structure  20  to the foot structure  44  and the pivoting end panel  14 . In the meantime, the first side structure  16 ′ and the second side structure  18 ′ are folded by rotating the pivot portion  58  relative to the bar portions  60  and  62 , which means the bar portions  60  and  62  can be rotated laterally and travel bassinet  10  can be folded conveniently. 
     For switching the travel bassinet  10  from the folded position to the unfolded position, the fixed end structure  20  is pulled away from the foot structure  44  and the pivoting end panel  14 ; the bar portions  60  and  62  are rotated from a parallel state (shown in  FIG. 11 ) to an aligned state (shown in  FIG. 10 ), and the central pivot portion  68  is lowered to allow separation of the bridging pivot portions  70 , so the first structural member  48  and the second structural member  50  can be rotated relative to the bridging pivot portions  70  and the legs  52  horizontally so as to steady the travel bassinet  10  in the unfolded position. 
     Please refer to  FIG. 12  to  FIG. 17 .  FIG. 12  to  FIG. 14  respectively are diagrams of the travel bassinet  10  in different operation modes according to a fourth embodiment of the present invention.  FIG. 15  is another view of the travel bassinet  10  shown in  FIG. 12 .  FIG. 16  is another view of the travel bassinet  10  shown in  FIG. 14 .  FIG. 17  is an enlarged diagram of a part of the first side structure  16 ″ according to the fourth embodiment of the present invention. In the fourth embodiment, elements having the same numerals as ones of the above-mentioned embodiments have the same structures and functions, and a detailed description is omitted herein for simplicity. Difference between the embodiments is that the first side structure  16 ″ in the fourth embodiment includes a first bar portion  74 , a second bar portion  76  and a joint portion  78 . The first bar portion  74  and the second bar portion  76  have substantially the same diameter and are respectively disposed on the foot structure  44  and the fixed end structure  20  via the holders  42  in the rotatable manner, and the joint portion  78  is disposed on the second bar portion  76  and detachably assembled with the first bar portion  74 . The first bar portion  74  has an end segment with the diameter smaller than other part of the first bar portion  74 , and a retractable pin  741  is disposed on the end segment of the first bar portion  74  and biased to retractably lock into a receiving hole  761  formed on an end segment of the second bar portion  76  covered by the joint portion  78 . The joint portion  78  further integrally forms a flexible button  781  aligned to the retractable pin  741  on the end segment of the first bar portion  74 , such that when the flexible button  781  is pressed, the retractable pin  741  of the first bar portion  74  is retracted from the receiving hole  761  on the end segment of the second bar portion  76  to unlock the second bar portion  76  from the first bar portion  74 . In order to provide the space to allow the joint portion  78  to engage and disengage the first bar portion  74 , the holders  42  are formed by plastic material such that the first side structure  16 ″ is able to flex when the joint portion  78  is operated. 
     The joint portion  78  may be slidably disposed on the second bar portion  76 , and a resilient component (not shown in figures) is connected between the joint portion  78  and the second bar portion  76  accordingly. A resilient recovering force of the resilient component moves the joint portion  78  in a direction opposite to the first bar portion  74 . When the flexible button  781  is pressed, the retractable pin  741  is retracted from the receiving hole  761 , and the joint portion  78  can be pulled to the right by the resilient component, so as to unlock the second bar portion  76  from the first bar portion  74 . 
     In the fourth embodiment, the first bar portion  74  and the second bar portion  76  are locked together by the retractable pin  741  of the first bar portion  74  and the receiving hole  761  of the second bar portion  76  while the travel bassinet  10  is set in the unfolded position, as shown in  FIG. 12 . For switching the travel bassinet  10  from the unfolded position to the folded position, the flexible button  781  integrally formed on the joint portion  78  is pressed to unlock the second bar portion  76  from the first bar portion  74 , and the first bar portion  74  and the second bar portion  76  can be rotated relative to the holders  42  until the bar portions  74  and  76  are parallel to the fixed end structure  20  and the foot structure  44 , as shown in  FIG. 13  and  FIG. 14 . After that, the pivoting joint module  46  can be lifted to fold the first structural member  48  and the second structural member  50 , and the fixed end structure  20  can be approached to the foot structure  44  and the pivoting end panel  14 . 
     The first bar portion  74  (and the second bar portion  76 ) may have a constraining slot  80 , and the fixed end structure  20  (which can be the foot structure  44  or the holder  42  related to the second bar portion  76 ) has a protrusion  82  slidably located inside the constraining slot  80 . The first bar portion  74  can be rotated relative to the protrusion  82  through the constraining slot  80 , and the protrusion  82  can be used to abut against ends of the constraining slot  80  to constrain rotation of the first bar portion  74 , as shown in  FIG. 15  and  FIG. 16 . 
     In conclusion, the travel bassinet has for use positions, and the lower frame and the upper frame of the travel bassinet can be adjusted according to the designated use position. The first use position is the travel bassinet can be put on the floor with the enclosed pivoting end panel; the second use position is the pivoting end panel can be removed from or unfolded relative to the travel bassinet put on the floor for the enlarged accommodating space; the third use position is the travel bassinet can be attached to the play yard frame at the low level position; and the fourth use position is travel bassinet can be attached to the play yard frame at the high level position. The lower frame and the upper frame are made by several foldable units, so the lower frame and the upper frame can be easily folded for easy transport of the travel bassinet. 
     Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.