Patent Publication Number: US-2022235804-A1

Title: Support connecting structure, support, baby crib, and crib body of baby crib

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims to the priority of Chinese Patent Application No. 2021101188107, filed on Jan. 28, 2021, the entire contents of which is incorporated herein by reference. 
     TECHNICAL FIELD 
     The present disclosure relates to a support connecting structure, a support, a baby crib, and a crib body of the baby crib. 
     BACKGROUND 
     Baby crib is a practical tool for placing babies. The conventional baby crib is generally manufactured by assembling solid woods into a fixed form. Customers buy the baby crib and place it in a fixed place at home. As the baby grows, more indoor space is required for activities of the babies. However, the conventional baby crib cannot meet requirements of folding and easy storage. Therefore, a foldable baby crib emerged. The foldable baby crib has the advantages such as easy assembly, disassembly, and storage, and therefore is favored by many customers. However, the disassembly and folding of the conventional foldable baby crib is complex and time-consuming. 
     SUMMARY 
     According to various embodiments, a support connecting structure, a support, and a baby crib and a crib body of the baby crib are provided. 
     A support connecting structure includes: a pivoting base; a pivoting arm, wherein a first end of the pivoting arm is connected to the pivoting base by a first pin shaft, and the first end of the pivoting arm comprises a first anti-rotation surface; and a locking member mounted to the pivoting base, the locking member being capable of moving in a direction parallel to an axis of the first pin shaft so as to move to a locked position or an unlocked position, and the locking member comprising a second anti-rotation surface; wherein when the locking member is at the locked position, the first anti-rotation surface abuts against the second anti-rotation surface, and when the locking member is at the unlocked position, the first anti-rotation surface is separated from the second anti-rotation surface. 
     A crib body of a baby crib includes the foregoing support connecting structure. 
     A baby crib includes the foregoing crib body of a baby crib. The baby crib further includes a crib support connected to the crib body. 
     A baby crib includes: a crib body comprising the support connecting structure according to claim  18 , wherein the crib body comprises an upper crib fence and a lower crib fence, wherein the upper crib fence and the lower crib fence each comprises a pair of first connecting rods opposite to each other and a pair of second connecting rods opposite to each other, and each first connecting rod and each second connecting rod adjacent to each other are connected by a corner connector, wherein the corner connector of the upper crib fence is connected to the corner connector of the lower crib fence by a vertical connector; each first connecting rod comprises a first rotary arm and a second rotary arm, end portions of the first rotary arm and the second rotary arm facing each other are respectively pivotally connected to hinged bases, and end portions of the first rotary arm and the second rotary arm away from each other are respectively pivotally connected to the corresponding corner connectors, so as to allow the hinged base of the upper crib fence and the corresponding hinged base of the lower crib fence to approach each other during folding of the crib body, such that the pair of second connecting rods of the upper crib fence approach each other and the pair of second connecting rods of the lower crib fence approach each other; and a crib support configured to support the crib body and detachably connected to the crib body, wherein the crib support comprises a pair of vertical supports and bases connected to the vertical supports, respectively, an upper end of each vertical support is detachably connected to the hinged base of the upper crib fence; wherein the first rotary arm and the second rotary arm of the first connecting rod of the upper crib fence serve respectively as the pivoting arms of the support connecting structure, the hinged base corresponding to the first connecting rod serves as the pivoting base of the support connecting structure, and the vertical support connected to the hinged base of the first connecting rod serves as the fixing arm. 
     A support includes: a pivoting base having a pivoted connection portion and a slideway, an extending direction of the slideway being parallel to a pivot axis of the pivoted connection portion; a locking member comprising a second anti-rotation surface, wherein the locking member is slidably mated with the slideway to move the locking member to a locked position or an unlocked position, when the locking member is moved to the locked position, the second anti-rotation surface provides a locking effect, and when the locking member is moved to the unlocked position, the locking effect of the second anti-rotation surface is released. 
     The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the invention will be apparent from the description and drawings, and from the claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       To illustrate the technical solutions according to the embodiments of the present invention or in the prior art more clearly, the accompanying drawings for describing the embodiments or the prior art are introduced briefly in the following. Apparently, the accompanying drawings in the following description are only some embodiments of the present invention, and persons of ordinary skill in the art can derive other drawings from the accompanying drawings without creative efforts. 
         FIG. 1  is a schematic front view of a support connecting structure according to an embodiment; 
         FIG. 2  is a schematic perspective view of the support connecting structure of  FIG. 1 ; 
         FIG. 3  is a schematic exploded view of the support connecting structure of  FIG. 2 ; 
         FIG. 4  is a schematic cross-sectional view of the support connecting structure of  FIG. 1 ; 
         FIG. 5  is a schematic perspective view of a crib body of a baby crib according to an embodiment, where the crib body is in a completely unfolded state; 
         FIG. 6  is a schematic perspective view of the crib body of  FIG. 5 , where the crib body is in an incompletely unfolded state; 
         FIG. 7  is a schematic perspective view of the crib body of  FIG. 1 , where the crib body is in a completely folded state; 
         FIG. 8  is a schematic perspective view of a baby crib according to an embodiment; 
         FIG. 9  is a schematic perspective view of the baby crib of  FIG. 8 , where the crib body is in a folded state, and a crib support is separated from a crib body; 
         FIG. 10  is a schematic perspective view of the crib support of  FIG. 8 ; 
         FIG. 11  is an enlarged view of a stiffening beam of  FIG. 10 ; and 
         FIG. 12  is a schematic perspective view of a baby crib according to an embodiment. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Embodiments of the invention are described more fully hereinafter with reference to the accompanying drawings. The various embodiments of the invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Elements that are identified using the same or similar reference characters refer to the same or similar elements. 
     The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. 
     It will be understood that when an element is referred to as being “connected” or “coupled” to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, if an element is referred to as being “directly connected” or “directly coupled” to another element, there are no intervening elements present. 
     Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. 
       FIG. 1  to  FIG. 4  are schematic diagrams of a support connecting structure  200  according to an embodiment. The support connecting structure  200  includes a pivoting base  21 , at least one arm  22 , and a locking member  24 . The pivoting arm  22  and the locking member  24  are mounted to the pivoting base  21 . The support connecting structure  200  is applicable to, for example, a baby carrier. The baby carrier may be, for example, a baby crib (including a baby hammock, a baby playpen, and other types of baby cribs), a baby stroller, or the like. Rods of the baby carrier provided with the support connecting structure  200  can be unfolded and folded. Therefore, the baby carrier can be switched between a use state and a folded state to satisfy different use requirements of users. 
     In some embodiments, referring to  FIG. 1  to  FIG. 3 , the support connecting structure  200  includes two pivoting arms  22 , and the pivoting base  21  includes a pivoted connection portion  21   a . First ends  221  of the two pivoting arms  22  are respectively and pivotally connected to the pivoted connection portion  21   a  by two first pin shafts  23 . An axis X-X of each first pin shaft  23  is a pivot axis of the pivoting arm  22  corresponding to the first pin shaft  23 . When the pivoting arm  22  is mounted to the pivoting base  21 , a pivot axis Y-Y of the pivoted connection portion  21   a  coincides with the axis X-X of the first pin shaft  23 . In some embodiments, the first ends  221  of the two pivoting arms  22  are mated with the same locking member  24  located between the first ends  221 . In some embodiments, a geometric structure of the pivoting base  21  may be, for example, symmetrical with respect to a median surface M-M between the two first pin shafts  23 . The median surface M-M is parallel to the axis X-X of each first pin shaft  23  and perpendicular to a line connecting centers of the two first pin shafts  23 . The first end  221  of each pivoting arm  22  includes a first anti-rotation surface  220 . In some embodiments, the first end  221  of each pivoting arm  22  is formed by a plastic member sleeved on a rod-shaped member. In some other embodiments, each pivoting arm  22  may be an integrally formed member. 
     The locking member  24  is mounted to the pivoting base  21  and is capable of moving in a direction parallel to the axis X-X of the first pin shaft  23 , therefore the locking member  24  can move to a locked position or an unlocked position. The locking member  24  includes second anti-rotation surfaces  240  that can be mated with the first anti-rotation surfaces  220  of the two pivoting arms  22 , respectively. When the locking member  24  is moved to the locked position, the first anti-rotation surface  220  of each pivoting arm  22  can abut against one of the second anti-rotation surfaces  240  of the locking member  24 , so as to prevent the pivoting arm  22  from rotating about the first pin shaft  23 , such that relative positions of the pivoting arm  22  and the pivoting base  21  can be fixed. That is to say, the locking member  24  locks the pivoting arm  22  at a predetermined pivot position. When the locking member  24  is moved to the unlocked position, the first anti-rotation surface  220  is separated from the second anti-rotation surface  240 , and the locking member  24  does not intervene in the rotation of the pivoting arm  22 . That is to say, the locking member  24  releases locking of the pivoting arm  22  at the predetermined pivot position. As such, the pivoting arm  22  can rotate about the first pin shaft  23  to an appropriate position. In some other embodiments, the support connecting structure  200  may include one pivoting arm  22  and one locking member  24 . Rotation or rest of the pivoting arm  22  relative to the pivoting base  21  is controlled by an axial moving of the locking member  24 . 
     According to the support connecting structure  200  provided in the above embodiments, by changing the axial position of the locking member  24 , the rotation of the pivoting arm  22  can be restrained or allowed. Therefore, the support connecting structure  200  having a simple structure and easily changed in state is provided. 
     Referring to  FIG. 3  and  FIG. 4 , in some embodiments, the pivoting base  21  includes a slideway  210  slidably mated with the locking member  24 . An extending direction of the slideway  210  is parallel to the axis X-X of the first pin shaft  23 . In some embodiments, the locking member  24  may be non-rotatable relative to the slideway  210 . That is to say, the rotation of the locking member  24  is limited by the slideway  210 . As such, when the first anti-rotation surface  220  abuts against the second anti-rotation surface  240 , the pivoting arm  22  does not push the locking member  24  to rotate. Many methods are available to implement an axial movement of the locking member  24  relative to the slideway  210  while avoiding the rotation of the locking member  24  relative to the slideway  210 . For example, a surface of the locking member  24  in contact with the slideway  210  can be configured to be a non-circular surface (for example, a rectangular surface, or a polygonal surface, or special-shaped surface). Alternatively, the surface of the locking member  24  in contact with the slideway  210  can be configured to be a circular surface having a radial protrusion and a radial recess. In some other embodiments, the rotation of the locking member  24  may not be limited by the slideway  210 , as long as the locking member  24  at the locked position can lock the pivoting arm  22  in a pivot position. 
     In some embodiments, the switching of the locking member  24  between the locked position and the unlocked position can be achieved by a user to push a load bearing end  24   a  of the locking member  24 , so as to move the locking member  24  in an axial direction parallel to the axis X-X of the first pin shaft  23 . In some embodiments, the support connecting structure  200  may further include an elastic restoring element  25 . The elastic restoring element  25  is configured to keep the locking member  24  at the locked position. Subjected to an external force, the locking member  24  is capable of overcoming a force of the elastic restoring element  25  and moving to the unlocked position. As such, the locking member  24  is kept at the locked position in a normal state, such that the stability of the locking member  24  at the locked position is maintained. When the locking member  24  is required to be switched to the unlocked position, only an axial force is required to be applied to the locking member  24 . The elastic restoring element  25  may be, for example, a spring sleeved on the locking member  24 . When the locking member  24  is pushed by the external force to move to the unlocked position, the spring is stretched or compressed. When the external force is removed, the spring can immediately drive the locking member  24  to automatically return to the locked position and can keep the locking member  24  at the locked position. 
     In some embodiments, an axial limiting structure configured to prevent the locking member  24  from accidentally disengaging from the slideway  210  may be further disposed on the pivoting base  21 . The axial limiting structure may be designed in any appropriate manner. Some embodiments of the axial limiting structure are described below. 
     In addition, in some embodiments, in order to reduce a possibility of unexpected axial movement of the locking member  24  at the locked position to the unlocked position as a result of accidental touch, when the locking member  24  is at the locked position, the load bearing end  24   a  of the locking member  24  and the other end  24   b  opposite to the load bearing end  24   a  do not protrude out of the slideway  210 . That is to say, the projections of the load bearing end  24   a  and the other end  24   b  onto a plane parallel to the axis X-X are within the slideway  210  and between both ends of the slideway  210 . In some embodiments, only one of the load bearing end  24   a  and the other end  24   b  does not protrude out of the slideway  210 . It is to be noted that, a situation that an end portion of the locking member  24  slightly protrudes out of the slideway  210  also falls within the protection scope of the present disclosure. In some embodiments, in order to facilitate the application of the external force to the locking member  24 , when the locking member  24  is at the locked position, the load bearing end  24   a  configured to receive the external force may protrude out of the slideway  210  (as shown in  FIG. 4 ). 
     Referring to  FIG. 1  to  FIG. 4 , in some embodiments, the first end  221  of the pivoting arm  22  includes a recessed stop  2212 , and the locking member  24  includes a protruding stop  2412   a . A surface of the recessed stop  2212  is configured to form the first anti-rotation surface  220 . A surface of the protruding stop  2412   a  is configured to form the second anti-rotation surface  240 . By moving the locking member  24  to the locked position, the recessed stop  2212  and the protruding stop  2412   a  are snapped, and the first anti-rotation surface  220  abuts against the second anti-rotation surface  240 , such that the pivoting arm  22  can be prevented from rotating. When the locking member  24  is moved to the unlocked position, the recessed stop  2212  and the protruding stop  2412   a  are staggered from each other in an axial direction, and the locking member  24  does not limit the rotating of the pivoting arm  22 . Therefore, the pivoting arm  22  can rotate about the axis X-X of the first pin shaft  23 . In other embodiments, the recessed stop  2212  on the first end of the pivoting arm  22  and the protruding stop  2412   a  on the locking member  24  may be interchanged. 
     Referring to  FIG. 3 , in some embodiments, the pivoting base  21  may further include arcuate walls  213  concentric with the first pin shafts  23 , respectively. A middle portion of the arcuate wall  213  has an overlapping portion  2131  that coincides with the slideway  210 . A notch  2132  is formed in the overlapping portion  2131 . The first end  221  of the pivoting arm  22  includes an arcuate portion  2211  slidably mated with an inner wall surface  2130  of the arcuate wall  213 , and the recessed stop  2212  is located at the middle portion of the arcuate portion  2211 . Referring to  FIG. 1  and  FIG. 3 , when the locking member  24  is at the locked position, the protruding stop  2412   a  of the locking member  24  is latched in the notch  2132 . In this case, the axial position of the locking member  24  is limited. The protruding stop  2412   a  extends into the recessed stop  2212  of the first end  221  of the pivoting arm  22  through the notch  2132  and is snapped into the recessed stop  2212 , such that the second anti-rotation surface  240  can abut against the first anti-rotation surface  220 . As such, the pivoting arm  22  is prevented from rotating in a clockwise direction F 1  and in a counterclockwise direction F 2  (as shown in  FIG. 1 ). In the above embodiments, by means of the structures such as the arcuate wall  213  and the notch  2132 , the protruding stop  2412   a  is snapped into the recessed stop  2212  through the notch  2132 . As such, not only the structural strength of the pivoting base  21  is guaranteed, but also an overall size of the support connecting structure along the axis X-X can be reduced. 
     In some embodiments, the first anti-rotation surface  220  may be an inclined surface or a bending surface, and/or the second anti-rotation surface  240  may be an inclined surface or a bending surface. The bending surface may be a right-angled bending surface, a bending surface having a plurality of bends, or any other appropriate bending surfaces, as long as the pivoting arm  22  can be prevented from rotating. It should be understood that, by designing suitable shapes for the notch  2132  and the protruding stop  2412   a , even through the rotation of the locking member is not limited by the slideway  210 , the locking member  24  at the locked position can still lock the pivot position of the pivoting arm  22 . 
     Referring to  FIG. 3 , in some embodiments, the locking member  24  may include a first slider portion  2411  and a second slider portion  2412  that are successively disposed in a sliding direction of the locking member  24  and respectively slidably mated with the slideway  210 . The first slider portion  2411  and the second slider portion  2412  can form a slider  241 . The slider  241  is, for example, an integrally formed member. The second slider portion  2412  is away from the slideway  210 , while the first slider portion  2411  faces the slideway  210 . The first slider portion  2411  has an avoiding surface  2411   a . The avoiding surface  2411   a  may be slidably mated with the overlapping portion  2131  and can move to the notch  2132 . The protruding stop  2412   a  is located on the second slider portion  2412 . Still referring to  FIG. 1 , in some embodiments, the second slider portion  2412  may have a substantially rectangular shape. Two adjacent rectangular corners of the second slider portion  2412  form the protruding stops  2412   a , which can be respectively mated with the recessed stops  2212  on the first ends of the two pivoting arms  22 . In this case, the first anti-rotation surface  220  and the second anti-rotation surface  240  may be substantially right-angled bending surfaces. 
     When the locking member  24  is subjected to the external force and overcomes the force of the elastic restoring element  25  to move to the unlocked position, the second slider portion  2412  is moved outward and drives the protruding stop  2412   a  to move out of the notch  2132 , the second anti-rotation surface  240  is separated from the first anti-rotation surface  220 , and the avoiding surface  2411   a  of the first slider portion  2411  is slid to the notch  2132  along an outer wall surface of the overlapping portion  2131  and therefore does not intervene in the rotation of the pivoting arm  22 . At this time, the pivoting arm  22  can rotate about the first pin shaft  23  to an appropriate position. In the above embodiments, when the locking member  24  is at the locked position, the locking member  24  may come into contact with the slideway  210  by a circumferential surface (including the avoiding surface  2411   a ) of the first slider portion  2411  and a partial circumferential surface of the second slider portion  2412 , such that there is a relatively large contact area between the locking member  24  and the slideway  210 . When the locking member  24  is at the unlocked position, at least the first slider portion  2411  may be maintained to be in contact with the slideway  210 . As such, not only the rotation of the pivoting arm  22  is not interfered, but also the first slider portion  2411  can guide the locking member  24  during subsequent movement to the locked position. 
     Referring to  FIG. 1 , in some embodiments, an angle limiting structure  2135  is further disposed at an edge of the arcuate wall  213 . The angle limiting structure  2135  may be in contact with the first end  221  of the pivoting arm  22  to limit extreme positions of the pivoting arm  22  during rotation in the clockwise direction F 1  and in the counterclockwise direction F 2 .  FIG. 1  illustrates the pivoting arm  22  being at one of the limit positions. In this case, the recessed stop  2212  of the pivoting arm  22  is just aligned to the protruding stop  2412   a  of the locking member  24 . Therefore, the time required by a user to align the recessed stop  2212  to the protruding stop  2412   a  can be saved, and the user can easily lock the rotation of the pivoting arm  22  by the locking member  24 . 
     Referring to  FIG. 1 , in some embodiments, when the locking member  24  is at the locked position, the two pivoting arms  22  are unfolded to be substantially on the same straight line. This corresponds to, for example, a normal use state of a baby carrier. When the locking member  24  is at the unlocked position, the two pivoting arms  22  can be pivoted about the respective first pin shafts  23 . When the two pivoting arms  22  rotate to another limit position, the two pivoting arms  22  are folded to be parallel to each other relative to the pivoting base  21 . This corresponds to, for example, a folded state of the baby carrier. 
     Still referring to  FIG. 3  and  FIG. 4 , in some embodiments, the locking member  24  may include a connecting post  242 , and a button  243  and the slider  241  are respectively disposed on both ends of the connecting post  242 . The button  243  is located at the load bearing end  24   a , and the slider  241  is located at the other end  24   b  opposite to the load bearing end  24   a . In some embodiments, the slider  241  may include the first slider portion  2411  and the second slider portion  2412 . In other embodiments, the slider  241  may have other configurations. A limiting plate  2101  is disposed in the slideway  210 . The limiting plate  2101  divides the slideway  210  into a first slideway portion  211  and a second slideway portion  212 , which are located on both sides of the limiting plate  2101 , respectively. The button  243  is slidably mated with the first slideway portion  211 , and the slider  241  is slidably mated with the second slideway portion  212 . A through hole  2102  is formed in the limiting plate  2101  allowing the connecting post  242  to extend through. The limiting plate  2101  can limit axial moving positions of the button  243  and the slider  241 , so as to prevent the locking member  24  from disengaging from the slideway  210 . That is to say, the limiting plate  2101  forms an axial limiting structure to prevent the locking member  24  from disengaging from the slideway  210 . In other embodiments, the axial limiting structure may include, for example, some steps formed at different positions of the slideway  210 . The steps can limit moving positions of the button  243  and the slider  241 , so as to prevent the locking member  24  from disengaging. 
       FIG. 4  illustrates the locking member  24  being at the locked position. The elastic restoring element  25  is a spring mounted in the first slideway portion  211  and located between the limiting plate  2101  and the button  243 . In this embodiment, when the button  243  is pressed by the external force, the locking member  24  moves leftward in a direction indicated by an arrow L in  FIG. 4  towards the unlocked position in the axial direction (substantially same as the extending direction of the slideway  210 ), and the spring is compressed. When the external force is removed, the locking member  24  moves rightward in a direction indicated by an arrow R in  FIG. 4 . The spring tends to drive the locking member  24  to move to the locked position in the axial direction. In other embodiments, the elastic restoring element  25  may include a spring mounted in the second slideway portion  212  and located between the limiting plate  2101  and the slider  241 . For example, both ends of the spring are connected to the limiting plate  2101  and the slider  241 , respectively. When the button  243  is pressed by the external force, the locking member  24  moves to the unlocked position and the spring is stretched. When the external force is removed, the spring tends to drive the locking member  24  to move to the locked position in the axial direction. 
     In some embodiments, the button  243  and the connecting post  242  may be integrally formed, for example, by injection molding. The slider  241  may be connected to the connecting post  242  by a fastener  26  (as shown in  FIG. 4 ). In some embodiments, the fastener  26  is, for example, a bolt. The bolt extends through a through hole of the slider  241  and is threadedly engaged in a center hole of the slider  241 . 
     Still referring to  FIG. 3  and  FIG. 4 , in some embodiments, the pivoting base  21  may further include a sleeve portion  214 . The sleeve portion  214 , for example, extends from the arcuate wall  213  in a direction away from the first end  221  of the pivoting arm  22 . A hook  2413  is disposed on the locking member  24 . For example, the hook  2413  is disposed on the slider  241 . The support connecting structure  200  further includes a fixing arm  27 . A first end of the fixing arm  27  has a snap opening  270 . The first end of the fixing arm  27  may be inserted into the sleeve portion  214 . When the locking member  24  is at the locked position, the hook  2413  can extend into the sleeve portion  214  through an opening  2140  of the sleeve portion  214  and can be snapped into the snap opening  270 , such that the fixing arm  27  is connected to the pivoting base  21 . When the locking member  24  is at the unlocked position, the hook  2413  can escape from the snap opening  270 , thus allowing the fixing arm  27  to be disengaged from the sleeve portion  214 . As such, locking of the pivot position of the pivoting arm  22  relative to the pivoting base  21  and the detachable connection between the fixing arm  27  and the pivoting base  21  are associated by the same locking member  24 . Therefore, the support connecting structure  200  having a simple structure and easy to fold and disassemble is provided. In some embodiments, for example, a limiting step is formed in the sleeve portion  214 . The limiting step can, for example, abut against the first end of the fixing arm  27  to limit an insertion depth of the fixing arm  27  in the sleeve portion  214 . When the hook  2413  is snapped into the snap opening  270 , the limiting step can limit the fixing arm  27  from moving in a direction out of the sleeve portion  214 . 
     In some embodiments, the hook  2413  includes a U-shaped plate  2413   a , and a pair of hook-shaped portions  2413   b  connected to the U-shaped plate  2413   a . The pair of hook-shaped portions  2413   b  can be snapped into the snap opening  270 , simultaneously. The second slider portion  2412  of the slider  241  may include a groove  2410  configured to partially accommodate the U-shaped plate  2413   a . The U-shaped plate  2413   a  may be, for example, detachably mounted in the groove  2410  by the fastener  26 . Since the hook  2413 , which is a vulnerable part, is detachably connected to the slider  241 , the user can maintain and replace the hook  2413  conveniently. In some embodiments, the slider  241  may further include a separation portion  2401  extending between both opposite sidewalls of the U-shaped plate  2413   a , thus improving the structural strength of the hook  2413 . 
       FIG. 5  to  FIG. 7  show a perspective view of a crib body  100  of a baby crib according to some embodiments. The crib body  100  employs the support connecting structure  200  according to the above embodiments. 
     The crib body  100  may include an upper crib fence  10   a  and a lower crib fence  10   b  located under the upper crib fence  10   a . The upper crib fence  10   a  and the lower crib fence  10   b  both have a substantially rectangular shape. The upper crib fence  10   a  and the lower crib fence  10   b  each includes a pair of first connecting rods  11  opposite to each other and a pair of second connecting rods  12  opposite to each other. The first connecting rod  11  and the second connecting rod  12  adjacent to each other are connected by a corner connector  13 . The corner connector  13  of the upper crib fence  10   a  is connected to the corresponding corner connector  13  of the lower crib fence  10   b  by a vertical connector  14 . In some embodiments, the corner connector  13  of corresponding corner portions of the upper crib fence  10   a  and the lower crib fence  10   b  and the vertical connector  14  may be formed as a whole. 
     In some embodiments, each first connecting rod  11  includes a first rotary arm  111  and a second rotary arm  112 . End portions of the first rotary arm  111  and the second rotary arm  112  facing each other are pivotally connected to hinged bases  151 , respectively. End portions of the first rotary arm  111  and the second rotary arm  112  facing away from each other are pivotally connected to the corresponding corner connectors  13 , respectively. As such, during folding of the crib body  100 , the hinged base  151  of the upper crib fence  10   a  approaches the corresponding hinged base  152  of the lower crib fence  10   b , such that the pair of second connecting rods  12  of the upper crib fence  10   a  approach each other and the pair of second connecting rods  12  of the lower crib fence  10   b  approach each other (see  FIG. 6 ), thereby folding the crib body  100  into a folded state (see  FIG. 7 ). 
     Referring to  FIG. 5 , each first connecting rod  11  of the upper crib fence  10   a  has the structure of the support connecting structure  200  in the above embodiments. That is to say, the first rotary arm  111  and the second rotary arm  112  of each first connecting rod  11  serve as the pivoting arms  22  of the support connecting structure  200 , and the hinged base  151  corresponding to each first connecting rod  11  of the upper crib fence  10   a  serves as the pivoting base  21  of the support connecting structure  200 . The hinged base  152  corresponding to each first connecting rod  11  of the lower crib fence  10   b  is a groove-shaped member having an open top. Both ends of the groove-shaped member are provided with lugs  1521  configured to be pivotally connected to the corresponding first rotary arm  111  and second rotary arm  112 . 
     It should be understood that, in other embodiments, each first connecting rod  11  of the lower crib fence  10   b  may have the structure of the above support connecting structure  200 . In addition, in other embodiments, one of the first connecting rods  11  of the upper crib fence  10   a  may have the structure of the above support connecting structure  200 , and the other of the first connecting rods  11  of the upper crib fence  10   a  does not have the structure of the above support connecting structure  200 , as long as the first rotary arm  111  and the second rotary arm  112  of the other of the first connecting rods  11  can be pivoted relative to the corresponding hinged base  151  in any appropriate form without affecting the overall folding effect of the crib body  100 . 
     It should be understood that, in other embodiments, each second connecting rod  12  of the upper crib fence  10   a  and the lower crib fence  10   b  may be folded. For example, at least part of the second connecting rod  12  may have the structure of the above support connecting structure  200 . 
     It is to be noted that, according to each first connecting rod  11  and each second connecting rod  12  having the structure of the above support connecting structure  200 , the hinged base serving as the pivoting base  21  of the support connecting structure  200  may be provided with the sleeve portion  214  and the hook  2413  according to requirements, or may not be provided with the sleeve portion  214  or the hook  2413  according to requirements. 
     In some embodiments, referring to  FIG. 7 , when the crib body  100  is folded, the hinged base  152  of the first connecting rod  11  of the lower crib fence  10   b  is located on an inner side of the corresponding hinged base  151  of the upper crib fence  10   a . By overlapping the hinged base  152  and the hinged base  151 , the overall height of the crib body  100  after folding is reduced. 
       FIG. 8  to  FIG. 12  show a perspective view of a baby crib according to an embodiment. The baby crib may include the crib body  100  according to the above embodiments. The baby crib further includes a crib support  300  configured to support the crib body  100 . 
     In some embodiments, the crib support  300  is detachably connected to the crib body  100  to facilitate the storage of the baby crib (see  FIG. 9 ). The crib support  300  may include a pair of vertical supports  31  and bases  32  connected to the vertical supports  31  respectively. An upper end of each vertical support  31  is detachably connected to the hinged base  151  of the first connecting rod  11  of the upper crib fence  10   a . In some embodiments, the first connecting rod  11  uses the structure of the support connecting structure  200  in the above embodiments. The hinged base  151  of the first connecting rod  11  serves as the pivoting base  21  provided with the sleeve portion  214  and the hook  2413 . Each vertical support  31  serves as the fixing arm  27 . An opening  310  (see  FIG. 10 ) is provided in an upper end of each vertical support  31 . The opening  310  serves as the snap opening  270  for the hook  2413  to be snapped in. It may be understood that, by switching the locking member  24  of the support connecting structure  200  between the locked position and the unlocked position, the vertical support  31  can be easily fixed to the hinged base  151  or disassembled from the hinged base  151 . 
     In some embodiments, a height of each vertical support  31  is adjustable, so as to adjust a height of the crib body  100 . A wheel  33  facilitating movement of the baby crib may be disposed on each base  32 . The wheel  33  may be provided with an anti-rotation lock to prevent unexpected rolling of the wheel  33 . The crib body  100  may be surrounded by a ruffle  400  (see  FIG. 12 ). The ruffle  400  is, for example, made of fabric to define a space for accommodating a baby. A cushion may be further provided in the ruffle  400 . 
     In some embodiments, the crib support  300  may further include a stiffening beam  34  located under the crib body  100 . Both ends of the stiffening beam  34  are detachably connected to the pair of vertical supports  31 , respectively. As such, not only the structural stability of the crib support  300  is improved, but also the crib support  300  can be conveniently assembled and disassembled. Referring to  FIG. 10  and  FIG. 11 , in some embodiments, a slot  340  is provided in the end of the stiffening beam  34 . The slot  340  has an opening at a bottom thereof, and the vertical support  31  is provided with a boss  312  that can be snapped into the boss  312  from the opening. The boss  312  may be a pin shaft mounted to the vertical support  31 , or may be a bolt mounted to the vertical support  31 . 
     Referring to  FIG. 8 , when the crib support  300  supports the crib body  100 , the hinged base  152  of the lower crib fence  10   b  is located on an inner side of the pair of vertical supports  31 . That is to say, each first connecting rod  11  of the lower crib fence  10   b  is recessed inward relative to the vertical support  31 . During folding of the crib body  100 , the vertical support  31  may be disassembled from the crib body  100  or the upper end of the vertical support  31  is maintained to be in contact with the corresponding hinged base  151 , the hinged base  152  of each first connecting rod  11  of the lower crib fence  10   b  may move upward and is finally located on the inner side of the hinged base  151  of each first connecting rod  11  of the upper crib fence  10   a . As such, the overall longitudinal height of the crib body  100  after folding is reduced. 
     It is to be noted that, the crib body  100  may be provided with other structures according to requirements. In addition, although the crib body  100  shown in the  FIG. 8  is similar to a baby hammock having a relatively small longitudinal depth, it should be understood that, the crib body  100  provided in the embodiments is not limited to the baby hammock, and may also be, for example, a baby playpen. 
     In addition, although the support connecting structure  200  is applicable to the baby crib according to the aforementioned embodiments, it should be understood that, the support connecting structure  200  may further be applicable to other baby carriers such as a baby stroller, such that rod members on the baby carriers can be conveniently unfolded and folded. As mentioned above, the support connecting structure  200  is further applicable to other fields in addition to the baby carriers. 
     In addition, a support according to an embodiment is provided. The support includes the above pivoting base  21  and the locking member  24 . The support is configured to mount the above pivoting arm  22 . The support is applicable to any suitable field, including, but not limited to, baby carriers. 
     Although the respective embodiments have been described one by one, it shall be appreciated that the respective embodiments will not be isolated. Those skilled in the art can apparently appreciate upon reading the disclosure of this application that the respective technical features involved in the respective embodiments can be combined arbitrarily between the respective embodiments as long as they have no collision with each other. Of course, the respective technical features mentioned in the same embodiment can also be combined arbitrarily as long as they have no collision with each other. 
     The foregoing descriptions are merely specific embodiments of the present invention, but are not intended to limit the protection scope of the present invention. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in the present invention shall all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.