Abstract: A server case includes a case, a drawer body, and a adjustable device. The drawer body is received in the case. The adjustable device includes a first end, a second end, and a adjustable structure. The second end is connected to the drawer body, the adjustable structure is connected to the first end and the second end, and a distance between the first end and the second end is changeable. The drawer body received in the case is moved until at least a part of the drawer body is located outside the case, to change the distance between the first end and the second end.

Abstract: A frame is configured to rest on a support surface and an infant-receiving receptacle is supported above the support surface by the frame. The infant-receiving receptacle includes a bottom/floor panel forming a bed for the child to sleep upon and a peripheral sidewall surrounding the bottom panel and extending between the bottom panel and the frame. The bassinet includes a depth-adjustment mechanism that enables a caregiver to selectively adjust the depth of the infant-receiving receptacle by raising or lowering the bottom panel of the infant-receiving receptacle. Various embodiments can also include wheels, rollers, or other mechanisms for rolling, sliding, or gliding the bassinet across the support surface. Some embodiments include a height-adjustment mechanism, downward-recessed front wall, longitudinal-axis folding canopy, inverted-eggcrate bed pad, and/or base-positioned footrest.

Abstract: A child play enclosure frame, comprising: a plurality of vertical rods respectively provided with upper frame corner joints and lower frame corner joints, an upper frame. When the child play enclosure frame is in the unfolded position, the lower frame structure is stable. When the upper center set performs an upward relative motion relative to the lower center set, the triangular mechanism and the four-linkage mechanism deform simultaneously, which may force the plurality of vertical rods to remain upright or remain in a state of being approximately upright and synchronously drawing together towards the center, which forces the entire play enclosure frame to fold and collapse.

Abstract: A child crib includes a frame body, a corner component, a cloth component and a covering member. The cloth component at least partially covers the frame body. The corner component is connected to a handrail and a post of the frame body and exposed out of the cloth component. A first ring-shaped opening structure and a second ring-shaped opening structure are respectively formed by a first side and a second side of a covering body of the covering member. When the first side of the covering body is connected to a first side of the cloth component, by positioning the second side of the covering body on a second side of the cloth component, the first side and the second side of the cloth component are respectively enclosed by the first ring-shaped opening structure and the second ring-shaped opening structure, and the covering member covers the corner component.

Abstract: A portable crib including a full-size crib mattress having an upper and a lower surface and a frame configured to be covered by the fabric cover to define crib sidewalls. The frame includes a collapsible top assembly including top rails, a collapsible bottom assembly including support rails to support the crib mattress, and a perimeter frame at least partially surrounded by the fabric cover to define at least a portion of the crib sidewall to surround the crib mattress and disposed between the upper and lower surfaces of the crib mattress at a predefined horizontal distance between an outer perimeter of the crib mattress and the perimeter frame.

Abstract: A collapsible containment berm having a floor and a peripheral sidewall, a plurality of brace assemblies integrally carried on an external surface of the sidewall and on an adjacent underside surface of the floor, each brace assembly comprising a rigid sidewall support member connected to the external surface of the sidewall and oriented upright when deployed, a rigid buttress member having a first end and an opposite second end, and hingedly connected to an upper end of the sidewall support member that allows the buttress member to arc toward or away from the sidewall, a rigid floor member hingedly connected at the third end to the other end of the buttress member, and a sleeve connected to the underside of the floor and adapted to receive the floor member. The floor member slides in and out of the sleeve and moves the buttress member in and out of a bracing position with respect to the sidewall.

Abstract: A bench seat cover assembly includes a slip cover that has a seat portion forming an angle with a backrest portion thereby facilitating the slip cover to be positioned over a bench seat in a vehicle. A pair of elastomeric belts is each coupled to the seat portion of the clip cover and a pair of securing belts is each coupled to the seat portion of the clip cover. Each of the securing belts is releasably matable to a respective one of the elastomeric belts for securing the set portion on the seat of the bench seat. A pair of floor flaps each extends away from the seat portion of the slip cover thereby facilitating each of the floor flaps to lie on a floor of the vehicle when the slip cover is positioned over the bench seat.

Abstract: A polygonal one-piece foldable water basin, comprising a water basin body, wherein the water basin body is connected with at least one water outlet, a supporting frame is provided at an inner side of the water outlet close to an edge thereof, a tarpaulin is provided in an outer side of the water basin body; the tarpaulin comprises a mesh and a base cloth; the base cloth is made of high strength terylene and/or chinlon, coated with PVC paste at both sides thereof and dried; the mesh is a high strength square mesh, and the mesh is connected and welded to the base cloth by high temperature processes to form the tarpaulin; by providing the tarpaulin at an outer portion of the water basin the water basin is reinforced, the tarpaulin is provided with the high strength square mesh, the mesh is inelastic and enclosed in the tarpaulin.

Abstract: A foldable bath tub includes a base, a rim, and a basin wall disposed between and interconnecting the base and the rim. The bottom wall has an upwardly extending crotch support. The basin wall includes at least one crease. The basin wall is configured to be positioned in one of a folded condition in which the basin wall is folded into itself at the at least one crease an extended condition in which the basin wall is configured to receive an associated child. Where in the extended condition of the basin wall a distance from the base to the at least one crease increases along a length direction of the bath tub from a first end of the bath tub to a second end of the bath tub.

Abstract: A baby hammock is provided including: a crib support; a first peripheral crib fence mounted to the crib support and having an opening at a bottom thereof; and a hammock portion, where a periphery of the hammock portion is detachably connected to the first peripheral crib fence by at least one first zipper, and the hammock portion covers the opening of the first peripheral crib fence. A baby crib including the above baby hammock is also provided.

Abstract: A pluggable state-of-charge (SOC) indicator and methods of use are disclosed. The pluggable SOC indicator includes at least one voltage input jack for connecting to a battery, at least one instance of control electronics, and at least one SOC indicator, such as a 5-bar liquid crystal display (LCD). Embodiments of the pluggable SOC indicator include, but are not limited to, a pluggable single-connector SOC indicator, a pluggable dual-connector SOC indicator, a pluggable tri-connector SOC indicator, and a pluggable quad-connector SOC indicator. Further, the control electronics are programmable for any input voltage range and/or battery discharge characteristics.

Abstract: The disclosed technology includes a device for extending the turndown ratio of a gas-fired burner system. The device can comprise a variable area device configured reduce the amount of fuel and air passed to the burner during low output conditions by adjusting the cross-sectional area of the passage between the blower and the burner. The variable area device can be controlled by an actuator that adjusts the position of the variable area device. The actuator can be manually controlled, mechanically controlled, or electronically controlled.

Abstract: A foldable playard includes a plurality of vertical tubes, a plurality of X-typed frames and a latching mechanism. Each vertical tube includes a bar member, a corner and a slider. The corner is affixed to top of the bar member. The slider is movably disposed on the bar member. Each of the X-typed frames is rotatably connected between two adjacent vertical tubes via the corner and the slider. The latching mechanism includes a latch body and a locking portion. The latch body includes a first end and a second end opposite to each other, and the first end being disposed on the corner of one vertical tube. The locking portion is disposed on the second end. The locking portion is adapted to engage with and disengage from one X-typed frame rotatably connected to the slider on the said vertical tube in response to motion of the latch body.

Abstract: The present invention relates to a collapsible clothes rack. The rack includes a lateral center bar with ends distal to each other, each end being attached to a center hinge assembly. A pair of foldable wing assemblies are attached to the center hinge assemblies and extend transversal to the lateral center bar. A pair of collapsible main leg assemblies are each attached to the center hinge assemblies, and wherein the center hinge assemblies are configured to pivot the main leg assemblies to a predetermined angle from each other to define a base on a surface. Finally, a leg support assembly secured between the pair of collapsible main leg assemblies, and wherein the leg support assembly includes leg support hinges configured to permit the pair of collapsible main leg assembles to pivot away from each other at the predetermined angle.

Abstract: A bassinet includes a frame unit, two legs pivotally connected to the frame unit, a bottom plate disposed between the legs, and a lower limiting mechanism disposed on at least one of the legs. The bottom plate is detachably connected to the legs via the lower limiting mechanism. Another bassinet includes the frame unit, four of the legs pivotally connected to the frame unit and disposed angularly spaced apart from each other, an upper limiting mechanism disposed on at least one of the frame unit and the legs for limiting pivotal movement of the legs away from each other, and the bottom plate detachably connected to the legs to exert forces pushing the legs away from each other.

Abstract: A child play yard includes a frame that includes legs, lower cross bars having first ends pivotally coupled to lower ends of the legs, and a hub pivotally coupled to second ends of the lower cross bars, the hub including a hub mechanical central tube, a column slidably disposed within the hub mechanical central tube, a hub mechanical spindle disposed within the column, and hub lock fingers pivotally coupled to a lower portion of the column and including lower feet portions, the hub mechanical spindle having an enlarged diameter lower end portion that engages lower inner sidewalls of the hub lock fingers and maintains the lower feet portions of the hub lock fingers outside a perimeter of a lower opening of the hub mechanical central tube when the hub is disposed in a lowermost position in the frame.

Abstract: A service table for transporting a battery pack comprises four frame members arranged end-to-end in a circuit, four hinges between adjacent frame members, and wheels. The service table further comprises a support bed mounted to at least one of the frame members and configured to support the battery pack. At least one hinge lock is disposed between adjacent frame members and arranged to be rigidly fixed to both of the adjacent frame members in a locked configuration and arranged to be decoupled from at least one of the adjacent frame members in an unlocked configuration. The frame members are arranged in a service configuration having a first width when the hinge lock is arranged in the locked configuration for transporting the battery pack thereon and in a storage configuration having a second width, less than the first width, when the hinge lock is arranged in the unlocked configuration.

Abstract: An emergency vision device includes an enclosed housing having a first end and a second end; first and second clear members disposed at the first and second ends, respectively; the housing including a plurality of wall panels joined side-to-side, the wall panels being foldable; and a loop of spring wire is operably associated with each of at least two of the wall panels.

Abstract: A playpen frame for an easy-to-install enclosure includes four support assemblies, two long handrail tubes, two short handrail tubes and a bottom frame. The four support assemblies are distributed at four corners, and each of the support assemblies includes a support base, a support post, a slat and a pivoting piece. A height of the support post is identical to a height of the slat. The slat is located outside the support post, and a gap is arranged between the support post and the slat. The support post and the slat are arranged between the support base and the pivoting piece. The two long handrail tubes are arranged opposite to each other, and the two short handrail tubes are arranged opposite to each other. The long handrail tube or the short handrail tube is arranged between two adjacent pivoting pieces of the four support assemblies.

Abstract: A frame is configured to rest on a support surface and an infant-receiving receptacle is supported above the support surface by the frame. The infant-receiving receptacle includes a bottom/floor panel forming a bed for the child to sleep upon and a peripheral sidewall surrounding the bottom panel and extending between the bottom panel and the frame. The bassinet includes a depth-adjustment mechanism that enables a caregiver to selectively adjust the depth of the infant-receiving receptacle by raising or lowering the bottom panel of the infant-receiving receptacle. Various embodiments can also include wheels, rollers, or other mechanisms for rolling, sliding, or gliding the bassinet across the support surface. Some embodiments include a height-adjustment mechanism, downward-recessed front wall, longitudinal-axis folding canopy, inverted-eggcrate bed pad, and/or base-positioned foot rest.

Abstract: A depth-adjustable fabric liner for removable attachment to a structural support fame for use as a child containment device. In example forms, the depth-adjustable fabric liner provides for adjustability to the depth of the floor or bottom of the liner such that the bottom or floor portion of the liner is adjustable between at least two different heights. In example forms, the depth-adjustable fabric liner is adjustable relative to the structural support frame between a first floor position, a second floor position, and a third floor position such that the child containment device is generally convertible between a play yard configuration, a sleeper/bassinet configuration, and a diaper changing station configuration. In some example forms, the liner is substantially elastic and stretchable.

Abstract: A child support device includes a seat and a panel included in or adjacent to the seat. The panel includes a first panel portion including a panel edge defining a panel opening. The first panel portion has a first heat transfer coefficient. A location of the panel opening corresponds to a heat transfer region in which an expected heat received from a child in the seat is greater than a heat reception threshold. A second panel portion is in the panel opening and attached to the panel edge. The second panel portion includes a layered mesh having a second heat transfer coefficient greater than the first heat transfer coefficient and greater than a threshold heat transfer coefficient at which a temperature of the second panel portion while receiving the expected heat is greater than a room temperature by less than a threshold difference, wherein the threshold difference is at most five degrees Fahrenheit.

Abstract: A support surface assembly comprising four corner elements; at least four elongated rigid frame sections; a first air permeable layer suspended between the at least four elongated rigid frame sections; and a second air permeable layer suspended between the at least four elongated rigid frame sections; wherein the four corner elements include at least one lock element, the lock element having a first position that engages at least one elongated frame section and prevents relative movement between the four elongated rigid frame sections; the lock element having a second position that permits relative movement between the four elongated rigid frame sections.

Abstract: An infant care apparatus includes a standing frame, and an infant resting support connected with the support frame and having a plurality of bearing surfaces. The infant resting support is rotatable relative to the standing frame to position any of the bearing surfaces facing upward for receiving a child thereon, and the infant resting support is further slidable vertically relative to the standing frame to adjust a height of the infant resting support.

Abstract: System and method directed to the art of pet kennels, more particularly collapsible pet kennels, are provided. A collapsible pet kennel having a first framework and a second framework both rotatably attached to a base framework, a first swing arm pivotably attached to the first framework and removably engageable with the second framework, a second swing arm pivotably attached to the second framework and removably engageable with the first framework, and a covering which encloses the pet kennel. The pet kennel is capable of being collapsed without removing the covering.

Abstract: The invention provides a portable baby supporting device designed to be used anywhere for taking care of a baby and can be easily moved and stored to anywhere. The portable baby supporting device includes a base and a platform rotatably coupled to the base. The platform can either be stowed to be in parallel with the base or opened to be perpendicular to the base. When opened to a use status, the platform provides a first supporting surface for diaper changing, food feeding, or entertaining, etc. Necessary supplies can be stored in the compartments of the base in hand. The portable baby supporting device may also be collapsed to a minimized size for storage purpose, or oriented upside down, so that a higher changing table provided by the platform is accessible.

Abstract: A play yard system for infants or small children. They play yard includes a frame, and the system includes at least one child support unit for mounting to the frame of the play yard. The at least one child support unit may take the form of a bassinet and/or a changing table. The play yard frame may be collapsible for storage and transport, and the child support unit may be removable from the play yard frame.

Abstract: Play yards and methods of operating the same are disclosed. An example play yard includes a plurality of posts, a lower frame supported by the plurality of posts, and a top frame supported by the plurality of posts when the play yard is in an erected position. The top frame includes a first rounded rail; a second rounded rail opposite the first rounded rail; a third rounded rounded rail between the first rounded rail and the second rounded rail; and a fourth rounded rail opposite the third rounded rail. In the erected position, the third rail curves upward and a center of the third rail is at a first height and a center of the first rail is a second height. The second height is closer to the lower frame than the first height.

Abstract: A portable playpen which can be erected, collapsed and carried while holding a baby, includes a framework supporting an enclosure for a child. The framework has a generally pyramidal structure when it is erected.

Abstract: The invention relates to a child bed assembly (1) comprising an infant bed frame assembly (10); an inlay (40) for an infant bed; and a toddler bed frame (82). The infant bed frame assembly (10) comprises an upper frame section (12), a base frame portion (14) and at least one connecting member (16) connecting said base frame portion (14) to said upper frame section (12). The upper frame section (12) comprises a first sidebar (18), a second sidebar (20) spaced apart from the first sidebar (18), and a first crossbar (22) coupled to the first and second sidebars (18, 20) proximate a first end of each of said first and second sidebars (18, 20). The upper frame section (12) is pivotally coupled to the at least one connecting member (16) such that the first crossbar (22) is movable between a first position wherein the first crossbar (22) is at a first distance from the base frame portion (14) and a second position wherein the first crossbar (22) is at a second distance from the base frame portion (14).

Abstract: A playard having a floor and an upper frame is disclosed. The upper frame includes a first end supported a first distance above the floor, a second end supported a second distance above the floor, and at least two opposed sides. Each of the opposed sides includes a first rail, a second rail, and a joint joining the first and second rails. The joint is positioned in a first plane when the joint secures the first and second rails in an erected position, the first plane being transversely oriented with respect to the floor.

Abstract: A reversible platform and a crib therewith are disclosed. The reversible platform includes a pivotally-engaging mechanism and a bracket. The pivotally-engaging mechanism is disposed on a crib frame. The bracket is connected to the crib frame through the pivotally-engaging mechanism. The bracket has a first side and a second side opposite to the first side. The bracket is capable of being rotated to be disposed selectively with the first side or the second side facing upward for providing application space. Thereby, the invention can provide two application platforms with one occupied space of the crib frame, so as to solve the issue in the prior art that additional accessories provided for a conventional crib is provided for multiple functions occupy more space and the operation therefor is usually inconvenient to users.

Abstract: A playyard includes a collapsible frame having a rail support adapted to support a playyard floor and a playyard top rail. The playyard top rail includes a left rail segment and a right rail segment. The left rail segment and the right rail segment move relative to one another from an inline use position to a folded-storage position when the playyard is collapsed for storage or transportation.

Abstract: An infant playpen includes a plurality of upright legs, and a first and a second upper side rail assembly supported by the upright legs. Each of the first and a second upper side rail assembly includes at least one elongated segment having an outer surface, and a plurality of positioning regions are defined on the outer surfaces of the elongated segments, each of the positioning regions being configured to locate a connection of a removable accessory on the infant playpen. An infant care system is also disclosed, which includes the infant playpen and a removable accessory installed thereon. One selected positioning region of the first upper side rail assembly can be received in a housing of the removable accessory, and a locking part of the removable accessory is displaced to a locked position that retains the selected positioning region in the housing.

Abstract: A cover is provided that is adapted to wrap around at least a portion of a child container such as a crib or play yard. The cover includes at least one fabric sheet having a surface area sufficient to cover substantially all of a top face of a mattress in the child container. The sheet includes at least one mattress fastener such as a sleeve or band that is operative to mount the sheet to the mattress. The cover also includes at least one panel connected to the sheet which wraps inner faces of the walls of the child container, which extends over the upper edges of the walls, and which extends over adjacent portions of the outer faces of the walls. The at least one panel includes at least one fastener component that is usable to fasten the cover adjacent the outer faces is of the child container.

Abstract: A travel cot includes a frame unit, and two articulation units. The frame unit includes four corner blocks, four support legs, four elastic plates, two first connecting bars, and four second connecting bars. Each of the articulation units includes a positioning plate, a clamping plate, a movable plate, at least one positioning ball, at least one compression spring, a pivot shaft, and a hooked piece. Thus, the hooked piece of each of the articulation units is hooked on the clamping plate and the movable plate to limit the bending direction of the second connecting bars, so that the second connecting bars can only be pivoted upward and cannot be pivoted downward by limit of the hooked piece to prevent the second connecting bars from being bent downward and injuring the infant or baby.

Abstract: A child holding accessory can be desirably installed on the play yard for use, and has two regions on opposite sides adapted to receive a child in different configurations of use. Examples of construction for these holding regions can include, without limitation, a changing table and a child sleeping bed. The child holding accessory can include a support board, and a cushion element mounted with the support board. The support board is configured to deform differently depending on whether the child is placed on the first or second region, so that the bearing surfaces associated with the holding regions can have different firmness to provide adequate resting of the child.

Abstract: A child containment system has a child containment structure with a bottom, a top rail, and a surrounding side wall that can be arranged to extend between the bottom and the top rail. An infant sleeping apparatus has a fabric bed and a frame. A connector arrangement includes at least one connector carried on a portion of the child containment system and at least one connector part carried on the infant sleeping apparatus. The infant sleeping apparatus is removably mountable to the child containment structure with the fabric bed above the bottom and with the connector part coupled to the connector at a position that is below the top rail.

Abstract: An infant crib with tensioned netting. A frame having corner posts connected by upper and lower rails, is provided. A support arm has a first portion connected to each corner post, and second portion extending inwardly. A mattress support frame is supported by each second portion. A mattress overlies the mattress support frame. A bed skirt has an upper edge engaged by respective skirt rods that engage respective skirt rod receivers on the upper end of the support arms. A plurality of rod hooks is mounted on the inside wall of the lower rail. Netting extends between and around the corner posts and the rails. The upper ends of the netting roll over the upper rail and engage a respective upper rod, extending between adjacent posts. The lower ends of the netting engage a respective lower rod, secured within the rod hooks. Resilient and foraminous crib sidewalls are thereby defined.

Abstract: A foldable structure includes: an upper assembly forming an upper portion of the structure; a base assembly forming a lower portion of the structure; a centrally-located hub assembly operatively connected to the base assembly; and a post extending from each corner of the upper assembly to a corner of the base assembly. The upper assembly includes a plurality of arm assemblies. At least one latching mechanism is provided at each corner of the upper assembly extending from an upper portion of at least one of the posts to a portion of at least one of the arm assemblies.

Abstract: A child containment system has a child containment structure with a bottom and a perimeter wall surrounding the bottom. A connector part is on each of two opposed outward facing surfaces of the perimeter wall. The system has a bassinet with a bottom panel and surrounding wall around the bottom panel. The bassinet is removably mounted to the perimeter wall with the bottom panel elevated above the bottom. The system has an infant sleeping apparatus with a fabric panel, a top surface, a pair of opposed sides, and a pair of opposed ends. The infant sleeping apparatus has a connector part positioned near each of the pair of the opposed ends. The infant sleeping apparatus is removably mounted to the containment structure with the fabric panel overlying the bassinet bottom panel with each connector part of the sleeping apparatus coupled to one of the connector parts of the containment structure.

Abstract: Seat inserts and methods of manufacturing seat inserts are disclosed. An example seat insert includes a frame. A first base panel is coupled to the frame, and a second base panel is coupled to the frame. The second base panel is joined to the first base panel. The first base panel is positioned at a first incline and the second base panel is positioned at a second incline to provide an inclined support for a child. A relative length of at least one of the first base panel or the second base panel is adjustable to adjust angles of inclination of the first base panel and the second base panel.

Abstract: A child containment device including a frame having at least one upper frame member, and a liner for removable attachment to the frame. The liner includes at least one wall portion for placement inside of the frame, a flap portion for extending over at least a portion of the upper frame member and outside of the frame, and a fastener securable on an exterior surface of the at least one wall portion of the liner.

Abstract: The invention provides an enclosed play space with outward support that keeps infants nestled safely while being entertained. The structure is an oval structure having a cushioned floor, wherein the wall and floor are attached with spaced apart hook and loop closures. The wall incorporates spaced apart flexible plastic rods encased between two thick material or fabric layers. The external surface comprises storage compartments which can be attached by hook and loop fasteners. The interior walls of the Baby Safe contain an assortment of entertaining items for an infant.

Abstract: The adjustable mechanism for changing floor height of a play yard according to the present invention comprises at least a foldable frame, a first bed floor, a flexible envelope and an adjustable mechanism. The foldable frame has an upper border portion and a base support assembly. The first bed floor is connected to the base support assembly. The flexible envelope has a second bed floor and a shading periphery connected with the second bed floor, the shading periphery is folded to form an indigitation length exposed outside the foldable frame thereby adjustably hanging on the upper border portion. The adjustable mechanism is operatively mounted on the foldable frame and connected with the lower end of the indigitation length for adjusting the second bed floor relative to the first bed floor in distance and height.

Abstract: A foldable structure includes: an upper assembly forming an upper portion of the structure; a base assembly forming a lower portion of the structure; a centrally-located hub assembly operatively connected to the base assembly; and a post extending from each corner of the upper assembly to a corner of the base assembly. The upper assembly includes a plurality of arm assemblies. At least one latching mechanism is provided at each corner of the upper assembly extending from an upper portion of at least one of the posts to a portion of at least one of the arm assemblies.

Abstract: A playard includes standing posts. The standing posts are substantially arranged in parallel, and a gap is formed between two adjacent standing posts. The playard further includes a pillar disposed between the two adjacent standing posts, and a width of the pillar is larger than the gap formed between the two adjacent standing posts. The playard further includes an enclosure connected to the pillar. Two ends of the enclosure are pulled along directions away from the two adjacent standing posts respectively so that the pillar is abutted on the two adjacent standing posts.

Abstract: A collapsible playpen system featuring a base panel and side panels that form an enclosure for a mattress. Bottom bars, side bars, and top bars separate the base panel and side panels. The bars each feature a center hinge joint allowing for the bars to move between an extended position and a collapsed position for storage purposes. The system also features a carrying case for housing the playpen when not in use.

Abstract: A sleeper for infants is described. The sleeper has four short legs, a frame supported by the legs and a bassinette hanging from the frame. The sleeper can rest on its legs for use in a stand-alone state, or be mounted on a playard for use as a bedside sleeper. When mounted on a playard, the sleeping surface of the sleeper has approximately the same height as an adult's bed.

Abstract: A linking device is configured at the bottom of a playpen. Two of the bottom pipes at opposite side pivot to a base seat and further pivot to the linking device, which is engaged by a locking device so that the bottom pipes and the linking device are secured at an unfolding position. To fold the hub assembly, using a strap or by pushing the locking device directly pivots the locking device to disengage from the linking device and the bottom pipes may rotate to a folding position. To restore the hub assembly to the unfolding position, the linking device can be pressed to push an inclined surface of the locking device to impart a force to the locking device to pivot the locking device until the linking device snaps to engage the locking device, so the hub assembly is secured at the unfolding position again.