An inner support panel includes a first partial panel, a second partial panel, a first layer, a second layer a first panel portion, a second panel portion, a first layer, a second layer, and at least one support structure. The first layer is stacked on the second layer. The first partial panel includes one or two combinations consisting of at least part of the first layer and at least part of the second layer. The second partial panel includes one or two combinations consisting of at least the other part of the first layer and at least the other part of the second layer. The first partial panel and the second partial panel are connected to each other and form a hollow structure by defining a cavity. At least part of the second partial panel extends towards the cavity to form the support structure. The first partial panel can be supported by the support structure.

A hollow fusion panel and usage. The hollow fusion panel comprises a first layer, a second layer, a first partial panel and a second partial panel; the first partial panel and the second partial panel form an integrally formed structure in an enclosed manner, the first layer overlaps with at least part of the second layer, multiple portions of the second partial panel are all recessed towards a direction of the first partial panel to form a predetermined number of support structures which are a distributed in a preset manner, each of the support structures forms a recessed cavity, the support structures and at least part of the first partial panel are fused and the occupied area of the first partial panel fused by a single support structure is s, and the thickness of the portion where the first partial panel is provided opposite the second partial panel is t, s/t2 being greater than 01.

A lifting table including a platform having a polygonal contour and including an upper and a lower face, a lifting mechanism and a base. The lifting mechanism connected to the table top and including an actuator for raising and lowering the table top. The base configured for supporting the lifting mechanism. Two side members positioned along two adjoining sides of the table top and a switch element positioned below the upper face, wherein the side members are connected to the table top below the upper face allowing the side members to be moved between a first position, wherein the frame members are disengaged from the switch element and a second position where the side members activate the switch element, hereby preventing displacement of the table top relative to the base. Ends of the side members are arranged with a distance in between each other.

A closed cell foam sleeping pad has a foldable configuration and can be folded accordion style. The sleeping pad's top and bottom surfaces have a plurality of protrusions and a plurality of indentations, wherein the protrusions and indentations are arranged at different locations on different but adjacent foldable sections of the sleeping pad body such that when the pad is folded accordion style, the protrusions nest into the indentations perfectly to give the sleeping pad a smaller packing density while at the same time providing the protrusions for added user comfort.

A blow-molded plastic structure, such as a tabletop, may include an undercut. For example, the tabletop may include a frame receiving portion and a frame connecting structure with an undercut may be disposed in the frame receiving portion. A portion of the frame may contact or engage the frame connecting structure, such as the undercut, when the frame is connected to the tabletop. In an exemplary embodiment, a first side of the frame receiving portion may include a first frame connecting portion with an undercut and a second side of the frame receiving portion may include a second frame connecting portion with an undercut. The first frame connecting portion with an undercut may be disposed on an opposing surface from the second frame connecting portion with an undercut.

A blow-molded plastic structure, such as a tabletop, may include an undercut. For example, the tabletop may include a frame receiving portion and a frame connecting structure with an undercut may be disposed in the frame receiving portion. A portion of the frame may contact or engage the frame connecting structure, such as the undercut, when the frame is connected to the tabletop. In an exemplary embodiment, a first side of the frame receiving portion may include a first frame connecting portion with an undercut and a second side of the frame receiving portion may include a second frame connecting portion with an undercut. The first frame connecting portion with an undercut may be disposed on an opposing surface from the second frame connecting portion with an undercut.

A blow-molded unitary structure includes a panel having first and second panel walls and a generally hollow interior between the first and second panel walls. The structure also includes a plurality of depressions, or at least one ridge, or both the depressions and ridge to enhance the strength of the structure. The plurality of depressions is monolithically formed with the panel, recessing from the second panel wall toward the first panel wall. A depression has a side wall composed of first and second segments. Cross-sectional-wise, the first and second segments have different widths and thus collectively forms a step between the first and second segments. A ridge is also monolithically formed with the panel and includes a section, at which the width of the ridge varies along the height direction of the ridge.

A blow-molded plastic structure, such as a table top, may include an undercut. For example, the table top may include a frame receiving portion and a frame connecting structure with an undercut may be disposed in the frame receiving portion. A first portion of the frame may contact or engage the frame connecting structure when the frame is connected to the table top. In an exemplary embodiment, a first side of the frame receiving portion may include a first frame connecting portion with an undercut and a second side of the frame receiving portion may include a second frame connecting portion with an undercut. The first frame connecting portion with an undercut may be disposed on an opposing surface from the second frame connecting portion with an undercut.

The present disclosure discloses plastic composite board comprising an upper board, a lower board, and a fastener. The lower board supports the upper board. The upper board comprises a panel and a downward edge disposed on a periphery of the panel. The periphery of the panel sinks downward to define a horizontal step surface, and the downward edge extends downward from an outer edge of the horizontal step surface. The fastener comprises a buckle groove. An inner side of the buckle groove defines an opening, and the buckle groove surrounds side portions of the upper board and the lower board to fixedly clamp the upper board and the lower board together. An upper wall of the buckle groove abuts the horizontal step surface, and a top surface of the fastener is lower than a top surface of the upper board.

The present disclosure discloses a table panel, which comprises a table panel comprises a support panel and a metal frame. A periphery of the support panel is disposed with a downward folding edge, and the metal frame is disposed on a bottom of the support panel and is disposed along the periphery of the support panel. An outer side surface of the metal frame abuts an inner side surface of the downward folding edge. A lower end of the outer side surface of the metal frame is disposed with a connecting piece extending downward, and a bottom of the connecting piece is outwardly folded from a bottom of the downward folding edge to define a pressing edge configured to be buckled to an outer side of the bottom of the downward folding edge. The pressing edge is secured to the downward folding edge by riveting.