A joined structure includes a joint section in which a plurality of tubular bodies formed of a ceramic-based composite material are joined to each other such that end surfaces of the tubular bodies abut each other via an intermediate material. The joint section is configured such that each of the end surfaces of the joined tubular bodies is inclined from one of an inner surface and an outer surface of the tubular body toward the other.

A joint assembly that includes first and second joint members is provided. The joint assembly includes a reinforcing member that has an outer surface that defines a plurality of cavities. Foam is located in the joint members and engages the reinforcing member such that the foam is located in the cavities of the reinforcing member. Additionally or alternatively, the joint assembly may be constructed so that the inner surface of the first joint member defines a plurality of cavities. Foam is located in the joint members and engages the inner surface of the first joint member so that it is located in the cavities of the first joint member. Various methods of manufacturing and treating the joint assembly are also provided.

A joint assembly that includes first and second joint members is provided. The joint assembly includes a reinforcing member that has an outer surface that defines a plurality of cavities. Foam is located in the joint members and engages the reinforcing member such that the foam is located in the cavities of the reinforcing member. Additionally or alternatively, the joint assembly may be constructed so that the inner surface of the first joint member defines a plurality of cavities. Foam is located in the joint members and engages the inner surface of the first joint member so that it is located in the cavities of the first joint member. Various methods of manufacturing and treating the joint assembly are also provided.

A connection piece includes a connection rod and a buckle. An end of the connection rod is bent to form a hem, and a through hole is provided in the hem. A through groove is provided in the buckle, and an inner wall of the through groove is provided thereon with a block protrusion corresponding to the through hole. The connection rod and the block protrusion are tightly fastened and fixed into the buckle via the through hole. A bedframe includes the connection piece.

The present invention aims to provide a joint structure, a joined assembly, and a set of members in which high joining strength is developed by fitting. It provides a joint structure including a first joint part formed in a first member and a second joint part formed in a second member that are fitted and fixed together wherein at least either of the first member and the second member is made of a fiber reinforced plastic material that contains reinforcing fibers with an average fiber length of 1 mm or more; the first joint part has a recessed shape in at least one cross-section of the joint structure while the second joint part has a shape that fits into the recessed shape of the first joint part in that cross-section; and there exists a pressing force between the first joint part and the second joint part so that the first member and the second member are fitted and fixed together.

The present invention aims to provide a joint structure, a joined assembly, and a set of members in which high joining strength is developed by fitting. It provides a joint structure including a first joint part formed in a first member and a second joint part formed in a second member that are fitted and fixed together wherein at least either of the first member and the second member is made of a fiber reinforced plastic material that contains reinforcing fibers with an average fiber length of 1 mm or more; the first joint part has a recessed shape in at least one cross-section of the joint structure while the second joint part has a shape that fits into the recessed shape of the first joint part in that cross-section; and there exists a pressing force between the first joint part and the second joint part so that the first member and the second member are fitted and fixed together.

The present invention relates to articulated arm devices with ramped unlocking and locking mechanisms. The articulated arm devices comprise hinge joints and ball joints that can be locked to position tools or instruments in place in three-dimensional space. Ramped unlocking and locking mechanisms are provided to unlock and lock the hinge joints and ball joints such that articulated arm devices can be rapidly repositioned in three-dimensional space and locked without collapsing.

A folding lock assembly for use in a frame for a portable child enclosure that includes a body housing first and second hinges for connecting a pair of equal-length side frame members. The respective hinges are limited in the degree of pivotal movement permitted each between a locked position in which the frame members are linearly aligned and a folded position in which the frame members are substantially parallel. The first hinge permits angular rotation less than 90 degrees while the second hinge permits angular rotation greater than 90 degrees. The differences in the range of hinge rotation offset the distal ends of the frame when the connected members are folded to eliminate a pinch point between frame end members. A latching mechanism is provided to maintain the hinges in a locked configuration wherein one hinge is locked by the position of the second hinge. Releasing the second hinge allows the first hinge to pivot as well.

A folding lock assembly for use in a frame for a portable child enclosure that includes a body housing first and second hinges for connecting a pair of equal-length side frame members. The respective hinges are limited in the degree of pivotal movement permitted each between a locked position in which the frame members are linearly aligned and a folded position in which the frame members are substantially parallel. The first hinge permits angular rotation less than 90 degrees while the second hinge permits angular rotation greater than 90 degrees. The differences in the range of hinge rotation offset the distal ends of the frame when the connected members are folded to eliminate a pinch point between frame end members. A latching mechanism is provided to maintain the hinges in a locked configuration wherein one hinge is locked by the position of the second hinge. Releasing the second hinge allows the first hinge to pivot as well.

A joint exhibits high tensile strength. The joint includes a solid rod having a slit or opening into which a wedge is inserted. The rod and wedge are inserted into a fitting. The internal surface of the fitting has a contour which continuously and nonlinearly varies with distance along the fitting. The wedge has a dimension having a similar contour. The shape of the contour can be described by a polynomial of order two or higher. The joint can be used to construct a sucker rod for an oil well, or it can be used in other applications. The joint can support high tensile loads, over long distances, while occupying a very narrow tubing bore.