A central lock for a folding tent includes a central lock rod, an upper lock plate fixedly disposed at one end of the central lock rod, and a lower lock plate assembly detachably connected to the other end of the central lock rod. An elastic locking member and an unlocking mechanism used to control the elastic locking member to be locked are disposed in the lower lock plate assembly. The elastic locking member includes an arc-shaped portion provided integrally and two horizontal locking rods extending inwards from a gap of the arc-shaped portion. A lower end portion of the central lock rod is provided with a locking groove used in cooperation with the locking rod and a clamping and locking portion located at a lower end of the locking groove.

A multiple rod linkage structure includes at least a first rod piece and a second rod piece which are muff-coupled. The first rod piece having a rod opening end sleeved within the second rod piece, and a rod strip opening being opened on a sidewall of the rod opening end. A locking element is connected between the first rod piece and the second rod piece, movably passes through a sidewall of the second rod piece and a sidewall of the first rod piece from outside to inside, is screw-thread fitted with a sidewall of the first rod piece, and then presses against another sidewall of the first rod piece. A tent uses the multiple rod linkage structure as a beam and/or a top rod.

A multiple rod linkage structure includes at least a first rod piece and a second rod piece which are muff-coupled. The first rod piece having a rod opening end sleeved within the second rod piece, and a rod strip opening being opened on a sidewall of the rod opening end. A locking element is connected between the first rod piece and the second rod piece, movably passes through a sidewall of the second rod piece and a sidewall of the first rod piece from outside to inside, is screw-thread fitted with a sidewall of the first rod piece, and then presses against another sidewall of the first rod piece. A tent uses the multiple rod linkage structure as a beam and/or a top rod.

Device for tensioning a fabric of a tent comprising a tensioning device, a corner protection device as well as a fastening element, wherein the tensioning device (9) presses against at least one tensioning element (6) of the corner protection device (5), on which the fabric of the tent (1, 12) can be arranged, wherein a fastening element (7) is arranged on the lower part (59) of the corner protection device (5).

A floating vessel modular protection and security device includes a stationary bowed frame configured to be positioned over a floating vessel, the stationary frame and a moveable bowed frame. A stationary flexible cover extends from one end to the other end of the stationary bowed frame, covering stationary crossbeams. The stationary flexible cover having a length from end to end that is shorter than a length of the floating vessel. A moveable flexible cover extends from one end to the other end of the moveable bowed frame, covering the movable bowed frame crossbeams. The movable bowed frames slides on the upper moveable frame track and lower stationary frame track simultaneously to repeatedly retract and deploy to access or secure a floating vessel.

A floating vessel modular protection and security device includes a stationary bowed frame configured to be positioned over a floating vessel, the stationary frame and a moveable bowed frame. A stationary flexible cover extends from one end to the other end of the stationary bowed frame, covering stationary crossbeams. The stationary flexible cover having a length from end to end that is shorter than a length of the floating vessel. A moveable flexible cover extends from one end to the other end of the moveable bowed frame, covering the movable bowed frame crossbeams. The movable bowed frames slides on the upper moveable frame track and lower stationary frame track simultaneously to repeatedly retract and deploy to access or secure a floating vessel.

A multiple rod linkage structure includes at least a first rod piece and a second rod piece which are muff-coupled. The first rod piece having a rod opening end sleeved within the second rod piece, and a rod strip opening being opened on a sidewall of the rod opening end. A locking element is connected between the first rod piece and the second rod piece, movably passes through a sidewall of the second rod piece and a sidewall of the first rod piece from outside to inside, is screw-thread fitted with a sidewall of the first rod piece, and then presses against another sidewall of the first rod piece. A tent uses the multiple rod linkage structure as a beam and/or a top rod.

A multiple rod linkage structure includes at least a first rod piece and a second rod piece which are muff-coupled. The first rod piece having a rod opening end sleeved within the second rod piece, and a rod strip opening being opened on a sidewall of the rod opening end. A locking element is connected between the first rod piece and the second rod piece, movably passes through a sidewall of the second rod piece and a sidewall of the first rod piece from outside to inside, is screw-thread fitted with a sidewall of the first rod piece, and then presses against another sidewall of the first rod piece. A tent uses the multiple rod linkage structure as a beam and/or a top rod.

A modular protection and security device for protecting a boat within a slip having: a stationary bowed frame positioned over the boat slip; a plurality of stationary frame tracks mounted to a side of the stationary bowed frame; a plurality of upper track rollers mounted to the stationary bowed frame; a moveable bowed frame mounted to the upper track rollers and slidable over the stationary bowed frame; a plurality of moveable frame tracks, each moveable frame track mounted to a side of the moveable bowed frame; a plurality of lower track rollers mounted to the movable bowed frame positioned for rolling within in the stationary frame tracks; a first flexible sheath mounted to the stationary bowed frame and a second flexible sheath mounted to the moveable bowed frame, wherein the first flexible sheath is configured to fit between the moveable bowed frame and the stationary bowed frame.

A collapsible canopy with an improved locking mechanism. The collapsible canopy has at least three supporting legs. The collapsible canopy also has a central lock that is used for locking the collapsible canopy in an unfolded state and permits the collapsible canopy to be folded into a folded state when the central lock is unlocked. An outer retractable unit is connected between each adjacent supporting leg. An inner retractable unit having an inner end is connected between each supporting leg and the central lock. The inner end of the inner retractable unit is connected through the central lock. Reinforcement bars are pivotally connected between the outer retractable units and the inner retractable units, the reinforcement bars function to maintain the shape of the collapsible canopy when the collapsible canopy is in a locked and unfolded position.