# US 11,306,511 B2 · Rotary unlocking central lock device for foldable tent > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,511 B2 - Document ID: US11306511B2 - Status: Granted - Kind: B2 - Application number: 16/281,022 - Filed: 2019-02-20 - Published: 2019-12-05 - Granted: 2022-04-19 - Earliest claimed: 2018-05-29 - Assignees: Zhejiang Jiansheng Leisure Products Co.,Ltd - Applicants: Zhejiang Jiansheng Leisure Products Co., Ltd - Inventors: Yuanru Sun; Jian He - Web page: https://patentgrep.com/patent/US11306511B2 ## CPC - E05B 65/00: Locks {or fastenings} for special use - F16B 21/18: with circlips or like resilient retaining devices, {i.e. resilient in the plane of the ring or the like}; Details (spring-washers for locking nuts F16B39/24; adjusting rings F16B43/00) - E04H 15/50: lazy-tongs type - E04H 15/505: {characterised by connecting arches with lazy-tongues} - E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS - F16B: DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING (couplings for transmitting rotation F16D) - E04H: BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL (foundations E02D) ## Abstract A rotary unlocking central lock device is adapted for a foldable tent. The rotary unlocking central lock device includes a top plate base, a lock rod, a lower plate base, and a rotary base. The rotary base is rotatably fit with the lower plate base. A lock rod latch mechanism is disposed between the rotary base and the lower plate base. A top portion of the lock rod is fixed with the top plate base. A bottom portion of the lock rod penetrates through the lower plate base to fit with the lock rod latch mechanism. Locking and unlocking of the lock rod and the lock rod latch mechanism can be realized by rotation of the rotary base. ## Claims ### Claim 1 A rotary unlocking central lock device adapted for a foldable tent, the rotary unlocking central lock device comprising a top plate base, a lock rod, a lower plate base, and a rotary base, wherein the rotary base is rotatably fit with the lower plate base, a lock rod latch mechanism is disposed between the rotary base and the lower plate base, a top portion of the lock rod is fixed with the top plate base, a bottom portion of the lock rod penetrates through the lower plate base to fit with the lock rod latch mechanism, and locking and unlocking of the lock rod and the lock rod latch mechanism are realized by rotation of the rotary base, wherein a set of position-limiting pillars are disposed on the rotary base, a set of arc-shaped grooves fit with the position-limiting pillars are arranged on the lower plate base, and after the rotary base is fit with the lower plate base, positions of the position-limiting pillars are limited in the arc-shaped grooves, and the position-limiting pillars are movable in arc-shaped directions of the arc-shaped grooves. ### Claim 2 (depends on 1) The rotary unlocking central lock device as claimed in claim 1, wherein the lock rod latch mechanism comprises a latch plate and a lock rod engaging groove arranged on the lock rod, a latch hole is arranged at a middle portion of the latch plate, a pressing arc-shaped surface is disposed on a side portion of the latch plate, a pressing table fit with the pressing arc-shaped surface is disposed on the rotary base, and when the rotary base rotates, the pressing table presses the pressing arc-shaped surface of the latch plate, and the latch plate is moved, such that the lock rod engaging groove is engaged into or disengaged from the latch hole, so as to realize the lock or unlock of the lock rod and the lock rod latch mechanism. ### Claim 3 (depends on 1) The rotary unlocking central lock device as claimed in claim 1, wherein a set of top frame rod connecting bases configured to be hinged with top frame rods of the foldable tent are disposed on the top plate base. ### Claim 4 (depends on 1) The rotary unlocking central lock device as claimed in claim 1, wherein a set of support rod connecting bases configured to be hinged with support rods of the foldable tent are disposed on the lower plate base. ### Claim 5 (depends on 1) The rotary unlocking central lock device as claimed in claim 1, wherein a lock rod hole arranged for the lock rod to penetrate through is arranged at a middle portion of the lower plate base. ### Claim 6 (depends on 1) The rotary unlocking central lock device as claimed in claim 1, wherein the lower plate base and the rotary base are connected through position-limiting screws, and the position-limiting screws penetrate through the arc-shaped grooves and then are threadedly connected with the position-limiting pillars. ### Claim 7 (depends on 2) The rotary unlocking central lock device as claimed in claim 2, wherein a side of the latch plate opposite to the pressing arc-shaped surface is a position-limiting surface, and a position-limiting table fit with the position-limiting surface is disposed on the rotary base. ### Claim 8 (depends on 2) The rotary unlocking central lock device as claimed in claim 2, wherein the latch hole comprises an unlocking hole and a position-limiting hole in communication with each other, a diameter of the position-limiting hole is smaller than a diameter of the unlocking hole, the lock rod engaging groove engages into the position-limiting hole to lock the lock rod, the lock rod engaging groove enters the unlocking hole to unlock the lock rod. ### Claim 9 (depends on 7) The rotary unlocking central lock device as claimed in claim 7, wherein the latch hole comprises an unlocking hole and a position-limiting hole in communication with each other, a diameter of the position-limiting hole is smaller than a diameter of the unlocking hole, the lock rod engaging groove engages into the position-limiting hole to lock the lock rod, the lock rod engaging groove enters the unlocking hole to unlock the lock rod. ### Claim 10 (depends on 2) The rotary unlocking central lock device as claimed in claim 2, wherein an elastic member allowing the latch plate to be restored to an original position is disposed on the latch plate. ### Claim 11 (depends on 7) The rotary unlocking central lock device as claimed in claim 7, wherein an elastic member allowing the latch plate to be restored to an original position is disposed on the latch plate. ### Claim 12 A rotary unlocking central lock device adapted for a foldable tent, the rotary unlocking central lock device comprising a top plate base, a lock rod, a lower plate base, and a rotary base, wherein the rotary base is rotatably fit with the lower plate base, a lock rod latch mechanism is disposed between the rotary base and the lower plate base, a top portion of the lock rod is fixed with the top plate base, a bottom portion of the lock rod penetrates through the lower plate base to fit with the lock rod latch mechanism, and locking and unlocking of the lock rod and the lock rod latch mechanism are realized by rotation of the rotary base, wherein the lock rod latch mechanism comprises a latch plate and a lock rod engaging groove arranged on the lock rod, a latch hole is arranged at a middle portion of the latch plate, a pressing arc-shaped surface is disposed on a side portion of the latch plate, a pressing table fit with the pressing arc-shaped surface is disposed on the rotary base, and when the rotary base rotates, the pressing table presses the pressing arc-shaped surface of the latch plate, and the latch plate is moved, such that the lock rod engaging groove is engaged into or disengaged from the latch hole, so as to realize the lock or unlock of the lock rod and the lock rod latch mechanism. ### Claim 13 (depends on 12) The rotary unlocking central lock device as claimed in claim 12, wherein a side of the latch plate opposite to the pressing arc-shaped surface is a position-limiting surface, and a position-limiting table fit with the position-limiting surface is disposed on the rotary base. ### Claim 14 (depends on 12) The rotary unlocking central lock device as claimed in claim 12, wherein the latch hole comprises an unlocking hole and a position-limiting hole in communication with each other, a diameter of the position-limiting hole is smaller than a diameter of the unlocking hole, the lock rod engaging groove engages into the position-limiting hole to lock the lock rod, the lock rod engaging groove enters the unlocking hole to unlock the lock rod. ### Claim 15 (depends on 13) The rotary unlocking central lock device as claimed in claim 13, wherein the latch hole comprises an unlocking hole and a position-limiting hole in communication with each other, a diameter of the position-limiting hole is smaller than a diameter of the unlocking hole, the lock rod engaging groove engages into the position-limiting hole to lock the lock rod, the lock rod engaging groove enters the unlocking hole to unlock the lock rod. ### Claim 16 (depends on 12) The rotary unlocking central lock device as claimed in claim 12, wherein an elastic member allowing the latch plate to be restored to an original position is disposed on the latch plate. ### Claim 17 (depends on 13) The rotary unlocking central lock device as claimed in claim 13, wherein an elastic member allowing the latch plate to be restored to an original position is disposed on the latch plate. ### Claim 18 A rotary unlocking central lock device adapted for a foldable tent, the rotary unlocking central lock device comprising a top plate base, a lock rod, a lower plate base, and a rotary base, wherein the rotary base is rotatably fit with the lower plate base, a lock rod latch mechanism is disposed between the rotary base and the lower plate base, a top portion of the lock rod is fixed with the top plate base, a bottom portion of the lock rod penetrates through the lower plate base to fit with the lock rod latch mechanism, and locking and unlocking of the lock rod and the lock rod latch mechanism are realized by rotation of the rotary base, wherein a set of top frame rod connecting bases configured to be hinged with top frame rods of the foldable tent are disposed on the top plate base. ### Claim 19 A rotary unlocking central lock device adapted for a foldable tent, the rotary unlocking central lock device comprising a top plate base, a lock rod, a lower plate base, and a rotary base, wherein the rotary base is rotatably fit with the lower plate base, a lock rod latch mechanism is disposed between the rotary base and the lower plate base, a top portion of the lock rod is fixed with the top plate base, a bottom portion of the lock rod penetrates through the lower plate base to fit with the lock rod latch mechanism, and locking and unlocking of the lock rod and the lock rod latch mechanism are realized by rotation of the rotary base, wherein a set of support rod connecting bases configured to be hinged with support rods of the foldable tent are disposed on the lower plate base.