# US 2019/0167009 A1 · Self locking folding bedstead > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0167009 A1 - Document ID: US20190167009A1 - Status: Published application - Kind: A1 - Application number: 16/183,242 - Filed: 2018-11-07 - Published: 2019-06-06 - Earliest claimed: 2017-12-01 - Assignees: Xiamen Roadzup Outdoor Products Co., Ltd. - Applicants: Xiamen Roadzup Outdoor Products Co., Ltd. - Inventors: Changjiu HUANG - Web page: https://patentgrep.com/patent/US20190167009A1 ## CPC - A47C 19/14: of the lazy-tongs type - A47C 19/02: Parts or details of bedsteads not fully covered in a single one of the following subgroups, e.g. bed rails, post rails - A47C 19/126: {foldable side to side and head to foot, e.g. umbrella type} - A47C: CHAIRS; SOFAS; BEDS ## Abstract The invention discloses a self locking folding bedstead, which comprises two transverse rods and self locking cross mechanisms. The self locking cross mechanism comprises a shearing mechanism, two second connecting rods and two third connecting rods, and the shearing mechanism comprises two first connecting rods. One end of the second connecting rod can be rotatably connected to the transverse rod, the other end can be rotatably connected to the first connecting rod, the third connecting rod can be rotatably connected to the second connecting rod, and the third connecting rod can be rotatably connected to the other first connecting rod. The shearing mechanism, two second connecting rods and two third connecting rods cooperate to form two sets of symmetrically arranged hinge four connecting rods mechanism. The self locking cross mechanism is provided with a limiting mechanism to limit the maximum angle of deployment, and the angle of the opening facing downward formed by the two third connecting rods of the self locking cross mechanism at the maximum deployment angle is greater than 180 degrees. It has the following advantages: the mechanism can be kept in the self locking state, so that the bed width and bed height are fixed, so that the bed surface can be tightened, stable and non-dumping, comfortable to use. ## Claims ### Claim 1 A self locking folding bedstead includes two transverse rods and self locking cross mechanisms, the self locking cross mechanism comprises a shearing mechanism, which comprises two first connecting rods that can be rotatably connected together; wherein: the self locking cross mechanism also comprises two second connecting rods and two third connecting rods; one end of the second connecting rod can be rotatably connected to the transverse rod, the other end can be rotatably connected to the first connecting rod, the third connecting rod can be rotatably connected to the second connecting rod, and the third connecting rod can be rotatably connected to the other first connecting rod; the shearing mechanism, two second connecting rods and two third connecting rods cooperate to form two sets of symmetrically arranged hinge four connecting rods mechanism; the self locking cross mechanism is provided with a limiting mechanism to limit the maximum angle of deployment, and the angle of the opening facing downward formed by the two third connecting rods of the self locking cross mechanism at the maximum deployment angle is greater than 180 degrees; ### Claim 2 (depends on 1) The self locking folding bedstead according to claim 1, wherein: the first connecting rod is provided with an upper segment and a lower segment located on the upper and lower segments of the shear mechanism rotating point; the other end of the second connecting rod can be rotatably connected to the lower segment of the first connecting rod, and the third connecting rod can be rotatably connected to the upper segment of the other first connecting rod. ### Claim 3 (depends on 2) The self locking folding bedstead according to claim 2, wherein: the upper end of the second connecting rod can be rotatably connected to the transverse rod, and the lower end can be rotatably connected to the lower segment of the first connecting rod near the transverse rod. ### Claim 4 (depends on 3) The self locking folding bedstead according to claim 3, wherein: one end of the third connecting rod can be rotatably connected to the second connecting rod, and the third connecting rod can be rotatably connected to the upper segment of the first connecting rod near the transverse rod. ### Claim 5 (depends on 1) The self locking folding bedstead according to claim 1, wherein: the limiting mechanism is arranged between the first connecting rod and the third connecting rod that are rotatably connected. ### Claim 6 (depends on 5) The self locking folding bedstead according to claim 5, wherein: the limiting mechanism comprises an abutting member fixed at the other end of the third connecting rod, and the abutting member abuts against the first connecting rod from top to bottom to achieve the limit. ### Claim 7 (depends on 6) The self locking folding bedstead according to claim 6, wherein: the third connecting rod comprises two rods member, the first end of the two rods member is clamped with the second connecting rod and is provided with the first rotating shaft which pass through the two rods member and the second connecting rod to enable the two rods member and the second connecting rod to be rotatably connected together; the two rods member is clamped on both sides of the other first connecting rod and is provided with a second rotating shaft which pass through the two rods member and the other first connecting rod to enable the two rods member and the other first connecting rod to be rotatably connected together; the abutting member is fixed between the second ends of the two rods member. ### Claim 8 (depends on 1) The self locking folding bedstead according to claim 1, wherein: also comprising a supporting rod, the upper end of the supporting rod can be rotatably connected with the transverse rod, and the lower end of the first connecting rod and the lower end of the supporting rod can be rotatably connected. ### Claim 9 (depends on 8) The self locking folding bedstead according to claim 8, wherein: comprising at least two the self locking cross mechanisms, the end of the transverse rod is connected with one of the self locking crossing mechanisms mentioned above, and the self locking crossing mechanism connected with the end of the transverse rod is provided with two above mentioned supporting rod, the upper end of the supporting rod can be rotatably connected to the transverse rod, and the lower end is fixed with a fixed seat, and fixed seat is rotatably connected to the rotation seat, the lower end of the first connecting rod can be rotatably connected to the rotating seat. ### Claim 10 (depends on 2) The self locking folding bedstead according to claim 2, wherein: also comprising a supporting rod, the upper end of the supporting rod can be rotatably connected with the transverse rod, and the lower end of the first connecting rod and the lower end of the supporting rod can be rotatably connected. ### Claim 11 (depends on 3) The self locking folding bedstead according to claim 3, wherein: also comprising a supporting rod, the upper end of the supporting rod can be rotatably connected with the transverse rod, and the lower end of the first connecting rod and the lower end of the supporting rod can be rotatably connected. ### Claim 12 (depends on 4) The self locking folding bedstead according to claim 4, wherein: also comprising a supporting rod, the upper end of the supporting rod can be rotatably connected with the transverse rod, and the lower end of the first connecting rod and the lower end of the supporting rod can be rotatably connected. ### Claim 13 (depends on 5) The self locking folding bedstead according to claim 5, wherein: also comprising a supporting rod, the upper end of the supporting rod can be rotatably connected with the transverse rod, and the lower end of the first connecting rod and the lower end of the supporting rod can be rotatably connected. ### Claim 14 (depends on 6) The self locking folding bedstead according to claim 6, wherein: also comprising a supporting rod, the upper end of the supporting rod can be rotatably connected with the transverse rod, and the lower end of the first connecting rod and the lower end of the supporting rod can be rotatably connected. ### Claim 15 (depends on 10) The self locking folding bedstead according to claim 10, wherein: comprising at least two the self locking cross mechanisms, the end of the transverse rod is connected with one of the self locking crossing mechanisms mentioned above, and the self locking crossing mechanism connected with the end of the transverse rod is provided with two above mentioned supporting rod, the upper end of the supporting rod can be rotatably connected to the transverse rod, and the lower end is fixed with a fixed seat, and fixed seat is rotatably connected to the rotation seat, the lower end of the first connecting rod can be rotatably connected to the rotating seat. ### Claim 16 (depends on 11) The self locking folding bedstead according to claim 11, wherein: comprising at least two the self locking cross mechanisms, the end of the transverse rod is connected with one of the self locking crossing mechanisms mentioned above, and the self locking crossing mechanism connected with the end of the transverse rod is provided with two above mentioned supporting rod, the upper end of the supporting rod can be rotatably connected to the transverse rod, and the lower end is fixed with a fixed seat, and fixed seat is rotatably connected to the rotation seat, the lower end of the first connecting rod can be rotatably connected to the rotating seat. ### Claim 17 (depends on 12) The self locking folding bedstead according to claim 12, wherein: comprising at least two the self locking cross mechanisms, the end of the transverse rod is connected with one of the self locking crossing mechanisms mentioned above, and the self locking crossing mechanism connected with the end of the transverse rod is provided with two above mentioned supporting rod, the upper end of the supporting rod can be rotatably connected to the transverse rod, and the lower end is fixed with a fixed seat, and fixed seat is rotatably connected to the rotation seat, the lower end of the first connecting rod can be rotatably connected to the rotating seat. ### Claim 18 (depends on 13) The self locking folding bedstead according to claim 13, wherein: comprising at least two the self locking cross mechanisms, the end of the transverse rod is connected with one of the self locking crossing mechanisms mentioned above, and the self locking crossing mechanism connected with the end of the transverse rod is provided with two above mentioned supporting rod, the upper end of the supporting rod can be rotatably connected to the transverse rod, and the lower end is fixed with a fixed seat, and fixed seat is rotatably connected to the rotation seat, the lower end of the first connecting rod can be rotatably connected to the rotating seat. ### Claim 19 (depends on 14) The self locking folding bedstead according to claim 14, wherein: comprising at least two the self locking cross mechanisms, the end of the transverse rod is connected with one of the self locking crossing mechanisms mentioned above, and the self locking crossing mechanism connected with the end of the transverse rod is provided with two above mentioned supporting rod, the upper end of the supporting rod can be rotatably connected to the transverse rod, and the lower end is fixed with a fixed seat, and fixed seat is rotatably connected to the rotation seat, the lower end of the first connecting rod can be rotatably connected to the rotating seat.