# US 11,439,250 B2 · Child seat > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,439,250 B2 - Document ID: US11439250B2 - Status: Granted - Kind: B2 - Application number: 17/113,774 - Filed: 2020-12-07 - Published: 2021-03-25 - Granted: 2022-09-13 - Earliest claimed: 2018-04-20 - Assignees: Wonderland Switzerland AG - Applicants: Wonderland Switzerland AG - Inventors: Zhiren Zhong - Web page: https://patentgrep.com/patent/US11439250B2 ## CPC - A47D 1/02: Foldable chairs {(foldable rocking-chairs A47D13/101)} - A47D 1/10: capable of being suspended from, or attached to, tables or other articles - A47D 1/002: {adjustable} - A47D 1/006: {dismountable} - B60R 2021/0044: {Chest} - B62B 7/14: with detachable or rotatably-mounted body {(the body usable as a child's seat in a vehicle B60N2/2848)} - B62B 9/102: {characterized by details of the seat} - B62B 9/104: {with adjustable or reclining backrests} - A47D: FURNITURE SPECIALLY ADAPTED FOR CHILDREN (school benches or desks A47B39/00, A47B41/00) - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - B62B: HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES (characterised by animal propulsion B62C; propulsion of sledges by driver or engine B62M) ## Abstract A child seat includes a seat portion, a backrest frame and a front guard respectively connected pivotally with the seat portion, the backrest frame having multiple deployed positions and a collapsed position, the front guard being rotatable relative to the seat portion between an unfolded and a folded position, and a folding mechanism including a latch connected with the seat portion, and a linking part respectively coupled to the latch and the backrest frame. The latch can engage and lock the front guard in the unfolded position, and the backrest frame is rotatable to cause a displacement of the linking part that urges the latch to disengage and unlock the front guard. The folding mechanism is configured to keep the front guard in the unfolded position while the backrest frame is deployed for use, and to unlock the front guard as the backrest frame rotates toward the collapsed position. ## Claims ### Claim 1 A child seat comprising: a seat portion; a backrest frame and a front guard respectively connected pivotally with the seat portion, the backrest frame having a plurality of deployed positions and a collapsed position, and the front guard being rotatable relative to the seat portion between an unfolded position and a folded position; and a folding mechanism including a latch connected with the seat portion, and a linking part respectively coupled to the latch and the backrest frame, the latch being operable to lock the front guard in the unfolded position, the latch being engaged with the front guard for locking the front guard and disengaged from the front guard for unlocking the front guard, and the backrest frame being rotatable to cause a displacement of the linking part that urges the latch to unlock for rotation of the front guard; wherein the folding mechanism is configured to keep the front guard in the unfolded position while the backrest frame is in the deployed positions or any intermediate position between the deployed positions, and to unlock the front guard after the backrest frame rotates past the deployed positions toward the collapsed position. ### Claim 2 (depends on 1) The child seat according to claim 1, wherein the seat portion has two sidewalls respectively provided at a left and a right side, and the front guard transversally extends above the seat portion with two side end portions of the front guard respectively connected pivotally with the two sidewalls of the seat portion. ### Claim 3 (depends on 1) The child seat according to claim 1, wherein the folding mechanism further includes a spring connected with the front guard, the spring biasing the front guard toward the unfolded position. ### Claim 4 (depends on 1) The child seat according to claim 1, wherein the deployed positions include a first deployed position, and a second deployed position between the first deployed position and the collapsed position. ### Claim 5 (depends on 4) The child seat according to claim 4, wherein the front guard remains locked in position by the latch during adjustment of the backrest frame between the first and second deployed positions, and the latch is urged in movement by the linking part to disengage and unlock the front guard when the backrest frame rotates past the second deployed position and advances toward the collapsed position. ### Claim 6 (depends on 1) The child seat according to claim 1, wherein the linking part is coupled to the backrest frame with a pivotal connection, and is coupled to the latch with a sliding and pivotal connection. ### Claim 7 (depends on 6) The child seat according to claim 6, wherein the latch is pivotally connected with the seat portion. ### Claim 8 (depends on 6) The child seat according to claim 6, wherein one of the linking part and the latch includes an elongate slot, and the other one of the linking part and the latch has a pin disposed through the elongate slot, a course of the pin along the elongate slot is configured to provide a range of travel for the linking part that does not cause the latch to unlock the front guard. ### Claim 9 (depends on 8) The child seat according to claim 8, wherein the linking part is movable to urge the latch to disengage from the front guard via a contact between the pin and one end of the elongate slot. ### Claim 10 (depends on 9) The child seat according to claim 9, wherein the deployed positions include a first deployed position, and a second deployed position between the first deployed position and the collapsed position, and the contact between the end of the elongate slot and the pin of the latch occurs when the backrest frame rotating toward the collapsed position travels past an intermediate position between the second deployed position and the unfolded position of the front guard. ### Claim 11 (depends on 6) The child seat according to claim 6, wherein the linking part has an end portion pivotally connected with a side end portion of the backrest frame, the side end portion of the backrest frame having a limiting edge adjacent to the end portion of the linking part, the limiting edge preventing an undesirable displacement of the linking part that is not induced by a rotation of the backrest frame. ### Claim 12 (depends on 11) The child seat according to claim 11, wherein the limiting edge has a curved shape. ### Claim 13 (depends on 1) The child seat according to claim 1, wherein the folding mechanism further includes a spring connected with the latch, the spring biasing the latch to engage with the front guard. ### Claim 14 (depends on 1) The child seat according to claim 1, wherein the seat portion has a connector operable to detachably engage with a corresponding structure provided on a standing frame of a child supporting apparatus. ### Claim 15 A child seat comprising: a seat portion; a backrest frame and a front guard respectively connected pivotally with the seat portion; a latch connected with the seat portion, the latch being movable to lock and unlock one of the backrest frame and the front guard with respect to the seat position in position; and a linking part respectively coupled to the latch and the other one of the backrest frame and the front guard, the other one of the backrest frame and the front guard being rotatable to cause a displacement of the linking part that urges the latch to unlock; wherein one of the linking part and the latch includes an elongate slot, and the other one of the linking part and the latch has a pin disposed through the elongate slot, a course of the pin along the elongate slot is configured to provide a range of travel for the linking part that does not cause the latch to unlock. ### Claim 16 (depends on 15) The child seat according to claim 15, wherein the seat portion has two sidewalls respectively provided at a left and a right side, and the front guard transversally extends above the seat portion with two side end portions of the front guard respectively connected pivotally with the two sidewalls of the seat portion. ### Claim 17 (depends on 15) The child seat according to claim 15, wherein the backrest frame and the front guard are foldable toward a front of the seat portion. ### Claim 18 (depends on 15) The child seat according to claim 15, wherein the linking part is movable to urge the latch to disengage from the front guard via a contact between the pin and one end of the elongate slot.