# US 10,766,385 B2 · Child safety seat > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,766,385 B2 - Document ID: US10766385B2 - Status: Granted - Kind: B2 - Application number: 16/113,741 - Filed: 2018-08-27 - Published: 2019-02-28 - Granted: 2020-09-08 - Earliest claimed: 2017-08-28 - Assignees: Wonderland Switzerland AG - Applicants: Wonderland Switzerland AG - Inventors: Kyle S. Mason; David A. Lehman - Web page: https://patentgrep.com/patent/US10766385B2 ## CPC - A47D 1/002: {adjustable} - B60N 2/26: for children (B60N2/30 takes precedence) - B60N 2/2803: {Adaptations for seat belts} - B60N 2/2812: {for securing the child to the child seat} - B60N 2/2851: {provided with head-rests} - B60N 2/2863: {backward facing} - B60N 2/2872: {provided with side rests} - B60N 2/2816: {with additional belt accessories, e.g. belt tension detectors} - B60N 2/2818: {characterised by guiding means for children belts} - A47D: FURNITURE SPECIALLY ADAPTED FOR CHILDREN (school benches or desks A47B39/00, A47B41/00) - B60N: SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR ## Abstract A child safety seat includes a seat shell having a seat region for receiving a child, two extension parts and a locking mechanism. The two extension parts are respectively disposed at a left and a right side of the seat region, are connected with the seat shell, and are coupled to each other via a linking assembly. The two extension parts are movable together relative to the seat shell to protrude forward from a front of the seat shell or retract toward the seat shell, the two extension parts being disconnected from each other at the front of the seat shell. The locking mechanism is operable to lock the two extension parts in position relative to the seat shell. ## Claims ### Claim 1 A child safety seat comprising: a seat shell having a seat region for receiving a child; two extension parts respectively disposed at a left and a right side of the seat region and connected with the seat shell, the two extension parts being coupled to each other via a linking assembly, the two extension parts being movable together relative to the seat shell to protrude forward from a front of the seat shell or retract toward the seat shell, the two extension parts being disconnected from each other at the front of the seat shell; and a locking mechanism operable to lock the two extension parts in position relative to the seat shell; wherein the linking assembly includes two gears rotationally coupled to each other that are pivotally connected with the seat shell, and the two extension parts respectively have two toothed portions inside the seat shell, the two gears respectively meshing with the two toothed portions of the two extension parts. ### Claim 2 (depends on 1) The child safety seat according to claim 1, wherein the two extension parts are slidable relative to the seat shell to protrude forward from the front of the seat shell or retract toward the seat shell. ### Claim 3 (depends on 1) The child safety seat according to claim 1, wherein the two gears are fixedly connected with a transversal shaft, the two gears and the transversal shaft being rotatable in unison relative to the seat shell. ### Claim 4 (depends on 1) The child safety seat according to claim 1, wherein the locking mechanism includes a latch connected with the seat shell and movable to engage with and disengage from the linking assembly, an engagement of the latch with the linking assembly rotationally locking the two gears and thereby preventing movement of the two extension parts relative to the seat shell, and a disengagement of the latch from the linking assembly allowing rotation of the two gears for movement of the two extension parts relative to the seat shell. ### Claim 5 (depends on 4) The child safety seat according to claim 4, wherein the latch is movable to engage with and disengage from one of the two gears. ### Claim 6 (depends on 5) The child safety seat according to claim 5, wherein the latch is pivotally connected with the seat shell, and is connected with an actuation part accessible from the front of the seat shell for operation, the actuation part being operable to cause the latch to rotate and disengage from the gear. ### Claim 7 (depends on 5) The child safety seat according to claim 5, wherein the latch is slidably connected with the seat shell, and is connected with an actuation part accessible from a side of the seat shell for operation, the actuation part being operable to cause the latch to slide and disengage from the gear. ### Claim 8 (depends on 7) The child safety seat according to claim 7, wherein the actuation part is operable to cause the latch to slide along a transversal axis extending from the left to the right side of the seat shell for disengaging from the gear. ### Claim 9 (depends on 4) The child safety seat according to claim 4, wherein the two gears are fixedly connected with a transversal shaft, and the latch is movable to engage with and disengage from the transversal shaft. ### Claim 10 (depends on 9) The child safety seat according to claim 9, wherein the transversal shaft has a toothed portion disposed between the two gears, and the latch engages with the toothed portion to rotationally lock the transversal shaft and the two gears. ### Claim 11 (depends on 1) The child safety seat according to claim 1, wherein the two gears are fixedly connected with a transversal shaft, and the locking mechanism includes a latch connected with the transversal shaft, the latch being slidable axially relative to the transversal shaft and rotationally coupled to the transversal shaft, the latch being movable to engage with and disengage from the seat shell, an engagement of the latch with the seat shell rotationally locking the transversal shaft and the two gears and thereby preventing movement of the two extension parts relative to the seat shell, and a disengagement of the latch from the seat shell allowing the latch, the transversal shaft and the two gears to rotate in unison as the two extension parts move relative to the seat shell. ### Claim 12 (depends on 11) The child safety seat according to claim 11, wherein the seat shell has an opening, and the locking mechanism further includes a spring biasing the latch for engagement with the opening of the seat shell. ### Claim 13 A child safety seat comprising: a seat shell having a seat region for receiving a child; two extension parts respectively disposed at a left and a right side of the seat region and connected with the seat shell, the two extension parts being coupled to each other via a linking assembly, the two extension parts being movable together relative to the seat shell to protrude forward from a front of the seat shell or retract toward the seat shell, the two extension parts being disconnected from each other at the front of the seat shell; and a locking mechanism operable to lock the two extension parts in position relative to the seat shell; wherein the linking assembly includes two cables, each of the two cables having two opposite ends respectively connected with the two extension parts, one of the two cables being configured to slidably couple the two extension parts in a deploying direction, and the other one of the two cables being configured to slidably couple the two extension parts in a retracting direction. ### Claim 14 (depends on 13) The child safety seat according to claim 13, wherein the locking mechanism includes a latch carried on one of the two extension parts, the latch being movable to engage with and disengage from the seat shell for adjustment of the two extension parts. ### Claim 15 (depends on 14) The child safety seat according to claim 14, wherein the seat shell includes a row of locking openings for engagement of the latch. ### Claim 16 (depends on 15) The child safety seat according to claim 15, wherein the latch is movably connected with the extension part, whereby the latch is movable relative to the extension part to engage with and disengage from the locking openings provided in the seat shell. ### Claim 17 (depends on 16) The child safety seat according to claim 16, wherein the locking mechanism further includes an actuation part operable to urge the latch to move relative to the extension part for disengaging from the seat shell. ### Claim 18 (depends on 15) The child safety seat according to claim 15, wherein the latch is fixedly connected with the extension part, the extension part and the latch fixedly connected therewith being rotatable in unison to engage the latch with any one of the locking openings and to disengage the latch from the locking openings.