Energy absorbing base for child car seat

Abstract

A child seat system installable on a vehicle seat includes a first portion affixable to the vehicle seat and a second portion for receiving an occupant. An energy absorbing mechanism is connected to the first portion at at least one first anchor location and connected to the second portion at at least one second anchor location. The energy absorbing mechanism is configured to transform a crash force into a torque load. The energy absorbing mechanism is deformable in response to the torque load to dissipate energy.

Description

WIA0336PCT (AP-24184-3520-WQ000)ENERGY ABSORBING BASE FOR CHILD CAR SEATCROSS REFERENCE TO RELATED APPLICATIONSThis application claims the benefit of U.S. Application No. 63 / 738,478, filed on December 23, 2024, and U.S. Application No. 63 / 922,582, filed on November 21, 2025, which is incorporated herein by reference in its entirety.FIELD

[0001] Embodiments of the present disclosure relate to the art of child seat systems for use in a vehicle, and more particularly to child car seats having multiple use configurations.BACKGROUND

[0002] Some child car seats currently available on the market have multiple use configurations that allow for the seats to continue to be used as a child grows. For example, some child car seats can be selectively used in any one or more of (1) a rear facing, reclined configuration for infants, (2) a forward facing, reclined configuration for toddlers, (3) a forward facing, high-back booster configuration for children weighing between, e.g., 40 pounds and 100 pounds, and (4) a forward facing, backless booster configuration for children weighing between, e.g., 40 pounds and 120 pounds.

[0003] Conventional child car seats use the inherent stiffness and geometry of the seat to absorb and channel forces from the vehicle to the child. Most do not include any intentional mechanical force limiting concept. Some vehicles have load limiter mechanisms built into the occupant harness. One common method of load limiting is mounting the seat belt retractor spool onto a torsion arm. During a crash when the seatbelt pulls tightly on the spool, the torsion arm twists allowing some pay out of webbing. This limits the peak force on the occupants.

[0004] Generally, child car seats protect a child during a crash event by retaining a child within the seat using a harness, but the seat may not absorb or dissipate crash forces before they are transferred to the child. Car seat structure, therefore, needs to be a fine balance of rigidity and flexibility. If the structure is too rigid it will transfer forces into the child too quickly near the beginning of the crash event. If the structure is too flexible it will stretch and excessively allow contact between the seat and vehicle interior.WIA0336PCT (AP-24184-3520-WO000)BRIEF DESCRIPTION

[0005] According to an embodiment, a child seat system installable on a vehicle seat includes a first portion affixable to the vehicle seat and a second portion for receiving an occupant. An energy absorbing mechanism is connected to the first portion at at least one first anchor location and connected to the second portion at at least one second anchor location. The energy absorbing mechanism is configured to transform a crash force into a torque load. The energy absorbing mechanism is deformable in response to the torque load to dissipate energy.

[0006] In addition to one or more of the features described above, or as an alternative, in further embodiments the at least one second anchor location is vertically offset from the at least one first anchor location.

[0007] In addition to one or more of the features described above, or as an alternative, in further embodiments the at least one second anchor location is offset from the at least one first anchor location in a plane orthogonal to an axis extending between a front and rear of the child seat system.

[0008] In addition to one or more of the features described above, or as an alternative, in further embodiments the energy absorbing mechanism includes at least one linkage, the at least one linkage being deformable in response to the torque load to dissipate the energy.

[0009] In addition to one or more of the features described above, or as an alternative, in further embodiments deformation of the at least one linkage in response to the torque load is plastic.

[0010] In addition to one or more of the features described above, or as an alternative, in further embodiments the at least one linkage is connected to the first portion at the at least one first anchor location and is connected to the second portion at the at least one second anchor location.

[0011] In addition to one or more of the features described above, or as an alternative, in further embodiments the at least one linkage includes a plurality of linkages, the at least one first anchor location includes a plurality of first anchor locations and the at least one second anchor location includes a plurality of second anchor locations. Each linkage of the plurality of linkages is connected to the first portion at a respective first anchor location of the plurality of first anchor locations and is connected to the second portion at a respective second anchor location of the plurality of second anchor locations.

[0012] In addition to one or more of the features described above, or as an alternative, in further embodiments the at least one linkage includes a link arm and a torsion bar. TheWIA0336PCT (AP-24184-3520-WO000)torsion bar is connected to the first portion at the at least one first anchor location and the link arm is connected to the second portion at the at least one second anchor location.

[0013] In addition to one or more of the features described above, or as an alternative, in further embodiments the link arm extends orthogonally from the torsion bar.

[0014] In addition to one or more of the features described above, or as an alternative, in further embodiments the link arm is rotatably fixed to the torsion bar.

[0015] In addition to one or more of the features described above, or as an alternative, in further embodiments the link arm is integrally formed with the torsion bar.

[0016] In addition to one or more of the features described above, or as an alternative, in further embodiments the at least one linkage is connected to the first portion via a preliminary connection and a secondary connection.

[0017] In addition to one or more of the features described above, or as an alternative, in further embodiments the link arm is connected to the first portion at the preliminary connection and the torsion bar is connected to the first portion at the secondary connection.

[0018] In addition to one or more of the features described above, or as an alternative, in further embodiments the at least one linkage is deformable at the preliminary connection in response to the crash force exceeding a first threshold and is deformable at the secondary connection when the crash force exceeds a second threshold.

[0019] In addition to one or more of the features described above, or as an alternative, in further embodiments the at least one linkage is deformable at the secondary connection only after deformation of the preliminary connection.

[0020] In addition to one or more of the features described above, or as an alternative, in further embodiments the at least one linkage is pivotally coupled to the second portion and is fixedly coupled to the first portion.

[0021] In addition to one or more of the features described above, or as an alternative, in further embodiments the second portion includes a child seat.

[0022] In addition to one or more of the features described above, or as an alternative, in further embodiments the child seat is positionable in a forward-facing configuration relative to the first portion.

[0023] In addition to one or more of the features described above, or as an alternative, in further embodiments the child seat is positionable in a rearward-facing configuration relative to the first portion.

[0024] In addition to one or more of the features described above, or as an alternative, in further embodiments the child seat is an infant car seat.WIA0336PCT (AP-24184-3520-WO000)BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following descriptions should not be considered limiting in any way. With reference to the accompanying drawings, like elements are numbered alike:

[0026] FIG. l is a side view of a child seat system according to an embodiment;

[0027] FIG. 2 is a perspective view of a child seat of the child seat system of FIG. 1 according to an embodiment;

[0028] FIG. 3 is a front view of a child seat of the child seat system of FIG. 1 according to an embodiment;

[0029] FIG. 4A is a schematic diagram of a child seat system including an energy absorbing mechanism in a first configuration according to an embodiment;

[0030] FIG. 4B is a schematic diagram of the child seat system of FIG. 4A including an energy absorbing mechanism in a second configuration according to an embodiment;

[0031] FIG. 5 is a detailed perspective view of the energy absorbing mechanism of FIGS. 4A and 4B according to an embodiment;

[0032] FIG. 6 is a side perspective view of the energy absorbing mechanism of FIGS.4A and 4B according to an embodiment;

[0033] FIG. 7 is another perspective view of the energy absorbing mechanism of FIGS.4A and 4B in a first configuration according to an embodiment;

[0034] FIG. 8 is a side view of the energy absorbing mechanism of FIGS. 4A and 4B in a second configuration according to an embodiment;

[0035] FIG. 9A is a detailed side view of a link arm of the energy absorbing mechanism of FIGS. 4A and 4B in a first configuration according to an embodiment;

[0036] FIG. 9B is a detailed side view of the link arm of FIG. 9A when the energy absorbing mechanism is in a second configuration according to an embodiment;

[0037] FIG. 10 is a perspective view of the energy absorbing mechanism of FIGS. 4A and 4B in a first configuration according to another embodiment;

[0038] FIG. 11A is a cross-sectional view of a seat mount having a receiving component in a locked position according to an embodiment;

[0039] FIG. 1 IB is a cross-sectional view of the seat mount of FIG. 11A with the receiving component in an unlocked position according to an embodiment;

[0040] FIG. 12 is a graph representing stress-strain curve of an example material for an energy absorbing mechanism during application of a crash force according to an embodiment;

[0041] FIG. 13 A is a perspective view of a child seat system according to another embodiment;WIA0336PCT (AP-24184-3520-WO000)

[0042] FIG. 13B is a side view of the child seat system of FIG. 13 A positioned about a vehicle seat according to an embodiment;

[0043] FIG. 14A is a perspective view of the perspective view of an energy absorbing mechanism of the child seat of FIGS. 13A-13B when the child seat is in a forward-facing configuration according to an embodiment;

[0044] FIG. 14B is a side view of the child seat and energy absorbing mechanism of FIG. 14A according to an embodiment;

[0045] FIG. 15A is a perspective view of the perspective view of an energy absorbing mechanism of the child seat of FIGS. 13A-13B when the child seat is in a rearward-facing configuration according to an embodiment;

[0046] FIG. 15B is a side view of the child seat and energy absorbing mechanism of FIG. 15A according to an embodiment.DETAILED DESCRIPTION

[0047] A detailed description of one or more embodiments of the disclosed apparatus and method are presented herein by way of exemplification and not limitation with reference to the Figures.

[0048] With reference now to FIGS. 1-3, an exemplary child seat system 20 is illustrated. The child seat system 20 may be installed about a vehicle seat 10. As shown, the child seat system 20 includes a support base 22 detachably affixable to a vehicle seat 10, such as via a latch or anchor mechanism. This latch or anchor system often used is sometimes referred to as a “lower anchor and tether for children” e.g., LATCH system, and includes one or more anchors 23 connectable to a vehicle anchor (not shown) of the vehicle seat. Alternatively, or in addition, the support base 22 may be detachably fixed to a vehicle seat 10 via a vehicle belt associated with the vehicle seat.

[0049] The child seat system 20 may additionally include a child seat 24 associated with the support base 22. In an embodiment, the child seat 24 is detachably connectable to the support base 22, thereby allowing the child seat 24 to be separated from the support base 22. Alternatively, the support base 22 and at least a portion of the child seat 24 may be permanently connected or affixed together. As used herein the term “permanently connected” identifies embodiments where the child seat 24 or a portion thereof is not intended to be disassembled from the support base 22 by a user. The child seat 24 includes a seat shell 25 having a seat back portion 26 and a seat pan portion 28 arranged at an angle relative to the seat back portion 26.WIA0336PCT (AP-24184-3520-WO000)

[0050] As shown, the seat back portion 26 of the seat shell 25 includes an upright support surface 30 generally facing forward and that extends from a first end or top 32 to a second, opposite end or bottom 34 of the seat back portion 26. A first upright side member 36 may be arranged at a first side 38 of the upright support surface 30 and a second upright side member 40 may be arranged at a second, opposite side 42 of the upright support surface 30. The first and second upright side members 36, 40 therefore form the left side and the right side of the seat back portion 26, respectively. As shown, the first and second upright side members 36, 40 extend forward from the upright support surface 30. The first and second upright side members 36, 40 may extend generally orthogonally to the upright support surface 30, or alternatively, may extend therefrom at another angle, such as an angle greater than 90° for example. Accordingly, the upright support surface 30 and the first and second upright side members 36, 40 define a backrest region or upright support cavity within which an upper body of a child is received.

[0051] As shown in FIG. 3, the seat back portion 26 of the child seat 24 may include a headrest 44. In such embodiments, the headrest 44 may be attached to or may be integral with the seat back portion 26. The headrest 44 may be stationary or in some embodiments, may be configured to move relative to the upright support surface 30. For example, the headrest 44 may be configured to translate relative to the upright support surface 30 between a retracted position and an extended position, allowing for adjustment based on the size of the child positioned within the child seat 24. In other embodiments, the child seat 24 may not include a headrest 44.

[0052] The seat pan portion 28 includes a seat support surface 50 facing generally upwardly and that extends from a first end or front 52 to a second end or back 54 of the seat pan portion 28. A first seat side member 56 may be arranged at a first side 58 of the seat support surface 50 and a second seat side member 60 may be arranged at a second, opposite side 62 of the seat support surface 50. The first seat side member 56 and the second seat side member 60 may extend generally upwardly from the seat support surface 50 and form the left side and the right side of the seat pan portion 28. The seat support surface 50 and the first and second seat side member 56, 60 in combination define a region within which at least part of a lower body of a child may be received. Accordingly, the seat pan portion 28 and the seat back portion 26 in combination define a child receiving cavity of the child seat 24.

[0053] As shown, the seat side members 56, 60 extend at an angle from the seat support surface 50. The angle of the first seat side member 56 relative to the seat support surface 50 may but need not be the same as the angle of the first upright side member 36 relative to theWIA0336PCT (AP-24184-3520-WO000)upright support surface 30. Similarly, the angle of the second seat side member 60 relative to the seat support surface 50 may but need not be the same as the angle of the second upright side member 40 relative to the upright support surface 30. In an embodiment, the first upright side member 36 and the first seat side member 56 are integrally formed and the second upright side member 40 and the second seat side member 60 are integrally formed.

[0054] One or more cushions or soft padding, referred to herein as seat soft goods 64, may be disposed in overlapping arrangement with one or more surfaces of the seat pan portion 28 and / or with one or more surfaces of the seat back portion 26 to comfortably support a child that is positioned within the child seat 24. For example, in the non-limiting embodiment of FIG. 2, seat soft goods 64 are positioned in overlapping arrangement with one or more of the upright support surface 30, the top 32 of the seat back portion 26, the seat support surface 50, the front 52 of the seat pan portion 28, one or more surfaces of each upright side member 36, 40 and / or one or more surfaces of each seat side member 56, 60. It should be appreciated that the child seat 24 as illustrated and described herein is intended as an example only and that a child seat 24 having any suitable configuration is within the scope of the disclosure.

[0055] In the illustrated, non-limiting embodiment of FIGS. 1-7, the child seat 24 is configured as an infant car seat. When configured as an infant car seat, the child seat 24 may include a carrying handle 70. As shown, the carrying handle 70 may have a generally arcuate shape and the two opposite ends 72, 74 thereof are respectively connected with a left and right side of the seat shell 25. In some embodiments, the carrying handle 70 is movably connected with the seat shell 25. Accordingly, the carrying handle 70 may be transformable, for example rotatable about a handle axis H, between a plurality of positions or angles relative to the seat shell 25, such as to more easily access the child positioned within the child seat 24 or for storage purposes for example. Examples of the angular positions include when the carrying handle 70 extends within a vertically oriented plane (FIG. 3), also referred to herein as a “carrying position,” when the carrying handle 70 is reclined rearwardly, such as behind the seat back portion 26 for example (FIG. 2), and when the carrying handle 70 is rotated forward toward the front 52 of the seat pan portion 28, referred to herein as a “forward position.” It should be understood that the carrying handle 70 may also be arranged at other angular positions along the path of movement of the carrying handle 70.

[0056] With continued reference to FIG. 1, the support base 22 may include a housing 80 having a base seat portion 82 positionable in contact with an upper surface of the seat pan of the vehicle seat 10 and a base back portion 84 proximate to, or in contact with a seat back of the vehicle seat. In an embodiment, the base back portion 84 is arranged at an end of theWIA0336PCT (AP-24184-3520-WO000)base seat portion 82 and extends at an angle therefrom. With reference to FIGS. 2-4B and 7, the child seat 24 may include at least one mounting component 76a, 76b, such as a seat connector for example, engageable with the support base 22 to couple the child seat 24 to the support base 22. In the illustrated, non-limiting embodiment, the at least one mounting component of the child seat 24 includes a first mounting component 76a and a second mounting component 76b located proximate a bottom 77 of the child seat 24. However, it should be understood that embodiments including only a single mounting component, or alternatively, including more than two mounting components are also within the scope of the disclosure.

[0057] As shown, the first and second mounting components 76a, 76b may be continuous bars or shafts that extend laterally between opposing sides of the child seat 24. In other embodiments the first and second mounting components 76a, 76b may be discontinuous. The first and second mounting components 76a, 76b may be longitudinally spaced apart. As shown, the first mounting component 76a may be proximate a front end 78 of the child seat 24, and the second mounting component 76b may be located proximate a back end 79 of the child seat 24. Accordingly, the first mounting component 76a may be considered a front mounting component and the second mounting component 76b may be considered a rear mounting component.

[0058] Although the child seat 24 is illustrated and described herein as an infant car seat, it should be understood that embodiments including a child seat 24 having another suitable configuration, such as a toddler seat (e.g., a convertible child car seat usable in either rear or forward facing configurations) for example, are also within the scope of the disclosure. Further, although the child seat 24 is illustrated and described herein as being removably connectable to the support base 22, in other embodiments, the child seat 24 may be permanently connected to the support base 22 and is not intended to separate therefrom during normal usage of the child seat system 20. Accordingly, the child seat 24 as described herein may be mountable to the vehicle seat in either a rearward-facing configuration or a forward-facing configuration.

[0059] As is shown in the exemplary embodiment of FIGS. 4-8, the support base 22 of the child seat system 20 includes an energy absorbing mechanism 100. The energy absorbing mechanism 100 may be mounted within the housing 80, such as within the base seat portion 82 of the housing 80 for example. The child seat 24 may be removably connectable to the energy absorbing mechanism. For example, one or more slots (not shown) may be formed in the housing 80 of the support base 22, and the mounting components 76a, 76b of the child seat 24 may be positionable within the slots for engagement with the energy absorbing mechanism.WIA0336PCT (AP-24184-3520-WO000)

[0060] The energy absorbing mechanism 100 includes a fixed portion and a movable portion. The fixed portion of the energy absorbing mechanism 100 may include a rigid first frame 102 located proximate a bottom of the support base 22. When the support base 22 is installed about a vehicle seat 10, the first frame 102 may be positioned adjacent to and supported by the seat pan 12 of the vehicle seat 10. In the illustrated, non-limiting embodiment, the first frame 102 includes a first lateral lower frame member 104a and a second lateral lower frame member 104b extending generally between a back 14 and a front 16 of the vehicle seat pan 12. The first and second lateral members 104a, 104b may be oriented parallel to one another, and in some embodiments, may have substantially identical configurations. As shown, at least one lower frame cross-member 106a, 106b may extend between and connect the first and second lateral lower frame members 104a, 104b. In the illustrated, non-limiting embodiment, a first lower frame cross-member 106a is located at a central portion of the lateral lower frame members 104a, 104b and a second lower frame cross-member 106b is connected to the lateral lower frame members 104a, 104b near a front end 16 of the vehicle seat pan 12.

[0061] The movable portion of the energy absorbing mechanism 100 may include a rigid, second frame 108. The second frame 108 may similarly include a first lateral upper frame member 110a and a second lateral upper frame member 110b extending between the front 16 and back 14 of the vehicle seat pan 12. The first and second lateral upper frame members 110a, 110b may be oriented parallel to one another, and in some embodiments, may have substantially identical configurations. The first and second lateral upper frame members 110a, 110b may but need not be parallel to the first and second lateral lower frame lateral members 104a, 104b. As shown, at least one upper frame cross-member 112a, 112b may extend between and connect the first and second lateral upper frame members 110a, 110b. In the illustrated, non-limiting embodiment, a first upper frame cross-member 112a (FIG. 6) is located at a central portion of the lateral upper frame members 110a, 110b and a second upper frame cross-member 112b (FIG. 7) is connected to the lateral upper frame members 110a, 110b near a front end 16 of the vehicle seat pan 12. Because the second frame 108 is vertically offset from the first frame 102 in a vertical direction, the first frame 102 is considered herein to be a lower frame of the energy absorbing mechanism 100, and the second frame 108 is considered herein to be an upper frame of the energy absorbing mechanism 100.

[0062] In an embodiment, a first front seat mount 114a is arranged at a first end of the first lateral upper frame member 110a and a second front seat mount 114b is arranged at aWIA0336PCT (AP-24184-3520-WO000)first end of the second lateral upper frame member 110b. Similarly, a first rear seat mount 116a may be arranged at a second end of the first lateral upper frame member 110a and a second rear seat mount 116b may be arranged at a second end of the second lateral upper frame member 110b. Each front seat mount 114a, 114b may include a laterally extending recess or groove configured to receive a mounting component, such as the second mounting component 76b of the child seat 24 therein and each second seat mount 116a, 116b may include a laterally extending recess or groove configured to receive another mounting component, such as the first mounting component 76a of the child seat 24 therein.

[0063] It should be appreciated that at least one of the front and rear seat mounts 114a, 114b, 116a, 116b, includes a receiving component operable to selectively restrict separation of a mounting component from the recess of the seat mount. For example, a receiving component 120b associated with the second front seat mount 114b and a receiving component 120d associated with the second rear seat mount 116b are illustrated in FIG. 8. However, it should be understood that the receiving components associated with the second front seat mount 114b and the second rear seat mount 116b may have a substantially identical configuration. With reference to FIGS. 11 A and 11B, the first rear seat mount 116a is illustrated in more detail. As shown, the first rear seat mount 116a includes a recess within which a mounting component, such as the first mounting component 76a for example, is receivable. A receiving component 120c of the first rear seat mount 116a is a lock transformable, for example rotatable about an axis, between a locked position (FIG. 11 A) and an unlocked position (FIG. 11B). Although not shown, it should be appreciated that the first front seat mount 114a may similarly include a receiving component 120a. The receiving components 120a, 120b, 120c, 120d of each seat mount 114a, 114b, 114c, 114d may be shaped to capture and securely retain a mounting component 76a, 76b of the child seat 24 when in the locked position.

[0064] As shown, a biasing member 121c is operably coupled to the receiving component 120c and is operable to bias the receiving component 120c toward the locked position (FIG. 11 A). It should be appreciated that although only the biasing member 12c associated with the receiving component 120c of the first rear seat mount 116a is illustrated, a respective biasing member may be associated with each receiving component 120a, 120b, 120c, 120d to bias the receiving components 120a, 120b, 120c, 120d toward the locked position. The receiving components 120a, 120b may be transformable from the locked position (FIG. 11B) to the unlocked position (FIG. 11 A) in response to operation of an actuator (not shown) operably coupled to each receiving component 120a, 120b, 120c, 120d.WIA0336PCT (AP-24184-3520-WO000)

[0065] The movable portion of the energy absorbing mechanism 100 further includes at least one linkage, such as linkages 130a, 130b, 130c, 130d connecting the lower, first frame 102 and the upper, second frame 108. In the illustrated, non-limiting embodiment, the energy absorbing mechanism 100 includes a plurality of linkages, such as a linkage associated with each respective seat mount 114a, 114b, 116a, 116b for example (e.g., a first linkage 130a associated with the first front seat mount 114a, a second linkage 130b associated with the second front seat mount 114b, a third linkage 130c associated with the first rear seat mount 116a and a fourth linkage 130d associated with the second rear seat mount 116b). However, it should be understood that embodiments including a single linkage, two linkages, three linkages, or more than four linkages are also contemplated herein.

[0066] Each linkage 130a, 130b, 130c, 130d may be connected to the first frame 102 at a first anchor location and may be connected to the second frame 108 at a second anchor location. In the illustrated, non-limiting embodiment, linkage 130a is connected to the first frame 102 at a first anchor location and is connected to the second frame 108 at a second anchor location, linkage 130b is connected to the first frame 102 at another first anchor location and is connected to the second frame 108 at another second anchor location, linkage 130v is connected to the first frame 102 at another first anchor location and is connected to the second frame 108 at another second anchor location, and linkage 130d is connected to the first frame 102 at another first anchor location and is connected to the second frame 108 at another second anchor location. Accordingly, the linkages 130a, 130b, 130c, 130d may be connectable to the first frame 102 at a plurality of first anchor locations and the linkages 130a, 130b, 130c, 130d may be connectable to the second frame 108 at a plurality of second anchor locations. The first and second anchor locations will be described in more detail below.

[0067] Each of the plurality to linkages 130a, 130b, 130c, 130d may be formed from a rigid material. Each of the plurality to linkages 130a, 130b, 130c, 130d includes a respective link arm 134a, 134b, 134c, 134d. In an embodiment, the link arms 134a, 134b, 134c, 134d are formed from a metal material, such as steel for example. However, embodiments where the link arms 134a, 134b, 134c, 134d are formed from another suitable material, such as an energy absorbing material as described in further detail below, are also contemplated herein. The first end 136a, 136b, 136c, 136d of each link arm 134a, 134b, 134c, 134d may be coupled to the first frame 102 and a second end 138a, 138b, 138c, 138d of each link arm 134a, 134b, 134c, 134d may be coupled to the second frame 108. The second endWIA0336PCT (AP-24184-3520-WO000)138a, 138b, 138c, 138d of each link arm 134a, 134b, 134c, 134d maybe coupled to the second frame 108 at a respective second anchor location.

[0068] The upper, second end 138a, 138b, 138c, 138d of each link arm 134a, 134b, 134c, 134d may be pivotally coupled to the second frame 108. In an embodiment, the first link arm 134a and the third link arm 134c are pivotally connected to the first lateral upper frame member 110a and the second link arm 134b and fourth link arm 134d are pivotally connected to the second lateral upper frame member 110b. As shown, the link arm 134a, 134b, 134c, 134d may be coupled to the upper second frame 108 at a position offset from a respective seat mount 114a, 114b, 116a, 116b. In an embodiment, the link arms 134c, 134d associated with the rear seat mounts 116a, 116b are positioned generally forward of the rear seat mounts 116a, 116b relative to a longitudinal axis of the upper second frame 108 and the link arms 134a, 134b associated with the front seat mounts 114a, 114b are positioned generally rearward of the front seat mounts 114a, 114b. Accordingly, each of the plurality of linkages 130a, 130b, 130c, 130d may be connected to the second frame 108 at a position between the plurality of seat mounts 114a, 114b, 116a, 116b.

[0069] In an embodiment, at least one, and in some embodiments, each of the plurality of linkages 130a, 130b, 130c, 130d additionally includes a torsion bar 140a, 140b, 140c, 140d. In such embodiments, the torsion bars 140a, 140b, 140c, 140d may be used to mount a corresponding link arm 134a, 134b, 134c, 134d to the first frame 102 such that the link arms 134a, 134b, 134c, 134d are indirectly mounted to the first frame 102 by the torsion bars 140a, 140b, 140c, 140d. As shown, the first link arm 134a may be connected to a first torsion bar 140a, the second link arm 134b may be connected to a second torsion bar 140b, the third link arm 134c may be connected to a third torsion bar 140c, and the fourth link arm 134d may be connected to a fourth torsion bar 140d. However, embodiments where the first and second link arms 134a, 134b associated with the front seat mounts 114a, 114b are connected to the same torsion bar and / or embodiments where the third and fourth link arms 134c, 134d associated with the rear seat mounts 116a, 116b are connected to the same torsion bar are also within the scope of the disclosure.

[0070] Each torsion bar 140a, 140b, 140c, 140d may be connected to a respective lateral frame member 104a, 104b located proximate the link arm 134a, 134b, 134c, 134d associated therewith. The connections formed between each torsion bar 140a, 140b, 140c, 140d and the first frame 102 may form a plurality of first anchor locations. For example, the first torsion bar 140a and the third torsion bar 140c may be mounted to the first lateral lower frame member 104a and the second torsion bar 140b and the fourth torsion bar 140d may beWIA0336PCT (AP-24184-3520-WO000)mounted to the second lateral lower frame member 104b. In an embodiment, adjacent linkages 130a, 130b, 130c, 130d are coaxially mounted. The torsion bars 140a, 140b of the linkages 130a, 130b associated with the front seat mounts 114a, 114b may be coaxial and the torsion bars 140c, 140d of the linkages 130c, 130d associated with the rear seat mounts 116a, 116b may be coaxial. Accordingly, each torsion bar 140a, 140b, 140c, 140d may extend over only a portion of a width defined between the lateral lower frame members 104a, 104b.

[0071] An end of the torsion bars 140a, 140b, 140c, 140d, such as located proximate the first lateral lower frame member 104a or the second lateral lower frame member 104b for example, may include an anchor 142a (not shown), 142b, 142c, 142d. Each anchor 142a, 142b, 142c, 142d may be fixedly connected to the lateral lower frame member 104a, 104b, such as via a weld, mechanical fastener, or another suitable connection mechanism.Accordingly, the anchors 142a, 142b, 142c, 142d may define the first anchor locations. In such embodiments, the torsion bars 140a, 140b, 140c, 140d are not freely rotatable relative to the first frame 102. Further, the first end 136a, 136b, 136c, 136d of each link arm 134a, 134b, 134c, 134d may be rotatably fixed to a respective torsion bar 140a, 140b, 140c, 140d. In an embodiment, the link arms 134a, 134b, 134c, 134d are integrally formed with the torsion bars 140a, 140b, 140c, 140d. Accordingly, the linkages 130a, 130b, 130c, 130d are freely rotatable relative to the second frame 108, but are not freely rotatable relative to the first frame 102.

[0072] In an embodiment, the torsion bars 140a, 140b, 140c, 140d are formed from an energy absorbing material, engineered to dissipate kinetic energy through deformation, fracture, or viscoelasticity. An example of such an energy absorbing material is an aluminum honeycomb designed to deform in response to an impact force acting on the linkages 130a, 130b, 130c, 130d. In an embodiment, the energy absorbing material of the linkages 130a, 130b, 130c, 130d is more likely to deform in response to a crash event than both the first frame 102 and the second frame 108.

[0073] The energy absorbing mechanism 100 is configured to initially resist movement of the linkages 130a, 130b, 130c, 130d. However, each linkage 130a, 130b, 130c, 130d may also be configured to deform under crash loads. During a crash event, the connection of the linkages 130a, 130b, 130c, 130d with the first frame 102 and second frame 108 may allow for a limited movement of the child seat 24 in the direction of a crash force. In the illustrated, non-limiting embodiment, a crash force F (see FIG. 4A) is exerted on the child seat 24 in a forward direction oriented toward a front of the vehicle for example. This crash force F is transmitted to the linkages 130a, 130b, 130c, 130d, specifically to the link armsWIA0336PCT (AP-24184-3520-WO000)134a, 134b, 134c, 134d thereof, via the upper, second frame 108 of the energy absorbing mechanism 100.

[0074] Because the linkages 130a, 130b, 130c, 130d are rotationally fixed relative to the first frame 102, the forward force acting on second end 138a, 138b, 138c, 138d of each link arm 134a, 134b, 134c, 134d generates a respective torque load at the torsion bar 140a, 140b, 140c, 140d of each linkage 130a, 130b, 130c, 130d. As shown, the torque load is oriented about the longitudinal axis of each torsion bar 140a, 140b, 140c, 140d, resulting in a twisting of the torsion bars 140a, 140b, 140c, 140d about their longitudinal axes. If the torque load acting thereon exceeds an energy absorption threshold of the torsion bars 140a, 140b, 140c, 140d, each torsion bar 140a, 140b, 140c, 140d will begin to twist about its respective longitudinal axis relative to the first frame member 102. This twisting results in deformation of the torsion bars 140a, 140b, 140c, 140d and a corresponding movement of the link arms 134a, 134b, 134c, 134d in the forward direction (see FIGS. 4B and 8). The deformation of the torsion bars 140a, 140b, 140c, 140d absorbs energy, thereby reducing the peak acceleration and the energy transferred to the occupant of the child seat 24. In an embodiment, the deformation of the linkages 130a, 130b, 130c, 130d is plastic and therefore permanent.However, embodiments where the linkages 130a, 130b, 130c, 130d are designed such that the deformation is elastic are also within the scope of the disclosure.

[0075] In an embodiment, at least one capture or rebound member 150 is movably coupled to one or more of the link arms 134a, 134b, 134c, 134d. An example of such a rebound member 150 is illustrated in more detail in FIGS. 9A and 9B. Although only a single rebound member 150 is illustrated and connected to the first link arm 134, it should be appreciated that any or all of the link arms 134a, 134b, 134c, 134d may have a substantially identical rebound member. As shown, the rebound member 150 may be pivotably coupled to the link arm 134a, such as at a position proximate a surface of the link arm 134a facing an adjacent lower frame cross-member 106b. The rebound member 150 may be rotatable relative to the link arm 134a between a retracted position (FIG. 9A), in which the rebound member 150 is arranged within or in overlapping arrangement with the body of the link arm 134a, and an extended position (FIG. 9B) in which the rebound member 150 protrudes beyond the body of the link arm 134a, toward the adjacent lower frame cross-member 106b.

[0076] A biasing member 152 may be operably coupled to the rebound member 150 and the biasing force of the biasing member 152 may bias the rebound member toward the extended position. When the energy absorbing mechanism 100 is in the first configuration, such as when no crash forces are acting on the energy absorbing mechanism 100, the reboundWIA0336PCT (AP-24184-3520-WO000)member 150 is in the retracted position. In the first configuration, a surface of the link arm 134a is located proximate to or in engagement with the adjacent lower frame cross-member 106b. Engagement between the lower frame cross-member 106b and the rebound member 150 opposes the biasing force of the biasing member 152, thereby restricting movement of the rebound member 150 from the retracted position.

[0077] The energy absorbing mechanism 100 is transformable from the first, unoperated configuration (FIGS. 4A, 5, 6, 7) to a second, operated configuration (FIGS. 4B and 8) in response to application of a crash force F to the infant car seat 24. In the second, operated configuration, the second frame 108 is translated relative to the first frame 102 as a result of the deformation of the linkages 130a, 130b, 130c, 130d. With this deformation of the linkages 130a, 130b, 130c, 130d, the distance between the link arm 134a and the adjacent lower frame cross-member 106b increases, thereby reducing the force acting on the rebound member 150. Accordingly, as the link arm 134a twists away from the lower frame crossmember 106b, the biasing member 152 biases the rebound member 150 toward the extended position to maintain engagement between the rebound member 150 and the adjacent lower frame cross-member 106b. This engagement prevents or at least mitigates bounding or rebounding motion of the child seat 24.

[0078] With reference now to FIG. 10, in an embodiment, one or more of the linkages 130a, 130b, 130c, 130d may be designed to have a first or preliminary connection and corresponding preliminary deformation stage and a secondary connection and corresponding secondary deformation stage. In the illustrated, non-limiting embodiment, at least one of the plurality of linkages 130a, 130b, 130c, 130d has a preliminary connection formed with the first frame 102. For example, one or both of the link arms 134c, 134d of the linkages 130c, 130d associated with the rear seat mounts 116a, 116b may include a protrusion 160c, 160d positionable in contact with an upper surface 162 of an adjacent lateral lower frame crossmember 106a of the first frame 102. These protrusions 160c, 160d may be mechanically or chemically connected to a surface, such as the surface 162 of the first frame 102, to form preliminary connections that further restrict movement of the linkages 130c, 130d relative to the first frame 102. The preliminary connections between the protrusions 160c, 160d and the lateral lower frame cross-member 106a have an initial rigidity and resistance to motion between the lower frame 102 and upper frame 108, such as in response to a crash force F acting on the child seat 24 in a forward direction.

[0079] When the crash force F acting on the child seat 24 exceeds a first threshold of the preliminary connections, the preliminary connections between the protrusions 160c, 160dWIA0336PCT (AP-24184-3520-WO000)and the lateral lower frame cross-member 106a are damaged or destroyed. This destruction of the preliminary connection between each protrusion 160c, 160d and a corresponding lateral lower frame cross-member 106a may be the first deformation stage. In an embodiment, the protrusions 160c, 160d are designed to break away from either the lateral lower frame crossmember 106a or the link arm 134c, 134d in response to a force exceeding the first threshold. For example, the protrusions 160c, 160d may be sheared from the surface 162 of the lateral lower frame cross-member 106a. It should be understood that the crash force F may be sufficient to damage the interface between the frame 102 and the protrusions 160c, 160d without deforming the corresponding torsion bars 140c, 140d.

[0080] With the preliminary connections broken and the crash force F acting on the child seat 24 exceeding a second threshold, greater than the first threshold, the moment or rotational torque load generated at the torsion bar 140a, 140b, 140c, 140d of each linkage 130a, 130b, 130c, 130d will cause the linkages 130a, 130b, 130c, 130d to bend and deform relative to the first frame 102. This second deformation stage results in a limited forward movement of the second frame 108, and therefore the child seat 24 connected to the second frame 108, relative to the first frame 102.

[0081] With continued reference to FIG. 10 and further reference to FIG. 12, a graph representing the stress-strain curve for an example material for the torsion bar 140a, 140b, 140c, 140d when a torque load is applied. Application of the crash force F to the infant car seat 24 exceeding the first threshold and the resulting first deformation stage includes a large increase in the stress acting on the energy absorption assembly 100. This first deformation stage, represented by the change in stress between points A and B on the graph, may result in an initial hard deceleration of the infant car seat 24.

[0082] The second deformation stage is represented on the graph between points B and C. The torsion bars 140a, 140b, 140c, 140d may be designed such that the stress acting on the energy absorption assembly 100 during the second deformation stage may be generally constant over a range of strains (and, potentially, over an extended period of time) compared to the first deformation stage. In an embodiment, the stress on the energy absorption assembly 100 during the second deformation stage may be generally less than the maximum stress on the energy absorption assembly 100 during the first deformation stage. The uniform stress experienced during the second deformation stage when the torsion bars 140a, 140b, 140c, 140d bend and deform may result in a generally linear, consistent, or constant deceleration that allows kinetic energy to be dissipated at a safe rate for an occupant of the child seat 24. Additionally, the second deformation stage may constitute a longer amount ofWIA0336PCT (AP-24184-3520-WO000)time that crash forces are transferred to the child seat 24 than for a system that does not include the energy absorption assembly 100, which may improve crash test performance and safety of the child occupant.

[0083] With reference now to FIGS. 13A-15B, another example of a child seat system 220 is illustrated according to an embodiment. The child seat system 220 includes a support base 222 that can be detachably fixed to a vehicle seat 210 such as via a latch or anchor system, sometimes referred to as a “lower anchor and tether for children” e.g., LATCH system including one or more anchors 221. Alternatively, or in addition, the support base 222 may be detachably fixed to a vehicle seat 210 via a vehicle belt associated with the vehicle seat 210.

[0084] As in the previous embodiment, the child seat system 220 includes a rigid child seat 224 connected to the support base 222. In an embodiment, the child seat 224 is detachably coupled to the support base 222, thereby allowing the child seat 224 to be separated from the support base 222. Alternatively, the support base 222 and the child seat 224 may be permanently connected or affixed together. As used herein the term “permanently connected” represents embodiments where the child seat 224 is not intended to be disassembled from the support base 222 by a user.

[0085] The child seat 224 may include a seat shell 225 having a seat back portion 226 and a seat pan portion 228 arranged at an angle relative to the seat back portion 226. The seat back portion 226 and the seat pan portion 228 may be detachably coupled, or alternatively, may be permanently coupled. In the illustrated, nondimiting embodiment, the seat back portion 226 and the seat pan portion 228 are integrally formed as a single unitary body. In another alternative aspect, the seat back portion 226 can be rotationally connected to the seat pan portion 228 such that the seat back portion 226 can incline and recline relative to the seat pan portion 228.

[0086] As shown, the seat back portion 226 of the child seat 224 includes an upright support surface 230 generally facing forward and that extends from a first end or top 232 to a second, opposite end or bottom 234 of the seat back portion 226. A first upright side member 236 may be arranged at a first side 238 of the upright support surface 230 and a second upright side member 240 may be arranged at a second, opposite side 242 of the upright support surface 230. The first and second upright side members 236, 240 therefore form the left side and the right side of the seat back portion 226, respectively. As shown, the first and second upright side members 236, 240 extend forward from the upright support surface 230. The first and second upright side members 236, 240 may extend generally orthogonally to the upright support surface 230 or alternatively, may extend therefrom at another angle, such as an angle greaterWIA0336PCT (AP-24184-3520-WO000)than 90° for example. Accordingly, the upright support surface 230 and the first and second upright side members 236, 240 define a backrest region or upright support cavity 244 within which an upper body of a child is received.

[0087] The seat pan portion 226 includes a seat support surface 250 facing generally upwardly and that extends from a first end or front 252 to a second end or back 254 of the seat pan portion 228. A first seat side member 256 may be arranged at a first side 258 of the seat support surface 250 and a second seat side member 260 may be arranged at a second, opposite side 262 of the seat support surface 250. The first seat side member 256 and the second seat side member 260 extend upwardly and from the left side and the right side of the seat portion. The seat support surface 250 and the first and second seat side members 256, 260 in combination define a region 264 within which at least part of a lower body of a child may be received.

[0088] As shown, the first and second seat side members 256, 260 extend at an angle from the seat support surface 250. The angle of the first seat side member 256 relative to the seat support surface 250 may but need not be the same as the angle of the first upright side member 236 relative to the upright support surface 230. Similarly, the angle of the second seat side member 260 relative to the seat support surface 250 may but need not be the same as the angle of the second upright side member 240 relative to the upright support surface 230. In an embodiment, the first upright side member 236 and the first seat side member 256 are integrally formed and the second upright side member 240 and the second seat side member 260 are integrally formed.

[0089] The support base 222 for mounting the child seat 224 includes base body 270 having a base seat portion 272 and a base back portion 274. Suitable materials for making the base body 270 include but are not limited to rigid plastic or composite materials for example. The base seat portion 272 and the base back portion 274 may be integrally formed as a unitary body, or alternatively, may be formed by separate components removably or permanently connected together. With reference to FIGS. 13 A and 13B, in the illustrated, non-limiting embodiment, the support base 222 includes a first base member 276 having a bottom surface 278 suitable for placement on a support surface, such as a vehicle seat 210 for example, and a second base member 280 coupled to the first base member 276. In the illustrated, non-limiting embodiment, at least a portion of the second base member 280 is positioned in overlapping arrangement with an upper surface (not shown) of the first base member 276. In the embodiments shown in FIGS. 13 A and 13B., the base back portion 274 of the support base 222 is formed solely by the second base member 280, and the base seat portion 272 of the supportWIA0336PCT (AP-24184-3520-WO000)base 222 is formed by the first base member 276 and the second base member 280, in combination.

[0090] As shown, the child seat 224 may be affixed directly to the second base member 280. With continued reference to FIGS. 13A-13B and further reference to FIGS. 14A-15B, the second base member 280 may include a rigid frame 282 arranged within an outer housing.

[0091] The child seat 224 may be rotatable relative to the support base 222 between a plurality of configurations. In an embodiment, the child seat 224 is rotatable relative to both the first and second base members 276, 280 of the support base 222. As shown in the FIGS., the child seat 224 is rotatable between a first rotational configuration, such as a configuration in which the child seat 224 is in a facing-forward position (FIGS. 13A-14B), and a second rotational configuration, such as a configuration in which a child seat 224 is in a rearwardfacing position (FIGS. 15A-15B). However, it should be appreciated that embodiments where the child seat 224 is positionable in one or more additional configurations between the first rotational configuration and a second rotational configuration are also within the scope of the disclosure.

[0092] In the illustrated, non-limiting embodiment, the child seat system 220 includes an energy absorbing mechanism 300. The energy absorbing mechanism 300 may be mounted within the base body 270 and the child seat 224 may be operably coupled thereto via the connection between the child seat 224 and the support base 222. The energy absorbing mechanism 300 may include a movable portion and a fixed portion substantially identical to the energy absorbing mechanism 100 previously described with reference to FIGS. 1-10. Accordingly, the fixed portion includes a first frame 302, the movable portion includes a second frame, and the two frames are coupled by a plurality of linkages 330a, 330b, 330c, 330d. As shown, the anchors 221 of the LATCH system may be connected to or form a portion of the first frame 302. Each linkage 330a, 330b, 330c, 330d may include a respective link arm 334a, 334b, 334c, 334d and torsion bar 340b, 340c (not shown), 340d (not shown) as previously described. However, in the illustrated, non-limiting embodiment, the rigid second frame of the movable portion is formed by the rigid frame 282 of the second base member 280 at the base seat portion 272.

[0093] During a crash event, the plurality of linkages 330a, 330b, 330c, 33 Od connecting the rigid frame 282 to the first fixed frame 302, are configured to deform as previously described. This deformation allows for a limited movement of the child seat 224, and therefore the second base member 280 relative to the first base member 276 in a forward direction oriented toward a front of the vehicle for example. The crash force F applied to theWIA0336PCT (AP-24184-3520-WO000)child seat 224 is transmitted to the linkages 330a, 330b, 330c, 330d, via the rigid frame 282 of the support base 222. Because the linkages 330a, 330b, 330c, 330d are rotationally fixed relative to the first frame 302 via the torsion bars 340a, 340b, 340c (not shown), 340d (not shown), the forward force acting on linkages 330a, 330b, 330c, 33 Od generates a respective torque at the torsion bars 340a, 340b, 340c (not shown), 340d (not shown) resulting in a twisting of the linkages 330a, 330b, 330c, 330d. This twisting deforms the torsion bars 340a, 340b, 340c (not shown), 340d (not shown and results in a corresponding movement of the link arms 334a, 334b, 334c, 334d in the forward direction. The deformation of the linkages 330a, 330b, 330c, 330d absorbs energy, thereby reducing the peak acceleration and the energy transferred to the occupant of the child seat 224.

[0094] An energy absorbing mechanism 100, 300 as described herein may improve crash performance, including frontal and / or side impact crash testing, in one or both of a rearfacing mode and a front-facing mode. The energy absorbing mechanism 100, 300 may be configured to absorb, redirect, and / or dissipate energy from a crash force impact, such as via deformation of the energy absorbing mechanism 100, 300.

[0095] The term “about” is intended to include the degree of error associated with measurement of the particular quantity based upon the equipment available at the time of filing the application. As used herein, the term “substantially” and derivatives thereof, and words of similar import, when used to describe a size, shape, orientation, distance, spatial relationship, or other parameter includes the stated size, shape, orientation, distance, spatial relationship, or other parameter, and can also include a range up to 10% more and up to 10% less than the stated parameter, including 5% more and 5% less, including 3% more and 3% less, including 1% more and 1% less.

[0096] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used herein, the singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and / or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, element components, and / or groups thereof.

[0097] While the present disclosure has been described with reference to an exemplary embodiment or embodiments, it will be understood by those skilled in the art that various changes may be made, and equivalents may be substituted for elements thereof withoutWIA0336PCT (AP-24184-3520-WO000)departing from the scope of the present disclosure. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the present disclosure without departing from the essential scope thereof. Therefore, it is intended that the present disclosure not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this present disclosure, but that the present disclosure will include all embodiments falling within the scope of the claims.

Claims

WIA0336PCT (AP-24184-3520-WO000)What is claimed is:

1. A child seat system installable on a vehicle seat, the child seat system comprising: a first portion affixable to the vehicle seat;a second portion for receiving an occupant;an energy absorbing mechanism connected to the first portion at at least one first anchor location and connected to the second portion at at least one second anchor location; and wherein the energy absorbing mechanism is configured to transform a crash force into a torque load, the energy absorbing mechanism being deformable in response to the torque load to dissipate energy.

2. The child seat system of claim 1, wherein the at least one second anchor location is vertically offset from the at least one first anchor location.

3. The child seat system of claim 1, wherein the at least one second anchor location is offset from the at least one first anchor location in a plane orthogonal to an axis extending between a front and rear of the child seat system.

4. The child seat system of claim 1, wherein the energy absorbing mechanism includes at least one linkage, the at least one linkage being deformable in response to the torque load to dissipate the energy.

5. The child seat system of claim 1, wherein deformation of the at least one linkage in response to the torque load is plastic.

6. The child seat system of claim 4, wherein the at least one linkage is connected to the first portion at the at least one first anchor location and is connected to the second portion at the at least one second anchor location.

7. The child seat system of claim 6, wherein the at least one linkage includes a plurality of linkages, the at least one first anchor location includes a plurality of first anchor locations and the at least one second anchor location includes a plurality of second anchor locations, each linkage of the plurality of linkages is connected to the first portion at a respective first anchor location of the plurality of first anchor locations and is connected to the second portion at a respective second anchor location of the plurality of second anchor locations.

8. The child seat system of claim 4, wherein the at least one linkage includes:a link arm; anda torsion bar, the torsion bar being connected to the first portion at the at least one first anchor location and the link arm being connected to the second portion at the at least one second anchor location.WIA0336PCT (AP-24184-3520-WO000)9. The child seat system of claim 8, wherein the link arm extends orthogonally from the torsion bar.

10. The child seat system of claim 8, wherein the link arm is rotatably fixed to the torsion bar.

11. The child seat system of claim 8, wherein the link arm is integrally formed with the torsion bar.

12. The child seat system of claim 8, wherein the at least one linkage is connected to the first portion via a preliminary connection and a secondary connection.

13. The child seat system of claim 12, wherein the link arm is connected to the first portion at the preliminary connection and the torsion bar is connected to the first portion at the secondary connection.

14. The child seat system of claim 12, wherein the at least one linkage is deformable at the preliminary connection in response to the crash force exceeding a first threshold and is deformable at the secondary connection when the crash force exceeds a second threshold.

15. The child seat system of claim 14, wherein the at least one linkage is deformable at the secondary connection only after deformation of the preliminary connection.

16. The child seat system of claim 4, wherein the at least one linkage is pivotally coupled to the second portion and is fixedly coupled to the first portion.

17. The child seat system of claim 1, wherein the second portion includes a child seat.

18. The child seat system of claim 17, wherein the child seat is positionable in a forwardfacing configuration relative to the first portion.

19. The child seat system of claim 17, wherein the child seat is positionable in a rearwardfacing configuration relative to the first portion.

20. The child seat system of claim 17, wherein the child seat is an infant car seat.

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