Child safety seat with an anti-rebound support

Abstract: This invention relates to a child safety seat 10 for use in a vehicle seat 18. The child safety seat 10 has an anti-rebound protection. The safety seat 10 comprises a seat and back rest portion 11 and 12 for seating an infant, at least one base member 19 on the safety seat 10 that supports it when placed on a surface such as a vehicle seat and an anti-rebound support 20 attached to the safety seat 10 so that when the safety seat 10 is used in a rearward direction on a vehicle seat 18 the anti-rebound support 20 is moved to a first position where it extends above the seat portion 12 of the child safety seat 10 and abuts against the backrest of the vehicle seat 18 thereby restraining rebound movement. The anti-rebound support 20 is movable to a second position where it is stowed beneath the safety seat 10 so that it is clear of the base member 19 and any surface that the base member 19 is resting on. The advantage of the invention is that the anti-rebound support 20 is fully stowed or retracted under the safety seat 10 when not in use.

Description: This invention relates to a child safety seat for use on a vehicle seat comprising a seat portion and a backrest portion for seating an infant, at least one base member on the safety seat that supports it when placed on a support surface such as the vehicle seat, and a support having an end portion and a side arm by which its end portion is attached to the safety seat so that the support is movable between a first position and a second position, the end portion abutting against the backrest of the vehicle seat when the support is in its first position when the safety seat is used in a rearward facing direction on a vehicle seat, and the anti-rebound support being stowed beneath the seat portion when in its second position so that it is clear of the support surface and the safety seat is substantially supported by the base member when the safety seat is used in a forward facing direction on a vehicle seat. Seats of this type are oriented in the rearward facing direction when used by infants from birth to approximately six months of age. In this arrangement, an infant's back is positioned in the direction of travel so that during collision, impact forces are absorbed through the backrest of the child safety seat. For older children, such a seat is oriented so that the child is facing forward in the direction of travel. Since the anti-rebound support is stowed or retracted under the safety seat to such an extent that it is not located between the base member and the surface on which it rests, it does not prevent the base member from properly locating on any surface upon which it is placed. US-A-4 743 064 discloses a child safety seat of this type in which an edge of the seat portion of the child safety seat engages with the backrest of the vehicle seat. The support engages with the backrest of the vehicle seat at a lower location. This arrangement serves to counter the tendency of a rearward facing seat to rotate quickly towards the backrest of the vehicle seat either as a result of a rear impact or as a consequence of rebound after a front end collision. This can cause great danger of injury to an infant either within the seat or as a result of the infant being thrown with force against the vehicle seat backrest. However, the efficacy of this arrangement is limited by the height at which the seat portion of the child safety seat engages with the backrest of the vehicle seat. US-A-4 613 188 discloses a child safety seat having a support intended to reduce rotation which engages with the vehicle seat back above the seat portion of the child safety seat when facing rearwardly. However the support projects below the base member when the safety seat is used in a forward facing direction on a vehicle seat. According to the invention, in a child safety seat of the type described above, the end portion of the support is formed at an angle to the side arm such that the end portion abut against the backrest of the vehicle seat above the seat portion of the child safety seat to thereby restrain rebound when the support is in its first position. Preferably, the anti-rebound support may be pivotally attached to the safety seat, but it may also be located within a slot which enables either rotation and sliding movement, or simply sliding movement, of the anti-rebound support. Preferably, the anti-rebound support comprises a U-shaped tubular metal component, the ends of which are pivotally attached to a portion of the child safety seat. However, the anti-rebound support may comprise also a plate-like element also pivotally attached to the child safety seat. In the case of a U-shaped tubular metal component, the pivotal attachment may be on portions of the child safety seat that form a frame member below the seat portion, or side gusset portions extending between the seat and back rest portions. The U-shaped tubular metal member may be extended vertically above the seat portion to provide the anti-rebound facility, and will also conveniently locate beneath the seat portion so that it is fully recessed within the base of the child safety seat when used in either the forward facing direction or as a cradle. When moved into the first position where the anti-rebound support extends above the seat portion, its rotation may be limited by stops or abutment surfaces formed on the base of the seat portion of the safety seat. In this way, the anti-rebound support is held between the back rest of the vehicle seat, and the abutment surfaces of the base of the child safety seat. BRIEF DESCRIPTION OF THE DRAWINGS In order for the invention to be fully understood, preferred embodiments will now be described. However, it should be realised that the invention is not to be limited or confined to the details of each of these embodiments. The embodiments are illustrated in the accompanying representations in which: Figs 1 and 1a show a child safety seat in both rearward and forward facing positions respectively, Figs 2 and 2a show a child safety seat in both rearward and forward facing positions respectively. Figs 3 and 3a show a child safety seat in both rearward and forward facing positions respectively, Figs 4 and 4a show a child safety seat in both rearward and forward facing positions respectively, DETAILED DESCRIPTION OF THE INVENTION In all of the embodiments shown in the accompanying illustrations, the child safety seat 10 comprises a back rest portion 11 and a seat portion 12. The safety seat 10 is manufactured from a unitary plastic moulding, in which the back rest and seat portions 11 and 12 are formed with side walls 13, a pair of back ribs 14 which extend along the back rest portion 11, and a pair of base ribs 15. The back and base ribs 14 and 15 are connected. The edges 16 of the side walls 13 are curved in cross section and extend along the length of the side wall 13 from the base rib 15 to the top of the back rib 14. The safety seat 10 is provided with various apertures for fixing vehicle seat belts 17 to enable the safety seat 10 to be secured to a vehicle seat 18. The safety seat 10 in these embodiments has a pair of base members 19 and 19a. In the rear facing position, as shown in Fig 1, the base member 19, which is formed by the junction between the back and base ribs 14 and 15, rests on the vehicle seat 18. In the forward facing position, shown in Fig 1a, base member 19a, which is formed by the base ribs 15, rests on the vehicle seat 18. In the case of a safety seat 10 used only in a rear facing position, only one base member 19 would be needed. In this case, base member 19 would support the safety seat on any other surface upon which it may be placed. In this embodiment, the anti-rebound support comprises a generally U-shaped bar 20 having a pair of side arms 22 and ends 21. The ends 21 are formed at 90° to the side arms 22 and are pivotally attached to the base ribs 15. The pair of ends 21 on either side of the U-shaped frame 20 pivotally locate to the outside surface of each of the base ribs 15. In Fig 1, the U-shaped bar 20 is in its first position where it extends above the end of the base ribs 15 and is positioned against the back rest portion of the vehicle seat 18. This provides support to restrain anti-clockwise rotation of the child safety seat 10. In the position shown in Fig 1, the U-shaped bar 20 is restrained from further clockwise rotation by abutting against the safety seat 10. It is of course prevented from anti-clockwise rotation by being located against the back rest portion of the vehicle seat 18. As seen in Fig 1a, the U-shaped bar 20 can be rotated to a second position where it locates beneath the seat when the child safety seat 10 is used in a forward facing position. A recess 23 is provided in each of the base ribs 15 within which the U-shaped bar 20 locates so that it is not between the base ribs 15 and the seat portion of the vehicle seat 18 as shown in Fig 1a. The embodiment shown in Figs 2 and 2a incorporates a base support 25 to which the safety seat 10 is attached. The safety seat 10 is able to move with respect to the base support 25 to adopt a different position with respect to the base support 25 for both the rearward and forward facing positions. In this embodiment, the U-shaped bar 20 is pivotally attached to the base support 25, and is arranged to rotate underneath and within the base support 25 when used in a forward facing position as shown in Fig 2a. The embodiment shown in Figs 3 and 3a is very similar to the arrangement shown in Figs 1 and 1a. However, in this embodiment, a slot 27 is formed in each of the base ribs 15. The ends 21 of the U-shaped bar 20 are designed to slide along the slot so that the U-shaped bar 20 is either extended as shown in Fig 3, or is retracted at the other end of the slot and located beneath the base of safety seat 10 as shown in Fig 3a. Recesses 23 are provided within the base ribs 15 within which to locate the U-shaped bar 20 when in the retracted position as shown in Fig 3a. Finally, a fourth embodiment is shown in Figs 4 and 4a. In this embodiment, the ends 21 are more elongate, and are pivotally attached to the side walls 13. Minimal pivotal movement is required for locating the U-shaped bar 20 beneath the safety seat 10, and as shown in Fig 4a, recesses 23 are provided in the base ribs 15 for location therein of the U-shaped bar 20. As will be seen from each of the above descriptions, the invention provides a very simple means of providing an anti-rebound support which can be used on a child safety seat that is designed for both forward and rearward facing operation.

Claims: A child safety seat for use on a vehicle seat comprising a seat portion (12) and a backrest portion (11) for seating an infant, at least one base member (19, 19a) on the safety seat that supports it when placed on a support surface such as the vehicle seat (18), and a support (20) having an end portion and a side arm by which its end portion is attached to the safety seat so that the support (20) is movable between a first position and a second position, the end portion abutting against the backrest of the vehicle seat (18) when the support (20) is in its first position when the safety seat is used in a rearward facing direction on a vehicle seat (18), and the support (20) being stowed beneath the seat portion (12) when in its second position so that it is clear of the support surface and the safety seat is substantially supported by the base member (19, 19a) when the safety seat is used in a forward facing direction on a vehicle seat (18), characterised in that the end portion of the support (20) is formed at an angle to the side arm such that the end portion abut against the backrest of the vehicle seat (18) above the seat portion (12) of the child safety seat to thereby restrain rebound when the support (20) is in its first position. A child safety seat according to claim 1, wherein the support (20) comprises a portion that is substantially the same width as the seat portion (12) of the child safety seat. A child safety seat according to claim 1 or 2, wherein the support (20) is pivotally attached to the child safety seat so that it rotates between the first and second positions. A child safety seat according to claim 1, 2 or 3, wherein the support comprises a U-shaped bar (20) having a pair of side arms that are attached to a respective side of the seat portion (12) with a cross bar extending between the pair of side arms. A child safety seat according to claim 4, wherein the child safety seat further comprises two slots (27), one on each side of the child safety seat, to which the bar (20) is attached that allows for both sliding and rotation of the rebound bar with respect to the slots. A child safety seat according to claim 1 or 2, wherein the support (20) comprises a plate-like element. A child safety seat according to any preceding claim, wherein the support (20) is held in its first position by being positioned between an edge of the seat portion (12) and the backrest of the vehicle seat (18).

Inventors: LUMLEY MICHAEL ANDREW, LUMLEY, MICHAEL ANDREW
Applicants: BRITAX CHILD CARE PROD, BRITAX CHILD-CARE PRODUCTS PTY. LTD.
Application year: 1996
Main classification: B60N2
IPC codes: B60N2