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A child restraint system includes an infant carrier and a base adapted to be mounted on a passenger seat in a vehicle in a vehicle mode. The infant carrier is also configured to be mounted on a stroller frame in a stroller mold. The infant carrier includes a seat shell and a carrying handle coupled

A child restraint system includes an infant carrier and a base adapted to be mounted on a passenger seat in a vehicle in a vehicle mode. The infant carrier is also configured to be mounted on a stroller frame in a stroller mold. The infant carrier includes a seat shell and a carrying handle coupled to the seat shell.

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1. A child restraint system comprising an infant carrier including a seat shell and a front shell anchor coupled to the seat shell and configured to include a latch plate mounted on a rim included in the seat shell for pivotable movement about a pivot axis relative to the seat shell between a shell-

1. A child restraint system comprising an infant carrier including a seat shell and a front shell anchor coupled to the seat shell and configured to include a latch plate mounted on a rim included in the seat shell for pivotable movement about a pivot axis relative to the seat shell between a shell-retaining position and a shell-releasing position anda base including a foundation adapted to set on a passenger seat in a vehicle and a front anchor holder coupled to the foundation and arranged to overlie a distal portion of the latch plate to block removal of the seat shell from a mounted position on a top surface of the foundation upon pivoting movement of the latch plate to assume the shell-retaining position while the seat shell occupies the mounted position and the rim of the seat shell engages an underlying shell-support pad included in the top surface of the foundation, whereinthe latch plate is formed to include a finger-receiving aperture,the front anchor holder includes a blocker support arranged to extend upwardly from the shell-support pad included in the top surface of the foundation through an opening formed in the rim of the seat shell when the seat shell occupies the mounted position on the top surface of the foundation and a latch-blocker arm cantilevered to the blocker support and arranged to lie in spaced-apart relation to the shell-support pad of the foundation to locate the distal portion of the latch plate therebetween when the seat shell is in the mounted position and the latch plate is in the shell-retaining position, andthe front anchor holder further includes a motion-blocking finger coupled to the latch-blocker arm and configured to extend downwardly into the finger-receiving aperture during disengagement of the rim of the seat shell from the shell-support pad in response to deformation of the seat shell when the seat shell is in the mounted position to cause the motion-blocking finger to provide lock means for engaging the latch plate to block movement of the latch plate relative to the front anchor holder from the shell-retaining position to the shell-releasing position so that the seat shell is retained in the mounted position. 2. The child restraint system of claim 1, wherein the blocker support is arranged to extend upwardly away from the shell-support pad, the latch-blocker arm is arranged to extend laterally away from the blocker support to overlie the latch plate when the latch plate occupies the shell-retaining position, and the motion-blocking finger is arranged to extend downwardly from the latch-blocker arm in a direction toward the shell-support pad. 3. The child restraint-system of claim 1, further comprising an upright flange appended to the distal portion of the latch plate and arranged to extend along the finger-receiving aperture to locate the finger-receiving aperture in a space provided between the upright flange and the pivot axis and to provide means for engaging a portion of the seat shell during deformation of the seat shell to minimize any change in the orientation of the latch plate relative to the underlying shell-support pad during deformation of the seat shell. 4. The child restraint system of claim 1, wherein the latch plate includes an edge bordering the finger-receiving aperture and the motion-blocking finger engages the edge during movement of the rim of the seat shell away from the underlying shell-support pad and toward the motion-blocking finger to block pivoting movement of the latch plate away from the shell-retaining position. 5. The child restraint system of claim 4, wherein the front shell anchor further includes a spring coupled to the latch plate and to the seat shell and configured to provide means for causing the latch plate to pivot in a clockwise direction about the pivot axis normally to move from the shell-releasing position to the shell-retaining position and the motion-blocking finger is arranged to engage a front edge in the latch plate bordering the finger-receiving aperture to provide means for blocking counterclockwise pivoting movement of the latch plate about the pivot axis in an opposite counterclockwise direction from the shell-retaining position to the shell-releasing position. 6. The child restraint system of claim 4, wherein the blocker support is arranged to extend upwardly away from the shell-support pad, the latch-blocker arm is arranged to extend laterally away from the blocker support to overlie the latch plate when the latch plate occupies the shell-retaining position, and the motion-blocking finger is arranged to extend downwardly from the latch-blocker arm in a direction toward the shell-support pad. 7. The child restraint system of claim 4, wherein the motion-blocking finger is arranged to engage a side edge in the latch plate bordering the finger-receiving aperture to provide means for blocking sliding movement of the latch plate away from the blocker support from a shell-retaining position to a shell-releasing position and the side edge is arranged to lie between the motion-blocking finger and a portion of the blocker support when the motion-blocking finger is arranged to extend into the finger-receiving aperture. 8. The child restraint-system of claim 4, further comprising an upright flange appended to the distal portion of the latch plate and arranged to extend along the finger-receiving aperture to locate the finger-receiving aperture in a space provided between the upright flange and the pivot axis and to provide means for engaging a portion of the seat shell during deformation of the seat shell to minimize any change in the orientation of the latch plate relative 9. The child restraint system of claim 4, wherein the motion-blocking finger is arranged to engage a back edge in the latch plate to provide means for blocking pivoting movement of the latch plate about the pivot axis from the shell-retaining position to the shell-releasing position. 10. The child restraint system of claim 9, wherein the latch plate includes a bar formed to include the finger-receiving aperture and an upright flange appended to the bar to locate the finger-receiving aperture between the upright flange and the pivot post and configured to include the back edge. to the underlying shell-support pad during deformation of the seat shell. 11. A child restraint system comprising an infant carrier including a seat shell having a front portion, an opposite rear portion, and a middle portion arranged to lie between the front and rear portions, the infant carrier further including a child-receiving portion arranged to extend between the front and rear portions and adapted to support a child in the infant carrier and a middle shell anchor coupled to the middle portion of the seat shell,a base including a foundation adapted to set on a passenger seat in a vehicle and to support the infant carrier in a mounted position on the base, wherein the foundation is formed to include a foundation hole defining a middle anchor holder associated with the middle shell anchor of the infant carrier, the middle shell anchor includes a slidable plunger mounted for back-and-forth sliding movement along a plunger-movement line through a channel formed in the middle portion of the seat shell and a spring arranged to urge the slidable plunger away from the child-receiving portion of the seat shell along the plunger-movement line through the channel into the foundation hole formed in the foundation when the infant carrier is supported in the mounted position on the foundation to help retain the infant carrier in a stationary position on the base in a vehicle mode for the infant carrier. 12. The child restraint-system of claim 11, wherein the infant carrier further includes a carrying handle mounted on the seat shell for pivotable movement about a handle-pivot axis arranged to extend through the middle portion of the infant carrier and the plunger-movement line is arranged to lie in spaced-apart parallel relation to the handle-pivot axis. 13. The child restraint system of claim 11, further comprising a rolling stroller frame separated from the base and adapted to support the infant carrier in a mounted position on the rolling stroller frame and to roll along the ground underlying the infant carrier, wherein the rolling stroller frame is formed to include a stroller-frame hole defining an anchor holder associated with the middle shell anchor of the infant carrier and the spring is arranged to urge the slidable plunger away from the child-receiving portion of the seat shell along the plunger-movement line through the channel into the stroller-frame hole formed in the rolling stroller frame when the infant carrier is supported in the mounted position on the rolling stroller frame to help retain the infant carrier on the rolling stroller frame in a stroller mode of the infant carrier. 14. The child restraint system of claim 13, wherein the infant carrier further includes a release handle mounted for movement relative to the seat shell and a linkage cord coupled to the release handle and to the slidable plunger and arranged to withdraw the slidable plunger from the foundation hole when the infant carrier is in the vehicle mode and from the stroller-frame hole when the infant carrier is in the stroller mode in response to movement of the release handle relative to the seat shell against a biasing force generated by the spring normally to urge the slidable plunger to move away from the child-receiving portion of the seat shell to an actuated position to free the infant carrier to be removed from the base in the vehicle mode and the rolling stroller frame in the stroller mode. 15. The child restraint-system of claim 11, wherein the foundation further includes a middle foundation portion formed to include the foundation hole defining the middle anchor holder, front foundation portion, and an opposite rear foundation portion arranged to lie in spaced-apart relation to the front foundation portion to locate the middle foundation portion therebetween, and the infant carrier further includes a front shell anchor coupled to the front portion of the seat shell and configured to mate with a companion front anchor holder formed in the front foundation portion to anchor the infant carrier to the front foundation portion when the infant carrier is in the vehicle mode and a rear shell anchor coupled to the rear portion of the seat shell and configured to mate with a companion rear anchor holder formed in the rear foundation portion to anchor the infant carrier to the rear foundation portion when the infant carrier is in the vehicle mode. 16. The child restraint-system of claim 15, wherein the rear shell anchor includes a spring-biased hook that extends into a slot formed in the rear foundation portion to define the rear anchor holder in response to a biasing force generated by a spring coupled to the rear foundation portion and to the spring-biased hook when the infant carrier is supported in the mounted position on the base to provide hook means for retaining the infant carrier in a stationary position on the base in the vehicle mode. 17. The child restraint-system of claim 16, wherein the infant carrier further includes a release handle mounted for movement relative to the seat shell and a linkage cord coupled to the release handle and to the slidable plunger and arranged to withdraw the slidable plunger from the foundation hole when the infant carrier is supported in the mounted position on the foundation in response to movement of the release handle relative to the seat shell against a biasing force generated by the spring normally to urge the slidable plunger to move away from the child-receiving portion of the seat shell to an actuated position to free the infant carrier to be removed from the base, and the linkage cord is also coupled to the spring-biased hook and arranged to withdraw the spring-biased hook from the slot formed in the rear foundation portion in response to movement of the release handle relative to the seat shell to the actuated position when it is desired to remove the infant carrier from the base.