Child safety seat having an adjustable seat board

1. A child safety seat for seating a child in a vehicle, comprising:

a shell having a seat portion and a backrest; and

a seat board connected with the shell, the seat board being disposed on the seat portion so that a child placed in the child safety seat sits on the seat board, the seat board being slidable relative to the shell toward or away from the backrest for adjustment between a plurality of positions, the child safety seat having a rear facing configuration of installation on a vehicle seat in which the seat board is settable to any of the positions and has a forward end in abuttal contact against a seatback of the vehicle seat, the child safety seat being configured to receive a child in a sitting position with a back of the child resting against the backrest in each of the positions of the seat board;

wherein a front surface of the backrest extending upward from the seat board to a top of the backrest is exposed in each of the positions of the seat board for receiving and supporting the back of the child sitting on the seat board.

2. The child safety seat according to claim 1 , wherein the shell has a front end, the seat board being movable between a first position where the forward end extends forward from the front end of the shell, and a second position where the seat board is retracted toward an interior of the shell.

3. The child safety seat according to claim 2 , wherein the shell has two armrests, and the seat board is retracted toward the interior of the shell between the two armrests in the second position.

4. A child safety seat for seating a child in a vehicle, comprising:

a shell having a seat portion and a backrest; and

a seat board movably connected with the shell, the seat board being disposed on the seat portion so that a child placed in the child safety seat sits on the seat board, the seat board being configurable as an extension member that is movable relative to the shell toward or away from the backrest between a plurality of positions while keeping a same angle between the seat board and the backrest for adjusting a leg room for a child sitting on the seat board, the child safety seat having a rear facing configuration of installation on a vehicle seat in which the seat board is settable to any of the positions and has a forward end in abuttal contact against a seatback of the vehicle seat;

wherein a front surface of the backrest extending upward from the seat board to a top of the backrest is exposed in each of the positions of the seat board for receiving and supporting the back of the child sitting on the seat board.

5. The child safety seat according to claim 4 , wherein the shell has a front end, the seat board being slidable between a first position where the forward end extends forward from the front end of the shell, and a second position where the seat board is retracted toward an interior of the shell, the child safety seat being configured to receive a child in a sitting position with a back of the child resting against the backrest in each of the first position and the second position of the seat board.

6. The child safety seat according to claim 4 , wherein the shell has two armrests, and the seat board is movable in a region delimited between the two armrests.

7. A child safety seat for seating a child in a vehicle, comprising:

a shell having a seat portion, a backrest, and a front end opposite to the backrest; and

a seat board movably connected with the shell and having a forward end, the seat board being disposed on the seat portion so that a child placed in the child safety seat sits on the seat board, the seat board being movable between a first and a second position while keeping a same angle between the seat board and the backrest, the forward end of the seat board extending forward from the front end of the shell in the first position, and the seat board being retracted toward an interior of the shell in the second position, the child safety seat having a rear facing configuration of installation on a vehicle seat in which the seat board is settable to any of the first and second positions and has the forward end in abuttal contact against a seatback of the vehicle seat;

wherein a front surface of the backrest extending upward from the seat board to a top of the backrest is exposed in each of the first and second positions of the seat board for receiving and supporting the back of the child sitting on the seat board.