A child seat for a vehicle which can be firmly secured to a vehicle seat even with a shoulder belt of a three-point seat belt and which can wind up the seat belt to securely apply a predetermined tension to the seat belt. The child seat includes a child seat and a shaft attached to the child seat. The shaft is rotatable about an axis of the shaft. Additionally, a first end of the shaft is disposed at a higher elevation than a second end of the shaft. The shaft further includes at least one slit configured to accept a seat belt.
1. A child seat for a vehicle, comprising:
a child seat; and
a shaft attached to the child seat;
wherein a first end of the shaft is disposed at a higher elevation than a second end of the shaft;
wherein the shaft is rotatable about an axis of the shaft,
wherein the shaft includes at least one slit configured to accept a seat belt, and
wherein the at least one slit includes a lap belt slit configured to accept a lap belt and a shoulder belt slit configured to accept a shoulder belt.
2. The child seat according to claim 1 , wherein the shoulder belt slit is disposed above the lap belt slit.
3. The child seat according to claim 1 , wherein the shoulder belt slit is disposed adjacent to the lap belt slit.
4. The child seat according claim 1 , wherein the shoulder belt slit and the lap belt slit have a common belt inlet.
5. A child seat for a vehicle, comprising:
a child seat; and
a shaft attached to the child seat;
wherein a first end of the shaft is disposed at a higher elevation than a second end of the shaft;
wherein the shaft is rotatable about an axis of the shaft,
wherein the shaft includes at least one slit configured to accent a seat belt, and
wherein the shaft extends in a vertical direction.
6. The child seat according to claim 5 , wherein the shaft is configured so that a seat belt inserted into the at least one slit winds around the shaft when the shaft is rotated.
7. A child seat for a vehicle, comprising:
a child seat; and
a drive train attached to the child seat;
wherein the drive train includes a rotatable shaft and a torque limiting device;
wherein the shaft includes at least one slit configured to accept a seat belt; and
wherein the torque limiting device is configured to prevent torque exerted on the shaft from exceeding a predetermined value.
8. The child seat according to claim 7 , wherein the shaft is configured so that a seat belt inserted into the at least one slit winds around the shaft when the shaft is rotated.
9. The child seat according to claim 7 , wherein the torque limiting device comprises a torque clutch.
10. The child seat according to claim 7 , wherein the torque limiting device comprises a torque sensor.
11. A child seat according to claim 7 , wherein the drive train further comprises a knob configured to enable a user to rotate the shaft.
12. A child seat according to claim 11 , wherein the torque limiting device prevents a torque exerted on the knob from being transmitted to the shaft when the torque exerted on the knob exceeds a predetermined value.
13. An attachment mechanism for securing a child seat to a vehicle using a seat belt, comprising:
a rotatable shaft configured to be installed on a child seat;
wherein the shaft includes at least one slit configured to accept the seat belt,
wherein the shalt is configured so that a first end of the shaft is disposed at a higher elevation than a second end of the shaft when the shaft is installed on the child seal, and
wherein the at least one slit includes a lap belt slit configured to accept a lap belt and a shoulder belt slit configured to accept a shoulder belt.
14. The attachment mechanism for securing a child seat to a vehicle using a seat belt according to claim 13 , wherein the shoulder belt slit is disposed adjacent to the lap belt slit.
15. The attachment mechanism for securing a child seat to a vehicle using a seat belt according to claim 13 , wherein the shoulder belt slit and the lap belt slit have a common belt inlet.
16. An attachment mechanism for securing a child seat to a vehicle using a seat belt, comprising:
a rotatable shaft configured to be installed on a child seat; and
a torque limiting device,
wherein the torque limiting device is configured to prevent torque exerted on the shaft from exceeding a predetermined value, and
wherein the shaft includes at least one slit configured to accept the seat belt,
wherein the shaft is configured so that a first end of the shaft is disposed at a higher elevation than a second end of the shaft when the shaft is installed on the child seat.
17. The attachment mechanism for securing a child seat to a vehicle using a seat belt according to claim 16 , wherein the torque limiting device comprises a torque clutch.
18. The attachment mechanism for securing a child seat to a vehicle using a seat belt according to claim 16 , wherein the torque limiting device comprises a torque sensor.
19. The attachment mechanism for securing a child seat to a vehicle using a seat belt according to claim 16 , further comprising a knob configured to enable a user to rotate the shaft.
20. The attachment mechanism for securing a child seat to a vehicle using a seat belt according to claim 19 , wherein the torque limiting device is configured to prevent a torque exerted on the knob from being transmitted to the shaft when the torque exerted on the knob exceeds a predetermined value.