A child seat includes a seat body having a seat portion, a backrest, and right and left side guards; and a cushion disposed on an outer side surface of the side guards. The cushion may include a gasbag filled with gas. The child seat may further include vent portion for discharging the gas in the gasbag when a gas pressure in the gasbag exceeds a predetermined pressure. When a high load is exerted on the gasbag, the gas is discharged through the vent portion, thereby absorbing a shock.
1. A child seat for protecting a child in a vehicle, comprising:
a seat body including a seat portion, a backrest, and right and left side guards, and
a cushion immovably fixed onto an outer side surface of at least one of the side guards for absorbing an impact applied thereto, said cushion including a gasbag filled with gas in advance and a vent device disposed at the gasbag, said vent device discharging the gas when a gas pressure in the gasbag exceeds a predetermined pressure due to load applied thereto so that the load applied to the seat body is absorbed by the gasbag.
2. A child seat according to claim 1 , wherein said cushion includes a plurality of cushion parts, each of said cushion parts having a hollow space therein.
3. A child seat according to claim 1 , wherein said cushion has an interior partitioned into a plurality of hollow spaces.
4. A child seat according to claim 1 , wherein said gasbag includes a local-inflation preventing device, said local-inflation-preventing device preventing a part of the cushion from locally expanding when another part of the cushion is pushed.
5. A child seat according to claim 4 , wherein said local-inflation-preventing device is a tether belt or a stay.
6. A child seat according to claim 1 , wherein said gasbag is filled with the gas in a pressure about 1.5 to 3 times higher than an atmospheric pressure.
7. A child seat for protecting a child in a vehicle, comprising:
a seat body including a seat portion, a backrest, and right and left side guards, and
a cushion immovably fixed onto an outer side surface of at least one of the side guards for absorbing an impact applied thereto, said cushion including a gasbag filled with gas in advance and a vent device disposed at the gasbag, said vent device discharging the gas when a gas pressure in the gasbag exceeds a predetermined pressure due to load applied thereto so that the load applied to the seat body is absorbed by the gasbag,
wherein said cushion further includes a cover shield covering the gasbag and having a vent hole, said gasbag being broken at a portion corresponding to the vent hole when the gas pressure in the gasbag exceeds the predetermined pressure.
8. A child seat according to claim 7 , wherein said cushion is disposed only laterally outside the seat body.
9. A child seat according to claim 1 , wherein said gasbag is broken when the gas pressure in the gasbag exceeds the predetermined pressure due to the load applied thereto.
10. A child seat according to claim 1 , wherein said gas bag is formed separately from the seat body, and one gas bag is immovably fixed laterally outside each of the right and left side guards relative to the backrest.
11. A child seat according to claim 10 , wherein said side guards extend substantially perpendicularly from entire right and left side portions of the seat portion and the backrest.