| 摘要 |
The helmet prepares the air cushioned deep part, made of hollow double structure, which can be adjusted to user head by supplying air into or discharging air from. It comprises the air cushioned deep part(20) expandable or compressible according to the air supply; ear covers(30) having a hollow double structure; and a pump(40) for supplying air for the deep part(20) and the ear covers(30). |
