Abstract: A protective pillow comprises two symmetrical side panels connected by a back panel which define a receiving space therein for the comfortable support of the head of a user. The back panel has an orthopedically engineered front surface which closely fits the back of the head. The side panels have bottom ends which terminate into hooks by which the pillow can be fastened or attached to the user's shoulders.

Abstract: A built-up stair assembly of includes a plurality of stair units, of which the angular position of each unit stair can be flexibly adjusted horizontally as well as vertically. Each stair unit includes a T-shaped plate mounted with a tread board and having a holder plate on the top and a socket on the bottom such that the holder plate of one stair unit can be inserted in the socket of another stair unit for connection in series. A handrail is laterally mounted on the top of the tread boards of the stair units when then are connected in series.

Abstract: A vehicle internal safety belt for holding one's head to the head-rest of a vehicle internal seat or for holding one's legs together, which is comprised of two identical belt bodies connected back to back at the middle. The middle part of each belt body is formed of an elastic band so that the safety belt is permitted to flexibly extend within a certain range. Each of the two belt bodies of the safety belt has a hook strip and a loop strip at two opposite ends so that one belt body can be fastened around the head-rest of a vehicle internal seat and the other belt body can be fastened around one's head to secure one's head to the internal seat. The two belt bodies can also be reversely fastened to secure one's two legs together to prevent the legs from opening apart while one is sleeping in a seat.