The present invention relates to a head restraint for preventing neck injury of a driver when colliding with a rear vehicle. More particularly, the present invention relates to a head restraint caused by a collision between a driver's neck and a head rest due to a collision with a rear vehicle while driving or stopping a vehicle. It is to provide a head restraint to prevent the driver's neck injury in the event of a collision and a rear vehicle to cushion the impact of the driver's neck due to a collision of the neck of the driver and the head restraint when the driver hits the front vehicle by the running speed of the rear vehicle. In the device to prevent injuries, the inserting rod 11 of the headrest 100 is embedded therein, the fixing pad 10 is penetrated and inserted into the support 12 of the seat back, and A guide part 15 provided to be rotatable by the fixing shaft 14 of the insertion and detaching rod 11 fixed to the fixing pad 10 due to the collision of the rear vehicle, and It is fixed to the auxiliary insertion rod 11 'formed on the vertical line of the insertion and removal rod 11, and when the collision with the rear vehicle is made of a buffer box 20 in which a plurality of buffer notches 22 are embedded to cushion the impact. It is a device that cushions shock.
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