The bumper has the functions of safety protection, decorating the vehicle and improving the aerodynamic characteristics of the vehicle. In terms of safety, the vehicle can play a buffer role in case of low-speed collision accident and protect the front and rear body; It can protect pedestrians in case of accidents with pedestrians. In terms of appearance, it is decorative and has become an important part to decorate the appearance of cars; At the same time, the car bumper also has a certain aerodynamic effect.
At the same time, in order to reduce the injury to passengers in the event of a side impact accident, a door bumper is usually installed on the car to enhance the anti-collision impact force of the door. This method is practical and simple, with little change to the body structure, and has been widely used. As early as at the 1993 Shenzhen International Automobile Exhibition, Honda Accord opened a part of the door to expose the door bumper to the audience to show its good safety performance.
The installation of door bumper is to place several high-strength steel beams horizontally or obliquely in the door panel of each door, which plays the role of front and rear bumper, so that the whole car is "escorted" by bumpers at the front, rear, left and right, forming a "copper wall and iron wall", so that the car passengers have a maximum safety area. Of course, installing this kind of door bumper will undoubtedly increase some costs for automobile manufacturers, but for car passengers, the safety and sense of security will increase a lot.
