Seat belt lock and car

The utility model provides a seat belt lock and car, include: the hasp, hasp slot and connection structure, the hasp includes buckle body, peg, drag link, couple and extension spring, wherein, buckle body is the cavity, lower extreme difference connected lock catch slot and automobile body on it, peg fixed connection is at the buckle body inner chamber, connection structure's both ends difference fixed connection hasp slot lower extreme and drag link, the bottom of couple is connected with the drag link, the bottom surface of drag link and buckle body inner chamber is connected respectively at extension spring's both ends, before the collision took place, the couple was hung on the peg, and extension spring is in tensile state, take place the back in the collision, extension spring continues under the exogenic action by tensile, and the couple breaks away from with the peg, extension spring shrink under the constraint that does not have couple and peg to the chest of avoiding driver and crew contacts with the steering wheel, causes the damage.