초록 ▼

A seat belt tensioning device provided with a cylinder attached to the room of a vehicle, a piston slidably inserted into the cylinder, a rod of which one end is connected to the piston within the cylinder and of which the other end is connected to a seat belt outside of the cylinder through a joint

A seat belt tensioning device provided with a cylinder attached to the room of a vehicle, a piston slidably inserted into the cylinder, a rod of which one end is connected to the piston within the cylinder and of which the other end is connected to a seat belt outside of the cylinder through a joint member, and a piston operating means for moving the piston in one direction at an urgent time, is disclosed. The device is further provided with a piston operating energy absorbing member which is disposed between the joint member and the opposed end wall of the cylinder. When the piston moves to its limit stroke, the piston operating energy absorbing member is strongly sandwiched by the joint member and the end wall of the cylinder and is deformed by a predetermined load applied thereto to absorb the piston operating energy.

대표청구항 ▼

A seat belt tensioning device to be mounted on a vehicle, comprising: a cylinder installed within a room of the vehicle; a piston slidably inserted within said cylinder; a rod, a first end of which is connected to said piston within said cylinder and a second end of which extends outside of said cyl

A seat belt tensioning device to be mounted on a vehicle, comprising: a cylinder installed within a room of the vehicle; a piston slidably inserted within said cylinder; a rod, a first end of which is connected to said piston within said cylinder and a second end of which extends outside of said cylinder, passing through a through hole formed in an end wall of said cylinder; a joint member which is attached to said second end of said rod for connecting said rod to a seat belt; a piston operating means for moving said piston in one direction in which said piston leaves said end wall of said cylinder at an urgent time such as upon a vehicle impact; and an energy absorbing member which is formed of plastically deformable material and is disposed between said joint member and said end wall of said cylinder for absorbing the piston operating energy, said energy absorbing member having a thin portion, of which each end faces said joint member and said end wall of said cylinder, respectively, and of which the thickness is smaller than the diameter of said rod, whereby said energy absorbing member is strongly sandwiched between said end wall and said joint member and plastically deformed when a stroke of said piston exceeds a predetermined stroke.