Abstract: Described is a belt tensioner for a seat belt having a belt retractor, a tensioner pinion (4) non-rotatably connected to the belt retractor, a tube (2) having a pyrotechnical gas generator arranged therein, and a plurality of mass bodies (6) driven by the pressure generated by the gas generator. The mass bodies (6) engage with the tensioner pinion (4) in a force transmitting manner and drive the belt retractor in the winding direction. A first and a second section (2a, 2b) of the tube (2) run parallel to each other. A third section (2c) with a curved course that projects out of the plane (E) connects the first and second sections, thereby creating a space (7) between the first, second and third sections (2a, 2b, 2c), for accommodating at least one of the mass bodies (6a, 6b).

Abstract: A seatbelt device having a first energy absorbing member with two axial direction end portions attached respectively to a spindle and a lock member and which absorbs energy by undergoing twisting deformation when a load of at least a predetermined value acts on the spindle while the lock member is locked during an emergency. A second energy absorbing member is fixed to the spindle at one end portion and extends through a bend route provided in the lock member. The second energy absorbing member absorbs energy by being pulled through the bend route so as to undergo plastic deformation when the spindle rotates as a result of twisting of the first energy absorbing member. A deformation portion is interposed between a turned back portion of the second energy absorbing member and the spindle.

Abstract: Described is a belt tensioner for a seat belt having a belt retractor, a tensioner pinion (4) non-rotatably connected to the belt retractor, a tube (2) having a pyrotechnical gas generator arranged therein, and a plurality of mass bodies (6) driven by the pressure generated by the gas generator. The mass bodies (6) engage with the tensioner pinion (4) in a force transmitting manner and drive the belt retractor in the winding direction. A first and a second section (2a, 2b) of the tube (2) run parallel to each other.. A third section (2c) with a curved course that projects out of the plane (E) connects the first and second sections, thereby creating a space (7) between the first, second and third sections (2a, 2b, 2c), for accommodating at least one of the mass bodies (6a, 6b).

Abstract: A seatbelt device having a first energy absorbing member with two axial direction end portions attached respectively to a spindle and a lock member and which absorbs energy by undergoing twisting deformation when a load of at least a predetermined value acts on the spindle while the lock member is locked during an emergency. A second energy absorbing member is fixed to the spindle at one end portion and extends through a bend route provided in the lock member. The second energy absorbing member absorbs energy by being pulled through the bend route so as to undergo plastic deformation when the spindle rotates as a result of twisting of the first energy absorbing member. A deformation portion is interposed between a turned back portion of the second energy absorbing member and the spindle.