Tensioning device with an opening area formed by a material weakening in a seal carrier

摘要

The present invention relates to a tensioning device (1) for a safety belt with a tensioner tube for receiving and guiding a pressure gas piston (2), a connected to the tensioner tube, a cable guide (4) forming deflecting block (3), in which a to the cable deflection (4) adjoining pressure chamber (5) is formed, and a at the Umlenkblock (3) attached and to the pressure chamber (5) connected to the gas generator (6), and with a on the piston (2) connected to the pull rope (7), which with a in a tensioning movement to be offset seat belt component is connected and from the cable guide (4) in the pressure chamber (5) and passes through the pressure chamber (5), wherein for sealing the pressure chamber (5) against the pull cable (7) at the deflection end of the pressure chamber (5) a rope enclosing the entire surface of the seal (9) is arranged, which is part of a in the pressure chamber (5) used, with a tubular Wandu ng (11) through the pressure chamber (5) extending seal carrier, characterized in that in the closed wall (11) of the seal carrier by a material weakening the gas generator (6) associated opening portion (13) is formed, in the case of release of the the pressurized gas supplied to the gas generator (6) is acted upon, so that the opening region (13) releases a passage opening (14) for the compressed gas to be introduced into the seal carrier (10).