(EN)
A retractor for a seat belt of a vehicle has a winding shaft (2) for winding up a seat belt (1). A motive spring (3) biases the winding shaft (2) in the winding direction of the seat belt. An electric motor (4) produces torque can be transmitted to the motive spring (3) to change the spring force. A switch coupling (5) transmits the torque of the electric motor to the winding shaft to wind up the seat belt (1). A gear (13) transmits the torque of the electric motor to the winding shaft (2) or the motive spring (3). The motive spring (3), the coupling (5) and the gear (13) are provided on one side of the seat belt retractor. The gear (13) comprises a drive wheel (11) which is rotatably mounted on a shaft (8) rotationally and coaxially connected to a winding shaft (2), and which is rotationally connected to an outer spring end (10) of the motive spring (3) by a rigid rotary connection (15). A first active surface (18) of the coupling (5) is movably mounted against a restoring force on a component (25) securely connected to the rigid rotary connection (15) and is able to rotate around the shaft (8). A second active surface (19) of the coupling (5) is rotationally connected to the shaft (8).
(ZH) 一种用于车辆安全带的收紧器具有一用来收拢安全带(1)的缠绕轴(2)。一驱动弹簧(3)沿安全带的缠绕方向偏置缠绕轴(2)。一电动机(4)产生的扭矩可传递给驱动弹簧(3)以改变弹簧力。一连接器(5)将电动机的扭矩传递给缠绕轴以收拢安全带(1)。一齿轮(13)将电动机的扭矩传递给缠绕轴(2)或驱动弹簧(3)。驱动弹簧(3)、连接器(5)和齿轮(13)设置在安全带收紧器的一侧上。齿轮(13)包括一可转动地安装在轴(8)上的驱动轮(11)，而轴(8)又可转动地和同轴地连接于缠绕轴(2)，驱动轮(11)通过一刚性转动连接(15)可转动地连接于驱动弹簧(3)的弹簧外端(10)。连接器(5)的一第一致动表面(18)抵抗一恢复力而可移动地安装在一组件(25)上，该组件(25)固定地连接于刚性转动连接(15)并能围绕轴(8)转动。连接器(5)的一第二致动表面(19)可转动地连接于轴(8)。
