The present invention pertains to a vehicle sensor device and a seat belt retractor employing same, the vehicle sensor device comprising: a body forming the outer appearance thereof; a cover coupled to one opened surface of the body; a sensor housing rotatably installed in the body according to the inclination of a backrest and the installation angle of the body; a ball installed in the sensor housing and detecting the inclination of a vehicle and the change of acceleration; and a sensor lever disposed over the ball and having one end rotatably coupled to the sensor housing, wherein the sensor lever is configured to allow a pilot lever provided in a locking device to linearly reciprocate by a rotational movement according to the movement of the ball so that the sensor lever is installed in the senser housing in which the ball is installed.

There is provided an acceleration sensor enabling precise positioning of a sensor lever of the acceleration sensor, for ensuring a stable operation of the acceleration sensor, and a seat belt retractor including the acceleration sensor. Shafts of a sensor lever projects from a base. The sensor lever is supported between supports of a sensor holder so as to be rotatable and shiftable in a rotation axis direction. The sensor lever is rotated by displacement of an inertia mass. A limiting portion of the sensor holder is brought into contact with contact portions of the sensor lever. The limiting portion limits shifting of the sensor lever in the rotation axis direction, so as to avoid contact between the base and the supports.

There is provided an acceleration sensor enabling precise positioning of a sensor lever of the acceleration sensor, for ensuring a stable operation of the acceleration sensor, and a seat belt retractor including the acceleration sensor. Shafts of a sensor lever projects from a base. The sensor lever is supported between supports of a sensor holder so as to be rotatable and shiftable in a rotation axis direction. The sensor lever is rotated by displacement of an inertia mass. A limiting portion of the sensor holder is brought into contact with contact portions of the sensor lever. The limiting portion limits shifting of the sensor lever in the rotation axis direction, so as to avoid contact between the base and the supports.

A pre-tensioner for a safety belt of vehicles is provided. The pre-tensioner for a safety belt of a vehicle that is disposed in a side sill of the vehicle and that operates to pull the safety belt by pushing a piston into a tube by a high pressure gas of a gas generator using explosive power of gunpowder that is configured at one side of a bracket in a state in which the piston is connected to the safety belt through a wire within the tube including: internal and external weldnuts that are fixed to each one side of internal and external side surfaces of the side sill, wherein by penetrating the side sill in a vehicle width direction by forming a screw at an external circumference of both end portions of the tube, the both end portions are engaged with the internal and external weldnuts, respectively.

A pre-tensioner for a safety belt of vehicles is provided. The pre-tensioner for a safety belt of a vehicle that is disposed in a side sill of the vehicle and that operates to pull the safety belt by pushing a piston into a tube by a high pressure gas of a gas generator using explosive power of gunpowder that is configured at one side of a bracket in a state in which the piston is connected to the safety belt through a wire within the tube including: internal and external weldnuts that are fixed to each one side of internal and external side surfaces of the side sill, wherein by penetrating the side sill in a vehicle width direction by forming a screw at an external circumference of both end portions of the tube, the both end portions are engaged with the internal and external weldnuts, respectively.

A vehicle-sensitive sensor for a self-locking belt retractor, including a carrier part (4), a locking lever (2) including an engagement point (3), and a sensor mass (1) coupled to the locking lever (2), disposed as standing upright on a supporting face (5) of the carrier part (4) and tiltable with respect to the carrier part (4) The sensor mass (1) includes a sensor part (6), made of a first material, resting on the supporting face (5), and of a mass part (7), made of a second material, connected to the sensor part (6), disposed above the supporting face (5), wherein the first material forming the sensor part (6) has a lower density and a lesser hardness than the second material forming the mass part (7).

A vehicle-sensitive sensor for a self-locking belt retractor, including a carrier part (4), a locking lever (2) including an engagement point (3), and a sensor mass (1) coupled to the locking lever (2), disposed as standing upright on a supporting face (5) of the carrier part (4) and tiltable with respect to the carrier part (4) The sensor mass (1) includes a sensor part (6), made of a first material, resting on the supporting face (5), and of a mass part (7), made of a second material, connected to the sensor part (6), disposed above the supporting face (5), wherein the first material forming the sensor part (6) has a lower density and a lesser hardness than the second material forming the mass part (7).

An assembly (18) for a belt retractor of a vehicle comprises a holding fixture (34) and a vehicle-sensitive sensor (32) arranged in the holding fixture (34) for activation of a locking mechanism (16) of the belt retractor. The sensor (32) comprises a sensor housing (50) and an inertia body (52) suspended in the sensor housing (50). A spherical holding space (44) via which the sensor housing (50) is positioned in the holding fixture (34) so that the sensor (32) is movable only relative to one positioning axis (48) is formed in the holding fixture (34).

An assembly (18) for a belt retractor of a vehicle comprises a holding fixture (34) and a vehicle-sensitive sensor (32) arranged in the holding fixture (34) for activation of a locking mechanism (16) of the belt retractor. The sensor (32) comprises a sensor housing (50) and an inertia body (52) suspended in the sensor housing (50). A spherical holding space (44) via which the sensor housing (50) is positioned in the holding fixture (34) so that the sensor (32) is movable only relative to one positioning axis (48) is formed in the holding fixture (34).

A vehicle occupant protection device (10) for helping to protect an occupant of a seat of a vehicle includes an inertia member (66) that engages an element (54). The inertia member (66) is movable relative to the element (54) from an unactuated position to an actuated position in response to at least one sensed vehicle condition for activating the occupant protection device (10). A vertical axis (83) extends through the center of mass of the inertia member (66) when the inertia member (66) is in the unactuated position. At least one of the element (54) and the inertia member (66) has at least one planar surface (80) that extends at an angle relative to the vertical axis (54). The inertia member (66) and element (54) are movable relative to one another along the at least one planar surface (80) to place the inertia member (66) in the actuated position to activate the occupant protection device.