Abstract: There is provided a webbing take-up device including: a spool to which an end of webbing is anchored and that takes up the webbing by rotating in a take-up direction; a lock portion that restricts rotation of the spool in a pullout direction, in a coupled state capable of transmitting rotation force to the spool; a sensor portion that actuates in a rapid vehicle deceleration state in which a vehicle is being decelerated with a deceleration of a specific value or greater, a state in which the spool is rapidly rotated with an acceleration of a specific value or greater in the pullout direction, or a combination thereof; a drive portion that rotates the spool in the take-up direction by forward driving force output and that actuates the sensor portion; and a clutch portion that couples the spool and the lock portion by actuation of the sensor portion.

Abstract: A retractor includes a pretensioner unit including a pinion gear configured to rotate in association with a windup drum, a piston that causes the windup drum to rotate in a direction of winding webbing through the pinion gear, a cylinder that holds the piston, and a gas generating member that fills an interior space of the cylinder with a gas to drive the piston. The cylinder includes a gas release hole on a side surface thereof, the gas release hole provided to be located: in an initial position of the piston before gas generation, at a position at which the interior space and an outside thereof are not continuous with each other through the gas release hole; and after gas generation, at a position at which the interior space that has changed upon moving of the piston and the outside are continuous with each other through the gas release hole.

Abstract: To allow a seat belt retractor to be easily assembled and to be made compact while effectively operating a pretensioner and an energy absorbing mechanism. A plurality of balls 20 rotate a ring gear 25 by gas generated in the event of an emergency. Since internal teeth 25a are meshed with external teeth 26a, a pinion 26 is rotated by the rotation of the ring gear 25, and a spool retracts a seat belt. After pressing the ring gear 25, the balls 20 separate from the ring gear 25 and are stored in an arc-shaped passage 33. Since the seat belt is then withdrawn, the pinion 26 and the ring gear 25 rotate in a seat-belt withdrawing direction. In this case, some of the balls 20 in contact with the ring gear 25 are returned by the ring gear 25. Therefore, the ring gear 25 more smoothly rotates because the influence of the balls 20 is suppressed.

Abstract: A retractor includes a windup drum that winds webbing and a pretensioner unit that causes the windup drum to rotate in a windup direction of the webbing. The pretensioner unit includes a pinion gear configured to rotate in association with the windup drum, a piston that includes a rack for meshing with the pinion gear and causes the windup drum to rotate in the windup direction through the pinion gear, a tubular cylinder that has a circular cross-section and movably holds the piston, and a drive mechanism that drives the piston. The piston further includes, on a rear surface side of the rack, a contact surface configured to come into contact with an inner wall of the cylinder, and the cylinder has such a tube length as not to expose the contact portion in a movable range of the piston.

Abstract: To effectively operate a pretensioner using a plurality of balls and an energy absorption mechanism, to simplify the structure of an exhaust passage in the pretensioner, and to facilitate the working process of the exhaust passage. A pretensioner 15 includes a plurality of balls 20 serving as force transmission members and a piston 21 in a pipe 17. A piston body 21a of the piston 21 includes a shaft portion 21c and a substantially hemispherical head portion 21d. The piston body 21a is provided with an exhaust hole 21e extending in the axial direction and exhaust grooves 21f communicating with the exhaust hole 21e that define an exhaust passage. The exhaust grooves 21f prevent the exhaust hole 21e from being closed even if the head portion 21d of the piston 21 contacts the ball 20. Since the exhaust hole 21e and the exhaust grooves 21f are simply provided in the piston body 21a formed as a single member, the structure of the exhaust passage is simple, and working of the exhaust passage is easy.

Abstract: A dual spool retractor device for seat belts in a motor vehicle including a frame, two spools rotatably mounted to the frame, and a pretensioning system providing pretensioning rotation for both the spools. The spools are pretensioning through the activation of a micro-gas generator. The gas generator can provide gas to a single or a pair of gas cylinders. One or more flexible numbers such as a metal band or cable is used which is coupled to one or both spools via a pulley. Activation of the gas generator forces a piston to move in a manner which exerts tension on the flexible member(s) thereby unwinding the flexible member from the spool pulley and providing pretensioning rotation of the respective belt spool.

Abstract: A pretensioner apparatus of a seat belt may include a movement tube, a piston movably disposed inside the movement tube, a gas generator fluid-connected to the movement tube and generating a gas upon crash of the vehicle so as to inject the gas into the movement tube to move the piston in a predetermined direction, a linkage unit, a worm connected to the piston through the linkage unit, and a worm wheel engaged with the worm, wherein the worm rotates according to movement of the piston via the linkage unit when the piston moves in the predetermined direction by the gas generated by the gas generator, and wherein the worm wheel fixed to a spool rotates together with the worm to rotate the spool and a seat belt webbing connected to the spool is wound around the spool while the worm rotates according to the movement of the piston.

Abstract: An anchor pre-tensioner for seat belt of vehicle improves phenomenon in which a webbing of seat belt is caught in belly of passengers during collision by the vehicle.

Abstract: Assembling performance of a torsion bar to a spool is improved. When a webbing take-up device is assembled, the torsion bar is inserted into the spool while catch projections of a serration pillar of the torsion bar are corresponded to insertion grooves of an insertion hole of the spool. Subsequently, in a state where the serration pillar of the torsion bar arrives at an catch hole of the spool, the torsion bar is rotated in a winding direction with respect to the spool, so that the catch projections are caught by catch surfaces of catch grooves of the catch hole, whereby the torsion bar is made non-removable from the spool. Therefore, a direction in which the torsion bar is assembled to the spool is made to be only an axial direction of the spool, and assembling performance of the torsion bar to the spool can be improved.

Abstract: The invention relates to a belt retractor for winding up and unwinding a safety belt, with at least one force transmission element which is held by a first part of the belt retractor and which can be connected to a second part of the belt retractor, the force transmission element being held in a recess of the first part in such a way that it can be pressed axially into the recess of the first part, with the result that the connection to the second part is broken.

Abstract: A releasable tether retention system includes a housing having a slot extending therealong and a projection extending into the slot. The projection is coupled to the housing so as to be movable along the housing between a first position along the slot and a second position along the slot. Rotation of the projection is prevented when the projection is in the first position, and rotation of the projection is enabled when the projection is in the second position.

Abstract: A pretensioner includes a gas generator, a pinion, a tube pipe, a piston ball, a plurality of balls, and a tube cover. The tube pipe includes a tubular part that is formed continuously from one end portion to the other end in order to receive the piston ball and the plurality of balls. A hook portion formed at the other end portion is angled toward the pinion. A tip end part of the hook portion is attached to at least one of a refractor frame and the tube cover. With this construction, a reduction in an engagement amount between the pinion and the balls during operation of the pretensioner can be prevented, and as a result, the pinion can be rotated efficiently.

Abstract: A belt retractor includes a retractor frame (10) having first and second end faces (10a, 10b) between which a belt reel (12) is pivoted. The belt retractor further includes a belt tensioner and a spring cassette (30) having a helical spring (26) coupled to the belt reel (12). The spring cassette (30) is arranged between the first end face (10a) of the retractor frame (10) and at least one component of the belt tensioner. A method of fitting such belt retractor includes mounting the spring cassette (30) on a component of the belt tensioner, especially on an inside of a tensioner casing (22) and mounting the belt tensioner including the spring cassette (30) on the retractor frame (10), especially on an end wall (10a) of the retractor frame (10). An alternative fitting method includes mounting the spring cassette (30) on an end wall (10a) of the retractor frame (10) and attaching the belt tensioner to the spring cassette (30) mounted on the end wall (10a) of the retractor frame (10).

Abstract: A belt tensioner for a belt retractor having a load limiter includes a pivoted pinion (14) coupled to a belt reel, a drive unit and a load transmission element (20) moved by the drive unit. The load transmission element (20) engages in the pinion (14) so as to rotate the pinion in a tensioning direction A. The load transmission element (20) is designed so that in the rotational position adopted by the pinion (14) after being rotated by the load transmission element (20) a part (20b) of the load transmission element (20) engages in the pinion (14). A method of tensioning a seat belt by means of a belt tensioner and subsequent load limitation by means of a load limiter includes moving a load transmission element (20) by a drive unit in a first direction so that the load transmission element (20) engages in a pinion (14) coupled to a belt reel (12). The rotating the pinion (14) is rotated by the moved load transmission element (20) in a tensioning direction A.

Abstract: In case a gas generating member of a pretensioner mechanism activates due to vehicle collision, a piston in a piston housing portion moves upwards from its normal position within a pipe cylinder. As a result, the piston comes in contact with a pinion gear portion and causes the pinion gear body to rotate abruptly. Further, a bottom end of a boss portion constituting one end portion of the pinion gear body is rotatably supported at a through hole of a base plate. Further, a support portion constituting the other end portion of the pinion gear body is rotatably supported at a support hole of a cover plate.

Abstract: In a pretensioner main body, a cylindrical space and a gas introducing space are formed, and a blocking end portion including a first through hole portion is provided to block the gas introducing space. A piston is movable within the cylindrical space, and a coupling member coupled to the piston is guided to the outside from the gas introducing space through the first through hole portion. An elastic seal member is provided on the inner surface side of the blocking end portion and includes a second through hole portion allowing the coupling member to pass therethrough. A gas buffer member is provided at such a position as to sandwich the elastic seal member between the blocking end portion and itself, where a third through hole portion having a shape and a size corresponding to the shape and size of the cross-section of the coupling member is formed.

Abstract: An apparatus for rotating a webbing guide of a seat belt for a vehicle may include a drive unit for moving a cable connected at one end thereof by controlling driving of a motor in response to an actuating signal or a stop signal, the webbing guide connected to the other end of the cable, and hingedly rotated to a first direction of a vehicular body as the cable moves in a second direction, and a return unit provided on the webbing guide, and providing an elastic force to the webbing guide so that the webbing guide hingedly rotated to the first direction of the vehicular body returns to the second direction of the vehicular body when the motor stops driving.

Abstract: A webbing take-up device comprising a take-up shaft on which webbing is taken up; a movement member that is moved at a specific occasion such as a vehicle collision is detected or there is rapid vehicle deceleration; a rotation member comprising a coaxially provided rotation shaft support portion and recess portion formed at an end portion in an axial direction of the rotation shaft support portion, the take-up shaft being rotated in the take-up direction by the rotation member meshing with the movement member and being rotated during movement of the movement member; and a cover member disposed on a rotation shaft support portion side of the rotation member, the cover member comprising a plate portion, a substantially ring shaped wall that projects out from the plate portion towards a rotation member side and is accommodated in the recess portion, and a shaft bearing hole formed in the plate portion and the substantially ring shaped wall for supporting the rotation shaft support portion.

Abstract: A webbing take-up device is obtained capable of securing sealing properties to gas generated by actuation of a gas generator. A switching mechanism of a webbing take-up device is equipped with a body, a gas generator, a piston that is actuated on receipt of pressure of gas generated by the gas generator, and a cylinder that internally houses the piston. A sheet and a support plate are attached to the body. Crushable ribs are provided to the sheet. The crushable ribs press the cylinder through a general portion of the sheet by attaching the sheet and the support plate to the body.

Abstract: An acceleration-based method and device for the safety monitoring of a drive is provided. In the method a setpoint torque is calculated in a safety function as a function of the position of the accelerator pedal. An expected vehicle acceleration is determined, as a function of the setpoint torque, in the safety function. An actual vehicle acceleration is determined, preferably by an acceleration sensor. A fault situation may be detected by comparing the actual vehicle acceleration and the expected vehicle acceleration. A device, preferably included in the vehicle electronics, is configured to implement the acceleration-based method.

Abstract: When a pinion gear body (33) rotates co-axially with rotational axis of the take-up drum (6), a first rotation body (76) which is fixed to the pinion gear body co-axially rotates relatively to a second rotation body (77) which is mounted to the pinion gear body co-axially, as well, and does not rotate during initial rotation of the pinion gear body. Thereby, an engagement member (29) which is rotatably supported by the first rotation body and fitted to the first and second rotation bodies protrudes radially and outwardly. The engagement member that has thus projected gets engaged with the take-up drum. In this stage, the engagement member is pressed and moved by a guiding portion of the second rotation body in response to the relative rotation so as to be guided in an outward radial direction.

Abstract: A webbing take-up device provided with a clutch disposed between a take-up shaft and a motor, the clutch coupling and releasing coupling of the take-up shaft to the motor. When a gear wheel of the clutch is rotated in a take-up direction by the motor, a friction spring mounted to a spring housing portion of the clutch housing moves a pawl with a first protrusion of the friction spring, causing the pawl to mesh with a ratchet wheel. Relative rotation of the gear wheel with respect to the ratchet wheel (spool) in the take-up direction is thereby restricted, and the spool rotates with the gear wheel in the take-up direction. Since the pawl is directly moved by the friction spring mounted on the clutch housing, the configuration for moving the pawl can be simplified.

Abstract: A vehicular seat belt device including: a belt reel on which a webbing that restrains an occupant is wound; an actuator that generates instantaneous rotational drive force by gas that is generated during an emergency; a flywheel that rotates by the rotational drive force of the actuator; a speed increasing mechanism that is housed inside the flywheel and that increases the rotational speed of the actuator and transmits it to the flywheel; and a connecting and disconnecting unit that connects a low-speed rotation side of the speed increasing mechanism and the belt reel during rotation of the flywheel, wherein the belt reel rotates to the webbing winding-up direction by the rotational drive force of the actuator.

Abstract: A retractor for a seat belt is disclosed, including a frame, a spool that is mounted rotatably to the inside of the frame, a webbing that is wound on the spool to be pulled-in constantly to the inside of the frame and pulled-out freely from the inside of the frame to the outside thereof, a controller for recognizing vehicle information and controlling the pulling-in of the webbing, a motor for generating a driving force to rotate the spool in accordance with the control of the controller and a clutch for receiving the driving force from the motor and transmitting the driving force to the spool wherein the clutch includes; a driven gear that receives the driving force from a driving gear provided on a rotation shaft of the motor; a plate that is provided facing to one end of the driven gear and inter-connected with the driven gear; a braking disk that is provided to be engaged with the other face opposing one face of the plate, facing to one end of the driven gear, and is in friction with the plate to stay tem

Abstract: A clutch includes a clutch housing that rotates with a spindle and has inner teeth; a pair of pawls that can engage with the inner teeth; a gear wheel that is joined to a motor and has a pair of sliding grooves that hold the pawls such that the pawls can move in the sliding grooves between a first position when the motor is not operating, a second position at which the pawls engage with the inner teeth of the clutch housing through operation of the motor, and a third position at which the pawls become positioned on the opposite side to that of the second position across the first position upon operation of the pretensioner; and a return prevention mechanism that prevents the pawls from returning to the first position and the second position after having moved to the third position.

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 seat belt retractor (10) is provided with: a spindle (12) around which a seat belt (B) is wound; a torsion bar (17) disposed in a cavity (27) of the spindle (12), an axial end portion of the torsion bar (17) being attached to an axial end portion of the spindle (12); a first pretensioner (16) that is attached to the spindle (12) at least during a collision so as to cause the spindle (12) to rotate in a retraction direction using a gas pressure; and a second pretensioner (18) that is attached to another axial end portion of the torsion bar (17) at least during a collision so as to cause the spindle (12) to rotate in the retraction direction via the torsion bar (17) using the gas pressure.

Abstract: A seat belt retractor for a safety belt is provided. The retractor includes a seat belt spindle for winding up and unwinding the safety belt and a tensioning drive, which comprises a gas generator, a drive wheel and a supply pipe which connects the gas generator and the drive wheel, a plurality of thrust elements being present in the supply pipe which, after triggering the gas generator, are accelerated and indirectly or directly drive the drive wheel for winding up the safety belt. At least one of the thrust elements is a fiber-reinforced thrust element.

Abstract: A pretensioner for a seat belt is configured to reduce injury by preventing load applied to the passenger's chest from increasing, by allowing a compressed gas generated in a cylinder when a rack used for the pretensioner moves down to be discharged while rotating along a spiral guide blade formed in a micro gas generator. The pretensioner may include a pinion connected to a cylindrical spool wound with a webbing, a cylinder receiving a rack engaged with the pinion, a micro gas generator disposed in the cylinder and rotating the pinion by moving the rack with an explosion due to an external shock, and a generator cap covering the outer circumferential edge of the cylinder and preventing the micro gas generator from separating outside, in which a guide blade that guides gas discharged is formed on the outer circumferential edge of the micro gas generator.

Abstract: A retractor/pretensioner apparatus of a seatbelt for a vehicle may include a housing, a spool to which ends of a shoulder webbing and a wrap webbing may be simultaneously connected and which may be rotatably installed in the housing via a rotary shaft, a pinion coupled to one end of the rotary shaft, a first rack and a second rack slidably installed to the housing and engaged with the pinion respectively, a first gas generator fluid-connected to the first rack to provide gas to the first rack, and a second gas generator fluid-connected to the second rack to provide gas to the second rack.

Abstract: The disclosed seat belt retractor may include a spool for retracting a seat belt, a torsion bar, a pre-tensioner, and a locking device. The torsion bar may disposed inside the spool, wherein one side of the torsion bar is connected to the spool, and configured to absorb energy of movement of an occupant while being deformed under torsion. The pre-tensioner may be positioned at one side of the spool and configured to generate a rotating drive force for rotating the spool in a retracting direction in a condition of rapid deceleration of a motor vehicle. The locking device may be capable of locking another side of the spool such that a rotation of the spool in a withdrawal direction is suppressed at both an operating time of the pre-tensioner and a non-operating time of the pre-tensioner.

Abstract: A seat belt tensioner for motor vehicle, having a belt shaft (12) rotatably supported in housing as a carrier of a seat belt wound thereon and with a tensioner drive coupled thereto by a metal strip (18), the drive rotatable driving the belt shaft (12) when triggered by action on the metal strip (18) and the movement thereof, the metal band (18) before triggering the tensioning drive (10) surrounds an extension (13) of the belt shaft. The metal strip (18) is wound around the extension (13) of the belt shaft (12) in at least one winding turn serving as winding supply (20) for the movement thereof. The winding reserve (20) is held at a radial gap (21) to the extension (13) of the belt shaft (12) by a holding element (22) releasing the metal band (18) in case of tensile force acting on the metal strip caused by activation of the belt tensioner causing the metal stripto engage and rotate the belt shaft extension.

Abstract: A mounting concave portion with a predetermined depth is formed on a gas-pressure-receiving-side surface of a piston. Further, a plate-like sealing member includes a mounting convex portion which is erected at a position meeting with the mounting concave portion on the gas-pressure-receiving-side surface of the piston. When the piston and the sealing plate are assembled together, the mounting convex portion is fitted in the mounting concave portion. By merely pushing the mounting convex portion in the mounting concave portion, the sealing plate and the piston can be integrated, which improves productivity in assembly. Further, the sealing plate will not get twisted, deviated or displaced due to friction against inner wall of the pipe cylinder when the sealing plate and the piston are integrally inserted in the pipe cylinder. Deterioration of sealing function due to improper mounting of the sealing plate can be avoided.

Abstract: A reversible seat belt tensioner includes an electric motor (2), a belt shaft (1) drivable in the belt winding direction by the electric motor (2) via a drive wheel (10), and a drive shaft (9) transmitting the rotational movement of the electric motor (2) to the drive wheel (10). The drive shaft (9) is connected to at least one of the drive wheel (10) and the electric motor (2) via a helical gear unit. The use of a helical gear unit provides the advantage that the rotational axes of the meshing components can be arranged at angles other than 90 degrees with respect to each other because the components in the helical gear units only come into punctiform contact.

Abstract: A piston for a pretensioner device (10) for a motor vehicle seat belt system of a type having a gas generator (17) with the piston (21) guided in a tube (16) that closes a pressure space (20) in the tube (16). The pressure space (20) can be pressurized by the gas generator (17), driving the piston (21) to undergo pretensioning operation transmitted to the seat belt system by a force transmission means. The piston has a dome shaped front side adapted to engage a force transmission element and a skirt forming a sealing lip oriented toward the pressure space. At least one slot is formed in the outer surface of the piston extending axially from the sealing lip. The slot can be enlarged by the material erosion caused by the pressure and/or pressure conditions in the pressure space produced by gas from the gas generator.

Abstract: A seat belt pretensioner for a belt retractor includes a member that rotates relative to a frame of the belt retractor in response to a vehicle condition to rotate a spool of the belt retractor relative to the frame. A drive device rotates the member in response to the vehicle condition. The drive device applies a first torque to the member during a first stage of rotation of the member and the spool and applies a second torque greater than the first torque during a second stage of rotation of the member and the spool. A flexible drive member rotates the member relative to the frame. The flexible drive member extends around an axis of the member more than 360° after activation of the pretensioner.

Abstract: A seat belt pretensioner having a housing, a belt shaft (10), a load limiting device (70) and a pretensioner drive wheel (20) coupled to the belt shaft (10). A coupling element (60) is fixed to the drive wheel (20) via a detachable connection, and can be locked by a blocking device (90). An engagement wheel (50) is provided for connecting the belt shaft (10) with the pretensioner drive wheel (20) having engagement portions (51) engaging into corresponding recesses (12) on the belt shaft (10) or on the pretensioner drive wheel (20) and is fixed by the coupling element (60). The detachable connection can be disconnected by locking of the coupling element (60) and rotation of the belt shaft (10) in the belt webbing extraction direction, thereby the engagement wheel (50) undergoes relative rotation in relation to the pretensioner drive wheel (20) or to the belt shaft (10).

Abstract: A seat belt pretensioner apparatus for a vehicle may include a motor operated in response to a control signal of a seat-belt controller, a reduction gear transmitting a rotating force of the motor, and a rotary roll rotated by a rotating force transmitted from the reduction gear, an end of a seat belt being coupled to the rotary roll.

Abstract: A pretensioner mechanism comprising webbing capable of restraining a vehicle occupant; a cylinder member into which gas is supplied when specific conditions occur; a movement member provided so as to be capable of moving inside the cylinder member, the movement member being formed with a communication hole that communicates a first side and a second side of the movement member; a closure member that is inserted into the communication hole and substantially closes off the communication hole to such an extent that pressure from the gas supplied into the cylinder member causes the movement member to move towards the first side and the restraining force of the webbing on the occupant is increased; and a communication groove formed between the communication hole and the closure member to communicate a first side of the closure member with a second side of the closure member.

Abstract: A webbing take-up device enabling a reduction in size of an overload release mechanism and easy adjustment of an operation torque of the overload release mechanism is provided. In the overload release mechanism of this webbing take-up device, rotary force of a large diameter gear is transmitted to a small diameter gear via plural annular friction springs. The friction springs are disposed between an inner periphery face of a main body portion of the large diameter gear and a tubular portion of the small diameter gear, side by side along an axial direction of the two gears. Consequently, a radial direction enlargement of the large diameter gear and small diameter gear due to space for disposing the friction springs may be restrained. Moreover, the operation torque of the overload release mechanism may be adjusted stepwise by changing the number of the friction springs to be used, in accordance with requirements.

Abstract: A pipe includes a cutout portion through which levers of a ring gear enter the pipe. An inner peripheral surface of the pipe opposing the cutout portion includes a curved inner peripheral surface in a curved portion of the pipe, a linear inner peripheral surface in a linear portion of the pipe, and a transition portion from the curved inner peripheral surface to the linear inner peripheral surface. The transition portion is located closer to a position where balls start to press the levers of the ring gear, than an intersection where an imaginary straight line ? extending from a cutout end portion of the cutout portion intersects an imaginary extension line of the inner peripheral surface of the linear portion of the pipe at a right angle.

Abstract: Disclosed is a pretensioner for an occupant restraint. The pretensioner is designed to be used in conjunction with an inertial reel that locks the occupant restraint when detecting an adverse event. The pretensioner acts to remove slack in the webbing of the restraint and thereby safely secure the occupant once the reel is locked. The pretensioner described herein includes a rack that is initially held in place by a shear pin. Upon being activated, the rack is forced to a fully extended orientation, whereby the shear pin is severed. A deceleration ramp in included beneath the rack to slowly bring the rack to a stop at the end of the stroke.

Abstract: Provided is a webbing winding device capable of mounting a holding member for holding a pretensioner on a frame easily. The webbing winding device has a holder which is mounted on a leg plate only by applying loads to tip ends (upper ends) of load receiving pieces and pushing the tip end (bent portion) sides of engagement claws into hole portions. With this structure, the operation of mounting the holder on the leg plate is easy and does not need any component such as screw. As no fastening component such as screw for mounting the holder on the leg plate is required, the cost for components is reduced and as no fastening step of screw is required, such cost is also reduced.

Abstract: An operating load of an overload releasing mechanism is made to be high by a simple method. In a webbing retractor, spring claws engage with recesses of a rotor, and a gear wheel and the rotor are connected. When relative rotational force is applied between the rotor and the gear wheel, the spring claws elastically deform and engagement thereof with the recesses is released. Due thereto, connection of the rotor and the gear wheel is released, and the overload releasing mechanism is operated. Here, urging members urge the spring claws toward a side of engaging with the recesses. Due thereto, the operating load of the overload releasing mechanism can be made to be high by a simple method of merely adding the urging members.

Abstract: An occupant protection device includes a plurality of gas generators that actuate respective mechanisms, and a control portion that actuates the gas generators. If a condition for actuating at least one of the gas generators is fulfilled and a condition for actuating the other gas generators are unfulfilled, the other gas generators are controlled by the control portion at a timing that is uninfluential on an actuation state of one of the mechanism actuated by the one of the gas generators and that is different from a preset timing for actuating the other mechanisms actuated by the other gas generators.

Abstract: [Object] To provide a retractor that is manufacturable at a much lower cost by making a pretensioner operate more effectively, by minimizing the length of a pipe so that a weight reduction is realized effectively, and by easing the restriction for the shape of a guide member. [Solution] A pipe 17 in which a plurality of balls as force transmitting members are provided includes an attaching portion 17c as a projection provided at one end portion 17a thereof. A guide member 18 having a guide surface 18c that guides the balls has attaching grooves 18 as recesses. The attaching portion 17c is fitted into the attaching grooves 18, whereby the pipe 17 is attached around the outer circumference thereof to the guide member 18 attached to a frame. Since the guide member 18 is provided on the outer circumference of the pipe 17, the pipe 17 can be shortened.

Abstract: A seat belt pretension with improved piston sealing performance. A piston has an expanding section formed at one end thereof contacting a force transmission component. When gas pressure resulting from reactive gas generated by a gas generator causes the piston to exert a pressing force on the force transmission component in the event of an emergency, the expanding section expands toward the inner circumferential surface of a pipe due to the gas pressure. As a result, the outer circumferential surface of the expanding section in the piston comes into contact with the inner circumferential surface of the pipe in a more efficient manner, resulting in enhanced sealing between the piston and the inner circumferential surface of the pipe. This prevents reactive gas from losing gas pressure, thereby allowing the gas pressure to more efficiently act on the piston.

Abstract: A webbing take-up device includes a speed-reduction mechanism that reduces rotation speed of a motor to transmit rotation force to a take-up shaft. An overload release mechanism is disposed at a middle position of the speed-reduction mechanism. The overload release mechanism includes a large-diameter gear rotating with the rotation speed of the motor being reduced and the rotation force being transmitted, a spring member mounted to the large-diameter gear, and a small-diameter gear provided to rotate relatively to the large-diameter gear, rotating the take-up shaft when the rotation speed thereof is reduced and the rotation force is transmitted to the take-up shaft, engaging with the spring member to become a state where relative rotation with respect to the large-diameter gear is stopped, and slides with the spring member when the rotation force acts between the large-diameter gear to become a state where relative rotation to the large-diameter gear is allowed.

Abstract: There is provided a pretensioner. The pretensioner includes: a pipe; a gas generator that generates a gas in the pipe in an emergency case; a gas generator mount on which the gas generator is mounted; a spool driving mechanism that rotates a spool in a direction to retract a seatbelt by the gas generated by the gas generator in the emergency case; a discharge hole formed in the pipe so as to allow communication between inside and outside of the pipe; and a blocking member configured to block the discharge hole from inside of the pipe, the blocking member being configured to open the discharge hole when the blocking member is pressed from outside of the pipe with a pressing force equal to or greater than a given pressing force.

Abstract: A tensioning device (10) for a seat belt, in particular in a motor vehicle, having a gas generator (17) and a piston (21) guided in a tube (16) that closes a pressure space (20) in the tube (16), whereas the pressure space (20) can be pressurized by the gas generator (17), as a result of which the piston (21) can be driven to perform a tensioning operation which can be transmitted to the seat belt by means of the force transmission means. The piston (21) having a closed or constricted opening (1, 1a), and the opening (1, 1a) can be enlarged and/or opened by the material erosion caused by the pressure and/or pressure conditions in the pressure space (20).