Abstract: The present invention is to suppress a generation of a noise due to repeatedly hitting a clutch plate against a clutch cover and a clutch guide. A webbing take-up device is provided with a clutch cover fixed to a sub-torsion shaft so as to be rotatable integrally therewith; a clutch guide arranged so as to face the clutch cover, and supported capable of relatively rotating to the sub-torsion shaft; a lock ring formed around the clutch cover and the clutch guide; and a clutch plates turned to a lock ring side while being guided by the clutch guide in accordance with relative rotation of the clutch guide to the clutch cover into one rotational direction, and engaged with the lock ring. L-shaped springs which urge the clutch plates to a clutch cover side are formed integrally with the clutch guide.

Abstract: In a webbing retractor, in a state where a second anchored portion of a sub torsion shaft is connected to a frame via a rotation impeding mechanism, when a spool is pulled by excessive tension that is applied to a webbing, there is a tendency for the spool to tilt with respect to a sleeve that is supported at the frame via the rotation impeding mechanism. In this case, a distance between a second energy absorbing portion of the sub torsion shaft and an inner peripheral surface of an insert-through hole changes. A change in the distance becomes large at an opening side of the insert-through hole, but an inner diameter of the insert-through hole is enlarged at the opening side. Due thereto, it can be made such that the second energy absorbing portion does not interfere with the inner peripheral surface of the insert-through hole.

Abstract: It is provided a webbing winding device with good assembly characteristics of components in a second lock unit. In the webbing winding device, due to a leading end of a spring tab of a guide plate interacting with ratchet teeth of an internal ratchet and a second lock base rotating in the pull-out direction in this state, relative rotation occurs between the guide plate and the second lock base, and a second lock pawl is meshed with the ratchet teeth of the internal ratchet. Since this configuration is not a configuration in which relative rotation between the guide plate and a second lock base is induced by bias force of bias means, such as a compression coil spring or the like, there is no bias force received in the rotational circumferential direction when the guide plate and the second lock base are being assembled, resulting in easy assembly.

Abstract: In a webbing winding device, a sub-torsion shaft is inserted from one side in the axial direction of a spool into the spool when assembling the sub-torsion shaft to the spool. Subsequently, by the sub-torsion shaft rotating in the winding direction, movement of the sub-torsion shaft with respect to the spool in the winding direction and in one side in the axial direction is inhibited. Subsequently, by a stopper being fitted from one side in the axial direction into insertion groove portions, movement of the sub-torsion shaft with respect to the spool in the pull out direction is inhibited. Accordingly, since the direction in which the sub-torsion shaft is assembled to the spool becomes only a direction parallel to the axial direction of the spool, the assembility of the sub-torsion shaft with respect to the spool may be improved.

Abstract: In a webbing winding device, even when a piston moves toward the other side in a movement direction due to a reaction when the piston moves to a maximum movement position, an engagement surface of a hook portion comes into contact with a subject engagement surface of a subject engagement portion, so that the movement of the piston toward the other side in the movement direction is restricted. Accordingly, the piston is prevented from returning to a standby position, and a pawl is prevented from returning to a lock position. For this reason, a state where a rotation of a locking ring in the pull-out direction is maintained. Accordingly, after the piston moves from the standby position to the maximum movement position, the piston is prevented from returning to the standby position, and the force limiter load is prevented from being changed.

Abstract: A webbing take-up device including: a spool on which a webbing fitted over an occupant is taken up; a restricting member restricting a rotation of the spool in the pullout direction under specific circumstances; a force limiter mechanism permitting the rotation of the spool in the pullout direction when a force limiter load or a higher load is imparted while the restricting member is restricting the rotation of the spool in the pullout direction; a switching member being capable of switching between a disposed position at a first position and a disposed position at second position, and provided between the first position and the second position; and an operation member being capable of being switched between operation and non-operation, whereby the disposed position of the switching member is switched between the first position and the second position and the force limiter load is switched between a high-load and a low-load.

Abstract: A webbing take-up device capable of smoothly releasing rotation locking while also stabilizing a load support direction during rotation locking. A pawl is equipped with a flat plane shaped load receiving face. The pawl is normally retained in a load receiving position but is rotationally moved when imparted with drive force of a drive mechanism section. The lock ring is equipped with a protrusion portion set with a lower rigidity than the rigidity of the pawl. The lock ring is not capable of rotating by the protrusion portion being supported by the load receiving face of the pawl, and rotation is permitted by moving the load receiving face away from the protrusion portion with rotational movement of the pawl.

Abstract: Plural door portions are formed by sectioning the gas blowing section of the gas generator with slits. In a state in which gas has been generated by the gas generator, the plural door portions part at the slits and open towards the outside of the casing body. A gas flow path section is connected to a peripheral wall section configuring an deployment space permitting opening of the door portions. The gas flow path section is provided with an upstream portion which is in communication with the deployment space and formed along a direction orthogonal to the direction of gas blowing from the gas blowing section, and an opening portion provided at the gas inflow side, which is set so as to communicate with a space which is between adjacent door portions when the door portions 56 are in a opened state.

Abstract: There is provided a webbing take-up device including: a seating portion formed to a cylinder shaped body and facing towards a cylinder shaped body axial direction second side; a bar shaped body housed at the inside of the cylinder shaped body and comprising a protrusion portion protruding out from the bar shaped body towards the cylinder shaped body axial direction second side; a push nut attached by fitting over the protrusion portion; and a washer through which the protrusion portion is inserted, the washer being seated against the seating portion with a face of the washer on the side of the washer away from the seating portion in contact with the push nut, and the rigidity to bending of the washer set higher than the rigidity to bending of the push nut.

Abstract: A webbing take-up device that is both capable of promoting reductions in size and weight and capable of excellently maintaining coupling strength between a pawl member and a ring portion. A clutch plate and a lock ring of this webbing take-up device are coupled by plural teeth provided at the clutch plate meshing with plural teeth provided at the lock ring. This lock ring is specified to have a lower material strength than the clutch plate. A tooth height H2 of the plural teeth of the lock ring is specified to be lower than a tooth height of the plural teeth of the clutch plate. Thus, when the lock ring and the clutch plate mesh, tooth tips of the plural teeth of the clutch plate come into contact with tooth bottoms of the plural teeth of the lock ring.

Abstract: A webbing retractor has a clutch mechanism. The clutch mechanism includes a lock member; a clutch cover; a clutch guide that is positioned between the clutch cover and a spool, the clutch guide being supported in a relatively rotatable manner with respect to the lock member, the clutch guide being capable of relatively rotating between an unactuated position and an actuated position with respect to the clutch cover, the clutch guide being engaged with a trigger member positioned on a side of the spool and being held in the unactuated position; a spring provided in a compressed state between the clutch cover and the clutch guide; a pawl positioned between the clutch cover and the clutch guide, and being engaged with the ring unit; and an axial-direction separation restricting mechanism that restricts axial-direction separation between the clutch cover and the clutch guide while allowing the relative rotation of the clutch cover and the clutch guide with respect to each other.

Abstract: A coil spring is provided in a compressed state between a coupling wall section provided at a clutch guide and an inner-side locking section. The clutch guide is provided with a support section which supports one axial-direction end section of the coil spring from a side opposite to the clutch cover in an axial direction of the clutch guide. The clutch cover is provided with a leading-end protruding section which is projected with respect to the inner-side locking section so as to be inserted in the other axial-direction end section of the coil spring. The leading-end protruding section is inclined, with respect to a direction orthogonal to an axial direction of the clutch cover, toward a support section side, so that the coil spring is curved so as to be convex to the support section side.

Abstract: The present invention is to suppress a generation of a noise due to repeatedly hitting a clutch plate against a clutch cover and a clutch guide. A webbing take-up device is provided with a clutch cover fixed to a sub-torsion shaft so as to be rotatable integrally therewith; a clutch guide arranged so as to face the clutch cover, and supported capable of relatively rotating to the sub-torsion shaft; a lock ring formed around the clutch cover and the clutch guide; and a clutch plates turned to a lock ring side while being guided by the clutch guide in accordance with relative rotation of the clutch guide to the clutch cover into one rotational direction, and engaged with the lock ring. L-shaped springs which urge the clutch plates to a clutch cover side are formed integrally with the clutch guide.

Abstract: A sleeve is fitted in a spool so as to be arranged coaxially with the spool. A fit-insertion hole including plural female splines is formed on a cylindrical inner side of the sleeve coaxially with an axial line of the sleeve. A fit-insertion portion, which is fit-inserted in the fit-insertion hole, of a sub torsion shaft is coaxial with an axial line of the sub torsion shaft and provided with plural male splines formed on an outer peripheral side of the fit-insertion portion. As a result of rotational displacement of the sleeve about the axial line thereof and regulation of rotation of the sub torsion shaft, so an axial center of the fit-insertion portion is made to coincide with an axial center of the fit-insertion hole, a fit-insertion portion side of the sub torsion shaft is fixed by a fixing mechanism with respect to the sleeve.

Abstract: It is provided a webbing winding device with good assembly characteristics of components in a second lock unit. In the webbing winding device, due to a leading end of a spring tab of a guide plate interacting with ratchet teeth of an internal ratchet and a second lock base rotating in the pull-out direction in this state, relative rotation occurs between the guide plate and the second lock base, and a second lock pawl is meshed with the ratchet teeth of the internal ratchet. Since this configuration is not a configuration in which relative rotation between the guide plate and a second lock base is induced by bias force of bias means, such as a compression coil spring or the like, there is no bias force received in the rotational circumferential direction when the guide plate and the second lock base are being assembled, resulting in easy assembly.

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: To simplify the structure of a webbing retractor, at a second locking mechanism 44 of the webbing retractor, when a gas generator is not operated, a cam engages with an outer peripheral groove of a lock ring, and a limit load by a torsion shaft is made to be a high load. On the other hand, when the gas generator is operated, the cam is moved apart from the outer peripheral groove of the lock ring, and the limit load by the torsion shaft is made to be a low load. Because only the cam is interposed between the lock ring and a piston which is driven by the gas generator, the number of parts of the second locking mechanism can be reduced, and the structure of the second locking mechanism can be made simple.

Abstract: An airbag device according to the present invention includes an airbag folded and housed in the shape of folded-up body, and an airbag wrapping member for keeping the folded-up configuration of the airbag. The folded-up body is formed by bringing both ends of the airbag close to a base line, such that the folded-up body is symmetric with respect to the base line. The wrapping member includes a breakable portion in a region above the base line. The breakable portion includes a plurality of apertures each of which is located across the base line as to extend toward both sides from the base line, and connecting portions for connecting adjacent apertures into a larger opening upon breakage. The connecting portions disposed by the side of both ends of each of the apertures are located in opposite sides of the base line. The wrapping member further includes two cut-out portions in edges of a cover portion in a direction along the base line.

Abstract: An airbag device according to the present invention includes an airbag folded and housed in the shape of folded-up body, and an airbag wrapping member for keeping the folded-up configuration of the airbag. The folded-up body is formed by bringing both ends of the airbag close to a base line, such that the folded-up body is symmetric with respect to the base line. The wrapping member includes a breakable portion in a region above the base line. The breakable portion includes a plurality of apertures each of which is located across the base line as to extend toward both sides from the base line, and connecting portions for connecting adjacent apertures into a larger opening upon breakage. The connecting portions disposed by the side of both ends of each of the apertures are located in opposite sides of the base line. The wrapping member further includes two cut-out portions in edges of a cover portion in a direction along the base line.