Kabushiki Kaisha Tokai Rika Denki Seisakusho

Wataru Yanagawa

Masaru Ukita

Yoshiaki Maekubo

Shinichi Okubo

Akira Sumiyashiki

Motoki Sugiyama

Takahiro Tanaka

Kenji Fukuta

Takayoshi Ando

Yuji Suga

Kosuke Miida

Kengo Miura

Shigeki Hashimoto

Masanori Ukai

Tomonori Nagata

Hitoshi Takamatsu

Yasunori Hata

Kaoru Yuasa

Hiroaki Yamazoe

Nao Sasaki

Takanori Tanaka

Ayaka Nakamura

In a webbing take-up device, a moving member is moved while being guided along a cylinder in order to rotate a spool in a take-up direction. A urging plate of a guide member urges a flange at an axial direction leading end portion of the cylinder toward a restricting direction side, and a leg plate of a frame restricts rotation of the flange toward the restricting direction side. This enables rattling of the axial direction leading end portion of the cylinder about the axial direction of the cylinder to be suppressed.

Webbing take-up device

In a present webbing retractor, when a stopper is pushed and moved by a conical portion of a moving member, the stopper abuts a moving member main body of the moving member between a rotating member and an axial direction distal end of a cylinder, and moreover, is moved toward a side of a portion of engagement of the moving member main body with first teeth and second teeth of the rotating member, while deforming the moving member main body. Due thereto, expansion, toward a side in a direction orthogonal to an axis, of the moving member main body can be suppressed.

Webbing retractor

A webbing take-up device is provided with a spool on which a webbing to be applied to a vehicle occupant is taken up, due to the spool rotating in a take-up direction. The webbing take-up device is also provided with a lock base and a connecting member that are integrally rotatable with the spool. The lock base and connecting member are provided with a lock base-side flange portion and a connecting member-side flange portion, which are disposed opposite to one another in a rotation axis direction of the spool, and with lock base-side second engaging teeth and connecting member-side second engaging teeth.

A webbing take-up device is provided with a spool, a first rotor and a second rotor. A webbing to be applied to a vehicle occupant is taken up onto the spool by the spool rotating in a take-up direction. The first rotor is provided to be rotatable together with the spool, includes first engaging teeth with which a moving member that is moved engages, and is rotated when the moving member that is moved engages with the first engaging teeth. The second rotor is provided to be rotatable together with the spool, includes second engaging teeth with which the moving member that is moved engages, and is rotated when the moving member that is moved engages with the second engaging teeth. The second engaging teeth are disposed so as to overlap with the first engaging teeth in a rotation circumference direction of the first rotor.

In a webbing retractor, due to a moving member being moved toward an axial direction distal end side, and first teeth and second teeth of a rotating member piercing the moving member, the rotating member is rotated in a take-up direction. Here, at the moving member, a sectional surface area, in a direction orthogonal to an axis, of a small diameter portion that is at an axial direction distal end side is made to be small as compared with a moving member main body that is at an axial direction proximal end side. Therefore, resistance to movement of the moving member can be reduced.

A webbing take-up device is provided with a spool that takes up a webbing, a lock base, and a cover plate that covers an outer periphery of the lock base. A tooth portion is formed at the outer periphery of the lock base. The lock base rotates the spool when a rack contacts the tooth portion. The webbing take-up device is further provided with a guide provided at the cover plate. The guide supports the lock base to be rotatable. Thus, contacting together of the ratchet teeth and the lock base is restricted.

In a webbing take-up device, when a rotating member is rotated in a take-up direction in a state in which first engagement teeth and second engagement teeth of a rotating member are digging or biting into a moving member, the moving member is pressed by the first engagement teeth and the second engagement teeth of the rotating member. The moving member thus expands into a first deformation-permitting portion and a second deformation-permitting portion in a cover plate, and expanded portions of the moving member oppose a first restriction portion configured by an axial center direction leading end face of a cylinder, and a second restriction portion of the cover plate.

A webbing take-up device includes a spool. The webbing take-up device also includes a lock base and a coupling member that are provided so as to rotatable as an integral unit with the spool, and that engage with a rack so as to be rotated and to rotate the spool in a take-up direction when the rack is moved. The webbing take-up device further includes a rack housing section that includes a pair of wall spaced apart from each other in a rotation axis direction of the lock base and the coupling member so as to form a space in which the lock base and the coupling member are disposed. The rack housing section is provided with an abutted portion that is abutted by a part of the coupling member so as to restrict the lock base and the coupling member from moving in the rotation axis direction.

A webbing take-up device is provided with (i) a spool and (ii) a rotor rotatable integrally with the spool having a base portion and radially-extending engaging teeth. A webbing to be applied to a vehicle occupant is wound around the spool. Each engaging tooth protrudes from the base portion in a rotation axis direction of the spool, and is tapered along the rotation axis direction such that a thickness dimension in a rotation circumference direction of the spool of a portion of the engaging tooth at the opposite side thereof from the base portion becomes smaller toward the base portion side thereof. The axially-tapered shape of the engaging teeth reduces stresses and improves transmission efficiency between the rotor teeth and the teeth of a moving member engaged thereto.

A webbing take-up device includes a spool that takes up webbing worn by an occupant by being rotated in a take-up direction, and a pretensioner mechanism. The pretensioner mechanism includes a gas generator that includes a gas-generating-agent-storing portion and an ignition-device-storing portion, and a cylinder to which the gas generator is attached and that includes a second tubular portion into which gas generated by the gas generator is supplied. A discharge hole, through which gas supplied to the second tubular portion is discharged, is formed in a portion of the cylinder where the ignition-device-storing portion is disposed.

Provided is a webbing take-up device including (i) a spool onto which webbing worn by an occupant is taken up as a result of the spool being rotated in a take-up direction, (ii) a rotating body that is provided so as to be integrally rotatable with the spool, has plural teeth disposed an interval apart from each other along a circumferential direction of rotation of the spool, and is rotated as a result of a moving member being moved and becoming engaged with the plural teeth so that the spool is rotated in the take-up direction, and (iii) a regulating portion that opposes the plural teeth in an axial direction of rotation of the spool, is provided so as to be integrally rotatable with the rotating body, and regulates movement, in a direction away from the plural teeth, of the moving member engaged with the plural teeth.

In a vehicle emergency, rotation of a lock base in a pull-out direction opposite to a take-up direction is restricted. A first pinion-configuring portion formed at an outer circumferential portion of the lock base configures one width direction side of a pinion section that is rotated in the take-up direction by a rack that moves due to fluid pressure in a vehicle emergency. A coupling member disposed between the lock base and the torsion shaft is fixed to the lock base and to a torsion shaft. A second pinion-configuring portion that configures a width direction other side of the pinion section is formed alongside the first pinion-configuring portion at an outer circumferential portion of the coupling member.

A webbing take-up device includes a spool, a lock gear that restricts pull-out direction rotation of the spool, a force limiter mechanism that permits pull-out direction rotation of the spool at or above a force limiter load, and a pawl that switches the force limiter load. The webbing take-up device further includes a cylinder section that includes a first cylindrical portion and a second cylindrical portion, a gas generator that supplies gas into the second cylindrical portion, and a piston section that is moved along the first cylindrical portion by an increase in pressure inside the second cylindrical portion and the first cylindrical portion so as to press and displace the pawl. An axial center of the second cylindrical portion is disposed offset with respect to an axial center of the first cylindrical portion, and an abutted portion that is abutted by the piston section is provided at a boundary between the first cylindrical portion and the second cylindrical portion.

An increase in structural complexity is suppressed in a webbing take-up device provided with a force limiter load switching mechanism and a pre-tensioner mechanism. The webbing take-up device includes a spool that takes up a webbing, a pre-tensioner mechanism that takes up the webbing onto the spool by rotating the spool in the take-up direction in a vehicle emergency, and a lock mechanism that restricts pull-out direction rotation of the spool in a vehicle emergency. The webbing take-up device further includes a force limiter mechanism that permits pull-out direction rotation of the spool at a force limiter load or greater when the lock mechanism has restricted pull-out direction rotation of the spool, and a force limiter load switching mechanism that switches a force limiter load value by being input with a portion of an actuation force that actuates the pre-tensioner mechanism.

A webbing take-up device includes a spool that takes up a webbing worn by an occupant, and that is rotated in a pull-out direction due to the webbing being pulled out, and a lock base that limits pull-out direction rotation of the spool in a vehicle emergency. The webbing take-up device further includes an energy absorbing wire that undergoes deformation so as to permit pull-out direction rotation of the spool at or above a force limiter load when the lock base has limited pull-out direction rotation of the spool, and a second force limiter mechanism that adjusts the pressing force of the energy absorbing wire according to a remaining take-up amount of the webbing on the spool.

Growing community of inventors

Aichi-ken, Japan

Wataru Yanagawa