Kabushiki Kaisha Tokai Rika Denki Seisakusho

Toshio Nakashima

Tomonori Nagata

Hitoshi Takamatsu

Kazuhiko Aihara

Masaki Yasuda

Yasuho Kitazawa

A webbing take-up device comprising: a take-up shaft that takes up a webbing belt; a metal frame that axially supports the take-up shaft; and a lock mechanism comprising a lock plate that blocks rotation in the pullout direction of the webbing of the take-up shaft by engaging the take-up shaft directly or indirectly. The lock plate is formed by performing press-punch and press-bend processing on a metal plate and has a connecting portion formed so that one end side thereof is continuous with a lock, which engages the take-up shaft. The connecting portion spans between one side and the other side of the frame.

Webbing take-up device

A webbing retractor is provided that reduces the amount of webbing that is pulled-out after operation of a pretensioner mechanism. In a webbing retractor, a lock pawlis set in a non-meshable state in which it cannot mesh with a lock gear. At a time when a pretensioner mechanismoperates and a clutch platerotates in a take-up direction, a lock stopperrotates together with the clutch plateand releases engagement with the lock pawl. Therefore, the lock pawlis rotated by a compression coil springand changed to a meshable state. In this way, immediately after rotational force in a pull-out direction is applied to the lock geardue to load from a vehicle occupant after operation of the pretensioner mechanism, the lock pawlmeshes with the lock gear, and pulling-out of a webbingis impeded. Therefore, an amount of the webbingwhich is pulled-out can be reduced.

Webbing retractor, webbing retracting method, and vehicle

In a pretensioner device, engaging teeth of a pinion (rotating body) have first projections which project-out toward the other side in the peripheral direction of a cam portion. Meshing claws of a clutch plate have second projections which project-out toward a one side in the peripheral direction of the cam portion, and whose gear portion side end surfaces face the first projections. In a state before operation of the pretensioner device, movement of the clutch plate toward one side in the axial direction with respect to the pinion is restricted due to the second projections engaging with the first projections. Accordingly, in the pretensioner device, in the state before operation, even if some type of external force is applied to the clutch plate, positional offset of the clutch plate toward the one side in the axial direction with respect to the pinion can be prevented.

Pretensioner device

A webbing retractor which can prevent gas, which is for rotating a take-up shaft in a take-up direction, from affecting other structural parts. In the webbing retractor, when a pretensioner mechanism operates, gas for operation within a cylinder is exhausted toward a pinion via a gas venting hole formed in a flange portion of a piston. Because a blocking wall is provided between the pinion and an acceleration sensor, exhausted gas passes between the pinion and the blocking wall, and is exhausted to an outer side of the webbing retractor from an upper end side of a cover plate or the like. In this way, blowing-out of the exhausted gas onto the acceleration sensor is blocked, and the exhausted gas can be prevented from affecting the acceleration sensor.

Webbing retractor

A fixture is disclosed which can reliably attach an attachment member, such as a cylinder, to an attachment site, such as a frame. The fixture includes a fixing portion, which faces the attachment site at the side of the attachment site and is fixed to the attachment site, and a contact portion, which is disposed at the side opposite from the attachment site, with the attachment member therebetween. The contact portion is integrally coupled to the fixing portion, point-contacts or line-contacts the attachment member, and is configured to push the attachment member to the attachment site in a state where the fixing portion is fixed to the attachment site. A webbing take-up device including this fixture is also disclosed.

Growing community of inventors

Aichi-ken, Japan

Toshio Nakashima