| 主权项 |
1. A seatbelt retractor comprising:
a housing; a take-up drum rotatably housed in the housing and configured to take-up and store a webbing; a ratchet gear configured to rotate integrally with the take-up drum; a lock mechanism configured to prohibit the take-up drum from rotating in a webbing-pull-out direction in case of an emergency; an inertial mass configured to oscillate in response to vehicle acceleration at a predetermined value or higher; and a sensor lever configured to be swung vertically upward by a push of the inertial mass to activate the lock mechanism, wherein the lock mechanism comprises:
a clutch rotatably arranged coaxially with the take-up drum, and configured, by its rotation, to guide a pawl configured to engage with the ratchet gear and then prohibit the take-up drum from rotating in the webbing pull-out direction;a pilot lever rotatably supported at a mounting boss erected on the clutch and configured to rotate by a push of the swung sensor lever; anda locking gear attached integrally and coaxially onto the take-up drum and configured to engage with the pilot lever having rotated, wherein the pilot lever comprises:
a sleeve portion configured to be rotatably fitted on the mounting boss; andan engagement claw portion projecting outward from an outer circumferential surface of the sleeve portion so as to face the locking gear, and configured to engage with the locking gear, and wherein, the engagement claw portion is configured to:
on an emergency, engage with one locking gear tooth of locking gear teeth formed on an outer circumference portion of the locking gear;elastically deform toward the sleeve portion by a push of the one locking gear tooth after the engagement on the emergency, andrelease the elastic deformation when disengaged with the one locking gear tooth. |
