| 摘要 |
An automatic locking safety belt retractor includes a mounting frame having side walls between which a spring biased retractor reel is journalled and a ratchet wheel rotatable with the reel is located on the outer face of a side wall. A plastic guide plate is secured to the side wall outside face and has a circular opening engaged by the ratchet wheel, a slot tangentially extending from the opening and a housing recess projecting laterally from the upper end of the slot. Outwardly projecting reinforcing flanges are integrally formed along opposite parallel edges of the slot and along the bottom inclined edge of the junction between the slot and opening. A high strength bumper member is located in the recess and forms the top of the slot. A stop member is slidable in the slot and includes a tooth which in its depressed retracted position is out of engagement with the ratchet wheel and when slightly raised by an acceleration sensor engages the ratchet wheel which advances the stop member with belt extraction to strike the bumper member which stops the stop member and brakes the reel.
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