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US 4,063,777 AGranted
Shoulder safety belt retractor
AssigneeTakata Kojyo Co., Ltd.
InventorJuichiro Takada
Life of this patent
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AssigneeTakata Kojyo Co., Ltd.
InventorJuichiro Takada
Estimating the term…
A vehicle shoulder safety belt retractor includes a first ratchet wheel carrying reel which is biased in a belt retraction direction and an oppositely oriented second ratchet wheel is mounted on the first ratchet wheel. A first normally retracted pawl is associated with the first ratchet wheel and a mechanism responsive to either highly accelerated belt withdrawal or the excessive acceleration or tilting of the vehicle or both for advancing the first pawl to lock the reel against belt extraction in emergencies. A second pawl is advanced by energization of an actuating solenoid to engage the second ratchet wheel and brake the reel against belt retraction. The solenoid is connected to a source of current through a series connected pair of switches, one of which is closed with the application of the seat belt and the other being located in the seat back and which is closed by the seat occupant reclining against the seat back so that the shoulder belt pressure against the comfortably seated occupant is obviated.
Seat belt assembly for vehicles equipped with an emergency locking type belt retracting device characterized in that said seat belt assembly comprises a normal position detection switch which is actuated when the passenger assumes a predetermined position on the seat as when reclining comfortably against the seat, said switch being provided in the seat back or other suitable location, a belt wear detection switch designed to be actuated when the passenger puts on the belt, said switch being provided in the buckle or other suitable position, a lock mechanism adapted to inhibit draw-out of the belt in the event of emergency, said lock mechanism being provided in the winding device, a reversely toothed wheel which is toothed reversely to the ratchet wheels of said lock mechanism, said reversely toothed wheel being secured on said ratchet wheel and the like, and a solenoid provided in a frame or other member and adapted to have a check lever fitted in said frame engaged with said wheel, said solenoid being electrically connected to said both switches whereby only when the passenger both takes the predetermined position and wears the belt, is said solenoid energized or deenergized to stop the retraction of the belt by the action of said check lever, and means including a reversely toothed wheel and other members for allowing draw-out of the belt, and in the event of trouble such as a crash, the belt is emergency locked regardless of the position of the passenger.
In association with a vehicle seat, a safety belt system comprising a belt retractor reel having a safety belt connected thereto and being rotatable in opposite belt extraction and retraction directions and being spring biased to rotate in a belt retraction direction, a first ratchet wheel rotatable with said reel, a first pawl movable between advanced and retracted positions engaging and disengaging said first ratchet wheel respectively and being normally resiliently biased out of engagement with said first ratchet wheel, a solenoid coupled to said first pawl to advance said pawl with the energization of said solenoid, a first switch actuated in response to the torso of an occupant of said seat being disposed rearwardly of a predetermined position relative to the back of said seat, a second switch actuated in response to the application of said belt to said seat occupant and means responsive to the actuation of both said first and second switches for energizing said solenoid.
Dependencies are inferred from the claim text.