| 摘要 |
<p>A LOCKING DEVICE FOR A HEIGHT-ADJUSTABLE HEADREST, PARTICULARLY FOR A MOTOR VEHICLE SEAT, COMPRISING A BULLET LATCH (1), COMPRESSION SPRING (2) AND SET SCREW (3). THE LOCKING DEVICE IS HOUSED WITHIN A BARREL (4) FITTED TO ONE OF A PAIR OF PARALLEL CYLINDRICAL SLEEVES (8) HOUSED WITHIN THE INNER FRAME OF THE BACKREST OF THE SEAT. THE HEAD OF SAID BULLET LATCH (1) CORRESPONDS DIAMETRICALLY TO DETENTS (6) ALIGNED LONGITUDINALLY ALONG THE SHAFT OF ONE OF A PAIR OF CYLINDRICAL ANCHOR RODS (5) EXTENDING FROM THE BOTTOM OF THE HEADREST CUSHION. THE HEADREST IS LOCKED IN POSITION WHEN SAID ANCHOR RODS (5) ARE INSERTED INTO FREE SLEEVES (7), WHICH ARE IN TURN INSERTED INTO SAID CYLINDRICAL SLEEVES (8) AND SAID BULLET LATCH (1) ENGAGES WITH A DETENT (6) THUS SECURING THE ANCHOR RODS (5). THE COMPRESSION SPRING (2) PREVENTS SAID BULLET LATCH (1) FROM BEING DISENGAGED FROM A DETENT (6) AND THE RESISTANCE OF SAID COMPRESSION SPRING (2) CAN BE ADJUSTED MANUALLY BY TIGHTENING SAID SET SCREW (3) TO ACHIEVE THE DESIRED DEGREE OF RESISTANCE. THE LOCKING DEVICE CAN BE UN-LOCKED WHEN SUFFICIENT FORCE CORRESPONDING TO OR EXCEEDING THE RESISTANCE LEVEL OF SAID COMPRESSION SPRING (2) IS EXERTED BY A USER SUCH THAT SAID BULLET LATCH (1) IS DISENGAGED FROM A DETENT (6).</p> |
