초록 ▼

A folding passenger seat assembly for a motor vehicle comprises a seat cushion and a backrest portion. The backrest portion includes a backrest frame having a first end and a second end each pivotally supported about a folding axis. A first latch selectively locks the first end of the backrest frame

A folding passenger seat assembly for a motor vehicle comprises a seat cushion and a backrest portion. The backrest portion includes a backrest frame having a first end and a second end each pivotally supported about a folding axis. A first latch selectively locks the first end of the backrest frame in the vertical use position and a second latch selectively locks the second end of the backrest frame in the vertical use position. A remote actuator simultaneously unlocks both the first and second latches so that the backrest frame can be pivoted between use and folded positions. The second latch includes a bell-shaped jam key which is pivoted on a pintle about a latch axis spaced parallel from the folding axis. An abutment seat is fixed relative to the folding axis for engaging the jam key when the backrest frame is locked in the vertical use position. The jam key has a convex engagement surface having a circular curvature centered about the latch axis, while the abutment seat includes a concave engagement surface having a circular curvature centered about the latch axis only when the backrest frame is in the use position. The distance between the latch axis and the abutment seat diminishes as the backrest frame is moved from the use position toward the folded position. As a result, the jam key is compressed between the pintle and the abutment seat if the backrest frame is forced toward the folded position while the first and second latches are locked.

대표청구항 ▼

[ What is claimed is:] [1.] A folding backrest for a passenger seat assembly in a motor vehicle, said assembly comprising: a backrest frame having a first end and a second end; a first hinge operatively associated with said first end of said backrest frame and a second hinge operatively associated w

[ What is claimed is:] [1.] A folding backrest for a passenger seat assembly in a motor vehicle, said assembly comprising: a backrest frame having a first end and a second end; a first hinge operatively associated with said first end of said backrest frame and a second hinge operatively associated with said second end of said backrest frame hinges pivotally supporting said backrest frame, about a folding axis for movement between a vertical use position and a folded position; a first latch associated with said first end of said backrest frame for selectively locking said backrest frame in said vertical use position; a second latch operatively associated with said second end of said backrest frame for selectively locking said backrest frame in said vertical use position; said second latch including a jam key pivotally carried on a latch axis spaced parallel from said folding axis for movement between extended and retracted positions, an abutment seat fixed relative to said second latch for engaging said jam key when said backrest frame is locked in said vertical use position; and an actuator for simultaneously unlocking said first and second latches such that said jam key is pivoted about said latch axis out of engagement with said abutment seat prior to moving said backrest frame toward said folded position and wherein the distance between said latch axis and said abutment seat diminishes as said backrest frame is moved from said use position toward said folded position such that said jam key becomes compressed as said backrest frame is pivoted while said backrest frame is locked in said vertical use position.