US 4,904,003 AGranted

Latch device for inclinable back rest cushion mounted in seatback

AssigneesIkeda Bussan Co., Ltd., Ohi Seisakusho Co., Ltd.

InventorsHiroshi Yamazaki, Toshiyuki Hara, Yuji Tanaka, Takayuki Mouri

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Abstract

Herein disclosed is a latch device for latching an inclinable bark rest cushion to a seatback of a seat when the cushion is snugly received in a tunnel formed in the seatback. The latch device comprises a striker secured to the seatback, a latch member pivotally mounted in the cushion, a spring incorporated with the latch member to bias the same in a direction to achieve a latched engagement between the latch member and the striker, an actuation member pivotally mounted in the cushion in a manner to push and pivot the latch member in a releasing direction to cancel the latched engagement between the latch member and the striker when pivoted in a given direction, means having a pin portion which is projectable into a travelling way of the actuation member thereby to interrupt the actuation member from pivoting in the releasing direction, a base member secured to a rigid portion of the cushion and having an opening through which the pin portion passes, and a mechanism for manually actuating the pin portion from a back side of the back rest cushion.

Claims21

Dependent claims

In a seatback which is provided, in a tunnel thereof, with an inclinable back rest cushion,

a latch device for latching said back rest cushion to said seatback when said cushion is snugly received in said tunnel, which comprises:
a striker secured to said seatback;
a latch member pivotally mounted in said back rest cushion in a manner to latchingly engage with said striker upon said cushion being received in said tunnel;
first means for biasing said latch member in a direction to achieve the latched engagement between said latch member and said striker;
an actuation member pivotally mounted in said back rest cushion in a manner to push and pivot said latch member in a releasing direction to cancel the latched engagement between said latch member and said striker when pivoted in a give direction;
second means for interrupting said actuation member from pivoting in said releasing direction, said second means including a stopper pin which is projectable into a travelling way of said actuation member, a pivoting lever pivotally mounted in said back rest cushion and having one end pivotally connected to said stopper pin, and an elongated rod having one end pivotally connected to the other end of said pivoting lever, said elongate rod having the other end which is exposed to the outside of said back rest cushion through an opening formed in a back portion of said back rest cushion;
a base member secured to a rigid portion of said back rest cushion and having an opening through which said pin portion passes;
and
third means for manually actuating said second means form a back side of said back rest cushion.

6 more elements

In a seatback which is provided, in a tunnel thereof, with an inclinable back rest cushion,

a latch device for latching said back rest cushion to said seatback when said cushion is snugly received in said tunnel, which comprises:
a striker secured to said seatback;
a latch member pivotally mounted in said back rest cushion in a manner to latchingly engage with said striker upon said cushion being received in said tunnel;
first means for biasing said latch member in a direction to achieve the latched engagement between said latch member and said striker;
an actuation member pivotally mounted in said back rest cushion in a manner to push and pivot said latch member in a releasing direction to release the latched engagement between said latch member and said striker when pivoted in a given direction;
second means including a stopper pin which is projectable into a travelling way of said actuation member from pivoting in said releasing direction;
a base member secured to a rigid portion of said back rest cushion and having an opening through which said pin portion passes;
third means for manually actuating said second means from a back side of said back rest cushion;
and
fourth means which causes said second means to make said stopper pin move in a snap action manner by a turn-over spring;
wherein said latch member and said actuation member are arranged to pivot about a common axis;
said common axis is an axis possessed by a pivot pin which is secured to said base member;
said stopper pin having one end which passes through the opening of said base member;
and said second means further comprises
a pivoting lever pivotally mounted in said back rest cushion, said pivoting lever having one end pivotally connected to said stopper pin;
and
an elongate rod having one end pivotally connected to the other end of said pivoting lever, said elongated rod having the other end which is exposed to the outside of said back rest cushion to be manipulated.

14 more elements

In a seatback which is provided, in a tunnel thereof, with an inclinable back rest cushion,

a latch device for latching said back rest cushion to said seatback when said cushion is snugly received in said tunnel, which comprises:
a striker secured to said seatback;
a latch member pivotally mounted in said back rest cushion in a manner to latchingly engage with said striker upon said cushion being received in said tunnel;
first means for biasing said latch member in a direction to achieve the latched engagement between said latch member and said striker;
an actuation member pivotally mounted in said back rest cushion in a manner to push and pivot said latch member in a releasing direction to release the latched engagement between said latch member and said striker when pivoted in a given direction;
second means including a stopper pin which is projectable into a travelling way of said actuation member from pivoting in said releasing direction;
a base member secured to a rigid portion of said back rest cushion and having an opening through which said pin portion passes;
third means for manually actuating said second means from a back side of said back rest cushion;
and
fourth means which causes said second means to make said stopper pin move in a snap action manner;
wherein said latch member and said actuation member are arranged to pivot about a common axis;
said common axis is an axis possessed by a pivot pin which is secured to said base member;
said second means further comprises an elongate rod having one end which passes through the opening of said base member and the other end which is exposed to the outside of said back rest cushion to be manipulated;
and
said base member is formed with a bent portion having another opening through which said elongate rod passes.

12 more elements

Dependencies are inferred from the claim text.