Linear recliner with memory seatback dump mechanism

• US 5,707,112 A
• Filed: 05/03/1996
• Issued: 01/13/1998
• Est. Priority Date: 05/03/1996
• Status: Expired due to Fees

• Current Assignee: Magna Lomason Corp. (Magna International Incorporated)
• Original Assignee: Magna Lomason Corp. (Magna International Incorporated)
• Inventors: Zinn, Marshal Duane
• Primary Examiner(s): Cuomo, Peter M.
• Assistant Examiner(s): BARFIELD, ANTHONY DERRELL
• Application Number:
  US08/642,478
• Time in Patent Office: 620 Days
• Field of Search: 297/362.14, 297/378.1, 297/378.12, 297/362.12, 297/375, 297/376
• US Class Current: 297/378.14
• CPC Class Codes: B60N 2/232 provided with memory locks

Abstract

A seat recliner having a linear recliner mechanism and a dump mechanism is disclosed. The linear retractor device is provided for adjusting the reclined position of the seatback. The dump mechanism includes a bracket mounted to the seat bottom which has a pair of elongated guide slots formed in two sidewall portions thereof. A carriage is slidably mounted in the elongated guide slots of the bracket and is coupled to the linear retractor mechanism for permitting sliding movement thereof between a memory position and a free position relative to the bracket. A latch device is provided for releasably securing the linear retractor mechanism in the memory position. When secured in its memory position, linear recliner mechanism can be selectively actuated to adjust the reclined position of the seatback between upright and fully-reclined positions. When the latch device is actuated, the linear retractor mechanism can be slid toward its free position in response to movement of the seatback toward its dumped position. Return of seatback from its dumped position causes linear recliner mechanism to again be secured in its memory position so as to locate and retain the seatback in its previously reclined position.

Claims

1. A seat recliner for angularly moving a seatback relative to a seat bottom, said seat recliner comprising:

a linear recliner mechanism adapted to be interconnected between the seatback and the seat bottom, said linear recliner mechanism is normally operable in a locked mode to retain the seatback in a reclined position relative to the seat bottom anti which can be selectively shifted into a released mode to permit adjustment of the reclined position of the seatback/and

a dump mechanism adapted to slidably connect said linear recliner mechanism to the seat bottom for movement between a first position and a second position, said dump mechanism is operable in a latched mode to hold said linear recliner mechanism in said first position whereat said linear recliner mechanism can be selectively actuated to adjust the recliner position of the seatback, and said dump mechanism is operable in an unlatched mode for permitting movement of said linear recliner mechanism to said second position while said linear recliner mechanism is maintained in its locked mode which results in movement of the seatback from its reclined position to a forward dumped position.

2. The seat recliner of claim 1 wherein said dump mechanism includes a bracket adapted to be secured to the seat bottom and on which said linear recliner mechanism is supported for movement between said first and second positions, a dump latch assembly normally operable in said latched mode for holding said linear recliner mechanism in said first position and which is operable in said unlatched mode to release said linear recliner mechanism for movement toward said second position, and a dump actuator for selectively shifting said dump latch assembly from its latched mode into its unlatched mode.

3. The seat recliner of claim 1 wherein said dump latch assembly includes a latch member supported from said bracket for movement between a first position and a second position, and a biasing mechanism for biasing said latch member toward its first position, said latch member operable in its first position to establish said latched mode and in its second position to establish said unlatched mode, said dump actuator connected to said latch member for moving said latch member to its second position in opposition to said biasing mechanism.

4. The seat recliner of claim 1 wherein said dump mechanism is normally operable in its latched mode for retaining said linear recliner mechanism in said first position with respect to the seat bottom such that a seat occupant can selectively adjust the reclined position of the seatback by selectively shifting said linear recliner mechanism into its released mode, and wherein said dump mechanism is selectively operable in its unlatched mode for releasing said linear recliner mechanism such that subsequent angular movement of the seatback towards its dumped position causes movement of said linear recliner mechanism relative to the seat bottom from said first position to said second position.

5. The seat recliner of claim 4 wherein movement of the seatback from its dumped position causes said linear recliner mechanism to move from its second position to its first position whereat said dump mechanism automatically is shifted into its latched mode for retaining said linear recliner mechanism in said first position and thereby locating the seatback in its previously reclined position.

6. The seat recliner of claim 4 further comprising a dump actuator for selectively shifting said dump mechanism from its latched mode into its unlatched mode.

7. The seat recliner of claim 1 wherein said linear recliner mechanism includes a housing adapted to be coupled to the seat bottom for selective movement from said first position to said second position, a recliner rod having a first end supported by said housing and a second end adapted to be coupled to the seatback, a recliner latch assembly normally operable in a locked mode for inhibiting movement of said recliner rod relative to said housing for holding the seatback in a desired reclined position, said recliner latch assembly is further operable in a released mode for permitting movement of said recliner rod relative to said housing for adjusting the reclined position of the seatback, and a recline actuator for permitting said recliner latch assembly to be selectively shifted from its locked mode into its released mode.

8. A seat recliner for use in a seat assembly having a seatback supported for pivotal movement relative to a seat bottom, said seat recliner comprising:

a linear recliner mechanism operable for adjusting the reclined position of the seatback, said linear recliner mechanism including a housing, a recliner rod having a first end supported by said housing and a second end adapted to be coupled to the seatback, a recliner latch assembly normally operable in a locked mode for inhibiting movement of said recliner rod relative to said housing for holding the seatback in a desired reclined position, said recliner latch assembly further operable in a released mode for permitting movement of said recliner rod relative to said housing for adjusting the reclined position of the seatback, and a recline actuator for permitting said recliner latch assembly to be selectively shifted from its locked mode into its released mode; and

a dump mechanism operable for moving the seatback between its reclined position and a forwardly dumped position, said dump mechanism including a bracket adapted to be secured to the seat bottom and on which said housing is supported for sliding movement of said linear recliner mechanism between a first position and a second position, a dump latch assembly normally operable in a latched mode for latching said linear recliner mechanism in said first position and in an unlatched mode for permitting movement of said linear recliner mechanism between said first and second positions in response to movement of the seatback between its reclined and dumped positions with said recliner latch assembly maintained in its locked mode, and a dump actuator for permitting said dump latch assembly to be selectively shifted from its latched mode into its unlatched mode.

9. The seat recliner of claim 8 wherein said dump latch assembly is normally operable in its latched mode for retaining said linear recliner mechanism in said first position with respect to the seat bottom whereat a seat occupant can selectively adjust the reclined position of the seatback by selectively shifting said recliner latch assembly into its released mode, and wherein said dump latch assembly is operable in its unlatched mode for releasing said recliner latch assembly such that subsequent angular movement of said seatback towards its dumped position causes sliding movement of said linear recliner mechanism relative to said bracket from its first position to its second position.

10. The seat recliner of claim 9 wherein movement of the seatback from its dumped position toward its previously reclined position causes said linear recliner mechanism to slide from its second position to its first position whereat said dump latch assembly is automatically shifted into its latched mode for retaining said linear recliner mechanism in said first position and thereby retaining the seatback in its previously reclined position.

11. The seat recliner of claim 8 wherein said bracket includes a guide slot formed therein, and said dump mechanism further includes means for retaining said housing in said guide slot for movement between said first and second positions.

12. The seat recliner of claim 11 wherein said retaining means includes a pin extending through said housing and said guide slot.

13. The seat recliner of claim 8 wherein said dump latch assembly includes a latch member supported on said bracket for movement between first and second positions, and a biasing mechanism for biasing said latch member toward its first position, said latch member operable in its first position to establish said latched mode and in its second position to establish said unlatched mode, said dump actuator connected to said latch member for moving said latch member to its second position in opposition to said biasing mechanism.

14. A vehicle seat comprising:

a seat bottom;

a seatback supported for pivotal movement relative to said seat bottom;

a linear recliner mechanism operable for adjusting the reclined position of said seatback, said linear recliner mechanism including a housing, a recliner rod having a first end supported by said housing and a second end coupled to the seatback, a recliner latch assembly normally operable in a locked mode for inhibiting movement of said recliner rod relative to said housing for holding said seatback in a desired reclined position, and in a released mode for permitting movement of said recliner rod relative to said housing for adjusting the reclined position of said seatback, and a recline actuator for shifting said recliner latch assembly from said locked mode into said released mode; and

a dump mechanism operable for moving said seatback between its reclined position and a forwardly dumped position, said dump mechanism including a bracket secured to said seat bottom with said housing supported on said bracket for moving said linear recliner mechanism between a first position and a second position, a dump latch assembly normally operable in a latched mode for latching said linear recliner mechanism in said first position, and in an unlatched mode for permitting movement of said linear recliner mechanism between said first and second positions in response to movement of the seatback between its reclined and dumped positions with said linear recliner mechanism maintained in its locked mode, and a dump actuator for shifting said dump latch assembly into said unlatched mode.

15. The vehicle seat of claim 14 wherein said dump mechanism is normally operable in said latched mode for retaining said linear recliner mechanism in said first position with respect to said seat bottom such that a seat occupant can selectively adjust the reclined position of said seatback by selectively shifting said linear recliner mechanism into said released mode, and wherein said dump mechanism is selectively operable in said unlatched mode for releasing said linear recliner mechanism such that subsequent angular movement of said seatback towards its dumped position causes movement of said linear recliner mechanism relative to said bracket from its first position to its second position.

16. The vehicle seat of claim 15 wherein movement of said seatback from its dumped position causes said linear recliner mechanism to move from its second position to its first position whereat said dump mechanism is automatically is shifted into said latched mode for retaining said linear recliner mechanism in said first position and thereby retain said seatback in its previously reclined position.

17. A seat assembly comprising:

a seat bottom;

a seatback supported for pivotal movement relative to said seat bottom;

a housing supported on said seat bottom for movement between a first position and a second position;

a recliner rod having a first end supported by said housing and a second end coupled to said seatback;

a recliner latch assembly normally operable in a locked mode for inhibiting movement of said recliner rod relative to said housing, said recliner latch assembly is further operable in a released mode for permitting movement of said recliner rod relative to said housing;

a recline actuator for permitting said recliner latch assembly to be selectively shifted from its locked mode into its released mode;

a dump latch assembly normally operable in a latched mode for latching said housing in said first position whereat said recline actuator can be actuated to shift said recliner latch assembly into its released mode to adjust the reclined position of said seatback, and said dump latch assembly is operable in an unlatched mode for permitting movement of said housing from said first to said second positions while said recliner latch assembly is maintained in its locked mode which results in movement of said seatback from its reclined position to a forward dumped position; and

a dump actuator for permitting said dump latch assembly to be selectively shifted from its latched mode into its unlatched mode.

18. The seat assembly of claim 17 wherein said seat bottom includes a guide slot and said housing is coupled to said guide slot for sliding movement between said first and second positions.

19. The seat assembly of claim 17 wherein movement of said seatback from its dumped position toward its last reclined position causes said housing to move from said second position to said first position whereat said dump latch assembly is automatically shifted into its latched mode for retaining said housing in said first position and thereby retaining said seatback in its last reclined position.

20. The seat assembly of claim 17 wherein said dump latch assembly includes a latch member supported on said seat bottom for movement between first and second positions, and a biasing mechanism for biasing said latch member toward said first position, said latch member operable in its first position to establish said latched mode and in its second position to establish said unlatched mode, said dump actuator connected to said latch member for moving said latch member to its second position in opposition to said biasing mechanism.