Power actuated rocking furniture mechanism

• US 8,459,732 B2
• Filed: 04/13/2010
• Issued: 06/11/2013
• Est. Priority Date: 04/13/2010
• Status: Active Grant

• Current Assignee: La-Z-Boy Incorporated
• Original Assignee: La-Z-Boy Incorporated
• Inventors: Harwood, Eric B., Marshall, Richard E., Mero, Jr., Michael R., LaPointe, Larry P., Adams, Chad E.
• Primary Examiner(s): BARFIELD, ANTHONY DERRELL
• Application Number:
  US12/759,184
• Publication Number:
  US 20110248547A1
• Time in Patent Office: 1,155 Days
• Field of Search: 297/85.M, 297/260.2, 297/330
• US Class Current: 297/85.M
• CPC Class Codes: A47C 1/0355 actuated by linkages, e.g. lazy-tongs mechanisms
• CPC Class Codes: A47C 3/02 Rocking chairs specially for children A47D13/10

Abstract

A rocking furniture member having an electrically powered actuation mechanism includes a frame and an actuation mechanism connected to the frame. The actuation mechanism includes an extendable and retractable leg rest assembly. A drive assembly connected to the actuation mechanism having an electric motor operates to move the leg rest assembly between a retracted position and any of a plurality of extended positions inclusive including a fully extended position by a command provided by an occupant of the furniture member. A rotation member connecting the actuation mechanism to the frame permits an occupant induced rocking motion of the actuation mechanism with respect to the frame at least when the leg rest assembly is in the retracted position.

Claims

1. A rocking furniture member having an electrically powered actuation mechanism, comprising:

a frame;

an actuation mechanism connected to the frame, the actuation mechanism including an extendable and retractable leg rest assembly;

an electrically powered drive assembly connected to the actuation mechanism operating to move the leg rest assembly between retracted and extended positions; and

a rotation member of a resilient polymeric material positioned between the actuation mechanism and the frame permitting an occupant induced rocking motion of the actuation mechanism with respect to the frame at least when the leg rest assembly is in the retracted position.

2. The rocking furniture member of claim 1, wherein the rotation member defines a rectangular shape.

3. The rocking furniture member of claim 1, wherein the actuation mechanism includes a drive rod movable by the drive assembly to extend and retract the leg rest assembly.

4. The rocking furniture member of claim 1 wherein the actuation mechanism includes:

a drive rod movable by the drive assembly to extend and retract the leg rest assembly;

at least one drive link fixedly connected to the drive assembly; and

a drive rod connecting link fixedly connected to the drive rod and rotatably connected to the at least one drive link, the drive rod connecting link permitting both axial rotation and forward and rearward translation of the drive rod.

5. The rocking furniture member of claim 1, wherein the drive assembly is rotatably connected to the actuation mechanism by a single pin.

6. A rocking furniture member having an electrically powered actuation mechanism, comprising:

a frame;

an actuation mechanism connected to the frame, the actuation mechanism including an extendable and retractable leg rest assembly;

an electrically powered drive assembly connected to the actuation mechanism operating to move the leg rest assembly between retracted and extended positions; and

a rotation member positioned between the actuation mechanism and the frame permitting an occupant induced rocking motion of the actuation mechanism with respect to the frame at least when the leg rest assembly is in the retracted position;

wherein the actuation mechanism includes a drive rod movable by the drive assembly to extend and retract the leg rest assembly and opposed sequencing plates each having an elongated channel individually receiving one end of the drive rod, the drive rod being axially rotated within the elongated channel of each of the sequencing plates during extension and retraction of the leg rest assembly.

7. The rocking furniture member of claim 6, further including a hinge pin assembly rotatably connecting the drive assembly to the actuation mechanism, wherein the drive rod is translated within the elongated channel of both sequencing plates coincident with axial rotation of the drive rod during extension and retraction of the leg rest assembly by rotation of the drive assembly about the hinge pin assembly.

8. A rocking furniture member having an electrically powered actuation mechanism, comprising:

a frame;

an actuation mechanism connected to the frame, the actuation mechanism including an extendable and retractable leg rest assembly;

an electrically powered drive assembly connected to the actuation mechanism operating to move the leg rest assembly between retracted and extended positions; and

a rotation member positioned between the actuation mechanism and the frame permitting an occupant induced rocking motion of the actuation mechanism with respect to the frame at least when the leg rest assembly is in the retracted position; and

a drive rod of the actuation assembly movable by the drive assembly to extend and retract the leg rest assembly;

wherein the drive assembly includes;

a gear housing rotatably connected to the actuation mechanism; and

a carriage assembly slidably translatable with respect to the gear housing, the drive rod connected to the carriage assembly such that a rotational movement of the gear housing during sliding translation of the carriage assembly causes both the axial rotation and translation of the drive rod.

9. A rocking furniture member having an electrically powered actuation mechanism, comprising:

a frame;

an actuation mechanism connected to the frame, the actuation mechanism including an extendable and retractable leg rest assembly;

an electrically powered drive assembly connected to the actuation mechanism operating to move the leg rest assembly between retracted and extended positions; and

a rotation member positioned between the actuation mechanism and the frame permitting an occupant induced rocking motion of the actuation mechanism with respect to the frame at least when the leg rest assembly is in the retracted position;

wherein the actuation mechanism includes;

a drive rod movable by the motorized drive assembly to extend and retract the leg rest assembly; and

opposed sequencing plates each having an elongated channel individually receiving one end of the drive rod, the drive rod translating within the elongated channel of both sequencing plates coincident with axial rotation of the drive rod during extension and retraction of the leg rest assembly.

10. The rocking furniture member of claim 9, wherein the actuation mechanism includes first and second end walls of the elongated channel of each sequencing plate and a lowest elevation slot position positioned elevationally below both the first and second opposed end walls.

11. The rocking furniture member of claim 10, wherein:

the drive rod is positioned proximate to the first end wall with the leg rest assembly in the fully retracted position; and

the leg rest assembly reaches the fully extended position when the drive rod is positioned at the lowest elevation slot position.

12. The rocking furniture member of claim 11, further comprising left and right seat back support members positioned between a fully upright position and a fully reclined position inclusive, the seat back support members being positioned in the fully upright position until the drive rod reaches the lowest elevation slot position after which further actuation of the drive assembly displaces the drive rod without axial rotation from the lowest elevation slot position toward the second end wall, the seat back support members positioned in the fully reclined position when the drive rod is positioned proximate to or in contact with the second end wall.

13. A rocking furniture member having an electrically powered actuation mechanism, comprising:

a frame;

an actuation mechanism connected to the frame, the actuation mechanism including an extendable and retractable leg rest assembly;

a drive assembly connected to the actuation mechanism having an electric motor operating to move the leg rest assembly between a retracted position and any of a plurality of extended positions inclusive including a fully extended position by a command provided by an occupant of the furniture member;

a rotation member connecting the actuation mechanism to the frame permitting an occupant induced rocking motion of the actuation mechanism with respect to the frame at least when the leg rest assembly is in the retracted position;

a pantograph link of the leg rest assembly rotatably connected to the mechanism, the pantograph link having an engagement slot; and

an engagement pin connected to an extension link, the engagement pin releasably received in the engagement slot to extend and retract the pantograph link and thereby the leg rest assembly when the extension link is displaced;

wherein when an obstruction item in a return path of the leg rest assembly returning toward the fully retracted position is contacted, an orientation of the engagement slot permits release of the engagement pin from the engagement slot allowing the leg rest assembly to return by gravity toward the fully retracted position after removal of the obstruction item from the return path.

14. The rocking furniture member of claim 13, wherein the actuation mechanism further includes a drive rod movable by the drive assembly to extend and retract the leg rest assembly the drive rod rotatably connected to the extension link.

15. The rocking furniture member of claim 14, wherein the actuation mechanism further includes opposed sequencing plates each having an elongated channel individually receiving one end of the drive rod, the drive rod translating within the elongated channel of both sequencing plates coincident with axial rotation of the drive rod during extension and retraction of the leg rest assembly.

16. A rocking furniture member having an electrically powered actuation mechanism, comprising:

a frame;

an actuation mechanism connected to the frame, the actuation mechanism including an extendable and retractable leg rest assembly;

a drive assembly connected to the actuation mechanism having an electric motor operating to move the leg rest assembly between a retracted position and any of a plurality of extended positions inclusive including a fully extended position by a command provided by an occupant of the furniture member;

a rotation member connecting the actuation mechanism to the frame permitting an occupant induced rocking motion of the actuation mechanism with respect to the frame at least when the leg rest assembly is in the retracted position;

a pantograph link of the leg rest assembly rotatably connected to the mechanism, the pantograph link having an engagement slot;

an engagement pin connected to an extension link, the engagement pin releasably received in the engagement slot to extend and retract the pantograph link and thereby the leg rest assembly when the extension link is displaced; and

a polymeric attachment frictionally connected to the pantograph link.

17. The rocking furniture member of claim 16, wherein the polymeric attachment includes a semi-spherical shaped wall inner face defining the engagement slot.

18. The rocking furniture member of claim 16, wherein the polymeric attachment further includes at least one raised shoulder defining a clearance span smaller than a diameter of the engagement slot such that insertion of the engagement pin into the engagement slot requires elastic deformation of the at least one raised shoulder.

19. The rocking furniture member of claim 17, wherein the polymeric semi-spherical shaped wall inner face defines an arc greater than 180 degrees.