WO2006088896A1 - Dispositif d'inclinaison du siege - Google Patents

Dispositif d'inclinaison du siege Download PDF

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Publication number
WO2006088896A1
WO2006088896A1 PCT/US2006/005226 US2006005226W WO2006088896A1 WO 2006088896 A1 WO2006088896 A1 WO 2006088896A1 US 2006005226 W US2006005226 W US 2006005226W WO 2006088896 A1 WO2006088896 A1 WO 2006088896A1
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WO
WIPO (PCT)
Prior art keywords
eccentric
recliner
seat
gear
segments
Prior art date
Application number
PCT/US2006/005226
Other languages
English (en)
Inventor
Michael Ray Bittner
Original Assignee
Johnson Controls Technology Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Johnson Controls Technology Company filed Critical Johnson Controls Technology Company
Publication of WO2006088896A1 publication Critical patent/WO2006088896A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • B60N2/225—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by cycloidal or planetary mechanisms
    • B60N2/2252—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by cycloidal or planetary mechanisms in which the central axis of the gearing lies inside the periphery of an orbital gear, e.g. one gear without sun gear

Definitions

  • the present inventions relate generally to systems for and methods of adjusting the positioning of a seat back, particularly a vehicle seat back, relative to a seat bottom (e.g., seat recliner systems, recliner mechanisms, etc.). More particularly, the present inventions relate to vehicle seat recliners utilizing an eccentric to change the relative positioning between a first recliner component and a second recliner component.
  • vehicle seat recliners utilizing an eccentric to change the relative positioning between a first recliner component and a second recliner component.
  • Rotary recliner systems employing a pair of mating gears (i.e., an inner gear and an outer gear) rotating relative to each other for selective positioning of a seat back relative to a seat base are known.
  • An example of such a recliner system includes a first component connected with a seat bottom and second component connected to a seat back.
  • the first and second components are rotatably connected with each other in an eccentric relation about a common pivot shaft.
  • One of the components carries an inner spur gear, having outwardly extending gear teeth, while the other component carries an outer ring gear having inwardly extending teeth.
  • the inner spur gear has at least one less gear tooth than the outer ring gear and has a diameter which is less than the diameter of the outer ring gear by at least the radial height of the outer gear teeth.
  • the eccentric relation between the first and second components is provided by an eccentric configured to bias the inner spur gear in one direction radially relative to the outer ring gear. This results in meshing of gear teeth one side and a clearance between the gear on the opposite side. Rotation of the eccentric causes the area of teeth mesh to move circumferentially around the outer ring gear whereby the difference in the number of gear teeth produces rotation of the inner spur gear relative the outer ring gear. [0005] After adjustment of the seat back, the seat back is held in its adjusted position by the eccentric maintaining the meshing of the inner spur gear and the outer ring gear.
  • the recliner system is self locking in the sense that forces applied to the seat back can generally not cause a rotation of the eccentric and movement of the seat back.
  • One embodiment of the invention relates to a seat recliner comprising a first member supporting an internal gear and configured to be coupled at one of a seat back and a seat bottom and a second member supporting a second gear configured to engage the internal gear.
  • the second member is configured to be coupled at the other one of the seat back and the seat bottom.
  • the seat recliner further comprises an annular member rotatably supported relative to the first member and the second member and first and second eccentric segments supported by the annular member. The first and second eccentric segments are configured to support the first member and the second member in an eccentric relation.
  • a vehicle seat comprising a first recliner component having a collar and coupled to one of a seat back and a seat bottom and a second recliner component rotatable relative to the first recliner component.
  • the second recliner is coupled to the other of the seat back and the seat bottom.
  • the vehicle seat further comprises an annular carrier disposed about the collar, first and second eccentric segments supported by the carrier, and a biasing element configured to urge the first and second eccentric segments in opposed directions.
  • the first and second eccentric segments are configured to support the first member and the second member in an eccentric relation.
  • FIGURE 1 is a perspective view schematically illustrating a seat with a recliner system.
  • FIGURE 2 is a perspective view of a recliner system shown according to one exemplary embodiment.
  • FIGURE 3 is a perspective view of the recliner system of FIGURE 2, shown without a drive cap.
  • FIGURE 4 is a front view of the recliner system of FIGURE 2, shown without the drive cap.
  • FIGURE 5 is an exploded perspective view of the recliner system of FIGURE 2.
  • FIGURE 6 is a cross-section view of the recliner system of FIGURE 2, taken along the line 6-6.
  • FIGURE 7 is a cross-section view of the recliner system of FIGURE 2, taken along the line 7-7.
  • FIGURE 8a is a front view of a first eccentric member shown according to an exemplary embodiment.
  • FIGLlRE Sb is a front view of a second eccentric member shown according to an exemplary embodiment.
  • FIGURE 9 is an exploded perspective view of a recliner system according to another exemplary embodiment.
  • FIGURE 10 is a front view of the recliner system of FIGURE 9, shown without a drive cap.
  • FIGURE 11 is a detailed front view of the recliner system of FIGURE 9.
  • FIGUElE 12 is an exploded perspective view of a recliner system shown according to another exemplary embodiment.
  • FIGURE 13a is a front view of a first eccentric segment shown according to an exemplary embodiment.
  • FIGURE 13b is a front view of a second eccentric segment shown according to an exemplary embodiment.
  • FIGURE 14 is a front view of a carrier shown according to an exemplary embodiment.
  • FIGURE 15 is a partial front view of the recliner system of FIGURE 12, showing the recliner system in a free play reduction position.
  • FIGURE 16 is a partial front view of the recliner system of FIGURE 12, showing the recliner system in a free play position.
  • FIGURE 17 is a detailed front view of the recliner system of FIGURE 12.
  • FIGURE 18 is an exploded perspective view of a recliner system shown according to another exemplary embodiment.
  • FIGURE 19 is a front view of an eccentric segment shown according to an exemplary embodiment.
  • FIGURE 20 is a front view of a carrier shown according to an exemplary embodiment.
  • FIGURE 21 is a front view of the recliner system of FIGURE 1 S, shown without a drive plate.
  • FIGURE 22 is a front view of the recliner system of FIGURE 18 without a drive plate.
  • FIGURE 23 is a rear view of the recliner system of FIGURE 18.
  • Recliner 10 is configured to minimize "free play” or clearance within the system after recliner 10 has been adjusted.
  • Recliner 10 generally includes a plurality of eccentric segments (preferably a pair) rotatably supported in an area defined by two peripheral (preferably both circumferential) surfaces.
  • a biasing element urges the eccentric segments in opposed directions relative to each other about the peripheral surfaces to minimize "free play” in the system after recliner 10 has been adjusted.
  • Recliner 10 is adjusted by selectively rotating a drive system (either in a clockwise or counterclockwise direction) which engages (directly or indirectly) at least one of the eccentric segments to overcome the force exerted by the biasing element and causing one or more of the eccentric segments to move into a position that increases "free play.”
  • the eccentric segments are disposed in adjacent parallel planes and the biasing element urges the eccentric segments in opposed directions which move the eccentric segments away from each other for achieving a locked or free play reduction position.
  • the eccentric segments are disposed in substantially the same plane and the biasing element urges the eccentric segments in opposed directions which move the eccentric segments towards each other for achieving a locked or free play reduction position.
  • FIGURE 1 schematically shows recliner 10 being configured for use with a vehicle seat 100.
  • Recliner 10 is configured for selectively controlling the angle of inclination of a seat back 104 (e.g., backrest, etc.) relative to a seat bottom 102 (e.g., seat cushion, seat base, etc.).
  • a seat back 104 e.g., backrest, etc.
  • a seat bottom 102 e.g., seat cushion, seat base, etc.
  • vehicle seat systems e.g., front seats, second or third row seats, bucket seats, bench seats, etc.
  • Recliner 10 is intended to be positioned along at least one longitudinal side of vehicle seat 100.
  • a single recliner 10 may be used with a seat, or alternatively, a pair of recliners 10 may be used.
  • a first recliner may be positioned on a first side (e.g., outboard side, outer side, left-hand side, etc.) of vehicle seat 100 and a second recliner may be positioned on a second side (e.g., inboard side, inner side, right-hand side, etc.) of vehicle seat 100.
  • the first recliner can be operably coupled to the second recliner by a transmission rod (e.g., crosstalk tube, cross tube, etc.), shown in phantom as a transmission rod 101.
  • Transmission rod 101 may comprise multiple segment or components, or alternatively, may comprise a one- piece member.
  • Configuring transmission rod 101 as a one-piece member may allow for improved synchronization between the first recliner and the second recliner by eliminating response delays that may be introduced from the use of multiple components.
  • Recliner 10 is coupled to a user interface (not shown) for allowing a user to selectively control the positioning of seat back 104 relative to seat bottom 102.
  • the user interface may be a mechanical interface (e.g., a knob, operating wheel, lever, etc.) allowing a user to manually actuate the recliner, or alternatively, recliner 10 may be an electric interface (e.g., switch, push-button, touch sensor, etc.) allowing a user to electrically actuate a driver (e.g., electric motor, etc.) operably coupled to the recliner and/or a transmission rod coupled to the recliner. It should be understood that recliner 10 may be used with any suitable mechanical and/or electric user interface.
  • a driver e.g., electric motor, etc.
  • recliner 10 generally includes a first recliner component 12 and a second recliner component 14.
  • First recliner component 12 is adapted to be coupled to one of seat back 104 and seat bottom 102
  • second recliner component 14 is adapted to be coupled to the other of seat back 104 and seat bottom 102.
  • first recliner component 12 is configured to be coupled to seat bottom 102
  • second recliner component 14 is configured to be coupled to seat back 104.
  • First recliner component 12 and second recliner component 14 are rotatably coupled to one another about a drive system 90 detailed below.
  • the term "coupled” means the joining or combining of two members directly or indirectly to one another. Such joining or combining may be stationary in nature or movable in nature. Such joining may be achieved with the two members or the two members and any additional intermediate members being integrally formed as a single unitary body with one another or with the two members or the two members and any additional intermediate member being attached to one another. Such joining or combining may be permanent in nature or alternatively may be removable or releasable in nature.
  • first recliner component 12 is shown as including an offset portion or projection 28 having an outer circumferential surface formed with a plurality (e.g., an array, etc.) of outwardly extending gear teeth 32, forming a first or inner gear 34 (e.g., spur gear, external gear, etc.).
  • Inner gear 34 is concentric with a bore 35 of first recliner component 12.
  • Second recliner component 14 includes an offset portion or recess 18 concentric about a bore 21 (shown in FIGURE 9).
  • Recess 18 includes an inner circumferential surface formed with a plurality (e.g., an array, etc.) of inwardly projecting gear teeth 24, forming a second or outer gear 26 (e.g., a ring gear, internal gear, etc.).
  • Second recliner component 14 is further shown as including a projection (e.g., sleeve, flange, bushing, etc.), shown as a collar 36, concentrically aligned with outer gear 26 and defining bore 21 (shown in FIGURE 9).
  • Collar 36 may be integrally formed with second recliner component 14, or alternatively, collar 36 may be a separate component configured to be coupled to second recliner component 14.
  • collar 36 may be provided by a bushing coupled to second recliner component 14 using a welding process, mechanical fasteners, press fit, or any other suitable coupling technique.
  • inner gear 34 has a diameter which is less than the diameter of outer gear 26.
  • the diameter of inner gear 34 is less than the diameter of outer gear 26 by at least the radial height of gear teeth 24 of outer gear 26.
  • the difference in the number of teeth between outer gear 26 and inner gear 34 is at least one tooth, with outer gear 26 having a greater number of teeth than inner gear 34.
  • First recliner component 12 is placed adjacent to second recliner component 14 with gear teeth 32 on one side of inner gear 34 in meshing engagement with gear teeth 24 on the corresponding side of outer gear 26.
  • Such a configuration results in an eccentricity of inner gear 34 relative to an axis 20 and collar 36.
  • An eccentric drive system 50 is provided and rotatably supported relative to collar 36 to hold inner gear 34 in mesh with outer gear 26. With inner gear 34 eccentric to axis 20 and collar 36, gear teeth 32 of inner gear 34 mesh with gear teeth 24 of outer gear 26 on one side, while a clearance exists between the gear teeth on the opposite side.
  • Eccentric drive system 50 is shown as generally comprising a plurality of components (e.g., crescents, spacers, sectors, etc.), including a first eccentric segment 52 and a second eccentric segment 54.
  • First and second eccentric segments 52, 54 are disposed in an area defined by an upper peripheral surface, shown as an outer circumferential surface 33 of collar 36, and a lower peripheral surface, shown as an inner circumferential surface 37 of first recliner component 12.
  • a bushing 38 is shown as being aligned with bore 35 of first recliner component 12.
  • Bushing 38 constitutes the inner circumferential surface of first recliner component 12.
  • Bushing 38 provides a bearing surface 39 having a relatively low surface friction (e.g., a relatively low resistive force of friction) that allows for a relatively constant coefficient of friction between first and second eccentric segments 52, 54 and bushing 38 regardless of the load on seat back 104.
  • Bushing 38 may be coupled to first recliner component 12 using any of a variety of suitable techniques, including but not limited to, press fit, welding, mechanical fasteners, etc. According to various alternative embodiments, bushing 38 may be eliminated and the inner circumferential wall of bore 35 may be used or otherwise configured to provide a bearing surface.
  • FIGURES 8a and 8b show first and second eccentric segments 52, 54 as being substantially identical components, with first eccentric segment 52 being aligned in a first orientation and second eccentric segment 54 being aligned in a second orientation that is transposed (e.g., inverted, flipped, rotated, opposite, etc.) relative to the first orientation.
  • First and second eccentric segments 52, 54 are shown as having a generally sectorial shape that is defined by opposed circumferential surfaces (first or inner circumferential surfaces 51, 53 and second or outer circumferential surfaces 55, 57).
  • Liner circumferential surfaces 51, 53 are configured to rotate about outer circumferential surface 33 of collar 36, while outer circumferential surfaces 55, 57 are configured to rotate about the inner circumferential surface (e.g., bearing surface 39) of first recliner component 12.
  • One or more of inner circumferential surfaces 51, 53 or outer circumferential surfaces 55, 57 of first and second eccentric segments 52, 54 may be relatively continuous and/or constant radius surfaces, or alternatively, one or more of the surfaces may include gaps, notches, other spacing, and/or varying radius (e.g., one or more of the surfaces may include a portion that is partially undercut, etc.).
  • first and second eccentric segments 52, 54 include first portions 56, 58 having outer surfaces 60, 62 with arc lengths greater than the arc lengths of outer surfaces 68, 70 of second portions 64, 66.
  • First portions 56, 58 include free ends 59, 61 respectively, while second portions 64, 66 include free ends 63, 65 respectively.
  • first and second eccentric segments 52, 54 are supported by inner circumferential surfaces 51, 53 about collar 36 and outer surfaces 60, 68 and 62, 70 which slidably contact bearing surface 39 of bushing 38.
  • a gap may exist between bearing surface 39 of bushing 38 and outer surfaces 60, 68 and 62, 70 of first and second eccentric segments 52, 54 as recliner 10 is being adjusted.
  • the radial height of first portions 56, 58 is substantially the same as the radial height of second portions 64, 66, but alternatively may be slightly greater or less than the radial height of the second portions so that first and second eccentrics are wedged shaped or crescent shaped.
  • Notches or slots 76, 78 are provided in first and second eccentric segments 52, 54 and separate first portions 56, 58 from second portions 64, 66. Slots 76, 78 are configured to accept a biasing member SO (shown in FIGURE 5).
  • Biasing member 80 is provided to urge first and second eccentric segments 52, 54 into the locked or free play reduction position. According to an exemplary embodiment, biasing member 80 urges first and second eccentric segments 52, 54 in first and second directions, preferably opposed circumferential directions of the circumferential surface of collar 36, which moves first and second eccentric segments 52, 54 away from each other (e.g., reduces the amount of overlap (if any) between first eccentric segment 52 and second eccentric segment 54).
  • Biasing member 80 is shown as a torsion spring having a first end 81 configured to be disposed in slot 76 and second end 83 configured to be disposed in slot 78, but alternatively may be any other suitable biasing element.
  • first and second eccentric segments 52, 54 are of relatively constant thickness, and have a combined thickness that is substantially equivalent to the axial length of collar 36 and/or the axial depth of inner circumferential surface 37 of first recliner component 12 (shown in FIGURE 6).
  • the combined thickness of first and second eccentric segments 52, 54 may be greater than or less than the axial length of the collar and/or the axial depth of the inner circumferential surface of the first recliner component, and may have varying thicknesses.
  • FIGURE 6 illustrates that first and second eccentric segments 52, 54 are not aligned in the same plane, but rather are aligned in parallel planes.
  • First and second segments 52, 54 are shown as being adjacently aligned relative to each other in an axial direction along collar 36, with first eccentric segment 52 shown as being aligned in a first plane D-D and second eccentric system 54 shown as being aligned in a second plane E-E.
  • First plane D-D is offset from and adjacent to second plane E-E.
  • Providing first and second eccentric segments 52, 54 in axially offset parallel planes advantageously allows first and second eccentric segments 52, 54 to be at least partially overlapped (i.e., stacked) with each other.
  • Overlapping first and second eccentric segments 52, 54 increases the available paths of movement for the eccentric segments which can provide flexibility when designing the locking angle of the recliner. Overlapping first and second eccentric segments 52, 54 also allows for the portion of the eccentric acting on outer circumferential surface 33 of collar 36 and inner circumferential surface 37 of first recliner component 12 when in the free play introduction position to be minimized or concentrated thereby allowing for an increased amount of free play to be introduced to the system while recliner 10 is being adjusted.
  • first eccentric segment 52 is configured to rotate in first plane D-D
  • second eccentric segment 54 is configured to rotate in second plane E-E.
  • First and second eccentric segments 52, 54 rotate between a first position or "free play introduction position” (e.g., adjusting position, etc.) and a second position or “free play reduction position” (e.g., locking position, etc.).
  • first and second eccentric segments 52, 54 are at least partially overlapping, and are preferably substantially overlapping. Controlling the amount of overlap may control the amount of free play being introduced as recliner 10 is being adjusted.
  • free end 59 of first eccentric segment 52 is substantially aligned with free end 65 of second eccentric segment 54 and free end 61 of second eccentric segment is substantially aligned with free end 63 of first eccentric segment 52 while recliner 10 is being adjusted.
  • the length (i.e., arc length) of the gear mesh between outer gear 26 and inner gear 34 is minimized. This occurs because the overall circumferential length of eccentric drive system 50 (the combined circumferential lengths of first and second eccentric segments 52, 54) is minimized which causes the force exerted by eccentric drive system 50 between first recliner component 12 and second recliner component 14 to be relatively concentrated. Minimizing the length of the gear mesh between outer gear 26 and inner gear 34 improves the ease at which inner gear 34 can rotated relative to outer gear 26 by introducing free play.
  • first eccentric segments 52, 54 distance themselves relative to each other (due to the force exerted by biasing member 80) by moving in opposed circumferential directions. According to the embodiment illustrated, in the second position, first and second eccentric segments 52, 54 partially overlap, however the amount of overlap is less than in the first position. According to the various alternative embodiments, there may be no overlap between the first and second eccentric segments 52, 54 while in the second position.
  • the length (i.e., arc length) of the gear mesh between outer gear 26 and inner gear 34 is increased to reduce free play (i.e., increasing the number of gear teeth 24 in meshing engagement with gear teeth 34 and/or the depth of engagement between gear teeth 24 and gear teeth 34 limits the amount of free play).
  • First and second eccentric segments 52, 54 may be configured to slidably engage each other (along their respective side surfaces) while moving between the free play introduction position and the free play reduction position, or alternatively, a gap or space may be provided in the axial direction along collar 36 separating the eccentric segments. [0062] When adjusting seat back 104, first and second eccentric segments 52, 54 rotate within their respective planes in the same circumferential direction as each other along collar 36 to move the location of gear teeth mesh between inner gear 34 and outer gear 26. Once adjusted, first and second eccentric segments 52, 54 rotate in opposed directions to minimize free play once seat back 104 has been adjusted.
  • first and second eccentric segments 52, 54 are moved in opposed directions that move the eccentric segments away from each other. Rotation of first and second eccentric segments 52, 54 in opposed directions is provided by biasing member 80. Rotation of first and second eccentric segments 52, 54 in the same direction is facilitated by use of a drive system 90 (shown in FIGLTRE 5).
  • Drive system 90 receives an input torque (either clockwise or counterclockwise) representative of desire to adjust the positioning of seat back 104 and transfers this torque to rotate first and second eccentric segments 52, 54.
  • the input torque may be applied to transmission rod 101 (shown in FIGURE 1) coupled to recliner 10, or may be applied to another component (e.g., a mechanical and/or electrical actuator, etc.) coupled to drive system 90.
  • Drive system 90 may comprise a plurality of components, or alternatively may be provided by a single component.
  • drive system 90 comprises a drive cap 92 for receiving and distributing an input torque.
  • Drive cap 92 generally includes a first end 94 and second end 96.
  • First end 94 functions as a guide configured to be inserted into bore 21 of collar 36 for allowing drive cap 92 to rotate relative to first and second recliner components 12, 14.
  • first end 94 is shaped as a cylindrical rod or shaft configured to engage collar 36.
  • a retaining member shown as a push nut 93, engages first end 94 to secure drive cap 92 to first and second recliner components 12, 14.
  • drive cap 92 may be secured using any of a variety of suitable retaining techniques (e.g., locking pin, washers, tabs, etc.).
  • Second end 96 is shown as including a bore 91 configured to receive the end of transmission rod 101 (shown in FIGURE 1) operably coupled to a second recliner 10.
  • Transmission rod 101 may include one or more projections extending in a radial direction for securing itself to drive cap 92.
  • bore 91 may include one or more slots 89 (e.g., grooves, channels, etc.) configured to receive configured to receive any projections extending from transmission rod 101.
  • bore 91 includes four slots 89 that are equally spaced-apart.
  • bore 91 may have any number of slots, provided in any of a variety of positions.
  • bore 91 for receiving a transmission rod may be eliminated.
  • a user interface e.g., a handle, lever, operating wheel, etc.
  • Drive cap 92 further includes a drive portion 98 having contact surfaces 95 and 97 (shown in FIGURE 5) configured to engage first and second eccentric segments 54, 52 respectively.
  • Drive portion 98 is rotatably supported in an area defined by the outer circumferential surface 33 of collar 36 and the inner circumferential surface 37 of first recliner component 12, or bearing surface 39 of bushing 38, (e.g., the same boundaries defining where first and second eccentric segments 52, 54 are disposed).
  • Drive portion 98 overlaps a portion of collar 36 and is offset a distance radially from the guide portion defining first end 94.
  • Drive portion 98 occupies space not occupied by first and second eccentric segments 52, 54 when in the second position.
  • first eccentric segment 52 engages free end 59 of first portion 56 of first eccentric segment 52 causing first eccentric segment 52 to rotate towards second eccentric segment 54.
  • location of the gear mesh between outer gear 26 and inner gear 34 does not change until contact surface 97 further engages free end 65 of second portion 66 of second eccentric portion 54 causing first and second eccentric segments 52, 54 to rotate together in the same (e.g., clockwise) circumferential direction.
  • the location of the gear mesh may begin to change when one of first and second eccentric segments 52, 54 is moving towards the other eccentric segment before the corresponding contact surface of drive portion 98 engages both eccentric segments.
  • biasing member 80 urges first and second eccentric segments 52, 54 in opposed circumferential directions and returns first and second eccentric segments 52, 54 to the free play reduction position wherein the eccentric segments are relatively spaced apart from each other.
  • FIGURES 9 through 11 show eccentric drive system 50 and components thereof according to a second exemplary embodiment.
  • Such an embodiment further includes a third eccentric segment or member, shown as a carrier 110.
  • Carrier 110 replaces outer circumferential surface 33 of collar 36 as the structure (i.e., the inner eccentric supporting surface) configured to movably support (e.g., carry, etc.) and/or define the path of movement for first and second eccentric segments 52, 54 about their inner circumferential surfaces 31, 33 respectively.
  • the addition of carrier 110 to eccentric drive system 50 allows the locking angle of recliner 10 to be more easily adjusted or "tuned" in comparison to the exemplary embodiment shown in FIGURES 3 through 8b.
  • carrier 110 is shown as a generally annular member (e.g., sleeve, ring, bushing, etc.) provided with an opening or bore 112, a first outer circumferential surface 114, and a second outer circumferential surface 116.
  • Carrier 110 further includes a structure (not shown) that allows the rotation of drive cap 92 to rotate carrier 110 and subsequently rotate first and second eccentric segments 52, 54.
  • carrier 110 may include at least one of an aperture (e.g., recess, slot, opening, hole, etc.) and/or a projection (e.g., a stepped-out portion, tab, etc.) configured to engage a complementary structure on drive cap 92 to provide such a function.
  • an aperture e.g., recess, slot, opening, hole, etc.
  • a projection e.g., a stepped-out portion, tab, etc.
  • Carrier 110 may be provided as a separate member or component (as shown) of eccentric drive system 50, or alternatively, may be integrally formed (e.g., provided as one- piece, etc.) with another component of eccentric drive system 50 and/or recliner 10.
  • carrier 110 may be integrally formed with a portion of drive cap 92. Integrally forming carrier 110 with another component of recliner 10, such as drive cap 92, may simplify manufacturing by reducing the number of components to be assembled and/or may reduce costs by reducing the number of components being stored, shipped, handled, etc.
  • First outer circumferential surface 114 is the surface that replaces outer circumferential surface 33 of collar 36 as the surface configured to movably support first and second eccentric segments 52, 54 about their inner circumferential surfaces 31, 33.
  • first outer circumferential surface 114 is shown schematically as a substantially circular surface having a center point C2 and a radius R2.
  • the radius of first outer circumferential surface 114 may vary along its length.
  • first outer circumferential surface 114 may have a first radius at each end and may have a second radius for a portion between the two ends.
  • center point C2 is different than a center point Cl (i.e., the center point of collar 36) so that the rotational path of movement of first and second eccentric segments 52, 54 is different than if first and second eccentric segments were moving along outer circumferential surface 33 of collar 36.
  • R2 is greater than Rl (i.e., the radius of collar 36) and C2 is beneath or lower than Cl.
  • R2 is less than Rl and C2 is above or higher than Cl.
  • the trailing ends (i.e., second portions 64, 66) of first and second eccentric segments 52, 54 would be the first to engage bearing surface 39 as opposed to the leading ends (i.e., first portions 56, 58).
  • C2 and/or R2 may be may be equal to Cl and/or Rl, or provided in any number of proportional relationships.
  • Second outer circumferential surface 116 functions as the surface configured to slidably engage inner circumferential surface 37 of first recliner component 12 or an intermediate component, such as bearing surface 39 of bushing 38.
  • transition regions shown as a first contact surface 118 and a second contact surface 120, exist between first outer circumferential surface 114 and second circumferential surface 116.
  • first contact surface 118 and second contact surface 120 are configured to engage first and/or second eccentrics 52, 54 when carrier 110 is selectively rotated.
  • first contact surface 118 and second contact surface 120 of carrier 110 replace drive cap 92 (particularly contact surfaces 95, 97 of drive portion 98) as the structures that engage first and second eccentric segments 52, 54.
  • the transition regions between first outer circumferential surface 114 and second outer circumferential surface 116 may include a substantially linear portions (as shown), or alternatively, may include a curvilinear portion, or a combination of both linear portions and curvilinear portions.
  • First circumferential surface 114 of carrier 110 has a thickness 122 (shown in FIGURE 9) sufficient to support first and second eccentric segments 52, 54 when first and second eccentric segments 52, 54 are stacked in their respective axially offset adjacent parallel planes.
  • thickness 122 of carrier 110 may vary for different seating applications.
  • thickness 122 is approximately equal to the thickness of inner circumferential surface 37 of first recliner component 12, but according to the various alternative embodiments may be slightly greater than or less than the thickness of inner circumferential surface 37.
  • Carrier 110 is movably supported relative to first recliner component 12 and second recliner component 14, and is preferably adapted for rotational movement relative to first recliner component 12 and second recliner component 14.
  • carrier 110 is rotatably supported by second recliner component 14 by inserting collar 36 through bore 112.
  • bore 112 is shaped and dimensioned to correspond to the shape and dimension of collar 36 with a diameter sized slightly larger than the diameter of collar 36.
  • other members may be positioned between collar 36 and bore 112 of carrier 110.
  • a bearing surface may be provided therebetween which may provide for improved (e.g., consistent, etc.) rotational movement of carrier 110 about collar 36.
  • carrier 110 to recliner 10 advantageously allows the cam or locking angle of recliner 10 to be altered (e.g., tuned, etc.) to accommodate different seating applications.
  • the locking angle of recliner 10 controls how far first and second eccentric segments 52, 54 must rotate in opposed circumferential directions before achieving the free play reduction position and the "tightness" of the lock once the free play reduction position is achieved.
  • the locking angle can be altered by varying the rotational path of movement of first and second eccentric segments 52, 54, and with the addition of carrier 110 can be altered by varying the inner eccentric supporting surface.
  • the locking angle is an angle Al between a line A- A and a line B-B.
  • Line A-A forms a right angle with a line drawn from a theoretical center point C3 of outer circumferential surfaces 51, 53 of first and second eccentric segments 52, 54 to a theoretical point Y on the circumferential surface of bore 35.
  • Line B-B forms a right angle with a line drawn from a center point C2 of first outer circumference surface 114 of earner 110 to the same point Y.
  • a center point Cl of collar 36 is also shown in the FIGURE for reference.
  • the locking angle of recliner 10 would be the same as the locking angle of the exemplary embodiment of recliner 10 shown in FIGURES 4 through 9b.
  • Such a locking angle is shown in FIGURE 11 as an angle A2, and is the angle between line A-A and a line D-D (i.e., a line forming a right angle with a line drawn from center point Cl of collar 36 to point Y).
  • a tighter "lock” can be achieved with Al in comparison to A2 which may be desirable for certain seating applications.
  • the exemplary embodiment of eccentric drive system 50 shown in FIGURES 9 through 11 adjusts seat back 104 when an input torque is applied to drive cap 92.
  • Drive cap 92 of the exemplary embodiment shown in FIGURES 9 through 11 is similar to drive cap 92 of the exemplary embodiment shown in FIGURES 3 through 8b, except that it does not include drive portion 98 (the function of drive portion 98 is replaced by carrier 110). Instead, drive cap 92 includes a structure (not shown) configured to engage carrier 110 to transfer the rotational movement of drive cap 92 to carrier 110.
  • biasing member 80 urges first and second eccentric segments 52, 54 in opposed directions to increase the length of gear mesh between outer gear 26 and inner gear 34 thereby reducing clearance or free play.
  • first and second eccentric segments 52, 54 rotate about first outer circumferential surface 114 of carrier 110.
  • the free play reduction position is achieved before first and second eccentric segments 52, 54 engage first and second contact surfaces 118, 120 respectively.
  • the free play reduction position is achieved when first and second eccentric segments 52, 54 engage first and second contact surfaces 118, 120 respectively.
  • the rotation of drive cap 92 in a clockwise direction in turn causes the rotation carrier 110 in the clockwise direction.
  • first contact surface 118 of carrier 110 Upon rotation, first contact surface 118 of carrier 110 subsequently engages free end 59 of first portion 56 of first eccentric segment 52 causing first eccentric segment 52 to rotate towards second eccentric segment 54.
  • the location of the gear mesh between outer gear 26 and inner gear 34 does not change until first contact surface 118 further engages free end 65 of second portion 66 of second eccentric portion 54 causing first and second eccentric segments 52, 54 to rotate together in the same (e.g., clockwise) circumferential direction about first circumferential surface 114 of carrier 110.
  • the location of the gear mesh may begin to change when one of first and second eccentric segments 52, 54 is moving towards the other eccentric segment before the corresponding contact surface of carrier 110 engages both eccentric segments.
  • FIGURES 12 through 17 show eccentric drive system 50 and components thereof according to a third exemplary embodiment.
  • eccentric drive system 50 is shown to include a first eccentric segment 202, a second eccentric segment 204, a carrier 206, a biasing member 208, and a drive cap 210.
  • the free play reduction position (e.g., locked condition, etc.) is achieved by moving first and second eccentric segments 202, 204 in opposed circumferential directions so that first and second eccentric segments 202, 204 move toward each other rather than away from each other.
  • first and second eccentric segments 202, 204 preferably rotate within the same plane as opposed to rotating in parallel planes offset in an axial direction.
  • FIGURES 13a and 13b show first and second eccentric segments 202, 204, respectively, as including first ends 212, 214, each having a first radial height, and second ends 216, 218, each having a second radial height.
  • the radial height of first ends 212, 214 is less than the radial height of second ends 216, 218.
  • First ends 212, 214 and second ends 216, 218 are joined by outer surfaces 220, 222 and inner surfaces 224, 226.
  • outer surfaces 220, 222 and inner surfaces 224, 226 are circumferential surfaces having relatively constant radiuses. Such a configuration provides for a pair of wedge- shaped members.
  • the radiuses of outer surfaces 220, 222 vary near first ends 212, 214 to form an undercut.
  • the radiuses of outer surfaces 220, 222 at first ends 212, 214 are less than the radiuses of the remaining portions of outer surfaces 220, 222.
  • first and second eccentric segments 202, 204 are rotatably supported by inner surfaces 224, 226 about carrier 206, while outer surfaces 220, 222 slidably contact bearing surface 39 of bushing 38.
  • first and second eccentric segments 202, 204 are provided within the same plane, but alternatively may be provided in parallel planes.
  • First and second eccentric segments 202, 204 are positioned so that first end 212 of first eccentric segment 202 faces first end 214 of second eccentric segment 204.
  • carrier 206 is shown as a generally annular member (e.g., sleeve, ring, bushing, etc.) provided with an opening or bore 228, an outer circumferential surface 230, a first eccentric support surface 232 for supporting first eccentric segment 202, and a second eccentric support surface 234 for supporting second eccentric segment 204.
  • first eccentric support surface 232 and second eccentric support surface 234 are curved surfaces, but alternatively may be linear surfaces.
  • Carrier 206 may be provided as a separate member or component (as shown) of eccentric drive system 50, or alternatively, may be integrally formed (e.g., provided as one- piece, etc.) with another component of eccentric drive system 50 and/or recliner 10.
  • carrier 206 may be integrally formed with a portion of drive cap 210.
  • Carrier 206 has a thickness 207 (shown in FIGURE 12) sufficient to support first and second eccentric segments 202, 204. Depending on the thickness of the first and second eccentric segments 202, 204 and sizing restraints of the system, thickness 207 of carrier 206 may vary for different seating applications. Preferably, thickness 207 is approximately the thickness of inner circumferential surface 37 of first recliner component 12, but according to various alternative embodiments may be slightly greater than or less than the thickness of inner circumferential surface 37.
  • Carrier 206 is movably supported relative to first recliner component 12 and second recliner component 14, and adapted for rotational movement relative to first recliner component 12 and second recliner component 14.
  • carrier 206 is rotatably supported by second recliner component 14 by inserting collar 36 through bore 228.
  • an intermediate member may be positioned between collar 36 and bore 228 of earlier 206.
  • a bearing surface may be provided therebetween which may provide for improved (e.g., consistent, etc.) rotational movement of carrier 206 about collar 36.
  • first eccentric support surface 232 and second eccentric support surface 234 are circumferential surfaces having the same center point C2 and radius R2.
  • the transition region between first eccentric support surface 232 and second eccentric support surface 234 has a radius different than radius R2.
  • center point C2 is different than a center point Cl (i.e., the center point bore 228 and collar 36) so that the rotational path of movement of first and second eccentric segments 202, 204 is different than if first and second eccentric segments were moving along outer circumferential surface 33 of collar 36.
  • R2 is greater than Rl (i.e., the radius of bore 228) and C2 is above or higher than Cl.
  • R2 and the positioning of C2 relative to Cl may be varied to achieve a desired rotational path of movement for first and second eccentric segments 202, 204.
  • bore 228 includes an undercut portion 229 so that bore 228 first contacts outer circumferential surface 33 of collar 36 at approximately 45 degrees from Cl. According to various alternative embodiments, the positioning of undercut portion 229 may be varied so that bore 228 first contacts outer circumferential surface 33 of collar 36 anywhere along bore 228.
  • Outer circumferential surface 230 functions as the surface configured to slidably engage imier circumferential surface 37 of first recliiier component 12 or an intermediate component, such as bearing surface 39 of bushing 38. Transition regions between outer circumferential surface 230 and first eccentric support surface 232 and second eccentric support surface 234 are shown as a first surface 236 and a second surface 238, respectively.
  • biasing member 208 is adapted for biasing first and second eccentric segments 202, 204 into the free play reduction position.
  • Biasing member 208 is shown as including a first biasing element 209 and a second biasing element 211.
  • first and second biasing elements 209, 211 are integrally formed as a one-piece unitary member, but alternatively, may be provided as separate members.
  • Biasing member 208 is shown as a torsion spring, with first and second biasing elements 209, 211 configured as relatively flat resilient members.
  • biasing member 208 and/or biasing elements 209, 211 may be any suitable member for urging first and second eccentric segments 202, 204.
  • First biasing element 209 is shown disposed between first surface 236 and second end 216 of first eccentric segment 202 and second biasing element 209 is disposed between second surface 238 and second end 218 of second eccentric segment 204.
  • First and second biasing elements 209, 211 act on first and second surfaces 236, 238 to bias first and second eccentric segments 202, 204 towards each other.
  • FIGURE 15 shows recliner 10 in the free play reduction position (e.g., locked condition, etc.) wherein first and second biasing elements 209, 211 are in relatively relaxed positions
  • FIGURE 16 shows recliner 10 in the free play introduction position (e.g., operating condition, etc.) wherein first and second biasing elements 209, 211 are in relatively compressed positions.
  • first and second biasing elements 209, 211 urge first and second eccentric segments 202, 204 towards each other.
  • drive cap 210 generally includes a first end 240 and second end 242.
  • First end 240 functions as a guide configured to be inserted into bore 21 of collar 36 for allowing drive cap 210 to rotate relative to first and second recliner components 12, 14.
  • first end 240 is shaped as a cylindrical rod or shaft configured to engage collar 36.
  • a retaining member shown as a push nut 244, engages first end 240 to secure drive cap 210 to first and second recliner components 12, 14.
  • drive cap 210 may be secured using any of a variety of suitable retaining techniques (e.g., locking pin, washers, tabs, etc.).
  • Second end 242 is shown as including a bore 246 configured to receive the end of transmission rod 101 (shown in FIGURE 1) operably coupled to a second recliner 10.
  • bore 246 for receiving a transmission rod may be eliminated.
  • a user interface e.g., a handle, lever, operating wheel, etc.
  • first end 242 may be coupled to first end 242 to allow drive cap 210 and subsequently recliner 10 to be adjusted.
  • Drive cap 210 further includes a drive portion, shown as a drive tab 248.
  • Drive tab 248 has a first drive surface 250 and a second drive surface 252 configured to engage first ends 212, 214 of first and second eccentric segments 202, 204 respectively.
  • Drive tab 248 is rotatably supported in an area defined by carrier 206 and the inner circumferential surface 37 of first recliner component 12, or bearing surface 39 of bushing 38, (e.g., the same boundaries defining where first and second eccentric segments 202, 204 are disposed).
  • Drive tab 248 overlaps a carrier 206 and is offset a distance radially from the guide portion defining first end 240.
  • seat back 104 is configured to be adjusted by applying an input torque to drive cap 210 causing the drive cap to rotate in either a clockwise or counterclockwise direction.
  • biasing member 208 urges first and second eccentric segments 202, 204 in opposed directions (towards each other) to increase the length of gear mesh between outer gear 26 and inner gear 34 thereby reducing clearance or free play.
  • first eccentric segment 202 moves about first support surface 232 of carrier 206
  • second eccentric segment 204 moves about second support surface 234 of carrier 206.
  • the free play reduction position is achieved when first and second eccentric segments 202, 204 engage bearing surface 39 and lock recliner 10 into place.
  • drive cap 210 in a counterclockwise direction in turn causes drive tab 248 to rotate in the counterclockwise direction.
  • drive tab 248 subsequently engages first end 212 of first eccentric segment 202 which overcomes the force exerted by first biasing element 209 and begins to rotate in the counterclockwise direction (i.e., a direction that distances first eccentric segment 202 from second eccentric segment 204).
  • the rotation of first eccentric segment 202 causes carrier 206 to rotate, which in turn causes second eccentric segment 204 to rotate.
  • the location of the gear mesh between outer gear 26 and inner gear 34 does not change until both first and second eccentric segments 202, 204 are rotating.
  • the location of the gear mesh may begin to change once first eccentric segment 202 begins to rotate.
  • eccentric drive system 50 and components thereof are shown according to a fourth exemplary embodiment. Similar to the third exemplary embodiment detailed above with reference to FIGURES 12 through 17, eccentric drive system 50 is shown to include first eccentric segment 202, second eccentric segment 204, carrier 206, and biasing member 208. Also, the free play reduction position (e.g., locked condition, etc.) is achieved by moving first and second eccentric segments 202, 204 in opposed circumferential directions relative to carrier 206 so that first and second eccentric segments 202, 204 move toward each other rather than away from each other.
  • FIGLTRE 19 shows first eccentric segment 202 according to an exemplary embodiment. First eccentric segment 202 is larger than first eccentric segment 202 illustrated in FIGURE 13 a. Increasing the size of first eccentric segment 202 provides additional contact surface between the eccentric segment and bearing surface 39. Such a configuration may prolong the useful life of first eccentric segment 202 and/or bearing surface 39.
  • first eccentric segment 202 extends between a first end 212 having a first radial thickness and a second end 216 having a second radial thickness.
  • the radial thickness at first end 212 may be substantially the same as the radial thickness at second end 216 or alternatively may be less than the radial thickness at second end 216 (thereby forming a wedge-shaped segment).
  • First end 212 and second end 216 are joined by an outer surface 220 and an inner surface 224.
  • Outer surface 220 and inner surface 224 are circumferential surfaces having relatively constant radiuses.
  • inner surface 224 has a radius that varies near first end 212 to form an undercut. In such an embodiment, the radial thickness at first end 212 is slightly less than the radial thickness at second end 216.
  • first eccentric segment 202 is rotatably supported by inner surface 224 about carrier 206, while outer surface 220 slidably contacts bearing surface 39 of bushing 38.
  • First eccentric segment 202 is sized such that it is in contact with approximately one-third of the outer surface of carrier 206. According to various alternative embodiments, first eccentric segment 202 may be sized such that is in contact with any percentage of the outer surface of carrier 206. It should be noted that while only first eccentric 202 has been described in detail with reference to FIGURE 19, second eccentric segment 204 is substantially the same as first eccentric segment 202. According to the embodiment illustrated, first and second eccentric segments 202, 204 are provided within the same plane, but alternatively may be provided in parallel planes. First and second eccentric segments 202, 204 are positioned so that first end 212 of first eccentric segment 202 faces first end 214 (shown in FIGURE 18) of second eccentric segment 204.
  • carrier 206 is shown as a generally annular member (e.g., sleeve, ring, bushing, etc.) provided with an opening or bore 228, an outer circumferential surface 230, a first eccentric support surface 232 for supporting first eccentric segment 202, and a second eccentric support surface 234 for supporting second eccentric segment 204.
  • first eccentric support surface 232 and second eccentric support surface 234 are curved surfaces, but alternatively may be linear surfaces or include both linear and curved portions.
  • Carrier 206 has a thickness 207 (shown in FIGURE 18) sufficient to support first and second eccentric segments 202, 204.
  • thickness 207 of carrier 206 may vary for different seating applications.
  • thickness 207 is approximately the thickness of inner circumferential surface 37 of first recliner component 12, but according to various alternative embodiments may be slightly greater than or less than the thickness of inner circumferential surface 37.
  • Carrier 206 is movably supported relative to first recliner component 12 and second recliner component 14, and adapted for rotational movement relative to first recliner component 12 and second recliner component 14.
  • earner 206 is rotatably supported by second recliner component 14 by inserting collar 36 through bore 228.
  • an intermediate member may be positioned between collar 36 and bore 228 of carrier 206.
  • a bearing surface may be provided therebetween which may provide for improved (e.g., consistent, etc.) rotational movement of carrier 206 about collar 36.
  • first eccentric support surface 232 and second eccentric support surface 234 are circumferential surfaces having the same center point C2 and radius R2.
  • the radius (e.g., R2) and the center point (e.g., C2) remain substantially constant until reaching an end opposite outer circumferential support surface 230.
  • a gap or cutout 260 separates first eccentric support surface 232 and second eccentric support surface 234 at an end opposite outer circumferential support surface 230.
  • gap 260 provides a transition region between first eccentric support surface 232 and second eccentric support surface 234. As first eccentric support surface 232 and second eccentric support surface 234 approach gap 260, the surfaces begin to straighten out.
  • Gap is defined by a pair of end walls 262, 264 and a circumferential surface 266 having a radius different than radius R2.
  • a center point Cl i.e., the center point of bore 228, is different than center point C2.
  • C2 is above or higher than Cl.
  • R2 and the positioning of C2 relative to Cl may be varied to achieve a desired rotational path of movement for first and second eccentric segments 202, 204.
  • bore 228 includes an undercut portion (shown as a cutout 229) which controls where bore 228 first contacts outer circumferential surface 33 of collar 36.
  • bore 228 may first contact outer circumferential surface 33 of collar 36 at approximately 45 degrees from Cl.
  • the positioning of cutout 229 may be varied so that bore 228 first contacts outer circumferential surface 33 of collar 36 anywhere along bore 228.
  • Outer circumferential surface 230 functions as the surface configured to slidably engage inner circumferential surface 37 of first recliner component 12 or an intermediate component, such as bearing surface 39 of bushing 38. Transition regions between outer circumferential surface 230 and first eccentric support surface 232 and second eccentric support surface 234 are shown as a first surface 236 and a second surface 238, respectively.
  • biasing member 208 is adapted for biasing first and second eccentric segments 202, 204 into the free play reduction position. Biasing member 208 is shown as including a first biasing element 209 and a second biasing element 211.
  • first and second biasing elements 209, 211 are integrally formed as a one- piece unitary member, but alternatively, may be provided as separate members.
  • Biasing member 208 is shown as a torsion spring, with first and second biasing elements 209, 211 configured as relatively flat resilient members.
  • biasing member 2OS may be any suitable member for urging first and second eccentric segments 202, 204.
  • first biasing element 209 is shown disposed between first surface 236 and second end 216 of first eccentric segment 202 and second biasing element 209 is disposed between second surface 238 and second end 218 of second eccentric segment 204.
  • First and second biasing elements 209, 211 act on first arid second surfaces 236, 238 to bias first ends 212, 214 of first and second eccentric segments 202, 204 towards each other.
  • eccentric drive system 50 further comprises an insert or plug 270 and a drive plate 272.
  • the combination of plug 270 and drive plate 272 replaces drive cap 210 and push nut 244 of the third exemplary embodiment.
  • Plug 270 generally includes a first end 240 and second end 242.
  • First end 240 functions as a guide configured to be inserted into bore 21 of collar 36 for allowing plug 270 to rotate relative to first and second recliner components 12, 14.
  • first end 240 is shaped as a cylindrical rod or shaft configured to engage collar 36.
  • Drive plate 272 functions as a nut which engages first end 240 to secure plug 270 to first and second recliner components 12, 14.
  • First end 240 of plug 270 includes an array of outwardly extending projections or splines 274. Splines 274 are equally spaced apart about the outer surface of first end 240.
  • Drive plate 272 includes a structure (e.g., cutout, etc.) configured to receive splines 274. According to various alternative embodiments, plug 270 may be secured using any of a variety of suitable retaining techniques (e.g., locking pin, washers, tabs, etc.).
  • First end 240 further includes a bore 246 configured to receive the end of transmission rod 101 (shown in FIGURE 1) operably coupled to a second recliner 10.
  • bore 246 includes a plurality of spaced-apart slots 276 configured to receive a projection or spline of transmission rod 101. Slots 276 may be equally spaced apart (as shown), or may spaced-apart in some other pattern.
  • bore 246 for receiving a transmission rod may be eliminated.
  • a user interface e.g., a handle, lever, operating wheel, etc.
  • plug 270 and/or drive plate 272 may be directly coupled to plug 270 and/or drive plate 272 to facilitate the adjustment of recliner 10.
  • Drive plate 272 is a relatively flat and rigid member having a drive portion, shown as a drive tab 248.
  • Tab 248 has a first drive surface 250 and a second drive surface 252 configured to engage first ends 212, 214 of first and second eccentric segments 202, 204 respectively.
  • Drive tab 248 is rotatably supported in an area defined by carrier 206 and the inner circumferential surface 37 of first recliner component 12, or bearing surface 39 of bushing 38, (e.g., the same boundaries defining where first and second eccentric segments 202, 204 are disposed).
  • drive tab 248 is provided in gap 260.
  • Drive tab 248 overlaps a carrier 206 and is offset a distance radially from the guide portion defining first end 240.
  • Seat back 104 is configured to be adjusted by applying an input torque to drive plate 272 causing the drive plate to rotate in either a clockwise or counterclockwise direction.
  • biasing member 208 urges first and second eccentric segments 202, 204 in opposed directions (with first ends 212, 214 moving towards each other) to increase the length of gear mesh between outer gear 26 and inner gear 34 thereby reducing clearance or free play.
  • first eccentric segment 202 moves about first support surface 232 of carrier 206
  • second eccentric segment 204 moves about second support surface 234 of carrier 206.
  • the free play reduction position is achieved when first and second eccentric segments 202, 204 engage bearing surface 39 and lock recliner 10 into place.
  • drive plate 272 in a counterclockwise direction in turn causes drive tab 248 to rotate in the counterclockwise direction.
  • drive tab 248 subsequently engages first end 212 of first eccentric segment 202 which overcomes the ⁇ force exerted by first biasing element 209 and begins to rotate in the counterclockwise direction (i.e., a direction that distances first eccentric segment 202 from second eccentric segment 204).
  • the rotation of first eccentric segment 202 causes carrier 206 to rotate, which in turn causes second eccentric segment 204 to rotate.
  • the location of the gear mesh between outer gear 26 and inner gear 34 does not change until both first and second eccentric segments 202, 204 are rotating.
  • the location of the gear mesh may begin to change once first eccentric segment 202 begins to rotate.
  • biasing member 208 urges first and second eccentric segments 202, 204 in opposed circumferential directions (first ends 212, 214 moving towards each other) and returns first and second eccentric segments 202, 204 to the free play reduction position.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Abstract

Un dispositif d'inclinaison du siège comprend un excentrique configuré pour supporter des premier et deuxième constituants du dispositif d'inclinaison du siège de manière excentrique. L'excentrique comprend une paire de segments excentriques, ces derniers étant supportés par un élément annulaire qui est supporté rotatif par rapport aux premier et deuxième constituants du dispositif d'inclinaison du siège. Selon une forme de réalisation de l'invention, les segments excentriques tournent dans le même plan. Selon une autre forme de réalisation, les segments excentriques tournent dans des plans parallèles décalés.
PCT/US2006/005226 2005-02-16 2006-02-15 Dispositif d'inclinaison du siege WO2006088896A1 (fr)

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US60/653,430 2005-02-16

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Publication number Priority date Publication date Assignee Title
DE202007012004U1 (de) * 2007-08-29 2009-01-08 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Übertragungselement sowie Verstellbeschlag
WO2009149875A2 (fr) * 2008-06-13 2009-12-17 Brose Fahrzeugteile Gmbh & Co. Procédé de production d'une armature de réglage
WO2013060443A1 (fr) * 2011-10-25 2013-05-02 Keiper Gmbh & Co. Kg Garniture pour un siège de véhicule et siège de véhicule
JP2017007639A (ja) * 2015-06-18 2017-01-12 サンシン インダストリアル カンパニー リミテッド 車両シート用リクライナーシャフト

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US5154475A (en) * 1989-12-14 1992-10-13 Keiper Recaro Gmbh & Co. Hinge joint for the seats of motor vehicles and the like
US20020043854A1 (en) * 2000-07-11 2002-04-18 Faurecia Autositze Gmbh & Co. Kg Adjustment mechanism for an automobile seat, particularly an incline adjustment mechanism for the seat back
US20040004384A1 (en) * 2002-07-02 2004-01-08 Masahiro Iwata Seat reclining apparatus for automotive vehicle

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Publication number Priority date Publication date Assignee Title
US5154475A (en) * 1989-12-14 1992-10-13 Keiper Recaro Gmbh & Co. Hinge joint for the seats of motor vehicles and the like
US20020043854A1 (en) * 2000-07-11 2002-04-18 Faurecia Autositze Gmbh & Co. Kg Adjustment mechanism for an automobile seat, particularly an incline adjustment mechanism for the seat back
US20040004384A1 (en) * 2002-07-02 2004-01-08 Masahiro Iwata Seat reclining apparatus for automotive vehicle

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007012004U1 (de) * 2007-08-29 2009-01-08 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Übertragungselement sowie Verstellbeschlag
WO2009149875A2 (fr) * 2008-06-13 2009-12-17 Brose Fahrzeugteile Gmbh & Co. Procédé de production d'une armature de réglage
WO2009149875A3 (fr) * 2008-06-13 2010-05-06 Brose Fahrzeugteile Gmbh & Co. Procédé de production d'une armature de réglage
CN102056763A (zh) * 2008-06-13 2011-05-11 布罗斯尔汽车零件科堡两合公司 用于制造调节配件的方法
US20110154925A1 (en) * 2008-06-13 2011-06-30 Juergen Siller Method for manufacturing an adjustment fitting
US9663003B2 (en) 2008-06-13 2017-05-30 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Method for manufacturing an adjustment fitting
CN103764439A (zh) * 2011-10-25 2014-04-30 凯波有限责任两合公司 适于车辆座椅的装配件以及车辆座椅
KR20140082851A (ko) * 2011-10-25 2014-07-02 카이퍼 게엠베하 운트 코. 카게 차량 시트용 피팅 및 차량 시트
JP2014528383A (ja) * 2011-10-25 2014-10-27 ジョンソン コントロールズ コンポーネンツ ゲーエムベーハー ウントコンパニー カーゲー 車両シート用取付具及び車両シート
KR101596367B1 (ko) * 2011-10-25 2016-02-22 존슨 컨트롤즈 컴포넌츠 게엠베하 운트 코. 카게 차량 시트용 피팅 및 차량 시트
US9303685B2 (en) 2011-10-25 2016-04-05 Keiper Gmbh & Co. Kg Fitting for a vehicle seat and vehicle seat
CN103764439B (zh) * 2011-10-25 2016-08-31 凯波有限责任两合公司 适于车辆座椅的装配件以及车辆座椅
WO2013060443A1 (fr) * 2011-10-25 2013-05-02 Keiper Gmbh & Co. Kg Garniture pour un siège de véhicule et siège de véhicule
JP2017007639A (ja) * 2015-06-18 2017-01-12 サンシン インダストリアル カンパニー リミテッド 車両シート用リクライナーシャフト

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