A tilt control mechanism for an office chair includes a spring assembly therein which controls the tilt tension on the back assembly. The tilt control mechanism includes a control plate mounted to the control shaft on which the uprights are mounted, wherein the control plate rotates in combination w
A tilt control mechanism for an office chair includes a spring assembly therein which controls the tilt tension on the back assembly. The tilt control mechanism includes a control plate mounted to the control shaft on which the uprights are mounted, wherein the control plate rotates in combination with the uprights. This control plate is located within the control body and cooperates with a front stop assembly and a back stop assembly to vary the limits of forward and rearward tilting of the seat and back assemblies. Also, the tilt control mechanism includes a pneumatic actuator assembly having fixed and rotatable cam blocks. The rotatable cam block rotates relative to the fixed block such that the rotatable cam block is driven downwardly to depress the control valve of the pneumatic cylinder and thereby vary the height of the seat assembly.
대표청구항▼
What is claimed is: 1. In a chair comprising an adjustment mechanism which includes a pneumatic cylinder unit having a pneumatic cylinder and an actuator part cooperating with said cylinder, said actuator part being movable axially along an actuator axis to engage and release said cylinder and ther
What is claimed is: 1. In a chair comprising an adjustment mechanism which includes a pneumatic cylinder unit having a pneumatic cylinder and an actuator part cooperating with said cylinder, said actuator part being movable axially along an actuator axis to engage and release said cylinder and thereby engage and release said chair adjustment mechanism, said chair further including an actuator mechanism for selectively moving said actuator part along said actuator axis, said actuator mechanism comprising a fixed block stationarily mounted proximate to said actuator part and a rotatable drive block rotatably supported by said fixed block so as to be rotatable about a rotation axis and displaceable axially along said rotation axis, said drive block being operatively connected to said actuator part, said fixed block and said drive block including respective opposing cam surfaces which cooperate together such that rotation of said drive block about said rotation axis effects axial displacement of said drive block along said rotation axis into engagement with said actuator part to move said actuator part along said actuator axis. 2. The chair according to claim 1, wherein said actuator mechanism includes a drive assembly which is manually actuatable to effect rotation of said drive block about said rotation axis and displace said drive block axially toward said actuator part. 3. The chair according to claim 2, wherein said actuator axis and said rotation axis are disposed in coaxial alignment. 4. The chair according to claim 1, wherein said fixed block defines an interior guide chamber in which said drive block is rotatably received. 5. The chair according to claim 4, wherein said drive block and said fixed block are snap-fittingly engaged with each other so as to maintain said drive block and said fixed block together in a preassembled condition prior to assembly to said chair. 6. The chair according to claim 5, wherein said preassembled fixed block and drive block are mounted to a control body of said chair adjacent to said actuator part in said preassembled condition. 7. The chair according to claim 1, wherein the drive block includes a connector shaft which projects upwardly therefrom and snap fits into a corresponding connector bore formed in the fixed block. 8. An actuator mechanism for adjustable furniture having relatively movable first and second furniture components, said furniture comprising an adjustment mechanism which includes a pneumatic cylinder unit having a pneumatic cylinder connected between said first and second furniture components, and having an actuator part cooperating with said cylinder, said actuator part being depressible so as to be movable axially along an actuator axis to engage and release said cylinder and thereby engage and release said adjustment mechanism, said furniture further including an actuator mechanism for selectively depressing said actuator part, said actuator mechanism comprising: a first block mounted on said first furniture component proximate to said actuator part; and a second block rotatably supported by said first block so as to be rotatable about a rotation axis and be displaceable axially along said rotation axis, said first block and said second block including respective opposing cam surfaces which said cam surfaces are inclined relative to said rotation axis and cooperate together such that rotation of said second block effects axial displacement of said second block axially along said actuator axis into engagement with said actuator part to depress said actuator part. 9. The actuator mechanism according to claim 8, wherein said actuator mechanism includes a manual actuator assembly which is manually actuatable to effect rotation of said second block about said rotation axis and displace said second block along said rotation axis toward said actuator part. 10. The actuator mechanism according to claim 9, wherein the second block includes a connector shaft which projects upwardly therefrom and snap fits into a corresponding connector bore formed in the first block such that said first and second blocks are rotatably connected together. 11. The actuator mechanism according to claim 9, wherein said actuator axis and said rotation axis are disposed in coaxial alignment. 12. The actuator mechanism according to claim 8, wherein said first block defines an interior guide chamber in which said second block is rotatably received, said cam surfaces being disposed within said guide chamber. 13. The actuator mechanism according to claim 12, wherein said second block and said first block are snap-fittingly engaged with each other so as to maintain said second block and said first block together in a preassembled condition prior to assembly to said furniture. 14. The actuator mechanism according to claim 13, wherein said first furniture component includes a control body supported on said pneumatic cylinder unit, and wherein said preassembled first block and second block are mounted to said control body, and are disposed adjacent to said actuator part. 15. An actuator mechanism for an adjustable office chair, said chair comprising an adjustment mechanism which includes a pneumatic cylinder unit having a pneumatic cylinder and further includes an actuator part cooperating with said cylinder, said actuator part being movable along an actuator axis extending in a first direction to engage and release said cylinder and thereby engage and release said chair adjustment mechanism, said chair further including an actuator mechanism for selectively moving said actuator part along said actuator axis, said actuator mechanism comprising a fixed block stationarily mounted on a control body of said chair proximate to said actuator part, a drive block rotatably supported by said fixed block so as to be rotatable about a rotation axis extending in said first direction, and said fixed block and said drive block including respective cooperating cam surfaces which are inclined relative to said rotation axis such that rotation of said drive block about said rotation axis effects axial displacement of said drive block in said first direction along said rotation axis, said drive block being operatively connected with said actuator part such that displacement of said drive block in said first direction along said rotation axis operatively moves said actuator part in said first direction along said actuator axis toward said actuator part to depress said actuator part. 16. The actuator mechanism according to claim 15, wherein said actuator mechanism includes a drive assembly which is manually actuatable to effect rotation of said drive block about said rotation axis and axially displace said drive block, said drive assembly comprising a manual actuator handle and a drive member connected between said handle and said drive block. 17. The actuator mechanism according to claim 16, wherein said actuator axis and said rotation axis are disposed in coaxial alignment. 18. The actuator mechanism according to claim 15, wherein said fixed block defines an interior guide chamber in which said drive block is rotatably received. 19. The actuator mechanism according to claim 18, wherein said drive block and said fixed block are snap-fittingly engaged with each other so as to maintain said drive block and said fixed block together in a preassembled condition prior to assembly to said chair, said fixed block including a connector which immovably fixes said fixed block to said control body. 20. The actuator mechanism according to claim 19, wherein said preassembled fixed block and drive block are mounted to said control body of said chair adjacent to said actuator part, said rotation axis and said actuator axis being coaxially aligned substantially in alignment with each other.
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이 특허에 인용된 특허 (14)
Wilson John T. ; Nechanicky Milan, Armrest for ergonomic chair.
Bedford, Adam C.; Battey, Robert J.; Bodnar, David A.; Hadley, Jonathan B.; Hall, Jeffrey A.; Heidmann, Kurt R.; Johnson, Eric; Karsten, Gary Lee; Peterson, Gordon J., Combined tension and back stop function for seating unit.
McJames, II, William Charles, Exercise bench with enhancements that allow the obese, elderly, and physically challenged to participate in exercises performed on a conventional exercise bench.
Ludwig, James N.; Deevers, Nickolaus William Charles; Heidmann, Kurt R.; Johnson, William Thomas; Smith, Bruce M.; Spoelhof, Mark William, Seating arrangement.
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