GB2362818A - Variable contour back cushion assembly - Google Patents
Variable contour back cushion assembly Download PDFInfo
- Publication number
- GB2362818A GB2362818A GB0013188A GB0013188A GB2362818A GB 2362818 A GB2362818 A GB 2362818A GB 0013188 A GB0013188 A GB 0013188A GB 0013188 A GB0013188 A GB 0013188A GB 2362818 A GB2362818 A GB 2362818A
- Authority
- GB
- United Kingdom
- Prior art keywords
- guide line
- cushion
- guide
- secured
- resting
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 230000000284 resting effect Effects 0.000 claims description 65
- 238000005452 bending Methods 0.000 claims description 17
- 230000000694 effects Effects 0.000 claims description 4
- 102100034742 Rotatin Human genes 0.000 description 1
- 101710200213 Rotatin Proteins 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
Classifications
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- 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
- B60N2/64—Back-rests or cushions
- B60N2/66—Lumbar supports
- B60N2/667—Lumbar supports having flexible support member bowed by applied forces
- B60N2/6671—Lumbar supports having flexible support member bowed by applied forces with cable actuators
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/40—Support for the head or the back for the back
- A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
- A47C7/462—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means
- A47C7/465—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means by pulling an elastic cable
-
- 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
- B60N2/0224—Non-manual adjustments, e.g. with electrical operation
- B60N2/02246—Electric motors therefor
-
- 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
- B60N2/0224—Non-manual adjustments, e.g. with electrical operation
- B60N2/0226—User interfaces specially adapted for seat adjustment
- B60N2/0228—Hand-activated mechanical switches
-
- 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
- B60N2/64—Back-rests or cushions
- B60N2/66—Lumbar supports
- B60N2/666—Lumbar supports vertically adjustable
-
- 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
- B60N2/64—Back-rests or cushions
- B60N2/66—Lumbar supports
- B60N2/667—Lumbar supports having flexible support member bowed by applied forces
- B60N2/6673—Lumbar supports having flexible support member bowed by applied forces with motor driven adjustments
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Human Computer Interaction (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
A back cushion assembly includes a curved, flexible cushion 1 mounted on guide tracks 2, for vertical adjustment thereon. A first guide line 4 is attached to the upper end of the cushion and is used for pulling the upper end of the cushion towards the lower, in order to increase the curvature of the cushion. A second guide line 5 and a third guide line 6 move the cushion along the guide tracks. Two control configurations are disclosed. In the first, guide line 4 is operated by a control device (7) and guide line 5 is operated by a second similar control means. Guide line 6 is attached to the seat frame via a spring (8). Pulling on guide line 5 moves the cushion vertically upwards along the guide tracks. When guide line 5 is relaxed, spring (8) causes the cushion to descend. In the second, the two control devices 7 are replaced by a single unit 73. Guide lines 5 and 6 become a continuous loop, the movement of which (and thus the position of the cushion is controlled by a threaded shaft (71) fitted with a gear wheel. Guide line 4 is controlled by a second shaft and gear assembly. Shaft (70) is fitted with gear (762) and is axially moveable in order to selectively engage with either of the gears fitted to the threaded shafts. Rotation of shaft (70) is effected by hand or by a suitable motor system controlled by switch (701).
Description
2362818 BACK CUSHION ASSEXMLY The present invention relates to a back
cushion assembly for a chair.
A conventional back cushion for a chair in accordance with the prior art is placed on the backrest of a chair for providing a support and cushion effect to a user. However, the back cushion has a fixed curvature so that it cannot achieve an ergonomic function to fit the curvature of the user's back of different statures!, thereby greatly limiting the versatility of the back cushion. In addition, the back cushion cannot be moved on the backrest of the chair so that the back cushion cannot fit different requirements of the users.
In accordance with one aspect of the present invention, there is provided a back cushion assembly comprising: a slightly curved elastic resting cushion having two sides each having an upper end and a lower end; two guide tracks each extending through the upper end and the lower end of one of the two sides of the resting cushion so that the resting cushion is slidably mounted on the two guide tracks; a first guide line having a first end secured to an upper end of the resting cushion; an adjusting device secured to a second end of the first guide fine for adjusting the length of the first guide line which pulls the upper end of the resting cushion downward for bending the resting cushion along the two guide tracks; a second guide line having a first end secured to the resting cushion for moving the resting cushion upward; and a third guide line having a first end secured to the resting cushion and located under the first end of the second guide line for moving the resting cushion downward.
1 Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
In the drawings:
Fig. 1 is a perspective view of a back cushion assembly in accordance with the present invention; Fig. 2 is an exploded view of an adjusting device of the back cushion assembly as shown in Fig. 1; Fig. 3 is a top plan view of an adjusting member of the adjusting device as shown in Fig. 2; Fig. 4 is a side plan operational view of the back cushion assembly as shown in Fig. 1; Fig. 5 is a side plan operational view of the back cushion assembly as shown in Fig. 1; Fig. 6 is a front plan view of the back cushion assembly as shown in Fig. 1; Fig. 7 is an exploded view of an adjusting device of the back cushion assembly in accordance with another embodiment of the present invention; Fig. 8 is a top plan view of the adjusting device as shown in Fig. 7; and Fig. 7.
Fig. 9 is a front plan view of the back cushion assembly as shown in Referring to the drawings and initially to Figs. 1-6, a back cushion assembly in accordance with the present invention comprises a slightly curved 2 elastic resting cushion 1 having two sides each having an upper end and a lower end, two guide tracks 2 each extending through the upper end and the lower end of one of the two sides of the resting cushion 1 so that the resting cushion I is slidably mounted on a chair backrest 3 along the two guide tracks 2, a first guide line 4 having a first end secured to an upper end of the resting cushion 1, an adjusting device 7 secured to a second end of the first guide line 4 for adjusting the length of the first guide line 4 which pulls the upper end of the resting cushion 1 downward for bending the resting cushion 1 along the two guide tracks 2 as shown in Fig. 4, a second guide line 5 having a first end secured to the resting cushion 1 for moving the resting cushion 1 upward, and a third guide line 6 having a first end secured to the resting cushion 1 and located under the first end of the second guide line 5 for moving the resting cushion 1 downward. Accordingly, the resting cushion 1 is moved upward and downward along the guide tracks 2 by the second guide line 5 and the third guide line 6 as shown in Figs. 5 and 6, thereby arbitrarily adjusting the position of the resting cushion 1 relative to the chair backrest 3.
Each of the two sides of the resting cushion 1 has a through hole 11 defined in the upper end and lower end thereof for passage of the guide track 2. A first lug hole 13 is mounted on the upper end of the resting cushion 1. An extension plate 12 is mounted on the lower end of the resting cushion 1 and is provided with a guide line tube positioning portion 16, and a second lug hole 14 and a third lug hole 15 opposite to each other.
Each of the two guide tracks 2 has two ends each provided with a washer 21 for securing the guide track 2 to the chair backrest 3.
3 As shown in Figs. 2 and 3, the adjusting device 7 includes a housing 73, a guide line locking nut 72 movably mounted in the housing 73 and defining a lug hole 79 for securing the second end of the first guide line 4, a threaded rod 71 engaged with the guide line locking nut 72 for moving it, an U-shaped pin 78 extending through the housing 73 for clamping an outer periphery of the threaded rod 71 therein, an adjusting member 76 secured on the threaded rod 71 for rotating it and having a plurality of sector teeth 77 mounted therein, an elastic piece 74 protruding from one side of the housing 73 for receiving a swing locking pawl 75 which is engaged with the sector teeth 77 of the adjusting member 76 for creating a sound effect when the adjusting member 76 is rotated.
As shown in Fig. 6, two adjusting devices 7 are each respectively connected to the first guide line 4 and the second guide line 5. The first guide line 4 has a guide line tube 41 secured to the guide line tube positioning portion 16 and having a guide line lug secured to the first lug hole 13. The second guide line 5 has a guide line lug secured to the second lug hole 14. The third guide line 6 has a guide line lug secured to the third lug hole 15 and has a second end secured to a first end of a spring 8 whose second end is secured to the chair backrest 3.
In such a manner, the first guide line 4 is adjusted by a first adjusting device 7 for bending the resting cushion 1 so as to adjust the bending curvature of the resting cushion 1 so as to fit the requirements of the user. The second guide line 5 is adjusted by a second adjusting device 7 for moving the resting cushion 1 upward, and the third guide line 6 is pulled by the spring 8 for 4 moving the resting cushion 1 downward so as to ad ust the position of the resting cushion 1 relative to the chair backrest 3 as shown in Figs. 5 and 6.
The second guide line 5 has a bending portion provided with a roller 22 and has a guide line tube 51 secured to an adjusting base 23 which is used for finely adjusting the outward exposing length of the second guide line 5, and the third guide line 6 has a bending portion provided with a roller 22 and has a guide line tube 61 secured to an adjusting base 23 which is used for finely adjusting the outward exposing length of the third guide line 6.
Referring to Figs. 7-9 with reference to Figs. 1-6, the spring 8 easily incurs a fatigue problem during long term utilization. Therefore, in accordance with another embodiment of the present invention, the spring 8 is removed.
The guide line locking nut 72 of the adjusting device 7 defines two opposite lug holes 79. The second guide line 5 has a first end secured to the second lug hole 14 of the extension plate 12 of the resting cushion 1 and a second end secured to one lug hole 79 of the guide line locking nut 72. The third guide line 6 has a first end secured to the third lug hole 15 of the extension plate 12 of the resting cushion 1 and a second end secured to the other lug hole 79 of the guide line locking nut 72. Accordingly, the resting cushion 1 is moved upward and downward along the guide tracks 2 by the second guide line 5 and the third guide line 6 which are operated by the adjusting device 7, thereby arbitrarily adjusting the position of the resting cushion I relative to the chair backrest 3.
The adjusting device 7 includes ahousing 73, an adjusting member 76 rotatably mounted on the housing 73 and having a linking rod 761 axially slidably received in the housing 73, a drive gear 762 secured on the linking rod 761 to rotate therewith, two threaded rods 71 each rotatably mounted in the housing 73 and each having a driven gear 711 meshing with the drive gear 762, and two guide line locking nuts 72 each engaged with and driven by the threaded rod 71 to move in the housing 73. One of the two guide line locking nuts 72 defines a lug hole 79 for securing the second end of the first guide line 4, and the other of the two guide line locking nuts 72 defines two opposite lug holes 79 each securing the second end of the second guide line 5 and the third guide line 6.
By such an arrangement, the adjusting member 76 can be axially moved in the housing 73 to mesh with and rotate the driven gear 711 of one of the two threaded rods 71 for moving one of the two guide line locking nuts 72 in the housing 73 so as to move the first guide line 4 or the second guide line 5 together with the third line 6, thereby adjusting the bending curvature or the position of the resting cushion 1.
The linking rod 761 of the adjusting member 76 defines a plurality of annular grooves 763, and the housing 73 is provided with a pressing ball 731 detachably received in one of the annular grooves 763 for preventing the adjusting member 76 arbitrarily axially moving in the housing 73.
The housing 73 is provided with a plurality of rollers 732 mounted on a bending portion of the first guide line 4, the second guide line 5 and the guide line 6, thereby decreasing the friction between the guide lines and the housing 73.
6 The linking rod 761 of the adjusting member 76 includes one distal end provided with a motor 70 which is controlled by a circuit board and a switch 701 for rotatin g the linking rod 761. The linking rod 761 and the two guide line locking nuts 72 are provided with a sensor 721. The housing 73 is provided with a plurality of sensing pieces 722 located adjacent to upper and lower dead points of the two guide line locking nuts 72 and connected to the circuit board.
When the switch 701 is pressed, the motor 70 is operated to rotate the linking rod 761, thereby rotating the drive gear 76 so that the adjusting device 7 is operated by the power supply. Alternatively, when the switch 701 is not pressed, the motor 70 is not operated so that the adjusting device 7 can be operated manually.
It should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
7
Claims (1)
- CLAIMS:1. A back cushion assembly comprising: a slightly curved elastic resting cushion (1) having two sides each having an upper end and a lower end; two guide tracks (2) each extending through said upper end and said lower end of one of said two sides of said resting cushion (1) so that said resting cushion (1) is slidably mounted on said two guide tracks (2); a first guide line (4) having a first end secured to an upper end of said resting cushion (1); an adjusting device (7) secured to a second end of said first guide line (4) for adjusting the length of said first guide line (4) which pulls said upper end of said resting cushion (1) downward for bending said resting cushion (1) along said two guide tracks (2); a second guide line (5) having a first end secured to said resting cushion (1) for moving said resting cushion (1) upward; and a third guide line (6) having a first end secured to said resting cushion (1) and located under said first end of said second guide line (5) for moving said resting cushion (1) downward.2. The back cushion assembly in accordance with claim 1, wherein, each of said two sides of said resting cushion (1) has a through hole (11) defined in the upper end and lower end thereof for passage of said guide track (2), a first lug hole (13) mounted on the upper end of said resting cushion (1), an extension plate (12) mounted on the lower end of said resting cushion (1), said extension plate (12) provided with a guide line tube positioning 8 portion (16), and a second lug hole (14) and a third lug hole (15) opposite to each other, each of said two guide tracks (2) having two ends each provided with a washer (21) for securing said guide track (2) to a chair backrest (3), said adjusting device (7) including a housing (73), a guide line locking nut (72) movably mounted in said housing (73), a threaded rod (71) engaged with said guide line locking nut (72) for moving it, an U-shaped pin (78) extending through said housing (73) for clamping an outer periphery of said threaded rod (71) therein, an adjusting member (76) secured on said threaded rod (71) for rotating it and having a plurality of sector teeth (77) mounted therein, an elastic piece (74) protruding from one side of said housing (73) for receiving a swing locking pawl (75) which is engaged with said sector teeth (77) of said adjusting member (76) for creating a sound effect when said adjusting member (76) is rotated, whereby, two adjusting devices (7) are each connected to said first guide line (4) and said second guide line (5), said first guide line (4) having a guide line tube (41) secured to said guide line tube positioning portion (16) and having a guide line lug secured to said first lug hole (13), said second guide line (5) having a guide line lug secured to said second lug hole (14), said third guide line (6) having a guide line lug secured to said third lug hole (15) and having a second end secured to a first end of a spring (8) whose second end is secured to said chair backrest (3), and whereby, said first guide line (4) is adjusted by a first adjusting device (7) for bending said resting cushion (1) so as to adjust the bending 9 curvature of said resting cushion (1), said second guide line (5) is adjusted by a second adjusting device (7) for moving said resting cushion (1) upward, and. said third guide line (6) is pulled by said spring (8) for moving said resting cushion (1) downward so as to adjust the position of said resting cushion (1) relative to said chair backrest (3).3. The back cushion assembly in accordance with claim 2, wherein said second guide line (5) has a bending portion provided with a roller (22) and has a guide line tube (51) secured to an adjusting base (23) which is used for finely adjusting the outward exposing length of said second guide line (5), and said third guide line (6) has a bending portion provided with a roller (22) and has a guide line tube (61) secured to an adjusting base (23) which is used for finely adjusting the outward exposing length of said third guide line (6).4. The back cushion assembly in accordance with claim 2, wherein said guide line locking nut (72) of said adjusting device (7) defines two opposite lug holes (79), said second guide line (5) having a first end secured to said second lug hole (14) of said extension plate (12) of said resting cushion (1) and a second end secured to one lug hole (79) of said guide line locking nut (72), and said third guide line (6) having a first end secured to said third lug hole (15) of said extension plate (12) of said resting cushion (1) and a second end secured to the other lug hole (79) of said guide line locking nut (72).5. A back cushion assembly comprising:a slightly curved elastic resting cushion (1) having two sides each having an upper end and a lower end; two guide tracks (2) each extending through said upper end and said lower end of one of said two sides of said resting cushion (1) so that said resting cushion (1) is slidably mounted on said two guide tracks (2); a first guide line (4) having a first end secured to an upper end of said resting cushion (1); an adjusting device (7) secured to a second end of said first guide line (4) for adjusting the length of said first guide line (4) which pulls said upper end of said resting cushion (1) downward for bending said resting cushion (1) along said two guide tracks (2); a second guide line (5) having a first end secured to said resting cushion (1) for moving said resting cushion (1) upward; a third guide line (6) having a first end secured to said resting cushion (1) and located under said first end of said second guide line (5) for moving said resting cushion (1) downward; wherein, said adjusting device (7) includes a housing (73),. an adjusting member (76) rotatably mounted on said housing (73) and having a linking rod (761) axially slidably received in said housing (73), a drive gear (762) secured on said linking rod (761) to rotate therewith, two threaded rods (71) each rotatably mounted in said housing (73) and each having a driven gear (711) meshing with said drive gear (762), two guide line locking nuts (72) each engaged with and driven by said threaded rod (71) to move in said housing (73), one of said two guide line locking nuts (72) defining a lug hole (79) for securing the second end of said first guide line (4), and the other of said two 11 guide line locking nuts (72) defining two opposite lug holes (79) each securing a second end of said second guide line (5) and said third guide line (6).6. The back cushion assembly in accordance with claim 5, wherein said linking rod (761) of said adjusting member (76) includes one distal. end provided with a motor (70) which is controlled by a circuit board and a switch 701 for rotating said linking rod (761), said linking rod (761) and said two guide line locking nuts (72) are provided with a sensor (721), and said housing (73) is provided with a plurality of sensing pieces (722) located adjacent to dead points of said two guide line locking nuts (72) and connected to said circuit board.7. The back cushion assembly in accordance with claim 5, wherein said linking rod (761) of said adjusting member (76) defines a plurality of annular grooves (763), and said housing (73) is provided with a pressing ball (731) detachably received in one of said annular grooves (763).8. The back cushion assembly in accordance with claim 5-, wherein said housing (73) is provided with a plurality of rollers (732) mounted on a bending portion of said first guide line (4), said second guide line (5) and said guide line (6).9. A back cushion assembly substantially as hereinbefore described with reference to and as shown in Figures 1 to 6 of the accompanying drawings.10. A back cushion assembly which includes an adjusting device substantially as hereinbefore described with reference to and as shown in Figures 7 to 9 of the accompanying drawings.12 ..A 13 Claims:- Amendments to the claims have been filed as follows 1. A back cushion assembly comprising:a slightly curved elastic support cushion (1) having two sides, an upper end and a lower end, two guide tracks (2) extending through the upper and lower ends of the support cushion (1) and disposed one on each side of the support cushion (1) so that the support cushion (1) is slidably mounted on the two guide tracks (2), a first line (4) having a first end secured to the upper end of the support cushion (1) and a second end secured to an adjusting device (7) for adjusting the length of the first guide line (4) so as to pull the upper end of the support cushion (1) downwardly so as to bend the support cushion (1) relative to the two guide tracks (2), a second guide line (5) having a first end secured to the support cushion (1) for moving the support cushion (1) upwardly relative to the two guide tracks (2), and a third guide line (6) having a first end secured to the support cushion (1) for moving the support cushion (1) downwardly relative to the two guide tracks (2), the first end of the third guide line (6) being located beneath the first end of the second guide line (5).2. A back cushion assembly as claimed in Claim 1, in which the first end of the first guide line (4) is secured to a bracket (13) mounted on the upper end of the support cushion (1) and an elongated plate (12) is mounted on the lower end of the support cushion (1), the elongated plate (12) including a portion (16) to which a guide line tube (41) is secured.1 ú 3. A back cushion assembly as claimed in Claim 2, in which the adjusting device (7) includes a housing (73), a guide line locking nut (72) movable within the housing (73), a threaded rod (71) engaged with the guide line locking nut (72) for effecting movement thereof, a U-shaped pin (78) extending through the housing (73) and engaging the threaded rod (71) for holding it in the housing (73) and an adjusting member (76) secured to the threaded rod (71) for rotation of the threaded rod (71) relative to the housing (73).4. A back cushion assembly as claimed in Claim 4, in which the adjusting member (76) has internal teeth (77) and a pawl (75) is spring-loaded into engagement with the teeth (77) for creating a sound effect when the adjusting member (76) is rotated.5. A back cushion assembly as claimed in Claim 2, which includes a second adjusting device (7) for adjustment of the second guide line (5) for moving the support cushion (1) upwardly.6. A back cushion assembly as claimed in Claim 5, in which the third guide line (6) has a second end to which a spring (8) is attached for pulling the third guide line (6) for moving the support cushion (1) downwardly.7. A back cushion assembly as claimed in any one of the preceding claims, in which each of the second and third guide lines (5 and 6) includes a bending portion engaged by a roller (22) and has a guide line tube (51) secured to an adjusting base (23) which is used for fine adjustment of the exposed length of the respective guide line (5, 6).8. A back cushion assembly as claimed in Claim 2, in which the elongated plate (12) includes two brackets (14, 15) and the guide line locking nut (72) of the adjusting device (7) includes two opposite slots (79), the second guide line (5) having its first end secured to one of the brackets (14) and its second end secured to one slot (79) of the guide line locking nut (72).9. A back cushion assembly as claimed in Claim 8, in which the first end of the third guide line (6) is secured to the other bracket (15) of the elongated plate (12) and the second end of the third guide line (6) is secured to the other slot (79) of the guide line locking nut (72).10. A back cushion assembly as claimed in Claim 1, in which the adjusting device (7) includes a housing (73) and an adjusting member (76) rotatably mounted on the housing (73), the adjusting member (76) including a linking rod (761) which is slidable axially within the housing (73) and a drive gear (762) mounted on the linking rod (761) so as to rotate therewith.11. A back cushion assembly as claimed in Claim 10, in which two threaded rods (71) are rotatably mounted in the housing (73), the threaded rods (71) carrying driven gears (711) which are selectively engageable with the drive gear (762).lb 12. A back cushion assembly as claimed in Claim 11, in which a guide line locking nut (72) is engaged with and driven by each of the threaded rods (71) for movement thereof within the housing (73), one of the guide line locking nuts (72) having a slot (79) for attachment of the second end of the first guide line (4) and the other guide line locking nut (72) having two opposite slots (79) for attachment of the second ends of the second and third guide lines (5 and 6).13. A back cushion assembly as claimed in Claim 12, in which the linking rod (761) of the adjusting member (76) has a distal end connected to a motor (70) which is controlled by a circuit board and a switch (701) for rotating the linking rod (761).14. A back cushion assembly as claimed in Claim 13, in which each of the guide line locking nut s (72) is provided with a sensor (721) and the housing (73) is provided with sensing pieces (722) connected to the circuit board and arranged for engagement with the sensors (721).15. A back cushion assembly as claimed in any one of Claims 10 to 14, in which the linking rod (761) of the adjusting member (76) is formed with a plurality of annular grooves (763) and the housing (73) is provided with a spring-loaded ball (731) received selectively in one of the annular grooves (763)..17 16. A back cushion assembly as claimed in any one of claims 10 to 15, in which the housing (73) is provided with a plurality of rollers (732) which engage bending portions of the first, second and third guide lines (4, 5 and 6).17. A back cushion assembly substantially as hereinbefore described with reference to and as shown in Figures 1 to 6 of the accompanying drawings.18. A back cushion assembly substantially as hereinbefore described with reference to and as shown in Figures 7 to 9 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0013188A GB2362818B (en) | 2000-06-01 | 2000-06-01 | Back cushion assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0013188A GB2362818B (en) | 2000-06-01 | 2000-06-01 | Back cushion assembly |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0013188D0 GB0013188D0 (en) | 2000-07-19 |
| GB2362818A true GB2362818A (en) | 2001-12-05 |
| GB2362818B GB2362818B (en) | 2002-09-11 |
Family
ID=9892685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0013188A Expired - Lifetime GB2362818B (en) | 2000-06-01 | 2000-06-01 | Back cushion assembly |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2362818B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1407927A2 (en) * | 2002-10-08 | 2004-04-14 | Fico Cables, Lda | Actuating mechanism for a spine support |
| EP1327400A3 (en) * | 2002-01-11 | 2004-04-28 | Himolla Polstermöbel GmbH | Furniture for sitting and/or lying on |
| WO2006029204A1 (en) * | 2004-09-07 | 2006-03-16 | L & P Property Management Company | Mechanism for thin seat lumbar |
| CN102092325A (en) * | 2009-11-16 | 2011-06-15 | L&P瑞士持有股份有限公司 | Adjusting device for a lumbar support and method of adjusting a lumbar support |
| US20180036186A1 (en) * | 2014-04-09 | 2018-02-08 | The Comfort Companies, Inc. | Adjustable backrest |
| US10595639B2 (en) | 2015-10-21 | 2020-03-24 | The Comfort Companies, Llc | Adjustable chair support system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5217278A (en) * | 1991-03-13 | 1993-06-08 | Findlay Industries, Inc. | Mechanism for providing adjustable lumbar support in a seat |
| US5567011A (en) * | 1990-03-09 | 1996-10-22 | Sessini; Lorenza | Cushion for anatomical support, especially for the lumbar and cervical regions, to fit onto seat backs |
| US5651584A (en) * | 1995-04-24 | 1997-07-29 | L & P Property Management Company | Lumbar support structure for automotive vehicle |
| US5791733A (en) * | 1996-02-09 | 1998-08-11 | Knoll, Inc. | Adjustable lumbar support |
| WO1998045137A1 (en) * | 1997-04-10 | 1998-10-15 | Megaplast S.A. | Back support for seat-backs, in particular for motor vehicle seats |
| US6030041A (en) * | 1999-03-02 | 2000-02-29 | Hsiao; Jin-Long | Back pad adjusting structure |
-
2000
- 2000-06-01 GB GB0013188A patent/GB2362818B/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5567011A (en) * | 1990-03-09 | 1996-10-22 | Sessini; Lorenza | Cushion for anatomical support, especially for the lumbar and cervical regions, to fit onto seat backs |
| US5217278A (en) * | 1991-03-13 | 1993-06-08 | Findlay Industries, Inc. | Mechanism for providing adjustable lumbar support in a seat |
| US5651584A (en) * | 1995-04-24 | 1997-07-29 | L & P Property Management Company | Lumbar support structure for automotive vehicle |
| US5791733A (en) * | 1996-02-09 | 1998-08-11 | Knoll, Inc. | Adjustable lumbar support |
| WO1998045137A1 (en) * | 1997-04-10 | 1998-10-15 | Megaplast S.A. | Back support for seat-backs, in particular for motor vehicle seats |
| US6030041A (en) * | 1999-03-02 | 2000-02-29 | Hsiao; Jin-Long | Back pad adjusting structure |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1327400A3 (en) * | 2002-01-11 | 2004-04-28 | Himolla Polstermöbel GmbH | Furniture for sitting and/or lying on |
| EP1407927A2 (en) * | 2002-10-08 | 2004-04-14 | Fico Cables, Lda | Actuating mechanism for a spine support |
| EP1407927A3 (en) * | 2002-10-08 | 2008-01-23 | Fico Cables, Lda | Actuating mechanism for a spine support |
| WO2006029204A1 (en) * | 2004-09-07 | 2006-03-16 | L & P Property Management Company | Mechanism for thin seat lumbar |
| US7549700B2 (en) | 2004-09-07 | 2009-06-23 | Schukra Of North America | Mechanism for thin seat lumbar |
| CN102092325A (en) * | 2009-11-16 | 2011-06-15 | L&P瑞士持有股份有限公司 | Adjusting device for a lumbar support and method of adjusting a lumbar support |
| CN102092325B (en) * | 2009-11-16 | 2013-04-17 | Schukra奥地利股份有限公司 | Adjusting device for a lumbar support and method of adjusting a lumbar support |
| US20180036186A1 (en) * | 2014-04-09 | 2018-02-08 | The Comfort Companies, Inc. | Adjustable backrest |
| US10492966B2 (en) * | 2014-04-09 | 2019-12-03 | The Comfort Companies, Llc | Adjustable backrest |
| US10595639B2 (en) | 2015-10-21 | 2020-03-24 | The Comfort Companies, Llc | Adjustable chair support system |
| US11147381B2 (en) | 2015-10-21 | 2021-10-19 | The Comfort Companies, Llc | Adjustable chair support system |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2362818B (en) | 2002-09-11 |
| GB0013188D0 (en) | 2000-07-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PE20 | Patent expired after termination of 20 years |
Expiry date: 20200531 |