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
  • B60N2/64—Back-rests or cushions
  • B60N2/66—Lumbar supports
  • B60N2/666—Lumbar supports vertically adjustable
• • G—PHYSICS
  • G05—CONTROLLING; REGULATING
  • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
  • G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
  • G05G1/015—Arrangements for indicating the position of a controlling member

Definitions

• Adjustment device for back supports on backrests of seats and the like is
• the invention relates to an adjusting device for back supports on backrests of seats, armchairs and the like, in particular office seats, motor vehicle seats and the like, in which a plate-like molded part which is articulated to a spring part in the direction perpendicular to the backrest plane and is adjustable in the vertical direction.
• the spring part can be adjusted by means of a threaded bolt and a handle of a handwheel or similar component and the spring part is displaceable on a longitudinal slot of a frame part.
• the handwheel is connected in a rotationally fixed manner to a threaded bushing which engages with the threaded bolt and is arranged so as to be axially displaceable relative to the threaded bolt.
• the adjustment of the back support can only be carried out directly on the adjustment device, the handwheel which has to be displaced for actuation to protrude from the rear wall of the backrest.
• the rear wall must have a longitudinal slot, so that there is a risk that the adjustment mechanism can become dirty.
• the mechanism itself is still too complex.
• the object of the invention is to provide an adjustment device of the type mentioned at the beginning, wherein the valve. by means of a threaded bolt engaging with a threaded bushing and a handle adjustable in the transverse direction to the backrest and displaceable on a longitudinal slot of a frame part, in which the handle for adjusting the molded part is attached at any point on the backrest and the rear wall of the backrest is designed to be closed can.
• the Verstellrrtechanismus is characterized according to the invention in that a Sfcellwelle lacquered with its axis parallel to the backrest plane is provided, which can be coupled via gear links directly or indirectly with the threaded bush of the threaded bolt or with a vertical rack on the frame part.
• the shaft is connected to a handwheel, a flexible actuator, e.g. a Bowden cable or the like. Can be arranged.
• the adjustment device makes it possible to use the handling part for the different types to be able to attach the actuation of the adjusting device at any point on the backrest, advantageously on the side face of the same.
• the adjustment mechanism Due to the adjusting shaft lying parallel to the backrest level, the adjustment mechanism is extremely flat. It can therefore be slightly concealed on the back of the backrest. Protruding parts are no longer present and are not visible. This prevents the risk of injury to people in the event of an accident. Furthermore, open slots or openings on the rear wall of the backrest are not required, so that the risk of contamination of the adjustment mechanism is prevented.
• the adjusting device is easy to use.
• the threaded bushing is preferably designed as a worm wheel with which a worm loosely mounted on the shaft can engage.
• the shaft itself can cdgl. locked with the screw. Through the use of worm and chord wheel a self-locking of the gear is achieved, so that the setting is locked in any position. The height can be adjusted at any time by loosening the shaft journal from the worm.
• the height adjustment of the shaped part can be brought about by the shaft having at least one gearwheel which is connected to it in a rotationally fixed manner and which cooperates with the toothed rack, the toothed wheel only interacting with the toothed rack when the shaft is axially displaced, so that when actuated and the same handwheel a change in the setting of the molded part in the direction perpendicular to the backrest plane is not possible.
• the displaceable shaft is advantageously axially under spring pressure, so that the one type of setting, namely with respect to the depth of the molded part in relation on the backrest level by means of the handwheel is always possible.
• the displaceability of the shaft can be easily od by means of an adjustable cam. the like carry out .
• the axis carrying the spring part engages behind the guide of the frame part.
• the molded part is expediently provided with a plurality of articulation points for the spring part, so that the molded part can be provided at different heights with respect to the spring part.
• the handle for rotating the shaft can also work from a ratchet artic. Device exist.
• Fig. 1 shows an embodiment of the adjusting device according to the invention in side view, partly in section and in the scheme with a pivotable backrest for a motor vehicle or the like.
• Fig. 2 shows a view in the direction of arrow II of Fig. 1 on the adjusting device with the handling parts in the diagram.
• 3 to 10 illustrate display devices in connection with the adjustment device described.
• Fig. 3 shows an embodiment of the display device on the back of the adjusting device in longitudinal section
• Fig. 4 is a section along the line IV-IV of Fig. 3rd
• FIG. 5 and 6 show in longitudinal section and in section along the line VI-VI of Fig. 5 the arrangement of the display device with direct actuation of the adjustment device by hand.
• Fig. 7 shows the arrangement of the display device at a distance from the adjusting device in section, schematically.
• the backrest 1 which can be pivoted about a transverse axis 2, has a frame 3 on the rear, on which a molded part 4 serving as a back support is arranged in height and transversely to the height direction.
• the molded part 4 is carried by a spring part 5 which is connected to the molded part 4 by means of pins 6.
• the further bores 7 serve to reposition the pin 6 for articulation of the spring part 5 at a different height of the molded part 4.
• the spring part 5 is articulated on an axis 8 which engages behind the guide of the frame part 3.
• Guide strips or wires for limiting the deflection of the molded part 4 as a support plate can be arranged on the front of the molded part 4.
• a threaded sleeve 13 in which a threaded bolt 14 is arranged with a threaded part 15.
• the threaded bolt 14 engages at the outer end with the spring part 5 in such a way that when the threaded bolt 14 is axially adjusted by means of the threaded bush 13, the spring part 5 is kept more or less pivoted out.
• the disc 11 is connected to one or more leaf springs 16 which rest on the frame part 3 and cooperate with locking points arranged distributed thereon.
• a worm wheel 17 is connected in a rotationally fixed manner to the threaded bushing 13 and engages with a worm 18 which is loosely mounted on a shaft 19.
• the shaft 19 is provided with radially extending pins 20 which can engage in open grooves or slots 21 of the screw part 18.
• the screw 18 is mounted with its shaft 18a in a fixed position in a bearing 22.
• gears 23 are rotatably connected, e.g. by means of the pins 24, the gears 23 being intended to be engaged with the stationary racks 25.
• the shaft 19 is in the axial direction under the action of a suspension 26, by means of which the toothed wheels 23 are kept out of engagement with the toothed racks 25 and the pins 20 engage in the grooves 21 of the screw part 18.
• a handwheel 28 which can be provided, for example, on a side part 29 of the frame part 3, is used to rotate the shaft 19 via a flexible transmission element 30, for example via a flexible shaft or a Bowden cable wire or the like, the flexible transmission member 30 being surrounded by a sheath 31.
• the threaded bolt 14 is moved in the axial direction and thus the molded part 4 is pivoted more or less as a support plate for supporting the spine of the person on the seat.
• the shaft 19 is displaced to the left via the flexible transmission element 30 - seen in the plane of the drawing sheet of FIG. 2.
• the gears 23 engage with the racks 25.
• the pins 20 or the like emerge from the grooves 21. out.
• the entire adjusting device 13 to 18 for the spring part 5 and the support plate 4 is moved or lowered along the slot 12 in the height direction.
• the swivel position of the spring part 5 is not changed here.
• the handwheel 28 is pushed in again, so that the shaft 19 is pivoted to the right under the action of the spring 26 - as seen in the plane of the drawing.
• the pin 20 can jump back into the associated groove 21, so that turning the handwheel 28 now causes the spring part 5 to be adjusted with the molded part 4.
• the shaft 19 is guided in an elongated slot 32.
• the displacement of the shaft 19 in the axial direction can also be carried out mechanically.
• an lever 33 may be provided, which is connected to an eccentrically designed sleeve 34, which in turn is firmly connected to a cam part 35.
• the cam part has a ramp-shaped surface 36, by means of which, when the setting lever 33 is rotated about the axis of the transmission element 30, the handwheel 28 can be displaced outward so far that when the shaft 19 is displaced, the gearwheels 23 also dex rack 25 come together.
• the setting lever 33 is turned back, the shaft 19 is simultaneously displaced under the action of the spring 26 in the opposite direction. 37 with a coupling part and 38 with a bearing block.
• the set position of the back of the support mold part For handling the adjustment device or for checking the position of the part 4 forming the back support, it is of particular importance to know the set position of the back of the support mold part. For the individual adjustment of the adjustment device and also in the event that different positions of the back support molded part have to be changed on the same seat, for example when the motor vehicle is driven by different drivers, it is important that the position set in each case by a scale can be detected to learn what setting the back support molding has and to be able to restore the usual position of the molding with interim adjustment. Because the positions of the molded part depend on the back training of the person concerned, for example whether it is a hollow back (lordosis) or a round back (kyphosis).
• a display device 40 which can be directly or indirectly ceko ⁇ eit with the threaded bushing 13.
• the display device 40 has a scale plate 41 and a pointer 42.
• the scale plate 41 is advantageously non-rotatably connected, for example by means of a double edge 43 or polygon, to the rotatable threaded bushing 13, while the bolt 4 arranged fixed in the threaded bushing 13 has a pointer 42, the scale plate 41 being able to obtain a scale division on the surface 41a.
• the pointer 42 is rotatably connected to the fixed threaded bolt 14. This can be done in such a way that the pointer 42 is kept out of round in cross section
• Shank 42a is inserted into a corresponding recess 14a of the threaded bolt 14, while at the same time an axial displacement of the pointer 42 is ensured. Because in that the threaded bolt 14 is secured against rotation by the engagement of the spring part 5 in the fork part 14b, the threaded bolt 14 is displaced more or less in the axial direction when the threaded bushing 13 is rotated, as a result of which the back support molded part 4 assumes a more or less large deflection. It is also possible to attach the scale plate 41 to the non-rotatably arranged threaded bolt 14 and to connect the pointer 42 to the rotatable threaded bush 13. When the scale plate 41 is rotated on the scale, the pointer 42 shows the degree of adjustment of the molded back support part 4.
• 5 and 6 illustrate a modified embodiment in that the scale plate 41 engages with the threaded bushing 13 by means of brackets 44 with serrations 45, so that the threaded bushing 13 can be twisted for manual adjustment by means of the scale plate 41, the remote adjustment being effected by the Wave 19 can be omitted.
• Leaf spring 16 can bear against the frame part 3 by its own pretension in such a way that the respective height adjustment of the disc 11 is held only by friction.
• the leaf spring 16 is advantageously mounted in an annular groove 11a of the disk 11 and can be brought into this annular groove by a bayonet lock.
• the display device 41, 42 is arranged at the free end of the shaft 19, wherein the display device can be arranged away from the adjustment device by means of a flexible shaft 47, e.g. or the like on the dashboard of a motor vehicle.
• the scale plate 41 is connected in a rotationally fixed manner to a holder 48, which can be screwed onto the frame 3, while the pointer 42 is connected to the rotatable shaft 19 by means of a coupling engagement 49.
• the pointer 50 is designed as a fork, a slide 52 serving as a display device being provided in the longitudinal slot 51 formed by the fork.
• This slide 52 engages with a spiral guide part 53 of a scale plate 54.
• a pin 52a engages in the guide part 53 as a spiral groove.
• the slide slides up and down as a display part in the radial direction, so that the respective radial position of the slide 52 supports the molded part 4 shows moderately.
• an epiral rib can also be provided, which is encompassed by a pin part of the slide 52 designed as a fork.

Landscapes

• Engineering & Computer Science (AREA)
• Aviation & Aerospace Engineering (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Automation & Control Theory (AREA)
• Chairs For Special Purposes, Such As Reclining Chairs (AREA)
• Chair Legs, Seat Parts, And Backrests (AREA)
• Seats For Vehicles (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=25783382

Family Applications (1)

Country Status (9)

Cited By (2)

Families Citing this family (53)

Citations (2)

Family Cites Families (8)

• 1981
  • 1981-01-22 US US06/306,911 patent/US4465317A/en not_active Expired - Fee Related
  • 1981-01-22 JP JP56500598A patent/JPH0140605B2/ja not_active Expired
  • 1981-01-22 WO PCT/EP1981/000006 patent/WO1981002093A1/de unknown
  • 1981-01-23 NL NL8100319A patent/NL8100319A/nl not_active Application Discontinuation
  • 1981-01-26 SE SE8100457A patent/SE446500B/sv not_active IP Right Cessation
  • 1981-01-26 FR FR8101390A patent/FR2474291A1/fr active Granted
  • 1981-01-26 GB GB8102280A patent/GB2068718B/en not_active Expired
  • 1981-01-26 AT AT0031881A patent/AT380387B/de not_active IP Right Cessation
  • 1981-01-26 IT IT19320/81A patent/IT1135173B/it active

Patent Citations (2)

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