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
  • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
  • B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
  • B60N2/18—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable the front or the rear portion of the seat being adjustable, e.g. independently of each other
  • B60N2/1807—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable the front or the rear portion of the seat being adjustable, e.g. independently of each other characterised by the cinematic
  • B60N2/181—Rods
• • 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
  • A47C7/02—Seat parts
  • A47C7/14—Seat parts of adjustable shape; elastically mounted ; adaptable to a user contour or ergonomic seating positions
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C9/00—Stools for specified purposes
  • A47C9/002—Stools for specified purposes with exercising means or having special therapeutic or ergonomic effects
• • 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
  • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
  • B60N2/10—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable tiltable
• • 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
  • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
  • B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
  • B60N2/18—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable the front or the rear portion of the seat being adjustable, e.g. independently of each other
  • B60N2/185—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable the front or the rear portion of the seat being adjustable, e.g. independently of each other characterised by the drive mechanism
  • B60N2/1853—Linear actuator, e.g. screw mechanism
• • 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
  • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
  • B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
  • B60N2/18—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable the front or the rear portion of the seat being adjustable, e.g. independently of each other
  • B60N2/185—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable the front or the rear portion of the seat being adjustable, e.g. independently of each other characterised by the drive mechanism
  • B60N2/1878—Hydraulic or pneumatic actuation
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
  • B60R16/08—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for fluid
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
  • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
  • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
  • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
  • F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
  • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
  • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
  • F15B15/08—Characterised by the construction of the motor unit
  • F15B15/10—Characterised by the construction of the motor unit the motor being of diaphragm type
  • F15B15/103—Characterised by the construction of the motor unit the motor being of diaphragm type using inflatable bodies that contract when fluid pressure is applied, e.g. pneumatic artificial muscles or McKibben-type actuators

Definitions

• the invention relates to a seat according to the preamble of claims 1 and 16 and to a method for controlling a seat according to the preamble of claim 17.
• All types of seat elements with a seat cushion and optionally a backrest are referred to as seats, for example office chairs , Bicycle saddles, seats in motor vehicles, etc.
• the object of the invention is to show ways to generate the described tilting movement in seats, in particular vehicle seats.
• At least one pair of adjusting elements is provided in the area of the seat cushion. These two actuating elements are to be arranged in mutually opposite regions of the seat cushion and are to be controlled in such a way that they execute an opposing lifting movement between a lower and an upper position. The opposite upward and downward movement results in a tilting movement about a longitudinal or transverse axis of the seat. Make sure that the tilt axis is as close as possible to the buttocks of the person sitting on the seat cushion.
• the control elements may only generate a pure tilting movement; an up and down movement of the seated person, which would result in a lasting impairment of well-being, must be avoided.
• control element can also be provided in each side or front and rear half of the seat cushion.
• the actuating elements assigned to one another in pairs are preferably controlled alternately by a common drive, it also being possible, of course, to individually control each individual actuating element.
• Claims 2 to 4 show different possibilities for the arrangement of the adjusting elements.
• the entire seat is tilted, which can be implemented especially with seat constructions with a rigid seat shell.
• the adjusting elements are arranged between the support structure and the cushion part.
• the support structure can in turn be spring-loaded.
• the adjusting elements are arranged directly in the upholstery part (claim 4), only minor changes to the supporting structure of the seat are required. Due to the small distance between the adjusting elements and the seat cushions of the seated person, the tilting movement is transmitted directly.
• the control elements can also be arranged in a direct line below the ischial humps. The movement of the adjusting elements is minimal due to the cushioning layer in between cushioned and thus slightly “washed out” the tilting movement to increase the seating comfort. In general, when introducing the control elements, care must be taken to ensure that seating comfort is affected as little as possible by the control elements used close to the body.
• Adjusting elements according to claim 5 are particularly simple in construction and in adaptation to the respective application. They are also inexpensive to manufacture.
• control elements for example, elements with flexible walls come into question, for. B. bubbles or bellows made of a rubber-elastic material. Due to the relatively large weight forces exerted by the seated person, it is advisable to reinforce the bladders, bellows, etc. with a tissue insert.
• Rolled bellows are particularly suitable because they have flat, rigid boundaries on the top and bottom sides for connection to the seat structure.
• Short-stroke cylinders with a rigid chamber wall can also be used to act in the same way as the control elements mentioned. Such cylinders are distinguished by a correspondingly large diameter with a small adjustment path and thus take up an installation space which essentially corresponds to the space required for bellows-type actuating elements.
• the actuating elements according to claim 5 can be operated with air or with a liquid.
• Air-filled adjusting elements are particularly suitable for an arrangement in the upholstered part of the seat cushion, since they adapt to the shape of the seat bumps and do not give the impression of a hard insert. Because of the pressure and temperature dependence of the air volume in the control elements, however, suitable measures for regulating the adjustment path of the control elements are required, for example by means of distance measurement on the control elements.
• control elements When the control elements are operated with a liquid medium, a defined and reproducible control path can be realized due to the incompressibility of the liquid, so that the control or regulation of the control path can be carried out by simply measuring the volume flow to and from the control element.
• the control or regulation of the control path can be carried out by simply measuring the volume flow to and from the control element.
• the intransigence of liquid-filled control elements Order directly in the upholstery near the stools of a seated person is only possible with restrictions
• the medium for the adjusting elements is provided in separate working chambers.
• the medium is transferred from the first working chamber into the associated adjusting element, the medium is simultaneously withdrawn from the other adjusting element into the second working chamber, so that the push-pull according to the invention automatically adjusts
• the emptying of the actuating element, which is in its elevated position, is supported by the weight of the person sitting.
• the working chambers and the drive for the volume shift can advantageously be arranged outside the immediate seating area, so that only a small installation space is required within the seat or the seat cushion
• the tilting movement can be realized, for example, by a double-acting pneumatic or hydraulic cylinder.
• a defined and reproducible working stroke of the actuating elements can be achieved by measuring the piston travel.
• bellows-shaped working chambers can also be provided.
• a piston pump can also be used instead of a rotary vane pump, which also promotes a measurable volume flow when using a liquid medium. Due to the pulsations that occur, the use of piston pumps is limited to smaller individual volumes. If necessary, multi-piston pumps are to be used.
• At least two adjusting elements are arranged one above the other on two opposite areas of the seat cushion, each of the adjusting elements having a fixed adjustment path between the two defined and reproducible states "adjusting element completely emptied” and "adjusting element completely filled” can perform.
• Appropriate filling or emptying of the individual actuating elements can thus be used to approach different actuating heights in steps. According to the invention, this is possible without distance measurement, which would require a sensor system, with particularly little effort, for example with simple control via valves, which only generate the two states “unpressurized” or “full operating pressure”.
• the number of control elements arranged one above the other determines the number of possible control positions.
• control elements are preferably elements with flexible walls, for. B. bubbles or bellows made of a rubber-elastic material. Due to the relatively large weight forces exerted by the seated person, it is advisable to reinforce the bladders, bellows, etc. with a tissue insert.
• bubble-like control elements there is a very small space requirement, since the overall height of the control elements in the initial state is determined only by the sum of their Wall thickness is determined.
• Rolled bellows are also particularly suitable because they have flat, rigid boundaries on the top and bottom sides for connection to the seat structure.
• Short-stroke cylinders with a rigid chamber wall can also be used in a manner equivalent to the control elements mentioned. Such cylinders are characterized by a correspondingly large diameter with a small adjustment path and thus take up an installation space which essentially corresponds to the space required for bellows-type actuating elements.
• the non-pressurized state of both actuating elements marks the lower position, the overall height of which, for example with bubble-like actuating elements, is determined solely by the sum of the wall thicknesses of the two bubbles.
• a middle position results from pressurization of one of the two adjusting elements, while the second adjusting element remains depressurized.
• the upper position can be approached in a defined manner by pressurizing both adjusting elements. If the two control elements are designed in the same way, a middle position can be approached, which is exactly in the geometric center between the lower and upper position.
• the pelvis is tilted about the longitudinal or transverse axis of the seat, as described in claim 22.
• the claimed control also includes embodiments with more than two control elements arranged one above the other.
• the actuating path - provided the actuating element is designed appropriately - is largely independent of the load on the actuating element and the ambient temperature. This allows reproducible adjustment paths to be achieved in a particularly simple manner.
• Pneumatic control elements are generally of a simpler design and easier to control than liquid-filled control elements. Because of the compressibility of the gaseous medium and its strong temperature dependence However, the (maximum) travel is not reproducible.Therefore, it is proposed according to claim 12 to automatically limit its travel by means of an additional device on the control element.Therefore, regardless of the load on the pneumatic control element, a defined maximum travel range is maintained if the control element with a Internal pressure is applied, which is greater than would be necessary due to the effective inner surface of the control element and the respective load by a seated person. This ensures that a constant adjustment path is maintained without additional measures, such as a distance measurement
• Path limits are provided in the interior of the control element. These path limits preferably consist of a flexible, non-stretchable material. In the case of control elements with walls made of a plastic material, they can be welded directly to the control element during manufacture. This results in a particularly simple construction and an inexpensive one Manufacturing
• the wall sections in actuating elements made of a plastic material can be welded to each other in sections, as viewed in the adjustment direction, so that this welding also results in a path limitation (comparable to the stitching, for example in the case of air mattresses).
• a path limitation component to the stitching, for example in the case of air mattresses.
• external path limitations are also possible, whereby the partially or circumferentially annular wrapping of the actuating element, for example by means of straps made of flexible and non-stretchable material, is preferably the path limitation on the outer circumference of the actuating element is additionally fixed in order to reliably prevent slipping in the depressurized state of the actuating element
• actuating elements can be actuated using simply constructed valves. A sensor for evaluating the respective actuating height is not necessary. In addition, with several seats, for example in a vehicle, a central air supply with a single pressure source is sufficient
• a shut-off valve can be provided between the steep elements, for example of the two seat halves, by means of which an exchange of the medium between the adjusting elements is reliably prevented.
• the shut-off valve is activated by the user when the device for generating a Tilting movement is switched off and the seat cushion is to be fixed in an “inclined” position by “locking” the adjusting elements in different height positions.
• the shut-off valve prevents slow overflow of the medium, for example due to leakage in a pump.
• Such an application is used, for example for seat users who need an oblique position of the seat cushion for orthopedic reasons
• Claims 15 to 19 show, by way of example, further basic operating principles of control elements.
• the above-mentioned operating principles can be implemented by a motorized actuator, for example an electric motor, or else with a pressure medium.
• electric motors are characterized by a small space requirement and their simple controllability.
• the motorized actuators can also be used All known transmission elements can be combined, for example with Rotatonic or linear gears, eccentrics, toothed racks, etc.
• pressure medium drives hydraulic media are preferred due to the better control options and the higher working pressures
• Wedge-shaped elements in particular wedge-shaped disks that are rotated against each other, can achieve high changes in the area of the seat stools of the seated person.
• the wedge disks can in this case be mounted against one another to reduce the friction via the roller body
• the tilting of the seat cushion is realized by an actuating element acting on one side.
• This tilting is particularly suitable for seats whose seat cushion has a rigid “seat pan” that can be tilted as a whole about a predetermined central axis.
• the tilting can be done via an actuating element that engages on one side but can also be used for seats with a spring core substructure, in which case a tilting axis is automatically set approximately in the middle of the seat cushion.
• the actuating element is preferably arranged outside the supporting structure of the seat cushion.
• the actuating element can also be arranged between the supporting structure and the upholstered part as adjusting elements For example, basically all of the above-mentioned embodiments are possible
• Claim 21 describes a method with which, regardless of the sitting position or the body weight of the seat user, a constant central position for a bubble-like adjusting element (according to claim 5) can be achieved
• Certain types of pumps e.g. rotary vane pumps
• rotary vane pumps emit a fixed number of measurable pulses with each revolution, with a linear combination of Relationship between the number of impulses and the required amount of liquid
• the required liquid flow is, however, dependent on various parameters within certain limits, e.g. drive direction of the pump, pump or suction operation, high pressure against which the demand or suction is made, etc
• an initial state is defined in which one of the control elements (e.g. control element 1) is just completely emptied.
• the pump then requests the liquid into the previously emptied control element 2 back until a fictitious central position of the control element 2 (and thus also the control element 1) is reached.
• the final value V21 is determined for the reverse pumping direction from the actuating element 2 into the actuating element 1.
• the starting point for this payment is the initial value L21 (corresponds to the value V12). This gives a number of pulses N21 for the second pumping device
• N12 and N21 are now available, which indicate how many pulses are required to completely pump the liquid between the two control elements
• Dimensional numbers N12 and N21 are multiplied by previously empirically determined factors F12 and F21.
• the factors F12 and F21 are the same for a particular unit made up of seat and actuating elements. As a rule, factors F12 and F21 differ only slightly from each other, Simplifications can also be worked with a uniform factor F.
• the product F12 N12 or F21 N21 is used to approach the exact geometric center position of the two adjusting elements in the following cycle. It is remarkable here that this approach to the center position can take place without direct distance measurement, so that the method according to the invention is characterized by very little effort the dimensions N12 and N21 take into account the respective load on the seat by the occupant, so that after a single initialization cycle in which the values N12 and N21 are determined, the geometric center position of the actuating elements is exactly maintained
• the seat load is largely determined by the body weight of the seat user and the contact area between the seat user and the seat cushion.
• the seat position of the seat user also influences the values N12 and N21, depending on whether the right or left or the front or rear seat half is heavily loaded.
• 1 is a seat cushion with adjusting elements arranged outside the supporting structure
• Fig. 2 is a seat cushion with adjusting elements between the support structure and the
• Upholstered part, 3 shows a seat cushion with adjusting elements inserted into the upholstery part
• FIG. 16 shows an arrangement of control elements according to the invention according to FIG. 15 in a motor vehicle seat
• FIG. 18 shows an arrangement corresponding to FIG. 16 with two pressure sources.
• Fig. 1 shows a seat cushion 1, which is composed of a support structure 2 and a cushion part 3.
• the middle part of the seat cushion 1 is designed as a seat surface 4, while the side regions 5 are designed in the form of a bead.
• actuating elements 6 engage, which can assume a central position M and an upper and a lower position O and U, respectively. Since the support structure 2 is resiliently supported within a certain limit (suspension 8) in relation to a seat frame or a seat suspension (not shown), the right and left are moved in the opposite direction Adjusting elements 6 generates a tilting movement of the seat cushion about a tilt axis 7, which lies in the longitudinal center plane 9 of the seat cushion 1
• FIG. 2 shows a seat cushion 11, in which the actuating elements 16 are arranged between the supporting structure 12 and the cushion part 13.
• Flat actuating elements 16 are particularly suitable for this purpose.
• the individual positions that the actuating elements 16 can assume are again identified by M, O and U.
• Transition areas 18 between the beads 15, which are connected relatively rigidly to the support structure 12, and the seat surface 14 enable the tilting movements caused by the adjusting elements 16 to be compensated for.
• the support structure 12 can in turn be spring-loaded, as illustrated in FIG. 2 with the aid of the springs 17 shown in broken lines
• adjusting elements 26 are preferably designed as air-filled bladders or flat-construction roller bellows. They can be inserted into the cushion part inserted or glued or also foamed by the material of the cushion part 23
• FIG. 4 shows a double-acting cylinder 40 which controls adjusting elements 46a and 46b via connecting lines 41.
• the cylinder has a first and a second working chamber 42 or 43 which are separated from one another by a piston 44.
• the piston can be moved via a piston rod 45 are displaced, the volumes of the two working chambers 42 and 43 increasing or decreasing in opposite directions.
• a second piston rod 47 ensures that the volume in the two working chambers 42 and 43 is equal.
• control elements 46a and 46b are shown as control elements 46a and 46b on the left and right, whereby identical control elements are of course to be provided on both sides of a system that has been executed.
• the control element 46a is designed as a bubble-shaped structure with walls 48 that are flexible on all sides, while the control element 46b is of a bellows-like structure with an upper one and a lower cover plate 49 or 50 and a rubber-elastic bellows 51 is formed
• the working chambers 62 and 63 are accommodated in a housing 60 and are formed by bladders or rolling bellows, which are connected via connecting lines 61 to actuating elements (not shown).
• the housing 60 guides a slide 64 which is parallel to the lateral boundary walls 65 of the housing 60 can be moved (path s)
• the two working chambers 72 and 73 are arranged in a housing 70 which is approximately V-shaped in cross section.
• a pivot plate 74 is pivotably mounted on the intersection of the two boundary walls 75 of the housing 70 (pivot axis 71), so that the plate 74 can be adjusted in the case of a force application, for example at the point of application 77 or a torque application on the swivel axis 71 (swivel angle ⁇ )
• the adjusting elements according to FIGS. 4 to 6 are adjusted in opposite directions via separate fluid circuits.
• the adjustment can be carried out, for example, via a linear and reciprocating linear drive, an eccentric drive, etc.
• a reservoir working chambers 42, 43 or 62, 63 or 72, 73
• the associated control elements are filled or emptied
• the adjusting elements 86a and 86b according to FIG. 7 are directly connected to one another via a rotary vane pump 80 and become in opposite directions pressurized
• the rotary vane pump 80 has a plurality of chambers 81, which require a defined chamber volume.
• the individual chambers 81 are separated from one another by means of radially movable slide valves 82 and are sealed off from the pump housing 83.
• the arrangement shown in FIG. 7 allows separate chambers to be provided of the working medium, which results in a particularly compact design.
• the rotary vane pump 80 can be driven, for example, by an electric motor, the speed of which is detected by a Hall sensor, so that when liquid media are required, the travel on the actuating elements 86a and 86b is easily controlled or regulated can be
• shut-off valve 89 which acts in both flow directions and by means of which an exchange of the medium between the two adjusting elements 86a and 86b can be prevented in order to achieve a static "misalignment" of the seat cushion of the vehicle seat.
• the misalignment becomes, for example in that the valve 89, which is in the de-energized state, is briefly energized, so that a leakage current flows through the leakage gaps of the rotary vane pump 80 under the weight force and, if necessary, a consciously influenced weight distribution of the seat user, and the desired imbalance is set
• actuating elements 96 each having a spindle nut 91 and a spindle 92. Both actuating elements 96 are driven by an electric motor 90 via a drive shaft 93.
• the spindle nuts 91 convert the rotational movement of the shaft 93 into a vertical movement of the plate-shaped transmission elements 94.
• the spindle nuts are 91 supported by springs 95 relative to the seat structure 98
• the pairings "spindle nut 91 - spindle 92" have a right-hand or left-hand thread for each half of the seat cushion, in order to achieve an opposite movement of the two transmission plates 94 when the shaft 93 rotates
• FIG. 9 shows lever arrangements 101 with which a direct application of force to transmission plates 104 takes place.
• the transmission plates 104 are, for example, direct arranged below the seat humps of a seated person, a sufficiently thick layer of the cushioning material of the seat cushion ensuring a high level of comfort.
• the levers 101 are mounted on the seat structure via bearing points 102.
• the force is introduced at points 103, as shown, for example, by arrows F, as a result of which the height of the transfer plates 104, which are articulated at the end section 105 of the lever 101, change in opposite directions.
• the adjusting elements 116 according to FIG. 10 are designed as scissor-type lifting rods. They consist of a lower and an upper pair of scissors 11 and 112, respectively, which are moved by a cable 13. When the cable 113 on the left adjusting element 116 is shortened in accordance with the arrow 11, the scissors 11 1 and 112 are moved in the direction of their folded position, as a result of which the transfer plate 114 is shifted upward (arrow 119). The adjustment of the cable pull 13 takes place via a reciprocating drive 110, which in each case generates an opposite movement on the two actuating elements 116. Parallel to the raising of the right adjusting element 116, the left adjusting element 116 is brought into a lowered position by the weight of the seated person and / or a spring 118.
• FIGS. 1 1 and 12 show a seat cushion 201, on one side engages a single control element 206.
• the actuating element 206 consists of an eccentric drive in the left rear area of the seat cushion 201.
• the seat cushion 201 has a rigid support structure 202, which is connected via springs 207 with its rear connection points 208 to two rear seat rail sections 210 and via a front connection point 211 is mounted on a central front seat rail section 212.
• This “three-point bearing” results in the illustrated one-sided actuating movement via the eccentric drive 206 causing the seat cushion 201 to tilt about the tilt axis 207.
• FIGS. 13 and 14 illustrate a method according to the invention for moving to a geometrical central position in the case of actuating elements at the level of the liquid bed, such as the actuating elements 86a and 86b from FIG. 7
• FIG. 13 the stroke s of the first adjusting element 86a is plotted against the time t with a solid line.
• the stroke s of the second adjusting element 86b indicated by the dashed line runs in opposite phase to this.
• the tilting movement of the The seat cushion produces a movement of the lumbar sections of the spine of a seated person.
• the individual phases of the tilting movement of the seat cushion about the tilt axis 7 are illustrated symbolically in FIG. 13
• the actuating element 86a is initially filled with liquid (full duration t F ) so that a central position M (half the maximum travel) is established. After a holding time t H , the actuating element 86a is completely filled with the liquid ( State V) The degree of fullness is then reduced to such an extent that the middle position M is again set in order to subsequently return to the initial state L in the last section of the cycle.
• the filling holding times t F and t H are in the selected example during the individual phases of the cycle are of the same size and constant over the cycle duration. For example, t F or t H are 10 seconds, so that a cycle duration of 80 seconds results
• the number N of the pulses occurring at the pump is plotted against the time t.
• the pump 80 requests the liquid from the actuating element 86a into the actuating element 86b (solid line on the left Part of the diagram), while in the second half of the cycle the pumping direction is reversed (dashed line in the right part of the diagram)
• the control element 86a is filled up to the value F12 N12 at the beginning of the new cycle.
• the geometric central position M of the actuating element 86a is thus reached.
• the actuating element 86a is then completely filled, a significant pressure drop in the pump 80 being used as a measure for the complete filling. This pressure drop occurs with the synchronous, complete emptying of the control element 86b.
• the liquid is withdrawn from the actuating element 86a, with a corresponding dwell time in the middle position M.
• This emptying of the actuating element 86a is controlled via the filling of the actuating element 86b (dashed line), a value taken from the previous cycle N21 in connection with the specific factor F21 ensures that the middle position M is maintained in the same way.
• the factors F12 and F21 are determined by the manufacturer and do not change significantly over the life of the seating system.
• FIG. 15 shows an actuating element 301 with flexible walls 302 (FIG. 15) and an air supply 303.
• the upper and lower walls 304 and 305 of the actuating element lie directly on top of one another.
• the pressurized state solid lines
• the two walls 304 and 305 are spaced apart and form one bubble-shaped body.
• two webs 306 are provided, which are welded to the walls 304 and 305 of the control element 301.
• the webs 306 consist of a flexible but non-stretchable plastic material and form a path limitation in the direction of the travel s.
• a constant internal pressure p 1 is provided via the air supply 303, the force effect of which outweighs a maximum external weight load.
• the webs 306 limit the travel s to the value s max even at a lower load G.
• the depressurized state of the control element 301 represents the output path s min , the amount of which is determined by the wall thicknesses of the walls 304 and 305.
• two seat elements 31 1a, b and 311 c, d arranged one above the other are arranged in a seat cushion 310 of a motor vehicle seat per seat half.
• the individual actuating elements 31 1a to 311d are constructed in a manner comparable to the actuating element 301 and are connected to a pressure source 322 via air feeds 313 and valves 320.
• the valves 320 are controlled via a control device 321.
• the adjusting elements 311a to 311d are each arranged in the seat cushion 310 below the seat bumps 323 of the pelvis 324 of a person sitting on the seat cushion 310.
• the actuating elements 311 a to 311d are either switched to zero pressure or the operating pressure p is applied via the valves 320. Accordingly, the actuating elements 311 a to 311d take up two exactly defined actuating heights s min or s max (analogously to FIG. 15).
• two adjusting elements 311 a, b and 311 c, d one above the other, three positions O, M and U can be reached on each side of the seat cushion via the valves 320 and the control device 321. 17, the pelvis 324 is tilted about a tilt axis 325.
• the two dash-dotted lines 326 illustrate the two opposite maximum tilting positions of the pelvis 324, while the dashed line 327 represents the central position of the pelvis 324, with only one adjusting element 31 1 a or 311 b or 31 1c or 311d for each seat cushion side Pressure is applied.
• 18 shows an actuating device with two separate pressure sources 332, which supplies actuating elements 331a to 331d via air feeds 333.
• Each of the pressure sources 332 connects an actuator of one seat half to an actuator of the other seat half.
• the two pressure sources 332 work in phase opposition, so that the actuating elements 331a, b and 331c, d are each pressurized in opposite directions to one seat half and there is an overall tilting movement, as shown in FIG. 16.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Aviation & Aerospace Engineering (AREA)
• Transportation (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Analytical Chemistry (AREA)
• Seats For Vehicles (AREA)
• Chair Legs, Seat Parts, And Backrests (AREA)

Priority Applications (4)

Applications Claiming Priority (4)

Publications (2)

Family

ID=26037644

Family Applications (1)

Country Status (6)

Cited By (4)

Families Citing this family (32)

Citations (1)

Family Cites Families (26)

• 1997
  • 1997-06-21 DE DE19726410A patent/DE19726410B4/de not_active Expired - Fee Related
  • 1997-06-21 DE DE19726409A patent/DE19726409A1/de not_active Withdrawn
• 1998
  • 1998-06-22 JP JP50379599A patent/JP2002507900A/ja active Pending
  • 1998-06-22 WO PCT/EP1998/003810 patent/WO1998058568A2/de not_active Ceased
  • 1998-06-22 EP EP98938624A patent/EP0991342B1/de not_active Expired - Lifetime
  • 1998-06-22 ES ES98938624T patent/ES2164450T3/es not_active Expired - Lifetime
  • 1998-06-22 US US09/446,262 patent/US6398303B1/en not_active Expired - Lifetime
  • 1998-06-22 DE DE59801650T patent/DE59801650D1/de not_active Expired - Lifetime

Patent Citations (1)

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