Classifications

• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C1/00—Chairs adapted for special purposes
  • A47C1/02—Reclining or easy chairs
  • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
  • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
  • A47C1/026—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism
• • 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
  • A47C7/38—Support for the head or the back for the head
• • 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
  • A47C7/54—Supports for the arms
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C11/00—Pivots; Pivotal connections
  • F16C11/04—Pivotal connections
  • F16C11/10—Arrangements for locking
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
  • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
  • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
  • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
  • B60N2/235—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms

Definitions

• the present invention relates to a pivot fitting with the features of the preamble of claim 1.
• EP 1 284 447 discloses a pivot fitting in which a first tab is pivotable relative to a second tab, wherein the tabs can be held together at a predetermined angular position by a latching or locking mechanism.
• the locking mechanism comprises two pawls which are pivotally mounted and are in engagement with a toothing via a spring element.
• the metallic spring element presses the pawls into the toothing and can be pressed together to lift the pawls out of the toothing via a control disk and then to pivot the lugs into an initial position.
• the locking of the pawls is comparatively loud, because the metallic spring presses the pawls with high force against the teeth, and the
• the spring element for holding the pawls in a latched position is at least partially made of an elastomeric material.
• the spring forces can be made significantly lower than in a metallic spring element, which pushes the pawls with a certain spring force in the latched position already for reasons of tolerance compensation to a functional reliability of Verriegelungs, To ensure latching mechanism.
• this increases when pivoting the tabs, the locking noise, especially if the pawls are made of a metallic material. Due to the lower spring forces and the noise insulation of the elastomeric material can Swiveling the first and second tabs the locking noise can be significantly reduced.
• a contact surface of the spring element which bears against the at least one pawl, made of an elastomeric material.
• the contact surface can be arranged adjacent to the toothing in order to have good leverage ratios.
• the spring element is preferably made as a molded body made of an elastomeric material. Suitable materials for the spring element are plastics, rubber compounds or other elastic materials in question. Preferably, an elastomeric material having a Shore hardness between 40 and 1 10, in particular 60 to 90, particularly preferably between 70 and 85, is used.
• the spring element can be pivoted at least partially with the control.
• the spring element can have at least one hollow chamber which is surrounded by a bendable web. The bendable web can form a contact surface on the outside, which bears against the pawl.
• the spring element can essentially only apply a spring force to the at least one pawl if the pawl is not arranged in a latched position on the toothing.
• the spring element can thus be set exactly to apply spring forces only when the pawl has been slightly raised from the latched position.
• the control brings the pawl out of engagement with the toothing, and in addition, the spring element is relaxed, in order then to move the at least one pawl to an initial position on the toothing.
• the spring element is thus not unnecessarily burdened when switching the pawl to bring it out of engagement with the teeth, but can first apply a spring force to the spring element and is then relaxed via the control.
• the spring element is relaxed again via the control and then moved back to an initial position. In this initial position, the spring element is again clamped against the pawl, which is then moved into a latched position on the toothing. This reduces the spring forces even when moving the at least one pawl from an end position to an initial position.
• the control element can be designed as a control disk, wherein the spring element is supported with a portion on the control disk.
• the spring forces of the spring element do not act on the latching pawl substantially radially, but substantially tangentially to the pawl.
• the spring element can be supported for example by a projection of the control disk to exert sufficient spring forces on the pawl.
• the pivot fitting according to the invention is used in particular for furniture, for example in upholstered furniture, for armrests, headrests or other pivotable components.
• FIGS. 1A to 1 C show several views of a swivel fitting according to the invention in an assembled position
• Figure 2 is an exploded perspective view of
• Figures 3A and 3B show two views of the spring element of the pivot fitting of Figure 1;
• Figure 4 is a detail view of the pivot fitting of Figure 1 in an initial position
• Figure 5 is a view of the pivot fitting of Figure 1 shortly before a switching position
• FIG. 6 is a detail view of the control disk with spring element.
• a pivot fitting 1 comprises a first tab 2 and a second tab 3, which are pivotable about an axis 6 relative to each other.
• the first tab 2 in this case comprises a first part 20 and a second part 21, which are connected to one another at a radially projecting from the axis 6 portion and in the region of the axis 6 surrounding a central region of the second tab 3.
• a locking mechanism or a locking mechanism is provided which allows movement of the first tab 2 relative to the second tab 3 in a first direction and blocked in a second direction. In an end position, this blockage is canceled, and the tabs 2 and 3 can be moved back to a starting position.
• the locking mechanism has two pawls 5 which are rotatably mounted about an axis 7.
• the two axes 7 are arranged at a distance from the central axis 6 for pivoting the tab.
• the second tab 3 comprises an annular toothing 4, which is turned to the axis 6 and can be brought into engagement with a toothing 8 on each of the pawls 5.
• a spring element 9 is provided in the form of a shaped body of an elastomeric material which is rotatably mounted about the axis 6.
• the spring element 9 comprises at its radially outer region adjacent to the toothing 4, a contact surface 10 which bears against a pawl.
• the molded body has substantially the shape of an "8", so that in each case a contact surface 10 is formed on opposite sides for applying a pawl 5.
• a projection 17 is provided, which is formed on a control disk. The force on the pawl 5 by the spring element 9 is thus applied substantially tangentially with respect to the axis 6 or at a smaller angle to the tangential, for example, less than 30 °, in particular less than 15 °.
• the pivot fitting 1 is shown in an exploded view.
• the axis 6 is held on opposite sides on the lug 2 on the first part 20 and the second part 21 and supports both a control disk 14 and the spring element 9.
• the spring element 9 has a central opening 12 for passing through the axis 6.
• two hollow chambers 1 1 are provided adjacent to the opening 12, which are surrounded by bendable webs.
• a projection 13 is formed, which engages in a recess of the control disk 14 and is supported there on a projection 17.
• the control disk 14 has a central opening 15 for passing through the axis 6 and comprises two elongated holes 16 which are penetrated by the axes 7, on which the pawls 5 are rotatably mounted.
• the axes 7 are held on recordings 22 of the first part 20 and the second part 21.
• projections 18 are formed on the control disk 14, which can be brought into engagement with the pawls 5 to release them from the locked position with engagement of the teeth 4 and then to move from an end position back to an initial position.
• the spring element 9 Upon pivoting of the first lug 2 relative to the second lug 3, the spring element 9 is essentially only compressed when the pawl 5 is raised when sliding the teeth 8 of the toothing 4, that is moved radially inwards, so that the spring element pushes the pawls 5 back into a locked position. In the latched position, no or only very small spring forces, since the pawls 5 in
• the first tab 2 can thus be pivoted relative to the second tab 3 from a starting position to an end position, where then the control disk 14 is stopped by a stop and the pawls 5 are rotated relative to the control disk 14. This process requires a certain angular travel.
• the spring element 9 is equally compressed at the contact surfaces 10, as in a conventional switching operation in the working area of the pivot fitting. 1 After exceeding half the angular path and a further movement of the first tab 2 relative to the second tab 3, the contact of the contact surfaces 10 is interrupted at the same time to the inward pivoting of the pawls 5 to the pawls 5 and the spring element 9 thus relieved.
• the first tab 2 is moved back relative to the second tab 3 from the end position to an initial position, wherein the pawls 5 are held out of engagement.
• Disengagement of the pawls 5 can take place in different ways, for example, as described in the document EP 1 284 447.
• the spring element 9 In the initial position, the spring element 9 is then pressed against the pawls 5 again, in order then to release the pawls 5, so that they can again pivot radially outwards and into engagement with the Gearing 4 arrive. In this way, the load on the spring element 9 when switching at the end position or the initial position is reduced to a minimum, since the spring element is only briefly compressed.
• the spring element 9 When moving the first tab 2 relative to the second tab 3 from the end position to the initial position, the spring element 9 remains largely unloaded. As a result, a setting behavior of the elastomeric material is largely avoided.
• the spring element 9 is shown in detail.
• the spring element 9 is produced as a shaped body made of an elastomeric material, in particular a rubber or a plastic, for example a foamed plastic.
• the Shore hardness of the material may be in a range between 70 and 90 Shore, to apply sufficient spring forces on the pawls 5, without generating when swiveling the tabs 2 and 3 relative to each other too high locking noise.
• the molded body has two hollow chambers 1 1, which are surrounded by bendable webs on which the contact surfaces 10 and the projection 13 are formed. Other forms of spring element may be used to provide low noise damping.
• FIG. 4 shows the swivel fitting of FIGS. 1 and 2 in a detailed view in a starting position, a cover having been omitted for better clarity, and components not visible being shown in broken lines.
• the first tab 2 can be rotated about the axis 6 from this starting position relative to the second tab 3, in which case the pawls 5 are rotated about the axes 7 and then latched along the annular toothing 4 on the second tab 3.
• the spring element 9 lies in each case with the contact surface 10 against the pawls 5 in a region adjacent to the toothing 8.
• the spring element 9 is supported via the projection 13 on the projection 17 of the control disk 14.
• the projection 13 of the spring element 9 serves for suspending the spring element 9 in the recesses of the control disk 14.
• the projection 13 of the spring element 9 fixes the spring element 9 on the control disk 14 by its shape and prevents axial slippage the spring element 9 to the axis 6. This fixation also facilitates the assembly.
• the control disk 14 rotates together with the first tab 2, so that the radially protruding portions 24 can move to the stops 23 on the second tab 3.
• the pivoting range of the first tab 2 relative to the second tab 3 can be adjusted.
• the tabs 2 and 3 are pivoted by a pivoting angle of 90 ° relative to each other from a starting position to an end position, wherein after reaching the position shown in Figure 5 further pivoting of the tab 2 causes that through the stops 23, the control disc 14 ensures that the pawls 5 are raised from the gearing 8 and the spring element 9 is relieved.
• the projections 18 engage the pawls 5 and lift them out of a latched position.
• the initially compressed spring element 9 is relaxed again. In this position, the tabs 2 and 3 can then be moved back into the starting position, which is shown in FIG.
• a radially projecting portion 24 of the control disc reaches a stop 23 on the second tab 3 and is stopped, so that the projection 18 of the control disc no longer holds the pawls 5 out of engagement with the teeth 8 and pivot them back into a detent position.
• the spring element 9 is again moved to the starting position shown in FIG. 4, in which the pawls 5 are held in the latched position or slightly biased.
• the spring element 9 may instead of the hollow chambers 1 1 also have a closed shape.
• the support of the spring element 9 instead of by a projection 13 can also be effected by a tab which is bent from the control disk 14.
• the spring element is formed integrally with the control disk 14, for example produced by a two-component injection molding process. This reduces the number of components, which simplifies assembly.
• the spring element can also be fixed to the pawls or formed integrally therewith.
• the spring element can be fixed to the pawls as a soft component.
• the pawls on a radial internal toothing of the tab 3 can be latched.
• a radial Locking it is also possible to make an axial latching, in which case the teeth in an axial direction of the pivot fitting relative to the axis 6 is made.
• the control element 14 it is possible not to form the control element 14 as a separate component in the form of a control disk, but it may also be a control section on a pawl or on the spring element. This too can reduce the number of components on a pivot fitting.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Health & Medical Sciences (AREA)
• Dentistry (AREA)
• General Health & Medical Sciences (AREA)
• Mechanical Engineering (AREA)
• Chairs For Special Purposes, Such As Reclining Chairs (AREA)
• Mechanical Operated Clutches (AREA)
• Prostheses (AREA)
• Pivots And Pivotal Connections (AREA)
• Springs (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=51257517

Family Applications (1)

Country Status (8)

Cited By (2)

Families Citing this family (7)

Citations (3)

Family Cites Families (24)

• 2013
  • 2013-08-09 DE DE102013108665.9A patent/DE102013108665A1/de not_active Withdrawn
• 2014
  • 2014-07-31 PL PL14744879T patent/PL3030108T3/pl unknown
  • 2014-07-31 WO PCT/EP2014/066554 patent/WO2015018744A1/de active Application Filing
  • 2014-07-31 US US14/910,880 patent/US9790985B2/en active Active
  • 2014-07-31 CN CN201480044446.2A patent/CN105578927B/zh active Active
  • 2014-07-31 ES ES14744879.9T patent/ES2642129T3/es active Active
  • 2014-07-31 EP EP14744879.9A patent/EP3030108B1/de active Active
  • 2014-07-31 RU RU2016107662A patent/RU2646729C2/ru active

Patent Citations (3)

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