Classifications

• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47C—CHAIRS; SOFAS; BEDS
  • A47C20/00—Head -, foot -, or like rests for beds, sofas or the like
  • A47C20/04—Head -, foot -, or like rests for beds, sofas or the like with adjustable inclination
  • A47C20/043—Head -, foot -, or like rests for beds, sofas or the like with adjustable inclination by means of peg-and-notch or pawl-and-ratchet mechanism

Definitions

• the invention relates to a head or foot rest which can be reversed in an upper position and has a plurality of step catches for pivotable frame parts such as, for example, mattress frames, consisting of a C-rail articulated on the mattress frame by means of a fastening piece with a locking toothing, and one on the pivotable frame part by means of a fastening piece articulated support, a swivel joint for connecting the end of the support to the articulated end of the C-rail and a toothed strut articulated on the support, the latching end of which projects through a longitudinal opening in the C-rail onto the latching toothing and with an arrangement for detent-free return is combined in their starting position.
• pivotable frame parts such as, for example, mattress frames, consisting of a C-rail articulated on the mattress frame by means of a fastening piece with a locking toothing, and one on the pivotable frame part by means of a fastening piece articulated support, a swivel joint for connecting the end of
• a backrest or headrest adjustment device for sitting and reclining chairs or the like has become known. Consisting of an articulated pair of levers, the angular position of which can be changed by a support lever engaging a toothing, devices being provided which bring about a free, non-invasive decline of the support lever from the highest position to the initial position.
• the support lever is tooth-like. When the adjustable part is folded up, it falls into the teeth of the lower lever of the pair of levers due to its own weight. It is guided in a slot of the lower lever with cams, the upper one of which is displaced in the highest position of the supporting lever by means of a spring through a recess in the guide of the lower lever.
• the lower lever is box-shaped in this adjusting device and, on the side facing the adjustable part, has a longitudinal opening in which the support lever is guided, and through which its support end engages with a locking tooth with the toothing in the lever.
• This known backrest and headrest adjusting device has disadvantages.
• the teeth of the toothing of the box-shaped lever which come into engagement with the locking tooth of the support lever in each detent position, can only bear a small load. With continuous use, there is a risk that the latching ability of the ratchet tooth and toothing will wear out and, for example, no longer remain in engagement in the case of shock-like loads.
• the upper lever of the adjusting device is only a simple sheet metal strip which is articulated to the lower box-shaped lever. It has further been found that in this known actuating device the device which causes the support lever to drop without engagement from the highest position to the initial position is susceptible to failure.
• an adjusting device for head and foot part brackets on reclining furniture which is fastened to the frame and to the head or foot part brackets in a known manner. It essentially consists of a guide bar which is box-shaped and is provided with a longitudinal opening, a locking strut which is articulated on an adjusting lever and a runner with a profile window, which is used to guide the locking end of the strut. This latching end is provided with a strut nose which engages in adjusting holes in the guide bar (DE-GM 5924799).
• the present invention is based on the object of creating a head or foot plate for particularly high loads with good lateral stability, which is simple to manufacture and whose individual parts can be used equally well for various exemplary embodiments.
• the locking toothing of the C-rail includes locking surfaces arranged in parallel and that the locking teeth of the toothed strut are provided with corresponding locking surfaces, such that the locking surfaces of the locking toothing and the locking surfaces of the toothed strut are subjected to the highest load in each step locking rest the engaged teeth.
• the measures that must be taken in individual cases with the head or foot actuators according to the invention in order to achieve this depend on the pivoting radius of the locking joint by which the toothed strut is connected to the carrier.
• the lateral stability of the head or foot actuator is achieved with a slightly designed frame in that the carrier consists of two side struts of a Y-carrier, the lower ends of which are articulated to the C-rail and articulated on the swivel joint are and their front ends - diverge - between the locking joint and the fastening piece.
• This divergence depends on which side stability is to be achieved. It is particularly advantageous that this design of the carrier, but also a simpler design, can be combined with the same C-rail. For both of the exemplary embodiments shown, the C-rail and toothed strut can be used unchanged.
• fastening pieces with fastening plates and fastening angles are provided, which can be connected by pins to the associated pivot openings of the carrier or C-rail.
• a particularly simple manufacture results if pivot pins are pressed out or pulled out of the fastening angles.
• This design allows a releasable connection between the fasteners and the carriers or the C-rails.
• pivot pins can also be expressed from the front ends of the C-rails and supports are that can be flexibly and articulately connected to the mounting brackets or the pivot holes contained therein.
• FIG. 1 is a perspective schematic view of a head or foot plate in connection with a Rarimen, F Fiigg .. 2 2 a toothed strut,
• FIG. 5 is a plan view of the embodiment of FIG. 4,
• FIG. 6 shows a partial sectional view along the line VI / VI in FIG. 4,
• FIG. 7 shows a schematic side view of a second exemplary embodiment of the invention
• FIG. 7a shows a section through FIG. 7 along the line VIIa / VIIa
• Fig. 8 shows a construction detail
• F Fiigg .. 9 9 schematically a locking joint
• Fig. 10 different mounting brackets.
• FIG. 1 shows a head or foot rest, generally designated 1, whose support 22, 24, 25 is articulated, for example, to a pivotable frame part 3 and its so-called C-rail 15 on the mattress frame 4.
• the C-rail 15 and the beams 22, 24, 25 are connected to one another in an articulated manner by means of a swivel joint 26.
• a toothed strut 29 is articulated on the supports 22, 24, 25 by means of a locking joint 43, the locking end 30 (FIGS. 2 and 3) of which extends through a longitudinal opening 18 in the C-rail 15 and in each step locking device 2 with locking teeth
• joint ends 23 and 16 are referred to as joint ends 23 and 16, respectively.
• the latching end 30 of the toothed strut 29 has latching teeth 31, 32, 33 and 34, of which - particularly in the lower step latches 2 - at least two are in engagement with the latching toothing 17.
• each locking tooth 31 to 34 has a locking surface 35 and a tip 36.
• These tips 36 are arranged in such a way that two adjacent tips 36 each lie in a functional level 37 of the first two locking teeth 31 and 32 in the first step locking 2 corresponding to the locking point A, parallel to the level 21 of the locking teeth 17 in the C Rail 15.
• the functional levels 38 and 39 of the second and third or third and fourth locking teeth 32, 33, 34 rise in this first step locking relative to the plane 21 of the locking teeth 17.
• the locking teeth 17 of the C-rail 15th consists of parallel latching surfaces 20, which are arranged obliquely to a plane 21.
• the latching surfaces 35 of the latching teeth 31 to 34 involved now lie parallel to the latching surfaces 20 of the latching teeth 17. Since the latching surfaces 20 and 35 are in the step latches the specific surface pressure becomes low. In this way, the head or foot switch 1 according to the invention is able to absorb loads that are much higher than the previously known designs of this size.
• the C-rail 15 has ten locking surfaces 20, whereas the locking end 30 of the toothed strut 29 is provided with four locking surfaces 35.
• the locking joint 43 describes an arc with the pivot radius 45 and the pivot joint 26.
• the essential step detents 2 are the locking points on the circular arc of the locking element steer 43 and labeled A ,, A 2 , A 3 and A. Depending on these latching points A. to A., the relative positions of the latching end 30 of the toothed strut 29 to the latching toothing 17 of the C-rail 15 are shown in FIGS. 3b-e.
• the locking surfaces 35 of the locking teeth 31 and 32 rest against the locking surfaces 20 of the locking teeth 17 at the locking point A.
• function levels 37 and level 21 of the locking teeth 17 run parallel to one another.
• FIG. 3c shows the relative position of the locking teeth 17 and the locking end 30 at the locking point A 2.
• the functional level 38 runs parallel to the plane 21 of the locking toothing 17.
• FIG. 3d shows the relative position of the locking teeth 17 and the locking end 3 at the locking point A 3 , in which the locking surfaces 35 of the locking teeth 33 and 34 rest against the locking surfaces 20 of the locking teeth 17.
• the functional level 39 runs parallel to the level 21 of the locking teeth 17.
• the carrier is formed in two parts. It consists of the two side struts 24, 25 of a Y-beam, which run parallel to the C-rail 15 between the swivel joint 26 and the locking joint 43. Their joint ends 16 to 23 are connected to the C-rail 15 by means of the swivel joint 26.
• Fig. 5 shows this training in plan view.
• FIG. 6 shows a partial sectional view along the line VI / VI in FIG. 4 and clearly shows the diverging front ends of the side struts 24 and 25 of the Y-beam. 6 also shows the box-shaped structure of the C-rail 15, through whose longitudinal opening 18 the toothed strut 29 projects. This is articulated in a manner explained later by means of the locking joint 43 with the side struts 24 and 25 of the Y-beam.
• a reversing slide 19 can be seen, which is shown in a side view in FIG. 2a. It has a run-up curve 19a into which a guide pin 29a of the toothed strut 29 slides during the return, whereby the latching teeth 31 to 34 disengaged from the latching toothing 17 when the head or foot actuator 1 is returned to its rest position become.
• Two control slides 19 can be used to the right and left of the latching end 30.
• FIG. 7 and 7a show a second exemplary embodiment of the invention with the same C-rail 15.
• the locking teeth 17 and the plane of the locking teeth 21 are only indicated schematically.
• a U-shaped support 22 is articulated by means of the swivel joint 26 and, as can be seen in cross section in FIG. 7a, has a U-shaped cross section 28.
• the support lever 22 In the idle state of the head or foot actuator, which is shown in FIG. 7a, the support lever 22 encloses the latching rail 15.
• the latching strut 29 articulated in the latching joint 43 by means of the joint pin 42 is only shown schematically as a line.
• pivot pins 10 can be driven out of the fastening angles 9.
• the pivot openings 27 at the front ends of the side struts 24 and 25 can be inserted loosely from the inside onto the pivot pins 10 according to FIG. 8. However, as can be seen in FIG. 8a, they can also be riveted together. Without changing anything at the core of the invention, the pivot pins 10 can, however, also be expressed or driven out of the front ends of the side struts 24 or 25 of the Y-beam.
• the pivot openings 27 would then be provided in the mounting brackets 9.
• a corresponding type of fastening can also be provided between the fastening pieces 6 with their fastening plates 8 and the corresponding parts of the head or foot plate 1.
• FIG. 10 Further fastening options are shown schematically in FIG. 10. It is thus possible to carry out the fastening by means of a spring clip 11, in which pivot openings 46 are provided which sit on the pivot pin 10. These can - as indicated - from the C-rail 15, but also from the side struts 24 and 25 of the Y-beam.
• pivot openings 46 can be inserted over the ends of the pin 14 which project outwards.
• a spring clip 12 also has pivot openings 46 which can be plugged onto protruding ends of the pin 14 or onto the pivot pin 10.
• a further fastening possibility results from a spring clip 13, the pivot openings 46 of which are plugged onto the inwardly directed pivot pin 10.
• the advantage of the spring clips 11 to 13 shown in FIG. 10 is that the fastening pieces 5, 6 can only be inserted or hung in place during assembly.
• FIG. 9 A further simplification of the design of the head or foot switch 1 according to the invention is shown in FIG. 9.
• the locking joint 43 is shown there in the manner of an exploded drawing in the non-assembled state.
• a bore 44 is arranged in the toothed strut 29, into which a sleeve 40 is inserted, the ends 41 of which, in the assembled state, bear against the inner sides of the side struts 24 and 25 of the Y-beam.
• a connecting rivet 42 is inserted through the openings in these side struts 24, 25 and the sleeve 40 and, in the inserted state, is secured against lateral displacement.
• a particularly secure design of the locking joint 43 is obtained when the ends 41 of the sleeve 40 are compressed so that the latter is firmly connected to the toothed strut 29.

Landscapes

• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Nursing (AREA)
• Chairs For Special Purposes, Such As Reclining Chairs (AREA)
• Accommodation For Nursing Or Treatment Tables (AREA)
• Orthopedics, Nursing, And Contraception (AREA)
• Invalid Beds And Related Equipment (AREA)
• Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
• Ladders (AREA)
• Seats For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6327856

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (3)

Citations (4)

Family Cites Families (2)

• 1987
  • 1987-05-19 DE DE19873716714 patent/DE3716714A1/de active Granted
• 1988
  • 1988-05-11 ES ES198888107566T patent/ES2031951T3/es not_active Expired - Lifetime
  • 1988-05-11 WO PCT/EP1988/000410 patent/WO1988009139A1/de unknown
  • 1988-05-11 AT AT88107566T patent/ATE75116T1/de not_active IP Right Cessation
  • 1988-05-11 EP EP88107566A patent/EP0291840B1/de not_active Expired - Lifetime
  • 1988-05-18 DD DD88315873A patent/DD270003A5/de not_active IP Right Cessation

Patent Citations (4)

Also Published As

Similar Documents

Legal Events