MOTORIZED FUNCTIONAL FITTING FOR A BED FRAME OF A BOX SPRING BED OR A PLATFORM BED OR FOR A FRAMED SLATTED BASE

Description

[0001] The invention relates to a motorized functional fitting for a bed frame of a box spring bed or a platform bed or for a framed slatted frame with the features of the preamble of claim 1. The invention further relates to a head and back support unit for a box spring bed or for a platform bed as well as a box spring bed, a platform bed or a framed slatted frame.

[0002] A box spring bed comprises a bed frame with two side panels extending along the length of the bed, and a central panel extending between these side panels at the head and foot ends. A central panel extends in a lying plane between or above the side panels. A headboard is pivotally mounted at the head end of the central panel, which faces the head of the bed frame, about a pivot axis extending perpendicular to the length of the bed. A footboard is also pivotally mounted about a pivot axis, likewise extending perpendicular to the length of the bed. The central panel, the headboard, and the footboard together form a sleeping surface for a mattress.

[0003] Platform beds are beds that contain several platforms, which can be adjusted in their angle relative to each other and are designed to support at least one mattress. The mattress support can consist of one or more slatted frames. In box spring beds, the platforms supporting the mattress can each be designed as a solid panel.

[0004] A platform bed can comprise a bed frame with two side rails extending along the bed's longitudinal axis, as well as headboard and footboard sections extending transversely between them. A back support platform is provided on the side facing the head of the bed frame, pivoting about an axis extending transversely to the bed's longitudinal axis. A leg support platform is also often provided, pivoting about another axis extending transversely to the bed's longitudinal axis. Together, the pivoting platforms form a sleeping surface for a mattress. Optionally, a fixed central platform can be added between them.

[0005] A framed slatted base is basically constructed like the bed frame described above, but it is a self-contained unit with several adjustable platforms, which, with its rectangular frame, can be placed on any bed frame without requiring installations such as motor drive etc. on the bed frame.

[0006] The frame of the bed frame or slatted base consists of two side frames extending parallel to each other along the bed's longitudinal axis. These side frames are connected at the head and foot ends by a head frame section and a foot frame section, respectively, to form a usually rectangular, closed frame. This frame rests on a stand, legs, or similar support that raises the frame from the floor. The mattress can then be placed on the sleeping surface formed by the movable and fixed platforms.

[0007] A functional fitting is connected to the bed frame or slatted frame, in particular screwed on, in order to be able to raise and lower the head platform and the foot platform by motor.

[0008] The functional fitting comprises at least one longitudinal beam extending along a longitudinal axis of the support, which is designed for connection with the box spring bed, the bed frame or the slatted frame.

[0009] An erection frame is rotatably mounted to the longitudinal beam at a pivot point. A linear drive extending between the longitudinal beam and the erection frame converts the rotational movement of an electric motor into the translational movement of a lifting tube. The lifting tube is rotatably connected to the erection frame in such a way that the erection frame can be continuously moved from a lowered rest position (in a lying position) to an erect position. State of the art

[0010] The functional fitting is usually attached to the bed frame of the box spring bed and serves to transfer the headboard and footboard from the lowered resting position, in which they extend in a plane with the horizontal lying surface, to an upright position raised from this lying surface.

[0011] The bed frame of a box spring bed consists of two parallel side panels extending along the bed's longitudinal axis. These side panels are connected at the head and foot ends by a headboard and footboard section, respectively, forming a typically rectangular, closed frame. This frame is either placed directly on the floor or supported by drawers, a stand, feet, or similar structures that raise it from the floor. The box spring mattress can then be placed on the sleeping surface formed by the middle panel, the headboard, and the footboard.

[0012] The functional fitting is connected to the bed frame, in particular screwed on, in order to move the headboard and footboard by motor.

[0013] The longitudinal beam extends from the headboard section to the footboard section, and is thus attached to the bed frame at both its upper and lower ends. The longitudinal beam also centrally accommodates a double drive unit, whose electrically actuated linear elements operate a lifting mechanism for pivoting the headboard and a lifting mechanism for pivoting the footboard. In the prior art, the linear drives are designed as double drives, which are centrally located on the longitudinal beam. Each double drive unit is attached to the longitudinal beam at one rear end and is articulated to the headboard lifting mechanism and the footboard lifting mechanism by means of a linear element that is longitudinally adjustable relative to a stationary outer tube.In the prior art, the longitudinal beam thus extends essentially along the entire longitudinal axis of the bed, is therefore as long as the length of the bed frame and absorbs the main forces from the erecting frames and the linear drives.

[0014] Consequently, the longitudinal beam must be designed to be sufficiently stable in order to withstand these forces, which is preferably achieved by designing the longitudinal beam as a rectangular or square profile, which has a particularly good equatorial area moment of inertia against bending stress.

[0015] A functional fitting for a box spring bed is known, for example, from DE 10 2016 116 256 A1. The longitudinal beam disclosed in this document is designed as a continuous profile rail extending from the head end to the foot end of the bed frame. The lifting mechanisms, sometimes also referred to as lifting levers, are rotatably hinged at their rear end to the longitudinal beam and can be pivoted relative to the longitudinal beam by means of the central double drive from the lowered rest position, extending horizontally, to the raised position, i.e., forming an angle with the longitudinal axis of the longitudinal beam. Typically, the lifting position can be adjusted within a range between 0° and approximately 45° with respect to the longitudinal axis of the beam.

[0016] These functional fittings have the disadvantage that the length of the bed determines the length of the longitudinal beam and its profile rail. This means that different profile rails or different functional fittings with different longitudinal beams must be kept in stock for each bed length and each bed variant. This results in a considerable number of variants because there are currently no standards for box spring beds. This significantly increases storage costs.

[0017] Transporting the functional fittings is also problematic because they are typically significantly longer than standard pallet dimensions, which are usually 800 × 120 cm. Therefore, special dimensions must always be provided in storage areas, which is costly.

[0018] Another functional fitting is known, for example, from DE 20 2020 107 053 U1. It comprises at least one longitudinal beam extending along a longitudinal axis of the support, which is designed for connection to the bed frame. A lifting frame is rotatably hinged to the longitudinal beam at a pivot point. Finally, a linear drive extending and acting between the longitudinal beam and the lifting frame is provided, which converts a rotational movement of an electric motor into a translational movement of a lifting tube. The lifting tube is rotatably connected to the lifting frame in such a way that the lifting frame can be continuously moved from a lowered rest position (in a lying position) to an upright position. The disadvantage of using a bed equipped with such a functional fitting is that, in the upright position, the back support may be obstructed during seated activities such as sitting.When reading a book, a neck roll or similar support is still necessary to support the head, which must be tilted further forward than the back during these activities. The known functional fitting does not have a head section that can be adjusted separately from the back support. Task

[0019] Therefore, the invention is based on the objective / technical problem of at least partially avoiding the disadvantages that occur with generic functional fittings and, in particular, providing a particularly variable, easily transportable, but at the same time very stable motorized functional fitting.

[0020] In particular, the invention is based on the objective of providing a motorized functional fitting that enables an ergonomic head position in the upright position of the back support and that is suitable for all possible box spring beds, platform beds or framed slatted frames, especially also for those which are provided with several slatted frame elements as a mattress support. invention

[0021] This problem is already solved by a motorized functional fitting with the features of claim 1. Preferred, but not essential, features are set out in the subordinate dependent claims.

[0022] A fundamental aspect of the invention is based on a longitudinal beam for each adjustable unit at the head or foot end, which can be mounted in the center of the bed frame. To still achieve broad support for the head, back, leg, and foot sections, a symmetrical, V- or Y-shaped support frame is provided. This frame is hinged to the longitudinal beam at its narrow end and extends outwards on both sides into two upper arms that splay outwards. The connection to the head, back, leg, and foot sections is made via these upper arms. Due to the functional fitting, which is mirror-symmetrical and extends from the central axis of the bed frame, it is not necessary to make connections of the functional fitting near or even directly to the side frame members. Thus, the same functional fitting can be used with bed frames of varying widths.

[0023] A further advantage of the invention lies in the fact that, despite the arrangement of the functional fitting and drive unit concentrated in the center of the bed frame, it provides a headrest and a backrest that can be raised in a defined sequence of movements using only one drive unit. At the end of the raising movement, it is desirable that the headrest be inclined more steeply relative to the lying surface than the backrest.

[0024] For this purpose, it is provided that two headrest bearing elements are provided for the headrest or the headrest platform, each of which is connected to the two upper arms of the erection frame via a steering lever.

[0025] Regarding the control of the back support of the functional fitting for a box spring bed, the invention provides two advantageous embodiments.

[0026] According to a first embodiment, which is available for both box spring beds and platform beds or slatted frames, a synchronous lifting movement is achieved. Upon activation of the drive, not only the backrest but also the headrest is raised. The greater the angle of the backrest's upward movement, the more the angle of the headrest also increases disproportionately. To achieve this movement, an additional control lever is articulated to each of the upper arms of the lifting frame. This lever is connected to a backrest support bearing element designed for attachment to the backrest. The additional control levers are attached to the lifting frame with their coupling joints approximately midway between the control levers for the headrest at the ends of the upper arms and the crossbar.

[0027] In a second embodiment, particularly suitable for a box spring bed, a pre-movement of the headrest is achieved. Initially, only the headrest is raised until the desired relative angle between the head and backrests is reached, before the backrest is also raised, maintaining this relative angle. As in the first embodiment, the end-mounted levers serve to raise the headrest. However, there is no direct coupling with the backrest. To raise the backrest, one or more rollers are provided on the lifting frame. Their diameter and position are selected so that they only contact the back of the backrest after the desired relative angle between the head and backrests has been established. The lifting frame then pushes the backrest upwards via the rollers, maintaining the angle between the headrest and backrest.

[0028] The longitudinal beam of the functional fitting preferably comprises an outer end end (when installed) designed for attachment to the headboard or footboard section. Furthermore, the longitudinal beam preferably comprises an inner end end opposite the outer end end (when installed within the bed frame) designed for attachment to a center plate or platform. The drive unit can also be arranged laterally next to the longitudinal beam, i.e., attached to it, and the lifting frame can be rotatably hinged to the longitudinal beam at a lower mounting end (when installed). This means that the lifting frame can be rotatably pivoted to the longitudinal beam at its outermost end to maximize the lever arm.Finally, the relatively movable lifting tube of the linear actuator can be rotatably attached to the erection frame at a pivoting end spaced along a longitudinal axis of the erection frame from this mounting end. This design results in a particularly efficient force transmission of the lifting tube to the erection frame with a particularly long lever arm, so that linear actuators with approximately one-third less power can be used compared to existing functional fittings of this type.

[0029] According to the invention, the longitudinal beam can be designed to be attached to the bed frame either directly or indirectly at the head or foot end with the outer end in the installed position, which is directed towards the bed frame, and at an opposite end can be designed for attachment to the middle part or the middle platform.

[0030] The linear motor, which is preferably rotatably articulated with its lower motor end to the outer end face in the installed position, and the erection frame, which is rotatably oriented with its lower mounting end to the inner end face, preferably form an approximately isosceles triangle together with the longitudinal beam in the lifting position, although this is not essential for the mode of operation according to the invention.

[0031] Preferably, the pivotable linkage is achieved via clevises, which are arranged in particular on the linear motor at the rear end of the motor and the front lifting tube, or via profiles that rotatably engage an axis arranged in the longitudinal beam.

[0032] According to the invention, the functional fitting can be constructed such that the lower motor end of the linear drive is aligned in the installation position to the outer end face of the longitudinal beam and the lower mounting end of the erecting frame is rotatably articulated to the inner end face of the functional fitting.

[0033] The lifting tube of the linear drive, which is preferably mounted in the housing of the linear drive in a relatively movable manner, can be pivotally articulated as far as possible at the upper end of the erection frame, so that a particularly efficient force development of the toggle lever thus formed is realized, but at the same time the functional fitting is very flat in the lowered rest position.

[0034] In a bed with a separately movable head and back support or head and back support platform or leg and foot support, a split longitudinal beam is provided, which is screwed to the bed frame with its end end facing the head or foot of the bed frame on the outside in the installed position and is attached to the middle plate or middle platform with one end end facing the middle plate or middle platform.

[0035] Preferably, this attachment to the center plate or platform is achieved by means of angle profiles mounted laterally to the longitudinal beam. These profiles are attached to the longitudinal beam laterally by means of a vertical leg extending in the installed position, and are screwed to the underside of the center plate or platform by means of a horizontal leg extending at a right angle to this vertical leg. These angle profiles, preferably made of sheet steel, simultaneously provide stabilization to the center plate or platform to prevent deflection when a person sits on it.

[0036] Particularly smooth power delivery, and thus particularly low power consumption from the linear actuator's electric motor, is required when the rear end of the linear actuator is mounted at the outer end of the longitudinal beam and the mounting end of the erection frame is mounted at the inner end of the longitudinal beam, especially when pivotally connected. The electric motor's maximum power is needed to raise the erection frame from its lowered rest position, as the vertical lifting force is lowest at this point. Once these first 10 to 15 percent of the adjustment range have been overcome, the electric motor is subjected to only minimal load.

[0037] To minimize the power consumption of the linear drive, it is advantageous if the end of the linear drive, including the housing and the electric motor, is pivotably mounted as low as possible on the longitudinal beam.

[0038] Therefore, an additional retaining block can be provided, which is attached to the inside of a headboard and footboard section extending vertically in the installed position, to which the rear end of the linear drive can be attached or is attached. This retaining block is sometimes also referred to as a mounting beam, mounting block, crossbeam, or cross member, which is arranged transversely to the longitudinal axis of the bed, preferably on the inside of the headboard or footboard section, extending between the frame side sections at its lower ends and terminating with the lower edge of the frame side section, and forms a support edge offset inwards from the bed frame, to which the end faces of the functional fitting can be attached.

[0039] Preferably, an angle profile is rotatably attached to the rear end via a rear clevis head, which can be placed on this mounting beam or mounting block and screwed to it.

[0040] Preferably, such mounting beams or blocks are provided on both the head and foot sides to achieve the lowest possible point of force application for the rear mounting end of the linear drive, particularly the rear clevis. Further optimization of the force distribution is achieved by positioning the front end of the linear drive, especially the front end of the relatively movable lifting tube, as high as possible on the erection frame, i.e., at a point as far as possible from the lower mounting end of the erection frame on the longitudinal beam. This design of the functional fitting allows for the highest possible pitch of the linear drive even in the lowered rest position, thus requiring less power from the linear drive's electric motor compared to the prior art.

[0041] In the particularly preferred embodiment, the front end of the linear drive, especially the relatively movable lifting tube, engages a crossbeam extending between two fork-shaped profile sections or profile beams of the erection frame. This allows for a particularly low pivot point for the rear end of the linear motor, resulting in a relatively flat bed or bed frame design of approximately 7-11 mm. This allows drawers or substructures to be easily arranged beneath the actual bed frame without significantly increasing the overall system height.

[0042] An advantageous embodiment of the invention, which claims protection in itself, comprises a separate head and back support unit for a bed frame of a box spring bed or for a bed frame of a platform bed.

[0043] According to the invention, the longitudinal beam with the linear drive and the lifting linkage constitutes a self-contained functional assembly that can be attached to a bed frame or a mounted bed frame with a seat. This makes the functional fitting according to the invention significantly easier to transport, package, and handle for both skilled workers and end users compared to the prior art.

[0044] In addition, the invention also comprises a piece of furniture in the form of a box spring bed, comprising at least a bed frame with two side frames extending along a longitudinal axis of the bed, as well as a head frame section and a foot frame section extending transversely across the width of the bed at the head and foot ends, a central panel extending in a lying plane between the side frames, a back support pivotably connected thereto, and a head support pivotably connected to the back support. According to the invention, this box spring bed has one of the two head and back support units described above, by which controlled movement of the head support and the back support is achieved when adjusted by only one linear motor.

[0045] Preferred embodiments include a bed frame that also comprises a leg and foot support unit, which is divided into a thigh support and a foot and lower leg support, which are pivotally connected to each other about a further pivot axis. To allow relative movement of the thigh support and the foot and lower leg support relative to each other during adjustment, the lifting frame for the foot and leg support unit is preferably screwed to the foot and lower leg support by means of angle brackets.

[0046] For both box spring beds and platform beds, it may be necessary to provide two headrest bearing elements in the functional fitting for the headrest or headrest platform, each connected to the arms of the lifting frame via a control lever, so that the headrest or headrest platform is inclined more towards the lying surface than the backrest at the end of the lifting movement.

[0047] Regarding the control of the backrest or backrest platform and the headrest or headrest platform, the functional fitting of the invention provides that a common drive achieves a synchronous uprighting movement of both supports. Upon activation of the drive, not only the backrest or backrest platform but also the headrest or headrest platform are raised. The greater the uprighting angle of the backrest or backrest platform, the more the uprighting angle of the headrest or headrest platform increases disproportionately.

[0048] Two basic functional principles can be implemented alternatively: In a first embodiment, both the back support or back support platform and the head support or head support platform are articulated via a pair of linkage levers, which are connected to the arms of the shared lifting frame. The desired movement can be controlled with particular precision by positioning the coupling joints of the linkage levers on the arms and coordinating the lengths of the two pairs of linkage levers. The back support or back support platform and the head support or head support platform are each directly supported on the lifting frame.

[0049] In a second embodiment, only the headrest or headrest platform is articulated to the upright frame via a pair of linkage levers. The backrest or backrest platform is coupled between a backrest joint formed on the frame and a headrest joint formed between the backrest or backrest platform and the headrest or headrest platform. There are therefore no degrees of freedom, so the backrest or backrest platform follows the movement imposed on it by the articulation of the headrest or headrest platform. In this embodiment, due to the lack of direct support on the upright frame, stronger tensile forces are exerted on the backrest joint and the headrest joint than in the first embodiment.An advantage is that the lifting frame can be positioned closer to the back of the back and headrests / platforms in the resting position, as there is no second pair of levers. Therefore, this design is particularly suitable for lighter mattresses and / or flatter units, such as slatted bed bases that are fully enclosed in a frame.

[0050] Especially when used in a platform bed, the functional fitting can have a longitudinal beam that can be mounted between a crossbeam in the middle of the frame and in the headboard area. Viewed from the side, it is positioned approximately midway between the frame side panels. To still achieve broad support for the head, back, and leg / foot supports, a symmetrical, V- or Y-shaped support frame is provided. This frame is hinged to the longitudinal beam at its narrow end and divides into two arms that splay outwards. These arms connect to the head, back, and leg / foot supports. Because the functional fitting is mirror-symmetrical and designed radiating from the central axis of the bed frame, it is not necessary to make connections to the functional fitting near or directly with the side frame panels.This means that the same functional fitting can be used with several bed frames of different widths.

[0051] The linear motor, which is preferably rotatable with its lower motor end attached to the outer end face in the installed position, and the erection frame, which is preferably rotatable with its lower mounting end aligned to the inner end face, thus form, together with the longitudinal beam, preferably an approximately isosceles triangle in the lifting position, although this is not essential for the operation according to the invention.

[0052] Preferably, the pivotable linkage is achieved via clevises, which are arranged in particular on the linear motor at the rear end of the motor and the front lifting tube, or via profiles that rotatably engage an axis arranged in the longitudinal beam.

[0053] According to the invention, the functional fitting can therefore be constructed in such a way that the lower motor end of the linear drive is aligned in the installation position to the outer end face of the longitudinal beam and the lower mounting end of the erecting frame is rotatably articulated to the inner end face of the functional fitting.

[0054] The lifting tube of the linear drive, which is preferably mounted in the housing of the linear drive in a relatively movable manner, can be pivotally mounted as far as possible at the upper end of the erection frame, so that a particularly efficient force development is achieved, but at the same time the functional fitting has a very flat profile in the lowered rest position.

[0055] A bed with a separately movable head and back support platform or head and back support or leg and foot support is therefore a split longitudinal beam which, with its end end facing the head or foot of the bed frame on the outside in the installed position, is screwed to the bed frame and with one end end facing the middle platform or middle plate, is attached to this middle platform or middle plate.

[0056] Preferably, this attachment to the central platform or plate is achieved by means of angle profiles mounted laterally to the longitudinal beam. These profiles are attached to the longitudinal beam laterally by a vertical leg extending in the installed position and are screwed to the underside of the central platform or plate by a horizontal leg extending at a right angle to this vertical leg. These angle profiles, preferably made of sheet steel, simultaneously provide stabilization to the central platform or plate to prevent deflection when a person sits on it.

[0057] Particularly smooth power delivery, and thus particularly low power consumption from the linear actuator's electric motor, is required when the rear end of the linear actuator is mounted at the outer end of the longitudinal beam and the mounting end of the erection frame is mounted at the inner end of the longitudinal beam, especially when pivotally connected. The electric motor's maximum power is needed to raise the erection frame from its lowered rest position, as the vertical lifting force is lowest at this point. Once these first 10 to 15 percent of the adjustment range have been overcome, the electric motor is subjected to only minimal load.

[0058] To minimize the power consumption of the linear drive, it is advantageous if the end of the linear drive, including the housing and the electric motor, is pivotably mounted as low as possible on the longitudinal beam.

[0059] Therefore, an additional retaining block can be provided on the inside of the headboard and footboard, which extend vertically in the installed position, to which the rear end of the linear drive can be attached or is attached. This retaining block is sometimes also referred to as a mounting beam, mounting block, crossbeam, or cross member, which is arranged transversely to the longitudinal axis of the bed, preferably on the inside of the headboard or footboard, terminating at its lower ends, extending between the frame side members with the lower edge of the frame side member and forming a support edge offset inwards from the bed frame, to which the end faces of the functional fitting can be attached.

[0060] Preferably, an angle profile is rotatably attached to the rear end via a rear clevis head, which can be placed on this mounting beam or mounting block and screwed to it.

[0061] Preferably, such mounting beams or blocks are provided on both the head and foot sides to achieve the lowest possible point of force application for the rear mounting end of the linear drive, particularly the rear clevis. Further optimization of the force distribution is achieved by positioning the front end of the linear drive, especially the front end of the relatively movable lifting tube, as high as possible on the erection frame, i.e., at a point as far as possible from the lower mounting end of the erection frame on the longitudinal beam. This design of the functional fitting allows for the highest possible pitch of the linear drive even in the lowered rest position, thus requiring less power from the linear drive's electric motor compared to the prior art.

[0062] In the particularly preferred embodiment, the front end of the linear drive, especially the relatively movable lifting tube, engages a crossbeam extending between two fork-shaped profile sections or profile beams of the erection frame. This allows for a particularly low pivot point for the rear end of the linear motor, resulting in a relatively flat bed or bed frame design of approximately 7-11 mm. This allows drawers or substructures to be easily arranged beneath the actual bed frame without significantly increasing the overall system height.

[0063] According to the invention, the longitudinal beam with the linear drive and the lifting linkage constitutes a separate functional assembly that can be attached to the base frame or a mounted bed frame with a seat platform. This makes the functional fitting according to the invention significantly easier to transport, package, and handle for both skilled workers and end users compared to the prior art.

[0064] A functional head and back support unit that can be installed as a single unit in a platform bed frame can be created by supplementing the functional fitting with a back support platform that can be articulated to the frame via a back support joint, on which a back support bearing element for the back support steering lever is attached, and a head support platform that is articulated to the back support platform via a head support joint, on which the head support bearing element for the head support steering lever is attached.

[0065] An advantageous embodiment of the head and back support unit provides that the head support platform has at least two parallel head support side frame elements and a head support beam connecting them, to which the head support bearing elements for the head support steering levers are attached. Simultaneously, the back support platform comprises at least two parallel back support side frame elements and at least one connecting back support beam, to which the back support bearing elements for the back support steering levers are attached. The beams are stiffening crossbeams within the pivoting platforms. The resilient slats of the slatted frame intended for the mattress can thus be flexibly or floatingly mounted on the respective side frame elements, since they do not have to absorb any lateral forces.

[0066] The greater inclination of the headrest relative to the backrest is achieved in the head and backrest unit in particular by the fact that the headrest steering lever is longer than the backrest steering lever and that, in the lowered rest state of the upright frame, the longitudinally measured distance x S between the coupling joints on the headrest platform and on the backrest platform is smaller than the distance x A between the coupling joints on the upper arms of the upright frame.

[0067] In addition, the invention also comprises a bed in the form of a platform bed, comprising at least a bed frame with two parallel frame side members extending along a longitudinal axis of the bed, as well as a head frame member and a foot frame member extending transversely across the width of the bed at a head and a foot end. According to the invention, this platform bed has one of the two previously described head and back support units, by which controlled movement of the head support platform and the back support platform is achieved when adjusted by only one linear motor.

[0068] Particularly preferred is an additional central platform extending in a lying plane between the frame side parts, wherein the back support platform is connected to the central platform via a back support joint.

[0069] It is also possible that the frame has at least one crossbeam extending between the frame side parts and that the back support platform is connected to the crossbeam via a back support joint.

[0070] A functional head and back support unit for a slatted frame is created by supplementing the functional fitting with a back support platform that can be articulated to the frame via a back support joint, and with a head support platform that is articulated to the back support platform via a head support joint, on which the head support bearing elements for the head support steering levers are attached.

[0071] By including such a head and back support unit and a frame comprising two parallel frame side parts and the connecting head and foot frame parts, a ready-to-use slatted frame can be created that only needs to be placed on a bed frame.

[0072] The frame can also include a central platform extending in a lying plane between the frame's side panels, which has slats that are fixed to the frame and therefore not pivotable. The central platform provides a central support for a mattress, which is partially raised by the head and back support unit and any motorized leg and foot support unit that may also be present. The area of ​​the central platform thus forms a pivot point for the mattress.

[0073] In preferred designs, the bed frame or slatted base also includes a leg and foot support unit, which is divided into a thigh support platform and a foot and lower leg support platform, which are connected to each other in a pivotable manner about a further pivot axis.

[0074] Further features and advantages of the present invention will become clear with reference to the following description of preferred embodiments in the figures below, with reference to the accompanying illustrations. Directional terminology such as "top," "bottom," "front," "back," "anterior," "rear," etc., is used in reference to the orientation in the described figures. Since components of embodiments can be positioned in a number of different orientations, the directional terminology serves for illustration and is in no way limiting. It is understood that other embodiments can be used and structural or logical modifications can be made without deviating from the scope of protection of the present invention. The following detailed description is not to be understood as limiting.

[0075] Within the scope of this description, the terms "connected", "attached" and "integrated" are used to describe both a direct and an indirect connection, a direct or indirect connection, and a direct or indirect integration.

[0076] In the figures, identical or similar elements are designated with identical reference numerals, where appropriate. The representations in the figures are essentially to scale. However, to illustrate details, certain areas may be shown to be unrealistically large, which would be apparent to a person skilled in the art. Furthermore, the drawings may be simplified for illustrative purposes and do not necessarily include every detail that may be present in the practical embodiment.

[0077] Unless otherwise specified, the indefinite and definite articles do not refer to a single component but are to be understood as "at least one". The terminology includes the aforementioned words, variations thereof, and similar meanings. Furthermore, it is understandable to those skilled in the art that the terms "approximately", "essentially", and "similar" in conjunction with the dimensions and a property of a component of the invention do not describe the described dimension and property as strict limits and / or parameters, nor do they exclude minor variations thereof that are functionally similar. At a minimum, descriptive parts with numerical parameters also include variations of these parameters according to the mathematical and manufacturing principles in the prior art, for example, rounding, deviations and other systematic errors, manufacturing tolerances, etc.

[0078] Finally, for the sake of clarity, only one of the identical components or elements is marked with a reference symbol.

[0079] All features of the embodiments described below are also disclosed generally within the scope of the invention, independently of one another. They show: Figure 1 is an isometric view of a bed frame with a head and back support unit according to a first embodiment in the rest position and a foot and leg support unit in the upright position; Figure 2 is an enlarged view of the headboard area. Figure 1 Figure 3 shows a side view of the bed frame with the head and back support unit in rest position according to Figure 1 and 2Figure 4: A side sectional view of the bed frame in an intermediate position; Figure 5: A schematic functional view of the linkage formed by the functional fitting at the head end; Figure 6: A detail of the head and back support unit in an isometric view; Figure 7: A detail of the lifting mechanism of the head and back support unit in an isometric view; Figure 8: A side sectional view of the bed frame in the upright position; Figure 9: The head and back support unit in the upright position in an enlarged isometric view of the headboard area; Figure 10: An isometric view of a bed frame with a head and back support unit according to a second embodiment in the rest position and a foot and leg support unit in the upright position; Figure 11: A side sectional view of the bed frame with the head and back support unit in the rest position according to Figure 10Figure 12: A side sectional view of the bed frame with the head and back support unit in a first intermediate position; Figure 13: A side sectional view of the bed frame with the head and back support unit in a second intermediate position; Figure 14: A side sectional view of the bed frame with the head and back support unit in an upright position. Figure 15: An isometric view of a bed frame with a head and back support unit with a functional fitting according to a first embodiment, as well as a foot and leg support unit; Figure 16: Sections of an isometric view of the rear of the bed frame. Figure 1Figure 17: A schematic functional view of the linkage formed by the functional fitting at the head end; Figure 18: A detail of the head and back support unit in an isometric view; Figure 19: A detail of the lifting frame of the head and back support unit in an isometric view; Figure 20: Sections of an isometric view of the rear of a framed slatted frame with a second embodiment of a functional fitting; Figure 21: Parts of the framed slatted frame according to Figure 20 in an isometric view from an oblique front view; Figure 22 the framed slatted frame according to Figure 20 in resting position in a side view; Figure 23 the framed slatted frame according to Figure 20 in resting position in view from below and Figure 24 a detail enlargement of the representation in Figure 16.

[0080] Figure 1Figure 1 shows a bed frame 100 for a reclining furniture, as a box spring bed, which is provided with a first embodiment of a functional fitting 10 designed according to the invention for a head and foot support unit.

[0081] The bed frame 100 comprises two functional fittings 10, 70 arranged flush on a central longitudinal axis of a bed frame 50, which are mounted within the bed frame 50. The bed frame 50 comprises two frame side parts 51, 52 extending parallel to each other, as well as a head frame part 51 connecting the frame side parts 51, 52 at one head end and a foot frame part 53 at the foot end, thus forming a fully enclosed, rectangular bed frame 50.

[0082] A central panel 55 is attached to the top of the bed frame 50, approximately in the middle, extending transversely between the frame side panels 51, 52. The top of the central panel 55 defines a lying surface of the bed frame 100. A back support joint 31 is formed on the central panel 55 via two hinges spaced apart from each other and arranged at the edges, through which a back support 32 of a head and back support unit 30 is connected to the central panel 55.

[0083] On the other side of the central plate 55, facing towards the foot end, two spaced-apart hinges form a leg support base joint 61, via which a foot and leg support unit 60 is pivotably attached to the central plate 55. The central plate 55, the head and back support unit 30, and the foot and leg support unit 60 are shown partially transparent in this and the following figures, but in practice they are designed as wooden panels on which, for example, a mattress section rests.

[0084] The head and back support unit 30 and the foot and leg support unit 60 each contain support plates that are divided into two parts for even more comfortable adaptation to the human anatomy.

[0085] The head and back support unit 30 is divided into a back support 32, which is connected to the central plate 55 via the back support joint 31, and a shorter head support 34, which is arranged away from the central plate 55 and is connected to the back support 32 via a head support joint 33.

[0086] The foot and leg support unit 60 is divided into a short thigh support plate 62, which faces the central plate 55 and is connected to it via the leg support base joint 61, and a longer foot and lower leg support 64, which is arranged away from the central plate 55. The thigh support 62 and the foot and lower leg support 64 are pivotally connected to each other via a foot and lower leg support joint 63.

[0087] In Figure 1The head and back support unit 30 is in a rest position in which the back support 32 and the associated head support 34 are fully lowered. In this rest position, the back support 32 and the head support 34 extend parallel to the central plate 55 and, together with the central plate 55, define a lying surface. The foot and leg support unit 60, on the other hand, is in a position raised and angled above the lying surface in Figure 1.

[0088] Each functional fitting 10, 70 comprises a longitudinal beam 11, 71 designed as a rectangular steel profile, which is predominantly made of painted steel and extends centrally under the bed frame 50 along the longitudinal axis of the bed. The longitudinal beam 11 is connected to the head frame section 51 via a mounting bracket 11.1. The longitudinal beam 71 is attached to a crossbeam located behind the foot frame section 53. At the respective inner end faces of the longitudinal beams 11, 71, angle profiles 11.1 extending transversely to the longitudinal axis are attached to both sides, their inner legs being laterally attached to the longitudinal beams 11, 71. They have horizontal mounting legs that extend transversely to the longitudinal axis of the longitudinal beams 11, 71 and can be screwed to the underside of the center plate 55 in the installed position, thus securing the functional fittings 10, 70 on the inside via an angle profile 11.2 to connect to the bed frame 50 and simultaneously secure the center plate 55 against deflection in the middle, for which purpose the angle profiles 11.1 are preferably designed as steel profiles. For reasons of stability, the functional fittings 10, 70 are constructed from angled or drawn steel profiles.

[0089] At the outer end of the functional fittings 10, 70, a motor base bearing 22 is arranged, on which the respective rear end of a linear drive 21, 75 is pivotably mounted. The linear drives 21, 75 each comprise a lifting tube whose length can be varied by an electric motor drive. The motor base bearing 22 is arranged as close as possible to the outer and lower end of the longitudinal beam 20, so that the angle at which the linear drive acts on the upright frame 12 is as large as possible and the force required for the uprighting movement of the head and back support unit 30 is reduced by lengthening the effective lever arm.

[0090] Each erection frame 12, 72 is formed by two interconnected arms, each having a lower attachment end for lateral pivoting to the respective longitudinal beam 11, 71, thus enclosing it on both sides with an intermediate axis, and extending longitudinally from this lower attachment end parallel to each other on both sides of the longitudinal beam 11, 71, initially transitioning in a widened section in which the distance to the profile angles increases, and at their free upper end transitioning again into end sections extending parallel to each other, which are referred to as upper arms 13.

[0091] The design and function of the two functional fittings 10, 70 for the head and foot ends are largely identical with regard to the features described so far. Both functional fittings 10, 70 are designed to not only raise the two separate and articulated support plates 32, 34, 62, 64 with a single motorized linear drive, but also to bring them into a position in which the back support 32 and the head support 34, or the thigh support 62 and the foot and lower leg support 64, are aligned at a specific angle to each other, thus enabling a comfortable posture for the person lying on the bed.

[0092] Since the functional fittings 10, 70 are each designed symmetrically with respect to the longitudinal beams 11, 71, and the forces on the supports 32, 34, 62, 64 can be effectively absorbed by the wide uprights 12, 72, stable support is achieved without requiring any parts of the functional fittings to be located directly on the frame side panels 52, 54. Instead, sufficient free space remains between the uprights 12, 72 and the frame side panels 52, 54, allowing narrower or wider bed frames to be equipped with the same functional fittings. For moving and transport, the bed frame 50 can be disassembled in the usual manner. The removed functional fitting 10, 70 with longitudinal beams 11, 71 then has small dimensions in width and length and a shallow depth, making it easy to store.

[0093] The design and function of the respective lifting frame 12, 72 differ between the head and back support unit 30 on the one hand and the foot and leg support unit 60 on the other. If the lifting angle of the back support 32 and the thigh support 62 is defined as positive relative to the central plate 55 and is related to the lying surface defined by the central plate 55, then, at least in the final position of the upright posture, the head support 34 should assume a positive angle relative to the back support 32; that is, the head support 34 should be inclined more than the back support. Conversely, in the upright posture of the foot and leg support unit 60, a negative angle, i.e., a lowered position, should be established between the thigh support 62 and the foot and lower leg support 64. This necessitates different designs of the functional fittings 10, 70.

[0094] The functional fitting 70 for the foot and leg support unit 60 is of simple design. The lifting frame 72 is connected at one end to the longitudinal beam 71 and at the other end to a mounting bracket on the underside of the foot and lower leg support 64. The linear drive 75, which is articulated at one end to a crossbar on the lifting frame 70 and at the other end to the longitudinal beam 71, causes the lifting frame 70 to be increasingly pivoted upwards and raised relative to the central plate 55 when the motorized linear drive 75 is actuated.

[0095] The joint 65 on the underside of the foot and lower leg support 64, viewed from the side, moves along a path determined by the constant length between the joints of the lifting frame 72 and the constant length between joints 61 and 63, as well as by the variable length of the lifting tube on the linear drive 75. This forced guidance not only raises the foot and lower leg support 64 but also moves it longitudinally along the bed frame 100 towards the central plate 55. The thigh support 62, coupled between them, is quickly moved into a steep position, not least due to its short length. Meanwhile, the foot and lower leg support 64 remains in a rest position approximately parallel to the lying surface during the movement into the upright position and lowers slightly towards the foot frame section 53 at the end of the movement.

[0096] The lifting frame 12 on the head and back support unit 30 is constructed similarly to the lifting frame 72 for the foot section with regard to a V-shaped base element, also referred to as a "swing", which comprises the two upper arms 13 and a connecting traverse 14 to which the linear drive 21 is articulated.

[0097] For the headrest 34, it should be ensured that it never assumes a negative angle relative to the backrest 32 in any phase of the movement of the head and backrest unit 30, i.e., that it does not tilt backwards. Rather, the headrest 34 should be inclined more towards the center of the bed frame 100 than the backrest 32 to which it is connected, at least in the final position of the upright position of the backrest 32.

[0098] For this purpose, the functional fitting 10 for the head and back support unit 30 is specially designed, as can be seen from the enlarged illustration of the head area in Figure 2will be explained.

[0099] As already described, the erection frame 12 is formed by two upper arms 13 connected to each other via a crossbeam 14. These upper arms 13 extend from lower arms, each of which has a lower attachment end for lateral connection to an erection frame base joint 15 on the longitudinal beam 11. The lower arms extend longitudinally from the erection frame base joint 15, initially parallel to each other and running close to the longitudinal beam 11 on both sides. Continuing longitudinally, they then transition into a widened section where the distance to the longitudinal beam 11 increases, and at their respective free ends, they transition again into parallel end sections that form the upper arms 13. The upper arms 13 are a significant distance from the side surfaces of the longitudinal beam 11. The widening of the upper arms 13 must result in such a lateral offset relative to the side surfaces of the longitudinal beam 11 that, in the Figure 1and 2 In the rest position shown, the linear drive 21 can be completely contained in the free space between the longitudinal beam 11 and the left upper arm 13 of the erection frame 12.

[0100] In the illustrated embodiment of a functional fitting 10, an additional back support steering lever 16 is provided on each of the upper arms 13. This lever is articulated both to the upper arm 13 and to a back support bearing element 18 on the underside of the back support 32. The steering levers 16 are attached to coupling joints 16.1, which are located on the upper arms 13 approximately midway between the base of the crossbar 14 and the end near the head frame section 51.

[0101] At the outermost end, headrest steering levers 17 are provided on both upper arms 13, which are connected on one side to a coupling joint 17.2 on the upper arm 13 and on the other side to a coupling joint 17.1 on a headrest bearing element 19.

[0102] In Figure 3 The bed frame 100 is shown in a side section view from the left, with the left side frame section 51 removed, and with the head and back support unit 30 and the foot and leg support unit 60 in the same position as in the Figure 1 and 2 depicted.

[0103] On the right is the erected foot and leg support unit 60. The linear drive 75 and the erection frame 72, together with the section of the longitudinal beam 71 located between them, form a triangle that determines the height of the foot and lower leg support 64. Its inclination is determined by the linkage chain formed by connecting the foot and lower leg support 64 to the central plate 55 via the lower leg support hinges 63, the thigh support 62, and the leg support base hinges 61.

[0104] Links in Figure 3The head and backrest unit 30 is still in its rest position. The motor base bearing 22 is located on the longitudinal beam 11 near the head frame section 51. The motor crossmember bearing 23 on the crossmember 14 is located approximately halfway between the top of the longitudinal beam 11 and the bottom of the backrest 32.

[0105] To ensure that the headrest 34 tilts increasingly more than the backrest 32 during the uprighting movement relative to the lying surface L, the functional fitting 10 is designed such that the headrest 34 rises synchronously with the backrest 32. Furthermore, fixed stops, described separately below, ensure that the headrest 34 never tilts backward relative to the backrest 32.

[0106] In particular, the functional fitting 10 achieves a movement in which the headrest 34 is raised synchronously with the entire uprighting movement of the backrest 32, and is additionally tilted towards the center of the bed relative to the backrest 32.

[0107] In Figure 4 The bed frame 100 is again shown in a side sectional view from the left, with the left side frame section 52 removed. By extending the lifting tube of the linear drive 21, the erection frame 12 is raised from the rest position according to Figure 3 It has been raised and now forms an acute angle with the lying surface L, with both steering levers 16, 17 inclined towards the center of the bed frame 100. The headrest 34 is no longer in the same plane as the backrest 32.

[0108] The kinematics in the head and back support unit 30 according to the invention is achieved through the special properties of the functional fitting 10.

[0109] To illustrate, show Fig. 5 one of Fig. 4 Abstracted view of the head and back support unit 30, taking into account that the abstracted model in Figure 5 only one functional plane is shown by one of the upper arms 13, while the actual functional fitting 10 has two parallel and identically formed functional planes due to the two upper arms 13 on the erection frame 12: In a region of the upper arm 13 extending between the crossbeam 14 and the free end of the upper arm 13, a linkage mechanism is formed with a total of five fixed elements, represented as rods, and seven parallel pivot axes, represented as circles. The rods in the linkage mechanism are formed by the uprighting frame 12, including the upper arms 13, the steering levers 16 and 17, the back support 32, and the head support 34. One fixed axis is formed by the back support joint 31 between the central plate 55 and the back support 32; another fixed axis is formed by the uprighting frame base joint 15. A movable axis is formed by the head support joint 33 between the back support 32 and the head support 34. Two of the movable axes are formed by coupling joints 16.2 and 17.2 for the steering levers 16 and 17, which are located on the upper arms 13. The distance between them is denoted as x A.The remaining two movable axes are formed at the connection of the coupling joints 16.1, 17.1, to which the bearing levers 16, 17 are each connected to bearing elements 18, 19 on the undersides of the back and headrests 32, 34. The headrest joint 33 is located longitudinally between them, but in a position that is higher relative to the upright frame 12 than that of the coupling joints 16.1, 17.1. The distance xS between the coupling joints 16.1, 17.1 in the longitudinal direction of the upper arm 13 is smaller than the distance xA. Furthermore, the end-side steering lever 17 on the headrest 34 is slightly longer than the steering lever 16 connected to the backrest 32. Functionally, the movement of the upper arms 13 of the uprighting frame 12 and the backrest 32 is determined only by a part of the linkage mechanism, which comprises a four-bar linkage with the rods 12, 16 and 32 as well as the joints 15, 16.1, 16.2 and 31.The aforementioned four-bar linkage is connected via the common joints 16.1 and 16.2 to another part of the linkage mechanism, which controls the movement of the headrest 34. This part also includes joints 17.1, 17.2, and 33.

[0110] Since the headrest 34 is connected to the backrest 32 via a total of five joints, an additional degree of freedom is provided, which allows the position of the headrest 34 relative to the backrest 32 to be indeterminate. To ensure that the headrest 34 moves relative to the backrest 32 only in such a way that it tilts towards the center of the bed but does not fall backward, the steering lever 17 is longer than the steering lever 16.

[0111] As further measures to tilt the headrest 34 from its resting position in the intended direction, i.e., towards the center plate 55, and to prevent it from tilting backwards and downwards, fixed stops are provided, which are shown in the isometric detail view in Figure 6visible on the part of the erection frame 12 located near the head frame section 51. In Figure 6 The head and back supports 32 and 34 are each in their fully lowered rest position. Fixed stops 17.4 in the form of welded-on round steel sections are attached to the two upper arms 13 of the lifting frame 12. The rear, lower edge of the steering lever 17 rests on these stops. A further fixed stop 17.3 is attached to each of the head support bearing elements 19, against which the steering lever 17 rests with its front, upper edge. The steering lever 16 has only one fixed stop 16.4, which is designed as a notch in the steering lever 16.

[0112] Figure 7 Figure 1 shows the support for the steering lever 16 in a further isometric detail view. The cutout for the fixed stop 16.4 extends laterally inwards by approximately ¾ of the sheet thickness of the steering lever 16, thus enabling a stable support on the upper edge of the upper arm 13.

[0113] Figure 8 is, as before, the Figures 3 and 4 also, a lateral sectional view through the bed frame 100 from the left, showing the upright position of the head and back support unit 30.

[0114] The lifting tube 24 of the linear drive 21 is now fully extended. The motor crossbeam bearing 23 rests against the rear of the back support 32, thus achieving the maximum possible end position of the back support 32. The back support 32 is at an angle of approximately 60° to the lying surface L. The head support 34 is even approximately perpendicular to the lying surface L. The steering lever 16 is fixed by a stop element 16.3 and / or an axis of the coupling joint 16.1 and / or another fixed stop resting on the upper edge of the arm 13.

[0115] Figure 9Figure 1 shows the upright position of the head and back support unit 30 in an enlarged isometric view of the head area of ​​the bed frame 100. The largely symmetrical design of the head and back support unit 30, with its central longitudinal beam 11 and V-shaped upright frame 12, is particularly evident in the upright position. The stability of the upright back support 32 against lateral twisting, which can occur, for example, when the back support is subjected to a very off-center load, is achieved by a stable force quadrilateral, indicated by the dotted line. This stability is primarily achieved by the upper arms 13, which extend laterally outwards and are articulated to the back support bearing elements 18.

[0116] The position of the back support bearing elements 18 in the transverse direction of the bed frame 100 is chosen such that they are located approximately 1 / 4 to 1 / 3 of the total width from the respective side edge of the back support 32. Furthermore, the arrangement of the hinges forming the back support joint 31 and the head support joint 33 is chosen to be close to the side edge of the bed frame 100.

[0117] Figure 10 Figure 1 shows a second embodiment of a bed frame 100' designed according to the invention for a piece of furniture, in particular for a box spring bed. This comprises two functional fittings 10', 70 arranged coaxially along the central longitudinal axis of a bed frame 50, which are mounted within the bed frame 50 for the box spring bed.

[0118] The design of the bed frame 50, comprising headboard section 51, footboard section 53, sideboard sections 52, 54, and center panel 55, the back support 32 connected to the center panel 55 via a back support joint 31, and the head support 34 connected to the latter via a head support joint 33, are identical to the first described embodiment. As in the first embodiment, both supports 32, 34 are of the same width. The back support 32 is again approximately two to three times longer than the head support 34.

[0119] Likewise, the leg and foot support unit 60 with the functional fitting 70 is identical in construction and function to the first embodiment.

[0120] In Figure 10 The leg and foot support unit 60 is in the fully raised upright position, while a head and back support unit 30' is fully lowered.

[0121] The design and function of the two functional fittings 10', 70 for the head and foot ends are largely identical with regard to the features described so far. Both functional fittings 10', 70 are designed to use only one motorized linear drive to not only raise the two separate and articulated support plates, but also to bring them into a position in which the back support 32 and the head support 34, or the thigh support 62 and the foot and lower leg support 64, are aligned at a specific angle to each other, thus enabling a comfortable posture for the person lying on the bed.

[0122] The head and back support unit 30' according to the second embodiment is based on the longitudinal beam 11, which is connected to the head frame part 51 and the middle plate 55 via angle profiles 11.1, 11.2.

[0123] The erection frame 12' is V-shaped. It is formed by two interconnected arms, each with a lower attachment end for lateral pivoting to the respective longitudinal beam 11, and which transition towards their ends into upper arms 13' that extend laterally from each other and from the longitudinal beam 11. They are connected via the crossbeam 14, which extends transversely across the longitudinal beam 11. The linear drive 21 is pivotally mounted on one side to a motor base bearing on the longitudinal beam 11 near the head frame section 51, and on the other side to a motor crossbeam bearing 23 on the crossbeam 14'. The linear motor 21 is housed in the space between the left upper arm 13' and the longitudinal beam 11.

[0124] The only, but important, difference in the head and back support unit 30' compared to the first embodiment is in the way in which the back support 32 is supported on the erection frame 12'. Figure 11The figure shows the bed frame 100' in a side section view through the bed frame 50, in which the left side frame part has been removed.

[0125] At the outermost end of the erection frame 12', a headrest steering lever 17 is provided on each of the upper arms 13', which is connected on one side to a coupling joint 17.1 on the upper arm 13 and on the other side to a coupling joint 17.2 on a headrest bearing element 19. The headrest 34 is supported above this.

[0126] Each upper arm 13' is also equipped with a pair of rollers 20', the axis of rotation of which runs just above the upper arms 13'. In the rest position with the head and back support unit 30' lowered, the rollers 20' have no contact with the back support 32. The back support 32 is held only by the joint axes 31, 33.

[0127] The length of the steering lever 17 and the position of the rollers 20' are coordinated in such a way that at the beginning of the uprighting movement of the head and back support unit 30' a so-called leading movement of the head support 34 is enabled, i.e. the head support 34 is already tilted before the rollers 20' engage with the back support 32.

[0128] This is demonstrated when comparing the resting position in Figure 11 and a first intermediate position in Figure 12 clearly: Figure 12 The bed frame 100' is shown in the same side sectional view as before. The lifting movement has already been initiated. The raising frame 12' is in the opposite position to the one shown in the previous image. Figure 11The headrest 34 was slightly raised. Using the control levers 17, it was moved significantly out of the lying plane L. It now forms an angle of more than 30° to the lying plane L, while the backrest 32 remains within the lying plane L. The rollers 20' now make initial contact with the back of the backrest 32. The contact point of the rollers 20' lies – viewed in the longitudinal direction of the bed frame 50 – at the edge of the backrest 31 facing the head end. The angle α enclosed between the backrest 32 and the headrest 34 is approximately 150°.

[0129] A characteristic feature of the second embodiment of the functional fitting 10' for the head and back support unit 30' is that this angle between the supports 32, 34 is maintained after the previous advancement of the head support 34, or according to a special embodiment is essentially maintained and can differ in the range of 120° to 150°, while the back support 32 is raised further.

[0130] In Figure 12It is also evident that the motor base bearing 22 of the linear drive 21 is located as low as possible, i.e., on the underside or in the lower half of the profile height of the longitudinal beam 11. At the same time, the motor crossbeam bearing 23 is located on the crossbeam 14 directly behind the rear of the back support 32. This optimally utilizes the available space, providing an effective lever H between the erection frame base joint 15 and the extension of the force line of the lifting tube 24, through which an erecting torque is exerted on the erection frame 12'.The longitudinal distance between the upright frame base joint 15 and the motor crossbeam bearing 23 extends the effective lever arm H through the back support 32 beyond the lying surface L, while at the same time a space-saving arrangement of the entire functional fitting 10' including linear drive 21 within the given height of the bed frame 50 is possible.

[0131] Figure 13 Figure 1 shows the bed frame 100' in a second intermediate position, again in a similar side sectional view. As the lifting frame 12' is further raised, the rollers 20' push the back support 32 upwards, so that it is lifted out of the lying plane L. The angle α between the supports 32, 34 is always not maintained.

[0132] In the presentation in Figure 14The end position of the upright posture is almost reached. The back support 32 is now at an angle of 40° to 60° to the lying surface L. The angle α between the back support 32 and the head support 34 is still approximately 150°. The contact point of the rollers 20' with the back of the back support 32 has now shifted significantly towards the center of the back support 32 in the longitudinal direction. If the lifting tube 24 of the linear drive 21 can extend further, the upright posture can be completed from the position after Figure 13 It will be enlarged a little more, until the traverse 14 touches the back support 32 from behind.

[0133] Figure 15 Figure 1 shows a bed frame 200 for a reclining furniture as a platform bed, which is provided with a first embodiment of a functional fitting 210 designed according to the invention for a head and back support unit 230 and also includes a functional fitting 270 for a foot and leg support unit 260.

[0134] The functional fittings 210, 270 are mounted on the bed frame 200 within a bed frame 250. The bed frame 250 comprises two parallel, longitudinally extending frame side members 251, of which only one is shown here, as well as a head frame member 253 connecting the frame side members 251 at one head end and a foot frame member 254 at one foot end, thus forming a fully enclosed, rectangular frame 250 of the bed frame 200. Crossbeams 257, 258 extend between the frame side members 251 in a central section of the length.

[0135] Each of the frame side parts 251 has a bearing for a back support joint 240, via which a back support platform 232 of the head and back support unit 230 is connected to the frame 250. On the other side, facing the foot end, a leg support base joint 261 is formed, via which a foot and leg support unit 260 is pivotably attached to the frame 250.

[0136] Also visible in a central area along the length of the frame 250 is a support for a middle level 255. The middle level 255 comprises slats that are stationary on the frame 250 and are therefore neither part of the head and back support unit 230 nor of the foot and leg support unit 260.

[0137] The head and back support unit 230 and the foot and leg support unit 260 each contain two independently movable support platforms to allow for comfortable adaptation to the human anatomy.

[0138] The head and back support unit 230 is divided into a back support platform 232, which is connected to the frame 250 via the back support joint 240, and a shorter head support platform 234, which is connected to the back support platform 232 via a head support joint 233.

[0139] The foot and leg support unit 260 is itself divided into a short thigh support platform 262, which is connected to the bed frame 250 via the leg support base joint 261, and a longer foot and lower leg support platform 264. The thigh support platform 262 and the foot and lower leg support platform 264 are pivotally connected to each other via a foot and lower leg support joint 263.

[0140] In Figure 15The head and back support unit 230 is in a raised position, with the back support platform 232 and the associated head support platform 234 positioned as far as possible. The foot and leg support unit 260 is in a raised and angled position above the lying surface.

[0141] Each functional fitting 210, 270 comprises a longitudinal beam 211, 271 designed as a rectangular steel profile, which is predominantly made of painted steel and extends centrally under the bed frame 250 in the direction of the bed's longitudinal axis. The longitudinal beam 211 is connected to the head frame section 253 via a mounting bracket 211.1 and to the cross member 258 via a further end fitting. The longitudinal beam 271 is attached to the cross member 257 and to the foot frame section 254.

[0142] At the respective ends of the functional fittings 210, 270 facing the outside of the bed, a motor base bearing 222, 273 is arranged, on which the respective rear end of a linear drive 221, 275 is pivotably mounted. The linear drives 221, 275 each comprise a lifting tube 224 whose length can be varied by an electric motor drive. The motor base bearing 222 for the head and back support unit 230 is arranged as close as possible to the outer and lower end of the longitudinal beam 211, so that the angle at which the linear drive acts on the lifting frame 212 is as large as possible and the force required for the lifting movement of the head and back support unit 230 is reduced by lengthening the effective lever arm.

[0143] Each erection frame 212, 272 is formed by two interconnected arms, each having a lower attachment end for lateral pivoting to the respective longitudinal beam 211, 271, thus enclosing it on both sides with an intermediate axis 215, 275. They then transition into a widened, V-shaped section where the distance between the arms increases. In the erection frame 212 for the head and back support unit 230, the arms transition at their free upper ends into parallel end sections, which are designated as upper arms 213. The erection frames 212, 272 are each supported by U-shaped bearing elements, which are supported on the crossbeams 257, 258.

[0144] The design and function of the two functional fittings 210, 270 for the head and foot ends are largely identical with regard to the features described so far. Both functional fittings 210, 270 are designed to raise the two separate and articulated support platforms 232, 234, 262, 264 with just one motorized linear drive, and to bring them into a position in which the back support platform 232 and the head support platform 234, or the thigh support platform 262 and the foot and lower leg support platform 264, are aligned at a specific angle to each other and to the bed frame 250, thus enabling a comfortable posture for the person lying on the bed.

[0145] The forces acting on and from the support platforms 232, 234, 262, 264 can be effectively absorbed by the wide uprights 212, 272, thus achieving stable support without requiring any parts of the functional fittings 210, 270 to be directly attached to the frame side members 251. Instead, sufficient free space remains between the uprights 212, 272 and the frame side members 251, allowing narrower or wider bed frames to be equipped with the same functional fittings 210, 270 designed according to the invention. For relocation and transport, the bed frame 250 can be disassembled in a known manner. The removed functional fitting 210, 270 with longitudinal beams 211, 271 then has small dimensions in width and length, as well as a shallow depth, and can therefore be easily stored.

[0146] The design and function of the respective lifting frames 212, 272 differ between the head and back support unit 230 on the one hand and the foot and leg support unit 260 on the other. If the lifting angle of the back support platform 232 and the thigh support platform 262 is defined as positive with respect to the upper edge of the bed frame 250 and is related to a lying surface parallel to the upper edge of the bed frame 250, then the head support platform 234 should, at least in the final position of the lifting position, assume a positive angle relative to the back support platform 232; that is, the head support platform 234 should be inclined more towards the bed frame 250 than the back support platform 232. In contrast, in the lifting position of the foot and leg support unit 260, a negative angle should exist between the thigh support platform 262 and the foot and lower leg support platform 264. Set a lowered position.This necessitates different designs for the functional fittings 210, 270.

[0147] The functional fitting 270 for the foot and leg support unit 260 is of simple design. The lifting frame 272 is pivotally connected on one side to the longitudinal beam 271 and on the other side to a bearing element 279 on the underside of the foot and lower leg support platform 264. When the linear drive 275 is pivotally attached to the longitudinal beam 271, the lifting frame 270 is progressively pivoted upwards and raised relative to the central platform 255 by the linear drive 275, which is pivotally attached to the longitudinal beam 271.

[0148] The joint 265 on the underside of the foot and lower leg support platform 264, viewed from the side, moves along a path determined by the constant length between the joints of the lifting frame 272 and the constant length between joints 261 and 263, as well as by the variable length of the lifting tube on the linear drive 275. This forced guidance not only raises the foot and lower leg support platform 264 but also moves it longitudinally along the bed frame 200 towards the center. The thigh support platform 262, coupled between them, is quickly moved into a steep position, not least due to its short length. Meanwhile, the foot and lower leg support platform 264 remains in a rest position approximately parallel to the lying surface during the movement into the upright position and lowers slightly towards the foot frame section 254 at the end of the movement.

[0149] The erection frame 212 on the head and back support unit 230 is similar in design to the erection frame 272 for the foot and leg support unit 260 with respect to a V-shaped base element, also referred to as a "swing", which includes the two upper arms 213 and a connecting traverse 2 14 to which the linear drive 221 is articulated.

[0150] For the headrest platform 234, however, unlike the foot and leg support unit 260, it is to be ensured that it never assumes a negative angle relative to the back support platform 232 in any phase of the movement of the head and back support unit 230, i.e., that it does not tilt backwards. Rather, the headrest platform 234 should be inclined more towards the center of the bed frame 200, at least in the final position of the upright position of the back support platform 232, than the back support platform 232 to which it is connected.

[0151] For this purpose, the functional fitting 210 is specially designed for the head and back support unit 230, as can be seen from the enlarged isometric view of the reverse side in Figure 16 will be explained.

[0152] As previously described, the erection frame 212 is formed by two upper arms 213 connected to each other via a crossbeam 214. These upper arms extend from arms that each have a lower attachment end for lateral connection to an erection frame base joint 215 on the longitudinal beam 211. The arms initially extend a short distance parallel to each other from the erection frame base joint 215, running close to the longitudinal beam 211 on both sides. They then transition obliquely into a widened section where the distance to the longitudinal beam 211 increases continuously, and at their respective free ends, they transition again into parallel end sections that form the upper arms 213. The upper arms 213 are significantly spaced from the side surfaces of the longitudinal beam 211.The widening of the arms must result in such a lateral offset relative to the side surfaces of the longitudinal beam 211 that the linear drive 221, in a rest position not shown with the head and back support unit 230 fully lowered, can be completely accommodated in the free space between the longitudinal beam 211 and the left upper arm 213 of the erection frame 212.

[0153] The functional fitting 210 has an additional backrest steering lever 216 on each of its two upper arms 213. This lever is articulated to both the upper arm 213 and to a backrest bearing element 218. The two backrest bearing elements 218 are attached to the rear and underside, respectively, of a backrest support beam 238 on the backrest platform 232. The backrest steering levers 216 are attached to coupling joints 216.1, which are located on the upper arms 213 approximately midway between the base of the crossbeam 214 and the end of the upper arm.

[0154] At the outermost end of each upper arm 213, a headrest steering lever 217 is provided, which is connected to a coupling joint 217.2 on the upper arm 213 and to a coupling joint 217.1 on a headrest bearing element 219. The headrest bearing elements 219 are attached to a headrest support beam 236 of the headrest platform 234.

[0155] The back support joint 240 is used in the Figure 16 The illustrated embodiment is designed as a four-bar linkage. Figure 24 is a detailed enlargement of the illustration. Figure 16At the base of the back support joint 240, two articulating levers 243, 244 are visible, which are mounted on two spaced-apart joints 241, 242. Two further joints are not visible; they are attached to the side surfaces of the back support side frame elements 237. Due to the four-joint design, the back support 232 is simultaneously shifted slightly towards the head end when the chair is raised, so that a mattress resting on it is less creased in the area of ​​the base of the back support 232 than would be the case with a fixed joint point.

[0156] The kinematics in the head and back support unit 230 according to the invention are achieved through the special properties of the functional fitting 210. To illustrate this, the figure shows... Fig. 17 an abstracted view of the head and back support unit 230, taking into account that the abstracted model in Figure 17only one functional plane is shown by one of the upper arms 213, while the actual functional fitting 210 has two parallel and identically designed functional planes due to the two upper arms 213 on the erection frame 212: In a region of the upper arm 213 extending between the crossbeam and the free end of the upper arm 213, a linkage mechanism is formed with a total of five fixed elements, represented as rods, and seven parallel pivot axes, represented as circles. The rods in the linkage mechanism are formed by the upright frame 212, including the upper arms 213, the steering levers 216 and 217, the backrest platform 232, and the headrest platform 234. One fixed axis is formed by the backrest joint 231; another fixed axis by the upright frame base joint 215. A movable axis is formed by the headrest joint 233 between the backrest platform 232 and the headrest platform 234. Two of the movable axes are formed by coupling joints 216.2, 217.2 for the head and back support steering levers 217, 126, which are located on the upper arms 213. The distance between them is designated xA.The remaining two movable axes are formed at the connection of the coupling joints 216.1, 217.1, to which the bearing levers 216, 217 are each connected to bearing elements 218, 219 on the undersides of the back and headrests 232, 234. The headrest joint 233 is located longitudinally between them, but in a position that is higher relative to the upright frame 212 than that of the coupling joints 216.1, 217.1. In a preferred embodiment of the functional fitting 210, the distance xS between the coupling joints 216.1, 217.1 in the longitudinal direction of the upper arm 213 is smaller than the distance xA. In addition, the end-side headrest steering lever 217 on the headrest platform 234 is slightly longer than the backrest steering lever 216 connected to the backrest platform 232.Functionally, the movement of the upper arms 213 of the uprighting frame 212 and the back support platform 232 is determined only by a part of the linkage mechanism, which comprises a four-bar linkage with rods 212, 216, and 232, as well as joints 215, 216.1, 216.2, and 231. A further part of the linkage mechanism, which controls the movement of the head support platform 234, connects to this four-bar linkage via the common joints 216.1 and 216.2. This further part also includes joints 217.1, 217.2, and 233.

[0157] Since the headrest platform 234 is connected to the backrest platform 232 via a total of five joints, an additional degree of freedom is provided, which allows the position of the headrest platform 234 relative to the backrest platform 232 to be indeterminate. To ensure that the headrest platform 234 moves relative to the backrest platform 232 only in such a way that it tilts towards the center of the bed but does not fall backward, the headrest steering lever 217 is longer than the backrest steering lever 216.

[0158] As a further measure to raise the headrest platform 234 from its resting position and prevent it from tipping backwards and downwards, fixed stops are preferably provided, as shown in the isometric detail view in Figure 18 visible on the part of the erection frame 212 located near the head frame part 253.

[0159] In Figure 18The head and backrest platforms 232,2 34 are each in their fully lowered rest position. Fixed stops 217.4 in the form of welded-on round steel sections are attached to the two upper arms 213 of the lifting frame 212. The rear, lower edge of the headrest steering lever 217 rests on these stops. A further fixed stop 217.3 is attached to each of the headrest bearing elements 219, against which the headrest steering lever 217 rests with its front, upper edge. The steering lever 216 has only one fixed stop 216.4, which is designed as a notch in the backrest steering lever 216.

[0160] Figure 19 Figure 1 shows the support for the steering lever 216 in a further isometric detail view. The cutout for the fixed stop 216.4 extends laterally inwards by approximately ¾ of the sheet thickness of the steering lever 216, thus enabling a stable support on the upper edge of the upper arm 213.

[0161] Figure 20is an isometric view of a framed slatted frame 200' from a rear oblique angle, which is built on a functional fitting 210' designed according to the invention.

[0162] The slatted frame 250' comprises two parallel, longitudinally extending frame side sections 251', 252', and at one end a head frame section 253' connecting the frame side sections 251', 252', and at the foot end a foot frame section 254', thus forming a fully enclosed, rectangular slatted frame 250'. Crossbeams extend between the frame side sections 251', 252' in a central section of the length, of which in Figure 19 Only the crossbeam 258' associated with a head and back support unit 230' is visible. One end of a longitudinal beam 211' of the functional fitting 210' for the head and back support unit 230' is mounted on the crossbeam 258'; the other end is connected to the head frame part 253'.

[0163] In addition, the slatted frame 200' has a functional fitting 270' for a foot and leg support unit 260'.

[0164] A back support joint 240' is formed on the frame side parts 251', 252', via which a back support platform 232' of the head and back support unit 230' is pivotably connected to the slatted frame 250'. On the other side, facing the foot end, a leg support base joint 261' is formed, via which the foot and leg support unit 260' is pivotably attached to the slatted frame 250'.

[0165] A fixed center level 255' is also visible in a central area of ​​the slatted frame 250'. The center level 255' comprises slats that are stationary on the bed frame and are therefore neither part of the head and back support unit 230' nor the foot and leg support unit 260'.

[0166] The head and back support unit 230' and the foot and leg support unit 260' each contain two independently movable support platforms to allow for comfortable adaptation to the human anatomy. The head and back support unit 230' is further divided into the back support platform 232', which is directly connected to the slatted frame 250' via the back support joint 240', and a shorter head support platform 234', which is connected to the back support platform 232' via a head support joint 233'.

[0167] The foot and leg support unit 260' is itself subdivided into a short thigh support platform 262', which is connected to the slatted frame 250' via the leg support base joint 261', and a longer foot and lower leg support platform 264'. The thigh support platform 262' and the foot and lower leg support platform 264' are pivotally connected to each other via a foot and lower leg support joint 263'.

[0168] In Figure 20 The head and back support unit 230' is in a raised position, with the back support platform 232' and the associated head support platform 234' positioned as far as possible. The foot and leg support unit 260' is also in a raised and angled position above a lying level L. The functional fitting 270' is provided to move this unit.

[0169] The functional fitting 210' comprises a longitudinal beam 211' designed as a rectangular steel profile, which is predominantly made of painted steel and extends longitudinally within the slatted frame 250'.

[0170] At the end of the functional fitting 210' facing the head frame section 253', a motor base bearing 222' is arranged, on which the respective rear end of a linear drive 221' is pivotally mounted. The linear drive 221' comprises a lifting tube 224' whose length can be varied by an electric motor drive and which is articulated to a motor crossbeam bearing on a crossbeam 214' of the erection frame 212'.

[0171] The erection frame 212' is formed by two arms, each with a lower attachment end for lateral pivoting to the longitudinal beam 211', thus enclosing it on both sides with an intermediate axis, forming an erection frame base joint 215'. These arms then transition into a widened, V-shaped section where the distance between them increases. In the erection frame 212' for the head and backrest unit 230', the arms extend at their free upper ends into short, parallel end sections. A headrest steering lever 217' is pivotally attached to each of these end sections. This lever is connected on one side to a coupling joint 217.2' at the respective end section of the arms and on the other side to a headrest bearing element 219' via a coupling joint 217.1'.The headrest bearing elements 219' are attached directly to the underside of the side headrest side frame elements 235', so that the functional fitting 210' can also be used if only loosely mounted and / or springy slats extend between the headrest side frame elements 235', but there is no fixed underbeam or other type of rigid crossbeam.

[0172] Figure 21 Figure 2 shows the slatted frame 200' with frame 250' in an isometric view from a slightly oblique front angle. For clarity, the slats that form the actual mattress support have been removed. They extend between the head support side frame elements 235', which are aligned in pairs parallel to each other, the back support side frame elements 37', and the corresponding side frame elements of the thigh support platform 262' and the foot and lower leg support platform 264'.

[0173] The functional fittings 210' and 270' for the head and back support unit 230' and the foot and leg support unit 260' are very similar in design and differ essentially in that the functional fitting 270' for the foot and leg support unit 260' does not include head support steering levers 217'. Otherwise, the functional fittings 210' and 270' can be formed from several identical or similar parts, resulting in cost savings.

[0174] The V-shape of the erection frames 212', 272' provides stable support without requiring any parts of the functional fittings 210', 270' to be directly attached to the frame side panels 251', 252'. Instead, sufficient free space remains between the erection frames 212', 272' and the frame side panels 251', 252' for the motorized drives.

[0175] As already described above for the bed frame 200, the headrest platform 234' of the framed slatted base 200' should also be inclined more forward than the backrest platform 232', at least in the final position of the upright position. Conversely, in the upright position of the foot and leg support unit 260', a negative angle should be established between the thigh support platform 262' and the foot and lower leg support platform 264'.

[0176] The functional fitting 270' for the foot and leg support unit 260' has an erection frame 272' which is pivotally connected on one side to the longitudinal beam 271' and on the other side to a bearing element 279 on the underside of the foot and lower leg support platform 264'. By means of the linear drive 275', which is pivotally attached on one side to the longitudinal beam 271' and on the other side to the crossbeam 274', the erection frame 272' is progressively pivoted upwards and raised relative to the plane of the upper edge of the slatted frame 250' when the motorized linear drive 275' is actuated.

[0177] The coupling joint 2 77' on the underside of the foot and lower leg support platform 264', viewed from the side, moves along a path determined, firstly, by the constant length between the joints 276', 278' of the lifting frame 272' and the constant length between the joints 261', 263', and secondly, by the variable length of the lifting tube on the linear drive 275'. This forced guidance not only raises the foot and lower leg support platform 264' but also simultaneously moves it longitudinally along the slatted frame 200' towards its center.The thigh support platform 262', coupled in between, is moved quite quickly into a steep position, not least because of its short length, while the foot and lower leg support platform 264' remains in a rest position approximately parallel to the lying plane during the movement into the upright position and only lowers slightly towards the foot frame part 254' at the end of the movement.

[0178] The headrest platform 234' should not tilt backwards at any stage of its movement. At least in the final position of the upright posture, it should be inclined more towards the center of the slatted frame 200' than the backrest platform 232' to which it is connected. The uprighting frame 212' of the head and backrest unit 230' has a V-shaped base element, also referred to as a "swing arm," which, in addition to the splayed arms, includes a connecting crossbar 214' to which the linear drive 221' is articulated. The splay of the arms results in such a lateral offset relative to the side surfaces of the longitudinal beam 211' that, in a lowered rest position of the head and backrest unit 230', the linear drive 221' can be completely enclosed in the free space between the longitudinal beam 211' and the uprighting frame 212'.

[0179] The longitudinal beam 211' extends between an angle profile 211.1', which is supported on the head frame part 253', and a cross beam 258', which is designed as a round tube and extends in the area of ​​the central plane 255' between the frame side parts 251', 252'.

[0180] The longitudinal beam 271' extends between an angle profile 271.1', which is supported on the base frame part 254', and a cross beam 257', which is also designed as a round tube and which also extends in the area of ​​the middle plane 255' between the frame side parts 251', 252'.

[0181] As the side view of the slatted frame 200' in the in Figure 22As shown in the depicted resting position, the lying surface L is defined by the upper surface of the slats that form part of platforms 264', 262', 232', and 234'. It is also evident that the motor base bearing 222' for the head and back support unit 230' is located very close to the head frame section 253' and is even positioned below the enclosure of the slatted frame 250'. Because the motor base bearing 222' is located directly next to the head frame section 253', the angle at which the linear drive acts on the lifting frame 212' is increased, and the force required for lifting the head and back support unit 230' is simultaneously reduced by lengthening the effective lever arm.

[0182] The motor base bearing 273' for the drive of the foot and leg support unit 260' is also arranged below the profile cross-section of the associated longitudinal beam and protrudes downwards from the enclosure by the frame 250'.

[0183] The erection frames 212', 272' also each protrude partially downwards from the enclosure of the frame 250'.

[0184] Figure 23Figure 2 shows the slatted frame 200' from below in its resting position, meaning that the platforms 264', 262', 232', 234' form a continuous lying surface. The lifting frame 212' for the headrest and backrest platforms 234', 232' and the lifting frame 272' for the leg and footrest platforms 262', 264' each comprise V-shaped arms splayed from one another, each connected by a crossbeam 214', 274'. However, they are not mirror-symmetrical with respect to their respective longitudinal beams 211', 271', and the longitudinal beams 211', 271' are not aligned on a central axis M of the frame 250'. Rather, they are offset laterally and arranged on different sides of the central axis M such that the lifting tubes of the linear drives 221', 275' are aligned on the central axis M. This results in less twisting of the frame 250' when the linear drives 221', 275' are actuated.The slight asymmetry of the erection frames 212', 272' does not result in any disadvantages in view of the large support width. Reference symbol list

[0185] 100 Bed frame 10; 10' Functional fitting 11 Longitudinal beam 11.1 Angle profile 11.2 Mounting bracket 12; 12' Erection frame 13; 13' Arms 14; 14' Crossbeam 15 Erection frame base joint 16 Backrest steering lever 16.1, 16.2 Coupling joints 16.4 Fixed stop 17 Headrest steering lever 17.1, 17.2 Coupling joints 18 Backrest bearing element 19 Headrest bearing element 20' Roller 21 Linear drive 22 Motor base bearing 23 Motor crossbeam bearing 24 Lifting tube 30; 30'Head and back support unit 31Back support joint 32Back support 33Head support joint 34Head support 50Bed frame 52Head frame section 51Side frame section 53Foot frame section 54Side frame section 55Center plate 60Foot and leg support unit 61Leg support base joint 62Thigh support 63Foot and lower leg support joint 64Foot and lower leg support 65Joint 70Functional fitting 71Longitudinal beam 72Upright frame 74Crossbeam 75Linear drive 200, 200'Bed frame 210, 210'Functional fitting 211; 211'Longitudinal beam 211.1; 211.1'Angle profile 212; 212'Upright frame 213Upper arms 214;214'Crossbeam 215; 215'Upright frame base joint 216; 216'Backrest steering lever 216.1, 216.2, 216.1', 216.2'Coupling joints 216.4Fixed stop 217; 217'Headrest steering lever 217.1, 217.2, 217.1', 217.2'Coupling joints 218; 218'Backrest bearing element 219; 219'Headrest bearing element 221; 221'Linear drive 222; 222'Motor base bearing 223; 223'Motor crossbeam bearing 224; 224'Lifting tube 230; 230'Head and backrest unit 231; 231'Slatted frame side frame 232; 232'Back support platform 233; 233'Headrest joint 234; 234'Headrest platform 235; 235'Headrest side frame elements 236Headrest support beam 237; 237'Back support side frame elements 238Back support beam 240; 240'Back support joint 241Front joint axis 242Rear joint axis 243Front joint lever 244Rear joint lever 250Bed frame 250'Slatted frame 251, 252; 251', 252'Side frame parts 253; 253'Head frame part 254; 254'Foot frame part 255; 255'Center platform 257, 258; 257', 258' Crossbeam 260;260'Foot and leg support unit 261; 261'Leg support base joint 262; 262'Thigh support platform 263; 263'Foot and lower leg support joint 264; 264'Foot and lower leg support platform 270; 270'Functional fitting 271; 271'Longitudinal beam 272; 272'Erecting frame 273; 273'Motor base bearing 274; 274'Crossbeam 275; 275'Linear drive 276, 276'Erecting frame base joint 277, 277'Coupling joint 278, 278'Motor crossbeam bearing 279; 279'Foot support bearing element;

Claims

1. Motorized functional fitting (10; 10'; 210; 210') for a base (100; 200; 200') of a box spring bed or a platform bed or a slatted bed base, the bade base (100; 100'; 200) comprising a bed frame (50; 250; 250') with at least one middle plate (55), a back support (32) articulated to it and a head rest (34) articulated to the back support (32), or the bed base (200) or the slatted bed base (200') comprising at least a back support platform (232; 232') articulated thereto, which is connected to a head rest platform (234; 234'), with at least: - an erecting frame (12; 12', 212; 212') which has two arms connected to each other via at least one traverse (14; 14'; 214; 214') - a linear drive (21; 221; 221') with a lifting tube (24; 224; 224'), which linear drive is articulated to the erecting frame (12; 12') with one end and can be supported at a fixed point of the bed base (100; 200; 200') or the frame (50, 50', 250; 250') with the other end; - wherein the functional fitting (10; 10'; 210; 210') comprises a longitudinal beam (11; 211; 211') which is to be arranged on a bed frame central axis and which is connectible to the bed frame (50) or the frame (250, 250'), to which longitudinal beam the erecting frame (12; 12', 212; 212') is articulated; - wherein the erecting frame (12; 12'; 212; 212') is forked-shaped and has at least a lower arm which is articulated to the longitudinal beam (11; 11') at an erecting frame base joint (15; 215; 215'), - wherein the erecting frame (12; 12'; 212; 212') comprises two upper arms (13; 13'; 213) which are arranged so as to be spaced to each other and to the longitudinal beam (11; 211; 211') arranged between them, - wherein the traverse (14; 14'; 214; 214') extends above the longitudinal beam (11; 211; 211') and transversely between the lower arms and / or the upper arms (13; 13'; 213; 213') interconnecting them; - wherein the linear drive (21; 221; 221') is articulated to the longitudinal beam (11; 211; 211') and the erecting frame (12; 12'; 212; 212') and is arranged between the longitudinal beam (11; 211; 211') and one of the upper arms (13; 213; 213') of the erecting frame (12; 12'; 212; 212') when the erecting frame (12; 12'; 212; 212') is lowered, wherein two head rest bearing elements (19; 19'; 219; 219') are provided for the head rest (32) or the head rest platform (232; 232') and the erecting frame (12; 12'; 212, 212') is articulated to a head rest bearing element (19; 219; 219') to be connected to the head rest (34) or to the head rest platform (234; 234') in each case via at least one head rest steering lever (17; 217; 219') and the erecting frame (12; 12': 212; 212') comprises at least one support element for supporting the back support (32) or the back support platform (232; 232') during erecting.

2. Functional fitting (10; 10'; 210; 210') according to claim 1, characterized in that the back support (32) or the back support platform (232; 232') is pivotally connected to the head rest platform (234; 234') or to the head rest (32) via a head rest joint (33; 33'; 232; 232'), that the arms of the erecting frame (12; 12'; 212; 212') are connected to a head rest steering lever (17; 17'; 217; 217') in each case via a coupling joint (17.2; 17.2'; 217.2; 217.2'), which head rest steering levers (17; 17'; 217; 217') are each connected to a head rest bearing element (1); 19'; 219; 219') via another coupling joint, wherein preferably the pivot angle of the steering lever (17) is limited by at least one fixed stop (16.4; 216.4) on an upper arm (13; 13'; 213; 213').

3. Functional fitting (10; 10'; 210; 210') according to any of claims 1 to 2, characterized in that the pivot angle of the steering lever (17) for the head rest (34) or the head rest platform (34; 34') is limited by at least one fixed stop (16.4; 216.4) on the head rest bearing element (19; 19').

4. Functional fitting (10; 10'; 10; 210; 210') according to any of claims 1 to 3, characterized in that the support element for the back support (32) or the back support platform (232) is configured as a back support steering lever (16; 216; 216') which is articulated to a back support bearing element (18; 18'; 218; 218') to be fixedly attached to the back support (32) or the back support platform (232) via a coupling joint (16.1; 216.1; 216.1').

5. Functional fitting (10; 10'; 10'; 210; 210') according to claim 4, characterized in that the pivot angle of the steering lever (16; 16'; 216; 216') for the back support (32) or the back support platform (232; 232') is limited by at least one fixed stop (16.4) of the steering lever (16, 16'; 216; 216') supported on an upper arm (13; 13'; 213; 213').

6. Functional fitting (10; 10'; 10'; 210; 210') according to claim 4, characterized in that the fixed stop (16.4; 216.4; 216.4') is formed by a notch of the steering lever (16; 216; 216').

7. Functional fitting (10) for a bade base of a box spring bed according to any of claims 1 to 3, characterized in that the support element for the back support (32) is formed by at least one roller (20') which at least partially rises over the erecting frame (12').

8. Functional fitting (10') according to claim 7, characterized in that a pair of rollers (20') is arranged on each upper arm (13').

9. Head rest and back support unit (30; 230; 230') for a bed base of a box spring bed, which bed base (100) comprises a bed frame (50) with at least one central plate (55) or for a platform bed with a bed frame (250), with at least: - a functional fitting (10; 210) according to any of claims 1 to 6; - a back support (32) or back support platform (232; 232') to be pivotally connected to the central plate (55) or to be pivotally connected to the bed frame or back rest support platform (232; 232') via a back support joint (240), on which back support (32) or back support platform (232; 232') the back support bearing element (18; 218; 218') is attached, and - a head rest (34) or head rest platform (234; 234') which is articulated to the back support (32) or the back support platform (232; 232') to which the head rest element (19; 219; 219') is attached, wherein preferably - the head rest steering lever (17; 217; 217') is longer than the back support steering lever (16; 216; 216') and - in the lowered state of rest of the erecting frame (12; 212; 212'), the distance xS measured in the longitudinal direction between the coupling joints (16.1; 216.1; 216.1'; 217.1; 217.1') on the head rest (34) and on the back support (32) or the head rest platform (234; 234') is smaller than the distance xA between the coupling joints (16.2; 17.2; 216.2; 216.2'; 217.2; 217.2') on the upper arms (13; 13'; 213; 213') of the erecting frame (12; 212; 212').

10. Head rest and back support unit (30') for a bed base (100') of a box spring bed, which bed base (100') comprises a bed frame (50) with at least one central plate (55), with at least: - a functional fitting (10') according to any of claims 6 or 7; - a back support (32) to be pivotally connected to the central plate (55), and - a head support (54) which is articulated to the back support (32) and to which the head rest bearing element (19) is attached, wherein the at least one roller (20'), in the lowered position of rest of the erecting frame (12'), has no contact to the rear side of the back support (32) and, in an intermediate position in which the head rest is inclined by at least 15° relative to the lying plane (L) formed by an upper edge of the central plate (55), abuts against the rear side of the back support (32).

11. Head rest and back support unit (30; 30'; 230; 230') according to any of claims 9 or 10, characterized in that the back support joint (31) and the head rest joint (33) are each formed by at least two spaced hinges with a common pivot axis.

12. Box spring bed comprising a bed base (100; 100') with a rectangular bed frame (50) which has two parallel frame side members (51, 52), head and foot frame members (51, 53) connecting these, and at least one central plate (55) which extends in the lying plane (L) between the frame side members (52, 54), and a head rest and back support unit (30; 30') according to any of claims 9 to 11, wherein the back support (32) is connected to the central plate (55) via a back support joint ) (31).

13. Platform bed comprising a bed base (200) with a rectangular frame (250) which has two parallel frame side members (251, 252) and head and foot frame members (253, 254) connecting these, and with head rest and back support unit (30; 30'; 230) according to claim 9, wherein preferably, the frame (250) comprises at least one central platform (255) which extends in a lying plane (L) between the frame side members (252, 254).

14. Platform bed according to claim 13, characterized in that the back support platform (232) is connected to the central platform (255) via a back support joint (231), wherein preferably the frame (250) comprises at least one cross member (258) which extends between the frame side members (251, 252) and the back support platform (232) is connected to the cross member (258) via a back support joint (240).

15. Framed slatted base (200') with a rectangular frame (250') which comprises two parallel frame side members (251', 252') and head and foot frame members (253', 254') connecting these, and with a head rest and back support unit (30; 230) according to claim 9, wherein preferably the frame (250') comprises a central platform (255') extending in the lying plane (L) between the frame side members (251', 252').