Electromotive drive for a piece of furniture for sitting and / or lying on, and piece of furniture for sitting and / or lying on

Abstract

The invention relates to an electromotive drive (1) for a piece of furniture (10) for sitting on and / or lying on. The electromotive drive comprises a housing (2) made of injection-molded plastic, a first electric motor (3), a first threaded spindle (5), a first linkage bar (7), a first lever (9) and a first pivot axle (12); wherein the housing (2) accommodates the first threaded spindle (5) and the first pivot axle (12), and is designed to be fastened to a first support part (14) of the piece of furniture (10) for sitting on and / or lying on; and wherein the lever (9) is mounted in or on the housing (2) via the pivot axle (12) and can be pivoted via the electric motor (3), the threaded spindle (5) and the linkage bar (7).

Description

[0001] Electric motor drive for a seat and / or reclining furniture as well as seat and / or reclining furniture

[0002] Description

[0003] The present invention relates to a seating and / or reclining furniture and an electric motor drive for such furniture. In particular, the present invention relates to a compact assembly for simplifying the construction of an electrically adjustable seating and / or reclining furniture.

[0004] To increase seating and / or reclining comfort, furniture has been equipped with electric motor drives for many years. For example, a backrest can be swivelled (raised or lowered) relative to a seat support (also called a "seat"). The same applies to leg and / or footrests.

[0005] The drives are typically designed as robust and heavy units, in which metal levers are mounted in metal housings. In particular, the levers are guided in pivot axes that are integrated into the furniture. In other words, the pivot axes are inherent to the (previously) unmotorized piece of furniture. The levers are sometimes actuated by pull or push tabs that engage with them. This allows the drive units to be compact, lightweight, and cost-effective. Another advantage of such arrangements is the exceptional versatility of the drive units, as their components can be flexibly adapted to the specific requirements of the furniture being motorized.In other words, the pull or push tab of the electric motor drive simply needs to be engaged in a suitable manner with the lever of the seat and / or reclining furniture to establish the functional connection.

[0006] In today's globalized economy, cost-effective logistics are crucial for a product's economic success. Container capacities must be utilized as efficiently as possible to achieve competitive costs in overseas trade. However, bulky structures, such as conventional electric motor drives, are difficult to package compactly due to their protruding levers, pull and / or push tabs, or other components. Unless the user is expected to undertake complex assembly, significant unused space remains within the packaging units, resulting in costly logistics.Finally, electromechanical drives known in the prior art for equipping or retrofitting beds and other seating and / or reclining furniture are designed to be relatively universally applicable in order to enable their use on a wide variety of furniture and to maximize the number of electromechanical drives that can be sold. However, this sometimes necessitates complex or inelegant and costly mechanics, and does not always optimally meet the mechanical requirements of seating and / or reclining furniture. In particular, large unsupported lengths result in a considerable stiffness requirement, which is not necessary for furniture with shorter unsupported lengths and contributes to unnecessary costs, weight, and volume.

[0007] It is an object of the present invention to solve at least one of the aforementioned problems or issues of the prior art.

[0008] The present invention solves the aforementioned problem by means of an electric motor drive for a seat and / or reclining piece of furniture with the features according to claim 1. The dependent claims describe preferred embodiments of the invention.

[0009] The present invention provides an electric motor drive for seating and / or reclining furniture. The seating and / or reclining furniture can, for example, include a bed, a box spring bed, a chaise longue, a lounger, a sofa, a car seat, or the like. The electric motor drive can be understood as a drive assembly or a drive-gear assembly. It comprises a housing made of injection-molded plastic, which can, in particular, have an elongated and as flat a shape as possible. The injection-molded housing can, for example, have reinforcing ribs which, between the elements mentioned below, ensure high rigidity of the housing on the one hand and low material and cost expenditure on the other. In addition, the mass of the electric motor drive can be drastically reduced. A first electric motor is arranged in or on the housing, which is provided for the electromechanical conversion of energy in order to adjust the seating and / or reclining furniture.The electric motor drives a first threaded spindle, which can be made of metal, for example, and arranged in a cavity of the housing. The threaded spindle can be guided, for example, by ball bearings, bushings, or directly within the injection-molded plastic. A first pull tab is provided to create a functional connection between the threaded spindle and a first lever, which is used to pivot a second support element relative to a first support element of the seating and / or reclining furniture. The first lever pivots about a first pivot axis located within the housing. By mounting the first lever via the first pivot axis within the housing, a compact and adaptable spatial unit is provided, which is durable, cost-effective, and optimized with regard to operating and noise levels.The first pivot axis can, for example, be provided as a metal bolt within the housing, which is held in place by a cotter pin or a snap ring. The housing defines, in particular, the spatial relationship between the electric motor, the threaded spindle, the pull tab, the pivot axis, and the lever. The electric motor can be flanged to the housing, partially or completely integrated into it, or mounted to the housing by means of additional components. The housing is designed to be attached to a first support element of the seating and / or reclining furniture. For this purpose, the housing can have screw tabs, screw holes, or similar structures, which are specifically adapted to the geometry of the seating and / or reclining furniture to be driven by the electric motor. In particular, the screw tabs and / or screw holes can be designed to engage with a structure of the seating and / or reclining furniture.For this purpose, flange surfaces can be provided on the housing, which are also made of injection-molded plastic, preferably integrally with the housing. The housing can be attached to the seating and / or reclining furniture via screw tabs or screw holes. The lever can be mounted on or within the housing via the pivot axis in such a way that it can pivot upwards and downwards via the electric motor, the threaded spindle, and the pull tab. The lever can thus be arranged / attached to a pivotally and / or slidably mounted support element of the seating and / or reclining furniture. Depending on the geometry and kinematic constraints, a rolling, sliding, or fixed (e.g., screwed) mounting can be selected. By mounting the lever in the housing or on / by means of the pivot axis, a low-noise, durable, and low-friction mounting can be provided.Lubricants are unnecessary because the levers of the electromechanical drive according to the invention, which are typically slow to adjust, do not tend to generate audible noise or operating sounds anyway. In this way, costly lubricants that attract or promote contamination and may be environmentally harmful can be eliminated.

[0010] Preferably, the first pull tab can be configured via the first threaded spindle to exert a tensile force on the first lever. In other words, the electric motor exerts a tensile force on the pull tab via the threaded spindle to, for example, raise the lever. In this way, the pull tab causes, for instance, the support element actuated by the first lever to rise. A tensile force also acts on the pull tab when the support element actuated by the first lever is lowered. For safety reasons, however, it can be ensured that the tensile force exerted on the first lever by means of the pull tab cannot be increased by the electric motor. In other words, the force transmission between the electric motor and the support element coupled to the first lever can be limited to tensile forces. For example, the first support element can simply rest on the first lever.Alternatively or additionally, the first lever can simply be held in place by the first pull tab to prevent unwanted lowering, while the first pull tab does not prevent the first lever from being manually pivoted upwards (erected). In particular, during such a process, the frictional connection between the first lever and the first pull tab can be released after a certain distance has been traveled, so that the first lever subsequently no longer has a frictional connection with the first pull tab. Thus, the first lever can be manually lowered or pivoted into a logistics position, which will be discussed further below. This logistics position can, in particular, have a compact configuration with the housing.

[0011] The first pull tab can, for example, have a first hook, which in an installed position is preferably designed to be open downwards. If the first lever has a structure corresponding to the first hook (e.g., a pivot axis, a bolt, etc.), the first pull tab can be engaged with or released from the first lever particularly easily. If the hook is open downwards, the first lever must be manually lifted, and the first pull tab must also be lifted to release the positive locking mechanism between the first pull tab and the first lever. If the hook is open upwards, manually lifting the first lever may be sufficient to release the positive locking mechanism, causing the first pull tab to fall out of the first lever by gravity. In this way, the logistics position can be established particularly easily and, in particular, with one hand.

[0012] The first pull tab can consist of or include a sheet metal part, in particular a stamped sheet metal part. For example, the pull tab can have a (metal) bolt that protrudes through the sheet metal. The bolt can engage with or be enclosed by a structure in the housing or by a slide operatively connected to the first threaded spindle. This allows for a cost-effective and lightweight design of the first pull tab.

[0013] The first carriage can be arranged in a linear guide provided by the housing. The lead screw moves the carriage back and forth within the guide. As the carriage moves away from the electric motor, a distal end of the first lever also moves away from the electric motor, and the first support element lowers. As the carriage moves towards the electric motor, the first pull tab also moves towards the electric motor, thereby raising a distal end of the first lever and erecting a support element of the seat and / or reclining furniture coupled to the first lever. By relying solely on the carriage or the lead screw to provide tensile forces, a mechanically lightweight arrangement can be achieved, as the tensile forces are self-stabilizing for the lead screw.

[0014] The pull tab can be pivotally mounted in the slide, which in turn is linearly guided in the housing. The slide typically moves so slowly within the housing that no noise is to be expected or is inaudible. The threaded spindle can be mounted in the slide via a ball bearing, a metal sleeve, or similar component, with a lubricant preventing the generation of noise and frictional heat. A horizontal bolt can mount the pull tab in the slide (e.g., in a bore). The bolt can be secured against unwanted loosening from the slide by a cotter pin, a snap ring, or similar device. A vertical slot in the slide can force a vertical orientation of the pull tab or guide it. This results in a particularly simple design and the possibility of a predefined orientation of the pull tab relative to an engagement point in the first lever (e.g.,...a bolt) for the positive locking mechanism described above.

[0015] The lever can also be designed as an injection-molded part. In particular, the lever can be made of injection-molded plastic. Depending on the design of the lever's mounting in the housing, the main tensile and compressive forces between the lever and the housing are absorbed via a pivot axis made of metal or plastic, while the lever's guides within the housing, which exert forces on the lever via flanks provided in the housing or on housing halves, for example, comprise low-vibration and low-noise plastic-to-plastic interfaces. This does not preclude the possibility that the lever (for example, as an interface to the seating and / or reclining furniture at the distal end) may incorporate screw eyes, screw connections, metal clamps, hinges, bolts, swivel guides for casters, and other mounting bases made of the same or any other material, which, for example,The lever can either be inserted into an injection mold during the injection molding process or subsequently inserted into the (cooled) injection-molded part. Designing the lever as an injection-molded part makes the integration of additional elements particularly easy, as the injection-molded structure can, for example, already provide corresponding interfaces for a snap-fit ​​connection. The lever can be designed as a single-piece injection-molded part. Depending on the requirements for accommodating additional parts or aesthetic considerations, two injection-molded parts (or "halves") can also be screwed, snapped, or clipped together to assemble the lever.

[0016] The housing of the electric motor drive can have screw tabs and / or screw holes on two opposite sides, which are designed to facilitate screwing in a vertical direction, but also, in principle, in a horizontal direction. Thus, the unit according to the invention can be screwed to a first, preferably stationary, support (for example, a buttock support) of the seating and / or reclining furniture via the housing. If the seating and / or reclining furniture has a longitudinal axis extending from a head section towards a foot section, the screw tabs can be spaced apart from each other in a longitudinal and / or transverse direction. In particular, the screw tabs can be provided in such a plurality that two, three, four, or more screw connections to the first support of the seating and / or reclining furniture are possible.

[0017] Cost-effective logistics may require pivoting the first lever into a position where a longitudinal axis of the lever is essentially parallel to a longitudinal axis of the housing, thus reducing the overall length of the electric motor drive to such an extent that the pivot axis is located essentially at a distal end of the folded electric motor drive. In other words, the first lever can be guided or mounted in the housing such that, after the positive locking with the first pull tab is released, it can pivot against an upward movement, against the second support element rising, or against the pull tab being held in place. In this process, the lever also passes through a position where, as an extension of the housing, it contributes to the longest possible configuration of the electric motor drive.After exceeding this position, the lever continues to descend until, after a pivoting of approximately 160 to 180 degrees, it rests against the underside of the housing, either below or essentially parallel to its underside. A gap of a few millimeters or centimeters between the distal end of the lever and the housing may be acceptable in order to minimize the overall length of the electric motor drive for logistics purposes.

[0018] The first threaded spindle can be mounted in the housing in a rotationally fixed, linearly movable manner. In other words, the threaded spindle moves in a linear direction without itself rotating. In doing so, the threaded spindle pushes the slide, which provides the functional connection to the first pull tab and the first lever. The electric motor can be configured to engage with the stationary threaded spindle via a worm gear with an internal thread, the worm gear having an axis of rotation identical to the longitudinal axis of the threaded spindle. The electric motor's axis of rotation can be substantially perpendicular to this axis. In particular, the electric motor's axis of rotation (as well as the longitudinal axis of the threaded spindle) can lie in a horizontal plane if the electric motor drive is installed as intended.

[0019] The threaded spindle can engage a metallic and / or plastic guide with its distal end(s) (towards the electric motor). At least in one end region of the threaded spindle, a structure can be provided by means of which the threaded spindle actuates limit switches depending on its position within the housing. In other words, microswitches can be provided in the housing at those positions that correspond to predefined end ranges of a pivoting path for the first lever. The limit switches can interact mechanically and / or inductively upon collision with the mechanical structure on the threaded spindle. A control board, which can also be located in the housing of the electric motor drive, can control the power supply of the electric motors or the first electric motor.The control unit can also evaluate the control commands received from a remote control (depending on the signals from the limit switches) and move to configurations of the seating and / or reclining furniture that correspond to the user's wishes.

[0020] The housing can comprise a first housing half and a second housing half. In particular, a longitudinal division of the housing, preferably in the vertical direction, can be provided so that a left and a right housing half ("side") lie against each other at their respective vertical interfaces when the housing is assembled. The left and right sides of the housing can each have a first and a second guide surface for the first lever, respectively, which guides the first lever within its working range. The guide surface can be designed, in particular, such that, starting from the pivot axis that pivots the first lever within the housing, a guided length of approximately 20 mm to 60 mm, and in particular 30 mm to 50 mm, is provided as long as the first lever is within its intended working range.Since significantly lower forces are expected on the first lever in a logistics position, the guide surface for the first lever can also be smaller in a downward-pivoted configuration. Here, for example, a guide length of less than 20 mm, and in particular less than 10 mm (measured from the guide pin or pivot axis), can be provided. Furthermore, lateral guidance of the first lever by the housing halves can be completely omitted in this area, allowing for a particularly compact housing design. For the sake of clarity, the above descriptions are limited to the housing and each of the following components: a first electric motor, a first threaded spindle, a first pull tab, a first lever, a first pivot axis, a first worm gear, and a first slide.If, in addition to a first support element that is pivotably mounted relative to a fixed support element, a third support element that is also pivotable relative to the first support element is provided, the housing can further accommodate a second electric motor. This motor allows the third support element to be pivoted independently of the first electric motor. For this purpose, the housing can also accommodate a second threaded spindle and a second pivot axis. A second lever can be pivoted relative to the housing, raised, and optionally lowered into a storage position by means of a second pull tab. Essentially, the aforementioned elements can be arranged symmetrically around a perpendicular surface that is oriented at right angles to the longitudinal axis of the housing or the seating and / or reclining furniture.In particular, the electric motors are arranged facing the center of the housing, while the pivot axes for mounting the levers are located at the distal ends of the housing. Worm gears are positioned at the level of the electric motors, guiding the threaded spindles. Linearly movable slides and at least parts of the pull tabs are located between the threaded spindles and the pivot axes. This allows several levers to be mounted cost-effectively, with low noise, and reliably within a single injection-molded housing, enabling flexible adjustment of support elements of the seating and / or reclining furniture.

[0021] The housing can have a mounting surface at least at a first distal end, which could be described as a flange, support surface, or contact surface with respect to the seating and / or reclining furniture. This surface or structure of the seating and / or reclining furniture can be, for example, metallic, plastic, or wood-based. Crossbeams, leg elements, or other components of the seating and / or reclining furniture can be contacted by the housing, which is adapted to these components, thus enabling a particularly comfortable, stable, and quiet mounting of the electric motor drive.

[0022] The mounting surface can include a screw hole, screw flange, screw eye, or similar feature in the housing, particularly in the injection-molded plastic of the housing, allowing the housing to be secured to the seating and / or reclining furniture. Multiple screw holes, screw lugs, and / or screw flanges are possible to increase the strength of the connection. The mounting surface can also be designed to accommodate different orientations of the contact surfaces on the seating and / or reclining furniture. Specifically, the mounting surface can accommodate horizontal and / or vertical surfaces of the seating and / or reclining furniture. Furthermore, snap-lock mechanisms can be incorporated between the housing and the respective structures of the seating and / or reclining furniture. This allows for a particularly time-efficient, stable assembly process that reduces the number of parts required.

[0023] The housing can be designed within wide limits, depending on its intended use and mechanical / kinetic requirements. For example, its length (extension in the longitudinal direction of the seating and / or reclining furniture) can range from, for example, 350 mm to 750 mm. Alternatively or additionally, its height (perpendicular to the aforementioned longitudinal direction) can range from, for example, 35 mm to 120 mm. The width of the housing, oriented perpendicular to both of the aforementioned dimensions, can, for example, range from 25 mm to 65 mm. All single-digit millimeter dimensions lying between the aforementioned limits are hereby explicitly disclosed and may be used to limit these ranges as needed.

[0024] Preferably, a mounting plate for attaching the first support element of the seating and / or reclining furniture can be pivotably mounted about a horizontal plane at the, in particular distal, end of the first lever. The mounting plate can, for example, have screw holes through which a chipboard, a plastic structure, a solid wood panel, or similar material of the first support element can be mounted. This results in particularly flexible kinematics and low-effort motorization of a seating and / or reclining furniture using the electromechanical drive according to the invention.

[0025] A roller for guiding the second support element can be provided on the second lever, particularly at its distal end. In other words, a roller can be provided on the second lever such that it forms a (single) contact surface between the second support element and the lever. Thus, the lever and the second support element can be mounted about pivot axes that are parallel to each other, but sometimes considerably spaced apart, which increases the flexibility in the application of the electromechanical drive according to the invention.

[0026] To achieve compact dimensions and save volume and injection molding material, the housing can have a reduced height in its central area compared to the distal areas, which also serve as pivot axis mounts. The pivot axes can be positioned particularly low, allowing them to be mounted below the central housing area. This increases the effective lever length between the point of application of the pull tabs and the pivot axes, thereby enhancing the stability, robustness, and perceived value of the electromechanical drive according to the invention. In particular, the forces that can be generated by the motor and the dimensions of the components required for their transmission in the mechanical chain can also be reduced. Furthermore, the probability and volume of potential operating and / or interference noises are reduced.

[0027] According to a second aspect of the present invention, a piece of seating and / or reclining furniture is proposed, which can be designed, for example, as a bed, bed frame, box spring bed, lounger, chaise longue, treatment furniture, sofa, armchair, or the like. The piece of furniture includes an electric drive according to the first aspect of the invention mentioned above, the features, combinations of features, and the advantages arising therefrom being so clearly evident that, to avoid repetition, reference is made to the above descriptions.

[0028] Brief description of the drawings

[0029] Further details, advantages, and features of the present invention will become apparent from the following description of exemplary embodiments with reference to the drawings. Figure 1 shows a sectional side view of an exemplary embodiment of a seating and / or reclining furniture designed according to the invention, including an exemplary embodiment of an electric motor drive according to the invention. Figure 2 shows a perspective, partially sectional top view of the exemplary embodiment shown in Figure 1.

[0030] Fig. 3 shows a perspective, partially cut-away side view of an assembly of an embodiment of an electric motor drive, as presented in conjunction with Figures 1 and 2, and

[0031] Fig. 4 shows a cutaway side view of an alternative embodiment of an electromechanical drive according to the invention in a logistics position.

[0032] Character description

[0033] Fig. 1 shows an embodiment of a seating and / or reclining furniture 1 according to the invention, which has transverse structures 40, 41 that provide an interface for the arrangement of respective mounting surfaces 26, 27, 28, 29 of the housing 2. The mounting surfaces 26, 27 are horizontal, and the mounting surfaces 28, 29 are each vertical, so that a substantially right angle is formed between them and the housing 2 is fixed horizontally and vertically to the transverse structures 40, 41. Further components of the seating and / or reclining furniture 1 are a buttock support as the first support 14, a back support as the third support 16, a foot support as the second support 15, and a leg support as the fourth support 17.The second support element 15 and the fourth support element 17 are coupled to each other via a horizontal pivot axis 48, such that pivoting a first lever 9 via a mounting plate 34, which is pivotally guided in the first lever 9 via a horizontal pivot axis 36, necessarily leads to a pivoting of the second support element 15 and the fourth support element 17. The second lever 11 is arranged essentially symmetrically to the first lever 9 opposite the housing 2. It is configured via a roller 35, which is guided by a pivot axis 37, to pivot the third support element 16 relative to the first support element 14. The levers 9 and 11 are mounted and guided in the housing 2 via pivot axes 12 and 13, respectively. Points of attachment for the pull tabs 7 and 8 are provided on horizontal bolts serving as pivot axes 32 and 33, which have (not shown) hook structures at their distal ends.The hook structures engage with the horizontal bolts. The pull tabs 7, 8 are pivotally guided in linearly displaceable slides 22, 23 via pivot axes 24, 25. The slides 22, 23 are provided in linear recesses or guides by the housing 2. The slides 22, 23 form distal guides for threaded spindles 5, 6, which can be linearly displaced via worm gears 18, 19. For this purpose, the worm gears 18, 19 have internal threads that engage with the threaded spindles. The worm gears 18, 19 are set in rotation by pinions 30, 31, which are mounted on the axes of (not shown) electric motors, allowing the threaded spindles to move away from or towards a center point located between them.In a central region 42 between the pivot axis mounts, the housing 2 has a lower height, with its underside being higher than the pivot axis mounts in the region of the distal ends of the housing 2. Towards the pivot axis mounts, the underside of the housing 2 slopes continuously and strictly monotonically until the underside of the pivot axis mounts forms the underside of the housing 2.

[0034] Fig. 2 shows a perspective top view of the embodiment of the electric motor drive or the seating and / or reclining furniture, which has already been shown in detail in Fig. 1. In addition to the discussion of Fig. 1, the elements shown in the figure are described below in more detail. In the area of ​​the mounting surfaces 26 to 29, a screw tab 53 with a screw bore 21 is provided. The screw tab 53 forms a horizontal flange for attachment to the transverse structure 41 by means of a screw, which is inserted through the screw bore 21. In a central area of ​​the housing 2, two axially parallel electric motors 3, 4 are visible, which are operatively connected to the pinions 30, 31. The threaded spindles 5, 6 are guided proximally in metal sleeves 38, 39, which in turn are adapted to (not shown) longitudinal guides within the housing 2.Also in a central area of ​​the housing 2, a screw tab 20 with a screw bore 21 is provided, designed to be brought into contact with a horizontally oriented surface of the first support part 14 (buttock support part). A screw inserted vertically through the screw bore 21 can be used to secure the housing 2 to the buttock support part. The opposite side of the housing 2, facing the user, is omitted to allow a view of the elements located inside the housing 2. The illustrated housing half has two guide surfaces 54, 55, which face the first lever 9 and the second lever 11, respectively, and ensure their vertical alignment.

[0035] Fig. 3 shows a perspective detail view of a central section of the embodiment of an electric motor drive 1 shown in Figures 1 and 2. Horizontal screw bosses 51, 52 serve to screw together two parts of the housing 2, of which only the rear part is shown. Limit switches 43, 44, 45 serve to detect the respective end positions of the threaded spindles 5, 6. The signals generated by the limit switches 43, 44, 45 are fed via lines (not shown) to a control unit 46, which is located in a lower area of ​​the housing 2. Ball bearings 36, 37 are arranged in cavities of the housing 2 to guide the threaded spindles 5, 6.

[0036] Fig. 4 shows a sectional side view of an alternative embodiment of an electric motor drive 1, as described in detail in conjunction with the preceding figures. In contrast to these figures, the logistics position described above is implemented such that the levers 9 and 11 are arranged essentially horizontally below the housing 2 to reduce the overall length of the electric motor drive 1. A distal portion of a first lever 9 with a roller 35 even projects into the central portion of the housing 42, which is located between the pivot axes of the housing 2. This, along with the tapered shape of the levers 9 and 11 towards their distal ends, allows the second lever 11, when in contact with the roller 35, to have a bottom edge that lies parallel to an upper side of the housing 2.This results in a particularly compact overall configuration for the electric motor drive 1. The pull tabs 7, 8 are unhooked from the levers 9, 11 and rest essentially without positive engagement on the axis areas of the levers 9, 11. When establishing a service position, the levers 9, 11 are pivoted upwards, particularly in contact with the pull tabs 7, 8, until the pivot axes 33 automatically engage with cavities in the structure of the levers 9, 11 (not visible in the illustrated view), and a positive engagement between the pull tabs 7, 8 and the levers 9, 11 is automatically established. The illustrated arrangement shows a rear view of the electric motor drive 1, so that the electric motors 3, 4 are arranged in front of the threaded spindles 5, 6 from the viewer's perspective.Furthermore, unlike the arrangements shown in Figures 1 to 3, the roller 35 is located on the first lever 9 instead of the second lever 11. Otherwise, the features shown and identified by reference numerals correspond to those described in detail above, so a further description is unnecessary.

[0037] In addition to the foregoing written description of the invention, explicit reference is hereby made to the graphic representation of the invention in the figures for its supplementary disclosure. List of reference symbols

[0038] 1 electric motor drive

[0039] 2 cases

[0040] 3, 4 electric motor

[0041] 5, 6 threaded spindle

[0042] 7, 8 pull tab

[0043] 9 levers

[0044] 10 pieces of seating and / or reclining furniture

[0045] 11 levers

[0046] 12, 13 Swivel axis

[0047] 14 first support part

[0048] 15 second support part

[0049] 16 third support part

[0050] 17 fourth support part

[0051] 18, 19 worm gear

[0052] 20 screw tabs

[0053] 21 screw hole

[0054] 22, 23 sleds

[0055] 24, 25 Swivel axis

[0056] 26, 27 horizontal mounting surface 28, 29 vertical mounting surface

[0057] 30, 31 sprockets

[0058] 32, 33 Swivel axis

[0059] 34 Mounting plate

[0060] 35 rolls

[0061] 36, 37 Swivel axis

[0062] 38, 39 metal sleeves

[0063] 40, 41 Cross-structure

[0064] 42 middle area of ​​the housing 43, 44, 45 limit switch 46 control unit 48 swivel axis 49, 50 metal sleeves 51, 52 screw bosses 53 screw tab 54, 55 guide surface

Claims

Claims 1. Electric motor drive (1) for a seat and / or reclining furniture (10) comprising: a housing (2) made of injection-molded plastic, a first electric motor (3), a first threaded spindle (5), a first pull tab (7), a first lever (9) and a first pivot axis (12), wherein the housing (2) accommodates the first threaded spindle (5) and the first pivot axis (12) and is designed to be attached to a first support part (14) of the seating and / or reclining furniture (10), wherein the lever (9) is mounted in or on the housing (2) via the pivot axis (12) and can be pivoted via the electric motor (3), the threaded spindle (5) and the pull tab (7).

2. Electromotive drive (1) according to claim 1, wherein the first pull tab (7) is arranged via the first threaded spindle (5) to exert a pulling force on the first lever (9).

3. Electromotive drive (1) according to claim 1 or 2, wherein the first pull tab (7) has a first hook (17) which is preferably designed to be open downwards or upwards in an installation position.

4. Electromotive drive (1) according to one of the preceding claims, wherein the first lever (9) is configured, to be attached to a second support part (15) of the seating and / or reclining furniture (10) which is designed to be pivotable about a third pivot axis (48) relative to the first support part (14).

5. Electromotive drive (1) according to one of the preceding claims, wherein the pull tab (7) is pivotably mounted in the housing (2).

6. Electric motor drive (1) according to one of the preceding claims, wherein the lever (9) is designed as an injection-molded part, in particular made of injection-molded plastic.

7. Electric motor drive (1) according to one of the preceding claims, wherein the housing (2) has viewing tabs (20) and / or screw holes (21) on two opposite sides, by which it is arranged to be screwed to the first support (14) of the seat and / or reclining furniture (1).

8. Electromotive drive (1) according to one of the preceding claims, wherein the first lever (9) is guided in the housing (2) such that, after the release of a positive locking with the first pull tab (7), it is arranged to pivot against a pulling direction of the pull tab (7), preferably until it rests or is approximately resting on the underside of the housing (2) substantially parallel to the underside.

9. Electromotive drive (1) according to one of the preceding claims, wherein the first threaded spindle (5) is configured to exert a tensile force on the first pull tab (7) and in particular on the first lever (9).

10. Electromotive drive (1) according to one of the preceding claims, wherein the first threaded spindle (5) is mounted in a rotationally fixed linearly movable manner and is coupled to the first pull tab (7) by means of a linearly movable first slide (24).

11. Electric motor drive (1) according to one of the preceding claims, wherein the first electric motor (3) is operatively connected to the first threaded spindle (5) via a first worm gear (18).

12. Electromotive drive (1) according to claim 11, wherein the first worm gear (18) engages with the first threaded spindle (5) via an internal thread.

13. Electric motor drive (1) according to one of the preceding claims, wherein the housing (2) has a first housing half and a second housing half which are screwed and / or snapped and / or glued together.

14. Electromotive drive (1) according to one of the preceding claims, wherein the housing (2) is arranged to guide the first lever (9) in a working area by means of a first guide surface (54) of the first housing half and a second guide surface (55) of the second housing half.

15. Electric motor drive (1) according to one of the preceding claims, wherein the housing (2) further a second electric motor (4) a second threaded spindle (6) and accommodates a second pivot axis (12) and wherein a second lever (11) is arranged to be pivoted relative to the housing (2) via the second pivot axis (12) by means of a second pull tab (8).

16. Electric motor drive (1) according to one of the preceding claims, wherein the housing (2) has a mounting surface (26, 28) at a first distal end, which is designed for mounting on or to a transverse structure (40) of the seating and / or reclining furniture (1).

17. Electric motor drive (1) according to claim 16, wherein the mounting surface (26, 28) is arranged to be positioned in the installation position against a horizontal and / or a vertical surface of the seating and / or reclining furniture (1) and in particular to be attached.

18. Electric motor drive (1) according to one of the preceding claims, wherein the housing (2) a length of 350 mm to 750 mm, in particular of 450 mm to 650 mm, preferably of 500 mm to 600 mm and / or a height of 35 mm to 120 mm, in particular of 45 mm to 100 mm, preferably of 55 mm to 90 mm and most preferably of 65 mm to 85 mm and / or a width of 25 mm to 65 mm, in particular of 35 mm to 55 mm, preferably of 40 mm to 50 mm exhibits.

19. Electromotive drive (1) according to one of the preceding claims, wherein a mounting plate (34) for attaching the first support part (15) is pivotably mounted on the first lever (9).

20. Electromotive drive (1) according to one of the preceding claims, wherein a roller (35) for guiding the second support part (16) is provided on the second lever (11).

21. Electromotive drive (1) according to one of the preceding claims, wherein the housing (2) has pivot axis receptacles at mutually distal regions which are arranged lower in the installation position relative to a region (42) of the housing (2) located between the pivot axis receptacles.

22. Seating and / or reclining furniture (10) comprising an electric motor drive (1) according to one of the preceding claims.

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