Folding device for transporting goods

Abstract

To realize a module type replaceable transport unit, height adjustment of the transport unit, removal of the transport unit, and automatic reduction of a chassis into the smallest folding size without disassembly.SOLUTION: A folding device for transporting goods includes: a first platform; a second platform; and a lift having a plurality of folding crossing portions rotatably coupled to the first platform and the second platform. Each of the plurality of folding crossing portions includes a first long arm, a second long arm and a short arm. The first long arm is fixedly connected to the second long arm.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a fully foldable and infinitely height-adjustable chassis that, depending on the accessories, can serve as a stroller, a transport dolly or the basis for a transport trailer with various uses. [Background technology]

[0002] Baby strollers have been known for a long time from the state of the art. A common problem is the space required when not in use (folded size). In particular, baby strollers need to be folded as small as possible when transporting them. However, even robustly constructed baby strollers cannot be folded into the smallest possible compact rectangular shape. This makes it difficult to store them, for example, in the trunk of a car, stacked with other suitcase-type luggage. Furthermore, such baby strollers require a large storage space.

[0003] In the case of known folding strollers, the typical folding method leaves one of the two distances between the wheels, either longitudinal or lateral, remaining after folding, which has a decisive effect on the folding volume. Strollers with particularly small folded sizes have a particularly large number of joints and moving parts, so this is achieved at the expense of robustness and design. Many purely mechanical strollers are difficult to handle, especially when converting from a running position to a carrying position. At least one of the two operations, fully opening or folding the stroller frame, must be performed manually, which is more cumbersome than strollers that can be opened only by operating a lift and automatically folded by pressing a button. It is desirable for the user to fold the stroller frame as easily as possible.

[0004] Robustly constructed strollers often require disassembly of individual components, usually the wheels, before they can be fully folded. This disassembly takes additional time. Having to disassemble dirty wheels can pose hygiene issues, for example, if the wheels come into contact with hands or the stroller's fabric cover.

[0005] Known strollers can be folded only without the stroller accessories and mattress, and only if the presence or absence of these is not a personal choice. Therefore, the stroller accessories must be removed before folding, even if the stroller accessories are actually to be stored together with the car body. Because the stroller accessories cannot be folded, they require a lot of storage space, especially when there is no need to carry a child in the stroller at all, such as when traveling by car.

[0006] Known strollers must be carried in their folded state and cannot be moved side-by-side like a carry-on bag. The weight of a folded stroller can be significant over long distances. Stroller accessories must be transported separately. This increases the amount of bulky and heavy luggage that must be carried, especially when traveling.

[0007] Known strollers do not allow the track width to be widened or narrowed as needed, so that users cannot choose to widen the track width to improve stability on uneven ground or when the center of gravity is high, or narrow the track width to improve maneuverability in cramped situations, such as in crowds or public transport aisles.

[0008] In known folding strollers, the chassis typically has two large, non-swivel rear wheels and two small swivel front wheels connected to each other via a transverse axis, or two large, non-swivel wheels at the front and rear. None of the known strollers have four large wheels of the same size, all of which can rotate 360° or lock in pairs as needed. As a result, maneuverability cannot be optimized for a given situation, such as in very cramped situations (restaurants, supermarkets, crowded areas, etc.), and maximum maneuverability cannot be achieved. When the direction of travel is changed, the known strollers require the seating or lying device to be disassembled, rotated 180°, and reassembled to change or maintain the driving behavior or maneuverability.

[0009] The suspension of known strollers, if present, is typically externally mounted as a movable part, which adds bulk and weight, is unsightly due to visibility, and is subject to wear with increased stroller use.

[0010] In the only known folding strollers currently on the market with height-adjustable lying or seating surfaces, the difference in height between the lowest and highest positions is a maximum of 20 cm. Therefore, even in the highest position, the lying or seating device is still too low, especially for tall parents. Meanwhile, in the lowest position, the lying position is still too high, preventing seated parents from making eye contact with their child. In particular, children who can already walk are unable to get in and out of the seating device on their own and must always be carried in and out. Height-adjustable strollers lack counterpressure to partially offset the child's weight, making height adjustment extremely difficult or impossible when the child is sitting or lying down in the stroller. Furthermore, height adjustment always requires the child to be removed from the stroller before height adjustment is possible. Due to their design, known chassis do not allow for versatile and modular functional conversion from a stroller to other transportable luggage vehicles, such as, for example, a shopping cart, a buggy or a tool trolley.

[0011] Known transport vehicles do not simultaneously offer the following possibilities: modular and interchangeable transport units, height adjustment of the transport units, removal of the transport units and automatic reduction of the chassis to a minimum folded size without disassembly. Therefore, there is a need for an apparatus that overcomes the above problems. These problems are solved by the load carrying apparatus according to the present disclosure.

[0012] The chassis of the luggage carrier has a minimum folded size as a stroller with or without a reclining or sitting device, a sunshade, a mattress, and a storage device. The folded size, in the case of a stroller with or without a reclining or sitting device, can be a rectangular parallelepiped shape, allowing it to be stacked and stored with other luggage, like a small suitcase, e.g., a carry-on suitcase. In this case, components, particularly wheels, do not need to be disassembled to achieve the minimum folded size.

[0013] The folding device, with or without the lying or sitting positioning device, can be carried by a push handle like a carry bag or can be placed freestanding. The design allows the track width of the device to be changed as needed, for example, widening the track width can improve running stability on uneven ground. The chassis can be equipped with four large wheels of the same diameter at the user's discretion, which can be locked at the user's discretion or at least one pair can swivel completely freely.

[0014] The device can further have a minimum folded size and weight due to the possibility of integrating a suspension and / or lift of the support structure of its chassis. The chassis can be opened automatically by operating the height adjustment and folded purely mechanically or electromechanically by pressing a button.

[0015] Lying, sitting or multi-function accessories can be connected to the device, including accessories such as sunshades, mattresses or storage devices, which can be connected to the chassis, thereby achieving a minimal folded size. Summary of the Invention [Problem to be solved by the invention]

[0016] The invention is defined by the independent claims, which define advantageous embodiments. [Means for solving the problem]

[0017] According to a first embodiment, a folding apparatus for transporting loads includes a first platform: a chassis having a plurality of jibs and a plurality of wheels, each of the plurality of jibs rotatably coupled to the first platform and at least one of the plurality of wheels; an apparatus for aligning the plurality of jibs and the plurality of wheels configured to rotate each of the plurality of jibs and each of the plurality of wheels at least through a respective rotation angle between an open state and a folded state, the apparatus including the plurality of jibs and the plurality of wheels disposed below the first platform in a folded state.

[0018] According to a second embodiment, the folding device according to the first embodiment comprises a lift, the lift comprising a plurality of folding intersections, each of the plurality of folding intersections being rotatably connected to a first platform. According to the third embodiment, each of the plurality of folding cross sections of the second embodiment comprises a first long arm, a second long arm and a short arm, the first long arm being foldable and the short arm being rotatably connected to the second long arm. According to a fourth embodiment, the folding device according to the second or third embodiment further comprises a second platform, which is connected to the lift so as to be able to rise and fall.

[0019] According to the fifth embodiment, the second platform according to the fourth embodiment includes a plurality of guide rails, and the second long arm of each of the plurality of folding intersections is rotatably connected to at least one of the plurality of guide rails. According to the sixth embodiment, each of the plurality of guide rails according to the fifth embodiment includes a carriage for raising and lowering the lift. According to the seventh embodiment, the second platform according to any one of the fourth to sixth embodiments is provided with a cable system for raising and lowering the lift.

[0020] According to an eighth embodiment, the second platform according to any of the third to seventh embodiments further comprises a plurality of gas springs for raising and lowering the lift, the gas springs being configured to resiliently lock the lift. According to the ninth embodiment, the second platform according to any one of the third to eighth embodiments further comprises a plurality of control elements or actuators for raising and lowering the lift.

[0021] According to a tenth embodiment, the foldable device according to any one of the second to ninth embodiments further comprises a foldable attachment, the foldable attachment being configured to couple with the second platform. According to the eleventh embodiment, the foldable attachment according to the tenth embodiment surrounds the folding device in a U-shape when in the folded state. According to the twelfth embodiment, the foldable device according to any one of the first to eleventh embodiments has a rectangular parallelepiped shape in the folded state. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is a general perspective view of an exemplary embodiment of a device for transporting loads with a seat in an open position. [Figure 2] FIG. 2 is a general perspective view of an exemplary embodiment of a device for transporting loads with a seat in a folded position. [Figure 3] FIG. 3 shows three scale views (side view A; top view (from above) B; bottom view (from below) C) of an exemplary embodiment of the chassis in an open position, with the lower platform, lift and upper platform, and steering handle connected. [Figure 4] FIG. 4 shows three scale views (side view A; bottom view (from below) B; front / rear view C) of an exemplary embodiment of the chassis in a fully folded state, connected with the lower platform, lift and upper platform, and steering handle. [Figure 5] FIG. 5 shows three exemplary diagrammatic embodiments of the connection of the jib swivel joint, which are connected by a cable hoist with catch (Plan A), a linkage (Plan B) and a belt (Plan C). [Figure 6] FIG. 6 is a perspective view of an exemplary embodiment of the lift in an open position coupled to a lower platform and an upper platform. [Figure 7] FIG. 7 is a scaled front or rear view (A) and a scaled bottom view (from below) B) of an exemplary embodiment of the lift in the open position, coupled with the upper platform. [Figure 8] FIG. 8 shows a scaled front or rear view (A) and a scaled bottom view (from below) B) of an exemplary embodiment of the lift according to FIG. 6 in the folded state, connected to the upper platform. [Figure 9]FIG. 9 is a perspective view of an exemplary mechanism for infinitely raising and lowering and locking of an exemplary embodiment of the lift in an open position, coupled with the lower and upper platforms. [Figure 10] FIG. 10 is a schematic diagram of the mechanical connection between the lift, lower platform and undercarriage jib in a folded position (illustration A, lift and undercarriage folded) and an open position (illustration B, lift and undercarriage opened) according to an exemplary embodiment. [Figure 11] FIG. 11 is a schematic diagram of the mechanical connection between the lift, lower platform, and undercarriage jib during transition from an open position (A, lift and undercarriage open) to a folded position (B, lift and undercarriage folded) according to an exemplary embodiment. [Figure 12] FIG. 12 shows three perspective views of an exemplary embodiment of the mechanical connection between the lower platform and the jib and the mechanical connection between the jib and the steering fork. [Figure 13] FIG. 13 is a general perspective view of an exemplary embodiment of a foldable three-section reclining device in an open position (View A, without canopy) and a folded position (View B, with canopy). [Figure 14] FIG. 14 is a general perspective view of an exemplary embodiment of a foldable three-piece seating unit in an open position (View A, without canopy) and a folded position (View B, with canopy). [Figure 15] FIG. 15 is a general perspective view of an exemplary embodiment of a foldable three-section multifunction platform in an open and folded position. DETAILED DESCRIPTION OF THE INVENTION

[0023] The dimensions shown in the figures, the resulting proportions of the respective elements, and their relative placement may be chosen differently in other embodiments without departing from the scope of the present disclosure.

[0024] 5.1 Stroller with reclining position 5.1.1 Opened state - perspective view 1 is a general perspective view of an exemplary embodiment of an apparatus 1000 for transporting loads, with a seat in an open position. The folding apparatus 1000 includes a chassis 1100, a lower platform 1200, a lift 1300, an upper platform 1400, an attachment 1500, such as a reclining, sitting, or multifunction platform, and a steering wheel 1600. The individual assemblies 1100 to 1600, their connections, and their interactions when opening, folding, adjusting, and locking the individual assemblies 1100 to 1600 or the entire apparatus 1000, are described in detail below with reference to the figures. The apparatus 1000 is designed to be modular and can be configured according to one's choice for transporting children or transporting items.

[0025] 5.1.2 Folded state - perspective view FIG. 2 shows the device shown in the folded state 2000 of FIG. 1. The device can be moved from the unfolded state (see FIG. 1) to the folded state 2000 in any operating position (lying, sitting, multi-function platform, etc.) with or without its accessories (e.g., sunshade or mattress, etc. (not shown)) and without disassembly of the individual components. In the folded state 2000, the device can be shaped like a rectangular parallelepiped, thereby having a minimal folded size. Folding of the chassis 2100 from the unfolded state (see FIG. 1) to the folded state 2000 can be performed automatically and purely mechanically "at the push of a button," as will be described in detail with reference to the following figures.

[0026] In the folded state 2000, the device can be transported by rolling it on the ground on parallel wheels arranged below the lower platform 2200 of the chassis 2100, comparable to a carry-on bag. The grip of the steering handle 2600 can be telescopically lengthened or shortened in this case. By telescopically shortening the steering handle 2600, the device 2000 can be lifted in the folded state, for example, for storage. Due to its rectangular parallelepiped shape, the device in the folded state 2000, with or without the attachment 2500, can be stacked in a space-saving manner with other rectangular parallelepiped-shaped luggage, for example, suitcases.

[0027] The folded size of this device in the folded state 2000, without the accessory part 2500 (base frame), meets the recommended standard of the International Air Transport Association (IATA), which states that the sum of the length, width and height of baggage must not exceed 115 cm.

[0028] 5.2 Device without accessories (base frame) 5.2.1 Opened state - scale drawing 3 shows three scale views of an exemplary embodiment of the chassis 3100 in the open position (apparatus 1000 of FIG. 1 without attachments / base frame) coupled with the lower platform 3200, lift 3300, and upper platform 3400, as well as the steering wheel 3600. In the open position, the height of the upper platform 3400 relative to the lower platform 3200 is adjusted by operating the lift 3300, for example, via a control element attached to the side of the upper platform 3400, and can be elastically or rigidly locked. The height can be adjusted between a minimum of 0 cm and a maximum of 35 cm. In other embodiments, other minimum and maximum heights are possible depending on the specific application of the apparatus. The height can be continuously adjusted.

[0029] The steering wheel 3600 further includes a handle grip 3610 fixedly connected to two telescoping arms 3620. Each of the two telescoping arms 3620 includes an upper sub-arm that can be telescopically extended and locked from a lower sub-arm, allowing the length of the steering wheel 3600 to be changed, for example to accommodate different user sizes.

[0030] The lower ends of the lower sub-arms of the steering handle 3600 are rotatably and slidably connected to the lower platform 3200 via pivot shafts 3240. The pivot shafts 3240 allow the angle of the steering handle 3600 relative to the lower platform 3200 to be changed. The steering handle 3600 can be locked at any angle relative to the lower platform 3200. By changing the angle, the steering handle 3600 can be adjusted to fit the size of the user or to suit the direction or method of movement without aligning any accessories. This also avoids the need to rotate the steering handle 3600 180° when, for example, eye contact with a child in a lying or sitting position is to be possible.

[0031] Below the lower platform 3200 (see FIG. 3C), four lockable jibs 3110 are rotatably connected at their ends to the lower platform by jib pivots 3140. In one embodiment, the lockable jibs 3110 form the same angle α=β with respect to the lower platform 3200 when in the open position. The angle α can be greater than or equal to 90°. Varying the angle can change the track width. In another embodiment, the lockable jibs 3110 form a pair of different angles α≠β with respect to the lower platform 3200.

[0032] At their outer ends, four lockable jibs 3110 are connected to steering forks 3120, each of which is connected to a wheel 3130. The diameter of the wheels can be different in pairs, for example, front and rear. The steering forks 3120 can be freely rotated 360° or can be locked in pairs, for example, front and rear, in a column direction, so that the driving behavior of the chassis can be adjusted in any direction of travel. The steering forks 3120 can be bent about their vertical longitudinal axis, so that the wheels 3130, when free to move, are automatically aligned in the direction of travel (Nachhaläuf).

[0033] 5.2.2 Folded state - scale drawing 4 is a three-scale drawing of an exemplary embodiment of the chassis 4100 in a fully folded position (apparatus 2000 of FIG. 2 without attachments / base frame) connected to a lower platform 4200, a lift 4300, and an upper platform 4400, and a steering handle 4600. In the fully folded position, the pair of jibs 4110 are rotated to their full extent on the wider sides of the lower platform 4200. In the fully folded position, the pair can be aligned as mirror images, as in FIG. 4B. Locking the jib 4110 is also possible in this position.

[0034] The steering forks 4120 of the two inboard jibs 4110 and the two outboard jibs 4110, respectively, are pointed outward towards the narrower sides of the lower platform 4200, thereby maximizing the distance between the contact points of the inboard and outboard wheels 4130 in order to give the highest possible stability to the folded chassis 4100. The steering forks can both be pointed inward, or in pairs, pointing inward or outward.

[0035] The steering forks 4120 can be locked in line parallel to the broad sides of the lower platform 4200 so that the chassis 4100 folded into the steering handle 4600 can also be rolled on the ground like a carry bag. Locking the jib 4110 in other positions is also possible.

[0036] To achieve the minimum packaging dimensions of the base frame (apparatus 2000 of FIG. 2 without attachments), the height of the upper platform 4400 relative to the lower platform 4200 can be changed by manipulating the lift 4300 so that the upper platform 4400 is positioned directly on the lower platform 4200. The upper platform 4400, the lift 4300, or the lower platform can be locked in this position or another position.

[0037] In the fully folded state, the two vertically oriented upper sub-arms of the steering handle 4600 are pushed into or onto the lower sub-arms to their full extent. The upper sub-arms can be locked in this position or another position. The telescopically shortened steering handle 4600 can be lowered via the pivot shaft 4210 until the lower ends of the lower sub-arms are above the ground. The lower ends of the lower sub-arms can be equipped with ball casters to increase the stability of the chassis 4100 when folded or in the folded state.

[0038] 5.2.3 Jib connection FIG. 5 shows three exemplary schematic embodiments of the jib pivot axis 5140 connection, including a cable hoist with catch (Plan View A), a linkage (Plan View B), and a belt (Plan View C). The jibs 5110 are interconnected to move sequentially at set intervals during automatic opening, closing, and folding of the chassis, so that the jib 5110, steering forks, and wheels (not shown) do not lock together and the chassis remains balanced during automatic opening, closing, and folding. The connection and coordinated time delay of the jib 5110 movement can be achieved, for example, by ropes with appropriately positioned drivers (Figure A), linkages with different levers (Figure B), or toothed belts and non-circular toothed belt wheels (Figure C), or by a combination of these. In other embodiments, the jib 5110 can alternatively or additionally be moved or controlled electromechanically, for example, by actuators.

[0039] 5.3 Assembly Lift (without chassis) 5.3.1 Opened state - perspective view FIG. 6 is a perspective view of an exemplary embodiment of a lift 6300 coupled to a lower 6200 platform and an upper 6400 platform in an open position. The lift 6300 is coupled to the lower 6200 platform and the upper 6400 platform. In the illustrated embodiment, the lift includes two intersections 6310. In other embodiments, the lift 6300 can include multiple intersections 6310. The intersections 6310 are each at least partially rotatably coupled to the lower platform and / or the upper platform. Each illustrated intersection includes a first long arm 6311, a second long arm 6312, and a short arm 6313. The first long arm 6311 is foldable. The first long arm 6311 includes a first portion fixedly connected to a first portion of the second long arm 6312. The second portion of the first long arm 6311 is rotatably coupled to the first portion of the first long arm 6311.

[0040] The length of the second portion of the first long arm 6311 is substantially equal to the length of the short arm 6313. The short arm 6313 is rotatably coupled to the second long arm 6312. The second long arm 6312 includes a first portion and a second portion. The length of the second portion of the second long arm 6312 is substantially equal to the length of the short arm 6313 or the length of the second portion of the first long arm 6311. The first long arm 6311 and the short arm 6313 are coupled to the lower platform 6200 and the upper platform 6400 at their ends, respectively. The second long arm 6312 is coupled to a guide rail 6410 of the upper platform 6400 and is movable along the guide rail 6410. The second long arm 6312 of the first intersection 6310 and the second long arm 6312 of the second intersection 6310 can be coupled to the same guide rail 6410 or each can be coupled to a different guide rail 6410.

[0041] The guide rail 6410 extends across the width of the upper platform 6400 in a direction substantially perpendicular to the push or pull direction of the device for transporting loads. In a preferred embodiment, the guide rail 6410 is substantially centered relative to the length perpendicular to the width of the upper platform 6400 to ensure stability of the lift under load. However, other arrangements of the guide rail 6410 are also possible. The upper platform 6400 may include multiple guide rails of different lengths located in different regions of the upper platform 6400. In the illustrated embodiment, the guide rail 6410 is substantially the same length as the first long arm 6311 or the second long arm 6312, and substantially twice the length of the short arm 6313. However, other length ratios are possible.

[0042] 5.3.2 Opened state - scale drawing 7A and 7B are a scaled front or rear view and a scaled bottom view (from below) of an exemplary embodiment of the lift 7300 according to FIG. 6 in an open position, connected to an upper platform 7400. The lift 7300 includes two intersections 7310, each including a first long arm 7311 and a second long arm 7312 and a short arm 7313. The short arm 7313 is connected to the second long arm 7312 and the upper platform 7400. The short arm 7313 forms an angle γ with the second long arm 7312. Using a single guide rail rotatably connected to the two long arms 7312 of each intersection 7310, the angle γ is approximately 45° in the fully open position. Using multiple guide rails, each rotatably coupled to the long arm 7312, the angle γ in the fully open position can be less than or equal to about 45°, for example, 0°<γ<45°, 10°<γ<35°, or 20°<γ<25°.

[0043] To adjust the height of the lift, the connection of the short arm 7313 to the upper platform 7400 is fixed relative to the upper platform 7400, thereby decreasing (raising) or increasing (lowering) the angle γ, while the connection of the second long arm 7312 to the upper platform 7400 is displaced in the opposite direction along the common or respective guide rails, away from the connection of the short arm 7313. As described in more detail below with reference to FIG. 9 , the height of the lift 7300 is continuously adjustable between the folded and unfolded positions and can be locked at any height. In the illustrated embodiment, the maximum height of the lift 7300 in the fully unfolded position is substantially equal to the length of the first long arm 7311 or the second long arm 7312.

[0044] The first long arm 7311 of each intersection 7310 is foldable. The first long arm 7311 includes a first portion fixedly connected to a first portion of the second long arm 7312 and a (foldable) second portion rotatably coupled to the first portion of the first long arm 7311. The second portion is rotatably coupled to the upper platform 7400 at an end opposite the connection to the first portion at the first end of the upper platform 7400. The first portion is rotatably coupled to the lower platform at a first end (not shown, see e.g., item 6200 in FIG. 6) opposite the connection to the second portion. The first ends of the lower platform and upper platform 7400 substantially overlap in the illustrated scale view (from below) (B). However, each of the first and second portions of the first long arm 7311 may be coupled to the lower or upper platform 7400 in other areas of the lower or upper platform 7400 to optimize the stability of the structure with respect to the action of external forces, if necessary.

[0045] The second long arm 7312 is rotatably coupled at one end to the second end of the lower platform (not shown, see e.g., reference numeral 6200 in FIG. 6 ) and at the other end of the second long arm 7312 to the upper platform 7400 or the guide rail 7410, respectively. The short arm 7313 is coupled to the upper platform 7400 at the second end of the upper platform 7400. The second ends of the lower platform and the upper platform 7400 substantially overlap in the scale view (from below) (B). However, the second long arm 7312 can be coupled to the lower platform or the upper platform 7400 in other regions of the lower platform 7400, for example, at a peripheral edge of the lower platform 7400.

[0046] The second long arm 7312 of each chassis 7310 includes a first portion and a second portion. The first arm 7311 and the first portion of the second arm 7312 form a single unit. The unit includes a recess so that, when adjusting the height of the lift 7300, the second portion of the second long arm 7312 of the second intersection portion 7310, which together with the first intersection portion 7310 form at least part of the lift 7300, can engage with the recess of the unit of the opposite intersection portion 7310. The recess is configured so that the lower platform and the upper platform 7400 directly or nearly directly overlap each other when the lift 7300 is in the folded position.

[0047] The two intersections 7310 are arranged and designed to be point-symmetric relative to one another in the illustrated scale view (from below) (B). Spatially, the two intersections 7310 are arranged symmetrically about the axis of rotation (180° rotation). This, for example, can reduce manufacturing costs and increase the degree of isotropy of the stability of the structure, for example, with respect to rotational, translational, compressive, and tensile forces. In other embodiments where the lift 7300 comprises multiple intersections 7310, the intersections 7300 are arranged in pairs as appropriate.

[0048] 5.3.3 Folded state - scale drawing Figure 8 shows a front or rear view (A) and a scale drawing (bottom view (from below)) (B) of an exemplary embodiment of the lift 8300 according to Figure 6 in a folded state, connected to an upper platform 8400. The intersecting portion 8310 interlocks with the upper platform 8400 in the folded state (see Figure 7), so that the lower platform (not shown) and the upper platform 8400 substantially overlap each other (see Figure 4C).

[0049] 5.4 Connection Detail - Lift - Upper Platform - Perspective View In the illustrated embodiment, the upper platform 9400 includes a mechanism for infinitely raising and lowering and locking the lift. The mechanism includes a lockable gas spring 9420 that can counteract forces acting on the lift. In other embodiments, the mechanism can include multiple other or alternative components that assist in raising or lowering the lift. For example, the mechanism can include multiple gas springs 9420. The gas spring 9420 can further include a plunger 9421 and a cylinder 9422. In an exemplary embodiment, the cylinder 9422 is fixedly coupled to the upper platform 9400, while the plunger 9421 is movable along the cylinder axis. The mechanism also includes a trigger system 9430 with multiple control elements 9431. In an exemplary embodiment, the trigger system 9430 can include only one, two, or three control elements 9431. The plunger 9421 can lock the lift or raise or lower the lift by operating one or more of the multiple control elements 9431 using the trigger system 9430.

[0050] In the illustrated embodiment, the mechanism includes two guide rails 9410. Each guide rail 9410 includes a carriage 9411. In other embodiments, each guide rail 9410 can include multiple carriages 9411. Each carriage 9411 is rotatably coupled to a second long arm (see, for example, reference number 6312 in FIG. 6). In the illustrated embodiment, the mechanism further includes a pulley system 9440. The carriages 9411 are coupled to a gas spring 9420 via the pulley system 9440. Similarly, the carriages 9411 are coupled to each other by the pulley system 9440. In other embodiments, the carriage 9430 can be coupled to multiple components that assist in raising and lowering the lift via corresponding pulley systems. Other couplings, such as belts or linkages, are also possible.

[0051] In the illustrated embodiment, the carriages 9411 move linearly, synchronously, and in opposite directions between the first and second ends of the guide rails 9410, thereby varying the angle γ (see FIGS. 6 and 7 and the accompanying description). The synchronized counter-rotational movement of the carriages 9430 maintains the upper platform 9400 in a stable horizontal position relative to the lower platform 9200, substantially parallel to the lower platform 9200.

[0052] In the illustrated embodiment, the pulley system 9440 forms a sheave via a movable (deflecting) roll 9441, which doubles the stroke path of the plunger 9421. For this purpose, the head of the plunger 9421 includes two movable rolls 9441, one above the other, aligned horizontally relative to the upper platform 9400. Two first rolls 9442, fixed relative to the upper platform 9400 and arranged horizontally, are attached to the upper platform 9400 at opposite end regions of the upper platform 9400. The pulley system 9440 can include one or more ropes. In the illustrated embodiment, the pulley system 9440 includes two first ropes, each fixed to the upper platform 9400 at a first end in an opposite end region. The two first ropes are substantially the same length and run in substantially mirror image fashion from their respective fixations to the upper platform 9400, via movable rolls 9441, to respective carriages 9411 to which the ropes are respectively fixed at their second ends. By deflecting the heads of the plungers 9421, the carriages 9411 are pulled in opposite directions with half the force of the gas springs 9420, but move twice the distance in each opposite direction.

[0053] In the illustrated embodiment, the pulley system 9440 further comprises two second cables to ensure synchronized counter-rotational movement of the carriages 9411. The two second cables are connected to the two carriages 9411, for example, via two second pulleys 9443 arranged fixedly and horizontally aligned with respect to the upper platform 9400 at each end region of the guide rail 9410. In the illustrated embodiment, the two second cables are substantially equal in length and form a closed shape with the carriages 9430.

[0054] The pulley system 9440 can also include toothed belts, linkages, non-circular wheels, etc. in combination with ropes or other means capable of transmitting force to the intersections of the lift (see, for example, FIG. 6). By actuating at least one control element 9431 of the trigger system 9430, the plunger 9421 is unlocked during actuation, allowing the lift to be infinitely adjustable in height.

[0055] Once the actuation of the control element 9431 is complete, the plunger 9421 is locked again, thereby locking the carriage 9431 coupled via the pulley system 9440 and the cross section of the lift connected to the carriage (see, for example, reference numeral 6310 in FIG. 6) in their respective positions. The plunger 9421 of the gas spring 9420 can be elastically locked in the corresponding position. This allows the lift to be equipped with a suspension in its overall design to mitigate, for example, vibrations in the undercarriage caused by the movement of a small child or sudden changes in the load weight of the lift.

[0056] In other embodiments, the design may include additional or alternative suspension systems for suspending individual areas or the entire lift. The suspension systems may be integrated into one or more of the components during assembly of the device for transporting loads, for example, in the form of tension or torsion spring elements, such as those integrated into the pulley system 9440 or gas spring 9420.

[0057] In yet another embodiment, locking the lift may additionally or alternatively comprise locking the carriage 9430 relative to the guide rail 9410, for example by means of a latch or clamp. By actuating at least one corresponding control element via a corresponding trigger system, the carriage 9430 can be unlocked during operation, so that the lift can be adjusted in height in an infinite or at least fine increments.

[0058] In alternative embodiments, the lift may alternatively or additionally be regulated or controlled electronically, for example by an actuator or controller. Furthermore, a weight-countering bias or shear force on the lift may be provided, for example, by a bias suspension on the lower platform 9200 or upper platform 9400, to assist in regulating the lift as it rises and falls.

[0059] 5.5 Schematic diagram of the connection Lift - Lower platform - Undercarriage 5.5.1 Transition from collapsed to unfolded state 10 is a schematic diagram of the mechanical connection between the lift (not shown, see e.g., FIGS. 6, 7, and 8), the lower platform, and the jib of the undercarriage in a folded (illustration A, lift and undercarriage folded) and opened (illustration B, lift and undercarriage opened) position according to an exemplary embodiment. In the folded position, the lift (only one of the lift intersections 10310 is shown for ease of illustration) is locked in its lowest position, and the jib (only one of the jibs 10110 is shown for ease of illustration) is folded under the lower platform.

[0060] In an exemplary embodiment, the intersection 10310 is coupled to an energy storage device, such as a gas spring 10235, via a bell crank 10314. The bell crank 10314 is rotatable about a pivot point 10315, for example, about the intersection's 10310 connection with the lower platform.

[0061] The gas spring 10235 is connected to the steering 10220 and includes a movement clearance 10221 extending radially from the center of the steering 10220 and divided by a steering pawl 10222. In the folded state, the steering 10220 is locked in a first position (folded legs) by a locking device, for example a locking pin 10223. The steering 10220 is connected to the jib 10110 via a rope 10210. The steering 10220 and the jib(s) 10110, as well as the jibs themselves, may also be connected by one or more belts, linkages, and other mechanical connections (see FIG. 5).

[0062] An energy storage device, for example, an extension spring 10231, is fixedly connected to a driver 10232 that is loosely (slidably) connected to the rope 10210. The driver 10232 on the extension spring 10231 allows the driver 10212 on the extension spring 10231, which is fixedly connected to the rope 10210, to slide. This allows the rope 10210 to move in the pulling direction of the extension spring 10231, for example, when the driver 10212, which is fixedly connected to the rope 10210, is in the pulling path of the slidable driver 10232 on the extension spring 10231. Conversely, if the extension spring 10231 is pulled in the direction opposite to its tension, the extension spring 10231 and the rope 10210 can be decoupled from each other.

[0063] In the folded state of the base frame (when the jib 10110 and the lift are folded), the tension spring 10231 can be locked, for example, by the tension spring claw 10233. The energy stored therein can correspond to the maximum storage capacity of the power storage device. The tension spring 10231 can be tensioned by moving the cross section 10310 of the lift to its lowest position. The tension spring 10231 can be tensioned via a bell crank 10314, which is connected to the relaxed tension spring 10231 via a Bowden cable 10234. The tension spring claw 10233 can hold the tensioned tension spring 10231 in a tensioned position. When the tension spring 10231 is held by the tension spring claw 10233, the tension spring is disconnected from the lift, allowing the lift to move freely.

[0064] The lift can be moved to its highest position while the tension spring 10231 is tensioned and held by the tension spring pawl 10233. This gives the Bowden cable 10234 slack 10211, allowing the tensioned tension spring 10231 to release its stored energy when the tension spring pawl 10233 releases the tension spring 10231. The slack disappears when the tensioned tension spring 10231 releases its stored energy and the intersection 10310 of the tension spring 10231 and the lift is reconnected via the Bowden cable 10234.

[0065] The energy required to open the chassis is provided by a gas spring (not shown, see FIG. 9, item 9420). When the lift is pushed down to its lowest position, energy can be stored in one or more lockable gas springs on the upper platform. The gas springs can be activated via a control element (not shown), which can be attached, for example, to the handle grip or to the side of the upper platform (not shown).

[0066] When the lift opens, only a portion of the energy stored in the gas spring on the upper platform is consumed, which acts on the angle of the lift intersection, changing the angle of the bell crank 10314 via the pivot point 10315. This transfers the energy of the gas spring on the upper platform to an energy storage device, for example the gas spring 10235 on the lower platform, by compressing it between the bell crank 10314 and the steering pawl 10222 of the steering 11220, which can be locked by the locking pin 11223.

[0067] The chassis can be opened "at the touch of a button" by operating a control element (not shown), e.g., via a WLAN signal. Activation of the control element releases a locking pin 10223, e.g., by a solenoid (not shown), thereby unlocking the steering 10220 and allowing a compressed gas spring 10235 to move the steering 10220 by pushing on the steering pawl 10222. In this case, the steering 10220 is rotated from a first position (legs folded) to a second position (legs extended). A rope 10210 connected to the steering 10220 transmits the rotational movement so that the jib 10110 unfolds.

[0068] The deployment of said jibs 10110 is delayed in time so that they do not obstruct each other when deployed and the chassis remains stable and does not tip (see FIG. 5). The time delay can be achieved by ropes 10210 as described herein and appropriately positioned drivers (not shown). Alternatively or additionally, the time delay can be achieved by connecting the jibs 10110 together independent of the ropes 10210 (see FIG. 5), or by a combination of the above exemplary embodiments.

[0069] The locking pin 10223 can automatically lock the steering 10220 in the second position (open legs). Locking the steering 10220 can also lock the jib 10110, which is connected via the rope 10210, in the open position. Locking the jib 10110 in the open position can be done alternatively or additionally and can be done separately and independently from the connection with the steering 10220 as described herein.

[0070] In other embodiments, the mechanical linkage may alternatively or additionally comprise more than one of the indicated components, such as, for example, another rope, a linkage, a toothed belt, a non-circular wheel, an energy storage device, or a locking device.

[0071] 5.5.2 Transition from Open to Collapsed State FIG. 11 is a schematic diagram of the mechanical connection between the lift (not shown, see e.g., FIGS. 6, 7, and 8), the lower platform, and the jib of the undercarriage during transition from an open position (A, lift and undercarriage open) to a folded position (B, lift and undercarriage folded) according to an exemplary embodiment. The energy for automatically folding the chassis is provided by an intermediate energy storage device, for example, an extension coil spring 11231.

[0072] To automatically fold the chassis, the lift is moved to its highest position. Automatic folding of the chassis by "pressing a button" can be triggered by activating a control element (not shown), which simultaneously releases the locking pin 11223, unlocks the steering 11220, releases the steering pawl 11222, completely releases the travel play 11221 in the connection between the steering 11220 and the gas spring 11235, and releases the tension spring pawl 11233, releasing the tension spring 11231, via a solenoid (not shown), wirelessly activated, for example, via a WLAN signal. The released tension spring 11231 can transfer its stored energy via a driver 11232 on the tension spring 11231 to a driver 11212 on the rope 11210, thereby transferring its traction path to the rope 11210 moving counterclockwise. Multiple drivers can be connected to the rope 11220 to fold the jib 11110.

[0073] The deployment of said jibs 11110 is delayed in time so that they do not obstruct each other when deployed and the undercarriage always remains stable and does not tip (see Figure 5). The time delay can be achieved by ropes 11210 as described herein and appropriately positioned drivers (not shown). Alternatively or additionally, the time delay can be achieved by connecting the jibs 11110 to each other independent of the ropes 11210 (see Figure 5) or by a combination of the above exemplary embodiments.

[0074] When folding, the steering 11220 rotates from the second position (opened legs) to the first position (folded legs) and is automatically locked by the lock pin 11223. Furthermore, the contraction of the tension coil spring 11231 eliminates the play 11221 of the Bowden cable 11234, and the Bowden cable is unfolded.

[0075] To reconnect the lift and jib 11110 and reenergize the energy storage device required to automatically open and fold the undercarriage at the "push of a button," the lift is manually pushed down from its highest position to its lowest position, which stores energy in a lockable gas spring (not shown, see FIG. 9, item 9420) located on the upper platform.

[0076] When the lift is manually depressed from its highest position to its lowest position, the tension spring 11231 is tensioned by rotating a bell crank 11314 at the cross section 11310 of the lift which is connected to the tension spring 11231 via a Bowden cable 11234. Finally, the tensioned tension spring 11231 is held in tension by the tension spring pawl 11233.

[0077] When the lift is manually pushed down from the highest position to the lowest position, the rotation of the bell crank 11314 also retracts the gas spring 11235 into its folded position. At this position, the gas spring 11235 in the steering 11220 with its travel play is reconnected to the steering 11220 by the steering pawl 11222 behind the head of the piston rod of the gas spring 11235 dividing the travel play 11220 again, so that the lift and steering 11220 can be reconnected to each other.

[0078] The opening and folding of the chassis can be supplemented or replaced in whole or in part by electromechanical means. The opening and folding of the chassis can be realized only partially or without power assistance, and only partially or without coupling of the individual operating sequences.

[0079] 5.6 Lower Platform-Jib-Steering Fork-Perspective View 12 shows three perspective views of an exemplary embodiment of the mechanical connection between the lower platform 12200 and the jib 12110, and the mechanical connection between the jib 12110 and the steering forks 12120. When the chassis is folded, the steering forks 12120 can be automatically aligned to a predetermined end position (see FIG. 4). In the unfolded state of the chassis, the steering forks 12120, in pairs, can rotate freely 360° or can be locked in chassis alignment.

[0080] The two processes - the automatic alignment of the wheels when folding and the locking or unlocking of the pair of steering forks 12120 in the open position - can be controlled or operated, for example, by the mechanical connection between the rotary joint 12121 of the steering fork and the jib 12110 and the mechanical connection between the rotary joint 12140 of the jib and the lower platform 12200.

[0081] All steering forks 12120 can be fixedly connected to a vertical shaft 12122, which is fixedly connected to a toothed belt wheel 12123, which is connected via a toothed belt 12160 to a toothed belt wheel 12143, which is rotatably connected to the vertical shaft 12142 which is fixedly connected to the jib 12110 and rotatably connected to the lower platform 12200.

[0082] The steering fork 12120 and the wheels connected thereto are locked in pairs, for example, by actuating locking pins 12144 on toothed belt wheels 12143 by means of a solenoid (not shown), which can be operated by a control unit (not shown), for example, via WLAN. The activated locking pins 12144 can engage in pairs with the toothed belt wheels 12143 (see, for example, reference numeral 1100 in FIG. 1) as soon as the wheels (not shown) to be locked are correctly aligned by pushing the chassis forward or backward. The activated locking pins 12144 can lock the steering fork 12120 via the connected toothed belt 12160, thereby determining the wheel alignment.

[0083] By slightly tilting the forks while opening and folding the chassis, the wheels automatically align (Nachharauf) with the direction of travel of the Jib 12110, allowing it to roll on the ground at any time without dragging or blocking.

[0084] Just before the end of the rotational movement of the jib 12110, the wheels can be substantially perpendicular to the jib 12110 midway through the nachlauf. In their final position, the wheels can rotate approximately 90° relative to their previous direction of travel midway through the nachlauf, for example when folded parallel to the wider sides of the lower platform 12200 (see FIG. 4).

[0085] Automatic alignment of the steering fork 12120 when folding the undercarriage can be achieved, for example, by mechanically coupling the rotational movements at the rotary joint 12121 of the steering fork and the rotary joint 12140 of the jib. The rotational movement of the jib 12110 for opening and closing the undercarriage is initiated and controlled by a pinion 12141. The pinion 12141 can transmit the rotational movement to the jib 12110 via a vertical shaft 12142.

[0086] As the jib vertical shaft 12142 rotates during the closing operation, the slidable toothed wheel 12150, which is fixed non-rotatably to the lower platform 12200, is displaced towards the toothed belt pulley 12143 via a screw thread 12151. The slidable toothed wheel 12150 forms a pawl connection with the toothed belt wheel 12143: in the last third of the rotational movement during the closing operation of the jib 12110, the pawl of the slidable toothed wheel 12150 engages with the travel play 12145 of the toothed belt wheel 12143, connecting it and causing it to rotate. The rotational movement of the toothed belt wheel 12143 is transmitted to the steering fork 12120 via the connected toothed belt 12160, causing the wheel (not shown) to rotate to a predetermined end position (see Figure 4).

[0087] Through the tooth shape and / or number of teeth of the two toothed belt wheels 12123 and 12143, a constant or variable transmission ratio can be created between the two, which allows the choreography of the movement of the jib 12110 and the alignment of the wheels (not shown) to be optimized when folding the chassis. Deployment of the jib 12110 is performed in the reverse order and mode. In electromechanical variants, alternatively or additionally, the steering fork can be moved and controlled electrically, for example by a servo motor.

[0088] 5.7 Accessories (Sleep / Sitting / Multi-function Platform) 5.7.1 Supine position - perspective view FIG. 13 is a general perspective view of an exemplary embodiment of a foldable three-section reclining device 13500 in an open position (View A, without canopy) and a folded position (View B, with canopy). The support structure of the reclining device 13500 includes a foldable lower frame 13510 and a foldable upper frame 13530. The lower frame 13510 and the upper frame 13530 are connected by foldable side walls 13520. The foldable side walls 13520 may include two tensioning brackets 13521 and eight crossed tensioning wires 13523. The open reclining device 13500 is stable as an accessory and can be used alone. The reclining device 13500 can be connected to and disconnected from an upper platform (not shown, see, for example, 1400 in FIG. 1).

[0089] The lower frame 13510 and the upper frame 13530 are foldable and each include two side frame segments 13511 and 13531 and a central frame segment 13512 and 13532 . The upper central frame segment 13532 and the side frame segment 13531 are pivotally connected at their undersides by four spring hinges (not shown), allowing the side frame segment 13531 to change angle by 90° only from horizontal to vertical. The spring force of the spring hinges (not shown) counteracts the downward vertical angle of the side frame segment 13531 and assists in folding it up to the horizontal direction.

[0090] The lower central frame segment 131512 and the side frame segment 13511 are similarly pivotally connected at their tops by four spring hinges (not shown) so that the side frame segment 13511 can be angled 90° downward from the horizontal to the vertical and upward beyond the horizontal. The spring force of the spring hinge (not shown) counteracts the downward vertical angle of the horizontal frame segment 13511 and assists in folding it up horizontally.

[0091] The lower center frame segment 13512 and the side frame segment 13511 are additionally rotatably connected by four catch fittings 13514, which, like four spring hinges (not shown), allow the side frame segment 13511 to rotate 90 degrees only from horizontal to vertical. When the lower side frame segment 13511 is folded from vertical to horizontal, the latch fittings 13514 engage.

[0092] The ends of the lower central frame segment 13512 and side frame segments 131511 are shaped to provide an optically nearly seamless outward closure with blinds 13515 in the open horizontal position in the embodiment shown here.

[0093] The lower frame 13510 and upper frame 13530 are connected by two foldable tensioning brackets 13521 and crossed tensioning wires 13523. At the ends, upper side frame segments 13531 are rotatably connected at their undersides to their respective tensioning brackets 13521. A high-torque kick spring 13522 presses the tensioning brackets 13521 vertically downward against the lower side frame segments 13511, where it engages a locking lever (not shown).

[0094] Acting as a counter-move to the tensioning brackets 13521 are 4x2 crossed tensioning brackets 13523 between the upper central frame segment 13532 and the lower middle frame segment 13512, and between the upper side frame segment 13531 and the lower side frame segment 13511.

[0095] Above the lower frame 13510 is a three-piece bottom plate 13540. (The head section of the bottom plate floor 13541 has a flap 13542, which allows the three-piece mattress placed on the floor to be tilted so that the child can lie down in a semi-sitting position.) The flap 13542 is locked by a torque hinge 13543. The support bracket 13550 for the recumbent position 13500 is centrally rotatably connected to the upper central frame segment 13532 .

[0096] The retaining bracket is secured by two locking tongues on the underside of the ends of the retaining bracket, which can be hooked up to receiving locks on the top of the central upper frame segment. In the center of the retaining bracket is a control unit, which can be used to release the locking tongues and remove the retaining bracket. A possible solution would be to route the Bowden cable inside the retaining bracket between the control unit and the locking tongues.

[0097] The head of the upper frame segment has a neodymium permanent magnet embedded in the upper side, which allows the sunshade to be assembled in a reclining position. The side walls of the recumbent position are surrounded from the outside by textile material folded in origami. The origami folding method is a symmetrical, repeated, sliding mirror operation. When the upper frame is lowered onto the lower frame, the side walls of the tank are precisely folded vertically.

[0098] The underside of each of the two central lower frame segments has a locking tongue that allows the recumbent to dock into two receiving locks on the upper side of the upper platform. On both sides of the upper platform, operating units are fitted to release the locking tongues of the attachments, allowing the tub to be removed from the chassis.

[0099] To fold the reclining position from the open position, the tensioning brackets 13521 connected to the upper frame segments 13531 are manually unlocked by locking levers (not shown) below the lower frame segments 13511 (at the head and foot ends of the lower frame 13510) in order to manually press the upper frame 13530 vertically downward onto the lower frame 13510, whereupon the tensioning brackets 13521 are forced into a horizontal position against the force of the kick springs 13522 on the lower central frame segment 13512. For this purpose, the upper sides of the lower side frame segments 13511 are laterally recessed with grooves (not shown), along which the freely movable corners on the lower sides of the tensioning brackets 13521 slide when the reclining position 13500 is opened and folded.

[0100] The lower side frame segment 13511 is then bent upward at a sharp angle to toggle and release the locking hardware 13514 between the lower center frame segment 13512 and the side frame segment 14511. The entire bed, including the mattress (not shown) and awning 13560, can then be folded downward to a vertical position. The retaining bracket 13550, which is rotatably connected to the upper center frame segment 13532, is folded from vertical to horizontal. The folded reclining position 13500 surrounds a folded base frame (not shown, see FIG. 2), which can be folded together with the sunshade 13560.

[0101] To open the recumbent 13500 from its folded position, the lower and upper frame segments 13511, 13531 (the recumbent head and foot sections), which lie on top of each other, are first rotated 90° upward from their vertically folded positions to a horizontal position, where the locking hardware between the lower central frame segment 13512 and the side frame segments 13511 automatically engage, thereby maintaining the rigidity of the lower frame 13510.

[0102] The spring force of the spring hinges (not shown) between the lower frame segments 13511 and 13512 and the upper frame segments 13531 and 13532, as well as the spring force of the kick spring in the tensioning bracket 13521, causes the upper frame of the tub to automatically rise, pulling the side walls of the recumbent together. By briefly lifting the upper side frame segment 13531, the lower, movable end of the tensioning bracket 13521, which is aligned approximately vertically, engages with a locking lever (not shown) centrally attached to the inner lower outer end of the lower side frame segment 13511. By activating an actuation unit (not shown), the recumbent can be removed as needed.

[0103] 5.7.2 Sitting position - perspective view 14 is a general perspective view of an exemplary embodiment of a foldable three-piece seat 14700 in an open position (View A, without canopy) and a folded position (View B, with canopy). The support structure includes a three-piece frame. The three-piece frame includes a frame segment 14710 in the shape of a backrest and a frame segment 14730 in the shape of a leg rest rotatably connected to a central frame segment 14720 in the shape of a seat.

[0104] The retaining bracket 14750 is rotatably connected to the seat 14720. The retaining bracket is secured by two locking tongues on the underside of the ends of the retaining bracket, which can be secured to a receiving lock on the top of the center frame segment. In the center of the retaining bracket is a control unit, which can be used to release the locking tongues and remove the retaining bracket. A possible solution would be to route the Bowden cable inside the retaining bracket between the control unit and the locking tongues. The head section of the sports seats has a neodymium permanent magnet embedded in the upper part of the frame, which allows the sunshade to be attached. The fabric cover, for example, is woven three-dimensionally and is attached removably by a welting system.

[0105] The backrest 14710 and leg rest 14730 can be connected via a stretch cross mechanism 14740 for infinitely symmetrically or asymmetrically adjusting the tilt angle of the backrest 14710 and leg rest 14730. The stretch cross mechanism 14740 can be connected to a resilient blocking gas spring 14746 for locking the backrest 14710 and leg rest 14730. The stretch cross mechanism 14740 and gas spring 14746 can be connected together to the seat portion 14720.

[0106] A gas spring 14746 is rotatably connected to each of the left and right lever arms 14731 of the leg rest, or, as in the exemplary embodiment shown, each of the left and right lever arms 14711 of the back rest. The lever arms are extensions of the frame segments of the back rest 14710 and leg rest 14730 beyond their rotatable connection with the seat portion 14720. The pressure of the gas spring 14746 assists in folding the back rest 14710 up or down from a horizontal position toward a vertical position (≧−90° or ≦+90°). Resilient blocking of the gas spring 14746 by a control unit (not shown) locks the back rest 14710 in the desired position. The resilient blocking of the gas spring 14746 allows the back rest 14710 and leg rest 14730 to absorb loads, thereby improving seating comfort. The gas springs can be actuated by a control element attached to the front of the backrest, which actuates both gas springs, for example synchronously, via a hydraulic system.

[0107] The stretch cross mechanism 14740 can synchronously transmit a change in the point of action of the lever arm of the backrest 14712 to the point of action of the lever arm of the legrest 14732. In the open state of the seating position 14700, the points of action 14712 and 14732, and 14743 and 14744 of the stretch cross mechanism 14740 can be point-symmetrical with respect to the midpoint of the center 14742 of the stretch cross mechanism.

[0108] 14, the backrest 14710 of the seating position 14700 assumes an angle α of +45° in the open position, the backrest lever arm 14711 assumes an angle β of −135°, the footrest 14730 assumes an angle γ of −45°, and the footrest lever arm 14731 assumes an angle δ of +135°. As the angle α between the horizontal and the upward vertical of the backrest 14710 (between 0° and 90°) changes, the angle β between the horizontal and the downward vertical of the backrest lever arm 14711 (between −180° and −90°) changes analogously.

[0109] As the position of the point of application 14712 of the backrest lever arm changes, the stretch intersection's connecting point of application 14743 changes. As the distance of the point of application 14743 relative to the rotatably fixed center 14742 of the stretch intersection changes, the point of application 14744 changes in the opposite direction, symmetrically relative to the rotatably fixed center 14742 of the stretch intersection.

[0110] By connecting the point of action 14744 of the stretch intersection with the point of action 14732 of the leg rest lever arm, the latter changes its position point-symmetrically with respect to the point of action 14712 of the back rest lever arm, and angle δ changes to the same angle β and angle γ changes to the same angle α.

[0111] In the open position, any change in the angle α (between 0° and 90°) between the horizontal and the upward vertical of the backrest 14710 is point-symmetrically linked by the stretch cross mechanism 14740 to the angle α (between -180° and -90°) between the horizontal and the downward vertical of the leg rest. When the backrest 14710 is reclined (α<0°) from horizontal (α=0°), the stopper 14745 prevents the leg rest 14730 from aligning symmetrically with the backrest 14710 about another point, so that from this point (α<0°), it aligns axisymmetrically with the backrest 14710 and folds down (α<0°=β). When the angle α of the backrest 14710 is less than 0°, the application points 14712 and 14732, and 14743 and 14744 of the stretch intersection mechanism 14740 are axisymmetric about an axis extending vertically through the center 14742 of the stretch intersection.

[0112] The open seat 14700 can be coupled, docked and undocked again to the upper platform of the lift (not shown, see reference numeral 1400 in FIG. 1) by means of an actuation unit (not shown).

[0113] When folding the seating position 14700 to its folded size, the backrest 14710 can be folded vertically downward from an upwardly tilted or horizontal position. As the backrest 14710 tilts to reach horizontal, the legrest 14730 can synchronously tilt upward to reach a substantially horizontal position. By further folding the backrest 14710 downward, the legrest 14730 can change its direction of movement and fold downward axisymmetrically until both rests are folded vertically downward. The folded seating position 14700 surrounds a folded base frame (not shown, see FIG. 4, item 4100). As shown, the seating position 14700 can also be folded together with the sunshade 14560.

[0114] 5.7.3 Multifunction Platform - Perspective View FIG. 15 is a general perspective view of an exemplary embodiment of a collapsible three-section multifunction platform 15800 that may be an accessory, in an open and folded position.

[0115] The support structure of the multifunction platform 15800 includes a foldable frame and a foldable three-piece base plate 15820 embedded in the frame. The unfolded multifunction platform 15800 is stable and can be used alone as an accessory. The multifunction platform 15800 can be connected to an upper platform (not shown, see, for example, FIG. 1, item 1400) and then disconnected again.

[0116] The frame and base plate 15820 can be opened together to form a tub that is sized to fit the footprint of various Euro-standard or standard beverage crates. The top of the frame has multiple attachment points 15816 where straps, ropes, etc. can be attached to secure the load being carried.

[0117] In the illustrated embodiment, the frame is foldable and includes two side frame segments 15811 and two center frame segments 15812. The center frame segment 15812 and the side frame segments 15811 are rotatably connected by four locking hardware 15814. The locking hardware can be angled downward 90° from horizontal to vertical on the side frame segments 15811. When the side frame segments 15811 are folded from vertical to horizontal, the locking hardware 15814 engage.

[0118] The ends of the central frame segment 15812 and the side frame segments 15811 are shaped to provide an optically nearly seamless outward closure with blinds 15815 in the open horizontal position in the embodiment shown here.

[0119] The underside of the two center frame segments 15812 each has a locking tongue that allows the multifunction platform to be docked into two receiving locks on the upper side of the upper platform. The actuation unit for unlocking the accessory locking tongue can be located laterally on one or both sides of the accessory upper platform. In the unlocked state, the multifunction platform can be removed from the chassis.

[0120] To fold the multifunction platform 15800, the side frame segments 15811 can be bent upward at an acute angle to toggle and release the locking hardware 15814 between the center frame segment 15812 and the side frame segments 15811. The multifunction platform can then be folded vertically downward. [Explanation of symbols]

[0121] The symbols are in the format wxyz. The first digit w indicates the figure number. The second digit x indicates the assembly in figure w. The last two digits y and z indicate subelement z of element y of assembly x in figure w. x000 Equipment for transporting luggage x100 chassis x110 jib x120 steering fork x120 steering fork x121 rotary joint x122 vertical axis x123 Toothed belt wheel x130 wheels x140 Jib pivot axis x141 Pinion x142 vertical axis x143 Toothed belt wheel x144 Locking pin Toothed belt wheel x145 Playing with Movement x150 Slidable Toothed Wheel x151 thread x152 nails x160 Toothed Belt x200 Lower Platform x210 Rope x211 Play x212 Driver on the rope x220 steering x221 Playing with movement x222 steering claw x223 Lock pin x231 Extension coil spring x232 x231 driver x233 Tension spring x234 Bowden cable x235 gas spring x240 pivot axis x300 lift x310 intersection x311 1st long arm x312 2nd long arm x313 short arm x314 Bell crank x315 pivot point x400 upper platform x410 guide rail x411 carriage x420 gas spring x421 plunger x422 cylinder x430 trigger system x431 control element x440 Cable System x441 Movable Caster x442 1st Caster x443 2nd Caster x500 supine position x510 lower frame x511 Lower side frame segment x512 Lower Center Frame Segment x514 Locking hardware x515 blinds x520 side wall x521 tension bracket x522 kick spring x523 Pull Wire x530 upper frame x531 Upper side frame segment x532 upper center frame segment x540 bottom plate x541 Head part of bottom plate x542 flap x543 torque hinge x550 retention bracket x560 sunshade x600 steering wheel x600 steering wheel x610 handle grip x620 telescopic arm x700 sitting position x710 backrest x711 Backrest lever arm x712 Lever arm backrest x720 sitting part x730 footrest x731 Footrest lever arm x732 Point of application Lever arm Lever rest x740 stretch cross mechanism x741 Stretch intersection x742 Center of stretch intersection x743 Stretch cross section of application point Backrest x744 Stretch Crossover Footrest x745 stopper x746 gas spring x750 retaining bracket x800 Multifunction Platform x811 Side Frame Segment x812 center frame segment x814 Locking hardware x815 blinds x816 mounting point x820 bottom plate

Claims

1. Folding devices for carrying loads, including: Platform 1; Second Platform; and a lift comprising a plurality of folding cross sections rotatably coupled to a first platform and a second platform; A folding device, wherein each of the plurality of folding intersections comprises a first long arm, a second long arm, and a short arm, the first long arm being fixedly connected to the second long arm.

2. 10. The folding device of claim 1, wherein the first long arm is foldable and the short arm is rotatably coupled to the second long arm.

3. 3. A foldable device according to claim 1, wherein the length of the first long arm is substantially twice the length of the short arm, and the length of the second long arm is substantially twice the length of the short arm.

4. A folding device according to any one of claims 1 to 3, further comprising: A chassis having a plurality of jibs, the plurality of jibs having a plurality of wheels, each jib having a corresponding wheel of the plurality of wheels, each of the plurality of jibs coupled to a first platform.

5. A folding device according to claim 4, further comprising: An apparatus for aligning a plurality of jibs and a plurality of wheels, the apparatus being configured to rotate the plurality of jibs and the plurality of wheels together at least through a respective rotation angle between an open position and a folded position.

6. The folding apparatus of claim 5, wherein the plurality of jibs and the plurality of wheels have different rotation angles, and the plurality of jibs and the plurality of wheels are disposed below the first platform in the folded state.

7. 7. A folding apparatus according to any one of claims 4 to 6, wherein the jibs are lockable in the folded and open positions.

8. 7. A folding device according to any one of claims 4 to 6, wherein the steering forks of the wheels are freely rotatable and / or lockable in the open position of the chassis.

9. 9. The folding device of claim 1, wherein the second platform includes a plurality of guide rails, and the second long arm of each of the plurality of folding intersections is rotatably coupled to at least one of the plurality of guide rails via one or more rails.

10. The folding device of claim 9 , wherein each of the plurality of guide rails includes one or more carriages, the one or more carriages being synchronously coupled to raise and lower a lift.

11. 11. The folding device according to any one of claims 1 to 10, wherein the first platform and / or the second platform further comprises a plurality of gas springs for raising and lowering the lift.

12. 12. A foldable device according to any one of claims 1 to 11, further comprising a foldable attachment configured to couple with the second platform, the foldable attachment surrounding the foldable device in a U-shape in the folded state.

13. 13. A foldable device according to any one of claims 1 to 12, wherein the foldable device has a rectangular parallelepiped shape in the folded state.

14. 14. A folding apparatus according to any one of claims 4 to 13, wherein the lift and the chassis are mechanically connectable to each other.

15. 15. A folding device according to any one of claims 4 to 14, wherein the energy for automatically opening and / or closing the chassis is provided by one or more gas springs located in the first and / or second platform.

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