Folding frame for baby carriage

Abstract

The invention relates to a stroller frame (10) having a first frame element (1), a second frame element (2), a third frame element (3) and a traction element (4), the first, second and third frame elements (1, 2, 3) being rotatably connected to one another and being transferable by rotation between a use position and a stowed position, when a transition from the stowed position to the use position, the first frame element (1) is moved relative to the third frame element (3) in a first direction and sweeps over a first angular range, and the second frame element (2) is also moved relative to the third frame element (3) in the first direction and sweeps over a second angular range, the second angular range being preferably smaller than the first angular range, the invention is characterized in that the first frame element (1) and the second frame element (2) are connected to each other by means of a traction element (4), and the first frame element (1) drives the second frame element (2) to move in a first direction by means of the traction element (4) when the first frame element (1) reaches or exceeds an idle travel angle (LW) relative to the second frame element (2).

Description

Technical Field

[0001] Various stroller frames that can be connected to infant car seats are known. These stroller frames are either permanently connected to the infant car seat or detachably connected to the infant car seat when needed. Background Technology

[0002] However, stroller frames are not used continuously and must be temporarily stored when not in use. When not in use, the stroller frame and, if possible, its corresponding seat should require minimal space for space-saving storage. Therefore, stroller frames or strollers are typically foldable.

[0003] The drawbacks of known foldable strollers to date are that folding or unfolding them is very complex and technically costly. In particular, transforming the stroller from a folded (storage) to an unfolded (use) position requires multiple hand operations. These hand operations are often difficult to remember, unintuitive to perform, and mechanically complex. Significant injury risks also exist with known foldable strollers to date, especially from the risk of fingers and / or hands being pinched when unfolding (or folding) the stroller. Known foldable strollers to date are also technically costly to construct.

[0004] Therefore, there is essentially a need for strollers that can be easily transitioned from a storage position to a use position, especially without requiring multiple hands or tools.

[0005] While systems designed to achieve simpler deployment are known, these systems require difficult-to-construct end stops and synchronous coupling systems formed by the frame elements of the stroller frame within one or more articulated sections.

[0006] For example, CN103523068B discloses a stroller frame in which the pusher section and the front wheel bracket each have gear components within the hinge, and these gear components work together to synchronize the movement of the pusher section and the front wheel bracket. However, this has the following disadvantages: it requires a large number of components, and the gears are subjected to high loads, thus requiring high-cost manufacturing, resulting in a high overall manufacturing cost. In addition, gear wear causes interference with smooth synchronization. Summary of the Invention

[0007] Therefore, the object of the present invention is to mitigate or eliminate at least one of the above-mentioned disadvantages and to provide a simple, robust, safe and cost-effective solution, and in particular, to provide a solution in which the stroller frame can be opened or unfolded as easily as possible in a single, simple and continuous action of the user.

[0008] The task is solved by the stroller frame according to claim 1 and the method according to claim 14.

[0009] In particular, the task is solved by a stroller frame having: a first frame element, a second frame element, a third frame element, and a pull element, wherein the first, second, and third frame elements are rotatably connected to each other and can be rotated between a use position and a storage position; wherein, when changing from the storage position to the use position, the first frame element moves relative to the third frame element along a first direction and sweeps through a first angle range, and the second frame element also moves relative to the third frame element along the first direction and sweeps through a second angle range, wherein the second angle range is preferably smaller than the first angle range, characterized in that the first frame element and the second frame element are connected to each other by the pull element, and when the first frame element reaches or exceeds the free travel angle (Leerlauf-Winkel) relative to the second frame element, the first frame element drives the second frame element to move along the first direction by the pull element.

[0010] In particular, the objective according to the invention is achieved by a stroller frame having: a first frame element, a second frame element, a third frame element, and a pull element, wherein the first, second, and third frame elements are rotatably connected to each other and can be rotated from a use position to a storage position; wherein, when rotating from the storage position to the use position, the first frame element moves relative to the third frame element along a first direction and sweeps through a first angle range, and the second frame element also moves relative to the third frame element along the first direction and sweeps through a second angle range, wherein the second angle range is preferably smaller than the first angle range; wherein the first angle range is particularly defined as the range in which the first angle can be when changing between the storage position and the use position, and the second angle range is particularly defined as the range in which the second angle can be when changing between the storage position and the use position. Here, the first angle is specifically defined as the angle between the third extension direction of the third frame element and the first extension direction of the first frame element along the first direction, about the intersection of the first and third extension directions, in a plane perpendicular to one or more axes about which the third frame element is rotatably connected to another frame element; and the second angle is specifically defined as the angle between the third extension direction of the third frame element and the second extension direction of the second frame element along the first direction, about the intersection of the second and third extension directions, in a plane perpendicular to one or more axes about which the third frame element is rotatably connected to another frame element. Furthermore, the first and second frame elements are interconnected by a traction element, and when the first frame element reaches or exceeds the idle travel angle relative to the second frame element, the first frame element drives the second frame element to move along the first direction via the traction element.

[0011] The first direction is described herein as a direction that at least substantially specifies the direction of movement of the first frame element when it moves out of its stowed position or is unfolded.

[0012] The first and second angles are determined by angles preset by combining a first or second extension direction with a third extension direction. Here, the angles are determined such that they originate from the third extension direction and extend along the first direction around the intersection of a line parallel to the third extension direction and a line parallel to the first or second extension direction.

[0013] The preferred direction of extension for the frame elements is one in which the corresponding frame elements extend substantially. This direction can be defined by the two points of the frame elements that are furthest apart from each other. Alternatively or additionally, the corresponding direction can be defined by the longest possible distance within the frame elements.

[0014] "Reaching (or exceeding) the free travel angle" can be understood as: during the transition from the storage position to the use position, the angle between the first frame element and the second frame element reaches or exceeds the free travel angle after the initial angle between the first frame element and the second frame element is less than the free travel angle (so that the first frame element cannot drive the second frame element through the traction element).

[0015] When the tensioning element has a certain degree of elasticity, allowing its length to change reversibly under tensile load, it is especially possible to exceed the limit of the free travel angle.

[0016] Shortly after leaving the storage position, in order to transition to the use position (preferably also within the storage position itself), the second frame element is arranged between the first and third frame elements (in a view taken along at least one of the axes of the axis of view, i.e., typically a side view). "Shortly after leaving" here may, for example, mean that each of the elements has swept a maximum of 10° or 5° since leaving the storage position. For example, in the storage position itself, at least two frame elements may also be directly stacked on top of each other.

[0017] When the stroller frame changes from the storage position to the use position, the first frame element moves or rotates relative to the third frame element in a first direction, especially away from the second frame element, and sweeps across a first angular range.

[0018] When the first frame element reaches (or may exceed) a predetermined angle (the aforementioned free travel angle) relative to the second frame element, the first frame element drives the second frame element to move in a first direction via a traction element, or the first frame element pulls the second frame element in the first direction, causing the second frame element to sweep across a second angle range (or is assisted in this regard in any way).

[0019] Here, the stroller frame includes at least one (first) axis of rotation between at least two of the first, second, and third frame elements.

[0020] The storage position is specifically understood as a position in which the stroller frame is at least substantially folded, and the use position is specifically understood as a position in which the stroller frame is at least substantially unfolded.

[0021] It is possible that, due to gravity or due to the compression of textiles (softgoods) under pressure, the second frame element has moved away from the third frame element, without needing to reach the position where the second frame element is in use.

[0022] It can be specified that the first frame element does not drive the second frame element until it is fully in the use position, but only drives it until a position from which the weight of the stroller frame or an external force applied for pushing acts on the frame elements such that these frame elements continue to be driven to move until in the use position (e.g., when the stroller frame is carried by the wheels).

[0023] This invention is based on the concept of utilizing a common support structure for the frame elements to couple the second frame element to the first frame element such that only the movement of the first frame element (especially relative to the third frame element) is required to unfold the stroller frame. Simultaneously, the action described above can be delayed by the idle travel angle, resulting in a less strenuous and more continuous movement when the stroller frame unfolds.

[0024] Here, the first frame element is preferably a pusher section, the second frame element is preferably a rear wheel bracket, and the third frame element is preferably a front wheel bracket.

[0025] In a preferred embodiment, the traction element is connected to the first frame element at a first attachment point at its first end and to the second frame element at a second attachment point at its second end.

[0026] It is advantageous to place the traction element at the corresponding end, as this allows the free travel angle to be obtained simply from the length of the traction element (and the location of the attachment point and, if possible, other geometry of the stroller frame). In particular, placement at only two contact points is also simpler and less costly than more complex placements.

[0027] It is further preferred that the pulling element be configured to be shape-unstable, preferably as a strap, band, chain, or rope. Shape instability particularly means that the pulling element can be reversibly bent and / or folded and / or rolled up. The thickness of the pulling element (especially the minimum extension dimension transverse to the extension direction) is preferably at most 5 mm, more preferably at most 2 mm or at most 1 mm.

[0028] Through a shape-unstable implementation, the traction element allows for easy folding or repositioning to a stowage position because it generates no (or at least no significant) resistance when the first and second frame elements approach each other. Instead, this traction element enables automatic folding and / or avoidance. Furthermore, the provided devices are not only simple to install but also inexpensive to manufacture, allowing for easy replacement should wear and tear require replacement.

[0029] According to a further preferred embodiment, the free travel angle can be adjusted or changed by adjusting and / or changing the length of the pulling element and / or the first and / or second attachment points (especially during transitions between the storage position and the use position). Preferably, this is achieved by employing a slidingly movable arrangement at the first and / or second attachment points.

[0030] The attachment of the traction element to the corresponding frame element can be a fixed attachment and / or a movable—especially a sliding—attachment. Preferably, each end of the traction element is either fixedly or slidably attached to the corresponding frame element. More preferably, one end is fixed while the other end is slidably attached to the corresponding frame element.

[0031] Fixed attachments should be defined by attachment points that remain constant at the relevant frame element, especially relative to the frame element, where rotatability around the attachment point is still permissible.

[0032] Fixed attachments may include, for example, detachable, particularly tool-free and / or non-detachable connections between a tension element and an associated frame element, and / or riveting.

[0033] Movable (especially slidable) attachments should be defined by attachment points of the traction element that can move in a specific area of ​​the relevant frame element. Preferably, the attachment point can be located in the use position at a position relatively close to the first or second axis of rotation (e.g., at least 1 cm, preferably at least 4 cm and / or at most 14 cm, preferably at most 10 cm) and in the storage position, it can slide between a position relatively close to the first or second axis of rotation (e.g., at least 1 cm, preferably at least 4 cm and / or at most 14 cm, preferably at most 10 cm) and a position further away (e.g., at least 2 cm, preferably at least 6 cm and / or at most 18 cm, preferably at most 12 cm) (wherein the possibility of sliding is always further reduced when changing from the storage position to the use position).

[0034] Sliding attachments can be similar to fixed attachments, including detachable and / or non-detachable connections between a traction element and an associated frame element.

[0035] Detachable connections can be constructed, for example, as buckle connections (Schnallenverbindung).

[0036] Non-detachable connections can be constructed as riveted or threaded connections, but they can also be constructed as ring connections.

[0037] The attachment that can move (sliding) can be constructed as a loop (e.g., formed by the traction belt itself, especially by sewing itself) or as a ring or by means of a slider (for sliding in a guide constructed in the corresponding frame element), etc.

[0038] The attachment point of the traction element may be spaced apart from the first and / or second rotation axis, preferably at least 1 cm or at least 3 cm (wherein the attachment point may, for example, rest against the housing of the hinge), and / or up to 30 cm, preferably up to 15 cm.

[0039] Even in the case of attachment with slidable movement, the minimum and / or maximum distance from the attachment point to the first or second axis of the frame element can be determined—for example, by a stop element.

[0040] The length of the traction element can be between 5 cm and 35 cm, preferably between 10 cm and 25 cm, and more preferably between 15 cm and 20 cm.

[0041] Here, the slidable arrangement should be understood as an arrangement in which the attachment point can move along the extension direction of the frame element. For example, the following rail is suitable for this, which secures the attachment point by engagement. However, a simple tab arranged around the corresponding frame element and thus movable along the extension direction is also slidable in the sense of this application. Here, it is possible to prevent slippage along the extension direction of the frame element by fixing (e.g., by at least one engagement device and / or at least one protrusion and / or at least one hook, etc.).

[0042] In a further preferred embodiment, the stroller frame has a first hinge at one end of a third frame element, and the first and / or second frame elements are rotatably connected to the third frame element about the first hinge.

[0043] By coupling the frame elements with at least one hinge, a rotatable connection between the frame elements can be achieved. The embodiment with one hinge is particularly simple and requires a minimal number of components. Furthermore, the resulting geometry is particularly simple, allowing for easy transformation of the stroller frame from a storage position to a use position. "At one end" should be understood in particular here, meaning that the hinge closest to the far end of the third frame element should always be considered the first hinge.

[0044] Here, any mounting / support structure that allows frame elements to rotate relative to each other about an axis should be understood as an articulation.

[0045] According to a further preferred embodiment, the frame has a second hinge portion disposed at a first, second, or third frame element to rotatably connect the first and second frame elements, or the second and third frame elements, or the first and third frame elements, wherein the axis of rotation is parallel to the axis of rotation of the first hinge portion.

[0046] By using the second hinge, not all frame elements rotate around the same axis. This misalignment between the first and second hinges provides an intermediate space in the folded position, allowing the frame to be stored in a more compact form. This arrangement is particularly useful when other components (such as bags or baby carriers) are placed on the frame elements, as is common in many cases, because the other components neither obstruct each other nor hinder the frame elements.

[0047] The first, second, and third frame elements are always rotatably connected to each other about at least one axis. In an embodiment with two hinges, one frame element can be connected to one of the other two frame elements via a first axis and to the other of the other two frame elements via a second axis parallel to the first axis, while the other two frame elements do not necessarily need to be directly connected to each other.

[0048] According to another aspect, the frame can be locked in the use position and / or the storage position. Preferably, this is achieved by at least one first locking element within the first and / or second hinge, said at least one first locking element may be spring-preloaded and is preferably directly or indirectly connected to an unlocking device.

[0049] Typically, stroller frames are either in use or ready for use, or in a stored position. In the use position, it is especially important to prevent frame components from accidentally rotating relative to each other to improve safety and comfort. In this regard, it is advantageous for stroller frames to be lockable in the use position to prevent frame components from accidentally rotating or folding.

[0050] In the storage position, it is also preferable to lock the stroller frame. This prevents the stroller frame from accidentally unfolding and, in particular, ensures that the stroller frame remains in the stored position. This avoids unnecessary space consumption caused by the stroller frame not being fully folded. In addition, it simplifies the handling of the stroller frame in the stored position by preventing accidental tipping.

[0051] For example, the storage position can also be locked by a first locking element or by a second (additional) locking element, such as by a hook pre-tightened to the locked position at one frame element and, if possible, a protrusion at another frame element, into which the hook can engage. The frame may include a first unlocking device to disengage the lock of the use position and / or storage position, which is preferably located at the first frame element, particularly at the pusher section.

[0052] An additional, especially independent, second unlocking device may also be provided to disengage the second locking element, for example, by operating the second unlocking device to temporarily turn the hook portion to the unlocked position.

[0053] Specifically, the second locking element can be configured to function like a leaf spring and have a ramp and engagement section at its distal end, particularly a hook-like portion. When the retracted position is reached, another frame element can bend the engagement section along the ramp against the force of the leaf spring until the engagement section engages with the frame element (or, if possible, a protrusion located thereon) due to the force of the leaf spring. The locking element can then be unlocked by manually bending the second locking element.

[0054] The first frame element (especially the pusher section) preferably includes a proximal section and a distal section, wherein the proximal section of the first frame element (especially the pusher section) may be rotatably and / or pushably connected to the distal section at one end (for length or height adjustment), and may be rotatably connected to the second and / or third frame element at the other end.

[0055] In one embodiment, in the storage position (or at least shortly after leaving the storage position), the second frame element may be arranged between the third frame element and the first frame element (especially the proximal section of the first frame element).

[0056] In another implementation, locking is automatically triggered when the usage and / or storage location is reached.

[0057] The automatic triggering simplifies use by requiring less manual intervention to move the stroller frame to its storage and / or use position. This results in simpler and safer operation.

[0058] In a further preferred embodiment, at least the first and / or the second and / or the third frame element is selected from the front wheel bracket, the rear wheel bracket, and the pusher segment, wherein they are preferably selected from each other.

[0059] By selecting frame components from the above list of components, the overall structure of the stroller frame is simplified, as unnecessary intermediate components can be eliminated.

[0060] In another embodiment, the stroller frame includes an infant receiving unit comprising a back section and a hip section, wherein the back section is preferably rotatably connected to and / or rotatably arranged relative to the hip section, wherein, in the stored position, the infant-contacting surfaces of the back section and the hip section are preferably abutting each other or opposite each other, particularly with an angle between the surfaces of at least 2° but at most 50°.

[0061] In one implementation, the baby receiving unit may be integrally constructed with the stroller frame.

[0062] In one implementation, the baby receiving unit can be detachably (especially without tools and / or damage) connected to the stroller frame, for example, via at least one adapter. The baby receiving unit can occupy both a storage location and a use location, and the storage and use locations of the baby receiving unit are not necessarily the same as the storage / use locations of the stroller frame.

[0063] The baby receiving unit is connected to the stroller frame, simplifying assembly and disassembly. The surfaces are also positioned opposite each other, resulting in a more compact overall storage location. This ensures the stroller frame remains compact even in its storage position for easy transport, simple storage, and maneuvering.

[0064] In another embodiment, the baby receiving unit is connected to the stroller frame such that the baby receiving unit moves from the use position to the storage position simultaneously with the stroller frame.

[0065] Thus, by changing the usage position, a stroller that is ready to use can be provided in a simple way without having to adjust the baby receiving unit separately. It is also advantageous to detach the baby receiving unit from the stroller frame so that it can be removed when needed.

[0066] In another embodiment, the surfaces of the back section and the buttocks section that do not come into contact with the infant are preferably abutted against each other or opposite each other, especially with an angle between the surfaces of at least 2° but at most 50°.

[0067] In one implementation, the baby receiving unit can be switched from a storage position to a use position independently—especially independently of the stroller frame (and vice versa). Preferably, the switch of the baby receiving unit can be made before and / or after the stroller frame is switched. More preferably, the baby receiving unit must already be in the storage position before the stroller frame can be switched from the use position to the storage position.

[0068] In another embodiment, the baby receiving unit can be connected to the stroller frame such that the baby receiving unit can simultaneously change from a use position to a storage position along with the stroller frame (and vice versa).

[0069] In some embodiments, when changing from the storage position to the use position, the second angle can be at least 0.2 times and / or at most 0.8 times the first angle, preferably at least 0.3 times and / or at most 0.7 times, and more preferably at least 0.4 times and / or at most 0.6 times, through rotation and / or oscillation of the first frame element.

[0070] This achieves sufficient compactness while simultaneously allowing sufficient clearance between the frame components.

[0071] More preferably, in the stroller frame, the first angle can be 140°-220°, more preferably 160°-200°, even more preferably 110°-240°, and especially 170°-190°.

[0072] The corresponding angles can achieve an ergonomic geometry in the usage position through the appropriate arrangement of the frame components relative to each other.

[0073] Another aspect of the invention includes a method for changing a stroller frame according to claim 1 from a storage position to a use position, wherein a first frame element is rotated and / or flipped relative to a third frame element, and after reaching (or possibly exceeding) an idle travel angle between the first frame element and the second frame element (especially by a first angle), the second frame element is pulled along a first direction by a pulling element.

[0074] The same advantages as those described in conjunction with the stroller frame according to the invention can be achieved using the method according to the invention. It should be noted that the features described within the scope of the stroller frame according to the invention are preferably applicable to the method for unfolding the stroller frame according to the invention. Similarly, the features of the method according to the invention can also be transferred to the stroller frame according to the invention by configuring the stroller frame such that it is suitable for implementing the corresponding method features.

[0075] The invention is also described below with reference to other details, features, and advantages, which are further described in detail with the aid of the accompanying drawings. The features and combinations thereof described, shown below in the figures and described with reference to the drawings, can be used not only in the combinations given, but also in other combinations or individually, without departing from the scope of the invention. Attached Figure Description

[0076] This is shown here:

[0077] Figure 1 Showing the stroller frame;

[0078] Figure 2 Showing the components of the stroller frame;

[0079] Figures 3 to 5 A first embodiment with a hinge is shown;

[0080] Figures 6 to 8 Another embodiment with a hinge is shown;

[0081] Figures 9 to 11 An embodiment with two hinged parts is shown;

[0082] Figure 12 A schematic diagram showing the angle is provided.

[0083] Figure 13 A stroller frame with a baby receiving unit is shown;

[0084] Figure 14 Another view of the stroller frame with baby receiving unit is shown;

[0085] Figure 15 A view of the first hinge is shown;

[0086] Figure 16 Another view of the stroller frame with baby receiving unit is shown. Detailed Implementation

[0087] Here, Figure 1 A stroller frame 10 is shown. In the illustrated embodiment, the stroller frame 10 has a first hinge 5, through which first frame elements 3, 1, and 2 are rotatably connected. Here, all frame elements can rotate about an axis predetermined by the first hinge 5. First frame elements 1 and 2 are coupled together by a tension element 4. In the illustration, the stroller frame 10 is in the use position, meaning the stroller frame is fully extended. As shown, wheels can be mounted at the ends of the third and second frame elements 3, 2 that are not connected by the first hinge 5.

[0088] Figure 2 The components of the stroller frame are shown. In particular, Figure 2 The first frame element 1, the second frame element 2, the third frame element 3, and the traction element 4 are shown.

[0089] Figure 3The same embodiment with only the first hinge 5 in the stowed position is also shown. The stowed position is characterized in particular by all frame elements folded together adjacent to each other. Here, the shape-unstable tension element 4 can occupy a drooping form, which allows the first frame element 1 to be close to the second frame element 2.

[0090] Figure 4 Show Figure 3 In the embodiment of the partially deployed position, which is achieved by moving the first frame element 1 along a first direction before reaching the usage position, the tension element 4 is in a particularly fully stretched position between the first attachment point AP1 and the second attachment point AP2. The tension element 4 is connected to the first frame element 1 at the first attachment point and to the second frame element 2 at the second attachment point. Through this connection, when the first frame element 1 moves itself along the first direction, it applies a force to the second frame element 2 in the direction of the first direction. The idle travel angle LW can be obtained from the length of the tension element 4. This idle travel angle is the angle between the extension direction of the second frame element 2 and the extension direction of the first frame element 1.

[0091] Figure 5 This illustrates a further stage of development in the stroller frame 10 having the first hinge 5. After reaching (or possibly exceeding) the free travel angle LW, the first frame element 1 applies force to the second frame element 2 in a first direction, thereby causing the second frame element to move further. Consequently, the second frame element 2 rotates about an axis predetermined by the first hinge 5. This causes a second angle W2 to open and increase, given by the angle about the intersection (measured along the first direction) between the extending directions of the third frame element 3 and the second frame element 2. In embodiments with only one first hinge 5, the intersection is typically the axis of said hinge 5. The first angle W1 is here obtained by the angle about the axis of the first hinge 5, also along the first direction, between the extending directions of the third frame element 3 and the first frame element 1. Here, the first direction points to the right away from the third frame element 3 in the figure (in a counter-clockwise direction). In the single-axis implementation shown here, it is necessarily the case that the first angle W1 is the sum of the second angle W2 and the idle travel angle (not shown here).

[0092] Figure 6 Another embodiment of the invention is shown, which has only one first hinge 5. The stroller frame 10 is shown again in its stowed position.

[0093] Figure 7 Show Figure 6 The embodiment shown is when the idle stroke angle LW is reached. (Compared to...) Figures 3 to 5The difference here is that the tension element 4 does not define the free travel angle LW under straight tension, but rather wraps around the first hinge 5 at least partially. Furthermore, in the illustration shown, the first direction now points to the left away from the third frame element 3 (in a clockwise direction).

[0094] Figure 8 The other phase of the unfolding is shown again, which follows Figure 7 The second angle W2 opens again because the movement of the first frame element 1 forces the second frame element 2 to continue moving. Here, when the first frame element 1 rotates to the right, the pulling element 4, which can be wound around the first hinge 5, can pull the second frame element 2 to the upper left. Again, it can be seen that in the single-axle arrangement structure, the first angle W1 is obtained by the sum of the idle stroke angle (not shown here) and the second angle W2.

[0095] exist Figures 2 to 5 In this design, the first frame element can be considered a pusher, the second frame element can be considered a rear wheel support, and the third frame element can be considered a front wheel support. Figures 6 to 8 In this design, the first frame component can also be considered as a pusher component, the second frame component can be considered as a front wheel support, and the third frame component can be considered as a rear wheel support.

[0096] Frame components can generally be constructed in a bracket-like shape (such as...) Figures 2 to 8 (as shown in the diagram), but the corresponding disc-shaped portion shown at the proximal end is only used as an example to construct the hinge portion and is not necessarily required.

[0097] Figure 9 Another embodiment of the stroller frame 10 is shown, which has a first hinge portion 5 and a second hinge portion 6. In the illustrated embodiment, the second hinge portion 6 is disposed as a connecting structure between the first frame element 1 and the second frame element 2.

[0098] Figure 10 Another embodiment is shown, having a first hinge portion 5 and a second hinge portion 6, wherein the second hinge portion 6 enables the connection between the third frame element 3 and the second frame element 1.

[0099] Figure 11 Another dual-hinged embodiment is described, wherein the second hinge 6 connects the first frame element 1 and the second frame element 2 to each other.

[0100] Figure 12The first angle W1 and the second angle W2 are determined to illustrate a more complex case of a double-hinged stroller frame. In this embodiment, the frame elements do not all rotate about an axis predetermined by the first hinge 5, but rather the rotation about the axis of the first hinge 5 is superimposed on the rotation about the axis of the second hinge 6. For better illustration, the first extending direction ER1, the second extending direction ER2, and the third extending direction ER3 of the first, second, and third frame elements 1, 2, and 3 are explicitly labeled here. The first angle W1 is determined here by the angle between the first extending direction ER1 and the third extending direction ER3 about their intersection. Since the first angle W1 belongs to the rotation that describes the movement of the first frame element 1 along the first direction, it is greater than 180° in the position shown, as illustrated. The second angle W2 is obtained by the angle between the second extending direction ER2 and the third extending direction ER3 about their intersection, and is less than 90° in the position shown. In the case of a double-hinged arrangement, the free travel angle LW (not shown here) between the first and second frame elements 1 and 2 is not necessarily obtained by the sum of the first and second angles W1 and W2.

[0101] Figure 13 A stroller frame 10 with an infant receiving unit 20 is shown, the infant receiving unit including a hip section configured as a seat 21 and a back section configured as a backrest 22. The infant receiving unit 20 is positioned here on the stroller frame 10 and is in the same use position as the stroller frame.

[0102] Figure 14 Shown from a side view, as follows Figure 13 The stroller frame 10 shown has a baby receiving unit 20. It can be seen how the pulling element 4 is positioned between the first frame element 1 and the second frame element 2 in the use position under maximum tension.

[0103] Figure 15An enlarged view of the first hinge portion 5 according to one embodiment is shown. Here, the second frame element 2 includes two parallel extending rods. The first frame element 1, the second frame element 2, and the third frame element 3 are rotatable relative to each other about the axis of the first hinge portion 5. A traction element 4 connecting the first frame element 1 and the second frame element 2 is located at the first attachment point AP1 on the first frame element 1. An arrangement is shown in which the first attachment point AP1 is fixedly fastened to the first frame element 1 by rivets 7. The second attachment point AP2 is slidably located on the second frame element 2. In the embodiment shown here, the slidable location is achieved by using a ring that allows the second attachment point AP2 to move along the extending direction of the second frame element. In the illustrated embodiment, the rear wheel bracket constitutes the second frame element 2, the pusher constitutes the first frame element 1, and the front wheel bracket constitutes the third frame element 3.

[0104] Figure 16 The stroller frame 10 is shown in its stowed position. The pull element 4 is attached to the first frame element 1 at the first attachment point by means of a rivet 7 and to the second frame element by means of a ring.

[0105] It should be noted that all the components described above, taken individually and in any combination (especially the details shown in the accompanying drawings), are claimed as essential features of the invention. Modifications to this will be familiar to those skilled in the art.

[0106] Furthermore, it should be noted that efforts are made to achieve the broadest possible scope of protection. In this regard, the disclosure included in the claims can also be clarified by features described together with other features (even if these other features are not mandatory). It should be explicitly noted that brackets and the term "in particular" should emphasize the optionality of features in the relevant context (this should not, conversely, mean that the feature should be considered mandatory in the relevant context without such marking). The term "element" should preferably refer to a corresponding coherent structure (or component) that may be connected to at least one other structure (as a monolithic and / or immovable integral structure), or that may be separated from all other structures.

[0107] At least Figures 13 to 16 It also has the following aspects, which are aesthetic properties.

[0108] List of reference numerals

[0109] 1 First chassis component

[0110] 2 Second frame components

[0111] 3 Third frame components

[0112] 4 traction elements

[0113] W1 First Angle

[0114] W2 Second Angle

[0115] ER1 first extension direction

[0116] ER2 second extension direction

[0117] ER3 third extension direction

[0118] AP1 First Attachment Point

[0119] AP2 Second Attachment Point

[0120] 5 First hinge section

[0121] 6 Second hinge section

[0122] 10 stroller frames

[0123] 20 Infant Admission Unit

[0124] 21 seats

[0125] 22 backrest

[0126] LW empty travel angle

[0127] 7 rivets

Claims

1. A stroller frame (10) comprising: a first frame element (1), a second frame element (2), a third frame element (3), and a traction element (4). in, The first, second, and third frame components (1, 2, 3) are rotatably connected to each other and can be rotated between a use position and a storage position. When transitioning from a storage position to a usage position, the first frame element (1) moves relative to the third frame element (3) along a first direction and sweeps across a first angle range, and the second frame element (2) also moves relative to the third frame element (3) along the first direction and sweeps across a second angle range, wherein the second angle range is preferably smaller than the first angle range. The first frame element (1) and the second frame element (2) are connected to each other by a traction element (4), and when the first frame element (1) reaches or exceeds the idle travel angle (LW) relative to the second frame element (2), the first frame element (1) drives the second frame element (2) to move in a first direction by the traction element (4).

2. A stroller frame (10), particularly the stroller frame according to claim 1, the stroller frame having: a first frame element (1), a second frame element (2), a third frame element (3), and a traction element (4). in, The first, second, and third frame components (1, 2, 3) are rotatably connected to each other and can be rotated between a use position and a storage position. When transitioning from a storage position to a usage position, the first frame element (1) moves relative to the third frame element (3) along a first direction and sweeps across a first angle range, and the second frame element (2) also moves relative to the third frame element (3) along the first direction and sweeps across a second angle range, wherein the second angle range is preferably smaller than the first angle range. The first angle range is specifically defined as the range in which the first angle (W1) can be positioned when changing between the storage position and the use position, and the second angle range is specifically defined as the range in which the second angle (W2) can be positioned when changing between the storage position and the use position. Wherein, the first angle (W1) specifies the angle along the first direction between the third extension direction (ER3) of the third frame element (3) and the first extension direction (ER1) of the first frame element (1) at the intersection of the first extension direction (ER1) and the third extension direction (ER3) in a plane perpendicular to one or more axes about which the third frame element (3) is rotatably connected to another frame element. Furthermore, the second angle (W2) specifies the angle along the first direction between the third extension direction (ER3) of the third frame element (3) and the second extension direction (ER2) of the second frame element (2) at the intersection of the second extension direction (ER2) and the third extension direction (ER3) in a plane perpendicular to one or more axes about which the third frame element (3) is rotatably connected to another frame element. The first frame element (1) and the second frame element (2) are connected to each other by a traction element (4), and when the first frame element (1) reaches or exceeds the idle travel angle (LW) relative to the second frame element (2), the first frame element (1) drives the second frame element (2) to move in a first direction by the traction element (4).

3. The stroller frame (10) according to claim 1 or 2, wherein, The tension element (4) is connected to the first frame element (1) at the first attachment point (AP1) at the first end and to the second frame element (2) at the second attachment point (AP2) at the second end.

4. The stroller frame (10) according to any one of the preceding claims, wherein, The tension element (4) is constructed to be of an unstable shape, preferably as a belt, band, chain or rope.

5. The stroller frame (10) according to any one of the preceding claims, wherein the stroller frame has a first hinge (5) at one end of a third frame element (3), and the first and / or second frame elements (1, 2) are rotatably connected to the third frame element (3) around the first hinge (5).

6. The stroller frame (10) according to any one of the preceding claims, particularly the stroller frame according to claim 5, wherein the stroller frame has a second hinge (6) disposed at the first, second, or third frame element (1, 2, 3) for rotatably connecting the first and second frame elements (1, 2) or the second and third frame elements (2, 3) or the first and third frame elements (1, 3) to each other, wherein, The axis of rotation is parallel to the axis of rotation of the first hinge (5).

7. The stroller frame (10) according to any one of the preceding claims, especially the stroller frame according to any one of claims 5 and 6, wherein, The frame can be locked in the use position and / or storage position, preferably by means of a first locking element in the first and / or second hinge (5, 6), wherein the locking element and the unlocking device are preferably in a direct or indirect working connection.

8. The stroller frame according to any one of the preceding claims, particularly the stroller frame according to claim 7, wherein, The lock is automatically triggered when the location is reached for use and / or storage.

9. The stroller frame (10) according to any one of the preceding claims, wherein, At least the first and / or the second and / or the third frame element (1, 2, 3) can be selected from the front wheel bracket, the rear wheel bracket and the pusher section, wherein they are preferably selected from each other.

10. The stroller frame (10) according to any one of the preceding claims, the stroller frame having an infant receiving unit (20) comprising a back section (22) and a hip section (21), wherein, The back section (22) is preferably rotatably connected to and / or rotatably arranged relative to the buttocks section (21), wherein, in the storage position, the surfaces of the back section (22) and the buttocks section (21) that come into contact with the infant received in the infant receiving unit (20) are preferably abutting each other or opposite each other, especially with an angle between the surfaces of at least 2° and / or at most 50°.

11. The stroller frame (10) according to any one of the preceding claims, wherein, The baby receiving unit (20) is connected to the stroller frame (10) so that the baby receiving unit (20) changes from the use position to the storage position at the same time as the stroller frame (10).

12. The stroller frame (10) according to any one of the preceding claims, wherein, When changing from the storage position to the use position, the second angle range is at least 0.2 times and / or at most 0.8 times the first angle range, preferably at least 0.3 times and / or at most 0.7 times, and more preferably at least 0.4 times and / or at most 0.6 times, by the rotation and / or swing of the first frame element (1).

13. The stroller frame (10) according to any one of the preceding claims, wherein, The first angle range can be 140°-220°, preferably 160°-200°, more preferably 110°-240°, and especially 170°-190°.

14. A method for changing a stroller frame (10) according to claim 1 from a storage position to a use position, wherein, The first frame element (1) is rotated and / or flipped relative to the third frame element (3), and after the first frame element (1) reaches or exceeds the free travel angle (LW), the second frame element (2) is pulled in the first direction by the traction element (4).

Images