Stroller chassis

Abstract

A stroller chassis with a hub is disclosed. The stroller chassis includes a first frame assembly and a second frame assembly. The hub is configured to pivotally connect the first frame assembly to the second frame assembly about a pivot axis and releasably lockable relative to each other. The hub is configured to detachably and lockably support a load-bearing structure on the chassis. The hub is configured to pivotally support the load-bearing structure about a pivot axis relative to the chassis and lockably support the load-bearing structure in a rotatable position. A stroller chassis with a hub is also disclosed. The hub is configured to detachably and lockably support a load-bearing structure on the chassis. The hub is configured such that the load-bearing structure can be completely unlocked from the hub to allow disassembly to be facilitated by the operation of only one release component.

Description

[0001] This application is a divisional application of the patent application filed on December 8, 2021, with application number 202180082830.1 and invention title "Baby stroller chassis". Technical Field

[0002] This disclosure generally relates to a stroller chassis for use in a baby carriage. More precisely, this disclosure relates to a stroller chassis having a specific hub. Background Technology

[0003] Strollers have been used for transporting children for many years. Several strollers are known in the prior art, particularly those that allow them to be folded into a more compact size for storage or transport purposes. However, known strollers are generally cumbersome for users to carry. In particular, known strollers are especially difficult to carry for users with only one hand available for carrying purposes, for example, in situations where the user holds the child in one arm. Furthermore, known strollers allow for the attachment of different types of support structures (e.g., child seats, bassinets, or infant car seats). The support structure is configured for direct attachment to the stroller hub or can be attached to the stroller hub by means of one or more adapters. Components for locking and unlocking the support structure are typically located in the support structure and / or adapters. Therefore, the construction of such a support structure and / or adapter is complex because the moving parts of the locking arrangement must be located in the support structure or adapter. There are also locking arrangements for mounting the support structure to the stroller hub, which have some drawbacks regarding safety. For example, a known locking arrangement may enter a state where the support structure is permanently unlocked from the hub, yet the child remains seated within it. Summary of the Invention

[0004] An improved stroller chassis is needed that at least addresses the shortcomings described above. An improved stroller that can be folded, transported, and / or stowed away using only one hand is also needed.

[0005] According to this disclosure, a stroller chassis as described in independent claims 1 and 2 is provided. Advantageous further developments are the subject of the dependent claims.

[0006] Other desirable features and characteristics will become apparent from the summary, detailed description and appended claims obtained in conjunction with the accompanying drawings.

[0007] According to this disclosure, a stroller chassis with a hub is provided. The hub may include a first hub portion and a second hub portion. The first hub portion and the second hub portion may be arranged to be spaced apart from each other. The first hub portion and the second hub portion may be configured to support a load-bearing structure between them. The load-bearing structure may include a seat structure and / or adapters for connecting a seat structure to the hub. If the load-bearing structure is to be connected to multiple hub portions, the number of adapters may correspond to the number of hub portions. Thus, the load-bearing structure may include a seat structure without adapters, a seat structure with one or more adapters, or a seat structure without one or more adapters.

[0008] The stroller chassis may include a first frame assembly and a second frame assembly. The hub may be configured such that the first frame assembly and the second frame assembly are pivotally connected about a pivot axis and releasably locked relative to each other.

[0009] The stroller chassis may further include a locking mechanism for releasably establishing a lock between the first frame assembly and the second frame assembly. The locking mechanism may include an engagement member for preventing movement of the second frame assembly relative to the first frame assembly. Furthermore, the locking mechanism may include a release mechanism for at least releasing the engagement between the first and second frame assemblies. The release mechanism may be located on the second frame assembly and may allow remote release of the engagement between the first and second frame assemblies. The release mechanism may be operatively coupled to the locking mechanism by means of a force-transmitting member. The force-transmitting member may include a cable. The second frame assembly may include a handle portion that can be gripped by a user. The release mechanism may be located in the handle portion.

[0010] The hub may be configured to detachably and lockably support a load-bearing structure on a chassis. As previously described, the hub may include a first hub portion and a second hub portion. The first hub portion and the second hub portion may be arranged a distance apart from each other. The first hub portion and the second hub portion may be configured to support the load-bearing structure between them. The hub may be configured such that the load-bearing structure can be completely unlocked from the hub to allow disassembly of the load-bearing structure to be facilitated by the operation of only one release member. The hub may include a locking arrangement for releasably locking the load-bearing structure to the hub (e.g., on the first hub portion and the second hub portion). The locking arrangement may be configured such that the locking of the load-bearing structure to the hub (e.g., on the first hub portion and the second hub portion) can be released at least simultaneously. The locking arrangement may include a first engagement mechanism disposed in the first hub portion. The locking arrangement may include a second engagement mechanism disposed in the second hub portion. The locking arrangement may include a user-operable release member. The release member can be configured to return to a locked position by means of a return mechanism (e.g., a return spring mechanism), the return mechanism including an actuating member such as a spring for actuating the release member toward the locked position, such that the release member is normally positioned in the locked position. The release member is operatively coupled to a first engagement mechanism and a second engagement mechanism. The operation of the release member simultaneously releases the engagement in both engagement mechanisms. For example, the release member can be operatively coupled to the first and second engagement mechanisms by means of a force transmission mechanism. The force transmission mechanism may include at least an elongated member configured to transmit tensile force. The force transmission mechanism may include a wire. The release member may be disposed on one of a first hub portion and a second hub portion.

[0011] The hub can be configured to pivotally support the load-bearing structure about a pivot axis relative to the chassis and lockably in the rotatable position. A first hub portion and a second hub portion, both of which can rotate relative to the chassis, can be provided.

[0012] The stroller chassis may further include a crossbar member. For example, the hub may include the crossbar member. The crossbar member may be configured to at least partially house a force transmission mechanism. As previously mentioned, the force transmission mechanism may be a wire. Therefore, the crossbar member may be configured to suitably guide the force transmission mechanism therein. Alternatively or additionally, the crossbar member may include a handle that can be gripped by a user to carry the stroller. Alternatively or additionally, the crossbar member may be integrally formed with the first hub portion and the second hub portion. Alternatively or additionally, the crossbar member may be U-shaped.

[0013] The hub can be configured to reliably engage with a connecting portion of the load-bearing structure. In particular, the hub can be configured to reliably engage with the connecting portion such that moving the hub and the connecting portion relative to each other to move the hub and the connecting portion to the final engagement position is performed at least partially against the actuating force applied by the actuating member.

[0014] As previously mentioned, the hub may include a first hub portion and a second hub portion. The first hub portion may be configured to reliably engage with a first connecting portion of the load-bearing structure. The second hub portion may be configured to reliably engage with a second connecting portion of the load-bearing structure. The engagement between the respective hub portion and the respective connecting portion may be configured such that moving the respective hub portion and the respective connecting portion relative to each other to move the respective hub portion and the respective connecting portion to the final engagement position is performed at least partially overcoming the actuating force applied by the actuating member. Each of the first hub portion and the second hub portion may include an actuating member. The actuating member as described herein may include a spring mechanism. Each actuating member may be configured to apply an actuating force in the disengagement direction to a respective one of the connecting portions. The actuating member may be configured to provide an actuating force higher than the weight of the load-bearing structure. In the case of using multiple actuating members, the actuating members may be configured to jointly provide a combined actuating force higher than the weight of the load-bearing structure. With such a configuration, it is necessary to overcome the actuating force to move the connecting portion relative to the hub portion to the final engagement position. On the other hand, once the lock between the load-bearing structure and the hub is released, such a configuration will push the unloaded load-bearing structure upward. Together with the locking arrangement described above, a mechanism can be provided in which, in the case of a load-bearing structure, the load-bearing structure is automatically locked and securely held in place, as exemplarily described in the detailed description.

[0015] As previously mentioned, the hub may include a first hub portion and a second hub portion. Each of the first hub portion and the second hub portion may be arranged to be lockably rotatable relative to the chassis, for example, about a pivot axis. Alternatively or additionally, unlocking the first hub portion and the second hub portion to allow rotation relative to the chassis may be achieved by moving one of the first frame assembly and the second frame assembly relative to the other about a pivot axis.

[0016] The stroller chassis may further include locking arrangements for rotatably locking a hub (e.g., a first hub portion and a second hub portion) to at least one of a first frame assembly and a second frame assembly. Each locking arrangement may include an engagement portion. The engagement portion may be disposed on the first frame assembly. Each locking arrangement may include a receiving portion. The receiving portion may be disposed correspondingly on the first hub portion and the second hub portion. The engagement portion is movable between an engaged position and a disengaged position. For example, the engagement portion may translate. In the engaged position, the engagement portion may engage with the receiving portion, thereby preventing any rotational movement between the engagement portion and the receiving portion. In the disengaged position, the receiving portion is rotatable about a pivot axis relative to the engagement portion. Additionally or alternatively, the stroller chassis may further include a force transmission mechanism operatively coupled to the engagement portion to apply a force to the engagement portion so as to move the engagement portion at least from the engaged position to the disengaged position. The force transmission mechanism may be configured to convert rotational movement of one of the first frame assembly and the second frame assembly about a pivot axis and relative to the other of the frame assemblies into movement of the engagement portion, such as translational movement.

[0017] The force transmission mechanism may include a cam surface. The cam surface may extend about a pivot axis. The engagement portion may include an abutment portion. The abutment portion may be configured to contact the cam surface. The engagement portion may be pre-tensioned toward engagement by means of an actuating member. The actuating member may include a spring. The engagement portion may be configured for backlash-free engagement. The engagement portion may include a wedge shape or a circular shape. Additionally or alternatively, the engagement portion may be arranged to translate in a direction deflected relative to the extension direction of the pivot axis.

[0018] The hub may further include an abutment portion for orienting the first and second hub portions when one of the first and second frame assemblies moves about a pivot axis. The abutment portion may be movably coupled to one of the first and second frame assemblies. The abutment portion may be configured to contact and apply a force-receiving portion disposed on at least one of the first and second hub portions to automatically move the first and second hub portions from a potentially unfavorable position to a favorable position. An unfavorable position may be one where, during the folding process, particularly when the stroller chassis is folded and unfolded, the mounted support structure may interfere with portions of the stroller chassis. An favorable position may be one where the mounted support structure does not interfere with portions of the stroller chassis. In this way, the mounted support structure may be pre-positioned at least relative to the chassis for further rotation to an operating position. The abutment portion may be coupled to the second frame assembly so that it can rotate integrally with it about a pivot axis.

[0019] The adjacent portion can be configured such that when the first frame assembly and the second frame assembly are locked together, the adjacent portion defines a rotation stop for the first hub portion and the second hub portion, such that when the first hub portion and the second hub portion are rotated, causing the force receiving portion to contact the adjacent portion, the receiving portion aligns with the engaging portion. Therefore, in particular, clearance-free locking can be achieved through the cooperation of the adjacent portion acting as a stop along one rotational direction of the hub portion and the engaging portion acting as a stop at least along other rotational directions of the hub portion.

[0020] A further provision is provided for a stroller, which includes a stroller chassis according to any one of the preceding claims and a load-bearing structure detachably mountable to a hub.

[0021] Other features of the invention will become apparent from the information contained in or in combination with the detailed description, drawings and claims contained above and below. Attached Figure Description

[0022] The accompanying drawings, which are incorporated herein and form part of the specification, and together with the description, are used to explain the principles of the embodiments and to enable those skilled in the art to make and use the embodiments.

[0023] Figure 1 The diagram shows a perspective view of a stroller according to an embodiment, the stroller including a stroller chassis and a support structure mounted on the chassis.

[0024] Figure 2 show Figure 1 Another perspective view of the stroller, in which the supporting structure is shown in a disassembled state.

[0025] Figure 3 Display as shown Figure 1 and Figure 2 The image shows a side view of the connecting portion of the load-bearing structure.

[0026] Figure 4 The side view of the stroller is shown, wherein the supporting structure is oriented in a rearward direction and is in a folded state, wherein the backrest and bumper of the supporting structure are folded toward the seat base, and wherein the stroller chassis is in an unfolded operating state.

[0027] Figure 5 show Figure 1 A perspective view of a stroller, wherein the supporting structure is oriented in the forward direction, and wherein the supporting structure is in a folded state, wherein the backrest and the bumper bar are folded toward the seat base, and wherein the stroller chassis is in a folded-down or carried state.

[0028] Figure 6A perspective view of the hub of the stroller chassis according to an embodiment is shown.

[0029] Figure 7 show Figure 6 Front view of the hub.

[0030] Figure 8 A side view of the internal components of the hub according to an embodiment is shown, wherein the stroller chassis is in an unfolded state.

[0031] Figure 9 show Figure 8 The internal components of the hub, wherein the frame assemblies connected by the hub have rotated relative to each other. For example... Figure 9 The state shown in the image can be called the intermediate fold state because, Figure 9 This shows the state that occurs during the transition of the stroller chassis from the unfolded state to the folded state.

[0032] Figure 10 A perspective view of the hub portion according to an embodiment is shown.

[0033] Figure 11 show Figure 10 A plan view of the hub section, which has additional components of the hub of the stroller chassis.

[0034] Figure 12 Showing a cross-sectional view through the hub portion according to an embodiment.

[0035] Figure 13 and Figure 14 A cross-sectional view is shown through the hub portion according to an embodiment, wherein, Figure 13 This shows the state in which the connecting part of the load-bearing structure is locked to the hub part, and, Figure 14 This shows the state of the connection part of the load-bearing structure being unlocked from the hub.

[0036] Figure 15 An exploded view of the components of a hub according to an embodiment is shown.

[0037] The features and advantages of the embodiments will become more apparent from the detailed description given below, taken in conjunction with the accompanying drawings, in which the same reference numerals identify corresponding elements throughout. In the drawings, the same reference numerals generally indicate identical elements, functionally similar elements, and / or structurally similar elements. Detailed Implementation

[0038] Embodiments and modifications will be described below with reference to the accompanying drawings.

[0039] Figure 1 and Figure 2The stroller 1 is shown. The stroller 1 includes a stroller chassis 2 and a support structure 3. In some embodiments, the support structure 3 is embodied as or includes a seat structure for supporting a child. Therefore, in the following text, the support structure 3 will also be referred to as the seat structure 3. However, it should be noted that the support structure 3 does not necessarily have to include a seat structure. Alternatively, in addition to or as an alternative to a seat structure, the support structure may include an adapter that allows the seat structure to be secured to the support structure. The stroller chassis 2 includes a hub 30.

[0040] In some embodiments, the hub 30 includes multiple functions integrated within it. More precisely, according to an embodiment, the hub 30 combines at least three functions. A first function may be to detachably secure the seat structure 3 to the stroller chassis 2. A second function may be to rotatably secure the seat structure 3 to the stroller chassis 2. A third function may be the ability of the hub 30 to connect portions of the stroller chassis 2 to each other such that they are pivotable about a pivot axis and releasably locked relative to each other. Another function, in addition to one of the functions mentioned above or as an alternative, may be that the hub 30 is configured such that unlocking the seat structure 3 from the hub can be achieved by the operation of a single release component. All of the possible functions mentioned above will be described in more detail below. It should be noted that this disclosure is not limited to any of the combinations of functions described above. The functions mentioned above can be combined in a suitable manner. In some embodiments, only one of the functions mentioned above may be provided. In other embodiments, two or more of the functions mentioned above may be provided. Furthermore, the features of the stroller 1 described below can be suitably combined, and are not limited to any of the combinations that will be explained in the following exemplary embodiments.

[0041] The seat structure 3 may include a base portion 300. The base portion 300 may be configured to support the bottom of a child. The seat structure 3 may include a connecting portion 303 for connecting the seat structure 3 to the stroller chassis 2. The seat structure may be an integral part of the seat structure 3. The connecting portion may include or be configured as an adapter for connecting the seat structure 3 to a hub 30. The seat structure 3 may further include a backrest portion 301. The backrest portion 301 may be pivotally connected to the base portion 300 by means of the connecting portion 303, which may also be referred to as the seat hub. A safety bar arrangement 302 may be hingedly connected to the connecting portion 303. The safety bar arrangement 302 may also be referred to as a bumper bar and may be provided to form an openable and closable crossbar arrangement for securely holding a child within the seat structure 3. In one embodiment, the backrest portion 301 and the safety bar arrangement 302 can be pivotally connected to the connecting portion 303 to allow the backrest portion 301 and the safety bar arrangement 302 to be folded toward the base portion 300 for stowage purposes. The folded state of the seat structure 3 is as follows: Figure 4 and Figure 5 It is displayed in the middle.

[0042] Figure 3 Showing a side view of the connecting portion 303 of the seat structure 3. The connecting portion 303 may include a support member 305 and a first connecting section 304 for connecting the seat to the hub 30 mentioned above, and a second connecting section 306 for pivotally mounting the safety bar arrangement 302. The first connecting section 304 may include a wedge shape and may be configured to insert into a recess 33 provided in the hub 30. The seat structure 3 may further include a locking mechanism for braking the backrest 301 and the safety bar arrangement 302 at an angle relative to the base portion 300. To unlock the locking mechanism, as Figure 5 As shown, the operating member 307 is located in the upper portion of the backrest portion 301. The operating member 307 is operatively connected to a locking arrangement inside the connecting portion 303 and unlocks the backrest portion 301 so that it can rotate relative to the connecting portion 303. The locking mechanism is further configured such that when the backrest portion 301 reaches a predetermined rotational position when folded toward the base portion 300, the lock on the safety bar arrangement 302 is released. Therefore, by unlocking the backrest portion 301 via the operation of the operating member 307 and rotating the backrest portion 301 toward the base portion 300, the safety bar arrangement 302 is unlocked and can then also rotate toward the base portion 300. In this way, the main components of the seat structure 3 can be folded to achieve a compact size.

[0043] The stroller chassis 2 may include a first frame assembly 10 and a second frame assembly 20. The first frame assembly 10 may define a support structure for mounting the front wheel assembly 110. The first frame assembly 10 may include a frame 100. The frame 100 may be configured in a U-shape and may particularly include a plurality of elongated members interconnected with each other. The elongated members may at least partially include profiles, such as extruded profiles made of aluminum. Figure 1 In the embodiment shown, the frame 100 includes a first elongated side member 101, a second elongated side member 102, and an elongated transverse member 103. The elongated transverse member 103 connects a first end portion 104 of the first elongated side member 101 to a first end portion 105 of the second side member 102. In this embodiment, the elongated side members 101, 102, and the elongated transverse member 103 extend substantially in a plane. The elongated transverse member 103 includes mounting sections 106, 107, each configured to support a wheel assembly 110. Although two wheel assemblies 110 are shown in this embodiment, it is also possible to provide only one wheel assembly on the first frame assembly 10.

[0044] The second end portion 108 of the first elongated side member 101 and the second end portion 109 of the second elongated side member 102 are hingedly connected to the second frame assembly 20 by means of a hub 30. In an embodiment, the first frame assembly 10 may be pivotally connected to the second frame assembly 20 about a pivot axis A.

[0045] The second frame assembly 20 may include a frame 200. The frame 200 may be configured in a U-shape and may specifically include a plurality of elongated members interconnected with each other. The elongated members may at least partially comprise profiles, such as extruded profiles made of aluminum. Figure 1 In one embodiment, the frame 200 includes a first elongated side member 201, a second elongated side member 202, and an elongated transverse member 203. The elongated transverse member 203 connects a first end portion 204 of the first elongated side member 201 to a first end portion 205 of the second side member 202. In this embodiment, the elongated side members 201, 202, and the elongated transverse member 203 extend substantially in a plane. The second end portion 208 of the first elongated side member 201 and the second end portion 209 of the second elongated side member 202 are hingedly connected to the first frame assembly 10 by means of a hub 30. A handle portion 21 may be provided on the elongated transverse member 203. Furthermore, a release mechanism 6 may be provided on the elongated transverse member 203. In use, the elongated transverse member 203 is gripped by the user to push the stroller 1.

[0046] If already Figure 1 As indicated, the stroller chassis 2 further includes a locking mechanism 5 for releasably establishing a lock between the first frame assembly 10 and the second frame assembly 20. More precisely, such as in... Figure 1 Neutralization Figure 2 As shown, the locking mechanism 5 is configured to releasably lock the first frame assembly 10 and the second frame assembly 20 when the stroller chassis 2 is in the unfolded state. Details of the locking mechanism 5 will be described in more detail later. A release mechanism 6 is operatively coupled to the locking mechanism 5. Further details regarding the release mechanism 6 and its connection to the locking mechanism 5 will be given later.

[0047] The first frame assembly 10 and the second frame assembly 20 may be constructed and arranged such that, in the unfolded state of the stroller chassis 2, the first frame assembly 10 and the second frame assembly 20 extend substantially in one plane and form a substantially rectangular frame that allows the seat structure 3 to be received therein.

[0048] The stroller chassis 2 may further include a third frame assembly 80. The third frame assembly 80 may be configured to provide rear support for the stroller chassis 2 against the ground. For example, the third frame assembly 80 may be configured to support a rear wheel assembly 810 thereon. The third frame assembly 80 may include a frame 800. The frame 800 may be configured in a U-shape and may particularly include a plurality of elongated members interconnected with each other. The elongated members may at least partially include profiles, such as extruded profiles made of aluminum. For example, in… Figure 2 As shown, the frame 800 may include a first side portion 801, a second side portion 802, and an elongated transverse member 803. The elongated transverse member 803 allows a first end portion 804 of the first side portion 801 to be coupled to a first end portion 805 of the second side portion 802. The elongated side portions 801, 802, and the elongated transverse member 803 may extend substantially perpendicular to each other.

[0049] The first side portion 801 may include a first front elongated member 806 and a first rear elongated member 807. The first end portion 804 may be configured as a connecting member. The first front elongated member 806 is hingedly connected to the first end portion 804 at its first end portion 808. The first rear elongated member 807 is fixedly connected to the first end portion 804 at its first end portion 811. The first front elongated member 806 is hingedly connected to the first frame assembly 10 at its second end portion 809, more precisely, to the first elongated side member 101 at a predetermined distance from the pivot axis A. The first rear elongated member 807 is hingedly connected to the second frame assembly 20 at its second end portion 812, more precisely, to the first elongated side member 201 at a predetermined distance from the pivot axis A.

[0050] The second side portion 802 may include a second front elongated member 813 and a second rear elongated member 814. A first end portion 805 of the second side portion 802 may be configured as a connecting member. The second front elongated member 813 may be hingedly connected to the first end portion 805 at its first end portion 815. The second rear elongated member 814 may be fixedly connected to the first end portion 805 at its first end portion 816. The second front elongated member 813 is hingedly connected to the first frame assembly 10 at its second end portion 817, more precisely, to the second elongated side member 102 at a predetermined distance from the pivot axis A. The second rear elongated member 814 is hingedly connected to the second frame assembly 20 at its second end portion 818, more precisely, to the second elongated side member 202 at a predetermined distance from the pivot axis A.

[0051] Generally, the third frame assembly 80 includes kinematic features that allow the elongated transverse member 803 and any wheel assembly 810 to pivotally move toward the first frame assembly 10, thereby folding the stroller chassis 2. Such movement can be initiated by movement of the second frame assembly 20 due to the connection between the third frame assembly 80 and the second frame assembly 20 as described above. In the folded state of the stroller chassis 2, the third frame assembly 80 can be sandwiched between the first frame assembly 10 and the second frame assembly 20.

[0052] As previously mentioned, the stroller chassis 2 may include a hub 30, which is configured to pivotally connect the first frame assembly 10 to the second frame assembly 20 about a pivot axis A and releasably lock relative to each other. For this purpose, a locking mechanism 5 is provided. Reference will now be made to... Figure 6 The details of the locking mechanism 5 are described.

[0053] Figure 6 Showing a perspective view of a hub 30 according to an embodiment. The hub includes a first hub portion 31 and a second hub portion 32. The first hub portion 31 and the second hub portion 32 are arranged to be spaced apart from each other in the extension direction of the pivot axis A (e.g., in the lateral direction of the stroller 1). The hub portions 31, 32 may be configured to support the seat structure 3 between them, for example, in a suspended manner. The first hub portion 31 and the second hub portion 32 may be connected to each other by means of a crossbar member 50. The crossbar member 50 may include a grip handle 51 to allow a user to grip the grip handle 51 and carry the folded stroller 1 with or without a seat structure mounted to the hub 30. As previously mentioned, each of the first hub portion 31 and the second hub portion 32 may be configured as a connecting portion 303 connected to the seat structure 3. Each of the first hub portion 31 and the second hub portion 32 may therefore include a recess 33 for receiving a first connecting section 304.

[0054] Hub 30 is pivotally connected about pivot axis A to the first frame assembly 10 to the second frame assembly 20. Each of the second end portions 108 and 109 of the frame 100 of the first frame assembly 10 may include a connecting section 111 pivotally mounted on hub 30. Each of the second end portions 208 and 209 of the frame 200 of the second frame assembly 20 may include a connecting section 211 pivotally mounted on hub 30. Each of connecting sections 111 and 211 may be connected to each other by means of pivot pin 34. Each of connecting sections 111 and 211 may be arranged close to each other along pivot axis A such that they are in sliding contact. Each of connecting sections 111 and 211 may be formed substantially flat, at least in the region where connecting sections 111 and 211 may contact each other. Connecting sections 111 and 211 may be formed from a sheet of metal by cutting and bending. Connecting sections 111 and 211 can be locked to each other by means of a locking mechanism 5. The locking mechanism 5 functions through the cooperation of an engaging portion 112 and an engaging member 9 disposed in connecting section 111. The engaging member 9 is movably disposed on connecting section 211, for example in guide recess 214, and includes an engaging portion 213 that engages with engaging portion 112. The engaging member 9 can be pre-biased in the engagement direction by means of an actuating member 212, exemplarily embodied as a spring. In this way, the locking mechanism 5 can be configured to automatically engage with connecting section 111 once engaging portion 211 and engaging portion 112 are aligned relative to each other by rotating the second frame assembly 20 relative to the first frame assembly 10. The engaging member 9 can be configured to be remotely operable. For this purpose, the engaging member 9 is operatively coupled to a release mechanism 6. In an embodiment, the engaging member 9 is operatively coupled to the release mechanism 6 by means of a force transmission member 7. In an embodiment, the force transmission member 7 is a wire 8. However, other types of force transmission components 7 can be used. The release mechanism 6 may include an operating component, such as a button. In an alternative configuration, the operating component may include a rotatable handle. In this embodiment, the locking mechanism 5 is configured such that when the release mechanism 6 is operated, the engaging component 9 disengages from the engaging portion 112 against the actuating force of the actuating component 212. Once the engaging component 9 (more precisely, its engaging portion 213) disengages from the engaging portion 112, the first frame assembly 20 can rotate about the pivot axis A, and the folding of the stroller chassis 2 is possible.

[0055] Hub 30 may include locking arrangement 40. Figure 7The possible configurations of such a locking arrangement 40 are schematically shown. The locking arrangement 40 can be configured to releasably lock the support structure 3 (e.g., a seat structure as described herein, or an adapter configured to fit a particular seat structure size) onto the hub 30. If the hub 30 includes a first hub portion 31 and a second hub portion 32, the locking arrangement 40 can be configured to releasably lock the seat structure 3 onto the first hub portion and the second hub portion 32. The locking arrangement 40 can be configured such that the locks on the seat structure 3 onto the first hub portion 31 and the second hub portion 32 can be released at least simultaneously. In this way, a user can simultaneously unlock the seat structure 3 from both the first hub portion 31 and the second hub portion 32 using a single operating component. In other words, one side of the two hub portions 31, 32 and the two locking mechanisms 41, 42 can be operated. For this purpose, the locking component may include a release component 43 operable by the user. The locking arrangement 40 may include a first engagement mechanism 41 disposed in the first hub portion 31 and a second engagement mechanism 42 disposed in the second hub portion 32. The first coupling mechanism 41 and the second coupling mechanism 42 can be operatively connected to each other by means of a force transmission mechanism 44 (e.g., wire 45 or any other component that can be used to transmit tensile force).

[0056] Further details of the locking arrangement 40, and particularly the first engaging mechanism 41 and the second engaging mechanism 42, will now be referred to. Figures 12 to 14 And the description. Figures 12 to 14 A cross-sectional view of the first engagement mechanism 41 is shown. Note that the second engagement mechanism 42 is constructed similarly to the first engagement mechanism 41, but differs in that it does not include a release member 43 and is therefore not operable by the user. In contrast, the second engagement mechanism 42 can only be operated by the first engagement mechanism 41. Another difference between the first engagement mechanism 41 and the second engagement mechanism 42 may be the indicator portion 35 that may be provided in the second engagement mechanism 42. The indicator portion 35 serves to signal to the user whether the seat structure 3 is correctly inserted and locked in the hub 30 or the second hub portion 32. While the first hub portion 31 or the first seat engagement mechanism 41 may also include such an indicator portion, it should be noted that such an additional indicator portion can be omitted because the user can already determine the correct insertion and locking based on the position of the release member 43.

[0057] Each of the first engagement mechanism 41 and the second engagement mechanism 42 may include a support member 49, which is arranged to be rotatable about a pivot axis A. The support member 49 may be constructed as a thin member that may be plate-shaped or disc-shaped. An engagement portion 48 is provided on the support member 49. The support member 49 may be configured to automatically return to a locked position by means of a return mechanism 46 (see [link]). Figure 15The return mechanism 46 may include a return spring 47. In the first engagement mechanism 41, the release member 43 may be fixedly connected to the support member 49, for example, by means of a metal-reinforced connecting member 43a. Thus, movement of the release member 43 causes movement of the support member 49. In the second engagement mechanism 42, the release member 43 may be omitted. In the second engagement mechanism 42, the indicator portion 35 mentioned above may be provided. The indicator portion 35 may include an indicator element or indicator section, for example, provided on the radially outer surface of the support member 49. The indicator section may be colored, for example, green. To allow for easier manufacturing, the support member 49 in the second engagement mechanism 42 may be manufactured in green. An opening 36 may be provided in the hub portion 32. The opening 36 may be configured such that the indicator section (e.g., a portion on the support member 49) can be aligned with the opening 36, thereby indicating to the user that the support member 49 is in the correct position.

[0058] To allow simultaneous movement of the support members 49 in the first engagement mechanism 41 and the second engagement mechanism 42, the force transmission mechanism 44 operably connects the support members 49 to each other, such that the support members 49 are movably connected. In this way, movement of one support member 49 causes movement of the other support member 49. (As can be seen from...) Figure 12 As is understood, the locking arrangement 40 can be configured such that the engaging portion 48 can move from an engaging position in which the engaging portion 48 protrudes into the recess 33 to a retracted position in which the engaging portion 48 does not protrude into the recess 33. Figure 12 and Figure 13 The state of the first engagement mechanism 41 is shown, wherein the engagement portion 48 is in the engagement position. Figure 13 The arrangement shows that the connecting section 304 of the seat structure 3 is inserted into the recess 33 and engaged by the engaging portion 48. In this state, the connecting section 304 is locked to the hub portion. On the other hand, Figure 14 The following state is displayed: where the engagement portion 48 is in the retracted position, allowing the engagement section 304 to be unlocked from the hub portion and disassembled.

[0059] Also from Figures 12 to 14 Another feature that may be provided in the hub 30 (e.g., the first hub portion 31 and the second hub portion 32) is understood. As already described above, the hub 30 may be configured to be securely engaged with the connecting portion 303 of the support structure 3. In some embodiments, the hub 30 may be configured to be securely engaged with the connecting portion 303 of the seat structure 3, such that the hub 30 and the connecting portion 303 are moved relative to each other to move the hub 30 and the connecting portion 303 to a final engagement position (e.g., as shown in the image). Figure 13The final engagement position shown in the diagram is achieved at least partially by overcoming the actuating force applied by the actuating member 38. Each of the first hub portion 31 and the second hub portion 32 may include such an actuating member 38. The actuating member 38 may include a spring 39. The actuating member 38 may be located in the end portion of the recess 33 opposite to the insertion opening of the recess 33. Each actuating member 38 is configured to apply an actuating force in the disengagement direction to a corresponding one of the upper engagement sections 304. The disengagement direction may be a direction perpendicular to the pivot axis A. The actuating member 38 may be configured to provide an actuating force higher than the weight of the seat structure 3, such that the actuating force needs to be overcome to move the engagement section 304 of the seat structure 3 relative to the hub portions 31, 32 (particularly, relative to the recess 33) to the position shown in the diagram. Figure 13 The final connection location shown in the image. Figure 14This shows the initial contact state between the connecting section 304 and one of the actuating members 38. With this configuration, the user needs to apply a certain force to bring the seat structure 3 to the final connected position. Another effect of this configuration is that if the seat structure 3 is unlocked from the hub portions 31, 32 by operating the release member 43, the seat structure 3 can be automatically pushed upwards in the disengagement direction without supporting a child. The seat structure 3 can thus automatically move from the locked position to the unlocked position. In the unlocked position, the opening in the connecting section configured to receive the engaging portion 48 is offset relative to the engaging portion, so that the engaging portion cannot engage with the connecting section 304. On the other hand, if a child is seated in the seat structure 3, and therefore the weight acting on the hub portion is greater than the weight of the seat structure 3, the seat structure 3 will not move upwards to the unlocked position even if the release member 43 is operated. In other words, the loaded seat structure 3 will remain in the appropriate position. After this, the connecting section 304 (e.g., including the opening) remains in the appropriate position to engage with the engaging portion 48. If the support member 49 is configured to automatically return to the locked position by means of the return mechanism 46, then the seat structure 3 cannot be accidentally in an unlocked state due to erroneous operation of the release member 43, because the seat structure 3 will return to its locked position. Therefore, the locking arrangement can provide enhanced security by providing an arrangement in which the loaded seat structure is automatically locked and can only be removed if a force is continuously applied to release the locking mechanism (the operating force applied to the release member 43), or if the seat structure itself is unloaded, allowing the seat structure to be pushed upwards to the unlocked position by the actuating member 38. Note that the recess 33 may include a shape corresponding to the shape of the connecting section 304. As previously mentioned, the first connecting section 304 may include a wedge shape and may be configured to insert into the recess 33. In this case, the recess 33 may include a funnel shape or a hopper shape. Note that the use of the actuating member 38 described above does not necessarily have to be combined with the locking arrangement 40 as previously described. Such an actuating element 38 can also be used in a locking arrangement, wherein the lock in each hub portion is manually released by the operation of multiple release elements (e.g., one release element is present on each hub portion).

[0060] The force transmission mechanism may include a wire 45. Other components that allow the transmission of force (e.g., tension) can be used. Furthermore, the force transmission mechanism 44 may include a rigid component, such as an elongated rod. The end portions of the force transmission mechanism (e.g., the end portion of the wire 45) may be coupled to a first engagement mechanism 41 and a second engagement mechanism 42. The first engagement mechanism 41 may be disposed on a first hub portion 31, and the second engagement mechanism may be disposed on a second hub portion 32. For example, the end portions may be correspondingly coupled to the support member 49 mentioned above, such that movement of one support member causes a corresponding movement of the other. Figure 15 The following embodiment is shown: The support member 49 includes a connecting section 49a for securing the end portion of the wire, such that rotation of the support member 49 in the unlocking direction applies tension to the wire. A corresponding arrangement can be provided in the second engagement mechanism, wherein the difference is that the wire is connected to the support member such that when the wire is pulled by the movement of the support member 49 in the first engagement mechanism 41, the support member moves in the unlocking direction.

[0061] As previously mentioned, hub 30 may include crossbar member 50. Crossbar member 50 can increase rigidity of the entire stroller chassis 2. Crossbar member 50 extends at least partially parallel to pivot axis A. Crossbar member 50 may be configured to at least partially accommodate force transmission mechanism 44 of locking arrangement 40. In this way, force transmission mechanism can be concealed within stroller chassis 2. Crossbar member 50 may be configured to suitably guide the force transmission mechanism 44 therein.

[0062] Alternatively or concurrently, the crossbar component 50 may be integrally formed with the first hub portion 31 and the second hub portion 32, such that portions of the hub portions and portions of the crossbar component may be produced as a single part, for example, by injection molding. Alternatively, the crossbar component 50 may be a separate component fixedly coupled to the first hub portion 31 and the second hub portion 32 so as to be movable integrally with the hub portions. If the crossbar component is rotatable integrally with the first hub portion 31 and the second hub portion 32, rotation of the seat structure 3 mounted on the hub portion causes rotation of the crossbar component 50. In this way, the crossbar component 50 can rotate together with the seat structure 3, such that when the stroller 1 is folded, the crossbar component 50 can automatically move or rotate to a position suitable for gripping the crossbar component 50 and carrying the folded stroller 1. In some embodiments, the crossbar component 50 is provided such that, in addition to the possible features of the crossbar component 50 described above, or as an alternative, it may include a grip handle 51 specifically designed to be gripped by a user for carrying the stroller 1.

[0063] Alternatively, the crossbar member 50 may be U-shaped. For example, the crossbar member 50 may be configured such that it extends primarily parallel to the pivot axis A and is located at a predetermined distance from the pivot axis A. In this way, the seat structure can be installed such that a portion of the seat structure (e.g., a portion of the base portion 300) is located below the pivot axis A. In other words, a portion of the seat structure 3 can be accommodated within the U-shape of the crossbar member 50. In this way, the center of gravity is lowered.

[0064] Hub 30 may be configured such that the seat structure 3 connected to hub 30 is lockably rotatable relative to stroller chassis 2 about pivot axis A. For this purpose, first hub portion 31 and second hub portion 32 may be arranged to be lockably rotatable relative to chassis 2 about pivot axis A. Alternatively, unlocking first hub portion 31 and second hub portion 32 to allow rotation of first hub portion 31 and second hub portion 32 may be achieved by moving one of first frame assembly 10 and second frame assembly 20 relative to the other of first frame assembly 10 and second frame assembly 20 about pivot axis A.

[0065] The stroller chassis 2 may include a locking arrangement 4 for locking hubs 30 (e.g., each of the first hub portion 31 and the second hub portion 32) to at least one of the first frame assembly 10 and the second frame assembly 20 in a rotational manner. The locking arrangement 4 and its function will be referenced in... Figures 8 to 11 The locking arrangement 4 may include an engagement portion 11. In some embodiments, the engagement portion 11 may be disposed on the first frame assembly 10 and received in a recess 16 of the inner housing portion 14. The inner housing portion 14 may form a housing for the member of the locking arrangement 4 together with the outer housing portion 15. The locking arrangement 4 may further include a receiving portion 61. The receiving portion 61 may be disposed correspondingly on the first hub portion 31 and the second hub portion 32. For example, the receiving portion 61 may be a portion of a support member 60 of the respective hub portion, for example, fixedly connected by a threaded connection. The receiving portion 61 may be integrally formed with the support member 60. The receiving portion 61 may include a recess for at least partially receiving the engagement portion 11. The engagement portion 11 is movably disposed (e.g., translationally movable) between an engaged position and a disengaged position. In the engaged position, the engagement portion 11 engages with the receiving portion 61, thereby preventing any rotational movement between the engagement portion 11 and the receiving portion 61. In the disengaged position, the receiving portion 61 is able to rotate relative to the engaging portion 11 about the pivot axis A.

[0066] The locking arrangement 4 may additionally or alternatively include a force transmission mechanism 90, operatively coupled to the engagement portion 11 to apply force to the engagement portion 11 so as to move the engagement portion 11 at least from an engaged position to a disengaged position. The force transmission mechanism 90 may be configured to convert a rotational movement P of one of the first frame assembly 10 and the second frame assembly 20 about a pivot axis A and relative to the other of the frame assemblies into a movement T of the engagement portion 11, such as a translational movement.

[0067] The force transmission mechanism 90 may include a cam surface 22 extending about a pivot axis A. The cam surface 22 may be disposed on the aforementioned connecting section 211 and positioned facing the engaging portion 11. The cam surface 22 may be oriented in a direction opposite to the pivot axis A. The engaging portion 11 may include an abutment portion 13 configured to contact and straddle the cam surface 22. The engaging portion 11 may be pre-tensioned toward engagement by means of an actuating member 12 (e.g., a spring). The cam surface 22 may be configured such that the distance between the contact area of ​​the cam surface 22 aligned with the engaging portion 11 and the pivot axis A may vary with rotation of the second frame member 20 about the pivot axis A. In this manner, the engaging portion 11 may be pushed by the cam surface to move in a disengagement direction. Figure 9 The following state is displayed: The engaging member 11 has been partially pushed out of the receiving portion 61 due to the relative movement of the cam surface 22 relative to the engaging member 11. As the second frame assembly 20 moves along... Figure 9 The cam surface 22 will be positioned so that the engaging part 11 is completely removed from the receiving part 61 when the cam is rotated further counterclockwise (in other words, along the folding direction). In this state, the hub part can rotate freely about the pivot axis A.

[0068] Figure 11The diagram shows the state in which the first hub portion 31 is rotated relative to the chassis 2. The adjacent portion 13 of the engaging member 11 contacts the outer surface portion 37 of the first hub portion 31, and the receiving portion 61 is located at a different rotational position. The first hub portion 31 can therefore rotate about the pivot axis A, wherein the adjacent portion 13 contacts the outer surface portion 37. If the stroller chassis 2 is folded, the second frame assembly 20 is in a position relative to the first frame assembly, wherein the cam surface 22 is rotated to a position in which the engaging portion is prevented from entering the receiving portion 61. For example, the cam surface 22 may be positioned such that its surface portion is arranged at a radial distance from the pivot axis A, which is greater than the distance of the opening of the receiving portion 61 from the pivot axis A. Therefore, as long as the stroller chassis 2 is folded, the engaging member 11 cannot enter the receiving portion. For example, the cam surface 22 may provide a surface that bridges the receiving portion 61 or its opening in the hub portion. Thus, the hub portion can be rotated past a position where the insertion-direction engaging member 11 and the receiving portion 61 are aligned in rotation for proper engagement with each other. On the other hand, if chassis 2 is in such a state as, for example Figure 1 , Figure 2 , Figure 6 as well as Figure 8 In the unfolded configuration shown, the cam surface 22 rotates to a position where it does not obstruct the engagement member 11 from entering the receiving portion 61. In such a configuration, when the hub portion rotates to a position where the engagement member and the receiving portion 61 are aligned, the engagement member can snap into the receiving portion.

[0069] The receiving portion 61 and the connecting section 211 may include plate-shaped or disc-shaped portions rotatable about a pivot axis A and arranged adjacent to each other along the extension direction of the pivot axis A. A portion of the receiving portion 61 and / or the support member 60 may be in sliding contact with the connecting section 211. Therefore, the support member 60 and the connecting section 211 may overlap each other. The receiving portion 61 includes a predetermined thickness along the extension direction of the pivot axis A, and the connecting section 211 includes a specific thickness along the extension direction of the pivot axis A. The engaging member 11 includes a thickness and is positioned such that it contacts a cam surface 22 on the receiving portion 61 and the connecting section 211. For example, the engaging member 11 may include a thickness greater than that of either the receiving portion or the connecting section 211.

[0070] The engagement portion 11 may be configured for clearance-free engagement. The engagement portion 11 may include a wedge shape or a circular shape. The engagement portion 11 may additionally or alternatively be arranged to be translatably movable along direction D, which may be oblique and / or perpendicular to the extension direction of the pivot axis A.

[0071] Hub 30 may further include an abutment portion 23 for orienting the first hub portion 31 and the second hub portion 32 when one of the first frame assembly 10 and the second frame assembly 20 moves about a pivot axis A. The abutment portion 23 may be movably coupled to one of the first frame assembly 10 and the second frame assembly 20. In an embodiment, the abutment portion 23 is fixedly coupled to a connecting section 211 of the second frame 200 so that it can rotate integrally therewith. The abutment portion 23 may be provided on the side of the connecting section 211 on which a support member 60 is disposed. The abutment portion 23 may include a cylindrical pin projecting from the connecting section 211.

[0072] The adjacent portion 23 may be configured to contact a force-receiving portion 62 disposed on at least one of the first hub portion 31 and the second hub portion 32 and to apply force to the force-receiving portion 62, so that the first hub portion 31 and the second hub portion 32 are automatically moved from a potentially unfavorable position where the seat structure 3 mounted therein may interfere with a portion of the stroller chassis 2 (e.g., a position where a portion of the backrest 301 contacts the elongated transverse member 803 and prevents the unfolding movement of the third frame assembly 80) to an advantageous position such that the mounted seat structure 3 is at least pre-positioned relative to the chassis 24 and allows further rotation to an operating position. The force-receiving portion 62 may be disposed on the support member 60. For example, the force-receiving portion 62 may be integrally formed with the support member 60.

[0073] The abutment portion 23 can be coupled to the second frame assembly 20 so that it can rotate integrally with it about the pivot axis A. The abutment portion 23 can be configured such that when the first frame assembly 10 and the second frame assembly 20 are locked to each other, for example by means of engagement of the engagement member 9 and the engagement portion 112 described above, the abutment portion 23 defines a rotation stop for the first hub portion 31 and the second hub portion 32. The abutment portion 23 is positioned such that when the first hub portion 31 and the second hub portion 32 rotate, such that the force receiving portion 62 contacts the abutment portion 23, the receiving portion 61 aligns with the engagement portion 11. Figure 8 In the embodiment shown, the adjacent portion 23 provides a stop for the support member 60 (more precisely, the force receiving portion 62) to prevent movement of the support member 60 and the hub portion 31 connected to the support member 60 in a counterclockwise direction. In this way, the play in the locking arrangement 4 is further reduced. As previously mentioned, the engagement direction of the engaging member 11 into the receiving portion 61 may be deflected relative to the pivot axis A. For example, the engagement direction of the engaging member 11 may include a directional component facing a direction opposite to the direction of rotation in which the adjacent portion 23 does not prevent rotation of the support member 60. In other words, the engagement direction of the engaging member 11 may allow the engaging member 11 to push the support member 60 along the direction of the adjacent portion 23. For example, the engaging member 11 may be arranged to be able to move along the direction of the extended and locked state of the stroller chassis (e.g., in the case of...). Figure 8 The hub moves translatably along the axis of pivot axis A and the axis of the adjacent portion 23 above. The specific orientation of the movement direction of the adjacent portion 23 and the engaging member 11 allows the hub to be engaged to the stroller chassis 2 without any play between them.

[0074] At least one of the hub portions 31, 32 may be configured such that the seat structure 3 mounted to the hub portions 31, 32 will not swing when the stroller is carried in a folded configuration and the crossbar is positioned in the carrying position. For this purpose, a snap-fit ​​engagement may be provided between the hub portions 31, 32 and one of the frame assemblies 10, 20 when the hub portions 31, 32 are in a predetermined rotational position relative to the frame assemblies 10, 20 (e.g., a predetermined rotational position relative to the connecting section 211). For example, the connecting section 211 may include at least one (preferably two) recesses 24, 25 or openings arranged on opposite sides of the pivot axis A. A spring-loaded engagement member 70 (such as a pin) may be provided on the hub portion and may be received, for example, in the recess 71 so that it can be moved in a direction parallel to the pivot axis A and toward and away from the connecting section.

[0075] The engaging member 70 can be pre-biased for engagement, for example, such that the engaging member 70 is pushed on the connecting section 211 (more precisely, on the surface of the connecting section 211 facing the hub, particularly on the surface perpendicular to the pivot axis A). Once one of the recesses 24, 25 is aligned with the engaging member 70, the engaging member 70 can engage with the recess and lock the hub to the connecting section 211 in terms of rotation. The engaging member 70 and the recess can be configured such that disengagement can be automatically achieved by applying a rotational force (particularly a rotational force above a predetermined threshold force) to one of the connecting sections or the hub. Upon application of the predetermined rotational force, the engaging member 70 can be pushed out of the recess. In other words, the recess and the engaging member can be shaped such that rotation of the connecting section 211 relative to the hub is converted into movement of the engaging member 70 away from the recesses 24, 25.

[0076] exist Figure 15 The embodiment is shown in an exploded view. This exploded view provides insight into some of the components mentioned above, their functions, operative connections, and positions within the hub.

[0077] The folding process of the stroller 1 according to an embodiment will be described below. First, the user must remove the seated child from the seat structure 3. Afterward, the user can operate the operating component 307 to unlock the backrest portion 301 for folding. The user then rotates the backrest portion 301 toward the base portion 300. When the backrest portion 301 is moved toward the base portion 300, the safety bar arrangement 302 is unlocked and also rotates toward the base portion 300. Figure 4 The image shows that seat structure 3 is in a folded configuration. However, it should be noted that... Figure 4 In the configuration shown, the hub remains locked relative to the stroller chassis 2 and cannot rotate relative to the stroller chassis 2. Following this action, the user can now operate the release mechanism 6 to unlock the locking mechanism 5, allowing the second frame assembly 20 to rotate relative to the first frame assembly 10. The user then rotates the second frame assembly 20 downwards. This movement pushes the engaging member 11 to disengage from the receiving part 61, thus unlocking the hub from the stroller chassis 2. Once the hub is unlocked from the chassis 2, rotation of the hub relative to the stroller chassis 2 is permitted. After this, the seat structure 3 rotates downwards to a balanced position, wherein the folding part of the seat structure points downwards. This rotation of the seat structure along with the hub causes the crossbar member 50 to rotate to a carrying position. The user can now grasp the crossbar member 50, and the stroller chassis 2 will fold completely to a compact size. In this folding configuration, the engaging member 70 engages with the frame assembly 20 to provide a temporary lock for carrying purposes, specifically preventing the folded seat structure from easily rotating relative to the folded chassis 2. Due to the stroller's design, folding and unfolding the stroller can be performed using only one hand. To unfold the stroller 1, the user can simply grasp the handle portion 21 and rotate the second frame assembly 20 away from the first frame assembly to a position where the first and second frame assemblies are locked by the locking mechanism 5. In this state, the engaging member 11 on the hub is pre-biased, but not necessarily aligned with the receiving portion 62. The seat structure 3 can now be rotated by the user, for example, by grasping and moving the backrest portion 301, until the engaging member 11 engages with the receiving portion 62.

[0078] In summary, it should be noted that terms such as "comprising" are not intended to exclude the provision of additional elements or steps. Furthermore, it should be noted that "a" or "an" does not exclude a plurality. Additionally, features described in conjunction with different embodiments may be combined with each other as desired. It should also be noted that reference numbers in the claims are not intended to be construed as limiting the scope of the claims. Moreover, while at least one exemplary embodiment has been presented in the foregoing overview and detailed description, it should be recognized that numerous variations exist.

[0079] It should also be understood that one or more exemplary embodiments are merely examples and are not intended to limit the scope, applicability, or construction in any way. Rather, the foregoing overview and detailed description will provide those skilled in the art with convenient strategies for implementing the exemplary embodiments, and to understand that various changes may be made to the function and arrangement of the elements described in the exemplary embodiments without departing from the scope set forth in the appended claims and their legal equivalents.

Claims

1. A stroller chassis (2) having a hub (30), in, The hub (30) is configured to detachably and lockably support the load-bearing structure (3) on the chassis (2), and The hub (30) is configured such that the load-bearing structure (3) can be completely unlocked from the hub (30) to allow disassembly to be facilitated by the operation of only one release component (43) of the chassis.

2. The stroller chassis (2) according to claim 1, wherein, The hub (30) includes: A first hub portion (31) and a second hub portion (32) are arranged apart from each other and configured to support the load-bearing structure (3) between them, wherein the hub (30) includes a locking arrangement (40) for releasably locking the load-bearing structure (3) onto the first hub portion (31) and the second hub portion (32).

3. The stroller chassis (2) according to claim 2, wherein, The locking arrangement (40) is configured such that the locks on the bearing structure (3) on the first hub portion (31) and the second hub portion (32) can be released at least simultaneously.

4. The stroller chassis (2) according to any one of claims 1 to 3, wherein, The release component (43) is arranged on only one side of the stroller chassis (2).

5. The stroller chassis (2) according to claim 4 when dependent on claim 2, wherein, A single release component (43) is disposed on the first hub portion (31) or the second hub portion (32).

6. The stroller chassis (2) according to any one of the preceding claims, wherein, The hub (30) is configured to reliably engage with the connecting portion (303) of the load-bearing structure, such that moving the hub (30) and the connecting portion (303) relative to each other to move the hub (30) and the connecting portion (303) to the final engagement position is performed at least partially against the actuating force applied by the actuating member (38).

7. The stroller chassis (2) according to claim 6, wherein, Release components (43) are located on both sides of the stroller chassis (2).

8. The stroller chassis (2) according to claim 2, wherein, The locking arrangement (40) includes a first engagement mechanism (41) disposed in the first hub portion (31) and a second engagement mechanism (42) disposed in the second hub portion (32), the first engagement mechanism (41) and the second engagement mechanism (42) each including an engagement portion (48) which is movable from an engagement position in which the engagement portion (48) prevents the load-bearing structure (3) from being disassembled from the chassis (2) to a retracted position in which the engagement portion (48) allows the load-bearing structure (3) to be disassembled from the chassis (2), wherein the first engagement mechanism (41) and the second engagement mechanism (42) are operatively connected to each other by means of a force transmission mechanism (44).

9. The stroller chassis (2) according to claim 8, wherein, The release component (43) is configured to return to the locked position by means of a return mechanism (46), which preferably includes a return spring (47).

10. The stroller chassis (2) according to any one of the preceding claims, wherein, The stroller chassis (2) includes a first frame assembly (10) and a second frame assembly (20), wherein the hub (30) is configured to pivotally and releasably lock relative to each other to connect the first frame assembly (10) to the second frame assembly (20) about a pivot axis (A), and / or The hub (30) is configured to pivotally support the load-bearing structure (3) about the pivot axis (A) relative to the chassis (2) and lockably in the rotational position.

11. The stroller chassis (2) according to claim 8, wherein, The locking arrangement (40) may include a release member (43) operable by a user, wherein the force transmission mechanism (44) may include a wire (45) such that operation of the release member (43) simultaneously releases engagement in two engagement mechanisms (41, 42), wherein the release member (43) may be disposed on one of the first hub portion (31) and the second hub portion (32).

12. The stroller chassis (2) according to claim 11, wherein, The hub (30) further includes a crossbar member (50), wherein the crossbar member (50) is configured to at least partially accommodate the force transmission mechanism (44).

13. The stroller chassis (2) according to claim 6 when dependent on claim 2, wherein, The first hub portion (31) is configured to be reliably connected to a first connecting section (304) of the support structure (3), and the second hub portion (32) is configured to be reliably connected to a second connecting section of the support structure (3), wherein each of the first hub portion (31) and the second hub portion (32) may include the actuating element (38), such as a spring mechanism, wherein each actuating element (38) is configured to apply an actuating force to a corresponding one of the connecting sections (304) in a disengagement direction, wherein the actuating element (38) is configured to provide a combined actuating force higher than the gravity of the support structure (3), such that the actuating force needs to be overcome to move the connecting section (304) relative to the hub portions (31, 32) to the final connected position.

14. The stroller chassis (2) according to claim 2, wherein, Each of the first hub portion (31) and the second hub portion (32) is arranged to be lockably rotatable relative to the chassis (2) about the pivot axis (A), and / or wherein unlocking the first hub portion (31) and the second hub portion (32) to allow the first hub portion (31) and the second hub portion (32) to rotate is achieved by moving one of the first frame assembly (10) and the second frame assembly (20) relative to the other about the pivot axis (A).

15. A stroller (1) comprising a stroller chassis (2) according to any one of the preceding claims and a load-bearing structure (3) detachably mountable to the hub (30).

Images