Child travel system

Abstract

A travel system includes a stroller frame having at least one seat attachment hub, at least one wheel, and a handle frame. The handle frame is movable between a use position and a storage position. A baby car seat is removably connected to the at least one seat connection hub. When the handle frame is in the storage position, the handle frame is positioned between the at least one seat connection hub and the at least one wheel.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefits of U.S. Application No. 63 / 580,768, filed September 6, 2023, and U.S. Application No. 63 / 685,855, filed August 22, 2024, both of which are incorporated herein by reference in their entirety. Technical Field

[0003] This disclosure relates to a transportation system for carrying children, and more specifically, to a transportation system that can accommodate growing children. Background Technology

[0004] The child mobility system includes a child seat that attaches to a stroller (also known as a baby carriage). The stroller includes a frame with mounting or connecting portions for attaching the child seat to the frame. The child seat accommodates a child, and caregivers can use the mobility system to push the child. Depending on the configuration, the child seat can support infants or toddlers.

[0005] The foregoing background discussion is intended to assist the reader only. It is not intended to limit the innovations described herein. Therefore, the foregoing discussion should not be construed as indicating that any particular component of a prior system is unsuitable for use with the innovations described herein, nor is it intended to indicate that any component is essential for implementing the innovations described herein. Summary of the Invention

[0006] According to one embodiment, a mobility system includes a stroller frame having at least one seat-connecting hub, at least one wheel, and a handle frame. The handle frame is movable between a use position and a storage position. A baby car seat is detachably connected to the at least one seat-connecting hub. When the handle frame is in the storage position, it is positioned between the at least one seat-connecting hub and the at least one wheel.

[0007] In addition to one or more of the features described above, or as an alternative, in another embodiment, the handle frame further includes an upper portion and a lower portion. The upper portion is pivotally coupled to the lower portion about a hinge axis.

[0008] In addition to one or more of the features described above, or as an alternative, in another embodiment, when the handle frame is in the use position, the upper portion is coplanar with the lower portion, and when the handle frame is in the storage position, the upper portion is folded relative to the lower portion about the hinge axis.

[0009] In addition to one or more of the features described above, or as an alternative, in another embodiment, the upper portion is parallel to the lower portion in the storage location.

[0010] In addition to one or more of the features described above, or as an alternative, in another embodiment, the stroller frame may switch between an unfolded configuration and a folded configuration. The handle is in the storage position in both the unfolded and folded configurations.

[0011] In addition to one or more of the features described above, or as an alternative, in another embodiment, the handle frame is in the use position when the stroller frame is in the unfolded configuration, and the handle frame is in the storage position when the stroller frame is in the folded configuration.

[0012] In addition to one or more of the features described above, or as an alternative, in another embodiment, the stroller frame stands upright when in the folded configuration.

[0013] In addition to one or more of the features described above, or as an alternative, in another embodiment, the front support leg frame is pivotally coupled to the rear support leg frame. When the stroller frame is in the unfolded configuration, the front support leg frame is spaced apart from the rear support leg frame. When the stroller frame is in the folded configuration, the front support leg frame is adjacent to the rear support leg frame.

[0014] In addition to one or more of the features described above, or as an alternative, in another embodiment, the stroller frame may be further converted into a luggage configuration, and when the stroller frame is in the luggage configuration, the handle frame is in the storage position.

[0015] In addition to one or more of the features described above, or as an alternative, in another embodiment, the front support leg frame is spaced apart from the rear support leg frame when the stroller frame is in the luggage configuration.

[0016] In addition to one or more of the features described above, or as an alternative, in another embodiment, the stroller frame includes a wheel swivel lock. The wheel swivel lock is switchable between a locked position and an unlocked position, in which rotation of at least one wheel about a vertical axis is prevented, and in the unlocked position, at least one wheel can rotate freely about the vertical axis.

[0017] In addition to one or more of the features described above, or as an alternative, in another embodiment, the stroller frame may switch between an unfolded configuration and a luggage configuration. When the stroller frame is in the unfolded configuration, the wheel swivel lock is in the locked position, and when the stroller frame is in the luggage configuration, the wheel swivel lock is in the unlocked position.

[0018] In addition to one or more of the features described above, or as an alternative, in another embodiment, the actuator is operatively coupled to the wheel rotary lock to cause the wheel rotary lock to shift between the locked position and the unlocked position. The handle frame serves as the actuator.

[0019] In addition to one or more of the features described above, or as an alternative, in another embodiment, rotation of the handle frame can be used to cause the wheel rotation lock to change between the locked position and the unlocked position.

[0020] According to one embodiment, a mobility system includes a stroller frame, a first child seat detachably connected to the stroller frame, a second child seat detachably connected to the stroller frame, and a third child seat detachably connected to the stroller frame. The first child seat is configured to support a first child having a first size range, the second child seat is configured to support a second child having a second size range, and the third child seat is configured to support a third child having a third size range. The first size range, the second size range, and the third size range are different from each other.

[0021] In addition to one or more of the features described above, or as an alternative, in another embodiment, the first child seat is an infant car seat.

[0022] In addition to one or more of the features described above, or as an alternative, in another embodiment, the second child seat is a toddler car seat.

[0023] In addition to one or more of the features described above, or as an alternative, in another embodiment, the second child seat may be connected to the stroller frame in both forward-facing and rear-facing modes.

[0024] In addition to one or more of the features described above, or as an alternative, in another embodiment, the stroller frame is foldable when the second child seat is attached to the stroller frame.

[0025] In addition to one or more of the features described above, or as an alternative, in another embodiment, the third child seat is a toddler seat, and the third size range is larger than the second size range.

[0026] In addition to one or more of the features described above, or as an alternative, in another embodiment, the stroller frame includes at least one seat-connecting hub. The at least one seat-connecting hub is detachably connected to at least one of the first child seat, the second child seat, and the third child seat.

[0027] In addition to one or more of the features described above, or as an alternative, in another embodiment, the at least one seat connecting hub is configured to be detachably coupled to a rigid portion of at least one of the first child seat, the second child seat, and the third child seat.

[0028] In addition to one or more of the features described above, or as an alternative, in another embodiment, the at least one seat-connecting hub includes a first pair of seat-connecting hubs positioned around the stroller frame.

[0029] In addition to one or more of the features described above, or as an alternative, in another embodiment, the first pair of seat connecting hubs are detachably connected to the first child seat only.

[0030] In addition to one or more of the features described above, or as an alternative, in another embodiment, the stroller frame includes a second pair of seat-connecting hubs. The second pair of seat-connecting hubs are detachably connected to at least one of the first child seat, the second child seat, and the third child seat.

[0031] In addition to one or more of the features described above, or as an alternative, in another embodiment, the second pair of seat connecting hubs is longitudinally offset from the first pair of seat connecting hubs.

[0032] In addition to one or more of the features described above, or as an alternative, in another embodiment, the second pair of seat connecting hubs are bayonet-type.

[0033] In addition to one or more of the features described above, or as an alternative, in another embodiment, the at least one seat connecting hub includes a receiving feature, and at least one of the first child seat, the second child seat, and the third child seat includes an engagement feature that can be received within the receiving feature to detachably couple at least one of the first child seat, the second child seat, and the third child seat to the stroller frame.

[0034] This invention provides a simplified description of a series of concepts. This invention is not intended to identify key or essential features of the claimed subject matter, nor is it intended to limit the scope of the claimed subject matter. Furthermore, the claimed subject matter is not limited to addressing any or all of the shortcomings mentioned in any part of this disclosure. Attached Figure Description

[0035] The following description should not be construed as limiting in any way. Referring to the accompanying drawings, like elements are numbered the same: Figure 1A A perspective view of a stroller frame in an unfolded configuration according to an embodiment of a child mobility system; Figure 1B According to one embodiment Figure 1A Side view of the stroller frame; Figure 2 According to one embodiment, it is in a folded configuration Figure 1A and 1B A perspective view of the stroller frame; Figure 3 A perspective view of a first child seat attached to a stroller frame according to an embodiment; Figure 4 A detailed perspective view of at least one seat connecting wheel hub of a stroller frame according to an embodiment; Figure 5A A side view of a stroller frame with a first child seat attached according to an embodiment; Figure 5B According to one embodiment Figure 5A A cross-sectional view of the interface between the first child seat and the stroller frame; Figure 6 A detailed perspective view of another seat connecting to a wheel hub of a stroller frame according to one embodiment; Figure 7A A side view of a stroller frame with a first child seat attached according to an embodiment; Figure 7B According to one embodiment Figure 7A A cross-sectional view of the interface between the first child seat and the stroller frame; Figure 8A A perspective view of a second child seat attached to a stroller frame in a forward-facing position according to an embodiment; Figure 8B A perspective view of a second child seat attached to a stroller frame in a rearward position according to an embodiment; Figure 9 A perspective view of a second child seat attached to a stroller frame in a forward-facing position when the stroller frame is in a folded configuration, according to an embodiment. Figure 10 A perspective view of a third child seat attached to a stroller frame in a forward-facing position according to an embodiment; Figure 11 A perspective view of a first child seat attached to a stroller frame when the stroller frame is in luggage configuration, according to an embodiment; Figure 12A A side view of a stroller frame in an unfolded configuration according to an embodiment; Figure 12B According to one embodiment Figure 12A Detailed view of the swivel lock on the wheels of the stroller frame; Figure 13A This is a side view of a stroller frame according to an embodiment, when the handle frame is rotated from the use position to the storage position; and Figure 13B According to one embodiment Figure 13A Detailed view of the wheel swivel lock of the stroller frame. Detailed Implementation

[0036] This disclosure relates to a mobility system for accommodating growing children. The system includes a stroller frame that can be connected to child seats of various sizes. The stroller can receive infant car seats, first toddler seats, and second toddler seats. The mobility system can be used to transport children as they grow from infancy to toddlerhood.

[0037] Referring now to Figure 1, an example of a stroller frame 20 of a child mobility system 10 is shown. As shown, the stroller frame 20 may have a handle frame 22, a front support leg frame 24, and a rear support leg frame 26. Each of the handle frame 22, the front support leg frame 24, and the rear support leg frame 26 may have a generally symmetrical configuration, comprising two parallel side sections respectively located on the left and right sides of the child mobility system 10. For example, the handle frame 22 includes a first handle side section 28a located on the left side of the stroller frame 20 and a second handle side section 28b located on the right side of the stroller frame 20. The front support leg frame 24 may include a first front support leg side section 30a located on the left side of the stroller frame 20 and a second front support leg side section 30b located on the right side of the stroller frame 20. Similarly, the rear support leg frame 26 may include a first rear support leg side section 32a disposed on the left side of the stroller frame 20 and a second rear support leg side section 32b disposed on the right side of the stroller frame 20.

[0038] A first front wheel 34a may be attached to the end of a first front support leg side segment 30a, and a second front wheel 34b may be attached to the end of a second front support leg side segment 30b. Similarly, a first rear wheel 36a may be attached to the end of a first rear support leg side segment 32a, and a second rear wheel 36b may be attached to the end of a second rear support leg side segment 32b. Each of the plurality of wheels 34a, 34b, 36a, 36b may rotate about a horizontally oriented axis to move the stroller frame 20. At least one of the plurality of wheels 34a, 34b, 36a, 36b may also rotate about a vertically oriented axis, allowing the wheel to move in a manner similar to a small caster. In one embodiment, each of the plurality of wheels 34a, 34b, 36a, 36b may rotate about both a horizontal and a vertical axis. However, in other embodiments, not all wheels 34a, 34b, 36a, 36b of the stroller frame 20, for example only the front wheels 34a, 34b or only the rear wheels 36a, 36b, are rotatable about both the horizontal and vertical axes. In some embodiments, as will be described in more detail below, each of the plurality of wheels 34a, 34b, 36a, 36b is rotatable about both the horizontal and vertical axes; however, the rotation of at least one of the wheels 34a, 34b, 36a, 36b (e.g., the rear wheels 36a, 36b) about the respective vertical axis may be selectively restricted, for example, by a locking mechanism.

[0039] One or more of the handle frame 22, front outrigger frame 24, and rear outrigger frame 26 may have corresponding parallel side segments 28a, 28b, 30a, 30b, 32a, 32b interconnected. A handle lateral member 38 may extend between and couple the first handle side segment 28a and the second handle side segment 28b. In the illustrated non-limiting embodiment, the handle lateral member 38 is positioned at the distal ends of the handle side segments 28a and 28b. Furthermore, the handle lateral member 38 may be integrally formed with the handle side segments 28a and 28b, such that the handle frame 22 has a generally U-shaped configuration. A front outrigger lateral member 40 may extend between and connect to the first and second front outrigger side segments 30a and 30b. As shown in FIG. 1, the front outrigger lateral member 40 may be positioned near the distal ends of the first and second front outrigger side segments 30a and 30b. Alternatively or additionally, the rear outrigger lateral member 42 may extend between the first rear outrigger side section 32a and the second rear outrigger side section 32b and couple the first rear outrigger side section to the second rear outrigger side section. The rear outrigger lateral member 42 may be disposed at its distal end. In one embodiment, the front outrigger lateral member 40 and the rear outrigger lateral member 42 are disposed in the same horizontal plane. However, embodiments in which one of the outrigger lateral members 40, 42 is vertically offset from the other are also covered herein. Although the front outrigger lateral member 40 and the rear outrigger lateral member 42 are shown to have a substantially linear configuration and are oriented substantially perpendicular to the opposing outrigger side sections 30a, 30b, 32a, 32b, embodiments in which one or more of the front outrigger lateral member 40 and the rear outrigger lateral member 42 are oriented at another angle relative to one or more outrigger side sections 30a, 30b, 32a, 32b or have another configuration, such as a curved or bent configuration, are also within the scope of this disclosure.

[0040] The first handle side section 28a, the first front outrigger side section 30a, and the first rear outrigger side section 32a can be joined together at the first joint structure 44a. The second handle side section 28b, the second front outrigger side section 30b, and the second rear outrigger side section 32b can be joined together at the second joint structure 44b. The first joint structure 44a and the second joint structure 44b can be similar to or substantially the same as each other.

[0041] The joint structures 44a and 44b combine to allow relative rotation between the handle frame 22, the front support leg frame 24, and the rear support leg frame 26. In one embodiment, each of the handle frame 22, the front support leg frame 24, and the rear support leg frame 26 is rotatable relative to the joint structures 44a and 44b. However, in other embodiments, only some of the handle frame 22, the front support leg frame 24, and the rear support leg frame 26 are rotatable relative to the joint structures 44a and 44b. For example, the rear support leg frame 26 may be fixedly connected to the joint structures 44a and 44b and the handle frame 22, and the front support leg frame 24 may pivot relative to the rear support leg frame 26 at the joint structures 44a and 44b. The joint structures 44a and 44b are coaxially positioned, and in one embodiment, one or more of the plurality of movable frames 22, 24, and 26 of the stroller frame 20 may pivot about a rotation axis X defined by the joint structures 44a and 44b.

[0042] In one embodiment, the handle frame 22 includes an upper portion 46 connected to a lower portion 48. As shown, the lower portion 48 is connected to connector structures 44a, 44b. The upper portion 46 is disposed at opposite ends of the handle frame 22 and movably connected to the lower portion 48 of the handle frame 22. The upper portion 46 of the handle frame 22 may respectively include a handle transverse member 38 and a portion of each of a first handle side segment 28a and a second handle side segment 28b. In the illustrated non-limiting embodiment, the upper portion 46 of the handle frame 22 may be pivotally or hingedly connected to the lower portion 48 of the handle frame 22. The connectors or hinges formed between the upper portion 46 and the lower portion 48 of the handle frame 22, identified at 50a, 50b, allow relative movement between the upper portion 46 and the lower portion 48 of the handle frame 22 about a hinge axis Y in at least one direction.

[0043] The handle frame 22 can be switched between a use position and a storage position. In the use position ( Figure 1A and 1B In the case of the handle frame 22, the upper portion 46 and the lower portion 48 are coplanar. Furthermore, in the use position, the lower portion 48 of the handle frame 22 is coplanar with the front support leg frame 24. In the storage position (… Figure 2 , 9 In 11), the lower portion 48 of the handle frame 22 extending from the joint structures 44a, 44b is not coplanar with the front outrigger frame 24. Instead, the lower portion 48 may be positioned adjacent to the rear outrigger frame 26. In one embodiment, when the handle frame 22 is in the stored position, the lower portion 48 of the handle frame 22 is arranged substantially parallel to the rear outrigger frame 26, for example, within ±10°.

[0044] Furthermore, in the stored position, the upper portion 46 of the handle frame 22 rotates about the hinge axis Y relative to the lower portion 48 of the handle frame 22 at hinges 50a, 50b. In such embodiments, the lower portion 48 and the upper portion 46 of the handle frame 22 can be oriented substantially parallel to each other. As shown, when the handle frame 22 is in the stored position, the lower portion 48 of the handle frame 22 can be positioned between the rear support leg frame 26 and the upper portion 46 of the handle frame 22 when folded. However, embodiments in which the upper portion 46 is arranged between the rear support leg frame 26 and the lower portion 48 of the handle frame 22 are also covered herein.

[0045] The axial length of the upper portion 46 of the handle frame 22 may be less than or equal to the axial length of the lower portion 48. Therefore, in the stored position, the total length of the handle frame 22 is limited between the joint structures 44a, 44b and the joints 50a, 50b, which define the hinge axis Y. The length of the handle frame 22 in the stored position is thus reduced by the length of the upper portion 46. This reduced length of the handle frame 22 reduces the overall size occupied by the stroller frame 20, for example, when the stroller frame 20 is in a folded configuration.

[0046] The stroller frame 20 can be configured to unfold or extend ( Figure 1A and 1B ) with stow or fold configuration ( Figure 2 The stroller frame 20 is configured to receive a child seat thereon (described in more detail below), such that the entire child mobility device 10 can be moved or pushed by applying force to the handle frame 22, for example, to the handle lateral member 38.

[0047] In the expanded configuration, such as Figure 1A and 1B As shown, the front support leg frame 24 is arranged at a non-parallel angle relative to the rear support leg frame 26. As illustrated, when in the unfolded configuration, the angle between the front support leg frame 24 and the rear support leg frame 26 is between approximately 60° and 120°. In one embodiment, when the stroller frame 20 is in the unfolded configuration, the angle formed between the front support leg frame 24 and the rear support leg frame 26 is approximately 90°. However, any suitable angle is within the scope of this disclosure.

[0048] When the stroller frame is in the unfolded configuration, the handle frame 22 is in the use position such that the upper portion 46 and the lower portion 48 of the handle frame 22 are oriented to be generally parallel to and coplanar with the front support leg frame 24. As described herein, when the handle frame 22 is positioned within ±10° of the front support leg frame 24, the handle frame 22 can be considered to be generally parallel to and coplanar with the front support leg frame 24.

[0049] The stroller frame 20 can be converted into a folding configuration to be stored away when not in use. (Reference) Figure 2 In the folding configuration, one or more of the handle frame 22, the front support leg frame 24, and the rear support leg frame 26 rotate relative to the joint structures 44a, 44b to reduce the overall size of the stroller frame 20.

[0050] In the folded configuration, the front support leg frame 24 is positioned adjacent to the rear support leg frame 26, minimizing the gap between the front support leg frame 24 and the rear support leg frame 26 of the stroller frame 20. As shown, the front support leg frame 24 can be positioned directly adjacent to the rear support leg frame 26. Therefore, the angle between the front support leg frame 24 and the rear support leg frame 26 can also be minimized. In one embodiment, when the stroller frame 20 is in the folded configuration, the front support leg frame 24 and the rear support leg frame 26 of the stroller frame 20 are generally parallel to each other, for example, within ±10°. The lateral distance between at least a portion of the first front support leg side segment 30a and the corresponding portion of the second front support leg side segment 30b can be smaller than the lateral distance between the adjacent portion of the first rear support leg side segment 32a and the adjacent portion of the second rear support leg side segment 32b. Therefore, when the stroller frame 20 is in a folded configuration, the front wheels 34a, 34b can be arranged inside the rear support leg side sections 32a, 32b, for example, within the lateral distance defined between the first rear support leg side section 32a and the second rear support leg side section 32b.

[0051] When the stroller frame 20 is in the folded configuration, the handle frame 22 is positioned in the storage location. Therefore, the lower portion 48 of the handle frame 22 is rotated about axis X to a position generally parallel to the rear support leg frame 26, and the upper portion 46 of the handle frame 22 is folded about axis Y to a position generally parallel to the lower portion 48 of the handle frame. The entire handle frame 22 is thus vertically positioned below the joint structures 44a, 44b, or positioned between the joint structures 44a, 44b and the periphery of the wheels 34a, 34b, 36a, 36b. When the stroller frame 20 is in the folded configuration, reducing the length of the handle frame 22 by folding the upper portion 46 reduces the total size occupied by the folded front support leg frame 24, rear support leg frame 26, and handle frame 22.

[0052] When the stroller frame 20 is in a folded configuration, such that the handle frame 22 is folded into a storage position, the handle frame 22 can be used to stabilize the stroller frame 20. For example, the wheels can support the folded stroller frame 20 in a first position, and the joints 50a, 50b formed at the handle frame 22 can be used to support the folded stroller frame 20 in a second position spaced apart from the first position. Therefore, in some embodiments, the stroller frame 20 may be able to stand upright when in a folded configuration (e.g., ...). Figure 2 (As shown in the image).

[0053] To initiate the folding operation that folds the stroller frame 20, the user can apply force to a release actuator 52 mounted around the stroller frame 20. Although the release actuator 52 is shown in a location positioned along the handle frame 22, for example, at the handle transverse member 38, embodiments in which the release actuator 52 is arranged at another location around the stroller frame 20 are also covered herein. The release actuator 52 is operatively coupled to one or more portions 22, 24, 26 of the stroller frame 20 that are pivotable about an axis X of the joint structures 44a, 44b. In one embodiment, the stroller frame 20 includes a lock (not shown) associated with the handle frame 22 and / or the front support leg frame 24. This lock may be arranged at the joint structures 44a, 44b, or alternatively or additionally, at links 60a, 60b, which will be described in more detail below. The release actuator 52 can be used to disengage the lock, thereby allowing the handle frame 22 and / or the front support leg frame 24 to rotate about axis X to fold the stroller frame 20. However, embodiments in which the operation of the release actuator 52 not only disengages the lock but also causes one or more portions 22, 24, 26 of the stroller frame 20 to rotate automatically about axis X toward the folded configuration are also covered herein.

[0054] In response to the operation of the release actuator 52, the lock associated with at least one of the handle frame 22 and the front outrigger frame 24 is unlocked. Therefore, the handle frame 22 and / or the front outrigger frame 24 are allowed to rotate freely about the axis X of the joint structures 44a, 44b. For example, the front outrigger frame 24 rotates about the axis X in a first direction toward the rear outrigger frame 26, for example by applying a force to the front outrigger frame 24 in the direction of the rear outrigger frame 26. Similarly, the handle frame 22 rotates about the axis X in the opposite second direction toward the rear outrigger frame 26, for example by applying a force to the handle frame 22 toward the rear outrigger frame 26. After the lower portion of the handle frame 22 has reached its final rotational position, the upper portion 46 of the handle frame 22 may rotate about the axis Y toward the lower portion 48 of the handle frame 22. Alternatively, when the handle frame 22 pivots about the X-axis of the joint structures 44a, 44b toward the rear support frame 26, the upper portion 46 of the handle frame 22 may rotate relative to the lower portion 48 about the hinge axis Y.

[0055] In one embodiment, the stroller frame 20 includes at least one link configured to drive movement of the front support leg frame 24 relative to the rear support leg frame 26. For example, the at least one link may be used to drive the front support leg frame 24 away from the rear support leg frame 26 when the stroller frame 20 is converted to an unfolded configuration, and / or may be used to drive the front support leg frame 24 toward the rear support leg frame 26 when the stroller frame 20 is converted to a folded configuration. The at least one link may include a first link 60a disposed on a first side of the stroller frame 20 and a second link 60b disposed on a second side of the stroller frame 20.

[0056] In the illustrated non-limiting embodiment, links 60a and 60b respectively include first links 62a and 62b and second links 64a and 64b. The first links 62a and 62b and the second links 64a and 64b of each link 60a and 60b can be shaped into rods, plates, or any other suitable shape. The adjacent ends of the first links 62a and 62b and the second links 64a and 64b of links 60 and 60b can be pivotally connected to each other at link hinges 66a and 66b defining the link axis Z. In one embodiment, the link hinges 66a and 66b, and therefore the link axis Z, are vertically offset from axis X, for example, below axis X, about which at least one of the front outrigger frame 24 and the rear outrigger frame 26 rotates. Furthermore, the link axis Z and the axis X of the joint structures 44a and 44b can be aligned with each other along a vertical axis, or alternatively, the link axis Z can be offset from axis X in a longitudinal direction. For example, the link axis Z may be positioned in front of axis X such that the link axis Z is closer to the front of the stroller frame 20 than the axis X of the joint structures 44a, 44b. In one embodiment, the first links 62a, 62b are pivotally coupled to one of the front outrigger side sections 30a, 30b. However, embodiments in which the first links 62a, 62b are fixedly coupled to one of the front outrigger side sections 30a, 30b are also covered herein. Alternatively or additionally, the second links 64a, 64b may be fixedly coupled to one of the rear outrigger side sections 32a, 32b, or may be pivotally coupled to one of the rear outrigger side sections. In one embodiment, the lock operated by the release actuator 50 is associated with at least one link 60a, 60b, and in some embodiments, is located at the at least one link. For example, the lock may be associated with or located at the link hinges 66a, 66b.

[0057] The child mobility system 10 further includes at least one child seat that can be mounted to the stroller frame 20. Examples of the at least one child seat include, but are not limited to, infant car seats, toddler seats, bassinets, or portable cribs. The at least one child seat is detachably coupled to the stroller frame 20. As shown, a first child seat 100 configured to support a first child and having a first size range (including a first weight range) Figure 3 ), and a second child seat 200 configured to support a second child and having a second size range (including a second weight range). Figures 8A to 9 ) and a third child seat 300 configured to support a third child and having a third size range (including a third weight range) Figure 10 The first child seat 100 is interchangeably connected to the stroller frame 20. In the illustrated non-limiting embodiment, the first child seat 100 is an infant car seat designed for use by infants, such as those weighing between 0 lbs and 35 lbs or between 4 lbs and 35 lbs and typically less than 24 months old. The infant car seat 100 may include a carry handle 101 to allow for easy carrying of the infant car seat when detached from the stroller frame 20. The second child seat 200 may be a first toddler seat or a toddler car seat. This first toddler seat 200 is adjustable relative to the stroller frame 20 when attached. For example, the first toddler seat 200 may rotate between a generally upright position and a generally horizontal position. In one embodiment, the first toddler seat 200 is designed for use by children at least 3 months old and weighing at most approximately 35 lbs, 40 lbs, or 50 lbs. The third child seat 300 may be a second toddler seat. The second child seat 300 is suitable for use by children who have grown beyond the first child seat 200 (e.g., taller and / or heavier children / toddlers). In one embodiment, the second child seat 300 is intended for use by children at least 1 year old and weighing up to 50 lbs. The connection between the child seats 100, 200, 300 and the stroller frame 20 will be described in more detail below.

[0058] Child seats 100, 200, 300, which can be attached to stroller frame 20, can be positioned to contact at least one link 60a, 60b, for example, with support surfaces 68a, 68b of at least one link 60a, 60b. In some embodiments, support surfaces 68a, 68b are configured to support the child seat thereon. (Reference) Figure 4 A first child seat, such as an infant car seat 100, includes a seat housing 102 having two tracks 104a, 104b defined at its bottom. When the infant car seat 100 is attached to a stroller frame 20, as... Figure 4As shown, tracks 104a and 104b can be arranged to directly contact the upward-facing support surfaces 68a and 68b of at least one link 60a and 60b. In embodiments where links 60a and 60b are formed by a combination of first links 62a and 62b and second links 64a and 64b, each of the first links 62a and 62b and the second links 64a and 64b can each define a portion of the support surfaces 68a and 68b. The first links 62a and 62b may include first upper surfaces 70a and 70b, and the second links 64a and 64b include second upper surfaces 72a and 72b. As shown, when the stroller frame 20 is in the unfolded configuration, the first upper surfaces and second upper surfaces 70a, 70b, 72a, 72b of the first and second links 62a, 62b, 64a, 64b of each link 60a, 60b are aligned with each other, and the bottom surface of the child seat coupled to the stroller frame 20 can be stationary or engaged with one or both of the first upper surfaces and second upper surfaces 70a, 70b, 72a, 72b. This engagement prevents the child seat from moving downwards relative to the stroller frame 20.

[0059] refer to Figures 4 to 7B The stroller frame 20 includes at least one seat-connecting hub, hereinafter described as 80a, 80b, 90a, 90b, which can be used to detachably connect or couple at least one child seat 100, 200, 300 to the stroller frame 20, such that the movement of the child seat 100, 200, 300 relative to the stroller frame 20 is restricted in at least one of the vertical, longitudinal, and lateral directions. At least one seat-connecting hub may comprise multiple seat-connecting hubs. For example, at least one seat-connecting hub may include a first pair of seat-connecting hubs 80a, 80b respectively located on a first side and a second side of the stroller frame 20. In the non-limiting embodiments shown, one or more seat-connecting hubs, such as the first pair of seat-connecting hubs 80a, 80b, are positioned generally adjacent to the joint structures 44a, 44b of the stroller frame 20. However, embodiments in which the seat-connecting hubs 80a, 80b are positioned away from the joint structures 44a, 44b are also covered herein.

[0060] The first seat connecting hub 80a of the first pair of seat connecting hubs can be configured to attach to a first lateral side of the child seats 100, 200, 300, and the second connecting hub 80b of the first pair of seat connecting hubs can be configured to couple to a second lateral side of the child seats 100, 200, 300. The first pair of seat connecting hubs 80a, 80b are detachably connected to a rigid portion of the child seats 100, 200, 300, for example, detachably connected to the rigid body or frame 102, 202 of the child seats. Furthermore, the first pair of seat connecting hubs 80a, 80b can be connected to a plurality of different child seats suitable for use with the stroller frame 20, or alternatively, can be suitable for use with only one of the plurality of child seats 100, 200, 300 that can be connected to the stroller frame 20. In the illustrated non-limiting embodiment, the first pair of seat connecting hubs 80a, 80b can be used to couple a first child seat 100, such as an infant car seat, to the stroller frame 20. The first pair of seat connecting hubs 80a and 80b can be used to couple only the first child seat 100 to the stroller frame 20.

[0061] Each of the first pair of seat connecting hubs 80a and 80b has a definable receiving feature 82a and 82b (see [link]). Figure 4 For example, openings or protrusions configured to receive or engage corresponding engagement features 106a, 106b, such as another of the protrusions and openings of child seats 100, 200, 300. In the illustrated non-limiting embodiment, the first pair of seat connecting hubs 80a, 80b includes openings 82a, 82b on their inner surfaces. Openings 82a, 82b are configured to receive corresponding protrusions 106a, 106b extending outward from, for example, the child seat of the first child seat 100. As shown, each seat connecting hub 80a, 80b in the first pair of seat connecting hubs can be used to engage different lateral sides of the first child seat 100 to restrict movement of the first child seat 100 in the lateral direction A. Furthermore, the receiving features 82a, 82b of each of the first pair of seat connecting hubs 80a, 80b are configured to engage the corresponding engagement features 106a, 106b of the first child seat 100 to limit movement of the first child seat 100 along the vertical direction V (e.g., along at least one of the upward and downward directions) and / or the longitudinal direction L. Although the first pair of seat connecting hubs 80a, 80b are shown and described with respect to connection to the infant car seat 100, it should be understood that embodiments of another type of seat as described herein may be connected to the first pair of seat connecting hubs 80a, 80b via, for example, features of 106a, 106b.

[0062] For reference Figures 6 to 9In one embodiment, in addition to the first pair of seat-connecting hubs 80a, 80b, at least one seat-connecting hub of the stroller frame 20 also includes a second pair of seat-connecting hubs 90a, 90b. The first seat-connecting hub 90a of the second pair of seat-connecting hubs may be configured to attach to a first lateral side of the child seat 100, 200, 300, and the second connecting hub 90b of the second pair of seat-connecting hubs may be configured to couple to a second lateral side of the child seat 100, 200, 300. In one embodiment, each of the second pair of seat-connecting hubs 90a, 90b is a snap-fit. As shown, the snap-fit ​​may extend upward beyond the surface of the stroller frame 20. For example, each snap-fit ​​90a, 90b may extend generally in a vertical direction. In the non-limiting embodiment shown, each of the second pair of seat-connecting hubs 90a, 90b is not vertically aligned with the corresponding connector structures 44a, 44b. Conversely, the seat connecting hubs 90a and 90b can be longitudinally offset from the joint structures 44a and 44b. The second pair of seat connecting hubs 90a and 90b can be positioned in front of the joint structures 44a and 44b, for example, closer to the front outrigger frame (see [link]). Figures 6 to 7B Alternatively, it can be positioned behind the joint structure (see...). Figures 8A to 9 In an embodiment where the second pair of seat connecting hubs 90a, 90b are positioned behind the joint structures 44a, 44b, the second pair of seat connecting hubs 90a, 90b may be attached to the handle side sections 28a, 28b of the handle frame 22, for example, at a position vertically aligned with a portion of the rear outrigger frame 26.

[0063] exist Figure 8A and 8B An example of a second child seat 200 is shown in more detail below. As shown, the second child seat 200 may include a seat frame 202, an upper frame 204, and a lower frame 206. The upper frame 204 and the lower frame 206 may be connected to each other at one or more seat mounts. For example, a first side of the upper frame 204 and the lower frame 206 may be connected via a first seat mount 208a, and a second opposite side of the upper frame 204 and the lower frame 206 may be connected via a second seat mount 208b. The upper frame 204 may extend generally upward from at least one seat mount 208a, 208b, and the lower frame 206 may extend generally downward from at least one seat mount 208a, 208b. In one embodiment, at least one of the upper frame 204 and the lower frame 206 is pivotally connected to the seat mount 208a, 208b. The arm 210 may extend between opposite sides of the seat frame 202 and, in some embodiments, is connected to at least one seat mount 208a, 208b. The arm 210 may, but does not need to, be pivotally connected to the seat mount 208a, 208b.

[0064] The second child seat 200 can be configured to be connected to the stroller frame 20 in multiple ways. In one embodiment, the seat frame 202 of the second child seat 200 can be connected to the stroller frame 20 in a first forward-facing mode. Figure 8A Alternatively or additionally, the seat frame 202 of the second child seat 200 can be connected to the stroller frame 20 in a second rear-facing mode. Figure 8B In one embodiment, each of the second pair of seat hub connectors 90a, 90b includes a receiving feature, such as a slot, configured to engage a corresponding engagement feature of the child seat 200 to attach the seat frame 202 of the second child seat 200 to the stroller frame 20. A plurality of seat mounts 208a, 208b may be arranged at the second child seat 200, and each of the seat mounts 208a, 208b is an engagement feature configured to cooperate with the seat hub connectors 90a, 90b to detachably couple the second child seat 200 to the stroller frame 20. For example, the seat mounts 208a, 208b may be protrusions 208a, 208b that can be inserted into corresponding slots formed in the seat hubs 90a, 90. However, this document also covers embodiments in which the seat mounts 208a and 208b are grooves and the seat connecting hubs 90a and 90b include protrusions that can be received within the respective seat mounts 208a and 208b.

[0065] The engagement features of the seat mounts 208a, 208b of the second child seat 200 may have a different size and / or shape than the engagement features 106a, 106b of the first child seat 100. Furthermore, the engagement features of the seat mounts 208a, 208b of the second child seat 200 may extend relative to the stroller frame 20 in a different orientation than the engagement features 106a, 106b of the first child seat 100. Therefore, the engagement features of the second child seat 200 may not be suitable for connection with the first pair of seat hub connectors 80a, 80b. Similarly, the engagement features 106a, 106b of the first child seat may not be suitable for connection with the second pair of seat hub connectors 90a, 90b. Therefore, each child seat 100, 200 that can be connected to the stroller frame 20 may require seat hubs 80a, 80b, 90a, 90b with different configurations.

[0066] like Figure 9 As shown, when, for example, the child seat 200 remains connected to the stroller frame 20, the stroller frame 20 can switch between an unfolded configuration and a folded configuration. Examples of the stroller frame 20 and the second child seat 200 in a folded configuration are shown in [the diagram / illustration]. Figure 9 Display at ( Figure 8A and 8B (Showing stroller frame 20 and second child seat 200 in unfolded configuration). Figure 9 As shown, when the second child seat 200 is attached to the stroller frame 20 via the second pair of seat connecting hubs 90a, 90b, the seat frame 202 of the second child seat 200 is oriented generally parallel to the handle frame 22. In embodiments where each of the second pair of seat connecting hubs 90a, 90b is attached to the lower portion 48 of the handle frame 22, the seat frame 202 will maintain its generally parallel orientation relative to the lower portion of the handle frame 22 as the lower portion 48 of the handle frame 22 rotates about the axis X of the connector structures 44a, 44b.

[0067] exist Figure 10 An example of a third child seat 300 that can be mounted to a stroller frame 20 is shown. A non-limiting embodiment of the third child seat 300 includes a body 302, for example, a body at least partially formed of textiles. For example, the body 302 may include a structural frame (not shown) surrounded by textiles. In other embodiments, a large portion of the body 302 of the third child seat 300 may be formed of a structurally rigid material, such as plastic.

[0068] The body 302 of the third child seat 300 can be connected to the stroller frame 20 via at least one engagement feature (not shown). In some embodiments, at least one engagement feature can be connected to a seat connection hub of the stroller frame 20. In one embodiment, the third child seat 300 can be connected to a first pair of seat connection hubs 80a, 80b. In other embodiments, alternatively or additionally, the third child seat 300 can be connected to the stroller frame 20 via a second pair of seat connection hubs 90a, 90b.

[0069] In yet another embodiment, at least one engagement feature of the third child seat 300 may not be connected to one of the plurality of seat-connecting hubs 80a, 80b, 90a, 90b. Instead, at least one engagement feature may be associated with the stroller frame 20 and may be connected to itself or to another part of the third child seat 300. For example, at least one engagement feature of the third child seat 300 may be a strip configured to wrap around the corresponding handle side sections 28a, 28b or leg side sections 30a, 30b, 32a, 32b of the stroller frame 20 to couple the third child seat 300 to the stroller frame 20. In one embodiment, at least one engagement feature of the third child seat 300 includes a hook, a magnet, a latch, and a loop fastener, or any other suitable fastener that can be used to mechanically couple the third child seat 300 to the stroller frame 20.

[0070] When the third child seat 300 is attached to the stroller frame 20, the stroller frame 20 can switch between an unfolded configuration and a folded configuration. When the third child seat 300 is attached to the stroller frame 20, the third child seat 300 is oriented generally parallel to the handle frame 22. The third child seat 300 will maintain its generally parallel orientation relative to the lower portion of the handle frame 22 as the lower portion of the handle frame 22 rotates about the axis X of the joint structures 44a, 44b. In embodiments where the third child seat 300 is formed by a frame surrounded by textiles, at least a portion of the textiles and / or a portion of the frame may be foldable to allow the third child seat 300 to fold. Similar to the second child seat, this is possible because at least one engagement feature of the third child seat 300 can be configured to maintain the relative orientation between the third child seat and the handle frame 22 when the stroller frame 20 is folded. However, in other embodiments, such as where the body 302 of the third child seat 300 is a rigid structure, the stroller frame 20 may not be foldable when the third child seat 300 is mounted.

[0071] In one embodiment, the stroller frame 20 can also be configured as a third configuration, which is also referred to herein as a luggage configuration. As will be described in more detail below, the third configuration is referred to as a luggage configuration because in the third configuration, multiple wheels 24a, 34b, 36a, 36b can be used as small casters, similar to the small casters used on upright rolling luggage. Reference Figures 11 to 13B The luggage configuration can be considered as a partially folded configuration. Specifically, the luggage configuration occurs when the handle frame 22 is changed to a storage position without adjusting the relative positions of the front support leg frame 24 and the rear support leg frame 26. For example... Figure 11 As shown, in the luggage configuration, similar to the unfolded configuration, the front support leg frames 24 and the rear support leg frames 26 are separated from each other by a gap. However, the handle frame 22 rotates about the axis X of the connector structures 44a, 44b to the storage position, rotating to a position vertically below the seat connecting hubs 80a, 80b. Therefore, when the stroller frame 20 is in the luggage configuration, the operator does not intend to use the handle frame 22 to push the child mobility system 10. Instead, a portion of the child seat attached to the stroller frame 20 can be used to drive the stroller frame 20.

[0072] As previously mentioned, when the handle frame 22 is in the stored position, the lower portion 48 of the handle frame 22 is arranged adjacent to and generally parallel to the rear support leg frame 26. Furthermore, the upper portion 46 of the handle frame 22 rotates about the hinge axis Y at hinges 50a, 50b, such that the upper portion 46 is oriented generally parallel to the lower portion 48 and / or the rear support leg frame 26. Figure 11As shown, when the handle frame 22 is in the stored position, the entire handle frame 22 is positioned within the gap defined between the bottoms of the plurality of wheels 34a, 34b, 36a, 36b and a plane P, which is tangent to and parallel to the plane containing the bottoms of the plurality of wheels 34a, 34b, 36a, 36b. In embodiments where a pair of seat connecting hubs 80a, 80b are positioned at or substantially adjacent to the connecting structures 44a, 44b of the stroller frame 20, the entire handle frame 22 may be vertically positioned below the seat connecting hubs 80a, 80b, for example, between the seat connecting hubs 80a, 80b and the plane containing the bottoms of the plurality of wheels 34a, 34b, 36a, 36b. In this position, the handle frame 22 is retracted without impeding the mobility of the stroller frame 20 or obstructing the connection of at least one child seat of the first child seat 100 to the seat connection hubs 80a, 80b of the stroller frame 20.

[0073] When child seats 100, 200, and 300 are connected to stroller frame 20 and / or when child seats 100, 200, and 300 are not connected to stroller frame 20, stroller frame 20 can be converted into a luggage configuration. Figure 11 In the non-limiting embodiment shown, the stroller frame 20 is depicted in a luggage configuration, wherein a first child seat 100, such as an infant car seat, is attached to the stroller frame. In such embodiments, the handle of the first child seat 100 can be used to move or manipulate the child mobility system 10.

[0074] Continue to refer to Figure 11 And further reference Figures 12A to 13B The operating mode of at least one wheel 34a, 34b, 36a, 36b of the stroller frame 20 can vary depending on the configuration of the stroller frame 20. For example, when the stroller frame 20 is in an unfolded configuration, at least one wheel 34a, 34b, 36a, 36b of the stroller frame 20 can rotate only about a first axis, and when the stroller frame 20 is in a luggage configuration, and in some embodiments, in a folded configuration, at least one wheel 34a, 34b, 36a, 36b of the stroller frame 20 can rotate about both the first axis and a second axis. In the illustrated non-limiting embodiment, the wheels 34a, 34b attached to the front support leg frame 24 are configured as casters, and each wheel can rotate about a horizontal axis and a corresponding vertical axis, regardless of the configuration of the stroller frame 20. However, each of the rear wheels 36a, 36b connected to the rear support leg frame 26 can rotate only about the horizontal axis when the stroller frame 20 is in the unfolded configuration, and can also rotate about the corresponding vertical axis when the stroller frame 20 is in the luggage configuration.

[0075] Figure 12A and 12B An example of a wheel rotation lock 400 or mechanism for selectively locking, for example, at least one wheel of wheels 36a and 36b, for example, about a respective vertical axis of rotation is shown. The wheel rotation lock 400 is switchable between a locked position and an unlocked position, in which at least one wheel is prevented from rotating about a vertical axis, and in the unlocked position, at least one wheel is allowed to rotate freely about a vertical axis. As shown, a groove 402 may be formed at the end of at least one wheel 36b adjacent to the rear support leg frame 26, and a corresponding pin 404 extending from said end of the rear support leg frame 26 may be received within the groove 402. When the pin 404 is arranged within the groove 402 and thus engages with at least one wheel 36b, at least one wheel cannot rotate about its vertical axis, which is located at... Figures 12A to 13B The middle section shows it at point V.

[0076] The handle frame 22, such as its lower portion, can be operated as an actuator to move the pin 404 and disengage it from the slot 402. In the illustrated non-limiting embodiment, a tension member 406, such as a cable, is operably coupled to the pin 404 and to a portion of the handle frame 22. As the handle frame 22 rotates about the axis X of the joint structures 44a, 44b, the handle frame 22 applies tension to the tension member 406. This increased tension causes the pin 404 to translate upward and disengage from the slot 402 of at least one wheel 36b. The pin 404 will remain in this position, allowing at least one wheel 36b to rotate about its vertical axis V until the handle frame 22 rotates back to a use or operating position substantially aligned with the front outrigger frame 24. Although the wheel swivel lock 400 is shown and described herein with reference to the exemplary rear wheel 36b, it should be understood that any of the stroller wheels 34a, 34b, 36a, 36b may include this locking mechanism 400. Furthermore, the wheel swivel lock 400 shown and described herein is intended only as an example, and any other suitable mechanism that can be used to selectively unlock the rotation of at least one wheel of the stroller frame 20 when the handle frame 22 is in the stored position is also covered herein.

[0077] The child mobility system 10, as described herein, is suitable for use by children when transitioning between multiple child seats. Furthermore, the stroller frame 20 of the child mobility device offers a reduced size, thereby improving portability.

[0078] The term “about” is intended to encompass the degree of error associated with a measurement of a particular quantity based on equipment available at the time of filing this application. As used herein, the term “substantially” and its derivatives and similar terms, when used to describe size, shape, orientation, distance, spatial relationship or other parameters, include the stated size, shape, orientation, distance, spatial relationship or other parameters, and may also include a range of up to 10% higher and down to 10% lower than the stated parameters, including 5% higher and 5% lower, including 3% higher and 3% lower, including 1% higher and 1% lower.

[0079] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. As used herein, the singular forms “a / an” and “described” are intended to also include the plural forms unless the context clearly indicates otherwise. It should be further understood that the terms “comprises and / or comprising”, when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0080] While this disclosure has been described with reference to one or more exemplary embodiments, those skilled in the art will understand that various changes may be made and equivalents may be substituted for elements thereunder without departing from the scope of this disclosure. Furthermore, many modifications may be made to adapt particular situations or materials to the teachings of this disclosure without departing from the basic scope of this disclosure. Therefore, this disclosure is not intended to be limited to the specific embodiments disclosed as the best mode contemplated for carrying out this disclosure, but will encompass all embodiments falling within the scope of the claims.

Claims

1. A travel system comprising: A stroller frame having at least one seat-connecting hub, at least one wheel, and a handle frame that is movable between a use position and a storage position; An infant car seat, detachably connected to the at least one seat-connecting hub; and When the handle frame is in the storage position, the handle frame is positioned between the at least one seat connecting hub and the at least one wheel.

2. The mobility system of claim 1, wherein the handle frame comprises an upper portion and a lower portion, the upper portion being pivotally coupled to the lower portion about a hinge axis.

3. The travel system of claim 2, wherein when the handle frame is in the use position, the upper portion and the lower portion are coplanar, and when the handle frame is in the storage position, the upper portion is folded relative to the lower portion about the hinge axis.

4. The travel system according to claim 2, wherein in the storage location, the upper portion is parallel to the lower portion.

5. The mobility system of claim 1, wherein the stroller frame is configurable between an unfolded configuration and a folded configuration, and the handle is in the storage position in both the unfolded and folded configurations.

6. The mobility system of claim 5, wherein when the stroller frame is in the unfolded configuration, the handle frame is in the use position, and when the stroller frame is in the folded configuration, the handle frame is in the storage position.

7. The mobility system of claim 5, wherein the stroller frame is upright when in the folded configuration.

8. The mobility system of claim 5, further comprising a front support leg frame pivotally coupled to the rear support leg frame, wherein the front support leg frame is spaced apart from the rear support leg frame when the stroller frame is in the unfolded configuration, and the front support leg frame is adjacent to the rear support leg frame when the stroller frame is in the folded configuration.

9. The travel system of claim 8, wherein the stroller frame can be further converted into a luggage configuration, and when the stroller frame is in the luggage configuration, the handle frame is in the storage position.

10. The travel system of claim 9, wherein when the stroller frame is in the luggage configuration, the front support leg frame is spaced apart from the rear support leg frame.

11. The mobility system of claim 1, wherein the stroller frame further comprises a wheel swivel lock, the wheel swivel lock being switchable between a locked position and an unlocked position, wherein in the locked position the at least one wheel is prevented from rotating about a vertical axis, and in the unlocked position the at least one wheel is allowed to rotate freely about the vertical axis.

12. The travel system of claim 11, wherein the stroller frame is switchable between an unfolded configuration and a luggage configuration, and the wheel swivel lock is in the locked position when the stroller frame is in the unfolded configuration, and the wheel swivel lock is in the unlocked position when the stroller frame is in the luggage configuration.

13. The mobility system of claim 12, further comprising an actuator operatively coupled to the wheel turn lock to cause the wheel turn lock to shift between the locked position and the unlocked position, wherein the handle frame is the actuator.

14. The mobility system of claim 13, wherein rotation of the handle frame is capable of causing the wheel rotation lock to change between the locked position and the unlocked position.

15. A travel system comprising: stroller frame, A first child seat, detachably connected to the stroller frame, is configured to support a first child having a first size range; A second child seat, detachably connected to the stroller frame, is configured to support a second child of a second size range; A third child seat, detachably connected to the stroller frame, is configured to support a third child of a third size range; and The first size range, the second size range, and the third size range are different from each other.

16. The mobility system of claim 15, wherein the first child seat is an infant car seat.

17. The mobility system according to claim 15, wherein the second child seat is a toddler car seat.

18. The mobility system of claim 15, wherein the second child seat is connectable to the stroller frame in both forward-facing and rearward-facing modes.

19. The mobility system of claim 15, wherein the stroller frame is foldable when the second child seat is attached to the stroller frame.

20. The travel system according to claim 17, wherein the third child seat is a toddler seat, and the third size range is larger than the second size range.

21. The mobility system of claim 15, wherein the stroller frame further includes at least one seat-connecting hub detachably connected to at least one of the first child seat, the second child seat, and the third child seat.

22. The mobility system of claim 21, wherein the at least one seat connecting hub is configured to be detachably coupled to a rigid portion of at least one of the first child seat, the second child seat, and the third child seat.

23. The mobility system of claim 21, wherein the at least one seat-connecting wheel hub comprises a first pair of seat-connecting wheel hubs positioned around the stroller frame.

24. The mobility system of claim 23, wherein the first pair of seat connecting hubs are detachably connected to the first child seat only.

25. The mobility system of claim 23, wherein the stroller frame further includes a second pair of seat-connecting hubs, the second pair of seat-connecting hubs being detachably connected to at least one of the first child seat, the second child seat, and the third child seat.

26. The mobility system of claim 25, wherein the second pair of seat connecting hubs is longitudinally offset from the first pair of seat connecting hubs.

27. The travel system according to claim 25, wherein the second pair of seat connecting hubs is a bayonet.

28. The mobility system of claim 21, wherein the at least one seat connecting hub includes a receiving feature, and at least one of the first child seat, the second child seat, and the third child seat includes an engagement feature, the engagement feature being received within the receiving feature to detachably couple at least one of the first child seat, the second child seat, and the third child seat to the stroller frame.

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