A chassis for detachably connecting a seating element for a child thereto, a stroller system, and a method of installing a stroller system in and removing a stroller system from a vehicle

The chassis addresses compatibility and storage issues in travel systems by converting between stroller and vehicle configurations, enabling versatile use of different seating elements with secure anchoring, thus enhancing ease of use and space efficiency.

WO2025261779A1PCT designated stage Publication Date: 2025-12-26HTS HANS TORGERSEN & SOENN AS
View PDF 8 Cites 0 Cited by

Patent Information

Application Number
PCT/EP2025/065486
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-06-19
Filing Date
2025-06-04
Publication Date
2025-12-26

AI Technical Summary

Technical Problem

Existing travel systems for infants face compatibility issues between stroller chassis and car safety seats, requiring specific considerations and limited storage space during car travel, and lack versatility in accommodating different types of seating elements.

Method used

A chassis that converts between stroller and vehicle mounting configurations, allowing for detachable connection of various seating elements, including car safety seats and buggy seats, with retractable wheels and a handlebar for strolling, and secure vehicle anchoring using seat belts.

Benefits of technology

Facilitates easy transfer between car travel and strolling, minimizes storage space, and accommodates multiple seating types, ensuring compatibility and versatility without the need to dismount seats during transitions.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure EP2025065486_26122025_PF_FP_ABST
    Figure EP2025065486_26122025_PF_FP_ABST
Patent Text Reader

Abstract

The invention relates to a chassis (100) for detachably connecting a seating element (200, 210) for a child thereto, comprising a base (110) supported by a frame (120) with wheels (135, 145), wherein the chassis (100) is configured for converting between at least a stroller configuration (SC) and a vehicle mounting configuration (VC), wherein in the stroller configuration (SC), the wheels (135, 145) are located below the base (110) with the frame (120) in an extended configuration, wherein in the vehicle mounting configuration (VC), the wheels (135, 145) are retracted with the frame (120) in a collapsed configuration, wherein the base (110) is configured for detachably connecting a seating element (200, 210) for a child thereto in both of the stroller configuration (SC) and the vehicle mounting configuration (VC), wherein the chassis (100) is configured for being installed in a vehicle seat (500) when in the vehicle mounting configuration (VC), and wherein the chassis (100) comprises a handlebar (410) for pushing the chassis (100) when in the stroller configuration (SC).
Need to check novelty before this filing date? Find Prior Art

Description

[0001] A CHASSIS FOR DETACHABLY CONNECTING A SEATING ELEMENT FOR A CHILD THERETO, A STROLLER SYSTEM, AND A METHOD OF INSTALLING A STROLLER SYSTEM IN AND REMOVING A STROLLER SYSTEM FROM A VEHICLE

[0002] FIELD OF THE INVENTION

[0003] The present invention generally relates to a travel system for a child for car travel, and more particularly, to a chassis for a stroller wherein a seating element can be detachably connected to the chassis, and wherein the chassis can be converted between a stroller configuration and a vehicle mounting configuration . The invention also relates to a stroller system comprising a chassis and a seating element and to methods of installing and removing the stroller system in or from a vehicle.

[0004] BACKGROUND

[0005] In order to simplify the transportation of infants by car and the transition between car travel and strolling, a travel system can be used. The travel system typically includes a stroller chassis, an infant car safety seat, and a car safety seat base for secure installation in the seat of a vehicle. The car safety seat, the base and the stroller of a travel system are designed to enable the car safety seat to be easily fastened to and removed from both the car safety seat base and the stroller chassis. Thus, the car safety seat can be easily moved from the car safety seat base installed in the vehicle to the stroller chassis when transitioning between car travel and strolling. To ensure a secure attachment within the vehicle, the car safety seat base typically includes Isofix connectors designed to connect with Isofix anchor points in the vehicle. Alternatively, the base, or an infant car seat, if used without a base, may feature seat belt retaining means, such as designated slots or guides where the seat belt of the vehicle can be threaded and that securely hold and fasten the seat belt.

[0006] Not all car safety seats are compatible with every stroller chassis. The compatibility issues often necessitate specific considerations when selecting a travel system. This can mean that consumers may be limited to purchasing a particular stroller to accommodate their chosen infant car safety seat, or conversely, they may need to select a specific car safety seat based on the stroller they prefer. Some manufacturers offer separate adapters to enable an originally incompatible car safety seat to be mounted to a stroller.

[0007] When transitioning from strolling to car travel, the car safety seat needs to be dismounted from the stroller chassis before it can be installed in the car and the stroller chassis must be stored e.g. in the trunk of the car. The dimensions and design of the stroller, car safety seat, car safety seat base, and possibly associated adapters influence the overall footprint and storage requirements of the travel system, particularly within the confined spaces of vehicles. It is thus desirable that the components of the travel system require as little space as possible, especially considering the limited space during car travel.

[0008] US2022388561A1 discloses a system for converting an infant child seat to a stroller. The system may include an infant child seat, a wheeled frame, and a handle coupled to the infant child seat. The frame is configured to removably receive an infant child seat and includes a plurality of wheels. The wheeled frame does not define a handle.

[0009] In the prior art, there is disclosed infant car safety seats provided with a rollable frame, and that can be installed in a vehicle with the frame, such as in EP2505454A2 or US2014151969A1, see below description. These infant car seats comprise a carrying handle that is used as a handle for strolling.

[0010] EP2505454A2 discloses a baby safety car seat convertible into a rollable baby seat, and comprising a front, head area and a rear, feet area, the head area being higher than the feet area; a right and left pair of front and rear legs, and a handle. Both legs are rotatable relative to each other and to the seat between a storage position to be taken in a safety car seat mode of the seat, and an operational position to be taken in a rolling-carrier mode of the seat. The seat can further have a handle rotatable about a horizontal handle rotation axis between a storage position, in which the handle's distal end is disposed adjacent the head area of the seat and at least a carrying position, in which the handle has an orientation transverse to its rotation axis.

[0011] US2014151969A1 discloses an infant car seat assembly for providing mobility to an infant car seat including at least two hubs, a pair of front legs and a pair of rear legs secured to the hubs at uppermost extents thereof and having at least two wheel assemblies secured to lowermost extents thereof, and at least two adapters configured to releasably secure the hubs to the infant car seat.

[0012] SUMMARY OF THE INVENTION

[0013] An object according to the present invention is to remedy at least one of the abovementioned disadvantages or problems.

[0014] Thus, an object according to the present invention is to minimize the storage space required during car travel with an infant or a young child. It is also an object to facilitate easy transfer between car travel and strolling. It is also an object to remedy disadvantages related to incompatibility between a stroller chassis and car safety seats.

[0015] Furthermore, it is an object to enable a travel system, i.e. a system that allows for safe car travel of an infant or a young child and for strolling, that minimizes the space occupied in the vehicle during car travel.

[0016] It is also an object to enable a travel system that is versatile and / or that is flexible.

[0017] The term car safety seat, when used herein as a type of seating element for the child, may also be referred to as a child safety seat.

[0018] The terms “forward-facing” and “rear-facing”, when used herein to describe directions or positions of the seating element, refers to the view of the child when seated in the seating element relative to the direction of movement of the seat, i.e. if the child is seated in a rear-facing car safety seat when the vehicle is driving forwards, the child will be facing the direction that the vehicle is moving away from.

[0019] When referring to the “front” or the “rear” of the chassis throughout this application, it is referred to the front and rear part of the chassis as it is used when in the stroller configuration, i.e. the front is the most forward portion of the chassis when strolling.

[0020] The present invention is set forth and characterized in the independent claims, while the dependent claims describe other characteristics of the invention.

[0021] With the abovementioned challenges in mind, the present invention brings forward a chassis for detachably connecting a seating element for a child thereto that can be installed in a vehicle with an infant car seat and that can be used for strolling with various different types of seating elements attached. The chassis thus enables a travel system comprising the chassis and a seating element, that requires little storage space in the vehicle as the car safety seat can be mounted in the vehicle seat with the chassis, and that is versatile, as various different types of seating elements can be attached for strolling.

[0022] Accordingly, in a first aspect the present invention relates to a chassis for detachably connecting a seating element for a child thereto. The chassis comprises a base supported by a frame with wheels and the chassis is configured for converting between at least a stroller configuration and a vehicle mounting configuration . In the stroller configuration, the wheels are located below the base with the frame in an extended configuration. In the vehicle mounting configuration, the wheels are retracted with the frame in a collapsed configuration. The base is configured for detachably connecting a seating element for a child thereto in both of the stroller configuration and the vehicle mounting configuration. The chassis is configured for being installed in a vehicle seat when in the vehicle mounting configuration . The chassis comprises a handlebar for pushing the chassis when in the stroller configuration.

[0023] Thus, the chassis can be used as a stroller and may be installed in the vehicle with a car safety seat mounted on it. There is no need to dismount the car safety seat from the chassis before car travel, and the chassis does not take up the limited storage space of the vehicle. When used as a stroller, the car seat can still be attached, or other types of seating elements can be attached, such as a buggy seat.

[0024] When a seating element comprising seat belt receiving means is attached to the base of the chassis and the chassis is in the vehicle mounting configuration, the chassis with the seating element may be securely anchored to the vehicle using the seat belts of the vehicle. This fastening method, i.e. using the vehicle’s seat belts through slots or guides on the car safety seat, is a well-known anchoring method for anchoring car safety seats for children to the vehicle.

[0025] The chassis may comprise a support portion configured for supporting against a seating portion of a vehicle seat, i.e. the seat cushion, when the chassis is in the vehicle mounting configuration. The support portion may comprise a lower support surface of the chassis when the chassis is in the vehicle mounting configuration. The support portion may comprise a lowermost surface of the base and may also comprise a portion of a lowermost surface of the frame, when the chassis is in the vehicle mounting configuration. Said portion of the lowermost surface of the frame in the vehicle mounting configuration may e.g. be a portion of the rear legs of the frame. The lower support surface defines an imaginary base plane of the chassis when the chassis is in the vehicle mounting configuration.

[0026] When the chassis is in the vehicle mounting configuration with the wheels retracted, the wheels are positioned such that they do not obstruct or interfere the placement of the lower support surface of the chassis against the seating portion of the vehicle seat. Thus, the wheels are spatially arranged relative to the lower support surface so as to prevent obstruction of the lower support surface against the seating portion of the vehicle seat. For example, the wheels may be placed above the imaginary base plane defined by the lower support surface, and / or they may be placed in front of the support portion of the chassis at a distance sufficient to avoid interference or contact with the vehicle seat. In front of here means a position more towards the front of the chassis as compared to the support portion, when the chassis is in the vehicle mounting configuration.

[0027] The handlebar of the chassis is suitable for pushing the chassis when in the stroller configuration and may thus be referred to as a stroller handle. Because the chassis comprises such a handlebar, the chassis may be pushed when in the stroller configuration with or without a seating element attached. The chassis does not need to rely on the seating element to have a carrying handle to be used as the push handle during strolling. Therefore, the present chassis is more versatile compared to the prior art in that various types of seating elements, also those not comprising a carrying handle, can be attached to the chassis for strolling. It is typically only infant car seats that are provided with a carrying handle and these handlebars are short and non-extendable, thus not suitable to comfortably be used as a stroller handle. Toddler seats are typically not provided with a handle, and buggy seats are only provided with a handlebar placed in the hip area of the child, for use by the child, and are thus not suitable as a stroller handle.

[0028] The handlebar of the chassis may be part of a handlebar frame. The handlebar frame may be extendable and retractable to allow the position of the handlebar to be moved relative to the frame of the chassis. The handlebar frame may be pivotable relative to the frame of the chassis so as to allow various positions of the handlebar relative to the frame of the chassis, and possibly also allow various configurations of the chassis, such as e.g. a storage configuration.

[0029] The handlebar frame may comprise two side bars extending from opposite sides of the chassis and a lateral handlebar extending between the side bars. The two side bars may be pivotally connected to the frame of the chassis.

[0030] The base may comprise a body that extends laterally across the chassis, i.e. from left to right side of the chassis. Thus, the base 110 may contribute to added stiffness of the chassis 100. This base body may provide a top surface of the base which enables provision of centrally located connection features to the seating element, as opposed to using lateral side connection points, e.g. in the area of the left and right stroller legs.

[0031] The base of the chassis may comprise front and rear mating features for connection to complementary front and rear mating features of the seating element. Traditional car seat bases used for installing the car seat in a vehicle seat often comprise front and rear mating features for safe and secure installation of the car seat in the vehicle, while typically, when installing an infant car seat on a stroller, only two laterally aligned side connection points are used (i.e. not spaced in the front-to-rear direction). Thus, traditionally, the connection features to the car seat base are typically not the same connection features as used for connection to a stroller chassis. This therefore excludes installation of a toddler seat on traditional strollers, as toddler seats typically do not have side connection points for attaching to a stroller. Thus, because of the front and rear mating features on the base of the chassis of the present disclosure, both infant and toddler car seats can be attached to the stroller chassis using complementary front and rear mating features. The front and rear mating features for connection to complementary front and rear mating features of the seating element may be provided by an intermediate connecting element attachable to the base (which is described in further detail below).

[0032] The seating element may be a first seating element or a second seating element. The first seating element and the second seating element may in principle be equal except for their respective connection interface to the base, which will be further explained below. It is to be understood that references to a 'first seating element' and a 'second seating element' are intended to distinguish between types or variants of seating elements, and do not imply the concurrent use of multiple seating elements. Thus, the system is designed to accommodate only one seating element at a time, even though it can support different types (first or second) of seating elements.

[0033] The base may comprise a first connection interface for detachably connecting a first seating element or an intermediate connecting element thereto. The first seating element may also be referred to as a seating element of a first type.

[0034] The first seating element and the intermediate connecting element may be provided with a second connection interface. Thus, the first connection interface is complementary to the second connection interface of the first seating element or of the intermediate connecting element.

[0035] The first connection interface may comprise a first set of mating features. The first set of mating features may comprise front and rear mating features. The second connection interface of the first seating element or of the intermediate connecting element may comprise a second set of mating features. The second set of mating features may comprise front and rear mating features. The first set of mating features may be configured to engage with the second set of mating features of the first seating element or the intermediate connecting element for secure attachment.

[0036] The first seating element may for example be a car safety seat for a child or a buggy seat. The first seating element can also be referred to as a first type of seating element and may thus include various seating elements, such as an infant car safety seat, a toddler car safety seat, a buggy seat, or a bassinet, all of which are provided with a second connection interface for connecting to the first connection interface of the base.

[0037] The base may comprise an intermediate connecting element attachable to the base, wherein the intermediate connecting element may comprise a second connection interface configured for detachably connecting to the first connection interface of the base and wherein the intermediate connecting element may comprise a third connection interface for detachably connecting a second seating element thereto. The second seating element may also be referred to as a seating element of a second type.

[0038] The second seating element may be provided with a fourth connection interface. Thus, the third connection interface of the intermediate connecting element is complementary to the fourth connection interface of the second seating element.

[0039] The intermediate connecting element may be referred to as an adapter. The third connection interface of the intermediate connecting element may comprise a third set of mating features. The third set of mating features may comprise front and rear mating features. The second seating element may comprise a fourth set of mating features configured to engage with the third set of mating features of the intermediate connecting element for secure attachment. The fourth set of mating features may comprise front and rear mating features.

[0040] The second seating element may for example be a car safety seat for a child or a buggy seat. The second seating element can also be referred to as a second type of seating element and may thus include various seating elements, such as an infant car safety seat, a toddler car safety seat, a buggy seat, or a bassinet, all of which are provided with a fourth connection interface for connecting to the third connection interface of the intermediate connecting element.

[0041] The first seating element and the second seating element may in principle be equal seating elements except for their connection interface. The first seating element can, due to its connection interface, be connected directly onto the base of the stroller chassis, while the second seating element can, due to its connection interface, be connected to the base of the stroller chassis using the intermediate connecting element. For example, a first seating element may be an infant car safety seat from a first manufacturer provided with a connection interface that is configured to engage the first connection interface of the base. A second seating element may for example be a similar infant car safety seat from a different manufacturer provided with a different connection interface which can only be connected to the base of the chassis using an intermediate connecting element. Thus, the stroller chassis can be used for many different seating elements including car safety seats and buggy seats and from various manufacturers.

[0042] Due to the intermediate connecting element, the base is configured for selectively attaching different first seating elements, e.g. an infant car seat, a toddler seat, or a buggy seat, or different second seating elements, e.g. an infant car seat, a toddler seat, or a buggy seat. The second seating element is attached using the intermediate connecting element. This allows for a highly versatile system where the parents can use the same chassis for various seating elements, e.g. for both an infant and a toddler, and for use during car travel and strolling. The base may be configured to allow the seating element to be connected to the base in two opposite directions.

[0043] The two opposite directions may include a forward-facing direction and a rearfacing direction for the child.

[0044] Thus, the base may be configured to allow the seating element to be connected to the base forward-facing or rearward-facing.

[0045] The first connection interface may be configured to allow the first seating element or the intermediate connecting element to be connected to the base in two opposite directions. Thus, the seating element may be connected to the base forward -facing or rearward-facing and the intermediate connecting element may be connected to the base forwardly or rearwardly.

[0046] Thus, the second connection interface of the first seating element or of the intermediate connecting element can be coupled to the first connection interface in two opposite directions. The first seating element can thus be mounted to the chassis in a forward-facing and in a rearward-facing direction. When the base comprises and intermediate connecting element, the intermediate connecting element can be installed on the base in a first direction for mounting the second seating element forward-facing, or the intermediate connecting element can be installed in a second direction for mounting the second seating element rearward - facing.

[0047] In some embodiments, the third connection interface is configured to allow the second seating element to be connected to the intermediate connecting element in two opposite directions, i.e. forward- or rearward-facing when in use. Thus, the fourth connection interface of the second seating element can be coupled to the third connection interface in two opposite directions. When the intermediate connecting element is installed on the base, the second seating element then can be mounted to the chassis in a forward-facing and in a rearward-facing direction.

[0048] The frame may comprise a front support provided with one or more front wheels, and a rear support provided with one or more rear wheels.

[0049] The front support and the rear support may be configured for folding in the same direction when the frame is converted from the extended to the collapsed configuration. This direction may be forwards, i.e. such that the wheels are located towards the front of the chassis in the collapsed configuration. The folding may thus be a pivoting forwards and upwards to the collapsed configuration.

[0050] The base comprises a front end and an opposite, rear end. The rear end is the end that is placed towards the back rest of the vehicle seat when the chassis is installed in a vehicle seat. The rear end of the base is also positioned towards the rear of the chassis while the front end is positioned towards the front of the chassis.

[0051] The front wheels are arranged near a front end of the base, e.g. forwards of, but lower than the base, when the frame is in extended configuration. The rear wheels are arranged near a rear end of the base, e.g. rearwards of, but lower than the base, when the frame is in extended configuration.

[0052] The front support and the rear support are preferably folded towards the front end of the base in the collapsed configuration, i.e. when a car safety seat is mounted on the base in a vehicle in a rear-facing position, the front support and the rear support are folded towards the head end of the car safety seat. The front and rear wheels will then also be located at or near the head end of the car safety seat.

[0053] The front support may be pivotally connected to a rear portion of the base and the rear support may be pivotally connected to a front portion of the base, such that when the frame is in the extended configuration, the front support and the rear support cross each other.

[0054] This configuration of the front and rear support allows for a stable stroller configuration while still enabling a compact folding of the frame when collapsed wherein the wheels of both the front and rear support are arranged at the same side and out of the way for the placement of the chassis on the vehicle seat.

[0055] The front support and the rear support may be coupled by a folding mechanism, the folding mechanism being configured to fold the front support and the rear support in conjunction from extended to collapsed configuration of the frame.

[0056] Thus, the front support and the rear support can easily be folded in one movement, e.g. by manipulating only the rear support.

[0057] The folding mechanism may be a four-bar folding mechanism. The four-bar folding mechanism comprises a couple bar pivotally connected to the front support and the rear support. The four bars of the four-bar folding mechanism include a section of the front support, a section of the rear support, the base, and the couple bar. The couple bar may be arranged such that its connection points to the front support and the rear support is at a location below the location where the front and rear legs cross when extended.

[0058] The front support may comprise one or more front legs, each of the front legs being provided with a front wheel. The rear support may comprise one or more rear legs, each of the rear legs being provided with a rear wheel.

[0059] The legs may be pivotally connected to the base. The front support and / or the rear support may comprise two legs. The rear legs may be laterally offset relative to the front legs, thereby preventing interference or collision of the front and rear legs when collapsing or extending the frame.

[0060] The legs may be locked by a locking mechanism in the stroller configuration. The legs may be locked by a locking mechanism in the vehicle mounting configuration, which locking mechanism may be the same locking mechanism as for the stroller configuration.

[0061] The rear wheels may be laterally offset relative to the front wheels.

[0062] Because of this lateral offset, the rear wheels can be placed laterally aligned with the front wheels when the frame is in the collapsed configuration, thereby obtaining a more compact chassis. The lateral offset ensures that the rear wheels do not interfere with the front wheels when the frame is collapsed.

[0063] Laterally aligned means that the wheels of the rear support can be placed sideways adjacent to the wheels of the front support. For example, if the frame comprises two front legs, each front leg provided with a wheel, and two rear legs, each rear leg provided with a wheel; the four wheels align laterally when the frame is in the collapsed configuration.

[0064] The handlebar may be arranged such that when the chassis is in the vehicle mounting configuration and when in use in a vehicle seat, the handlebar may be supported against a back rest of the vehicle seat.

[0065] The handlebar thus provides additional stability of the car seat and the chassis when placed in a vehicle seat.

[0066] The chassis may comprise a handlebar frame comprising the handlebar. At least part of the handlebar frame may also be supported against the back rest of the vehicle seat.

[0067] The chassis may be configured for converting to a storage configuration when no car safety seat is attached to the chassis. The storage configuration is more compact than the vehicle mounting configuration and is a space -saving functionality for when the chassis is not in use or is being transported e.g. in the trunk of a car. In the storage configuration, the frame is collapsed, as in the vehicle mounting configuration, and the handlebar frame is folded against the legs.

[0068] The invention also relates to a stroller system, wherein the stroller system comprises a chassis according to any of the preceding paragraphs and a seating element.

[0069] The seating element may be a first seating element comprising a second connection interface or a second seating element comprising a fourth connection interface. The stroller system may comprise more seating elements, e.g. one or more first seating elements and / or one or more second seating elements. When the stroller system comprises a second seating element, it also comprises an intermediate connecting element.

[0070] For example, the system may comprise a chassis with an intermediate connecting element, an infant car safety seat with a fourth connection interface for connecting to the intermediate connecting element on the chassis, and a buggy seat with a second connection interface for connecting directly to the first connection interface of the base. Thus, if the system is to be used for strolling with the buggy seat, the intermediate connecting element can be removed and the buggy seat mounted to the base of the chassis, typically forward-facing. If the system is to be used for strolling with the infant car safety seat, the chassis needs only to be taken out of the vehicle and converted to stroller configuration by expanding the frame while the infant car safety seat can remain attached. If it is desired to change from rear-facing to forward-facing position of the car safety seat on the chassis, the intermediate connecting element can be detached and re-installed in the opposite direction on the base of the chassis.

[0071] Because the intermediate connecting element can be made with various mating features on the third connection interface, the chassis can in principle be used for most detachable seating elements. This is typically useful where a car seat of one manufacturer has a connection interface to the base which is different from that of another manufacturer. The possibility to insert an intermediate connecting element adapted to the various connection interfaces of different car seats on the market provides a major advantage and versatility for the user.

[0072] When the system comprises a seating element being a buggy seat, the buggy seat and the chassis may be designed to enable the chassis to be converted to the storage configuration with the buggy seat attached, e.g. when the buggy seat is mounted forward-facing.

[0073] The seating element of the stroller system may comprise seat belt receiving and retaining means for securing the seating element with the chassis in a vehicle seat.

[0074] The seat belt receiving and retaining means may be guiding elements, such as pathways or slots, through which the vehicle’s seat belt can be threaded to secure the seating element with the chassis in a seat of a vehicle.

[0075] The seating element of the stroller system may e.g. be an infant car seat which may be provided with seat belt receiving and retaining means and a carrying handle.

[0076] The handlebar may be arranged such that, when the chassis is in the vehicle mounting configuration and when the chassis with the seating element is secured in a vehicle seat, the handlebar is supported against a back rest of the vehicle seat, and the handlebar is configured for preventing rearwards rotation of the chassis with the seating element in the event of a sudden change of velocity of the vehicle.

[0077] The handlebar frame thus serves as an anti-rotation device for improved safety in the event of a rapid deceleration such as a collision or sudden stop.

[0078] The handlebar may extend transversally, e.g. from side-to-side of the chassis, and may be positioned at an elevated position compared to the car seat.

[0079] Rearwards rotation here refers to the tendency of the seating element to rotate around a pivot point towards the rear of the vehicle upon impact. By having the handlebar supported against the back rest of the vehicle seat, the pivot point can be elevated compared to a stroller system without such handlebar, and thereby prevent rotation.

[0080] There are various ways in which the handlebar frame may be configured for preventing rotation of the chassis with the seating element. The handlebar frame may be arranged with a fixed angle relative to the base, e.g. by a locking mechanism locking the handlebar frame in one angle. The handlebar frame may be configured to physically restrict the rear portion of the car safety seat from rotating by having the transverse extension of the seat larger than the transverse gap between the side bars of the handlebar frame.

[0081] The side bars may be pivotally connected to the base. The side bars may be lockable in the vehicle mounting configuration thus providing a fixed angle between the handlebar frame and the base of the chassis such that the handlebar frame can act as an anti-rotation device in the event of a collision.

[0082] The seating element may comprise a carrying handle. When the seating element comprises a carrying handle, e.g. if the seating element is an infant car seat comprising a carrying handle, the stroller system will have two handlebars; one is the handlebar of the carrying handle, and the other is the handlebar of the chassis.

[0083] The invention also relates to a method for installing a stroller system according to any of the preceding paragraphs in a vehicle, comprising:

[0084] - attaching the seating element to the base if not already attached,

[0085] - converting the chassis to the vehicle mounting configuration by collapsing the frame,

[0086] - placing the chassis onto a vehicle seat,

[0087] - securing the chassis with the seating element to the vehicle by threading a seat belt of the vehicle through the seat belt receiving and retaining means and fastening the seat belt to an anchor point of the vehicle. It is not necessary to detach the seating element from the chassis if the seating element is a car safety seat to be used during car travel.

[0088] The chassis may be placed with the support surface of the chassis against the seating portion of the vehicle seat. The chassis may be placed with the handlebar against the back rest of the vehicle seat.

[0089] The seating element can be attached to the chassis prior to placing the chassis in the vehicle seat or after.

[0090] The step of converting the chassis to the vehicle mounting configuration may include, when the frame comprises a front support and a rear support, folding the front and rear support in one movement. The step may also include releasing the frame from the extended configuration by releasing a locking mechanism of the frame.

[0091] The step of attaching the seating element to the base may include attaching an intermediate connecting element to the base and attaching the seating element to the intermediate connecting element.

[0092] The invention furthermore relates to a method for removing a stroller system that has been installed in a vehicle according to the method above for strolling, comprising:

[0093] - unfastening the seat belt from the anchor point,

[0094] - unthreading the seat belt from the seat belt receiving and retaining means

[0095] - removing the chassis and the seating element from the vehicle,

[0096] - converting the chassis to the stroller configuration by extending the frame.

[0097] It is not necessary to detach the seating element from the chassis if the seating element is to be used for strolling.

[0098] The step of converting the chassis to the stroller configuration may include, when the frame comprises a front support and a rear support, unfolding the front and rear support in one movement. The step may also include releasing the frame from the collapsed configuration by releasing a locking mechanism of the frame.

[0099] In a second aspect, the invention relates to a chassis for detachably connecting a seating element for a child thereto. The chassis comprises a base supported by a frame with wheels and the chassis is configured for converting between at least a stroller configuration and a vehicle mounting configuration, wherein in the stroller configuration, the wheels are located below the base with the frame in an extended configuration, wherein in the vehicle mounting configuration, the wheels are retracted with the frame in a collapsed configuration. The base is configured for detachably connecting a seating element for a child thereto in both of the stroller configuration and the vehicle mounting configuration. The chassis is configured for being installed in a vehicle seat when in the vehicle mounting configuration . The frame comprises a front support provided with one or more front wheels, and a rear support provided with one or more rear wheels, and the front support and the rear support are configured for folding in the same direction when the frame is converted from the extended to the collapsed configuration. The front support and the rear support are coupled by a folding mechanism, the folding mechanism being configured to fold the front support and the rear support in conjunction from extended to collapsed configuration of the frame.

[0100] The chassis may be according to any of the preceding paragraphs as described in relation to the first aspect. The chassis may comprise a handlebar.

[0101] The seating element may be according to any of the preceding paragraphs as described in relation to the first aspect.

[0102] In a third aspect, the invention relates to a stroller system comprising a chassis and a seating element attached to the chassis, wherein the chassis is configured for converting between at least a stroller configuration and a vehicle mounting configuration, wherein the stroller system is configured for being installed in a vehicle seat when the chassis is in the vehicle mounting configuration, wherein the seating element comprises seat belt receiving and retaining means for securing the seating element with the chassis in the vehicle seat, and wherein the chassis comprises a handlebar for pushing the chassis when in the stroller configuration, and wherein when the chassis is in the vehicle mounting configuration and the stroller system is secured in a vehicle seat, the handlebar is arranged such that it is supported against a back rest of the vehicle seat, and the handlebar is configured for preventing rearwards rotation of the stroller system in the event of a sudden change of velocity of the vehicle.

[0103] Thus, the seating element can be permanently attached to the chassis, i.e. the seating element is not detachable.

[0104] The handlebar may be attached to a frame of the chassis. The seating element may comprise a carrying handle.

[0105] The chassis may be according to any of the preceding paragraphs as described in relation to the first aspect.

[0106] The seating element may be according to any of the preceding paragraphs as described in relation to the first aspect. Thus, in some embodiments, the seating element of the stroller system of the third aspect is detachable from the chassis.

[0107] BRIEF DESCRIPTION OF THE DRAWINGS

[0108] The following drawings are appended to facilitate the understanding of the invention. The drawings show embodiments of the invention, which will now be described by way of example only, where:

[0109] Figure 1 shows a side view of a stroller system comprising a chassis and a seating element attached to the chassis, the seating element being arranged rear-facing.

[0110] Figure 2 shows a side view of a chassis for detachably connecting a seating element for a child thereto.

[0111] Figure 3 shows a side view of a stroller system comprising a chassis and a seating element arranged in a vehicle seat, the seating element being arranged rear-facing.

[0112] Figure 4 shows a perspective view of a chassis for detachably connecting a seating element for a child thereto.

[0113] Figure 5 shows a perspective view of a base of a chassis, the base comprising an intermediate connecting element, wherein the left side shows the assembled state and the right side shows an exploded view,

[0114] Figure 6 shows a perspective view of the base of Fig. 5, wherein the intermediate connecting element is installed on the base in the opposite direction of that of Fig. 5, and wherein the left side shows the assembled state and the right side shows an exploded view.

[0115] Figure 7 shows a perspective view of a base of a chassis, the base comprising an intermediate connecting element, the intermediate connecting element comprising a connection interface for a seating element which is different from that of Fig. 5 and Fig. 6, wherein the left side shows the assembled state and the right side shows an exploded view.

[0116] Figure 8 shows a cross-sectional view of a chassis with a seating element attached, the seating element being an infant car safety seat arranged rear facing.

[0117] Figure 9 shows a bottom perspective view of a seating element comprising a connection interface for connecting to an intermediate connecting element.

[0118] Figure 10 shows a cross-sectional view of a chassis with a seating element attached, the seating element being a toddler car safety seat arranged forward-facing. Figure 11 shows a side view of a chassis with seating element attached, the seating element being arranged rear facing, and wherein an intermediate connecting element as shown in Fig. 7 is used to connect the seating element to the base of the chassis.

[0119] Figure 12 shows a perspective view of a stroller system comprising a chassis and a seating element, the seating element being a buggy seat, wherein the left side shows the assembled state and the right side shows the buggy seat detached from the chassis and partly folded.

[0120] Figure 13 shows a seating portion of the buggy seat frame of the buggy seat of Fig. 12, wherein the left side shows the assembled state on the chassis and the right side shows an exploded view.

[0121] Figure 14 shows a side view of a stroller system 10 according to Figure 12, wherein the chassis with the buggy seat is in a storage configuration XC.

[0122] DETAILED DESCRIPTION OF THE INVENTION

[0123] Having generally described this invention, a further understanding can be obtained by reference to certain specific embodiments, which are provided herein for purposes of illustration only, and are not intended to limit the scope of the claims unless otherwise specified.

[0124] Figure 1 shows a side view of a stroller system 10 comprising a chassis 100 and a seating element 200 attached to the chassis, the seating element 200 being arranged rear-facing. The seating element 200 is an infant car safety seat. The chassis 100 comprises a base 110 supported by a frame 120 with wheels 135, 145, ref. Fig. 2. The chassis 100 is here shown in a stroller configuration SC, in which configuration the frame 120 is extended so that the chassis 100 is rollable on the ground using the wheels 135, 145. The front of the chassis 100 is the part seen on the right side of the Figure, and the rear part of the chassis 100 is the part seen on the left side of the Figure, where the handlebar 410 is located. The seating element 200 comprises a connection interface CI-2 for detachable connection to a connection interface CI-1 of the base 110 of the chassis 100. In a variation, the stroller system 10’ comprises a chassis 100’ and a seating element 200’ permanently attached to the chassis 100’ , but otherwise similar to the stroller system 10. The seating element 200, 200’ comprises seat belt receiving and retaining means 212, and the chassis 100, 100’ comprises a handlebar 410.

[0125] Figure 2 shows a side view of a chassis 100 for detachably connecting a seating element 200, 210 for a child thereto. The chassis 100 is shown in the stroller configuration SC and comprises a base 110 to which a seating element 200, 210 can be attached, and a frame 120. The frame 120 comprises a front support 130 provided with front wheels 135 and a rear support 140 provided with rear wheels 145. The front support 130 comprises two front legs 131, i.e. a left and a right leg, and the rear support 140 comprises two rear legs 141, i.e. a left and a right leg, better seen in Fig. 4. In the stroller configuration SC, the frame 120 is extended and the wheels 135, 145 are located below the base 110. The chassis 100 also comprises a handlebar 410 to be used for pushing the chassis 100 when in the stroller configuration SC.

[0126] The front support 130 is pivotally connected to a rear portion 112 of the base 110, and the rear support 140 is pivotally connected to a front portion 111 of the base 110, such that the front support 130 and the rear support 140 cross each other. The base 110 comprises a body that extends laterally across the chassis 100 from the left side legs to the right side legs. Thus, the rear legs 141 are connected to the base 110 at laterally opposed sides at a front portion 111 of the base 110, and, the front legs 131 are connected to the base 110 at laterally opposed sides at the rear portion of the base 110.

[0127] The chassis 100 comprises a folding mechanism 170 comprising a couple bar 171 at each side of the chassis 100, each couple bar 171 connecting the front leg 131 and the rear leg 141 of the respective side of the chassis 100. The couple bar 171 is connected to the rear leg 141 and to the front leg 131 at a location below where the rear leg 141 crosses the front leg 131. The folding mechanism 170 is thus a four-bar folding mechanism comprising as the four bars on each side of the chassis 100 the base 110, a portion of a front leg 131, a portion of the rear leg 141, and the couple bar 170. The folding mechanism 170 will be explained in more detail in relation to Fig. 3.

[0128] Figure 3 shows a stroller system 10 comprising a chassis 100 and a seating element 200 in the form of an infant car safety seat arranged in a vehicle seat 500, the seating element 200 being arranged rear-facing. The stroller system 10 may be equal to the stroller system 10 shown in Fig. 1 and the chassis 100 may be equal to the chassis 100 of Fig. 2. The chassis 100 is here shown in a vehicle mounting configuration VC, in which configuration the frame 120 is collapsed and the wheels 135, 145 are retracted. The front support 130 and the rear support 140 are folded forwards so that the front wheels 135 and the rear wheels 145 are located below a head end of the seating element 200.

[0129] The seating element 200 comprises seat belt receiving and retaining means 212 through which the seat belt of the vehicle may be threaded in order to firmly secure and anchor the car safety seat in the vehicle. The seat belt receiving and retaining means 212 may e.g. be in the form of two belt guides at each side of the car seat and one belt guide at the rear side of the car seat. Securing a car safety seat in a vehicle using such belt guides is a well-known method for the skilled person.

[0130] A support portion 101 of the chassis 100 is supported against a seating portion 520 of the vehicle seat 500. The support portion 101 comprises a lower support surface including a bottom surface of the base 110 and a portion of each of the rear legs 141. The seating portion 520 is a seat cushion. The wheels 135, 145 are retracted to a position above the support portion 101, i.e. above a plane defined by the lower support surface, so that they do not interfere with the placement of the support portion 101 on the seat cushion. The wheels 135, 145 are also located forwards of, i.e. in front of, the support portion 101 and thus in front of the seat cushion, such that no part of the vehicle seat 500 extends to the area below the wheels 135, 145. The rear wheels 145 are arranged laterally offset on the chassis 100 relative to the front wheels 135 so that they do not interfere when the frame 120 is collapsed, and thus it allows the rear wheels 145 to align laterally with the front wheels 135 when the frame 120 is collapsed. In Fig. 3, the rear wheels 145 and the front wheels 135 are laterally aligned with their respective rotational axis being coaxial.

[0131] When converting the chassis 100 from the stroller configuration SC to the vehicle mounting configuration VC, a release mechanism may be triggered to allow the frame 120 to be collapsed. When collapsing the frame 120, the rear support 140 and the front support 130 are folded in the same direction towards the front of the chassis 100. Because of the folding mechanism 170 with the couple bar 171, when rotating the rear legs 141 forwards towards the collapsed position, the couple bars 171 ensures that the front legs 131 are also rotated. Thus, the front support 130 and the rear support 140 can be folded in one movement, e.g. by manipulating only the rear support 140 towards the collapsed position, the front support 130 will follow.

[0132] Figure 4 shows a perspective view of a chassis 100 for detachably connecting a seating element 200, 210 for a child thereto. The chassis 100 may be equal to the chassis 100 of Fig. 2. As seen in Figure 4, the base 110 comprises a body that extends laterally across the chassis 100, from the left to the right side of the chassis 100, providing a top surface of the base. In Fig. 4 a first connection interface CI-1 of the base 110 is shown at the top surface of the base 110. The first connection interface CI-1 is located centrally between the left and right side of the chassis 100. The first connection interface CI- 1 is for detachably connecting either a first seating element 200 or an intermediate connecting element 300, 310. The first connection interface CI-1 comprises mating features in the form of a recess at the top surface of the base 110 and a set of pin holes at each side of the recess. The base 110 may thus comprise front and rear mating features, here shown as front and rear pin holes. A first seating element 200, like the one shown in Fig. 1 and Fig.3, or an intermediate connecting element 300, 310 provided with a complementary second connection interface CI-2 may thus be connected to the base 110. The second connection interface CI-2 may e.g. comprise a shape suitable for insertion in the recess of the base 110, and a set of pins for insertion into the pin holes. A seating element 200 may thus comprise front and rear mating features complementary to the front and rear mating features of the base 110 for a secure and stable connection.

[0133] All features of the chassis and the seating element described in relation to Fig. 1 -4, except for those related to the detachability of the seating element, may be applied for a stroller system 10’ comprising a permanently attached seating element 200’ .

[0134] Figures 5 to 7 each shows in perspective view a base 110 of a chassis 100, the base 110 comprising an intermediate connecting element 300, 310, wherein the left side of the figures shows the assembled state and the right side shows an exploded view. The intermediate connecting element 300, 310 comprises a second connection interface CI-2 comprising front and rear mating features, here in the form of front and rear sets of pins (each set comprising left and right pins). In Figures 5 and 6, the same intermediate connecting element 300 is shown, but installed in two opposite directions, i.e. in Figure 6, the intermediate connecting element 300 is turned around 180 degrees compared to Figure 5, in order to allow a seating element 210 to be mounted to the chassis 100 rear-facing or forwards-facing. In Figure 7 a different intermediate connecting element 310 is shown. The intermediate connecting element 310 of Figure 7 has the same mating features of the second connection interface CI-2 as the intermediate connecting element 300 of Figures 5 and 6 so that it can be mounted to the same chassis 100. However, the intermediate connecting elements 300, 310 each comprises a third connection interface CI-3, CI-3’ for connecting a second seating element 210 thereto. The third connection interface CI-3 of the intermediate connecting element 300 of Figures 5 and 6 comprises mating features in the form of two longitudinal protrusions comprising a clamping element at each end, i.e. front and rear mating features. Thus, the intermediate connecting element 300 provides front and rear mating features for the base 110 to connect to complementary front and rear mating features of a seating element 210. The third connection interface CI-3’ of the intermediate connecting element 310 of Figure 7 comprises a different set of mating features in the form of two sideways extending wings. Thus, using the different intermediate connecting elements 300, 310, various types of second seating elements 210, e.g. car safety seats of different manufacturers, may be mounted to the same chassis 100. The intermediate connecting element 300, 310 thus functions as an adapter, and also allows for switching between mounting the seating element 210 forwards -facing or rearwards- facing.

[0135] Figure 8 shows a cross-sectional view of a stroller system 10 comprising a chassis 100 in the stroller configuration SC and a second seating element 210 attached thereto rear-facing. The base 110 comprises an intermediate connecting element 300, which can be equal to that of Figure 5 and Figure 6. The seating element 210 is different from the seating element 200 of Fig. 1 in that it is an infant car safety seat provided with a fourth connection interface CI-4. The fourth connection interface CI-4 is compatible with the third connection interface CI-3 of the intermediate connecting element 300. The infant car seat 210 may therefore comprise front and rear mating features provided by the fourth connection interface CI-4. The infant car safety seat comprises a carrying handle 211 and seat belt receiving and retaining means 212.

[0136] Figure 9 shows a bottom perspective view of a seating element 210 comprising a fourth connection interface CI-4 for connecting to the third connection interface CI-3 of an intermediate connecting element 300. Two longitudinal recesses provided with front and rear mating features in the form of pins for connection to the front and rear clamping elements of the intermediate connecting element 300 can be seen. The seating element 210 may be the infant car safety seat of Figure 8. In order to arrange the seat forwards -facing on the chassis 100, the intermediate connecting element 300 may be removed, and re-installed on the chassis in the opposite direction, i.e. as shown in Fig. 6.

[0137] Figure 10 shows a cross-sectional view of a stroller system 10 comprising a chassis 100 in the stroller configuration SC and a seating element 210 attached thereto. The seating element 210 is a toddler car safety seat arranged forward-facing and comprising a fourth connection interface CI-4 equal to that of the infant car seat of Fig. 9. The base 110 comprises an intermediate connecting element 300, which can be equal to that of Figure 5 and Figure 6, but which is shown in Figure 10 installed in the same direction as in Figure 6. Because the base comprises front and rear mating features, here provided by the intermediate connecting element 300, connection to a toddler seat is possible using front and rear mating features provided on an underside of the toddler seat.

[0138] Figure 11 shows a side view of a stroller system 10 comprising a chassis 100 in the stroller configuration SC and a seating element 210 attached thereto. The seating element 210 is an infant car safety seat arranged rear-facing and provided with a fourth connection interface CI-4’. The base 110 comprises an intermediate connecting element 310, which can be equal to that of Figure 7. The infant car safety seat comprises a carrying handle 211 and seat belt receiving and retaining means 212. The infant car safety seat of Fig. 11 can be from a different manufacturer than that of Fig. 8, thus being provided with a different set of mating features on the fourth connection interface CI-4’.

[0139] Figure 12 shows a perspective view of a stroller system 10 comprising a chassis 100 in the stroller configuration SC and a seating element 200 attached thereto, wherein the left side figure shows the seating element 200 attached to the chassis 100, and wherein the right side figure shows the seating element 200 detached from the chassis 100 and partly folded. The seating element 200 is a buggy seat arranged forward-facing. Such buggy seat will typically comprise a frame, which is the part attached to the chassis 100, and a cover, liner or the like with padding, forming the seating portion and back rest surface for the child. The buggy seat is mountable directly to the base 110 of the chassis 100, without the use of an intermediate connecting element 300, 310. The chassis 100 may be equal to the chassis 100 of Fig. 2 and thus the connection interface CI-1 of the base 110 may be as described in relation to Figure 4. The buggy seat is thus provided with a second connection interface CI-2 complementary to the connection interface CI-1 of the base 110. This can be better seen in Figure 13, which shows a seating portion of the buggy seat frame of the buggy seat of Fig. 12, wherein the left side shows the assembled state and the right side shows an exploded view.

[0140] Figure 14 shows a side view of a stroller system 10 according to Figure 12, wherein the chassis 100 with the buggy seat 200 is in a storage configuration XC. The frame 120 of the chassis 100 is collapsed in the same manner as in the vehicle mounting configuration VC, ref. e.g. Fig. 3, and in addition, the handlebar frame 400 is pivoted forwards over and against the frame 120, such that the chassis 100 is as compact as possible and thus takes up very little space when stored or transported.

[0141] A stroller system 10 may comprise a chassis 100 and a combination of seating elements 200, 210 as described in relation to any of the figures above. For example, a stroller system 10 may comprise an infant car safety seat provided with a second connection interface CI-2 for direct installation onto the first connection interface CI-1 of the base 100, a toddler car safety seat provided with a fourth connection interface CI-4, CI-4, and an intermediate connecting element 300, 310 for enabling attachment of the toddler car safety seat to the chassis 100. Various other combinations may of course also apply as the user can selectively attach the desired seating element to the chassis, using an intermediate connecting element if necessary. Moreover, the provision of front and rear mating features on the base 110 enables connection of both infant car seats and toddler seats.

[0142] In the preceding description, various aspects of the independent claims have been described. For purposes of explanation, specific numbers, systems and configurations were set forth in order to provide a thorough understanding of the invention and its workings. However, this description is not intended to be construed in a limiting sense. Various modifications and variations of the illustrative embodiments, as well as other embodiments of the system, which are apparent to persons skilled in the art to which the disclosed subject matter pertains, are deemed to lie within the scope of the present invention as defined in the attached claims. LIST OF REFERENCE NUMBERS

Claims

CLAIMS1. A chassis (100) for detachably connecting a seating element (200, 210) for a child thereto, comprising a base (110) supported by a frame (120) with wheels (135, 145), wherein the chassis (100) is configured for converting between at least a stroller configuration (SC) and a vehicle mounting configuration (VC), wherein in the stroller configuration (SC), the wheels (135, 145) are located below the base (110) with the frame (120) in an extended configuration, wherein in the vehicle mounting configuration (VC), the wheels (135, 145) are retracted with the frame (120) in a collapsed configuration, wherein the base (110) is configured for detachably connecting a seating element (200, 210) for a child thereto in both of the stroller configuration (SC) and the vehicle mounting configuration (VC), wherein the chassis (100) is configured for being installed in a vehicle seat (500) when in the vehicle mounting configuration (VC), and wherein the chassis (100) comprises a handlebar (410) for pushing the chassis (100) when in the stroller configuration (SC).

2. The chassis (100) according to claim 1, wherein the base (110) comprises a body that extends laterally across the chassis (100).

3. The chassis (100) according to claim 1 or 2, wherein the base (110) comprises front and rear mating features for connection to complementary front and rear mating features of the seating element (200, 210).

4. The chassis (100) according to any of the preceding claims, wherein the base (110) comprises a first connection interface (CI-1) for detachably connecting a first type of seating element (200) or an intermediate connecting element (300, 310) thereto.

5. The chassis (100) according to claim 4, wherein the base (110) comprises an intermediate connecting element (300, 310) attachable to the base (110), wherein the intermediate connecting element (300, 310) comprises a second connection interface (CI-2) configured for detachably connecting to the first connection interface (CI-1) of the base (110) and wherein the intermediate connecting element (300, 310) comprises a third connection interface (CL3, CI-3’) for detachably connecting a second type of seating element (210) thereto.

6. The chassis (100) according to any of the preceding claims, wherein the base (110) is configured to allow the seating element (200, 210) to be connected to the base in two opposite directions.

7. The chassis (100) according to any of the claims 4 - 6, wherein the first connection interface (CI-1) is configured to allow the first type of seating element (200) or the intermediate connecting element (300) to be connected to the base (110) in two opposite directions.

8. The chassis (100) according to any of the preceding claims, wherein the frame (120) comprises a front support (130) provided with one or more front wheels (135), and a rear support (140) provided with one or more rear wheels (145), and wherein the front support (130) and the rear support (140) are configured for folding in the same direction when the frame (120) is converted from the extended to the collapsed configuration.

9. The chassis (100) according to claim 8, wherein the front support (130) is pivotally connected to a rear portion (112) of the base (110) and wherein the rear support (140) is pivotally connected to a front portion (111) of the base (110), such that when the frame (120) is in the extended configuration, the front support (130) and the rear support (140) cross each other.

10. The chassis (100) according to claim 8 or 9, wherein the front support (130) and the rear support (140) are coupled by a folding mechanism (170), the folding mechanism (170) being configured to fold the front support (130) and the rear support (140) in conjunction from extended to collapsed configuration of the frame (120).

11. The chassis (100) according to any of the claims 8-10, wherein the rear wheels (145) are laterally offset relative to the front wheels (135).

12. The chassis (100) according to any of the preceding claims, wherein, when the chassis (100) is in the vehicle mounting configuration (VC), the handlebar (410) is arranged such that, when in use in a vehicle seat (500), the handlebar (410) is supported against a back rest (510) of the vehicle seat (500).

13. A stroller system (10) comprising a chassis (100) according to any of the preceding claims and a seating element (200, 210).

14. The stroller system (10) according to claim 13, wherein the seating element (200, 210) comprises seat belt receiving and retaining means (212) for securing the seating element (200, 210) with the chassis (100) in a vehicle seat (500).

15. The stroller system (100) according to claim 14, wherein, when the chassis (100) is in the vehicle mounting configuration (VC), the handlebar (410) is arranged such that, when the chassis (100) with the seating element (200, 210) is secured in a vehicle seat (500), the handlebar (410) is supported against a back rest (510) of the vehicle seat (500), and the handlebar (410) is configured for preventing rearwards rotation of the chassis (100) with the seating element (200, 210) in the event of a sudden change of velocity of the vehicle.

16. The stroller system (10) according to any of the claims 13 - 15, wherein the seating element comprises a carrying handle (211).

17. A method for installing the stroller system (10) according to any of the claims 14-16 in a vehicle, comprising:- attaching the seating element (200, 210) to the base (110) if not already attached,- converting the chassis (100) to the vehicle mounting configuration (VC) by collapsing the frame (120),- placing the chassis (100) onto a vehicle seat (500),- securing the chassis (100) with the seating element (200, 210) to the vehicle by threading a seat belt of the vehicle through the seat belt receiving and retaining means (212) and fastening the seat belt to an anchor point of the vehicle.

18. A method for removing a stroller system (10) that has been installed in a vehicle according to the claim 17 for strolling, comprising- unfastening the seat belt from the anchor point,- unthreading the seat belt from the seat belt receiving and retaining means (212)- removing the chassis (100) and the seating element (200, 210) from the vehicle,- converting the chassis (100) to the stroller configuration (SC) by extending the frame (120).

Citation Information

Patent Citations

  • Baby safety car seat convertible into a rollable baby seat

    EP2505454A2

  • Infant car seat assembly

    US20140151969A1

  • Systems and methods for adding wheels to an infant child seat

    US20220388561A1

  • Pushchair

    EP0522783A2

  • Baby seat converter

    GB2381776A