Patent Publication Number: US-2023159079-A1

Title: Child transportation system

Description:
FIELD OF THE DISCLOSURE 
     The present disclosure relates generally to a child transportation system and finds particular, although not exclusive, utility in providing a child transportation system that is adaptable to the needs of a parent or guardian and their child as the child grows, including but not limited to a width adjustable pram and/or stroller. 
     BACKGROUND 
     Parents and guardians of children typically make use of a perambulator, typically and hereinafter called a pram, to transport a child. The term “pram” used herein if intended to be a reference to a perambulator, buggy, pushchair, stroller, umbrella folding stroller or carriage. A pram may be used to transport babies and relatively young infants, and may provide a relatively horizontal surface for the baby or infant to be transported upon in a flat lying position. A pram may also be used to transport relatively older infants, and may provide a seat arrangement for the infant to be transported in a sitting position. 
     Furthermore, in some countries, it is a legal requirement for babies, infants and children under a certain age and/or height to be provided with a supplemental car seat when travelling in a vehicle. Such car seats typically improve the child&#39;s safety when travelling in a vehicle, particularly in a collision scenario, when compared to the use of a typical seat belt alone. The shape, size and arrangement of the car seat is typically dependent on the child&#39;s age and/or height. A child may be required to use a so-called baby car seat from birth until approximately 1 year old, a so-called toddler car seat from approximately 1 year old to approximately 4 years old, and a so-called booster seat from approximately 4 years old until the child no longer requires the use of a child specific car seat. 
     However, babies and infants grow quickly and may outgrow conventional car seats and prams within a year or two years. Therefore, a parent or guardian must typically provide several car seats and prams for their child. Furthermore, a pram offering optimal comfort or safety may not be convenient when travelling or for city living. 
     Aspects of the present disclosure seek to provide a child transportation system that can be used as a child grows from infant to a toddler and older, typically up to 6 years old. The invention also seeks to provide a versatile arrangement in which components of a car seat system can be used in combination as part of an adaptable pram and stroller system. 
     SUMMARY 
     According to a first aspect of the present disclosure, there is provided a child transportation system comprising a frame, wherein the frame comprises: a first frame member telescopically attached to a second frame member; a rear wheel set and a front wheel set; and an infant carrier attachment mechanism configured and arranged to permit, in use, an infant carrier module to be releasably attached to the frame or a seat; wherein the first frame member is telescopically moveable relative to the second frame member to adjust a width of the frame between a compact arrangement, in which the frame has a first width, and a comfort arrangement, in which the frame has a second width greater than the first width. 
     A key advantage of the child car seat system is that the frame may be selectively arranged in the compact mode for travel or city living, and in the comfort mode to provide a more comfortable experience for the infant. Furthermore, a component of a car seat system or other such system arranged to carry an infant may be docked on the wheeled frame via the infant carrier attachment mechanism to form a pram. In this way, an infant need not be removed from their seat to move the infant from a vehicle car seat to a pram. 
     The system may be adjusted to suit the needs of an infant. Accordingly, there is no need to provide additional components to continue use of the system with the growing child. Additionally, there is no need to dispose of components or systems as the child grows as is typical in this industry, thereby providing a more sustainable system. Furthermore, as the system is adaptable to the needs of a growing infant, the system may have a relative long usable life when compared to typical prams and strollers. 
     The child transportation system may further comprise an infant carrier module configured to receive an infant therein. The infant carrier module may comprise a frame attachment mechanism configured to interconnect with the infant carrier attachment mechanism to releasably attach the infant carrier module to the frame or seat. The infant carrier module may comprise a seat portion, a backrest portion, a connector portion there between and a locking hinge, wherein the locking hinge is securable in at least two positions such that the seat portion and the backrest portions are relatively positionable in at least two angles. In this way, the infant may be reclined or may lie flat, as well as sit upright. The upright position may provide a comfortable sitting position for the infant and the lie flat position may mimic or provide similar conditions to a bassinet. Accordingly, a more flexible system may be provided, potentially eradicating the need for a parent or guardian to provide different systems or modules. 
     The frame attachment mechanism may comprise a first socket on a first side of the infant carrier module and a second socket on a second side of the infant carrier module. Each socket may be configured to receive and releasably retain a protrusion of the infant carrier attachment mechanism therein. The sockets on the infant carrier module may connect to the seat, and in particular to a bumper bar housing of the seat. Accordingly, an integrated system may be provided. 
     The term “infant” used herein may refer to a toddler or a child. The term “pram” used herein if intended to be a reference to a perambulator, buggy, pushchair, stroller, umbrella folding stroller or carriage. 
     The frame may be arrangeable in a third position. When arranged in the third position, the frame may have a width greater than that of the compact and comfort arrangements. The system may comprise a second seat structure such as a second infant carrier module, a second seat, or a combination thereof. The two seat structures may be arrangeable in a side-by-side arrangement, optionally with a connecting member between the two seat structures, or a tandem arrangement. Alternatively, a relatively large single seat structure may be provided that is suitable for use by two or more infants. Accordingly, with the frame in the third position, the system may be suitable to transport two or more infants, such as siblings. 
     The first and second frame members may be left and right halves of the frame. Alternatively, the first and second frame members may be frame sub portions, such as left and right handle portions. The frame may comprise a plurality of tubular frame members. The frame members may comprise a plastic, a metal, a combination of plastics and metals, or any other known material. Frame members being telescopically attached may mean than one frame member may be slidably received within another frame member. 
     The frame may comprise a handle. The handle may include a first handle portion attached to the first and second frame members and a second handle portion telescopically attached to the first handle portion such that the handle is height adjustable. The second handle portion may be configured to be held by a user to manoeuvre the child transportation system. The second handle portion may be releasably securable relative to the first handle portion at a plurality of positions via a handle lock. In this way, the height of the handle may be adjusted according to the preferences of a user. The second handle portion may further comprise a handle release actuator operable to selectively release and engage the handle lock. Accordingly, a user may adjust the height of the handle by actuating the handle release actuator. 
     The handle release actuator may comprise a rotatable handle portion. The rotatable handle portion may be rotatable between a locking position, in which the handle lock prevents height adjustment of the handle, and a height release position, in which the handle lock is disengaged and the handle is height adjustable. In this way, a user may adjust the height of the handle by rotating the rotatable handle portion into the height release position, rearrange the first and second handle portions, and rotate the rotatable handle portion back into the locking position to secure the handle at the desired height. The rotatable handle portion may be rotatable through approximately 15° to 120°, approximately 30° to 90°, approximately 45° to 75°, such as through 60°, when moving between the locking and height release positions. The handle lock may comprise at least one latch pin configured to engage with the first and second handle portions to prevent relative movement of the first and second handle portions when the release actuator is arranged in the locking position. Rotation of the rotatable handle portion from the locking position to the height release position may pull or retract the at least one latch pin, via a connection member such as a wire, away from the first or second handle portion such that relative movement of the first and second handle portions is possible. Accordingly, the rotatable handle portion may be provided away from the latch pin in a position more preferable for a user. 
     The first handle portion may be attached to the first and second frame members via a handle hinge. The handle hinge may be configurable in a first orientation, in which the handle is extended, and a second orientation, in which the handle is folded. In this way, the handle may be folded or collapsed, when not in use. The handle hinge may comprise a handle hinge lock operable to releasably secure the handle hinge in the first orientation. The rotatable handle portion may be further rotatable to a fold release position, in which movement of the handle hinge from the first position to the second position is possible. As such, a single actuator may be provided to allow a user to both fold and adjust the height of the handle. Movement of the handle hinge from the first position to the second position may be prevented when the rotatable handle portion is arranged in the locking position. In this way, with the rotatable handle portion arranged in the locking position, both folding and height adjustment of the handle may be prevented. 
     The rotatable handle portion may be rotatable from the height release position to the fold release position by rotating the rotatable handle portion away from the locking position. The handle release actuator may further comprise a secondary lock. The secondary lock may be moveable, such as slidable or otherwise reconfigurable, between a lock position, in which rotation of the rotatable handle portion from the height release position to the fold release position is prevented, and a release position, in which rotation of the rotatable handle portion from the height release positon to the fold release position is possible. In this way, accidental rotation from the height release position to the fold release position may be prevented. Rotation of the rotatable handle portion from the height release position to the fold release position may disengage the handle hinge lock via a connection member, such as a wire. Accordingly, the rotatable handle portion may be positioned away from the handle hinge lock. The secondary lock may be moveable to the release position only when the handle is arranged in a lowest possible height position. 
     The child transportation system may further comprise a width adjustment lock operable to selectively prevent relative movement of the first and second frame portions, and any other frame portions. The width adjustment lock may be configured to secure the first and second frame portions in at least two relative positions. In this way, the frame may be secured in a plurality of widths. The child transportation system may further comprise a width adjustment release actuator operable to selectively release and engage the width adjustment lock. The width adjustment release actuator may be positioned on the second handle portion. The width adjustment release actuator may be adjacent to the rotatable handle portion. In this way, the handle adjustment actuator and the width adjustment actuator may be provided in the same location on the handle. The width adjustment release actuator may be provided in two parts, with one part provided on each side of the rotatable handle portion. The width adjustment release actuator may be rotatable between a width unlock position, in which the width lock is disengaged and relative movement of the first and second frame members is possible, and a width lock position, in which the width lock is engaged and relative movement of the first and second frame members is prevented. The width adjustment release actuator may be rotatable through approximately 45° to 75°, such as through 60° 
     Each of the first and second frame members may include an upper sub portion attached to the handle, a front sub portion attached to a wheel of the front wheel set and a rear sub portion attached to a wheel of the rear wheel set. Each sub portion of the first and second frame members may each be attached via a first and second side joint mechanism respectively. In this way, the frame may be collapsible by operating the first and second side joints. The first and second side joint mechanisms may comprise the handle hinge. Accordingly, all components may hinge about the same point when collapsing the frame. The handle may be fixedly attached to the upper sub portions of the first and second frame members. Accordingly, the handle may be collapsed by rotating the upper sub portions. 
     The frame may be configurable in an extended arrangement, in which the sub portions are spaced and the system is suitable for transporting an infant, and a collapsed position, in which the sub portions are adjacent along their lengths and the system is arranged for storage. Accordingly, the system may be arranged for use or for storage or travel. 
     The frame may further comprise a carry handle arranged such that, with the frame in the collapsed position, the carry handle is positioned on an opposite side of the frame to the first and second wheel sets such that the system is manoeuvrable on the first and second wheel sets by pushing or pulling the carry handle. A user may wheel the system along whilst holding the carry handle. The carry handle may also be conveniently positioned for lifting the system whilst in the collapsed arrangement. The carry handle may be positioned under the seat structure. In this way, the carry handle may be hidden from view in ordinary use of the system, but conveniently located when the frame is collapsed. The carry handle may be telescopic, foldable or otherwise adjustable in length. Accordingly, when the frame is in the collapsed position, the user may position the carry handle at a comfortable height such that the user may push or pull the carry handle to wheel the system along the ground. 
     The front sub portion of the first frame member may be attached to the front sub portion of the second frame member via a front cross member. The rear sub portion of the first frame member may be attached to the rear sub portion of the second frame member via a rear cross member. The front cross member and the rear cross member may be telescopically length adjustable. In this way, the front and rear cross members may facilitate width adjustment of the frame. The front cross member and the rear cross member may each comprise locks configured to selectively prevent length adjustment of the respective cross member. The locks may be rotatably or otherwise actuable to allow for telescopic length adjustment of the cross members. The cross members may provide stability to the frame. 
     The side joint mechanisms may comprise the infant carrier attachment mechanism or a further infant carrier attachment mechanism. In this way, the infant carrier module may attach and be held adjacent to a middle of the frame, which may provide a relatively strong and stable support to the infant carrier module. Alternatively, or additionally, the seat structure may comprise the infant carrier attachment mechanism. In particular, the bumper bar plug or socket on the seat may include the infant carrier attachment mechanism. 
     The infant carrier attachment mechanism may comprise a protrusion configured to be received, in use, by a corresponding integrated socket on said infant carrier module. The child transportation system may further comprise seat structure adapters configured to be attachment between the frame and the seat structure when the frame is arranged in the relatively wide arrangement. Accordingly, a single fixed width seat structure may be used regardless of the width setting of the frame. 
     The child transportation system may further comprise infant carrier adapters configured to be attachable to the infant carrier attachment mechanism to reduce a distance between a first side of the infant carrier attachment mechanism and a second side of the infant carrier attachment mechanism. The adapters may be used when the frame is arranged in the relatively wide comfort mode. The adapters may effectively extend the infant carrier mechanism or provide new attachment points. 
     The child transportation system may further comprise a seat portion releasably attachable to the infant carrier attachment mechanism. The seat portion may be configurable to, in use, provide a seat structure for an infant. The seat structure may be separate from the infant carrier module. The seat portion may comprise a secondary attachment mechanism configured to releasably attach said infant carrier module thereto, in use. In this way, several seating options may be provided such that a more preferable option may be chosen, particularly depending on the age and/or size of the infant. 
     The seat portion may comprise a bumper bar configured to be releasably attachable to the secondary attachment mechanism. The infant carrier module may be attachable to the frame or seat via bumper bar attachment points. As such, the bumper bar attachment points may be preferably used for several attachment purposes, negating the need for further dedicated attachment mechanisms. 
     The bumper bar may be rotatably attached to the frame or seat. The seat portion may comprise a backrest bar rotatably attached to the frame or to a further component of the seat, such as a side housing, and connected to the bumper bar via a gear drive. Adjustment of the bumper bar or the backrest bar may move the other of the bumper bar and the backrest bar via the gear drive. The gear drive may be configured such that a relative angle between the backrest bar and the bumper bar is selectively maintained at all orientations of the bumper bar. As such, the gear drive may connect the bumper bar and the backrest bar such that the bumper bar and backrest bar are always provided in relatively preferred positions. 
     The backrest bar may comprise a canopy including a shade member. The canopy may be releasably attachable to the backrest bar. Alternatively, the canopy may be releasably attachable to another component of the system. The canopy may be moveable between a stowed position, in which the shade member is retracted, and an extended position, in which the shade member is extended and is configured to, in use, provide a shelter for an infant being transported. The shade member may be waterproof or water resistant. 
     The seat structure may comprise a leg rest. The leg rest may be securable in a plurality of angular orientations relative to a lower seat member of the seat portion. In this way, a leg rest or foot rest may be provided to the infant in a preferable position. Accordingly, the system may be adjusted depending on the needs of the infant, which may change over time. 
     The leg rest may be curved, looped or otherwise wrap around a front of the seat structure. In particular, with the infant carrier module attached to the seat structure, the leg rest may wrap around and/or cocoon a lower or other portion of the infant carrier module. The leg rest may comprise a cover configured to enclose at least the infant&#39;s legs and provide a so-called cosy toes arrangement. Accordingly, there may be no need to provide an additional pram bassinet, as is typical, such that a more sustainable and/or a more environmentally friendly system is provided. 
     The seat portion may be arrangeable in an extended position, in which the seat structure is deployed, and a collapsed position, in which the seat structure is collapsed or stowed. In this way, the seat may be collapsed for storage or for travel and does not necessarily need to be detached from the frame for folding. 
     A first front wheel of the front wheel set may be releasably attached to the first frame member. A second front wheel of the front wheel set may be releasably attached to the second frame member. The child transportation system may further comprise replacement front wheels having a different width and/or diameter to the first and second front wheels. As such, the front wheels may be replaced for replacement wheels that are larger, smaller, more lightweight, more stable or otherwise preferably for a particular scenario or infant. 
     The front and/or rear wheel sets may comprise a suspension system. The respective wheel may be attached to the respective frame member via a wheel hinge and the suspension system may comprise a dampened spring. In this way, a more comfortable environment may be provided for the infant. 
     The rear wheel set may comprise two rear wheels connected via a rear axle. The two rear wheels and the axle may be releasably attached to the first and second frame members. The child transportations system may further comprise a replacement rear wheel set comprising replacement rear wheels, each having a different width and/or diameter to the rear wheels, connected via a replacement axle. As such, the rear wheels may be replaced for replacement wheels that are larger, smaller, more lightweight, more stable or otherwise preferably for a particular scenario or infant. The rear wheel set may comprise a brake system operable to selectively prevent rotation of at least one rear wheel of the rear wheel set. The brake system may comprise a brake pedal positioned on or adjacent to the axle and actuable by a user&#39;s foot. 
     The child transportation system may further comprise a basket configurable in a narrow orientation, wherein the basket has a first width, and a wide orientation, wherein the basket has a second width greater than the first width. In this way, the basket may be configurable according to the configuration of the frame. The basket may be configurable in other orientations such with a lesser width than the narrow orientation, a width between the narrow and wide orientations, or with a greater width than the wide orientation. The basket may comprise a zip or other fastener operable to gather excess material when the basket is configured in the narrow orientation. 
     EXAMPLE EMBODIMENTS 
     Example 1: A child transportation system comprising: a child car seat system comprising: a docking module configured to be securable to a vehicle seat; and an infant carrier module configured to receive an infant therein and arranged to be releasably docked with the docking module, the infant carrier module comprising a seat portion attached to a backrest portion via a locking hinge having two locking positions such that the infant carrier module is configurable in: an upright position in which the seat portion and the backrest portion are relatively inclined at a first angle; and a lie flat position in which the seat portion and the backrest portion are relatively inclined at a second angle, greater than the first angle; wherein the system is configured such that the infant carrier module is adjustable within the docking module; and a wheeled frame releasably attachable to the infant carrier module; wherein, in use with the infant carrier module attached to the wheeled frame, the infant carrier module is configurable in the upright position to form a first pram arrangement and in the lie flat position to form a second pram arrangement. 
     Example 2: A child transportation system comprising: an infant carrier module configured to receive an infant therein and arranged, the infant carrier module comprising a seat portion attached to a backrest portion via a locking hinge having two locking positions such that the infant carrier module is configurable in: an upright position in which the seat portion and the backrest portion are relatively inclined at a first angle; and a lie flat position in which the seat portion and the backrest portion are relatively inclined at a second angle, greater than the first angle; and a wheeled frame releasably attachable to the infant carrier module; wherein, in use with the infant carrier module attached to the wheeled frame, the infant carrier module is configurable in the upright position to form a first pram arrangement and in the lie flat position to form a second pram arrangement. 
     Example 3: The child transportation system of Example 1 or Example 2, wherein the wheeled frame includes two frame portions attached via two frame hinges, wherein the infant carrier module is attachable to the wheeled frame such that a first side of the infant carrier module is adjacent to a first of the two frame hinges and a second side of the infant carrier module, opposite the first side, is adjacent to a second of the two frame hinges; preferably wherein the seat attached to the wheeled frame includes a bumper bar attached, at a first end thereof, to a first side of the wheeled frame and is attached, at a second end thereof, to a second side of the wheeled frame, further wherein the infant carrier module is configured to be attachable to the wheeled frame via a bumper bar connection such that the infant carrier module is configured to be attachable to the wheeled frame adjacent to the first and second ends of the bumper bar. 
     Example 4: The child transportation system of Example 3, wherein the infant carrier module includes a first socket on the first side thereof and a second socket on the second side thereof, and the wheeled frame includes a first protrusion adjacent to the first frame hinge and a second protrusion adjacent to the second frame hinge, further wherein the sockets are configured to receive the protrusions therein to attach the infant carrier module to the wheeled base. 
     Example 5: The child transportation system of any of Examples 1 to 4, wherein the wheeled frame includes telescopic frame members configurable to arrange the wheeled frame between two frame arrangements having different widths. 
     Example 6: The child transportation system of Example 5, wherein the telescopic frame members are locked, such that relative movement is restricted, and unlocked, such that relative movement is possible, by rotating a collar into which the frame members may move to reduce the width of the wheeled frame. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The disclosure will be further described in embodiments identified in the accompanying figures in which: 
         FIG.  1    is perspective view of an adjustable pram frame; 
         FIG.  2    is a perspective sectional view of a handle actuator of the pram frame of  FIG.  1   ; 
         FIG.  3    is a cross-sectional view of the handle actuator of  FIG.  2   ; 
         FIG.  4    is a cross-sectional view of a handle adjustment mechanism of the pram frame of  FIG.  1   ; 
         FIG.  5    is a perspective view of the handle of the pram frame of  FIG.  1    in an extended configuration; 
         FIG.  6    is a perspective view of the handle of the pram frame of  FIG.  1    in a collapsed arrangement; 
         FIG.  7    is a cross-sectional view of a handle joint of the pram frame of  FIG.  1   ; 
         FIG.  8    is a perspective view of the pram frame of  FIG.  1    in a folded configuration; 
         FIG.  9    is a cross-sectional view of a width adjustment mechanism of the handle of  FIGS.  5  and  6   ; 
         FIG.  10    is an exploded view of a side joint mechanism of the pram frame of  FIG.  1   ; 
         FIG.  11    is a schematic side view of the side joint mechanism of  FIG.  10    in an extended configuration; 
         FIG.  12    is a schematic side view of the side joint mechanism of  FIG.  10    in a folded configuration; 
         FIG.  13    is a perspective view of the pram frame of  FIG.  1    with a seat structure; 
         FIG.  14    is a perspective view of the pram frame and seat structure of  FIG.  13    in a folded configuration; 
         FIG.  15    is an exploded view of a backrest angle adjustment mechanism of the seat of  FIG.  13   ; 
         FIG.  16    is a cross-sectional view of a bumper bar joint mechanism of the seat structure of  FIG.  13   ; 
         FIG.  17    is an exploded view of a seat detachment mechanism of the seat structure of  FIG.  13   ; 
         FIG.  18    is a perspective view of the pram frame of  FIG.  1    with the rear wheels and axle detached; 
         FIG.  19    is a cross-sectional view of a rear leg cross bar width adjustment mechanism; 
         FIG.  20    is a perspective view of a front leg cross bar width adjustment mechanism; 
         FIG.  21    is an exploded view of a front wheel of the pram frame of  FIG.  1   ; 
         FIG.  22    is an exploded view of a rear wheel of the pram frame of  FIG.  1   ; 
         FIG.  23    is a perspective view of the pram frame of  FIG.  1    with an infant carrier module attached thereto; 
         FIG.  24    is an exploded view of the pram frame with a seat structure of  FIG.  13   ; 
         FIG.  25    is a perspective view of an attachment adapter; 
         FIG.  26    is an exploded view of the pram frame with an infant carrier module of  FIG.  23   ; 
         FIG.  27    is a rear perspective view of the pram frame with a seat structure of  FIG.  13   ; 
         FIG.  28    is a first cross-sectional view of a memory lock mechanism; 
         FIG.  29    is a second cross-sectional view of the memory lock mechanism of  FIG.  28   ; 
         FIG.  30    is a perspective view of the backrest unlock handle shown in  FIG.  13    in a first arrangement; 
         FIG.  31    is a perspective view of the backrest unlock handle shown in  FIG.  13    in a second arrangement; 
         FIG.  32    is a perspective view of the backrest unlock handle shown in  FIG.  13    in a third arrangement; 
         FIG.  33    is a perspective view of the seat structure shown in  FIG.  13    with the backrest and bumper bar in a first orientation; 
         FIG.  34    is a perspective view of the seat structure shown in  FIG.  13    with the backrest and bumper bar in a second orientation; and 
         FIG.  35    is a perspective view of the seat structure shown in  FIG.  13    in a collapsed orientation. 
     
    
    
     DETAILED DESCRIPTION 
     The following description presents exemplary embodiments and, together with the drawings, serves to explain principles of the disclosure. However, the scope of the invention is not intended to be limited to the precise details of the embodiments, since variations will be apparent to a skilled person and are deemed also to be covered by the description. Terms for components used herein should be given a broad interpretation that also encompasses equivalent functions and features. In some cases, alternative terms for structural features may be provided but such terms are not intended to be exhaustive. 
     Descriptive terms should also be given the broadest possible interpretation; e.g. the term “comprising” as used in this specification means “consisting at least in part of” such that interpreting each statement in this specification that includes the term “comprising”, features other than that or those prefaced by the term may also be present. Related terms such as “comprise” and “comprises” are to be interpreted in the same manner. Directional terms such as “vertical”, “horizontal”, “up”, “down”, “top”, “bottom”, “upper” and “lower” are used for convenience of explanation usually with reference to the illustrations and are not intended to be ultimately limiting if an equivalent function can be achieved with an alternative dimension, orientation and/or direction. 
     The description herein refers to embodiments with particular combinations of features, however, it is envisaged that further combinations and cross-combinations of compatible features between embodiments will be possible. Indeed, isolated features may function independently as an invention from other features and not necessarily require implementation as a complete combination. 
     The general descriptive terms “child car seat” and “pram” related to the field of the disclosure are also not intended to be limiting. In the present field there are a wide range of terms applicable to the present disclosure and can be used interchangeably to describe the device, without affecting its scope and interpretation. For example, a “child car seat” can be a catch-all term for a safety device used by a baby, toddler or child for both sitting, reclining and/or laying down in a flat position, e.g. a booster seat or carrier respectively. The term “pram” used herein if intended to be a reference to a perambulator, buggy, pushchair, stroller, umbrella folding stroller or carriage. 
       FIG.  1    is perspective view of an adjustable pram frame  100 . The frame  100  includes a telescopic handle section  110  attached to a front wheel section  120  via side locking hinges  130 . A portion of the handle section  110  may be moved telescopically into or out of another portion to reduce or increase a height of the handle section  110 . The handle section  110  includes a proximal end intended to be held by a user when pushing or pulling the pram frame  100 . The proximal end of the handle section  110  includes a locking and unlocking handle actuator  140 . The handle actuator  140  may be used to lock or unlock the telescopic function of the handle section  110 , in particular by sliding or rotating a portion of the handle actuator  140  and is discussed in more detail with reference to  FIGS.  2  to  4   . 
     The frame  100  also includes a rear wheel section  150  attached to the handle section  110  and the front wheel section  120  via the locking hinges  130 . The locking hinges  130  may therefore be three way hinges. The frame  100  may be arranged in a pram configuration, as shown in  FIG.  1   , wherein the handle portion  110  and the front wheel portion  120  are substantially linear and the rear wheel section  150  extends away from the handle section  110  and the front wheel section  120  to form a generally ‘T’ shaped frame. Alternatively, the hinges  130  may be released and the frame  100  may be arranged in a collapsed arrangement, as discussed in more detail with reference to  FIG.  8   . 
     The front wheel section  120  includes a front cross member  121 , and the rear wheel section  150  includes a rear cross member  151 . Each of the cross members  121 ,  151 , shown as the lower horizontal members in  FIG.  1   , of the frame  100  are telescopic such that they are adjustable in length to adjust a width of the frame  100  between a relatively wide comfort arrangement and a relatively narrow compact arrangement. The locking actuator  140  may be actuated in a third manner to release a width locking of the frame  100  to allow for the width of the wheeled frame  100  to be adjusted, as discussed with reference to  FIG.  2   . 
     The front wheel section  120  includes front wheels  160  and the rear wheel section  150  includes rear wheels  170 . The front wheels  160  and the rear wheels  170  are releasably attached such that they are replaceable, as discussed with reference to  FIGS.  18  and  21   . 
       FIG.  2    is a perspective sectional view of a handle actuator  140  of the pram frame of  FIG.  1   . The handle actuator  140  includes a central actuator  141 , a lock slide  142  and two peripheral actuators  143  positioned at each end of the central actuator  141 . 
     To release the telescopic height adjustment of the handle section  110 , a user may rotate the central actuator  141  forward by approximately 60°. Other angles and backwards rotation are also envisaged. The unlocking of the locking mechanism is discussed with reference to  FIGS.  3  and  4   . After the central actuator  141  has been rotated forwards, the handle section  110  may be pushed or pulled to telescopically decrease or increase the height of the handle section  110 . Once the handle section  110  has been arranged at the preferred height, the central actuator  141  may be rotated back to the original starting position to lock the height adjustment of the handle section  141 . 
     The handle section  110  may also be folded or hinged about the side locking hinges  130  when the frame  100  is collapsed. To release the handle fold mechanism, a user may rotate the central actuator  141  beyond approximately 60° such as to approximately 120 °. The lock slide  142  is provided to selectively prevent the central actuator  141  being rotated beyond approximately 60°. Therefore, a user may actuate and hold the lock slide  142  whilst rotating the central actuator  141  beyond approximately 60°. The unlocking of the locking mechanism is discussed with reference to  FIGS.  3 ,  4  and  7   . Once the locking mechanism has been unlocked via rotation of the central actuator  141 , a user may fold or hinge the handle section about the side locking hinges  130 . The handle section  110  may only be folded or hinged about the side locking hinges  130  when arranged in a lowermost or shortest arrangement, as shown in  FIG.  6   . 
     A user may adjust the width of the frame  100  by lengthening or shortening the telescopic handle portion  110 , front cross member  121  and rear cross member  151 . The rear wheels  170  and axle may also be replaced, as discussed with reference to  FIG.  18   . To unlock the width locking mechanism, a user may rotate the peripheral actuators  143 , such as by approximately 60° or any other desirable angle. The user may then push or pull the telescopic handle members to adjust the width of the handle portion  110 . Once the preferred width has been set, the user may then return the peripheral actuators  143  to the original position to engage the width locking mechanism. 
       FIG.  3    is a cross-sectional view of the handle actuator  140  of  FIG.  2    in a rest position. The handle actuator  140  includes a central actuator  141 , upper cable connect sliders  144 A, lower cable connect sliders  144 B, upper spring  145 A, lower spring  145 B, handle height latch wires  146 A and handle fold wires  146 B. 
     To unlock the handle height latch such that the height of the handle is adjustable, a user may rotate the central actuator  141  which in turn pushes the upper cable connect sliders  144 A towards each other, compressing the upper spring  145 A. The movement of the upper cable sliders  144 A pulls the handle height latch wires  146 A, which in turn pull latch pins out of their housing to allow the height of the handle to be adjusted. Moving the central actuator  141  back to the original position allows the upper spring  145 A to move the upper cable sliders  144 A apart and release the handle height latch wires  146 A. 
     To unlock the handle fold latch such that the handle may be folded, a user may rotate the peripheral actuators, which in turn pushes the lower cable connect sliders  144 B towards each other, compressing the lower spring  145 B. The movement of the lower cable sliders  144 B pulls the handle fold latch wires  146 B, which in turn pull latch pins out of their housing to allow the handle to fold. Moving the peripheral actuators back to their original position allows the lower spring  145 B to move the lower cable sliders  144 B apart and release the handle fold latch wires  146 B. 
       FIG.  4    is a cross-sectional view of a handle adjustment mechanism of the pram frame  100  of  FIG.  1   . The adjustment mechanism depicted in  FIG.  4    may be used in the handle height adjustment and the handle fold mechanism. The wire  146 A,  146 B passes through an internal end of a latch pin  147 , around a cable wheel  148  and has a fixed end. The wire  146 A,  146 B passes through the latch pin  147  at an angle such that, when the wire  146 A,  146 B is pulled, the latch pin  147  is pulled out of an aperture such that the mechanism is unlocked. A spring  147 A biases the latch pin  147  into the aperture to lock the mechanism. 
       FIGS.  5  and  6    are perspective views of the handle portion  110  of the pram frame of  FIG.  1    in an extended configuration and a collapsed configuration respectively. The handle portion  110  includes upper telescopic members  111  and lower telescopic members  112 . To adjust the height of the handle portion  110  between a maximum height position, as shown in  FIG.  5   , and a minimum height position, as shown in  FIG.  6   , the upper telescopic members  111  are telescopically received within the lower telescopic members  112 . The handle portion  110  includes latch pins  113 A releasably positionable within one of a plurality of apertures  113 B to secure the handle portion at the preferred height. The handle portion  110  may include four or more apertures  113 B and therefore be securable in four or more height positions. The actuation of the latch pins  113 A is discussed with reference to  FIG.  4   . 
       FIG.  7    is a cross-sectional view of a handle joint of the pram frame  100  of  FIG.  1   . The right half of the Figure is discussed with reference to  FIG.  4   . Additionally, when the wire  146 A,  146 B is pulled, a slider  149 A is pulled left in the orientation shown in  FIG.  4   . The slider  149 A pushes an unlock lever  149 B, which in turn rotates a latch lever  149 C to unlock the side joint to fold or collapse the frame  100 . 
       FIG.  8    is a perspective view of the pram frame  100  of  FIG.  1    in a folded configuration. When compared to the arrangement shown in  FIG.  1   , the handle section  110 , the front wheel section  120  and the rear wheel section  150  have been rotated about the side hinges  130  such that they are adjacent to each other. As discussed previously, the handle section  110  has also been set to the minimum height setting. The collapsed arrangement may be particularly suitable when transporting the frame  100 . 
       FIG.  9    is a cross-sectional view of a width adjustment mechanism of the handle portion  110  shown in  FIGS.  5  and  6   . The mechanism includes peripheral actuators  143 , as shown in  FIG.  2   , upper handle tube  114  with a foam cover  114 A, a handle width retainer  115 , a width fixing latch  116 , a flexible locking pin  116 A attached to the fixing latch  116 , a width lock activator  117  and a spring  118 . When the peripheral actuators  143  are rotated to unlock the mechanism, the width lock activator  117  is urged by the spring  118  away from the flexible locking pin  116 A such that the flexible locking pin  116 A is unlocked and the width may be adjusted. When the preferred width has been set, the peripheral actuators  143  may be rotated back to their original position such that the width lock actuator  117  moves and pushes the fixing latch  116  to engage the locking pin  116 A within an aperture in the retainer  115  to lock the width adjustment of the handle. 
       FIG.  10    is an exploded view of a side joint mechanism  130  of the pram frame  100  of  FIG.  1   , and  FIGS.  11  and  12    are schematic side views of the side joint  130  mechanism of  FIG.  10    in an extended and folded configuration respectively. The side joints  130  include members belonging to the handle portion  110 , the front wheel portion  120  and the rear wheel portion  150 . The side joint  130  includes a linkage plate  131 , a lock pin  132 , a first fixed point  133 , a second fixed point  134 , a side joint width linked tube hinge  135  and a seat mount  136 . The first fixed point  133  is fixed to the handle portion  110 . The second fixed point  134  is fixed between inner and outer plates of the rear wheel section  150 . When the handle portion  110  is folded down, the first fixed point  133  is driven to rotate, causing the upper end of the linkage plate  131  to rotate clockwise. The linkage plate  131  is fixed to the front leg portion  120 . Accordingly, when the linkage plate  131  rotates clockwise, a groove in the lower end groove of the linkage plate  131 , which is fixed to the rear wheel portion  150 , is driven to rotate. The second fixed point  134  therefore rotates clockwise. In this way, the handle portion  110  rotates clockwise to fold, and the front wheel portion  120  and the rear wheel portion  150  rotate clockwise in equal proportions. As such, a linkage is created between the wheel portions  120 ,  150 . 
       FIG.  13    is a perspective view of the pram frame  100  of  FIG.  1    with a seat structure  200  attached to the frame  100 . The seat  200  includes a backrest member  210 , a bumper bar  220 , a footrest  230  and a seat joint  240 . The seat  200  is configured to attach to the frame  100  via the seat joint  240  arrangement, which attaches to the frame  100  adjacent to the side joints  130  of the frame  100 . The backrest  210  is adjustable in angle about the seat joint  240  and includes a backrest unlock handle  211  which is discussed in more detail with reference to  FIGS.  30  to  32   . Folding the backrest unlock handle  211  pulls internal wires to unlock the backrest  210 , in a similar manner to that described with reference to  FIGS.  3  and  4   . The backrest unlock handle  211  includes a second lock configured to limit rotation or folding of the backrest unlock handle  211  to approximately 45°, as described in more detail with reference to  FIG.  32   . The backrest  210  unlock mechanism is described with reference to  FIG.  15   . 
       FIG.  14    is a perspective view of the pram frame  100  and seat structure  200  of  FIG.  13    in a folded configuration. The folding of the pram frame  100  is as discussed with reference to  FIG.  8   . Prior to the frame  100  being folded, each member of the seat structure  200  is folded down forwards or rearwards such that they lie adjacent to the front or rear wheel section respectively. As such, the seat structure  200  and frame may fold down into a position preferable for travel or storage. The frame  100  includes an auto lock member  180  attached to the rear wheel portion and configured to snap over and retain the handle portion next to the rear wheel portion such that the frame  100  is held in the collapsed arrangement. 
       FIG.  15    is an exploded view of a backrest  210  angle adjustment mechanism of the seat  200  of  FIG.  13    and  FIG.  16    is a cross-sectional view of a bumper bar joint mechanism of the seat structure  200  of  FIG.  13   . The mechanism includes the seat attachment joint  212 , a seat unlock button  212 A, a seat latch  213 , a backrest joint  214 , a backrest adjustment drive gear  215 A, a backrest adjustment push gear  215 B, a seat linked gear  215 C, a bumper bar support joint  216 , a seat lock gear  217 A, a backrest lock gear  217 B and a seat joint inner  218 . An internal surface of the backrest joint  214  includes gear teeth arranged to interlock and engage with one or more gears of the seat linked gear  215 C, shown as the left gear in  FIG.  16   . The right gear in  FIG.  16    is arranged to move the bumper bar  216  when rotated. The left and right seat linked gears  215 C are equal in size and number of teeth. Accordingly, a 1:1 ratio is provided between the two seat linked gears  215 C. Accordingly, a rotation applied by a user to the backrest  210  or the bumper bar  220  will also be equally applied to the other of the backrest  210  and the bumper bar  220  via the seat linked gears  215 C. For example, if a user were to rotate the backrest  210 , represented by backrest joint portion  214 , clockwise 10° from the orientation shown in  FIG.  16   , the teeth on the backrest  210  housing will be rotated by 10°. The teeth on the backrest  210  housing will engage and rotate the left gear  215 C which will in turn apply an equal rotation to the right gear  215 C, causing the bumper bar to be rotated clockwise by 10°, matching the rotation of the backrest  210 . 
     When the backrest unlock handle  211  is folded, the internal wire is pulled which in turn pulls the backrest adjustment drive gear  215 A to actuate it. This moves the backrest adjustment drive gear  215 A out of the slots in the bumper bar support joint  216  and the seat joint inner  218  to allow for the backrest to be adjusted. When the backrest joint  214  is folded forwards or backwards, the seat linked gears  215 C drive the bumper bar support joint  216  such that the bumper bar is moved forwards and backwards by an angle equal to that of the backrest bar. Accordingly, the bumper bar will follow the backrest bar as the backrest bar is adjusted. 
       FIG.  15    also shows the seat joint folding mechanism. When the seat is to be folded, the backrest adjustment drive gear  215 A pushes the backrest adjustment push gear  215 B to the left, in the orientation shown in  FIG.  15   , under the action of the inclined plane. Furthermore, the backrest adjustment push gear  215 B pushes the seat lock gear  217 A and the backrest lock gear  217 B. Accordingly, the seat lock gear  217 A and the backrest lock gear  217 B disengage from locking teeth on the rear surface of the seat attachment joint  212 , such that the seat attachment joint  212  is unlocked and can rotate freely. 
       FIG.  17    is an exploded view of a seat detachment mechanism of the seat structure  200  of  FIG.  13   . To remove the seat from the frame, a user may press down the seat unlock latch  212 A and push the latch  213  to unlock the seat so that the user may then lift and remove the seat from the frame. 
       FIG.  18    is a perspective view of the pram frame  100  of  FIG.  1    with the rear wheels  152  and rear axle  153  detached. The rear wheels  152  are removed as a pair along with the connecting axle  153 . A relatively large set of rear wheels  152  are shown in  FIG.  18   . The rear wheel section  150  separates between the rear wheels  152  and the telescopic cross member  151 . In this way, the cross member  151  may provide stability to the rear wheel section  150  whilst the rear wheels  152  are changed. The rear wheels  152  and axle  153  may be removed and the rear cross member  151  telescopically shortened or lengthened whilst adjusting the width of the frame  100 . Relatively large wheels  152  may provide a more comfortable ride than relatively smaller wheels. Relatively smaller replacement wheels may be provided, such as a set of wheels equivalent in size to the wheels of the front wheel section  120 . 
       FIG.  19    is a cross-sectional view of the rear leg cross member  151  width adjustment mechanism. The cross member  151  includes a central tube  151 A that is telescopically received within two outer tubes  151 B, or vice versa. Two tube retainers  151 C are provided between the central tube  151 A and the outer tubes  151 B. The tube retainers  151 C include latch buttons  151 D operable to remove a latch pin  151 E from locking holes  151 F. At least two locking holes  151 F are provided and receive the latch pins  151 E to secure the cross member  151  in one of at least two width arrangements. 
       FIG.  20    is a perspective view of a front leg cross member  121  width adjustment mechanism. The cross member  121  includes a central tube  121 A that is telescopically received within two outer tubes  121 B, or vice versa. The cross member  121  also includes two unlock knobs  121 C rotatable by a user to unlock the locking mechanism, such that the user may push or pull the cross member  121  to a different length, before rotating the unlock knobs  121 C back into their original positions to lock the cross member  121  at the desired length. 
       FIG.  21    is an exploded view of a front wheel of the pram frame  100  of  FIG.  1   . Each front wheel arrangement includes a front leg upper housing  122 A, a front wheel lower housing  122 B, a front wheel lock plate  123 , a front wheel detachable button  124 , a front wheel housing insert  125 , a front wheel direction locker  126 , a front wheel housing bottom cover  127 , a front wheel direction lock base  128  and a front wheel direction lock pin  129 . A user may press the front wheel direction lock  126  to drive the front wheel direction lock base  128  and the front wheel direction lock pin  129 , so that the lock pin  129  can move up and down and fall into a front positioning hole of the front wheel lower housing  122 B and lock the front wheel in a forward facing arrangement. To remove the front wheel, a user may press the front wheel detachable button  124  and let the wheel lock plate  123  exit a groove in a central post of the front wheel lower housing  122 B, such that the front wheel may be removed. The front wheel may be provided with a suspension system as described herein. 
       FIG.  22    is an exploded view of a rear wheel of the pram frame  100  of  FIG.  1   . The rear wheel arrangement includes a rear wheel  152 , a brake paddle  154 , a brake paddle stopper  155 , a brake drive gear  156 , a rear wheel lock plate  157 , a rear wheel detach button  158 , a rear wheel housing cover  159 , a brake pin  161  and a rear wheel housing  162 . The brake paddle  154 , the brake paddle stopper  155  and the brake drive gear  156  are provided in combination. When the brake paddle  154  is turned to abut the brake paddle stopper  155 , the rotation of the lock plate  157  drives the housing  162  to move to the right, in the orientation shown, and fall into a brake tooth of the wheel  152  and prevent rotation of the wheel  152 . The other rear wheel (not shown) may include a drive gear and housing arranged to be actuated and lockable via the brake paddle  154 . An internal wire is provided to link the two housings  162  such that the left wheel brake is engaged when the right wheel brake is engaged. The arrangement shown in  FIG.  22    may be the comfort rear wheel group. The compact rear wheel group may have the same, or different, braking mechanism. 
       FIG.  23    is a perspective view of the pram frame  100  of  FIG.  1    with an infant carrier module  300  attached thereto. The infant carrier module  300  is suitable for carrying an infant and may be, for example, a car seat structure. The infant carrier module  300  includes a shell portion  310  providing a seat structure, and a carrier handle  320  attached to the shell portion. The infant carrier module  300  may attach to the frame  100  at points adjacent to the attachment points of the carrier handle  320  of the infant carrier module  300 , for stability. The infant carrier module  300  may attach to the wheeled frame  100  between the locking side hinges  130 , without the need for additional adapters. The infant carrier module  300  may attach to the seat  200  via the bumper bar  220  attachment housing. Accordingly, the infant carrier module  300  may be attached to the frame  100  via the seat  200 , as discussed herein. The angle at which the infant carrier module  300  is supported by the frame  100  may be adjustable. An adjustable canopy  400  is also provided. 
       FIG.  24    is an exploded view of the pram frame  100  with the seat structure  200  of  FIG.  13   . The frame  100  is arranged in the relatively wide comfort arrangement. As such, the frame  100  may be too wide to accept the seat  200  directly thereon. Accordingly, the system may comprise adapters  500 , discussed with reference to  FIG.  25   . The adapters  500  connect at one end to the frame  100  and at the other end to the seat  200 , to bridge the gap between the seat  200  and the frame  100 .  FIG.  25    is a perspective view of an attachment adapter  500 . The adapter  500  includes an infant carrier male docking member  501 , a lock button  502 , a swivel joint  503 , a swivel latch  504 , a detach button  505 , a latch  506  and an attachment joint  507 . The adapter  500  is configurable in three arrangements. The first arrangement shown in  FIG.  25   , a second arrangement in which the male docking member  501  is folded over forwards 90°about the swivel joint  503 , and a third arrangement similar to the second arrangement save for the attachment joint  507  being rotated through 180°. In  FIG.  24   , the adapter  500  is shown in the third arrangement and may be used to attach the seat  200  to the frame  100 .  FIG.  26    is an exploded view of the pram frame  100  with the infant carrier module  300  of  FIG.  23   . The seat  200  and the canopy  400  are not shown, for clarity. The adapter  500  is shown in the first configuration and may be used to attach the infant carrier module  300  to the frame  100 . 
       FIG.  27    is a rear perspective view of the pram frame  100  with the seat structure  200  of  FIG.  13   . The frame  100  includes a basket  600  attached below the seat structure  200 . The basket  600  includes a zip  601  releasable to increase the width of the basket  600 . The zip  601  gathers excess material when the frame  100  is arranged in the relative narrow compact arrangement, and the excess material is used to widen the basket  600  when the frame  100  is arranged in the relatively wide comfort arrangement. 
       FIGS.  28  and  29    are first and second cross-sectional views of a memory lock mechanism  700  respectively. The memory lock mechanism  700  includes a bumper bar male portion  701 , a memory lock button  702 , a memory lock stopper  703 , a spring  704  and an infant carrier docking female portion (not shown). A user may press the memory lock button  702  which may cause the memory lock stopper  703  to rotate under the action of the inclined plane until the memory lock stopper  703  falls into the card slot and the memory lock button  702  is locked inside the bumper bar male portion  701 . When the infant carrier docking female portion is removed, the memory lock stopper  703  rotates until the memory lock button  702  comes out of the memory lock stopper  703  card slot, unlocking the memory lock button  702 . The memory lock may be provided on each side of the frame  100 . As such, to remove a seat or infant carrier module, a user may press the memory lock button on one side of the frame  100 , use one hand to hold the seat or infant carrier module and use the other hand to unlock the other memory lock button before lifting the seat or infant carrier module from the frame. The memory lock mechanism  700  may be time dependent such that, should the second memory lock button not be actuated within a predetermined time of the first memory lock button  702  being actuated, the first memory lock may be relocked to secure the infant carrier module. Accordingly, accidental or unintentional actuation of a single memory lock button  702  may be corrected or rectified automatically. 
       FIGS.  30 ,  31  and  32    are perspective views of the backrest unlock handle  211  shown in  FIG.  13    in first, second and third arrangements respectively. The backrest unlock handle  211  includes a clamp portion  211 A attached to the backrest  210 . The clamp portion  211 A covers an opening in the backrest  210  tube through which the wires or associated components pass to allow the backrest adjustment handle  211  to release the locking mechanism and allow the backrest to recline, as discussed herein. 
     The backrest unlock handle  211  includes a paddle  211 B extending away from the clamp section  211 A which may be rotated about the clamp section  211 A, as shown in  FIGS.  30  and  31   , to unlock the mechanism. Furthermore, the backrest unlock handle  211  includes a second lock  211 C positioned on the paddle  211 B. When the paddle  211 B is rotated from the position shown in  FIG.  30    to the position shown in  FIG.  31   , to pull the internal wires and unlock the adjustment of the backrest  210 , the second lock  211 C abuts the clamp section  211 A, as shown in  FIG.  31   , and prevents further rotation of the paddle  211 B. 
     Rotation of the backrest unlock handle  211  through approximately 45° from the position shown in  FIG.  30    into the position shown in  FIG.  31    allows linked adjustment of the backrest  210  and the bumper bar  220  such that the angle between the backrest  210  and the bumper bar  220  is maintained. As such, the associated gears remain engaged. 
     The second lock  211 C may be pressed by a user such that the paddle  211 B may be rotated further, beyond the position shown in  FIG.  31   , into the position shown in  FIG.  32   . Rotating the paddle  211 B into the position shown in  FIG.  32    pulls the wires further to disengage the gears linking the backrest  210  and the bumper bar  220 . Rotation of the backrest unlock handle  211  through approximately 90° from the position shown in  FIG.  30    into the position shown in  FIG.  32    therefore allows adjustment of the backrest  210  independently of the bumper bar  220  such that the angle between the backrest  210  and the bumper bar  220  is adjustable. As such, the associated gears are disengaged. 
       FIGS.  33  and  34    are perspective views of the seat structure  200  shown in  FIG.  13    with the backrest  210  and bumper bar  220  in first and second orientations respectively. As discussed with reference to  FIGS.  30  and  31    the backrest unlock handle  211  may be moved into the position shown in  FIG.  31    to allow linked adjustment of the backrest  210  and the bumper bar  220 . The seat  200  may be arranged in various positions, including those shown in  FIGS.  33  and  34    and additional positions, such as between those shown in 
       FIGS.  33 ,  34  and  35   . The arrangement shown in  FIG.  33    is a relatively upright arrangement, and the seat  200  in this arrangement may allow an infant to sit upright. The arrangement shown in  FIG.  34    is a relatively flat arrangement, and the seat  200  in this arrangement may allow an infant to recline. The foot rest  230  remains stationary whilst the bumper bar  220  and the backrest  210  are moved. 
       FIG.  35    is a perspective view of the seat structure  200  shown in  FIG.  13    in a collapsed orientation. The backrest  210 , bumper bar  220  and foot rest  230  have been rotated about the seat joint  240  such that they lie adjacent to each other. In this arrangement, the seat  200  has a relatively small volume and may be more easily stored or transported, when not in use.