Abstract: Convertible strollers having connecting mechanisms for joining single strollers to each other.

Abstract: A system and method are provided for detachably mounting different types of infant carriers on a support structure. The system includes a mounting platform provided on a frame of the support structure. The mounting platform includes a first and second coupling structure. The first coupling structure is adapted to engage with a first fastener structure of a first infant carrier, whereas the second coupling structure is adapted to engage with a second fastener structure of a second infant carrier. The mounting platform also includes a rotary support base that can be rotated relative to the frame between a first position and a second position. In the first position, the support lo base enables engagement of the first coupling structure with the first fastener structure. In the second position, the support structure enables engagement of the second coupling structure with the second fastener structure.

Abstract: Apparatus for a perineal wash system, including a seat with a pair of pads and/or a conduit that redirects fluid from a hand-held spray nozzle to the perineal area of a person on the seat. The pads are separated and have front and rear access areas dimensioned to allow a caregiver to access the perineal area of a seated person. In one embodiment one pad is movable sideways. The frame supporting the seat is spaced a sufficient distance from the gap between the pads to not impede access to the perineum. In one embodiment a perineal washer is supported adjacent the seat. The washer receives a nozzle of a hose sprayer and redirects the fluid spray through a movable elongated conduit to direct a spray of liquid upward to the perineum. In one embodiment a commode pot below the seat has a gap sufficient to avoid pinching dangling body parts.

Abstract: An apparatus for transporting a child safety seat includes a wheeled assembly that may be clamped to the child safety seat. The wheeled assembly includes a plate member having a longitudinal axis on either side of which are formed one or more through holes. Clamping can be achieved by the use of threaded fasteners which pass through the through holes and are secured to a clamping mechanism that helps frictionally secure the plate member to the child safety seat. Suitable clamping mechanisms for this purpose may include a strap that passes through a passageway formed in the rear of the child safety seat, a clamping bracket having laterally extending arms that abut clampingly abut openings formed in the back of the child safety seat, and an structural elbow member integrally connected to the child safety seat against which a clamping force may be applied. The apparatus with attached child safety seat may be wheeled on the ground by a person using one hand.

Abstract: A stroller includes at least one adapter, by which a first child seat is configured to be detachably connected to the stroller. The stroller further includes at least one connecting piece, by which a second child seat is configured to be detachably connected to the stroller. The at least one adapter is movable from at least a first position, in which the first child seat is configured to be detachably connected to the adapter, to at least a second position connected to the stroller, in which the second child seat is configured to be detachably connected to the connecting piece.

Abstract: A secondary lock device for a one-hand fold mechanism on a child's stroller is pivotally mounted next to the actuator of the one-hand fold mechanism. The secondary lock device is positioned for convenient access by a finger of the operator to provide an intuitively operable secondary lock device cooperable with the one-hand fold actuator. The secondary lock device is spring-loaded by a torsion spring mounted on the rotational axis of the adjacent cam member forming part of the one-hand fold mechanism. The pivoted lock member includes an outwardly projecting member that engages a corresponding niche in the actuator when in a locking position. The outwardly projecting member rides along a cam surface on the actuator when the actuator is being operated, while the biasing spring returns the outwardly projecting member into the niche when the actuator reaches the home position.

Abstract: A human powered multi-functional pet cart for transporting pets or animals. This invented cart is particularly beneficial for pets with health problems, but may be used with any pet. A riding bed, which is 1 to 12 inches above ground, enables easy entrance and exit for animals with mobility problems. An accessory station with an extension bar permits a variety of pet accessories to be carried over the riding bed. Pet accessories can be carried which address comfort, standard necessities, or special pet needs. The use of a detachable front wheel assembly allows the cart to fit into a small vehicle for remote use. Padded floors and sidewall windows are designed make the riding more enjoyable for the pet.

Abstract: A stroller with a braking mechanism that automatically configures itself in a braking position provides protection against the unattended stroller from rolling away. By applying force to a handle, the braking mechanism is released and the stroller is able to be pushed as usual. The handle and braking mechanism are biased in the braking position by a spring located near the rear wheels. The braking mechanism applies sufficient frictional force against the tire of the wheel to prevent the wheel from rolling.

Abstract: A foldable stroller has a frame assembly reconfigurable between an in-use configuration and a folded configuration. The frame assembly has a left and a right frame side and each frame side includes an elongate bottom part having a front end and a back end. Each bottom part is oriented extending generally from a front to a back of the frame assembly. A fold latch is on the frame assembly and has two latch parts pivotally coupled to one another. A push arm has a lower end connected to one of the latch parts and extends upward and rearward to a handle. A front leg has a lower end pivotally coupled to a front end of the bottom part and extends upward and rearward to an upper end connected to the other of the latch parts. A support strut has an upper end pivotally coupled to the fold latch at a pivot axis and has a lower end pivotally coupled to the bottom part forward of the back end at a pivot connection. The pivot connection of the support strut in one example is positioned further forward than the pivot axis.

Abstract: A pushchair for restraining, supporting and transporting a child comprises a ground-engaging frame to support a seat for a child. The frame includes a plurality of ground-engaging wheels to facilitate movement of the frame and one or more handles to allow a carer to control movement of the frame. The seat includes first and second seating components mounted on the frame to define a seat base and a seat back. Each seating component includes a closed frame over which a flexible membrane is stretched to define a support surface.

Abstract: The assembly comprises a chassis and a child seat being detachably connectable to the chassis. The child seat is provided with at least one first connecting element, which is detachably connectable to a second connecting element provided in the chassis. The connecting elements are provided with a locking mechanism for interlocking the connecting elements. The locking mechanism can be unlocked for subsequently disconnecting the connecting elements from each other. The locking mechanism can be locked in a blocking position, in which position the locking mechanism is unlocked.

Abstract: A first and second stroller portions are described to form a modular stroller. The first and second stroller portions may be reversibly coupled together in a tandem relationship with a coupling device to operate in a double stroller configuration. Alternatively, the first and second stroller portions may be uncoupled from one another and used in an independent mode of operation.

Abstract: A collapsible supporting structure (eg the framework of a stroller) comprises a central mounting body (15) having rotatable disc (41). In the supporting arrangement (depicted) front leg (20) extends from the front surface of disc (41) and rear legs (18-19) extend rearwardly from the rear surface of disc (41). When folding the structure for transportation, rotation of disc (41) by approximately 180 ° brings all three legs (18-20) into an upwardly splayed position. Individual pivoting of legs (18-20) will then bring them into approximate coextension with arms (35-36). Disc (41) in use is locked against rotation, however twisting of a lock on top of body (15) allows pivotal convergence of arms (35-36). The movement of arms (35-36) presses on captive balls that in turn displace radial plungers so they lie within the periphery of disc (41), allowing its rotation.

Abstract: A coupler is used with umbrella strollers having tubular frames and four wheel assemblies. The coupler connects two unfolded strollers in a side-by-side position with a sufficient distance between them to prevent any contact between the wheel assemblies of the strollers. The coupler contains a receptacle having a set of three resilient C-shaped clips extending outwardly from each side wall for connecting the coupler to the strollers.

Abstract: A carrier basket has a bracket body, a pair of front basket-holding rods, a pair of positioning elements, and a rear basket-holding rod. The pair of front basket-holding rods is connected to both sides of the stroller frame, respectively. Each of the pair of positioning elements has a connecting portion for connecting with rear end of the front basket-holding rods, a pivotal portion for connecting with the rear basket-holding rod, and a pair of snap edges for holding the rear basket-holding rod in a first position. When the rear basket-holding rod is rotated in a direction against the snap edges, the snap edges can be pressed to open wider, thereby releasing the rear basket-holding rod from the first position and opening the rear end of the bracket.

Abstract: A folding seat comprising a base and a back hinged thereto, in which the base comprises an open topped container defining an inner storage space, in which in a first arrangement the back is folded onto the base, and a closed container is formed, and in which in a second arrangement the back is unfolded from the base and a seating or lying platform is formed.

Abstract: A foldable baby stroller, comprising simplified rods assembly for expanding and folding via linkage, includes a front supporter, a linking rod and a rear supporter, wherein the front supporter pivots to the rear supporter. One end of the front supporter connects to a sliding sleeve for driving by the handle bar, and the linking rod is pivotally connected between the handle bar and the rear supporter. Via the simple linkage, the sliding sleeve slides down and further driving the linking rod for rotation, in which the rear supporter is drawn close to the front supporter to be in a folded state. The simplified structure of the stroller has the effect of easy assembly and smoothly operation.

Abstract: A stroller has a stroller frame with a child seat positioned on the stroller frame. The stroller further includes a child barrier that can be coupled to the stroller frame forward of a seat bight of the child seat. The child barrier also includes a cup holder with a central longitudinal axis. When the child barrier moves relative to the stroller frame, the cup holder pivots about the central longitudinal axis.

Abstract: A three-wheel foldable stroller includes two handles, two rear legs, two front legs, and a front linking device. A lower end of each handle and an upper end of one of the front legs are releasably locked by a locking member. Each rear leg includes an upper end pivotably connected to the lower end of one of the handles and includes a lower end to which a rear wheel is attached. The front linking device includes a front-wheel base to which a front wheel is attached and includes two tubes respectively on two sides of the front-wheel base. Each tube includes an upper end connected to the lower end of one of the front legs and includes a lower end pivotably connected to the front-wheel base. The front legs and the tubes are pivotable inward or outward relative to the front-wheel base when the locking members are unlocked.

Abstract: A device is for locking and unlocking the folded and unfolded positions of an infant pushchair. During the folding and unfolding operations the handlebar being slid on the front legs, the device being actuated by means of a rope and having a lock at each side. The lock has a housing having an open lower portion and housing the active element, a flat being slidably fifed to each of the lateral faces of the housing, the flats being connected together at an end at which they are actuated by the rope. Each of the flats in its central region having an oblique slot, a pin extending through the active element being in a position to be shifted along the oblique slots, the active element being transversally shifted in the empty space of the housing when the flats are made to carry out a longitudinally shifting motion and thus bringing about the locking and unlocking with respect to the locking points being provided on the front legs.

Abstract: A foldable chassis for baby carriages is provided which includes a base frame formed by two frontally converging side members disposed at their front portions linked in a pin-jointed connection to a front support, and two inclined arms disposed at their lower ends respectively linked in a pin-jointed connection to the front portion of the side members Each of the two branches of the handlebar slidably fits onto the arms. The front portion of the branches of the handlebar is respectively connected with the rear portion of the base side members by two crossed links. The branches of the handlebar are telescopically fitted to the two inclined arms and the handlebar branches is pin-jointedly linked to the rear region of the side members by a respective strut. The struts are connected with each other with components that are fit to lock the unfolded position of the chassis.

Abstract: A body frame (10) for a wheelchair includes a main frame (11), a back frame (12) and a seat frame (13). The body frame (10) includes hinge structures (31), (38), (53) and (56) for causing the user of a wheelchair to lie down, and cross braces (15) and (16) for implementing the fold of the wheelchair. The hinge structures (31), (38), (53) and (56) are provided so that the main frame (11) and the seat frame (13) are divided in a longitudinal direction. The center of each of the hinge structures (31), (38), (53) and (56) is present on an identical virtual axis in a transverse direction. The cross braces (15) and (16) are disposed before each of the hinge structures (31), (38), (53) and (56).

Abstract: An interactive stroller for educating a child comprises of a stroller, a tray attached to the stroller, a player housed within the tray, and a controller attached within the handle of the stroller. The player might be interactive or a passive player, e.g., a CD player. The controller might be attached by either radio frequency or a wired connection to the player.

Abstract: A changing table that is secured to most types of conventional baby carriages. The changing table is deployed from a fixed position on the baby carriage to take into account the proper weight, size and space requirements necessary to change a small child. When the changing table is not in use, it may be retracted and ultimately stowed into the baby carriage in an unobtrusive position. In this manner, the changing table becomes a useful, mobile alternative to those people who typically must seek out a safe, clean and adequate surface to change their small children.

Abstract: A semi-rigid transparent shield for a jogging stroller provides occupant protection from wind, rain and snow. The device quickly and easily attaches to, and detaches from a jogging stroller. The semi-rigid transparent shield does not crease or wrinkle, maintaining excellent visibility for stroller occupant. The shield also provides protection from air borne road debris caused by passing vehicles. The shield pivots for easy loading and unloading the jogging stroller. The shield is under compression to add resistance to external forces. A sheet assembly attaches to a frame assembly forming a geometric arch adding stability and resistance to external forces. A method to provide protection of a child in a jogging stroller by shielding the child with a material that does not wrinkle or crease is also contemplated. The occupant space is substantially sealed from the outdoor elements.

Abstract: A detachable wheelchair for the disabled people is provided. The wheelchair is composed of a seat, a right wheel frame, and a left wheel frame. The seat is composed of a seat frame and a seat cushion. Two hollow shafts and one fixing nut are installed on the left-hand and right-hand side of the seat frame respectively. Two positioning shafts and one fixing bolt are arranged on the right and left wheel frame respectively. The positioning shafts on the wheel frames can be inserted into the hollow shafts on the seat frame, and the bolts can be screwed into the nuts. After the left and right wheel frames are fixed firmly onto the seat frame, they are assembled into a wheelchair.

Abstract: A stroller assembly has a frame assembly with a front and a back. The stroller assembly also has a handle coupled to the frame assembly and positioned near the back of the frame assembly. The handle has a central section between a pair of side sections and the side sections extending further rearward than the central section relative to the back of the frame assembly.

Abstract: A stroller comprises a collapsible frame, which frame at least comprises a first frame part provided with at least one front wheel, a second frame part provided with at least one rear wheel, which second frame part is pivotally connected on a side remote from the rear wheel to a side of the first frame part remote from the front wheel via a first pivot axis, and a third frame part provided with a handle.

Abstract: A stroller has a frame structure with opposed and spaced apart frame sides. Each frame side has a front leg that terminates at a lower end. A seat is supported by the frame structure between the frame sides and has a seat bottom. A front wheel assembly is connected to the lower end of each of the front legs and each front wheel assembly has a housing. An elongate foot rest extends between the frame sides of the frame structure. The foot rest is positioned at an elevation that is higher than the lower ends of the front legs and lower than the seat bottom. The foot rest is not connected to the front legs at the elevation of the foot rest.

Abstract: A foldable wagon assembly movable between an open position and a folded position. A first hinge attaches the center and front sections and a second hinge attaches the center and rear sections. The front wheels are mounted beneath the front section and the rear wheels are mounted beneath the rear section. The distance from the lower surface of the bed to the points of contact of the front and rear wheels is equal to the center section width to establish the folded position (FIG. 9) with the front section and the rear section parallel to one another. The assembly is conveniently and easily convertible between an open position and a folded position making it promptly ready for use, transport, or storage and eliminates transportation and storage problems.

Abstract: A baby carriage includes: a pair of front legs; a pair of connecting members; a pair of guide sleeves respectively fixed to intermediate regions of the pair of front legs; a pair of rear legs having their upper ends pivotally connected to the pair of connecting members, respectively; a pair of push bars slidably held by the pair of connecting members and the pair of guide sleeves, respectively; width-direction connecting means for connecting for connecting the pair of front legs, the pair of rear legs, and respective lower ends of the pair of push bars so that a distance between the pair of front legs, a distance between the pair of rear legs, and a distance between the respective lower ends of the pair of push bars can be reduced; and a handle member having an inverted U-shape for connecting respective upper ends of the pair of push bars to each other.

Abstract: The purpose of this invention is to enhance the stability of seat up-down adjustment and the aesthetics of a wheelchair. The mechanism is structured by the cart frame, the seat, the linking rod mechanism and the linear motion actuator. There are at least two linking rod mechanisms, each mechanism is composed of several connecting frames and pivot-linked with each others and remains two distal ends for connecting to the cart frame and the seat. The linear motion actuator connects the cart frame and the seat, moves the seat up and down smoothly with help from the stable supporting of the linking rod mechanism. The whole adjustment mechanism is confined in between the seat and the cart frame, which minimizes the needed space and makes a nice figure.

Abstract: A convertible dual stroller and methods therefor is provided for seating at least two children side-by-side when fully expanded, a single child when partially expanded and partially collapsed, and which is fully collapsible for storage. A secondary stroller portion is fixedly secured with a primary stroller portion and the secondary stroller portion may be collapsed when the convertible dual stroller is partially expanded and partially collapsed to seat one child while the primary stroller portion supports and transports the secondary stroller portion while the secondary stroller portion is collapsed.

Abstract: A stroller 10 includes a body structure 10a and a child car set 40 capable of detachably mounted on the body structure 10a. The body structure 10a has a handle 15 having a pair of straight parts 15a and a shape resembling the inverted letter U. Armrest bars 16 have base parts respectively connected to the straight parts 15a of the handle 15. Connecting members 17 are attached respectively to front end parts of the armrest bars 16. A support frame 28 for supporting the child car set 40 is extended between the connecting members 17. End caps 29 are detachably put on opposite end parts of the support frame 28, respectively. Brackets 32 for supporting front side parts 40a of the child car set 40 thereon are provided to the straight parts 15a of the handle 15. Each of the brackets 32 has at least two steps 32a and 32a formed respectively at different levels.

Abstract: This children's carriage (1) comprises a frame (10) that supports a seat or the like for the child, equipped with a rear bar for pushing the carriage. The frame is equipped, at the front with a warning light controlled by means of a control switch provided on the push bar in order to limit the risks of collisions between the children's carriage and vehicles traveling in proximity thereto such as automobiles. In order to confer a good-looking aesthetic appearance to children's carriage, particularly at the warning light, the frame is equipped with a front wheel (18), which is supported on the ground and joined to the frame by a fork (22?) that is articulated with regard to the frame, an external housing (26) of the light (24) forming, at least in part, a decorative element in the area of the articulation of the fork with regard to the frame.

Abstract: A device for limiting swivel of a wheel of a stroller includes a fork mounted with the wheel, a swivel-limiting unit, and a quick release unit. The swivel-limiting unit includes a connecting seat adapted to be disposed fixedly on a frame unit of the stroller, a limiting seat connected fixedly to the fork, and a control member disposed on the connecting seat and operable to extend into the limiting seat so as to prevent rotation of the fork relative to the connecting seat. The quick release unit includes a base disposed fixedly on the connecting seat, and a movable member disposed movably on the base and operable to move on the base so as to allow for removal of the fork from the swivel-limiting unit.

Abstract: A stroller includes a stroller frame, a basket frame including a pair of arms mounted to the stroller frame and a rear cross member extending between the pair of arms, a latch mount coupled to the rear cross member, a basket mounted to pivot relative to the basket frame, and a latch coupled to the basket to releasably engage the latch mount, thereby allowing the basket to move between a closed position and an open position relative to the basket frame.

Abstract: The invention relates to a swivel wheel (10) with suspension (14), comprising a wheel frame (11), a wheel element (12) able to turn about a horizontal wheel axle (13), a suspension (14) and an arm (15). At one end the arm (15) is attached to the wheel frame (11) such that it can pivot about a horizontal arm axis (17) and at the other end it supports the wheel axle (13) some distance away from the arm axis (17). The suspension (14) engages on the arm (15) at an arm engagement point (18) and on the wheel frame (11) at a frame engagement point (19). The arm engagement point (18) and the frame engagement point (19) define a straight suspension axis (20) running through these points. The wheel furthermore has an adjustment mechanism (30) that is equipped for setting the distance (D) from the suspension axis (20) to the arm axis (17) by moving the arm engagement point (18) and/or the frame engagement point (19) along an adjustment track (31).

Abstract: A mechanism for switching the wheels of baby stroller between a fixed-direction mode and a free steering mode by a far-end controller drives a positioning member through a connecting member. The positioning member is used to catch and fix the wheel seat of the stroller into the fixed-direction mode, and is also capable of releasing the wheel seat back into the freeing steering mode. The far-end controller enables a user to shift the mode of steering without bending down, and eliminates the need to suspend the front wheel while steering the baby stroller, in order to change direction.

Abstract: An infant stroller that can propel itself under its own power, or in other circumstances provide propulsion assistance to aid the stroller attendant so as to reduce the required effort to push a stroller over various types of terrain. The stroller having a base frame formed of a plurality of connected substantially rigid formed tubular or molded plastic members, the frame adapted to fold for storage. Provided on the frame and interfacing with the ground are a plurality of wheels of which at least one wheel is an electrically driven wheel. The stroller includes two handle arms secured to the rear portion of the frame with a handle grip bar secured to an upper portion of the arms. The handle grip has a battery compartment for receiving a rechargeable battery pack therein. The stroller includes an electrically powered drive means for providing power assist to drive one or more driven wheels over sometimes hilly, grassy or rough terrain.

Abstract: A children's wagon includes a body supported by wheels and having an interior. Panels are pivotally attached to the wagon body and are positioned within the interior of the wagon. At least one such panel has a second panel pivotally attached to it. The panels may be moved between generally upright and horizontal positions so that the wagon features multiple interior configurations.

Abstract: A transporter with integral media entertainment and education center for a baby. The transporter with integral media entertainment and education center includes a stroller with a hood and a handle, a DVD player, speakers, a controller, and a power source interface. The DVD player replaceably depends from the hood of the stroller and is viewed by the baby lying on the back in the stroller to entertain and educate the baby. The speakers are in electrical communication with the DVD player, are at the stroller, and are listened to by the baby lying in the stroller. The controller is at the handle of the stroller and is in electrical communication with, and controls, the DVD player. The power source interface is at the stroller, is in electrical communication with the DVD player, and electrically communicates with a power source to power the DVD player.

Abstract: An entertainment console is provided on a stroller, where the console securely holds a DVD player or other type of audio/video/media player. The console has a cavity that holds the DVD play. A release mechanism, such as a spring-biased release may be used to “pop” the DVD player out of the cavity. When the console is secured in the cavity, a hinged door can be closed over the DVD player to protect the DVD player. When the hinged door is opened, the DVD player screen can be opened as well for viewing. The DVD player screen is thus between the opened hinged door and the child. The console also has a sliding door or other protective element that slides over the DVD player controls when the DVD is in use.

Abstract: A stroller wheel has a wheel rim, a wheel hub, and a suspension system integrated between the wheel rim and the wheel hub. The integrated or modular suspension system permits resilient movement of the wheel hub and the wheel rim relative to one another during normal stroller usage. A stroller can include a stroller frame and one or more of the suspended wheels coupled to the stroller frame for rotation about an axis.

Abstract: A walking stabilizer equipped to combat the effects of akinesia paradoxica by employing a novel method and device to regulate and actuate a projection instrument which generates a pattern perpendicular to the user's direction of travel. The regulating and actuating device comprises a two pole series switch circuit configuration in tandem with the walking stabilizer's novel dual action braking mechanism. The projection device is only operable when the user concurrently selects its use and when the walker stabilizer is free for movement or in contact with the patient.

Abstract: A three wheeled baby stroller is provided with a single steerable rear wheel. The stroller preferably has the three wheels positioned to form an equilateral triangle, resulting in a highly maneuverable stroller. The stroller has a minimized turning swath and is easily steered. The stroller has a simple and relatively lightweight design. The seat for the infant is positioned relatively low to the ground to increase stability.

Abstract: A first and second stroller portions are described to form a modular stroller. The first and second stroller portions may be reversibly coupled together in a tandem relationship with a means for coupling to operate in a double stroller configuration. Alternatively, the first and second stroller portions may be uncoupled from one another and used in an independent mode of operation.

Abstract: A frame with telescopic closure particularly for pushchairs or the like, comprising two front posts and two rear posts that are connected in a downward region to respective wheels and are kinematically connected to each other, the frame being provided in an upward region with two handle posts that can move with respect to the front posts and the rear posts in order to pass from an extended active position to a retracted folding position, the frame further comprising two upper auxiliary posts, each of which is connected rigidly to a respective handle post and has at least one engagement portion for a corresponding lateral covering wing that is connected to a corresponding side of the back of a seat that is supported by the frame.

Abstract: A stroller frame including a wheeled support, a lower support joint, an upper support, and a connecting joint that commonly form a foldable linkage system. The wheeled support has a pair of push bars and an actuator associated with a flexible element, so as to control the rotation of each push bar. When the end of the push bar is released, the connecting joint is driven by the push bars and carries the wheeled support, the lower support joint, the upper support, which are simultaneously rotated and moved from an erect position to a collapsed position. The upper support is furnished with a connector for detachably securing a stroller seat, a safety seat, or an infant carrier. In addition, the lower support joint may extend upwardly with a plurality of extension arms for detachably securing two seats, two safety seats or an infant carrier. This provides a stroller frame having multiple uses and greater convenience.

Abstract: A folding baby carriage comprises a body so constituted that a seat and a backrest part approach each other in a folding operation, and a luggage basket positioned under the seat. The luggage basket comprises a front frame extending backward and forward under the seat, a rear frame turnably connected to a rear end of the front frame and extending backward and forward, and a lock mechanism preventing the rear frame being turned around the front frame. The rear frame is turned so as to take a lower position in which a rear part of the luggage basket is opened, a horizontal position in which it extends almost horizontally, and an upper position in which its rear end approximates the backrest part. The lock mechanism comprises horizontal position fixing means for fixing the rear frame in the horizontal position.