According to the invention there is provided a push chair frame compristng : <BR> <BR> <BR> a a pair of side sub-assemblies, each comprising<BR> <BR> <BR> <BR> 0 a hollow front log, * a rear leg pivotally connected to the front leg at respective upper points forming an invert v or short ! eg y therewith, # an inwards facing groove along at least one of the grooves and * a handle telescopically received in the front ! eg and extensible as M upwards and rearwards extension of the front leg as a single stem converting the invert v or short stem y into a full stem y, * a seat base having a pair of longitudinally-hinged-together, seat-paltform members, each pivotaDy connected to a one oFtbe legs in the respective sub-assembly and slidingly and pivotally coimected to the other ! cg in tbc sub-assembly via a slide in its groove and # collapsible mechanism for spacing the side sub-assemblies apart from each other at a spacing such that the seat platform members are arranged to provide the seat base in generally flat form; # the handles collapsing in, the seat platform hinging up, the respective front and. rear leg pivoting towards each other and the collapsible inechanism collapsing fbr folding of the push chair frame.

Preferably, the inwards facing grooves are in the rear legs and the seat- platform members are pivotally connected to the front legs and pivotally and slidingly connected to the rear legs.

Preferably, the handles arc extensible in the erected state of the frame, to selectable positions. In the preferred embodiment, the handles are generally L-shaped,

and adjustable both angularty and longihLdinally, to space grips on the feet of the Ls both apart from each other and from the ground to suit a user.

Whilst it is envisaged that the seat platform can comprise two members only, each directly pivotally connected to the legs; in the preferred embodiment, the two members arc indirectly pivotally connected via intermediate members.

The collapsible mechanism is preferably a scissors mechanism between the legs having the inwards lacing grooves, with upper connection, points being provided above the position of sliding connection of the seat base to the grooved legs and lower connection points being provided below the sliding connection ; the arrangement being such that as the frame is collapsed, the lower connection points slide down the grooves below the scat base connections.

For locking the frame in its erected position, the front-to-rear leg pivots can be provided with one locking mechanism and the scissors mechanism is provided with another.

One or both of the rear wheels are preferably provided with a brake and the front wheels are castor wheels for steering.

To help understanding of the invention, a specific embodiment thereof will now be described by way of example and with reference to the accompanying drawings, in which : Figure 1 is a side view of the a push chair irame of the invention ; Figure 2 is a back view of the irame : Figure 3 is a plan view of the framc ; Figure 4 is a perspective view of the frame.

Referring to the drawings, the collapsible frame comprises a pair of fi-ont legs 1 and a pair of rear legs 2. The front legs are hollow to receive telescopie handles 4, The bottom &ndR of the front legs are provided with castor brackets 5 and front : whcetn 6. The handles are genera) ty L shaped and provided-with an internal mechanism onerated by buttons 7 for adjusting their angular and longitudinal position.

The rear legs are connect to the front legs by single axis pivots 11 which arc ilorinally locked when the frame is erected and arc released by primary catches 12 at the top of the front legs. At their lower ends, the rear legs carry rear wheels 14, at least one of :" which is provided with a brake mechanism 15, operated by a perlai A seat platform 21 comprises outer parts 22 pivotally connected 23 to the from leg 1 and hingedly connected to inner parts 24, themselves hinged to each other. The seat parts are flat when the frame is extended for use, with the hinges 25 between being arranged to resist collapse of the platform, i. e. arranged such that they will pivot no further from a folded position to their open position. The rear ends 26 of the outer parts are pivotally connected to the slides 27 received in over-hung grooves 28 running along the inside faces of the rear legs, A collapsible scissors mechanism 31 interconnects the sides. It is pivotally connected 32 to the rear legs al the pivot that is above the extended position of <BR> <BR> <BR> <BR> the seat platform rear ends 26. In the grooves 28 and below the pivotal connection of the seat ends 26 to the slides 27, the latter have further pivotal connections 34 for the scissors mechanism. The arrangement is that as the sides 172 of the seat are coilapsed towards each other, the scissors mechanism also closes. In doing so, the rear edge of the seat platform moves down the rear legs with the scissors. Thus the frame sides move towards each other and the seat is hinged up and pivoted to lie generally parallel to the collapsed legs. At the same time, the rear legs pivot towards the front legs. A latch 35 is provided on one of the back legs to lock out such movement in the use state of the frame.

To avoid collision of the seat platform with the scissors mechanism, the back edge of the seat platform is scalloped 36.

Where the frame is to be used without a separable scat, infant carrier or carry cot attached to the platform, a seat upholstery frame 41 can be connected to the outer parts 22 of the seal platform. The upholstery frame has L-shaped side members 42, pivoted at 43 close to the pivots 11 to allow the upholstery frame to fold up. The upper limbs 44 of the Ls are connected to the front legs by upholstery - not shown.

The upper limbs are interconnected by their own scissors mechanism 45. The upholstery frame will normally be removable for replacement with another by clips - not shown in detail.

The invention is not intended to be restricted to the details of the above described embodiment, in particular : 1. To stabilise the two iront legs laterally, they can be connected together by a pair of struts pivotally connccted to the legs at a low position and pivoted to each other. The pivotal connections are such that as the legs are moved together on. folding of the frame, the struts fold up in the manner of the centra) seat members 24. To control the aiding of the struts, a support can be connected from their central pivotal point to the centra ! hinge of the seat platform. Since the platform. rises at the front and falls at the rear on folding, a point along the central hinge can be chosen, which rises at the desired rate of that of the central pivot point of the lower struts. Conveniently, the lower struts can be positioned at a height suitable to act as a ibot rest for a chiid in the seat. Alternatively, the front legs can be stabilised by a. scissors mechanism as between the rear legs.

2. To stabilise the front and rear legs in each side, a triangulation member can be added. The seat side members 22 act as triangulation members with respect to lose to the pivots and not as effective they would be if lower in the frame. The triangulation member can be a strut as in the previous paragraph, with a spring loaded sleeve passing over its pivot to keep it straight untit drawn back in the same action as releasing the latch 35 at each side. Alternatively, the strut can be fixed at differing heights in the front and rear legs and arranged to telescope on'folding or be comnected to a slide in the rear legs. Such arrangements accommodate length change on folding. Again the telescoping or sliding can be unlatched in the samc aclion as unlatching of the scissors mechanism 31.

3. To ease folding of the frame, the telescoping of the handles 4 can be arranged to effect unlatching of the pivots 11.

4. To allow an infant carrier or carry cot to be connected to the seat platform, the outer seat platform members can be provided with shafts extending axially of the members and through each cnd At the ends the shafts can be provided

with cranks, having dogs gs legs, whereby with the cranks extending up the dogs extetid in. The e dogs legs can be atranged to be at a spacing appropriate to latch to the infant earner or cajry cot. The shafts can be arranged to rotate the dogs legs into the plane of the seat platform when a seat frame such as 4) is provided. A lock can be provided for locking the dogs gs legs in position for latching of the infant camer or carry cot.