초록 ▼

Two side frames support a seat assembly (25, 31 and 32) for a baby. Each side frame has first and second legs (1 and 2) pivotally connected at adjacent first ends (3 and 4) and a handle shaft (11). When the push chair is erected, with the second ends (5 and 6) of the legs (1 and 2) of each side fram

Two side frames support a seat assembly (25, 31 and 32) for a baby. Each side frame has first and second legs (1 and 2) pivotally connected at adjacent first ends (3 and 4) and a handle shaft (11). When the push chair is erected, with the second ends (5 and 6) of the legs (1 and 2) of each side frame spaced apart, the handle shaft (11) of each side frame is movable between first and second positions in which a handle bar (34) transversely interconnecting the handle shafts (11) is respectively behind the seat assembly (25, 31 and 32), for pushing the baby forwards, and in front of the seat assembly (25, 31 and 32), for pushing the baby backwards. The second leg (2) and the handle shaft (11) of each side frame are also connected by drive means (16 and 17) so that further movement of the handle shaft (11) from its second position to a third position laterally adjacent the first leg (1) is accompanied by corresponding movement of the second leg (2) towards a position laterally adjacent the first leg (1).

대표청구항 ▼

1. A collapsible push chair in which two transversely connected side frames each comprise: first and second legs (1 and 2) respectively provided with adjacent first ends (3 and 4) and with second ends (5 and 6); pivot means (7 to 10) providing articulation between the adjacent first ends (3 and

1. A collapsible push chair in which two transversely connected side frames each comprise: first and second legs (1 and 2) respectively provided with adjacent first ends (3 and 4) and with second ends (5 and 6); pivot means (7 to 10) providing articulation between the adjacent first ends (3 and 4) of the first and second legs (1 and 2); and a handle shaft (11); characterised in that: the handle shaft (11) is pivotally connected to said pivot means (7 to 10) for movement between a first position, in which the handle shaft (11) extends away from the first leg (1), and a third position, laterally adjacent the first leg (1), respectively on opposite sides of a second position in which the handle shaft (11) extends away from the second leg (2); locking means (12 to 15) are provided for releasably locking the handle shaft (11) in said first and second positions; drive means (16 and 17) interconnecting the handle shaft (11) and at least one of the first and second legs (1 and 2) for relative movement of the first and second legs (1 and 2) so that when the handle shaft (11) is in said third position the first leg (1) is laterally adjacent the second leg (2); and lost motion means (18 and 19) permitting movement of the handle shaft (11) from the first position to the second position without relative movement between the first and second legs (1 and 2). 2. A collapsible push chair, according to claim 1, in which the drive means (16 and 17) of each side frame interconnect the handle shaft (11) and the second leg (2) for pivotal movement of the second leg (2) towards and into lateral proximity with the first leg (1) as the handle shaft (11) is pivotally moved from said second position to said third position. 3. A collapsible push chair, according to claim 2, in which: the pivot means of each side frame comprise a hub (7 and 8) at the first end (3) of the first leg (1) and first and second pivot pins (9 and 10) supported by said hub (7 and 8); the handle shaft (11) is pivotally mounted on the first pivot pin (9); the second leg (2) is pivotally mounted on the second pivot pin (10); the drive means comprise a first gear sector (16) pivotally mounted on the first pivot pin (9) and a second gear sector (17), which is co-operable with the first gear sector (16), at the first end of the second leg (2); and the lost motion means comprise an arcuate slot (18) formed in the first gear sector (16) and a driving pin (19) extending from the handle shaft (11) and through the arcuate slot (18) along an axis which is parallel to the axes of the first and second pivot pins (9 and 10). 4. A collapsible push chair, according to claim 1, in which the locking means of each side frame comprise: a sleeve (12) mounted for movement along the handle shaft; two spaced formations (13 and 14) on the pivot means (7 to 10); and a complementary formation (15) on the sleeve (12) which is engageable with the two spaced formations (13 and 14) when the handle shaft (11) is in its first and second positions, respectively, to thereby lock the handle shaft (11) in these positions. 5. A collapsible push chair, according to claim 1, in which: a slider (20) is mounted for movement along one of the first and second legs (1 and 2) of each frame; a locking device (21) is provided for locking the slider (20) in a support position when the side frame is extended and the handle shaft (11) is in its first position or its second position; and a seat support bar (22) extends between the first and second legs (1 and 2) and is pivotally connected to the slider (20) mounted for movement along said one of the first and second legs (1 and 2) and to the other of said first and second legs (1 and 2). 6. A collapsible push chair, according to claim 1, in which: the first and second legs (1 and 2) and the handle shaft (11) of each side frame have axes which lie in the same plane; first wheel means (23,23) are mounted on the second ends (5) of the first legs (1); second wheel means (24,24) are mounted on the second ends (6) of the second legs (2); the second leg (2) of each side frame is shorter than the first leg (1) and connected to the pivot means (7 to 10) so that, when the handle shaft (11) is in its third position and the first leg (1) is laterally adjacent the second leg (2), the second end (5) of the first leg (1) is spaced from the second end (6) of the second leg (2) and the first wheel means (23,23) clear the second wheel means (24,24); and when the handle shaft (11) of each side frame is in its third position and the first leg (1) is laterally adjacent the second leg (2), the first and second wheel means (23,23 and 24,24) are disposed transversely of the first and second legs (1 and 2) and the handle shaft (11).