Chairs and seats – Collapsible chair; i.e. – relatively folding bottom – back,... – Laterally collapsible
Patent
1985-06-12
1987-03-10
Dorner, Kenneth J.
Chairs and seats
Collapsible chair; i.e., relatively folding bottom, back,...
Laterally collapsible
280 4741, 297 27, 297376, B62B 708, A47C 1027
Patent
active
046486518
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a collapsible support, for example a collapsible baby carriage such as a lie-back push chair, provided with armrests.
BACKGROUND ART
The specification of European Pat. No. 0 000 437 discloses a collapsible support, in the form of a lie-back push chair, comprising a rear frame having two upper corners and two lower corners; a base frame having two front corners and two rear corners pivotally connected, respectively, to the two lower corners of the rear frame; two upper brace members respectively pivoted, at their upper ends, to the upper corners of the rear frame; two lower brace members respectively pivoted, at their lower ends, to the front corners of the rear frame; two knuckle joints respectively connecting the two upper brace members to the lower brace members so as to prevent folding of the rear frame towards the base frame when the support is extended with the upper brace members respectively extending substantially colinearly with the lower brace members, but to allow the knuckle joints to move, respectively, towards the rear corners of the base frame; two seat support members having rear ends pivotally connected, respectively, at or adjacent the rear corners of the base frame and having front ends respectively supported by the two lower brace members; and two backrest members having lower ends respectively pivoted to the seat support members.
DISCLOSURE OF THE INVENTION
It is intended, by means of the present invention, to provide a collapsible support with armrests which are not only collapsible with the remainder of the structure, but which also serve to carry out functions normally carried out by other components, thus (to this extent) simplifying the structure.
This is achieved by providing two armrest members having rear ends pivotally connected to the rear frame at positions respectively above the rear ends of the two seat support members and having front ends which project beyond the lower brace members when the support is extended; two links having upper and lower ends respectively pivoted to the armrest members and the seat support members so that each link, and the seat support and armrest members to which the link is pivoted, form part of a parallelogram linkage; two connector members respectively slidable along the armrest members and respectively slidable along the backrest members so as to vary the inclination of the backrest members when the support is extended; and locking means for locking the connector members respectively so as to support the backrest members in at least one position.
The armrest members are therefore capable of being folded so as to lie alongside the rear support members, by virtue of the parallelogram linkages of which they form parts. In addition, compact connector members, with their locking means, co-operate with the armrest members and the backrest members to provide support for the backrest members.
In a preferred embodiment of the invention the armrest members are respectively provided with hooks which, when the support is in its extended condition, respectively engage the lower brace members so as to provide lateral support for the armrest members. The two links extending between the seat support members and the armrest members are therefore relieved of lateral mechanical loading and serve to complete parallelogram linkages for controlling folding of the armrest members with the remainder of the structure. The links can therefore be provided in the form of relatively lightweight members.
The rear frame can be provided in a form such that, when the structure is in its extended condition, there is a space through which the backrest members can swing during variation in the inclination of the backrest members. The rear frame may also include means for supporting the backrest members when they are in their fully inclined position.
The rear and base frames may both be rigid structures, for example: rectangular in shape, so that collapsibility is effected merely by hinged movement of the rear and base fram
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Andrews MacLaren Limited
Brown Peter R.
Dorner Kenneth J.
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