Land vehicles – Wheeled – Extensible
Patent
1996-06-13
1998-09-22
Orerleitner, Robert J.
Land vehicles
Wheeled
Extensible
280648, 403 62, 403 93, B62B 100, B62B 300
Patent
active
058103821
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a grip bar for coupling a pair of push rods of a collapsible baby carriage with each other. The grip bar has a central portion being rendered foldable, which enters a linear state in an open state of the baby carriage and enters a folded state in a closed state of the baby carriage, and more particularly, it relates to a grip bar for a baby carriage comprising a mechanism for locking the linear state and the folded state.
BACKGROUND INFORMATION
A typical example of a collapsible baby carriage, there is an article of a form comprises a pair of push rods so that the space between these push rods that are kept relatively wide apart in an open state of the baby carriage while these push rods are moved toward or approaching each other in a closed state of the baby carriage. Between such a pair of push rods, a grip bar is generally coupled. In the collapsible baby carriage of the aforementioned form, a central portion of this grip bar must be rendered foldable, for example, in order to allow the spacing between the pair of push rods to be charged while folding the baby carriage. The grip bar enters a linear state in an open state of the baby carriage, while the same enters a folded state in a closed state of the baby carriage.
In the collapsible baby carriage of the aforementioned form, an operation of locking both the linear state and the folded state of the grip bar is performed to make it possible to more strongly maintain the open state and the closed state. Such a locking mechanism is described in Japanese Utility Model Laying-Open No. 1-171772, for example.
In this prior art, a grip bar comprises a first portion forming one end portion, a second portion forming another end portion, and a joint which couples the first and second portions respectively while rotatably supporting the first and second portions about first and second rotary shafts which are parallel to each other respectively. In order to provide such a grip bar with a locking function, open state locking concave portions and closed state locking concave portions are formed on respective single side surfaces of the first and second portions extending in directions intersecting with axial directions of the first and second rotary shafts respectively. Further, locking members which are movable in the axial directions of the first and second rotary shafts are provided. These locking members are engaged in the open state locking concave portions respectively by movements thereof when the grip bar is in the linear state, and engaged in the closed state locking concave portions respectively by movements thereof when the grip bar is in the folded state. The locking members are urged by springs in directions to be engaged in the open state locking concave portions and the closed state locking concave portions. Further, an unlocking member is provided in order to supply an operating force for disengaging the locking members from the open state locking concave portions and the closed state locking concave portions against the elasticity or urging force of these springs.
According to such prior art, it is possible to fix the linear state and the folded state of the grip bar by engaging the locking members in the open state locking concave portions in the open state of the baby carriage and in the closed state locking concave portions in the closed state of the baby carriage, whereby the respective ones of the open state and the closed state of the baby carriage can be more strongly maintained.
While the unlocking member must be operated when the locking is to be released, the locking members can be automatically engaged in either of the open state locking concave portions and the open state locking concave portions by actions of the springs at the time of actuating a locked state.
In the aforementioned conventional grip bar, however, it can occur that the locking members may be first engaged in the open state locking concave portion of the first portion while not being engaged in the open state lo
REFERENCES:
patent: 4216974 (1980-08-01), Kassai
patent: 4506907 (1985-03-01), Miyagi
patent: 4614454 (1986-09-01), Kassai
patent: 4619542 (1986-10-01), Kassai
patent: 4846494 (1989-07-01), Kassai
Aprica Kassai Kabushikikaisha
Fasse W. F.
Fasse W. G.
Lipka Pamela J.
Orerleitner Robert J.
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