| 摘要 |
An arrangement for supporting, inclining, and reclining a rear section of a folding bed frame structure of a sofa bed includes a rear bed section; an intermediate bed section pivotally connected to the rear bed section; a slide link extending between and pivotally connected at opposite ends thereof to the rear bed section and to the intermediate bed section; a ratchet element pivotally connected to the slide link and including a notch for engaging the intermediate bed section and supporting the rear bed section when inclined at a first inclination relative to the intermediate bed section; and a cam surface located on the ratchet element that causes the ratchet element to automatically disengage from the intermediate bed member for reclining of the rear bed section relative to the intermediate bed section when the rear bed section is inclined at a second inclination greater than the first inclination. The rear bed section can be raised to the greater inclination either by directly raising the rear bed section or by raising the intermediate section when simply performing the method of folding the bed frame structure into the sofa bed.
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