Foldable cart frame
OwnerZhihua Huanginventor
Life of this patent
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Abstract
The present invention discloses a foldable cart frame, comprising a front frame mechanism, a rear frame mechanism, a collapsing mechanism, a foldable upper connection frame, and a foldable lower support frame; when the front frame mechanism and the rear frame mechanism are pushed to collapse or expand, the foldable upper connection frame and the foldable lower support frame rotate to fold or unfold accordingly, an upper end of the collapsing mechanism slides along the foldable upper connection frame, a lower end of the collapsing mechanism slides along the front frame mechanism and the rear frame mechanism to collapse or expand, thereby completing the collapsing and expanding of the entire cart frame.
Claims10
A foldable cart frame, comprising a front frame mechanism, a rear frame mechanism, two collapsing mechanisms, two foldable upper connection frames, and a foldable lower support frame;
- wherein the front frame mechanism is symmetrically provided with first upper connecting members at an upper end, a rear end of each of the first upper connecting members is rotatably provided with one of the foldable upper connection frames;
- the front frame mechanism is symmetrically provided with two first lower connecting members at a lower end, front ends of the foldable lower support frame are rotatably connected to the two first lower connecting members, respectively;
- the rear frame mechanism is symmetrically provided with second upper connecting members at an upper end, front end of each of the second upper connecting members is rotatably connected to a corresponding foldable upper connection frame;
- the rear frame mechanism is symmetrically provided with two second lower connecting members at a lower end, rear ends of the foldable lower support frame are rotatably connected to the two second lower connecting members, respectively;
- one of the collapsing mechanisms is provided on each of the two foldable upper connection frames, and each collapsing mechanisms is slidably connected to a respective foldable upper connection frame;
- lower ends of the collapsing mechanisms are slidably connected to the front frame mechanism and the rear frame mechanism, respectively, such that when the front frame mechanism and the rear frame mechanism are pushed to collapse or expand, the foldable upper connection frame and the foldable lower support frame rotate to fold or unfold accordingly, upper ends of the collapsing mechanisms slide along the foldable upper connection frames, and the lower ends of the collapsing mechanisms slide along the front frame mechanism and the rear frame mechanism to collapse or expand, thereby completing collapsing and expanding of the entire cart frame;
- wherein the first lower connecting members are provided with caster wheel assemblies at lower ends, and the rear frame mechanism is provided with a rear wheel assembly below.
Dependencies are inferred from the claim text.