Locking structure for carriage cover

A locking structure for locking a cover panel to two carriage side frames comprising:

• a mounting base fixed at bottom of the cover panel, the mounting base comprising a length from a first end to a second end across a width of the cover panel from a first side edge to a second side edge thereof;
• a gear rotatably arranged near a middle region of the mounting base;
• a first sliding plate slidably arranged on the mounting base, the first sliding plate comprising an inner opening with a side edge having a first toothed portion engaged with the gear;
• a second sliding plate slidably arranged on the mounting base, the second sliding plate comprising an inner opening with a side edge having a second toothed portion engaged with the gear, the second sliding plate being partially stacked over the first sliding plate along a vertical direction of the mounting base such that the first and second sliding plates are configured to engage with the gear at different height levels, and the second tooth portion being located near opposite edges of the mounting base;
• and
• a first latch slidably arranged at the first end of the mounting base and connected to the first sliding plate;
• and
• a second latch slidably arranged at the second end of the mounting base and connected to the second sliding plate;
• wherein the first latch and the second latch comprising a locking state where the first latch stretches out of the first end and the second latch stretches out the second end to lock the first side edge and the second side edge of the cover panel respectively to the two carriage side frames, and an unlocking state where both the first latch and the second latch are retracted back to the mounting base by linear motion in opposite directions of the first sliding plate and the second sliding plate driven simultaneously by the gear;
• wherein the mounting base comprises a guiding channel formed within the mounting base and extending along a longitudinal direction of the mounting base, the first and second sliding plates are constrained to linear movement within the guiding channel.