Paper tray structures and electrocardiograph machines

摘要

This disclosure relates generally to medical devices, particularly to drawer-type paper tray structures for loading paper into electrocardiograph machines. A paper tray structure provided comprises a paper tray and a door component. The door component comprises a door located in front of the paper tray. The door component is connected to the paper tray movably and is configured to move repeatedly between a first position and a second position relative to the paper tray; the paper tray comprises a first restriction surface and a second restriction surface corresponding to the first and second positions respectively.

主权项

1. A paper tray structure, comprising:
a paper tray with an operation space there above; and a door component comprising a door located in front of the paper tray; wherein the door component is connected to the paper tray movably and the door component is configured to move repeatedly between a first position and a second position relative to the paper tray; the paper tray comprises a first restriction surface and a second restriction surface corresponding to the first and second positions respectively; at the first position, the door component engages with the first restriction surface and disengages with the second restriction surface, and the door component lets the operation space open; at the second position, the door component disengages with the first restriction surface and engages with the second restriction surface, and the door component blocks the operation space; wherein the door component and the paper tray cooperate with each other during their linear movement, and the door component is configured to move linearly and repeatedly between the first and second positions relative to the paper tray; wherein the door component comprises a platen roller; the platen roller is fixed to the door and suspended above the paper tray; the platen roller and the door both let the operation space open at the first position; and at least one of the platen roller and the door blocks the operation space at the second position.