| 摘要 |
A device prevents ink in an ink cartridge from being supplemented more than a predetermined number of times in a printing apparatus. The device can include a head jetting stored ink on a media, an ink storing unit with rail type guides oppositely provided to both insides thereof and perpendicularly protruded, electrode terminals provided in each lower portion of both guides for sensing whether or not ink in the ink storing unit remains. A sensing actuator can be contacted to both electrode terminals while being guided by guide apertures formed in both sides thereof to move up and down. The sensing actuator can be made of a conductor, and having buoying means for moving the sensing actuator up and down along the surface of ink. The device can also include a resilient mechanism for stably moving the sensing actuator down according to a surface state of ink, a destroying mechanism provided to a lower portion of the ink storing unit and destroying the buoying means upon supplementing ink more than the predetermined number of times to discharge an air pressure, thereby preventing re-use, a sensing sensor connected to both electrode terminals and sensing whether or not the sensing actuator is contacted, a control unit receiving a sensing signal of the sensing sensor to compare the received signal with input data and informing the outside of a state of ink, and an ink cap enclosing an upper portion of the ink storing unit and having an air hole.
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