초록 ▼

An apparatus for measuring the amount of ink remaining in an ink tank using a sensing module and a detecting circuit is disclosed. The sensing module comprises a fixed device connected to the casing of the ink tank and a movable device connected to the bag. As the ink is ejected, the volume of the b

An apparatus for measuring the amount of ink remaining in an ink tank using a sensing module and a detecting circuit is disclosed. The sensing module comprises a fixed device connected to the casing of the ink tank and a movable device connected to the bag. As the ink is ejected, the volume of the bag increases so that the movable device moves along with the bag. The detecting circuit, coupled with the sensing module, generates a corresponding detecting signal according to the variation in the relative position of the movable device and the fixed device, and the measurement of the ink amount is thus obtained.

대표청구항 ▼

An apparatus for measuring the amount of ink remaining in an ink tank using a sensing module and a detecting circuit is disclosed. The sensing module comprises a fixed device connected to the casing of the ink tank and a movable device connected to the bag. As the ink is ejected, the volume of the b

An apparatus for measuring the amount of ink remaining in an ink tank using a sensing module and a detecting circuit is disclosed. The sensing module comprises a fixed device connected to the casing of the ink tank and a movable device connected to the bag. As the ink is ejected, the volume of the bag increases so that the movable device moves along with the bag. The detecting circuit, coupled with the sensing module, generates a corresponding detecting signal according to the variation in the relative position of the movable device and the fixed device, and the measurement of the ink amount is thus obtained. g to claim 7, wherein the ink fills the volume the casing and the bag. 17. The apparatus according to claim 16, wherein the bag communicated with atmosphere is used to modulate the pressure within the casing. 18. An apparatus for measuring an amount of ink remaining in an ink tank, the ink tank including a casing and a bag, wherein the bag is disposed within the casing, the apparatus comprising: a plurality of fixed devices, connected to the casing and spaced at intervals; a movable device, connected to the bag and sequentially coupled with the fixed devices as the volume of the bag changes; and a detecting circuit, coupled with the movable device and the fixed devices, and responsive to a coupling relation of the movable device and the fixed devices, for generating a detection signal indicative of a changing amount of ink in the tank. 19. The apparatus according to claim 18, wherein the detection signal is a voltage signal. 20. The apparatus according to claim 18, wherein the detection signal is a current signal. 21. The apparatus according to claim 18, wherein the fixed devices are normally open switches. 22. The apparatus according to claim 18, herein the fixed devices are normally closed switches. 23. The apparatus according to claim 18, wherein the movable device is a normally open switch. 24. The apparatus according to claim 18, wherein the movable device is a normally closed switch. 25. An apparatus for measuring an amount of ink remaining in an ink tank, the ink tank including a casing and a bag, wherein the bag is disposed within the casing, the apparatus comprising: an adjustable device, connected to the casing; a movable device, one end of which is connected to the bag and the other end of which is coupled with the adjustable device, for adjusting an interaction between the movable device and the adjustable device as the volume of the bag changes, such that an electrical property of the adjustable device varies according to the interaction between the movable device and the adjustable device; and a detecting circuit, coupled with the adjustable device, for measuring the varying electrical property and generating a detection signal having a magnitude indicative of the amount of ink remaining in the tank. 26. The apparatus according to claim 25, wherein the adjustable device is a slide-wire resistance. 27. The apparatus according to claim 25, wherein the movable device is a torsion spring. 28. The apparatus according to claim 25, wherein the detection signal is a voltage signal. 29. The apparatus according to claim 25, wherein the electrical property is a resistance value of the adjustable device. 30. The apparatus according to claim 25, wherein the detecting circuit is coupled with the adjustable device and responsive to the varying electrical property, so that any changes in the amount of ink remaining in the tank, as reflected by the variations in the electrical property, are indicated by changes in the detection signal.