KR950008978Y1 - Ink jet head ckeaning device - Google Patents

Abstract

No content.

Description

Head cleaning device for ink jet printer

1 is a side view showing a part of the conventional apparatus cut away.

2 is an operating state of the conventional apparatus.

Figure 3 is an exploded perspective view of the device of the present invention.

4 is a plan view of the coupled state of FIG.

5 is a cross-sectional view taken along the line A-A of FIG.

Figure 6 a-c is an operating state of the device of the present invention.

* Explanation of symbols for main parts of the drawings

15: rail screw 15a: recessed groove

16: head 17: carrier

18a: engaging projection 19: power transmission gear

22, 24: driven gear 23: cam

26: sliding member 29: cleaner

30: louver 31a: external sponge

32: insertion hole 34: protrusion

35: pin 36: limit switch

The present invention relates to a head cleaning device of an ink jet printer for ejecting and printing ink, and more specifically, to prevent the ink from spreading on the document due to contamination of the head surface after printing. It is to be done.

In general, an ink jet printer is a printer that prints by ejecting ink. When not in use for a long time, the ink jet printer prevents the ink nozzles from clogging due to evaporation and solidification of the ink in the head. The installation of a head cleaning device for wiping off any ink is required.

The conventional head cleaning apparatus has a shape as shown in FIGS. 1 and 2, and the concave portion 3a is provided on one side of the head 1 in which a plurality of nozzles 1a for ejecting the ink 2 are formed. The elastic body 3 is fixed to the inside of the cap 4, the inlet portion 3a and the suction pump 5 formed in the elastic body is connected by a tube 6, the cap 4 is shown in FIG. As shown in the figure, the solenoid 7 and the lever 8 are connected to each other so that the lever 8 is elastically installed by the tension spring 9 or driven by a separate cam.

Accordingly, when power is applied to the solenoid 7 and pulls the lever 8 as shown in FIG. 2A, the cap 4 moves to the head 1 side while tensioning the tension spring 9 so that the head surface and the elastic body 3 are removed. When the suction pump 5 is operated at the same time as the () is connected, the ink 2 stuck to the head surface is removed through the concave portion 3a and the tube 6.

However, such a conventional apparatus removes the ink 2 stuck to the head surface as shown in b of FIG. 2, and then, when the head 1 and the cap 4 are separated, the ink 2 remains on the head surface. In many cases, the originals are contaminated at the time of printing, and in order to move the cap 4, a separate driving source such as a solenoid 7 is necessary, and a suction pump 5 for sucking ink is provided. There is a problem that can not be miniaturized because it is necessary.

The present invention has been made to solve such a problem in the prior art, the purpose is to remove the ink on the head surface and at the same time to wipe it.

Another object of the present invention is to miniaturize the printer by not using a separate drive source or suction pump.

According to an embodiment of the present invention for achieving the above object, the control means for controlling the movement of the carriage, the head is fixed, the power transmission means installed to one side of the control means for transmitting power by the carriage, and the power transmission A head cleaning apparatus of an ink jet printer comprising a cam rotated by a means, a cleaning means for cleaning a head while performing a straightening movement by the cam, and a switching means for controlling driving of the cam for rotating the cleaning means. do.

Hereinafter, with reference to Figures 3 to 6 of the accompanying drawings showing an embodiment of the present invention in more detail as follows.

FIG. 3 is an exploded perspective view of the device of the present invention, FIG. 4 is a combined state diagram of FIG. 3, and FIG. 5 is a cross-sectional view taken along line AA of FIG. 3, and the pulley gears 12 and 13 are driven by the driving of the motor 11. The carrier 17 is provided with a rail screw 15 so as to be rotated by the timing belt 14 wound around the rail 16 and the head 16 fixed to the printing head while moving along the rail screw 15 is transferred by the control means. This control means, the control means is formed with a recessed groove (15a) on one side of the rail screw 15, the carrier 17 is coupled to the plate spring (18) having the engaging projection (18a) is coupled As the engaging protrusion 18a moves along the rail screw 15 and is fitted into the recessed groove 15a, the transfer of the carrier 17 is controlled.

And one side of the control means is provided with a power transmission means for transmitting power when the carrier 17 is caught in the concave groove (15a), the transfer is controlled, the power transmission means as one side of the rail screw 15 The power transmission gear 19 is elastically installed with an elastic member such as a spring 20 so that the transfer distance is controlled by a pair of stopper pins 21 fixed to the rail screw 15, and is installed in the vicinity of the power transmission gear 19. In the driven gear 22 and the driven gear 24 in which the cam 23 is fixed, the timing belt 25 is wound so that the power transmission gear 19 is engaged by the driven gear 22 and the carrier 17 on one side. The cam 23 can be rotated accordingly.

At this time, the sliding member 26 is fixed to one side of the power transmission gear 19, that is, the surface connected to the carrier 17.

This is to reduce the frictional resistance with the carrier 17 during the rotation of the power transmission gear (19).

On the other hand, the cam 23 fixed to the shaft 27 of the driven gear 24 is formed with a curved portion 23a, a first protrusion 23b and a second protrusion 23c.

In addition, the cleaning means for removing ink on the head surface 16a while performing a linear rotational motion in accordance with the rotation of the cam 23 is cylindrical and coupled to the shaft 28a of the platen 28. On the outer circumferential surface of the silver cleaning 29, an louver 30 for removing ink and an external sponge 31a for wiping the head surface 16a are provided with a predetermined interval so that the louver 30 is connected to the internal sponge 31b. In the center, a rectangular insertion hole 32 is formed, and the cleaner 29 is elastically installed by the platen shaft 28a and the spring 33 which is an elastic member.

At this time, the outer sponge 31a for wiping the head surface 16a has a thicker thickness as the cleaner 29 moves in the rotational direction thereof. This is to wipe (16a).

In addition, a plurality of external sponges 31a may be provided so that the head surface 16a can be wiped more reliably. And the protrusion 34 is formed in one side of the cleaner 29, and the pin 35 is fixed to the platen shaft 28a, and when the protrusion 34 is not connected with the pin 35, it is attached to the cam 23. As a result, the cleaner 29 rotates, and the projection 34 is connected to the pin 35 so as to perform a linear movement in a controlled state.

On the other hand, in order to control the driving of the cam 23 for rotating the cleaning means, a switching means is installed below the cap 23, the limit switch 36 is installed as a switching means, so that the cap 23 is rotated once. Accordingly, the operation of the motor 11 that is pressed by the first protrusion 23b of the cam 23 to rotate the rail screw 15 is stopped.

In the figure, reference numeral 37 denotes a motor for driving the platen 28, and 38 a power transmission gear.

Referring to the effect of the present invention configured as described above are as follows.

First, the head 16 fixed to the carrier 17 by the forward and reverse rotation of the motor 11 is a linear reciprocating motion along the rail screw 15, which is a spring 18 fixed to the carrier 17 This is because the engaging projection 18a of () is fitted into the groove of the rail screw 15.

Accordingly, the head 16 prints on the original as in the conventional printer while performing a linear reciprocating motion within the range of the platen 28.

Then, as ink flows out of the surface of the head 16, that is, the head surface 16a as the document is printed in several lines, the motor 11 is transferred to the left side of FIG. 4 by a separate driving circuit. ) Continues to turn forward.

As a result, the coupling protrusion 18a moves away from the groove of the rail screw 15 and is inserted into the recessed groove 15a to control the transfer of the carrier 17. In the state in which the transfer of the carrier 17 is controlled, the head surface 16a is controlled. ) And the louver 30 of the cleaner 29 are aligned with each other.

Thus, when the carrier 17 is conveyed to the left in the drawing and the engaging projection 18a is fitted into the recessed groove 15a, one side of the carrier 17 is fixed to the power transmission gear 19 and the sliding member 26 Since it is conveyed while being connected, the power transmission gear 19 is conveyed in the same direction as the conveying direction of the carrier 17 while compressing the spring 20 so as to be engaged with the driven gear 22 on which the timing belt 25 is wound.

Accordingly, as the rail screw 15 is rotated counterclockwise by the motor 11, the rotational force is applied to the driven gear 24 having the cam 23 fixed through the driven gear 22 and the timing belt 25. As it is transmitted, the cam 23 is rotated clockwise.

As shown in a of FIG. 6, when the cam 23 rotates clockwise while the curved portion 23a and the cleaner 29 of the cam 23 are connected, the cleaner 29 is frictional with the cam 23. By rotating and by pressing at the same time by the first protrusion (23b) to compress the spring 33 is moved to the head surface 16a side, so as to b, the cleaner on the pin 35 fixed to the platen shaft 28a as b The projection 34 of 29 locks in and rotation of the cleaner 29 is controlled.

As described above, when the cam 23 continues to fire while the rotation of the cleaner 29 is stopped and the first protrusion 23b presses the cleaner 29, the cleaner 29 compresses the spring 33. Since the louver 30 is compressed to the head surface 16a by being moved to the head surface 16a, air in the louver 30 is sucked out to adsorb ink deposited on the head surface 16a.

Thereafter, the first protrusion 23b of the cam 23 is moved out, and the cleaner 29 is moved to the cam side by the restoring force of the spring 33 so that the protrusion 34 is displaced from the pin 35. Since it rotates counterclockwise by friction with 23, the cleaner 29 continues to be rotated by the cam 23 while the external sponge 31a wipes the head surface 16a as shown in c. When a plurality of external sponges 31a are installed at a predetermined interval, the plurality of external sponges are sequentially wiped off the head surface 16a, thereby maintaining a clean state of the head surface 16a more reliably.

As such, after the cleaner 29 removes and cleans the ink by the cam 23, the first protrusion 23b operates the limit switch 36 installed below the cam 23. By rotating the motor (11) for driving the rail screw 15 is reversed.

Accordingly, when the engaging projection 18a of the carrier 17 exits the recessed groove 15a of the rail screw 15, the spring 17 is compressed by the carrier 17 to transfer power to the driven gear 22. Since the power transmission gear 19 moves to the right in the drawing to block power transmission and stop the rotation of the cam 23, the head 16 is transferred along the rail screw 15 to continuously print on the original. will be.

As described above, the device of the present invention transfers the power of the motor 11 for transferring the head 16 to the cam 23 by the power control means, so that the ink remaining on the head surface 16a while the cleaner 29 rotates. Because it is to clean the need for a separate drive source can be miniaturized printer, as well as having the effect of maintaining a clean printing state.

Claims (9)

Control means for controlling the movement of the carrier 17, the head 16 is fixed, power transmission means for transmitting power by the carriage is provided on one side, and the cam rotated by the power transmission means (23), a cleaning means for cleaning the head (16) while performing a linear rotational motion by said cam, and a head cleaning device for an ink jet printer comprising a switching means for controlling driving of a cam for rotating said cleaning means. The method of claim 1, wherein the control means is formed in the concave groove (15a) on one side of the rail screw 15, the carrier 17 is fixed to the leaf spring (18) formed with the engaging projection (18a) engaging projection (18a) The head cleaning apparatus of the ink jet printer, wherein the conveyance of the carrier 17 can be controlled as the groove is inserted into the recessed groove 15a. According to claim 1, The power transmission means elastically installs the power transmission gear 19 on one side of the rail screw 15, and the driven gear 22 is installed in the vicinity thereof, the driven gear The timing belt 25 is connected between the 22 and the driven gear 24 to which the cam 23 is fixed so that the power transmission gear 19 is engaged with the driven gear 22 by the carrier 17. A head cleaning device of an ink jet printer, in which 23 can be rotated. The head cleaning apparatus of claim 3, wherein the sliding member (26) is fixed to one side of the power transmission gear (19). The cleaning means according to claim 1, wherein the cleaning means is provided with the louver 30 and the external sponge 31a at the cleaner 29 to be maintained at a predetermined interval, and the louver 30 is connected to the inner sponge 31b and has a rectangular shape at the center thereof. The head cleaning device of the ink jet printer is formed so that the platen shaft (28a) is elastically coupled by the elastic member. The projection (34) of claim 5, wherein the projection (34) is fixed to one side of the cleaner (29), and the pin (35) is fixed to the Freighten shaft (28a) so that when the cleaner (29) is rotated by the cam (23). The head cleaning apparatus of the ink jet printer, in which the cleaner 29 is linearly moved when 34 is caught by the pin 35. 6. The head cleaning apparatus of claim 5, wherein the external sponge (31a) is formed to be thick so as to go in the rotational direction of the cleaner (29). 8. The head cleaning apparatus according to claim 5 or 7, wherein a plurality of external sponges (31a) are used. The head cleaning apparatus of claim 1, wherein the switching means is a limit switch (36) so that the cam (23) is rotated by one rotation so that the rotation of the rail screw (15) can be reversed.