KR19990020078A - Paper Feeder Mode Switching Structure for Inkjet Printers - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeder of an inkjet printer, and more particularly, in an inkjet printer that switches modes according to the rotational direction of the handle for mode switching, when the mode is switched between sheet paper and continuous paper by adding a b-shaped mode switching bracket. Maintain a constant gap in the holder friction to feed paper smoothly Add a separate mode switching bracket to accurately maintain the left and right gaps of the friction roller to prevent skew and prevent friction during the continuous mode. Since a constant gap between the rollers is maintained, there is an effect of preventing a paper jam due to the difference of the left and right forces of the friction roller.

Description

Paper Feeder Mode Switching Structure for Inkjet Printers

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper supply apparatus of an inkjet printer, and more particularly, to a mode conversion of an inkjet printer for supplying a smooth paper by maintaining a constant gap of a holder friction during mode switching between sheet and continuous paper by adding a mode switching bracket. It relates to a structure change device.

In general, an inkjet printer heats ink stored in a head, causing an increase in pressure in the ink cartridge. Thus, at an elevated pressure, ink is ejected through the nozzle at the position where printing is to be made.

In other words, the inkjet printing by the heating method is called thermal inkjet printing.

The number of nozzles used in such an inkjet printer is generally about 64, font type can be downloaded (Down Load) by the program and printing of pictures or pictures. The resolution of fonts and pictures is usually about 300 to 1200 dpi (Dot Per Inch), and color printing can be performed depending on the type of head cartridge to be installed.

Such a general inkjet printer has a paper feeder unit 20 for supplying paper P, as shown in FIG. 1, and a conveying device for feeding and feeding paper P from the paper feeder unit 20. Section 30, a printing device section 40 for printing on the paper P conveyed by the conveying device section 30, and a paper discharge device section 60 for discharging the printed paper. .

To describe the operation according to such a structure in more detail, the paper (P) is loaded in the paper feeder unit 20, fed by the feed roller 25 to the feeder unit 30 in a single sheet conveying for printing Will be

The printing device unit 40 is a paper P conveyed from the conveying device unit 30 through the nozzle in accordance with the left and right movement of the carriage 41 mounted with the head cartridge 42 with a nozzle for ejecting ink. To be printed on.

Therefore, the paper P printed by the nozzle mounted on the head cartridge 42 is gradually moved while being printed line by line on the paper P on the base frame 50, and the printed paper P is When the paper discharge unit 60 is reached, a paper discharge operation is performed in which the paper P is discharged through the discharge roller 61 and the star wheel 62.

That is, the paper conveying process of the inkjet printer is a series of processes are finished through the paper feeder unit → the feeder unit → the printing device unit → the sheet dispensing unit unit, where the paper feed process in detail with reference to Figures 2 and 3 first It can be divided into paper mode and continuous paper mode.

First, when the handle 26, which is a mode switching lever, is rotated clockwise in the cut sheet mode of FIG. 2, the adjustment lever is moved as shown in FIG. 3, and thus the friction roller fixed to the apparatus set and the handle 26 is rotated. As the spring 34 of 32 extends, a gap is formed due to the elasticity, thereby switching to the continuous paper mode.

Accordingly, the paper passing between the friction roller 32 and the feed roller 31 having a predetermined gap is printed through the nozzle mounted on the head cartridge, and then is transported along the paper conveying path, through the discharge roller 61. Is discharged.

In addition, when the mode switching handle 26 is rotated counterclockwise (CCW) in the continuous paper mode to switch to the sheet paper mode, the friction roller spring 34 is restored, and thus, the friction roller 32 and the feed The roller 31 is in close contact.

However, the paper feeding process of such an inkjet printer is a process in which the lever for mode switching is operated, the adjustment lever is moved, and the spring of the friction roller is opened so that a gap is formed and the paper is continuously fed. If left, there is a problem that the spring is deformed due to the nature.

In addition, when the mode is switched using the mode switching handle, that is, rotation is not performed well on the left side as shown in FIG. 4, the left and right gaps of the friction roller 32 are not uniformly rotated. There is a problem in that jams or skews are generated due to a difference between left and right loads.

The present invention provides a device that can prevent the difference between the left and right rotation amount caused by the torsion generated by moving the spring friction to prevent the deformation of the spring friction, to smoothly supply the paper and to extend the life of the machine The purpose is.

In order to achieve the above object, a handle for mode switching for mode switching according to the rotational direction is fixed to the far right side of the device set by a fixed shaft. The handle boss is mounted, and the mode switching bracket is attached to the handle boss, and the mode switching bracket return spring is fixed to the case of the device at the upper end of the mode switching bracket. The spring friction is fixed to the upper side of the holder friction, which is a lever for mode switching, a slide hole for driving the mode switching bracket is formed, and the spring friction is fixed to the slide hole. The lower end of the holder friction is in close contact with the feed roller in accordance with the mode change during paper feeding There is a friction roller that additional features for maintaining a gap.

In addition, the mode switching bracket has a c-shape around the fixture and has another feature that is driven by the driving of the handle boss.

1 is an overall perspective view showing the internal structure of a general inkjet printer,

2 is a side view showing a sheet paper mode state according to FIG. 1,

3 is a side view showing a continuous paper mode state according to FIG. 1;

4 is a cross-sectional view illustrating a torsional state in a rotational direction of the handle according to FIG. 1;

5 is a side view showing the internal structure of the inkjet printer according to the present invention,

Figure 6 shows a front view according to Figure 5,

7 and 8 illustrate a sheet paper mode state according to FIG. 5,

FIG. 9 shows the continuous paper mode state according to FIG. 5;

10 shows an operating state of the handle boss according to FIG. 5.

Explanation of symbols for main symbols in the drawings

26: handle 32: feed roller

32: Friction Roller 33: Holder Friction

33a: slide hole 80: bracket for mode switching

81: spring friction 82: bracket return spring for mode switching

90: handle boss

Thus, the configuration and operation of the present invention will be described in more detail with reference to the accompanying drawings.

5 to 8 show an example in which the present invention is implemented, the mode switching handle 26 is fixed to the top right of the device set by a fixed shaft to perform mode conversion according to the rotation direction. Immediately below the handle 26, an elliptical handle boss 90 for driving a mode switching bracket is mounted.

In addition, the mode switching bracket 80, which is in close contact with the handle boss 90 and is driven in the direction of rotation of the handle boss 90, is fixed in a c-shape around the fixture, and the mode switching bracket ( At the upper end of the bracket 80, a mode return bracket return spring 82 is fixed to the case of the device.

In addition, the spring friction 81 is fixed to the end of the B-shaped mode switching bracket 80 is fixed to the middle portion of the vertical shape of the B-shaped.

In addition, a slide hole 33a for driving the mode switching bracket 80 is formed at an upper portion of the holder friction 33 that is a lever for mode switching, and a spring frick is formed in the slide hole 33a. The section 81 is fixed.

At the lower end of the holder friction 33, a friction roller 32 is attached to the feed roller 31 in close contact with the feed roller 31 or maintains a constant gap according to a mode change during paper feeding.

Referring to the operation according to this configuration, first, when the user using the machine to switch to the sheet mode in order to supply the sheet of paper, the spring friction 33 fixed to the horizontal portion of the letter B as shown in Figure 7 The upper end of the slide hole 33a formed in the holder friction 33 is caught.

Therefore, as the holder friction 33 is turned upward, the friction roller 32 and the feed roller 31 closely contact each other by the elasticity of the spring friction 81.

As described above, when the friction roller 32 and the feed roller 31 are board-converted to continuous paper in order to supply paper continuously in the close sheet mode, the handle 26, which is a lever for mode conversion, is opened. When adjusted in the direction of the arrow, the boss 90 of the handle 26, which is a lever for mode switching, rotates clockwise as shown in FIG. 10.

Thus, the mode switching bracket 80 is rotated and the holder friction 33 is rotated clockwise by moving along the slide hole 33a of the holder friction 33.

That is, as the holder friction 33 rotates in the clockwise direction, the friction roller rises upward, and thus a gap Gap is formed constantly, so that smooth paper feeding is achieved.

In addition, when the handle 26, which is a lever for mode switching, is rotated counterclockwise when the mode is switched to a single sheet, the handle boss 90 is rotated to its original position, and thus the holder frick is resilient to the bracket return spring 82 for mode switching. The section 33 is rotated so that the friction roller 32 and the feed roller 31 are in close contact with each other to convert to the sheet paper mode.

As described above, an additional mode switching bracket is added to accurately maintain the left and right gaps of the friction roller, thereby preventing the occurrence of skew.

In addition, a constant gap between the friction roller and the feed roller is maintained in the continuous mode, thereby preventing a paper jam due to the difference in the left and right forces of the friction roller.

Claims (4)

In an inkjet printer for mode switching according to the rotation direction of the mode switching handle, A paper feeder mode switching structure of an inkjet printer, characterized in that a B-shaped mode switching bracket is added. The method of claim 1, And a mode return bracket return spring is fixed to the case at a vertical portion of the b-shaped mode switching bracket. The method of claim 1, And a holder friction spring is attached to the horizontal portion of the b-shaped mode switching bracket. The method of claim 1, And the b-shaped mode switching bracket is driven by a handle boss mounted at the bottom of the handle.