JP2003127404A - Dust prevention mechanism for ink jet printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive dust prevention mechanism which can be applied to printing heads having nozzles mounted with a high density. SOLUTION: In the dust prevention mechanism for the ink jet printer provided with the ink jet printing head having a nozzle array of a plurality of arrays for discharging ink, a member having a plurality of holes formed to the periphery of the nozzle array of the plurality of arrays, a blower for blowing the air from the plurality of holes, and a hose for linking the air from the blower to a plate having a plurality of holes, the plurality of holes are angled to mix the air blown out from adjacent holes of the plurality of holes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dustproof mechanism for office and industrial ink jet printers.

[0002]

2. Description of the Related Art FIG. 6 is an exploded perspective view showing a schematic structure of a conventional ink jet printer dustproof mechanism. Also, FIG.
10 to 10 are partial sectional views showing a schematic configuration of a conventional inkjet printer dustproof mechanism.

6 to 10, 2 is a print head having a plurality of rows of nozzles 1 for ejecting ink, 4 is a plate having a plurality of holes 3 for ejecting air, 5
Is a print head holder having a round hole 5a for a hose joint and a print head holder recess 5b which is an air flow path. Reference numeral 6 is a hose joint for connecting a hose 7 for flowing air. Reference numeral 9 is an ink droplet, 8 is a print medium, and 10 is an air curtain portion formed by air jetted from the plurality of holes 3.

In the above construction, a plurality of hoses 7 are connected to a blower (not shown), a plurality of hose joints 6 are fixed in the hose joint round holes 5a of the head holder 5, and the plurality of hoses 7 are connected. The head holder 5
The print head holder recess 5b, which is an air flow path, is formed so as to surround the nozzle 1 row of the print head 2. Further, a plate 4 having a hole 3 for ejecting air is joined to the print head holder 5 with an adhesive or the like so as to cover the print head holder recess 5b. Further, the print head 2 is provided on the side of the plate 4 facing the print head holder 5.
The air curtain 1 is formed by the air ejected from the plurality of holes 3 of the plate 4 with holes.
0 is formed to prevent dust and the like from adhering to the nozzle 1 portion of the print head 2.

[0005]

However, the plate 4 provided with the plurality of holes 3 for blowing air around the nozzle in the above-mentioned structure blows air in a curtain shape and does not attach dust to the print head. In order to do so, as shown in FIGS. 7 and 8, the pitch of the adjacent holes 3 is made as small as possible, and a large number of holes 3 are required so that the air curtain portion 10 is formed without a gap. for that reason,
The drilling process is expensive and the mechanism is expensive.

Further, as shown in FIG. 9 and FIG. 10, the air ejected from the plurality of holes 3 of the plate 4 avoids the influence of the air which prevents the ink droplet from advancing straight, particularly the air which is directed to the print head side. Ink drops 9
The positions of the nozzle 1 for ejecting the ink and the hole 3 for ejecting the air had to be spaced so that there was no influence of the air that impedes the straight movement of the ink droplet. Furthermore, there is a possibility that dust may adhere to the nozzle 1 due to the air flowing toward the nozzle 1 side. Therefore, if the dustproof mechanism needs a dead space, the size of the dustproof mechanism becomes large, or conversely, if there is a restriction in mounting the dustproof mechanism, it is necessary to reduce the number of nozzles.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a dustproof mechanism which is inexpensive and can be applied to a printhead having a high mounting density of nozzles.

[0008]

In order to achieve the above object, the present invention provides an inkjet printhead having a plurality of nozzle rows for ejecting ink, and a plurality of nozzle rows formed around the plurality of nozzle rows. A member having a hole, and
In a dustproof mechanism of an ink jet printer provided with a blower for blowing air from the plurality of holes and a hose that connects air from the blower to a plate having a plurality of holes, It is characterized in that the air blown out is angled so that the air blown out from the adjacent holes intersects with the air.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is an exploded perspective view showing a schematic configuration of an inkjet printer dustproof mechanism according to the present invention.

2 and 4 are partial sectional views from the A side in FIG. 3 and 5 are partial cross-sectional views seen from the B side in FIG. 1 to 5, the same parts as those in FIGS. 6 to 10 are designated by the same reference numerals.

The first feature of the present invention is that, as shown in FIGS. 2 and 3, of the plurality of holes 3a of the plate 4, adjacent holes 3a are formed at an angle in a direction in which adjacent holes 3a intersect with each other. Is. Therefore, even if the pitch of the adjacent holes 3a is widened, the air curtain portion 10 can be formed, and the number of the holes 3a for blowing air can be reduced.

As shown in FIGS. 4 and 5, the second feature of the present invention is that the plurality of holes 3a are blown out to the plurality of nozzles 1 of the print head 2 to the outside. It is formed with an angle. As a result, it is not necessary to reduce the number of nozzles if the dustproof mechanism, which has been a problem in the related art, becomes large, or conversely, if there are restrictions in mounting the dustproof mechanism.

With the above-described structure, it is possible to provide a dustproof mechanism which is inexpensive and can be applied to a print head having a high nozzle mounting density.

[0014]

As described above, according to the present invention, it is possible to provide a dustproof mechanism that is compatible with a print head that is inexpensive and has a high nozzle mounting density.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a schematic configuration of an inkjet printer dustproof mechanism of the present invention.

FIG. 2 is a cross-sectional view taken along the line A1-A1 viewed from the direction A in FIG.

FIG. 3 is a B1-B1 cross-sectional view as seen from the B direction in FIG.

FIG. 4 is a cross-sectional view taken along the line A2-A2 viewed from the direction A in FIG.

5 is a B2-B2 cross-sectional view as seen from the B direction in FIG. 1. FIG.

FIG. 6 is an exploded perspective view showing a schematic configuration of a conventional inkjet printer dustproof mechanism.

FIG. 7 is a cross-sectional view taken along the line A1-A1 viewed from the direction A in FIG.

FIG. 8 is a B1-B1 cross-sectional view seen from the B direction in FIG. 6;

9 is a cross-sectional view taken along the line A2-A2 viewed from the direction A in FIG.

10 is a cross-sectional view taken along the line B2-B2 viewed from the direction B in FIG.

[Explanation of symbols]

1 is a nozzle, 2 is a print head, 3a is a hole, 4 is a plate, 5 is a print head holder, 5-a is a round hole for mounting a hose joint, 5-b is a print head holder recess, 6 is a hose joint, and 7 is A hose, 8 is a print medium, 9 is an ink droplet, and 10 is an air curtain.

Claims (2)

[Claims] 1. An inkjet printhead having a plurality of rows of nozzles for ejecting ink, a member having a plurality of holes formed around the plurality of rows of nozzles, and
In a dustproof mechanism of an ink jet printer provided with a blower for blowing air from the plurality of holes and a hose that connects air from the blower to a plate having a plurality of holes, A dustproof mechanism for an inkjet printer, characterized in that the blown air is angled so that the air blown from the adjacent holes and the air intersect. 2. The dustproof mechanism for an ink jet printer according to claim 1, wherein the plurality of holes are angled so that air is blown to the outside of the nozzle row.