KR100437161B1 - Feeding roller supporter for ink-jet printer - Google Patents

Abstract

The feeding roller support apparatus of the inkjet printer according to the present invention includes: a bushing respectively provided on the first and second fixing pieces of the main chassis so as to receive and support both ends of the feeding roller; A spring installed on the side of the driving gear mounting position of the feeding roller to fix the axial position when the feeding roller rotates; And support means for supporting the feeding roller at a side opposite to the spring installation position of the feeding roller in order to prevent the feeding roller from swinging due to the thrust during rotation of the feeding roller. The support means may include: a first support member inserted into an end of the feeding roller and having an outer surface of a cone structure; And a second support member which is in point contact with the first support member. At this time, the second supporting member is assembled to the wall of the maintenance mounted between the second and third fixing pieces of the main chassis in a screwed manner is configured to adjust the degree of appearance. According to the present invention, since the support point of the feeding roller is increased by the addition of the support means as described above to support the end of the feeding roller, the axial shaking is prevented when the feeding roller rotates, and thus, the swing of the feeding roller It is possible to prevent the print media from being broken, so that a print result of a desired resolution can be obtained in a high quality printer.

Description

Feeding roller support device of inkjet printer {FEEDING ROLLER SUPPORTER FOR INK-JET PRINTER}

The present invention relates to an inkjet printer, and more particularly, to a feeding roller support device for an inkjet printer rotatably supporting a feeding roller for conveying printing paper.

In an inkjet printer, a feeding roller transfers, for example, printing paper loaded on a paper feed tray to an image forming unit inside the printer. The feeding roller is rotated by receiving power from a separate driving source when the printer is being driven. At this time, if an axial shake occurs, printing failure occurs and a printing result of a desired resolution cannot be obtained, so the feeding roller can be rotated. The so-called feeding roller support device, which is supported in this way, needs to be designed and configured in view of this point. In addition, as the resolution of the inkjet printer is recently increased, even the small shaking during the rotation of the feeding roller may adversely affect the resolution of the printing result, so the design of the feeding roller support device should be very important.

1 and 2 are diagrams schematically showing a feeding roller support apparatus of a general inkjet printer, wherein reference numeral 10 denotes a main chassis, 20 a feeding roller, and 30 a maintenance.

1 and 2, the main chassis 10 is provided with first to third fixing pieces 11, 12 and 13, and the first and second fixing pieces 11 and 12 are provided. ), Both ends of the feeding roller 20 are rotatably supported by the first and second bushings 21 (only one bushing of the feeding roller is shown in the drawing, but the bushing is also interposed therebetween). In addition, a maintenance 30 is mounted between the second and third fixing pieces 12 and 13.

A driving gear 22 is installed at one end of the feeding roller 20, and a spring 23 for fixing an axial position when rotating the feeding roller 20 is installed adjacent to the driving gear 22. It is.

The feeding roller 20 transfers the paper to the image forming unit inside the printer while rotating by the driving force transmitted to the driving gear 22 when driving the printer.

However, in the feeding roller support apparatus of a general inkjet printer, since both ends of the feeding roller 20 are simply supported by the main chassis 10 through the bushing 21, shaking due to thrust during rotation of the feeding roller occurs. There is a problem. Since the axial fluctuation of the feeding roller causes a printing breakage and makes high quality printing difficult, it is necessary to prevent the axial fluctuation due to the thrust during rotation of the feeding roller.

The present invention has been made in view of the above-mentioned, the axial shaking does not occur when the feeding roller is rotated to prevent the printing paper due to the shaking of the feeding roller feeding of the inkjet printer that can obtain the desired high-resolution printing results It is an object to provide a roller support device.

1 is a perspective view schematically showing a feeding roller support apparatus of a general inkjet printer,

Figure 2 is a detailed view showing the main portion of the conventional feeding roller support device shown in Figure 1,

Figure 3 is an exploded perspective view showing the main configuration of the feeding roller support apparatus of the inkjet printer according to an embodiment of the present invention,

4 is an assembled cross-sectional view of FIG. 3, and

5 is a perspective view showing a state in which the feeding roller is installed in the printer by the feeding roller support device of the present invention.

<Description of Symbols for Main Parts of Drawings>

10; main chassis 11, 12, 13; first to third fixing pieces

20; feeding roller 21; bushing

22; drive gear 23; spring

30; maintenance 40; supporting means

41,42; first and second support members

The feeding roller support device of the inkjet printer according to the present invention for achieving the above object, the bushings are provided on the first and second fixing pieces of the main chassis to accommodate and support both ends of the feeding roller; A spring installed on the side of the driving gear mounting position of the feeding roller to fix the axial position when the feeding roller rotates; And support means for supporting the feeding roller at a side opposite to the spring installation position of the feeding roller in order to prevent the feeding roller from swinging due to the thrust during rotation of the feeding roller.

The support means may include a first support member inserted into an end of the feeding roller and having an outer surface of a cone structure. At this time, the first supporting member is in point contact with the wall of the maintenance mounted between the second and third fixing pieces of the main chassis.

The support means may include a first support member inserted into an end of the feeding roller and having an outer surface of a cone structure; And a second support member which is in point contact with the first support member. At this time, the second supporting member is assembled to the wall of the maintenance mounted between the second and third fixing pieces of the main chassis in a screwed manner is configured to adjust the degree of appearance.

According to the present invention, since the support point of the feeding roller is increased by the addition of the support means as described above to support the end of the feeding roller, the axial shaking is prevented when the feeding roller rotates, and thus, the swing of the feeding roller It is possible to prevent the print media from being broken, so that a print result of a desired resolution can be obtained in a high quality printer.

The above objects and other advantages of the present invention will become more apparent by describing the preferred embodiment of the present invention in detail with reference to the accompanying drawings. For reference, in describing the embodiments of the present invention, the same reference numerals refer to the same parts as those in the related art.

3 to 5, reference numeral 10 denotes a main chassis, 20 a feeding roller, 30 a maintenance, and 40 a support means.

3 to 5, the main chassis 10 is provided with first to third fixing pieces 11, 12 and 13 spaced apart from each other at predetermined intervals. These first to third fixing pieces 11, 12, 13 may be formed by bending the corresponding portion of the main chassis 10. As shown in FIG.

Both ends of the feeding roller 20 are bushings 21 (only one side is shown in the drawing, but bushings are interposed on the first and second fixing pieces 11 and 12 of the main chassis 10, respectively). Is rotatably installed under the In addition, a driving gear 22 receiving power from a driving source (not shown) is mounted on one side of the feeding roller 20, and its axial position when the feeding roller 20 rotates adjacent to the driving gear 22. A spring 23 is provided to fix it.

The maintenance 30 is mounted between the second and third fixing pieces 12, 13 of the main chassis 10.

The support means 40 serves to support the feeding roller 20 on the opposite side of the spring 23 installation position of the feeding roller 20 in order to prevent the feeding roller from shaking due to the thrust when the feeding roller 20 rotates. do.

The support means 40 includes a first support member 41 and a second support member 42. The first support member 41 is inserted into an end of the feeding roller 20 and has an outer surface of a corn structure. The second supporting member 42 is assembled to the one side wall of the maintenance 30 by a screwing method. The first support member 41 is provided such that the cone structure of the outer surface thereof is in point contact with the second support member 42.

The support point of the feeding roller 20 is increased by the support means 40 as described above, and thus, shaking during rotation of the feeding roller can be prevented.

On the other hand, the support means 40 is not shown, but may be composed of only the first support member 41 described above. At this time, the outer circumferential surface of the cone structure of the first support member 41 is in direct point contact with one side wall of the maintenance 30, and even in this case, the support point of the feeding roller 20 is increased. The same effect as in the example can be obtained.

However, in the case of the illustrated example as described above, that is, when the first support member 41 and the second support member 42 are provided, it is more preferable not only to prevent shaking of the feeding roller but also to obtain additional effects.

For example, by adding the second support member 42, a gap can be maintained between the drive gear 22 and the bushing so that the bushing does not directly contact the bush. In other words, when the drive gear 22 and the bushing are in direct contact with each other, the additional feeding roller may be shaken due to the bending and flatness of both parts. Therefore, it is necessary to maintain a proper gap therebetween. As described above, when the second support member 42 is assembled to the wall of the maintenance 30 by a screwing method to support the first support member 41, the degree of appearance of the second support member 42 is adjusted. The above-described constant gap can be maintained, and the gap can be adjusted.

The feeding roller 20 rotatably supported on the main chassis 10 by the feeding roller support device according to the present invention configured as described above is rotated by the power transmitted through the drive gear 22 to print the paper. It is transferred to the image forming unit inside. At this time, since the feeding roller 20 is supported and rotated by the support means 40 at one vertex, the axial swing of the feeding roller can be prevented. Therefore, it is possible to prevent the printing paper from breaking due to the axial fluctuation of the feeding roller and the like, and to obtain a printing result of a desired resolution in a high quality printer.

Meanwhile, in the illustrated example, an outer surface of the first support member 41 has a cone structure, and an example in which the second support member 42 flatly contacts the same is illustrated, but is not limited thereto. 1 Any shape may be taken as long as both support members 41 and 42 are in contact with each other, such as flattening the outer circumferential surface of the support member 41 and making the second support member 42 a cone structure. Do.

In addition, in any of the above cases, since the first support member 41 and the second support member 42 are configured to make point contact, the friction force generated between the two members can be minimized, and the feeding roller Excessive loss of rotational force of 20 can be prevented.

According to the present invention as described above, since the supporting force acts in the axial direction of the feeding roller due to the addition of the support means for supporting the end of the feeding roller and the feeding roller is supported and rotated at one vertex, Axial shaking is prevented, and thus, a phenomenon in which the printing paper may be broken due to rocking of the feeding roller can be prevented, thereby obtaining a printing result of a desired resolution in a high quality printer.

While the invention has been shown and described in connection with preferred embodiments for illustrating the principles of the invention, the invention is not limited to the construction and operation as shown and described. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

Claims (3)

An apparatus for supporting a feeding roller rotatably installed on the first and second fixing pieces of the main chassis having the first to third fixing pieces spaced at a predetermined interval, Bushings respectively installed on the first and second fixing pieces so as to receive and support both ends of the feeding roller; A spring installed on the side of the driving gear mounting position of the feeding roller to fix the axial position when the feeding roller rotates; And And a support means for supporting the feeding roller at a side opposite to the spring installation position of the feeding roller to prevent the feeding roller from swinging by the thrust during the rotation of the feeding roller. The method of claim 1, wherein the support means, A first support member inserted at an end of the feeding roller and having an outer surface of a cone structure, the first support member being a wall of maintenance mounted between the second and third fixing pieces of the main chassis; Feeding roller support device for an inkjet printer, characterized in that the point in contact with. The method of claim 1, wherein the support means, A first support member inserted at an end of the feeding roller and having an outer surface of a corn structure; And And a second support member in which the first support member is in point contact. The second supporting member is assembled to the wall of the maintenance mounted between the second and third fixing pieces of the main chassis by screwing method to adjust the degree of appearance of the feeding roller support apparatus of the inkjet printer, characterized in that .