KR100476969B1 - Fixing apparatus for halogen lamp fusing unit of laser printer - Google Patents

Abstract

The halogen lamp fixing device for a fuser of a laser printer according to the present invention, wherein the first and second brackets welded to both ends of the halogen lamp are fastened to the fixing frame with a fixing screw to fix the halogen lamp. One of the first and second brackets is characterized in that the shock absorbing means for absorbing the tensile and compressive stress or external shock applied to the halogen lamp and its welded joint is provided. The buffer means may be formed of a bent portion bent in a portion of the bracket, the bent portion may be formed in both the first and second brackets. According to the present invention, the first and second brackets for fixing the halogen lamp to the fixing frame, the buffer which can absorb the tensile and compressive stress or external shock due to the increase of the temperature of the halogen lamp and the temperature of the fixing frame. Since the means is provided, the halogen lamp is not broken or the welded part is disconnected due to the above tensile and compressive stress or external impact. Therefore, it is possible to prevent the occurrence of a fixing failure due to breakage and disconnection of the halogen lamp.

Description

Halogen lamp fixing device for fixing unit of laser printer {FIXING APPARATUS FOR HALOGEN LAMP FUSING UNIT OF LASER PRINTER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser printer, and more particularly, to a fixing device for fixing a halogen lamp, which is a heating source of a fixing unit for fixing an image by a toner transferred to printing paper to heat and pressure to fix the printing paper.

An electrophotographic image forming apparatus, such as a laser beam printer, develops electrostatic latent images formed on a photosensitive drum with toner to form a visible image, and then transfers and fixes the visible image by the toner on printing paper and outputs a predetermined print. do.

In this case, the fixing of the image is performed by pressing and pressing a visible image by toner transferred onto printing paper by applying heat and pressure, and a fixing unit for implementing such a fixing process includes a heating roller and a pressure roller. In addition, the fixing unit includes a halogen lamp as a heating means for heating the heating roller to a predetermined temperature.

As shown in Figs. 1A and 1B, the halogen lamp 1 is installed in the heating roller 2 in the longitudinal direction, and both ends of the first and second brackets 3 and 3 'are welded to each other. do. The first and second brackets 3 and 3 'are fastened and fixed by fixing screws 5 and 5' to the fixing frame 4.

A fuser of the above-described general laser printer is printed between a non-illustrated pressure roller in which a heating roller 2 rotated by the halogen lamp 1 is heated and in contact with the heating roller 2 at a predetermined pressure. The paper passes, whereby the image transferred to the printing paper is completely fixed to the paper. Here, the surface temperature of the heating roller 2 is raised to about 250 ℃, the halogen lamp 1 is repeated heating / cooling by the temperature control.

On the other hand, in such a general fuser, the halogen lamp 1 is repeatedly subjected to tensile and compressive stress due to its own temperature rise and elongation difference due to the temperature rise of the fixing frame 4, which causes the halogen lamp 1 And the case where the welded portions of the first and second brackets 3 and 3 'fall apart and are disconnected. In particular, when the halogen lamp 1 is subjected to tensile stress at the temperature rise, the impact from the outside makes it easier to break the halogen lamp itself and disconnect the welded part.

However, in the conventional halogen lamp fixing device, since the halogen lamp 1 is fixed to the fixing frame 4 by the first and second brackets 3 and 3 'of a simple structure, the tension as described above. In addition, breakage and disconnection problems of the halogen lamp due to compressive stress or external impact cannot be avoided, and thus deterioration of image quality is caused due to poor fixing, and improvement is required.

The present invention has been made in view of the above, and the laser printer which does not cause breakage or disconnection of the halogen lamp even under tensile and compressive stress or external impact caused by the temperature increase of the halogen lamp itself and the temperature rise of the fixing frame. It is an object of the present invention to provide a halogen lamp fixing device for a fixing unit.

Halogen lamp fixing device for a fuser of a laser printer according to the present invention for achieving the above object, the first and second brackets welded to both ends of the halogen lamp is fastened to the fixing frame by a fixing screw to fix the halogen lamp. One of the first and second brackets is characterized in that the shock absorbing means for absorbing the tensile and compressive stress or external shock applied to the halogen lamp and its welding joint portion is provided.

Here, the buffer means may be formed of a bent portion bent in a portion of the bracket.

In addition, the present invention may be provided in both the first and second brackets of the buffer means consisting of the bent portion as described above.

According to the present invention, the first and second brackets for fixing the halogen lamp to the fixing frame, the buffer which can absorb the tensile and compressive stress or external shock due to the increase of the temperature of the halogen lamp and the temperature of the fixing frame. Since the means is provided, the halogen lamp is not broken or the welded part is disconnected due to the above tensile and compressive stress or external impact. Therefore, it is possible to prevent the occurrence of a fixing failure due to breakage and disconnection of the halogen lamp.

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.

As shown in Figures 2 and 3, the halogen lamp fixing device for the fuser of the laser printer according to the embodiment of the present invention, the halogen lamp (1), the first and second brackets (3a) (3 ') , A fixing frame 4, a fixing screw 5, 5 ′, and a cushioning means 10.

The halogen lamp 1 is installed in the lengthwise direction of the heating roller 2 in the same manner as the conventional one, and the first and second brackets 3a and 3 'of the halogen lamp 1 Welded at both ends.

In addition, the first and second brackets 3a and 3 'are fastened to both ends of the fixing frame 4 by the fixing screws 5 and 5' to fix the halogen lamp 1 to the fixing frame ( 4) is fixedly supported.

On the other hand, the buffer means (10) added in accordance with the features of the present invention is installed in a portion of the first bracket (3a), as shown in Figure 3 the first bracket (3, see Fig. 1) direction of the required It is formed by bending to approximately U shape. In the illustrated example, but the buffer means bent in a simple U-shape, but not necessarily limited to this, the bent portion is possible in various shapes. For example, it may be formed into a V-type, W-type, waveform, and the like.

The shock absorbing means 10 as described above absorbs the tensile and compressive stresses of the halogen lamp 1 and its welded portion, which are caused by the temperature rise of the halogen lamp 1 itself or the temperature rise of the fixing frame 4. The shock applied from the outside is absorbed so that the halogen lamp and / or its welded portion is not broken by the above stress. Therefore, it is possible to prevent the breakage of the halogen lamp and the disconnection of the welded part as in the prior art.

In addition, according to a preferred embodiment of the present invention, the buffer means 10 is not shown in the drawings, but may be installed in both the first and second brackets 3a and 3 ', respectively. According to this embodiment, more effective absorption of tensile and compressive stress and external shock can be absorbed, so that the halogen lamp can be stably supported.

According to the present invention as described above, the first and second brackets for fixing the halogen lamp to the fixing frame can absorb the tensile and compressive stress or external shock caused by the temperature rise of the halogen lamp and the temperature rise of the fixing frame. Since the shock absorbing means is provided, the halogen lamp is not broken or the welded part is disconnected due to the above tensile and compressive stress or external impact. Therefore, it is possible to prevent the occurrence of a fixing failure due to breakage and disconnection of the halogen lamp.

As mentioned above, although shown and described with reference to the preferred embodiment for illustrating the principle of this invention of this invention, this invention is not limited to the structure and operation as it was 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.

1a and 1b are a plan view and a front view showing a halogen lamp fixing device for a conventional fuser,

Figure 2 is a front view showing a halogen lamp fixing device for fixing according to an embodiment of the present invention, and

3 is a perspective view showing a first bracket, which is a required configuration of the present invention.

<Description of Symbols for Main Parts of Drawings>

1; halogen lamp 2; heating roller

3,3a; 1st bracket 3 '; 2nd bracket

4; fixing frame 5, 5 '; fixing screw

10; buffer means

Claims (3)

In a halogen lamp fixing device for a fuser of a laser printer, wherein the first and second brackets welded to both ends of the halogen lamp are fastened to the fixing frame by fixing screws. Fixing the halogen lamp for the fuser of the laser printer, characterized in that any one of the first and second brackets is provided with a shock absorbing means for absorbing the tensile and compressive stress or external impact applied to the halogen lamp and its welded joint. Device. The method of claim 1, A halogen lamp fixing device for a fuser of a laser printer, characterized in that the buffer means is provided in both the first and second brackets. The method according to claim 1 or 2, The buffer means is a halogen lamp fixing device for the fuser of the laser printer, characterized in that consisting of a bent portion formed in a portion of the bracket.