KR20060011325A - Mirror support apparatus - Google Patents

Abstract

The disclosed mirror supporting apparatus includes a base having a mirror and a mirror installed upright, and a mount formed at one side of the base parallel to the mirror, and having a mounting portion having a vertical wall to which the mirror is coupled and a coupling member for elastically coupling the mirror to the mounting portion. In the apparatus, the mounting portion is characterized in that it further comprises a first member formed on the bottom of the base to adjust the angle of rotation of the mounting portion.

According to the present invention, unlike the conventional mirror support device, not only the mirror is moved up and down on the optical system, but also the adjustment of the left and right rotation angles is easy. . In addition, the structure can be simplified to increase productivity.

Description

Mirror support apparatus {Mirror support apparatus}

1 is an exploded perspective view showing a conventional mirror support device.

2 is a view schematically showing the optical system configuration of the optical scanning device according to an embodiment of the present invention.

3 is an exploded perspective view showing a mirror support device according to a preferred embodiment of the present invention.

4 is a combined view of the mirror support device of FIG. 3.

<Description of the symbols for the main parts of the drawings>

101 ... laser diode 102 ... collimator lens

103 ... slit 104 ... cylinder lens

105.Polygon Mirror 106 ... Motor

107 ... fθ lens 108 ... imaging mirror

109 photosensitive drum 111 ... light sensor for synchronous signal detection

120 Beam splitter B ..

200 ... mirror 201 ... long                 

202 ... (mirror) hem width 210 ... mount

220 ... base 222 ... guide member

230 ... first member 240 ... vertical wall

241 rail contact 242 flat

243 Contact points 246 Adjusters

248 ... projection 250 ... second member

252 control point 270 coupling member

272 ... weak elastic part 274 ... strong elastic part

276 Reflector 278 Combiner

The present invention relates to a mirror support device, and more particularly, to a mirror support device that can be adjusted up, down, left, and right.

BACKGROUND ART In general, a photonic device such as a laser scanning unit (LSU) is applied to an image forming apparatus that reproduces an image on printing paper such as a digital copying machine, an electrophotographic image forming apparatus, a facsimile, a barcode reader, and the like. In the optical system in which the optical scanning device is used, a mirror for reflecting light and changing an optical path is disposed. The mirror support device serves to support the mirror in the optical system and to adjust the light to be reflected at a desired position.

1 is an exploded perspective view showing a conventional mirror support device.                         

Referring to FIG. 1, a conventional mirror support apparatus includes a mirror 1, a mounting portion 10, a coupling member 70, and an adjustment screw 30. The mounting portion 10 includes a base 20 on which the mirror 1 is installed upright, and a vertical wall 40 formed in parallel with the mirror 1 to which the mirror 1 is coupled.

The adjusting hole 46 is provided on the vertical wall 40, and the adjusting screw 30 is engaged to move forward and backward by interfering with the mirror 1. At one end of the adjustment screw 30, an adjustment point 32 is formed in contact with the mirror 1 to move the mirror 1 forward and backward. Three protrusions 48 to which the coupling member 70 is coupled are formed in the vertical wall 40. One protrusion 48 is formed on the vertical wall 40 and two on both sides of the vertical wall 40.

The coupling member 70 includes a reflection hole 76 and a coupling hole 78, and fixes the mirror 1 to the mounting portion 10. The reflective hole 76 is formed in the coupling member 70 so that light is transmitted and reflected by the mirror 1. The coupling hole 78 is coupled to the protrusion 48 provided in the mounting portion 10 to couple the mirror 1 to the mounting portion 10.

Hereinafter, the operation of the mirror support apparatus according to the prior art will be described.

After mounting the lower end of the mirror 1 to the base 20 and the vertical wall 40, the coupling hole 78 of the coupling member 70 is coupled to the protrusion 48 of the mounting portion 10. Thus, by moving the adjusting screw 30 in the combined mirror support device is possible to adjust the vertical angle of the mirror (1).

As described above, according to the related art, since there is no member fixing the lower part when the mirror 1 is mounted on the mounting portion 10, mounting is difficult, and the position of the adjustment point 32 formed on the adjustment screw 30 and the mirror ( If 1) is not correct, there may be a difference in left and right angles during the retreat. In addition, according to the prior art, it is difficult to adjust the left and right direction angle of the mirror 1, the user convenience is inferior.

The present invention has been created to improve the above problems, it is possible to easily mount the mirror to the mounting portion, to prevent the difference in the left and right angles of the mirror after mounting, easy to adjust the angle in the left and right mirror The object is to provide a support device.

According to an aspect of the present invention, there is provided a pre-supporting apparatus including a mounting portion having a mirror, a base on which the mirror is installed upright, and a vertical wall formed on one side of the base to be parallel to the mirror, and the mirror being coupled to the mounting portion. A mirror supporting apparatus having a coupling member for resiliently engaging, the mounting portion comprising: a first member formed on a bottom surface of the base to adjust an angle of rotation of the mounting portion; It is characterized by further comprising.

The vertical wall is provided with an adjustment hole is coupled to the second member for interfering with the mirror to move forward and backward, one side of the vertical wall is formed with a rail-shaped contact portion having a surface inclined with respect to the vertical wall and the mirror contact Preferably, the base is provided with a guide member having a predetermined height to restrain the lower portion of the mirror.

It is preferable that a flat portion parallel to the vertical wall is formed on the lower side of the rail contact portion close to the base.

The coupling member may include a weak elastic portion for elastically biasing one side of the mirror toward the adjustment hole to allow the mirror to move back and forth by the second member, and a hard carbon for elastically biasing the other side of the mirror toward the flat portion. It is preferable to have a voice part.

The vertical wall is provided with a plurality of protrusions to which the coupling member is coupled, the first member is in the form of a worm wheel operated in conjunction with the worm gear, the coupling member is preferably one leaf spring.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a view schematically showing the optical system configuration of the optical scanning device according to a preferred embodiment of the present invention, Figure 3 is an exploded perspective view showing a mirror support device according to a preferred embodiment of the present invention, Figure 4 is Figure 3 Coupling of the mirror support device combined.

The mirror support apparatus of the present invention is used for optical scanning devices of devices such as digital copiers, electrophotographic image forming apparatuses, facsimiles, barcode readers, and the like. Hereinafter, the configuration and operation of the present invention will be described with an example of a mirror supporting apparatus used for an LSU (Laser Scanning Unit) which is an optical scanning apparatus of an electrophotographic image forming apparatus. The mirror support device of this embodiment is exemplified by the mirror support device used for the LSU, but the present invention is not limited thereto.                     

2, the mirror support apparatus includes a laser diode 101, a collimator lens 102, a slit 103, a cylinder lens 104, a beam splitter 120, a polygon mirror 105, and a motor 106. , optical elements such as an fθ lens 107, an imaging mirror 108, an optical sensor 111, and a mirror 200.

The laser diode 101 emits laser light, and the collimator lens 102 makes the emitted laser light parallel or convergent with respect to the optical axis. The slit 103 is attached to the front surface of the collimator lens 102 to limit the laser light passing through, the cylinder lens 104 forms the laser light passed through the slit 103 in a linear linear direction. The beam splitter 120 is disposed between the polygon mirror 105 and the fθ lens 107 on the same horizontal plane as the polygon mirror 105 and the fθ lens 107 so that some of the laser light passing through the cylinder lens is transmitted. And some are reflected. The polygon mirror 105 scans the laser light reflected from the beam splitter 120 by moving it at a constant speed in the horizontal direction. The path of light incident on the polygon mirror 105 is in a direction substantially opposite to the light reflection path from the polygon mirror 105. The motor 106 drives the polygon mirror 105 to rotate at a predetermined speed.

The fθ lens 107 has a constant refractive index with respect to the optical axis and focuses on the scanning surface by polarizing light of constant velocity reflected from the polygon mirror 105 in the main scanning direction and correcting aberration. The imaging mirror 108 reflects the laser light passing through the f? Lens 107 and forms an image on the surface of the photosensitive drum 109 as an imaging surface in a point shape. The optical sensor 111 receives the laser light to match the horizontal synchronization, and the mirror 200 reflects the laser light toward the optical sensor 111 for detecting the synchronization signal. When the polygon mirror 105 is rotated in the direction of arrow A, laser light is optically reflected in the direction of arrow B (main scanning direction) to record image information on the surface of the photosensitive drum 109. The mirror support apparatus according to the preferred embodiment of the present invention may be applied to the mirror 200.

Hereinafter, a mirror support apparatus on which the mirror 200 is mounted will be described in detail.

Referring to FIG. 3, the mirror support apparatus according to the preferred embodiment of the present invention includes a mirror 200, a mounting portion 210, a coupling member 270, and a first member 230. The mounting unit 210 includes a base 220 in which the mirror 200 is installed upright and a vertical wall 240 formed in parallel with the mirror 200 to which the mirror 200 is coupled.

The guide member 222 is provided to the base 220 to have a predetermined height to restrain the lower portion of the mirror 200. The guide member 222 is processed to fit the long width 201 of the mirror 200 to restrict the width movement of the mirror 200, the mirror 200 in the "E" direction to enable the forward and backward movement of the mirror 200 It is preferable to process more relaxedly than the short width 202 of ().

The adjusting hole 246 is provided on the vertical wall 240, and the second member 250 which moves forward and backward by interfering with the mirror 200 is coupled. At one end of the second member 250, an adjustment point 252 is formed to contact the mirror 200 to move the mirror 200 forward and backward.

The rail contact portion 241 is formed at one side of the vertical wall 240 and has an inclined surface to which the mirror 200 is in contact with the vertical wall 240. The rail contact portion 241 may have a constant width as shown in FIG. 3, but may be integrally formed with the vertical wall 240. Such modifications are examples of the present invention and do not limit the technical scope of the present invention. It is preferable that a flat portion 242 parallel to the vertical wall 240 is formed at a lower side of the rail contact portion 241 near the base 220.

The flat part 242 supports the mirror 200 together with the guide member 222 when the mirror 200 is mounted on the mounting part 210. The flat portion 242 is preferably formed side by side on the vertical wall 240, it may be formed to be inclined. The contact portion 243 refers to a portion where the rail-shaped contact portion 241 and the flat portion 242 contact each other.

The mirror 200 may move forward and backward by using the contact portion 243 as a contact at the time of interference by the second member 250. Preferably, the vertical wall 240 is provided with a plurality of protrusions 248 to which the coupling member 270 is coupled. Two protrusions 248 are preferably formed on both sides of the adjusting hole 246 and the lower side of the vertical wall 240 so that the mirror 200 is stably coupled.

The coupling member 270 includes a weak elastic portion 272, a rigid elastic portion 274, and a reflective hole 276, and elastically couples the mirror 200 to the mounting portion 210. The weak elastic portion 272 is provided on one side of the coupling member 270, by elastically biasing one side of the mirror 200 toward the adjustment hole 246, the mirror 200 can be moved forward and backward by the second member 250 Do it. The weak elastic portion 272 is preferably designed so that the amount of warpage is large and the elastic range is wide. The rigid elastic portion 274 is provided on the other side of the coupling member 270, and elastically biases the other side of the mirror 200 toward the flat portion 242. The rigid elastic portion 274 preferably has a small amount of warpage and a narrow elastic region. The weak elastic portion 272 coupled to the adjustment hole 246 side has a wide elastic range, and the rigid elastic portion 274 coupled to the flat portion 242 side has a narrow elastic range, thereby forming the second member 250. It is possible to adjust the upper and lower angles of the mirror during the forward and backward movement. The reflective hole 276 is formed in the coupling member 270 so that light is transmitted and reflected by the mirror 200. Coupling member 270 is preferably formed with a coupling hole 278 that is coupled to the protrusion 248 of the mounting portion 210. Two coupling holes 278 are preferably formed on each of two sides, that is, four coupling holes are formed so as to stably couple the mirror 200 to the mounting unit 210. Preferably, the coupling member 270 has one leaf spring.

The first member 230 is formed on the bottom of the base 220 to adjust the rotation direction angle of the mounting portion 210. The worm gear (not shown) is capable of smooth rotation and has a large reduction ratio, which is advantageous for adjusting the left and right angles of the mirror 200 having high sensitivity on the optical system. Therefore, the first member 230 is preferably in the form of a worm wheel to be able to interlock with a worm gear (not shown).

Hereinafter, the operation of the mirror support device and the optical scanning device equipped with the same according to a preferred embodiment of the present invention will be described.

A beam splitter 120 is disposed between the fθ lens 107 and the polygon mirror 105. The laser light passing from the laser diode 101 through the collimator lens 102, the slit 103 and the cylinder lens 104 is reflected by the beam splitter 120 and is incident on the center portion of the fθ lens 107. The laser light passing through 107 is incident on the reflecting surface of the polygon mirror 105. The laser light reflected from the reflecting surface of the polygon mirror 105 passes through the center portion of the f? Lens 107 again, and the optical path of the imaging mirror 108 is bent to form an image on the surface of the photosensitive drum 109. The optical sensor 111 receives the laser light passing through the f θ lens 107 to adjust horizontal synchronization, and the mirror 200 coupled to the mirror support device reflects the laser light toward the optical sensor 111 for detecting the synchronization signal. Let it be.

Hereinafter, the operation of the mirror support apparatus combined with the mirror 200 will be described in detail. Referring to FIG. 4, after inserting the lower end of the mirror 200 into the guide member 222, the coupling hole 278 of the coupling member 270 is coupled to the protrusion 248 of the mounting portion 210. The vertical angle of the mirror 200 can be adjusted by moving the second member 250 forward and backward in the coupled mirror support device. At this time, since the elastic range of the weak elastic portion 272 coupled with the upper end of the mirror 200 is wide, the vertical angle of the mirror 200 can be easily adjusted. The angle of rotation of the mirror support apparatus may be adjusted by operating a worm gear (not shown) interlocked with the first member 230.

According to the configuration as described above, the present invention, unlike the conventional invention, adjusts the light incident on the mirror 200 in the vertical direction using the second member 250, and adjusts in the rotation direction using the first member 230. Can be. That is, the present invention may adjust the mirror 200 up and down, left and right so that light is emitted to a desired position.

As described above, the mirror support device according to the present invention, unlike the conventional invention, facilitates the adjustment of the right and left rotation angles as well as the mirror up and down on the optical system, and by providing a protrusion at the portion receiving the force in the retraction direction, It can also serve as a stable spring. In addition, the structure can be simplified to increase productivity. The mirror support apparatus of the present invention is used for optical scanning devices of devices such as digital copiers, electrophotographic image forming apparatuses, facsimiles, barcode readers, and the like.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. Will understand. Therefore, the true technical protection scope of the present invention will be defined by the claims below.

Claims (5)

With mirrors, A mounting part having a base on which the mirror is installed upright and a vertical wall formed on one side of the base to be parallel to the mirror, and to which the mirror is coupled; In the mirror support device having a coupling member for elastically coupling the mirror to the mounting portion, The mounting portion has a first member formed on the bottom of the base to adjust the angle of rotation of the mounting portion; The mirror support device further comprises. The method of claim 1, The vertical wall is provided with an adjustment hole is coupled to the second member for moving forward and backward interference the mirror, One side of the vertical wall has a rail-shaped contact portion having a surface inclined with respect to the vertical wall and the mirror contacts, The base is provided with a guide member having a predetermined height to restrain the lower portion of the mirror. The method of claim 2, And a flat portion parallel to the vertical wall is formed at a lower side of the rail-shaped contact portion close to the base. The method according to claim 2 or 3, The coupling member, A weak elastic portion for elastically biasing one side of the mirror toward the adjustment hole to allow the mirror to be moved back and forth by the second member; And a rigid elastic portion for elastically biasing the other side of the mirror toward the flat portion. The method of claim 4, wherein The vertical wall is provided with a plurality of protrusions to which the coupling member is coupled, The first member is in the form of a worm wheel operated in conjunction with a worm gear, And the coupling member is one leaf spring.

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