JP2008155410A - Optical scanning apparatus and image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an optical scanning apparatus which enables miniaturization in comparison with the case where adjusting members for adjusting a plurality of optical components and the like for which adjustments of postures are necessary, are not overlapped, and to obtain an image forming apparatus. <P>SOLUTION: Positions of reflective mirrors 116Y-116K are adjusted and fixed on a side wall 102G. Then, a single laser beam array 108K is emitted, and while a detecting substrate 130 is moved in the arrow mark H direction, the position of the detecting substrate 130 is adjusted. In this case, as the detecting substrate 130 and brackets 111C and 111K are overlapped and arranged, the detecting substrate 130 and the brackets 111C and 111K do not interfere each other. Therefore, even when the optical scanning apparatus 100 is miniaturized, it is unnecessary to change the sizes of respective adjusting members, and workability of adjustments is kept. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an optical scanning device and an image forming apparatus.

  Conventionally, in an image forming apparatus such as a printer or a copying machine, a light beam emitted from a light source is deflected by a polygon mirror, and the reflection direction of the light beam is adjusted by an optical component such as a reflection mirror to scan the surface of the photoreceptor. Optical scanning devices are widely used.

  As an example of an optical scanning device, there is an optical scanning device in which a laser beam emitted from a laser light source is collimated by a collimator lens, and then incident on a rotating polygon mirror and deflected in the main scanning direction by the rotation of the rotating polygon mirror ( For example, see Patent Document 1).

This optical scanning device has an optical component rotation adjustment mechanism in which the reflection mirror of the optical component is rotated by a rotation adjustment member provided on the outer wall of the housing, the direction of the laser beam is adjusted, and then the rotation adjustment member is fixed with a screw. Is provided.
Japanese Patent No. 3470555

  An object of the present invention is to provide an optical scanning device and an image forming apparatus that can be reduced in size as compared with a case where adjustment members for adjusting a plurality of optical components and the like that require posture adjustment do not overlap. .

  An optical scanning device according to a first aspect of the present invention is an optical scanning device in which a light beam emitted from a light source is deflected by a deflector and the surface of a scanned object is scanned by an optical component. A plurality of adjusting members that independently adjust the posture of the light source and the optical component, and at least one pair of the adjacent adjusting members are overlapped without being in contact with each other.

  An optical scanning device according to a second aspect of the present invention includes a plurality of the light sources, and a downstream light source adjustment member that adjusts an attitude of the light source positioned on the downstream side of the optical path of the light beam. It is characterized by being arranged farther from the outer wall of the housing than the upstream light source adjustment member that adjusts the posture of the light source located on the upstream side.

  The optical scanning device according to claim 3 of the present invention is such that the plurality of light sources are for black and non-black, and the black adjustment member for adjusting the posture of the black light source is the non-black light source. It is characterized in that it is closer to the outer wall of the housing than the non-black adjusting member for adjusting the posture of the housing.

  According to a fourth aspect of the present invention, there is provided an optical scanning device comprising a plurality of the optical components, wherein a downstream optical component adjusting member that adjusts an attitude of the optical component positioned on the downstream side of the optical path of the light beam, It is characterized in that it is arranged farther from the outer wall of the casing than the upstream optical component adjusting member that adjusts the posture of the optical component located on the upstream side of the optical path of the beam.

  The optical scanning device according to claim 5 of the present invention is characterized in that the position is adjusted by the adjustment member in the order of the light source, the optical component, and a sensor that synchronizes writing on the surface of the scanning object. .

  An image forming apparatus according to a sixth aspect of the present invention is the optical scanning device according to any one of the first to sixth aspects, a scanned object on which a latent image is formed by the optical scanning device, and the A developing unit that exposes the latent image formed on the scanned body with a developer to form a developer image; a transfer unit that transfers the developer image that is exposed in the developing unit onto a recording medium; and And a fixing unit that fixes the developer image transferred by the transfer unit onto the recording medium.

Since the present invention has the above configuration,
According to the first aspect of the present invention, it is possible to reduce the size as compared with a case where adjustment members for adjusting a plurality of optical components and the like that require posture adjustment do not overlap.

  According to the second aspect of the present invention, it is possible to prevent a hand or the like from coming into contact with the adjusted adjustment member, as compared with a case where adjustment members for adjusting a plurality of optical components or the like that require posture adjustment do not overlap. .

  According to the third aspect of the present invention, the adjustment of the optical components is facilitated as compared with the case where the adjustment members for adjusting the plurality of optical components and the like that require posture adjustment do not overlap.

  According to the fourth aspect of the present invention, it is possible to prevent a hand or the like from coming into contact with the adjusted adjustment member as compared with a case where adjustment members for adjusting a plurality of optical components or the like that require posture adjustment do not overlap. .

  According to the fifth aspect of the present invention, it is possible to prevent a hand or the like from coming into contact with the adjusted adjustment member as compared with a case where adjustment members for adjusting a plurality of optical components or the like that require posture adjustment do not overlap. .

  According to the sixth aspect of the present invention, it is possible to reduce the size of the image forming apparatus as compared with a case where adjustment members for adjusting a plurality of optical components and the like that require posture adjustment do not overlap.

  A first embodiment of an optical scanning device and an image forming apparatus of the present invention will be described with reference to the drawings.

  FIG. 1 shows a printer 10 as an image forming apparatus.

  The printer 10 is provided with an optical scanning device 100 that performs exposure by emitting light beams 60Y, 60M, 60C, and 60K during image formation.

  The optical scanning device 100 includes an optical box 102 that houses optical components. A cylindrical shaft 138 is provided above the optical box 102 from the front side to the back side of the paper surface, and a projection 102D is formed at the lower end of the optical box 102.

  Further, the optical scanning device 100 is fixed in the printer 10 by fitting the protrusion 102D into the hole 13 formed in the housing 12 and locking the shaft 138 at a locking portion (not shown). It is removable.

  At a position adjacent to the optical scanning device 100, a control unit 50 for controlling the operations of the optical scanning device 100 and each part of the printer is provided.

  A paper storage box 14 for storing the recording paper P is provided below the printer 10. A pair of registration rollers 16 for adjusting the position of the leading end of the recording paper P is provided above the paper storage box 14.

  An image forming unit 18 is provided at the center of the printer 10.

  The image forming unit 18 includes four photosensitive drums 20Y, 20M, 20C, and 20K corresponding to yellow (Y), magenta (M), cyan (C), and black (K) toners. These are tandem types that are lined up and down.

  Charging rollers 22Y, 22M, 22C, and 22K that charge the surfaces of the photosensitive drums 20Y, 20M, 20C, and 20K are provided on the upstream side in the rotation direction of the photosensitive drums 20Y, 20M, 20C, and 20K.

  Further, on the downstream side in the rotation direction of the photoconductor drums 20Y, 20M, 20C, and 20K, developing units that form toner images on the photoconductors 20Y, 20M, 20C, and 20K with Y, M, C, and K toners, respectively. 24Y, 24M, 24C, and 24K are provided.

  On the other hand, the first intermediate transfer member 26 is in contact with the photosensitive drums 20Y and 20M, and the second intermediate transfer member 28 is in contact with the photosensitive drums 20C and 20K. The third intermediate transfer member 30 is in contact with the first intermediate transfer member 26 and the second intermediate transfer member 28.

  A transfer roll 32 is provided at a position facing the third intermediate transfer member 30. The recording paper P is conveyed through an area sandwiched between the transfer roll 32 and the third intermediate transfer body 30, and the toner image on the third intermediate transfer body 30 is transferred to the recording paper P.

  A fixing device 36 is provided downstream of the paper transport path 34 through which the recording paper P is transported. The fixing device 36 includes a heating roller 38 and a pressure roller 40, and heats and presses the recording paper P to fix the toner image on the recording paper P.

  The recording paper P on which the toner image is fixed is output to the paper receiving portion 44 by the paper transport roller 42.

  Here, image formation of the printer 10 will be described.

  When image formation is started, the surfaces of the photosensitive drums 20Y to 20K are charged.

  Light beams 60Y to 60K corresponding to the output image are irradiated from the optical scanning device 100 onto the surfaces of the charged photosensitive drums 20Y to 20K, and electrostatic latent images corresponding to the respective color separation images are formed on the photosensitive drums 20Y to 20K. An image is formed.

  The developing devices 24Y to 24K selectively apply toners of respective colors, that is, Y to K, to the electrostatic latent images, and Y to K toner images are formed on the photosensitive drums 20Y to 20K.

  Thereafter, the magenta toner image is primarily transferred from the magenta photosensitive drum 20M to the first intermediate transfer member 26. Further, the yellow toner image is primarily transferred from the yellow photosensitive drum 20 </ b> Y to the first intermediate transfer member 26, and is superimposed on the magenta toner image on the first intermediate transfer member 26.

  On the other hand, a black toner image is primarily transferred from the black photosensitive drum 20K to the second intermediate transfer member. Further, a cyan toner image is primarily transferred from the cyan photosensitive drum 20 </ b> C to the second intermediate transfer member 28, and is superimposed on the black toner image on the second intermediate transfer member 28.

  The magenta and yellow toner images primarily transferred to the first intermediate transfer member 26 are secondarily transferred to the third intermediate transfer member 30. On the other hand, the black and cyan toner images primarily transferred to the second intermediate transfer member 28 are also secondarily transferred to the third intermediate transfer member 30.

  Here, the magenta and yellow toner images that have been secondarily transferred first, and the cyan and black toner images are superimposed, and a color (three colors) and black full-color toner images are formed on the third intermediate transfer member 30. Is done.

  The secondary-transferred full-color toner image reaches an area sandwiched between the third intermediate transfer body 30 and the transfer roll 32. In synchronization with the timing, the recording paper P is conveyed from the registration roll 16 to the area, and the full-color toner image is thirdarily transferred (final transfer) onto the recording paper P.

  Thereafter, the recording paper P is sent to the fixing device 36 and passes through an area sandwiched between the heating roll 38 and the pressure roll 40. At that time, the full color toner image is fixed on the recording paper P by the action of heat and pressure applied from the heating roll 38 and the pressure roll 40. After fixing, the recording paper P is discharged, and the formation of a full color image on the recording paper P is completed.

  Next, the optical scanning device 100 will be described.

  First, the internal structure of the optical scanning device 100 will be described.

  As shown in FIGS. 3 and 4, the optical scanning device 100 includes an optical box 102. The optical box 102 includes an upper side wall 102A and a lower side wall 102C, and a partition wall 102B is stretched between the upper side wall 102A and the lower side wall 102C. The optical box 102 is divided into a first case portion 166 and a second case portion 168 with the partition wall 102B as a boundary.

  The optical box 102 has side walls 102E, 102F, and 102G, and the first case portion 166 has a protective cover 134.

  Here, the single laser beam arrays 108Y to 108K fitted in the LD holders 104Y to 104K are loosely temporarily fixed to the side wall 102G of the first case portion 166 with screws (not shown).

  From the single laser beam arrays 108Y to 108K, light beams 60Y to 60K are emitted according to the respective colors at the time of image formation.

  The respective color light beams 60Y to 60K pass through holes 176Y to 176K formed in the side wall 102G, pass through collimator lenses 178Y to 178K, and are reflected by the reflection mirrors 180Y to 180K.

  Subsequently, the color light beams 60 </ b> Y to 60 </ b> K pass through the cylinder lens 182, are reflected by the reflection mirror 184 and the reflection mirror 186, and enter the polygon mirror 140.

  The polygon mirror 140 includes a polygon mirror 142 that rotates about a rotation axis 144, and the rotation speed and the like are controlled by a rotation control board 146.

  The rotation control board 146 is fixed to one surface of the partition wall 102B by screws 172. One end of a cable (not shown) is connected to the connector 174 provided at one end of the rotation control board 146, and the other end of the cable is connected to the control unit 50 (see FIG. 1).

  Here, the color light beams 60Y to 60K incident on the polygon mirror 140 are scanned by the rotation of the polygon mirror 142, reflected by the reflection mirror 148, and guided to the second case portion 168.

  Next, as shown in FIGS. 3 and 5, in the second case portion 168, the light beams 60 </ b> Y to 60 </ b> K enter the first separation mirror 152 and the second separation mirror 154 through the lens 150.

  The first separation mirror 152 and the second separation mirror 154 are arranged in steps.

  The first separation mirror 152 reflects the light beams 60C and 60K.

  The light beam 60K reflected by the first separation mirror 152 is reflected by the reflection mirror 116K, and is guided to the photosensitive drum 20K (see FIG. 1) through the lens 160K. The light beam 60M is reflected by the reflecting mirrors 156 and 116C, and is guided to the photosensitive drum 20C (see FIG. 1) through the lens 160C.

  On the other hand, the second separation mirror 154 reflects the light beams 60Y and 60M in the opposite direction to the light beams 60C and 60K.

  The light beam 60Y reflected by the second separation mirror 154 is reflected by the reflection mirror 116Y and guided to the photosensitive drum 20Y (see FIG. 1) through the lens 160Y. The light beam 60M is reflected by the reflection mirrors 158 and 116M, and is guided to the photosensitive drum 20M (see FIG. 1) through the lens 160M.

  The lens 150 and the lenses 160Y to 160K constitute an Fθ lens.

  Here, in order to grasp the timing when the light beam 60K scans the photosensitive drum 20K, a detection substrate 130 that detects the start of scanning of the light beam 60K is disposed on the side wall 102G.

  A light receiving element 131 is provided on the detection substrate 130.

  The light receiving element 131 outputs an electrical signal corresponding to the amount of the incident light beam 60K to a circuit (not shown) on the detection substrate 130.

  The second case portion 168 is provided with a reflection mirror 190 and a lens 192, and a light beam 60K corresponding to the scanning start position is incident on the light receiving element 131.

  Accordingly, when the light beam 60K corresponding to the scanning start position is incident on the light receiving element 131, a scanning start timing signal is generated by the detection substrate 130, and the timing signal is transmitted to the control unit 50 (see FIG. 1) by a cable (not shown). Is transmitted.

  Next, the external structure of the optical scanning device 100 will be described.

  As shown in FIG. 2, the LD holders 104Y to 104K that hold the single laser beam arrays 108Y to 108K are formed with adjustment holes 106Y to 106K in which pins of position (posture) adjustment jigs (not shown) are fitted. ing.

  The LD holders 104Y to 104K are fixed with screws 110Y to 110K after the positions of the single laser beam arrays 108Y to 108K are adjusted.

  On the other hand, on the side wall 102G, brackets 111Y to 111K for adjusting the positions (postures) of the reflection mirrors 116Y to 116K are provided.

  The brackets 111Y to 111K are composed of upper brackets 114Y to 114K and lower brackets 112Y to 112K, respectively. The upper brackets 114Y to 114K are fixed on the lower brackets 112Y to 112K by screws 128Y to 128K.

  The upper brackets 114Y to 114K and the lower brackets 112Y to 112K are formed with penetrating insertion holes 126Y to 126K through which the reflection mirrors 116Y to 116K are inserted and held.

  Further, the end portions of the reflection mirrors 116Y to 116K are restricted from moving in the axial direction (direction from the front to the back of the paper) by plate springs 118Y to 118K having one ends fixed to the upper brackets 114Y to 114K.

  A pair of long holes 122Y to 122K are formed in the lower brackets 112Y to 112K, respectively.

  Support bosses 124Y to 124K standing on the side wall 102G are inserted through the long holes 122Y to 122K, respectively. Thereby, the brackets 111Y to 111K are movable in the directions of arrows D, E, F, and G.

  Further, the brackets 111Y to 111K are loosely temporarily fixed on the side wall 102G with screws 120Y to 120K before the position adjustment of the reflection mirrors 116Y to 116K.

  On the other hand, a long hole 134 is formed in the detection substrate 130. The detection board 130 can be moved in the direction of arrow H by inserting the boss 136 protruding from the side wall 102G into the elongated hole 134.

  In addition, a long hole 137 is formed in the detection substrate 130, and a screw 132 is inserted into the long hole 137 and is loosely fixed on the column 133 (see FIG. 5).

  Next, the overlapping state of the adjustment member will be described.

  6A shows a cross-sectional state when the bracket 111K as the adjusting member and the detection board 130 are viewed from the direction of the arrow P in parallel with the plane of the side wall 102G in FIG.

  As shown in FIG. 6 a, the detection board 130 is fixed to the column 133 by adjusting the position and fastening the screw 132 to the elongated hole 137. Further, the lower bracket 112K is fixed to a post (not shown) protruding from the side wall 102G with a screw 120K (see FIG. 2).

  Here, the detection board 130 is located on the side farther from the side wall 102G than the bracket 111K, and the detection board 130 and the bracket 111K are arranged so as to overlap with a predetermined width W1.

  On the other hand, FIG. 6b shows a state in which the LD holder 104Y and the bracket 111M are viewed from the direction of the arrow Q in parallel with the plane of the side wall 102G in FIG.

  As shown in FIG. 6b, a socket 204 and a lead wire 206 for supplying current are connected to the single laser beam array 108Y attached to the LD holder 104.

  The LD holder 104Y is fixed on the side wall 102G by fastening the screw 110Y to the fastening holes 208Y and 210Y. Further, the bracket 111M is fixed to a support (not shown).

  Here, the bracket 111M is positioned on the side farther from the side wall 102G than the LD holder 104Y, and the LD holder 104Y and the bracket 111M are arranged so as to overlap with a predetermined width W2.

  Next, the operation of the first embodiment of the present invention will be described.

  First, the optical axis positions of the single laser beam arrays 108Y to 108K are adjusted while moving the LD holders 104Y to 104K shown in FIG. 2 using a light source position adjusting jig (not shown), and the LDs are fixed with screws 110Y to 110K. The holders 104Y to 104K are fixed.

  Next, the inclination and position of each optical component such as a reflection mirror provided in the first case part are adjusted and fixed by fixing means such as screw tightening or adhesion.

  Next, in the second case portion, the separation mirrors 152 and 154 are tilted and adjusted in position, and fixed by fixing means such as screw tightening or adhesion.

  Next, in order to adjust the emission directions of the respective light beams 60Y to 60K, the position and inclination of the reflection mirrors 116Y to 116K are adjusted.

  At this time, adjustment is performed while moving the brackets 111Y to 111K in the directions of arrows D, E, F, and G, respectively. However, since the LD holder 104K and the bracket 111M are arranged so as to overlap, The LD holder 104K and the bracket 111M do not interfere during adjustment.

  Further, in the optical path of the light beams 60Y to 60K, the LD holder 104K located on the upstream side is closer to the side wall 102G than the bracket 111M located on the downstream side. Therefore, when adjusting the position of the bracket 111M, There is no contact with 104K.

  Next, after adjustment, the brackets 111Y to 111K are fixed with screws 120Y to 120K, and the reflection mirrors 116Y to 116K are fixed to the side wall 102G.

  Next, the single laser beam array 108K is caused to emit light, and the polygon mirror 140 is rotated. Here, while moving the detection substrate 130 in the direction of the arrow H, the output from the light receiving element 131 is confirmed, and the positions of the light receiving element 131 and the detection substrate 130 are adjusted.

  At this time, since the detection board 130 and the brackets 111C and 111K are arranged to overlap, the detection board 130 and the brackets 111C and 111K do not interfere with each other when the position of the detection board 130 is adjusted.

  The adjustment of the optical scanning device 100 is performed by these adjustment steps.

  As described above, since the overlapped adjustment members do not interfere with each other, even when the optical scanning device 100 is downsized, it is not necessary to change the size of each adjustment member, and adjustment workability is maintained. .

  Next, a second embodiment of the optical scanning device and the image forming apparatus of the present invention will be described with reference to the drawings.

  Note that components that are basically the same as those in the first embodiment described above are given the same reference numerals as those in the first embodiment, and descriptions thereof are omitted.

  FIG. 7A is a partial side view of the optical box 102 of the optical scanning device 100, and shows a state in which the LD holder 104K and the LD holder 104C overlap with each other with a width W3.

  FIG. 7b shows a state where the LD holder 104K and the LD holder 104C are viewed from the direction of the arrow R in FIG. 7a.

  As shown in FIG. 7b, sockets 214C and 214K and lead wires 216C and 216K for supplying current are connected to the single laser beam arrays 108K and 108C on the LD holders 104K and 104C, respectively.

  The LD holder 104K is fixed to the side wall 102G by fastening screws 110K to the fastening holes 208K and 220K.

  The LD holder 104C is fixed to a column 218 erected from the side wall 102G by fastening a screw 110C to the fastening hole 208C.

  Here, the LD holder 104C is located farther from the side wall 102G than the LD holder 104K by the height of the support column 218, and is overlapped with the width of W3 so as to cover a part of the LD holder 104K. ing.

  Next, the operation of the second embodiment of the present invention will be described.

  First, the optical axis of the black light beam 60K during image formation is adjusted.

  The optical axis adjustment is performed by checking the optical axis position while moving the LD holder 104K using an adjustment jig (not shown), and fixing the LD holder 104K with a screw 110K when the optical axis position is reached. This is performed by a method of fixing the position of the laser beam array 108K.

  Next, the optical axis adjustment of the color light beams 60Y, 60M, and 60C during image formation is performed in the same procedure as the optical axis adjustment of the light beam 60K, and the positions of the single laser beam arrays 108Y, 108M, and 108C are fixed. Is done.

  At this time, since the LD holder 104K and the LD holder 104C are arranged so as to overlap, the LD holder 104K and the LD holder 104C do not interfere with each other.

  Further, since the LD holder 104K is closer to the side wall 102G than the LD holder 104C, it does not come into contact with the LD holder 104K when adjusting the position of the LD holder 104C.

  Since the overlapped LD holders 104K and 104C do not interfere in this way, even when the optical scanning device 100 is downsized, there is no need to change the size of each adjustment member, and adjustment workability is maintained. The

  Next, a third embodiment of the optical scanning device and the image forming apparatus of the present invention will be described with reference to the drawings.

  Note that components that are basically the same as those in the first and second embodiments described above are given the same reference numerals as in the first and second embodiments, and descriptions thereof are omitted.

  As shown in FIG. 8, the optical scanning device 230 is composed of the same light source and optical components as those in the first embodiment described above, and includes a reflection mirror 158 and a reflection mirror arranged on the optical path 60M (see FIG. 1) of the light beam. 116M.

  On the side wall 232 of the optical scanning device 230, brackets 233 and 235 for adjusting the position (posture) of the reflection mirrors 158 and 116M are provided.

  The brackets 233 and 235 are composed of upper brackets 236 and 248 and lower brackets 234 and 246, respectively. The upper brackets 236 and 248 are fixed on the lower brackets 234 and 246 by screws 128M.

  The upper brackets 236 and 248 and the lower brackets 234 and 246 are formed with penetrating insertion holes 242 and 254 through which the reflection mirrors 158 and 116M are inserted and held.

  Further, movement of the end portions of the reflection mirrors 158 and 116M in the axial direction (direction from the front to the back of the paper surface) is restricted by leaf springs 244 and 118M whose one ends are fixed to the upper brackets 236 and 248, respectively.

  A pair of elongated holes 240 and 252 are formed in the lower brackets 234 and 246, respectively.

  Support bosses 238 and 250 erected on the side wall 232 are inserted into the long holes 240 and 252, respectively. Thereby, the brackets 233 and 235 are movable in the directions of arrows J and K.

  Further, the brackets 233 and 235 are temporarily fixed loosely on the side wall 232 with screws 120M before the positions of the reflection mirrors 158 and 116M are adjusted.

  Here, the bracket 235 is located on the side farther from the side wall 232 than the bracket 233, and the bracket 233 and the bracket 235 are disposed so as to overlap with a predetermined width W4.

  Next, the operation of the third embodiment of the present invention will be described.

  After the light source (not shown) of the optical scanning device 230 is adjusted, the position and inclination of the reflection mirrors 158 and 116M are adjusted. Note that the reflection mirror 158 is on the upstream side of the reflection mirror 116M on the optical path (60M) of the light beam (not shown), and is adjusted first.

  Here, adjustment is performed while moving the brackets 233 and 235 in the directions of arrows J and K, respectively. However, since the bracket 233 and the bracket 235 are arranged so as to overlap with each other, The bracket 235 does not interfere.

  After this adjustment, the brackets 233 and 235 are fixed with screws 120M, and the reflection mirrors 158 and 116M are fixed to the side wall 232.

  As described above, since the overlapped adjustment members do not interfere with each other, even when the optical scanning device 100 is downsized, it is not necessary to change the size of each adjustment member, and adjustment workability is maintained. .

  In addition, this invention is not limited to said embodiment.

  The overlapping combination may be any combination as long as the adjustment members are adjusted on the side wall 102G. For example, the LD holder 104C and the bracket 111Y may be overlapped, or the bracket 111Y and the bracket 111M may be overlapped.

1 is a cross-sectional view of a printer according to a first embodiment of the present invention. It is a side view of the optical scanning device concerning a 1st embodiment of the present invention. 1 is a cross-sectional view of an optical scanning device according to a first embodiment of the present invention. FIG. 3 is a plan view (cut along AA ′ in FIG. 2) of the first case portion of the optical scanning device according to the first embodiment of the present invention. FIG. 5 is a plan view (cut along BB ′ in FIG. 2) of a second case portion of the optical scanning device according to the first embodiment of the present invention. It is a fragmentary sectional view of the optical scanning device concerning a 1st embodiment of the present invention. (A) It is a partial side view of the optical scanning device concerning 2nd Embodiment of this invention. (B) It is a side view of the LD holder which concerns on 2nd Embodiment of this invention. It is a partial side view of the optical scanning device concerning a 3rd embodiment of the present invention.

Explanation of symbols

10 Printer (image forming device)
18 Image forming unit (developing part)
20Y photoconductor (scanned body)
20M photoconductor (scanned body)
20C photoconductor (scanned body)
20K photoconductor (scanned body)
32 Transfer roll (transfer section)
36 Fixing device (fixing part)
100 Optical scanning device (optical scanning device)
102 Optical box (housing)
102G side wall (outer wall)
104Y LD holder (adjustment member, adjustment member for other than black)
104M LD holder (adjustment member, adjustment member for other than black)
104C LD holder (adjustment member, downstream light source adjustment member, adjustment member for other than black)
104K LD holder (adjustment member, upstream light source adjustment member, black adjustment member)
108Y Single laser beam array (light source)
108M single laser beam array (light source)
108C Single laser beam array (light source)
108K single laser beam array (light source)
111Y Bracket (Adjustment member)
111M Bracket (Adjustment member)
111C Bracket (Adjustment member)
111K bracket (adjustment member)
116Y Reflective mirror (optical component)
116M Reflective mirror (optical component)
116C Reflective mirror (optical component)
116K reflection mirror (optical component)
130 Detection board (sensor)
140 Polygon mirror (deflector)
233 Bracket (Upstream optical component adjustment member)
235 Bracket (Downstream optical component adjustment member)

Claims (6)

In an optical scanning device that deflects a light beam emitted from a light source with a deflector and scans the surface of a scanned object with an optical component,
A plurality of adjustment members that independently adjust the posture of the light source and the optical component from the outside of the housing of the optical scanning device are provided, and at least one pair of the adjacent adjustment members overlap without contacting each other. An optical scanning device.   A downstream light source adjustment member that includes a plurality of the light sources and adjusts the posture of the light source located on the downstream side of the optical path of the light beam adjusts the posture of the light source located on the upstream side of the optical path of the light beam. The optical scanning device according to claim 1, wherein the optical scanning device is disposed farther from the outer wall of the housing than the upstream light source adjustment member.   The plurality of light sources are for black and non-black, and the black adjustment member for adjusting the attitude of the black light source is more housing than the non-black adjustment member for adjusting the attitude of the non-black light source The optical scanning device according to claim 2, wherein the optical scanning device is close to an outer wall of the optical scanner.   A plurality of optical components, and a downstream optical component adjusting member that adjusts the posture of the optical component positioned downstream of the optical path of the light beam, and the optical component positioned upstream of the optical path of the light beam. 4. The optical scanning device according to claim 1, wherein the optical scanning device is disposed farther from the outer wall of the housing than the upstream optical component adjusting member that adjusts the posture. 5.   5. The position of the light source, the optical component, and a sensor that synchronizes writing on the surface of the scanning object are adjusted by the adjusting member in the order described above. 5. The optical scanning device described. The optical scanning device according to any one of claims 1 to 6,
A scanned object on which a latent image is formed by the optical scanning device;
A developing unit that exposes the latent image formed on the scanned body with a developer to form a developer image; and
A transfer unit that transfers the developer image made visible in the developing unit onto a recording medium;
A fixing unit that fixes the developer image transferred by the transfer unit on the recording medium;
An image forming apparatus comprising:

Images