JP2008009285A - Optical scanner and its assembling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress positional deviation in fixing a light source holding member, an optical component holding member, and an optical sensor holding member, respectively in a fixing part. <P>SOLUTION: In the through hole 120 of the frame wall 56 of an optical box 50, a fixing screw 130 is inserted in a manner that the screw head 132 comes in contact with the inner wall face 56A of the frame wall 56, and is screwed onto on the screw hole 104 of a laser diode holder 100, so that the laser diode holder 100 is fixed on the outer wall face 56B of the frame wall 56. Being fixed this way, the screw head 132 is in contact with the inner wall face 56A of the frame wall 56 and not with the laser diode holder 100. As a result, even if the fixing screw 130 is tightened by turning the screw head 132 with a tool, the rotation of the laser diode holder 100 due to the rotary friction of the screw head 132 is suppressed, thereby the positional deviation of the adjusted optical axis of a laser diode 102 is suppressed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an optical scanning device and an assembling method of the optical scanning device.

  The laser diode that emits the laser is held by a laser diode holder, and the position of the laser diode holder is adjusted by an adjustment jig to adjust the position of the optical axis of the laser emitted from the laser diode. After the optical axis adjustment is completed, the laser diode holder is fixed to the optical box with a screw.

  Similarly, a holding member that holds an optical component such as a lens or a mirror or an optical sensor is also adjusted in position and then fixed to the optical box with a screw.

  As shown in FIG. 9, the laser diode holder 700 that holds the laser diode 702 is fixed to the outer wall surface 750 </ b> B of the optical box 750.

  As shown in FIG. 9B, the laser diode holder 700 is fixed to the outer wall surface 750B of the optical box 750 by adjusting the position of the laser diode holder 700 and adjusting the optical axis of the light beam L of the laser diode 702. Then, the fixing screw 730 is passed through the through hole 720 of the laser diode holder 700 and screwed into the screw hole 752 of the optical box 750 and tightened. When tightened in this way, the screw head 732 of the fixing screw 730 hits the laser diode holder 700. When the screw head 732 is further turned and tightened in order to fix the laser diode holder 700, as shown in FIG. 9A, the laser diode holder is caused by the frictional force generated by the rotation (arrow K1) of the screw head 732 of the fixing screw 730. 700 is slightly rotated (arrow K2). The slight rotation of the laser diode holder 700 (position shift) causes the optical axis of the adjusted laser diode 702 to shift.

  In addition, the laser diode holder is sandwiched between the lens base and the laser diode holder fixing plate, and the screw rotation torque is utilized by using the high precision pin provided in the lens base and the high precision hole of the laser diode holder. There has been proposed a configuration for preventing the accompanying rotation (for example, see Patent Document 1).

  However, such a configuration has a complicated structure, and when the screws are tightened, the pins are bent and accurate positioning is not possible unless the screws are tightened evenly.

Therefore, it is required to suppress the accompanying rotation with a configuration other than Patent Document 1.
JP 2004-241438 A

  The present invention has been made to solve the above-described problem, and an object thereof is to suppress a positional deviation when the light source holding member, the optical component holding member, and the optical sensor holding member are fixed to the fixing portion.

  In order to achieve the above object, an optical scanning device according to claim 1, wherein a light source holding member that holds a light source that emits a light beam, a screw hole provided in the light source holding member, and the light source on one surface. A fixing portion to which the holding member is fixed; a through hole provided in the fixing portion; and the screw head is in contact with the other surface opposite to the one surface; And a screw that is screwed into a screw hole of the light source holding member.

  In the optical scanning device according to claim 1, the screw is inserted into the through hole of the fixing portion so that the screw head comes into contact with the other surface, and is screwed into the screw hole of the light source holding member. A light source holding member is fixed to the surface.

  When fixed in this manner, the screw head comes into contact with the other surface of the fixing portion and does not come into contact with the light source holding member. Therefore, even if the screw head is turned with a tool or the like and the screw is tightened, the rotation of the light source holding member due to the friction of the rotation of the screw head is suppressed. Therefore, the positional deviation of the optical axis of the light source held by the light source holding member is suppressed.

  The optical scanning device according to claim 2, an optical component holding member that holds an optical component, a screw hole provided in the optical component holding member, and a fixing portion that fixes the optical component holding member to one surface. And a through hole provided in the fixing portion, and a screw head that is inserted into the through hole of the fixing portion and is in contact with the other surface opposite to the one surface, and the screw hole of the optical component holding member And a screw to be screwed onto the head.

  In the optical scanning device according to claim 2, the screw is inserted into the through hole of the fixing portion so that the screw head comes into contact with the other surface, and is screwed into the screw hole of the optical component holding member. An optical component holding member is fixed to one surface.

  When fixed in this manner, the screw head comes into contact with the other surface of the fixing portion and does not come into contact with the optical component holding member. Therefore, even if the screw head is turned with a tool or the like and the screw is tightened, the accompanying rotation of the optical component holding member due to the friction of the screw head rotation is suppressed. Accordingly, the positional deviation of the optical component held by the optical component holding member is suppressed.

  The optical scanning device according to claim 3 is an optical sensor holding member that holds an optical sensor that receives a light beam, a screw hole provided in the optical sensor holding member, and the optical sensor holding member on one surface. A fixing portion to be fixed; a through-hole provided in the fixing portion; and a screw head that is inserted into the through-hole of the fixing portion and is in contact with the other surface opposite to the one surface; And a screw that is screwed into a screw hole of the holding member.

  In the optical scanning device according to claim 3, the screw is inserted into the through hole of the fixing portion so that the screw head comes into contact with the other surface, and is screwed into the screw hole of the optical sensor holding member. An optical sensor holding member is fixed to one surface.

  When fixed in this way, the screw head comes into contact with the other surface of the fixing portion and does not come into contact with the optical sensor holding member. Therefore, even if the screw head is turned with a tool or the like and the screw is tightened, the rotation of the optical sensor holding member due to the friction of the rotation of the screw head is suppressed. Therefore, since the positional deviation of the optical sensor held by the optical sensor is suppressed, the optical sensor accurately receives the light beam.

  5. The method of assembling an optical scanning device according to claim 4, wherein a light source holding member that holds a light source that emits a light beam, a screw hole provided in the light source holding member, and the light source holding member fixed to one surface. Inserted into the through hole of the fixing portion so that the screw head comes into contact with the other surface of the fixing portion opposite to the one surface. A first screw for temporarily fixing the light source holding member to the one surface of the fixing portion, and adjusting the position of the light source holding member. Performing a second step of adjusting the optical axis of the light beam emitted from the light source, and a third step of fixing the light source holding member to the one surface of the fixing portion with the screw. It is a feature.

  In the method for assembling the optical scanning device according to the fourth aspect, the light source holding member is temporarily fixed to one surface of the fixing portion in the first step. In the second step, the position of the light source holding member is adjusted to adjust the optical axis of the light beam emitted from the light source.

  In the third step, the light source holding member is fixed to one surface of the fixing portion with a screw. At this time, the screw head is in contact with the other surface of the fixing portion and is not in contact with the light source holding member. Therefore, even if the screw head is turned with a tool or the like and the screw is tightened, the rotation of the light source holding member due to the friction of the rotation of the screw head is suppressed. Therefore, the positional deviation of the optical axis adjustment of the light source adjusted in the second step is suppressed.

  In addition, if the order of the process of making a light source holding member hold | maintain a light source will be before a 2nd process, it will not specifically limit. It may be before the first step or between the first step and the second step.

  The optical scanning device assembly method according to claim 5 is an optical component holding member for holding an optical component, a screw hole provided in the optical component holding member, and the optical component holding member fixed to one surface. A fixing portion, a through hole provided in the fixing portion, and a screw head so as to abut on the other surface opposite to the one surface of the fixing portion, and is inserted into the through hole of the fixing portion, A first step of temporarily fixing an optical component holding member holding the optical component to the one surface of the fixing portion; and a screw that is screwed into a screw hole of the optical component holding member. A second step of adjusting the position of the component holding member and a third step of fixing the optical component holding member to the one surface of the fixing portion with the screw are provided.

  In the method for assembling the optical scanning device according to the fifth aspect, the optical component holding member is temporarily fixed to one surface of the fixing portion in the first step. In the second step, the position of the optical component holding member is adjusted to adjust the position of the optical component.

  In the third step, the optical component holding member is fixed to one surface of the fixing portion with a screw. At this time, the screw head comes into contact with the other surface of the fixing portion and does not come into contact with the optical component holding member. Therefore, even if the screw head is turned with a tool or the like and the screw is tightened, the accompanying rotation of the optical component holding member due to the friction of the screw head rotation is suppressed. Therefore, the positional deviation of the optical component adjusted in the second step is suppressed.

  The order of the steps for holding the optical component on the optical component holding member is not particularly limited as long as it is before the second step. It may be before the first step or between the first step and the second step.

  The method of assembling the optical scanning device according to claim 6 includes: an optical sensor holding member that holds an optical sensor that receives a light beam; a screw hole provided in the optical sensor holding member; and the optical sensor on one surface. The fixing portion to which the holding member is fixed, the through hole provided in the fixing portion, and the penetration portion of the fixing portion so that the screw head comes into contact with the other surface of the fixing portion opposite to the one surface. A first step of temporarily fixing the optical sensor holding member to the one surface of the fixing portion, and a screw inserted into the hole and screwed into a screw hole of the optical sensor holding member. A second step of adjusting the position of the sensor holding member and adjusting the light receiving position of the light beam of the photosensor; and a third step of fixing the photosensor holding member to the one surface of the fixing portion with the screw; It is characterized by providing.

In the method of assembling the optical scanning device according to the sixth aspect, the optical sensor holding member is temporarily fixed to one surface of the fixing portion in the first step. In the second step, the position of the optical sensor holding member is adjusted, and the light receiving position of the optical sensor is adjusted. In the third step, the optical sensor holding member is fixed to one surface of the fixing portion with a screw. At this time, the screw head comes into contact with the other surface of the fixing portion and does not come into contact with the optical sensor holding member. Therefore, even if the screw head is turned with a tool or the like and the screw is tightened, the rotation of the optical sensor holding member due to the friction of the rotation of the screw head is suppressed. Therefore, the position shift of the receiving position of the optical sensor adjusted in the second step is suppressed.

  The order of the steps for holding the optical sensor on the optical sensor holding material is not particularly limited as long as it is before the second step. It may be before the first step or between the first step and the second step.

  As described above, according to the present invention, the rotation of the light source holding member, the optical component holding member, and the optical sensor holding member due to the friction of the screw head rotation is suppressed.

  As shown in FIG. 1, the optical scanning device 10 according to the embodiment of the present invention scans and exposes the photosensitive drum 12 in the main scanning direction with the light beam LA emitted from the laser diode 102.

  The light beam LA emitted from the laser diode 102 is converted into a parallel light beam by the collimator lens 14. Unnecessary light is removed by the slit 16 from the light beam LA converted into a parallel light beam by the collimator lens 14. The light beam LA from which unnecessary light has passed through the slit 16 is converged in the sub-scanning direction by the cylindrical lens 18.

  The light beam LA converged in the sub-scanning direction by the cylindrical lens 18 is reflected by the reflection mirror 20 and then deflected and scanned by the rotary polygon mirror 22 in the main scanning direction.

  The light beam LA deflected and scanned by the rotary polygon mirror 22 is scanned at a constant speed in the main scanning direction by the fθ lenses 24 and 25. The light beam LA that has passed through the fθ lenses 24 and 25 is reflected by the reflection mirror 26, and then shaped by the cylindrical mirror 202 in the sub-scanning direction and at the same time is reflected at an angle in the sub-scanning direction. Then, after passing through the dust-proof glass 28 provided in the exit window 51 of the optical box 50 (described later), the photosensitive drum 12 is scanned and exposed.

  On the other hand, the light beam LB in a region not used for scanning / exposure of the photosensitive drum 12 on the scanning start side of the light beam LA deflected / scanned by the rotary polygon mirror 22 is reflected by the pickup mirror 30 and is detected by the optical sensor 302. The image is formed on the (SOS (Start Of Scan) sensor). Then, the optical sensor 302 detects the light beam LB to detect that the rotational position of the rotary polygon mirror 22 has reached the scanning start position, and the optical scanning device 10 starts writing on the photosensitive drum 12 with the light beam LA. To do.

  Now, the laser diode 102, the collimator lens 14, the slit 16, the cylindrical lens 18, the reflection mirrors 20, 26, and 30, the rotary polygon mirror 22, the f-θ lenses 24 and 25, the cylindrical mirror 202, the optical sensor 302, and the like described above. The optical box 50 is housed.

  The optical box 50 includes a substantially square plate-like bottom surface 52 and a frame wall 54 constituting an outer frame along the outer periphery of the bottom surface 52. The frame wall 54 is composed of four surfaces, frame walls 55, 56, 57, and 58. Further, the emission window 51 provided with the dustproof glass 28 described above is provided on the frame wall 58.

  The collimator lens 14, the slit 16, the cylindrical lens 18, the reflection mirrors 20, 26, 30, the rotary polygon mirror 22, the f-θ lenses 24, 25 are fixed to the bottom surface 52 by attachment members (not shown), respectively. Yes.

  The laser diode 102 is held by the laser diode holder 100, the cylindrical mirror 202 is held by the mirror holders 200R and 200L at both ends in the longitudinal direction, and the optical sensor 302 is held by the sensor holder 300. The laser diode holder 100 is fixed to the frame wall 56, the mirror holders 200R and 200L are fixed to the frame walls 55 and 57, and the sensor holder 300 is fixed to the frame wall 57.

  As shown in FIG. 2, a screw hole 104 is formed in the laser diode holder 100. Further, the frame wall 56 is formed with a through-hole 120 opened to the inner wall surface 56A and the outer wall surface 56B. Then, the fixing screw 130 is inserted into the through hole 120 from the inner wall surface 56 </ b> A side of the frame wall 56 and screwed into the screw hole 104 of the laser diode holder 100, so that the laser diode holder 100 is engaged with the outer wall surface 56 </ b> B of the frame wall 56. Fixed. The screw head 132 of the fixing screw 130 hits the inner wall surface 56 </ b> A of the frame wall 56.

  As shown in FIG. 3, similarly, a screw hole 204 is formed in the mirror holder 200L that holds one end of the cylindrical mirror 202 in the longitudinal direction. The frame wall 55 is formed with a through-hole 220 that opens to the inner wall surface 55A and the outer wall surface 55B. Then, the fixing screw 230 is inserted into the through hole 220 from the inner wall surface 55 </ b> A side of the frame wall 55 and screwed into the screw hole 204 of the mirror holder 201, whereby the mirror holder 200 </ b> L is fixed to the outer wall surface 55 </ b> B of the frame wall 55. The The screw head 232 of the fixing screw 230 hits the inner wall surface 55 </ b> A of the frame wall 55. Although omitted from illustration and description, the mirror mirror holder 200R holding the other end in the longitudinal direction of the cylindrical mirror 202 is similarly fixed to the outer wall surface 57B of the frame wall 57 (see FIG. 1). ).

  As shown in FIG. 4, similarly, a screw hole 304 is formed in the sensor holder 300. The frame wall 57 is formed with a through-hole 320 that opens to the inner wall surface 57A and the outer wall surface 57B. Then, the sensor holder 300 is fixed to the outer wall surface 57B of the frame wall 57 by inserting the fixing screw 330 into the through hole 320 from the inner wall surface 57A side of the frame wall 57 and screwing it into the screw hole 304 of the sensor holder 300. The The screw head 332 of the fixing screw 330 hits the inner wall surface 57 </ b> A of the frame wall 57.

  Further, as shown in FIG. 1, the laser diode holder 100 is formed with an adjustment hole 106 used for position adjustment (described later). Similarly, an adjustment hole 206 is formed in the mirror holder 200R (the adjustment hole 206 is also formed in the mirror holder 200L), and an adjustment hole 306 is also formed in the sensor holder 300.

  The laser diode holder 100 (laser diode 102), the mirror holders 200R and 200L (cylindrical mirror 200), and the sensor holder 300 (photosensor 302) are adjusted in position, and the fixing screws 130, 230, and 330 are tightened. Fixed.

  Therefore, an assembly process for adjusting and fixing the positions of the laser diode holder 100 (laser diode 102), the mirror holders 200R and 200L (cylindrical mirror 200), and the sensor holder 300 (optical sensor 302) will be described next.

  First, the assembly process of the laser diode holder 100 (laser diode 102) will be described. As shown in FIG. 1, the X1 direction and the Y1 direction are orthogonal to each other, the X1-Y1 plane is a plane parallel to the frame wall 56, and the Z1 direction is a direction orthogonal to the X1-Y1 plane.

  The laser diode 102 is inserted into the laser diode holder 100. The laser diode 102 and the laser diode holder 100 are fixed by press-fitting or bonding.

  The laser diode holder 100 holding the laser diode 102 is disposed on the outer wall surface 56B side of the frame wall 56 of the optical box 50. The fixing screw 130 is inserted into the through hole 120 from the inner wall surface 56A side and screwed into the screw hole 104 of the laser diode holder 100 (see FIG. 2). At this time, the fixing screw 130 is not completely tightened, and the laser diode holder 100 is not temporarily fixed. The screw head 132 is on the inner wall surface 56 </ b> A side of the frame wall 56.

  As shown in FIG. 5, an adjustment pin 902 of a position adjustment jig (not shown) that can be finely moved in the X1 direction and the Y1 direction is inserted into the adjustment hole 106 of the laser diode holder 100. The light beam LA is emitted from the laser diode 102, and the laser diode holder 100 is moved in the X1 direction and the Y1 direction by the position adjusting jig so that the optical axis center of the light beam LA and the optical axis center of the collimator lens 14 coincide. Adjust the position. Since there is a gap between the through hole 120 and the fixed screw 130, the gap can be adjusted. When the beam characteristic of the light beam LA satisfies the target range, the position adjustment is completed.

  After the position adjustment is completed, the screw head 132 of the fixing screw 130 is rotated with a tool (not shown) such as a hexagon wrench, and the fixing screw 130 is tightened and fixed in the screw hole 104 of the laser diode holder 100 (also in FIG. 2). reference).

  Note that after the laser diode holder 100 is temporarily fixed, the laser diode 102 may be inserted into the laser diode holder 100 and fixed.

  Next, an assembly process of the mirror holders 200R and 200L (cylindrical mirror 200) will be described. As shown in FIG. 1, the X2 direction and the Y2 direction are orthogonal to each other, the X2-Y2 plane is a plane parallel to the frame walls 55 and 57, and the Z2 direction is a direction orthogonal to the X2-Y2 plane. Since the mirror holder 200R that holds one end of the cylindrical mirror 202 and the mirror holder 200L that holds the other end are the same except for the left and right objects, one and the other will be described without distinction. .

  The mirror holder 200 is arranged on the outer wall surfaces 55B and 57B side of the frame walls 55 and 57 of the optical box 50, and the fixing screw 230 is inserted into the through hole 220 from the inner wall surfaces 55A and 57A side to the screw hole 204 of the mirror holder 200. Screw together. At this time, the fixing screw 230 is not completely tightened and the mirror holder 200 is not temporarily fixed. The screw heads 232 are on the inner wall surfaces 55A and 57A side of the frame walls 55 and 57.

  Both ends in the longitudinal direction of the cylindrical mirror 202 are fixed to the mirror holder 200 by a fixing spring member 98 (see FIG. 3).

  Next, an adjustment pin (not shown) of a position adjusting jig (not shown) that can be finely moved in the X2 direction and Y2 direction and finely rotated about the Z2 axis is inserted into the adjustment hole 306 of the laser diode holder. While the light beam LA is emitted from the laser diode 102, the mirror holder 200 is moved in the X2 direction and the Y2 direction and rotated around the Z axis, so that the light beam LA scanned on the photosensitive drum 12 has a predetermined position. Adjust so that Since there is a gap between the through hole 220 and the fixing screw 230, the gap can be adjusted. When the position of the light beam LA satisfies the target range, the position adjustment is completed.

  After the position adjustment is completed, the screw head 232 of the fixing screw 230 is rotated with a tool (not shown) such as a hexagon wrench, and the fixing screw 230 is tightened into the screw hole 204 of the mirror holder 200 and fixed (see FIG. 3). .

  Note that the mirror holder 200 may be temporarily fixed after the cylindrical mirror 202 is held by the mirror holder 200.

  Next, an assembly process of the sensor holder 300 (optical sensor 302) will be described.

  The optical sensor 302 is inserted into the sensor holder 300. The optical sensor 302 and the sensor holder 300 are fixed by press-fitting or bonding.

  The sensor holder 300 holding the optical sensor 302 is arranged on the outer wall surface 57B side of the frame wall 57 of the optical box 50, and a fixing screw 330 is inserted into the through hole 320 from the inner wall surface 57A side. Screw together. At this time, the fixing screw 330 is not completely tightened, and the sensor holder 300 is not temporarily fixed. The screw head 332 is on the inner wall surface 57 </ b> A side of the frame wall 57.

  An adjustment pin (not shown) of a position adjustment jig (not shown) that can be finely moved in the X2 direction and the Y2 direction is inserted into the adjustment hole 306 of the sensor holder 300. The light beam LA is emitted from the laser diode 102, and the sensor holder 300 is moved in the X2 direction and the Y2 direction with the position adjusting jig so that the optical axis center of the light beam LB and the light receiving center of the optical sensor 302 are matched. Adjust the position. In addition, since there is a gap between the through hole 320 and the fixing screw 330, the gap can be adjusted. When the light receiving characteristics of the optical sensor 3002 satisfy the target range, the position adjustment is completed.

  After the position adjustment is completed, the screw head 332 of the fixing screw 330 is rotated with a tool (not shown) such as a hexagon wrench, and the fixing screw 300 is tightened into the screw hole 304 of the sensor holder 300 and fixed.

  In addition, after temporarily fixing the sensor holder 300, the optical sensor 302 may be inserted into the sensor holder 300 and fixed.

  Next, the operation of this embodiment will be described.

  As shown in FIGS. 1, 2, and 5, the fixing screw 130 is inserted into the through hole 120 of the frame wall 56 of the optical box 50 so that the screw head 132 contacts the inner wall surface 56 </ b> A of the frame wall 56. The laser diode holder 100 is fixed to the outer wall surface 56 </ b> B of the frame wall 56 by being screwed into the screw hole 104 of the diode holder 100.

  When fixed in this manner, the screw head 132 contacts the inner wall surface 56 </ b> A of the frame wall 56 and does not contact the laser diode holder 100. Therefore, even if the screw head 132 is turned with a tool and the fixing screw 130 is tightened, the rotation of the laser diode holder 100 due to the friction of the rotation of the screw head 132 is suppressed. Therefore, the positional deviation of the optical axis of the adjusted laser diode 102 is suppressed.

  The optical axis adjustment of the laser diode 102 is performed very precisely. Therefore, even a slight rotation of the laser diode holder 100 due to friction of rotation of the screw head 132 when tightening the fixing screw 130 is affected. Therefore, as in this embodiment, it is very effective to suppress the accompanying rotation.

  Similarly, as shown in FIGS. 1, 3, and 4, the screw heads 232 and 332 of the fixing screws 230 and 330 abut against the inner wall surfaces 55A and 57A of the frame walls 55 and 57, and the mirror holder 200 and the optical sensor holder. It does not contact 300. Therefore, even if the screw heads 232 and 332 are turned with a tool and the fixing screws 230 and 330 are tightened, rotation of the mirror holder 200 and the optical sensor holder 300 due to rotation friction of the screw heads 232 and 332 is suppressed. Therefore, the position shift of the position of the cylindrical mirror 202 and the light receiving position of the optical sensor 302 is suppressed.

  Similarly, the position of the cylindrical mirror 202 and the optical sensor 302 are adjusted very precisely. Therefore, as in this embodiment, it is very effective to suppress the accompanying rotation.

  Next, a modification of the above embodiment will be described. Only parts different from the above embodiment will be described.

  First, the first modification will be described.

  As shown in FIG. 6, by inserting the fixing screw 130 into the through hole 120 from the outer wall surface 56B side of the frame wall 56 and screwing it into the screw hole 152 of the laser diode holder 150 holding the laser diode 102, The laser diode holder 150 is fixed to the inner wall surface 56 </ b> A of the frame wall 56.

  The screw head 132 of the fixing screw 130 contacts the outer wall surface 56B of the frame wall 56 and does not contact the laser diode holder 150. Therefore, even if the screw head 132 is turned with a tool and the fixing screw 130 is tightened, the rotation of the laser diode holder 150 due to the friction of the rotation of the screw head 132 is suppressed.

  Next, a second modification will be described.

  FIG. 7 shows only one end side, but the other end is the same.

  The fixing screws 230 are inserted into the through holes 220 from the outer wall surfaces 55B and 57B side of the frame walls 55 and 57, and the screw holes of the mirror holders 250L and 250R holding the one end and the other end of the cylindrical mirror 202. The mirror holder 250 is fixed to the inner wall surfaces 55 </ b> A and 57 </ b> A of the frame walls 55 and 57 by being screwed to 252.

  The screw head 232 of the fixing screw 230 contacts the outer wall surfaces 55B and 57B of the frame walls 55 and 57, but does not contact the mirror holder 250. Therefore, even if the screw head 232 is turned with a tool and the fixing screw 230 is tightened, the rotation of the mirror holder 250 due to the friction of the rotation of the screw head 232 is suppressed.

  Next, a third modification will be described.

  As shown in FIG. 8, the fixing screw 330 is inserted into the through hole 320 from the outer wall surface 57 </ b> B side of the frame wall 57 and screwed into the screw hole 352 of the sensor holder 350 holding the optical sensor 302. The holder 350 is fixed to the inner wall surface 57 </ b> A of the frame wall 57.

  The screw head 332 of the fixing screw 330 contacts the outer wall surface 57B of the frame wall 57 and does not contact the sensor holder 350. Therefore, even if the screw head 332 is turned with a tool and the fixing screw 330 is tightened, the rotation of the sensor holder 350 due to the friction of the rotation of the screw head 332 is suppressed.

  The present invention is not limited to the above embodiment.

  For example, in the above embodiment, the laser diode holder 100, the mirror holders 200R and 200L, and the sensor holder 300 are all fixed by the two fixing screws 130, 230, and 30, but the present invention is not limited to this. There may be one fixing screw, or three or more fixing screws.

  For example, in the above-described embodiment, the cylindrical mirror 202 and the mirror holder 200 have been described as examples of the optical component and the optical component holding member. However, the present invention is not limited to this. Other mirrors used in the optical scanning device and mirror holders thereof may be used. Alternatively, a lens and a lens holder used in the optical scanning device may be used.

  For example, in the said embodiment, although demonstrated to the case where it fixes to the frame wall 54 (55-57) of an optical box as an example of a fixing | fixed part, it is not limited to this. The present invention can be applied even when it is fixed to another part of the optical scanning device. For example, you may fix to the site | part standing from the bottom face 52 or the frame wall 54. FIG.

1 is a perspective view schematically showing an optical scanning device according to an embodiment of the present invention. It is sectional drawing which shows the laser diode fixed to the frame wall of the optical box. It is sectional drawing which shows the mirror holder fixed to the frame wall of the optical box. It is sectional drawing which shows the sensor holder fixed to the frame wall of the optical box. It is a figure for demonstrating the position adjustment of a laser diode holder. It is sectional drawing of the laser diode which showed the 1st modification and was fixed to the frame wall of the optical box. It is sectional drawing of the mirror holder which showed the 2nd modification and was fixed to the frame wall of the optical box. It is sectional drawing of the sensor holder which showed the 3rd modification and was fixed to the frame wall of the optical box. The laser diode holder fixed to the conventional optical box is shown, (A) is a top view, (B) is sectional drawing.

Explanation of symbols

10 Optical scanning device
55 Frame wall (fixed part)
56 Frame wall (fixed part)
57 Frame wall (fixed part)
100 Laser diode holder (light source holding member)
102 Laser diode (light source)
104 Screw hole 120 Through hole 130 Screw 132 Screw head 150 Laser diode holder (light source holding member)
152 Screw hole 202 Cylindrical mirror (optical component)
200 Mirror holder (optical component holding member)
204 Screw hole 220 Through hole 230 Screw 232 Screw head 250 Mirror holder (optical component holding member)
252 Screw hole 300 Sensor holder (optical sensor holding member)
302 Optical sensor 304 Screw hole 320 Through hole 330 Screw 332 Screw head 350 Sensor holder (optical sensor holding member)
352 screw holes

Claims (6)

A light source holding member for holding a light source for emitting a light beam;
A screw hole provided in the light source holding member;
A fixing portion to which the light source holding member is fixed to one surface;
A through hole provided in the fixed portion;
A screw that is inserted into the through hole of the fixing portion so that a screw head contacts the other surface opposite to the one surface of the fixing portion, and is screwed into the screw hole of the light source holding member;
An optical scanning device comprising: An optical component holding member for holding the optical component;
A screw hole provided in the optical component holding member;
A fixing portion to which the optical component holding member is fixed to one surface;
A through hole provided in the fixed portion;
A screw that is inserted into the through-hole of the fixing portion so that a screw head contacts the other surface opposite to the one surface of the fixing portion, and is screwed into the screw hole of the optical component holding member;
An optical scanning device comprising: An optical sensor holding member that holds an optical sensor that receives the light beam;
A screw hole provided in the optical sensor holding member;
A fixing portion to which the optical sensor holding member is fixed to one surface;
A through hole provided in the fixed portion;
A screw that is inserted into the through-hole of the fixing portion so that a screw head contacts the other surface opposite to the one surface of the fixing portion, and is screwed into the screw hole of the optical sensor holding member;
An optical scanning device comprising: A light source holding member for holding a light source for emitting a light beam;
A screw hole provided in the light source holding member;
A fixing portion to which the light source holding member is fixed to one surface;
A through hole provided in the fixed portion;
A screw that is inserted into the through hole of the fixing portion so that a screw head contacts the other surface opposite to the one surface of the fixing portion, and is screwed into the screw hole of the light source holding member;
Have
A first step of temporarily fixing the light source holding member to the one surface of the fixing portion;
A second step of adjusting the position of the light source holding member and adjusting the optical axis of the light beam emitted from the light source;
A third step of fixing the light source holding member to the one surface of the fixing portion with the screw;
An assembly method of an optical scanning device, comprising: An optical component holding member for holding the optical component;
A screw hole provided in the optical component holding member;
The optical component holding member fixed to one surface is a fixing portion,
A through hole provided in the fixed portion;
A screw that is inserted into the through-hole of the fixing portion so that a screw head contacts the other surface opposite to the one surface of the fixing portion, and is screwed into the screw hole of the optical component holding member;
Have
A first step of temporarily fixing the optical component holding member to the one surface of the fixing portion;
A second step of adjusting the position of the optical component holding member;
A third step of fixing the optical component holding member to the one surface of the fixing portion with the screw;
An assembly method of an optical scanning device, comprising: An optical sensor holding member that holds an optical sensor that receives the light beam;
A screw hole provided in the optical sensor holding member;
A fixing portion to which the optical sensor holding member is fixed to one surface;
A through hole provided in the fixed portion;
A screw that is inserted into the through-hole of the fixing portion so that a screw head contacts the other surface opposite to the one surface of the fixing portion, and is screwed into the screw hole of the optical sensor holding member;
Have
A first step of temporarily fixing the optical sensor holding member to the one surface of the fixing portion;
A second step of adjusting the position of the optical sensor holding member and adjusting the light receiving position of the light beam of the optical sensor;
A third step of fixing the optical sensor holding member to the one surface of the fixing portion with the screw;
An assembly method of an optical scanning device, comprising:

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