JP2591504Y2 - Retaining mirror holding structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical scanning device used for a laser beam printer or the like.

[0002]

2. Description of the Related Art For example, a laser beam printer is provided with an optical scanning device for outputting a scanning light beam modulated by print information, and scans a photosensitive member with a scanning light beam output from the optical scanning device. Printing information is being written to the photoconductor. The optical scanning device includes a light source, an optical deflector that scans and deflects the light beam output from the light source, and an fθ lens that constantly corrects a scanning speed of the scanning light beam scanned and deflected by the optical deflector on the photoconductor. Which are housed inside the housing.

In a laser beam printer, a scanning light beam, which has been corrected to a constant scanning speed by an fθ lens and is not used for scanning a photosensitive member, is detected inside a housing of an optical scanning device. Based on the timing, the timing to start writing the print information to the photoconductor is determined. For this purpose, a light detector and a reflection mirror for reflecting a scanning light beam not used for scanning the photoconductor toward the light detector are housed inside the optical scanning device.

If there is an error in the mounting angle of the reflecting mirror with respect to the housing, the optical path of the scanning light beam reflected by the reflecting mirror changes. When the optical path of the reflected scanning light beam changes, the timing at which the photodetector detects the reflected scanning light beam changes, and accordingly, the photodetector cannot detect the reflected scanning light beam. In addition, there arises such a problem that the timing at which the writing of the print information to the photoconductor by the scanning light beam is started is deviated. Therefore, conventionally, a cylindrical lens is provided between the reflection mirror and the photodetector to correct a change in the optical path of the scanning light beam after reflection due to an error in mounting the reflection mirror. Further, when the correction cannot be performed by the cylindrical lens, a spacer is further interposed between the reflection mirror and the housing.

[0005]

However, the conventional configuration described above has a disadvantage that an expensive separate part called a cylindrical lens is required, which leads to an increase in apparatus cost. In addition, the above problem also occurs in a device that includes a reflection mirror that reflects light, an image, and the like, and that causes various troubles in operation if there is an error in the mounting angle of the reflection mirror.

The present invention has been made in view of the above-mentioned problem, and provides a reflection mirror holding structure which can correct a mounting error of the reflection mirror at low cost without using an expensive separate part such as a cylindrical lens. The purpose is to:

[0007]

In order to achieve the above object, the present invention provides a structure in which a reflection mirror is held on a housing so that a reflection angle can be adjusted, and the housing is provided so as to face a reflection surface or a back surface of the reflection mirror. A front wall portion, a contact portion that contacts the reflection mirror at a portion of the front wall portion, an urging member that urges the reflection mirror toward the front wall portion, and a screw on the front wall portion. The contact portion is provided between a front wall portion where the screw member is screwed and a reflection mirror, and is provided at the front wall portion where the screw member is screwed. Is formed with a slit extending in the longitudinal direction of the screw in a state where the screw member is screwed into the front wall portion, and displaced in a direction intersecting with the longitudinal direction of the screw member by the screwing of the screw member. It is characterized by having such a configuration. Further, the invention is characterized in that the screw member includes a shaft portion and a head portion, and the shaft portion is formed with a tapered portion whose diameter increases toward the head portion.
In addition, the present invention provides a method in which the head of the screw member and a portion around the front wall portion where the screw member is screwed are engaged with each other by screwing of the screw member to displace the contact portion. An engaging portion to be formed is formed. Further, the present invention is a structure in which the reflection mirror is held on the housing so that the reflection angle can be adjusted, and the flexible mirror is erected at a predetermined height from the housing so as to face the reflection surface or the back surface of the reflection mirror. A flexible wall portion, a contact portion provided at a position facing the reflection mirror at a height end of the flexible wall portion so as to be able to contact the reflection mirror, and a flexible member separated from the housing. An arm extending in a direction intersecting with the direction in which the reflection mirror extends at the location of the elastic wall, an urging member for urging the reflection mirror in the contact portion direction, and penetrating the arm. A screw member screwed to the housing,
By the screwing of the screw member, the flexible wall portion is tilted in a direction in which the flexible wall portion separates and approaches from the reflection mirror via the arm portion,
This is characterized in that the contact portion is configured to move in a direction of moving away from and close to the reflection mirror. Further, the present invention is a structure in which the reflection mirror is held on the housing so that the reflection angle can be adjusted, and the flexible mirror is erected at a predetermined height from the housing so as to face the reflection surface or the back surface of the reflection mirror. A flexible wall portion, a contact portion provided at a position facing the reflection mirror at a height end of the flexible wall portion so as to be able to contact the reflection mirror, and a flexible member separated from the housing. Two arm portions extending in opposite directions to each other in a direction intersecting the direction in which the reflection mirror extends at the location of the elastic wall portion; an urging member for urging the reflection mirror in the contact portion direction; The housing includes two screw members that are respectively threaded through the two arm portions and screwed into the housing, and the flexible wall portion is moved away from the reflecting mirror through the respective arm portions by the screwing of the respective screw members. In the direction Part is characterized by being configured to move in a direction away from and closer from the reflection mirror.
Further, the present invention is characterized in that the portion of the flexible wall portion away from the housing is an end in the height direction of the flexible wall portion. Further, the present invention is characterized in that the portion of the flexible wall portion apart from the housing is an intermediate portion in the height direction of the flexible wall portion. Further, the present invention is a structure in which a reflection mirror is held on a mounting surface of a housing so that a reflection angle can be adjusted, and a pedestal holding the reflection mirror is screwed to the mounting surface of the housing and engaged with the pedestal. A base member extending along the mounting surface at a position distant from the mounting surface of the housing, and the mounting surface provided at one end of the substrate portion in the extending direction. A fulcrum that pivots in a direction parallel to the axis and swings in a direction perpendicular to the mounting surface and is coupled to the housing; and a holding portion that stands upright from a substrate portion near the fulcrum and holds the reflection mirror. A leg portion that is provided in a curved shape that can be elastically deformed at the other end of the substrate portion in the extending direction and elastically contacts the housing; and a substrate portion between the holding portion and the leg portion. Formation The screw member is provided at an end of the shaft portion, which penetrates the pedestal side engagement portion and is screwed to a mounting surface of the housing. A head which abuts on a board portion around the pedestal-side engaging portion and swings the board portion around the fulcrum portion in a direction orthogonal to a mounting surface by rotation of the screw member; and the pedestal-side engaging portion. And a screw member-side engaging portion for turning the substrate portion around the fulcrum portion in a direction substantially parallel to the mounting surface by rotation of the screw member. . Also, in the present invention, the pedestal-side engaging portion is formed by an elongated hole whose longitudinal direction is directed to the fulcrum portion, and the screw member-side engaging portion is formed around a portion deviated from the center of the shaft portion. And is formed of a cylindrical portion having an outer diameter that engages with the elongated hole. Also, the present invention
On the peripheral surface of the screw member side engaging portion, a convex portion protruding radially outward of the shaft portion and a concave portion recessed radially inward of the shaft portion are formed alternately in the circumferential direction of the shaft portion, The pedestal-side engaging portion is configured by a convex portion that comes into contact with the peripheral surface of the screw member-side engaging portion, and an elastic piece that urges the screw member-side engaging portion in the radial direction of the shaft portion. It is characterized by being. Also, the present invention provides a second leg portion extending from the substrate portion in a direction opposite to a direction in which the leg portion extends, and the substrate extending from the second leg portion. A second substrate portion extending substantially in parallel with the portion, the pedestal-side engaging portion is provided on at least one of the substrate portion and the second substrate portion, and the screw member is provided on the substrate. And the head is in contact with the second substrate portion, and the screw member side engaging portion is provided at a portion facing the pedestal side engaging portion. It is characterized by. Further, the present invention is a structure in which a reflection mirror is held on a mounting surface of a housing so that a reflection angle can be adjusted, and a pedestal holding the reflection mirror is screwed to the mounting surface of the housing and engaged with the pedestal. A base member extending along the mounting surface at a position distant from the mounting surface of the housing, and the mounting surface provided at one end of the substrate portion in the extending direction. A fulcrum that pivots in a direction parallel to the axis and swings in a direction perpendicular to the mounting surface and is coupled to the housing; and a holding portion that stands upright from a substrate portion near the fulcrum and holds the reflection mirror. A leg portion that is provided in a curved shape that can be elastically deformed at the other end of the substrate portion in the extending direction and elastically contacts the housing; and a substrate portion between the holding portion and the leg portion. Formation The screw member is composed of two members, a screw and a cap, and the screw has a shaft portion one end of which is screwed to a mounting surface of the housing; and A cap formed at the other end of the portion, wherein the cap has an upper portion abutting on a base portion around the pedestal side engaging portion, and a cap side engaging portion engaged with the pedestal side engaging portion. The screw is penetrated through the cap, the tip of which is screwed into the mounting surface of the housing, the cap has a base portion around the pedestal side engaging portion and a head of the screw. The screw is configured so that, by rotating the head, the substrate portion swings about the fulcrum portion in a direction orthogonal to the mounting surface, and the cap-side engaging portion By rotating the cap, the fulcrum Wherein the substrate portion as the center is configured to pivot the mounting surface and substantially a direction parallel to.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 17 is an explanatory diagram showing a schematic configuration of an optical scanning device to which the reflection mirror holding structure of the present invention is applied. In FIG. 17, reference numeral 1 denotes an optical scanning device, 2 denotes a photoconductor scanned by a scanning light beam B1 output from the optical scanning device 1, and the optical scanning device 1 outputs a light beam B0 modulated by print information. A semiconductor laser 11, a polygon mirror 12 that scans and deflects the light beam B0 into a scanning light beam B1, and fθ that constantly corrects the scanning speed of the scanning light beam B1 scanned and deflected by the polygon mirror 12 on the photosensitive member 2. A lens 13 and a housing 14 for accommodating the lenses 13 are provided.

As shown in FIG. 17, a housing 14 of the optical scanning device 1 is provided with a photosensitive member 2 by a scanning light beam B1.
A photodetector 15 for obtaining a timing to start writing print information to the photodetector 1 and a scanning light beam B1 not used for scanning the photoconductor 2 after passing through the fθ lens 13
A reflection mirror 16 that reflects light toward the light source 5 is housed and held.

Next, an embodiment of the present invention applied to the housing 14 holding the reflection mirror 16 shown in FIG. 17 will be described. First, the first embodiment will be described. FIG. 1 is a perspective view showing a holding structure of a reflection mirror according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line DD of FIG. The holding structure of the reflection mirror according to the first embodiment includes a wall 23 formed in the housing 14 and a screw member 24 screwed to the wall 23.
It is composed of

The wall 23 is provided on the rear surface 161 of the reflection mirror 16.
Flexible rear wall 231 located on the side (corresponding to the urging member)
And a positioning wall portion 232 for positioning the left and right sides of the reflection mirror 16 and the lower end of the reflection surface 162, and a cylindrical front wall portion 233 located in front of the reflection surface 162. The upper end of the rear wall portion 231 is located on the back surface 161 of the reflection mirror 16.
Of the reflecting mirror 16
Is biased in a direction in which the intermediate portion falls in the direction of the front wall portion 233 (forward).

The upper end 233a of the front wall 233 has
A slit 234 substantially parallel to the direction in which the reflection mirror 16 extends is formed, and a screw hole 235 into which the screw member 24 is screwed is formed at the center of the slit 234. Furthermore, the upper end 233a of the front wall portion 233 located closer to the reflection mirror 16 than the slit 234 (corresponding to a contact portion)
The portion contacts the upper end of the reflection surface 162 of the reflection mirror 16, and the vertical angle of the reflection mirror 16 is determined by this contact.

The screw member 24 includes a head 241 and a front wall 2
A shaft portion 242 screwed into the 33 screw holes 235;
A conical tapered portion 243 whose diameter increases toward the head portion 241 is formed at an upper portion of the shaft portion 242. In other words, in other words, the slit 234 is inserted into the screw member 24 while the screw member 24 is screwed into the screw hole 235.
Are formed so as to extend in the longitudinal direction. Therefore, by screwing the screw member 24, the engagement depth of the tapered portion 243 to the slit 234 changes, and accordingly, the slit 2
34, the upper end 233a of the front wall portion 233 is displaced in the front-rear direction (the direction intersecting the longitudinal direction of the screw member 24). Therefore, the reflection mirror 16 swings in the front-rear direction about the lower end of the reflection surface 162 abutting on the positioning wall portion 232, whereby the vertical reflection angle of the scanning light beam B1 reflected by the reflection surface 162 is adjusted. Is done.

FIG. 3 is a perspective view showing a holding structure of a reflection mirror according to a first modification of the first embodiment of the present invention, FIG. 4 is a sectional view taken along line EE of FIG. 3, and FIG. 5 is a line FF of FIG. It is sectional drawing. First
The reflection mirror holding structure according to the first modification of the embodiment includes a wall portion 25 formed on the housing 14 and a reflection mirror 16.
And a screw member 27 screwed to the wall 25.

The wall portion 25 is for accommodating the reflection mirror 16 and is integrally formed on the bottom surface 141 of the housing 14 by bulging. The wall portion 25 includes a side wall portion 251 for positioning the left and right sides of the reflection mirror 16, a rear wall portion 252 located at a rear portion away from the back surface 161 of the reflection mirror 16 by a predetermined distance, and the reflection of the reflection mirror 16. Face 162
And the first and second front wall portions 253 and 254 located in front of the front wall portion.

The first front wall 253 is formed at a height lower than the height of the reflection mirror 16. A contact portion 253a is formed at a side portion facing the reflection mirror 16 at the upper end of the first front wall portion 253, and the contact portion 253a is in contact with an intermediate portion of the reflection surface 162 of the reflection mirror 16. On the other hand, the second front wall 2
54 is formed at substantially the same height as the reflection mirror 16. A contact portion 254a is formed at the side of the upper end of the second front wall portion 254 facing the reflection mirror 16, and the contact portion 254a is formed.
4a is in contact with the upper end of the reflection surface 162 of the reflection mirror 16. The angles of the reflection mirror 16 in the left, right, up and down directions are determined by the contact of the contact portions 253a and 254a.

A slit 257a substantially parallel to the direction in which the reflecting mirror 16 extends is formed at a position on the upper end surface 255 of the first front wall 253 farther from the reflecting mirror 16 than the contact portion 253a. 1 Upper end surface 2 of front wall portion 253
A slit 257b substantially parallel to the direction in which the reflection mirror 16 extends is formed at a position 55 between the first front wall portion 253 and the side wall portion 251. Similarly, the second front wall 2
A slit 258a substantially parallel to the direction in which the reflection mirror 16 extends is formed at a position on the upper end surface 256 of the 54 that is farther from the reflection mirror 16 than the contact portion 254a, and the upper end surface of the second front wall portion 254 is formed. At a position 256 between the second front wall portion 254 and the side wall portion 251, a slit 258b substantially parallel to the direction in which the reflection mirror 16 extends is formed. And each slit 257a, 257b, 258
A screw hole 259 is formed at the bottom of each of a and 258b.

The leaf spring 26 (corresponding to an urging member) is disposed between the rear surface 161 of the reflection mirror 16 and the rear wall 252 of the wall 25.
Is biased in a direction in which its upper part falls in the direction of the first and second front wall portions 253 and 254 (forward). The screw member 27 includes a head portion 271 and a shaft portion 272, and a tapered portion 273 whose diameter increases toward the head portion 271 is formed in a portion of the shaft portion 272 near the head portion 271. .

Therefore, the slit 25 of the first front wall portion 253
By inserting the screw member 27 into the screw member 7a and screwing the shaft portion 272 thereof into the screw hole 259 and screwing the screw member 27, the engagement depth between the tapered portion 273 of the screw member 27 and the slit 257a changes. . As a result, the interval between the slits 257 a is enlarged and reduced, and the contact portion 253 a of the first front wall portion 253 that comes into contact with an intermediate portion of the reflection surface 162 of the reflection mirror 16 is changed to the reflection surface 162.
Following this, the intermediate portion of the reflection surface 162 of the reflection mirror 16 with which the contact portion 253a contacts moves in the front-rear direction by the urging of the leaf spring 26. When the screw member 27 inserted into the slit 257a is tightened, the intermediate portion of the reflection surface 162 of the reflection mirror 16 moves rearward, and when the screw member 27 is loosened, the reflection mirror 16
Of the reflection surface 162 moves forward.

Further, the slit 257 of the first front wall portion 253
b through the screw member 27, and insert the shaft portion 272 into the screw hole 2.
By screwing the screw member 27 by screwing the screw member 59, the engagement depth between the tapered portion 273 of the screw member 27 and the slit 257b changes. As a result, the interval between the slits 257b expands and contracts, and the contact portion 253a of the first front wall portion 253 that comes into contact with an intermediate portion of the reflection surface 162 of the reflection mirror 16 moves in a direction in which the contact portion 253a approaches and separates from the reflection surface 162. Contact part 2
The middle portion of the reflection surface 162 of the reflection mirror 16 with which the 53 a comes into contact is moved in the front-rear direction by the bias of the leaf spring 26.
When the screw member 27 inserted through the slit 257b is tightened, the middle part of the reflecting surface 162 of the reflecting mirror 16 moves forward, and when the screw member 27 is loosened, the middle part of the reflecting surface 162 of the reflecting mirror 16 moves backward. .

As described above, the screw member 27 is inserted into the slits 257a and 257b of the first front wall portion 253, the shaft portion 272 is screwed into the screw hole 259, and the screw member 27 is screwed. The reflection mirror 16 oscillates left and right around the upper end of the reflection surface 162 that comes into contact with the contact portion 254a of the front wall portion 254, so that the reflection angle of the scanning light beam B1 reflected by the reflection surface 162 in the left and right direction is changed. Adjusted.

Similarly, the slit 25 of the second front wall portion 254
8a, the shaft 272 is screwed into the screw hole 259 and the screw member 27 is screwed, so that the engagement depth between the tapered portion 273 of the screw member 27 and the slit 258a changes. . As a result, the interval between the slits 258a expands and contracts, and the contact portion 254a of the second front wall portion 254 that comes into contact with the upper end of the reflection surface 162 of the reflection mirror 16 moves in a direction in which the contact portion 254a approaches and separates from the reflection surface 162. , Contact part 25
The upper end of the reflecting surface 162 of the reflecting mirror 16 with which the mirror 4a contacts moves in the front-rear direction by the bias of the leaf spring 26. still,
When the screw member 27 inserted through the slit 258a is tightened, the upper end of the reflection surface 162 of the reflection mirror 16 moves rearward, and when the screw member 27 is loosened, the reflection surface 1 of the reflection mirror 16 is reduced.
The upper end of 62 moves forward.

The slit 258 of the second front wall 254
b through the screw member 27, and insert the shaft portion 272 into the screw hole 2.
By screwing the screw member 27 into engagement with the screw 59, the engagement depth between the tapered portion 273 of the screw member 27 and the slit 258 a changes. As a result, the interval between the slits 258b expands and contracts, and the contact portion 254a of the second front wall portion 254 that contacts the upper end of the reflection surface 162 of the reflection mirror 16 moves in a direction in which the contact portion 254a moves away from and approaches the reflection surface 162. , Contact portion 254
The upper end of the reflection surface 162 of the reflection mirror 16 with which a contacts
It moves in the front-rear direction by the urging of the leaf spring 26. When the screw member 27 inserted through the slit 258b is tightened, the upper end of the reflection surface 162 of the reflection mirror 16 moves forward, and when the screw member 27 is loosened, the upper end of the reflection surface 162 of the reflection mirror 16 moves rearward.

As described above, the screw member 27 is inserted into the slits 258a and 258b of the second front wall portion 254, the shaft portion 272 is screwed into the screw hole 259, and the screw member 27 is screwed. The reflection mirror 16 is arranged around an intermediate portion of the reflection surface 162 which comes into contact with the contact portion 253a of the front wall portion 253.
Swings in the vertical direction, whereby the vertical reflection angle of the scanning light beam B1 reflected by the reflection surface 162 is adjusted. As described above, in the reflection mirror holding structure of the first modified example, the horizontal and vertical reflection angles of the scanning light beam B1 reflected by the reflection surface 162 of the reflection mirror 16 can be adjusted as necessary. .

FIGS. 6A and 6B show the second embodiment of the first embodiment.
It is sectional drawing which shows a modification. The holding structure of the reflection mirror according to the second modification of the first embodiment includes a wall portion 28 formed on the housing 14 and a leaf spring 29 for urging the reflection mirror 16.
And a screw member 30 screwed to the wall portion 28.

The wall 28 is provided on the back surface 161 of the reflection mirror 16.
And a second wall portion 282 located at a front position away from the reflection surface 162 of the reflection mirror 16 by a predetermined distance, and the first and second wall portions 2 are provided.
81 and 282 are arranged on the side of the reflection mirror 16. The first wall portion 281 (corresponding to the front wall portion) is a reflection mirror 16
And are formed at substantially the same height. At the upper end of the first wall portion 281, a contact portion 281 a is formed which comes into contact with the upper end of the back surface 161 of the reflection mirror 16. At the lower end of the first wall portion 281, the contact portion 281 a contacts the lower end of the back surface 161 of the reflection mirror 16. The positioning part 281b which contacts is formed.

A slit 28 substantially parallel to the direction in which the reflecting mirror 16 extends is formed on the upper end surface of the first wall portion 281.
3 are formed, and a screw hole 284 is formed at the bottom of the slit 283. Further, a conical tapered portion 285 (corresponding to an engagement portion) whose diameter increases toward the upper end is formed at an upper end portion of the first wall portion 281 constituting the slit 283.

The leaf spring 29 (corresponding to an urging member) is provided between the reflecting surface 162 of the reflecting mirror 16 and the second wall 28 of the wall 28.
The leaf mirror 29 allows the reflection mirror 16 to be positioned at the center of the reflection surface 162 at the first wall portion 281.
It is biased in the direction of falling in the direction (rearward). The screw member 30 includes a head portion 301 and a shaft portion 302, and a tapered portion 303 (corresponding to an engagement portion) having a diameter increasing toward the head portion 301 is provided at a portion of the shaft portion 302 near the head portion 301. Are formed. The shaft portion 302 is screwed into the screw hole 284 of the first wall portion 281, and at this time, the tapered portion 303 of the screw member 30 engages with the tapered portion 285 of the slit 283.

Therefore, by screwing the screw member 30,
The depth of engagement between the tapered portion 303 of the screw member 30 and the tapered portion 285 of the slit 283 changes, and accordingly, the interval between the slits 283 expands and contracts, and the contact portion 281a that contacts the upper end of the rear surface 161 of the reflection mirror 16 reflects light. It moves in a direction away from and close to the mirror 16. Then, the upper end of the back surface 161 of the reflection mirror 16 is pressed by the leaf spring 29 so that the contact portion 2
The reflecting mirror 1 moves in the front-rear direction following the movement of the reflecting mirror 81 around the lower end of the back surface 161 of the reflecting mirror 16 which comes into contact with the positioning portion 281b of the first wall portion 281.
6 oscillates in the vertical direction, whereby the vertical reflection angle of the scanning light beam B1 reflected by the reflection surface 162 is adjusted.

FIGS. 7A and 7B are sectional views of the first embodiment.
FIG. 14 shows a holding structure of a reflection mirror according to a third modification of the embodiment. In the third modification, a configuration for moving the contact portion 281a is different from that of the second modification. That is, a semi-conical tapered portion 286 (corresponding to an engaging portion) whose diameter decreases toward the upper end is bulged at the upper end portion of the first wall portion 281 constituting the slit 283 with the slit 283 interposed therebetween. Is formed. The screw member 31 inserted into the slit 283 and screwed into the screw hole 284 is a head 3
11 and a shaft portion 312, a concave tapered portion 313 (corresponding to an engagement portion) whose diameter decreases toward the head portion 311 is formed on the lower surface of the head portion 311. The shaft portion 312 is screwed into the screw hole 284 of the first wall portion 281, and at this time, the tapered portion 313 of the screw member 31 is
Engage with the first tapered portion 286.

Therefore, by screwing the screw member 31,
The engagement depth between the tapered portion 313 of the screw member 31 and the tapered portion 286 of the first wall portion 281 changes, and accordingly, the interval between the slits 283 expands and contracts, and the contact portion abuts on the upper end of the rear surface 161 of the reflection mirror 16. 281a moves in a direction approaching away from the reflection mirror 16. Then, the upper end of the rear surface 161 of the reflection mirror 16 with which the contact portion 281a contacts moves in the front-rear direction by the bias of the leaf spring 29, and accordingly, the reflection mirror 1 with which the positioning portion 281b of the first wall portion 281 contacts.
The reflection mirror 16 swings up and down around the lower end of the back surface 161 of the sixth mirror 161, whereby the vertical reflection angle of the scanning light beam B 1 reflected by the reflection surface 162 is adjusted.

The screw member 3 shown in FIGS. 7 (a) and 7 (b)
1, instead of the tapered portion 28 as shown in FIG.
6 and a screw 33 with a truncated conical washer 32 having a concave tapered portion 321 (corresponding to an engaging portion) whose diameter decreases from bottom to top in FIG. May be used. In this case, the washer 32 and the screw 33 constitute a screw member.

Next, a second embodiment will be described. FIG.
FIG. 9 is a perspective view showing a reflection mirror holding structure according to a second embodiment of the present invention, and FIG. 9 is a side view thereof. The structure for holding the reflection mirror according to the second embodiment includes a wall portion 34 formed in the housing 14, a leaf spring 35 for urging the reflection mirror 16, and a screw member for attaching the leaf spring 35 to the wall portion 34. 36.

The wall 34 is provided on the bottom surface 14 of the housing 14.
It is swelled and formed in one piece. The wall portion 34 includes a rear wall portion 341 located at a rear portion away from the back surface 161 of the reflection mirror 16 by a predetermined distance, and the reflection surface 16 of the reflection mirror 16.
2 and a protruding portion 343 located in front of the flexible wall portion 342.

The flexible wall portion 342 is erected at a predetermined height from the bottom surface 141 of the housing 14, and the lower end of the flexible wall portion 342 contacts the lower end of the reflecting surface 162 of the reflecting mirror 16,
The distal end 34 of the L-shaped first arm 344 extending laterally from the upper end, which is the end in the height direction, of the flexible wall portion 342.
5 (corresponding to the contact portion) contacts the upper portion of the reflection surface 162,
The vertical angle of the reflection mirror 16 is determined by these abutments. In addition, a second arm 346 (corresponding to an arm portion) protrudes from the upper end of the flexible wall portion 342 in a direction (forward) intersecting with the direction in which the reflection mirror 16 extends, and the tip 347 of the second arm 346 protrudes. It faces above the upper end surface 348 of the 343 at a predetermined interval.

The leaf spring 35 (corresponding to an urging member) is disposed between the rear surface 161 of the reflection mirror 16 and the rear wall 341 of the wall 34.
Is biased in a direction in which its central portion falls in the direction of the flexible wall portion 342 (forward). The screw member 36 passes through the distal end 347 of the second arm 346 of the flexible wall portion 342 and is screwed to the upper end surface 348 of the projection 343.

Therefore, by screwing the screw member 36,
The tip 347 of the second arm 346 and the upper end face 3 of the projection 343
48, the flexible wall portion 342 flexes and tilts in a direction away from and close to the reflection mirror 16,
The position of the tip 345 of the first arm 344 moves in the front-back direction. Then, the upper part of the reflection surface 162 of the reflection mirror 16 is moved by the bias of the leaf spring 35 so that the distal end 3
45 moves in the front-rear direction following the movement of the reflecting mirror 45, and accordingly, the reflecting surface 1 of the reflecting mirror 16 abutting on the lower end of the front wall portion 342.
The reflection mirror 16 swings up and down about the lower end of 62, whereby the vertical reflection angle of the scanning light beam B1 reflected by the reflection surface 162 is adjusted.

FIG. 10 is a perspective view showing a reflection mirror holding structure according to a modification of the second embodiment. The reflection mirror holding structure according to this modification includes a wall portion 37 formed in the housing 14, a leaf spring 38 for urging the reflection mirror 16,
Screw members 39, 40, 41, 42 which penetrate the wall portion 37 and are screwed to the housing 14 side.

The wall 37 is provided on the bottom surface 14 of the housing 14.
It is swelled and formed in one piece. The wall portion 37 is composed of first and second flexible wall portions 371 and 372 located in front of the reflection surface 162 of the reflection mirror 16. The first flexible wall portion 371 is erected at a lower height than the reflection mirror 16. A contact portion 373 is formed at a side portion facing the reflection mirror 16 at an upper end which is an end portion in the height direction of the first flexible wall portion 371, and the contact portion 373 is located at an intermediate portion of the reflection surface 162 of the reflection mirror 16. Is in contact with

On the other hand, the second flexible wall portion 372 is erected at substantially the same height as the reflection mirror 16. A contact portion 374 is formed at the upper end of the second flexible wall portion 372 at a side surface facing the reflection mirror 16, and the contact portion 374 is formed on the reflection mirror 1.
6 is in contact with the upper end of the reflection surface 162. The contact between the contact portions 373 and 374 causes the reflection mirror 1 to move.
6 are determined in the left, right, up and down directions.

Further, a front arm 375 (corresponding to an arm portion) extending backward and forward in a direction intersecting the direction in which the reflecting mirror 16 extends is provided on the upper end of the first flexible wall portion 371.
And a rear arm 376 (corresponding to an arm portion) are protruded. Similarly, a forearm 377 (corresponding to an arm portion) extending backward and forward in a direction intersecting the direction in which the reflection mirror 16 extends is provided at an intermediate portion in the height direction of the second flexible wall portion 372. , A rear arm 378 (corresponding to an arm portion) is protruded.

The leaf spring 38 (corresponding to an urging member) is provided on the rear surface 161 side of the reflection mirror 16 and is provided on the rear surface 161.
The upper portion of the reflecting mirror 16 is urged by the leaf spring 38 in a direction in which the reflecting mirror 16 falls in the first and second flexible wall portions 371 and 372 (forward). The screw members 39 and 40 are connected to the front arm 375 of the first flexible wall portion 371.
And the rear arm 376, and the bottom surface 1 of the housing 14.
41 is screwed. Similarly, the screw members 41 and 42 are connected to the front arm 377 and the rear arm 37 of the second flexible wall portion 372.
8 and is screwed to the bottom surface 141 of the housing 14.

Therefore, by screwing the screw members 39 and 40, the distance between the front arm 375 and the rear arm 376 of the first flexible wall portion 371 and the bottom surface 141 of the housing 14 is changed, and the space is followed. The first flexible wall portion 371 bends and tilts in a direction to move away from the reflection mirror 16 and approach. Then, the position of the contact portion 373 of the first flexible wall portion 371 moves in the front-back direction, and the intermediate portion of the reflection surface 162 of the reflection mirror 16 follows the movement of the contact portion 373 by the bias of the leaf spring 38. To move back and forth.

For this reason, the reflecting mirror 16 swings left and right about the upper end of the reflecting surface 162 of the reflecting mirror 16 which comes into contact with the contact portion 374 of the second flexible wall portion 372, and is reflected by the reflecting surface 162. The reflection angle of the scanning light beam B1 in the horizontal direction is adjusted. At this time, when the screw member 40 is tightened, the intermediate portion of the reflection surface 162 of the reflection mirror 16 moves rearward, and when the screw member 39 is tightened, the intermediate portion of the reflection surface 162 of the reflection mirror 16 moves forward.

Similarly, by screwing the screw members 41 and 42, the distance between the front arm 377 and the rear arm 378 of the second flexible wall portion 372 and the bottom surface 141 of the housing 14 changes, and follows the distance. As a result, the second flexible wall portion 372 bends and tilts in a direction in which the second flexible wall portion 372 moves away from and close to the reflection mirror 16. Then, the position of the contact portion 374 of the second flexible wall portion 372 moves in the front-back direction, and the upper end of the reflection surface 162 of the reflection mirror 16 follows the movement of the contact portion 374 by the bias of the leaf spring 38. Move forward and backward.

For this reason, the reflecting mirror 16 swings up and down around the middle part of the reflecting surface 162 of the reflecting mirror 16 which comes into contact with the contact portion 373 of the first flexible wall portion 371,
The vertical reflection angle of the scanning light beam B1 reflected by the reflection surface 162 is adjusted. At this time, the screw member 4
When the screw 2 is tightened, the upper end of the reflecting surface 162 of the reflecting mirror 16 moves backward, and when the screw member 41 is tightened, the upper end of the reflecting surface 162 of the reflecting mirror 16 moves forward.

The positioning wall used in the first and second embodiments may be provided integrally with the front wall, or a plurality of front walls may be provided or a portion in contact with the reflection mirror may be provided. It can be omitted by changing the shape of the front wall.

Next, a third embodiment will be described. FIG.
1 is a plan view showing a holding structure of a reflection mirror according to a third embodiment of the present invention, and FIG. 12 is a sectional view taken along line GG of FIG.
The holding structure of the reflection mirror according to the third embodiment includes a pedestal 43.
And a screw member 44 for attaching the pedestal 43 to the housing 14.
It is composed of

The pedestal 43 is provided on the bottom surface 1 of the housing 14.
41 (corresponding to the mounting surface) and extend in parallel with an interval, in other words, the bottom surface 1 at a position away from the bottom surface 141.
41, a fulcrum portion 43 protruding from a lower surface on one end 432 side in the extending direction of the substrate portion 431.
3, a leg 435 that is curved toward the bottom surface 141 of the housing 14 at the other end 434 of the substrate portion 431 and elastically contacts the bottom surface 141, and stands upright on the one end 432 side of the substrate portion 431. And the holding unit 436.
At substantially the center of the substrate portion 431, the longitudinal direction is the fulcrum portion 4.
An elongated hole 437 (corresponding to a pedestal-side engaging portion) facing 33 is formed. The fulcrum portion 433 is fitted into a concave portion 142 formed on the bottom surface 141 of the housing 14, and extends in a direction substantially parallel to the bottom surface 141. It is pivotally connected and swingably coupled in a direction perpendicular to the bottom surface 141. A back surface 161 of the reflection mirror 16 is attached to a surface 438 of the holding portion 436 facing one end 432 of the substrate portion 431.

The screw member 44 has a head 441, a shaft 442 screwed into a screw hole 143 formed in the bottom surface 141 of the housing 14, and a shaft 442 formed above the shaft 442. And a column portion 443 (corresponding to a screw member side engaging portion) centered on a portion deviated from the center. The diameter of the cylindrical portion 443 is substantially the same as or slightly smaller than the width of the long hole 437 of the substrate portion 431. The diameter of the head portion 441 is larger than the width of the long hole 437. Is formed.

The screw member 44 is formed in the long hole 4 of the substrate portion 431.
The shaft portion 442 of the screw member 44 is screwed into the screw hole 143 of the bottom surface 141 of the housing 14. At this time, the cylindrical portion 443 of the screw member 44 is located in the long hole 437 of the substrate portion 431 and is engaged therewith. Further, the head 441 of the screw member 44 abuts on the upper surface of the substrate 431 around the long hole 437.

Therefore, by screwing the screw member 44,
The center of the column 443 moves eccentrically with respect to the center of the shaft 442, and the reflection mirror 16 is moved together with the substrate 431 to the fulcrum 43.
3, the scanning light beam B1 reflected by the reflecting surface 162 is adjusted in the left-right direction.

Further, by screwing the screw member 44, the height of the head 441 changes, whereby the other end 434 side of the substrate portion 431 follows the head 441 due to the elasticity of the leg portion 435, and the fulcrum portion The substrate portion 431 swings up and down around the center 433, and follows the swing of the substrate portion 431 to follow the reflection mirror 1.
6 swings up and down around the fulcrum 433. Thereby, the vertical reflection angle of the scanning light beam B1 reflected by the reflection surface 162 is adjusted. in this way,
In the structure for holding the reflection mirror of the third embodiment, the screw member 44 is used.
By the operation described above, the horizontal and vertical reflection angles of the scanning light beam B1 reflected by the reflection surface 162 of the reflection mirror 16 can be simultaneously adjusted as necessary.

FIG. 13 shows a reflection mirror holding structure according to a first modification of the third embodiment. In this first modification, a screw 45 comprising a head 451 and a shaft 452, and a head of the screw 45 are provided. The cap 46 fitted to the portion 451 is used.

The upper part 461 of the cap 46 has a concave part 461.
A is formed, and an engagement groove 462 for driver engagement is formed on the upper end surface. Also, the upper part 4 of the cap 46
A cylindrical portion 463 (corresponding to a cap-side engaging portion) is formed on the lower end surface of the cap 61 at a position deviated from the center of the cap 46, and the head portion 451 of the screw 45 has the concave portion 461A. The shaft portion 452 is inserted through the center of the cap 46, and its tip is screwed into a screw hole 143 in the bottom surface 141 of the housing 14. In addition, cylindrical part 4
The diameter of 63 is substantially the same as or slightly smaller than the width of the long hole 437 (corresponding to the pedestal side engaging portion) of the substrate portion 431. The diameter of the upper portion 461 of the cap 46 is the same as that of the long hole 437. It is formed with a diameter larger than the width of 437.

In the first modified example, when the tip of the driver is engaged with the engaging groove 462 of the cap 46 and the cap 46 is rotated, the center of the cylindrical portion 463 of the cap 46 becomes the center of the shaft 452 of the screw 45. , The reflecting mirror 16 is guided by the reflecting mirror 16 to rotate in the left-right direction about the fulcrum 433 together with the substrate 431, whereby the scanning light beam B 1 reflected by the reflecting surface 162 in the left-right direction is rotated. The reflection angle is adjusted. At this time, the cap 46
The screw 45 is not screwed even if is rotated.
The height of the head 451 does not change, and only the reflection angle in the left and right direction of the scanning light beam B1 reflected by the reflection surface 162 is changed.

The height of the head 451 is changed by screwing the screw member 45, whereby the other end 434 of the substrate 431 follows the vertical movement of the head 451 due to the elasticity of the leg 435. The substrate 431 swings up and down around the fulcrum 433, and the reflection mirror 16 swings up and down around the fulcrum 433 following the swing of the board 431. Thereby, the vertical reflection angle of the scanning light beam B1 reflected by the reflection surface 162 is adjusted. At this time, since the cap 46 is not rotated even if the screw 45 is screwed, the cylindrical portion 463 of the cap 46 does not move eccentrically.
Only the vertical reflection angle of the scanning light beam B1 reflected by the reflection surface 162 is changed.

In the first modification of the third embodiment, the screw 45 and the cap 46 constitute a screw member, and the screw 4
5 corresponds to the shaft of the screw member, and the cap 4
6 corresponds to the head of the screw member, and the cap 4
The sixth column 463 corresponds to the column of the screw member.

FIG. 14 and FIG. 15, which is a cross-sectional view taken along the line HH in FIG. 14, show a structure for holding a reflecting mirror according to a second modification of the third embodiment. An opening 431A is formed in the substrate portion 431 instead of the long hole 437, a projection 431B is provided on one side of the opening 431A, and an elastic piece 431C is extended on the other side to face the projection 431B. The screw member 47 used in the second modification includes a head 471 and a bottom surface 141 of the housing 14.
A shaft portion 472 screwed into a screw hole 143 formed in
A cam portion 473 (corresponding to a screw member side engaging portion) formed on an upper portion of the shaft portion 472 is formed.

The diameter of the head 471 of the screw member 47 is larger than the width of the opening 431A of the substrate portion 431, and a plurality of convex portions and concave portions are alternately formed on the peripheral surface of the cam portion 473. It is formed. The diameter of the cam portion 473 is formed to be slightly larger than the distance between the tip of the protrusion 431B of the substrate portion 431 and the elastic piece 431C.

In the second modified example, the screw member 47 is inserted into the opening 431A of the board portion 431, the shaft portion 472 is screwed into the screw hole 143 of the bottom surface 141 of the housing 14, and the cam of the screw member 47 is formed. The part 473 to the substrate part 431
In the opening 431A. Then, in this state, the peripheral surface of the cam portion 473 has the protrusion 431B and the elastic piece
When the cam portion 473 is rotated, the projection 431B follows the peripheral surface shape of the cam portion 473, and the substrate portion 431 turns left and right around the fulcrum portion 433.

According to the second modified example of the third embodiment, by screwing the screw member 47, the cam portion 473 of the screw member 47 causes the substrate portion 431 to move in the left-right direction about the fulcrum portion 433. The reflecting mirror 16 is guided by this to turn left and right around the fulcrum 433,
Thus, the horizontal reflection angle of the scanning light beam B1 reflected by the reflection surface 162 is adjusted.

Further, the height of the head 471 is changed by screwing the screw member 47, whereby the substrate 431 follows the head 471 and the fulcrum 433 due to the elasticity of the leg piece 435.
The reflection mirror 16 swings vertically about the fulcrum 433 following the swing of the substrate 431. Thereby, the vertical reflection angle of the scanning light beam B1 reflected by the reflection surface 162 is adjusted. As described above, in the reflection mirror holding structure of the second modified example, the operation of the screw member 47 requires the horizontal and vertical reflection angles of the scanning light beam B1 reflected by the reflection surface 162 of the reflection mirror 16. Can be adjusted accordingly.

In particular, according to the configuration of the second modified example, each time the screw member 47 is rotated once, the reflecting mirror 16 is rotated.
Oscillates back and forth multiple times in the left-right direction according to the number of irregularities of the cam portion 473 together with the substrate portion 431, so that the scanning light beam B
Screw member 47 for adjusting the reflection angle in the left-right direction of 1
Can be reduced, and the fluctuation amount of the reflection angle of the scanning light beam B1 in the vertical direction can be reduced accordingly. Therefore, when simultaneously adjusting the horizontal and vertical reflection angles of the scanning light beam B1 reflected by the reflecting surface 162 of the reflecting mirror 16 by the rotation of the screw member 47, the scanning light beam B1 is adjusted to the desired horizontal and vertical directions. Can easily be set to the reflection angle.

FIG. 16 shows a reflection mirror holding structure according to a third modification of the third embodiment. In this third modification, the other end 434 of the substrate section 431 is opposite to the leg piece 435. The second leg portion 439 having elasticity extends toward the second leg portion 439, and the second leg portion 439 extends in parallel with the second leg portion 439 above the substrate portion 431. Let me. Then, an elongated hole 439B similar to the elongated hole 437 is formed at a position facing the elongated hole 437 of the second substrate portion 439A, and the screw member 44 is inserted through the elongated holes 437 and 439B to form the screw member 44. The shaft 442 is connected to the housing 14.
Into the screw hole 143 of the bottom surface 141 of the
Is engaged with the long holes 437 and 439B.

According to the third modification of the third embodiment, as in the third embodiment shown in FIGS. 11 and 12, by screwing the screw member 44, the reflection mirror 16 is attached to the substrate portion. 4
31 is rotated left and right about the fulcrum portion 433 together with the fulcrum portion 433, and is swung in the vertical direction, so that the reflection angles of the scanning light beam B1 reflected by the reflection surface 162 of the reflection mirror 16 in the horizontal and vertical directions are required. Can be adjusted simultaneously.

In particular, according to the configuration of the third modification, the leg 435 and the second leg 439 are interposed between the head 441 of the screw member 44 and the bottom surface 141 of the housing 14. The reflecting mirror 16 swings in the vertical direction together with the substrate portion 431 following the head 441 with respect to the amount of vertical movement of the head 441 due to the screwing of the screw member 44.
Is reduced to an amount corresponding to the ratio of the spring constant between the leg piece 435 and the second leg piece 439. Therefore, the vertical reflection angle of the scanning light beam B1 reflected by the reflection surface 162 of the reflection mirror 16 can be adjusted more finely than in the configuration of the fifth embodiment.

Through the above-described first to third embodiments and the modifications thereof, the members arranged on the back surface 161 side of the reflection mirror 16 and the members arranged on the reflection surface 162 side are:
The arrangement may be reversed. In the present embodiment, the optical scanning device has been described as an example.However, the holding structure of the reflecting mirror of the present invention includes a reflecting mirror that reflects light, an image, and the like, and an error occurs in the mounting angle of the reflecting mirror. It is needless to say that the present invention can be applied to various devices that cause various problems in operation.

[0069]

As described above, according to the present invention, the reflecting mirror can be angled by a simple structure using a screw member, a wall formed using a housing, and a pedestal separate from the housing. It can be held in the housing in an adjustable manner, and expensive extra parts such as a cylindrical lens can be omitted, and the mounting error of the reflection mirror can be corrected at low cost.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of a holding structure of a reflection mirror according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line DD of FIG. 1;

FIG. 3 is a perspective view showing a schematic configuration of a first modification of the holding structure of the reflection mirror according to the first embodiment of the present invention shown in FIG. 1;

FIG. 4 is a sectional view taken along line EE of FIG. 3;

FIG. 5 is a sectional view taken along line FF of FIG. 3;

FIG. 6 is a sectional view showing a schematic configuration of a second modification of the holding structure of the reflection mirror according to the first embodiment of the present invention shown in FIG. 1;

FIG. 7 is a sectional view showing a schematic configuration of a third modification of the holding structure of the reflection mirror according to the first embodiment of the present invention shown in FIG. 1;

FIG. 8 is a perspective view showing a schematic configuration of a holding structure of a reflection mirror according to a second embodiment of the present invention.

FIG. 9 is a side view of the reflection mirror holding structure shown in FIG. 8;

FIG. 10 is a perspective view showing a schematic configuration of a modification of the holding structure of the reflection mirror according to the second embodiment of the present invention shown in FIG. 8;

FIG. 11 is a plan view illustrating a schematic configuration of a reflection mirror holding structure according to a third embodiment of the present invention.

FIG. 12 is a sectional view taken along line GG of FIG. 11;

FIG. 13 is a sectional view showing a schematic configuration of a first modification of the holding structure of the reflection mirror according to the third embodiment of the present invention shown in FIG. 11;

FIG. 14 is a plan view showing a schematic configuration of a second modification of the reflection mirror holding structure according to the third embodiment of the present invention shown in FIG. 11;

FIG. 15 is a sectional view taken along line HH of FIG. 14;

FIG. 16 is a sectional view showing a schematic configuration of a third modification of the holding structure of the reflection mirror according to the third embodiment of the present invention shown in FIG. 11;

FIG. 17 is an explanatory view showing a schematic configuration of an optical scanning device to which the reflection mirror holding structure of the present invention is applied;

[Description of References] 14 Housing 141 Housing bottom surface 16 Reflecting mirror 161 Reflecting mirror back surface 162 Reflecting mirror reflecting surface 26, 29, 35, 38 Leaf spring 233, 342 Front wall portion 231 Rear wall portion 233a Front wall upper end 234, 257a, 257b, 258a, 258b, 2
83 slits 235, 259, 284 screw holes 24, 27, 30, 31, 36, 39, 40, 41, 4
2,44,47 Screw member 241,271,301,311,441,471 Screw member head 242,272,302,312,442,452,4
72 Screw member shaft portion 243,273 Tapered portion 253 First front wall portion 253a, 254a, 281a, 373,374 Contact portion 254 Second front wall portion 281 First wall portion 285,286,303,313,321 Tapered portion 32 Washer 33 Screw 345 First arm tip 346 Second arm 375,377 Front arm 376,378 Rear arm 43 Pedestal 431 Board part 431B Convex part 431C Elastic piece 433 Support point part 435 Leg piece part 436 Holding part 437,439B Long hole 439 2 leg piece part 439A 2nd substrate part 443 cylinder part 45 screw 46 cap 461 cap upper part 463 cap cylinder part 473 cam part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G02B 7/18

Claims (12)

(57) [Scope of request for utility model registration] 1. A structure for holding a reflection mirror to a housing so that a reflection angle can be adjusted, comprising: a front wall formed in the housing so as to face a reflection surface or a back surface of the reflection mirror; A contact portion that contacts the reflection mirror at a portion thereof; an urging member that urges the reflection mirror toward the front wall portion; and a screw member that is screwed to the front wall portion. A slit is formed in the front wall portion where the screw member is screwed to the front wall portion and extends in a longitudinal direction of the screw, and the contact portion is formed by screwing the screw member. A reflecting mirror provided between the front wall portion and the reflecting mirror to be displaced in a direction intersecting the longitudinal direction of the screw member by screwing of the screw member. Holding structure. 2. The screw member comprises a shaft and a head,
The holding structure for a reflection mirror according to claim 1, wherein a tapered portion whose diameter increases toward the head is formed on the shaft portion. 3. The head of the screw member and a portion around the front wall portion where the screw member is screwed are engaged with each other by screwing of the screw member to displace the contact portion. The holding structure for a reflection mirror according to claim 1, wherein an engagement portion is formed. 4. A structure in which a reflection mirror is held on a housing so that a reflection angle can be adjusted, the flexible mirror being erected at a predetermined height from the housing so as to face a reflection surface or a back surface of the reflection mirror. A flexible wall portion; a contact portion provided at a position facing the reflection mirror at an end in a height direction of the flexible wall portion so as to be capable of contacting the reflection mirror; An arm portion extending in a direction intersecting the direction in which the reflection mirror extends at a location of a wall portion; an urging member for urging the reflection mirror in the contact portion direction; and a housing penetrating the arm portion And a screw member screwed into the flexible member is tilted in a direction in which the flexible wall portion separates and approaches from the reflection mirror via the arm portion by the screwing of the screw member,
Thereby, the contact portion is configured to move in a direction in which the contact portion moves away from and close to the reflection mirror. 5. A structure in which a reflection mirror is held on a housing so that a reflection angle can be adjusted, wherein the reflection mirror stands upright at a predetermined height from the housing so as to face a reflection surface or a back surface of the reflection mirror. A flexible wall portion; a contact portion provided at a position facing the reflection mirror at an end in a height direction of the flexible wall portion so as to be capable of contacting the reflection mirror; Two arm portions extending in opposite directions to each other in a direction intersecting the direction in which the reflection mirror extends at a wall portion; an urging member for urging the reflection mirror in the contact portion direction; A direction in which the flexible wall portion separates from and is approached to the reflection mirror via the respective arm portions by the screwing of the respective screw members. To the contact A structure for holding a reflecting mirror, wherein the touching portion is configured to move in a direction of moving away from and approaching the reflecting mirror. 6. The holding of the reflection mirror according to claim 4, wherein a portion of the flexible wall portion apart from the housing is an end in a height direction of the flexible wall portion. Construction. 7. The holding of the reflection mirror according to claim 4, wherein a portion of the flexible wall portion away from the housing is an intermediate portion in a height direction of the flexible wall portion. Construction. 8. A structure for holding a reflection mirror on a mounting surface of a housing so that a reflection angle can be adjusted, wherein a pedestal holding the reflection mirror is screwed to the mounting surface of the housing and is engaged with the pedestal. A screw member; and the pedestal, the board portion extending along the mounting surface at a location away from the mounting surface of the housing, and the mounting surface provided at one end of the board portion in the extending direction. A fulcrum that pivots in a parallel direction and swings in a direction perpendicular to the mounting surface and is coupled to the housing; a holding portion that stands upright from a substrate portion near the fulcrum and holds the reflection mirror; A leg portion elastically deformable provided at the other end of the substrate portion in the extending direction and elastically in contact with the housing; and a leg portion formed between the holding portion and the leg portion. Sa The screw member is provided at an end of the shaft portion, the shaft portion penetrating through the pedestal side engagement portion and screwed to a mounting surface of the housing, and A head that abuts on a substrate portion around the pedestal-side engaging portion and swings the substrate in a direction orthogonal to the mounting surface around the fulcrum by rotation of the screw member;
A screw member-side engaging portion provided at a portion facing the pedestal-side engaging portion and rotating the substrate portion around the fulcrum portion in a direction substantially parallel to a mounting surface by rotation of the screw member. A holding structure for a reflection mirror. 9. The pedestal-side engaging portion is formed by an elongated hole whose longitudinal direction is directed to the fulcrum portion, and the screw member-side engaging portion is centered on a portion deviated from the center of the shaft portion. 9. The holding structure of the reflection mirror according to claim 8, wherein the holding structure is formed of a cylindrical portion having an outer diameter engaged with the elongated hole. 10. On the peripheral surface of the screw member side engaging portion, a convex portion protruding radially outward of the shaft portion and a concave portion recessed radially inward of the shaft portion are formed in the circumferential direction of the shaft portion. The pedestal side engaging portion is formed alternately, the convex portion abutting on the peripheral surface of the screw member side engaging portion, and the elastic piece for urging the screw member side engaging portion in the radial direction of the shaft portion. 9. The method according to claim 8, wherein
The holding structure of the reflection mirror described in the above. 11. A second leg portion extending from the board portion in a direction opposite to a direction in which the leg portion extends, and the substrate portion extending from the second leg portion. A second substrate portion extending substantially in parallel with the base portion, the pedestal-side engaging portion is provided on at least one of the substrate portion and the second substrate portion, and the screw member is provided on the substrate portion. And the head portion abuts the second substrate portion while penetrating both the and the second substrate portion,
The said screw member side engaging part is provided in the part which faces the said pedestal side engaging part, The Claim 8, 9 or 10 characterized by the above-mentioned.
The holding structure of the reflection mirror described in the above. 12. A structure for holding a reflection mirror on a mounting surface of a housing so that a reflection angle can be adjusted, wherein the pedestal holding the reflection mirror is screwed to the mounting surface of the housing and engaged with the pedestal. A screw member; and the pedestal, the board portion extending along the mounting surface at a location away from the mounting surface of the housing, and the mounting surface provided at one end of the board portion in the extending direction. A fulcrum that pivots in a parallel direction and swings in a direction perpendicular to the mounting surface and is coupled to the housing; a holding portion that stands upright from a substrate portion near the fulcrum and holds the reflection mirror; A leg portion elastically deformable provided at the other end of the substrate portion in the extending direction and elastically in contact with the housing; and a leg portion formed between the holding portion and the leg portion. The screw member is composed of two members, a screw and a cap, The screw has a shaft portion one end of which is screwed to a mounting surface of the housing, and the shaft. A cap formed at the other end of the portion, wherein the cap has an upper portion that abuts on a substrate portion around the pedestal-side engaging portion, and a cap-side engaging portion that is engaged with the pedestal-side engaging portion. The screw penetrates the cap, the tip of which is screwed into the mounting surface of the housing, the cap is a substrate portion around the pedestal side engaging portion, the head of the screw, The screw is configured so that, by rotating the head, the substrate portion swings about the fulcrum portion in a direction orthogonal to the mounting surface, and the cap-side engaging portion By rotating the cap, A structure for holding a reflection mirror, wherein the substrate part is configured to pivot around a point part in a direction substantially parallel to a mounting surface.