JPH03103814A - Device and method for attaching scanning optical device - Google Patents

Abstract

PURPOSE:To obtain a desired recording image by simple adjustment by providing a bearing surface on other part than a fitting part of the scanning optical device, adjusting an irradiated position by a light beam, based on this bearing surface as a reference, and attaching the scanning optical device to the object device after the adjustment. CONSTITUTION:A member 10 of a jig tool 9 being under a bearing surface 4b is moved vertically by setting a reference bearing surface 4a as the rotation center, and an adjustment is executed so as to make a scanning light parallel to an irradiated position of a desired light beam L. Subsequently, the member 19 of the jig tool being under a bearing surface 4c is moved vertically by setting as axis for connecting the bearing surface 4a and 4b as the rotation center, and the canning light being parallel to a desired scanning light is aligned with a desired position. Thereafter, a spacer 5 is engaged to a fitting hole formed in a fitting pedestal 3, and the spacer 5 is driven against the receiving surface 21 of the jig tool being at the same height as the receiving surface of a body side frame. Next, by enclosing an adhesive agent 13, the spacer 5 is fixed to the fitting pedestal 3. In such a way, the scanning optical device can be attached simply to the object device.

Description

[Detailed description of the invention] [Industrial use! lf1 The present invention relates to an apparatus and method for attaching a scanning optical device used in an image forming apparatus such as a laser beam printer.

2. Description of the Related Art Image forming apparatuses such as laser beam printers, which have become popular in recent years, are equipped with an internal scanning optical device that includes a light source, deflection means for deflecting and scanning the beam from the light source, and imaging means for the light beam. has been done. In such devices, when the light beam emitted from the scanning optical device is irradiated onto the photoreceptor drum, which is the scanned medium, if the photoreceptor drum and the scanning optical device are not installed in a proper positional relationship, the light beam will The image is scanned at a position on the photosensitive drum that is shifted from the desired position.

Therefore, conventionally, as shown in FIG.
A means for adjusting the irradiation position on the first photoconductor drum 2 is provided around the mounting portion 50 of the scanning optical device 1, and a large-diameter feed screw 51 is used to adjust the irradiation position on the photosensitive drum 2. The height of the scanning optical device l is adjusted from above, and the scanning optical device 1 is attached to the frame 7 from above the feed screw 51 using a Sems screw 53 containing a spring 52 to avoid rotation. ing.

[Problems to be Solved by the Invention] However, in such a conventional example, it is difficult to fix the feed screw 51, and it takes a considerable amount of time to adjust the height.

On the other hand, if the pitch of the feed screw 51 is made finer in order to improve the adjustment accuracy, not only will it be difficult to process the screw 51, but the time for height adjustment will also be longer.

Further, even if adjusting means other than the feed screw 5l is provided in the scanning optical device 1, a complicated mechanism is required, which increases the size of the scanning optical device 1, which is not preferable.

Therefore, in view of the above problems, an object of the present invention is to provide a device and method for more easily and accurately attaching a scanning optical device to a target device.

[Means for solving the problem] In the device according to the present invention for achieving the above object,
A seating surface is disposed on the scanning optical device, and by moving the seating surface up and down by a member in contact with the seating surface, the irradiation position of the scanning light emitted from the scanning optical device is adjusted. In order to install the device into a target device such as an image forming device, a movable member such as a mover is disposed on the scanning optical device, and after adjustment, the movable member fixed to the scanning optical device is fixed to the target device with screws, etc. By doing so, the scanning optical device is attached to the target device, or a seating surface is provided on the scanning optical device, and by touching the seating surface and moving the seating surface up and down, the scanning light emitted from the scanning optical device is A member for adjusting the light irradiation position is disposed within the target device, and a fixing means such as a screw for attaching the scanning optical device to the target device after adjustment is disposed.

In addition, in the mounting method according to the present invention to achieve the above object, the seating surface is moved up and down by a member disposed in the scanning optical device that comes into contact with the seating surface, and the irradiation position of the scanning light emitted from the scanning optical device is moved. and moving a movable member movably disposed on the scanning optical device in accordance with the adjustment;
After adjustment, the movable member is fixed to the scanning optical device, and the fixed movable member is fixed to the target device to attach the scanning optical device to the target device, or to attach the scanning optical device to the target device, or to attach the movable member to the scanning optical device. Adjust the irradiation position of the scanning light emitted from the scanning optical device by bringing a member installed in the device into contact with the seating surface and moving it up and down, and after adjustment, attach the scanning optical device to the target device using a fixing means. ing.

[Example] Embodiments of the present invention will be described below along with the drawings.

FIGS. 1(a) and 1(b) are views showing the back side of the scanning optical device 1 according to the first embodiment, respectively. Inside the scanning optical device 1, which directs the light beam to
A polygon mirror for deflecting and scanning the emitted light beam, a motor for rotationally driving the polygon mirror, and an imaging lens group for focusing the light beam L on the surface of the photoreceptor drum 2 are housed.

A mounting pedestal 3 protrudes from the scanning optical device l for attaching it to the main frame 7 of the image forming apparatus, and this pedestal 3 has a round hole into which a spacer 5, which is a movable member to be described later, is inserted. The fitting hole is open. On the back surface of the scanning optical device 1, three seating surfaces 4a, 4b, and 4c are provided, as shown in FIG. 1(b). The seat surface 4a is disposed near the pedestal 3 on the right front (upper right side) in FIG. ), and the seat surface 4c is located approximately at the optical center and at the rear of the scanning optical device l.

Here, the light beam from the scanning optical device I can be calculated by using FIG. 2(a), which shows the scanning optical device I in FIG. 1(a), as seen from the front, and FIG. A means and method for adjusting the irradiation position of L will be explained.

As shown in FIG. 2(a), the seat surface 4a protrudes slightly downward relative to the seat surfaces 4b and 4C, and the seat surface 4b and
Below 0 is an irradiation position adjustment jig 9 having a member 19 that is movable up and down.

First, by moving the member 19 of the jig 9 under the seat 4b up and down with the reference seat 4a as the rotation center, the scanning light can be adjusted to be parallel to the desired irradiation position of the light beam L. . Next, by moving the jig member l9 under the seat surface 4C up and down with the axis connecting the seat surfaces 4a and 4b as the center of rotation, the scanning light parallel to the above-mentioned desired scanning light can be aligned to the desired position. I can do it. These adjustments are the second
As shown in Figure (b), for example, a CCD line sensor 20 or the like is installed at a position corresponding to the surface of the photoreceptor drum.

After adjusting the irradiation position, the spacer 5 is engaged with the fitting hole formed in the mounting base 3, and the spacer 5 is pushed up to the receiving surface 21 of the jig 9, which is at the same height as the receiving surface of the main frame 7. guess.

A spiral groove 12 as shown in FIG. 3 is cut into this baser 5 so that an adhesive 13 can flow into it. Then, after the spacer 5 has been brought into contact with the reference position as described above, the adhesive 13 is sealed, thereby fixing the spacer 5 to the mounting base 3. Here, the groove 12 is formed so as to end in the middle of the pedestal 3 so that the adhesive 13 does not flow out onto the receiving surface 21 which is the reference position for attachment. Furthermore, even if a small amount of adhesive flows out, the spacer 5 is provided with a diameter of 22 to prevent the adhesive from adhering to the receiving surface 21, which is the reference position.

The spacer 5 is hollow, and as described above, the spacer 5
The scanning optical device 1, which has been adjusted and fixed to the pedestal 3, can be fixed to the main frame 7 with screws 6.

FIG. 4 shows a modification of the above embodiment, in which the mounting pedestal 2
3 has a fitting part 24 with the base plate 5 and an adhesive 1.
A gap 25 into which the number 3 enters is formed.

Because of this configuration, for example, when the left and right sides of the scanning optical device 1 have different heights as shown in FIG. However, if the gap 25 is set to absorb this inclination, the spacer 5 can always be fixed perpendicularly to the mounting seat surface. The fitting portion 24 is the center of rotation of this inclination, and also serves to prevent the adhesive from leaking downward. Further, the gap 25 is designed so that the adhesive l3 can easily wrap around the gap 25.

By the way, as a means for fixing the spacer 5, instead of carving a spiral groove etc. in the spacer 5, a means such as making a slot in the mounting base 3 and press-fitting the spacer 5 into this joint seat 3 and fixing it. May be used.

Next, a second embodiment will be explained. In the second embodiment shown in FIG. 5, the mounting pedestal 30 itself is moved up and down instead of the baser 5, and after adjustment, this is attached to the receiving surface 37 of the main frame 7.
It is configured to be fixed with screws 6.

The scanning optical device 1 is provided with adjustment seating surfaces 4a to 4c as in the first embodiment, and the irradiation position of the scanning light is also adjusted by the same means as the irradiation position adjustment tool 9. In this adjustment, the mounting pedestal 30, which is a movable member, is inserted into the vertical elongated hole or guide portion 3 formed in the pedestal 30.
1, it moves up and down with respect to the scanning optical device 1, so it moves up and down to the receiving surface 21 of the jig 9 (see Fig. 2), which is at the same height as the receiving surface 37 of the main frame 7. ,1
l Move the pedestal 30 and fix this pedestal 3b to the scanning optical device 1 with the screws 32.

After the adjustment is made in this manner, the pedestal 30 is fixed to the receiving surface 37 of the main frame 7.

The second embodiment further includes a rotatable fixing member 34 as shown in FIG. This fixing member 34 has a protruding part 34b protruding from a spherical part 34a, and is rotatable around the spherical part 34a, and is configured such that the screw 32 is inserted into the protruding part 34b. This is because when the optical frame of the scanning optical device 1 is molded of plastic (which is the case in many cases in recent years), if the mounting pedestal 30 has different heights on the left and right or front and back, the main frame 7 Pedestal 3
This is to prevent the optical frame from twisting when screwed in. If such twisting occurs, the positional accuracy of the imaging lens group and deflection means installed with high precision in the scanning optical device 1 will be disturbed.
2. A desired image cannot be obtained on the photosensitive drum 2. Therefore, the fixing member 34 of the rotatable screw 32 shown in FIG.
By arranging them, even if the positional relationship of the pedestals 30 differs from each other, the influence of this difference is absorbed by the rotation of the fixing member 34, so that twisting or the like does not occur in the optical frame or the like.

Note that the member 33 in FIG. 6 is a protruding portion 34 of a fixing member 34 in order to fix the mounting base 30 to a certain degree with respect to the scanning optical device l. This is a member made of a non-rigid material such as foam material or rubber and is provided so as to surround b. As a result, the rotation of the fixing member 34 is limited to some extent to achieve the above objective.

Also in the second embodiment configured as described above, the irradiation position of the scanning light can be easily adjusted.

By the way, in conventional scanning optical devices, even if the irradiation position of the scanning light is adjusted, the position and rotation of the reflecting mirror that guides the scanning light to the photoreceptor drum is adjusted when installed in the image forming apparatus. There is also the problem that the beam cannot be scanned to the desired position due to the installation accuracy of the direction, etc.
The third embodiment shown in the figure solves these problems.

In the third embodiment, similarly to the above-mentioned embodiments, the scanning optical device 1 is provided with seat surfaces 4a, 4b, and 4c as references, and the main body side frame 7 is provided with seat surfaces 4a, 4b, and 4c at positions below the seat surfaces 4b and 4c. A vertically movable member 47 is disposed, and a fixed protrusion 48 is formed at a position below the seat surface 4a.

Adjustment is performed as follows. After the scanning optical device 1 is mounted on the main body side frame 7, a CCD line sensor is installed at a position corresponding to the surface of the photosensitive drum 2 as in the above embodiment, and the scanning light L coming through the reflection mirror 40 is Adjustment work is performed while moving the member 47 up and down using means configured to detect the position of the member 47. This member 47 that moves up and down
A screw member such as a passe screw may be used.

After adjusting in this manner, the scanning optical device is fixed using a screw 43 as a fixing means with an elastic member such as a subring 42 interposed therebetween. 1 is fixed to the frame 7 on the main body side.

With this configuration, even if the mounting viscosity of the reflection mirror 40 is not good or if the main frame 7 holding the scanning optical device 1 and the photosensitive drum 2 is deformed, the scanning light L Since all the irradiation positions can be adjusted at once, a desired recorded image can be obtained with simpler adjustment.

[Effects of the Invention] As explained above, according to the present invention, a seating surface is provided at a location other than the mounting portion of the scanning optical device, the irradiation position of the light beam is adjusted with this seating surface as a reference, and the irradiation position of the light beam is adjusted after adjustment. maintain this adjusted state by interposing a member around the scanning optical device, or perform the adjustment described in (h) using an adjustment mechanism installed in the target device such as an image forming device using the seating surface of the scanning optical device as a reference. Since the scanning optical device is directly attached to the target device using the fixing means after adjustment, it is possible to more easily obtain an ideal recorded image.

[Brief explanation of drawings]

1(a) and (b) are respectively schematic configuration diagrams of a first embodiment of the present invention, and FIGS. 2(a) and (b) are respective irradiation positions of scanning light in the first embodiment. Figure 3 is an enlarged view of the spacer and attachment part of the first embodiment, Figure 4 is an enlarged view of the attachment member of a modified example, and Figure 5 is an enlarged view of the attachment member of the modified example.
The drawings are for explaining the second embodiment, FIG. 6 is for explaining the fixing member of the second embodiment, FIG. 7 is for explaining the third embodiment, and FIG. 8 is for explaining the fixing member of the second embodiment. It is a figure showing a conventional example. 1...Scanning optical device, 2...Photosensitive drum, 3, 23, 30...Mounting base, 4a to 4c
... Seat surface, 5 ... Spacer, 6, 32, 4
3...Screw, 7...Body side frame, 9...
...Jig and tool, 34...Fixing member, 47...
...Movable member 16 r0 U

Claims (1)

[Claims] 1. A seating surface is disposed in the scanning optical device, and the irradiation position of the scanning light emitted from the scanning optical device is adjusted by moving the seating surface up and down by a member that comes into contact with the seating surface. A movable member is movably disposed on the scanning optical device in order to mount the scanning optical device in the target device according to this adjustment, and after adjustment, the movable member fixed to the scanning optical device is fixed to the target device. A device for attaching a scanning optical device, characterized in that the scanning optical device is attached to the target device. 2. Adjust the irradiation position of the scanning light emitted from the scanning optical device by moving the seat up and down using a member that comes into contact with the seat provided on the scanning optical device, and move the scanning optical device according to this adjustment. A scanning optical system characterized in that the scanning optical device is attached to the target device by moving a disposed movable member, fixing the movable member to the scanning optical device after adjustment, and fixing the fixed movable member to the target device. How to install the device. 3. A seat is disposed in the scanning optical device, and a member is disposed in the target device that adjusts the irradiation position of the scanning light emitted from the scanning optical device by abutting against the seat and moving the seat up and down. A device for attaching a scanning optical device, characterized in that a fixing means for attaching the scanning optical device to the target device after adjustment is provided. 4. Adjust the irradiation position of the scanning light emitted from the scanning optical device by moving the seat disposed on the scanning optical device up and down with a member disposed on the target device in contact with the seat; A method for attaching a scanning optical device, comprising attaching the scanning optical device to the target device using a fixing means after adjustment.