JP4828838B2 - Manufacturing method of optical scanning device - Google Patents

Description

The present invention relates to the production how the optical scanning apparatus, and more particularly, to a method of attaching the optical element.

  In an image forming apparatus such as a copying machine, a printer, or a facsimile machine, an optical scanning device using a light beam such as a laser beam is one of devices for forming an electrostatic latent image on a photosensitive member used as a latent image carrier. It may be used (for example, Patent Documents 1 and 2).

In an optical scanning device, a light beam emitted from a light source is guided to a latent image carrier via an optical element using a scanning lens, a folding mirror, and the like, and spot irradiation is performed. These optical elements are housed and fixedly held in a casing whose inside is substantially sealed for dust prevention.

  In order to enable mass production at low cost, the optical scanning device uses a glass reinforced plastic housing in many cases. However, when the temperature inside the image forming apparatus rises during operation of the image forming apparatus, It is known that there is a risk of adversely affecting the optical scanning characteristics (for example, Patent Document 3).

  In other words, when a resin-reinforced product reinforced with glass is used as the housing of the optical scanning device and the frame of the image forming apparatus main body is an iron sheet metal member, heat is generated between the fastening points of the two. This causes a difference in the expansion amount, and the optical scanning device bends or deforms, causing the optical axis of the laser beam emitted from the optical scanning device to be deviated and degrading the image quality. was there.

  In addition, it is difficult to obtain the original characteristics of a resin mixed with glass fibers even after being pulverized and dissolved, and it is often impossible to recycle the material as the same optical housing. In addition, the mold for resin injection molding is provided with sliders in multiple directions and many nested divisions, making the mold structure complicated, lengthening the mold production period, and increasing the cost of molds and parts costs. End up.

In order to solve these problems, a method in which at least a part of the housing is made of iron sheet metal is conceivable.
Therefore, conventionally, as disclosed in Patent Document 3, the optical housing of the optical scanning device and the frame that supports the optical scanning device are made of the same material such as iron, and the temperature rise is eliminated by eliminating the difference in linear expansion coefficient. It has been proposed to prevent optical axis deviation by suppressing the distortion of the housing over time. Moreover, by using a housing made of an iron sheet metal member, it can be melted and made into a sheet metal again and regenerated as a material having the same characteristics.

  On the other hand, in the support portion of the optical element provided in the housing, in order to position the optical element, the optical element is pressed and urged in one direction by an elastic member so that positioning on the contact surface can be performed. Has also been proposed (for example, Patent Document 4).

JP-A-6-148553 (paragraph "0002" column) JP 10-232360 A (paragraph "0004" column) JP 2002-31369 A (paragraph “0080” column) Japanese Patent Laid-Open No. 10-136169 (paragraph “0012” column)

  Usually, as disclosed in Patent Document 3, when inserting a mirror, which is one of optical elements, through a hole formed in a sheet metal member used as a support member, a fitting allowance necessary for insertion is required. The holes are formed in a size larger than the original hole size corresponding to the optical element. For this reason, after the optical element is inserted and supported in the hole, a gap (blacked portion) is generated between the optical element A and the inner edge of the hole B as shown in FIG.

  The presence of such a gap becomes an intrusion portion of dust or dust from the outside, and dust or dust that has entered the optical housing, particularly toner such as toner from the developing device used in the image forming apparatus, enters the optical element. If it adheres to the surface, there arises a problem that the reflection characteristic, that is, the light amount of the light beam becomes smaller than a desired value.

As a configuration for solving such a problem, as disclosed in Patent Document 3, an optical scanning device including an optical element support member by further providing a side wall and a cover of a housing case outside the optical element support member. It is also possible to adopt a configuration in which the whole is covered from the outside.
However, in the case of such a configuration, the optical housing becomes very large, and there is a possibility that the downsizing that has been demanded in recent years cannot be achieved.

On the other hand, as a support structure of the optical element, both ends in the longitudinal direction of the optical element are inserted into the holes formed in the sheet metal members arranged to face each other, and the surface in the thickness direction of the optical element is brought into contact with the inner surface of the hole. In some cases, a configuration in which the optical element is held is used. However, when the optical element is inserted, if the optical surface (transmission surface or reflection surface) of the optical element comes into contact with the edge of the hole, there is a risk of scratching. Therefore, as shown in FIG. 11B, the optical surface of the optical element A (indicated by reference numeral A1 for convenience) and the edge of the hole B on the side where the surface abuts (indicated by reference numeral B1 for convenience) are in contact. In order to avoid this, it is conceivable to increase the size of the surface on the hole B side facing the optical surface A1 of the optical element A.
However, in the case of such a configuration, as shown by hatching in FIG. 11C, a large gap is formed between the optical element A and the side opposite to the edge B1 on the side where the optical element A abuts in the hole B. There is a gap, and dust intrudes easily from this gap. As a result, the problems due to the contamination of the optical element as described above cannot be solved yet.

  In view of the problems in the conventional optical scanning device described above, the present invention provides an optical scanning device capable of preventing image quality deterioration due to deterioration of optical characteristics by preventing dust from entering from the outside and preventing optical elements from being damaged. It is an object.

  Another object of the present invention is to provide an optical scanning device having a configuration that can prevent deterioration of optical characteristics by preventing damage to the optical surface of the optical element when the optical element is inserted and supported.

According to the first aspect of the present invention, a mirror, which is one of the optical elements, is obliquely inserted into insertion portions each formed by a hole provided in an opposing support surface in an optical box that houses the optical element. Inserting the other end of the mirror in the other of the opposing support surfaces by inserting one of the end portions in the longitudinal direction into the insertion portion of one of the opposing support surfaces and swinging it in an upright state. A method of manufacturing an optical scanning device having a structure that is inserted into and supported by a part,
The insertion part is
s: Hole width [mm] in a direction perpendicular to the light reflecting surface of the mirror
t1: Thickness [mm] in the direction perpendicular to the light reflecting surface of the mirror
t2: thickness of the member in which the hole is formed [mm]
L1: Mirror length [mm]
L2: When the distance between each member in which two holes are formed [mm],
s ≧ t2 × tan θ + t1 / cos θ
cos θ = (L2 + t2) / L1
Is set to a relationship shape, characterized in that for supporting the front Symbol mirror by assembling procedure for the oscillation of the longitudinal ends of the mirror to the inserted upright in the insertion portion at the same time the insertion portion It is said.

According to a second aspect of the present invention, in the method for manufacturing an optical scanning device according to the first aspect, at least one of the holes constituting the insertion portion corresponds to a range that is used as a light reflecting surface at least in the short direction of the mirror. It is characterized in that the portion is in a non-contact relationship with the mirror.

According to a third aspect of the present invention, in the method of manufacturing the optical scanning device according to the second aspect, the non-contact relationship with the mirror is set by a notch provided in a corresponding portion of the hole. It is said.

According to a fourth aspect of the present invention, in the method of manufacturing an optical scanning device according to any one of the first to third aspects, when the mirror is used as one of the optical elements, the inner surface of the hole or notch is formed. The contact surfaces of all the mirrors held by contact are reflection surfaces that reflect light.

According to a fifth aspect of the present invention, in the method of manufacturing an optical scanning device according to one of the first to fourth aspects, the gap between the hole or the notch provided in the hole and the optical element is: It is characterized by being filled with a gel-like substance having a liquid property that can be easily applied and a semi-solid property that has a viscosity that does not easily flow out after application.

According to the first aspect of the present invention, when inserting and supporting the mirror, which is one of the optical elements, in the hole provided in the opposing support surface, the mirror is skewed between the opposing support surfaces. By defining the width of the hole on the side where one end in the short direction (width direction) perpendicular to the thickness direction is inserted, the both ends in the longitudinal direction are set to each hole without obstructing the insertion of the mirror. Each can be inserted. This makes it possible to support the insertion of the mirror while making it difficult for the optical surface of the mirror to come into contact with the inner edge of the hole, unlike when inserting the mirror in the longitudinal direction from one hole to the other. In addition to improving the property, it is possible to suppress damage to the optical surface of the mirror.

According to the second and third aspects of the invention, since at least one of the holes used as the insertion portion of the optical element is in a non-contact relationship with the mirror, the portion used as the light reflecting surface in the mirror, It is possible to prevent damage to the light reflecting surface caused by contact with the inner surface of the hole. In the invention according to claim 5, as a non-contact relationship, a notch provided in the hole is used. Therefore, a portion for setting the non-contact relationship at the time of drilling is constructed without providing a special structure. It becomes possible to do.

According to the fourth aspect of the present invention, when the mirror is used as the optical element, the surface in contact with the hole or notch in all the mirrors is the reflective surface that reflects the light. Regardless of the difference, the reflecting surface can be positioned, and the positioning accuracy can be improved.

According to the fifth aspect of the present invention, the gap is closed by filling and applying the gel substance in the gap existing between the optical element and the hole or notch for inserting and supporting the optical element. As a result, it is possible to more efficiently prevent dust from entering through the gap, and it is possible to eliminate the presence of the gap so that there is almost no dust intrusion. It is possible to prevent the decrease.

According to the sixth aspect of the present invention, the contact state between the mirror and the hole or notch is set so that the direction of the location where the gel-like substance is applied to the mirror is the same side in all the mirrors. The workability at the time of applying and filling the gel substance to the mirror can be made consistent, and the gap can be efficiently eliminated.

According to the seventh and eighth aspects of the invention, image quality can be suppressed by preventing deterioration of optical characteristics due to dirt contamination of the optical element, and damage to the optical element that occurs during assembly of the optical element can be suppressed. It becomes possible to prevent deterioration of characteristics.

  The best mode for carrying out the present invention will be described below with reference to the illustrated embodiments.

  FIG. 1 shows an image forming apparatus in which an optical scanning apparatus according to an embodiment of the present invention is used. The image forming apparatus shown in FIG. 1 can be written by a laser beam from the optical scanning apparatus shown in FIG. It is a laser printer. The present invention is not limited to a printer as an image forming apparatus, but includes a copying machine, a facsimile machine, a printing machine, and an apparatus that combines these functions. Further, the laser printer shown in FIG. 1 has a configuration including a photoconductor as a single image carrier, but it is also possible to target a configuration capable of forming a multicolor image using a plurality of photoconductors. is there.

The laser printer 100 has a photoconductive photosensitive member formed in a cylindrical shape as a latent image carrier 111, a so-called photosensitive drum.
Around the latent image carrier 111, a charging roller 112 as a charging unit, a developing device 113, a transfer roller 114, and a cleaning device 115 are provided. The charging means is not limited to the above-described contact method, and a non-contact method in which an anti-static roller is brought close to each other with a minute gap or a non-contact method such as a corona charger can also be used.
On the other hand, an optical scanning device 200 that performs optical scanning with a laser beam LB is provided in the vicinity of the latent image carrier 111, and the exposure by optical writing is performed between the charging roller 112 and the developing device 113. Is supposed to do.
In FIG. 1, reference numeral 116 denotes a fixing device, reference numeral 118 denotes a cassette, reference numeral 119 denotes a registration roller pair, reference numeral 120 denotes a paper feed roller, reference numeral 121 denotes a conveyance path, reference numeral 122 denotes a discharge roller pair, reference numeral 123 denotes a tray, reference numeral P Indicates transfer paper as a recording medium.

  When image formation is performed in the laser printer shown in FIG. 1, the image carrier 111, which is a photoconductive photosensitive member, is rotated at a constant speed in the clockwise direction, and the surface thereof is uniformly charged by the charging roller 112. An electrostatic latent image is formed by exposure by optical writing of 200 laser beams LB. The formed electrostatic latent image is a so-called negative latent image, and the image portion is exposed. This electrostatic latent image is reversely developed by the developing device 113, and a toner image is formed on the image carrier 111.

The cassette 118 containing the transfer paper P is detachable from the main body of the image forming apparatus 100. When the cassette 118 is mounted as shown in FIG. The transfer paper P is fed in a state where the leading end of the transfer paper P is clamped by the registration roller pair 119.
The registration roller pair 119 feeds the transfer paper P to the transfer unit at the timing when the toner image on the image carrier 111 moves to the transfer position.
The transferred transfer paper P is superimposed on the toner image at the transfer portion, and the toner image is electrostatically transferred by the action of the transfer roller 114.

The transfer paper P to which the toner image is transferred is sent to the fixing device 116, where the toner image is fixed by the fixing device 116, passes through the conveyance path 121, and is discharged onto the tray 123 by the discharge roller pair 122.
The surface of the image carrier 111 after the toner image has been transferred is cleaned by a cleaning device 115 to remove residual toner, paper dust, and the like.

  FIG. 2 is a diagram showing the optical scanning device 200. In FIG. 2, the light beam emitted from the light source unit 201 is condensed in the sub-scanning direction by the cylindrical lens 202 and deflected and scanned by the polygon mirror 203. The deflected and scanned light beam passes through the first scanning lens 204 and the second scanning lens 205, the emission direction is changed by the two folding mirrors 206 and 207, and the latent image carrier 111 reaches the corresponding image plane 208. In the figure, reference numeral 211 denotes a synchronization detection means for detecting the image writing position.

  The second scanning lens 205 is held on the stay 212, and the stay 212 and the folding mirrors 206 and 207 are held so as to pass to the side plates 209 and 210.

  In the optical scanning device 200 according to the present embodiment, a sheet metal member is used for the bottom plate 200A, the front wall 214, the rear wall 213, and the side plates 209 and 210, and an optical box is configured by combining these sheet metal members. The front wall 214 and the rear wall 213 in the optical box are processed by bending the bottom plate 200A.

The present embodiment includes the following configuration as a support structure of an optical element in the optical scanning device 200 to be manufactured .
As described above, the lens and the mirror correspond to the optical element provided in the optical box. Among these optical elements, the mirror is used as a support structure for a mirror having a reflective surface that is easily affected by dust and dirt. Holes in the side walls 209 and 210 having opposing surfaces provided at positions that support both ends in the longitudinal direction (in FIG. 3, the mirror is indicated by reference numeral 207, and only the hole on the side wall 209 side is indicated by reference numeral 209A. And the elastic member 220 is used.

  The elastic member 220 is formed by processing a plate material and is configured by a plate spring having a substantially V shape in plan view, and is configured to be easily inserted from the outside to the inside of the hole 209 </ b> A. A cover piece 220A is provided in parallel with the cover piece 220A, and a protruding piece 220B is provided on one side where the cover piece 220A is provided.

In the elastic member 220, the height (h ₁ ) of the piece portion whose plan view is substantially V-shaped is somewhat lower (smaller) than the height (h ₀ ) of the hole 209A, and the covering piece 220A The height (h ₂ ) is higher (larger) than the height (h ₀ ) of the hole 209A. As a result, the cover piece 220A has most, or all, or most of the gap between the hole 209A and the mirror 207 when the elastic member 220 is inserted into the hole 209A from the outside to the inside of the hole 209A. Can be covered.

On the other hand, when the elastic member 209 is inserted into the hole 209A by projecting outward, the projecting piece 220B can hit the vicinity of the hole 209A, that is, the inner surface of the side wall 209 where the hole 209A is located. This prevents the elastic member 220 from being carelessly directed outward.
The width corresponding to the direction perpendicular to the height of the cover piece 220A is such that the other piece of the elastic member 220, that is, the mirror 207 can be pressed from the position where one piece of the elastic member 220 contacts one of the inner surfaces of the hole 209A. One part has a dimension that can cover the gap between the hole 209A and the mirror 207 that is formed on the opposite side to the contact side when the mirror 207 is brought into contact with the other inner surface of the hole 209A.

In the configuration as described above, as shown in FIG. 5A, the elastic member 220 is inserted into the mirror 207 that is in contact with one of the inner surfaces of the hole 209A. As shown, the mirror 207 is pressed toward one of the inner surfaces of the hole 209 </ b> A, and a gap (black portion) between the inner surface of the hole 209 </ b> A and the mirror 207 generated by the pressing is a covering piece of the elastic member 220. Covered by 220A. Thereby, intrusion of dust from the outside is suppressed.
In addition, when the elastic member 220 is inserted into the hole 209 </ b> A, the protruding piece 220 </ b> B abuts the tip of the elastic member 220 against the inner surface of the side wall 209.

In the above configuration , for all mirrors used in the optical scanning device 200 including the mirror 207 pressed by the elastic member 220 and abutting against the inner surface of the hole 209A, the abutting surface with respect to the hole reflects the light. It is set. As a result, even when all the mirrors have different thicknesses, the reflecting surface can be positioned accurately.

By the way, the mirror 207 is supported by inserting each end in the longitudinal direction toward the hole provided in the opposite side wall. However, if the contact frequency with the inner surface of the hole is high during insertion, the light reflecting surface is damaged. There is a risk of coming. In this embodiment, a configuration for eliminating such a problem during assembly of the mirror is provided. This configuration will be described below.
FIG. 6 is a diagram for explaining a conventional procedure for assembling the mirror 207. In FIG. 6, the mirror 207 is inserted into a hole 209A provided in one side wall 209, and is perpendicular to the side walls 209 and 210. The other end in the longitudinal direction is inserted into the hole 210A provided in the other side wall 210.
However, in this procedure, there is a possibility that the mirror 207 that moves while being inserted into the hole moves while the reflection surface thereof is rubbed against the inner surface of the hole 209A. In particular, when the light reflection area of the mirror 207 comes into contact with the inner surface of the hole, the reflection characteristics may deteriorate.

In this embodiment, a relationship is set such that a portion corresponding to a range used as a light reflecting surface in the mirror 207 is not in contact with the hole 209A.
FIG. 7 is a diagram showing this configuration. In FIG. 7A, a hole 209A is provided with a notch 209A1 at a position facing a portion corresponding to a range used as a light reflecting surface in the mirror 207. . In particular, the length t4 of the notch 209A1 (shown for convenience in FIG. 7 as the notch width) is the length of the range used as the light reflecting surface as shown in FIGS. 7A and 7B. The relationship is longer than t3 (t3 ≦ t4), and it is possible to maintain a state where there is absolutely no contact within the range used as the light reflecting surface.
Thereby, the part corresponding to the range used as a light reflection surface of the mirror 207 is in a non-contact state with the inner surface of the hole 209A, and damage due to contact at the time of insertion can be avoided. The configuration for setting the non-contact relationship is not limited to the shape of the hole 209 itself as described above. For example, although not shown, the light reflection surface is not damaged without reducing the light reflection efficiency. Inclusions having a rubbing resistance or hardness may be provided.

  In this embodiment, since the light reflecting surface of the mirror does not inadvertently come into contact with the inner surface of the hole when the mirror 207 is assembled, it is possible to prevent a decrease in the amount of reflected light from the mirror 207.

Next will be explained the assembly of the mirror used in the optical scanning apparatus practicing the method according to an embodiment of the present invention.
Depending on the length in the longitudinal direction of the mirror 207, when the assembly procedure as shown in FIG. 6 is used, if the mirror is moved while cantilevered outside the insertion start side wall 209, the insertion end side wall 210 is moved. It may be difficult to insert the hole 210A. In particular, the end in the longitudinal direction of the mirror 207 located on the side of the side wall 210 on the insertion end side is likely to be staggered depending on the length of the mirror, making it difficult to adopt the insertion position into the hole 210A and making it difficult to perform smooth assembly.

This embodiment is characterized in that such a problem is solved.
FIG. 8 is a diagram showing an assembling procedure of the mirror 207 according to the present embodiment. In this embodiment, the mirror 207 is skewed between the side walls 209 and 210 corresponding to the opposing surfaces, and the mirror is placed in the hole on one side wall. By inserting the longitudinal end of the mirror and then inserting the other longitudinal end of the mirror into the hole in the other side wall, the contact between the mirror and the hole is minimized.

  FIG. 8 (A) shows a state at the start of assembly in which the longitudinal end of the mirror is inserted into the hole, and the mirror 207 is disposed obliquely between the side walls. From this state, the mirror 207 is moved in a skewed state toward one of the side walls, in this case, the hole 209A formed in the side wall 209, and one end in the longitudinal direction is positioned with respect to the hole 209A. At that time, one end in the longitudinal direction is inserted into the hole 209A as shown in FIG.

Mirror 207 one longitudinal end is inserted into the hole 209A is Ji order to one end is inserted into the hole 209A awakened from skew state (see FIG. 8 (D)), the long-side direction other end side wall The other end in the longitudinal direction is inserted into the hole 210A of the other side 210 of the side wall (see FIG. 8E).
By adopting such a procedure, the mirror 207 is assembled with only the vicinity of the end portion in the longitudinal direction coming into contact with the inner surface of the hole 209A, and most of the longitudinal direction is not contacted.

  In the present embodiment, the width (s) of the hole 209A formed in the side wall 209 has a relationship described later in order to ensure that most of the longitudinal direction is not contacted when the mirror 207 is inserted. Is set.

That is, as an example of the case where the mirror 207 shown in FIG. 8 is used as the case where it is inserted into the hole 209A, the mirror 207 in the skew state shown in FIG. Whether or not it is possible to change to the standing state as shown in (2) depends on the width of the hole 209A into which one end in the longitudinal direction of the mirror 207 is inserted. In other words, it is necessary to set a dimension capable of simultaneously achieving insertion into the hole 209A and swinging of the mirror 207. Therefore, in order to obtain the width (s) of the hole 209A described above in FIG.
s: Hole width [mm] in a direction perpendicular to the light reflecting surface of the mirror
t1: Thickness [mm] in the direction perpendicular to the light reflecting surface of the mirror
t2: thickness of the member in which the hole is formed [mm]
L1: Mirror length [mm]
L2: When the distance between each member in which two holes are formed [mm],
s ≧ t2 × tan θ + t1 / cos θ
cos θ = (L2 + t2) / L1
The relationship is set.
In this embodiment, since the amount of movement in the longitudinal direction of the mirror moves within the hole only for each end, the light reflection of the mirror is different from the case where the entire longitudinal direction moves within the hole. Damage to the surface can be reduced. Moreover, when moving to migrate longitudinally the upright state from the movement in a skew state, not moved along the longitudinal direction, the width of the hole on the side where one longitudinal end is inserted provisions to Therefore, the insertion and the swinging to the standing state can be performed at the same time, thereby enabling the minimum contact state between the hole and the mirror. Such a minimum contact in the longitudinal direction of the mirror 207 can be achieved not only in the assembly procedure shown in FIG. 8 but also in the past by defining the width (s) of the hole 209A. Even when the longitudinal direction is moved along a direction perpendicular to the side wall, the contact probability is low, and the adverse effects caused by the contact can be reduced.

Next, a description will be given of a modified example related to the configuration for closing the gap existing between the hole and the mirror.
This variation has a liquid property that can be easily applied to a gap existing between the hole and the mirror, and a semi-solid property that has a viscosity that does not easily flow off after application. A gel-like substance is applied and filled so as to be blocked.

As the gel-like substance, for example, a silicone resin used as a sealant is selected, and is applied and filled in the gaps shown in FIG. 5A or FIG.
By using a gel-like substance, unlike UV curable adhesives with low viscosity, it does not flow out after application, and there is no need for work such as UV irradiation to prevent flow down immediately after application. As a result, the coating operation for closing the gap is facilitated.

  On the other hand, not only the case shown in FIG. 5 (A) or FIG. 11 (C) but also the case where the elastic member 220 shown in FIG. In this case, as shown in light black in FIG. 5 (B), a gel-like substance is applied and filled in a portion not covered by the elastic member 220, so that the hole 209A and the mirror are separated. It becomes possible to block all the gaps existing between them, and it is possible to completely prevent the intrusion of dust.

  In this modification, as shown in FIG. 10, when the case where three mirrors (shown by 2091, 2092, and 2093 for convenience) are supported by holes provided in the side walls is targeted, The mirror is brought into contact with the hole in such a direction that the portion to be coated with the material (shown by dots for convenience) is the same side in all the mirrors. Thus, as shown by the arrow F in FIG. 10, the application work for all the mirrors can be performed from above, and unlike the case where the application work is performed from different directions, the application workability is improved. Become.

1 is a diagram for explaining a configuration of an image forming apparatus including an optical scanning device according to an embodiment of the present invention. It is a top view which shows the outline of the whole structure of the optical scanning device by an Example of this invention. It is a figure which shows the support structure of the mirror used for the optical scanning device shown in FIG. It is a figure which shows the state which looked at the structure of the elastic member used for the support structure of the mirror shown in FIG. 3 from the direction shown with a code | symbol (4) in FIG. It is a figure for demonstrating the effect | action of the support structure shown in FIG. 3, (A) is the state in which the elastic member used for a support structure is not equipped, (B) is the state in which the elastic member was equipped. Show. It is a figure for demonstrating the prior art example regarding the assembly procedure of the mirror used for the optical scanning device shown in FIG. It is a figure for demonstrating the structure of the insertion part of the mirror used for the optical scanning device shown in FIG. It is a figure for demonstrating the procedure in the present Example regarding the assembly of the mirror shown in FIG. It is a figure for demonstrating the structure of the mirror insertion part in case the procedure shown in FIG. 8 is used. It is a figure for demonstrating the modification regarding the support structure of the mirror shown in FIG. It is a figure which shows the prior art example regarding the support structure of the mirror which is one of the optical elements.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Laser printer 200 Optical scanning device 207 Mirror 209,210 Side wall 209A, 210A Hole 209A1 Notch 220 Elastic member 220A Cover piece 220B Projection piece as a slip-off prevention means

Claims (6)

A mirror, which is one of the optical elements, is skewed in an insertion portion formed by a hole provided in each of the opposing support surfaces of the optical box that houses the optical element, and one of the end portions in the longitudinal direction of the mirror is A configuration in which the other end in the longitudinal direction of the mirror is inserted into and supported by the insertion portion provided on the other of the opposing support surfaces by being inserted into the insertion portion provided on one of the opposing support surfaces and swinging in an upright state. A method of manufacturing an optical scanning device comprising:
The insertion part is
s: Hole width [mm] in a direction perpendicular to the light reflecting surface of the mirror
t1: Thickness [mm] in the direction perpendicular to the light reflecting surface of the mirror
t2: thickness of the member in which the hole is formed [mm]
L1: Mirror length [mm]
L2: When the distance between each member in which two holes are formed [mm],
s ≧ t2 × tan θ + t1 / cos θ
cos θ = (L2 + t2) / L1
Is set to a relationship shape, characterized in that for supporting the front Symbol mirror by assembling procedure for the oscillation of the longitudinal ends of the mirror to the inserted upright in the insertion portion at the same time the insertion portion A method for manufacturing an optical scanning device. In the manufacturing method of the optical scanning device according to claim 1,
Manufacturing of an optical scanning device characterized in that the hole constituting the insertion portion is in a relationship in which at least a portion corresponding to a range used as a light reflecting surface in a short direction of the mirror is not in contact with the mirror Method. In the manufacturing method of the optical scanning device according to claim 2,
The non-contact relationship with the mirror is set by a notch provided at a corresponding portion of the hole, and the method for manufacturing an optical scanning device according to claim 1 . In the manufacturing method of the optical scanning device according to any one of claims 1 to 3,
When a mirror is used as one of the optical elements, the contact surfaces of all the mirrors held by contacting the inner surface of the hole or notch are used as reflection surfaces that reflect light. A method for manufacturing an optical scanning device. In the manufacturing method of the optical scanning device according to any one of claims 1 to 4,
The hole or the gap between the notch provided in the hole and the optical element has a liquid property that can be easily applied and a semi-solid property that has a viscosity that does not easily flow off after application. A method of manufacturing an optical scanning device, wherein a gel-like substance is filled and blocked. In the manufacturing method of the optical scanning device according to any one of claims 1 to 5,
The mirror, which is one of the optical elements, is in contact with the hole or the inner surface of the notch in a direction in which the portion where the gel substance is applied is the same side in all the mirrors. Manufacturing method of optical scanning device.

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