JP4484496B2 - Mirror holding bracket, image reading device, image writing device, and manufacturing method of mirror holding bracket - Google Patents

Description

  The present invention relates to a mirror holding bracket, an image reading device, an image writing device, and a mirror that can hold the posture of a mirror that reflects optical information of an image to a predetermined position with high accuracy in a copying machine, a printer, a scanner device, and the like. The present invention relates to a method for manufacturing a holding bracket.

A so-called optical system mechanism in a copying machine, printer, scanner device, or the like is provided with a reflecting mirror for optically guiding image data to a predetermined position. Since reading and writing of images are performed based on the optical data reflected by the mirror, mechanical stability and reliability of the mechanism including the mirror are required. A device has been devised (for example, see Patent Document 1).
FIG. 16 is a perspective view of the periphery of a reflecting mirror in the main mechanism of an optical system in another conventional example. In the example shown in FIG. 16, two horizontally long plate-like mirrors 4, a first bracket 2 that holds one of the mirrors 4, a second bracket 1 that holds the other of the mirrors 4, and a first bracket 2, The main mechanism part of the optical system is configured by the stay member 3 that supports the second bracket 1.
The first bracket 2 and the second bracket 1 are formed by punching a metal plate into a predetermined shape by press working, and are provided with two substantially rectangular mirror insertion holes 2a and 1a into which one end of the mirror 4 is inserted. . The mirror insertion hole 2a of the first bracket 2 is formed with one convex portion 2b protruding toward the mirror 4 at a position corresponding to the center of the width of the mirror 4, and the mirror insertion hole 1a of the second bracket 1 has a mirror. Two protrusions 1b projecting toward the mirror 4 are formed at positions corresponding to both end portions of the width 4.
One end of the mirror 4 disposed in the mirror insertion hole 2a of the first bracket 2 is urged by a leaf spring (not shown) so as to abut against one convex portion 2b, and the mirror insertion of the second bracket 1 is performed. The other end of the mirror 4 disposed in the hole 1a is also urged by a leaf spring (not shown) so as to contact the two convex portions 1b. In other words, the mirror 4 is biased so as to come into contact with the three convex portions, so that a predetermined posture is maintained. On the other hand, the first bracket 2 and the second bracket 1 are fixed to the stay member 3 by burring caulking in this example as shown in FIG.
JP 09-321941 A

By the way, the mirror 4 and the bracket that holds the mirror 4 are important parts that affect the accuracy of the image. Therefore, the required accuracy such as the inclination and position of the mirror holding portion is very strict. It is necessary to strictly control the accuracy of the component parts by measuring the data accurately.
At present, in order to ensure the inclination and position of the carriage of the mirror holding portion, the target tolerance of the single part is set and processed. However, in recent years, the colorization of image data has progressed and remarkably high accuracy (for example, As shown in FIG. 18, the inclination of 0.025 and the position of 0.05) are required, so that the target tolerance of the single part greatly exceeds the processing limit of the pressed part.
For example, in the case of the flatness of the stay member, the total length is 330 mm or more, and generally, the flatness is 0.15 at 100 mm, and the flatness is about 0.5 in the case of this part. Although required, in order to satisfy the accuracy after assembly, it is necessary to make the flatness below 0.05.
In particular, as shown in FIG. 19, it is possible to prevent skew (diagonal image reading) and the like by minimizing the height (front-rear) deviation between the convex portion 2b of the first bracket 2 and the convex portion 1b of the second bracket 1 as shown in FIG. Are required from the viewpoint of product functions. This is because when the height difference is large, the mirror is attached obliquely, which causes a large skew.
In order to reduce the height difference as shown in FIG. 19 as much as possible, as shown in FIG. 20, the height of the convex portion is set by looking at the mirror insertion hole 1a of the second bracket 1 through the mirror insertion hole 2a of the first bracket 2. When compared, it is required that the height of one convex portion 2b of the first bracket and the two convex portions 1b of the second bracket be the same.
Here, since the number of convex portions is different between the first bracket and the second bracket, the shapes of the mirror insertion holes 2a and 1a are also different. Therefore, since both brackets are processed by separate molds, there is a difference in processing accuracy. That is, due to problems such as the accuracy of the processing machine, the difference in height between the three convex portions of both brackets is about ± 0.01 when compared by the method shown in FIG.

Also, since the mirror insertion hole and convex part are required to be in a predetermined place, processing is performed using a positioning reference, etc., but the mirror insertion from the processing reference pin provided on the mold The positional accuracy up to the punch for punching holes and the degree of clearance between the processing reference hole 7 on the bracket and the processing reference pin on the mold, etc., vary greatly depending on the set state of the processing machine and the difference in processing parts. (See FIG. 21).
In the case of an image reading device or an image writing device, component accuracy with a degree of inclination of about 0.025 and a degree of position of about 0.05 is required, and thus the component accuracy cannot be satisfied with the above-described degree of variation. For this reason, tolerance is satisfied using means such as additional machining after assembling, but in reality, many parts are discarded due to mistakes in additional machining.
In addition, since the mirror insertion hole of the first bracket has only one convex portion as a measurement point and the value varies greatly as shown in FIG. 22, the inclination and position are not actually measured. In the single item accuracy measurement, only the inclination and position of the second bracket are measured.
Therefore, the present invention has been made in consideration of the above-described circumstances, and even if there is only one convex portion that abuts and supports the mirror, it is possible to accurately measure the degree of inclination and the degree of position and processing accuracy. An object of the present invention is to provide a mirror holding bracket, an image reading device, an image writing device, and a method for manufacturing the mirror holding bracket.

In order to solve the above-described problems, in the invention described in claim 1, a mirror holding bracket for holding a reflecting mirror for optically guiding image data to a predetermined position, a part of which is attached to the mirror. The first bracket formed by removing the two convex portions from the member formed with the three convex portions that come into contact, and the one convex portion from the member molded from the same mold as the member. A second bracket formed by removing, the convex portions on both sides of the three convex portions in the member are removed to the root, and each of the positions where the removed convex portions are in a curved shape Forming the first bracket, forming the first bracket, removing the central convex portion of the three convex portions in the member to the base, and at the position where the removed convex portion was present. Form one or more curved recesses Molding the second bracket Te, holding the mirror in a predetermined posture by causing contact with the mirror and two of the convex portion of the second bracket and one of the convex portion of the first bracket the mirrors retention bracket and feature.

According to a second aspect of the present invention, there is provided a mirror holding bracket for holding a reflection mirror for optically guiding image data to a predetermined position, and three projections partially contacting the mirror A first bracket formed by removing the two convex portions from the member formed, and a first bracket formed by removing the one convex portion from the member molded from the same mold as the member. 2 brackets , among the three convex portions of the member, the convex portions on both sides are removed to the root , and polygonal concave portions having three or more corners are respectively provided at the positions where the removed convex portions are present. Forming the first bracket by forming one or more locations, removing the central convex portion of the three convex portions of the member to the base, and at least three corners at the position where the removed convex portion was present Forming one or more polygonal recesses Molding the second bracket, the mirror held in a predetermined posture by causing contact with the mirror and two of the convex portion of the second bracket and one of the convex portion of the first bracket the mirror holding bracket and feature.
Also, in the invention according to claim 3, a mirror holding bracket manufacturing method of holding a mirror for reflection to guide the image data to optically position, is brought into contact with a portion on the mirror Thus, the two convex portions on both sides are removed from the member formed with the three convex portions for holding the mirror in a predetermined posture to the root, and the curved shape is formed at each position where the removed convex portions are located. Forming the first bracket by forming one or more recesses, and removing the central convex part among the three convex parts in the member molded from the same mold as the member , the removed manufacturing method of mirror holding bracket by molding the second bracket by recesses formed above one location of the curved shape at a position where there is the protrusion and feature.
According to a fourth aspect of the present invention, there is provided a method of manufacturing a mirror holding bracket for holding a reflecting mirror for optically guiding image data to a predetermined position, a part of which is brought into contact with the mirror. Then, the two convex portions on both sides are removed from the member formed with the three convex portions for holding the mirror in a predetermined posture to the base, and each of the positions where the removed convex portions are located has three or more corners. The first bracket is formed by forming one or more polygonal concave portions, and the central convex portion among the three convex portions in the member formed from the same mold as the member is extended to the root. removed, the removed a method for manufacturing a mirror retaining bracket by molding the second bracket by recesses formed above one location of triangular or polygonal in a position that the convex portions and feature.
Also, in the invention according to claim 5, the image reading apparatus using the mirror holding bracket according to any one of claims 1 to 4, feature.
Further, in the invention described in claim 6, the image writing apparatus using the mirror holding bracket according to any one of claims 1 to 4, feature.

According to the present invention, since the three convex portions are formed after the molding of the member, it is possible to measure the position degree and the inclination degree with high accuracy one by one. In addition, since the first bracket and the second bracket are formed from the same member made of the same mold, the processing conditions are the same, and the height variation of the convex portion that abuts and supports the mirror can be suppressed. In addition, since the base of the convex portion is removed to form a curved or polygonal concave portion, for example, a movable region of the mirror at the time of mirror setting can be secured.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Examples 1 to 5 describe a mirror holding bracket according to an embodiment of the present invention and a manufacturing method thereof, Example 6 describes an image reading apparatus according to an embodiment of the present invention, and Example 7 describes the present invention. An image writing apparatus according to an embodiment of the invention will be described.

FIG. 1 is a component diagram of a mirror holding bracket 100 (Example 1) according to an embodiment of the present invention. The mirror holding bracket is used in a so-called optical system mechanism in an image reading apparatus or image writing apparatus, and is a bracket for holding a mirror that reflects optical image data at a predetermined position.
As shown in FIG. 1, the mirror holding bracket 100 has a first bracket 50 and a second bracket 51, and the brackets 50 and 51 are elongated rectangular reflections in a state of being opposed to each other in parallel at a predetermined interval. Two mirrors (not shown) can be held in this example. Therefore, substantially rectangular mirror insertion holes 50a, 50b, 51a, 51b are formed in both brackets, and both end portions of the mirror are inserted.
One convex portion 50c is formed on the portion corresponding to the inner wall of the mirror insertion hole 50a of the first bracket 50, and one convex portion 50d is formed on the portion corresponding to the inner wall of the mirror insertion hole 50b. Further, two convex portions 51c and 51d are formed on the portion corresponding to the inner wall of the mirror insertion hole 51a of the second bracket 51, and convex portions 51e and 51f are formed on the portion corresponding to the inner wall of the mirror insertion hole 51b. ing.
The mirror is held by being urged by an urging means (not shown) such as a leaf spring so that the mirror comes into contact with the convex portions 50c, 50d, 51c, 51d, 51e, and 51f. The first mirror is abutted and supported by the convex portions 50c, 51c and 51d, and the second mirror is abutted and supported by the convex portions 50d, 51e and 51f. Thus, if it supports by three points, the location which floats will disappear and it can support stably.
Thus, although the hole shape of the 1st bracket 50 and the 2nd bracket 51 differs, both brackets are shape | molded from the same member A. FIG. Each of the members A is obtained by stamping a metal plate with the same mold and punching it. As shown in FIG. 2, three convex portions are continuously provided inside the mirror insertion hole (including FIG. 2). In the drawings used in the following description, only the hole shape of the first bracket and the hole shape of the second bracket are shown side by side.

FIG. 3 is a plan view of the punch 13 for punching out the mirror insertion hole of the member. In this example, the punch 13 is processed using a wire cutting machine. The punch 13 has three concave portions formed in a wave shape, and three convex portions 55a, 55b, and 55c are formed on one side of the mirror insertion hole when punched. Since the three convex portions including the central convex portion 55a and the convex portions 55b and 55c on both sides thereof are formed at the same time under the same conditions, variation in the height of each convex portion can be minimized. .
In particular, compared to the case where the bracket having only the central convex portion and the bracket having only the two convex portions on both sides are separately molded, there is no influence due to the difference in the set state of the processing machine and the difference in accuracy of each processed part. Therefore, high-precision processing is possible. On the other hand, the shape of the die (not shown) is a shape offset by a certain clearance from the punch shape, and in this example is processed using a wire cutting machine. As an operation, punching is performed by lowering the punch 13 with the metal plate placed on the die.
When the second bracket 51 is formed from the member formed in this way, the two convex portions on the both sides are removed by removing the central convex portion from the three convex portions that are continuously provided. Protrusions are formed. A press machine is used to remove the convex portions. FIG. 4 is a plan view of the punch 15 for cutting and removing the central convex portion. In this example, the punch 15 is processed using a wire cutting machine. The shape of a die (not shown) corresponding to the punch 15 is a shape offset by a certain clearance from the punch shape, and is also processed using a wire cutting machine. As an operation, cutting is performed by lowering the punch 15 with the metal plate placed on the die. Since the cutting process here is only the cutting of the unnecessary protrusions, the other dimensional accuracy does not change.

The first bracket 50 is formed by the same processing method as that of the second bracket 51 using a punch and a die for cutting and removing the convex portions on both sides of the three convex portions provided in series. Thus, the 2nd bracket 51 and the 1st bracket 50 are shape | molded by the 1st step which shape | molds a member, and the 2nd step which removes a predetermined | prescribed convex part.
It is difficult to measure the degree of position and inclination with high accuracy if only one of the convex portions is removed, but three convex portions are formed after the molding of the member. Then, for example, the position degree and the inclination degree can be measured with high accuracy one by one using a three-dimensional measuring device. Further, since the first bracket and the second bracket are formed from the same member made of the same mold, the positional accuracy from the processing reference to the mirror holding shape punch and the processing reference hole 52 (see FIG. Since the conditions such as the degree of clearance of the processing reference pin on the mold with respect to 1) are the same, it is possible to suppress unevenness in the height of the convex portion.

Next, Example 2 will be described. FIG. 5 is a plan view showing hole shapes of the first bracket and the second bracket in the mirror holding bracket (Example 2) according to the embodiment of the present invention. In Example 2, as in Example 1, a first bracket having one convex portion and a second bracket having two convex portions are formed from a member processed by the punch 13 (FIG. 3). As shown in FIG. In the molding of the first bracket, the smooth portions 9, 9 that are flat so as to be lower than the convex portion 55a are formed there by removing the convex portions 55b, 55c on both sides of the three convex portions. In the molding of the bracket, the central convex portion is removed, and a flat smooth portion 9 lower than the convex portion is formed there.
A press machine is used to remove the convex portions. FIG. 6 is a plan view of the punch 16 for removing the central convex portion 55a and forming the smooth portion 9. FIG. The punch 16 is processed into a rectangular parallelepiped shape by a wire cut processing machine. In removing the convex part, it is sufficient that the height of the convex part is lower than that of the other convex part. Therefore, in the example of FIG. The shape of a die (not shown) corresponding to the punch 16 is a shape offset by a certain clearance from the punch shape, and is processed using a wire cutting machine. As an operation, cutting is performed by lowering the punch 16 with the metal plate placed on the die. Since the cutting process here is only the cutting of the unnecessary protrusions, the other dimensional accuracy does not change. With the two brackets configured in this manner, one mirror is abutted and held by three convex portions as in the first embodiment.
Therefore, in Example 2, since the three convex portions are formed after forming the member, at this time, for example, the degree of position and the inclination can be measured with high accuracy one by one using a three-dimensional measuring instrument. it can. Further, since the first bracket and the second bracket are formed from the same member made of the same mold, the positional accuracy from the processing reference to the mirror holding shape punch and the processing reference hole on the bracket (FIG. 1). Since the conditions such as the degree of clearance of the processing reference pin on the mold with respect to the reference) are the same, it is possible to suppress variations in the height of the convex portion.

Next, Example 3 will be described. FIG. 7 is a plan view showing hole shapes of the first bracket and the second bracket in the mirror holding bracket (Example 3) according to the embodiment of the present invention. In Example 3, as in Example 1, the first bracket having one convex portion and the second bracket having two convex portions are formed from the member, but as shown in FIG. The convex portions 55b and 55c on both sides of the central convex portion 55a are removed, and the concave portions 10 and 10 having a curved shape are formed therein so as to be lower than the convex portions, and in forming the second bracket, the central convex portion And a concave portion 10 having a curved shape lower than the convex portion is formed there. For forming the recess 10, a punch and die (not shown) having a shape corresponding to the curved shape in FIG. 7 are used in the same processing technique as in the first and second embodiments. Since the processing here is only the cutting of the unnecessary projections, the other dimensional accuracy does not change.
Thus, by removing the root of the convex portion to form the concave portion 10 having a curved shape, for example, a movable region of the mirror at the time of mirror setting can be secured. FIG. 8 shows a case where the small concave portions 10 having a curved shape are formed at a plurality of positions in this example, at two positions in this example. With the two brackets configured in this manner, one mirror is abutted and held by three convex portions as in the first embodiment.
Therefore, in Example 3, since the three convex portions are formed after the member is molded, at this time, for example, the position degree and the inclination degree can be measured with high accuracy one by one using a three-dimensional measuring instrument. it can. Further, since the first bracket and the second bracket are formed from the same member made of the same mold, the positional accuracy from the processing reference to the mirror holding shape punch and the processing reference hole on the bracket (FIG. 1). Since the conditions such as the degree of clearance of the processing reference pin on the mold with respect to the reference) are the same, it is possible to suppress variations in the height of the convex portion.

Next, Example 4 will be described. FIG. 9 is a plan view showing hole shapes of the first bracket and the second bracket in the mirror holding bracket (Example 4) according to the embodiment of the present invention. In Example 4, as in Example 1, the first bracket having one convex part and the second bracket having two convex parts are formed from the member, as shown in FIG. The convex portions 55b and 55c on both sides of the convex portion 55a are removed to form polygons in this example so that the convex portions 55b and 55c are lower than the convex portions, and in this example, the rectangular concave portions 11 and 11 are formed. The central convex portion is removed, and a rectangular concave portion 11 lower than the convex portion is formed there.
A press machine is used to remove the convex portions. FIG. 10 is a plan view of the punch 29 for removing the central convex portion and forming the concave portion 11. The punch 29 is processed into a block shape having a T-shaped cross section by a wire cutting machine. The shape of a die (not shown) corresponding to the punch 29 is a shape offset by a certain clearance from the punch shape, and is processed using a wire cutting machine. As an operation, cutting is performed by lowering the punch 29 with the metal plate placed on the die. Since the processing here is only the cutting of the unnecessary projections, the other dimensional accuracy does not change.
In this way, by removing the base of the convex portion and forming the concave portion 11 having a curved shape, it is possible to secure an operating region at the time of mirror setting, for example. Note that FIG. 11 shows a case where triangular concave portions 11 are formed at two locations in this example at a position where there is one convex portion, and FIG. 12 shows this example where multiple locations are provided at a position where there is one convex portion. Then, it is a case where the square-shaped small recessed part 11 is formed in two places. With the two brackets configured in this manner, one mirror is abutted and held by three convex portions as in the first embodiment.
Therefore, in Example 4, since the three convex portions are formed after the member is molded, at this time, for example, the position degree and the inclination degree can be measured with high accuracy one by one using a three-dimensional measuring instrument. it can. Further, since the first bracket and the second bracket are formed from the same member made of the same mold, the positional accuracy from the processing reference to the mirror holding shape punch and the processing reference hole on the bracket (FIG. 1). Since the conditions such as the degree of clearance of the processing reference pin on the mold with respect to the reference) are the same, it is possible to suppress variations in the height of the convex portion.

Next, Example 5 will be described. FIG. 13: is a top view which shows the hole shape of the 1st bracket and 2nd bracket in the mirror holding bracket (Example 5) which is embodiment of this invention. In Example 5, the first bracket with one convex part and the second bracket with two convex parts are formed from the member in the same manner as in Example 1, but as shown in FIG. In this example, the convex portions 55b and 55c on both sides of the convex portion 55a are bent at 90 ° to form the bent portions 12 and 12, and in forming the second bracket, the central convex portion is bent at 90 ° to bend the bent portion. 12 is formed.
This bending process is performed by pressing using a punch and die (not shown) processed by a wire cutting machine. As an operation, bending is performed by lowering the punch while the metal plate is placed on the die. Since the process here is only bending the unnecessary convex part, other dimensional accuracy does not change. In addition, although the case where it bent to 90 degrees was shown in this example, it is not limited to this, As long as it becomes lower than a convex part, you may decide a bending angle arbitrarily. With the two brackets configured in this manner, one mirror is abutted and held by three convex portions as in the first embodiment.
Therefore, in Example 5, since the three convex portions are formed after the molding of the member, at this time, for example, using a three-dimensional measuring device, the degree of position and the degree of inclination can be measured with high accuracy one by one. it can. Further, since the first bracket and the second bracket are formed from the same member made of the same mold, the positional accuracy from the processing reference to the mirror holding shape punch and the processing reference hole on the bracket (FIG. 1). Since the conditions such as the degree of clearance of the processing reference pin on the mold with respect to the reference) are the same, it is possible to suppress variations in the height of the convex portion.

Next, Example 6 will be described. FIG. 14 is a perspective view of a main part of an image reading apparatus 200 according to the embodiment of the present invention. The image reading apparatus 200 is an apparatus for optically reading image data of a document. As shown in FIG. 14, a mirror 22 for reflecting optical data of an image, a first bracket 20 for holding the mirror 22, and A second bracket 18 and a stay member 21 that supports both brackets are provided.
The first bracket 20 is provided with a mirror insertion hole 19 into which one end side of the mirror 22 is inserted, and the second bracket 18 is provided with a mirror insertion hole 17 into which the other end of the mirror 22 is inserted. One convex portion is formed inside the mirror insertion hole 19 by any of the processing methods shown in the first to fifth embodiments. Inside the mirror insertion hole 17, the first to fifth embodiments are used. Two convex portions are formed by any of the processing methods shown. These three convex portions hold the mirror 22 while abutting it.
Therefore, in Example 6, since the three convex portions are formed after the member is molded, at this time, for example, the position degree and the inclination degree can be measured with high accuracy one by one using a three-dimensional measuring instrument. it can. Further, since the first bracket and the second bracket are formed from the same member made of the same mold, the positional accuracy from the processing reference to the mirror holding shape punch and the processing reference hole on the bracket (FIG. 1). Since the conditions such as the degree of clearance of the processing reference pin on the mold with respect to the reference) are the same, it is possible to suppress variations in the height of the convex portion. As a result, the attitude of the mirror can be held with high accuracy, and high-precision image reading can be performed.

Next, Example 7 will be described. FIG. 15 is a perspective view of a main part of the image writing apparatus 300 according to the embodiment of the present invention. The image writing apparatus 300 is an apparatus that forms an image from image data using an optical writing means. As shown in FIG. 15, a first bracket that holds a mirror (not shown) that reflects the optical data of the image. 23, the second bracket 21, and stay members 25, 25 that support both brackets.
The image writing device 300 includes four mirrors. Therefore, the first bracket 23 is provided with four mirror insertion holes 24 into which one end of the mirror is inserted, and the second bracket 21 is provided with four mirror insertion holes 26 into which the other end of the mirror is inserted. ing. One convex portion is formed inside the mirror insertion hole 24 by any of the processing methods shown in the first to fifth embodiments, and inside the mirror insertion hole 26, the first to fifth embodiments are used. Two convex portions are formed by any of the processing methods shown. The three convex portions of the pair of mirror insertion holes 24 and the mirror insertion hole 26 into which the mirror is inserted hold the mirror while abutting the mirror.
Therefore, in Example 7, since the three convex portions are formed after the molding of the member, at this time, the position degree and the inclination degree can be measured with high accuracy one by one using, for example, a three-dimensional measuring instrument. it can. Further, since the first bracket and the second bracket are formed from the same member made of the same mold, the positional accuracy from the processing reference to the mirror holding shape punch and the processing reference hole on the bracket (FIG. 1). Since the conditions such as the degree of clearance of the processing reference pin on the mold with respect to the reference) are the same, it is possible to suppress variations in the height of the convex portion. As a result, the attitude of the mirror can be maintained with high accuracy, so that highly accurate image writing can be performed.

FIG. 3 is a component diagram of a mirror holding bracket 100 (Example 1) according to an embodiment of the present invention. The top view which shows the hole shape of a member. The top view which shows the hole shape when it punches with the top view of the punch 13, and the punch 13. FIG. The top view of the punch 15. FIG. The top view which shows the hole shape of the 1st bracket in the mirror holding bracket (Example 2) which is embodiment of this invention, and a 2nd bracket. The top view of the punch 16. FIG. The top view which shows the hole shape of the 1st bracket and 2nd bracket in the mirror holding bracket (Example 3) which is embodiment of this invention. The top view which shows the hole shape of the 1st bracket and 2nd bracket at the time of forming the recessed part 10 of a curved shape in the location where there existed one convex part. The top view which shows the hole shape of the 1st bracket in the mirror holding bracket (Example 4) which is embodiment of this invention, and a 2nd bracket. The top view of the punch 29. FIG. The top view which shows the hole shape of the 1st bracket and 2nd bracket at the time of forming the triangular recessed part 11 in two places in the position with one convex part. The top view which shows the hole shape of the 1st bracket and 2nd bracket at the time of forming the square-shaped recessed part 11 in two places in the position with one convex part. The top view which shows the hole shape of the 1st bracket and 2nd bracket in the mirror holding bracket (Example 5) which is embodiment of this invention. 1 is a perspective view of a main part of an image reading apparatus 200 according to an embodiment of the present invention. 1 is a perspective view of a main part of an image writing device 300 according to an embodiment of the present invention. The perspective view around the mirror for reflection in the main mechanism part of the conventional optical system. The top view of the stay member 3 which fixed the 1st bracket 2 and the 2nd bracket 1. FIG. The figure which shows the example of the required value of a degree of inclination and a position. The figure explaining the deviation of the height of the convex part of the 1st bracket and the convex part of the 2nd bracket. The top view at the time of comparing the height of a convex part from the 1st bracket side. The figure explaining the dispersion | variation in the processing precision when making the reference | standard hole 7 for a process into a reference | standard. The figure explaining the dispersion | variation in a measured value when there is only one convex part which is a measurement point.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 18, 21, 51 2nd bracket 2, 20, 23, 50 1st bracket 3, 25 Stay member 4, 22 Mirror 7, 52 Processing reference hole 9 Smoothing part 10, 11 Concave part 12 Bending part 13, 15, 16, 29 Punches 17, 19, 24, 26, 50a, 50b, 51a, 51b Mirror insertion holes 50c, 50d, 51c, 51d, 51e, 51f Convex part 100 Mirror holding bracket 200 Image reading device 300 Image writing device

Claims (6)

A mirror holding bracket for holding a reflection mirror for optically guiding image data to a predetermined position,
A first bracket formed by removing the two convex portions from a member in which three convex portions are partly in contact with the mirror;
A second bracket molded by removing one of the convex portions from the member molded from the same mold as the member;
Of the three convex portions of the member, the convex portions on both sides are removed to the base, and one or more curved concave portions are formed at each of the positions where the removed convex portions are located. Forming a bracket, removing the central convex portion of the three convex portions of the member to the base, and forming one or more curved concave portions at the position where the removed convex portion is located; 2 Mold the bracket,
A mirror holding bracket, wherein the mirror is held in a predetermined posture by bringing the mirror into contact with one convex portion of the first bracket and two convex portions of the second bracket. . A mirror holding bracket for holding a reflection mirror for optically guiding image data to a predetermined position,
A first bracket formed by removing the two convex portions from a member in which three convex portions are partly in contact with the mirror;
A second bracket molded by removing one of the convex portions from the member molded from the same mold as the member;
Of the three convex portions of the member, the convex portions on both sides are removed to the base, and one or more polygonal concave portions having three or more corners are formed at each position where the removed convex portions are located. Forming the first bracket, removing the central convex portion of the three convex portions of the member to the root , and forming a polygonal concave portion having three or more corners at the position where the removed convex portion is located. Form one or more locations to mold the second bracket ,
The mirror is held in a predetermined posture by bringing the mirror into contact with one convex portion of the first bracket and two convex portions of the second bracket. bracket. A method of manufacturing a mirror holding bracket for holding a reflecting mirror for optically guiding image data to a predetermined position,
The convex portions removed by removing the two convex portions on both sides to the root from a member formed with three convex portions that hold the mirror in a predetermined posture by bringing a part into contact with the mirror. The first bracket is formed by forming one or more curved concave portions at each of the positions where
Of the three convex portions in the member molded from the same mold as the member, the central convex portion is removed to the root, and one or more curved concave portions are provided at the position where the removed convex portion is located. A method of manufacturing a mirror holding bracket, wherein the second bracket is formed by forming. A method of manufacturing a mirror holding bracket for holding a reflecting mirror for optically guiding image data to a predetermined position,
The convex portions removed by removing the two convex portions on both sides to the root from a member formed with three convex portions that hold the mirror in a predetermined posture by bringing a part into contact with the mirror. Forming the first bracket by forming one or more polygonal concave portions of three or more corners at each of the positions where
Of the three convex portions in the member molded from the same mold as the member, the central convex portion is removed to the root, and a polygonal concave portion having three or more corners at the position where the removed convex portion is located. A method of manufacturing a mirror holding bracket, wherein the second bracket is formed by forming at least one portion . Image reading apparatus characterized by using a mirror holding bracket according to any one of claims 1 to 4. Image writing apparatus characterized by using a mirror holding bracket according to any of claims 1 to 4.

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