JPH06110002A - Plastic rotating polygon mirror - Google Patents
Plastic rotating polygon mirrorInfo
- Publication number
- JPH06110002A JPH06110002A JP28252092A JP28252092A JPH06110002A JP H06110002 A JPH06110002 A JP H06110002A JP 28252092 A JP28252092 A JP 28252092A JP 28252092 A JP28252092 A JP 28252092A JP H06110002 A JPH06110002 A JP H06110002A
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- JP
- Japan
- Prior art keywords
- main body
- mirror
- central axis
- mirror surface
- measured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
(57)【要約】
【目的】 径方向の肉厚の収縮量の不均一による鏡面の
平面度の低下を防ぐことのできるプラスチック製回転多
面鏡を実現する。
【構成】 正多角柱状の本体１は中央に略円形の軸穴２
を有し、側面１ａには互に隣接する複数の鏡面３〜８が
設けられている。軸穴２の内面２ａには、本体１の中心
軸Ｃ1 から各鏡面３〜８の両端の稜角３ａ〜８ａのそれ
ぞれへ向う放射線３ｂ〜８ｂ（放射線４ｂ〜７ｂは図示
せず）上に切欠２ｂ〜２ｇが設けられている。該切欠２
ｂ〜２ｇによって、本体１の中心軸１から各稜角３ａ〜
８ａに向って測定された径方向の肉厚Ａ1 と、各鏡面３
〜８の中央に向って測定された径方向の肉厚Ｂ1 の差が
縮小され、本体１の成形時に、径方向の肉厚の収縮量の
不均一が低減される。
(57) [Abstract] [Purpose] To realize a plastic rotating polygon mirror that can prevent the reduction of the flatness of the mirror surface due to the non-uniformity of the shrinkage of the wall thickness in the radial direction. [Configuration] A regular polygonal main body 1 has a substantially circular shaft hole 2 in the center.
And a plurality of mirror surfaces 3 to 8 adjacent to each other are provided on the side surface 1a. The inner surface 2a of the shaft hole 2 is cut out on the radiation lines 3b to 8b (radiation lines 4b to 7b are not shown) directed from the central axis C 1 of the main body 1 to the ridge angles 3a to 8a at both ends of each mirror surface 3 to 8. 2b to 2g are provided. The notch 2
b to 2g, from the central axis 1 of the main body 1 to each ridge angle 3a to
8a and the radial wall thickness A 1 measured toward each mirror surface 3
The difference in the wall thickness B 1 in the radial direction measured toward the center of ˜8 is reduced, and the non-uniformity of the shrinkage amount of the wall thickness in the radial direction during the molding of the main body 1 is reduced.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、レーザビームプリンタ
やレーザファクシミリ等に用いられる光偏向器の回転多
面鏡に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary polygon mirror of an optical deflector used in laser beam printers, laser facsimiles and the like.
【０００２】[0002]
【従来の技術】近年、レーザビームプリンタやレーザフ
ァクシミリ等に用いられる光偏向器の回転多面鏡をプラ
スチック材料によって製作することで、回転多面鏡の慣
性を小さくするとともに、その製造コストを低減する方
法が注目されている。従来のプラスチック製の回転多面
鏡は、図５または図６に示すものが一般的である。2. Description of the Related Art Recently, a rotary polygon mirror of an optical deflector used in a laser beam printer, a laser facsimile, etc. is manufactured from a plastic material to reduce the inertia of the rotary polygon mirror and reduce its manufacturing cost. Is attracting attention. The conventional rotary polygon mirror made of plastic is generally shown in FIG. 5 or FIG.
【０００３】図５の（ａ）および（ｂ）に示す従来例
は、中央に軸穴１０２を有する本体１０１からなり、本
体１０１はプラスチック材料によって正六角柱状に一体
成形されたもので、その側面１０１ａは、各稜角１０３
ａ〜１０８ａにおいて互に隣接する６個の鏡面１０３〜
１０８からなる。各鏡面１０３〜１０８の平面度は、光
偏向器の精度に大きく影響するため、本体１０１の成形
時には、各鏡面１０３〜１０８が湾曲したり、凹凸が発
生して平面度が損われないように様々な工夫がなされて
いる。The conventional example shown in FIGS. 5A and 5B is composed of a main body 101 having a shaft hole 102 in the center, and the main body 101 is integrally molded in a regular hexagonal column shape from a plastic material, and its side surface is formed. 101a is each ridge angle 103
a to 108a, six mirror surfaces 103 adjacent to each other
It consists of 108. Since the flatness of each mirror surface 103 to 108 greatly affects the accuracy of the optical deflector, during molding of the main body 101, the flatness of each mirror surface 103 to 108 should be prevented from being curved or having irregularities. Various ideas have been made.
【０００４】また、図６の（ａ）および（ｂ）に示す従
来例は、材料の節約等のために、図５の回転多面鏡の本
体１０１と同様の本体２０１の両面にそれぞれ環状の凹
所、すなわち、肉抜き部分２０９，２１０を設けたもの
であり、中央の軸穴１０２、各鏡面１０３〜１０８およ
び各稜角１０３ａ〜１０８ａは、それぞれ図６に示した
ものと同様であるから同一符号で表わし説明は省略す
る。Further, in the conventional example shown in FIGS. 6A and 6B, in order to save material, etc., annular concave portions are formed on both sides of a main body 201 similar to the main body 101 of the rotary polygon mirror shown in FIG. That is, the thinned portions 209 and 210 are provided, and the central axial hole 102, each mirror surface 103 to 108, and each ridge angle 103a to 108a are the same as those shown in FIG. , And the explanation is omitted.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら上記従来
の技術によれば、図７の（ａ）に示すように、本体をプ
ラスチック材料によって一体的に成形する際の硬化収縮
時に、本体の中心軸Ｃ0から各鏡面１０３〜１０８の中
央部分に向って測定された径方向の肉厚Ｂ0 の収縮量よ
り、中心軸Ｃ0 から各稜角１０３ａ〜１０８ａに向って
測定された径方向の肉厚Ａ0 の収縮量の方が著しく大き
いために、図５の（ｂ）に示すように各鏡面１０３〜１
０８の中央部分が盛り上る一方で両端が逆に陥没し、平
面度が大きく損われる結果となっていた。However, according to the above-mentioned conventional technique, as shown in FIG. 7 (a), the central axis C of the main body at the time of shrinkage during curing when the main body is integrally molded with a plastic material. From the contraction amount of the wall thickness B 0 in the radial direction measured from 0 to the central portion of each mirror surface 103 to 108, the wall thickness A in the radial direction measured from the central axis C 0 to each ridge angle 103 a to 108 a Since the shrinkage amount of 0 is remarkably large, each mirror surface 103 to 1 as shown in FIG.
While the central part of 08 was raised, both ends were depressed in reverse, resulting in a large loss of flatness.
【０００６】本発明は上記従来の技術の有する問題点に
鑑みてなされたものであり、本体をプラスチック材料に
よって一体的に成形する際に、硬化収縮時の径方向の肉
厚の収縮量の不均一を低減して、各鏡面の平面度の低下
を防ぐことのできるプラスチック製回転多面鏡を提供す
ることを目的とするものである。The present invention has been made in view of the above problems of the prior art. When the main body is integrally molded with a plastic material, the shrinkage amount of the wall thickness in the radial direction at the time of curing and shrinking is not sufficient. It is an object of the present invention to provide a plastic rotating polygon mirror that can reduce the uniformity and prevent the reduction of the flatness of each mirror surface.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
めに本発明の装置は、中心軸に沿って配設された軸穴
と、互に隣接する複数の鏡面からなる側面を有する多角
柱状の本体からなり、該本体がプラスチック材料によっ
て一体成形されている回転多面鏡であって、前記本体の
中心軸から各鏡面の両端の稜角に向って測定された前記
軸穴の半径Ｒ1 と、前記本体の中心軸から各鏡面の中央
に向って測定された前記軸穴の半径Ｒ2 の間に以下の関
係が成立することを特徴とする。 Ｒ1 ＞Ｒ2 In order to achieve the above-mentioned object, the device of the present invention is a polygonal column having a shaft hole arranged along the central axis and a plurality of mirror-finished side surfaces adjacent to each other. And a radius R 1 of the shaft hole measured from the central axis of the main body toward the ridge angles of both ends of each mirror surface, The following relationship is established between the radius R 2 of the shaft hole measured from the central axis of the main body toward the center of each mirror surface. R 1 > R 2
【０００８】[0008]
【作用】上記装置によれば、本体の中心軸から各鏡面の
中央に向って測定された径方向の肉厚と、各鏡面の両端
に向って測定された径方向の肉厚の差が縮小される。こ
れによって、本体をプラスチック材料によって一体成形
する際の硬化収縮時に、径方向の肉厚の収縮量の不均一
が低減される。According to the above device, the difference between the radial thickness measured from the central axis of the main body toward the center of each mirror surface and the radial thickness measured toward both ends of each mirror surface is reduced. To be done. This reduces unevenness in the amount of shrinkage in the radial direction at the time of curing shrinkage when integrally molding the main body with a plastic material.
【０００９】[0009]
【実施例】本発明の実施例を図面に基づいて説明する。Embodiments of the present invention will be described with reference to the drawings.
【００１０】図１は第１実施例を示すもので、（ａ）は
その平面図、（ｂ）は（ａ）のＤ−Ｄ線に沿ってとった
断面図、（ｃ）は鏡面の一つを示す部分斜視図である。
本実施例の回転多面鏡Ｅ1 は、一体成形された正六角柱
の外形を有するプラスチック製の本体１からなり、本体
１の中央部分には、円形断面をもつ軸（図示せず）を挿
通させる軸穴２が設けられ、本体１の側面１ａは、各稜
角３ａ〜８ａにおいて互に隣接する６個の鏡面３〜８か
らなる。FIG. 1 shows a first embodiment. (A) is a plan view thereof, (b) is a sectional view taken along the line D--D of (a), and (c) is a mirror surface. It is a partial perspective view showing one.
The rotary polygon mirror E 1 of the present embodiment is composed of a plastic main body 1 having an external shape of a regular hexagonal column integrally molded, and a shaft (not shown) having a circular cross section is inserted through the central portion of the main body 1. A shaft hole 2 is provided, and the side surface 1a of the main body 1 is composed of six mirror surfaces 3 to 8 that are adjacent to each other at each ridge angle 3a to 8a.
【００１１】軸穴２は、略円筒状の内面２ａを有し、該
内面２ａには、周方向に等間隔でそれぞれ軸方向にのび
る６個の切欠２ｂ〜２ｇが設けられている。各切欠２ｂ
〜２ｇは、本体１の中心軸Ｃ1 から各稜角３ａ〜８ａに
向ってのびる放射線３ｂ〜８ｂ（放射線４ｂ〜７ｂは図
示せず）上に配置され、各切欠２ｂ〜２ｇの断面は各放
射線３ｂ〜８ｂ上に頂点を有する二等辺三角形の形状を
もつ。各切欠２ｂ〜２ｇの断面寸法は、本体１の中心軸
Ｃ1 から各稜角３ａ〜８ａに向って測定された本体１の
径方向の肉厚Ａ1 と、各鏡面３〜８の中央に向って測定
された本体１の径方向の肉厚Ｂ1 が、以下の式で表わす
関係を満足するように選定するのが望ましい。The shaft hole 2 has a substantially cylindrical inner surface 2a, and the inner surface 2a is provided with six notches 2b to 2g extending in the axial direction at equal intervals in the circumferential direction. Each notch 2b
2g are arranged on the radiations 3b to 8b (radiations 4b to 7b are not shown) extending from the central axis C 1 of the main body 1 toward the respective ridge angles 3a to 8a, and the cross sections of the notches 2b to 2g are the radiations. It has a shape of an isosceles triangle having vertices on 3b to 8b. The cross-sectional dimensions of the notches 2b to 2g are the wall thickness A 1 in the radial direction of the main body 1 measured from the central axis C 1 of the main body 1 toward the ridge angles 3a to 8a, and the center of each mirror surface 3 to 8. It is desirable that the radial thickness B 1 of the main body 1 measured as described above be selected so as to satisfy the relationship expressed by the following equation.
【００１２】 （Ａ1 −Ｂ1 ）／Ｂ1 ×１００≦１５（％）・・・・・（１） 上記の形状を有する本体１をプラスチック材料によって
一体的に成形すれば、硬化収縮時に各鏡面３〜８の中央
に向って測定された径方向の肉厚Ｂ1 の収縮量と、各稜
角３ａ〜８ａに向って測定された径方向の肉厚Ａ1 の収
縮量が著しく異なることなく、従って、図１の（ｃ）に
示すように各鏡面３〜８の中央部分の盛り上がりおよび
その両端の陥没は微小であり、各鏡面３〜８の平面度が
大きく損われるおそれはない。(A 1 −B 1 ) / B 1 × 100 ≦ 15 (%) (1) If the main body 1 having the above-mentioned shape is integrally molded with a plastic material, each of them can be cured and contracted at the time of shrinkage. The shrinkage amount of the radial thickness B 1 measured toward the center of the mirror surfaces 3 to 8 and the shrinkage amount of the radial thickness A 1 measured toward each of the ridge angles 3a to 8a are not significantly different. Therefore, as shown in FIG. 1 (c), the swelling of the central portion of each mirror surface 3 to 8 and the depression at both ends thereof are minute, and the flatness of each mirror surface 3 to 8 is not greatly impaired.
【００１３】図２は第１実施例の変形例を示すもので、
本変形例は、第１実施例の本体１と同様の本体１１に、
二等辺三角形の断面をもつ切欠２ｂ〜２ｇの替わりに、
台形の断面をもつ切欠１２ｂ〜１２ｇを設けたものであ
る。軸穴２、各鏡面３〜８、各稜角３ａ〜８ａについて
は第１実施例と同様であるので同一符号で表わし、説明
は省略する。FIG. 2 shows a modification of the first embodiment.
In this modified example, a main body 11 similar to the main body 1 of the first embodiment,
Instead of the notches 2b to 2g having an isosceles triangular cross section,
Notches 12b to 12g having a trapezoidal cross section are provided. Since the shaft hole 2, the mirror surfaces 3 to 8 and the ridge angles 3a to 8a are the same as those in the first embodiment, they are designated by the same reference numerals and the description thereof will be omitted.
【００１４】図３は第２実施例を示すもので（ａ）はそ
の平面図、（ｂ）は（ａ）のＥ−Ｅ線に沿ってとった断
面図である。本実施例の回転多面鏡Ｅ2 は、正六角柱の
形状に一体成形されたプラスチック製の本体２１からな
り、本体２１の中央には、本体２１の側面２１ａと相似
形の内面２２ａを有する軸穴２２が設けられている。本
体２１の側面２１ａは、各稜角２３ａ〜２８ａにおいて
互に隣接する６個の鏡面２３〜２８からなる。FIG. 3 shows a second embodiment, (a) is a plan view thereof, and (b) is a sectional view taken along the line EE of (a). The rotary polygon mirror E 2 of the present embodiment comprises a plastic main body 21 integrally molded in the shape of a regular hexagonal prism, and a shaft hole having a side surface 21a of the main body 21 and a similar inner surface 22a in the center of the main body 21. 22 is provided. The side surface 21a of the main body 21 is composed of six mirror surfaces 23 to 28 that are adjacent to each other at each ridge angle 23a to 28a.
【００１５】軸穴２２の各コーナー２２ｂ〜２２ｇは、
本体２１の中心軸Ｃ2 から本体２１の各稜角２３ａ〜２
８ａに向ってのびる放射線２３ｂ〜２８ｂ（放射線２４
ｂ〜２７ｂは図示せず）上に配置され、従って、本体２
１の各稜角２３ａ〜２８ａに向って測定された本体２１
の径方向の肉厚Ａ2 と、本体２１の中心軸Ｃ2 から各鏡
面２３〜２８の中央に向って測定された径方向の肉厚Ｂ
2 との差は、切欠のない円形の断面をもつ軸穴を有する
回転多面鏡に比べてはるかに小さい。その結果、本体２
１の成形過程において、上記径方向の肉厚Ａ2 およびＢ
2 の収縮量の差によって各鏡面２３〜２８の平面度が大
きく損われるおそれはない。なお、軸穴２２に挿通され
る軸（破線で示す）は、円形断面をもち、正六角形の断
面を有する軸穴２２に内接する。The corners 22b to 22g of the shaft hole 22 are
From the central axis C 2 of the main body 21 to the ridge angles 23a to 2 of the main body 21
Radiation 23b to 28b (radiation 24
b-27b are arranged on the main body 2
1. The main body 21 measured toward each ridge angle 23a to 28a of No. 1
Thickness A 2 in the radial direction and radial thickness B measured from the central axis C 2 of the main body 21 toward the centers of the respective mirror surfaces 23 to 28.
The difference from 2 is much smaller than that of a rotating polygon mirror having a shaft hole with a notched circular cross section. As a result, the main body 2
In the molding process of No. 1, the radial thicknesses A 2 and B
There is no fear that the flatness of each mirror surface 23 to 28 will be greatly impaired by the difference in the shrinkage amount of 2 . The shaft (shown by a broken line) inserted into the shaft hole 22 has a circular cross section and is inscribed in the shaft hole 22 having a regular hexagonal cross section.
【００１６】図４は第３実施例を示すもので、本実施例
の回転多面鏡Ｅ3 は、第１実施例の本体１と同様の本体
３１の両面のそれぞれに肉抜き部分３９，４０を設けた
ものであり、中央の軸穴３２は、第１実施例の切欠２２
ｂ〜２２ｇと同様の切欠３２ｂ〜３２ｇを有し、軸穴３
２の周囲に形成されたボス部４１には、軸穴３２の切欠
３２ｂ〜３２ｇとほぼ相似形の突起４１ｂ〜４１ｇが設
けられる。その他の点については第１実施例と同様であ
るので、同一符号で表わし説明は省略する。FIG. 4 shows a third embodiment. The rotary polygon mirror E 3 of this embodiment has lightening portions 39 and 40 on both sides of a main body 31 similar to the main body 1 of the first embodiment. The central axial hole 32 is provided in the notch 22 of the first embodiment.
The shaft hole 3 has notches 32b to 32g similar to those of b to 22g.
Protrusions 41b to 41g having a shape substantially similar to the cutouts 32b to 32g of the shaft hole 32 are provided on the boss portion 41 formed around the circumference of the shaft 2. Since the other points are the same as those in the first embodiment, they are denoted by the same reference numerals and the description thereof will be omitted.
【００１７】なお、第１ないし第３の実施例は、すべて
回転多面鏡の本体が正六角柱の外形を有する場合につい
て説明したが、回転多面鏡の本体が正四角柱ないし正八
角柱の外形を有する場合、本体の中心から各稜角に向っ
て測定された径方向の肉厚Ａと本体の中心から各鏡面の
中央に向って測定された径方向の肉厚Ｂの差と、該径方
向の肉厚Ｂの比Ｎ（百分率で表わした値）が、以下の式
で示すように、それぞれ４０％，２０％，１５％，１０
％，５％以下であれば、本体の成形時の収縮量の差が大
幅に低減されることが実験によって判明している。In the first to third embodiments, the case where the main body of the rotary polygon mirror has a regular hexagonal prism shape has been described. However, when the main body of the rotary polygon mirror has a regular square prism shape or a regular octagonal prism shape. , The difference between the radial thickness A measured from the center of the main body toward each ridge angle and the radial thickness B measured from the center of the main body toward the center of each mirror surface, and the radial thickness The ratio N of B (value expressed as a percentage) is 40%, 20%, 15%, and 10%, respectively, as shown in the following equations.
It has been proved by experiments that the difference in shrinkage amount at the time of molding of the main body is significantly reduced if it is 5% or less.
【００１８】 （Ａ−Ｂ）／Ｂ×１００≦Ｎ（％）・・・・・（２） ここで、正四角柱状の本体の場合はＮ＝４０ 正五角柱状の本体の場合はＮ＝２０ 正六角柱状の本体の場合はＮ＝１５ 正七角柱状の本体の場合はＮ＝１０ 正八角柱状の本体の場合はＮ＝５(AB) / B × 100 ≦ N (%) (2) Here, N = 40 in the case of a regular square columnar main body and N = 20 in the case of a regular pentagonal columnar body. N = 15 for regular hexagonal columnar body N = 10 for regular hexagonal columnar body N = 5 for regular octagonal columnar body
【００１９】[0019]
【発明の効果】本発明は上述のとおり構成されているの
で、以下に記載するような効果を奏する。Since the present invention is configured as described above, it has the following effects.
【００２０】回転多面鏡の本体をプラスチック材料によ
って一体成形する際に、径方向の肉厚の収縮量の不均一
を低減し、各鏡面の平面度の低下を防ぐことができる。
その結果、高精度で軽量かつ製造コストの低い光偏向器
を実現できる。When the body of the rotary polygon mirror is integrally molded with a plastic material, it is possible to reduce the unevenness of the shrinkage of the wall thickness in the radial direction and prevent the flatness of each mirror surface from decreasing.
As a result, it is possible to realize an optical deflector with high accuracy, light weight, and low manufacturing cost.
【図１】第１実施例を示すもので、（ａ）はその平面
図、（ｂ）は（ａ）のＤ−Ｄ線に沿ってとった断面図、
（ｃ）は複数の鏡面のうちの一つを示す部分斜視図であ
る。1 shows a first embodiment, (a) is a plan view thereof, (b) is a sectional view taken along line D-D of (a), FIG.
(C) is a partial perspective view showing one of a plurality of mirror surfaces.
【図２】第１実施例の変形例を示すもので、（ａ）はそ
の平面図、（ｂ）は（ａ）のＤ1 −Ｄ1 線に沿ってとっ
た断面図である。2A and 2B show modifications of the first embodiment, in which FIG. 2A is a plan view thereof, and FIG. 2B is a sectional view taken along line D 1 -D 1 of FIG.
【図３】第２実施例を示すもので、（ａ）はその平面
図、（ｂ）は（ａ）のＥ−Ｅ線に沿ってとった断面図で
ある。3A and 3B show a second embodiment, FIG. 3A is a plan view thereof, and FIG. 3B is a sectional view taken along line EE of FIG.
【図４】第３実施例を示すもので、（ａ）はその平面
図、（ｂ）は（ａ）のＦ−Ｆ線に沿ってとった断面図で
ある。4A and 4B show a third embodiment, FIG. 4A is a plan view thereof, and FIG. 4B is a sectional view taken along line FF of FIG. 4A.
【図５】従来例を示すもので、（ａ）はその斜視図、
（ｂ）は（ａ）のＧ−Ｇ線に沿ってとった断面図であ
る。FIG. 5 shows a conventional example, (a) is a perspective view thereof,
(B) is a sectional view taken along the line GG of (a).
【図６】別の従来例を示すもので、（ａ）はその斜視
図、（ｂ）は（ａ）のＨ−Ｈ線に沿ってとった断面図で
ある。6A and 6B show another conventional example, in which FIG. 6A is a perspective view thereof, and FIG. 6B is a sectional view taken along line HH of FIG.
【図７】従来例の鏡面が、収縮量の差によって変形する
理由を説明するもので、（ａ）は模式平面図、（ｂ）は
複数の鏡面のうちの一つを示す部分斜視図である。7A and 7B are views for explaining the reason why a mirror surface of a conventional example is deformed due to a difference in shrinkage amount. FIG. 7A is a schematic plan view, and FIG. 7B is a partial perspective view showing one of a plurality of mirror surfaces. is there.
１，１１，２１，３１ 本体 １ａ，２１ａ 側面 ２，２２，３２ 軸穴 ２ａ，２２ａ 内面 ２ｂ〜２ｇ，１２ｂ〜１２ｇ，３２ｂ〜３２ｇ 切欠 ３〜８，２３〜２８ 鏡面 ３ａ〜８ａ，２３ａ〜２８ａ 稜角 ２２ｂ〜２２ｇ コーナー ３９，４０ 肉抜き部分 ４１ ボス部 ４１ｂ〜４１ｇ 突起 1,11,21,31 Main body 1a, 21a Side surface 2,22,32 Shaft hole 2a, 22a Inner surface 2b-2g, 12b-12g, 32b-32g Notch 3-8, 23-28 Mirror surface 3a-8a, 23a-28a Ridge angle 22b to 22g Corner 39, 40 Thinned portion 41 Boss portion 41b to 41g Protrusion
Claims (2)
隣接する複数の鏡面からなる側面を有する多角柱状の本
体からなり、該本体がプラスチック材料によって一体成
形されている回転多面鏡であって、前記本体の中心軸か
ら各鏡面の両端の稜角に向って測定された前記軸穴の半
径Ｒ1 と、前記本体の中心軸から各鏡面の中央に向って
測定された前記軸穴の半径Ｒ2 の間に以下の関係が成立
することを特徴とするプラスチック製回転多面鏡。 Ｒ1 ＞Ｒ2 1. A rotary multifaceted body comprising a shaft-like hole arranged along a central axis and a polygonal columnar main body having side surfaces formed of a plurality of mirror surfaces adjacent to each other, the main body being integrally molded of a plastic material. A mirror, the radius R 1 of the shaft hole measured from the central axis of the main body toward the ridge angles of both ends of each mirror surface, and the axis measured from the central axis of the main body toward the center of each mirror surface. A plastic rotating polygon mirror characterized in that the following relationship is established between the radiuses R 2 of the holes. R 1 > R 2
向って測定された前記本体の径方向の肉厚Ａと、前記本
体の中心軸から各鏡面の中央に向って測定された前記本
体の径方向の肉厚Ｂの間に以下の関係が成立することを
特徴とする請求項１記載のプラスチック製回転多面鏡。 （Ａ−Ｂ）／Ｂ×１００≦Ｎ（％） ここで、正四角柱状の本体の場合はＮ＝４０ 正五角柱状の本体の場合はＮ＝２０ 正六角柱状の本体の場合はＮ＝１５ 正七角柱状の本体の場合はＮ＝１０ 正八角柱状の本体の場合はＮ＝５2. The radial thickness A of the main body measured from the central axis of the main body toward the ridge angles at both ends of each mirror surface, and the thickness measured from the central axis of the main body toward the center of each mirror surface. The plastic rotary polygon mirror according to claim 1, wherein the following relationship is established between the radial thicknesses B of the main body. (A−B) / B × 100 ≦ N (%) Here, N = 40 in the case of a regular square columnar body, N = 20 in the case of a regular pentagonal columnar body, and N = 15 in the case of a regular hexagonal columnar body. N = 10 for a regular octagonal column body, N = 5 for a regular octagonal column body
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28252092A JPH06110002A (en) | 1992-09-28 | 1992-09-28 | Plastic rotating polygon mirror |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28252092A JPH06110002A (en) | 1992-09-28 | 1992-09-28 | Plastic rotating polygon mirror |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06110002A true JPH06110002A (en) | 1994-04-22 |
Family
ID=17653525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28252092A Pending JPH06110002A (en) | 1992-09-28 | 1992-09-28 | Plastic rotating polygon mirror |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06110002A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7236282B2 (en) | 2004-04-16 | 2007-06-26 | Samsung Electronics Co., Ltd. | Polygon mirror and optical scanning apparatus employing the same |
| US7489430B2 (en) | 2004-04-07 | 2009-02-10 | Samsung Electronics Co., Ltd. | Polygonal mirror apparatus |
| CN102486547A (en) * | 2010-12-02 | 2012-06-06 | 三星电子株式会社 | Polyhedron mirror, light scanning unit and image forming device using polygon mirror |
| JP2019082599A (en) * | 2017-10-31 | 2019-05-30 | キヤノン株式会社 | Light deflector, optical scanner, and image forming apparatus |
| EP3581372A2 (en) | 2018-04-24 | 2019-12-18 | Canon Kabushiki Kaisha | Polygonal mirror, deflector, optical scanning apparatus, image forming apparatus, and manufacturing method of the polygonal mirror |
| JP2023128333A (en) * | 2022-03-03 | 2023-09-14 | キヤノン株式会社 | Polygon mirrors, optical polarizers, optical scanning devices, and image forming devices |
-
1992
- 1992-09-28 JP JP28252092A patent/JPH06110002A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7489430B2 (en) | 2004-04-07 | 2009-02-10 | Samsung Electronics Co., Ltd. | Polygonal mirror apparatus |
| US7236282B2 (en) | 2004-04-16 | 2007-06-26 | Samsung Electronics Co., Ltd. | Polygon mirror and optical scanning apparatus employing the same |
| CN102486547A (en) * | 2010-12-02 | 2012-06-06 | 三星电子株式会社 | Polyhedron mirror, light scanning unit and image forming device using polygon mirror |
| EP2461191A1 (en) * | 2010-12-02 | 2012-06-06 | Samsung Electronics Co., Ltd. | Polygonal Mirror, Light Scanning Unit using the Polygonal Mirror, and Image Forming Apparatus |
| US20120141167A1 (en) * | 2010-12-02 | 2012-06-07 | Samsung Electronics Co., Ltd. | Polygonal mirror, light scanning unit using the polygonal mirror, and image forming apparatus |
| JP2012118532A (en) * | 2010-12-02 | 2012-06-21 | Samsung Electronics Co Ltd | Polygon mirror and optical scanner and image forming apparatus using the same |
| US8711196B2 (en) | 2010-12-02 | 2014-04-29 | Samsung Electronics Co., Ltd. | Weight-balanced polygonal mirror, light scanning unit using the polygonal mirror, and image forming apparatus |
| US9429748B2 (en) | 2010-12-02 | 2016-08-30 | Samsung Electronics Co., Ltd. | Weight-balanced polygonal mirror, light scanning unit using the polygonal mirror, and image forming apparatus |
| JP2019082599A (en) * | 2017-10-31 | 2019-05-30 | キヤノン株式会社 | Light deflector, optical scanner, and image forming apparatus |
| EP3581372A2 (en) | 2018-04-24 | 2019-12-18 | Canon Kabushiki Kaisha | Polygonal mirror, deflector, optical scanning apparatus, image forming apparatus, and manufacturing method of the polygonal mirror |
| JP2023128333A (en) * | 2022-03-03 | 2023-09-14 | キヤノン株式会社 | Polygon mirrors, optical polarizers, optical scanning devices, and image forming devices |
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