JPH0512835Y2 - - Google Patents
Info
- Publication number
- JPH0512835Y2 JPH0512835Y2 JP1987149138U JP14913887U JPH0512835Y2 JP H0512835 Y2 JPH0512835 Y2 JP H0512835Y2 JP 1987149138 U JP1987149138 U JP 1987149138U JP 14913887 U JP14913887 U JP 14913887U JP H0512835 Y2 JPH0512835 Y2 JP H0512835Y2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- light
- light emitting
- face
- emitting element
- 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.)
- Expired - Lifetime
Links
- 239000013307 optical fiber Substances 0.000 claims description 86
- 210000000078 claw Anatomy 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Description
【考案の詳細な説明】
「産業上の利用分野」
この考案はバーコードに光を投射し、その反射
光を受光してバーコードを読取るバーコード読取
装置に関する。[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a barcode reading device that projects light onto a barcode and receives the reflected light to read the barcode.
「従来の技術」
従来のバーコード読取装置は第３図に示すよう
に匣体１１の前方端部内に集光レンズ１２が保持
され、集光レンズ１２と一端面が対向して共通光
フアイバ１３が設けられる。共通光フアイバ１３
の他端面の一半部と一端面を対向させて発光用光
フアイバ１４が設けられ、共通光フアイバ１３の
他端面の他半部と一端面を対向させて受光用光フ
アイバ１５が配される。発光用光フアイバ１４の
他端面と対向して発光素子１６が配され、受光用
光フアイバ１５の他端面と対向して受光素子１７
が配される。"Prior Art" As shown in FIG. 3, a conventional barcode reading device has a condensing lens 12 held in the front end of a case 11, and a common optical fiber 13 with one end face facing the condensing lens 12. will be provided. Common optical fiber 13
A light emitting optical fiber 14 is provided with one end face facing one half of the other end face, and a light receiving optical fiber 15 is provided with one end face facing the other half of the common optical fiber 13 . A light emitting element 16 is disposed facing the other end surface of the light emitting optical fiber 14, and a light receiving element 17 is disposed facing the other end surface of the light receiving optical fiber 15.
will be arranged.
発光用光フアイバ１４及び受光用光フアイバ１
５が共通光フアイバ１３と対向するようにその各
端面は第４図に示すように半円形とされていた。
従来においてはこれに伴つて発光用光フアイバ１
４及び受光用光フアイバ１５はそれぞれその全長
にわたり各断面が半円形とされていた。このため
発光素子１６からの光を発光用光フアイバ１４に
集光する集光性が悪く、かつ受光用光フアイバ１
５からの光を受光素子１７に投光する投光性が悪
く、高性能化が難しかつた。 Light emitting optical fiber 14 and light receiving optical fiber 1
Each end face of the optical fiber 5 was semicircular as shown in FIG. 4, so that it faced the common optical fiber 13.
Conventionally, along with this, the light emitting optical fiber 1
4 and the light-receiving optical fiber 15 each had a semicircular cross section over its entire length. Therefore, the light condensing ability for condensing the light from the light emitting element 16 onto the light emitting optical fiber 14 is poor, and the light receiving optical fiber 1
The light projection performance of projecting the light from the light receiving element 17 to the light receiving element 17 was poor, making it difficult to improve the performance.
また発光素子１６、受光素子１７を設けるた
め、これら素子の大きさの関係上発光用光フアイ
バ１４、受光用光フアイバ１５の間隔が共通光フ
アイバ１３から遠ざかるに従つて大きくなるよう
に両光フアイバ１４，１５をそれぞれ屈曲してい
た、このため小型化が難しく、かつ発光素子１６
から発生する光量を大とする必要があつた。 In addition, since the light emitting element 16 and the light receiving element 17 are provided, due to the size of these elements, the distance between the light emitting optical fiber 14 and the light receiving optical fiber 15 increases as the distance from the common optical fiber 13 increases. 14 and 15 were bent, which made it difficult to miniaturize the light emitting element 16.
It was necessary to increase the amount of light generated from the
「問題点を解決するための手段」
この考案によれば発光用光フアイバは前方端部
が断面半円形状とされ、その他は断面円形状とさ
れ、その半円形状の前方端面が一端面を集光レン
ズと対向させた共通光フアイバの他端面の一半部
と対向され、その共通光フアイバの延長上に直線
状に配される。受光用光フアイバは発光用光フア
イバと同様の形状とされ、その半円形状の前方端
面が共通光フアイバの他端面の他半部と対向さ
れ、かつ前方端部の前半部が発光用光フアイバの
前方端部に沿わされ、その後方部が発光用光フア
イバに対し斜めに配される。"Means for solving the problem" According to this invention, the front end of the light-emitting optical fiber has a semicircular cross section, and the other parts have a circular cross section, and the front end of the semicircular shape has an end surface. It faces one half of the other end surface of the common optical fiber facing the condensing lens, and is arranged linearly on an extension of the common optical fiber. The light-receiving optical fiber has the same shape as the light-emitting optical fiber, and its semicircular front end face is opposed to the other half of the other end face of the common optical fiber, and the front half of the front end is the same as the light-emitting optical fiber. The light-emitting optical fiber is placed along the front end of the fiber, and its rear portion is arranged obliquely to the light-emitting optical fiber.
発光用光フアイバの後方部は匣体に形成された
凹部に挿入位置決めされ、発光用光フアイバの他
端面と対向して匣体の発光素子収容部内に配され
る発光素子はその収容部の発光用光フアイバと平
行した壁面に形成された複数の爪によつて位置決
めされる。 The rear part of the light-emitting optical fiber is inserted and positioned in the recess formed in the case, and the light-emitting element disposed in the light-emitting element accommodating part of the casing facing the other end surface of the light-emitting optical fiber is placed in the light-emitting element accommodating part of the casing. The position is determined by a plurality of claws formed on a wall parallel to the optical fiber.
このように発光用光フアイバは共通光フアイバ
と一直線上に配置され、さらに発光用光フアイバ
と発光素子とは匣体に位置決めされて互いの軸ず
れが防止されているため、発光素子からの光は損
失が少なく共通光フアイバへ伝達される。 In this way, the light-emitting optical fiber is arranged in a straight line with the common optical fiber, and the light-emitting optical fiber and the light-emitting element are positioned in the case to prevent their axes from shifting, so that light from the light-emitting element is is transmitted to the common optical fiber with less loss.
「実施例」
第１図はこの考案によるバーコード読取装置の
一例を示す、匣体の一半部を外した状態を示して
いる。匣体２１の前方端に球状の集光レンズ２２
が保持され、集光レンズ２２と一端面が対向した
共通光フアイバ２３が直線状に匣体２１内に設け
られる。共通光フアイバ２３の他端面の一半部と
一端面が対向して発光用光フアイバ２４が設けら
れ、また共通光フアイバ２３の他端面の他半部と
一端面が対向して受光用光フアイバ２５が設けら
れる。発光用光フアイバ２４の他端面と対向して
発光素子２６が配され、受光用光フアイバ２５の
他端面と対向して受光素子２７が配される。Embodiment FIG. 1 shows an example of a barcode reading device according to this invention, with one half of the casing removed. A spherical condensing lens 22 is provided at the front end of the housing 21.
is held, and a common optical fiber 23 with one end face facing the condensing lens 22 is provided in a straight line inside the casing 21 . A light emitting optical fiber 24 is provided with one end face facing one half of the other end face of the common optical fiber 23, and a light receiving optical fiber 25 is provided with one end face facing the other half of the other end face of the common optical fiber 23. will be provided. A light emitting element 26 is disposed facing the other end surface of the light emitting optical fiber 24, and a light receiving element 27 is disposed facing the other end surface of the light receiving optical fiber 25.
発光用光フアイバ２４は共通光フアイバ２３の
延長上において直線状に配され、一方、受光用光
フアイバ２５は共通光フアイバ２３の延長上に直
線状に配された後、屈曲され、発光用光フアイバ
２４に対して斜めとされている。更に発光用光フ
アイバ２４、受光用光フアイバ２５の何れも、そ
の共通光フアイバ２３側の前方端部は第２図Ｂに
示すように断面半円形状をしており、その他は第
２図Ｃに示すように断面円形状とされ、つまり変
形光フアイバとされて、その半円形状の前方端面
が共通光フアイバ２３の他端面と対向されてい
る。なお、受光用光フアイバ２５はその前方端部
の前半部が発光用光フアイバ２４の前方端部に沿
わされている。受光素子２７は発光素子２６に対
し、共通光フアイバ２３側にずらされて配されて
いる。 The light-emitting optical fiber 24 is arranged linearly on the extension of the common optical fiber 23, while the light-receiving optical fiber 25 is arranged linearly on the extension of the common optical fiber 23 and then bent to form the light-emitting light. It is oblique to the fiber 24. Further, both the light emitting optical fiber 24 and the light receiving optical fiber 25 have a front end on the side of the common optical fiber 23 having a semicircular cross section as shown in FIG. 2B, and the other parts are as shown in FIG. 2C. As shown in FIG. 2 , the optical fiber has a circular cross section, that is, it is a deformed optical fiber, and its semicircular front end face faces the other end face of the common optical fiber 23 . Note that the front half of the light-receiving optical fiber 25 is placed along the front end of the light-emitting optical fiber 24 . The light receiving element 27 is shifted toward the common optical fiber 23 with respect to the light emitting element 26.
発光用光フアイバ２４の発光素子２６側の後方
部は匣体２１に形成された凹部２８内に位置決め
挿入され、その端部は匣体２１の発光素子収容部
内に位置され、その発光素子収容部の発光用光フ
アイバ２４と平行した壁面に形成した複数の爪２
９により発光素子２６が位置決めされ、発光用光
フアイバ２４に対する軸ずれが防止されている。
更に舌片３１により発光素子２６は発光用光フア
イバ２４の端面に弾性的に圧接され、発光用光フ
アイバ２４と発光素子２６との間の間〓による光
損失が少なくなるようにされている。受光用光フ
アイバ２５も凹部３２を通じて受光素子収容部３
３内に挿入されて位置決めされ、受光素子収容部
３３の爪３４により受光素子２７は受光用光フア
イバ２５の端面に圧接される。 The rear part of the light-emitting optical fiber 24 on the light-emitting element 26 side is positioned and inserted into the recess 28 formed in the casing 21, and the end thereof is located in the light-emitting element accommodating part of the casing 21. A plurality of claws 2 formed on a wall parallel to the light emitting optical fiber 24 of
The light emitting element 26 is positioned by the reference numeral 9, and axis shift with respect to the light emitting optical fiber 24 is prevented.
Furthermore, the light emitting element 26 is elastically pressed against the end surface of the light emitting optical fiber 24 by the tongue piece 31, so that light loss due to the gap between the light emitting optical fiber 24 and the light emitting element 26 is reduced. The light-receiving optical fiber 25 is also connected to the light-receiving element housing portion 3 through the recess 32.
The light receiving element 27 is inserted into the light receiving optical fiber 25 and positioned, and the light receiving element 27 is pressed against the end surface of the light receiving optical fiber 25 by the claw 34 of the light receiving element accommodating portion 33 .
「考案の効果」
以上述べたようにこの考案のバーコード読取装
置においては共通光フアイバ２３に対し、その延
長線上において直線状に発光用光フアイバ２４が
配され、さらに発光用光フアイバ２４と発光素子
２６とは匣体２１に位置決めされて互いの軸ずれ
が防止されるため発光素子２６より光は損失少な
く伝搬する。"Effects of the Invention" As described above, in the barcode reading device of this invention, the light-emitting optical fiber 24 is arranged in a straight line on the extension line of the common optical fiber 23, and the light-emitting optical fiber 24 and the light-emitting optical fiber Since the light emitting element 26 and the light emitting element 26 are positioned in the casing 21 and their axes are prevented from shifting, light propagates from the light emitting element 26 with less loss.
また発光用光フアイバ２４、受光用光フアイバ
２５が変形光フアイバであり、一方の端面は半円
形だが、他方の端面は円形となつているため、発
光素子２６、受光素子２７との各光結合が損失少
なく行われ、投光量、受光量を増加させることが
でき、それだけ発光素子２６の発光光量を少なく
することができ、小形化することができる。 Furthermore, the light-emitting optical fiber 24 and the light-receiving optical fiber 25 are deformed optical fibers, and one end face is semicircular, while the other end face is circular, so that optical coupling with the light-emitting element 26 and the light-receiving element 27 is achieved. is performed with less loss, the amount of light emitted and the amount of light received can be increased, the amount of light emitted by the light emitting element 26 can be reduced accordingly, and the size can be reduced.
発光素子２６に対し受光素子２７の方が一般に
小さいため、発光用光フアイバ２４を直線状と
し、受光用光フアイバ２５を発光用光フアイバ２
４に対し斜めに屈曲し、かつ発光素子２６に対し
受光素子２７を共通光フアイバ２３側に位置する
ことにより全体として小形に構成することができ
る。 Since the light-receiving element 27 is generally smaller than the light-emitting element 26, the light-emitting optical fiber 24 is straight, and the light-receiving optical fiber 25 is the same as the light-emitting optical fiber 2.
4, and by locating the light receiving element 27 on the common optical fiber 23 side with respect to the light emitting element 26, the overall size can be reduced.
第１図はこの考案によるバーコード読取装置の
実施例を示し、匣体の一半部を外した平面図、第
２図Ａは発光用光フアイバの平面図、第２図Ｂは
その左端面図、第２図Ｃは第２図Ａの右端面図、
第３図は従来のバーコード読取装置を示す平面
図、第４図は第３図のAA線断面図である。
Fig. 1 shows an embodiment of the barcode reading device according to this invention, and is a plan view with half of the casing removed, Fig. 2A is a plan view of the light emitting optical fiber, and Fig. 2B is a left end view thereof. , FIG. 2C is a right end view of FIG. 2A,
FIG. 3 is a plan view showing a conventional barcode reading device, and FIG. 4 is a sectional view taken along line AA in FIG. 3.
Claims (1)
ンズと、 上記匣体内に直線状に配され、一端面を上記集
光レンズと対向させた共通光フアイバと、 前方端部が断面半円形状とされ、その他は断面
円形状とされ、その半円形状の前方端面が上記共
通光フアイバの他端面の一半部と対向され、その
共通光フアイバの延長上に直線状に配された発光
用光フアイバと、 前方端部が断面半円形状とされ、その他は断面
円形状とされ、その半円形状の前方端面が上記共
通光フアイバの他端面の他半部と対向され、かつ
前方端部の前半部が上記発光用光フアイバの前方
端部に沿わされ、その後方部が上記発光用光フア
イバに対し斜めに配された受光用光フアイバと、 上記発光用光フアイバの他端面と対向して、上
記匣体の発光素子収容部内に配された発光素子
と、 上記受光用光フアイバの他端面と対向して配さ
れた受光素子と、 上記匣体に形成され、上記発光用光フアイバの
後方部が挿入位置決めされる凹部と、 上記発光素子収容部の上記発光用光フアイバと
平行した壁面に形成され、上記発光素子を位置決
めする複数の爪と、 を具備するバーコード読取装置。[Scope of Claim for Utility Model Registration] A case, a condenser lens held at the front end of the case, and a common light arranged linearly within the case, with one end facing the condenser lens. The fiber has a front end having a semicircular cross section and a circular cross section at the other end thereof, and the semicircular front end face is opposed to half of the other end face of the common optical fiber, and the common optical fiber is an extension of the common optical fiber. A light-emitting optical fiber is arranged in a straight line on the top, and the front end has a semicircular cross section, and the other part has a circular cross section, and the semicircular front end face is similar to the other end face of the common optical fiber. a light-receiving optical fiber that is opposed to the half part, and has a front end whose front half is along the front end of the light-emitting optical fiber, and whose rear part is arranged diagonally with respect to the light-emitting optical fiber; a light emitting element disposed in the light emitting element accommodating portion of the casing, facing the other end surface of the light emitting optical fiber; a light receiving element disposed facing the other end surface of the light receiving optical fiber; and the casing. a recess formed in a recess into which a rear portion of the light emitting optical fiber is inserted and positioned; a plurality of claws formed on a wall surface parallel to the light emitting optical fiber of the light emitting element accommodating part and positioning the light emitting element; A barcode reading device comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987149138U JPH0512835Y2 (en) | 1987-09-28 | 1987-09-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987149138U JPH0512835Y2 (en) | 1987-09-28 | 1987-09-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6454162U JPS6454162U (en) | 1989-04-04 |
| JPH0512835Y2 true JPH0512835Y2 (en) | 1993-04-05 |
Family
ID=31421094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987149138U Expired - Lifetime JPH0512835Y2 (en) | 1987-09-28 | 1987-09-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0512835Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5323388U (en) * | 1976-08-05 | 1978-02-27 | ||
| JPS618376B2 (en) * | 1980-11-20 | 1986-03-13 | Showa Denko Kk |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS618376U (en) * | 1984-06-18 | 1986-01-18 | アルプス電気株式会社 | optical reader |
-
1987
- 1987-09-28 JP JP1987149138U patent/JPH0512835Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5323388U (en) * | 1976-08-05 | 1978-02-27 | ||
| JPS618376B2 (en) * | 1980-11-20 | 1986-03-13 | Showa Denko Kk |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6454162U (en) | 1989-04-04 |
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