JPH0628873Y2 - Remote control light receiving unit - Google Patents
Remote control light receiving unitInfo
- Publication number
- JPH0628873Y2 JPH0628873Y2 JP1989093045U JP9304589U JPH0628873Y2 JP H0628873 Y2 JPH0628873 Y2 JP H0628873Y2 JP 1989093045 U JP1989093045 U JP 1989093045U JP 9304589 U JP9304589 U JP 9304589U JP H0628873 Y2 JPH0628873 Y2 JP H0628873Y2
- Authority
- JP
- Japan
- Prior art keywords
- light receiving
- receiving unit
- remote control
- control light
- mesh
- 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
Landscapes
- Selective Calling Equipment (AREA)
- Optical Communication System (AREA)
Description
【考案の詳細な説明】 〈産業上の利用分野〉 本考案は、ＴＶ，ＶＴＲ等の赤外線リモコンの受光ユニ
ットに関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a light receiving unit of an infrared remote controller such as a TV or a VTR.
〈従来の技術〉 一般にリモコン受光ユニットは、赤外線のコード化した
信号光を受信し、該信号光を電気信号に変換して送信と
同じコード化された情報を得るものであり、上記信号光
は微弱であるためアンプ回路の増幅度を上げざるを得な
い。この結果、電磁ノイズに対しても同様に敏感となる
ため、信号／ノイズ比（Ｓ／Ｎ比）を高める目的で外部
を金属製のシールドケースで覆うことが必要となる。<Prior Art> Generally, a remote control light-receiving unit receives infrared-coded signal light, converts the signal light into an electric signal, and obtains the same coded information as transmission. Since it is weak, the amplification degree of the amplifier circuit must be increased. As a result, it is also sensitive to electromagnetic noise, so that it is necessary to cover the outside with a metal shield case for the purpose of increasing the signal / noise ratio (S / N ratio).
しかし、赤外線の信号光を受光する部分は光を透過させ
なければならない為、シールドケースに窓を設けてい
る。即ち、第３図(a)乃至(c)の通り従来のリモコン受光
ユニットのシールドケース４において、信号光を受光す
る部分に、ホトダイオード１のレンズ部分が出る様に窓
２を設けている。なお、同図(a)は従来のリモコン受光
ユニットの正面図同図(b)及び(c)は、それぞれ同図(a)
のA3-A3′断面図及びB3-B3′断面図である。However, since the portion that receives the infrared signal light must transmit light, a window is provided in the shield case. That is, as shown in FIGS. 3A to 3C, in the shield case 4 of the conventional remote control light receiving unit, the window 2 is provided so that the lens portion of the photodiode 1 is exposed at the portion receiving the signal light. It should be noted that the same figure (a) is a front view of a conventional remote control light receiving unit, and the same figures (b) and (c) are respectively the same figure (a).
3 is an A 3 -A 3 ′ sectional view and a B 3 -B 3 ′ sectional view of FIG.
このリモコン受光ユニットをＴＶ等の電磁ノイズの多い
機器に取り付けた場合、なお上記受光窓２の部分から電
磁ノイズが侵入し、リモコン受光ユニットが誤動作する
場合がある。この様に外部の電磁ノイズが大きい環境で
は、受光窓２の部分から侵入した外部の電磁ノイズによ
って無信号時に出力に誤パルスが発生したり、送信信号
の受信時においては到達距離が低下する場合がある。When this remote control light receiving unit is attached to a device such as a TV that has a lot of electromagnetic noise, electromagnetic noise may still enter from the light receiving window 2 and the remote control light receiving unit may malfunction. In such an environment where the external electromagnetic noise is large, an erroneous pulse may be generated in the output when there is no signal due to the external electromagnetic noise that has entered through the light receiving window 2, or the reaching distance may decrease when the transmission signal is received. There is.
〈考案が解決しようとする課題〉 そこで耐電磁ノイズ特性を向上する目的で、導電性の透
明フィルムを受光窓に貼りつける方法がある。その一例
を第４図(a)乃至(c)に示す。同図(a)は、正面図、同図
(b)及び(c)は、同図(a)のA4-A4′断面図及びB4-B4′断
面図である。同図に示すように、導電性の透明フィルム
３を受光窓２に貼りつけて耐電磁ノイズ対策をしてい
る。しかし、上記透明フィルム３の材料費，貼付工数等
コストアップするデメリットがあった。また上記透明フ
ィルム３は片面に透明の導電膜を形成している構造であ
るが、シールドケース４との導通がとりにくく、耐電磁
ノイズ特性も一部の機器に対しては特性を満足していな
い場合があった。<Problems to be Solved by the Invention> Therefore, there is a method of attaching a conductive transparent film to the light receiving window for the purpose of improving the electromagnetic noise resistance. An example thereof is shown in FIGS. 4 (a) to (c). The same figure (a) is a front view and the same figure.
(b) and (c) is a A 4 -A 4 'cross-sectional view and B 4 -B 4' sectional view of FIG. (a). As shown in the figure, a conductive transparent film 3 is attached to the light receiving window 2 to prevent electromagnetic noise. However, there is a demerit that the cost of the material of the transparent film 3 and the number of attaching steps are increased. Further, although the transparent film 3 has a structure in which a transparent conductive film is formed on one surface, it is difficult to establish conduction with the shield case 4, and the electromagnetic noise resistance characteristic also satisfies the characteristic for some devices. There were times when it wasn't.
さらに上記受光窓２に半田付け等により、金属メッシュ
を貼り付けたタイプ（実公昭51-45495）や、第５図(a)
乃至(c)のごとくシールドケース４の受光窓２をメッシ
ュ形状に打ち抜いてメッシュ部５を形成したタイプ（実
公昭62-23182）があるが、金属メッシュを貼り付けした
タイプは上記の透明フィルムと同じく材料費および貼付
工数がかかるためコストアップにつながるデメリットが
あった。また、メッシュ部５を形成するタイプは受光平
面上にメッシュ部５を形成しているため、指向特性を得
るにはメッシュによる開口面積を大きく取る必要があ
り、開口面積を大きく取ることによって耐電磁ノイズ特
性が低下する問題があった。Further, a type in which a metal mesh is attached to the light receiving window 2 by soldering or the like (Jitsuko Sho 51-45495), and FIG. 5 (a)
As shown in (c) to (c), there is a type in which the light receiving window 2 of the shield case 4 is punched out in a mesh shape to form a mesh portion 5 (Jitsuko Sho 62-23182). Similarly, there is a demerit that leads to cost increase because it requires material cost and man-hours for pasting. Further, in the type of forming the mesh portion 5, since the mesh portion 5 is formed on the light receiving plane, it is necessary to make the opening area of the mesh large in order to obtain the directional characteristics. There was a problem that the noise characteristics deteriorate.
本考案は上記の様な従来の問題点を解決しながら耐電磁
ノイズ特性を向上し、且つ到達距離の指向角特性も満足
するよう考案したものである。The present invention is designed to improve the electromagnetic noise resistance while satisfying the directivity characteristics of the reach distance while solving the above-mentioned conventional problems.
〈課題を解決するための手段〉 本考案のリモコン受光ユニットはシールドケースを打ち
抜いてメッシュ部を形成すると共に、前記メッシュ部の
外方に、前記シールドケースを内側に切り起こして中央
部に向かう切片を形成してなる受光用開口部を設けたこ
とを特徴とする。<Means for Solving the Problems> The remote control light-receiving unit of the present invention has a shield case punched out to form a mesh part, and the shield case is cut and raised inside the mesh part outside the mesh part toward the central part. Is provided with a light receiving opening.
〈作用〉 上記構造により従来のメッシュ構造に切べ、電磁ノイズ
の侵入路である受光部の開口面積を小さくでき、耐電磁
ノイズ特性の向上および指向角特性の向上が図れる。<Operation> With the above structure, the conventional mesh structure can be cut, and the opening area of the light receiving portion, which is an intrusion path for electromagnetic noise, can be reduced, and electromagnetic noise resistance characteristics and directivity angle characteristics can be improved.
〈実施例〉 本考案一実施例を第１図(a)乃至(c)に従って説明する。
同図(a)は本考案によるリモコン受光ユニットの正面
図、同図(b)及び(c)はそれぞれ同図(a)のA1-A1′断面図
及びB1-B1′断面図である。なお、従来例と同一機能部
分には同一番号を付している。<Embodiment> An embodiment of the present invention will be described with reference to FIGS. 1 (a) to 1 (c).
Front view, FIG. (B) and (c) A 1 -A 1 'sectional view and B 1 -B 1' sectional view of FIG respectively (a) in FIG. (A) the remote control light receiving unit according to the present invention Is. The same functional parts as those in the conventional example are designated by the same reference numerals.
同図において、シールドケース４の受光窓２に上記シー
ルドケース４を打ち抜いてメッシュ部５を形成し、該メ
ッシュ部５の外側部分は打ち抜くのではなく、複数の切
片６として切り起こし内側中央部に折り曲げる構造とし
ている。切片６，６，６，６は打ち抜いた場合と同一の
指向角が得られるとともに開口面積は打ち抜いた場合よ
り小さくできるため、耐電磁ノイズ性を向上することが
可能となる。また、切片６，６の境界部のバー７の位置
をホトダイオード１のセンターからずらすことにより、
上記切片６，６とメッシュ部５の間から入射する斜め方
向の光に対する上記ホトダイオード１の受光量を大きく
することができ、指向角特性の改善も可能である。In the figure, the shield case 4 is punched into the light-receiving window 2 of the shield case 4 to form a mesh portion 5. The outer portion of the mesh portion 5 is not punched out but cut and raised as a plurality of pieces 6 to the inner central portion. It has a folding structure. Since the intercepts 6, 6, 6, 6 can obtain the same directivity angle as in the case of punching and the opening area can be made smaller than that in the case of punching, it is possible to improve the electromagnetic noise resistance. Further, by shifting the position of the bar 7 at the boundary between the sections 6 and 6 from the center of the photodiode 1,
It is possible to increase the amount of light received by the photodiode 1 with respect to the oblique light incident between the sections 6 and 6 and the mesh portion 5, and it is possible to improve the directivity angle characteristic.
第１表に、従来例と本考案一実施例による指向角特性及
び耐電磁ノイズ特性に関するデータの比較を示す。Table 1 shows a comparison of data on the directivity angle characteristics and the electromagnetic noise resistance characteristics according to the conventional example and one embodiment of the present invention.
第１表から明らかなように、本考案によれば、指向特性
及び耐電磁ノイズ特性のいずれもが、従来のメッシュ構
造に比べて向上している。 As is clear from Table 1, according to the present invention, both the directivity characteristic and the electromagnetic noise resistance characteristic are improved as compared with the conventional mesh structure.
また、コスト面に関しても、本考案によれば、シールド
ケース４をプレス加工のみで形成するため、フィルム貼
り付けや、メッシュ貼り付け構造の様な、材料，工数の
アップがなく、従来と同一コストで指向角特性や耐ノイ
ズ性を向上させることが可能である。Further, in terms of cost, according to the present invention, since the shield case 4 is formed only by press working, there is no increase in materials and man-hours such as film pasting and mesh pasting structure, and the same cost as the conventional one. It is possible to improve the directivity angle characteristics and noise resistance.
第２図(a)乃至(d)に、本考案による他の実施例を示す。
同図(a)は本考案の他の実施例による、リモコン受光ユ
ニットの正面図、同図(b)は同図(a)のA2-A2′断面図、
同図(c)は同図(a)のB2-B2′断面図、同図(d)は同図(a)
のC2-C2′断面図である。2 (a) to 2 (d) show another embodiment according to the present invention.
FIG. 3A is a front view of a remote control light receiving unit according to another embodiment of the present invention, FIG. 2B is a sectional view taken along line A 2 -A 2 ′ of FIG.
The figure (c) is a sectional view taken along the line B 2 -B 2 ′ of the figure (a), and the figure (d) is the figure (a).
2 is a C 2 -C 2 ′ sectional view of FIG.
第１図に示す実施例のメッシュ１外縁の切片６は、左右
方向の観音開きの形状であったが、本実施例はさらに開
口面積を小さくし、耐電磁ノイズ性を向上させるために
切片６を外縁四方向において、内側に折り曲げた構造に
したものである。The section 6 of the outer edge of the mesh 1 of the embodiment shown in FIG. 1 has a shape of a double-sided opening in the left-right direction, but in the present embodiment, the section 6 is used to further reduce the opening area and improve the electromagnetic noise resistance. It has a structure in which it is bent inward in the four directions of the outer edge.
〈考案の効果〉 以上から明らかなように、本考案によれば、リモコン受
光ユニットの指向角特性及び耐電磁ノイズ特性が大幅に
向上する。また、コスト的にも従来のメッシュ構造から
コストアップすることなく、上記特性の向上が図れる。<Effect of Device> As is apparent from the above, according to the present invention, the directivity angle characteristic and the electromagnetic noise resistance of the remote control light receiving unit are significantly improved. Further, in terms of cost, the above characteristics can be improved without increasing the cost from the conventional mesh structure.
第１図(a)は本考案一実施例によるリモコン受光ユニッ
トの正面図、同図(b)及び(c)はそれぞれ同図(a)のA1-
A1′断面図及びB1-B1′断面図である。第２図(a)は本考
案の他の実施例にゆるリモコン受光ユニットの正面図、
同図(b),(c),(d)はそれぞれ同図(a)のA2-A2′断面図、B
2-B2′断面図、C2-C2′断面図である。第３図乃至第５
図は、従来例によるリモコン受光ユニットの構造図であ
る。 ４…シールドケース、５…メッシュ、６…切片。FIG. 1 (a) is a front view of a remote control light receiving unit according to an embodiment of the present invention, and FIGS. 1 (b) and (c) are A 1-of FIG. 1 (a), respectively.
FIG. 4 is a cross-sectional view taken along the line A 1 ′ and a line B 1 -B 1 ′. FIG. 2 (a) is a front view of a remote control light receiving unit according to another embodiment of the present invention,
Figures (b), (c), and (d) are cross-sectional views taken along line A 2 -A 2 ′ and B of Figure (a), respectively.
FIG. 2 is a 2- B 2 ′ sectional view and a C 2 -C 2 ′ sectional view. 3 to 5
FIG. 1 is a structural diagram of a conventional remote control light receiving unit. 4 ... Shield case, 5 ... Mesh, 6 ... Section.
Claims (1)
形成すると共に、前記メッシュ部の外方に、前記シール
ドケースを内側に切り起こして中央部に向かう切片を形
成してなる受光用開口部を設けたことを特徴とするリモ
コン受光ユニット。1. A shield case is punched out to form a mesh part, and a light receiving opening is formed outside the mesh part by cutting and raising the shield case inward to form a section toward the center. Remote control light receiving unit characterized by
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989093045U JPH0628873Y2 (en) | 1989-08-08 | 1989-08-08 | Remote control light receiving unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989093045U JPH0628873Y2 (en) | 1989-08-08 | 1989-08-08 | Remote control light receiving unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0332887U JPH0332887U (en) | 1991-03-29 |
| JPH0628873Y2 true JPH0628873Y2 (en) | 1994-08-03 |
Family
ID=31642443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989093045U Expired - Lifetime JPH0628873Y2 (en) | 1989-08-08 | 1989-08-08 | Remote control light receiving unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0628873Y2 (en) |
-
1989
- 1989-08-08 JP JP1989093045U patent/JPH0628873Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0332887U (en) | 1991-03-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |