JPH0286044A - Discharge lamp - Google Patents

Discharge lamp

Info

Publication number
JPH0286044A
JPH0286044A JP23530688A JP23530688A JPH0286044A JP H0286044 A JPH0286044 A JP H0286044A JP 23530688 A JP23530688 A JP 23530688A JP 23530688 A JP23530688 A JP 23530688A JP H0286044 A JPH0286044 A JP H0286044A
Authority
JP
Japan
Prior art keywords
bulb
heat
tube
thermal shrinkage
end section
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.)
Pending
Application number
JP23530688A
Other languages
Japanese (ja)
Inventor
Masaharu Baba
馬場 正治
Takao Mizukami
水上 隆生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Lighting and Technology Corp
Original Assignee
Toshiba Lighting and Technology Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Lighting and Technology Corp filed Critical Toshiba Lighting and Technology Corp
Priority to JP23530688A priority Critical patent/JPH0286044A/en
Publication of JPH0286044A publication Critical patent/JPH0286044A/en
Pending legal-status Critical Current

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Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

PURPOSE:To reduce the insertion resistance into a bulb, easily release air at the time of thermal shrinkage, and improve appearance by dividing a translucent thermal shrinkage tube covering a bulb into multiple parts in the tube axis direction of the bulb. CONSTITUTION:A band-shaped heater 4 is arranged in the tube axis direction over the whole outer surface of a bulb 1, and halved translucent thermal shrinkage tubes 5a and 5b are fitted over the whole length on the outer surface. The thermal shrinkage tubes 5a and 56 slightly longer than the length from the end section to the center of the bulb 1 are used, for example. One of them is inserted from one end section of the bulb 1 so that the position matching the end section outer face 1b of a base 1a becomes a terminal end, and it is heated from the bulb end section for thermal shrinkage. The other is inserted so that the position matching the other end section outer face 1c of the base 1a becomes a terminal end for thermal shrinkage. When the heater 4 is fixed, the air between the bulb and the thermal shrinkage tube is easily released, appearance is improved, and workability can be improved.

Description

【発明の詳細な説明】 [発明の目的] (産業上の利用分野) この発明は、バルブの外表面にヒータ、外部電極などの
電気部品を設けてなる放電灯に関する。
DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a discharge lamp in which electric parts such as a heater and an external electrode are provided on the outer surface of the bulb.

(従来の技術) 各種の計器類や液晶表示装置又は液晶テレビなどのバッ
クライトとして、冷陰極蛍光ランプ。
(Prior art) Cold cathode fluorescent lamps are used as backlights for various instruments, liquid crystal display devices, liquid crystal televisions, etc.

熱陰極蛍光ランプ(放電灯)が使用されている。Hot cathode fluorescent lamps (discharge lamps) are used.

ところで、こうした蛍光ランプは温度条件の厳しい環境
で使用されることがある。例えば車両用表示装置に使用
されているバックライト用の蛍光ランプなどは、プラス
40℃位から氷点下30℃位までの広い温度域で使用さ
れる。このため、蛍光ランプには苛酷な温度環境状況で
も、良好な起動性および立上がり特性が要求される。
Incidentally, such fluorescent lamps are sometimes used in environments with severe temperature conditions. For example, fluorescent lamps for backlights used in vehicle display devices are used in a wide temperature range from about +40° C. to about -30° C. For this reason, fluorescent lamps are required to have good start-up performance and start-up characteristics even in severe temperature environments.

そこで、蛍光ランプのバルブ外表面にヒータ、さらには
該ヒータを制御するための温度ヒユーズ。
Therefore, a heater is installed on the outer surface of the bulb of the fluorescent lamp, and a temperature fuse is installed to control the heater.

サーミスタ、正特性サーミスなどといった電気部品を設
けて、バルブの加熱によりバルブ内に封入した水銀の蒸
発を促して、安定点灯に達するまでの時間を短縮させた
ものがある。
Some lamps are equipped with electrical components such as thermistors or positive temperature coefficient thermistors to heat the bulb to promote evaporation of the mercury sealed inside the bulb, thereby shortening the time it takes to reach stable lighting.

ところで、こうした電気部品の固定には、従来より、バ
ルブ全長に熱収縮チューブを被覆し、て、バルブの外表
面に押え付けることが行なわれている。具体的には、直
管のバルブの外周に、透光性に優れた一本の熱収縮チュ
ーブを挿入して全長に被せる。そして、この熱収縮チュ
ーブをバルブの一端側から他端側に向って徐々に加温す
ることにより、電気部品の固定が行なわれる。つまり、
熱収縮チューブとバルブとの間の空気を抜きながらチュ
ーブを収縮させ、この収縮力で電気部品をバルブ外表面
に動かないように固定している。
By the way, in order to fix such electrical parts, conventionally, the entire length of the bulb is covered with a heat-shrinkable tube and then pressed onto the outer surface of the bulb. Specifically, a piece of heat-shrinkable tube with excellent translucency is inserted around the outer periphery of a straight bulb to cover its entire length. The electrical components are then fixed by gradually heating the heat-shrinkable tube from one end of the valve toward the other end. In other words,
The tube is contracted while removing the air between the heat-shrinkable tube and the bulb, and this shrinkage force is used to fix the electrical components to the outer surface of the bulb so that they do not move.

(発明が解決しようとする課題) ところが、こうした作業は、−本の長い熱収縮チューブ
をバルブに挿入するので、面倒である。
(Problem to be Solved by the Invention) However, such work is troublesome because a long heat shrink tube is inserted into the valve.

直管のバルブの場合には余り不都合は生じなかったが、
大きな抵抗が作用する環形などの曲管バルブの場合は面
倒で、場合によっては挿入の際の抵抗で電気部品の位置
がずれたり、極端な場合には蛍光ランプの脆弱部を破損
させるおそれがある。
In the case of straight pipe valves, there were not many inconveniences, but
This is troublesome when using curved tube bulbs such as ring-shaped bulbs that are subject to large resistance, and in some cases, the resistance during insertion may cause the electrical components to become misaligned, and in extreme cases, there is a risk of damaging the fragile parts of the fluorescent lamp. .

しかも、外観上、ならびにランプ性能上、熱収縮チュー
ブはバルブ外表面に密接することが望ましいが、熱収縮
チューブが長いので、熱収縮チューブとバルブとの間に
多くの空気が介在しやすく、均一に密着しにくい。
Furthermore, from the standpoint of appearance and lamp performance, it is desirable for the heat shrink tube to be in close contact with the outer surface of the bulb, but since the heat shrink tube is long, it is easy for a lot of air to be interposed between the heat shrink tube and the bulb, making it evenly distributed. Difficult to adhere to.

この発明はこのような事情に着目してなされたもので、
その目的とするところは、バルブとの間に空気が入るの
を防ぎつつ、熱収縮チューブの装着作業を容易に行なう
ことができる放電灯を提供することにある。
This invention was made with attention to these circumstances,
The purpose is to provide a discharge lamp that allows easy installation of a heat shrink tube while preventing air from entering between the lamp and the bulb.

〔発明の構成〕[Structure of the invention]

(問題点を解決するための手段) 上記目的を達成するために、この発明の放電灯は、熱収
縮チューブをバルブの管軸方向に対して複数に分割する
(Means for Solving the Problems) In order to achieve the above object, in the discharge lamp of the present invention, the heat-shrinkable tube is divided into a plurality of parts in the tube axis direction of the bulb.

(作用) この発明の放電灯によると、分割により熱収縮チューブ
は全長の短いチューブの組合わせとなる。つまり、バル
ブに挿入する熱収縮チューブは長さが短くてすむように
なる。それ故、全長が短くなった分、小さな抵抗で容易
に、また電気部品の位置ずれも少なく熱収縮チューブを
バルブに挿入できるようになる。また熱収縮チューブを
熱収縮させる際でも、同様な理由でバルブと熱収縮チュ
ーブとの間に空気が残る外観上の見苦しさを防ぐことが
できる。
(Function) According to the discharge lamp of the present invention, the heat-shrinkable tube is divided into a combination of tubes having a short overall length. In other words, the length of the heat shrink tube inserted into the valve can be shortened. Therefore, since the overall length is shortened, the heat shrink tube can be easily inserted into the valve with small resistance and with less misalignment of electrical parts. Further, even when heat-shrinking the heat-shrinkable tube, it is possible to prevent the unsightly appearance of air remaining between the bulb and the heat-shrinkable tube for the same reason.

(実施例) 以下、この発明を第1図および第2図に示す一実施例に
もとづいて説明する。第1図および第2図は例えば車両
用表示装置に用いられるバックライト用の蛍光ランプ(
放電灯)を示し、1はバルブである。バルブ1は、例え
ば石英、硬質ガラス、軟質ガラスなどのチューブを曲げ
成形により、略環状に形成してなる。そして、この互い
に対向するバルブ1の端部に、該バルブ端間を渡るよう
にして箱状の口金1aが設けられている。なお、口金1
aには図示はしないがコネクタ部品が内蔵されている。
(Example) The present invention will be described below based on an example shown in FIGS. 1 and 2. FIGS. 1 and 2 show, for example, fluorescent lamps for backlights used in vehicle display devices.
discharge lamp), and 1 is a bulb. The bulb 1 is formed by bending and forming a tube of quartz, hard glass, soft glass, etc. into a substantially annular shape. A box-shaped mouthpiece 1a is provided at the ends of the valves 1 facing each other so as to cross between the ends of the valves. In addition, base 1
Although not shown in the figure, a connector component is built-in.

またバルブ1の内周面には蛍光体被膜2が設けられてい
る。さらにバルブ1の両端部内には、上記口金1aとリ
ード線3aを介してつながる内部電極3.3が設けられ
ている。またさらにバルブ1内には、放電ガスとして所
定量の水銀と希ガス(キセノン、クリプトン、アルゴン
Further, a phosphor coating 2 is provided on the inner peripheral surface of the bulb 1. Furthermore, internal electrodes 3.3 are provided within both ends of the bulb 1, and are connected to the base 1a via lead wires 3a. Further, inside the bulb 1, a predetermined amount of mercury and a rare gas (xenon, krypton, argon) are contained as discharge gas.

ネオン、ヘリウム等の少なくとも一種類)が封入されて
おり、放電により発生した紫外線による蛍光体被膜2の
励起発光で、内部から可視光線を放射させることができ
るようにしている。
At least one type of neon, helium, etc.) is sealed, and visible light can be emitted from inside when the phosphor coating 2 is excited and emitted by ultraviolet rays generated by discharge.

こうしたバルブ1の外表面の全体に、帯状のヒータ4が
管軸方向に沿って配置されている。そして、バルブ1の
外表面に、二分割された透光性(透明)の熱収縮チュー
ブ5a、5bが略全長に渡り装着され、上記ヒータ4を
固定している。すなわち、いずれも熱収縮チューブ5a
、5bには、例えばバルブ1の端部からバルブ中央まで
の距離より、やや長くした寸法に設定したものが用いら
れている。そして、一つはバルブ1の一方の端部から、
口金1aの端壁外面1bと合致する地点が終端となるよ
うに挿入した後、バルブ端側から加温して熱収縮させる
ことで、バルブ1の外表面を被覆している。また残る一
つは、その後、今度はバルブ1の口金18の他方の端壁
外面ICと合致する地点が終端となるように挿入した後
、バルブ端側から加温して熱収縮させることで、バルブ
1の外表面を被覆している。つまり、全長が短い二片の
熱収縮チューブ5a、5bを相互が中央で重なるように
組合わせて、バルブ1の外表面にヒータ4を動かないよ
う押し付けている。
A band-shaped heater 4 is arranged over the entire outer surface of the bulb 1 along the tube axis direction. Then, on the outer surface of the bulb 1, two divided translucent (transparent) heat shrinkable tubes 5a and 5b are attached over substantially the entire length, and the heater 4 is fixed. That is, both are heat shrinkable tubes 5a.
, 5b are set to have dimensions slightly longer than the distance from the end of the bulb 1 to the center of the bulb, for example. And one from one end of valve 1,
The outer surface of the bulb 1 is coated by inserting the bulb 1a such that the termination point is a point that coincides with the outer surface 1b of the end wall of the cap 1a, and then heating it from the bulb end side to cause the bulb to shrink. The remaining one is to insert the valve 1 so that the end is at a point that matches the outer surface IC of the other end wall of the cap 18, and then heat it from the end of the valve to cause it to shrink. The outer surface of the valve 1 is coated. That is, two pieces of heat shrinkable tubes 5a and 5b having a short overall length are combined so that they overlap in the center, and the heater 4 is pressed against the outer surface of the bulb 1 so as not to move.

なお、4’ aは口金1aにつながるヒータ4のリード
線である。
Note that 4'a is a lead wire of the heater 4 connected to the base 1a.

しかして、こうして構成された蛍光ランプに熱収縮チュ
ーブ5a、5bを装着するときは、−片となる熱収縮チ
ューブ5aを、ヒータ4を外表面上に配置したバルブ1
の一方の端部から挿入する。
When attaching the heat-shrinkable tubes 5a and 5b to the fluorescent lamp constructed in this manner, the heat-shrinkable tube 5a is attached to the bulb with the heater 4 disposed on the outer surface.
Insert it from one end.

この際、従来に比べて、かなりチューブ全長が短いので
、小さな挿入抵抗で挿入できるようになる。
At this time, since the total length of the tube is considerably shorter than in the past, it can be inserted with less insertion resistance.

つまり、容易に熱収縮チューブ5aが挿入できることと
なる。
In other words, the heat shrink tube 5a can be easily inserted.

ついで、口金1aの端壁外面1bと対応する地点に、熱
収縮チューブ5aの終端を合せる。そして、位置決めを
終えたならば、その熱収縮チューブ5aをバルブ端側の
位置からバルブ中央側に向う方向に沿って徐々に加温し
ていく。すると、熱収縮チューブ5aは、該チューブ5
aとバルブ1との間から空気を逃しながら熱収縮してい
く。
Next, the terminal end of the heat-shrinkable tube 5a is placed at a point corresponding to the outer surface 1b of the end wall of the base 1a. After the positioning is completed, the heat-shrinkable tube 5a is gradually heated in a direction from the end of the valve toward the center of the valve. Then, the heat shrink tube 5a
Heat shrinks while air is released from between a and valve 1.

こうした際、空気が熱収縮チューブ5aとバルブ1との
間に残ることが懸念される。しかし、チューブ全長が短
いので、空気が排除しやすい。しかるに、熱収縮チュー
ブ5aとバルブ1との間に空気が残るのを防ぐことがで
きることとなる。
In such a case, there is a concern that air may remain between the heat shrink tube 5a and the bulb 1. However, since the total length of the tube is short, air can be easily eliminated. However, it is possible to prevent air from remaining between the heat shrink tube 5a and the bulb 1.

こうした熱収縮により、バルブ1の図において右側に有
るヒータ部分が固定されていく。
Due to such thermal contraction, the heater portion on the right side of the bulb 1 in the figure is fixed.

そして、熱収縮チューブ5aの装着が終えたならば、今
度は残る熱収縮チューブ5bを、口金1aの端壁外面I
Cと対応する地点に終端が合うように、バルブ1の他方
の端部から挿入していく。
After the heat-shrinkable tube 5a has been attached, the remaining heat-shrinkable tube 5b is attached to the outer surface of the end wall of the base 1a.
Insert from the other end of the valve 1 so that the end matches the point corresponding to C.

ついで、熱収縮チューブ5bをバルブ端側の位置からバ
ルブ中央側に向う方向に沿って徐々に加温していく。す
ると、熱収縮チューブ5bは、該チューブ5bとバルブ
1との間から空気が逃げながら熱収縮していく。これに
より、先の熱収縮チューブ5aのときと同様、容易な作
業、ならびに空気の介在を防ぎつつ、バルブ1の図にお
いて左側に有るヒータ部分を固定していく。
Next, the heat-shrinkable tube 5b is gradually heated in a direction from the end of the bulb toward the center of the bulb. Then, the heat-shrinkable tube 5b heat-shrinks while air escapes from between the tube 5b and the bulb 1. With this, the heater portion on the left side of the valve 1 in the figure is fixed while making the work easier and preventing air from intervening, as in the case of the heat shrink tube 5a described above.

か(して、従来に比べて、熱収縮チューブ5a。(The heat shrink tube 5a is different from the conventional one.)

5bの装着作業を容易にできる。しかも、全長が短い分
、熱収縮チューブ5a、5bはバルブ1の外周に均一に
密着しやすいので、外観上の見苦しさを防止、ならびに
ランプ性能の向上を図ることができる。そのうえ、熱収
縮チューブ5a、5bは挿入抵抗が小さいから、熱収縮
チューブ5a。
5b can be installed easily. Furthermore, since the heat-shrinkable tubes 5a and 5b are short in overall length, it is easy to uniformly adhere the heat-shrinkable tubes 5a and 5b to the outer periphery of the bulb 1, thereby preventing an unsightly appearance and improving lamp performance. Moreover, since the heat-shrinkable tubes 5a and 5b have low insertion resistance, the heat-shrinkable tube 5a is preferred.

5bの装着作業によるヒータ4の位置ずれ、バルブ1の
脆弱部分の破損を防ぐことができる。
Displacement of the heater 4 and damage to the fragile portion of the valve 1 due to the installation work of the valve 5b can be prevented.

またこうしたことに加え、分割した一片の熱収縮チュー
ブ5aをバルブ1の一端側を基準として装着し、残る熱
収縮チューブ5bをバルブ1の他端側を基準として装着
して、双方の端部をバルブ1の中央部分で重ね合せるよ
うにした被覆構造は、熱収縮によってずれるチューブ端
の位置を組合部6で許容するので、どのように熱収縮チ
ューブ5a、5bの収縮(管軸方向)がばらついたとし
ても、所望とするバルブ端間(本実施例では口金1aを
ループする部分全て)を露出なく被覆することができる
In addition to this, a piece of divided heat shrink tube 5a is attached to one end of the bulb 1 as a reference, and the remaining heat shrink tube 5b is attached to the other end of the bulb 1 as a reference, so that both ends are connected. The covering structure overlapped at the center of the bulb 1 allows the position of the tube end to shift due to heat shrinkage at the joining part 6, so it is difficult to determine how the shrinkage (in the tube axis direction) of the heat shrink tubes 5a and 5b varies. Even in this case, it is possible to cover the desired end portions of the bulb (in this embodiment, the entire portion looping around the cap 1a) without being exposed.

なお、一実施例では二分割にした熱収縮チューブを上げ
たが、これに限らず、三分割以上に熱収縮チューブを分
割するようにしてもよい。また一実施例では、環形の放
電灯にこの発明を適用したが、むろんそれ以外の直管、
0字管等といった形状の放電灯に適用してもよい。
In one embodiment, the heat-shrinkable tube is divided into two parts, but the present invention is not limited to this, and the heat-shrinkable tube may be divided into three or more parts. In addition, in one embodiment, the present invention was applied to a ring-shaped discharge lamp, but of course other straight tubes,
The present invention may also be applied to a discharge lamp having a shape such as a 0-shaped tube.

[発明の効果コ 以上説明したようにこの発明によれば、バルブに対し挿
入する熱収縮チューブが全長が短くなるので、小さな抵
抗で熱収縮チューブをバルブに挿入できる。また熱収縮
チューブを熱収縮させる際でも、同様な理由でバルブと
熱収縮チューブとの間の空気が逃げやすく、熱収縮チュ
ーブがバルブの外周に均一に密着しやすくなる。
[Effects of the Invention] As explained above, according to the present invention, the total length of the heat-shrinkable tube inserted into the bulb is shortened, so that the heat-shrinkable tube can be inserted into the bulb with small resistance. Further, when heat-shrinking the heat-shrinkable tube, air between the bulb and the heat-shrinkable tube tends to escape for the same reason, and the heat-shrinkable tube tends to adhere uniformly to the outer periphery of the bulb.

それ故、外観上の見苦しさの防止、ならびにランプ性能
の向上を図りつつ、熱収縮チューブの装着作業を容易に
行なうことができる。しかも、熱収縮チューブの挿入抵
抗が小さくてすむので、電気部品の位置ずれが少なく、
また放電ランプの脆弱部を破損させるようなことはなく
なる。
Therefore, it is possible to easily attach the heat shrink tube while preventing an unsightly appearance and improving lamp performance. Moreover, since the insertion resistance of the heat shrink tube is small, there is less misalignment of electrical components.
Further, there is no possibility of damaging the fragile parts of the discharge lamp.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図および第2図はこの発明の一実施例を示し、第1
図は放電灯全体の構成を示す正面図、第2図はその第1
図中、A−A線に沿う断面図である。 1・・・バルブ、4・・・ヒータ(電気部品)、5a。 b・・・熱収縮チューブ。
FIG. 1 and FIG. 2 show one embodiment of the present invention.
The figure is a front view showing the overall configuration of the discharge lamp, and Figure 2 is the first part of the discharge lamp.
It is a cross-sectional view taken along line A-A in the figure. 1... Valve, 4... Heater (electrical component), 5a. b...Heat shrink tube.

Claims (1)

【特許請求の範囲】[Claims] バルブに透光性の熱収縮チューブを被覆し、当該チュー
ブの熱収縮により前記バルブの外表面に配置した電気部
品を固定してなる放電灯において、前記熱収縮チューブ
を前記バルブの管軸方向に対して複数に分割したことを
特徴とする放電灯。
In a discharge lamp in which a light-transmitting heat-shrinkable tube is covered with a light-transmitting heat-shrinkable tube, and electrical components arranged on the outer surface of the bulb are fixed by heat-shrinking the tube, the heat-shrinkable tube is oriented in the tube axis direction of the bulb. A discharge lamp characterized by being divided into multiple parts.
JP23530688A 1988-09-20 1988-09-20 Discharge lamp Pending JPH0286044A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23530688A JPH0286044A (en) 1988-09-20 1988-09-20 Discharge lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23530688A JPH0286044A (en) 1988-09-20 1988-09-20 Discharge lamp

Publications (1)

Publication Number Publication Date
JPH0286044A true JPH0286044A (en) 1990-03-27

Family

ID=16984162

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23530688A Pending JPH0286044A (en) 1988-09-20 1988-09-20 Discharge lamp

Country Status (1)

Country Link
JP (1) JPH0286044A (en)

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