JPS58103760A - Fluorescent lamp - Google Patents

Abstract

PURPOSE:To enable the reduction of the intensity of the outer curved parts of a bulb to be made small without creasing the inner sides of curved parts by adjusting the ratio of the curvature radius (R) of the outer sides of the curved parts to the outer diameter (d) of the tube to over 1.7 CONSTITUTION:In the figure, the shaded part indicates an area in which the inner sides of curved parts 4, 5 and 6 of a bulb 1 having an outer diameter (d) of 25-32mm. are not creased, the reduction of glass intensity caused by the expansion of the outer sides of the parts 4, 5 and 6 is small enough not to cause any practical harm, and any defective appearance which might be caused by cracks or separations of a phosphor film 2 provided on the outer sides of the parts 4, 5 and 6 is prevented when the curvature radius (R) of the outer sides of the parts 4, 5 and 6 is varied from 45mm. to 55mm.. In such a range as above, the outer diameter (d) and the curvature radius (R) of the outer sides of the parts 4, 5 and 6 satisfy the relationship represented by the equation R/d>=1.7.

Description

【発明の詳細な説明】 この発明は、管外径２５〜３２酩の直線状したパルプを
同一平面上に３ケ所または４ケ所屈曲させ四角形の環を
形成したけい光ランプに関するもので、目的とするとこ
ろは、バルブ強度低下の軽減および外観不良をなくした
けい光ランプを提供することにある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluorescent lamp in which a rectangular ring is formed by bending a straight pulp having an outer diameter of 25 to 32 mm on the same plane at three or four places. The purpose of this invention is to provide a fluorescent lamp that reduces the reduction in bulb strength and eliminates appearance defects.

けい光ランプのパルプを多角形、特に四角形状に形成し
てコンパクト化を図り、包装資材の節約や物流費の低減
、あるいは従来のけい光ランプが形状的な制約から利用
されていない分野への進出などが試みられている。By forming the pulp of fluorescent lamps into polygonal, especially rectangular, shapes to make them more compact, we can save on packaging materials, reduce logistics costs, and apply them to fields where conventional fluorescent lamps are not used due to their shape limitations. Attempts are being made to expand into the country.

しかるに、一般照明用のけい光ランプは、始動および効
率の面からパルプの管外径は２５〜３２朋の範囲のもの
が多いが、このパルプを四角形に形成すると、屈曲部が
直角に曲は加工される為、屈曲部の内側にシワが発生し
、残留歪によるパルプの割れを招いたり、外観的にも好
１Ｌ４くないものとなる欠点があった。そこで。However, in fluorescent lamps for general lighting, the outer diameter of the pulp tube is often in the range of 25 to 32 mm from the viewpoint of starting and efficiency, but when this pulp is formed into a rectangular shape, the bent part is not bent at a right angle. Because it is processed, wrinkles occur on the inside of the bent portion, resulting in cracking of the pulp due to residual strain and an undesirable appearance. Therefore.

シワの発生を防止し７ようとして、パルプの屈曲時にパ
ルプを引張りながら屈曲させると、屈曲部の外側がかな
り伸びる。このため屈曲部の肉厚が極端に薄くなってパ
ルプ強度が低下し、けい光ランプが破損し易くなり、ま
た、屈曲部の外側の螢光膜の亀裂や剥れが生じ外観不良
となる問題が発生し、結果的には対策になって因なかっ
た。When the pulp is bent while being stretched in an attempt to prevent wrinkles, the outside of the bent portion stretches considerably. As a result, the wall thickness at the bent part becomes extremely thin, reducing pulp strength, making the fluorescent lamp more likely to break, and causing cracks and peeling of the fluorescent film on the outside of the bent part, resulting in poor appearance. occurred, and in the end no countermeasures were taken.

この発明は上記事情に鑑みてなされたもので管外径ｄが
２５〜３２朋のパルプを３ケＰＪｒまたは４ケ所屈曲さ
せ四角形に形成したけい光ランプにおいて、各屈曲部の
環の外側の曲率半径Ｒと管径ｄとの比率Ｒ／（ｌが１．
７以上になるようにし。This invention has been made in view of the above circumstances, and provides a fluorescent lamp in which a pulp having a tube outer diameter d of 25 to 32 mm is bent at 3 or 4 points to form a rectangular shape. Ratio R/(l is 1.
Make sure it's 7 or higher.

屈曲部の内偵１をシワにすることなく、′ｆた屈曲部の
外側のバルブの伸ひを少なくして肉厚が極端に薄くなる
ことを防ぐことによってバルブ強度の低下を軽減し、さ
らに環外側の螢光膜の亀裂や剥れによる外観不良をなく
したけい光ランプを提供するものである。By reducing the expansion of the bulb on the outside of the bent part and preventing the wall thickness from becoming extremely thin, the reduction in the strength of the bulb is reduced, and the inner wall of the bent part is not wrinkled. To provide a fluorescent lamp which is free from poor appearance due to cracks or peeling of the outer fluorescent film.

以下、この発明の一実施例について第１図。Hereinafter, FIG. 1 shows an embodiment of the present invention.

第２図に基づいて説明する。This will be explained based on FIG.

第１図において、（１）は内面に螢光膜（２）を被着し
１両端部に電極（３）を封着したパルプで、このパルプ
ｉ１１は直線形状したものを所定間隔をおいて同一平面
上の直角方向に、環の外側が夫々半径Ｒの曲率で折曲さ
れた屈曲部＋４１．　＋５１．　＋６１を形成するとと
もに９両端部を近接させた四角形の環を呈している。In Fig. 1, (1) is a pulp with a fluorescent film (2) coated on the inner surface and electrodes (3) sealed on both ends of the pulp. A bent portion +41. where the outer side of the ring is bent with a radius R of curvature in a right angle direction on the same plane. +51. It forms a square ring with +61 and 9 both ends close together.

第２図は管外径ｄと屈曲部１４１．　ｆ５＋、　（６１
の外側の曲率半径Ｒとの関係を示したもので９図中斜線
の部分が管外径ｄが２５から３２闘のバルブｆｉｌにつ
いて上記屈曲部＋＜＋、　ｆ５＋、　（６１において、
各屈曲部１４＋、　（５１，（６１の外側の曲率半径Ｒ
を４５龍から５５朋まで種々変化させて、各屈曲部（４
）。FIG. 2 shows the tube outer diameter d and the bent portion 141. f5+, (61
The shaded area in Figure 9 shows the relationship between the outer radius of curvature R and the bent portion +<+, f5+, (in 61,
Each bent part 14+, (51, (outside radius of curvature R of 61
By varying the angle from 45 dragons to 55 stars, each bent part (4
).

（５１，（６１の内側１をシワにすることなく、シかも
その屈曲部＋４１．　（５１，（６１外側の伸びによる
ガラス強度の低下を実用上支障のない程度にし、また屈
曲部ｆ４１．　（５１，＋６１の外側の螢光膜（２）の
亀裂や剥れによる外観不良の発生しない領域を示してい
る。(51, (Without making the inner side 1 of 61 wrinkled, the bending part +41. 51 and +61, where no appearance defects occur due to cracks or peeling of the outer fluorescent film (2).

この範囲は管外径ｄと屈曲部＋４１．　（５１，（６１
の外側の曲率半径Ｒとの関係がＲ／ｄ〉１．　ｒの式で
表わされる。This range is the pipe outer diameter d and the bent part +41. (51, (61
The relationship with the outer radius of curvature R is R/d〉1. It is expressed by the formula r.

具体的には管外径２９間で、内面に螢光膜を被着し、パ
ルプ両端部に電極を封着した直線状のパルプを四角形に
形成する為に屈曲部の外（ｉｌｌの曲率半径を５０玉に
［７て折曲したけい光ランプは、屈曲部の外側のバルブ
の強度は従来の円形ランプのパルプ強度とほぼ同じに維
持でき。Specifically, in order to form a straight pulp into a rectangular shape with a fluorescent film coated on the inner surface and electrodes sealed on both ends of the tube, the radius of curvature of In the fluorescent lamp bent into 50 bulbs, the intensity of the bulb outside the bend can be maintained almost the same as the pulp intensity of the conventional circular lamp.

また屈曲部の外側の螢光膜の亀裂や剥れはほとんど見ら
れなかった。In addition, almost no cracks or peeling of the fluorescent film outside the bent portion was observed.

なお屈曲部＋４１．（５１，＋６１は上記実施例のよう
に３ケ所に限らず、４ケ所設け、バルブ両端部を画線部
で対向させたものであっても同様な効果を奏する。Note that the bent portion is +41. (51 and +61 are not limited to three locations as in the above embodiment, but may be provided at four locations, and the same effect can be obtained even if the valve ends are opposed to each other at the image line portions.

以上説明したようにこの発明は、管外径ｄが２５〜３２
　ｍｌのバルブを直線部と屈曲部とによって四角形の環
を形成したけ（４光ランプにおいてこのパルプの各屈曲
部の外側の曲率半径Ｒを。As explained above, in this invention, the tube outer diameter d is 25 to 32.
A rectangular ring is formed by a straight part and a bent part of a ml bulb (in a four-light lamp, the radius of curvature of the outside of each bent part of this pulp is R).

上記管外径ｄとの比率Ｒ／ｌｌが１．１以上になるよう
にしたので、屈曲部の内側をシワにすることなく、　′
また屈曲部外（ｉｌｌのパルプの強要低下を軽減し、ま
た螢光膜の亀裂や剥れによる外観不良をなくしたけい光
ランプを提供できる。Since the ratio R/ll to the tube outer diameter d is set to be 1.1 or more, the inner side of the bent part is not wrinkled.
Further, it is possible to provide a fluorescent lamp in which forced deterioration of the pulp outside the bent portion (ill) is reduced, and appearance defects due to cracks and peeling of the fluorescent film are eliminated.

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

第１図は本発明のけい元ランプの一部切欠断面図、第２
図は管外径ｄと屈曲部曲率半径Ｒとの関係図である。 図中、（１）・・・バルブ、（２）・・・螢光膜、（３
）・・・電極。 ＋４１．　＋５１．　＋６１・・・屈曲部。 代理人　葛　野　信　− ａ１■FIG. 1 is a partially cutaway sectional view of the source lamp of the present invention, and FIG.
The figure is a diagram showing the relationship between the tube outer diameter d and the radius of curvature R of the bent portion. In the figure, (1)... Bulb, (2)... Fluorescent film, (3
)···electrode. +41. +51. +61...Bending part. Agent Shin Kuzuno - a1■

Claims (1)

【特許請求の範囲】[Claims] 管外径ｄが２５〜３２朋の直線状したパルプを同一平面
上に３ケ所または４ケ所屈曲させ四角形の環を形成した
けい光ランプにおいて、上記パルプの各屈曲部の外側の
曲率半径Ｒと管外径ｄとの比率Ｒ／ｃｌが１．７以上で
あることを特徴とするけい光ランプ。In a fluorescent lamp in which a rectangular ring is formed by bending a straight pulp with a tube outer diameter d of 25 to 32 mm at three or four places on the same plane, the outside radius of curvature R of each bent part of the pulp is A fluorescent lamp characterized in that the ratio R/cl to the tube outer diameter d is 1.7 or more.