JPH0260046A - Sprash-proof fluorescent lamp - Google Patents

Abstract

PURPOSE:To improve the moisture resistance of a fluorescent lamp, by sealing a microclearance between the glass tube of the fluorescent lamp and a sprash- proof tube for covering the glass tube by means of a silicone adhesive and the like. CONSTITUTION:A sprash-proof tube 4 is stucked over the outer face of a lamp glass tube 1 in a covering manner by means of thermal contraction. A silicone adhesive is inserted between the sprash-proof tube 4 and the glass tube 1 from opposite end portions of the sprash-proof tube 4 by means of a narrow nozzle gun before thermal contraction, and is then heated by means of a drier so that it contracts and hence the tube 4 is temporarily and partly stucked to the glass tube 1. Next, the whole body of the tube 4 is heated to contract, while the gases sealed therein during the above process are exhausted from a gase exhausting portion 6, 6' and thus the tube 4 is wholly stucked to the glass tube 1. A short-cylindrically-shaped silicone rubber ring having a thickness of 0.2-1.0mm may also be used in place of the adhesive for securing their stucked condition. The moisture resistance of the lamp is thereby improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to measures for preventing deterioration in starting performance of anti-flying fluorescent lamps under high humidity conditions.

[Conventional technology]

As described in Japanese Patent Application Laid-open No. 56-15111, the inner surface of the anti-fly tube has minute irregularities formed with a filler to expel residual air.

[Problem to be solved by the invention]

The above conventional technology takes into consideration the disadvantage that when using or leaving a high-output rapid-start type anti-flying fluorescent lamp under high humidity conditions, moisture enters the tiny gap between the lamp and the anti-flying tube, causing water droplets to accumulate. Although it has been removed,
Under high humidity conditions, the starting performance deteriorated more quickly, causing the problem that the lights would go out in a short period of time.

The object of the present invention is to seal the lamp and the anti-fly tube at both ends of the lamp to prevent moisture from entering, thereby preventing deterioration in starting performance under high humidity conditions.

Another object of the present invention is to provide an effective method for sealing a minute gap between a lamp and an anti-fly tube.

[Means to solve the problem]

In order to achieve the above object, the anti-fly tube is sealed at the end of the tube including the lamp glass tube after being heated and shrunk to prevent moisture from entering between the lamp and the anti-fly tube.

Furthermore, a silicon adhesive or a short cylindrical silicon rubber ring is used as a sealing material to seal between the lamp and the anti-fly tube.

[Effect]

The anti-fly tube that covers anti-fly fluorescent lamps has minute irregularities on its inner surface, and even after heat shrinkage, a minute gap remains between the lamp and the tube, so under high humidity conditions, moisture can enter inside and form water droplets. , starting performance deteriorates. Therefore, by sealing the tube end between the lamp and the anti-fly tube using a sealing material, it is possible to prevent water droplets from adhering to the lamp even under high humidity conditions, thereby preventing deterioration in starting performance.

[Example] Hereinafter, an example of the present invention will be described with reference to FIG. 1st
The figure shows a high-output rapid-start type anti-flying fluorescent lamp.The inner surface of the lamp glass tube 1 is coated with phosphor (not shown), the inside of the tube is evacuated, some inert gas and mercury are filled in, is provided with an electrode (not shown). A starting aid 2 is provided on the surface of the lamp glass tube 1. The above-mentioned auxiliary material 2 is a high-resistance tube wall type (A type) in which a hydrophobic silicone liquid is applied to the entire lengthwise surface of the lamp and baked, and a low-resistance tube wall type (type A) in which an AQ Mylar film is pasted with conductive stripes. M type).

FIG. 1 shows an example of type A, and the illustration of type M is omitted. Caps 3 and 3' are baked onto both ends of the lamp glass tube 1 using cap cement (not shown). 4 is an anti-flying tube made of polyethylene terephthalate heat-shrinkable tube (thickness approx. 100-130μ), passed through a tunnel furnace at 100-120℃ for about 30 seconds from the end of the lamp to heat-shrink it. After that, cut off the excess portion using the R portion of the caps 3, 3'. 5 and 5' are silicone adhesive or short cylindrical silicone rubber rings that are attached to the lamp glass I.
r! It is used to seal between the l and the anti-fly tube 4.

In the above structure, a manufacturing method using a silicon adhesive as a sealing material will be described. First, the anti-fly tube 4 is placed over the lamp tube 1. The tube 4 is 30 to 40!11111 longer at each end than the entire floor of the lamp. Silicone adhesive is injected between the entire circumference of the lamp tube wall at the end of the lamp tube and the anti-fly tube using a φ2III11 nozzle gun, and is applied while rotating the lamp.

The application position is such that it covers the ends of the caps 3 and 3' and the end of the glass tube 1. By doing this, the adhesiveness is good at the rounded part, and the appearance of the adhesive is also good.

After applying the adhesive, the end of the anti-fly tube is partially heated and shrunk using a hair dryer and temporarily fixed as shown in FIG. 2(a).

At this time, as shown in FIG. 2(b), air exhaust portions 6 and 6' are secured when the entire tube is contracted.

When passing through a tunnel furnace to shrink the entire anti-fly tube, if the one end where the tube is temporarily fastened is shrunk last, the air will be discharged from the air discharge section 6°6' without any accumulation. In addition, since the shrinkage of the tube in length and direction is suppressed, the adhesive is crimped onto the tube at a predetermined position with almost no displacement, and the lamp and tube can be sealed.

In addition, the sealing material 5 has a wall thickness of 0.2 to 1. When using a 0mm short cylindrical silicone rubber ring, one with a diameter slightly smaller than the lamp diameter provides good adhesion and prevents misalignment.

First, attach this ring 5 to one end of the lamp by covering the other end with the anti-flying tube so that the tip of the lamp protrudes, attaching the ring to the protruding end, and returning the tube to the specified position.
After that, either use the same temporary fixing method as the adhesive, or make the preliminary tube on the side that will shrink last to a length of 100 to 150 mm in order to make it free from shrinkage in the length direction.

The moisture resistance of the lamp produced by this method is 40'C95.
Very good results were obtained under high humidity conditions of %RH.

Table 1 shows a comparison of the moisture resistance performance of the present invention and a conventional example. No problem will occur if the starting voltage is 200v or less, and conventional anti-flying lamps are 240v.
If the voltage exceeds the power supply voltage, the light will no longer turn on. The two improved types according to the embodiments of the present invention can be turned on at a sufficient electric voltage of 178V and 181V. Here, one combination ballast is ll
This is a commercial ballast with a rated voltage of 200V that complies with 5C8108.

Table 1 [Effects of the Invention] According to the present invention, since the lamp glass tube and the anti-fly tube can be sealed, it is possible to effectively prevent moisture from becoming water droplets and adhering to the surroundings of the lamp even under high humidity conditions. , This can prevent the lamp starting performance from deteriorating.

Regarding the manufacturing method, when using a silicone adhesive, temporary pre-shrinkage is performed to suppress shrinkage in the length direction of the anti-fly tube, so that the silicone adhesive does not deviate from the application position and the overall When deflated, it is crimped onto the tube to ensure a tight seal.

Furthermore, when a short cylindrical silicon rubber ring is used as the sealing material, the sealing material does not protrude and the finish is uniform.

[Brief explanation of the drawing]

FIG. 1 is a front view of a lamp according to an embodiment of the present invention, and FIG. 2 is a front view and an end view of the lamp tube end of an embodiment of the present invention. 1...Lamp glass tube, 2...Starting aid material, 3.3
'...Cap, 4...Flight-proof tube, R...Base R
Section 5, 5'... Sealing material, 6, 6'... Air exhaust part when temporarily tightening the tube. te) Tonzutsuri father-in-law

Claims (1)

[Scope of Claims] 1. In a rapid-type fluorescent lamp having a starting aid on the outer surface of the lamp and covered with a heat-shrinkable anti-fly tube, the lamp and the anti-fly tube are separated from each other at both ends including the lamp glass tube. This anti-fly fluorescent lamp features a sealed space between the flying tubes to prevent moisture from entering. 2. An anti-fly fluorescent lamp in which after the lamp is covered with an anti-fly tube, a silicon adhesive is applied all around the lamp and the anti-fly tube at both ends including the glass tube section before heat shrinking. 3. The anti-fly type according to claim 1, wherein a short cylindrical silicone rubber-like ring with a wall thickness of 0.2 to 1.0 mm is used as a sealing material for maintaining airtightness between the lamp glass tube and the tube. Fluorescent lamp.