JPS5951701B2 - Method of manufacturing fluorescent lamps - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a fluorescent lamp, and more particularly to a method of manufacturing a rapid-start fluorescent lamp with external conductive stripes.

Conventionally, rapid start fluorescent lamps have been known in which a metal strip is attached to the outer surface of the glass tube of the fluorescent lamp, but the metal strip needs to be attached to the glass tube in order to prevent other dangers to the human body during lighting. In order to do this, an insulating coating was applied to the surface and an adhesive was applied to the joint surface with the glass tube.

However, when bonding such a metal strip to a fluorescent lamp, the bonding agent has a strong bonding force to the surface of the glass tube, but the bonding strength to the metal base is insufficient, or the bonding strength to the metal base is insufficient. Even if it is, it has the disadvantage that there is no electrical connection between the metal strip and the cap because it uses an adhesive.

In addition, in order to prevent electrical continuity between the metal strip and the cap, it was considered that the adhesive at the end of the metal strip could be partially removed and soldered or welded. When both materials are aluminum-aluminum, it is difficult to weld or solder, and the insulating coating on the surface of the metal strip makes the process even more difficult.

Bonding using ultrasonic waves has also been proposed, but in the case of metals laminated with insulators, the bonding function cannot be achieved due to the presence of insulators on the upper and lower fabrics, and this has not been put to practical use. There wasn't.

The non-explosion surface eliminates the above-mentioned conventional drawbacks, simplifies the manufacturing process by eliminating the need for complicated work processes to partially remove the insulating coating on the surface of the metal strip, the adhesive on the back surface, etc., and does not impair starting performance. This provides a method for manufacturing fluorescent lamps.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of essential parts of an example of a fluorescent lamp obtained by the method of the present invention.

In the figure, 1 is a metal strip made of aluminum foil, 2 is a base made of aluminum attached to both ends of a glass tube, and 3 is a glass tube.

FIG. 2 is a cross-sectional view of the main parts of the fluorescent lamp, showing the fluorescent lamp attached and joined to the base 2 and the glass tube 3.

1a is a polyester resin film treated with lamination 1 on the surface of the metal strip 1; 4 is an acrylic adhesive coated on the back side of the metal strip 1; and 5 is an adhesive for bonding the cap 2 and the glass tube 3. .

FIG. 3 is a cross-sectional view of a main part when the metal strip 1 and the base 2 are joined by ultrasonic welding from the surface of the polyester resin film 1a via the adhesive 4.

6 is a horn for ultrasonic welding, and 6a is a horn joint formed by knurling the horn to facilitate welding.

FIG. 4 is a perspective view of essential parts of an apparatus for carrying out the method of the present invention.

1 to 4, a detailed explanation of the present invention will be described.
First, the resin film side of the adhesive-treated polyester citrus laminated metal strip 1 is placed on the cap and the glass tube using an adhesive, with the resin film side facing up and the adhesive side facing down.

Thereafter, as shown in Figs. 3 and 4, the horn joint part 6a of the ultrasonic welding horn is brought into contact with the joint position on the surface of the metal strip 1, and pressure is applied to the pipe shaft in a pressurized state. Weld by applying parallel ultrasonic transverse vibration.

In Fig. 4, 8 is attached to the ultrasonic transducer unit 1, 7 is a column with a built-in pressure cylinder that moves up and down and applies a load in the vertical direction to the tube axis, and 9 and 10 are horn and transducer units. This is a support that supports the vibration at a position that does not affect the vibration, that is, at the vibration valley.

11 is the base. Next, the present invention will be explained in detail.

Example polyester resin film 25μ thick, aluminum foil 3
Using adhesive-treated laminated I aluminum foil with a thickness of 0μ and an acrylic adhesive layer of 25μ and a width of 2mm, the ultrasonic full-wave cuff 00 was applied while applying a load of 10kg to the welded joint.
W, welding machine with a horn tip amplitude of 13 μ, frequency 1.5 k
The aluminum foil was bonded to the base by applying Hz ultrasonic transverse vibration for 1 second.

In this way, by applying ultrasonic transverse vibration, frictional heat is generated between the horn and the cap, and the heat melts and removes the resin film and adhesive layer on the surface, and the bond between the cap and the aluminum foil. In the meantime, aluminum-aluminum fusion welding is performed.

Furthermore, starting performance was not impaired.

In the examples, a polyester film was used as the laminated citrus film, but a resin film such as a polyethylene film or a polypropylene film may be used.

Furthermore, although an acrylic adhesive was used as the adhesive, rubber-based, silicone-based, or other adhesives may also be used.

In addition, a continuous adhesive-treated aluminum foil is pasted on the glass surface 9 and the tip of the horn is equipped with an aluminum foil cutting function, and the aluminum foil is welded to the base and cut at the same time. It is also possible to do so.

When cutting the aluminum foil, it is preferable to cut the aluminum foil at a position as shown in FIG.

If this is done, the aluminum foil will be prevented from peeling off from the cap when packaging the fluorescent lamp into a packaging container or when installing the fluorescent lamp into a lighting fixture, etc.
As a result, the problem of unstable starting voltage is solved.

As explained above, the present invention has the advantage that the metal strip can be joined to the base and the glass tube without requiring the complicated work steps of the conventional method, and the starting performance is not impaired.

[Brief explanation of the drawing]

1 is a perspective view of the main parts of a fluorescent lamp obtained by the method of the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is a sectional view of a joint during welding showing an embodiment of the method of the present invention FIG. 4 is a perspective view of a main part of an apparatus for carrying out the method of the present invention, and FIG. 5 is a diagram illustrating cutting locations of a metal strip. 1... Metal strip, 2... Cap, 3...
... Glass tube, 4 ... Adhesive, 6 ...
・Horn, 8... Ultrasonic transducer Units I.

Claims (1)

[Claims] 1. A metal strip having an insulating coating on one side and an adhesive on the other side is adhered to the outer surface of the glass tube in the axial direction, and is provided at both ends of the metal strip and the glass tube. 1. A method for manufacturing a fluorescent lamp, which comprises joining the cap and the cap while applying ultrasonic transverse vibration parallel to the tube axis and applying a load in a direction perpendicular to the tube axis. 2. The method for manufacturing a fluorescent lamp according to claim 1, wherein the metal strip is made of aluminum. 3. The method for manufacturing a fluorescent lamp according to claim 1, wherein the insulating coating is formed of a polyester citrus film. 4. The method for manufacturing a fluorescent lamp according to claim 1, wherein the adhesive is an acrylic adhesive.