JPH03245401A - Bulb base type fluorescent lamp - Google Patents

Abstract

PURPOSE:To absorb the dispersion in the dimensions of opening margin by passing the bulge of the opening end of a globe into the groove formed by the respective slant and angle of the holder and the cover mutually fixed by hooking claws so as to fix the globe. CONSTITUTION:A holder 1, to which a nonlinear fluorescent tube 4 is attached freely in mounting and removal, is fixed to the cover 3 through the hooking claw 11 of the cover 3, and a groove is formed by the slant 10 of the holder 1 and the angle 12 of the cover 3. By passing the bulge 13 at the brim of the opening through this groove, the gloove 2 is fixed. By this constitution, the dispersion in the dimensions of the opening margin of the globe is absorbed, and it becomes the bulb base type fluorescent lamp wherein the economical efficiency is elevated.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a bulb base type fluorescent lamp.

BACKGROUND OF THE INVENTION In a conventional light bulb base type fluorescent lamp, the three-member fixing structure of the glass globe, the cover, and the holder holding the fluorescent tube, which constitute the envelope, is as follows. That is,
A pair of protrusions are formed in the circumferential direction of the inner peripheral surface of the cup-shaped cover, a notch is formed in the brim of the holder, and a protrusion is formed in the neck of the glove. By combining the notch and the protrusion, the above:
(Japanese Unexamined Patent Publication No. 62-252003).

Problems to be Solved by the Invention However, such conventional light bulb base type fluorescent lamps have the following problems.

(1) Providing a fitting protrusion on the neck of a glass globe by secondary molding increases the number of processing steps and causes residual distortion racks due to secondary molding, leading to a decrease in yield. etc., to increase the price of gloves.

(2) In the case of glass globes, dimensional accuracy is difficult to achieve.

Therefore, the finished dimensions of the protrusions and the like vary widely, making it difficult to attach them as expected.

(3) Therefore, when attaching the glove, a large amount of adhesive is used to reinforce the strength, which causes an increase in product weight and cost.

Means for Solving the Problems The bulb A-shaped fluorescent lamp of the present invention includes a glass globe;
An envelope is constituted by a cover whose one end is fixed to the opening of the glove and which has a cap on the protruding part of the other end, and a cap-shaped holder to which a fluorescent tube is fixed is provided inside the envelope. In the light bulb base type fluorescent lamp, a sloped portion whose diameter increases toward the bottom of the holder is formed on the outer peripheral surface of the cap-shaped portion of the holder, and the sloped portion is opposed to the sloped portion on the inner peripheral surface of the opening of the cover, Further, a chevron portion is formed that increases in height from the minimum diameter portion to the maximum diameter portion of the slope portion, and a bulge portion is provided at the opening edge within the groove formed by the slope portion and the chevron portion. The swollen portion of the glove on which the bulge is formed is inserted and passed through, and the swollen portion is fixed by the slope portion and the chevron portion.

Effect: With this configuration, even if there is variation in the open end of the glove, the dimensional variation can be absorbed.

Embodiment A light bulb base type fluorescent lamp according to an embodiment of the present invention has a holder 1, as shown in FIG. Glass globe 2. Cover 3. Non-M linear fluorescent tube4. Ballast 5. Starter 6, light bulb base 7. Temperature fuse8. It is composed of a noise prevention capacitor 9 and the like.

The holder 1 is cap-shaped and has a non-linear fluorescent tube 4 fixed thereto, and a ballast 5 inside. The starter 6 etc. are housed. Holder 1
The outer circumferential surface of the cap-shaped portion of the holder has a plurality of chevron portions 10 whose diameter increases toward the bottom of the holder, and has an elastic structure.

One end of the cover 3 is fixed to the opening of the globe 2 in a structure described later, and a light bulb base 7 is attached to a protrusion on the other end. A chevron portion 12 is formed on the inner peripheral surface of the opening of the cover 3, and a plurality of locking claws 11 for fixing the holder 1 are provided. This chevron portion faces the slope portion 10 and increases in height from the minimum diameter portion to the maximum diameter portion of the slope portion.

A plurality of wedge-shaped protrusions 12 are provided near the open end of the cover 3 for attaching the glove 2.

The glass globe 2 has a swollen portion 13 formed around the entire circumference by cutting with a burner (not shown).

Next, a method of assembling such a light bulb base type fluorescent lamp will be explained. First, non-linear fluorescent tube 4. Ballast 5. When the holder 1 with the starter 6 etc. attached is pushed into the cover 3, the collar of the holder 1 gets caught on the locking claw 11,
Holder 1 is fixed to cover 3.

Next, the bulging part 13 of the globe 2 is inserted into and passed through the circumferential groove formed by the chevron part 12 of the cover 3 and the slope part 10 of the holder 1. Then, the bulging portion 13 is fixed by the chevron portion 12 of the cover 3 and the slope portion 10 of the holder 1.

Regarding the size variation in the diameter of the bulging part 13 of the globe 2, the slope part 10 and the chevron part 12 can be fixed, regardless of whether the opening diameter of the globe 2 is large or small. This allows for fixation.

As described in detail, according to the present invention, variations in the diameter of the opening of the glove can be absorbed, and the glove can be firmly fixed. In addition, unlike conventional methods, the present invention does not require secondary molding for the opening end of the glove, making it easy to process and resulting in a high production yield.
The cost of the globe is reduced, and since the globe can be fixed mechanically, adhesive for fixing the globe is not required, and the cost of the bulb cap type fluorescent lamp can therefore be reduced.

[Brief explanation of drawings]

FIG. 1 is an enlarged cross-sectional view of a light bulb base type fluorescent lamp according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the same, and FIG. 3 is a cross-sectional view of the same essential parts. 1...Holder, 2...Glove, 3.
...Cover 4...Non-linear fluorescent tube, 5.
...Stabilizer, 6...Starter, 7...
...Light bulb cap, 10...Slope part, 1■...
...Latching claw, 12...Chevron section, 13...
...bulge.

Claims (1)

[Claims] An envelope is constituted by a glass globe and a cover whose one end is fixed to the opening of the globe and has a cap on the protruding part of the other end, and a fluorescent tube is fixed inside the envelope. In a light bulb base type fluorescent lamp provided with a cap-shaped holder, a slope portion whose diameter increases toward the bottom of the holder is formed on the outer peripheral surface of the cap-shaped portion of the holder, and on the inner peripheral surface of the opening of the cover, A chevron portion facing the slope portion and increasing in height from a minimum diameter portion to a maximum diameter portion of the slope portion is formed, and an opening is formed in a groove formed by the slope portion and the chevron portion. 1. A light bulb base type fluorescent lamp, characterized in that the bulge part of a globe having a bulge part formed at the edge is inserted and passed through, and the bulge part is fixed by the slope part and the chevron part.