JPS6222007Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a new structure of a light bulb that gives a feeling similar to the flame of a real candle.

[Prior art and its problems]

Conventionally, as this type of light bulb, a glass light bulb as shown in FIG. 1 has been used.

This conventional flame-shaped light bulb uses a known miniature light bulb in the shape of a candle flame, so that it looks like a candle flame when lit, and an internal filament 1.
In order to equalize the light emitted by the tube, a milky white paint is applied to the surface of the tube 2, and lead wires 3, 3 drawn out from the tube 2 are provided along both sides of the stem 4.
On top of that is a candle wick-like color (for example, black).
The electrodes 6, 6 are made by folding back the ends of the lead wires 3, 3.
It had the following shortcomings:

If the bulb part 2 and the stem part 4 are not installed vertically, the light bulb will be tilted when inserted into a candle-shaped lighting fixture, so a considerable degree of installation precision is required in practice. However, it is difficult to achieve high mounting accuracy in glass work, and it is not suitable for mass production.

The joint between the bulb part 2 and the stem part 4 is weak and easily damaged.

On the surface of the round glass rod-shaped stem part 4,
It is difficult to properly secure the lead wire along the stem at a 180° angle.

Therefore, it is difficult to arrange the electrodes 6, 6 correctly, and in this case, even if the light bulb is inserted into the socket of a candle-shaped lighting device, it is likely to cause poor contact with the terminals of the socket.

If paint is simply applied to the surface of the bulb part 2, the light from the filament 1 will not be uniform on the tube surface, and due to uneven coating, pinholes in the paint, etc., it will not look like a candle flame.

The manufacturing cost is relatively high because the external shape is made of glass and the internal filament structure is difficult to mass produce.

[Means for solving problems]

The present invention aims to provide a flame-shaped candle light bulb that does not have such problems, and is constructed as follows.

That is, in the present invention, a mounting base with a concave upper end surface is formed on the upper part of the stem part provided with the bottom cover, and guide grooves continuing to the two through holes provided in the bottom cover are provided on both sides of the lower part of the stem part. At the same time, place a miniature light bulb on the upper end surface of the mount, pass its two lead wires through the through hole, fit into the guide groove and pull it out downwards, cover the tube over it, and insert the lead wires. The lower end is folded back to serve as an electrode, and a cap shaped like a candle flame is attached to the bottom cover.An example of this will be described below with reference to the drawings.

〔Example〕

Fig. 2 is a vertical sectional view of an embodiment of the present invention, Fig. 3 is an exploded perspective view, and 11 is a cap of a flame-shaped case molded into the shape of a candle flame from a translucent resin with good light scattering. part and 12 are the cap part 1
A molded stem part is integrally molded with a bottom cover 13 which fits into the opening of 1, and the cap part 11 and the bottom cover 13 form a flame-shaped case.

A miniature light bulb mount 15 with a concave upper end surface 14 is formed in the upper part of the stem part 12, and the bottom cover 1
Guide grooves 17, 1 following through holes 16, 16 provided in 3
7 are provided on both sides of the bottom.

18 is a known miniature light bulb attached to the upper end surface 14 of the mounting base 15, and the lead wires 19, 19 are connected to the through holes 16, 1.
6, fit into the guide grooves 17, 17 and pull it out downward, then cover the black tube 20 over it to stop the lead wires 19, 19.
The lower ends of are folded back to form electrodes 19a, 19a.

Note that 11a and 13a are ventilation holes, respectively.

The present invention has a mounting base 1 having a concave upper end surface 14 on the top of the stem portion 12 provided with the bottom cover 13 as described above.
5, and a through hole 16,1 provided in the bottom cover 13.
6 are provided on both sides of the lower part of the stem portion 12, and the upper end surface 1 of the mounting base 15 is
Place the miniature light bulb 18 on 4 and connect its lead wires 19, 19.
is passed through the through holes 16, 16, and then the guide groove 1 is inserted into the guide groove 1.
7, 17 and pull it out downward, the tube 20 is placed over it, the lower ends of the lead wires 19, 19 are folded back to form electrodes 19a, 19a, and a candle flame shape is formed on the bottom cover 13. Cap part 1
1, the drawbacks of conventional glass flame-shaped light bulbs are greatly improved as described below.

(a) By making the cap part 11 and the bottom lid 13 that constitute the flame-shaped case made of plastic molded products, it is possible to mass-produce products with higher precision than conventional products made by glass work.

(b) The structure of the present invention eliminates the mechanically fragile joint between the glass tube and the stem.
In addition, conventional products whose entire product is made of glass,
It will definitely be damaged if dropped, but in this case,
This concern is resolved by making the flame-shaped case made of plastic.

(c) Since the guide grooves 17, 17 are provided in the stem portion 12, the lead wires 19, 19 are accurately fixed at predetermined positions.

(d) In the case of conventional glass tubes, it was necessary to apply translucent paint to the surface of the glass tube in order to equalize the light, but by making the cap part 11 made of plastic, it is possible to Even if you do not do this, the light from the built-in light bulb will be scattered, and the entire cap will be illuminated uniformly, eliminating the difficulty of visual inspection due to uneven coating and pinholes. In this way, there are two major advantages: the appearance is improved and a coating step is not necessary.

(e) Compared to conventional glass processing products, it is suitable for mass production, so a significant price reduction can be expected.
In addition, as shown in Figure 1, the conventional product was difficult to manufacture, as the filament 1 inside the bulb had to be pulled up to the tip of the bulb, but as shown in this proposal, it has a miniature light bulb built-in. In the structure,
Any type of light bulb can be used as the built-in light bulb, and those that are mass-produced by automatic machines for use in large quantities in other industrial fields can be used.

(f) Manufacturing costs are low because the lead wire processing work is simple.

[Effect of idea]

As described above, the structure of the present invention has several aspects that make it possible to realize a total manufacturing cost considerably lower than that of a flame-shaped light bulb with a conventional structure, and it also improves the appearance when lit and the ease of manufacturing. Combined with the advantages of its size, it is suitable for the structure of a flame-shaped light bulb. Note that the ventilation holes 11a and 13a in the embodiment are effective as heat radiation holes.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view of a conventional flame-shaped light bulb, and FIG. 2 is a vertical sectional view of an embodiment of the present invention. FIG. 3 is an exploded perspective view thereof. 11...Cap part, 12...Stem part, 13
...Bottom cover, 14...Top end surface, 15...Miniature light bulb mount, 16...Through hole, 17...Guide groove, 18...Miniature light bulb, 19...Lead wire, 20...Black tube.

Claims (1)

[Claims for Utility Model Registration] (1) A mounting base 15 with a concave upper end surface 14 is formed on the upper part of the stem portion 12 provided with the bottom cover 13, and a mounting base 15 with a concave upper end surface 14 is formed in the through holes 16, 16 provided in the bottom cover 13. Continuing guide grooves 17, 17 are provided on both sides of the lower part of the stem portion 12, and a miniature light bulb 18 is placed on the upper end surface 14 of the mounting base 15, and its lead wires 19, 19 are passed through the through holes 16, 16, and then the Guide groove 17,1
7, pull it out downwards, and insert tube 2 on top of it.
0, the lower ends of the lead wires 19, 19 are folded back to form electrodes 19a, 19a, and a cap part 11 formed in the shape of a candle flame is attached to the bottom cover 13. shaped light bulb. (2) The flame-shaped light bulb according to claim 1, which is a utility model, and comprises a flame-shaped case consisting of the cap portion 11 and the bottom cover 13, which is provided with a ventilation hole.