JPH031781B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a novel electric lamp with a base. Specifically, the main part of the mouthpiece can be molded from synthetic resin, improving dimensional accuracy and productivity, as well as making it easier to align the filament. The aim is to provide a light bulb with a base.

BACKGROUND ART AND THE PROBLEMS Various types of light bulbs with bases have been proposed and put into use. The cap portion of a conventional bulb with a cap is formed by drawing a metal material. However, the axial length of the base of a light bulb is larger than its diameter.
The processing involves deep drawing, which has poor workability and is likely to result in wasted material and poor molding. Furthermore,
Since it is a deep drawing process, it is necessary to use high-grade materials with high extensibility, which causes the price of the light bulb itself to rise.

Purpose of the Invention The present invention has been made in view of the above-mentioned conventional problems, and improves dimensional accuracy and production by making it possible to mold the main part of the mouthpiece from synthetic resin. It is an object of the present invention to provide a novel light bulb with a cap, which has improved properties and also allows easy alignment of the filament.

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the light bulb with a cap of the present invention is composed of a glass bulb with a filament sealed inside and a cap part, and the cap part includes a cylindrical body made of synthetic resin and a cylindrical body made of synthetic resin. A metal tube connected to the tip,
and a holding plate having an outer diameter large enough to be slidably fitted into the metal cylinder, and the glass bulb is mainly supported by the holding plate, and the holding plate is welded or attached to the metal cylinder. It is characterized by being fixed by soldering.

Therefore, according to the present invention, since the cylinder body, which is the main part of the mouthpiece, is made of synthetic resin, molding is possible, the molding cost can be significantly reduced, and the dimensional accuracy is improved. , the rate of occurrence of molding defects can also be reduced. Furthermore,
Since the holding plate has an outer diameter large enough to be slidably fitted into the metal cylinder, the glass bulb can be moved relative to the cylinder body to align the filament with the cylinder body. becomes easier.

EXAMPLES The details of the light bulb with base of the present invention will be described below with reference to illustrated examples. In addition, the illustrated embodiment is as follows:
1 shows an application of the present invention to a halogen light bulb used as a light source for an automobile headlamp.

1 is a glass bulb of a halogen light bulb. 2 is a hermetically sealed glass container whose one end is closed with a pinch seal part 3 and the other end is closed with an exhaust part 4. 5,
5, . . . are lead wires that pass through the pinch seal portion 3 and are held at intermediate portions by the pinch seal portion 3. Reference numerals 6 and 6 denote glass bridges, which are welded to sandwich the lead wires 5, 5, . . . from both sides inside the glass container 2. Further, filaments 7, 7 are stretched between the tips of appropriate lead wires 5, 5, . . . . The pinch seal part 3 has a substantially flat shape, and protrusions 8, 8,... are formed on both sides in the width direction, and the cross-sectional shape is substantially I-shaped. Engaging protrusions 9, 9 are formed approximately at the center of both sides of the seal portion 3. As shown in FIG. still,
The sealed glass container 2 is filled with an inert gas and a suitable halogen gas. The glass bulb 1 is formed as described above.

10 is a glass bulb holding plate. The glass bulb holding plate 10 is made of a metal plate having spring elasticity, and has a substantially circular planar shape.
A short cylindrical ring section 11 is formed from the periphery of the glass bulb holding plate 10. The holding surface 12 of the holding plate 10 has two pairs of intermediate holding pieces 13, 13, 13, 13 and two pairs of side holding pieces 1.
4, 14, 14', and 14' are formed in a cut and raised shape. Intermediate holding pieces 13 and 13 and 13 and 13
are formed to face each other, and the holding surface 12
downwards (bottom edge of drawing paper in Figures 7 and 9)
It is bent toward the end and is inclined so that the tips 15 and 15 and 15 and 15 approach each other. The side holding pieces 14 and 14 and 14' and 14' are formed to face each other, and are directed upward from the holding surface 12 and from the tips 16 and 16 and 16' and 1
6' are inclined and bent so that they approach each other. And these presser pieces 13, 13,
There are slits 17, 17, 17 and 17, 17, 1 between each of 13, 13, 14, 14, 14', 14' to give more elasticity to these presser pieces.
7 is formed. In addition, the side holding pieces 14,1
Spaces 18, 18 are formed outside of 4 and 14', 1', and these spaces 18, 18 are continuous with the space formed by forming each of the presser pieces. Therefore, a space is formed which has a substantially I-shape corresponding to the cross-sectional shape of the pinch seal portion 3 of the glass bulb 1 of the light bulb when viewed from above.

Therefore, the glass bulb 1 has its pinch seal portion 3
is the holding piece 1 of the glass bulb holding plate 10 from above.
3 and 13, 13 and 13, 14 and 14, 14' and 1
4', the upper ends 16, 16, 1 of the holding pieces 14, 14, 14',
6' and 16' are inserted until they touch the lower end of the sealed glass container 2. In this state (as shown in FIG. 9), the intermediate holding pieces 13, 13, 13, 13 are
The tip portions 15, 15, 15, 15 are the holding surfaces 12
It comes into elastic contact with the sides of the intermediate portion of the pinch seal portion 3 of the glass bulb 1 from both sides below. At this time, the outer side edges of the side pressing pieces 14, 14, 14', 14' are brought into contact with the mutually opposing side surfaces of the protrusions 8, 8 of the pinch seal portion 3. Also, the intermediate presser piece 1
3, 13, 13, 13 tip 15, 15, 15,
15 engages with the upper surfaces of engagement protrusions 9, 9 formed on the side surfaces of the pinch seal portion 3, thereby preventing the glass bulb 1 from coming off from the glass bulb holding plate 10.

Reference numeral 19 denotes a cylinder body, which is molded from synthetic resin. This cylinder body 19 has a substantially cylindrical shape, and is divided into a glass bulb holding part 21 and a connector part 22 by a partition wall 20 provided in the middle part. The partition wall 20 has terminal mounting holes 23,
23, 23 (only two are shown in the drawing)
is formed. Further, a flange 24 extending outward is integrally formed on the outer peripheral surface of the cylinder body 19, and positioning notches 25, 25, 25 are formed on the outer peripheral edge of the flange 24. There is. 26 is an annular fitting groove formed on the outer peripheral surface of the cylinder body 19 at a position forward of the flange 24, and a sealing material such as an O ring is attached to the fitting groove 26, This contributes to waterproofing between the tube body 19 and the lamp body when the light bulb is attached to the lamp body.

The tip of the cylinder body 19 is a narrow diameter portion 27 whose outer diameter is slightly reduced, and the outer peripheral surface of the narrow diameter portion 27 is provided with small recesses 2 at several locations, for example, four locations.
8, 28, . . . are formed.

Reference numeral 29 denotes a metal cylinder, which has an inner diameter that allows it to fit into the narrow diameter portion 27 of the cylinder body 19. Further, at the front end of the metal cylinder 29, there are several pieces, for example, 6 to 8 pieces.
Small projecting pieces 30, 30, . . . are integrally provided to protrude toward the front. The inner diameter of the metal tube 29 is formed to a size that allows the annular portion 11 of the glass bulb holding plate 10 described above to be slidably fitted therein. The metal tube 29 is fitted onto the narrow diameter portion 27 of the tube body 19, and the recess 29 formed in the narrow diameter portion 27 remains in the fitted state.
8, 28, ... in the recesses 28, 2.
8. Protrude toward..., thereby,
A metal tube 29 is fixed to the tube body 19. In the above explanation, the recesses 28 and 2 are first formed on the cylinder body 19.
Although it has been described that the recesses 28, 28, ... are formed in advance, it is not necessarily necessary to form the recesses 28, 28, ... in advance. By pressing the portions toward the narrow diameter portion 27, the projections 31, 31, . Narrow diameter portion 2 of main body 19
Since the recesses 28, 28, . . . into which the protrusions 31, 31, . You can also do it.

32, 32, 32 are terminals disposed within the connector portion 22 of the cylinder body 19. Each terminal 32
A mounting piece 33 is formed at the base end thereof and is bent at right angles to the main part, and a cylindrical part 34 is formed in the mounting piece 33 so as to protrude toward the side opposite to the main part. Therefore, the mounting pieces 33, 3 of the terminals 32, 32, 32
The cylindrical portions 34, 34, 34 formed in the terminal mounting holes 23, 23, 23 formed in the partition wall 20
is inserted from the connector part 22 side, and the tip of each cylinder part 34, 34, 34 protruding toward the glass bulb holding part 22 side is caulked, whereby the terminal 3
2, 32, 32 are the connector parts 22 of the cylinder body 19
be placed inside.

The glass bulb holding plate 10 holding the glass bulbs 1 as described above is then fixed to the metal tube 29 fixed to the tube body 19, which will be explained below.

That is, the annular portion 11 of the glass bulb holding plate 10
is fitted into the metal tube 29 fixed to the tube body 19. Then, the annular portion 11 is slid against the metal cylinder 29 to adjust the positional relationship between the flange 24 of the cylinder body 19 and the filaments 7, 7 of the glass bulb 1 to be correct, and the filaments 7, 7 Once the positional relationship with the flange 24 is correct, the projections 30, 30, . . . of the metal tube 29 and the annular portion 11 of the glass bulb holding plate 10 are fixed by spot welding. Note that the fixation between the metal tube 29 and the glass bulb holding plate 10 is not limited to fixation by spot welding, but may be done by other fixing means, such as soldering. In the case of soldering, protrusions 30, 3 for spot welding are used.
0,... are unnecessary.

Incidentally, the lead wires 5, 5, .
and soldered to the mounting pieces 33, 33, 33 of the terminals 32, 32, 32.
5 will be given.

In the case of the above-mentioned light bulb with a base 36, since the base part is composed of the synthetic resin cylinder body 19, the metal cylinder 29, and the glass bulb holding plate 10, the lamp base is a part that requires dimensional accuracy, for example, the lamp A portion including the flange 24, which serves as a reference surface when attached to a body or a reflecting mirror, can be formed with extremely high precision. In addition, since deep drawing of metal materials is not required, workability for manufacturing is extremely good, and the rate of forming defects is low.
There is no wastage of materials, and by these things,
Manufacturing costs can be reduced. Furthermore,
Although the tube body 19 made of synthetic resin is used, a metal tube 29 and a glass bulb holding plate 10 are interposed between the glass bulb 1 and the tube body 19, and the tube body 19, which is a synthetic resin component, is Glass bulb 1 that gets hot
Synthetic resin parts 19 due to heat because they do not come in direct contact with
has little impact on

Furthermore, the annular portion 1 of the glass bulb holding plate 10
1 to the metal tube 29 fixed to the tube body 19, the filaments 7, 7 and the flange 2 are removed.
You can adjust the position between 4 and 4.
Positioning of the filaments 7, 7 can be performed extremely simply and easily.

Effects of the Invention As is clear from the above description, the light bulb with a cap of the present invention consists of a glass bulb with a filament sealed inside and a cap part, and the cap part is made of a synthetic resin tube body and the tube body. It consists of a metal cylinder connected to the tip of the main body, and a holding plate having an outer diameter large enough to be slidably fitted into the metal cylinder, and the glass bulb is mainly supported by the holding plate. Additionally, the holding plate is fixed to the metal tube by welding or soldering.

Therefore, according to the present invention, since the cylinder body, which is the main part of the mouthpiece, is made of synthetic resin, molding is possible, the molding cost can be significantly reduced, and the dimensional accuracy is improved. , the rate of occurrence of molding defects can also be reduced. Furthermore,
Because the glass bulb holding plate that holds the glass bulbs can slide against the metal tube fixed to the tube body, it is easy to move the glass bulb relative to the tube body and align the filament with the tube body. It becomes easier.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the light bulb with a base of the present invention, in which Fig. 1 is a perspective view of the whole, Fig. 2 is an exploded perspective view of the whole, Fig. 3 is a side view of the glass bulb, and Fig. 4 is a perspective view of the whole. Cross-sectional views taken along line A-A in Figure 3, Figures 5 to 7
The figures show the glass bulb holding plate, Fig. 5 is a plan view, Fig. 6 is a side view, Fig. 7 is a sectional view taken along line B-B in Fig. 5, and Fig. 8 is a glass bulb holding plate. FIG. 9 is a perspective view of the glass bulb attached to the plate, FIG. 9 is an enlarged sectional view of the main part showing the state of connection between the glass bulb and the glass bulb holding plate, and FIG. 10 is a side view of the whole, partially shown in longitudinal section. . Explanation of symbols 1...Glass bulb, 7...Filament, 10...Holding plate, 19...Cylinder body, 29...
metal tube.

Claims (1)

[Claims] 1 Consists of a glass bulb with a filament sealed inside and a cap part, where the cap part is made of a synthetic resin tube body, a metal tube connected to the tip of the tube body, and is slidable with respect to the metal tube. and a holding plate having an outer diameter large enough to fit into the glass bulb, and the glass bulb is mainly supported by the holding plate, and the holding plate is fixed to the metal tube by welding or soldering. A light bulb with a base featuring the following.