JPH0331002Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a novel light bulb. Specifically, one end of the glass bulb in which the filament is encapsulated is sealed with a substantially flat pinch seal part, and the pinch seal part supports the lead support that supports the filament, and the pinch seal part supports the glass bulb with the cap. In a light bulb that is held in place, the pinch seal part is not damaged when the pinch seal part is held in a holding part such as a cap part, and the light bulb is securely attached to the holding part. The present invention aims to provide a novel light bulb that does this.

Prior Art One end of a glass container body in which a filament is sealed is sealed with a substantially flat pinch seal portion, and a lead support supporting the filament is supported by the pinch seal portion. There is a light bulb that is held in a holding part.

Figures 9 to 11 show examples of glass bulbs for such types of light bulbs.

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 over the tips of appropriate lead wires 5, 5, . . . . The pinch seal part 3 has a substantially flat shape, and has both side parts 8,
Projections 9, 9, . . . are formed on 8, and the cross-sectional shape is approximately I-shaped. Furthermore, engagement protrusions 10 and 1 are provided approximately at the center of both side surfaces 8 and 8 of the pinch seal portion 3.
0 is formed.

Incidentally, an inert gas and a suitable hagelon gas are sealed in the closed glass container 2. The glass bulb 1 is formed as described above.

11 is a glass bulb holding plate. The glass bulb holding plate 11 is made of a metal plate having spring elasticity, and has a substantially circular planar shape.
The peripheral edge of the plate 11 is bent in a step-like manner, and includes a contact surface 12 facing downward and a corresponding contact surface 12.
A caulking edge 13 is formed which is bent downward from the outer peripheral edge of. Also, caulking edge 13
An engaging protrusion 14 is formed at a predetermined location by protruding inward. Holding plate 11
The holding surface 15 has two pairs of intermediate holding pieces 16, 16,
16 and two pairs of side holding pieces 17, 17, 17', 1
7' is formed in a cut and raised shape. The intermediate holding pieces 16 and 16 and 16 and 16 are formed to face each other, are bent downward from the holding surface 15 (toward the lower edge of the drawing paper in FIGS. 5 and 7), and are Tips 18 and 18 and 18 and 1
It is tilted so that 8 approaches. Side holding piece 1
7 and 17, 17' and 17' are formed to face each other, and are bent upward from the holding surface 15 so that the tips 19 and 19 and 19' and 19' approach each other. ing. and,
These pressing pieces 16, 16, 16, 16, 17, 1
7, 17', 17' are provided with slits 20, 2 to give more elasticity to these holding pieces.
0, 20 and 20, 20, 20 are formed. In addition, the side holding pieces 17, 17 and 17', 1
Spaces 21, 21 are formed outside 7',
These spaces 21, 21, and the space formed by forming each of the presser pieces are shaped like an I-shape when viewed from above, corresponding to the cross-sectional shape of the pinch seal portion 3 of the glass bulb 1 of the light bulb. has been done.

Therefore, the glass bulb 1 has its pinch seal portion 3
is the holding piece 1 of the glass bulb holding plate 11 from above.
6 and 16, 16 and 16, 17 and 17, 17' and 1
7', the upper ends 19, 19, 1 of the presser pieces 17, 17, 17', 17'
9'19' is inserted until it contacts the lower end of the sealed glass container 2. In this state (as shown in FIG. 5), the intermediate holding pieces 16, 16, 16, 16 have their tips 18, 18, 18, 18 located below the holding surface 15 at the pinch seal portion of the glass bulb 1. It comes into elastic contact with the middle part of the side parts 8, 8 of No. 3 from both sides. At this time,
The outer side edges of the side holding pieces 17, 17, 17', 17' are the protrusions 9, 9, 9, 9 of the pinch seal part 3.
is in contact with the opposite side of the In addition, the tips 18, 18, 1 of the intermediate presser pieces 16, 16, 16, 16
8 and 18 engage with the upper surfaces of engaging protrusions 10 and 10 formed on the side surfaces 8 and 8 of the pinch seal portion 3, thereby preventing the glass bulb 1 from coming off from the glass bulb holding plate 11. Prevented.

Problems to be Solved by the Invention However, in the case of the glass bulb 1 of the conventional light bulb described above, when the pinch seal portion 3 is held on the glass bulb holding plate 11, the pinch seal portion 3 is ridges 9, 9,
There was a problem with cracks and cracks occurring at or around 9,9.

That is, in the glass bulb 1, the protrusions 9 and 9
The distance between the glass bulbs 1 and 9 is approximately equal to the distance between the side presser pieces 17, 17' of the glass bulb holding plate 11 and the outer edges of 17 and 17'. At the initial stage of the fitting operation with the plate 11, due to slight misalignment between the two, the side presser pieces 17, 17 and 17', 1
The one on either side of 7' is the protrusion 9,9 and 9,9
Then, from this state, the fit between the two becomes deeper, and the side presser piece 17, 17 or 17 that was riding on the protrusion 9, 9 or 9, 9. '17' is the protrusion 9,
9 or 9, 9 and comes into contact with the side parts 8, 8 of the pinch seal part 3, an impact is applied to the side parts 8, 8 and the protrusions 9, 9 or 9, 9, thereby causing the protrusions to Damage called burrs or cracks sometimes occurred on the 9, 9 or 9, 9 or side portions 8, 8.

Purpose of the invention The present invention was developed in view of the above-mentioned problems with conventional light bulbs. In a light bulb in which the lead support supporting the filament is supported by the pinch seal part, and the glass bulb is held in the cap by the pinch seal part, when the glass bulb is held in the cap by the pinch seal part, To provide a new light bulb that is not damaged and can be reliably attached to a holding part.

Summary of the Invention In order to achieve the above-mentioned purpose, the inventive light bulb has one end of a glass bulb containing a filament sealed with a substantially flat pinch seal part, and a lead support supporting the filament in the pinch seal part. In the light bulb, the pinch seal portion supports the glass bulb and holds the glass bulb in the base, in which protrusions are formed on both side edges of the side portion of the pinch seal portion, and the side surface portion between the protrusions on both side edges is formed. An engaging protrusion is formed at a position spaced apart from the glass bulb, and an interval between the opposing surfaces of the protrusions on both sides is formed on the glass bulb holding plate at the end on the glass bulb side, and a pinch seal portion is formed on the glass bulb holding plate. The spacing is equal to the distance between the outer edges of the clamping pieces that clamp the side surfaces of the glass bulb, and the distance gradually becomes wider as the distance from the glass bulb increases.

Function Therefore, according to the present invention, the gap between the opposing surfaces of the protrusions on both side edges is formed on the glass bulb holding plate at the end on the glass bulb side, and the pinching piece that pinches the side surface of the pinch seal part is formed on the glass bulb holding plate. The distance between the outer edges of the glass bulb is equal to the distance between the outer edges of the glass bulb, and the gap gradually becomes wider as the distance from the glass bulb increases. There is no fear that the glass bulb will run over the base, and the above-mentioned problems with conventional light bulbs, that is, the occurrence of cracks and cracks in the pinch seal portion during the operation of holding the glass bulb in the base can be solved.

Embodiments Hereinafter, details of the light bulb of the present invention will be explained according to illustrated embodiments. The illustrated embodiment is an application of the present invention to a halogen light bulb. In addition, the present invention differs from the glass bulb 1 of the conventional light bulb described above except for the protrusions formed along both sides of the side surface of the pinch seal part, and the other parts are the same. The same reference numerals as those used for the glass bulb 1 of the conventional light bulb will be used, and the explanation will be omitted.

In the figure, 22 is a glass bulb of the light bulb according to the present invention.

In the case of this glass bulb 22, mutually opposing side surfaces (opposing surfaces) 24 and 24 of protrusions 23, 23, . and the space between 24 and 24 is narrower at the end on the closed glass container 2 side,
It is inclined so that it becomes wider as it goes away from the closed glass container 2. And protrusions 23, 23,
The distance between the opposing surfaces 24, 24, ... of
7' and the outer edge of 17'.

Therefore, in a state where the pinch seal portion 3 of the glass bulb 22 is completely held by the glass bulb holding plate 11, the side presser pieces 17, 17, 17', 1
Each outer edge of 7' comes into contact with each opposing surface 24, 24, . . . of the protrusions 23, 23, . contribute to and,
At the beginning of the operation for holding the pinch seal part 3 on the glass bulb holding plate 11, the side holding pieces 17, 17,
17', 17' and the opposing surfaces 24, 24, . . . of the protrusions 23, 23, . Part holding piece 17, 17, 17', 1
7' will not ride on the protrusions 23, 23, .
It is possible to prevent the glass bulb 22 from cracking or cracking due to it riding on...

Note that the glass bulb holding plate 11 holding the glass bulb 22 is coupled to the cap body, thereby forming a halogen light bulb.

Reference numeral 25 denotes a cylindrical base body, to which a positioning flange 26 is fixed by welding or soldering, and terminal fittings 28, 28, 28 are attached to the rear end via an insulator 27. It is fixed.

The upper opening edge of the cap body 25 is expanded slightly outward to form a locking flange 29. The outer diameter of this locking protrusion 29 is slightly smaller than the inner diameter of the caulking edge 13 of the glass bulb holding plate 11. Moreover, a notch recess 30 for engagement is formed at a predetermined location of this engagement protrusion 29 .

Thus, the glass bulb holding plate 11 is fitted onto the opening edge of the cap body 25. And at this time,
The contact surface 12 of the glass bulb holding plate 11 is brought into contact with the open end of the cap body 25 . Furthermore, the engagement protrusion 14 formed on the glass bulb holding plate 11 is connected to the notch recess 30 formed on the engagement protrusion 29 of the cap body 25.
As a result, the glass bulb holding plate 11 is engaged with the cap body 25, and the filaments 7, 7 in the glass bulb 22 held by the glass bulb holding plate 11 are thereby engaged with the various elements of the cap. be positioned correctly. Thereafter, the caulked edge 13 of the glass bulb holding plate 11 is bent at several points 31, 31, . As a result, the bent caulked edge 13 of the holding plate 11 is engaged with the engaging protrusion 29 of the base body 25, and the holding plate 11 is fixed to the base body 25. Even if it is left as is, the glass bulb holding plate 11
Although it is certain that there is a fixed relationship between the and the cap body 25,
The tip of the caulked edge 13 of the holding plate 11 is attached to the base body 2.
5 may be soldered or spot welded to the side surface of 5 to increase reliability.

In this way, a halogen light bulb 32 is formed.

Effects of the Invention As is clear from the above description, in the light bulb of the present invention, one end of the glass bulb containing the filament is sealed with a substantially flat pinch seal portion, and the filament is supported by the pinch seal portion. In a light bulb that supports a lead support and also holds a glass bulb in a base with a pinch seal part, protrusions are formed on both side edges of the side part of the pinch seal part, and a protrusion between the protrusions on both sides is formed. An engaging protrusion is formed at a position spaced apart from the glass bulb on the side surface, and an interval between the opposing surfaces of the protrusions on both side edges is formed on the glass bulb holding plate at the end on the glass bulb side, so that a pinch It is characterized in that the spacing is equal to the distance between the outer edges of the clamping pieces that clamp the side surfaces of the seal part, and the distance becomes wider as the distance from the glass bulb increases.

Therefore, according to the present invention, the distance between the opposing surfaces of the protrusions on both side edges is formed on the glass bulb holding plate at the end on the glass bulb side, and the outer edge of the clamping piece that clamps the side surface of the pinch seal part is is equal to the interval between
Since it gradually becomes wider as it moves away from the glass bulb, there is no fear that the pinching piece of the holding plate will ride on the protrusion during the holding operation of the holding part of the pinch seal part, and it is different from conventional light bulbs. It is possible to solve the above-mentioned problem, that is, the occurrence of cracks or cracks in the pinch seal portion during the operation of holding the glass bulb in the cap body.

In the description of the above embodiments, the present invention was applied to a halogen light bulb, but it goes without saying that the present invention can be applied to light bulbs other than halogen light bulbs.

[Brief explanation of drawings]

Figures 1 and 2 show an example of the glass bulb in the light bulb of the present invention. Figure 1 is a side view, Figure 2 is a sectional view taken along the - line in Figure 1, and Figure 3 is a glass bulb. FIGS. 4 and 5 are perspective views of the glass bulb holding plate, which is a member that holds the glass bulbs.
The figure is a perspective view, FIG. 5 is an enlarged sectional view of the main part, and FIGS. 6 to 8 show an example of a halogen light bulb to which the light bulb according to the present invention is applied. FIG. 6 is a perspective view, and FIG. The figure is a vertical sectional view, Figure 8 is an exploded perspective view, and Figure 9B.
Figures 11 to 11 show an example of a glass bulb in a conventional light bulb, Figure 9 is a perspective view showing a glass bulb and a glass bulb holding plate, and Figure 10 shows a state in which a glass bulb is held on a glass bulb holding plate. The perspective view and FIG. 11 are enlarged sectional views of essential parts in a state where glass bulbs are held on a glass bulb holding plate. Explanation of symbols, 1...Glass bulb, 3...Pinch seal part, 5...Lead support, 7...Filament, 8...Side part, 10...Engaging protrusion, 11...
...Glass bulb holding plate, 17, 17'... Holding piece, 23... Protrusion, 24... Opposite surface of protrusion, 25
...The cap.

Claims (1)

[Claims for Utility Model Registration] One end of the glass bulb in which the filament is sealed is sealed with a substantially flat pinch seal part, and the pinch seal part supports the lead support that supports the filament, and the pinch seal part supports the lead support that supports the filament. In a light bulb in which a glass bulb is held in a base by means of a lamp, protrusions are formed on both side edges of the side surface of the pinch seal part, and protrusions are formed on the sides between the protrusions on both sides at a position spaced apart from the glass bulb. an engaging protrusion is formed, and an interval between opposing surfaces of the protrusions on both side edges is formed on the glass bulb holding plate at the end on the glass bulb side;
A light bulb characterized in that the distance is equal to the distance between the outer edges of the clamping pieces that clamp the side surfaces of the pinch seal part, and the distance gradually becomes wider as the distance from the glass bulb increases.