JPH0331000Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a novel light bulb. Specifically, the object is to provide a novel light bulb in which the filament enclosed within the glass bulb can be easily and reliably aligned with the support that supports the glass bulb.

PRIOR ART There is a light bulb as shown in FIG. 12 in which the position of the filament with respect to the support can be adjusted.

A is a glass bulb, one end of which is closed by an exhaust part b and the other end by a pinch seal part c, and a filament d is sealed inside.

The pinch seal part c is formed to be generally flat, and protrusions e, e, .

g is a glass bulb holding plate made of an elastic metal material, and has an opening in the center, and presser pieces h, h, . . . that protrude upward from the side edges of the opening.
and presser pieces i, i, . . . that protrude downward are formed.

The pinch seal portion c of the glass bulb a is held by the holding pieces h, h, . . . and i, i, . That is, the pinch seal part c is inserted between the presser pieces h, h, i, i and the presser pieces h, h, i, i, and the tips of the presser pieces h, h, ... are inserted into the pinch of the glass bulb a. The ends of the holding pieces i, i, . . . are brought into elastic contact with the engagement protrusions f, f, thereby holding the glass bulb a on the holding plate g.

Reference numeral j denotes a cap body, which is made up of a metal tube fixed to the tip of a tube body k made of synthetic resin by caulking or the like. A plurality of protrusions m, m, . . . are formed at the open end of the metal tube.

Thus, the glass bulb holding plate g is slidably fitted into the metal tube of the base j, and when the filament d is properly positioned, the protrusion of the metal tube is fitted. Piece m, m,...
and the corresponding portion of the holding plate g are fixed by spot welding.

Problem to be Solved by the Invention However, with the light bulb as described above, the pinch seal part c of the glass bulb a is pressed into a pressed shape by the holding pieces h, h, ... and i, i, ... of the holding plate g. Therefore, even if a slight dimensional deviation between the glass bulb a and the holding plate g is caused by applying local stress to the pinch seal part c, the pinch seal part c of the glass bulb a will not be cracked. It was hot.

Also, when holding the glass bulb a on the holding plate g, the pinch seal part c of the glass bulb a is pushed between the holding pieces h, h, ... and i, i, ... of the holding plate g. However, in order to securely hold the glass bulb a, the holding pieces h, h, ..., i,
The resiliency of i, . In many cases, this is also caused by cracking of the glass bulb a.

Purpose of the invention The present invention was devised in view of the above-mentioned problems with the conventional light bulbs, and it facilitates the alignment of the filament enclosed within the glass bulb with respect to the support that supports the glass bulb. It is an object of the present invention to provide a new light bulb which can be used reliably and which prevents excessive local stress from being applied to the glass bulb.

Summary of the invention In order to achieve the above-mentioned purpose, the light bulb of the present invention has been developed in such a way that the pinch seal part of the glass bulb containing the filament is wound around and held by the holding member, and the light bulb is moved approximately laterally from the front and back of the holding member. The glass bulb is supported on the support by providing an elastic attachment piece that is elastically deformable and fixing the elastic attachment piece of the holding member to the support.

Therefore, according to the present invention, since the holding member wraps around and holds the pinch seal portion of the glass bulb, local stress is less applied to the pinch seal portion, and there is less stress on the holding member during holding work and thereafter. The occurrence of cracks in the glass bulb is significantly reduced.

In addition, since the holding member is provided with an elastic mounting piece that is elastically deformed in the front-rear direction and protrudes approximately laterally from a location separated from the front and back, the elastic mounting piece is elastically deformed as appropriate to support the holding member. By fixing the filament to the body, the relative position of the filament enclosed in the glass bulb to the support can be appropriately adjusted, and the adjustment operation becomes extremely easy.

Embodiments Hereinafter, details of the light bulb of the present invention will be explained according to illustrated embodiments.

First Embodiment FIGS. 1 to 10 show a first embodiment of the light bulb of the present invention. In this embodiment, the present invention is applied 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 portion 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. Furthermore, engagement protrusions 9, 9 are formed approximately at the center of both sides of the pinch seal portion 3.
Note that an inert gas and a suitable halogen gas are sealed in the closed glass container 2. The glass bulb 1 is formed as described above.

10 is a glass bulb holding band made of a metal plate material having spring elasticity. The glass bulb holding band 10 includes a winding portion 11 wound around the pinch seal portion 3 of the glass bulb 1, and elastic mounting pieces 12, 12' for attaching the holding band 10 to a cap body to be described later.
and 13, 13' are integrally formed.

The winding portion 11 consists of two clamping pieces 14, 14', each clamping piece 14, 14' is formed in a substantially crank-like planar shape, and has long sides 15, 15' and short sides 16. , 16' and small pieces 17, 17'. That is, the long sides 15, 15' extend at right angles from one end of the short sides 16, 16', and the short sides 16, 16' extend at right angles.
The small pieces 17, 17' are integrally formed so as to extend perpendicularly from the other end of 16'.
And when the two clamping pieces 14, 14' are combined,
The long sides 15 and 15' and the short sides 16 and 16' are opposed to each other with a distance between them, thereby forming a rectangular space in plan view, and the rectangular space is The shape substantially corresponds to the cross-sectional shape of the pinch seal portion 3 of the glass bulb 1. The clamping pieces 14 and 14' are the clamping pieces 14 and 14'.
The tip of the small piece 17 and the long side 1 of the clamping piece 14'
It is integrally connected to the tip of 5'.

Approximately two-thirds of the upper portion of the long side portions 15, 15' excluding both ends are punched out on opposite sides, forming a roughly rectangular shaped punched portion 1 when viewed from the side.
8, 18' are formed. This embossing portion 18,
The width of 18' is equal to the distance W between the opposing surfaces of the protrusions 8 and 8 of the pinch seal part 3, and the height is equal to the distance W from the base end of the pinch seal part 3 to the engaging protrusion 9. They are formed to be equal to the interval H.

Embossed portions 19, 19' are also formed on the short sides 16, 16' in opposite directions.

After leaving the clamping pieces 14 and 14' slightly open as shown in FIG.
Position the pinch seal part 3 of the glass bulb 1 between the clamping pieces 14 and 14', then close the clamping pieces 14 and 14', and connect the tip of the long side 15 of the clamping piece 14 with the clamping piece 14. The attached piece 14' is brought into contact with the small piece 17', and both are fixed by spot welding. Then, the protruding portions 18, 18' of the long sides 15, 15' become the protruding portions 8, 8.
The projecting portions 19, 1 of the short sides 16, 16' fit into the recess defined by the engaging protrusion 9 and the side end of the pinch seal portion of the main body of the glass bulb 1.
9' are in contact with both end surfaces of the pinch seal portion 3;
In this way, the glass bulb 1 and the holding band 10 are combined.

The upper elastic mounting pieces 12, 12' extend outward from the upper edges of the long sides 15, 15', and
Extends diagonally downward, with both end portions 12 starting from the middle.
Only a, 12a, 12'a, 12'a extends as it is, and both end portions 12a, 12a, 12'a, 12'a
Fixing pieces 12b, 12b, 12'b, 1 from the tip of
2'b is formed to extend substantially horizontally.

The lower elastic mounting pieces 13, 13' have long sides 15,
15', the elastic mounting pieces 12, 1
2' between both end portions 12a and 12a and 12'a
and 12'a, extending outward and obliquely upward, and from the tips of the main body parts 13a, 13'a, fixing pieces 13b,
13'b is formed to extend substantially horizontally.

Reference numeral 20 denotes a cap body, which is composed of a cylinder body 21 and a metal cylinder 22 fixed to the cylinder body 21.

The cylinder body 21 is molded from synthetic resin. The cylinder main body 21 has a substantially cylindrical shape and is divided into a glass bulb holding part 24 and a connector part 25 by a partition wall 23 provided in the middle part.
The partition wall 23 has terminal mounting holes 26, 26, 2.
6 (only two are shown in the drawing) are formed. Further, a flange 27 extending outward is integrally formed on the outer peripheral surface of the cylinder body 21, and positioning notches 28, 28, 28 are formed on the outer peripheral edge of the flange 27. . 29
is an annular fitting groove formed on the outer peripheral surface of the cylinder body 21 at a position forward of the flange 27, and a sealing material such as an O ring is fitted and attached to the fitting groove 29. This contributes to waterproofing between the tube body 21 and the lamp body when the light bulb is attached to the lamp body.

The tip of the cylinder body 21 is a narrow diameter part 30 with a slightly smaller outer diameter, and the outer peripheral surface of the narrow diameter part 30 is provided with small recesses 3 at several locations, for example, four locations.
1, 31, . . . are formed.

The metal tube 22 has an inner diameter that allows it to fit over the narrow diameter portion 30 of the tube body 21 . Moreover, the metal cylinder 22
A front plate 32 is integrally formed at the front end of the
The front plate 32 has an insertion hole 33 through which the glass bulb holding band 10 can be inserted. Thus, this metal cylinder 22 is fitted onto the narrow diameter part 30 of the cylinder main body 21, and while it is in the fitted state, the recesses 31, 31, . . . formed in the narrow diameter part 30,...
The metal tube 22 is fixed to the tube body 21 by protruding the portions corresponding to the recesses 31, 31, . . . . Incidentally, in the above description, it was stated that the recesses 31, 31, . metal tube 2
2 is fitted onto the narrow diameter portion 30 and an appropriate portion of the metal tube 22 is pressed in the direction of the narrow diameter portion 30. 34, 34, . . . are formed, and at the same time, recesses 31, 3 into which the projections 34, 34, .
1, . . . , the metal tube 22 may be connected and fixed to the tube body 21 by such a method.

35, 35, 35 are terminals disposed within the connector portion 25 of the cylinder body 21. Each terminal 35
A mounting piece 36 is formed at the base end thereof and is bent at right angles to the main part, and a cylindrical part 37 is formed in the mounting piece 36 so as to protrude toward the side opposite to the main part. Therefore, the mounting pieces 36, 3 of the terminals 35, 35, 35
The cylindrical portions 37, 37, 37 formed in the terminal mounting holes 26, 26, 26 formed in the partition wall 23
is inserted from the connector portion 25 side, and the tips of the respective cylinder portions 37, 37, 37 protruding toward the glass bulb holding portion 24 side are caulked, whereby the terminal 3
5, 35, 35 are the connector parts 25 of the cylinder body 21
be placed inside.

The glass bulb holding band 10 holding the glass bulb 1 as described above is fixed to the metal tube 22 fixed to the tube body 21, which will be explained below.

As described above, the integrated glass bulb 1 and holding band 10 are inserted through the insertion hole 33 formed in the front plate 32 of the metal cylinder 22 from the tip of the pinch seal part 3. Then, among the elastic attachment pieces 12, 12' and 13, 13' of the holding band 10, the fixed pieces 12b, 12b, 12'b, 12'b, 13,
13'b comes into contact with the edge of the insertion hole 33. and,
In this state, the positions of the filaments 7, 7 are set in advance so that they are in front of the normal positions.

Therefore, when force is applied to push the glass bulb 1 toward the cap body 20, the glass bulb holding band 1
0 elastic mounting pieces 12, 12' and 13, 13',
As shown by the two-dot chain line in Figure 10, it deforms elastically,
Thereby, the glass bulb 1 can be pushed towards the base body 20. In addition, if the positions of the filaments 7, 7 are shifted in a direction perpendicular to the axial direction of the cap body 20, the size of the insertion hole 33 of the metal tube 22 may be Since the elastic mounting pieces 12, 12' and 13, 13' are formed slightly larger than the surface shape, each of the fixing pieces 12
b, 12b, 12'b, 12'b, 13b, 13'
Adjust its position by sliding it along the front surface of the front plate 32 of the metal cylinder 22.

After adjusting the positions of the filaments 7, 7 as described above, each elastic mounting piece 12, 12' and 13,
13' fixed pieces 12b, 12, 12'b, 12'b,
13b and 13'b are spot welded to metal tube 2.
It is fixed to the front plate 32 of No. 2. Then, both sides of the holding band 10 are connected to the long side 15 and the elastic mounting piece 12,
13, the long side 15', and the elastic mounting pieces 12' and 13' form a triangular shape. It will be fixed.

Note that the lead wires 5, 5, 5 protruding from the tip of the pinch seal portion 3 are connected to the corresponding terminals 3, respectively.
5, 35, 35 are soldered.

In the light bulb described above, the glass bulb 1 has a holding band 10 wrapped around its pinch seal portion 3.
Since it is fixed to the metal tube 22 of the cap body 20 via the metal tube 22 of the cap body 20, no unreasonable stress is applied to the glass bulb 1 either when it is attached to the glass bulb 1 or afterwards, and cracks due to local concentration of stress on the glass bulb 1 are avoided. can be significantly reduced.

Further, the position of the filaments 7, 7 can be adjusted using the elastic mounting pieces 12, 12', 13, 1 of the holding band 10.
By elastically deforming the metal tube 22 in the front-rear direction,
This can be easily done by sliding it over the front plate 32 of the.

Second Embodiment FIG. 11 shows the metal tube 2 of the glass bulb holding band 10.
2 shows another example of how to fix it to 2.

That is, the elastic mounting piece 1 on the front side of the holding band 10
2, 12' fixed pieces 12b, 12b, 12'b, 1
2'b is in contact with the front side of the opening edge of the insertion hole 33 formed in the front plate 32 of the metal tube 22, and the fixing pieces 13b, 13'b of the rear elastic mounting pieces 13, 13'
is brought into contact with the rear side of the opening edge of the insertion hole 33.

And elastic mounting pieces 12, 12', 13, 1
The front plate 32 can be elastically deformed in the front-rear direction.
After adjusting the position of the filaments 7, 7 by sliding them against each other, each fixing piece 12b, 12
b, 12'b, 12b', 13b, 13'b are fixed to the front plate 32 by spot welding.

This second embodiment also provides the same effects as the first embodiment.

Effects of the Invention As is clear from the above description, the light bulb of the present invention can be used in a direction substantially laterally from a point separated from the front and back of the holding member that holds the pinch seal part of the glass bulb containing the filament by winding it. The glass bulb is supported on the support by providing an elastic attachment piece that is elastically deformed in the direction and fixing the elastic attachment piece of the holding member to the support.

Therefore, according to the present invention, since the holding member wraps around and holds the pinch seal portion of the glass bulb, local stress is less applied to the pinch seal portion, and there is no need to apply stress to the holding member during or after the holding operation. The occurrence of cracks in the glass bulb is significantly reduced.

In addition, since the holding member is provided with an elastic mounting piece that is elastically deformed in the front-rear direction and protrudes approximately laterally from a location separated from the front and back, the elastic mounting piece is elastically deformed as appropriate to support the holding member. By fixing the filament to the body, the relative position of the filament enclosed in the glass bulb to the support can be appropriately adjusted, and the adjustment operation becomes extremely easy.

[Brief explanation of the drawing]

Figures 1 to 10 show the first embodiment of the light bulb of the present invention, where Figure 1 is a front view, Figure 2 is a side view, and Figure 3 is a sectional view taken along the - line in Figure 1. , FIG. 4 is a perspective view of the glass bulb, FIGS. 5 to 9 show the glass bulb holding band, FIG. 5 is a front view before closing, FIG. 6 is a front view in the closed state, and FIG. 7 is a side view, FIG. 8 is an enlarged sectional view taken along the - line in FIG. 5, FIG. 9 is an enlarged sectional view taken along the - line in FIG. 12 is an enlarged cross-sectional view of the main parts showing the second embodiment of the light bulb of the present invention, and FIG. 12 shows an example of a conventional light bulb.
A is an exploded perspective view, and B is an enlarged sectional view of main parts. Explanation of symbols, 1... Glass bulb, 3... Pinch seal part, 7... Filament, 10... Holding member, 12, 12', 13, 13'... Elastic mounting piece,
20...Support.

Claims (1)

[Claims for Utility Model Registration] Elastic mounting pieces that are elastically deformed in the front and back direction approximately laterally are provided on a holding member that winds and holds the pinch seal portion of a glass bulb encapsulating a filament, which is separated from the front and back of the holding member. A light bulb, characterized in that the glass bulb is supported on the support by fixing the elastic attachment piece of the holding member to the support.