JPH0336030Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in the internal structure of a light bulb with an outer bulb used in a halogen light bulb. Light bulb with bulb A
, the pinch seal portion 11 of the halogen light bulb 7
A flat-shaped fixed cylinder part 8 is protruded from the base, and the cutout piece 20 cut out from the base B is pushed down to the bottom side of the base B, and the fixed cylinder part 8 is attached with adhesive applied to the cutout piece 20 and the bottom of the base B. Outer bulb 5 fixed to the bottom of base B and fitted into halogen bulb 7
This relates to the internal structure of a light bulb with an outer bulb, which is characterized in that it is attached to a cap B.

For the conventional light bulb A′ with an outer bulb,
As shown in FIG. 7, the halogen light bulb 7' and the mount 22' are separate bodies, and are held by two long and short support rods 21' that stand up from the mount 22'. Further, these support rods 21' are connected to external lead rods 12' led out from the pinch seal portion 11' of the halogen light bulb 7', and also have the role of supplying electricity. In this case, there are many components and the internal structure is very complex, so the processing process is of course difficult.
There is a drawback that the assembly process is time-consuming and cannot reduce costs, and since the halogen bulb 7' and the mount 22' are separate, when the internal structural parts are assembled, the halogen bulb 7'
Another drawback was that the centers of the mount 22' and the mount 22' did not align stably, and adjustment work was required in the final assembly process. Therefore,
In Japanese Patent Application Laid-Open No. 57-168462, a flared part (corresponding to a fixing tube part) is provided protruding from the stem of a light bulb (corresponding to a pinch seal part), and it is fixed with an adhesive applied to the bottom of the cap. A method was proposed, but when fixing with adhesive, the stem had to be held until the adhesive solidified, which not only took time to assemble, but also resulted in variations in assembly accuracy.

The present invention was devised in view of the drawbacks of the conventional examples, and its purpose is to have a very simple internal structure that does not take much time to process and assemble, and which can be temporarily fixed using cut-out pieces. Therefore, it is an object of the present invention to provide an internal structure of a light bulb with an outer bulb that can be assembled with extremely high precision.

The present invention will be explained in detail below. FIG. 1 is an exploded perspective view of a first embodiment of the present invention. Outer valve 5
has a cylindrical shape with a spherical head, an open bottom surface, and a groove-shaped engagement recess 6 formed around the entire circumference near the bottom opening. As shown in the figure, the halogen light bulb 7 used in this embodiment is pinch-sealed at the upper end and center, and is open in the lower half, with a molybdenum metal foil embedded in the pinch-sealed part 11. 10 filaments in 9
has been erected. An external lead rod 12 is led out from the pinch seal portion 11, and an inverted L-shaped energizing rod 13 arranged on the side of the halogen light bulb 7 is connected to the external lead rod 12 at the upper end. There is. The cap B has a double structure of an internal cap 1 and an external cap 2. The internal cap 1 has a cylindrical shape with a bottom, and has an engagement convex portion 4 that bulges inward in an annular shape near the opening edge, and has a threaded portion 14 screwed below the engaging convex portion 4. Furthermore, a plurality of notch grooves 15 are formed from the opening edge toward the bottom, beyond the engaging convex portion 4, and a plurality of cutout pieces 20 are provided on the side surface of the internal cap 1, and the cutout pieces 20 are provided inside the cap. By tilting the base 1 toward the bottom side, the cutout piece 20 is brought into elastic contact with the fixed cylinder part 8 of the halogen light bulb 7,
Temporarily fasten until fixing with adhesive is completed.
Here, the portion sandwiched between the notch grooves 15 is referred to as the engaging tongue piece 3. The external cap 2 has a cylindrical shape with a bottom, a threaded portion 16 is carved on the side surface, and a contact 17 is provided on the cylindrical portion.
A contact 17 is provided on the cylindrical portion of the internal cap 1.
A through hole 18 is bored corresponding to the hole 18. here,
The outer diameter of the outer valve 5 and the inner diameter of the internal cap 1 are the same, and the outer diameter of the internal cap 1 and the inner diameter of the external cap 2 are the same. In this way, the attachment position of the halogen light bulb 7 to the internal base 1 is uniquely determined, and the reproducibility becomes extremely excellent.

First, adhesive is applied to the bottom of the internal cap 1, and then the fixing cylinder part 8 of the halogen bulb 7 is inserted, and the cutout piece 20 is tilted toward the bottom of the internal cap 1 to cut it out. 20 pieces of halogen bulb 7
It comes into elastic contact with the fixed cylinder part 8 and is temporarily fixed until fixing with adhesive is completed. Then, the current-carrying rod 13 is soldered or welded to the lower part or bottom of the inner surface of the internal cap 1. After erecting the halogen bulb 7 in the internal cap 1 in this way, push out the engagement tongues 3 of the internal cap 1, insert the outer bulb 5 into the internal cap 1, and insert the outer bulb 5 into the engagement recess 6. The engaging convex portion 4 is inserted. Next, adhesive is applied to the outer periphery of the inner diameter cap 1 or the inner surface of the external cap 2, and while the external lead rod 12, which can be led out from the lower end of the halogen bulb 7, is inserted into the through hole of the contact 17, the internal cap 1 is connected to the outside. The external lead rod 12 inserted into the contact 17 is soldered or welded, and the remaining portion is cut off. The halogen light bulb 7 with an outer bulb thus formed as shown in FIG. 3 is used by screwing the base B into a socket.

Furthermore, in this embodiment, the threaded portion 14 is screwed onto the internal cap 1, but the present invention is not limited to this, and a simple cylindrical shape may be used, and the threaded portion 14 may be fixed by adhesive.

As mentioned above, the present invention involves protruding from the pinch seal part of a halogen light bulb with a flat-shaped fixing cylinder part, and by folding the cutout piece cut out from the cap to the cylindrical part side of the cap and applying it to the cutout piece and the bottom of the cap. Since the fixed cylinder part is fixed to the bottom of the base with adhesive, the position of the halogen bulb and the base will not move unless the fixed cylinder part is damaged, and even during assembly. Simply fit the fixed tube part of the halogen bulb into the base, and by tilting the cutout piece toward the bottom of the inner base, the cutout piece will come into elastic contact with the fixed tube part of the halogen light bulb, and this will temporarily hold the halogen bulb until it is fixed with adhesive. This has the advantage that it is possible to position the base and the halogen bulb, and the assembly work can be done easily and accurately.The outer bulb that fits over the halogen bulb is attached to the base. , it is possible to accurately determine the relative positional relationship between the halogen bulb and the outer bulb through the base, which also has the advantage of eliminating variations in quality.

[Brief explanation of drawings]

FIG. 1: An exploded perspective view of the first embodiment of the present invention.
FIG. 2: A perspective view showing a temporarily fixed state of the internal cap of the present invention; FIG. 3: A perspective view of a conventional example. A...Light bulb with outer bulb, B...Base, 1
... Internal cap, 2... External cap, 3... Engaging tongue piece, 4... Engaging convex portion, 5... Outer valve,
6... Engagement recess, 7... Halogen light bulb, 8... Fixed tube portion, 11... Pinch seal portion.

Claims (1)

[Scope of claim for utility model registration] (1) In a light bulb with a double structure outer bulb in which a halogen light bulb is built into the outer bulb,
A flat-shaped fixing cylinder protrudes from the pinch seal part of the halogen bulb, a cutout piece cut out from the cap is pushed down to the bottom of the cap, and the fixing cylinder part is attached to the cap using adhesive applied to the cutout and the bottom of the cap. An internal structure of a light bulb with an outer bulb, characterized in that the outer bulb is fixed to the bottom of the bulb and fitted onto a halogen bulb, and is attached to the base. (2) The internal structure of the light bulb with an outer bulb according to claim 1, wherein the outer diameter of the lower end of the fixed cylinder portion is approximately equal to the inner diameter of the cap.