JPH055637Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the prefocus base structure of a halogen lamp.

In the case of the conventional pre-focus base structure of the halogen lamp B', as shown in FIG. 8', and then three-dimensionally adjust the height of the filament 9' from the position adjustment ring 1', the inclination of the filament 9' with respect to the position adjustment ring 1', and the positional relationship of the light shielding plate 13'. The adjustment ring 1' and the holder 10' were soldered or spot welded. In this case, since the position adjustment ring 1' and the holder 10' are separate, it is necessary to assemble three parts: the adapter 8', the holder 10', and the position adjustment ring 1'. The disadvantage was that various costs were high.

Furthermore, there are three positioning protrusions 7' radially around the circumference of the position adjustment ring 1', but when the position adjustment ring 1' and the holder 10' are separate bodies, the positioning protrusions 7' and the holder There was a drawback that the positional relationship with the stopper blade 6' implanted at 10' was difficult to maintain constant.

In addition, since the position adjustment ring 1' and the holder 10' were separate bodies, a gap was created between the position adjustment ring 1' and the holder 10', and a waterproof effect could not be expected.
When the halogen lamp B' was inserted into the headlight, there was a drawback in that moisture entered through this gap and condensation occurred inside the headlight.

In addition, in this case, since the position adjustment ring 1' and the holder 10' are separate bodies, when the above-mentioned three-dimensional adjustment is performed, the position adjustment ring 1' must be tilted with respect to the holder 10', which significantly changes the external shape. It also had the disadvantage of being damaged.

The present invention was made in view of the conventional example,
The goal is to create a halogen lamp that can reduce costs, maintain a constant positional relationship between the positioning protrusion and the plug blade, is highly waterproof, and has an ideal external shape. The purpose is to provide a pre-focus based structure.

The present invention will be described in detail below with reference to illustrated embodiments.
Fig. 1 is a longitudinal cross-sectional view of an example of the present invention, and Fig. 2 is a plan view thereof, in which a concave cylindrical portion 2 with a bottom is integrally recessed near the center of a disc-shaped position adjustment ring 1. There is.
An insulating plate 11 is attached to the bottom surface of the concave cylindrical portion 2, and a plug blade 6 is implanted in this insulating plate 11. Therefore, the positional relationship between the positioning protrusions 7 radially protruding from the peripheral edge of the position adjustment ring 1 and the stopper blade 6 is determined mechanically, and no misalignment occurs as in the conventional case.

The slide cap 4 has a cylindrical shape with a downward opening, and the light bulb 3 is inserted into the mounting hole 4b of the ceiling 4a.
It is fixed. Joint arms 5 are cut and raised from the side surface of the slide cap 4, and a plurality of joint arms 5 protrude from the side surface of the slide cap 4 at regular intervals. The joint arm 5 is connected to the third joint arm 5.
As shown in the figure, it is approximately T-shaped.
In this way, a hole 12 is cut and raised on the slide cap 4 side.
Since this is formed, there is no cut-and-raised hole 12 on the side of the position adjustment ring 1, and the waterproof effect is complete, and when it is attached to a headlight, it is possible to prevent dew condensation inside the headlight.

Then, the slide cap 4 is slidably inserted into the concave cylindrical part 2, and as shown in FIG. In this state, adjust the tilting of the filament with respect to the position adjustment ring 1, the height of the filament from the position adjustment ring 1, and the positional relationship of the light shielding plate 13, and when the positional relationship between the two is determined three-dimensionally, remove the slide cap. 4 and the position adjustment ring 1 are soldered or spot welded.

As described above, in the present invention, a bottomed cylindrical concave portion is integrally recessed in the position adjustment ring, and a connecting arm cut up into the slide cap is attached to the slide cap to which the bulb body is attached. Since it is slidably inserted while in contact with the inner wall of the recessed cylinder, and the slide cap and position adjustment ring are connected, the conventional adapter can be omitted, reducing the number of parts from three to two. This has the advantage of reducing materials, processing, and assembly costs.In addition, the position adjustment ring is integrally recessed with a bottomed cylindrical concave portion, which can be cut out from the slide cap and expanded outward. Since the protruding joint arm is brought into contact with the inner wall of the concave tube, there is no gap between the position adjustment ring and the concave tube, resulting in an excellent waterproof effect, and when attached to a headlight, no condensation will occur inside. It has the advantage that it does not occur. In addition, since the plug blade is embedded in the bottom surface of the concave cylinder part and the mounting protrusion is protruded from the peripheral edge of the position adjustment ring, the positional relationship between the plug blade and the positioning projection is determined mechanically. This has the advantage that the halogen lamp can always be easily and accurately fitted into the socket. Furthermore, since the position adjustment ring and the concave cylinder part are integrally formed, the position adjustment ring and the concave cylinder part are mechanically formed at exactly right angles, and the external shape is significantly improved compared to the conventional one. This has the advantage of increasing product value.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an example of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is an enlarged view of an example of the joint arm, and FIG. 4 is an enlarged sectional view of the main part of FIG. FIG. 5 is a longitudinal sectional view of a conventional example. DESCRIPTION OF SYMBOLS 1...Position adjustment ring, 2...Concave tube part, 3...Light bulb body, 4...Slide cap, 5...Joining arm, 6...Blug blade, 7...Positioning protrusion.

Claims (1)

[Scope of utility model registration request] A concave tube-like portion with a bottom is integrally recessed in the position adjustment ring, and a connecting arm that bulges outward by cutting the slide cap to which the bulb body is attached is cut into the slide cap and forms the concave tube portion. Insert the cap so that it can slide freely while it is in contact with the inner wall, join the slide cap and the position adjustment ring, insert a stopper blade into the bottom of the recessed cylinder, and protrude a positioning protrusion on the periphery of the position adjustment ring. The pre-focus base structure of a halogen lamp is characterized by: