Halogen lamp with reflector

Details Halogen lamp with reflector Halogen lamp with reflector

1999-11-18

2001-08-28

Cariaso, Alan (Department: 2875)

Illumination

Light source and modifier

Including reflector

C362S267000, C362S444000, C313S318080, C313S318110, C313S579000, C313S113000

Reexamination Certificate

active

06280061

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a halogen lamp with reflector.
2. Description of the Prior Art
FIG. 5
is a cross sectional view of a conventional halogen lamp with reflector.
Referring to
FIG. 5
, the conventional halogen lamp with reflector includes a halogen lamp body (
11
) and a reflector (
12
) in which the halogen lamp body (
11
) is disposed at a center thereof.
The halogen lamp body (
11
) includes a pinch seal portion (
11
a
).
Lead rods (
11
b
) connected to a filament (
16
) in the halogen lamp body (
11
) are drawn out from the pinch seal portion (
11
a
) to the outside.
A rearwardly protruding lamp mount portion (
13
) of the reflector (
12
) is disposed at the center of the reflector (
12
), and the pinch seal portion (
11
a
) of the halogen lamp body (
11
) is inserted into the lamp mount portion (
13
) and fixed by an inorganic adhesive (
14
).
In the conventional halogen lamp with reflector, a method of mounting the halogen lamp body (
11
) onto the reflector (
12
) is as follows.
First, the pinch seal portion (
11
a
) of the halogen lamp body (
11
) is inserted into the lamp mount portion (
13
) disposed at the center of the reflector (
12
).
Then, the halogen lamp body (
11
) is focalized by a three-dimensional and oscillating movement. When the halogen lamp body (
11
) is focalized, an inorganic adhesive (
14
) is injected into a gap between the pinch seal portion (
11
a
) and the inside surface of the lamp mount portion (
13
) through an injection aperture (
15
a
) disposed in a release paper (
15
) stuck so as to close a bottom aperture (
13
a
) of the lamp mount portion (
13
).
The halogen lamp body (
11
) is held until the inorganic adhesive (
14
) is dried and hardened to some extent and is capable of holding the halogen lamp body (
11
).
Lastly, the release paper (
15
) is peeled off, and the inorganic adhesive (
14
) is calcined. Thus, the halogen lamp body (
11
) is fixed onto the reflector (
12
) in the conventional method.
In this case, as will be understood from
FIG. 5
, the inorganic adhesive (
14
) immediately after its injection is soft and also the pinch seal portion (
11
a
) buried in the inorganic adhesive (
14
) is not supported anywhere. Therefore, the halogen lamp body (
11
) must be kept being held until the inorganic adhesive (
14
) is dried and hardened to some extent, rendering it inefficient to produce the lamp with reflector.
Moreover, if the front opening (
13
b
) of the lamp mount portion (
13
) on the concave reflecting section (
12
a
) side of the reflector (
12
) is fully filled with the inorganic adhesive (
14
) in injecting the inorganic adhesive (
14
) into the gap between the pinch seal portion (
11
a
) and the inside surface of the lamp mount portion (
13
), the inorganic adhesive (
14
) overflows into the concave reflecting section (
12
a
), thereby deteriorating the appearance and also increasing the random reflection.
This raises a problem that, when the lamp is incorporated in a device for use as a product, the focalization is difficult in the device in which the lamp is incorporated.
Further, unless the bottom aperture (
13
a
) for injecting the inorganic adhesive (
14
) is closed by a release paper (
15
), the inorganic adhesive (
14
) overflows also through the bottom aperture (
13
a
), thereby deteriorating the appearance.
Furthermore, if a release paper (
15
) is used, it adds to the costs itself and also human labor is needed in sticking, releasing, and discarding the release paper (
15
), thereby further increasing the costs.
Another important feature, although not illustrated, is a fact that, in conventional lamps, only a part of the gap is filled with the inorganic adhesive (
14
) for fear that the inorganic adhesive (
14
) overflows through the front opening (
13
b
) on the concave reflecting section (
12
a
) side of the reflector (
12
), as mentioned above.
As a result of this, the heat in activating the lamp is not sufficiently conducted from the pinch seal portion (
11
a
) to the lamp mount portion (
13
) of the reflector (
12
), raising a problem that the halogen lamp body (
11
) tends to be heated too much and, in the case of a high wattage halogen lamp, the lamp cannot withstand the heat unless the lamp is forcibly cooled by means of a fan.
SUMMARY OF THE INVENTION
A first object to be achieved by the present invention is to allow the pinch seal portion to be provisionally fitted onto the lamp mount portion simply by inserting the halogen lamp body with a pinch seal support and a lead rod support into the lamp mount portion of the reflector and to eliminate the need for holding the lamp body after injection of the inorganic adhesive.
A second object to be achieved by the present invention is to prevent deterioration of the appearance and difficult focalization caused by the injected inorganic adhesive.
A third object to be achieved by the present invention is to make available the use of a high wattage halogen lamp by improving the heat conduction from the pinch seal portion to the lamp mount portion of the reflector.
As an embodiment to achieve the aforementioned objects of the invention,
in a halogen lamp with reflector according to the present invention,
a lead support mounted to a bottom aperture of a lamp mount portion of a reflector closes the bottom aperture; lead rods of the halogen lamp body are held by the lead support by being inserted into the lead support;
an opposite opening on the concave reflecting section side of the reflector is closed by a pinch seal support mounted onto the pinch seal portion of the halogen lamp body; and the pinch seal portion is fixed at a predetermined position in the lamp mount portion by the pinch seal support.
Owing to this construction, the pinch seal support holds the pinch seal portion at a predetermined position in the lamp mount portion, and the lead rod support holds the lead rods at predetermined positions in the bottom aperture of the lamp mount portion, whereby the halogen lamp body is provisionally fixed at a predetermined position in the reflector.
This eliminates the need for holding the halogen lamp body until the inorganic adhesive is hardened to some extent after the inorganic adhesive is injected into a gap between the inner side of the lamp mount portion and the pinch seal portion. Therefore, work can be successively carried out and the productivity of the halogen lamp with reflector according to the present invention is improved.
Further, since the pinch seal support can stop the adhesive from overflowing through the front opening of the lamp mount portion to the outside, the surface of the concave reflecting section is not contaminated even if a sufficient amount of adhesive is injected.
Thus, since a sufficient amount of adhesive can be injected into a gap between the pinch seal portion and the inside of the lamp mount portion, heat conduction between the pinch seal portion and the lamp mount portion of the reflector is improved, whereby a high wattage lamp can be produced due to good heat release even without forcible cooling.
A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein:


REFERENCES:
patent: 4528619 (1985-07-01), Dolan
patent: 5053935 (1991-10-01), Hellwig
patent: 5206799 (1993-04-01), Tiesler

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