JP2572972B2 - Mercury lamp for photopolymerization - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mercury lamp for photopolymerization having an arc tube in which a base encapsulating a part of a lead wire connected to an electrode is attached to both ends. is there.

[Conventional technology]

FIG. 3 shows a conventional example of a lamp. In the figure, reference numeral 1 denotes a mercury lamp for photopolymerization (hereinafter, referred to as a lamp). 2 is an arc tube, mercury and argon gas (startup auxiliary gas)
Is enclosed, and the middle part is a hollow columnar shape, and both ends are plate-shaped. Reference numeral 3 denotes an electrode, which is disposed opposite to both ends in the tube. Numeral 4 denotes a cylindrical porcelain ferrule which is fitted to both ends of the arc tube and has a step 4d formed on the outer peripheral surface thereof. 5 is a coated lead (hereinafter simply referred to as a lead wire),
One part of the lead wire 5 is sealed in the base 4, and one end of the lead wire 5 is connected to the electrode 3, and the other end is connected to the terminal 6.

FIG. 4 shows a main part of a discharge lamp to which the lamp 1 shown in FIG. 3 is attached. In the figure, reference numeral 7 denotes a metal reflecting plate which reflects light from the lamp 1 in a certain direction to make the light distribution uniform. Reference numeral 8 denotes a U-shaped metal socket, which is attached to the reflection plate 7 and elastically holds the base 4 so that an inner portion of the step portion 4d and an outer portion of the socket 8 are locked. 9
Is a charging terminal, which is connected to a ballast (not shown), and the terminal 6 is fixed with screws.

[Problems to be solved by the invention]

Since this kind of lamp 1 is designed for photopolymerization, ultraviolet light and heat radiated from the lamp are larger than those of other lamps. Therefore, when the lead wire 5 protrudes from the end of the base 4 as in the related art, conduction heat from the lamp is also applied, the coating of the lead wire 5 becomes brittle, and the end of the base 4 and the side plate of the lamp (FIG. (Not shown), the lead wire 5 is always in contact with the side plate, and its coating is easily worn and damaged by the vibration of the side plate and the like, and the exposed lead wire 5 is in contact with the side plate. Therefore, there is a problem that a short circuit occurs.

The present invention has been made to solve the above problems, and when attached to a lamp, can prevent contact between a lead wire and a lamp side plate, and furthermore, can prevent the influence of ultraviolet rays and heat from the lamp, and prevent leakage of electric current. It is an object of the present invention to obtain a lamp whose generation is prevented.

[Means for solving the problem]

A lamp according to the present invention has an arc tube and a base in which a part of a covered lead wire connected to electrodes attached to both ends of the arc tube is sealed, and a peripheral surface of the base is a socket. A lamp held in a clamped state at
The base has a recessed accommodation cutout at an end thereof for burying and covering the covered lead wire.

[Action]

Since the base according to the present invention has an accommodation cutout for accommodating the lead wire at the end thereof, the lead wire does not protrude from the end of the base, suppressing the influence of ultraviolet rays and heat from the lamp, and When it is mounted on a side plate, it does not come into contact with the side plate or the like.

〔Example〕

FIG. 1 shows an embodiment of the present invention. In the figure,
2, 3, 5, and 6 indicate the same or corresponding parts as in FIG.
Numeral 11 denotes a cylindrical porcelain ferrule which is fitted to both ends of the arc tube 2, has a stepped portion 11 d on the outer peripheral surface, and a concave accommodation notch 11 s for accommodating the lead wire 5 at the end. Is formed.

In the lamp of this embodiment, the lead wire 5 is buried and accommodated in the accommodation notch 11s formed at the end of the base 11, as shown in FIG. Even when approaching, the lead wire 5 does not contact the side plate. Furthermore, the vicinity of the protruding portion of the lead wire 5 from the base 11 can be prevented from being exposed to ultraviolet rays or heat from the lamp by the housing cutout 11s, so that the coating can be prevented from becoming brittle.

Note that the arc tube is not limited to a straight tube.

〔The invention's effect〕

In the present invention, the housing has a cutout for housing the lead wire, so that the contact between the lead wire and the lamp side plate can be prevented, and the bridging of the lead wire coating can be prevented. There is an effect that it is possible to prevent electric leakage.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of the present invention, FIG. 2 is a perspective view showing a part of an essential part of a lamp equipped with the lamp shown in FIG. 1, and FIG. 3 is a conventional example of a lamp. Plan view,
FIG. 4 is a partially cutaway perspective view showing an example of a lamp equipped with the lamp shown in FIG. In the figure, 2 is an arc tube, 5 is a lead wire, 11 is a base, 11
s is an accommodation notch. In the drawings, the same reference numerals indicate the same or corresponding parts.

Continuation of the front page (56) References JP-A 60-112070 (JP, U) JP-A 61-48675 (JP, U) JP-A 61-145456 (JP, U)

Claims (1)

(57) [Claims] An arc tube and a base in which a part of a covered lead wire connected to electrodes attached to both ends of the arc tube are sealed, and a peripheral surface of the base is connected to a socket. A lamp held in a sandwiched state, wherein the base is provided with a concave accommodation notch at an end thereof for burying and covering the covered lead wire.