JP2588326Y2 - High pressure steam discharge lamp - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure vapor discharge lamp having an arc tube provided with an external auxiliary conductor.

[0002]

2. Description of the Related Art Generally, a high-pressure vapor discharge lamp such as a high-pressure sodium lamp requires a high starting voltage. Therefore, an arc tube is provided with an external wire made of a high melting point metal wire or a coil wire for lowering the starting voltage of the lamp. In many cases, an auxiliary conductor is provided.

FIG. 2A is a plan view showing a main part of a configuration example of a conventional high-pressure sodium lamp using an external auxiliary conductor, and FIG. 2B is a side view thereof. In both figures, reference numeral 1 denotes an arc tube, one end of which is substantially vertically elongated as a whole.
Oite proximally of the tower 2 which is configured by bending a rectangular shape
Is supported on the supporting substrate 3 such as a ceramic, which is held laterally, the other end of the counter at the bent front end portion of the strut 2
It is supported by welding or the like on a niobium lead wire 4 for supporting an arc tube and a power supply, which are stretched in the lateral direction between the opposing columns . Reference numeral 5 denotes an external auxiliary conductor, and its movable end 5a
Is attached to the free end 6a of the bimetal 6 supported by the column 2 near the arc tube support substrate 3, and its fixed end 5b
Is fixed to the tip of the column 2. When the lamp is started, if the external auxiliary conductor 5 is not in close contact with the arc tube 1,
Since the effect of lowering the starting voltage of the lamp is reduced, the external auxiliary conductor 5 is in close contact with the tube wall of the arc tube 1 at normal temperature, and is separated from the tube wall of the arc tube 1 by the operation of the bimetal 6 after the lamp is turned on. To reduce sodium loss and the like. In FIG. 2, reference numeral 7 denotes another lead wire for supplying power.

[0004]

By the way, in the above-mentioned conventional high-pressure sodium lamp, one end (the lower part in the figure) of the luminous tube 1 is supported by a luminous tube supporting substrate 3 held by a column 2. Therefore, the arc tube 1 is not displaced by vibration during transportation or lighting.
However, the other end (the upper part in the figure) of the arc tube 1 is
A niobium lead wire 4 stretched over the tip of the support 3
In the case where the lead tube 4 is subjected to vibration or the like during transportation or lighting, as shown in FIG. In some cases, the external auxiliary conductor 5 may be separated from the tube wall of the arc tube 1 and may not be able to function as the external auxiliary conductor.

The present invention has been made to solve the above-mentioned problem in the conventional high-pressure sodium lamp. Even when the arc tube is moved by vibration or the like, the external auxiliary conductor is not separated from the arc tube wall. It is an object of the present invention to provide a high-pressure steam discharge lamp which has been developed.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has a generally vertically long rectangular shape as a whole.
A strut configured to bend, and a bent tip end side of the strut.
For support that is stretched laterally between opposing columns
The lead wire is held laterally at the base side of the strut.
Support substrate, one end of which is at the center of the support lead wire.
An arc tube fixed and the other end supported at the center of the support substrate, one end fixed to the tip of the support, and the other end supported by a support near the support substrate It is connected to a free end of a bimetal, and is connected to the supporting lead wire from the tip of the support so as to be in close contact with the tube wall of the arc tube at startup.
A high-pressure vapor discharge lamp comprising an external auxiliary conductor extending in the direction of the central axis of the arc tube so as to intersect with the support lead.
One end of the arc tube fixed to the wire is separated from the external auxiliary conductor.
When it moves in the direction of
So that the external auxiliary conductor is pressed toward the tube wall of the arc tube.
The external auxiliary conductor, the supporting lead wire,
The arc tube crosses through the side away from the external auxiliary conductor
It is to be arranged.

[0007] By arranging the external auxiliary conductor so as to intersect with the supporting lead wire, the luminous tube causes the supporting lead wire to press the external auxiliary conductor due to vibration during transportation or lighting. When moving in the direction, the external auxiliary conductor moves following the movement of the arc tube via the supporting lead wire, and therefore does not separate from the arc tube wall.
When the arc tube moves in such a direction that the supporting lead wire is separated from the external auxiliary conductor, the external auxiliary conductor comes into closer contact with the arc tube wall. Therefore, even if the arc tube moves in any direction due to vibration or the like, the external auxiliary conductor does not separate from the arc tube wall, and the function as the external auxiliary conductor can be effectively held.

[0008]

Next, an embodiment will be described. (A) of FIG.
FIG. 1 is a plan view showing a main part of an embodiment of the high-pressure vapor discharge lamp according to the present invention, and FIG. 1B is a side view thereof, and FIG.
The same or corresponding members as those of the conventional example shown in FIGS. 1A and 1B are denoted by the same reference numerals, and the description of the same components will be omitted. In the present invention, the external auxiliary conductor 5 is formed of a tungsten coil wire, the movable end 5a of which is connected to the free end 6a of the bimetal 6, and the fixed end 5b side of the arc tube 1 as in the conventional example. One end intersects with the niobium lead wire 4 that is supported, and is fixed to the support lead wire 4.
One end of the arc tube 1 separated from the external auxiliary conductor 5
In the direction of movement,
The auxiliary auxiliary conductor 5 is pressed toward the tube wall of the arc tube 1.
The external auxiliary conductor 5 is connected to the supporting lead wire 4,
The direction in which the arc tube 1 is separated from the external auxiliary conductor 5 is
In FIG. 1A, the lead 2 is connected to the tip of the support 2 through the lower side.

In the high-pressure sodium lamp having the above-mentioned structure, vibrations during transportation or during operation cause vibrations in FIG.
3B, when the arc tube 1 moves in the direction indicated by A, the external auxiliary conductor 5 is pressed by the lead wire 4 and moves following the movement of the arc tube 1. I won't go further. The arc tube 1 is shown in FIG.
In the case of moving in the direction indicated by B, the external auxiliary conductor 5 comes into closer contact with the arc tube 1, so that no problem occurs.

In the above embodiment, the present invention is applied to a high-pressure sodium lamp, but the present invention can be applied to other high-pressure vapor discharge lamps such as a high-pressure mercury lamp and a metal halide lamp.

[0011]

[Effect of the Invention] As described above based on the embodiment,
According to the present invention, even if the arc tube moves from the support post due to vibration during transportation or lighting, the external auxiliary conductor does not separate from the arc tube wall, thereby preventing the function of the external auxiliary conductor from lowering. Can be.

[Brief description of the drawings]

FIG. 1 is a plan view and a side view showing a main part of an embodiment of a high-pressure vapor discharge lamp according to the present invention.

FIG. 2 is a plan view and a side view showing a main part of a configuration example of a conventional high-pressure sodium lamp, and a side view showing a state in which an arc tube is moved by receiving an external force.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 arc tube 2 support 3 arc tube support substrate 4 arc tube support lead wire 5 external auxiliary conductor 6 bimetal 7 power supply lead wire

Claims (1)

(57) [Scope of request for utility model registration] 1. An apparatus according to claim 1 , which is bent into a substantially vertically elongated rectangular shape as a whole.
Opposed to the constructed strut at the bending tip side of the strut
Support leads stretched laterally between the supporting posts
And a support held laterally on the base side of the column
One end of the substrate is fixed to the center of the supporting lead wire.
Is a light emitting tube whose other end is supported in a central portion of the supporting substrate, one end fixed to the distal end of the strut, the free end of the bimetal whose other end is supported on the posts in the vicinity of the support substrate
And connected to the supporting lead wire from the tip of the support so as to be in close contact with the tube wall of the arc tube at startup.
In the high pressure vapor discharge lamp with an external auxiliary conductor is stretched in the direction of the central axis of the arc tube and, on the support lead wire
One end of the fixed arc tube is separated from the external auxiliary conductor
When it moves in the direction
So that the auxiliary conductor is pressed in the direction of the arc tube wall.
The external auxiliary conductor is connected to the arc tube of the supporting lead wire.
Are crossed through the direction away from the external auxiliary conductor
High pressure vapor discharge lamp, characterized in that there.