JPS59196555A - High pressure metal vapor discharge lamp - Google Patents

Abstract

PURPOSE:To arrange a luminous tube inside an outer tube bulb in a pose of the tube axis crossing the bulb axis almost at a right angle even when tube length at the luminous tube bigger than the inner diameter of the neck part by joining the intermediate part of a support holding the luminous tube with a spring member. CONSTITUTION:When housing a luminous tube 4 inside an outer bulb, a mounting member holding the luminous tube 4 is inserted from an opening end of the neck part 2. Thereby, if a stem 9 is tilted in the direction of an arrow A while prying, a leaf spring 20 provided halfway on a supporting wire 11 is elastrically deformed while bending the supporting wire 11. Accordingly, a tube axis O1-O1 of the luminous tube 4 tilts to a bulb axis O2-O2. In this way, the luminous tube 4 passes the neck part 2 in a tilted state and when reaching the largest diameter part of the outer bulb 1, the supporting wire 11 restores the former state due to a return of the leaf spring 20, while the luminous tube 4 takes such a pose as the tube axis O1-O1 crosses the bulb axis O2-O2 almost at a right angle.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a high-pressure metal vapor discharge lamp in which an arc tube is disposed within an outer bulb with the axis of the arc tube substantially perpendicular to the outer bulb/globe axis. Regarding.

[Technical background of the invention and its problems]

High-pressure metal vapor discharge lamps, in which a luminescent metal and a rare gas are sealed in an arc tube having electrodes, are used in a wide variety of applications because of their excellent light efficiency, high brightness, and long life. This type of discharge lamp has a double tube structure in which the luminous tube is housed in an outer tube through a mount member, and a cap attached to one end of the outer tube is screwed into a socket, and the cap is connected to the mount member. Electricity is supplied to the luminous tube through it. Conventionally, the tube axis of the arc tube along the electrode axis direction is arranged so as to coincide with the tube axis of the outer bulb/globe, and therefore the lighting direction is determined by the direction of the cap. In other words, when used with the cap facing upward, the arc tube will be lit vertically, with the tube axis running in the vertical direction, and when used with the cap sideways (horizontally), the tube axis of the arc tube will also be along the horizontal direction, resulting in horizontal lighting. Ta. However, when the arc tube is used in a horizontal position, the arc tends to curve upward due to gas convection within the arc tube, which has the disadvantage that the light efficiency decreases by 5 to 10 inches for the same rung compared to when the arc tube is lit vertically.

Therefore, it is advantageous to use the arc tube in a vertical position.

By the way, this type of high-pressure metal vapor discharge lamp is becoming more compact and being used for indoor lighting. In indoor lighting, depending on the installation location, space, light distribution, and other conditions of the lighting equipment, it may be necessary to use the lamp with the base facing sideways and the bulb shaft of the outer tube pulp in a horizontal position. At this time, even if the outer tube pulp is used in a horizontal position, if the arc tube housed inside is in a vertical position, the reduction in light efficiency can be prevented. Therefore, when an arc tube is supported in an outer bulb pulp, research is being conducted on the development of a discharge lamp in which the arc tube is housed in a posture such that the tube axis of the arc tube is substantially perpendicular to the outer bulb bulb axis.

However, in the case of a lamp in which the arc tube is housed with the outer tube pulp and its axial direction generally orthogonal to each other as described above, if the length of the arc tube is larger than the inner diameter of the neck of the outer tube pulp, it is necessary to emit light in advance. Even when trying to insert the tube into the outer tube bulb with the tube supported by the mount member in a predetermined posture, the arc tube cannot pass through the neck, and in addition, the support wire of the mount member is also bent into an arched shape. Therefore, the support wire cannot pass through the neck, and therefore, the arc tube cannot be accommodated.

[Purpose of the invention]

The present invention was made based on the above circumstances, and its purpose is to place the arc tube inside the outer bulb even if the length of the arc tube is larger than the inner diameter of the neck of the outer bulb pulp. It is an object of the present invention to provide a high-pressure metal vapor discharge lamp that can be arranged with the tube axis substantially perpendicular to the bulb axis and that can be realized with a simple structure.

[Summary of the invention]

That is, in the present invention, a support that supports an arc tube is connected in the middle by a spring member, and the support is bent and deformed via this spring member, so that the arc tube supported by the support via a holder is tilted. It is possible to pass through the neck of the outer tube and groove, and inside the outer tube, the support returns to its normal position by the return of the spring member, so the arc tube's tube axis is approximately perpendicular to the outer tube and groove axis. It is characterized in that it is arranged in this manner.

[Embodiments of the invention]

An embodiment of the present invention applied to a small metal halide lung will be described below with reference to FIGS. 1 to 3.

In the figure, 1 indicates an outer tube pulp, which has a spindle shape with a neck portion 2 at one end. The inner diameter of the neck portion 2 is indicated by a beam, and a cap 3 is attached to the end of the neck portion 2.

Reference numeral 4 denotes an arc tube, which is made of quartz glass and is formed into, for example, an elliptical or spherical shape. Main electrodes 5a and 5b are provided in the arc tube 4 to face each other, and
As shown in FIG. 2, an auxiliary starting electrode 6 is provided adjacent to one of the main electrodes 5a. These main electrodes 5a,
5b and the auxiliary electrode 6 are a power supply line 7a outside the arc tube 4.

7b and 8. Inside the arc tube 4, mercury and a metal halide, such as S c I s -Na
1 and a rare gas for starting are sealed.

Reference numeral 9 denotes a stem sealed at the neck end of the outer tube pulp 1, and lead wires 10a and 10b are sealed to the stem 9. These lead wires 10h and IOb are the base 3
and is connected to the center terminal 3a of this base. A support wire 11 that also serves as a power supply line is welded to the lead wire 10tL. And this support 11 and lead wire J
A starting device is mechanically and electrically connected to ob. As shown in the circuit diagram in FIG. 2, the starting device consists of a lighting tube 12, a current limiting resistor 13, a normally closed bimetal switch 14, and an auxiliary resistor 15. The secondary current of the lamp 17 is applied to the lighting tube I2, and by blinking the lighting tube 12, a main pulse is generated, and this main pulse is connected to the auxiliary electrode 6 and the main electrode 5a adjacent thereto. This discharge is applied between the main electrodes 5a and 5b to start the discharge, and this discharge shifts to the main discharge between the main electrodes 5a and 5b, thereby starting the lamp. The power bimetal switch 14 is opened while the lamp is on.

The support wire 11 is divided into a distal end side and a proximal end side at a position close to the maximum diameter part of the outer tube bulb 1, and a leaf spring 20 as a spring member, for example, 2 width wide and 0 plate thickness, is inserted between these parts.
．． It is joined by a plate spring made by stacking multiple 3m+ stainless steel plates or nickel plates. Above leaf spring 2
A hinge 21 is welded to 0, and a support par 22 is rotatably connected to this hinge 21. The support part 22 is a holder 23 that holds one end sealing part of the arc tube 4.
is welded to. Therefore, the arc tube 4 has a tube axis of 0.0 with the hinge 21 as the center. It can be rotated so that the -01 direction is oblique with respect to the valve axis 0t-Ot of the outer tube valve 1. Note that the tube axis of the arc tube 4 is located between the holder 23 and the support wire 11. -0. is the valve shaft 0. -0.
Spring 24 to maintain the posture almost perpendicular to
However, the bridge has been passed.

According to such a configuration, when the arc tube 4 is accommodated in the outer tube pulp 1, the arc tube 4 can be tilted as shown in FIG. That is, the mount member supporting the arc tube 4 is inserted from the open end of the neck portion 2, but at this time, the other end of the arc tube 4 is placed against the inner surface of the neck portion 2 and the stem 9 is inserted.
When the support wire 11 is tilted in the direction of arrow A, the leaf spring 20 provided in the middle of the support wire 11 is elastically deformed and the support wire 11 is bent. Therefore, the tube axis of the arc tube 4 is 0. −
01 is the valve shaft O! - The mount can be inserted into the neck portion 2 because it is tilted toward 〇t and the support wire 11 is also deformed.

In addition, at this time, the arc tube 4 can only be elastically deformed by the plate spring 2θ.
If the inclination is insufficient, the hinge 20 and the support rod 22 are rotated relative to each other, and the arc tube 4 can be tilted in a state where the neck portion can pass through against the elastic force of the spring 24.

In this way, when the arc tube 4 passes through the neck part 2 in an inclined state and reaches the maximum diameter part of the outer tube/group 1, the leaf spring 2
Based on the return to zero, the support wire 11 is returned to its original state, thereby restoring the inclination of the arc tube 4. Therefore, the arc tube 4 has a tube axis of 0. -0. is the valve shaft 0. -0
The posture will be approximately perpendicular to ゜. In this case, the return force of the spring 24 keeps the arc tube 4 in an upright state.

With such a configuration, the length of the arc tube 4 is larger than the inner diameter D1 of the neck portion 2 (L>DI), and the tube axis 0I01 of the arc tube 4 is the pulp axis 0. -0.
Even if the lamp is disposed approximately perpendicular to the lamp, the arc tube 4 can be easily inserted. Particularly in the case where a starting circuit is provided at the base of the support wire 110, it is difficult to insert a jig or the like from the open end of the neck portion 2 to knock down the arc tube 4 during the insertion work of the arc tube 4 due to the presence of the starting circuit. Since this becomes possible, it is also advantageous for those having such a starting circuit.

In the above embodiment, an example was described in which the leaf spring 20 was provided at the connection point between the support wire 1 and the arc tube holder 23, but the present invention is not limited to this.
It may be done as shown in the figure. In other words, in the case of Fig. 4, leaf spring 4
o is provided at the bending point of the proximal end of the support wire 1, and even with this arrangement, the arc tube 4 can be tilted by bending the support wire 11.

Therefore, in short, the present invention makes it possible to tilt the arc tube supported by the support wire via the holder based on the bending deformation of the support wire, so the mounting position of the leaf spring is always fixed. This is the range from the point where the arc tube can be tilted, that is, the point where the support wire joins the holder to the base end.

Note that the present invention is applicable not only to metal halide lamps but also to high-pressure mercury lamps and high-pressure (IJ) lamps.

〔Effect of the invention〕

As described above, according to the present invention, the arc tube can be tilted by the support being urged to bend and deform by the leaf spring attached in the middle of the support, so that the neck part of the outer tube pulp can be smoothly moved. The arc tube inserted into the outer tube is held in a position where the tube axis is substantially perpendicular to the pulp axis based on the restoration of the support by the return of the leaf spring. Moreover, it has the advantage of being simple in structure and easy to operate.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention. Figure 1 is a configuration diagram of a metal halide lamp in an assembled state, Figure 2 is its circuit diagram, and Figure 3 is an explanatory diagram when the arc tube is inserted. be. FIG. 4 shows another embodiment of the present invention and is an explanatory diagram when the arc tube is inserted. DESCRIPTION OF SYMBOLS 1... Outer tube pulp, 2... Neck part, 3... Cap, 4... Arc tube, 1... Support wire, 20.
40... Leaf spring, 23... Holder, 21... Hinge.

Claims (2)

[Claims] (1) An arc tube is housed in the outer tube pulp, and the length of the arc tube is larger than the outer diameter of the neck of the outer tube pulp, and the tube axis of the arc tube is the pulp axis of the outer tube pulp. In a high-pressure metal vapor discharge lamp held in an almost perpendicular position,
A high-pressure metal vapor discharger characterized in that a holder supporting one end of the arc tube is connected to the satate, and the support is connected by a spring member within a range from the connection part with the holder to the base end. electric light. (2) The high-pressure metal vapor discharge lamp according to claim (1), further comprising a hinge mechanism provided between the holder and the support to allow the arc tube to tilt.