JPS6260763B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a discharge lamp device in which a shell having a bulb base is fitted to the bottom of a discharge lamp, and electrical components such as a ballast are housed inside the shell.

Recently, various discharge lamp devices of this type have begun to be put into practical use as a substitute for incandescent light bulbs. however,
Since this discharge lamp device is intended to replace incandescent light bulbs, the overall shape and dimensions of the lamp will also be similar to those of incandescent light bulbs. For this reason, electrical components such as ballasts, glow starters, and noise prevention capacitors must be housed in a narrow shell space, and they must be electrically connected, making assembly difficult and preventing mass production. This had become a major obstacle for In addition, since the weight of these electrical parts, especially the weight of the ballast, is heavy, if the fixed part between the discharge lamp and the shell, which is usually glued with phenol resin, becomes loose due to aging etc., the discharge lamp will fall together with the ballast. There have been cases where accidents have occurred. Furthermore, since the discharge lamp and electrical components are placed close together, there are problems such as the glow starter malfunctioning due to the influence of heat from the discharge lamp, or shortening the lifespan of other electrical components. Was.

This invention was made in view of the above-mentioned circumstances, especially the difficulty in assembling.Thorough studies have been made on the electrical connection means of electrical parts, and even if it is formed into a shape equivalent to an incandescent light bulb, it will be easy to assemble. The object of the present invention is to provide a discharge lamp device that can improve the performance.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a discharge lamp. This discharge lamp 1 has the following configuration. That is, in order to form a discharge space, the bottom of a spherical glass outer tube 2 with an open bottom is hermetically closed with a disk-shaped ceramic end plate 5, and the inside is made of rare gas and mercury. Encloses a discharge medium. Further, four electrode lead wires 11 made of a conductive material whose tips are led out into the outer tube 2 are linearly shifted in one direction from the center of the end plate 5 and are planted airtight with an adhesive 14. Then, each of the two electrode lead wires 11 supports one electrode 12, and a pair of electrodes 12 is formed.
I am trying to make it so that Further, 6 is an inner tube that regulates the discharge path of the discharge generated between the electrodes 12. This inner tube 6 is formed by welding one ends of two straight glass tubes with their insides electrically connected, and is formed into a substantially U-shape. Two U-shaped glass tubes are prepared with semicircularly cut discharge guide holes 10 formed in the upper part of the plane passing through the tube, and these two U-shaped glass tubes are placed with their discharge guide holes 10 close to each other. , its discharge guide hole 1
A part of the periphery of the 0 is welded to form an integrated structure. And this inner tube 6 discharge guide hole 1
The end surface of the leg portion 8 on the side that does not have 0 is airtight enough to prevent a short circuit of discharge from occurring between at least the other electrode 12 on the end plate 5 surface with each of the pair of electrodes 12 contained therein. It is fixed with adhesive 14 while maintaining its state. In this state, the discharge induction hole 1
The end surface of the leg portion 9 on the 0 side is in contact with the end plate 5 surface. 7
is a phosphor layer coated on the inner surface of the inner tube 6, and this phosphor layer 7 is composed of approximately 32% trivalent europium-activated yttrium oxide phosphor (red phosphor) and trivalent terbium-activated yttrium oxide phosphor (red phosphor). It consists of a mixed phosphor consisting of lanthanum phosphate, approximately 45% cerium phosphor (green phosphor), strontium chlorophosphate activated with divalent europium, and approximately 23% barium phosphor (blue phosphor). . 4
15 is a diffusion film made of zirconium silicate coated on the inner surface of the outer tube 2, and 15 is a thin exhaust tube airtightly fixed to the end plate 5, with one end communicating with the inside of the outer tube 2. After the exhaust treatment is completed, the outer side is melt-sealed. The material of the exhaust tube 15 is appropriately selected from glass or metal.

Next, 17 is a shell fixed to the bottom of the discharge lamp 1 with an adhesive 13 mainly made of phenol resin. This shell 17 is made of polycarbonate resin, and includes a cylindrical portion 19 into which the neck portion 3 at the bottom of the outer tube 2 is fitted, and a rising portion whose diameter is reduced via a step portion 23 at one end of the cylindrical portion 19. 2
A first shell 18 integrally formed with 0 and an engaged portion 27 that is engaged with the outer circumference of the rising portion 20 of the first shell 18 are provided on one end side, and an incandescent light bulb is provided on the other end side. The first shell 18 and the second shell 26 constitute a series of outer shells. A plurality of engaging portions 21 consisting of recesses 22 that are inclined to become deeper toward the second shell 26 side are scattered on the outer circumference of the rising portion 20 of the first shell 18. The engaged portion 27 of 26 has a protrusion 28 that engages with the engaging portion 21 at a location corresponding to the engaging portion 21 of the first shell 18.
is formed. Further, inside the rising portion 20 of the first shell 18, a stabilizer support portion 24 for supporting a stabilizer 34, which will be described later, is integrally protruded. This stabilizer support part 24 is provided at a location corresponding to a corner of the stabilizer core 35, and a projecting piece 48 is formed in the center thereof with a recess 25 that can accommodate the corner.
It consists of

On the other hand, inside the second shell 26, a first
When the first shell 18 is engaged with the coil portion 36 of the ballast 34, the first shell 18
The stabilizer holding piece 29 which cooperates with the stabilizer support part 34 to clamp the stabilizer 34 and the hook part 32 which is slightly smaller than the width dimension of the stabilizer core 35 are attached to the hinge part 31.
A ballast suspension part 30 is integrally provided and hangs down through the ballast. 34 is a ballast held between the first shell 18 and the second shell 26 as described above, and is located on the second shell 26 side and opposite to the lead-out point of the electrode lead wire 11 of the discharge lamp 1. Two ballast terminals 38 are provided protruding from the sides. 42 is a holding portion for a terminal plate 43, which will be described later, which is implanted in the coil bobbin 37 of the stabilizer 34, and 40 is a wire guide piece integrally connected to the end of the coil bobbin 37 of the stabilizer 34; Two ballast cores 35 are formed on the opposite side of the ballast terminal 38, and a V according to the number of electric wires 49 is formed at the tip.
The letter-shaped grooves 41 are formed independently from each other.
43 is on the second shell 26 side of the ballast 34,
With the terminal board fixed by the terminal board holding part 42, the terminals 44 are arranged and planted on one end side, and a temperature fuse 45 is attached to the ballast 34 side, and the terminal board holding part 42 is fixed. In the fixed state, it is configured to abut against the surface of the ballast coil 36. Further, a glow starter 46 and a noise prevention capacitor 47 are attached to the side opposite to the side to which the temperature fuse 45 is attached, and these electrical components are electrically connected as appropriate and connected to the terminal 44. 51 is a heat radiation hole.

Next, assembly of the discharge lamp device configured as described above will be explained.

First, the discharge lamp 1 with the adhesive 13 applied to the neck part 3 is positioned so that the neck part 3 is on the upper side, and then the first shell 18 is attached to the neck part 3.
The first shell 18 is fitted onto the discharge lamp 1 and heated in this state to fix the first shell 18 to the discharge lamp 1. After that, the terminal plate 43 with the electrical components attached thereto is fixed to the terminal plate holding part 42 separately formed on the ballast 34, and the ballast 34 is attached to the ballast support part 24 of the first shell 18.
Place it on. Next, in order to form a predetermined lighting circuit, the electrode lead wire 11 of the discharge lamp 1 and the power wire 49 extending from the base 33 are electrically connected via the terminal 44 of the terminal board 43, and the lighting circuit is formed. Finalize. At this time, the electrode lead wires 11 led out from the discharge lamp 1 are individually electrically insulated by the wire guide pieces 40 and wired. After this, the second shell 26 is replaced with the first shell 18.
The assembly work of the discharge lamp device is completed by pushing the parts into engagement from above.

In the discharge lamp device of the above embodiment having such a configuration, the shell 17 is divided into two parts along a plane intersecting the axis of the shell 17, and one shell (the first shell 18) is fixed to the discharge lamp 1. Therefore, it is possible to fix the first shell 18 to the discharge lamp 1 before installing electrical components such as the ballast 34 into the shell 17, thereby preventing deterioration of the electrical components due to heat during the fixing process. It can be suppressed. In addition, since the first shell 18 supports the ballast 34 and the ballast 34 supports the terminal board 43 to which the glow starter 46 and the like are attached, all the wiring work for the lighting circuit is done on the terminal board 43. Since the process can be carried out with the terminal 44 as the center and can be carried out before the second shell 26 is attached, the work space is wide and the work is easy, and the length of the electric wires connecting each electrical component can be shortened. can. Furthermore, the ballast terminal 38 is connected to the second
The terminal plate 4
Terminal 44 of No. 3 is located opposite the ballast terminal 38;
In other words, since it is placed on the same side as the electrode lead wire 11 of the discharge lamp 1, the electrode lead wire 11
The terminal 44 of the terminal board 43 can be connected to the terminal 44 of the terminal board 43 over the shortest distance, and short circuit between the ballast terminal 38 and the electrode lead wire 11 can be prevented. Further, the electric wire 49 connecting the electrode lead wire 11 and the terminal 44 of the terminal plate 43 is separated and supported by the electric wire guide piece 40 which is formed to sandwich the ballast core 35. Short circuits due to contact between the electric wires and contact with the ballast core 35 can be prevented. Further, since the wire guide piece 40 is integrally connected to the coil bobbin 37 of the ballast 34, there is no need for particular positioning during assembly.
By installing the stabilizer 34 in a predetermined position,
It will be automatically placed in the specified position.

Since the temperature fuse 45 is positioned by the terminal plate 43 in contact with the coil 36 of the ballast 34, which is the most likely to catch fire among electrical components, the temperature fuse 45
ignition can be reliably prevented. Further, the terminal plate 43 has a glow starter 46 on the side opposite to the adhesive of the temperature fuse 45, that is, on the base 33 side.
A noise prevention capacitor 47 is arranged. Therefore, the discharge lamp 1 and the ballast 3 become hot.
Since it blocks the heat from 4, problems such as malfunctions and deterioration due to high temperatures resulting in short lifespans are solved.

The engagement between the second shell 26 and the first shell 18 is achieved by pushing the second shell 26 into the first shell 18 so that the protrusion of the second shell 26 is inserted into the recess 22 of the first shell 18. 28 are configured to engage and lock resiliently. Therefore, the engagement between the two divided shells 18 and 26 is strong against vertical forces, and has sufficient strength to withstand torque applied when the discharge lamp 1 is attached or detached. In this case, it goes without saying that if adhesive is applied to the engaging portions of the two split shells 18 and 26, the engagement strength will be further increased. Further, when the second shell 26 is engaged with the first shell 18, the ballast suspension part 30 is attached to the discharge lamp 1 of the ballast core 35.
It will support the side surface. Therefore, even if the first shell 18 and the second shell 26 become disengaged, the ballast 34 will remain suspended within the second shell 26, which is screwed onto a fixed light bulb socket (not shown). Even if the discharge lamp 1 falls, the ballast 34 will not fall.

In the above embodiment, a rare earth phosphor was used as the phosphor adhered to the inner tube 6 of the discharge lamp 1, but the invention is not limited to this, and known methods may be used in response to various requirements. A variety of fluorophores can be used. Furthermore, if a fine powder alumina layer (not shown) is formed between the phosphor layer 7 and the inner tube 6, the phosphor layer 7 will be It is possible to prevent the luminous efficiency from decreasing.

Furthermore, the structure of the inner tube 6 of the discharge lamp 1 may be other than those of the above-mentioned embodiments. The material of the end plate 5 can be arbitrarily selected from ceramic, chrome steel, glass, etc.
Furthermore, the end plate 5 may be directly welded and fixed to the outer tube 2 without using the adhesive 14.

Furthermore, when the outer tube 2 and the inner tube 6 are fixed to the end plate 5 with the adhesive 14, the adhesive 14 is the same as the adhesive 13 used for fixing the shell 17 and the outer tube 2.
By choosing a material with a higher fixation temperature than
During the work of fixing the shell 17, it is possible to prevent the fixed parts of the inner tube 6 and the outer tube 2 from becoming soft and causing poor fixation.

As described above, according to the present invention, there is provided a discharge lamp having an electrode lead wire led out from the bottom thereof, and a shell having a cap at one end and having the other end fixed to the bottom of the discharge lamp so as to surround the electrode lead wire. , a ballast housed within this shell, a ballast provided in this ballast,
Since the electric wire holding plate is provided to hold the plurality of electric wires connected to the electrode lead wires in an insulated state from each other, there is an advantage that the wiring work in the assembly process can be facilitated.

[Brief explanation of the drawing]

The figures all show embodiments of the present invention; FIG. 1 is an exploded perspective view partially cut away, FIG. 2 is a sectional view, and FIG. 3 is an exploded perspective view partially cut away of a discharge lamp. 4 is a perspective view showing the structure of a wire guide piece and a guide bobbin, and FIG. 5 is a perspective view of a wire guide piece according to another embodiment of the present invention. In the figure, 1 is a discharge lamp, 11 is an electrode lead wire,
17 is a shell, 34 is a stabilizer, and 40 is a wire guide piece. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. A discharge lamp having an electrode lead wire led out from the bottom, a shell having a cap at one end and the other end fixed to the bottom of the discharge lamp so as to surround the electrode lead wire, and within this shell. 1. A discharge lamp device comprising: a ballast housed in a ballast; and a wire guide piece provided in the ballast and holding a plurality of electric wires connected to the electrode lead wires in an insulated state from each other. 2. Claim 1, characterized in that the wire guide piece is integrally formed with the ballast coil bobbin.
The discharge lamp device described in Section 1. 3. The discharge lamp device according to claim 1 or 2, wherein the electric wire guide piece has a V-shaped notch at the top that is a dovetail groove that can hold the electric wire.