JPS6260764B2 - - 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 a ballast, a glow starter, and a noise prevention capacitor must be housed in a narrow shell space, and they must be electrically connected, making assembly difficult. This was a major obstacle to mass production. In addition, because 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 this has led to accidents. 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, and after thorough consideration was given to the support structure of electrical parts and the structure of the shell, even if the structure is formed into a shape equivalent to an incandescent light bulb, it can be easily assembled. The present invention aims to provide a discharge lamp device that can improve 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. On the other hand, on the end plate 5, four electrode lead wires 11 made of a conductive material, one end of which is led out to the outside and the tip of which is led out into the outer tube 2, are linearly shifted in one direction from the center of the end plate 5. It is installed airtight with adhesive 14. 1 for each of the two electrode lead wires 11.
The electrodes 12 are supported to form a pair of electrodes 12. 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 semi-circular discharge guide holes 10 are prepared at the upper part of the plane passing through 9,
Further, these two U-shaped glass tubes are manufactured as an integrated product by welding a part of the periphery of the discharge guide hole 10 with the discharge guide holes 10 of the two U-shaped glass tubes close to each other. The end surface of the leg portion 8 on the side of the inner tube 6 that does not have the discharge guide hole 10 is connected to the pair of electrodes 12.
are fixed on the surface of the end plate 5 with an adhesive 14 while maintaining an airtight state to the extent that a discharge short circuit does not occur between at least the other electrode 12. In this state, the end surface of the leg portion 9 on the discharge induction hole 10 side is in contact with the end plate 5 surface. Reference numeral 7 denotes 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). Active lanthanum phosphate, cerium phosphor (green phosphor) approx. 45%, divalent europium activated strontium chlorophosphate, barium phosphor (blue phosphor) approx.
It consists of 23% mixed phosphor. Reference numeral 4 denotes a diffusion film made of zirconium silicate coated on the inner surface of the outer tube 2, and 15 denotes an exhaust thin tube airtightly fixed to the end plate 5, one end of which communicates with the inside of the outer tube 2.
After the exhaust treatment of the outer tube 2 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 form a series of outer shells. At the outer circumference of the rising portion 20 of the first shell 18, an engaging portion 21 is formed of a recess 22 that is inclined to become deeper toward the second shell 26.
On the other hand, the engaged portion 27 of the second shell 28 has a protrusion 28 that engages with the engaging portion 21 of the first shell 18 at a location corresponding to the engaging portion 21 of the first shell 18. ing. 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. The ballast support portion 24 is provided at a location corresponding to the corner of the ballast core 35, and is made up of a projecting piece 48 having a recess 25 formed in the center to accommodate the corner. On the other hand, the inside of the second shell 26 is in contact with the iron core surface part 50 of the stabilizer 34 in a state where it is engaged with the first shell 18, and is in contact with the stabilizer support part 24 of the first shell 18. a stabilizer holding piece 29 that works to clamp the stabilizer 34;
A stabilizer hanging part 30 is integrally provided with a hook part 32, which is slightly smaller in width than the stabilizer core 35, suspended via a hinge part 31. 34 is a stabilizer held between the first shell 18 and the second shell 26 as described above, and the second shell 26
side, and the electrode lead wire 11 of the discharge lamp 1
Two ballast terminals 38 are provided in a protruding manner at positions opposite to the lead-out points. 42 is the stabilizer 34
A holding portion 40 of a terminal plate 43, which will be described later, is implanted in the coil bobbin 37 of the ballast 34, and is a wire guide piece integrally connected to the end of the coil bobbin 37 of the ballast 34, opposite to the ballast terminal 38. Two V-shaped grooves 41 are formed on the sides with the ballast core 35 sandwiched between them, and V-shaped grooves 41 corresponding to the number of electric wires 49 are formed independently from each other at the tips. Reference numeral 43 denotes a terminal plate fixed to the second shell 26 side of the ballast 34 by the terminal plate holding portion 42, with the terminal 44 on one end side.
Further, a temperature fuse 45 is attached to the ballast 34 side so that it comes into contact with the surface of the ballast coil 36 when it is fixed to the terminal plate holder 42. Also, on the side opposite to the side where the temperature fuse 45 is attached, there is a glow starter 46.
and a noise prevention capacitor 47 are attached, these electrical components are electrically connected as appropriate, and the terminal 44
It is connected to the. 51 is a heat radiation hole.

Next, the 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 completed. let 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 work can be carried out with the terminal 44 as the center and can be carried out before the attachment of the second shell 26, the work space can be increased, the work can be made easier, and the length of the electric wires connecting each electrical component can be shortened. Can be done. Further, the ballast terminal 38 is arranged on the second shell 26 side and on the opposite side to the lead-out point of the electrode lead wire 11 of the discharge lamp 1.
Since the terminal 44 of No. 3 is placed on the opposite side of the ballast terminal 38, that is, on the same side as the electrode lead wire 11 of the discharge lamp 1, the connection between the electrode lead wire 11 and the terminal 44 of the terminal plate 43 is This can be done over the shortest distance, and short circuits between the ballast terminal 38 and the electrode lead wire 11 can be prevented. Furthermore, 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 electric wires and contact with the ballast core 35 can be prevented. Furthermore, 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, and by installing the ballast 34 in a predetermined position, it can be automatically placed in a designated 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 side where the temperature fuse 45 is attached, 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 heat from 4, problems such as malfunctions and deterioration due to high temperatures resulting in short life can be 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 divided shells 18 and 26, the strength of the engagement will be further increased. Further, when the second shell 26 is engaged with the first shell 18, the ballast suspension portion 30 is in a state of supporting the surface of the ballast core 35 on the discharge lamp 1 side. For this reason, if the first
Even if the engagement between the shell 18 and the second shell 26 is disengaged, the ballast 34 will remain suspended within the second shell 26 screwed onto a fixed light bulb socket (not shown), and the discharge lamp 1 will not fall. However, the stabilizer 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; a ballast mounted on the ballast support part of the first shell at a distance from the bottom of the lamp; a ballast containing the ballast and one end of which is engaged with the second shell engaging part of the first shell; Since the second shell is provided with a cap at the other end, there is an advantage that the manufacturing process, especially the assembly work of electrical parts around the ballast, is easy.

[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. , FIG. 4 is a partially cutaway perspective view of the first shell. In the figure, 1 is a discharge lamp, 18 is a first shell,
20 is a rising portion, 21 is an engaging portion, 24 is a stabilizer support portion, 26 is a second shell, 33 is a base, and 34 is a stabilizer. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. A discharge lamp, a first shell that is fitted into the bottom of the discharge lamp and has a rising portion with a second shell engaging portion on the outside and a ballast support portion on the inside; A ballast mounted on the ballast support part of the first shell at a distance from the bottom of the lamp; the ballast is contained therein, one end engages with the second shell engaging part of the first shell, and the other end engages with the second shell engaging part of the first shell; and a second shell provided with a base. 2. The discharge lamp device according to claim 1, wherein the ballast support portion is composed of a plurality of protruding pieces on which the iron core surface of the ballast is placed. 3. The discharge lamp device according to claim 1 or 2, wherein the ballast support portion is constituted by a protruding piece having a recess for accommodating a part of the iron core of the ballast.