JPH02155108A - Electric discharge lamp unit - Google Patents

Abstract

PURPOSE:To adjust the position of a shade over a wide range so as to simplify the work of uniting a base body with the shade by filling and solidifying a synthetic resin within a space enclosed with a barrel portion provided on the base of the shade in such a condition that the barrel portal is butted with the front edge of the base body, and then uniting the base body with the shade. CONSTITUTION:A barrel portion 27 is provided on the base of a shade 24, and ten a synthetic resin is filled and solidified within a space enclosed with the barrel portion 27 in such a condition that the barrel portion 27 is butted with the front edge of a base body 9, so that the base body 9 may be united with the shape 24 via the filled synthetic resin. Consequently, the shade 24 can be moved over a fairly wide range against the base body 9 before the synthetic resin is filled within the space enclosed with the barrel portion 27. For this reason, a positioning of an electric discharge lamp 2 supported with the base body 9 via each of a bearing supports 16, 17 can be sufficiently made. Since the shade 24 also can secured to the base body 9 by filling the synthetic resin within the space enclosed with the barrel portion in such a condition that the shade 24 is butted at its basic end with the front edge of the base body 9, the work of uniting the shade 24 with the base body 9 may be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION The discharge lamp device of the present invention will be described in detail according to the following items.

A. a. Field of industrial application B1. Overview of the invention C1. Background art 1. Problem to be solved by the invention E0. Means for solving the problem F. Examples [Figs. 1 to 4] a. Discharge lamp b8 Base part b-13 Base body b-2, Terminal fitting b-3, Support support b-4, Metal support b-5, Shade C0 Discharge lamp mounting G0 Effects of the invention (A, industrial application field) Book The invention relates to a novel discharge lamp device. Specifically, it is an object of the present invention to provide a novel discharge lamp device having a shade that covers a part of the discharge lamp, which allows the position of the shade to be adjusted and also makes it easy to attach the shade to the base body. That is.

(B. Summary of the Invention) The discharge lamp device of the present invention includes a cylindrical portion provided at the base of the shade, and a space surrounded by the cylindrical portion with the cylindrical portion abutted against the front end of the base body, which is filled and solidified with synthetic resin. However, the base body and the shade are connected by the filled synthetic resin, and therefore, the shade can be moved within a considerable range with respect to the base body, so the position of the shade can be adjusted over a wide range. In addition, since the base body and the shade are connected by filling the space surrounded by the cylindrical portion with synthetic resin, the work of connecting the base body and the shade is easy.

(C. Background Art) There is a strong demand for high luminous intensity in automobile headlamps, and recently attempts have been made to use discharge lamps as light sources.

(D. Problem to be Solved by the Invention) Incidentally, the light distribution pattern of an automobile headlamp is extremely important.

A sharp cut line is formed at the upper edge of the light distribution pattern of the passing beam, and there are several methods for creating this.

Among these methods, there is a method in which a part of the light source is shielded from the reflecting mirror. In such a system, it is important that the positional relationship between the shade that partially blocks the light source and the light source is precisely defined, and for this purpose, it is necessary to be able to adjust the position of the shade with respect to the light source. is necessary.

(E. Means for Solving the Problems) In order to solve the above-mentioned problems, the discharge lamp device of the present invention provides a cylindrical portion at the base of the shade, and the cylindrical portion is abutted against the front end of the base body. A synthetic resin is filled and solidified in the space surrounded by the parts, and the cap body and the shade are connected by the filled synthetic resin.

Therefore, in the discharge lamp device of the present invention, the shade can be moved within a considerable range with respect to the base body before the synthetic resin is filled into the space surrounded by the cylindrical portion. It becomes possible to sufficiently adjust the position of the discharge lamp supported by the base body.

In addition, the shade can be attached to the cap body by filling the space surrounded by the cylinder with synthetic resin while the base end of the shade is butted against the front end of the cap body. The joining process is easy.

(F. Example) [Figures 1 to 4] Details of the discharge lamp device of the present invention will be described below according to Example 1 illustrated in the drawings.

(a, Discharge Lamp) 2 is a metal halide discharge lamp, in which both ends of a glass tube are pinch-sealed to form a central discharge space 3 and continuous pinch-sealed portions 4.4 at both ends thereof.

5.5 is a metal foil sealed separately in the pinch seal parts 4, 4, 6.6 is an electrode rod, and the electrode rod 6.6 has one end 6a, the part other than 6a is inside the pinch seal part 4. The other end is connected to the metal foil 5.5.

The one ends 6a, 6a of the electrode rod 6.6 protrude into the discharge space 3 and form discharge electrodes.

7.7 is a lead wire, the negative half of which is sealed within the pinch seal portion 4.4 and connected to the metal foil 5.5;
The other parts protrude from the outer end surface of the pinch seal part 4.4 in opposite directions.

(b, Base Portion) Reference numeral 8 denotes a base portion on which the discharge lamp 2 is supported, and includes a base body made of synthetic resin, two supports, a shade, a metal support, and the like.

(b-1, Base Body) 9 is a base body made of synthetic resin. The base body 9 has a substantially horizontally tilted shape when viewed from the side, and is integrally formed with a lamp holding part 10 extending in the front-back direction and a connector part 11 extending downward from the rear end of the lamp holding part lO. It consists of being done.

The connector part 11 has a recess 12 that opens downward, and the recess 12 has an oval shape that is long in the left and right direction when viewed from below, and is divided into an upper part 12a and a lower half part 12b. Therefore, the lower half part 12b is formed larger in both width and length than the upper half part 12a. Reference numeral 13 denotes a partition formed at the center in the left-right direction of the upper part 12a of the recess 12, and the partition 13 allows the upper half 12a of the recess 12 to
is separated into two parts, left and right.

Note that 10a is a flange formed on the outer surface of a portion of the lamp holding portion 10 near the front end.

(b-2, Terminal Metal Fitting) Reference numeral 14.15 indicates a terminal metal fitting, which has a substantially upside down shape when viewed from the side.

The terminal fitting 14.15 has a horizontal portion 14a extending in the front-rear direction,
15a, vertical portions 14b and 15b extending in the vertical direction,
Intermediate portions 14c and t5c connecting the rear ends of the horizontal portions 14a and 15a and the upper ends of the vertical portions 14b and 15b are integrally formed of a conductive metal material.

The intermediate portions 14c and 15c extend in the left-right direction, and when viewed from the rear, the rear end of the horizontal portion 14a is connected to the right end of the intermediate portion 14c, and the rear edge of the upper end portion of the vertical portion 14b is connected to the left end of the intermediate portion 14c. The rear end of the horizontal portion 15a is connected to the left end of the intermediate portion 15c, and the rear edge of the upper end portion of the vertical portion 15b is connected to the right end.

The intermediate portion of the terminal fittings 14, 15 is embedded in the base body 9 by so-called insert molding. The front end portions of the horizontal portions 14a and 15a protrude from the front end surface of the lamp holding portion 10 of the base body 9, and the vertical portion 14
The substantially lower half portions of the connector portions b and 15b are respectively projected into two spaces separated by a partition wall of the upper half portion 12a of the recessed portion 12 of the connector portion 11.

Then, horizontal parts 14a and 15a of each terminal fitting 14.15
are located side by side under the road, and the vertical parts 14b and 15
b is spaced from the left and right.

(b-3, Support Support) 16.17 is a support made of a conductive metal material, and horizontal parts 16a and 17a each extend in the front and back direction.
and vertical portions 16b, 17b extending in the vertical direction are integrally formed.

The length of the horizontal part 16a is about 1/4 to 18 times the length of the horizontal part 17a, the vertical part tab extends downward from the rear end of the horizontal part lea, and the vertical part 17b is behind the horizontal part 17a. It extends upward from the end.

The vertical portion 16b of the support 16 is welded to the front end of the horizontal portion 14a of the terminal fitting 14, and the vertical portion 17b of the support 17 is welded to the front end of the horizontal portion 15a of the terminal fitting 15.

This allows the horizontal part 16a of the support support 16.17 to
, 17a protrude forward from the front end of the lamp holding portion 10 of the base body 9, and are connected to the terminal fittings 14 and 15 separately.

18 is an insulating sleeve made of glass or ceramics, and the horizontal part 17a of the longer support 17
It is fitted around the rear half of the body.

(b-4, Metal Support) Reference numerals 19 and 19' denote metal supports, which are made of conductive metal plates, and both have substantially the same shape.

The metal support 19.19' has an oval-shaped side profile, and the base 20.20' is curled into a tubular shape. Base 20. Two bases from the front half of 20', 20'
A 0-shaped groove is formed in the supporting part 21, 21' extending in a direction perpendicular to the axial direction of the support part 21. A support piece 22.22' is formed, the support piece 22.22'
A mounting groove 23.23' is formed between the support portion 21.21' and the distal end of the support portion 21.21'.

The metal support 19, 19' as described above has its base 20
, 20' are the horizontal parts 16a, 1 of the support support 16.17
The base 20.7a is slidably fitted onto the front end of the metal support 19.7a, and in this state the elasticity of the material of the metal support 19.19' causes the base 20.
20' is pressed against the support support 16.17 and maintains its position unless a force is applied to rotate the metal support 19.19' relative to the support support 16.17.

One of the metal supports 19 has its support part 21 hanging down from the tip of the horizontal part 16a of the support support 16, and the other metal support 19' has its support part 21' suspended from the horizontal part of the support support 17. It is assumed that it stands up from the tip of 17a. In this state, the mounting grooves 23, 23' of the metal support 19, 19' are located approximately on a line extending along the axial direction of the lamp holder 10 of the base body 9.

Then, these metal supports 19.19' are rotated relative to the support support 16.17 to adjust their posture, and when the adjustment is completed, the base 20.20' is moved to the horizontal part 16a of the support support 16.17, It is fixed to the front end of 17a by spot welding. Incidentally, such fixing is done when installing the discharge lamp, which will be described later.

(b-5, Shade) 24 is a shade, which is made of ceramics.

The base 25 of the shade 24 has a disk shape, and a vertically long oval-shaped insertion hole 26 is formed in the center.

Reference numeral 27 denotes a short cylindrical portion that integrally projects forward from the edge of the insertion hole 26, and a light shielding portion 28 in the shape of a 0-shaped gutter that opens upward from the lower half of the cylindrical portion and is closed at the front end. is integrally protruded toward the front. A shallow notch 28a is formed at the upper edge of the light shielding portion 28 on the right side when viewed from the rear. This notch 28a limits the cut line on the driving lane side in the light distribution pattern of the passing beam.

Reference numeral 29 denotes a support hole formed near the lower end of the front wall 28b of the light shielding part 28.

Such a shade 24 is fixed to the front end portion of the lamp holding portion 10 of the base body 9 by its base portion 25 and cylindrical portion 27.

Note that details of this fixing will be described later. At this time, the front end of the horizontal portion 17a of the lower support 17 is connected to the light shielding portion 2.
The support hole 29 formed in the front wall 28b of 8 is fitted into the support hole 29,
Moreover, it is fixed by an inorganic adhesive 30.

Reference numeral 31 denotes a synthetic resin filled in the space in the cylindrical portion 27 of the shade 24 from the front end to the slightly rear side. It is filled with resin and cured by heating.

Thereby, the base body 9, the support supports 16, 17, and the shade 24 are firmly integrated.

Before filling the synthetic resin 31, the position of the shade 24 with respect to the base body 9, that is, with respect to the discharge lamp 2 supported by the base body 9, is adjusted, and the adjusted position is temporarily fixed or cured. Filling with the synthetic resin is carried out while maintaining the state with a tool.

Reference numeral 32 denotes an inorganic adhesive filled and solidified between the front end surface of the cylindrical portion 27 of the shade 24 and the front end surface of the filling synthetic resin 31.

(c. Attachment of the discharge lamp) The discharge lamp 2 is attached to the base portion 8 before the synthetic resin 31 and adhesive 32 are filled.

Lead wire 7.7 of discharge lamp 2 connects to metal support 19.19
' is inserted into the mounting groove 23.23', and this mounting groove 23
．． The position is adjusted by moving it back and forth and up and down within 23'. When the position adjustment is completed, the lead wire 7.7 is connected to the support portion 21.21' of the metal support 19.19'.
and are fixed to the support pieces 22, 22' by spot welding.

On the other hand, the metal support 19.19' is the support support 16, l
This allows adjustment in the left-right direction as it can be rotated relative to the front.

Once the position of the discharge lamp 2 has been adjusted as described above, the synthetic resin 31 and the inorganic adhesive 32 described above are filled.

Note that by filling the synthetic resin 31 and the inorganic adhesive 32, the base end portion of the insulating sleeve 18 described above is embedded therein. Further, the front end of the insulating sleeve 18 is located at a location corresponding to the center of the discharge space 3 of the discharge lamp 2.

Note that the insulating sleeve 18 may cover the support support 17 up to the front thereof.

Further, the light shielding part 28 of the shade 24 is positioned so as to cover substantially the lower half of the discharge space 3 of the discharge lamp 2.

(G. Effects of the Invention) As is clear from the above description, the discharge lamp device of the present invention is a discharge lamp having two lead wires protruding in opposite directions from the pinch seal portions located at both ends of the discharge space. There are two support supports protruding from the base body whose tips are spaced apart from each other in the front and back, and which separately support the two lead wires of the discharge lamp at the front and back tips, and a cylindrical part at the base. A gutter-shaped light shielding part is formed which projects forward from the cylindrical part and has a closed front end, and the cylindrical part surrounds the bases of the two supports, and the light shielding part a shade whose base portion is joined to the base body so as to cover a portion of the discharge lamp; and a filling synthetic resin which is filled in a space surrounded by the cylindrical portion of the shade and joins the shade and the base body. It is characterized by having the following.

Therefore, in the discharge lamp device of the present invention, the shade can be moved within a considerable range with respect to the base body before the synthetic resin is filled into the space surrounded by the cylindrical portion. It becomes possible to sufficiently adjust the position of the discharge lamp supported by the base body.

In addition, the shade can be attached to the cap body by filling the space surrounded by the cylinder with synthetic resin while the base end of the shade is butted against the front end of the cap body. The joining process is easy.

FIG. 4 is an enlarged sectional view taken along the +v-rv line in FIG. 2.

Explanation of symbols 1... Discharge lamp device, 2... Discharge lamp, 3... Discharge space, 4... Pinch seal portion, 7... Lead wire, 9... Base body, 16.17・
...Support support, 24...Shade, 27...Cylinder part, 28...
Light shielding part, 31...Filled synthetic resin top Applicant Koito Seisakusho Co., Ltd.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the discharge lamp device of the present invention, in which FIG. 1 is an exploded perspective view, FIG. 2 is a vertical cross-sectional view, and FIG. 3 is an enlarged cross-sectional view taken along line III--III in FIG. ...Discharge lamp device, enlarged sectional view <m-y:r weave) Fig. 3 enlarged sectional view Fig. 4 UV-IV2 spring)

Claims (1)

[Claims] A discharge lamp having two lead wires protruding in opposite directions from pinch seal portions located at both ends of a discharge space; There are two support supports each supporting the two lead wires of the discharge lamp separately, and a trough-like structure having a cylindrical portion at the base, protruding forward from the cylindrical portion, and having a closed front end. a shade in which a light-shielding portion is formed, the cylindrical portion surrounds the bases of the two support supports, and the base portion is coupled to the base body so that the light-shielding portion covers a part of the discharge lamp; A discharge lamp device comprising a filling synthetic resin that is filled in a space surrounded by a cylindrical portion and connects a shade and a base body.