JPH08163475A - Mount structure for lamp for image projection - Google Patents

Abstract

PURPOSE: To fix a metal halide lamp to a prescribed position by providing a modification section partially modified to a wire for fixing the metal halide lamp so as to allow the modification section to depress a surrounding part of a curved part of a parabolic mirror of the metal halide lamp. CONSTITUTION: A wire 3 is stretched to both side faces of a curved part at a rear side of a parabolic mirror 2 of a metal halide lamp 1 and folded parts 10, 11 or the like formed by partially folding the wire 3 in V shape are provided to at least four positions of the wire 3 and the metal halide lamp 1 is arranged so that the center of the parabolic mirror 2 is located to nearly the center where the folded parts 10, 11 or the like are arranged to suppress the surrounding of the curved part at a rear side of the parabolic mirror 2 almost uniformly. Furthermore, the wire 3 is arranged so that the tips of the folded parts 10, 11 are mutually directed inward to expand the part of suppressing the curved part on the rear side of the parabolic mirror 2 and to provide a spring effect thereby fixing the metal halide lamp 1 to a prescribed position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal projector, and more particularly to a mounting structure for an image projection lamp such as a metal halide lamp.

[0002]

2. Description of the Related Art A conventional metal halide lamp mounting structure for a liquid crystal projector is, as shown in FIG.
And 26 are arranged on one side surface of the metal halide lamp 1 and the central portion side is extended to the other side surface of the metal halide lamp 1 and a locking portion 27 is also provided on the central portion side.
As shown in (B), the locking portions 25 and 26 are locked to the locking tools 13 and 14 provided at two positions on one side plate of the housing 30, and the other side plate of the housing 30 is locked. The locking portion 27 is locked to the locking tool 12 provided, and the curved back surface of the parabolic mirror 2 of the metal halide lamp 1 is connected to the wire 23.
The metal halide lamp 1 is fixed to the housing 30 by pressing with.

[0003]

However, the back surface of the parabolic mirror 2 of the metal halide lamp 1 is a curved surface,
Further, since the surface of the wire 23 is also smooth, the fixing position of the wire 23 slips and deviates from the curved surface, so that the mounting position of the metal halide lamp 1 moves and it is difficult to fix it at a predetermined position, and the metal halide lamp 1 is fixed at a predetermined position. However, there was a problem that a fixing guide was required. The present invention provides a metal halide lamp in which a fixing wire for a metal halide lamp is provided with a partially deformed deforming portion, and the deforming portion presses and fixes around a curved portion of a parabolic mirror of the metal halide lamp. It is an object of the present invention to provide a mounting structure for an image projection lamp that can fix the lamp at a predetermined position.

[0004]

According to a first aspect of the present invention, a wire is passed from one side surface of a back surface of a parabolic mirror to the other side surface thereof and the curved portion of the back surface of the parabolic mirror is pressed by the wire. In the mounting portion of the image projection lamp of the liquid crystal projector that is fixed to the housing, a deformed portion that is partially deformed is provided at least at four positions of the wire, and the parabolic surface is formed at each of the deformed portions. The image projection lamp is fixed to the housing by pressing around the curved portion on the back surface of the mirror. The second invention of the present application is arranged such that the center of the parabolic mirror is located at a substantially central portion where each of the deforming portions is arranged, and the curvature of the back surface of the parabolic mirror is arranged at each of the deforming portions. It is characterized in that the lamp for image projection is fixed to the housing by pressing around the portion.

A third aspect of the present invention is characterized in that the deformable portion is formed by deforming the wire so that the distal ends of the deformable portion face inward. A fourth aspect of the present invention is characterized in that the deformable portion is formed by bending the wire into a substantially V shape. A fifth aspect of the present invention is characterized in that the deformable portion is formed by bending the wire into a substantially U shape.

[0006]

According to the present invention, the image projection lamp such as the metal halide lamp is fixed by the above-mentioned structure, and the wire provided to the curved portion of the back surface of the parabolic mirror of the metal halide lamp is partially provided at at least four positions. By disposing the deformed portions that are deformed in such a manner that the centers of the parabolic mirrors are located at the substantially central portions where these deformed portions are disposed, the circumference of the curved portion on the back surface of the parabolic mirror is The wire can be pressed almost evenly, and the shape of the deformed part
A parabolic mirror of a parabolic mirror is used by arranging so that the tips of these deformed portions face each other inward, using one formed by bending into a letter shape or one formed by bending a wire into a substantially U shape. Since it is possible to increase the spring effect while enlarging the portion that presses the curved portion on the back surface,
The pressing force on the curved portion on the back surface of the parabolic mirror is increased, and therefore, the metal halide lamp can be automatically placed and fixed at substantially the center of the deformed portion.

[0007]

1 is an enlarged perspective view showing a first embodiment of a mounting structure for an image projection lamp according to the present invention, and FIG. 2 is a first mounting structure for an image projection lamp according to the present invention. It is a top view showing an example. Examples will be described below with reference to FIGS. 1 and 2. The metal halide lamp 1 is arranged downward so that the emitted light is projected on a screen through a total reflection mirror, a liquid crystal panel, a projection lens and the like to display an image. The parabolic mirror 2 of the metal halide lamp 1 is used. The metal halide lamp 1 is attached to the housing 30 for fixing as shown in FIG.

In order to fix the metal halide lamp 1 by using one wire 3, both ends of the wire 3 are bent and locking portions 5 and 6 are provided and arranged on one side surface of the metal halide lamp 1, and the central portion side is also arranged. The metal halide lamp 1 is bent and provided with a locking portion 7, and the wire 3 is reciprocated by passing over the other side surface of the metal halide lamp 1, and the middle of the locking portion 5 and the locking portion 7 is bent into a dogleg shape to provide a bent portion 8. , Similarly, the locking portion 6 and the locking portion 7
The bent portion 9 is provided by bending the middle portion of the box into a substantially V shape, and the curved portion of the back surface of the parabolic mirror 2 is sandwiched from both sides.
With respect to the locking tools 13 and 14 provided on one side plate, the locking part 5 is engaged and fixed to the locking tool 13, and the locking part 6 is engaged and fixed to the locking tool 14. Then, the locking portion 7 is engaged with and fixed to the locking tool 12 provided on the other side plate of the housing 30. The fixed positions of the locking portions 5, 6 and the locking portion 7 are lower than the position of the contact portion between the wire 3 and the parabolic mirror 2.

Deformation portions obtained by partially deforming one of two portions of the reciprocating line of the wire 3, bending portions 10 and 11 formed by bending in a substantially V-shape in the same embodiment are provided, and the other portion of the reciprocating line is provided. Similarly, the bent portions 15 and 16 are also provided at two positions, and the center of the parabolic mirror 2 and the electrode portion 4 are located at the substantially central portion where the bent portions 10, 11, 15 and 16 are arranged. The bent portions 10, 11, 15 and 16 can evenly press the curved portion of the back surface of the parabolic mirror 2. Further, since the bent portions 10, 11, 15 and 16 are formed such that the tips bent in a substantially V shape are inside each other, the curved portion on the back surface of the parabolic mirror 2 is pressed. Since the portion can be enlarged and the spring effect can be provided, the pressing force against the curved portion of the back surface of the parabolic mirror 2 becomes strong, and therefore the metal halide lamp 1 is not bent by the bent portions 10, 11, 15 and 16. It is possible to automatically fix the device in the approximate center and fix it.

FIG. 3 is a plan view showing a second embodiment of the mounting structure of the image projection lamp of the present invention. In the figure, the same parts as those shown in FIG. 2 are designated by the same reference numerals. And the description is omitted. The difference from the embodiment of FIG. 2 is that the substantially V-shaped deformed portion provided on the wire is formed into a substantially U-shaped shape. As in FIG. 2, one of the two round trip lines of the wire 21
Deformation portions obtained by partially deforming the portions, in the embodiment, bending portions 17 and 18 formed by bending in a substantially U shape are provided, and the other two portions of the reciprocating line are similarly curved portions 19 and 20. Are arranged so that the center of the parabolic mirror 2 and the electrode portion 4 are located at the substantially central portion where the curved portions 17 to 20 are arranged, and the curved portions 17 to 20 are evenly arranged. The curved portion on the back surface of 2 can be pressed.

Further, since the curved portions 17 to 20 are formed such that the tips curved in a substantially U shape are inside each other, the portion that presses the curved portion on the back surface of the parabolic mirror 2 is pressed. Can be enlarged and a spring effect can be provided, so that the pressing force on the curved portion of the back surface of the parabolic mirror 2 becomes strong, and therefore the metal halide lamp 1 can be attached to each curved portion 17
It is possible to automatically place and fix it in the approximate center of the ˜20. In the above-described embodiment, the wire is partially deformed to provide a substantially V-shaped or U-shaped deformed portion, but another deformed portion, for example, a substantially U-shaped deformed portion is provided. Also good. Further, the number of deformed portions is increased or decreased to be arranged around the curved portion on the back surface of the parabolic mirror 2 in a well-balanced manner.
The metal halide lamp 1 may be fixed.

[0012]

As described above, according to the present invention,
The metal fixing wire for the metal halide lamp is partially bent or partially bent to be deformed, and at least four deformed portions are provided, and the deformed portion is deformed into a substantially V-shape or a substantially U-shape. The curved portions on the back surface of the parabolic mirror are arranged so that the curved portions on the back surface of the parabolic mirror can be pressed almost evenly by these deformed portions. The pressing part can be enlarged and a spring effect can be provided, so the pressing force on the curved part of the back surface of the parabolic mirror can be strengthened, and the metal halide lamp can be automatically placed in the approximate center of the deformed part. It becomes possible to fix it.

[Brief description of drawings]

FIG. 1 is an enlarged perspective view showing a first embodiment of a mounting structure for an image projection lamp according to the present invention.

FIG. 2 is a plan view showing the first embodiment of the mounting structure of the image projection lamp of the present invention.

FIG. 3 is a plan view showing a second embodiment of the mounting structure of the image projection lamp of the present invention.

FIG. 4 is an explanatory diagram showing a conventional mounting structure for an image projection lamp.

[Explanation of symbols]

 1 Metal Halide Lamp 2 Parabolic Mirror 3 Wire 4 Electrode Part 5 Locking Part 6 Locking Part 7 Locking Part 8 Bending Part 9 Bending Part 10 Bending Part 11 Bending Part 12 Locking Tool 13 Locking Tool 14 Locking tool 15 Bending section 16 Bending section 17 Bending section 18 Bending section 19 Bending section 20 Bending section

Claims (5)

[Claims] 1. A liquid crystal projector in which a wire is passed from one side surface of a back surface of a parabolic mirror to the other side surface thereof, and the curved portion of the back surface of the parabolic mirror is pressed by the wire to be fixed to a housing. In the mounting portion of the image projection lamp, at least four deformed portions of the wire are provided, and each of the deformed portions presses around the curved portion on the back surface of the parabolic mirror. Image projection lamp mounting structure, characterized in that the image projection lamp is fixed to the housing. 2. The parabolic mirror is arranged so that the center of the parabolic mirror is located at a substantially central portion where each of the deformable portions is arranged, and each of the deformable portions has a curved portion on the back surface of the parabolic mirror. 2. The mounting structure for an image projection lamp according to claim 1, wherein the image projection lamp is fixed to the housing by pressing the periphery. 3. The mounting structure for an image projection lamp according to claim 1, wherein the deformable portion is formed by deforming the wire so that the tips of the deformable portion face inward with respect to each other. . 4. The mounting structure for an image projection lamp according to claim 1, wherein the deformable portion is formed by bending the wire into a substantially V shape. 5. The mounting structure for an image projection lamp according to claim 1, wherein the deformable portion is formed by bending the wire into a substantially U shape.