JPH10148886A - Projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projector constituted so that an old light source and a new light source can be easily discriminated and the exchanging work of the light source is surely executed. SOLUTION: A stopper pin 6 constituted of a cylindrically shaped case 9 whose one end is opened, whose other end is closed and which is obtained by forming a pawl 15 on the inside wall of a tonguelike piece 14, a pin 7 obtained by forming a recessed part 11 which can be engaged with the pawl 15 and housed in the case 9 and a coil spring 8 whose one end is locked to the spring lock part of the case 9, whose other end is locked to the spring lock part 10a of the pin 7 and which presses the pin 7 in a direction that it projects from the aperture of the case 9 is integrated at a prescribed position in a lamp holder. Then, a lamp holder insertion port is provided with a dowel for releasing the engagement of the pawl 15 and the recessed part 11. Thus, the exchanging work of the light source can be surely executed and the light source used to the limit is prevented from being erroneously used again.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lamp holder for a projector device, and more particularly to a lamp holder for a projector device capable of reliably replacing a light source.

[0002]

2. Description of the Related Art Hitherto, as a projection type color image display device, a device called a liquid crystal projector device using a liquid crystal display panel has been developed. For example, a three-panel type liquid crystal projector device forms illumination light with a light source such as a metal halide lamp, decomposes this illumination light into red, green, and blue illumination light, and further converts these red, green, and blue illumination light. The light transmitted to each liquid crystal display panel driven by a color signal and transmitted through each liquid crystal display panel is synthesized, and then projected on a screen by a projection lens to form a color display image. Usually, the light source is held in a lamp holder, and the lamp holder is configured to be detachable from the apparatus main body.

By the way, in such a liquid crystal projector device, when the light source needs to be replaced for some reason such as a service life, the lamp holder is detached from the device body and the light source can be replaced integrally with the lamp holder. . In recent years, liquid crystal projector devices for general households have become widespread, and not only maintenance workers of manufacturers but also general users need to perform light source replacement work.

However, it is difficult for a general user to distinguish a new light source from an old light source that has reached the end of its life (that is, a new lamp holder and an old lamp holder). There is a possibility that a new light source to be mounted on the projector apparatus body may be erroneously mounted again on an old light source whose life has expired.
As described above, when the old light source whose life has expired is mounted again and used, the image displayed on the screen becomes dark, or a problem such as abnormal heating of the device occurs.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a projector device which can easily discriminate between an old light source and a new light source, and can reliably perform a light source replacement operation. It is in.

[0006]

In order to solve the above-mentioned problems, a projector device according to the present invention comprises a projector device having a detachable lamp holder at a lamp holder insertion opening formed in the projector device. A case in which one end is open and the other end is closed and has a cylindrical shape, and an engagement portion is formed on the inner wall, and an engaged portion engageable with the engagement portion is formed, and A pin to be housed and a biasing member having one end locked to the closed inner wall of the case, the other end locked to the end of the pin, and biasing the pin in a direction protruding from the opening of the case. And a releasing means for releasing the engagement between the engaging portion and the engaged portion at the lamp holder insertion opening.

According to the above projector device, once the lamp holder is inserted into the lamp holder insertion opening of the projector device, the release means of the lamp holder insertion opening releases the engagement between the stopper pin case and the pin, and the pin is released from the case. , The lamp holder used can be easily identified.

[0008]

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

FIG. 1 is a perspective view showing a liquid crystal projector and a lamp holder according to an embodiment of the present invention. The liquid crystal projector device includes a projection lens 2 on the front side of the housing 1.
Is mounted, and a lamp holder insertion opening 4 into which the lamp holder 3 is inserted is formed in the rear part of the housing 1. The lamp holder 3 is configured to be detachable from the lamp holder insertion opening 4 by means such as screws, and a light source 5 such as a metal halide lamp is provided in the lamp holder 3.
And a stopper pin 6 for determining whether the light source 5 is used or not, which is a feature of the present invention. The bottom and rear surfaces of the lamp holder 3 are provided with insertion holes (not shown) through which dowels 16 and pins 7 described later are inserted.

FIG. 2 is a view showing a stopper pin, FIG. 2 (a) is an exploded perspective view, FIG. 2 (b) is a front view thereof,
FIG. 3C is a sectional view taken along line AA in FIG. The stopper pin 6 includes a pin 7, a coil spring 8 as an urging member, and a case 9. The pin 7 has a substantially cylindrical shape, and at one end thereof, a spring locking portion 10a for locking one end of the coil spring 8 is formed, and a concave portion 11 is formed on the outer peripheral portion of the pin 7 at a position opposite to the concave portion 11. Has a rotation preventing projection 12 formed thereon. The case 9 has a substantially rectangular tube shape with one end opened and the other end closed, and a spring engagement portion 10b for engaging the other end of the coil spring 8 is formed on the closed inner wall. Also, 2
The slit 13 is opened, and an elastic tongue 14 having an extended upper surface is formed between the slits 13. The inner wall of the tongue 14 has a claw engageable with the recess 11 of the pin 7. 1
5 are formed. Further, a groove 16 for guiding the rotation preventing projection 12 of the pin 7 is formed on the lower surface.

The stopper pin 6 is assembled by inserting the coil spring 8 and the pin 7 into the case 9 in this order, and the pin 7 engages the recess 11 with the claw 15 formed on the tongue 14 of the case 9. It is fixed in the case 9. The stopper pin 6 assembled in this manner is assembled together with the light source 5 at a predetermined position in the lamp holder 3, for example, at a rear portion.

Next, the operation of the liquid crystal projector when the light source is replaced will be described with reference to FIG. 3A and 3B are schematic cross-sectional views for explaining the operation of the liquid crystal projector when the light source is replaced. FIG. 3A is a schematic cross-sectional view showing a state where a new light source is inserted into the liquid crystal projector, and FIG. FIG. 4 is a schematic sectional view showing a state where the light source once inserted is taken out. A dowel 17 is formed on the bottom surface of the lamp holder insertion opening 4 of the liquid crystal projector at a position where the tongue-shaped piece 14 of the stopper pin 6 incorporated in the lamp holder 3 faces.

First, when inserting a new light source, FIG.
As shown in (a), when the lamp holder 3 is inserted into the lamp holder insertion slot 4 of the liquid crystal projector device, the dowel 17
As a result, the tongue-shaped piece 14 of the case 9 of the stopper pin 6 is pushed upward, the engagement between the claw 15 and the concave portion 11 of the pin 7 is released, and the urging force of the coil spring 8 causes the pin 7 to move to the opening of the case 9 and the lamp holder. Try to protrude from 3,
It is restricted by the housing 1 of the liquid crystal projector and remains in the case 9. When the life of the light source 5 requires replacement, the light source 5 is replaced together with the lamp holder 3.
As shown in FIG. 3B, when the lamp holder 3 is taken out from the lamp holder insertion slot 4, the pins 7 of the stopper pins 6 are removed.
Project from the lamp holder 3. Therefore, since the old light source that has been used once has the pin 7 protruding, if a general user or a maintenance worker attempts to insert the old light source into the lamp holder insertion port 4 by mistake, the pin 7 is moved to the liquid crystal projector. It cannot be inserted because it interferes with the housing 1 of the device, and reuse of an old light source can be prevented.

At the time of manufacturing or repairing the liquid crystal projector device, it is conceivable that a new light source or a light source whose life has not expired is once taken out and the light source is inserted into the lamp holder insertion port 4 again. To case 9
This can be dealt with by inserting the lamp holder 3 into the lamp holder insertion opening 4 of the liquid crystal projector device after pushing the inside into the concave portion 11 and engaging the claw 15.

The present invention is not limited to the above embodiment. For example, the coil spring 8 has been described as an urging member for urging the pin 7 of the stopper pin 6, but has the same function. Other biasing members may be used. Also,
Contrary to the stopper pin 6 of the above embodiment, a concave portion may be provided on the tongue-shaped piece 14 side of the case 9, and a claw engageable with the concave portion may be provided on the pin 7 side. Furthermore, although the present invention has been described as applied to a three-panel type liquid crystal projector, the present invention can also be applied to other projectors such as a single-panel type liquid crystal projector and a general optical device using a lamp holder. it can.

[0016]

According to the present invention, the light source that has reached the end of its life can be easily identified, so that the work of replacing the light source can be performed reliably, and the light source that has reached its end of life can be erroneously reused. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a liquid crystal projector device and a lamp holder according to an embodiment of the present invention.

2A and 2B are views showing a stopper pin, wherein FIG. 2A is an exploded perspective view, FIG. 2B is a front view, and FIG. 2C is a cross-sectional view taken along line AA of FIG.

FIG. 3 is a schematic cross-sectional view for explaining the operation of the liquid crystal projector device at the time of light source replacement.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Housing, 2 ... Projection lens, 3 ... Lamp holder, 4 ... Lamp holder insertion opening, 5 ... Light source, 6 ... Stopper pin, 7
... Pin, 8 ... Coil spring, 9 ... Case, 10a, 10b
... Spring retaining part, 11 ... Recess, 12 ... Protrusion for rotation prevention, 1
3 ... slit, 14 ... tongue, 15 ... nail, 16 ... groove, 1
7 ... Dowel

Claims (1)

[Claims] 1. A projector device having a detachable lamp holder in a lamp holder insertion opening formed in the projector device, wherein the lamp holder has a cylindrical shape with one end opened and the other end closed. A case in which an engaging portion is formed on the inner wall, a engaged portion engageable with the engaging portion is formed, and a pin housed in the case; one end is locked to a closed inner wall of the case And a biasing member having the other end locked to the end of the pin and biasing the pin in a direction projecting from the opening of the case. A projector device, comprising: a release unit for releasing the engagement between the engaging portion and the engaged portion in the insertion opening.