JP2017068180A - Projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projector capable of tilting in an inverted installation state ensuring satisfactory appearance in an ordinal installation state.SOLUTION: The projector includes: a light source; an upper jacket for storing the light source; a lower jacket for storing the light source; and a tilting means. The upper jacket is formed with a concave for storing the tilting means and is provided with a cover member for covering the tilting means.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a projector, and more particularly to a tilt adjustment leg of the projector.

  Conventionally, when using a projector for home use, there is a case where a projection distance from the projector to the screen cannot be sufficiently secured because furniture such as a bookshelf is provided on the wall facing the screen.

  Therefore, a method is conceivable in which the projector is used by being turned upside down and placed on the furniture at a position facing the screen in a reverse stationary state in which the tilt direction is downward.

  Patent Document 1 discloses a configuration in which a protrusion is provided on the upper surface portion of the outer case so that a switch on the operation panel provided on the outer case is not erroneously operated when used in an inverted position.

JP 2004-85726 A

  However, the conventional technique disclosed in Patent Document 1 described above has a configuration in which a projection is provided on the upper side of the exterior, and thus cannot project the projection image of the projector.

  In general, a soft material such as rubber is used for the protrusion on the upper surface of the projector so that the surface on which the projector is installed is not damaged.

  However, dust adheres greatly to the protrusions on the upper surface part depending on the use environment. Therefore, if the protrusions are exposed when used in a stationary state, the aesthetic appearance may be impaired.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a projector that can be kept in a reversed stationary state and does not impair the appearance of the upper case when in a normal stationary state.

In order to achieve the above object, a projector according to the present invention provides:
A projector having a light source, an upper exterior for housing the light source, a lower exterior for housing the light source, and a tilting means, and covering the recess and the tilting means for housing the tilting means A cover member is provided on the upper exterior.

  According to the present invention, it is possible to provide a projector that can be kept in a reversed stationary state and does not impair the appearance of the outer case when in a normal stationary state.

The figure which shows the inside of the projector in the 1st Embodiment of this invention 1 is an external view of a projector according to a first embodiment of the present invention. The disassembled perspective view of the adjustment leg unit in the 1st Embodiment of this invention Sectional drawing at the time of the adjustment leg unit in the 1st Embodiment of this invention being accommodated External view of the projector in the 2nd Embodiment of this invention Sectional drawing at the time of the adjustment leg unit in the 2nd Embodiment of this invention being accommodated

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a diagram showing the inside of the projector according to the first embodiment of the present invention.

  Reference numeral 1 denotes a lamp as a light source. Reference numeral 2 denotes a lamp holder that holds the lamp 1 and an explosion-proof convex lens 3 described later by a plurality of spring members (not shown). Reference numeral 3 denotes an explosion-proof convex lens having a function of condensing light from the lamp 1. Reference numeral 4 denotes a lamp unit including the lamp 1, the lamp holder 2, the explosion-proof convex lens 3, and a plurality of members (not shown). α denotes an illumination optical system that receives light from the lamp 1. Reference numeral β denotes a color separation / synthesis optical system including a liquid crystal panel for three colors R, G, and B on which light emitted from the illumination optical system is incident.

  Reference numeral 5 denotes a projection lens unit for projecting an image onto a screen (projected surface) (not shown) by receiving the light emitted from the color separation / synthesis optical system β. The projection lens unit 5 includes a projection lens optical system to be described later. Stored. Reference numeral 6 denotes an optical box that houses the lamp unit 4, the illumination optical system α, and the color separation / synthesis optical system β and to which the projection lens unit 5 is fixed. Reference numeral 7 denotes a power source. The power source 7 has an AC inlet (not shown), is incorporated in an outer case 17 described later, and is electrically connected to the power source 7 to supply power to the housing. Reference numeral 8 denotes a ballast, which is a lighting power supply device for lighting the lamp 1. The ballast 8 is electrically connected to the power source 7 and the lamp 1. Reference numeral 9 denotes an optical cooling fan A that cools the optical element of the color separation / synthesis system β by exhausting air that has taken in outside air from an air inlet 17a provided in an outer case 17 to be described later.

  Reference numeral 10 denotes an optical cooling fan B that cools the optical element of the color separation / synthesis system β by exhausting air that has taken in outside air from an air inlet 17a provided in an outer case 17 described later. Reference numeral 11 denotes an optical cooling fan intake duct that holds the optical cooling fan A9 and the optical cooling fan B10, sucks outside air from an air inlet 17a described later, and guides the air to the air inlets of the optical cooling fan A9 and the optical cooling fan B10. Reference numeral 13 denotes an exhaust fan, which cools the power supply 8 and the ballast 9 with air sucked by the exhaust fan 13, cools the lamp 1 and its surroundings with exhaust, and exhausts heat outside the housing through an exhaust port 17b described later. An exhaust fan holder 14 holds the exhaust fan 13.

  Reference numeral 15 denotes a lamp cooling fan. The lamp cooling fan 15 draws in air that has cooled the optical element of the color separation / synthesis system β and cools the lamp 1 by exhaust. A lamp cooling duct 16 guides the air exhausted from the lamp cooling fan 15. Reference numeral 17 denotes an outer case, which includes a front intake port 17a for taking outside air into the casing, a side intake port 17b, and an exhaust port 17c for exhausting heat outside the casing. Reference numeral 18 denotes an air filter that suppresses dust from entering the casing when the outside air is sucked into the mounting casing in the vicinity of the intake port 17a.

  19 is equipped with a connector (interface) that captures various signals such as images and controls, and sends the driving of the liquid crystal panel, the lighting command to the lamp 1, and the driving commands to a plurality of fans by the power from the power source 7 described above. This is a drive / control board unit mainly used. The drive / control board unit 19 is connected to an FPC coming out of a liquid crystal panel arranged in the color separation / synthesis optical system β.

  Reference numeral 20 denotes a polarization conversion element cooling fan that cools a polarization conversion element 45 (to be described later) by exhausting air after intake from the side air inlet 18b. The polarization conversion element cooling fan 20 is a sirocco fan. A polarization conversion element cooling duct 21 guides air exhausted from the polarization conversion element cooling fan 20.

  FIG. 2 is a diagram showing the appearance of the projector according to the first embodiment of the present invention.

  Reference numeral 22 denotes an exterior lower case that protects the interior of the projector by being combined with the exterior upper case 17. A cover 23 is provided at the four corners of the exterior upper case 17 to cover and hide the recesses for accommodating the adjusting leg units described later.

  FIG. 3 is an exploded perspective view of the adjusting leg unit in the first embodiment of the present invention.

  Reference numeral 24 denotes a foot having an installation surface when the projector is installed. The surface opposite to the installation surface is a double-sided tape and is attached to the dial 26. Reference numeral 25 denotes a screw shaft for adjusting the tilt of the projected image. A dial 26 is operated by the user to adjust the tilt of the projected image. The outer appearance is knurled so that the user can easily pick it. Reference numeral 27 denotes a nut for fastening the screw shaft 25 to the dial 26.

  FIG. 4 is a cross-sectional view showing a state in which the adjusting leg unit is housed in the first embodiment of the present invention.

  FIG. 3 is a cross-sectional view taken along the line A-A ′ of FIG. 2 and shows one of four adjustment legs, but the remaining three places have the same configuration. 17a of the outer case 17 is a recess for accommodating the adjusting leg unit. Reference numeral 17b denotes a screw portion provided to advance and retract the screw shaft 25. Reference numeral 17c denotes a protrusion provided on the outer case. 23a of the cover 23 is a claw portion that is elastically deformed by a projection 17c provided on the outer case. By applying a force from the outside to the cover 23, the claw portion 23a is detached from the projection 17c of the cover 17, so that the cover 23 can be removed. By removing the cover 23, the exposed adjustment leg unit can be projected at a desired angle. Further, by attaching the cover 23 at the time of standing, since the rubber 24 of the adjusting leg unit is not exposed, it is possible to avoid deteriorating the aesthetic appearance.

  On the other hand, 22a of the exterior lower case is a screw portion provided to advance and retract the screw shaft 25 of the adjusting leg unit. The adjustment leg unit is always exposed to the lower outer case 22.

  Hereinafter, a second embodiment of the present invention will be described with reference to FIGS.

  FIG. 5 is an external view of a projector according to the second embodiment of the present invention.

  A cover 32 is provided at the four corners of the outer upper case 17 to cover the recesses for accommodating the adjusting leg units described later. 32a of the cover 32 is a rib for the user to pick. The rib 32a can be picked and slid in the direction indicated by the arrow B. By sliding inward, the adjusting leg unit is exposed, and the tilt of the projected image can be adjusted.

  FIG. 6 is a cross-sectional view showing a state in which the adjusting leg according to the second embodiment of the present invention is housed.

  FIG. 6 is a cross-sectional view taken along the line C-C ′ of FIG. 5 and shows one of the four adjustment legs, but the remaining three places have the same configuration. 31a of the outer case 31 is a recess for accommodating the adjusting leg unit. Reference numeral 31b denotes a screw portion provided to advance and retract the screw shaft 25. 31 c is a groove for sliding the cover 32. When the cover 32 is accommodated in the groove, the rib forming the groove serves as a guide, so that the cover 32 can slide. Even in this configuration, the cover 32 can be adjusted so that the rubber 24 of the adjusting leg unit is not exposed, so that it is possible to avoid deteriorating the aesthetic appearance. In the configuration of the second embodiment, the cover 32 does not need to be attached to and detached from the upper case 31, so there is no risk of the cover being lost.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

17 exterior upper case, 17a recess, 17b screw part, 17c protrusion,
22 exterior lower case, 22a screw part, 23 cover, 23a claw part, 24 installation foot,
25 Screw shaft, 26 dial, 27 nut

Claims (3)

A light source;
An upper exterior for housing the light source;
A lower exterior for housing the light source;
In projectors equipped with tilting means,
A projector characterized in that a recess for accommodating the tilting means and a cover member for covering the tilting means are provided on the upper exterior. The projector according to claim 1, wherein a claw shape is provided on the cover member, and a protrusion for elastically deforming the claw shape of the cover member is provided on the upper exterior. The projector according to claim 1, wherein the cover member slides with respect to the upper exterior.