JPH0569749U - Flat mirror mounting device for projector - Google Patents

Abstract

(57) [Summary] [Object] To provide a flat mirror mounting device which is small in deformation due to temperature change and is capable of mechanically providing flatness even at a constant temperature. A flat mirror 1, a hollow mirror mounting frame 2 composed of a peripheral portion 2a supporting the periphery of the flat mirror 1 and a central portion 2b supporting the center thereof, and a back surface 1 of the flat mirror 1
The joining member 3 joined to a, the feed screw mechanism 4 having one end attached to the joining member 3 and rotatably supported by the central portion 2b of the mirror attachment frame, and the peripheral portion 2 of the mirror attachment frame.
The cushioning member 5 is provided between the a and the plane mirror 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for mounting a large flat mirror compatible with a 100-inch class display compatible with high definition.

[0002]

[Prior Art]

 In the conventional installation of large plane mirrors for high-definition projectors, the mirrors were screwed on the Z-angle on the four sides directly to a frame-shaped structure made of aluminum drawn square pipe material. Figure 4 shows the layout of high-definition projectors and mirrors. Figure 3 shows the cross-sectional structure of the mirror mounting part. The arrangement of the mirror 31 and the Z angle 32 is shown.

[0003]

[Problems to be solved by the device]

 If the mirror mounting method having the above-described configuration is used, the glass mirror itself will be deformed due to the difference in the linear expansion coefficient of the material due to the temperature change. If the projector is adjusted in this state, the focus characteristics may deteriorate. Furthermore, the focus and convergence characteristics deteriorated with changes in the temperature of the projector installation environment. Furthermore, in the worst case, the mirror may break during transportation of the mirror when installing the projector system. At the time of breaking the mirror, it was presumed that a slight crack would occur at first and then mechanical vibration would cause brittle fracture.

Therefore, an object of the present invention is to provide a mirror mounting device which is small in deformation due to temperature change in a mounting method of a large flat mirror for a projector and which is capable of mechanically providing flatness even at a constant temperature. ..

[0005]

[Means for Solving the Problems]

 Therefore, in order to achieve the above object, the present invention provides a plane mirror, a hollow mirror mounting frame having a peripheral portion supporting the periphery of the plane mirror and a central portion supporting the center, and the plane mirror. Between the joining member joined to the back surface of the mirror, the feed screw mechanism with one end attached to the joining member and rotatably supported at the center of the mirror mounting frame, and between the peripheral portion of the mirror mounting frame and the flat mirror. And a cushioning member arranged.

[0006]

[Action]

 A hollow mirror mounting frame consisting of a peripheral part and a central part is provided, the rear surface of the mirror is bonded with a movable joint member with a screw, and it abuts on a feed screw mechanism mounted on the structure of the mirror mounting frame, It is configured to correct the deflection that accompanies conventional mirror mounting. For the adhesion between the back surface of the plane mirror and the joining member, a silicon-type epoxy adhesive that is stable in temperature and has adhesive strength is used. Deflection correction of the mirror is adjusted while checking the resolution of Surreen.

With the above-described configuration, the present invention makes it possible to maintain planarity by mechanically adjusting the rear surface of the mirror without using an expensive mirror that originally has good planarity. ..

[0008]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an exploded perspective view of the present invention. A side view is shown in FIG. The joining member 3 is arranged at the maximum position of the deflection of the plane mirror 1, and a feed screw mechanism (mechanical adjusting unit) 4 in which the joining member 3 is integrated with the mirror mounting frame 2 is provided. Further, in order to maintain good temperature characteristics, an impact member 5 is arranged around the mirror mounting frame 2 to reduce thermal and mechanical shocks such as felt and rubber. In this way, since the flat mirror 1 and the metal mirror mounting frame 2 do not come into direct contact with each other, no mechanical shock is applied to the flat mirror 1.

[0009]

[Effect of the device]

 As described above, the present invention maintains more flatness and has better temperature change characteristics when installing a mirror in a projector system compatible with a large screen compatible with high-definition. It is more economical for mirrors that have more expensive flatness.

[Brief description of drawings]

FIG. 1 shows a perspective view of the structure of the present invention.

FIG. 2 shows a side view of the arrangement of the present invention.

FIG. 3 shows a flexure of a conventional mirror mount.

FIG. 4 shows the position of a mirror in a rear projection type projector system.

[Explanation of symbols]

 1, 31 Plane mirror 1a Rear surface of plane mirror 2 Mirror mounting frame 2a Peripheral part 2b Central part 3 Joining member 4 Feed screw mechanism 4a Lock lever 5 Impact member 6 3 Tube projector 32 Z angle

Claims (1)

[Scope of utility model registration request] 1. A flat mirror, a hollow mirror mounting frame composed of a peripheral portion supporting the periphery of the flat mirror and a central portion supporting the center, a joining member joined to the back surface of the flat mirror, One end of the joining member is attached and a feed screw mechanism rotatably supported at the center of the mirror mounting frame, and a buffer member arranged between the peripheral portion of the mirror mounting frame and the flat mirror are provided. A characteristic flat mirror mounting device for projectors.