JPH09311382A - Projector device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately and easily adjust a swing angle to be given to a CRT. SOLUTION: The projector device is constituted of an adjusting screw 3 for adjusting the swing angle in a vertical direction, an adjusting screw 4 for adjusting the swing angle in a horizontal direction, inclined rings formed to a symmetrical shape to the center line of an opening, with two or more continuously formed inclined surface parts on one side so as to be inclined at a prescribed angle to both sides of the center line, and also which are rotated interlocking with the adjusting screws 3 and 4, ring supporting bosses 12a, 12c, 16b1 and 16b2 for supporting the inclined parts of the inclined rings and a ring spacer with which the inclined rings are engaged and also for assisting the rotation of the inclined rings. And the inclined rings are arranged so that one surface with no inclined surface part of one inclined ring may be placed opposite to one surface with no inclined surface part of the other ring across the ring spacer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector device having an adjusting mechanism for adjusting horizontal and vertical tilt angles using two tilt rings.

[0002]

2. Description of the Related Art A projection type projector using a cathode ray tube is a lens that forms an image forming optical system in front of three cathode ray tubes (CRT ... Cathode Ray Tube) corresponding to R, G and B colors. Blocks are arranged so that CRT images of respective colors are enlarged and projected and combined on a screen. FIG. 21 is a diagram schematically showing an example of such a projector device. FIG. 21 (a) shows an upper surface and FIG. 21 (b) shows a side surface. Lens block 33
R, 33G, and 33B are arranged in front of CRTs 34R, 34G, and 34B corresponding to R light, G light, and B light, respectively. In front of each lens block 33 (R, G, B), the image projected on the screen 35 is shown by a solid line.

As shown in FIG. 21A, the lens block 33 (R, G, B) is replaced by a CRT 34 (R,
G and B) are arranged parallel to each other, the R image and B projected by the lens blocks 33R and 33B.
The image focus planes FR and FB are not parallel to the screen 35. Similarly, as shown in FIG. 21B, the focus planes F (R, G, B) of the lens blocks 33 (R, G, B) are parallel to the screen 35 in the vertical direction. It's not something.

For this reason, the characteristics of the lens (when the distance from the light source to the lens is shortened, the distance from the lens to the image plane, that is, the projection distance becomes longer, and vice versa), for example, FIG. a) As shown in (b), the lens block 33 (R, G, B) and the CRT 3
4 (R, G, B) is given a predetermined tilt angle according to need, so that an image parallel to the screen 35 is projected.

FIG. 23 is a diagram schematically showing the distance from the light source to the lens and the distance from the lens to the focus surface. Rs is the light source, L is the lens, F is the focus surface a ₀ , a ₁ , a ₂ is a distance from the light source Rs to the lens L, and b ₀ , b ₁ and b ₂ are projection distances. As shown in the drawing, the images AB of the light source Rs are reversed on the projection surface of the lens L, and when the light source Rs and the focus surface F are parallel to each other, for example, as shown in FIG. become. 1 / a ₁ + 1 / b ₁ and 1 / a shown here
_{Since 2} + 1 / b ₂ is constant, when the light source Rs tilts, the focus plane F also tilts. That is, FIG.
As shown in (b), when the distance a ₁ becomes shorter than the distance a ₀ , the distance b ₁ becomes longer than the distance b ₀ , and the distance a ₂
Becomes longer than the distance a ₀ , the distance b ₂ becomes shorter than the distance b ₀ .

That is, by utilizing such lens characteristics, as shown in FIG.
3R and CRT34R, lens block 33B and CRT3
4B, the horizontal tilt angle θ, and as shown in FIG. 22B, the lens blocks 33 (R, G, B) and C.
By giving a tilt angle β in the vertical direction to each of the RTs 34 (R, G, B), the focus planes F (R, G, B) of the R, G, B images are projected in parallel with the screen 35. Will be able to.

By the way, the tilt angle as shown in FIGS. 22 (a) and 22 (b) is necessary because, for example, when the size of the screen 35 to be projected is changed, the lens magnification is usually changed accordingly, so that the projection distance is changed. The tilt angles θ and β are also changed. Therefore, by the method described below, the tilt angles θ and β can be arbitrarily set according to the installation condition of the projector apparatus and the like.

FIG. 24 is an exploded perspective view of a projector apparatus having a spacer type tilt angle adjusting mechanism used in, for example, an air coupling type optical system, and FIG.
FIG. 3 is an enlarged perspective view showing a tilt angle adjusting member used in this optical system. The tilt angle adjusting mechanism shown in FIG. 24 includes a lens spacer 40 holding a projection lens and a CR holding a CRT 34, which are not shown in this figure.
The tilt angle adjusting members 43, 47, 5 are provided between the T spacers 59.
By arranging 1 and 55 and screwing them, horizontal and vertical tilting angles can be given.

The screw hole portion 4 is provided at one end of each of the tilt angle adjusting members 43 and 47 arranged on the lens spacer 40 side.
4a, 44b, 44c, screw hole portions 48a, 48b, 48
c is formed. These screw hole portions 44 (a, b,
c) and the screw holes 48 (a, b, c) are CRT inch sizes (7) attached to the CRT spacer 59, respectively.
0 ", 120", 250 ", etc.) formed at different heights, and the screw receivers 41a, 42 of the lens spacer 40 are formed.
It is formed so that a fits. And screw receiver 4
The screws inserted in the screw holes 41N ₁ and 42N ₁ of the screws 1a and 42a are screw holes 44 (a, b, c) and screw holes 48.
The focal length can be adjusted by selecting and using any one of (a, b, c).

At the other end of the tilt angle adjusting member 43,
Corresponding to the screw hole portion 44 (a, b, c), for example, about ±
Inclined surfaces 46a, 46c with an inclination of about 0.2 °
Further, the flat surface 46b is formed at the other end of the tilt angle adjusting mechanism 47, and inclined surfaces 50a, 50c and a flat surface 50b corresponding to the screw hole portions 48 (a, b, c) are formed.

For example, when the screw receiver 41a contacts the screw hole 44a, the inclined surface 46a contacts the screw receiver 41b, and the screw receiver 41b contacts the screw hole 44b.
Is fitted, the flat surface 46b is attached to the screw receiver 41b.
Come into contact with each other. Similarly, for example, when the screw receiver 42a contacts the screw hole 48a, the inclined surface 50a contacts the screw receiver 42b, and when the screw receiver 42b is fitted in the screw hole 48b, the screw receiver 42b contacts the screw receiver 42b. Comes into contact with the flat surface 50b. The screw receiver 41
The screws N inserted through b and 42b are inserted into insertion portions 46d and 50d formed in the central portions of the inclined surface and the flat surface.

Screw hole portion 44 (a, b, c), screw hole portion 4
8 (a, b, c) is inserted into the screw hole portion 52 (a, b, c) of the tilt angle adjusting members 51, 55 arranged on the CRT spacer 59 side, and the screw hole 56.
CRT spacer 5 via any of (a, b, c)
9 of the threaded hole receiving 60a, screw holes 60N ₁ of 61a, 61
It is screwed into N ₁ .

The screw hole portion 5 is provided at one end of each of the tilt angle adjusting members 51 and 55 arranged on the lens spacer 59 side.
2a, 52b, 52c, screw hole portions 56a, 56b, 56
c is formed. Further, on the side facing the lens spacer 59 at this one end, the inclined surfaces 53a and 53c, the flat surface 53b, and the inclined surface 57 are provided around the screw holes.
a, 57c, and a flat surface 57b are formed.

On the side opposite to the lens spacer 59 at the other end of the tilt angle adjusting member 51, a screw hole portion 52 is provided.
The inclined surfaces 54a and 54c and the flat surface 54b corresponding to (a, b, c) and having an inclination of, for example, about ± 0.2 °, and the lens spacer 59 at the other end of the tilt angle adjusting mechanism 55. On the side facing the
The inclined surfaces 58a and 58c and the flat surface 58b corresponding to (a, b, c) are formed. In addition, the insertion portions 54d and 58d are provided in the central portions of these inclined surfaces and flat surfaces.
Is formed, and the screw N screwed into the screw receivers 60b and 61b passes through the insertion portions 54d and 58d.

For example, when the screw N is inserted into the screw hole 52a, the screw receiver 60a has a slope 53a and a screw receiver 60b.
When the screw N is inserted into the screw hole portion 52b, the inclined surface 54a comes into contact with the flat surface 53b of the screw receiver 60a and the flat surface 54 of the screw receiver 60b.
b comes into contact. Similarly, for example, the screw hole portion 56a
When the screw N is inserted into the screw receiver 61a, the slope 57
a, the inclined surface 58a comes into contact with the screw receiver 61b, and when the screw N is inserted into the screw hole portion 56b,
The screw receiver 61a has a flat surface 57b and a screw receiver 61b.
The flat surface 58b comes into contact with.

Thus, for example, by using the tilt angle adjusting members 43, 47, 51, 55 having a plurality of kinds of inclined surfaces, and selecting the inclined surface, the inclination angle of the inclined surface can be adjusted. You will be able to give a flapping angle.

FIG. 26 is a diagram showing a tilt angle adjusting mechanism using a spherical bearing mechanism. FIG. 26 (a) is a top view of the tilt angle adjusting mechanism, FIG. 26 (b) is a front view, and FIG. 26 (c) is a projection. FIG. 26 is a side view showing the lens 33 and the CRT 34 together.
(D) is sectional drawing. This spherical bearing mechanism is shown in FIG.
As shown in a sectional view in FIG. 6 (d), the contact surfaces of the lens spacer 63 and the CRT spacer 64 are constituted by spherical surfaces and combined, and are shown in FIGS. 26 (a) (b) (c). The vertical adjusting screw 66 and the horizontal adjusting screw 67 are opened and closed to give a tilt angle. The lens spacer 63 and the CRT spacer 64 are connected by a screw N via a pressing spring S, and a pressing fitting 69 provided inside the CRT spacer 64 stabilizes the combination.

The vertical adjusting screw 66 is inserted into the lens spacer 63 and connected to the CRT spacer 64. Then, by tightening (loosening) the vertical adjustment screw 66, C
The RT spacer 64 slides along the spherical surface so that the vertical interval V on the vertical adjustment screw 66 side becomes narrower (wider) and has an inclination, which is the vertical tilt angle.

The horizontal adjusting screw 67 is inserted into the lens spacer 63 and connected to the adjusting lever 65. The adjusting lever 65 is connected to the lens spacer 63 by the shaft 65a and the shaft 65.
It is connected to the CRT spacer 64 by b. When the horizontal adjustment screw 67 is tightened (loosened), the shaft 65b is pushed out around the shaft 65a as a fulcrum, and the horizontal interval H on the horizontal adjustment screw 67 side is widened (narrowed) to have an inclination. , This is the horizontal tilt angle. By providing the adjusting lever 65, the adjusting mechanism can be formed, for example, concentrated above the lens spacer 63, and the adjusting operability is improved.

In this way, the lens spacer 63 and the CRT are
By forming the joint surface of the spacer 64 with a spherical surface,
By sliding the spherical surface, it is possible to freely give horizontal and vertical tilt angles.

FIG. 27 is a perspective view showing a cross section of a part of the tilt angle adjusting mechanism by the biaxial mechanism. CRT spacer 7
A pair of bearing columns 70a and 70a are formed above and below the optical axis 0, respectively.
Bearing holes 70b and 70b are provided at the front end portion of 0a, respectively. The bellows 71 is, for example, a CRT spacer 70.
The upper and lower left and right points (two points in the figure) of the fixing ring 71a are fixed to the front surface of the CRT 34 by bolts B4, and are coupled to the CRT 34.

Horizontal rotary bearing holes 72a and 72a are provided in the upper and lower horizontal frames of the horizontal rotary frame 72, and vertical rotary bearing holes 72b and 72b are provided in the left and right of the vertical frame. The horizontal rotating frame 72 is C
The RT spacer 70 is positioned so as to be sandwiched between the bearing columns 70a, 70a of the RT spacer 70 from above and below.
The horizontal rotary shafts 73, 73 are inserted into the horizontal rotation bearing hole 72a and the horizontal rotation shaft 73b. As a result, the horizontal rotating frame 72 is held so as to be rotatable in the horizontal direction (indicated by the rotation center axis X) about the horizontal rotating shafts 73, 73.

Further, a rotation angle adjusting screw B is provided in a screw screwing hole 72c provided on the right side of the vertical frame on the upper side of the horizontal rotating frame 72.
₁ is screwed in, and the rotation angle adjusting screw B
The tip of the screw ₁ is brought into contact with the front surface of the CRT spacer 70. Accordingly, the rotation angle (horizontal tilt angle) of the horizontal rotation frame 72 can be adjusted by turning the rotation angle adjusting screw B ₁ .

The lens spacer 74 is provided with four bolt screw holes 74a (three bolt screw holes are shown in the drawing) for fixing the lens main body portion which is not shown in the drawing. , An L-shaped projection 74 is formed at the center of the upper end.
b (shown by the cross section) is formed, and this L-shaped projection 74 is formed.
Screw Nishigoana 74c of the rotational angle adjusting screw B ₂ is provided at the b. Further, vertical rotation bearing holes 74d and 74d are formed in the left and right central portions, respectively.

Further, the bellows 71 is a lens element 7.
5 and the CRT 34 are connected to each other, the lens spacer 74
Although not shown, it is attached to the rear surface portion of the CRT spacer 70 in the same state as being fixed to the CRT spacer 70. On this occasion,
A liquid having a refractive index almost equal to that of glass is injected into the bellows 71. As a result, the CRT 34 and the lens element 75 are optically coupled to each other and the CR
The effect of cooling the tube surface of T34 can also be obtained.

Then, the vertical rotation shafts 76, 76 are respectively inserted into the left and right vertical rotation bearing holes 74d of the lens spacer 74 and the vertical rotation bearing holes 72b of the horizontal rotation frame 72, so that the lens spacer 74 becomes horizontal. In the state of being positioned within the frame of the rotary frame 72, it is held rotatably in the vertical direction about the rotation center axis Y shown in the figure. Further to the rotation angle adjustment screw B ₂ in this state is inserted in a state screwed in the screw Nishigoana 74c of L-shaped projections 74b, the distal end portion of the rotational angle adjusting screw B ₂ is brought into contact with the front portion of the horizontal rotating frame 72 To be This allows the lens spacer 7 to be rotated by turning the rotation angle adjusting screw B _2.
The rotation angle of 4 (vertical tilt angle) can be adjusted.

FIG. 28 shows a tilt angle adjusting mechanism in which two tilt rings 85 and 86 are arranged between a lens spacer 82 and a CRT spacer 88 and a tilt angle is given by tilting these tilt rings. In addition, in this figure, the inclined rings 85 and 86 are shown with a part thereof cut away,
It is shown that a bellows 78 is arranged inside thereof. Further, on the upper surface of the CRT spacer 88, for example, C
Accumulators 89, 89 are provided for accumulating / discharging the load added by the weight of the RT 34 or the like. The lens spacer 82 and the CRT spacer 88 are connected by the screws N, N, N, N via the compression spring S, so that the lens spacer 82 and the CRT spacer 88 maintain a stable state even when a tilt angle is given by the inclined rings 85, 86. It is designed to be able to.

FIG. 29 is a diagram schematically showing a tilt angle given when the tilted rings 85 and 86 are rotated. For example, when the tilt ring 85 is rotated 180 ° from the state shown in FIG. 29 (a), the tilt angle θ ₁ can be given by the tilt of the tilt ring 85 as shown in FIG. 29 (b). . Further, when the tilt ring 86 is rotated, for example, 180 ° from the state shown in FIG. 29A, the tilt angle θ ₂ can be given by the tilt of the tilt ring 86 as shown in FIG. 29C. Become.

[0029]

However, in the adjusting mechanism shown in FIGS. 24 and 25, the tilt angle adjusting members 43, 47, 5 are provided between the CRT spacer 59 and the lens spacer 40.
The tilt can be given by a simple method of disposing 1, 55, but only the tilt angle formed in advance for each tilt angle adjusting member is given. Therefore, when giving a different tilt angle, the tilt angle adjusting member must be replaced, and the replacement work becomes complicated.

Further, the CRT spacer 64 shown in FIG.
In the adjusting mechanism in which the contact surfaces of the lens spacer 63 and the lens spacer 63 are spherical, when the pressing spring S is arranged between the CRT spacer 64 and the lens spacer 63, the pressing spring S needs to be crushed. A special jig for that is required. Further, it is difficult to understand what state the tilt angle is set to, and it is not easy to give a predetermined tilt angle before installing the projector device.

Further, in the gimbal mechanism shown in FIG. 27, in order to satisfy the reliability in transportation and the angle adjusting function, high precision is required in the connecting portion of each component, and as a result, the assembling work is specialized. . This will increase manufacturing costs and assembly costs.

Further, as shown in FIG. 28, in the adjusting mechanism using the two tilt rings 85 and 86, how much the tilt angle is given by the numerical values shown on the side surfaces of these tilt rings, for example. Although it is possible to immediately grasp whether or not the tilt angle does not change in the same plane, it is not possible to easily perform accurate fine adjustment.

Further, the two inclined rings 85 and 86 are
Since it is configured to rotate from the side of the adjustment mechanism,
When three color projectors corresponding to RGB colors are juxtaposed in one housing to form a color display device, there is a problem that adjustment operation is difficult to perform.

[0034]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it includes a cathode ray tube, a lens block forming an image forming optical system, and a space between the cathode ray tube and the lens block. In the projector device provided with a tilt angle adjusting mechanism for giving a predetermined tilt angle to the cathode ray tube, the tilt angle adjusting mechanism includes a first adjuster for adjusting a vertical tilt angle and a horizontal direction. A second adjuster for adjusting the tilt angle and a symmetrical shape with the center line of the opening as a boundary are formed, and at least two slopes having a predetermined angle are continuously formed on one surface on both sides of the center line. And the first and second inclined rings that rotate in conjunction with the first and second adjusters, and the inclined ring support portion that supports the inclined surface portions of the first and second inclined rings. , The first and second inclinations Is constituted by a ring spacer to assist the rotation with grayed is fitted, the first,
The second inclined ring constitutes the projector device by arranging the second inclined ring so as to face the other surface on which the inclined surface portion is not formed with the ring spacer interposed therebetween.

According to the present invention, the tilt angle is changed on the same plane by operating the adjusters corresponding to the vertical / horizontal directions to rotate the tilting ring, so that the fine adjustment is performed. Will be able to. Further, since the adjustment state of the tilt angle can be quantitatively grasped from the rotation angle of the adjuster, it is also suitable for rough adjustment. Further, since the vertical / horizontal tilt angle can be adjusted from the front, it is possible to easily perform the adjustment even after the projector device is arranged in the housing.

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a projector apparatus according to the present invention will be described below with reference to FIGS. 1 to 17 in the following order. << First Embodiment >><Structure> a. Configuration of the entire projector device b. Structure of lens spacer c. Structure of inclined ring d. Structure of ring spacer e. Structure of CRT spacer f. Structure of set color g. Structure of CRT holder h. Structure after assembly <Operation of tilt angle adjusting mechanism> i. Horizontal tilt angle j. Vertical tilt angle «Other embodiments» k. Structure of lens spacer and ring spacer l. Inclination of ring spacer

<< First Embodiment >><Structure> a. Structure of Projector Device FIG. 1 is a perspective view showing the outer appearance of the projector device of this embodiment. Projection lens L for projecting an image on a screen or the like
Are held by the lens holder 23 and fixed to the front surface of the lens spacer 2 with screws or the like. As will be described later, the lens spacer 2 has a substantially box-like shape having a peripheral wall formed therein, a tilt angle adjusting mechanism is arranged inside the lens spacer 2, and a CRT holder for holding the CRT 24 is provided via the tilt angle adjusting mechanism. Will be placed.

At the four corners of the lens spacer 2, there are provided screw holes through which screw members N having screw grooves are formed at both ends, and one end of the screw member N penetrating the screw holes has a CRT holder. Are screwed into the screw holes formed at the four corners of the. Further, the other end of the screw member N has a lens spacer 2
, And the nut NT is screwed in via the spring S and the washer W. Therefore, the elasticity of the spring S makes it possible to maintain the lens spacer 2 and the CRT holder in a stable state.

Further, on the front surface of the lens spacer 2, an adjustment screw 3 for adjusting a vertical tilt angle (hereinafter referred to as a tilt angle β) and an adjustment screw for adjusting a horizontal tilt angle (hereinafter referred to as a tilt angle θ) are adjusted. A screw 4 is rotatably provided therethrough. Gears (not shown) are provided at the tips of the adjusting screws 3 and 4, respectively. With this gear, a tilt ring described later can be rotated to adjust the tilt angle in each direction. .

When color display is performed using the projector device 1, three projector devices corresponding to the respective colors of RGB are arranged side by side to form a display device, but the adjusting screws 3 and 4 together form the projector device. By being provided on the front face of 1, the swing angle (β,
θ) can be adjusted. Further, by attaching a scale (numerical display or the like) M indicating the adjustment angle in the vicinity of the adjustment screws 3 and 4, the adjustment can be performed while watching the scale M.

FIG. 2A is an exploded perspective view of the main part of the projector device 1. The tilt angle adjusting mechanism used in the projector device of the present embodiment includes a lens spacer 2 that holds the lens holder 23, tilted rings 13 and 15, a ring spacer 14, a CRT spacer 16, and a set collar 1.
7 and a CRT holder 18 for holding the CRT 24. And the lens spacer 2 and the CRT
The holder 18 is connected via a nut NT, a washer W, a spring S, and a screw member N having threads on both ends.

Although not shown, the CRT holder 18 is formed with screw holes corresponding to the screw holes 6a, 6b, 6c, 6d of the lens spacer 2, and the screw member N is provided in each screw hole 6 (a, b). , C, d) and is screwed into the screw hole of the CRT holder 18. The elasticity of the spring S holds the lens spacer 2 and the CRT holder 18.

Between the lens spacer 2 and the CRT holder 18, there is an inclined surface 13 having a predetermined angle and an inclined ring 13 for adjusting the tilt angle β, and an inclined ring 1 for adjusting the tilt angle θ.
5 are arranged on the ring spacer 14 with a phase difference of 90 °. The ring spacer 14 is a cross-sectional view (A-
As shown in A), the inclined rings 13 and 15 are arranged on both sides of the flange portion, and the ring spacer 14
Is configured to assist the rotation operation of the tilt rings 13 and 15.

B. Structure of Lens Spacer An opening 5 through which an image output from the CRT 24 passes is formed on the back surface of the lens spacer 2, and the periphery of the opening 5 supports the tilted rings 13 and 15, and also a ring spacer 14 that assists the rotation and a tilt. A fitting wall 7 is formed on which a set collar 17 that holds the angle adjusting mechanism is arranged. The fitting wall 7 is formed so as to project in front of and behind the opening 5, and the grooves 8, 8, 8 ... Are alternately arranged on the rear side and the grooves 9, 9, 9, ... Are alternately arranged on the front side. Has been formed.

When the ring spacer 14 is arranged together with the inclined rings 13 and 15, the projections 14c, 14c and 14c formed on the inner circumference of the ring spacer 14 are provided with the grooves 8, 8, 8 ...
・ Mate into. This prevents the ring spacer 14 from rotating even when the tilted rings 13 and 15 are rotated. Therefore, it is possible to rotate only one of the tilt ring 13 and the tilt ring 15.

The gear 10 is formed at the tip of the adjusting screw 3 shown in FIG. 1 and is configured to rotate in accordance with the rotating operation of the adjusting screw 3. The gear 10 is arranged so that the teeth formed on the outer periphery of the gear 10 mesh with the teeth formed on the outer periphery of the inclined ring 13, and the inclined ring 13 rotates as the gear 10 rotates. Gear 1
1 is formed at the tip of the adjusting screw 4 and is configured to rotate in accordance with the rotating operation of the adjusting screw 4. This gear 1
1 has teeth formed on the outer periphery of the inclined ring 15
It is arranged so that it meshes with the teeth formed on the outer periphery of
The tilt ring 15 rotates as the gear 11 rotates. Therefore, as shown in the partial side view of the lens spacer 2 in FIG. 3, the gears 10 and 11 are arranged with a step corresponding to the height at which the inclined rings 13 and 15 are arranged, respectively.

A ring support boss 12 is provided around the opening 5.
(A, b, c, d) are provided so as to project, and are configured to come into contact with the inclined surface portion of the inclined ring 13. That is, the inclined ring 13 is supported at four points by the ring support bosses 12 (a, b, c, d). Then, when the tilt ring 13 is rotated by the adjusting screw 3, the tilt ring 13 is rotated.
The sloped surface of the ring shifts the portion that slides on and abuts the ring support boss 12 (a, b, c, d), and the tilt angle β can be given according to the shift.

C. Structure of Inclined Ring FIG. 4 is a perspective view of the inclined ring 13. FIG. 4A is a front view and FIG. 4B is a rear view. As shown in FIG. 4A, the inclined ring 13 has a symmetrical shape with a line passing through the center of the opening and connecting the valley 13a and the peak 13d as a boundary, and starts from the valley 13a. Slope 13b
Two types of slope portions are formed, namely ₁ and 13b ₂ and slope portions 13c ₁ and 13c ₂ formed toward the mountain portion 13d. Then, the mountain portion 13a and the slope portions 13c ₁ and 13c
The other end of the apex of _{2 and} the apex of the slopes 13b ₁ and 13b _{2 and} the peak 13d are formed at the same height. Therefore, each slope portion is formed with an equal slope, and the slope portion 1
3b ₁ and slope 13c ₁ , slope 13b ₂ and slope 13
c ₂ is always supported by the ring support member 12 at the same height position.

Further, in the present embodiment, the side surface of the inclined ring 13 is formed with teeth 13e over the circumference thereof, and the gear 10 provided on the lens spacer 2 as described above.
It is designed to rotate in mesh with each other. This tooth 13
It suffices that e is formed only in a portion that meshes with the gear 10 when the inclined ring 13 rotates, and may be formed only in a half circumference, for example. The rear side of the tilt ring 13 is shown in FIG.
As shown in (b), it is formed in a plane,
This back side is arranged on the flange portion of the ring spacer 14.

The inclined ring 15 shown in FIG.
Has a shape equivalent to that of the inclined ring 13, and includes valley portions 15a, slope portions 15b and 15b, and slope portions 15c and 15.
c, the peak portion 15d is the valley portion 13a, the slope portions 13b ₁ and 13b
₂ , the slope portions 13c ₁ and 13c ₂ , and the mountain portion 13d. Further, as described above, since the inclined ring 13 is arranged 90 degrees out of phase with the inclined ring 15, in the normal state where the tilt angle is not given, the inclined surface portions 13b ₁ and 15
c ₁ , slopes 13b ₂ and 15b ₁ , slopes 13c ₁ and 1
5c ₂ and the slope portions 13c ₂ and 15b ₂ are arranged so as to face each other.

As a result, when the inclined rings 13 and 15 are rotated by the gears 10 and 11, the crests 13a and the troughs 1 are formed.
3d, one side is high and the other side is low with the line connecting the peak portion 15a and the valley portion 15d as a boundary. As a result, for example, the tilting ring 13 can be provided with a tilt angle β, and the tilting ring 15 arranged with the tilting ring 13 being 90 ° out of phase with each other can be provided with a tilting angle θ. In the present embodiment, the inclined rings 13 and 15 will be described as an example in which two inclined surfaces are provided in a symmetrical shape with a valley connecting the center of the opening and a line connecting the peaks as boundaries.
You may make it provide two or more slope parts. In this case, ring support bosses are also formed according to the number of sloped portions.

As described above, the two inclined rings 13 and 15 having the inclined portions having a predetermined inclination are arranged with the phases thereof shifted by 90 °, and the inclined rings 13 and 15 are rotated to rotate the CRT 24. Against tilt angle (β, θ)
Will be able to give. The tilt ring 1
The operation of giving a tilt angle by 3 and 15 will be described later with reference to FIG.
It will be described in detail with reference to FIG.

D. Structure of Ring Spacer FIG. 5 is a view showing a ring spacer arranged between the inclined rings 13 and 15 to assist the rotation of each ring.
FIG. 5A is a front perspective view, and FIG. 5B is FIG.
FIG. 4 is a sectional view of BB shown in FIG. On the outer periphery of the ring portion 14a of the ring spacer 14, the inclined ring 13,
A flange portion 14b that supports 15 is formed, and further below the inner periphery of the ring portion 14a, projections 14c, 14c, 14c, which serve as a stopper mechanism for the ring spacer 14, are formed.
Is protruding.

When the inclined rings 13 and 15 are arranged above and below the flange holding portion 14b, respectively, the ring portion 14a fits inside the inclined rings 13 and 15 as shown in FIG. A stable rotation operation can be performed on the portion 14b. In this state, the ring spacer 14 is arranged on the lens spacer 2. In this case, by fitting the protrusion 14c into the groove 8, the ring spacer 14 itself is arranged so as not to rotate.
That is, even when the tilted ring 13 is rotated, the ring spacer 14 does not rotate with it,
The tilting rings 13, 15 can now be rotated completely independently.

FIG. 6 is a partial side view of the lens spacer 2 showing a state where the ring spacer 14 is fitted into the fitting wall 7, and the fitting wall 7 and the ring spacer 1 shown at both ends are shown.
4 is shown in cross section. The tilt rings 13 and 15 are not shown in this figure. As shown in FIG. 6A, by fitting the ring spacers 14 into the fitting walls 7 by fitting the protrusions 14c into the grooves 8, respectively.
The protrusions 14c serve as a stopper mechanism, and the inclined rings 13, 1
The ring spacer 14 itself does not rotate when 5 rotates. Furthermore, a tilt ring 1 not shown
When a tilt angle is given by rotating 3, 15, the protrusion 14c slides up or down in the groove 8 depending on the angle, as shown in FIG. 6 (b), for example. Therefore, the ring spacers 14 are also inclined together with the inclined rings 13 and 15.

E. Structure of CRT Spacer FIG. 7 is a view showing the CRT spacer 16 arranged between the CRT holder 18 and the inclined ring 15, and FIG. 7A is a perspective view showing the inclined ring 15 from the front side. 7 (b) is a sectional view taken along the line CC of FIG. 7 (a). In the CRT spacer 16, a flange-shaped CRT holder supporting portion 16a in which the CRT holder 18 is arranged is formed around the opening. The CRT holder supporting portion 16a is formed so as to fit into the fitted portion formed on the front surface of the CRT holder 18.

Further, the CRT holder support portion 16a includes
On the concentric circles of the opening, ring support bosses 16b ( ₁ , ₂ , ₃ , ₃ , which are formed according to the number of inclined surfaces of the inclined ring 15) are formed.
₄ ) is projected, and these ring support bosses 16b are provided.
Are formed so as to come into contact with the respective inclined surface portions of the inclined ring 15. The end portion 16c is formed to have a step with the CRT holder support portion 16a so as to face the locking portion of the set collar 17, as will be described later with reference to FIG. The CRT spacer 16 is prevented from coming off the lens spacer 2 during assembly by the contact between the end portion 16c and the locking portion. In addition, after assembly,
The elastic force of the spring S shown in FIG.

By disposing the CRT spacer 16 as described above, when the tilting ring 15 is rotated by the adjusting screw 4, the tilted surface of the tilting ring 15 is moved to the ring support boss 1.
6b ( ₁ , ₂ , ₃ , ₄ ) slides and abuts on the CRT 24 in accordance with the displacement.
Will be able to give.

F. Structure of Set Collar FIG. 8 is a view showing a set collar 17 for holding the inclined rings 13 and 15, the ring spacer 14, and the CRT spacer 16 described above by pressing them against the lens spacer 2.
8A is a front perspective view, and FIG. 8B is FIG. 8A.
FIG. 6 is a sectional view of DD shown in FIG.

The set collar 17 is formed in a ring shape, and the leg portions 17a, 17a, 17a ...
Is formed, and the projections 17b, 17b,
17b is formed. Further, a locking portion 17c is formed at the other end where the leg portion 17a is formed so as to correspond to the end portion 16c of the CRT spacer 16, and the inclined rings 13, 1 are formed.
5, the ring spacer 14 and the CRT spacer 16 are arranged on the lens spacer 2 and then press-fitted inside the fitting wall 7 and the protrusion 17b is fitted into the groove 9 so that the above-mentioned respective parts are separated from the lens spacer 2 during assembly. It is formed so as not to come off. In this case, the protrusion 17b is the lens spacer 2
Since it is slidably fitted in the groove 9 formed on the front side of the shaft, when the tilt angle β is given, it is inclined together with the ring spacer 14 shown in FIG. 6B.

When the tilt ring 15 is rotated to tilt the CRT spacer 16 to give the tilt angle θ,
As shown in the cross-sectional view of FIG. Figure 9 is a CRT
It is a figure which shows the fitting state of the spacer 16 and the set collar 17 sectionally. Note that FIG. 9A shows a state in which the tilt angle θ is not given, and FIG. 9B shows a state in which the tilt angle θ is given and the CRT spacer 16 is inclined according to the angle.

As shown in FIG. 9A, the CRT spacer 16 and the set collar 17 are arranged in parallel with each other when the tilt angle θ is not given. When the tilt ring 15 is rotated from this state to give a tilt angle θ, the set collar 17 is not displaced and only the CRT spacer 16 is tilted as shown in FIG. 9B.

H. Structure after Assembling FIG. 10 is a partial side view showing the state in which the above-mentioned components are assembled and the tilt angle is not enlarged, and FIG. 11 is a front view schematically showing the rotating operation of the gear 11 and the tilt ring 15. Is.
The CRT spacer 16 is not shown in FIG.
As shown, the gear 10 is a tooth 1 of a tilt ring 13.
The gear 11 meshes with the tooth 3e of the inclined ring 15
It is arranged so that it meshes with. Ring support bosses 12a and 12c are provided on the inclined surface of the inclined ring 13, and ring support bosses 16a ₁ and 16a are provided on the inclined surface of the inclined ring 15.
a ₃ comes into contact.

In this state, when the adjusting screw 3 is rotated, the tilt ring 13 is rotated. At this time, as shown in FIG. 11, since the projection 14c of the ring spacer 14 is fitted in the groove 8 of the lens spacer 2 so as not to rotate, the inclined ring 15 does not rotate. Further, when the adjusting screw 4 is rotated, the tilt ring 15 is rotated. Also in this case, since the ring spacer 14 does not rotate, only the inclined ring 15 rotates. Therefore, from the front of the lens spacer 2, the tilt angle (β, θ)
Can be adjusted independently.

<Operation of the tilt angle adjusting mechanism> i. Vertical tilt angle Next, an example of a case where the tilt angle β is given by rotating the tilt ring 13 will be described with reference to the schematic diagrams of FIGS. 12 to 14. FIG. 12 is a view showing the projector device 1 from the side, and the peripheral wall of the lens spacer 2 is not shown for convenience. Also, the adjusting screw 4 for adjusting the tilt angle θ
The gear 12 is not shown.

When the tilt angle β is not given, as shown in this figure, the center line C of the lens spacer 2 is
And the center of the CRT 24 are arranged so as to coincide with each other.
From this state, when the adjusting screw 3 is operated to operate the tilt ring 13 in the direction of the arrow U, the slopes of the tilt ring 13 rotate while sliding on the ring support bosses 12 (a, b, c, d). Come to do. Therefore, the thin portion of the inclined surface portion 13b ₂ (13c ₂ ) comes into contact with the ring support member 12a (12c), and the space above the lens spacer 2 and the CRT spacer 18 becomes narrow.

On the other hand, the ring support boss 12b (1
2d) comes into contact with the thick portion of the slope 13b ₁ (13c ₁ ). Therefore, the space below the lens spacer 2 and the CRT spacer 18 becomes wider. This makes it possible to give a tilt angle β ₁ in the vertical upward direction with respect to the illustrated center line C.

Further, as shown in FIG. 14, when the adjusting screw 3 is operated to rotate the inclined ring 13 in the direction of the arrow D, the ring support boss 12a (12c) is provided with a slope 13b ₂ (13c). The thick portion ₂ ) comes into contact with each other, so that the space above the lens spacer 2 and the CRT spacer 18 becomes wide. On the other hand, the ring support boss 12
The b (12d) comes into contact with the thin portion of the slope 13b ₁ (13c ₁ ). Therefore, the space above the lens spacer 2 and the CRT spacer 18 becomes narrow. Thereby, with respect to the center line C shown in the figure,
It becomes possible to give a tilt angle β ₂ downward in the vertical direction.

J. Horizontal tilt angle Next, an example in which the tilt angle θ is given by rotating the tilt ring 15 will be described with reference to the schematic diagrams of FIGS. 15 to 17. FIG. 15 is a diagram showing the projector device 1 from above, and the peripheral wall of the lens spacer 2 is not shown for convenience. In addition, FIG. 16 shows a tilt angle in the right direction, and FIG.
Reference numeral 7 shows a state in which a tilt angle in the left direction is given.

When the tilting ring 15 is rotated in the direction of arrow R by operating the adjusting screw 4, each tilted surface of the tilting ring 15 rotates while sliding on the ring support boss 16b ₁ . Therefore, the ring support boss 16b ₁ (16
b ₃ ), the thin portion of the slope 15 c ₁ (15 b ₁ ) comes into contact with the lens spacer 2 and the CRT.
The space on the right side of the spacer 18 is narrowed.

On the other hand, the ring support boss 16b ₂
The thick portion of the slope 15c ₂ (15b ₂ ) comes into contact with (16b ₄ ). Therefore, the distance between the lens spacer 2 and the CRT spacer 18 on the left side becomes wider. Thereby, with respect to the center line C shown in the figure,
The tilt angle θ ₁ can be given to the left.

Further, as shown in FIG. 17, when the adjusting screw 4 is operated to rotate the inclined ring 15 in the direction of the arrow L, the ring support boss 16b ₁ (16b ₃ ) is provided with an inclined surface portion 15c _1. The thick portion of (15b ₁ ) comes into contact, and the distance between the lens spacer 2 and the CRT spacer 18 on the right side becomes wider. On the other hand, the ring support boss 16b ₂ (16b ₄ ) has a slope 15c ₂ (15b
The thin part of ₂ ) comes into contact. Therefore, the distance between the lens spacer 2 and the CRT spacer 18 on the right side becomes narrow. This allows the centerline C shown
On the other hand, the tilt angle θ ₂ can be given to the right in the horizontal direction.

As described above with reference to FIGS. 12 to 17,
Adjustment screw 3 provided on the front surface of lens spacer 2,
By operating 4, the tilt rings 13 and 15 can be rotated, and the horizontal and vertical tilt angles can be adjusted respectively. In this case, since the ring spacer 14 arranged between the inclined rings 13 and 15 is fixed to the lens spacer 2 so as not to rotate, only one of the inclined rings (13 or 15) rotates. , It becomes possible to perform accurate adjustment in each of the vertical / horizontal directions.

Further, in the above-mentioned embodiment, the slant ring 13 has been described for adjusting in the vertical direction and the slant ring 15 for adjusting in the horizontal direction. However, by changing the arrangement direction of each ring,
It is also possible to use the tilt ring 13 arranged on the side of the lens spacer 2 for horizontal adjustment and the tilt ring 15 arranged on the side of the CRT spacer 18 for vertical adjustment.

<< Other Embodiments >> k. Structure of Lens Spacer and Ring Spacer Next, another embodiment of the present invention will be described with reference to FIGS. FIG. 18 is a perspective view showing a lens spacer 20 of another embodiment. The lens spacer 20 has the opening 5
The fitting wall 7a formed on the periphery of the opening is formed so as to project only to the front side, and the columns 21, 21, 21 ... Supporting the ring spacer described in FIG. . As a result, the fitting wall 7 has a plurality of grooves 9, 9, 9 ...
・ It becomes simpler than the structure that forms.

FIG. 19 is a perspective view of the ring spacer 22 arranged on the lens spacer 20. This ring spacer 22 has a ring spacer 14 on the outer periphery of the ring portion 22a.
Similarly, a flange portion 22b that supports the inclined rings 13 and 15 is formed. Further, this flange portion 22b
At the end of the, as a stopper mechanism of the ring spacer 22,
Grooves 22c, 22 corresponding to the columns 21 of the lens spacer 20
c, 22c ... Are formed. When the ring spacer 22 is arranged on the lens spacer 20, the grooves 22c are fitted into the columns 21, respectively, so that when the tilted rings 13 and 15 are rotated, the ring spacer 22 itself is caused by this operation. It will not rotate.

L. Inclining Operation of Ring Spacer FIG. 20 is a diagram schematically showing a state in which the groove 22c of the ring spacer 22 is fitted in the support column 21. As shown in FIG. 20 (a), when the column 21 is fitted into the groove 22 c and the ring spacer 22 is arranged on the lens spacer 20, the column 21 serves as a stopper mechanism, and when the tilted rings 13 and 15 rotate, the ring spacer 22. It will not rotate itself. Furthermore, a tilting ring 13, not shown,
When the tilt angle is given by rotating the shaft 15, for example, as shown in FIG. 20B, depending on the angle, the groove 22c moves upward or downward with the groove 22c fitted to the support column 21. By sliding, tilting ring 13,
The ring spacer 22 also becomes inclined with 15 (not shown).

In this way, the support 2 is attached to the lens spacer 20.
By forming 1, the structure around the opening 5 can be simplified and the shape of the inner circumference of the ring portion 22a of the ring spacer 22 can be simplified.

[0079]

As described above, according to the present invention, the vertical / vertical
By rotating the tilting ring by rotating the adjuster according to each horizontal direction, the tilt angle can be changed in the same plane, so that a stable adjusting operation can be obtained. Further, by finely adjusting the adjuster and the slant ring by a gear, it is possible to perform fine adjustment accurately and easily. Furthermore, since the adjustment state can be quantitatively grasped from the rotation angle of the adjuster, it is also suitable for rough adjustment. Further, there is an advantage that the angle adjusting mechanism can be configured with a smaller number of parts than the conventional one, and a manufacturing cost can be reduced because it is not necessary to use a special jig at the time of assembling.

[Brief description of drawings]

FIG. 1 is an external perspective view of a projector device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a main part of the projector device according to the embodiment.

FIG. 3 is an enlarged view showing the vicinity of a gear of a lens spacer.

FIG. 4 is a view showing a tilt ring of the embodiment.

FIG. 5 is a diagram showing a ring spacer of the embodiment.

6A and 6B are views for explaining the tilting operation of the ring spacer shown in FIG.

FIG. 7 is a diagram showing a CRT spacer according to an embodiment.

FIG. 8 is a diagram showing a set collar of the embodiment.

9A and 9B are views for explaining a tilting operation of the CRT spacer shown in FIG.

FIG. 10 is an enlarged view showing a tilt angle adjusting mechanism of the embodiment from a side surface.

FIG. 11 is a view showing a tilt angle adjusting mechanism of the embodiment from a square.

FIG. 12 is a plan view showing the projector device of the embodiment from the side.

FIG. 13 is a schematic diagram for giving a tilt angle β to the projector device of the embodiment.

FIG. 14 is a schematic diagram for giving a tilt angle β to the projector device of the embodiment.

FIG. 15 is a plan view showing the projector device of the embodiment from above.

FIG. 16 is a schematic diagram for giving a tilt angle θ to the projector device of the embodiment.

FIG. 17 is a schematic diagram for giving a tilt angle θ to the projector device of the embodiment.

FIG. 18 is a perspective view showing a lens spacer according to another embodiment of the present invention.

FIG. 19 is a view showing a ring spacer of another embodiment.

20 is a diagram for explaining the tilting operation of the ring spacer shown in FIG.

FIG. 21 is a diagram schematically showing focus on the screen of the projector device.

FIG. 22 is a diagram illustrating a tilt angle of the projector device.

FIG. 23 is a diagram schematically showing a distance of a focus surface according to lens characteristics.

FIG. 24 is a diagram illustrating a conventional spacer type tilt angle adjusting mechanism.

25 is an enlarged perspective view showing a spacer of the tilt angle adjusting mechanism shown in FIG. 24. FIG.

FIG. 26 is a diagram illustrating a tilt angle adjusting mechanism using a conventional spherical bearing.

FIG. 27 is a diagram illustrating a tilt angle adjusting mechanism using a conventional biaxial mechanism.

FIG. 28 is a diagram illustrating a tilt angle adjusting mechanism using a conventional tilt ring.

29 is a diagram schematically showing a tilt angle provided by the tilt ring shown in FIG. 28. FIG.

[Explanation of symbols]

2, 20 Lens spacer, 3, 4 Adjustment screw, 10,
11 gears, 12 (a, b, c, d), 16b ₁ , 1
6b ₂ , 16b ₃ , 16b ₄ ring support bosses, 13,
15 inclined ring, 13a, 15a valley part, 13d, 1
5d mountain part, 13b, 13c, 15b, 15c slope part, 14 ring spacer, 16 CRT spacer

Claims (5)

[Claims] 1. A cathode ray tube, a lens block forming an imaging optical system, and a tilt angle adjusting mechanism which is arranged between the cathode ray tube and the lens block and gives a predetermined tilt angle to the cathode ray tube. In the projector device, the tilt angle adjusting mechanism has a first adjuster that adjusts a vertical tilt angle, a second adjuster that adjusts a horizontal tilt angle, and a center line of the opening as a boundary. At least two slopes having a predetermined angle are continuously formed on both sides of the center line on one surface, and the one surface rotates in conjunction with the first and second adjusters. A second slant ring, a slant ring support portion that supports slant surface portions of the first and second slant rings, and the first and second slant rings are fitted and assist in rotation thereof. With the ring spacer, The projector device according to claim 1, wherein the first and second inclined rings are arranged such that the other surfaces of the first and second inclined rings on which the inclined surface portions are not formed face each other with the ring spacer interposed therebetween. 2. The projector device according to claim 1, wherein the first and second adjusters and the first and second inclined rings are configured to be interlocked with each other by gears. 3. The projector device according to claim 1, wherein the first and second adjusters are provided on a front surface of the projector device. 4. The projector device according to claim 1, wherein the tilted ring support portion is formed on a cathode ray tube spacer that holds the cathode ray tube and a lens spacer that supports the lens block. 5. The ring spacer is inclined together with the first and second inclined rings and is arranged so as not to rotate with respect to the cathode ray tube spacer or the lens spacer. The projector device according to claim 2.