JP4847064B2 - Position / angle adjustment device - Google Patents

Description

  The present invention relates to a position / angle adjustment device that adjusts the projection position of a projector that projects an image on a screen.

  2. Description of the Related Art A projection display device that enlarges an image of a liquid crystal display device or the like with a lens and projects it on a screen is known. For example, Patent Document 1 discloses that a projection lens and a reflective optical member are integrally formed in a projection display device that enlarges an image from a video projection device with a projection lens and reflects the enlarged image on a screen by reflecting it with a mirror. Thus, it is described that the apparatus is miniaturized.

  When manufacturing a projection display device, the projected position of the image is shifted from the center of the screen due to dimensional errors of the parts used, projector assembly errors, mounting position errors, screen assembly errors, or reflector assembly errors. It may shift. Therefore, an adjustment device that adjusts the projection position of the image of the projector is required.

As an adjusting device for adjusting the position of the projector, for example, an apparatus having a structure shown in FIGS. 9A and 9B is known.
FIG. 9A is an external view of a conventional angle adjustment device 101 used in a projection display device.

  The angle adjusting device 101 has a structure in which a turntable 103 is rotatably supported on a fixed table 102, and an adjustment knob 104 is adjusted to rotate the turntable 102 clockwise or counterclockwise by a predetermined angle. Have

FIG. 9B is a diagram showing the structure of another angle adjusting device. The movable body 111 on which the projector is placed is structured to be rotatable about the rotation shaft 112, and an arc-shaped long hole 113 centered on the rotation shaft 112 is provided. Then, the moving body 111 is moved along the long hole 113, for example, moved to the position of 111a, and then the moving body 111 is fixed by the screw 114.
Japanese Patent Laid-Open No. 11-72846

However, the angle adjusting device using the turntable requires a part such as a bearing in the bearing portion that supports the turntable, and there is a problem that the cost of the parts increases.
In addition, although the manufacturing cost of the structure with an arc-shaped elongated hole is reduced, the adjustment accuracy is adjusted because the position of the moving body is displaced by the tightening force of the screw when the screw is fixed after adjusting the position of the moving body. There was a problem that was low.

  An object of the present invention is to provide a position / angle adjusting device that can accurately adjust the projection position of the image of the projector and that is low in manufacturing cost.

  The position / angle adjustment device of the present invention includes an X-axis adjustment unit that adjusts the position of the first movable unit in the X-axis direction, and an X-axis angle adjustment that adjusts an angle about the X axis of the first movable unit. An X-axis adjusting mechanism having a portion, a Y-axis adjusting portion for adjusting a position of the second movable portion in the Y-axis direction, and a Y-axis angle for adjusting an angle around the Y axis of the second movable portion A Y-axis adjustment mechanism having an adjustment unit; a Z-axis adjustment unit that adjusts a position of the third movable unit in the Z-axis direction; and a Z-axis that adjusts an angle about the Z axis of the third movable unit. A Z-axis adjustment mechanism having an angle adjustment unit is integrally configured.

  According to the present invention, an X-axis adjustment mechanism that adjusts the position in the X-axis direction and the angle around the X-axis, a Y-axis adjustment mechanism that adjusts the position in the Y-axis direction and the angle around the Y-axis, Since the position / angle adjusting device is configured by three Z-axis adjusting mechanisms that adjust the position in the Z-axis direction and the angle around the Z-axis, the overall structure is simplified. Thereby, a position / angle adjusting device with high adjustment accuracy can be realized at a low manufacturing cost.

  In the position / angle adjustment device of the present invention, the X-axis adjustment unit and the X-axis angle adjustment unit of the X-axis adjustment mechanism include a main body unit to which first and second shafts extending in the X-axis direction are attached; Alternatively, the first movable portion that is rotatably supported by the second shaft and has a third shaft that extends in the X-axis direction, and the first movable portion that adjusts the position of the first movable portion in the X-axis direction. The first and second elongated holes into which the first and second shafts are inserted, and the third shaft is inserted with respect to the longitudinal direction of the first and second elongated holes. A guide portion having a third elongated hole whose longitudinal direction has a predetermined inclination; a second adjustment screw for adjusting an angle of the first movable portion; and the guide by the second adjustment screw. Moving the portion in a direction perpendicular to the X axis, and moving the third axis of the first movable portion along the third elongated hole of the guide portion. Said first movable portion by causing movement by rotating about the X axis to adjust the angle.

  With this configuration, the third axis of the first movable part is moved along the third long hole of the guide part by rotating the second adjustment screw clockwise or counterclockwise. Thus, the first movable part can be rotated by a predetermined angle about the X axis. Thereby, the angle around the X axis of the first movable part can be adjusted.

In the position / angle adjustment device of the present invention, the first adjustment screw of the X-axis adjustment mechanism is connected to the first movable part, and adjusts the position of the first movable part in the X-axis direction.
With this configuration, the position of the first movable portion in the X-axis direction can be adjusted by adjusting the first adjustment screw.

  In the position / angle adjustment device of the present invention, the first adjustment screw for adjusting the position in the X-axis direction is connected to the first movable portion, and an angle with respect to the X axis is set by the second adjustment screw. The first adjustment screw is movably attached to the main body so that the first movable part can rotate during adjustment.

With this configuration, when the angle is adjusted by adjusting the second adjustment screw, the first movable portion connected to the first adjustment screw can be freely moved.
In the position / angle adjustment device of the present invention, the Y-axis adjustment unit and the Y-axis angle adjustment unit of the Y-axis adjustment mechanism include a second main body unit to which fourth and fifth axes extending in the Y-axis direction are attached, A second movable part that is rotatably supported by the fourth or fifth axis and has a sixth axis that extends in the Y-axis direction, and a position of the second movable part in the Y-axis direction are adjusted. A fourth adjustment screw, fourth and fifth elongated holes into which the fourth and fifth shafts are inserted, and a longitudinal direction of the fourth and fifth elongated holes into which the sixth shaft is inserted A fourth guide screw having a sixth elongated hole whose longitudinal direction has a predetermined inclination, and a fourth adjustment screw for adjusting the angle of the second movable portion, and the fourth adjustment screw. To move the second guide portion in a direction perpendicular to the Y-axis, and move the second guide portion along the sixth elongated hole of the second guide portion. Said second movable portion by moving the sixth axis of the turning part is rotated about the Y axis to adjust the angle.

  With this configuration, the sixth axis of the second movable portion is moved along the sixth elongated hole of the second guide portion by rotating the fourth adjustment screw clockwise or counterclockwise. Thus, the second movable part can be rotated by a predetermined angle around the Y axis. Thereby, the angle around the Y axis of the second movable part can be adjusted.

  In the position / angle adjustment device of the present invention, the Z-axis adjustment portion and the Z-axis angle adjustment portion of the Z-axis adjustment mechanism include a third main body portion to which seventh and eighth shafts extending in the Z-axis direction are attached, A third movable portion that is rotatably supported by the seventh or eighth shaft and attached with a ninth shaft extending in the Z-axis direction, and adjusts the position of the third movable portion in the Z-axis direction. A fifth adjusting screw, seventh and eighth elongated holes into which the seventh and eighth shafts are inserted, and a longitudinal direction of the seventh and eighth elongated holes into which the ninth shaft is inserted A third guide portion having a ninth elongated hole whose longitudinal direction has a predetermined inclination, and a sixth adjustment screw for adjusting the angle of the third movable portion, and the sixth adjustment The third guide portion is moved in a direction orthogonal to the Z axis by a screw, and the third guide portion is moved along the ninth elongated hole of the third guide portion. The third movable portion is rotated about the Z axis by moving the ninth shaft of the movable portion for adjusting the angle.

  With this configuration, the ninth axis of the third movable portion is moved along the ninth elongated hole of the third guide portion by rotating the sixth adjustment screw clockwise or counterclockwise. Thereby, the third movable part can be rotated by a predetermined angle around the Z axis. Thereby, the angle around the Z-axis of the third movable part can be adjusted.

  According to the present invention, three or more two or more two-axis adjustment mechanisms for adjusting the position in the axial direction and the angle around the axis are combined, so that the manufacturing cost is low, and the position / angle adjustment with high adjustment accuracy is achieved. A device can be realized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external view of the display device 11. In the display device 11 of FIG. 1, projection type display devices 12 are vertically stacked in two stages to form one display device 11.

  Inside the projection type display device 12, a projector 13 and a reflecting mirror 14 are provided. Although not shown in FIG. 1, the projector 13 is mounted on a position / angle adjusting device for adjusting the projection direction of the video.

The projector 13 enlarges the image with a lens and projects it onto the reflecting mirror 14. This image is reflected by the reflecting mirror 14 and projected onto the front screen 15.
FIG. 2 is a diagram illustrating the structure of the position / angle adjustment device 21 that adjusts the projection position of the image of the projector 13.

  2B is a front view, FIG. 2A is a left side view, FIG. 2C is a right side view, FIG. 2D is a top view, and FIG. 2E is a position / angle adjustment. It is a figure which shows X-axis, Y-axis, Z-axis of the adjustment direction of the position of the apparatus 21, and (alpha), (beta), (theta) direction of an angle adjustment direction. In the side view of FIG. 2A, the projector 13 mounted on the Y-axis adjustment mechanism 22 is indicated by a dotted line.

  In the following description, the vertical direction indicated by the arrow Y in FIG. 2E is the Y axis, the horizontal direction indicated by the arrow X is the X axis, and the direction indicated by the arrow Z (the direction from the front side to the back side in FIG. 2). The angle around the Z axis and the Y axis is β, the angle around the X axis is α, and the angle around the Z axis is θ.

  The position / angle adjusting device 21 adjusts the Y axis adjusting mechanism 22 for adjusting the angle β with the Y axis direction and the Y axis as the central axis, and the angle α with the X axis direction and the X axis as the central axes. The X-axis adjusting mechanism 23 and the Z-axis adjusting mechanism 24 for adjusting the angle θ with the Z-axis direction and the Z-axis as the central axis are integrally configured.

As shown in FIG. 2A, the X-axis adjustment mechanism 23 is fixed to a movable part (described later) of the Z-axis adjustment mechanism 24, and the Y-axis adjustment mechanism 22 is fixed to the movable part of the X-axis adjustment mechanism 23. Yes.
Therefore, by adjusting the X-axis adjusting mechanism 23, the Y-axis adjusting mechanism 22, and the Z-axis adjusting mechanism 24, respectively, six axes of X, Y, Z axis directions and angles α, β, θ around the respective axes are used. Can be adjusted.

  As shown in FIG. 2B, the Y-axis adjusting mechanism 22 includes a main body 31, a guide fitting 34, a movable part 35, shafts 32, 33, and 40 extending in the Y-axis direction, and adjusting screws 25 and 26. And have. These correspond to the Y-axis adjustment unit and the Y-axis angle adjustment unit.

  An adjustment screw 25 composed of a hexagonal bolt is movably attached to the upper side surface (as viewed from the front of FIG. 2) of the Y-axis adjustment mechanism 22, and this adjustment screw 25 is fixed to the movable portion 35. Inserted into the nut. The position of the movable portion 35 in the Y-axis direction can be adjusted by rotating the adjusting screw 25 clockwise or counterclockwise.

  As shown in FIGS. 2A and 2B, an adjustment screw 26 made of a hexagonal bolt for adjusting the angle β is movably attached to the left side surface of the Y-axis adjustment mechanism 22. The adjustment screw 26 is connected to a nut fixed to the guide fitting 34. By rotating the adjusting screw 26 clockwise or counterclockwise, the guide fitting 34 can be moved in a direction perpendicular to the Y axis, and thereby the movable portion 35 can be rotated about the shaft 33. The operation for adjusting the angle β will be described in detail later.

  As shown in FIG. 2D, the X-axis adjusting mechanism 23 includes a main body 51, a guide fitting 54, a movable portion 55, shafts 52, 53, 56 extending in the X-axis direction, and adjusting screws 27, 28. Have These correspond to the X-axis adjusting unit and the X-axis angle adjusting unit.

  An adjustment screw 27 for adjusting the position in the X-axis direction is movably attached to the right side surface of the main body 51 of the X-axis adjustment mechanism 23, and the adjustment screw 27 is fixed to the movable portion 55. It is inserted into a nut (not shown). An adjustment screw 28 for adjusting the angle α is provided on the lower surface of the main body 51, and the adjustment screw 28 is inserted into a nut fixed to the guide metal fitting 54.

  3A to 3C are a top view, a front view, and a side view of the Z-axis adjusting mechanism 24 alone. The Z-axis adjustment mechanism 24 has the same structure as the Y-axis adjustment mechanism 22 and the X-axis adjustment mechanism 23 shown in FIG.

  As shown in FIG. 3A, the Z-axis adjusting mechanism 24 includes a main body 71, a guide fitting 74, a movable part 75, shafts 72, 73, 76 extending in the Z-axis direction, and adjusting screws 29, 30. Have These correspond to the Z-axis adjustment unit and the Z-axis angle adjustment unit.

  Two shafts 72 and 73 extending in the Z-axis direction are fixed to the main body 71 by press-fitting or screwing. A shaft 76 is fixed to the movable portion 75 by press-fitting or screwing. A nut 77 is fixed to the lower side surface 75 a of the movable part 75 by welding or the like, and an adjustment screw 29 movably attached to the lower side surface 71 a of the main body part 71 is inserted into the nut 77.

Therefore, the movable portion 75 can be moved in the Z-axis direction by rotating the adjustment screw 29 on the lower surface 71a of the main body portion 71 clockwise or counterclockwise.
A nut 78 is fixed to the right side surface 74 a of the guide metal fitting 74 by welding or the like, and an adjustment screw 30 movably attached to the right side surface 71 b of the main body 71 is inserted into the nut 78. By rotating the adjusting screw 30 clockwise or counterclockwise, the guide fitting 74 can be moved in a direction perpendicular to the Z axis.

  As shown in FIG. 3B, three elongated holes 81, 82, 83 are provided on both side surfaces of the guide fitting 74. The elongated hole 81 has a shaft 72, and the elongated hole 83 has a shaft 76. The shafts 73 are inserted into the long holes 82, respectively. The longitudinal direction of the elongated hole 83 between the elongated holes 81 and 82 has a predetermined inclination with respect to the longitudinal direction of the elongated holes 81 and 82.

  Therefore, for example, when the adjustment screw 30 is rotated counterclockwise and the guide metal fitting 74 is moved to the left (as viewed from the front in FIG. 3), the movable portion 75 to which the shaft 76 is attached supports the shaft 73 as a fulcrum. Move vertically upward. As a result, the movable part 75 rotates around the shaft 73 by a predetermined angle in the clockwise direction. Further, when the adjustment screw 30 is rotated clockwise and the guide fitting 74 is moved rightward, the movable portion 75 to which the shaft 76 is attached moves vertically downward about the shaft 73. As a result, the movable part 75 rotates counterclockwise by a predetermined angle about the shaft 73.

  In addition, since the movable part 75 is connected with the adjustment screw 29, it is necessary to make the adjustment screw 29 movable so that the movable part 75 moves in the vertical direction. Therefore, in this embodiment, the adjustment screw 29 is movably attached to the main body 71 using an adjustment screw fixing plate 91 as shown in FIG. Similarly, the adjustment screw 30 is movably attached to the main body 71 using an adjustment screw fixing plate 91.

  As shown in FIG. 4B, the adjustment screw fixing plate 91 is provided with a long hole 92 having a size that allows the adjustment screw 29 to move in the center. A hatched area 93 in the elongated hole 92 in FIG. 4B shows an adjustment range when the angle of the movable portion 75 is adjusted by the adjustment screw 30. The elongated hole 92 of the adjustment screw fixing plate 91 is A hole larger than the region 93 indicated by the oblique lines is formed. The main body 71 has a hole larger than the long hole 92.

  FIG. 4A is a view showing a mounting structure of the adjusting screw. A member below the adjustment screw fixing plate 91 is a ring-shaped adjustment screw retaining member 94. The adjustment screw retaining member 94 is fixed to the adjustment screw 29 by tightening the side screw 94 a with the adjustment screw fixing plate 91 sandwiched between the adjustment screw retaining member 94 and the head of the adjustment screw 29. As a result, the adjustment screw 29 can be prevented from falling off the main body 71.

  As shown in FIG. 4A, the adjustment screw 29 is inserted into the elongated hole 92 of the adjustment screw fixing plate 91, and the adjustment screw fixing plate 91 is fixed to the main body 71 with two screws 95. Further, the adjustment screw retaining member 94 is fixed to the adjustment screw 29.

  By attaching the adjustment screw 29 to the main body 71 using the adjustment screw fixing plate 91 in this way, the adjustment screw 92 can be moved within the range of the size of the elongated hole 92, and therefore can be moved by the adjustment screw 30 in FIG. An angle with the Z axis of the portion 75 as the central axis can be arbitrarily adjusted. The other adjustment screws 22 to 28 and 30 are similarly attached to the main body using the adjustment screw fixing plate 91 so as to be movable.

  The Z-axis adjusting mechanism 24 described above can adjust the position of the movable part 75 in the Z-axis direction with the adjusting screw 29 and can arbitrarily adjust the angle θ around the Z-axis of the movable part 75 with the adjusting screw 30. .

As shown in FIGS. 2A and 2C, the X-axis adjustment mechanism 23 is mounted on the Z-axis adjustment mechanism 24, and the Y-axis adjustment mechanism 22 is attached integrally with the X-axis adjustment mechanism 23. .
Accordingly, the two adjusting screws 29 and 30 of the Z-axis adjusting mechanism 24 are adjusted to adjust the position in the Z-axis direction and the angle θ with the Z-axis as the central axis, and the two adjusting screws of the X-axis adjusting mechanism 23 are adjusted. 27 and 28 are adjusted to adjust the position in the X-axis direction and the angle α with the X-axis as the central axis, and the two adjusting screws 25 and 26 of the Y-axis adjusting mechanism 22 are further adjusted to adjust the position in the Y-axis direction. And the angle β with the Y axis as the central axis can be adjusted. Thereby, the position of the image projected on the screen 15 can be precisely adjusted by adjusting the projection angle of the projector 13 mounted on the movable portion 35 of the Y-axis adjusting mechanism 22 in the six-axis direction.

Next, FIGS. 5A and 5B are a CC ′ cross-section and a DD ′ cross-sectional view of FIG.
As shown in the CC ′ cross-sectional view of FIG. 5A, a long hole 36 into which the shaft 32 is inserted, a long hole 41 into which the shaft 40 is inserted, and the guide fitting 34 of the Y-axis adjusting mechanism 22; A long hole 37 into which the shaft 33 is inserted is provided. The longitudinal direction of the long hole 41 has a predetermined inclination with respect to the longitudinal direction of the long holes 36 and 37.

  As shown in the DD ′ cross-sectional view of FIG. 5B, the guide metal fitting 54 of the X-axis adjusting mechanism 23 includes a long hole 57 into which the shaft 52 is inserted, a long hole 58 into which the shaft 53 is inserted, A long hole 59 into which the shaft 56 is inserted is provided. The longitudinal direction of the elongated hole 59 has a predetermined inclination with respect to the longitudinal direction of the elongated holes 57 and 58.

  Next, FIG. 6 is a diagram schematically illustrating the structure of the Y-axis adjustment mechanism 22, and FIG. 7 is an exploded view of the Y-axis adjustment mechanism 22. In FIGS. 6 and 7, the adjusting screws 29 and 30 in FIG. 2 and their mounting structure are simplified and shown as adjusting screws 43 and 44.

  As shown in FIGS. 6 and 7, the Y-axis adjusting mechanism 22 includes a main body portion 31, three shafts 32, 33, and 40 extending in the Y-axis direction, a guide fitting 34, a movable portion 35, and an adjusting screw. 43.44. On this movable part 35, the projector 13 shown with a dotted line in FIG. 7 (A), (B) is mounted.

  As shown in FIG. 6, the main body 31 has an upper side surface 31a and a lower side surface 31b bent at 90 degrees with respect to the bottom surface, and a left side surface 31c bent at 90 degrees with respect to the bottom surface. A shaft 32 and a shaft 33 are attached to the upper side surface 31a and the lower side surface 31b of the main body 31 by press-fitting, screwing, or the like. The shaft 40 is attached to the movable portion 35 by press fitting, screwing, or the like.

  On the upper side surface 34a of the guide fitting 34, a long hole 36 into which the shaft 32 is inserted, a long hole 37 into which the shaft 33 is inserted, and the longitudinal direction of the long holes 36, 37 have a predetermined angle in the longitudinal direction. A long hole 41 is provided.

  Further, the lower surface 34b of the guide fitting 34 has a long hole 38 into which the shaft 32 is inserted, a long hole 39 into which the shaft 33 is inserted, and the longitudinal direction of the long holes 38 and 39 is predetermined. An elongated hole 42 having an angle is provided. The shaft 40 is inserted into the long holes 41 and 42.

  An adjustment screw (corresponding to the adjustment screw 25) 43 for moving the movable portion 35 in the Y-axis direction is movably attached to the upper side surface 31a of the main body 31. Specifically, it is movably attached to the main body 31 using the adjustment screw fixing plate 91 described above.

  An adjustment screw (corresponding to the adjustment screw 26) 44 that moves the guide fitting 34 in a direction orthogonal to the Y axis is movably attached to the left side surface 31c of the main body 31. Although not shown, the adjustment screw 44 is inserted into a nut or the like that is fixed to the left side surface 34c of the guide fitting 34. By rotating the adjustment screw 44, the guide fitting 34 is moved to the right in FIG. Can be moved to the left).

  First, adjustment of the position in the Y-axis direction will be described. When the adjustment screw 43 is rotated in the clockwise direction, the movable portion 35 moves in a direction approaching the adjustment screw 43 (vertical upward direction in FIG. 6). Further, when the adjustment screw 43 is rotated counterclockwise, the movable portion 35 moves in a direction away from the adjustment screw 43 (vertical downward direction in FIG. 6).

Therefore, the position of the movable portion 35 of the Y-axis adjustment mechanism 22 in the Y-axis direction can be arbitrarily adjusted by adjusting the adjustment screw 43.
Next, adjustment of the angle β around the Y axis will be described. When the adjustment screw 44 is rotated counterclockwise, the guide fitting 34 moves in a direction away from the adjustment screw 44 (rightward when viewed from the front in FIG. 6). When the guide fitting 34 moves in the right direction, the shaft 40 inserted into the elongated holes 41 and 42 formed obliquely is obliquely upward along the elongated hole 41 with respect to the bottom surface of the main body 31 (see FIG. 6). The movable portion 35 rotates counterclockwise about the shaft 33 because the position of the movable portion 35 in the left-right direction in FIG.

  When the adjustment screw 44 is rotated clockwise, the guide fitting 34 moves in a direction approaching the adjustment screw 44 (leftward as viewed from the front in FIG. 6). When the guide fitting 34 moves to the left, the shaft 40 inserted into the elongated holes 41 and 42 formed obliquely tends to move obliquely downward with respect to the bottom surface of the main body 31 along the elongated hole 41. However, since the movement of the movable portion 35 in the left-right direction in FIG. 6 is restricted by the shaft 33, the movable portion 35 rotates clockwise about the shaft 33.

Therefore, the movable portion 35 can be rotated about the Y axis as the central axis by rotating the adjustment screw 44 clockwise or counterclockwise.
As described above, by rotating the adjusting screws 43 and 44 clockwise or counterclockwise, the position of the movable portion 35 in the Y-axis direction and the angle β around the Y-axis can be arbitrarily adjusted.

  Regarding the X-axis adjustment mechanism 23 and the Z-axis adjustment mechanism 24, as in the above-described Y-axis adjustment mechanism 22, the positions in the X-axis and Z-axis directions and the angles α and θ around those axes can be arbitrarily adjusted. it can.

  Next, FIG. 8 is an explanatory diagram of a method for adjusting the Y axis and the β axis. 8A to 8C are views of the surface including the shafts 32, 33, and 40 extending in the Y-axis direction as viewed from above, and FIGS. 8D to 8F are cross-sectional views thereof. .

  8A shows a state before adjustment of the position in the Y-axis direction, FIG. 8B shows a state when moved in the Y-axis upward direction, and FIG. The state when moved downward in the axis is shown. 8D shows a state before adjusting the angle β (referred to as the β axis) about the Y axis, and FIG. 8E shows the movable portion 35 in the clockwise direction on the β axis. FIG. 8F shows a state when the movable portion 35 is rotated counterclockwise about the β axis.

  When the adjustment screw 25 on the upper surface of the main body 31 is rotated in the clockwise direction in the state of FIG. 8A, the adjustment screw 25 is inserted into a nut fixed to the movable portion 35. Moves in the direction approaching the adjusting screw 25, that is, in the Y-axis upward direction shown in FIG.

Further, when the adjustment screw 25 on the upper surface of the main body 31 is rotated counterclockwise, the movable portion 35 moves away from the adjustment screw 25, that is, the Y-axis downward direction shown in FIG. 8C.
Therefore, the position of the movable portion 35 in the Y-axis direction can be arbitrarily adjusted by changing the rotation direction and the rotation amount of the adjustment screw 25.

  8D, when the adjustment screw 26 provided on the side surface parallel to the Y-axis of the main body 31 is rotated clockwise, the guide fitting 34 approaches the adjustment screw 26, that is, 8 (E) moves in the direction indicated by the downward arrow. When the guide fitting 34 moves in the direction of the downward arrow in FIG. 8E, the movement of the movable portion 35 in which the shaft 40 is inserted into the elongated hole 41 is restricted by the shaft 33 in the downward direction. , Rotate clockwise about the shaft 33. As a result, the mounting surface on which the projector 13 of the movable portion 35 is mounted rotates from the vertical state by a predetermined angle (about −1.5 ° in FIG. 8E) in the clockwise direction.

  When the adjustment screw 26 of the main body 31 is rotated counterclockwise, the guide fitting 34 moves in a direction away from the adjustment screw 26, that is, a direction indicated by an upward arrow in FIG. When the guide fitting 34 moves in the direction indicated by the upward arrow in FIG. 8F, the movable portion 35 rotates counterclockwise about the shaft 33, contrary to FIG. 8E. As a result, the mounting surface on which the projector 13 of the movable portion 35 is mounted rotates from the vertical state by a predetermined angle (about + 1.5 ° in FIG. 8F) counterclockwise.

Therefore, the inclination angle of the mounting surface of the movable part can be arbitrarily adjusted by changing the rotation direction and the rotation amount of the adjustment screw 26.
According to the above-described embodiment, the Y-axis adjustment mechanism 22, the X-axis adjustment mechanism 23, and the Z-axis adjustment mechanism 24, which are biaxial adjustment mechanisms that can arbitrarily adjust the position in the axial direction and the angle around the axis, are provided. Six axes (X, Y, Z, α, β, θ axes) can be precisely adjusted by integrally configuring the three adjusting mechanisms. Further, since the two-axis adjusting mechanism is combined, the structure of each adjusting mechanism is simplified, and the manufacturing cost of the entire apparatus can be reduced. This can reduce the cost of the projection display device.

The present invention is not limited to the embodiment described above, and may be configured as follows, for example.
(1) In the embodiment, the adjustment screws 25 to 30 are all movable using the adjustment screw fixing plate 91, but only a necessary portion of the adjustment screw may be movable. The adjusting screw is not limited to a hexagonal bolt, and other screws may be used.
(2) Although the embodiment has been described with respect to the case where the two-axis adjusting mechanism is configured by three shafts and three elongated holes are formed, the number of shafts is not limited to three.
(4) In the embodiment, for example, the position of the movable plate 35 of the Y-axis adjustment mechanism 22 is adjusted by the adjustment screw 25. However, the present invention is not limited to this structure, and the position of the guide fitting is adjusted by the adjustment screw 25. You may make it do.
(5) The two adjusting screws for adjusting the shaft and the angle about the shaft are not limited to the structure attached to the same main body, and may be attached to different members.

It is an external view of a display apparatus. 2A to 2E are views showing the structure of the position / angle adjusting device. 3A to 3C are diagrams showing the structure of the Z-axis adjusting mechanism. 4 (A) and 4 (B) are views showing the mounting structure of the adjusting screw. It is a C-C 'cross section and a D-D' cross section. It is a figure which shows the structure of a Y-axis adjustment mechanism. 7A to 7C are exploded views of the Y-axis adjustment mechanism. 8A to 8F are explanatory diagrams of a method for adjusting the Y axis and the β axis. It is a figure which shows the structure of the conventional angle adjustment apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Display apparatus 12 Projection type display apparatus 13 Projector 14 Reflector 15 Screen 21 Position / angle adjustment apparatus 22 Y-axis adjustment mechanism 23 X-axis adjustment mechanism 24 Z-axis adjustment mechanism 31 Main body part 32, 33 Axis 34 Guide metal fitting 35 Movable part 40 axis 25-30 adjustment screw

Claims (4)

An X-axis adjustment mechanism having an X-axis adjustment unit that adjusts the position of the first movable unit in the X-axis direction, and an X-axis angle adjustment unit that adjusts an angle around the X axis of the first movable unit; ,
A Y-axis adjustment mechanism having a Y-axis adjustment unit that adjusts the position of the second movable unit in the Y-axis direction, and a Y-axis angle adjustment unit that adjusts an angle around the Y axis of the second movable unit; ,
A Z-axis adjustment mechanism having a Z-axis adjustment unit that adjusts a position of the third movable unit in the Z-axis direction, and a Z-axis angle adjustment unit that adjusts an angle around the Z axis of the third movable unit; Is configured as a unit ,
The X-axis adjusting unit and the X-axis angle adjusting unit of the X-axis adjusting mechanism are rotatably supported by the main body unit to which the first and second shafts extending in the X-axis direction are attached and the first or second shaft. The first movable part to which the third shaft extending in the X-axis direction is attached, the first adjustment screw for adjusting the position of the first movable part in the X-axis direction, the first and first The first and second elongated holes into which the second shaft is inserted, and the third shaft is inserted, and the longitudinal direction has a predetermined inclination with respect to the longitudinal direction of the first and second elongated holes. And a second adjustment screw that adjusts the angle of the first movable part, and the second adjustment screw moves the guide part in a direction perpendicular to the X axis. And moving the third axis of the first movable part along the third elongated hole of the guide part to move the first movable part to X It is rotated to adjust the angle around the,
The first adjustment screw that adjusts the position in the X-axis direction is connected to the first movable part, and the first movable part is adjusted when an angle about the X axis is adjusted by the second adjustment screw. A position / angle adjusting device for movably attaching the first adjusting screw to the main body so that the first adjusting screw can rotate . Said first adjusting screw of the X-axis adjusting mechanism is connected to the first movable portion, the position and angle adjusting device according to claim 1 for adjusting the X-axis direction position of the first movable portion. The Y-axis adjusting unit and the Y-axis angle adjusting unit of the Y-axis adjusting mechanism rotate about the fourth or fifth axis with the second main body portion to which the fourth and fifth axes extending in the Y-axis direction are attached. A second movable part supported by a sixth axis extending in the Y-axis direction, a third adjustment screw for adjusting the position of the second movable part in the Y-axis direction, and the fourth And the fourth and fifth elongated holes into which the fifth shaft is inserted and the sixth shaft are inserted, and the longitudinal direction has a predetermined inclination with respect to the longitudinal direction of the fourth and fifth elongated holes. A second guide portion having a sixth oblong hole; and a fourth adjustment screw for adjusting an angle of the second movable portion; and the second guide portion is moved to the Y-axis by the fourth adjustment screw. By moving the sixth axis of the second movable part along the sixth elongated hole of the second guide part. Position and angle adjusting device according to claim 1 or 2 is rotated to adjust the angle of the second movable portion around the Y axis. The Z-axis adjusting portion and the Z-axis angle adjusting portion of the Z-axis adjusting mechanism rotate around the third main body portion to which the seventh and eighth shafts extending in the Z-axis direction are attached and the seventh or eighth shaft. A third movable part supported by a ninth axis extending in the Z-axis direction, a fifth adjustment screw for adjusting the position of the third movable part in the Z-axis direction, and the seventh And the eighth shaft into which the eighth shaft is inserted and the ninth shaft are inserted, and the longitudinal direction has a predetermined inclination with respect to the longitudinal direction of the seventh and eighth slots. A third guide portion having a ninth elongated hole; and a sixth adjustment screw for adjusting an angle of the third movable portion, wherein the third guide portion is moved to Z by the sixth adjustment screw. By moving in a direction orthogonal to the axis, and moving the ninth axis of the third movable part along the ninth slot of the third guide part. Serial third position and angle adjusting device according to the movable portion to claim 1 or 2 to adjust the angle by rotating about the Z axis of the.