JP2006106078A - Projecting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily install a projector main body by making a projecting direction easy to change. <P>SOLUTION: The projecting device is equipped with a main body case 10 and an optical engine housing case 12 housing an optical engine, arranged to freely turn respectively centering around one or more rotatinal axis having predetermined positional relation to the main body case and capable of projecting the light from the optical engine in an optional direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a projection apparatus that projects an optical image using a light valve.

  In recent years, projectors that enlarge and project video light onto a screen using a projection lens have been commercialized in response to a demand for a large screen. Such a projector is an effective display means when, for example, a large number of people can view a video full of realism.

  By the way, the projector enlarges and projects an image by disposing a projector body including an optical engine that emits image light away from the screen. In this case, it is necessary to set an appropriate projection direction according to the position of the projection lens provided in the optical engine and the position of the screen. If the projection direction is not appropriate, the image may be displayed at a position shifted from the screen, or the image may be distorted on the screen.

Accordingly, in Patent Document 1, the bottom surface of the projector body is supported by several feet, and the feet are screwed so that the amount of screwing is adjusted for each foot, whereby the vertical inclination of the projection direction (the vertical angle of the projection direction) ) And a tilt in the rotational direction (horizontal angle in the projection direction) about the center of the projection lens is disclosed.
JP 2000-267191 A

  However, the projector main body is relatively heavy, and adjustment of the projection direction by the screwing amount of the foot on the bottom surface of the main body has a problem that adjustment work is extremely complicated.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a projection apparatus capable of adjusting the projection direction with the projector body fixed.

  The projection apparatus according to the present invention includes a main body housing and an optical engine, and is disposed so as to be rotatable about one or more rotation shafts each having a predetermined positional relationship with the main body housing. An optical engine housing case capable of projecting light from the engine in an arbitrary direction is provided.

  According to such a configuration, the optical engine housing case is disposed in the main body case so as to be rotatable about one or more rotation shafts. By rotating the optical engine housing case within the main body case, the projection light from the optical engine can be projected in an arbitrary direction without moving the main body case. Thereby, the complicated installation work of a main body housing | casing becomes unnecessary.

  The one or more rotating shafts extend in three directions around a spherical support member, and the optical engine storage housing is rotatable by the support member fixed to the main body housing. It is supported and arrange | positioned in the said main body housing | casing.

  According to such a configuration, the optical engine housing case is supported by the support member fixed to the main body case, and rotates around the rotation shaft extending in three directions from the center of the spherical portion of the support member. Thereby, the projection light from the optical engine can be controlled to be emitted in three directions.

  In the projection device according to the aspect of the invention, the one or more rotation shafts may include a first axis orthogonal to a vertical plane including a front-rear direction axis of the main body casing and a left-right axis of the main body casing. A first mechanism that includes a second axis that is orthogonal to the vertical plane and that is attached to the main body casing and rotates the optical engine storage casing about the first axis; and And a second mechanism that is attached and rotates the optical engine housing case about the second axis.

  According to such a configuration, the first mechanism can rotate the optical engine housing case in a vertical plane including the longitudinal axis of the main body case, and the vertical angle in the projection direction can be adjusted. it can. In addition, the second mechanism can rotate the optical engine storage housing in a vertical plane including the horizontal axis of the main body housing, and the horizontal angle in the projection direction can be adjusted.

  The one or more rotation axes include a first axis orthogonal to a vertical plane including an axis in the front-rear direction of the main body casing, and a third axis orthogonal to a horizontal plane. A first mechanism that is attached and rotates the optical engine housing case about the first axis, and is attached to the main body case and rotates the optical engine housing case about the third axis And a third mechanism.

  According to such a configuration, the first mechanism can rotate the optical engine housing case in a vertical plane including the longitudinal axis of the main body case, and the vertical angle in the projection direction can be adjusted. it can. In addition, the third mechanism can rotate the optical engine housing in a horizontal plane, and can adjust the left-right angle in the projection direction.

  Further, the one or more rotation axes are orthogonal to a first axis perpendicular to a vertical plane including a longitudinal axis of the main body casing and a vertical plane including a horizontal axis of the main body casing. A first mechanism that includes two axes and a third axis that is orthogonal to a horizontal plane and that is attached to the main body casing and rotates the optical engine housing casing about the first axis; and the main body A second mechanism that is attached to the housing and rotates the optical engine housing case around the second axis; and the optical engine housing case that is attached to the main body case and that is centered on the third axis. And a third mechanism for rotating the body.

  According to such a configuration, the first mechanism can rotate the optical engine housing case in a vertical plane including the longitudinal axis of the main body case, and the vertical angle in the projection direction can be adjusted. it can. By the second mechanism, the optical engine housing case can be rotated within a vertical plane including the horizontal axis of the main body case, and the horizontal angle in the projection direction can be adjusted. In addition, the third mechanism can rotate the optical engine housing in a horizontal plane, and can adjust the left-right angle in the projection direction.

  Further, according to one aspect of the present invention, there is provided a middle housing that is housed in the main body housing and houses the optical engine housing housing, and the third mechanism is attached to the main body housing. The middle casing is rotatably supported on the third shaft, and the first mechanism rotates the optical engine storage casing on the first shaft attached to the middle casing. The second mechanism is configured by rotatably supporting the optical engine housing casing on the second shaft attached to the inner casing. Features.

  According to such a configuration, the optical engine storage housing housed in the middle housing is rotated about the third shaft by the third mechanism that rotatably supports the middle housing by the third shaft. It can rotate freely. Further, the optical engine housing case is rotated about the first and second axes by the first and second mechanisms that rotatably support the optical engine housing case by the first and second shafts. It is free.

  In addition, the first to third mechanisms are connected to a first gear attached to the optical engine housing case and an operation unit provided outside the main body case, and are connected to the first gear. And a second gear to be combined.

  According to such a configuration, the second gear can be rotated by operating the operation unit, and the first gear meshing with the second gear can be rotated. As a result, the optical engine storage housing can be rotated about the first to third axes.

  In addition, the first to third mechanisms are screws that are connected to an operation unit provided outside the main body housing and press a part of the optical engine housing housing with a protruding amount according to the operation of the operation unit. It is comprised by a part.

  According to such a configuration, by operating the operation unit, the protruding amount of the screw portion changes, and the amount by which the optical engine storage housing is pushed out changes. As a result, the optical engine storage housing can be rotated about the first to third axes.

  The projection apparatus according to the present invention includes a projection lens unit that houses a projection lens into which light to be projected is incident, and the direction of the optical axis of the projection lens with the projection lens unit as the center of the optical center of the projection lens. And a support mechanism support mechanism for changing the direction of light emitted from the projection lens.

  According to such a configuration, the projection lens unit is rotatably supported by the support mechanism. Thereby, the direction of the light incident on the projection lens can be changed to project the light in a desired projection direction.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 5 relate to the first embodiment, and FIG. 1 is a cross-sectional view of the projection apparatus according to the first embodiment of the present invention as viewed from the side. FIG. 2 is an explanatory diagram showing an optical system of an optical engine incorporated in the projection apparatus. FIG. 3 is a rear view showing the rear surface of the projection apparatus in FIG. FIG. 4 is a cross-sectional view showing a state in which the projection direction is upward. FIG. 5 is an explanatory diagram for explaining the change of the horizontal angle in the projection direction.

  First, the structure of the optical system of the optical engine will be described with reference to FIG. The example of FIG. 2 shows an example of a liquid crystal projector using a liquid crystal device which is an electro-optical device as a light valve. In addition, although the example of FIG. 2 has shown the structure of a 3 plate type, it is applicable also to a single plate type optical engine.

  In FIG. 2, a liquid crystal projector 1100 uses three liquid crystal modules as light bulbs 100R, 100G, and 100B for RGB. When a projection light is emitted from a lamp unit 1102 of a white light source such as a metal halide lamp, the liquid crystal projector 1100 uses three mirrors 1106 and two dichroic mirrors 1108 to generate light components R, G, and R corresponding to the three primary colors of RGB. Divided into B, each color light is guided to the corresponding light valves 100R, 100G and 100B, respectively. In particular, the B light is guided through a relay lens system 1121 including an incident lens 1122, a relay lens 1123, and an exit lens 1124 in order to prevent light loss due to a long optical path. The light components corresponding to the three primary colors modulated by the light valves 100R, 100G, and 100B are synthesized again by the dichroic prism 1112 and then projected as a color image on the screen 1120 via the projection lens 1114.

  The optical engine is constituted by the lamp unit 1102 to the projection lens 1114 except for the screen 1120 in FIG. In FIG. 1, the optical engine is housed in the optical engine housing housing 12 (not shown). The optical engine housing case 12 has a lens barrel 13 on the tip side, and the projection lens 1114 is housed in the lens barrel 13.

  The projector shown in FIG. 1 has a substantially rectangular parallelepiped projector main body casing 10. The projector main body casing 10 as the main body casing includes an optical engine storage casing 12 in which an optical engine is stored, and other parts not shown. It is designed to store circuit components. The projector body housing 10 is arranged in a fixed manner on the pedestal by placing the pedestals 11 on, for example, the four corners of the bottom surface 10d and installing the pedestal 11 on a pedestal (not shown).

  A support member 15 is fixed substantially at the center of the bottom surface 10 d of the projector body housing 10. The support member 15 has a spherical support portion 17 at the tip and is formed to protrude upward. On the other hand, the optical engine storage housing 12 is provided with a locking portion 16 having a shape corresponding to the support portion 17 on the bottom surface so as to protrude into the housing. Since the support portion 17 of the support member 15 is slidably fitted in the locking portion 16, the optical engine storage housing 12 can be freely moved around the center of the locking portion 16 in the projector main body housing 10. You can change the direction.

  Note that the opening 14 provided in the front surface 10f of the projector main body 10 is slightly larger than the size of the tip of the lens barrel 13, and is particularly large in the vertical direction. The optical engine storage housing 12 can change the direction while being exposed. There are several urging members 20 disposed between the upper surface of the optical engine housing case 12 and the inside of the upper surface of the projector body case 10, and the orientation of the optical engine housing case 12 in the projector body case 10 Is to stabilize.

  An opening 23 is formed at a position behind the upper surface 10 u of the projector body housing 10, and a vertical angle adjustment knob 22 having a screw portion 21 is attached to the opening 23. The front end of the screw portion 21 presses the substantially central position in the left-right direction behind the upper surface of the optical engine storage housing 12. By rotating the vertical angle adjustment knob 22, the screw portion 21 is rotated, and the vertical position of the tip of the screw portion 21 is changed.

  Thereby, the upper surface of the optical engine storage housing 12 also moves according to the position of the tip of the screw portion 21. In other words, the optical engine storage housing 12 rotates with respect to the projector main body housing 10 in the vertical plane including the front-rear direction axis with the center of the locking portion 16 as the axis. Therefore, if the projector main body housing 10 is fixed, the vertical tilt of the projection lens in the projection direction, that is, the vertical angle of the projection direction can be adjusted by rotating the vertical angle adjustment knob 22.

  A gear 31 is fixed to a position on the back surface of the optical engine storage housing 12 corresponding to the position of the locking portion 16. A gear 32 that meshes with the gear 31 is rotatably attached to the back surface of the optical engine storage housing 12. On the other hand, a long hole 34 is formed at the position of the rear surface 10 b of the projector body housing 10 facing the gear 32, and a shaft 33 is rotatably attached to the long hole 34. The shaft 33 is connected to the gear 32 at the distal end side, and a horizontal angle adjustment knob 35 is attached to the base end of the shaft 33 on the outside of the back surface 10 b of the projector body housing 10.

  FIG. 3 shows the back surface 10 b of the projector body housing 10. As shown in FIG. 3, the elongated hole 34 has a horizontal dimension substantially equal to the shaft 33, and the vertical dimension is sufficiently long. The shaft 33 is supported by the elongated hole 34 and can transmit the rotation of the horizontal angle adjustment knob 35 to the gear 32. As the gear 32 rotates, the gear 31 rotates, and the optical engine storage housing 12 to which the gear 31 is fixed also rotates in the vertical plane including the left-right axis about the center of the locking portion 16. . Since the projector main body housing 10 is fixed, the inclination of the rotation direction around the center of the projection lens, that is, the horizontal angle in the projection direction can be adjusted by rotating the horizontal angle adjustment knob 35.

  A spring member 36 is interposed between the rear surface of the gear 32 and the inner surface of the back surface 10 b of the projector main body housing 10. The spring member 36 presses the rear surface of the gear 32 and biases the gear 32 forward. As a result, the shaft 33 and the horizontal angle adjustment knob 35 connected to the gear 32 are urged forward, and the front surface of the horizontal angle adjustment knob 35 comes into contact with the friction fixing plate 37. The friction fixing plate 37 is fixed to the rear surface 10b of the projector body housing 10, and the front surface of the horizontal angle adjustment knob 35 abuts against the friction fixing plate 37, so that the rotation of the horizontal angle adjustment knob 35 is caused by the frictional force between the two. Is to be blocked.

  The operation of the embodiment thus configured will be described.

  The user installs the projector body 10 by placing the base 11 on a pedestal (not shown). Here, it is assumed that the user adjusts the vertical angle in the projection direction. In this case, the user rotates the vertical angle adjustment knob 22 disposed on the upper surface 10 u of the projector body housing 10. By this rotation, the screw portion 21 also rotates, and the screwing amount of the screw portion 21 changes. Accordingly, the optical engine storage housing 12 sinks downward or rises upward against the biasing member 20 while the rear end of the upper surface abuts against the tip of the screw portion 21. Thus, the optical engine storage housing 12 rotates in the vertical plane including the front-rear direction axis with the center of the locking portion 16 as the axis.

  FIG. 4 shows an example in which the front end of the screw portion 21 pushes down the rear end side of the upper surface of the optical engine storage housing 12. In this case, the tip end side of the optical engine housing case 12 is lifted upward, and the projection direction is directed upward. Thus, the vertical angle in the projection direction of the projection lens 1114 (see FIG. 2) is adjusted by the vertical angle adjustment knob 22.

  Next, it is assumed that the user adjusts the horizontal angle in the projection direction. In this case, the user rotates the horizontal angle adjustment knob 35 provided on the back surface 10 b of the projector main body housing 10. That is, the user rotates the horizontal angle adjusting knob 35 against the biasing force of the spring member 36 and then pulls the horizontal angle adjusting knob 35 forward. By moving the horizontal angle adjustment knob 35 toward the front side, the horizontal angle adjustment knob 35 and the friction fixing plate 37 are separated from each other, and the horizontal angle adjustment knob 35 can be rotated.

  In this case, the horizontal angle adjustment knob 35 (shaft 33) may be moved to a position indicated by a broken line 33 'in FIG. Even in this case, the shaft 33 is supported by the elongated hole 34, and the rotation of the horizontal angle adjustment knob 35 can be transmitted to the gear 32. The rotation of the gear 32 is transmitted to the gear 31, and the optical engine storage housing 12 rotates in the vertical plane including the left and right axis about the center of the locking portion 16.

  FIG. 5 shows an example in which the horizontal angle adjustment knob 35 is rotated counterclockwise. In this case, the optical engine storage case 12 rotates clockwise as viewed from the back side, and changes from the optical engine storage case 12 indicated by a one-dot chain line to an optical engine storage case 12 ′ indicated by a two-dot chain line. Change. In other words, the horizontal angle in the projection direction changes in a direction that lowers to the right. Thus, the horizontal angle in the projection direction of the projection lens 1114 (see FIG. 2) is adjusted by the horizontal angle adjustment knob 35.

  As described above, in the present embodiment, the optical engine storage housing is rotatably supported in an arbitrary direction within the projector main body housing, and the optical engine storage housing is rotated within a vertical plane including the front-rear axis. It is possible to adjust the vertical angle in the projection direction by providing a mechanism, and it is possible to adjust the horizontal angle in the projection direction by providing a mechanism that rotates the optical engine storage housing in a vertical plane including the left and right axis. Yes. Accordingly, it is not necessary to perform a complicated operation for changing the orientation of the projector main body housing for the vertical angle adjustment and the horizontal angle adjustment, and the workability of the installation work is extremely excellent.

  In the present embodiment, the vertical angle is adjusted by pressing the rear end position of the optical engine storage housing with the screw portion and changing the screwing amount of the screw portion, and the optical engine storage housing is used with a gear. The horizontal angle was adjusted by applying a rotational force to a part of the body. However, the horizontal angle is adjusted by the amount of screwing in the screw part, and the rotational force is applied to a part of the optical engine housing case using a gear. It is obvious that the vertical angle adjustment may be performed with

  In the present embodiment, the horizontal angle is adjusted and the horizontal angle is fixed by combining two spur gears and using a friction fixing plate, but the flat gear fixed to the back surface of the optical engine housing is fixed. It is obvious that the angle adjustment and the fixing may be performed by rotating the spur gear from the side surface of the projector main body housing using the gear and the worm gear meshing with the spur gear.

  FIG. 6 is a cross-sectional view showing the projection apparatus according to the second embodiment of the present invention as viewed from the side. In FIG. 6, the same components as those in FIG.

  Although the first embodiment is an example in which the vertical angle adjustment and the horizontal angle adjustment in the projection direction are enabled, the present embodiment is the vertical direction adjustment in the projection direction and the projection direction in the horizontal plane, that is, the horizontal angle. This is an example in which adjustment is possible.

  In this embodiment, the gears 41 and 42, the shaft 43, the long hole 44, and the left and right angle adjustment are used instead of the gears 31 and 32, the shaft 33, the long hole 34, the horizontal angle adjustment knob 35, the spring member 36, and the friction fixing plate 37. The point which employ | adopted the knob 45, the spring member 46, and the friction fixing board 47 differs from 1st Embodiment.

  A gear 41 is fixed at a position on the upper surface of the optical engine storage housing 12 corresponding to the position of the locking portion 16. A gear 42 that meshes with the gear 41 is rotatably attached to the upper surface of the optical engine storage housing 12. On the other hand, a long hole 44 is formed at a position of the upper surface 10 u of the projector body housing 10 facing the gear 42, and a shaft 43 is rotatably attached to the long hole 44. The shaft 43 is connected to the gear 42 at the distal end side, and a left / right angle adjustment knob 45 is attached to the base end of the shaft 43 outside the upper surface 10 u of the projector body housing 10.

  The long hole 44 has a dimension in the left-right direction substantially equal to that of the shaft 43, and the dimension in the front-rear direction is slightly longer than the dimension in the left-right direction. The shaft 43 is supported by the elongated hole 44 and can transmit the rotation of the left / right angle adjustment knob 45 to the gear 42. As the gear 42 rotates, the gear 41 rotates, and the optical engine storage housing 12 to which the gear 41 is fixed also rotates in the horizontal plane around the center of the locking portion 16. Since the projector main body housing 10 is fixed, the rotation angle in the horizontal plane around the center of the locking portion 16, that is, the left and right angle in the projection direction can be adjusted by the rotation of the left and right angle adjustment knob 45.

  Note that the opening 14 provided in the front surface 10 f of the projector main body housing 10 is configured to be slightly larger than the size of the tip of the lens barrel 13. In the present embodiment, since the lens barrel 13 moves not only in the vertical direction but also in the horizontal direction, the opening 14 is set to a sufficient size in the vertical and horizontal directions. As a result, the optical engine storage housing 12 can change the direction while exposing the tip of the lens barrel 13.

  A spring member 46 is interposed between the upper surface of the gear 42 and the inner surface of the upper surface 10 u of the projector body housing 10. The spring member 46 presses the upper surface of the gear 42 and biases the gear 42 downward. As a result, the shaft 43 and the left / right angle adjustment knob 45 connected to the gear 42 are biased downward, and the lower surface of the left / right angle adjustment knob 45 abuts against the friction fixing plate 47. The friction fixing plate 47 is fixed to the upper surface 10 u of the projector body housing 10, and the lower surface of the left / right angle adjustment knob 45 abuts against the friction fixing plate 47, so that the rotation of the left / right angle adjustment knob 45 is caused by the frictional force of both. Is to be blocked.

  The operation of the embodiment thus configured will be described.

  The method for adjusting the vertical angle in the projection direction is the same as in the first embodiment. FIG. 7 shows an example in which the front end of the screw portion 21 pushes down the rear end side of the upper surface of the optical engine storage housing 12. In this case, the tip end side of the optical engine housing case 12 is lifted upward, and the projection direction is directed upward. Thus, the vertical angle in the projection direction of the projection lens 1114 (see FIG. 2) is adjusted by the vertical angle adjustment knob 22.

  Next, it is assumed that the user adjusts the left-right angle in the projection direction. In this case, the user rotates the left / right angle adjustment knob 45 provided on the upper surface 10 u of the projector body housing 10. In other words, the user rotates the left / right angle adjustment knob 45 against the biasing force of the spring member 46 and then rotates it. By moving the left / right angle adjustment knob 45 upward, the left / right angle adjustment knob 45 and the friction fixing plate 47 are separated from each other, and the left / right angle adjustment knob 45 can be rotated.

  In this case, the left / right angle adjustment knob 45 (shaft 43) is slightly moved in the front-rear direction by adjusting the vertical angle of the user. Even in this case, the shaft 43 is supported by the elongated hole 44, and the rotation of the left / right angle adjustment knob 45 can be transmitted to the gear 42.

  The rotation of the gear 42 is transmitted to the gear 41, and the optical engine storage housing 12 rotates in the horizontal plane around the center of the locking portion 16. The projector body case 10 is fixed, and the left and right angles of the projection direction of the projection lens 1114 (see FIG. 2) are adjusted by the rotation of the optical engine storage case 12.

  FIG. 8 shows an example in which the left / right angle adjustment knob 45 is rotated clockwise. In this case, the optical engine storage casing 12 rotates counterclockwise as viewed from the upper surface 10u side, and the optical engine storage casing 12 'indicated by the two-dot chain line from the optical engine storage casing 12 indicated by the one-dot chain line. Change to state. That is, the angle of the projection direction in the horizontal plane changes to an angle that is more leftward.

  As described above, in the present embodiment, the optical engine storage housing is rotatably supported in an arbitrary direction within the projector main body housing, and the optical engine storage housing is rotated within a vertical plane including the front-rear axis. By providing a mechanism, it is possible to adjust the vertical angle in the projection direction, and by providing a mechanism for rotating the optical engine housing case in the horizontal direction, the horizontal angle in the projection direction can be adjusted. Accordingly, it is not necessary to perform a complicated operation for changing the orientation of the projector main body casing for the vertical angle adjustment and the horizontal angle adjustment, and the workability of the installation work is extremely excellent.

  FIG. 9 is a sectional view showing a projection apparatus according to the third embodiment of the present invention as seen from the side. 9, the same components as those in FIGS. 1 and 6 are denoted by the same reference numerals, and the description thereof is omitted.

  This embodiment is an example in which the vertical angle adjustment, horizontal angle adjustment, and left-right angle adjustment in the projection direction are made possible.

  This embodiment employs an optical engine housing case 12 ′ having the same configuration as that of the optical engine housing case 12 of FIG. 1 and an intermediate housing 10 ′ having the same configuration as that of the projector main body case 10. The relationship between the optical engine housing case 12 ′ and the middle housing 10 ′ is the same as the relationship between the optical engine housing case 12 and the projector main body case 10 in FIG. With respect to the middle casing 10 ′, it can rotate in a vertical plane including an axis in the front-rear direction with the center of the locking portion 16 as an axis, and can rotate in a vertical plane including an axis in the left-right direction. Thus, if the middle casing 10 ′ is disposed within a fixed horizontal plane, the vertical angle adjustment and the horizontal angle adjustment in the projection direction are possible.

  In the present embodiment, the middle casing 10 ′ is accommodated in the projector main body casing 100. Bases 101 are provided at, for example, four corners of the bottom surface 100d of the projector main body 100, and the projector main body 100 is fixedly arranged on the base by disposing the base 101 on a base (not shown). It is like that.

  Bases 51 are attached to, for example, four places on the bottom surface 10d 'of the middle casing 10'. A roller 52 is attached to the lower end of the base 51, and the inner casing 10 ′ is supported by the roller 52 so as to be movable on the bottom surface 100 d of the projector main body casing 100.

  A bearing 107 is fixed to the position of the bottom surface 10 d ′ of the middle housing 10 ′ corresponding to the position of the locking portion 16. On the other hand, a rotating shaft 108 is provided on the bottom surface 10d of the projector main body casing 100 inward. The distal end of the rotating shaft 108 is attached to a bearing 107, and the inner casing 10 'is rotatable in a horizontal plane with the rotating shaft 108 as an axis.

  In the present embodiment, the gear 41 is fixed to the upper surface 10u 'of the middle casing 10'. The gear 41 is provided at a position corresponding to the position of the rotation shaft 108, and a gear 42 that meshes with the gear 41 is rotatably attached to the upper surface 10 u ′ of the middle housing 10 ′. A long hole 44 is formed at a position of the upper surface 100 u of the projector main body housing 100 facing the gear 42, and a shaft 43 is rotatably attached to the long hole 44. The shaft 43 is connected to the gear 42 at the distal end side, and a left / right angle adjustment knob 45 is attached to the base end of the shaft 43 outside the upper surface 100 u of the projector body housing 100.

  The long hole 44 has a dimension in the left-right direction substantially equal to that of the shaft 43, and the dimension in the front-rear direction is slightly longer than the dimension in the left-right direction. The shaft 43 is supported by the elongated hole 44 and can transmit the rotation of the left / right angle adjustment knob 45 to the gear 42. As the gear 42 rotates, the gear 41 rotates, and the middle casing 10 ′ to which the gear 41 is fixed also rotates in the horizontal plane about the rotation axis 108. Since the projector main body casing 100 is fixed, the rotation angle in the horizontal plane around the rotation axis 108, that is, the left and right angle in the projection direction can be adjusted by the rotation of the left and right angle adjustment knob 45.

  An opening 102 for exposing the lens barrel 13 is provided on the front surface 100f of the projector main body 100, and an opening 103 for operating the horizontal angle adjustment knob 35 is provided on the rear surface 100b. An opening 104 for operating the vertical angle adjustment knob 22 is provided in 100u.

  According to such a configuration, the vertical angle in the projection direction can be adjusted by the vertical angle adjustment knob 22, the horizontal angle in the projection direction can be adjusted by the horizontal angle adjustment knob 35, and the horizontal angle adjustment knob 45 can adjust the left-right angle of the projection direction. It should be noted that for the adjustment of the left and right angles, it is obvious that a configuration using the screw portion 21 and the vertical angle adjustment knob 22 can be adopted instead of the configuration using the gear 41 and the left and right angle adjustment knob 45. .

  In each of the above embodiments, the optical engine housing case is rotatably supported by the support member provided on the bottom surface of the projector main body case. However, the support member is provided on any surface of the projector main body case. Obviously it may be.

  FIG. 10 is an explanatory view showing a projection lens unit employed in the projection apparatus according to the fourth embodiment of the present invention. In FIG. 6, the same components as those of FIG.

  The projection lens unit 60 has a built-in projection lens 1114 composed of a plurality of lenses. The projection lens unit 60 is disposed so that the optical axis substantially coincides with the optical axis of the dichroic prism 1112. The projection lens unit 60 has a hemispherical projection 61, and the frame member 62 has a hemispherical recess 63 corresponding to the projection 61. The center of the projection 61 is located on a line that is orthogonal to the optical axis of the projection lens unit 60 and passes through the center of the projection lens 1114. By fitting the projection 61 and the recess 63 together, the projection lens unit 60 is rotatable about the central portion of the projection 61, that is, the lens center of the projection lens 1114. The relative position of the frame member 62 to the dichroic prism 1112 or the like is fixed.

  In the embodiment configured as described above, the projection lens unit 60 can be rotated about the lens center of the projection lens by using the protrusion 61 and the recess 63. Thereby, the direction (projection direction) of the optical axis of the projection lens unit 60 changes. In other words, the image light can be emitted in an arbitrary direction by changing the light emitted from the dichroic prism 1112 in the direction along the optical axis of the projection lens unit 60.

  As described above, in the present embodiment, the projection direction can be changed with a simple configuration, and the complicated work of changing the orientation of the projector body housing in order to obtain the optimum projection direction can be omitted. it can.

  In the example of FIG. 10, the rotation direction of the projection lens unit 60 is defined by the shapes of the protrusions 61 and the recesses 63. Therefore, it is conceivable to employ the projection lens unit shown in FIG.

  In FIG. 11, the projection lens unit 70 including the projection lens 1114 configured by a plurality of lenses is arranged so that the optical axis substantially coincides with the optical axis of the dichroic prism 1112. The projection lens unit 70 has a hemispherical protrusion 71, and the frame member 72 has a hemispherical recess 73 corresponding to the protrusion 71. The center of the protrusion 71 coincides with the center of the projection lens 1114. Thereby, the projection lens unit 70 is rotatable in an arbitrary direction around the central portion of the projection 71, that is, the lens center of the projection lens 1114.

Sectional drawing which shows the projection apparatus which concerns on the 1st Embodiment of this invention seeing from the side surface side. Explanatory drawing which shows the optical system of the optical engine integrated in a projection apparatus. The rear view which shows the back surface of the projection apparatus in FIG. Sectional drawing which shows the state which the projection direction turned upward. Explanatory drawing for demonstrating the change of the horizontal angle of a projection direction. Sectional drawing which shows the projection apparatus which concerns on the 2nd Embodiment of this invention seeing from the side surface side. Sectional drawing which shows the example when the front-end | tip of the screw part 21 pushes down the upper surface rear end side of the optical engine storage housing | casing 12. FIG. Explanatory drawing which shows the example at the time of rotating the left-right angle adjustment knob 45 clockwise. Sectional drawing which shows the projection apparatus which concerns on the 3rd Embodiment of this invention seeing from the side surface side. Explanatory drawing which shows the projection lens unit employ | adopted as the projection apparatus which concerns on the 4th Embodiment of this invention. Explanatory drawing which shows the other example of a projection apparatus.

Explanation of symbols

    DESCRIPTION OF SYMBOLS 10 ... Projector body housing | casing, 12 ... Optical engine storage housing | casing, 16 ... Locking part, 17 ... Supporting part, 20 ... Nut, 21 ... Screw part, 22 ... Vertical angle adjustment knob, 31, 32 ... Gear, 33 ... Shaft, 35 ... Horizontal angle adjustment knob.

Claims (9)

The main body housing,
An optical engine is housed, and is arranged so as to be rotatable around one or more rotation shafts having a predetermined positional relationship with the main body housing, and projecting light from the optical engine in an arbitrary direction. A projection apparatus comprising a housing for accommodating an optical engine. The one or more rotation shafts extend in three directions around a spherical support member,
The projection apparatus according to claim 1, wherein the optical engine housing case is rotatably supported by the support member fixed to the main body case and disposed in the main body case. The one or more rotation axes are a first axis orthogonal to a vertical plane including a longitudinal axis of the main body casing and a second axis orthogonal to a vertical plane including a horizontal axis of the main body casing. Including an axis,
A first mechanism attached to the main body casing and configured to rotate the optical engine storage casing about the first axis;
The projection apparatus according to claim 2, further comprising: a second mechanism that is attached to the main body housing and rotates the optical engine housing housing around the second axis. The one or more rotation axes include a first axis orthogonal to a vertical plane including an axis in the front-rear direction of the main body casing, and a third axis orthogonal to a horizontal plane,
A first mechanism attached to the main body casing and configured to rotate the optical engine storage casing about the first axis;
The projection apparatus according to claim 2, further comprising: a third mechanism that is attached to the main body casing and rotates the optical engine housing casing about the third axis. The one or more rotation axes are a first axis orthogonal to a vertical plane including a longitudinal axis of the main body casing and a second axis orthogonal to a vertical plane including a horizontal axis of the main body casing. An axis and a third axis orthogonal to the horizontal plane,
A first mechanism provided in the main body casing and configured to rotate the optical engine storage casing about the first axis;
A second mechanism provided in the main body casing and configured to rotate the optical engine storage casing about the second axis;
The projection apparatus according to claim 2, further comprising: a third mechanism that is attached to the main body casing and rotates the optical engine housing casing about the third axis. Having a middle housing that is housed in the main body housing and houses the optical engine housing housing;
The third mechanism is configured by rotatably supporting the middle casing on the third shaft attached to the main body casing,
The first mechanism is configured by rotatably supporting the optical engine housing casing on the first shaft attached to the inner casing,
The projection according to claim 5, wherein the second mechanism is configured by rotatably supporting the optical engine storage housing on the second shaft attached to the inner housing. apparatus. The first to third mechanisms include a first gear attached to the optical engine housing case,
7. The apparatus according to claim 3, further comprising: a second gear that is connected to an operation unit provided outside the main body housing and meshes with the first gear. 8. Projection device.   The first to third mechanisms are connected to an operation unit provided outside the main body casing, and a screw part that presses a part of the optical engine housing casing with a protruding amount according to the operation of the operation unit. The projection apparatus according to claim 3, wherein the projection apparatus is configured. A projection lens unit that houses a projection lens on which light to be projected is incident;
A support mechanism for rotatably supporting the projection lens unit so that the direction of the optical axis of the projection lens is tilted about the optical center of the projection lens, and for changing the direction of light emitted from the projection lens; A projection apparatus characterized by that.

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