JP7013641B2 - projector - Google Patents

Description

The present invention relates to a projector.

Conventionally, a light source device, a light modulation device that modulates the light emitted from the light source device to form an image according to image information, and a projection optical device that projects the formed image onto a projected surface such as a screen. And, a projector equipped with is known. As such a projector, a projector (projection) provided with a shift adjustment unit that supports a projection optical device and adjusts the projection position of an image by moving the projection optical device in a direction orthogonal to the optical axis of the projection optical device. (Type display device) is known (see, for example, Patent Document 1).

In the projector described in Patent Document 1, the shift adjusting unit includes a first moving member to which a projection optical device (projection lens) is fixed and a second moving member that holds the first moving member so as to be movable in the left-right direction. And a fixing member that holds the second moving member so as to be movable in the vertical direction. Then, when the corresponding dial is rotated, the first moving member is located on opposite sides of the first moving member so as to sandwich the first moving member, and the first moving member is located along the first guide bar and the second guide bar along the left-right direction, respectively. Moves left and right. Further, when the corresponding dial is rotated, the second movement is also performed along the third guide bar and the fourth guide bar, which are located on opposite sides of each other so as to sandwich the second movement member and which are along the vertical direction, respectively. The member moves up and down.

Among these, the first moving member includes a correction mechanism for correcting the image plane inclination of the projection lens, and the correction mechanism includes a first engaging member, an elastic member, an adjusting screw, and a second engaging member.
The first engaging member is provided at the end of the first moving member on the side opposite to the first guide bar side, and the first engaging member has a hole through which the adjusting screw is inserted. Further, the elastic member is a spring through which the shaft of the adjusting screw penetrates, and is arranged between the first engaging member and the second engaging member. The second engaging member has a guide portion that the first engaging member is slidably engaged with, and an engaging portion that engages with the second guide bar.
Then, when the adjusting screw is rotated, the distance between the first engaging member and the second engaging member in the direction along the optical axis changes due to the elastic force of the elastic member and the pressure applied by the adjusting screw. As a result, the first moving member rotates slightly around the first guide bar, and the projection optical device tilts. As a result, the inclination of the image plane of the projection optical device is adjusted, and the one-sided blur of the projected image is adjusted.

Japanese Unexamined Patent Publication No. 2015-200792

However, in the projector described in Patent Document 1, the first moving member is moved in the left-right direction and is rotated about the first guide bar. Since this first guide bar is engaged with the end portion of the first moving member, the back focus position of the projection optical device is displaced when the first moving member and, by extension, the projection optical device are tilted. Therefore, there is a possibility that the light modulated by the optical modulator cannot be properly projected by the projection optical device.

An object of the present invention is to solve at least a part of the above problems, and one of the objects is to provide a projector capable of appropriately performing projection by a projection optical device after position adjustment.

The projector according to one aspect of the present invention includes a light source device, an optical modulation device that modulates the light emitted from the light source device, and a projection optical device that projects the modulated light that is modulated and incident by the light modulation device. The adjusting device includes an adjusting device that supports the projection optical device and adjusts the position of the projection optical device, and the adjusting device has a direction along the central axis of the projection optical device as a first direction and is the first direction. When the two directions orthogonal to each other and orthogonal to each other are the second direction and the third direction, the light rotates about the first rotation axis along the second direction and orthogonal to the central axis. The projection optical device is configured to be movable by moving along one of the second direction and the third direction with the first rotating member configured to rotate the projection optical device. It is characterized by including a first moving member.

According to such a configuration, the first rotation axis of the first rotation member is along the second direction and orthogonal to the central axis of the projection optical device supported by the adjustment device. According to this, even when the first rotating member is rotated to rotate the projection optical device, the movement of the end portion of the modulated light in the projection optical device on the incident side (hereinafter referred to as the light incident side) is observed. It can be made smaller. Therefore, it is possible to suppress the deviation of the back focus position of the projection optical device, and it is possible to easily position the optical modulation device within the allowable range of the back focus position of the projection optical device. Therefore, when the projection optical device is tilted with respect to the central axis of the modulated light incident on the projection optical device by the first rotating member, or when the projection optical device is moved to the above one by the first moving member. However, it is possible to appropriately project the modulated light by the projection optical device after the position adjustment.

In the above aspect, it is preferable that one of the first rotating member and the first moving member supports the other member.
According to such a configuration, the first rotating member and the first moving member can be integrated. Therefore, the configuration of the adjusting device can be simplified and miniaturized as compared with the case where the first rotating member and the first moving member are supported on one and the other surfaces of the supporting member, respectively.

In the above aspect, the first moving member supports the first rotating member, and the first moving member receives the modulated light incident on the projection optical device with respect to the first rotating member. It is preferably located on the incident side of.
Here, when the first rotating member rotatable about the first rotating shaft supports the first moving member so as to be movable in a third direction orthogonal to the first rotating shaft, the first moving member is said to be movable. When one rotating member is rotated, the amount of movement of the first moving member when the adjusting device is viewed along the first direction differs depending on the amount of rotation (rotation angle) of the first rotating member. ..
On the other hand, according to the above configuration, the first moving member rotatably supports the first rotating member. Therefore, even if the first moving member is moved in a state where the first rotating member is rotated, the first moving member can be moved by the amount of the movement when viewed along the first direction. It is moved in the direction of movement. According to this, the movement amount of the first moving member and the rotation amount of the second rotating member can be controlled independently. Therefore, the position of the projection optical device can be easily adjusted to a desired position.
Further, since the first moving member that supports the first rotating member is located on the light incident side with respect to the first rotating member, it is provided on the first rotating member or the first rotating member. When the configuration supports the projection optical device, it is possible to prevent the back focus position from shifting along the first direction even if the first moving member is moved. Therefore, it is possible to appropriately project the modulated light by the projection optical device after the position adjustment.

In the above aspect, the second rotating member configured to rotate the projection optical device along the third direction and about a second rotating axis orthogonal to the central axis. And a second moving member configured to move the projection optical device along the other of the second direction and the third direction so as to be movable.
With such a configuration, the adjustment axis of the projection optical device can be increased. Therefore, the projection optical device can be arranged at a more appropriate position.

In the above aspect, the second moving member, the first moving member, the first rotating member, and the first rotating member are in this order from the incident side of the modulated light that is incident on the projection optical device and passes through the projection optical device. It is preferable that two rotating members are arranged.
Here, the first rotating member and the second rotating member that rotate the projection optical device around the first rotating shaft and the second rotating shaft illuminate the first moving member and the second moving member. When it is located on the incident side, the back focus position of the projection optical device may shift to the light emitting side as described above.
On the other hand, by arranging the first moving member and the second moving member on the light incident side with respect to the first rotating member and the second rotating member, it is possible to suppress the back focus position from shifting to the light emitting side. Therefore, the projected optical device after adjusting the position can appropriately project the modulated light.

In the above aspect, among the first rotating member, the second rotating member, the first moving member, and the second moving member, the modulation that is incident on the projection optical device and passes through the projection optical device. It is preferable that the member located closest to the emission side in the traveling direction of the light has a locking member for locking the projection optical device.
Here, since the projection optical device projects the modulated light (image) on the projected surface, the lens on the light emitting side is generally exposed to the outside of the outer housing. On the other hand, on the light incident side with respect to the projection optical device, optical components such as a light modulation device that forms an image are generally densely arranged. Therefore, when replacing the projection optical device, it is conceivable to pull the projection optical device out of the exterior housing toward the light emitting side.
However, when the locking member for locking the projection optical device is provided on the member located on the light incident side, the extraction of the projection optical device to the light emitting side tends to be complicated, and eventually, the projection optical device The replacement work tends to be complicated.
On the other hand, according to the above configuration, the projection optical device can be easily pulled out from the adjusting device to the light emitting side. Therefore, the replacement work of the projection optical device can be simplified.

In the above aspect, the first drive device for rotating the first rotating member, the second drive device for rotating the second rotating member, and the third drive device for moving the first moving member. The adjusting device includes a fourth driving device for moving the second moving member, and the adjusting device is formed in a substantially quadrangular shape having four edges when viewed along the first direction. It is preferable that the drive device, the second drive device, the third drive device, and the fourth drive device are arranged according to different edges of the four edges.
According to such a configuration, it is possible to prevent the rotating member and the component for rotating or moving the moving member from interfering with each other in each drive device. The movement and the movement of each of the first moving member and the second moving member can be reliably performed, and the position adjustment of the projection optical device can be appropriately and reliably performed.
In addition, since each drive device can be arranged in a well-balanced manner in the adjusting device, it is possible to reduce the size of the adjusting device having two rotating members and two moving members.

The perspective view which shows the appearance of the projector which concerns on one Embodiment of this invention. The schematic diagram which shows the structure of the image forming apparatus in the said embodiment. A perspective view of the adjusting device in the above embodiment as viewed from the light emitting side. The figure which looked at the adjustment device in the said embodiment from the light emitting side. The figure which looked at the adjustment device in the said embodiment from the light incident side. The exploded perspective view which shows the adjustment apparatus in the said embodiment. The perspective view which shows the 1st rotating member supported by the 2nd rotating member in the said embodiment. A perspective view of the first rotating member in the above embodiment as viewed from the light emitting side. FIG. 3 is a perspective view of the first rotating member in the above embodiment as viewed from the light incident side. The perspective view which shows the 2nd rotating member supported by the 1st moving member in the said embodiment. A perspective view of the second rotating member in the above embodiment as viewed from the light emitting side. A perspective view of the second rotating member in the above embodiment as viewed from the light incident side. The perspective view which shows the 1st moving member supported by the 2nd moving member in the said embodiment. A perspective view of the first moving member in the above embodiment as viewed from the light emitting side. FIG. 3 is a perspective view of the first moving member in the above embodiment as viewed from the light incident side. The perspective view which shows the 2nd moving member supported by the support member in the said embodiment. A perspective view of the second moving member in the above embodiment as viewed from the light emitting side. FIG. 3 is a perspective view of the second moving member in the above embodiment as viewed from the light incident side. The perspective view of the support member in the said embodiment as seen from the light emitting side. The perspective view of the support member in the said embodiment as seen from the light incident side. A perspective view of the first drive device in the above embodiment as viewed from the light emitting side. The perspective view of the 1st drive device in the said embodiment as seen from the light incident side. The exploded perspective view which shows the 1st drive device in the said embodiment. The exploded perspective view which shows the 1st drive device in the said embodiment. FIG. 3 is a cross-sectional view showing a first rotating member and a first driving device in the above embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Outline configuration of projector]
FIG. 1 is a perspective view showing the appearance of the projector 1 according to the present embodiment.
The projector 1 according to the present embodiment modulates the light emitted from the light source device 41 (see FIG. 2) provided inside to form an image corresponding to the image information, and the image is projected on a surface such as a screen. It is an image display device that magnifies and projects upward. As shown in FIG. 1, the projector 1 includes an exterior housing 2 constituting the exterior and a device main body 3 (see FIG. 2) housed in the exterior housing 2.
Further, as will be described in detail later, the projector 1 includes an adjusting device 5 capable of adjusting the position of the projection optical device 46 described later to adjust the projection position of the image by the projection optical device 46, and the adjusting device 5 is provided with the adjusting device 5. The projection optical device 46 is configured to be movable along two axes orthogonal to the central axis of the projection optical device 46, and the projection optical device 46 is centered on each of the two rotation axes along the two orthogonal axes. It is one of the features that it is configured to be rotatable.
Hereinafter, each configuration of the projector 1 will be described.

[Structure of exterior housing]
The exterior housing 2 includes an upper case 2A constituting the upper portion of the exterior housing 2, a lower case 2B constituting the lower portion, a front case 2C constituting the front portion, and a rear case 2D constituting the rear portion. , And these are combined to form an overall rectangular parallelepiped shape. The exterior housing 2 has a top surface portion 21, a bottom surface portion 22, a front surface portion 23, a back surface portion 24, a left side surface portion 25, and a right side surface portion 26.

An opening 211 for inserting and removing a light source device 41, which will be described later, is formed at positions on the back surface portion 24 side and the left side surface portion 25 side of the top surface portion 21, and the opening portion 211 is slidably provided on the left side surface portion 25 side. It is blocked by the lamp cover 212.
The bottom surface portion 22 is provided with a leg portion 221 that is in contact with the installation surface (only one leg portion 221 is shown in FIG. 1).
An opening 231 through which an image projected by a projection optical device 46 described later passes is formed in substantially the center of the front portion 23. Further, an intake port 232 is formed in a portion of the front surface portion 23 on the right side surface portion 26 side, and an exhaust port 233 is formed in a portion on the left side surface portion 25 side.

[Configuration of device body]
FIG. 2 is a schematic view showing the configuration of the image forming apparatus 4 included in the apparatus main body 3.
The device main body 3 constitutes the main body of the projector 1. The apparatus main body 3 includes an image forming apparatus 4 shown in FIG. In addition, although not shown, the apparatus main body 3 includes a control device for controlling the operation of the projector 1, a power supply device for supplying electric power to electronic components constituting the projector 1, and a cooling target among the configurations of the projector 1. It is equipped with a cooling device for cooling.

[Structure of image forming apparatus]
The image forming apparatus 4 forms and projects an image according to the image information under the control of the control apparatus. The image forming apparatus 4 includes a light source device 41, an illumination optical device 42, a color separation device 43, a relay device 44, an electro-optical device 45, a projection optical device 46, an optical component housing 47, and an adjusting device 5. Combined, they are configured as a substantially L-shaped optical unit along the back surface portion 24 and the right side surface portion 26 (see FIG. 1 respectively).

The light source device 41 emits light in the + X direction toward the illumination optical device 42. The light source device 41 includes a light emitting tube 411, a main reflecting mirror 412, a parallelizing lens 413, and an accommodating body 414.
The illumination optical device 42 equalizes the illuminance in the plane orthogonal to the central axis of the light flux emitted from the light source device 41. The illumination optical device 42 includes a cinema filter 421, a first lens array 422, a dimming device 423, a second lens array 424, a polarization conversion element 425, and a superimposing lens 426 in the order of incident light flux from the light source device 41.

The color separation device 43 separates the light flux incident from the illumination optical device 42 into three color lights of red (R), green (G), and blue (B). The color separator 43 includes a dichroic mirror 431, 432 and a reflection mirror 433.
The relay device 44 is provided on the optical path of red light having a longer optical path than the other colored light among the three separated colored lights. The relay device 44 has an incident side lens 441, a relay lens 443, and a reflection mirror 442,444.

The electro-optic device 45 modulates each of the separated colored lights according to the image information, and then synthesizes the respective colored lights. The electro-optical device 45 has a field lens 451 provided for each color light, an incident side polarizing plate 452, and a liquid crystal panel 453 as an optical modulator (the red, green, and blue liquid crystal panels are 453R, 453G, and 453B, respectively. ), The emitting side polarizing plate 454, and a cross dichroic prism 455 as a color synthesizing device for synthesizing each modulated color light (modulated light) to form a projected image.
The projection optical device 46 magnifies and projects the incident projected image (modulated light modulated by the liquid crystal panel 453), and displays the projected image on the projected surface. The projection optical device 46 is configured as a set lens including a plurality of lenses (not shown) and a lens barrel 461 for accommodating the plurality of lenses inside.

Although not shown in detail, the optical component housing 47 includes a component storage member in which the above-mentioned optical component is arranged, and a lid-shaped member combined with the component storage member.
An illumination optical axis Ax, which is a design optical axis, is set in such an optical component housing 47, and each of the above devices 41 to 46 is arranged at a predetermined position on the illumination optical axis Ax. The light source device 41 is arranged so that the illumination optical axis Ax and the central axis of the light emitted from the light source device 41 coincide with each other.

[Configuration of adjustment device]
FIG. 3 is a perspective view of the adjusting device 5 as viewed from the light emitting side. 4 and 5 are views of the adjusting device 5 as viewed from the light emitting side and the light incident side, respectively. Further, FIG. 6 is an exploded perspective view of the adjusting device 5 as viewed from the light emitting side. Since the rotation axes RX and RY are displaced in the + Z direction, which will be described later, they do not seem to intersect the central axis CX of the projection optical device 46 in FIG. 3, which is a perspective view, but these rotation axes RX. , RY, as shown in FIGS. 4 and 5, are orthogonal to the central axis CX when viewed from the + Z direction side, respectively.
The adjusting device 5 is fixed to the inner surface of the outer housing 2 (specifically, the inner surface of the bottom surface portion 22), supports the lens barrel 461 (see FIG. 2) of the projection optical device 46, and moves the lens barrel 461. Therefore, the projection position of the image by the projection optical device 46 is adjusted. More specifically, the adjusting device 5 has a second direction (corresponding to one of the + X direction and the + Y direction described later) and a second direction orthogonal to the first direction (corresponding to the + Z direction described later) along the central axis of the projection optical device 46. The projection optical device 46 is rotated around two rotation axes RX and RY along each of the three directions (corresponding to the other in the + X direction and + Y direction described later), and is modulated by the liquid crystal panel 453 as an optical modulator. It has a function of adjusting the inclination of the projection optical device 46 with respect to the modulated light incident on the ground.
As shown in FIGS. 3 to 6, such an adjusting device 5 includes a first rotating member 51, a second rotating member 52, a first moving member 53, a second moving member 54, and a second rotating member 51 that supports the lens barrel 461. The support member 55 includes a first drive device 61, a second drive device 62, a third drive device 63, and a fourth drive device 64. Then, from the incident side to the exit side of the light passing through the projection optical device 46, the support member 55, the second moving member 54, the first moving member 53, the second rotating member 52, and the first rotating member 51 They are arranged in order.

In the following description, the traveling direction of the modulated light passing through the projection optical device 46 along the illumination optical axis Ax is defined as the + Z direction. This + Z direction is a direction along the central axis CX of the projection optical device 46. Of the two directions orthogonal to the + Z direction and orthogonal to each other, the direction from the bottom surface portion 22 side to the top surface portion 21 side is the + Y direction, and the direction from the left side surface portion 25 side to the right side surface portion 26 side is the + X direction. And. Then, the direction opposite to the + Z direction is defined as the −Z direction. The same applies to the −X direction and the −Y direction. That is, in a certain configuration, the light incident side is the −Z direction side, and the light emitting side is the + Z direction side.

[Structure of the first rotating member]
FIG. 7 is a perspective view of the first rotating member 51 supported by the second rotating member 52 as viewed from the light emitting side. Further, FIG. 8 is a perspective view of the first rotating member 51 as viewed from the light emitting side.
The first rotating member 51 is supported by the second rotating member 52 while supporting the lens barrel 461. The first rotating member 51 rotates about a rotation axis RX (see FIGS. 3 to 5) orthogonal to the central axis CX of the projection optical device 46 along the + X direction and is inclined with respect to the XY plane. As a result, the projection optical device 46 is tilted with respect to the XY plane to adjust the tilt of the projection optical device 46 with respect to the illumination optical axis Ax. As shown in FIGS. 7 and 8, such a first rotating member 51 is formed in a substantially pentagonal shape that is line-symmetrical with respect to a center line along the + Y direction orthogonal to the central axis CX.

A circular opening 511 through which the lens barrel 461 is inserted is formed in the center of the first rotating member 51.
In the first rotating member 51, on the end surface 51A on the light emitting side (+ Z direction side), an accommodating recess 512 concentric with the opening 511 is formed around the opening 511 so as to be recessed in the −Z direction side. Has been done. A locking member 513 for locking the lens barrel 461 is fixed to the accommodating recess 512 with a screw.

The locking member 513 sandwiches the annular rotating member 5131 that can rotate along the edge of the opening 511 about the + Z direction and the rotating member 5131 between the first rotating member 51. It has an annular holding member 5135 and a gripping member 5138.
Of these, the sandwiching member 5135 has a circular opening 5136 in the center and four notches 5137 at the inner edge of the opening 5136.
The rotating member 5131 has an opening 5132 and four notches 5133 similar to the opening 5136 and the four notches 5137. In addition, the rotating member 5131 has a lever portion 5134 protruding in the + Y direction at the end on the + Y direction side.
Further, the grip member 5138 is attached in the vicinity of the lever portion 5134.

On the other hand, the end surface 51A is formed with a substantially trapezoidal recess 514 that is recessed in the −Z direction at a position corresponding to the four notches 5137. These recesses 514 are exposed when the lever portion 5134 is operated to rotate the rotating member 5131 to one side, and are formed in the lens barrel 461 when the lens barrel 461 is inserted into the opening 511. A protrusion (not shown) is inserted. In this state, when the rotating member 5131 is rotated to the other side, each protruding portion is covered with the rotating member 5131, whereby the lens barrel 461 is locked to the first rotating member 51. Although not shown, the locking member 513 has an urging member that urges the rotating member 5131 to the other side (direction in which the lens barrel 461 is locked), whereby the lens barrel 461 is engaged. The state of being locked to the stop member 513 is maintained.

FIG. 9 is a perspective view of the first rotating member 51 as viewed from the light incident side.
As shown in FIG. 9, the end surface 51B on the light incident side (-Z direction side) of the first rotating member 51 is at a symmetrical position with respect to a virtual line passing through the center of the opening 511 along the + Y direction. , Two recesses 515 extending radially outward of the opening 511 are formed from the edge of the opening 511. Each of these recesses 515 is provided with a pressing member 516 that presses the lens barrel 461 inserted in the opening 511 inward in the radial direction of the opening 511.

As shown in FIGS. 8 and 9, a rotation shaft portion 517 is projected from the substantially center of each of the end surface 51C on the + X direction side and the end surface 51D on the −X direction side of the first rotating member 51. .. These rotation shaft portions 517 are portions that are inserted into the support member SM provided in the second rotation member 52 and constitute the rotation shaft RX of the first rotation member 51.

The portion of the first rotating member 51 on the −Y direction side has a tapered shape in which the dimension in the + X direction decreases toward the −Y direction, and the tip portion of the portion on the −Y direction side is approximately half. An oval-shaped protrusion 518 is formed.
The protrusion 518 has a circular through hole 5181 that penetrates the protrusion 518 along the + Z direction, and a concentric stepped portion 5182 formed around the through hole 5181. That is, the protruding portion 518 has a stepped hole 5183 composed of a through hole 5181 and a stepped portion 5182. Of these, the shaft member 615 constituting the first drive device 61, which will be described later, is inserted into the through hole 5181, and the urging member 617 also constituting the first drive device 61 is brought into contact with the stepped portion 5182. To. Such a first drive device 61 will be described in detail later.

[Structure of the second rotating member]
FIG. 10 is a perspective view of the second rotating member 52 supported by the first moving member 53 as viewed from the light emitting side. 11 and 12 are perspective views of the second rotating member 52 as viewed from the light emitting side and the light incident side, respectively.
The second rotating member 52 rotatably supports the first rotating member 51 around the rotating shaft RX, and is rotatably supported by the first moving member 53. The second rotating member 52 rotates about a rotation axis RY (see FIGS. 3 to 5) orthogonal to the central axis CX along the + Y direction and is inclined with respect to the XY plane. The projection optical device 46 is tilted with respect to the XY plane to adjust the tilt of the projection optical device 46 with respect to the illumination optical axis Ax. As shown in FIGS. 10 to 12, such a second rotating member 52 is formed in a substantially rectangular shape.

An opening 521 is formed at substantially the center of the second rotating member 52. The opening 521 has a shape in which a circular shape and a cross shape extending from the center of the circular shape toward the four corners of the rectangular second rotating member 52 are combined. A lens barrel 461 locked to the first rotating member 51 by the locking member 513 is inserted into the opening 521 along the + Z direction. Further, in the cross-shaped portion of the opening 521, the pressing member 516 (see FIG. 9) is located at a portion on the + Y direction side, respectively.

As shown in FIGS. 10 and 11, two support members SM form an opening 521 on the −X direction side and the + X direction side on the end surface 52A on the light emitting side (+ Z direction side) of the second rotating member 52. It is provided so as to be sandwiched from.
Each of these support members SM has the same shape, and has a structure in which the fixing portion SM1 fixed to the fixing target and the support portion SM2 supporting the support target are combined by screws. Of these, the support portion SM2 has a hole portion SM3 that penetrates the support portion SM2 along the thickness direction. When the support member SM is fixed to the second rotating member 52, the fixing target is the end face 52A, and the support target is the first rotating member 51. When the support member SM is fixed to the first moving member 53, which will be described later, the fixing target is the end face 53A, and the support target is the second rotating member 52.
Of the support member SM fixed to the end surface 52A, the rotation shaft portion 517 (protruding from the end surface 51D of the first rotation member 51) is provided in the hole portion SM3 of the support member SM located on the −X direction side. (See FIGS. 8 and 9) is inserted into the hole SM3 of the support member SM located on the + X direction side, and the rotation shaft portion 517 (FIG. 8) projecting from the end surface 51C of the first rotation member 51. And FIG. 9) are inserted. As a result, the first rotating member 51 is rotatably supported with respect to the second rotating member 52.

In the second rotating member 52, a rotating shaft portion 522 projects from the center of each of the end surface 52E on the + Y direction side and the end surface 52F on the −Y direction side. These rotation shaft portions 522 are supported by the first moving member 53 and constitute a rotation shaft RY of the second rotation member 52.
Further, a protruding portion 523 protruding in the −Y direction is formed at each end of the end surface 52F on the + X direction side and the −X direction side. A first drive device 61 for rotating the first rotation member 51 is attached to these protrusions 523.

In the second rotating member 52, a protruding portion 524 protruding in the −X direction is provided at substantially the center of the end surface 52D on the −X direction side. The protruding portion 524 is formed in a substantially semi-elliptical shape as in the case of the protruding portion 518 when viewed from the + Z direction side. Such a protrusion 524 has a stepped hole 5243 composed of a circular through hole 5241 penetrating along the + Z direction and a concentric stepped portion 5242 formed around the through hole 5241. ..
Of these, the shaft member 625 constituting the second drive device 62 for rotating the second rotating member 52 is inserted through the through hole 5241, and the second drive device 62 is also configured in the stepped portion 5242. The urging member (not shown) is abutted. The second drive device 62 will be described in detail later.

[Structure of the first moving member]
FIG. 13 is a perspective view of the first moving member 53 supported by the second moving member 54 as viewed from the light emitting side. 14 and 15 are perspective views of the first moving member 53 as viewed from the light emitting side and the light incident side, respectively.
The first moving member 53 is a member that rotatably supports the second rotating member 52 and is supported by the second moving member 54 so as to be able to move linearly (linear motion). That is, the first moving member 53 is also a support member for the second rotating member 52. The first moving member 53 is moved along the + Y direction by the third driving device 63 described later, whereby the amount of deviation of the central axis of the projection optical device 46 with respect to the illumination optical axis Ax, and thus the projected surface. Adjust the position of the projected image.
As shown in FIGS. 13 to 15, such a first moving member 53 is formed in a substantially rectangular plate shape when viewed along the + Z direction, and has a circular shape in the center of the first moving member 53. The opening 531 is formed. Similar to the above, the lens barrel 461 supported by the first rotating member 51 is inserted into the opening 531.

As shown in FIGS. 13 and 14, the opening 531 is sandwiched between the end surface 53A on the light incident side (+ Z direction side) of the first moving member 53 from the + Y direction side and the −Y direction side. The support member SM is arranged.
Of these two support member SMs, the rotation shaft portion 522 projecting from the end surface 52E of the second rotation member 52 is inserted into the hole portion SM3 of the support member SM on the + Y direction side, and is inserted in the −Y direction. A rotation shaft portion 522 projecting from the end surface 52F is inserted into the hole portion SM3 of the support member SM on the side. As a result, the second rotating member 52 is rotatably supported with respect to the first moving member 53.

Protruding portions 532 projecting in the −X direction are formed at the respective portions on the + Y direction side and the −Y direction side of the end surface 53D on the −X direction side of the first moving member 53, respectively. A second drive device 62 for rotating the second rotating member 52 is attached to these protrusions 532.
On the other hand, a protrusion 533 protruding in the + X direction is provided at a portion on the + Y direction side of the end surface 53D on the + X direction side. The protrusion 533 is formed with a recess 534 that is recessed in the −Z direction and opens in the + X direction and the + Z direction. A moving piece 635 of the third drive device 63, which will be described later, is inserted into the recess 534.

Further, as shown in FIGS. 13 to 15, a slide rail SR (specifically, an inner rail SR1) is attached to the center of each of the end face 53C and the end face 53D.
The slide rail SR includes an inner rail SR1 and an outer rail SR2 that are combined so as to face each other in the thickness direction. The inner rail SR1 and the outer rail SR2 are configured to be relatively linearly movable with each other, and a rolling element (not shown) such as a ball is accommodated between the rails SR1 and SR2. In such a slide rail SR, when one of the inner rail SR1 and the outer rail SR2 slides linearly with respect to the other rail, the rolling element transfers the rolling element rolling surface. , The track member is configured so that the sliding resistance of one rail with respect to the other rail is reduced so that the one rail can be smoothly moved.
Since the longitudinal dimension of the inner rail SR1 is smaller than the longitudinal dimension of the outer rail SR2, the inner rail SR1 can move along the longitudinal direction within the range within the longitudinal dimension of the outer rail SR2. Is. Such an inner rail SR1 is fixed to a fixing target (for example, a first moving member 53) by a screw (not shown), and the outer rail SR2 is connected to a connecting target (for example, a second moving member) by a connecting member CM as shown in FIG. 54) is linked.

As shown in FIG. 15, two recesses 535 and 536 are formed on the end surface 53B of the first moving member 53 on the light incident side (-Z direction side) at the position on the + X direction side.
A sliding member 543 attached to the second moving member 54 is arranged in the recess 535 located on the + Y direction side. The sliding member 543 abuts on the edges of the recess 535 on the + X direction side and the −X direction side, thereby stabilizing the linear motion of the first moving member 53 along the + Y direction.

The recess 536 located on the −Y direction side is formed in a substantially rectangular shape whose longitudinal direction is along the + Y direction, similarly to the recess 535. The dimension of the recess 536 along the + X direction is the same as that of the recess 535, but the dimension along the + Y direction is larger than the recess 535. A fixing member 537 is attached to the end portion of the recess 536 on the −Y direction side. The end portion of the compression coil spring SP1 as an urging member, which is also arranged in the recess 536, is brought into contact with the fixing member 537 on the −Y direction side. On the other hand, the end portion of the compression coil spring SP1 on the + Y direction side is in contact with the fixing member 545 fixed to the second moving member 54.
By such a compression coil spring SP1, the first moving member 53 is urged toward the second moving member 54 in the −Y direction, whereby, as shown in FIG. 13, the second moving member 54 is urged. It is possible to prevent a gap from being generated between the moving piece 635 of the third drive device 63 to be fixed and the edge of the recess 534 (the edge on the + Y direction side).

[Structure of second moving member]
FIG. 16 is a perspective view of the second moving member 54 supported by the support member 55 as viewed from the light emitting side. 17 and 18 are perspective views of the second moving member 54 as viewed from the light emitting side and the light incident side, respectively.
The second moving member 54 movably supports the first moving member 53 along the + Y direction, and is directly supported by the support member 55. The second moving member 54 is moved along the + X direction by the fourth driving device 64, whereby the amount of deviation of the central axis of the projection optical device 46 with respect to the illumination optical axis Ax, and by extension, the projected image on the projected surface. Adjust the position of.
As shown in FIGS. 16 to 18, such a second moving member 54 is formed in a substantially rectangular plate shape, and an oval-shaped opening having a major axis along the + Y direction is formed in the center of the second moving member 54. 541 is formed. A lens barrel 461 is inserted through the opening 541 in the same manner as described above.
Further, a substantially rectangular opening 542 is formed in the portion of the second moving member 54 on the + X direction side and on the −Y direction side. As shown in FIG. 16, a moving piece 645 of the fourth drive device 64 attached to the support member 55 is inserted into the opening 542. When the moving piece 645 moves in the −X direction side or the + X direction side, the second moving member 54 is directly moved in the −X direction side or the + X direction side with respect to the support member 55.

As shown in FIGS. 16 and 17, on the end surface 54A on the light emitting side (+ Z direction side) of the second moving member 54, the sliding member 543 is located at a position on the + X direction side and on the + Y direction side. In addition to the provision, a substantially rectangular recess 544 long in the + Y direction is formed at a position on the + X direction side and the −Y direction side. The recess 544 faces the recess 536, and a part of the compression coil spring SP1 (see FIG. 15) on the −Z direction side is arranged in the recess 544. Further, a fixing member 545 to which the end portion of the compression coil spring SP1 on the + Y direction side is abutted is fixed to the end portion on the + Y direction side in the recess 544.

Recesses 54C1 and 54D1 recessed in the center of the second moving member 54 are formed in substantially the center of the end surface 54C on the + X direction side and the end surface 54D on the −X direction side of the second moving member 54, and these recesses 54C1 are formed. , The slide rail SR to which the inner rail SR1 is attached to the first moving member 53 is arranged in each of the 54D1.
Further, the connecting member CM connected to the outer rail SR2 of the slide rail SR is fixed to the outer portion of the recesses 54C1 and 54D1 in the end faces 54C and 54D. As a result, the first moving member 53 is supported by the second moving member 54 so as to be linearly movable along the + Y direction.
The inner rail SR1 of the slide rail SR connected to the support member 55 via the connecting member CM is fixed at substantially the center of the end surface 54E on the + Y direction side and the end surface 54F on the −Y direction side of the second moving member 54, respectively. Rail.

As shown in FIG. 18, on the end surface 54B on the light incident side (-Z direction side) of the second moving member 54, a substantially rectangular recess 546 along the longitudinal direction in the + X direction is provided at the portion on the −Y direction side. It is formed. At the end of the recess 546 on the + X direction side, a fixing member 547 to which the end of the compression coil spring SP2 as a biasing member arranged in the recess 546 on the + X direction is abutted is attached. On the other hand, the end portion of the compression coil spring SP2 on the −X direction side is in contact with the fixing member 553 fixed to the support member 55. By such a compression coil spring SP2, the second moving member 54 is urged toward the + X direction with respect to the support member 55, whereby, as shown in FIG. 16, the second moving member 54 is fixed to the support member 55. It is possible to prevent a gap from being generated between the moving piece 645 of the drive device 64 and the edge of the opening 542 (the edge on the −X direction side).
Further, a substantially rectangular recess 548 is formed in the corner portion on the + X direction side and the + Y direction side of the end surface 54B, and the holding plate 549 in which the third drive device 63 is held is formed in the recess 548. It is attached. The third drive device 63 will be described in detail later.

[Structure of support member]
19 and 20 are perspective views of the support member 55 as viewed from the light emitting side and the light incident side, respectively.
The support member 55 is fixed to the inner surface of the bottom surface portion 22 (FIG. 1) and supports the second moving member 54 so as to be linearly movable along the + X direction. In other words, each member 51 to 54 Is to support. As shown in FIGS. 19 and 20, the support member 55 is formed in a substantially rectangular plate shape, and in the substantially center of the support member 55, an ellipse having substantially the same dimensions along the + X direction and the + Y direction, respectively. A shaped opening 551 is formed. The lens barrel 461 is inserted through the opening 551 in the same manner as described above.

As shown in FIG. 19, in the end surface 55A on the light emitting side (+ Z direction side) of the support member 55, the portion on the −Y direction side with respect to the opening 551 is a substantially rectangular recess 552 long in the + X direction. Is formed. The recess 552 faces the recess 546, and a part of the compression coil spring SP2 (see FIG. 18) on the −Z direction side is arranged in the recess 552. Further, in the recess 552, a fixing member 553 to which the end portion of the compression coil spring SP2 on the −X direction side is abutted is fixed to the end portion on the −X direction side.

As shown in FIGS. 19 and 20, recesses 55E1 and 55F1 recessed in the center of the support member 55 are formed at substantially the center of the end surface 55E on the + Y direction side and the end surface 55F on the −Y direction side of the support member 55. ing. In these recesses 55E1 and 55F1, slide rail SRs to which the inner rail SR1 is attached to the second moving member 54 are respectively arranged.
Further, on the end faces 55E and 55F, the connecting member CM connected to the outer rail SR2 of the slide rail SR is fixed at a position sandwiching the recesses 55E1 and 55F1, respectively. As a result, the second moving member 54 is supported by the support member 55 so as to be linearly movable along the + X direction.

As shown in FIG. 20, the second moving member 54 is moved to the corner portion on the + X direction side and the −Y direction side on the end surface 55B on the light incident side (−Z direction side) of the support member 55. A fourth drive device 64 is attached. As shown in FIG. 19, the moving piece 645 included in the fourth drive device 64 projects in the + Z direction through the through hole 554 formed in the corner on the + X direction side of the support member 55 on the −Y direction side. , Is inserted into the opening 542 of the second moving member 54. By moving the moving piece 645 to the + X direction side or the −X direction side, the second moving member 54 is directly moved to the + X direction side or the −X direction side with respect to the support member 55.
The through hole 554 is formed in a rectangular shape along the longitudinal direction in the + X direction, and the inner diameter along the + X direction is set to be larger than the dimension along the + X direction of the moving piece 645. The through port 554 defines the range of movement of the moving piece 645, and by extension, the range of movement of the second moving member 54 in the + X direction.

[Arrangement of each drive device]
Each drive device 61 to 64 rotates or linearly moves the corresponding member among the members 51 to 54. As shown in FIGS. 3 to 5, these drive devices 61 to 64 are arranged according to four sides in the adjustment device 5 configured in a substantially rectangular shape when viewed from the + Z direction side. Specifically, the first drive device 61 is arranged according to the side located on the −Y direction side of the two sides along the + X direction, and the second drive device 62 is arranged according to the −X of the two sides along the + Y direction. It is arranged according to the side located on the direction side. Further, the third drive device 63 is arranged according to the side located on the + Y direction side of the two sides along the + X direction, and the fourth drive device 64 is located on the + X direction side of the two sides along the + Y direction. It is arranged according to the side to be used.
Hereinafter, the configurations of these drive devices 61 to 64 will be described.

[Structure of the first drive device]
21 and 22 are perspective views of the first driving device 61 as viewed from the light emitting side and the light incident side, respectively. 23 and 24 are exploded perspective views of the first driving device 61 as viewed from the light emitting side and the light incident side, respectively.
As described above, the first drive device 61 is a drive device that is fixed to the second rotating member 52 and rotates the first rotating member 51 around the rotating shaft portion 517 (rotating shaft RX). be. As shown in FIGS. 21 to 24, the first drive device 61 includes an accommodating body 611, a motor 612, a worm 613, a worm wheel 614, a shaft member 615, a ball bearing 616, an urging member 617, a ball bearing 618, and a engaging member. It includes a stop member 619 and a plurality of screws SC1 to SC3. Of these, the configuration of the first drive device 61 excluding the motor 612 and the screws SC1 to SC3 constitutes a transmission device that rotates the first rotating member 51 by the power generated by the motor 612 as the power generator. ..

As shown in FIGS. 21 and 23, the housing body 611 is formed in a substantially W shape when viewed from the + Y direction side. The housing 611 has a fixing portion 6111, a hole portion 6112, a fixing portion 6113, a penetrating portion 6114, an arrangement portion 6115, and an opening portion 6116.
The fixing portions 6111 are provided at both ends on the + X direction side and the −X direction side, respectively. The fixing portion 6111 is formed with a hole portion 6112 through which the shaft portion SC11 of the screw SC1 can be inserted along the thickness dimension (+ Y direction) of the housing body 611. The screw SC1 through which the shaft portion SC11 has passed through these holes 6112 is fixed to the protruding portion 523 of the second rotating member 52 from the −Y direction side, so that the accommodating body 611 and eventually the first drive device 61 , Is fixed to the second rotating member 52.

The fixing portion 6113 is located at the central portion of the accommodating body 611 in the + X direction. The fixing portion 6113 is a protruding portion protruding in the −Z direction, and the motor 612 is fixed to the end surface 6113A on the + X direction side of the protruding portion by a screw SC2.
The penetrating portion 6114 is formed so as to penetrate the fixed portion 6113 along the + X direction. The spindle 6121 of the motor 612 fixed to the end surface 6113A is inserted into the penetrating portion 6114, and the spindle 6121 is inserted into the worm 613 arranged on the −X direction side with respect to the fixing portion 6113.
The arrangement portion 6115 is formed at the central portion of the accommodating body 611 in the + X direction and inside the accommodating body 611. The arrangement portion 6115 is a portion that penetrates the accommodating body 611 along the + Z direction, and the shaft member 615, the ball bearings 616, 618, and the urging member 617 are arranged inside.
The opening 6116 is formed according to the arrangement portion 6115, and exposes the shaft member 615 arranged in the arrangement portion 6115 to the + Y direction side. A protrusion 518 that engages with the shaft member 615 is inserted into the opening 6116.

The motor 612 generates a power to rotate the first rotating member 51. The motor 612 has a spindle 6121 protruding in the −X direction, and the spindle 6121 is inserted into the worm 613 through the penetrating portion 6114. Therefore, when the motor 612 is driven and the spindle 6121 is rotated, the worm 613 rotates in the same direction as the spindle 6121.
The worm wheel 614 meshes with the worm 613 to convert the rotation of the worm 613 about the axis of rotation along the + X direction into the rotation about the axis of rotation along the + Z direction. A shaft member 615 is inserted in the center of the worm wheel 614, and the shaft member 615 is rotated in the same direction as the worm wheel 614 rotates. That is, the shaft member 615 is provided coaxially with the worm wheel 614, and the rotation shaft of the shaft member 615 and the worm wheel 614 is coaxial.
A spiral groove 6151 (see FIG. 25) is formed on the outer periphery of the shaft member 615, and the shaft member 615 inserts a through hole 5181 formed in the protruding portion 518 of the first rotating member 51. ..

The ball bearing 616 is fixed to the arrangement portion 6115 of the accommodating body 611, and the shaft member 615 is inserted through the ball bearing 616. The ball bearing 616 is for rotatably arranging the shaft member 615 in the arranging portion 6115.
The urging member 617 abuts on the stepped portion 5182 of the protruding portion 518, urges the first rotating member 51 toward the −Z direction, and is inserted into the end edge of the through hole 5181 and the through hole 5181. It suppresses the formation of a gap between the shaft member 615 and the spiral groove 6151. Such an urging member 617 is configured by a compression coil spring in this embodiment.
The ball bearing 618 is for rotatably arranging the shaft member 615 in the arranging portion 6115, similarly to the ball bearing 616.
The locking member 619 is fixed to the accommodating body 611 by a screw SC3 so as to close the opening on the + Z direction side in the arrangement portion 6115. The locking member 619 presses the ball bearing 618 that abuts on the end of the urging member 617 on the + Z direction side, and causes the urging member 617 to be in contact with the stepped portion 5182 (first rotating member 51). maintain.

FIG. 25 is an enlarged view showing a cross section of the first rotating member 51 and the first driving device 61.
In such a first drive device 61, as shown in FIG. 25, a through hole of the first rotating member 51 urged in the −Z direction side by the urging member 617 in the spiral groove 6151 of the shaft member 615. The edge of the 5181 is fitted. Further, the first rotating member 51 is supported by the second rotating member 52 in a state where rotation about the rotation axis along the + Z direction is restricted.
Therefore, the motor 612 is driven, the rotation of the spindle 6121 along the + X direction is transmitted to the shaft member 615 via the worm 613 and the worm wheel 614, and when the shaft member 615 rotates, the through hole 5181 is formed. The protruding portion 518 is moved to the + Z direction side.

Here, the first rotating member 51 is supported by the second rotating member 52 by the rotating shaft portion 517 constituting the rotating shaft RX (see FIG. 3). Therefore, the first rotating member 51 rotates about the rotation axis RX, whereby the projection optical device 46 (lens barrel 461) is tilted with respect to the XY plane.
On the other hand, when the rotation of the spindle 6121 is in the opposite direction, the shaft member 615 rotates in the opposite direction, and the protrusion 518 is moved to the −Z direction side. As a result, the first rotating member 51 rotates about the rotation axis RX in the direction opposite to the above, and the projection optical device 46 (lens barrel 461) is tilted with respect to the XY plane.

[Structure of the second drive device]
As described above, the second drive device 62 rotates the second rotating member 52 fixed to the first moving member 53 and supported by the first moving member 53 to form the rotating shaft RY. It is a drive device that rotates around a shaft portion 522 (see FIG. 11).
As shown in FIGS. 14 and 15, the second drive device 62 has the same housing body 621, motor 622, worm 623, worm wheel 624, shaft member 625, ball bearing 626, and urging as in the first drive device 61. It has a member (not shown), a ball bearing (corresponding to the ball bearing 618, not shown), a locking member 629, and screws SC1 to SC3. Of these, the configuration of the second drive device 62 excluding the motor 622 and the screws SC1 to SC3 constitutes a transmission device that rotates the second rotating member 52 by the power generated by the motor 622 as a power generator. ..

The accommodating body 621 has a fixing portion 6211, a hole portion (not shown), a fixing portion 6213, a penetrating portion 6214, an arrangement portion 6215, and an opening portion 6216, similarly to the accommodating body 611. In such a second drive device 62, the spindle 6221 of the motor 622 is arranged so as to be in the + Y direction.
Then, the protruding portion 524 (see FIGS. 11 and 12) of the second rotating member 52 is inserted into the opening 6216 from the + X direction side, and the end portion of the urging member is inserted into the stepped portion 5242 of the protruding portion 524. The shaft member 625 is inserted into the through hole 5241 so that the end edge of the through hole 5241 fits into the spiral groove of the shaft member 625 in the abutted state.

With the second drive device 62 and the second rotating member 52 combined in this way, the motor 622 is driven, and the rotation of the spindle 6221 along the + Y direction causes the shaft via the worm 623 and the worm wheel 624. When the member 625 is rotated, the protrusion 524 moves toward the + Z direction.
The second rotating member 52 is supported by the first moving member 53 by the rotating shaft portion 522 (see FIGS. 11 and 12) constituting the rotating shaft RY (see FIGS. 3 to 5). .. Therefore, the second rotating member 52 rotates about the rotation axis RY, whereby the projection optical device 46 (lens barrel 461) is tilted with respect to the XY plane.
On the other hand, when the rotation of the spindle 6221 is in the opposite direction, the shaft member 625 rotates in the opposite direction, and the protrusion 524 moves in the −Z direction side. As a result, the second rotating member 52 rotates about the rotation axis RY in the direction opposite to the above, and is tilted with respect to the XY plane of the lens barrel 461 of the projection optical device 46.

As shown in FIG. 4, when the adjusting device 5 is viewed from the light emitting side (+ Z direction side), the rotation axis RX of the first rotating member 51 and the first rotating member 51 are rotated. The shortest distance between the first drive device 61 and the shaft member 615 is the rotation shaft RY of the second rotation member 52 and the shaft member 625 of the second drive device 62 that rotates the second rotation member 52. Same as the shortest distance. Therefore, the basic structure of the first rotating member 51 and the first driving device 61 can be the same as that of the second rotating member 52 and the second driving device 62, and the motors 612 and 622 have the same degree. The rotation amount (rotation angle) of each of the first rotation member 51 and the second rotation member 52 when driven can be set to the same value. Therefore, the structure of the adjusting device 5 and the rotation amount control can be simplified.

Here, in the configuration of the first drive device 61 described above, when the amount of movement of the protruding portion 518 of the first rotating member 51 in the ± Z direction is large, the end edge of the through hole 5181 and the spiral of the shaft member 615 The groove 6151 may engage and limit further movement of the protrusion 518.
Similarly, in the configuration of the second drive device 62, when the amount of movement of the protruding portion 524 of the second rotating member 52 in the ± Z direction is large, the end edge of the through hole 5241 and the spiral groove of the shaft member 625 May engage and limit further movement of the protrusion 524.
However, in the present embodiment, since the amount of tilt adjustment of the projection optical device 46 adjusted by rotating the first rotating member 51 and the second rotating member 52 is small, the above-mentioned problems do not occur. ..

[Structure of the third drive device]
As described above, the third drive device 63 is a drive device that moves the first moving member 53 fixed to the second moving member 54 and supported by the second moving member 54 along the + Y direction. As shown in FIGS. 13, 16 and 17, the third drive device 63 includes a motor 631 as a power generator, a worm 632, a worm wheel 633, a shaft member 634, and a moving piece 635, which form a transmission device, respectively. And a first holding member 636 and a second holding member 637.

The motor 631 has a spindle 6311 arranged along the + Z direction.
The worm 632 is connected to the spindle 6311 and rotates with the spindle 6311.
The worm wheel 633 meshes with the worm 632 and rotates about the rotation axis along the + Y direction as the worm 632 rotates about the rotation axis along the + Z direction.

The shaft member 634 is inserted into the worm wheel 633 so that the central axis coincides with the rotation axis of the worm wheel 633, and rotates together with the worm wheel 633.
The moving piece 635 engages with the shaft member 634 and moves in the + Y direction side or the −Y direction side as the shaft member 634 rotates. The moving piece 635 is inserted into the recess 534 of the first moving member 53 as described above.
The first holding member 636 holds the motor 631 and the worm 632. The first holding member 636 is screwed to the second holding member 637.
The second holding member 637 rotatably supports the worm wheel 633 and the shaft member 634, and the first holding member 636 is fixed to the second holding member 637. Further, the second holding member 637 is fixed to the holding plate 549 attached to the end surface 54B of the second moving member 54.

In such a third drive device 63, when the motor 631 is driven and the spindle 6311 is rotated along the + Z direction, the rotational force of the spindle 6311 via the worm 632 and the worm wheel 633 is a shaft member along the + Y direction. It is transmitted to 634. When the shaft member 634 rotates, the moving piece 635 inserted in the recess 534 moves in the + Y direction, whereby the first moving member 53 moves in the + Y direction with respect to the second moving member 54.
On the other hand, when the motor 631 is driven and the spindle 6311 rotates in the direction opposite to the above, the shaft member 634 rotates in the direction opposite to the above. As a result, the moving piece 635 moves in the −Y direction, and the first moving member 53 moves in the −Y direction with respect to the second moving member 54.

[Structure of 4th drive device]
As described above, the fourth drive device 64 is a drive device that is fixed to the support member 55 and moves the second moving member 54 supported by the support member 55 along the + X direction. As shown in FIGS. 19 and 20, the fourth drive device 64 includes a motor 641 as a power generator, a worm 642, a worm wheel 643, and a shaft, which form a transmission device, respectively, as in the third drive device 63. It has a member 644 and a moving piece 645, and a first holding member 646 and a second holding member 647. Of these, the first holding member 646 that holds the motor 641 is fixed to the second holding member 647, and the second holding member 647 that rotatably supports the worm wheel 643 and the shaft member 644 is in the support member 55. It is fixed to the end face 55B on the -Z direction side.

In such a fourth drive device 64, when the motor 641 is driven, the rotational force of the spindle 6411 (spindle 6411 of the motor 641) along the + Z direction is transferred to the shaft along the + X direction via the worm 642 and the worm wheel 643. It is transmitted to the member 644. When the shaft member 644 rotates, as shown in FIG. 17, the moving piece 645 inserted into the opening 542 through the through hole 554 moves in the + X direction, whereby the second moving member 54 is supported. It moves in the + X direction with respect to the member 55.
On the other hand, when the motor 641 is driven and the spindle 6411 rotates in the direction opposite to the above, the shaft member 644 rotates in the direction opposite to the above. As a result, the moving piece 645 moves in the −X direction, and the second moving member 54 moves in the −X direction with respect to the support member 55.

[Set position of each rotation axis of the first rotation member and the second rotation member]
Here, the setting positions of the rotation shafts RX and RY of the first rotation member 51 and the second rotation member 52 will be described.
As shown in FIGS. 3 to 5, the rotation axis RX of the first rotation member 51 is along the + X direction along which the rotation axis RX is along and along the central axis CX when viewed from the + Z direction side (light emission side). It is set within the effective diameter of the projection optical device 46 in the + Y direction orthogonal to the + Z direction.
According to this, when the first rotating member 51 is rotated around the rotating shaft RX along the + X direction, the first rotating shaft RX is set outside the above range. The amount of movement of the rotating member 51 in the + Z direction can be reduced. Therefore, even when the first rotating member 51 is rotated around the rotating shaft RX, the liquid crystal panel 453 as the optical modulation device can be positioned within the allowable range of the back focus position of the projection optical device 46. can.

In this embodiment, the rotation axis RX is set so as to be orthogonal to the central axis CX of the projection optical device 46 within the above range when viewed from the + Z direction side (light emission side). Therefore, the amount of movement of each end of the projection optical device 46 on the ± Y direction side can be reduced. In the present embodiment, the modulated light incident on the projection optical device 46 passes through a region on the −Y direction side from the central axis CX of the projection optical device 46, and is fanned by the projection optical device 46 on the + Y direction side. Be projected. From this, it is important that the amount of movement of the end portion on the −Y direction side is small in order to position the liquid crystal panel 453 as the optical modulation device within the allowable range of the back focus position of the projection optical device 46. .. Then, as described above, even when the first rotating member 51 is rotated and the projection optical device 46 is tilted with respect to the XY plane due to the rotation axis RX orthogonal to the central axis CX, the projection optics The amount of movement of the device 46 (particularly the end portion on the ± Y direction side) toward the ± Z direction can be reduced. Therefore, the liquid crystal panel 453 can be reliably positioned within the allowable range of the back focus position of the projection optical device 46.

Similarly, as shown in FIGS. 3 and 4, the rotation axis RY of the second rotation member 52 also has the + Y direction and the central axis along which the rotation axis RY is aligned when viewed from the + Z direction side (light emission side). It is set within the effective diameter of the projection optical device 46 in the + X direction orthogonal to the + Z direction along which the CX is. In the present embodiment, the rotation axis RY is set so as to be orthogonal to the central axis CX of the projection optical device 46 within the range when viewed from the + Z direction side (light emission side).
As a result, similarly to the above, even when the second rotating member 52 is rotated around the rotation axis RY and tilted with respect to the XY plane, it is within the allowable range of the back focus position of the projection optical device 46. The liquid crystal panel 453 can be positioned.
From the above viewpoint, the rotation axes RX and RY may be set so as to pass through the passage region of the modulated light in the projection optical device 46.

[Effect of embodiment]
The rotation axis RY (first rotation axis) of the second rotation member 52 (first rotation member of the present invention) is along the + Y direction (second direction), and the first rotation of the adjusting device 6 is performed. It is orthogonal to the central axis CX of the projection optical device 46 supported by the member 51. According to this, even when the second rotating member 52 is rotated to rotate the projection optical device 46, the movement of the end portion of the projection optical device 46 on the light incident side can be reduced. Therefore, it is possible to prevent the back focus position of the projection optical device 46 from being displaced, and it is possible to easily position the liquid crystal panel 453 within the allowable range of the back focus position of the projection optical device 46. Therefore, when the projection optical device 46 is tilted with respect to the central axis (illumination optical axis Ax) of the modulated light incident on the projection optical device 46 by the second rotating member 52, or by the first moving member 53. Even when the projection optical device 46 is moved along the −Y direction, it is possible to appropriately project the modulated light (image) by the projection optical device 46 after the position adjustment.

Of the second rotating member 52 and the first moving member 53, the first moving member 53 supports the second rotating member 52. According to this, these members 52 and 53 can be integrated. Therefore, for example, as compared with the case where the second rotating member 52 is rotatably provided on one surface of one support member and the first moving member 53 is movably provided on the other surface, the adjusting device 5 The configuration can be simplified and miniaturized.

Here, when the rotating member rotating around the rotating shaft RX supports the moving member moving along the + Y direction, when the rotating member is rotated, the adjusting device 5 is viewed from the + Z direction side. The amount of movement of the moving member when viewed is different depending on the amount of rotation (rotation angle) of the rotating member. Therefore, the calculation of the adjustment amount when adjusting the position of the projection optical device 46 by moving the moving member becomes complicated. This is also the case when the rotating member rotating around the rotating shaft RY supports the moving member moving along the + X direction.

Further, the rotating member that rotates around the rotating shaft RX supports the moving member that moves along the + Y direction, and the moving member or the configuration provided in the moving member is the projection optical device 46. When supporting, when the moving member is moved to the end side of the rotating member that protrudes to the light emitting side when the rotating member is rotated, the movement is moved along the inclined rotating member. The member is further displaced to the light emitting side. On the contrary, if the moving member is moved to the end side of the rotating member that protrudes to the light incident side when the rotating member is rotated, the moving member is further displaced to the light incident side. In these cases, the projection optical device is also moved along the first direction as the moving member moves. Along with this, the back focus position of the projection optical device also shifts along the first direction, so that the liquid crystal panel 453 as the optical modulation device may not be arranged within the allowable range of the back focus position.

On the other hand, the first moving member 53 movably supported by the second moving member 54 rotatably supports the second rotating member 52 that rotatably supports the first rotating member 51. Therefore, even if the first moving member 53 is moved while the second rotating member 52 is rotated, the first moving member 53 can be moved by the amount of movement when viewed along the + Z direction. It is moved in that direction of movement. According to this, even when the first moving member 53 and the second moving member 54 move, the moving amount of each moving member 53, 54 and the rotating amount of each rotating member 51, 52 can be controlled independently. .. Therefore, the position of the projection optical device 46 can be easily adjusted to an appropriate position.
Further, the first moving member 53 and the second moving member 54 are located on the light incident side (-Z direction side) with respect to the first rotating member 51 and the second rotating member 52, and the second rotation is performed. Since the first rotating member 51 supported by the member 52 supports the projection optical device 46, even when the moving members 53 and 54 are moved and the rotating members 51 and 52 are further rotated, projection is performed. It is possible to prevent the back focus position of the optical device 46 from shifting to the light emitting side (+ Z direction side). Therefore, the projection of the modulated light by the projection optical device 46 after the position adjustment can be appropriately performed.

In addition to the second rotating member 52 and the first moving member 53, the adjusting device 5 is centered on a rotating shaft RX (second rotating shaft) orthogonal to the central axis CX along the + X direction (third direction). The projection optical device 46 is moved along the + X direction with the first rotating member 51 (second rotating member of the present invention) configured to rotate the projection optical device 46. A second moving member 54 configured to be movable is provided. According to this, the adjustment axis of the projection optical device 46 can be increased. Therefore, the projection optical device 46 can be arranged at a more appropriate position.

As described above, when the first rotating member 51 and the second rotating member 52 are located on the light incident side with respect to the first moving member 53 and the second moving member 54, the back of the projection optical device 46 The focus position may shift to the light emitting side.
On the other hand, in the adjusting device 5, the second moving member 54, the first moving member 53, and the second rotating member are in order from the incident side of the modulated light incident on the projection optical device 46 and passing through the projection optical device 46. 52, the first rotating member 51 is arranged. As a result, it is possible to prevent the back focus position from shifting to the light emitting side. Therefore, the projection optical device 46 after the position adjustment can appropriately project the modulated light (image).

Here, since the projection optical device 46 projects an image on the projected surface, the lens on the light emitting side in the projection optical device 46 is generally exposed to the outside of the outer housing 2. Is. On the other hand, on the light incident side with respect to the projection optical device 46, optical components such as a light modulation device that forms an image are generally densely arranged. Therefore, when replacing the projection optical device 46, it is conceivable to pull the projection optical device 46 out of the exterior housing 2 toward the light emitting side. However, when the locking member for locking the projection optical device 46 is provided on the member located on the light incident side, the extraction of the projection optical device 46 to the light emitting side tends to be complicated, and eventually the projection optics. The replacement work of the device 46 tends to be complicated.
On the other hand, among the members 51 to 55 constituting the adjusting device 5, the first rotating member 51 located on the light emitting side most in the traveling direction of the modulated light locks the projection optical device 46. It has a member 513. According to this, the projection optical device 46 can be easily pulled out from the adjusting device 5 to the light emitting side, and by extension, the projection optical device 46 can be easily pulled out from the outer housing 2. Therefore, the replacement work of the projection optical device 46 can be simplified.

Each of the drive devices 61 to 64 is arranged according to the edges different from each other among the four edges of the adjusting device 5 configured in a substantially rectangular shape (substantially rectangular shape) when viewed from the + Z direction side. According to this, it is possible to prevent the parts that rotate or move the rotating members 51, 52 and the moving members 53, 54 from interfering with each other in the drive devices 61 to 64. Therefore, the rotation of the rotating members 51 and 52 and the movement of the moving members 53 and 54 can be reliably performed, and the position adjustment of the projection optical device 46 can be appropriately and reliably performed.
In addition, since the drive devices 61 to 64 can be arranged in a well-balanced manner in the adjustment device 5, the adjustment device 5 having two rotating members 51 and 52 and two moving members 53 and 54 can be miniaturized.

[Modification of Embodiment]
The present invention is not limited to the above embodiment, and modifications, improvements, and the like to the extent that the object of the present invention can be achieved are included in the present invention.
In the above embodiment, the adjusting device 5 includes a first rotating member 51 that can rotate about the rotation axis RX along the + X direction while supporting the projection optical device 46, and the first rotating member 51. A second rotating member 52 that can rotate around the rotation axis RY along the + Y direction while being supported, and a first that can move linearly along the + Y direction while the second rotating member 52 is supported. The structure includes a moving member 53, a second moving member 54 capable of linearly moving along the + X direction while supporting the first moving member 53, and a support member 55. However, not limited to this, the adjusting device 5 may not have one of the first rotating member 51 and the second rotating member 52, and one of the first moving member 53 and the second moving member 54 may be present. It does not have to be. For example, when the first rotating member 51 is not provided, the second rotating member 52 may be configured to support the lens barrel 461 of the projection optical device 46.
Further, the first moving member 53 that supports the second rotating member 52 is not limited to being configured to be movable along the + Y direction, and may be configured to be movable along the + X direction.

In the above embodiment, the first moving member 53 supports the second rotating member 52. However, the present invention is not limited to this, and the second rotating member 52 may support the first moving member 53, and the first moving member 53 may support the projection optical device 46 (lens barrel 461). Further, the arrangement of the rotating members 51 and 52 and the moving members 53 and 54 can be changed as appropriate. A moving member that moves linearly in the direction orthogonal to the + Z direction supports a rotating member centered on a rotating shaft along the direction orthogonal to the + Z direction, and the moving member is on the light incident side with respect to the rotating member. When it is located at, the deviation of the back focus position of the projection optical device can be suppressed as described above.

In the above embodiment, it is assumed that the first rotating member 51 located on the light emitting side has a locking member 513 that locks the lens barrel 461 of the projection optical device 46. However, the present invention is not limited to this, and other members, for example, the support member 55 and the second rotating member 52 may have the locking member 513. On the other hand, in the configuration of the adjusting device 5, the opening 511 of the first rotating member 51 located on the light emitting side can be adjusted to the outer diameter dimension of the lens barrel 461, so that the lens barrel by the locking member 513 can be adjusted. Locking of 461 can be easily and surely carried out without rattling.

In the above embodiment, the drive devices 61 to 64 are provided so as to be arranged according to different edges among the four edges of the substantially rectangular adjusting device 5 when viewed from the + Z direction side. .. However, the present invention is not limited to this, and the drive devices 61 to 64 may be arranged on one side (for example, the + X direction side) of the adjusting device 5. That is, the arrangement of the drive devices 61 to 64 is not limited to the above, and can be appropriately changed.

In the above embodiment, the rotation axis RX of the first rotation member 51 and the rotation axis RY of the second rotation member 52 are assumed to intersect (orthogonally) the central axis CX of the projection optical device 46, respectively. However, not limited to this, if the rotation axis RX is along the + X direction and the rotation axis RY is along the + Y direction, the rotation axes RX and RY do not necessarily have to be orthogonal to the central axis CX. It suffices if it is set within the range of the effective diameter of the projection optical device 46. Further, at least one of the rotation shafts RX and RY may be set outside the range of the effective diameter.

In the above embodiment, the first drive device 61 includes an accommodating body 611, a motor 612, a worm 613, a worm wheel 614, a shaft member 615, a ball bearing 616, 618, an urging member 617, a locking member 619, and a plurality of screws SC1. The configuration is provided with ~ SC3. However, the configuration of the first drive device 61 is not limited to this, and other configurations may be used. For example, a double nut or a pressurized ball screw may be used instead of the urging member 617 as a configuration for suppressing rattling between the stepped hole 5183 of the protrusion 518 and the spiral groove 6151 of the shaft member 615. The same applies to the other drive devices 62 to 64.

In the above embodiment, the projector 1 is provided with three liquid crystal panels 453 (453B, 453G, 453R) as optical modulation devices. However, the present invention is not limited to this, and the present invention can be applied to a projector using two or less or four or more liquid crystal panels.
In the above embodiment, the image forming apparatus 4 is configured in a substantially L-shape shown in FIG. However, the present invention is not limited to this, and the image forming apparatus 4 may be configured in another shape such as a substantially U-shape in a plan view.

In the above embodiment, as the optical modulation device, a transmissive liquid crystal panel 453 whose light incident surface and light emitting surface are different from each other is used. However, the present invention is not limited to this, and a reflective liquid crystal panel in which the light incident surface and the light emitting surface are the same may be used as the light modulation device. Further, if it is an optical modulation device capable of forming an image according to image information by modulating an incident light beam, a device using a micromirror, for example, a device using a DMD (Digital Micromirror Device) or the like, other than a liquid crystal. An optical modulator may be used.
In the above embodiment, the light source device 41 has a light emitting tube 411 and a main reflector 412. However, the present invention is not limited to this, and a configuration having a solid-state light source such as an LED (Light Emitting Diode) or an LD (Laser Diode) may be used. Further, the number of light source devices may be two or more.

1 ... Projector, 41 ... Light source device, 453 (453B, 453G, 453R) ... Liquid crystal panel (light modulation device), 46 ... Projection optical device, 5 ... Adjustment device, 51 ... First rotating member (second rotating member) ), 513 ... Locking member, 52 ... Second rotating member (first rotating member), 53 ... First moving member, 54 ... Second moving member, 61 ... First driving device (second driving device), 62 ... 2nd drive device (1st drive device), 63 ... 3rd drive device, 64 ... 4th drive device, CX ... central axis, RX ... rotation axis (second rotation axis), RY ... rotation axis (1st rotation axis).

Claims (10)

Light source device and
An optical modulation device that modulates the light emitted from the light source device,
A projection optical device in which modulated light modulated by the optical modulator is incident and projects the incident modulated light.
It is provided with an adjusting device that supports the projection optical device and adjusts the position of the projection optical device.
The adjusting device is
When the direction along the central axis of the projection optical device is the first direction, and the two directions orthogonal to the first direction and orthogonal to each other are the second direction and the third direction, the direction is along the second direction. In addition, the projection optical device is rotated about the first rotation axis orthogonal to the central axis, and the projection optical device is rotated about the first rotation axis with respect to a plane orthogonal to the first direction. The first rotating member to be tilted and
A projector characterized by comprising a first moving member that moves along one of the second direction and the third direction to move the projection optical device in the one direction . In the projector according to claim 1,
A projector characterized in that one of the first rotating member and the first moving member supports the other member. In the projector according to claim 2,
The first moving member supports the first rotating member, and the first moving member supports the first rotating member.
The projector is characterized in that the first moving member is located on the incident side of the modulated light incident on the projection optical device with respect to the first rotating member. In the projector according to any one of claims 1 to 3.
A second rotating member configured to rotate the projection optical device along the third direction and around a second rotating axis orthogonal to the central axis.
A projector characterized by comprising a second moving member configured to move the projection optical device along the other direction of the second direction and the third direction so as to be movable. In the projector according to claim 4,
The second moving member, the first moving member, the first rotating member, and the second rotating member are, in order from the incident side of the modulated light that is incident on the projection optical device and passes through the projection optical device. A projector characterized by being placed. In the projector according to claim 4 or 5.
Among the first rotating member, the second rotating member, the first moving member, and the second moving member, in the traveling direction of the modulated light that is incident on the projection optical device and passes through the projection optical device. The projector located on the most emitting side has a locking member for locking the projection optical device. In the projector according to any one of claims 4 to 6.
The first drive device that rotates the first rotating member, and
A second drive device that rotates the second rotating member, and
A third drive device for moving the first moving member, and
A fourth drive device for moving the second moving member is provided.
The adjusting device is formed in a substantially quadrangular shape having four edges when viewed along the first direction.
The projector is characterized in that the first drive device, the second drive device, the third drive device, and the fourth drive device are arranged according to different edges of the four edges. .. In the projector according to any one of claims 1 to 6.
A drive device for operating the adjustment device is provided.
The drive device is
A motor having a spindle arranged along the first rotation axis and generating power for rotating the first rotation member, and a motor.
It has a transmission device that engages with the first rotating member and rotates the first rotating member by the power generated by the motor.
The transmission device is
The worm connected to the spindle and
A worm wheel that meshes with the worm,
A shaft member having a spiral groove on the outer periphery, provided coaxially with the worm wheel, and rotating together with the worm wheel.
It has an accommodating body that rotatably accommodates the shaft member, and has.
The containment body has an opening that exposes the spiral groove of the contained shaft member.
The first rotating member is a projector characterized by having a meshing portion that meshes with the spiral groove through the opening. In the projector according to claim 1,
A drive device for operating the adjustment device is provided.
The first rotating member includes a protrusion having a through hole in a direction orthogonal to each of the first rotating shaft and the first direction.
The drive device is
A motor having a spindle arranged along the first rotation axis and generating power for rotating the first rotation member, and a motor.
It has a transmission device that engages with the first rotating member and rotates the first rotating member by the power generated by the motor.
The transmission device is
The worm connected to the spindle and
A worm wheel that meshes with the worm,
A projector characterized by having a shaft member inserted into the through hole of the protrusion, having a spiral groove on the outer periphery thereof, provided coaxially with the worm wheel, and rotating with the worm wheel. In the projector according to claim 9,
The protrusion meshes with the spiral groove and
The projector is characterized in that the transmission device includes a urging member that urges the protruding portion along the shaft member to maintain a meshed state between the protruding portion and the spiral groove.

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