JP2018185419A - projector - Google Patents

Abstract

A projector that can be miniaturized is provided. The projector includes a projection optical device that projects an image, and a moving device that moves the projection optical device in a direction intersecting the central axis CX of the projection optical device, and the moving device includes the projection optical device. The projection optical device includes a holding member 51 to hold, a support member 53 that supports the holding member so as to be movable in the intersecting direction, and a driving device 54 that moves the holding member in the intersecting direction. The lens barrel main body 482 to be held, the held portion provided on the lens barrel main body and held by the holding member, the holding surface of the held portion by the holding member, and the sliding surface of the holding member with respect to the support member Is spaced apart in the direction along the central axis, and the held portion is located inside the outer shape of the lens barrel body as seen along the central axis, and has a fixed portion fixed to the holding member. [Selection] Figure 3

Description

  The present invention relates to a projector.

  2. Description of the Related Art Conventionally, a projector including a light source device, a light modulation device that modulates light emitted from the light source device, and a projection optical device that projects the modulated light is known. As such a projector, a projector capable of adjusting the projection position of an image by a projection optical device is known (see, for example, Patent Document 1).

The projector described in Patent Document 1 includes a moving device (projection position adjusting device) that holds the projection optical device and moves the projection optical device in a direction orthogonal to the central axis of the projection optical device. The moving device includes a first moving member, a second moving member, a support member, a driving device, a transmission device, and a connecting member. Among these, the support member is a support body to which the first moving member is connected by the connecting member in a state where the second moving member is sandwiched between the support member and the support member. In addition, the driving device is configured to move the first driving member through the first transmission unit of the transmission device and the second movement through the second transmission unit of the transmission device by a user's rotation operation. A second driving unit that moves the member. Among these, the first driving member is moved in the first direction among the orthogonal directions by the first driving unit in a state where the projection optical device is fixed. Further, the second driving unit moves the second moving member in a second direction orthogonal to the first direction among the orthogonal directions while being engaged with the first moving member.
Thereby, the position of the projection optical device can be moved in the first direction and the second direction, and the projection position of the image by the projection optical device can be adjusted.

JP2015-184352A

  In recent years, there is an increasing demand for miniaturization of projectors. On the other hand, there is a demand for a configuration of a moving device that can move the projection optical device, and that can realize downsizing of the projection optical device and thus a projector.

  SUMMARY An advantage of some aspects of the invention is to provide a projector that can be downsized.

  A projector according to an aspect of the present invention includes: a projection optical device that projects an image; and a moving device that moves the projection optical device in a direction intersecting with a central axis of the projection optical device, and the moving device includes: A holding member that holds the projection optical device; a support member that supports the holding member so as to be movable in the intersecting direction; and a drive device that moves the holding member in the intersecting direction. A lens barrel main body that holds the lens, and a held portion that is provided on the lens barrel main body and is held by the holding member, and a holding surface of the held portion by the holding member, and the holding member And the sliding surface with respect to the support member is spaced apart in the direction along the central axis, and the held portion is located inside the outer shape of the barrel body as viewed along the central axis, and the holding member In Characterized in that it has a fixed portion to be fixed.

According to such a configuration, the fixed portion of the held portion fixed to the holding member is located inside the outer shape of the barrel main body as viewed along the central axis of the barrel main body. According to this, for example, when a fixing member such as a screw is inserted into the fixed portion along the central axis and the held portion is fixed to the holding member, the fixing member does not hit the barrel main body. In addition, there is no need to expand the held portion outward from the lens barrel body. Therefore, the projection optical device and the moving device that holds the projection optical device can be reduced in size, and thus the projector can be reduced in size.
And the holding surface of the to-be-held part by a holding member and the sliding surface of the holding member with respect to a supporting member are spaced apart in the direction along the said central axis. According to this, the sliding surface can be positioned substantially at the center of the projection optical device in a state where the holding surface is aligned with the position of the held portion in the projection optical device. For this reason, when the holding member and the projection optical device are moved by the driving device, the projection optical device can be prevented from being inclined. In addition, since the holding surface can be positioned at the end of the projection optical apparatus, it is possible to easily fix the held portion and the holding member.

In the above aspect, the outer shape of the lens barrel body increases toward one of the incident side and the emission side of the image, and the held portion is located on the opposite side to the one in the lens barrel body. It is preferable.
According to such a structure, the to-be-held part in which a to-be-fixed part is located inside the external shape of a lens-barrel main body can be reduced more. Therefore, the projector can be further downsized. Moreover, when fixing a to-be-held part and a holding member using the said fixing member, these to-be-held parts and a holding member can be fixed reliably by inserting the said fixing member from the opposite side to said one side.

In the one aspect, it is preferable that the driving device is positioned on a first direction orthogonal to the central axis with respect to the projection optical device, and moves the holding member along the first direction.
Here, when the driving device for moving the holding member along the first direction is located on the second direction side intersecting with each of the first direction and the central axis with respect to the projection optical device, It is necessary to change the moving direction of the holding member using the transmission device. In this case, providing the transmission device increases the size of the moving device.
In addition, when the driving device is shifted in the first direction and the second direction with respect to the projection optical device, if the holding member is moved in the first direction, the holding member may Since the moving force is applied to the end portion on the direction side, the movement of the holding member is difficult to stabilize.
On the other hand, since the drive device is arranged as described above, it is not necessary to use the transmission device, so that the moving device, and thus the projector, can be reduced in size, and the holding member is moved along the first direction. And can be moved stably.

In the above aspect, the moving device includes a moving member that engages with the holding member, and the driving device is rotated around a rotation axis along the first direction and has a spiral groove on an outer periphery. It has a screw gear, and it is preferable that the moving member meshes with the screw gear and is moved along the first direction as the screw gear rotates.
According to such a structure, a holding member can be reliably moved with rotation of a screw gear. Therefore, the holding member and the projection optical device can be moved with a simple configuration.

In the above aspect, it is preferable that the moving member has an insertion portion that is inserted into the holding member, and the insertion portion has a deformable characteristic.
In addition, such an insertion part can be formed with a deformable material (for example, resin).
According to such a configuration, the insertion portion is deformed (collapsed) when inserted into the holding member, thereby suppressing a gap (play) between the insertion portion and the holding member in the first direction. it can. Accordingly, the holding member and the projection optical apparatus can be moved smoothly, and the occurrence of positional deviation of the projection optical apparatus due to the rattling can be suppressed.

1 is a perspective view showing a projector according to an embodiment of the invention. The schematic diagram which shows the image projection apparatus in the said embodiment. The perspective view which shows the projection optical unit in the said embodiment. The perspective view which shows the projection optical unit in the said embodiment. The disassembled perspective view which shows the projection optical unit in the said embodiment. The perspective view which shows the projection optical apparatus in the said embodiment. The figure which looked at the projection optical apparatus in the said embodiment from the light-incidence side. The disassembled perspective view which looked at the moving apparatus in the said embodiment from the light-projection side. The disassembled perspective view which looked at the moving apparatus in the said embodiment from the light-incidence side. The perspective view which shows the holding member and moving member in the said embodiment. The disassembled perspective view which shows the drive device in the said embodiment. The disassembled perspective view which shows the drive device in the said embodiment. Sectional drawing which shows the moving apparatus in the said embodiment. Sectional drawing which shows the projection optical unit in the said embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[External configuration of projector]
FIG. 1 is a perspective view showing a projector 1 according to this embodiment.
The projector 1 according to the present embodiment modulates light emitted from a light source device 41 provided therein to form an image according to image information, and enlarges and projects the image on a projection surface such as a screen. An image display device. As shown in FIG. 1, the projector 1 includes an exterior housing 2 that constitutes an exterior.
Although the projector 1 will be described in detail later, the configuration of the moving device 5 (see FIG. 3) that can move the projection optical device 48 that projects an image and adjust the projection position of the image by the projection optical device 48. Has one of the characteristics.
Hereinafter, each configuration of the projector 1 will be described.

[Configuration of exterior casing]
The exterior housing 2 is formed in a substantially rectangular parallelepiped shape as a whole. The exterior housing 2 includes 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.
Among these, the front part 23 has the opening part 231 which exposes the edge part by the side of the light emission in the projection optical apparatus 48 mentioned later. The opening 231 is opened and closed by a shutter SH provided inside the front portion 23.

The top surface portion 21 includes a recess 211, openings 212 and 213, and an operation unit 214.
The concave portion 211 is positioned on the front surface portion 23 side in the top surface portion 21, and is formed in a substantially rectangular shape. An opening 212 is formed at the bottom of the recess 211. Through the opening 212, operation levers LV1 and LV2 for performing focus adjustment and zoom adjustment of an image projected by the projection optical device 48 are exposed. Further, a part of a dial 543 constituting the moving device 5 described later is exposed on the inner surface of the concave portion 211 on the back surface portion 24 side.
The opening 213 is located closer to the front part 23 than the recessed part 211, and the long diameter is formed in a long hole shape along the front part 23. Inside the opening 213, the operation part SH1 of the shutter SH is disposed, and the shutter SH opens and closes the opening 231 by sliding the operation part SH1 along the opening 213.
The operation unit 214 has a plurality of buttons (not shown), and outputs an operation signal corresponding to the button input by the user to a control device described later.

[Device configuration]
FIG. 2 is a schematic diagram showing the image projection device 4.
The apparatus main body 3 corresponds to the internal structure of the projector 1 and is disposed in the exterior casing 2. As shown in FIG. 2, the apparatus main body 3 includes an image projection apparatus 4, and although not illustrated, a control apparatus that controls the operation of the projector 1, a power supply apparatus that supplies power to electronic components, and cooling A cooling device for cooling the object is provided.

[Configuration of image projection apparatus]
The image projection device 4 forms and projects an image according to the image information under the control of the control device. The image projection device 4 includes a light source device 41, a uniformizing device 42, a color separation device 43, a relay device 44, an image forming device 45, which are arranged at predetermined positions on the illumination optical axis Ax, which is a designed optical axis. An optical component casing 46 and a projection optical unit 47 are provided.
Among these, the optical component casing 46 is a box-shaped casing that supports the devices 42 to 44 and the field lens 451 and the incident-side polarizing plate 452 of the image forming apparatus 45. Although not shown, the optical component casing 46 has a fixing portion to which the moving device 5 (see FIGS. 3 and 4) of the projection optical unit 47 is fixed.

  The light source device 41 emits a light beam to the homogenizing device 42. The light source device 41 includes a light source lamp 411, a reflector 412 and a collimating lens 413, and a housing 414 for housing them. However, the light source device 41 includes a solid light source such as an LED (Light Emitting Diode) or an LD (Laser Diode), and a wavelength conversion element that converts at least a part of the wavelength of light emitted from the solid light source. It is good. Furthermore, the number of light source devices may be two or more.

The homogenizer 42 uniformizes the illuminance in a plane perpendicular to the central axis of the light beam incident from the light source device 41. The homogenizer 42 includes a first lens array 421, a dimmer 422, a second lens array 423, a polarization conversion element 424, and a superimposing lens 425 in the order of incidence of light beams from the light source device 41. Note that the light control device 422 may be omitted.
The color separation device 43 separates the light beam incident from the uniformizing device 42 into three color lights of red (R), green (G), and blue (B). The color separation device 43 includes dichroic mirrors 431 and 432 and a reflection mirror 433.
The relay device 44 is provided on an optical path of red light having a longer optical path than that of green light and blue light among the separated three color lights. The relay device 44 includes an incident side lens 441, a relay lens 443, and reflection mirrors 442 and 444.

The image forming apparatus 45 modulates the separated color lights according to the image information, and then combines the color lights to form image light. The image forming apparatus 45 includes a field lens 451 provided for each color light, an incident-side polarizing plate 452, a light modulation device 453 (light modulation devices for red, green, and blue are referred to as 453R, 453G, and 453B, respectively) and The output side polarizing plate 454 and one color composition device 455 are provided.
Among these, the light modulation device 453 is a transmissive liquid crystal panel in which, in the present embodiment, the incident surface on which the corresponding color light is incident and the emission surface on which the modulated light is emitted are opposite to each other. Have
In this embodiment, the color synthesizing device 455 is configured by a substantially quadrangular prism-shaped cross dichroic prism, but may be configured by a plurality of dichroic mirrors.

  Although not shown, the light modulation device 453 and the emission-side polarizing plate 454 corresponding to each color light are attached to a holding member fixed to the incident surface of each color light in the color composition device 455. That is, the light modulation device 453, the emission side polarizing plate 454, and the color composition device 455 are integrated as an image forming unit.

[Configuration of projection optical unit]
3 and 4 are perspective views of the projection optical unit 47 as viewed from the light emitting side and the light incident side, respectively. FIG. 5 is an exploded perspective view showing the projection optical unit 47.
As shown in FIGS. 3 to 5, the projection optical unit 47 enlarges and projects the image light formed by the image forming device 45 onto the projection surface, and the image light to the projection surface. And a moving device 5 as a projection position adjusting device capable of adjusting the projection position.

In the following description, among the directions along the central axis CX of the projection optical device 48, the emission direction of the image by the projection optical device 48 is the + Z direction. Of the + X direction and the + Y direction that intersect the + Z direction (the central axis CX) and intersect each other, the + Y direction is a direction from the bottom surface portion 22 toward the top surface portion 21. Further, the + X direction (crossing direction) is a direction from the left side surface portion 25 toward the right side surface portion 26 (in other words, a direction from left to right when viewed from the + Z direction side so that the + Y direction is on the upper side). Further, a direction opposite to the + Z direction is defined as a −Z direction. The same applies to the −X direction and the −Y direction. In the present embodiment, the + X direction, the + Y direction, and the + Z direction are defined as directions orthogonal to each other.
Further, the incident side of the image light with respect to the projection optical device 48 may be referred to as a light incident side (−Z direction side), and the emission side of the image light may be referred to as a light emission side (+ Z direction side).

[Configuration of Projection Optical Device]
FIG. 6 is a perspective view of the projection optical device 48 as viewed from the light incident side.
As shown in FIGS. 5 and 6, the projection optical device 48 includes a plurality of lenses LE, a lens barrel 481 that accommodates the plurality of lenses LE, and two mounting members 484.
The plurality of lenses LE are omitted in addition to the incident side lens LE1 (FIG. 6) to which the image light is incident from the image forming apparatus 45 and the emission side lens LE2 (FIG. 5) from which the image light is emitted. However, a zoom lens and a focus lens are included.

[Configuration of mounting member]
Here, the mounting member 484 (484A, 484B) will be described first with reference to FIGS.
The two mounting members 484 are configured as separate members from the lens barrel 481 and are each attached to a held portion 483 of the lens barrel 481 described later. These mounting members 484 are members used when the projection optical device 48 (lens barrel 481) and a holding member 51 described later of the moving device 5 are combined.
Of the two mounting members 484, the mounting member 484 attached to the end portion on the −X direction side of the held portion 483 includes a flat plate portion 4841, an arc-shaped portion 4842, as shown in FIGS. Two attachment portions 4843 and two screw holes 4844 are provided.

The flat plate portion 4841 faces the surface on the + Z direction side of the held portion 483.
The arc-shaped portion 4842 is formed in an arc shape along the outer shape of a lens barrel body 482 described later.
The two attachment portions 4843 are portions for attaching the attachment member 484 to the held portion 483. These attachment portions 4843 are formed in a hook shape protruding in the −Z direction at the + Y direction end and the −Y direction end in the flat plate portion 4841.
The two screw holes 4844 are formed in the vicinity of the + Y direction side and −Y direction side end portions of the flat plate portion 4841. Screws S1 that are inserted through holes 5142 (see FIG. 10) of the holding member 51 to be described later and through holes 4832 (see FIG. 6) of the held portion 483 to be described later are fixed to the screw holes 4844.

  Note that the mounting member 484A attached to the + X direction side end of the held portion 483 is formed symmetrically with the mounting member 484B about the axis along the + Y direction. That is, the mounting member 484A also has a flat plate portion 4841, an arc-shaped portion 4842, an attachment portion 4843, and a screw hole 4844, like the mounting member 484B.

[Configuration of lens barrel]
FIG. 7 is a diagram of the projection optical device 48 viewed from the light incident side.
As shown in FIGS. 5 to 7, the lens barrel 481 includes a lens barrel body 482 and a held portion 483.
As shown in FIGS. 5 and 6, the lens barrel body 482 is formed in a cylindrical shape whose outer diameter increases stepwise from the −Z direction side toward the + Z direction side. Among these, lenses other than the incident side lens LE1 are held. The part of the barrel main body 482 where the zoom lens and the focus lens are arranged is rotated according to the operation on the operation levers LV1 and LV2 (see FIG. 1). Thereby, the zoom lens and the focus lens are moved along the + Z direction, and the zoom state and the focus state of the projection image are adjusted.

As shown in FIGS. 5 to 7, the held portion 483 is a rectangular plate-like portion that forms a flange portion that extends radially outward in the lens barrel 481, and is on the −Z direction side (light It is arranged at the end of the incident side.
As shown in FIGS. 6 and 7, the held portion 483 includes a protruding portion 4831 and a plurality of through holes 4832.
The protruding portion 4831 protrudes in a cylindrical shape from the surface on the −Z direction side to the −Z direction side. The protruding portion 4831 functions as a gripping portion that grips the incident side lens LE1.

The plurality of through holes 4832 are located at the four corners when the held portion 483 is viewed from the −Z direction side. The screws S1 are inserted through the through holes 4832. That is, each through hole 4832 constitutes a fixed portion that is fixed to the holding member 51 by the screw S1.
Here, as shown in FIG. 7, the through hole 4832 is located inside the outer shape of the barrel main body 482 when viewed from the −Z direction side. Further, each screw hole 4844 of the mounting member 484 coincides with each through hole 4832 when viewed from the −Z direction side, and is similarly located on the inner side of the outer shape of the barrel main body 482. For this reason, the shaft portion of the screw S1 is inserted into each through hole 4832 along the + Z direction from the −Z direction side with respect to the held portion 483, and is fixed to each screw hole 4844 of the mounting member 484. .

[Configuration of mobile device]
8 and 9 are exploded perspective views of the moving device 5 as viewed from the light emitting side and the light incident side, respectively.
As described above, the moving device 5 holds the projection optical device 48, moves the projection optical device 48 along the + Y direction, and adjusts the projection position of the image by the projection optical device 48 in the + Y direction. . As shown in FIGS. 8 and 9, the moving device 5 includes a holding member 51, a moving member 52, a support member 53, and a driving device 54.

[Configuration of holding member]
FIG. 10 is a perspective view of the holding member 51 as viewed from the + Y direction side on the −Z direction side. In FIG. 10, a moving member 52 that is partially inserted into the holding member 51 is also illustrated.
The holding member 51 is supported by the support member 53 so as to be movable in the + Y direction by the moving member 52 and the driving device 54, and is combined by the lens barrel 481 and the screw S1. As shown in FIGS. 8 to 10, the holding member 51 includes a top surface portion 511, a bottom surface portion 512, a front surface portion 513, a back surface portion 514, a left side surface portion 515, and a right side surface portion 516, and these are formed in a box shape. ing.
The top surface portion 511 and the bottom surface portion 512 are portions that intersect the + Y direction, the top surface portion 511 is positioned on the + Y direction side, and the bottom surface portion 512 is positioned on the −Y direction side. The front part 513 and the back part 514 are portions that intersect in the + Z direction, the front part 513 is located on the + Z direction side, and the back part 514 is located on the −Z direction side. The left side surface portion 515 and the right side surface portion 516 are portions that intersect in the + X direction, the right side surface portion 516 is positioned on the + X direction side, and the left side surface portion 515 is positioned on the −X direction side.

Among these, the back surface portion 514 is a portion (a portion that holds the lens barrel 481) that is combined with the held portion 483 of the lens barrel 481. As shown in FIGS. 9 and 10, the back surface portion 514 is formed in a substantially rectangular shape when viewed from the −Z direction side. The back surface portion 514 includes a circular opening 5141 positioned substantially at the center and four holes 5142 positioned at four corners.
The opening 5141 is an opening through which image light incident on the projection optical device 48 passes.
The four holes 5142 are holes through which the shaft portion of the screw S1 is inserted. As described above, the shaft portion of the screw S1 inserted into these holes 5142 is inserted into the through hole 4832 of the held portion 483 and screwed into the screw hole 4844 of the mounting member 484. Thereby, the projection optical device 48 is fixed to the holding member 51. That is, in the holding member 51, the surface on the + Z direction side of the back surface portion 514 becomes a holding surface that holds the projection optical device 48.

As shown in FIGS. 8 to 10, the front portion 513 is formed in a rectangular shape having a long side in the + Y direction when viewed from the + Z direction side, and the end portion on the + Y direction side is in the + Y direction from the top surface portion 511. The end portion on the −Y direction side is located on the −Y direction side from the bottom surface portion 512. Such a front portion 513 includes an opening 5131, four sliding surfaces 5132, four insertion holes 5133, two guide holes 5134, and an inserted portion 5135.
As shown in FIG. 8, the opening 5131 is located at the center in the + Y direction of the front part 513, and the edge of the opening 5131 is connected to the inner surfaces of the surface parts 511, 512, 515, 516. ing. An end portion on the −Z direction side that is fixed to the back surface portion 514 in the lens barrel 481 is inserted into the opening portion 5131.

  As shown in FIGS. 9 and 10, the four sliding surfaces 5132 are located at the four corners of the rectangular front portion 513 and on the surface on the −Z direction side. That is, the sliding surfaces 5132 are located at the four corners of the surface on the −Z direction side facing the support member 53 in the front portion 513. These sliding surfaces 5132 are flat surfaces along the XY plane, and come into contact with a supporting surface 5332 (see FIG. 8) described later in the supporting member 53 when the holding member 51 and the supporting member 53 are combined. That is, each sliding surface 5132 forms a moving surface with respect to the support member 53 in the holding member 51.

As shown in FIGS. 8 to 10, the four insertion holes 5133 are positioned at the four corners of the rectangular front portion 513, that is, at the site where the sliding surface 5132 is formed. The bosses 5333 of the support member 53 are inserted into the insertion holes 5133, respectively.
The two guide holes 5134 are portions where the guide protrusions 5334 of the support member 53 are inserted and guide the movement of the holding member 51 along the + Y direction. These guide holes 5134 are formed in a long hole shape having a long diameter in the + Y direction. Of the guide holes 5134, one guide hole 5134 is located between two insertion holes 5133 located on the + Y direction side with respect to the opening 5131, and the other guide hole 5134 is formed in the opening 5131. On the other hand, it is located between the two insertion holes 5133 located on the −Y direction side.

  As illustrated in FIG. 10, the inserted portion 5135 is located on the surface on the −Z direction side in the front portion 513. The inserted portion 5135 is a hole portion into which the insertion portion 521 of the moving member 52 is inserted, and is an engaging portion that engages with the moving member 52 in the holding member 51. A protruding portion 5136 that reduces the inner diameter of the inserted portion 5135 protrudes inside the inserted portion 5135.

[Configuration of moving member]
The moving member 52 is a member that moves along the + Y direction by a driving device 54 described later and moves the holding member 51 along the + Y direction. As shown in FIGS. 8 to 10, the moving member 52 includes an insertion portion 521, a meshing portion 522, and two contact portions 523, and is formed in a substantially Y shape when viewed from the + Y direction side.
The insertion portion 521 is a protruding portion that protrudes toward the + Z direction, and is inserted into the inserted portion 5135 of the holding member 51. The insertion portion 521 is formed in a substantially U shape whose cross section along the XY plane opens to the −Y direction side. Inside the insertion portion 521, as shown in FIGS. 8 and 9, two convex portions 5211 projecting toward the −Y direction are formed.
When the insertion portion 521 is inserted into the inserted portion 5135, these convex portions 5211 abut against the protruding portion 5136 and are deformed by the protruding portion 5136. By deforming (crushing) these convex portions 5211, a gap (gap in the + Y direction) is prevented from being generated between the inner end surface of the inserted portion 5135 and the insertion portion 521, and the inner end surface and the insertion portion 521 are suppressed. It is suppressed that rattling occurs between the two.
With such a configuration, the moving member 52 (at least the convex portion 5211) is formed of a material (for example, resin) that can be deformed by a predetermined pressing force.

As shown in FIGS. 8 to 10, the meshing portion 522 is formed in an arc shape that is recessed in the + Z direction. As shown in FIGS. 9 and 10, the meshing portion 522 has a plurality of teeth 5221 that mesh with a screw gear 541 of the driving device 54 described later on the surface on the −Z direction side.
The two contact portions 523 extend from both ends of the meshing portion 522 in the + X direction in a direction away from each other. That is, the two contact portions 523 are provided at positions that sandwich the meshing portion 522 in the + X direction. These abutting portions 523 abut on the surface on the −Z direction side of a regulating portion 5316 (see FIG. 11) described later. Accordingly, the moving member 52 is prevented from falling off from the support member 53 in the + Z direction side, and the rotation of the screw gear 541 around the axis along the + Y direction is suppressed. The rotation of 541 is converted into the movement of the moving member 52 along the + Y direction.

[Configuration of support member]
As shown in FIGS. 3 to 5, the support member 53 is a housing that supports the holding member 51, the moving member 52, and the driving device 54 and mainly configures the appearance of the moving device 5. It is fixed to the body 46. As shown in FIGS. 8 and 9, the support member 53 has a top surface portion 531, a bottom surface portion 532, a front surface portion 533, a back surface portion 534, a left side surface portion 535, and a right side surface portion 536, thereby forming a rectangular cylindrical shape. Is formed. Further, inside the support member 53, the accommodation space SP <b> 1 that communicates with the + Z direction side with respect to the front surface portion 533 and the −Z direction side with respect to the back surface portion 534 and is surrounded by the surface portions 531, 532, 535, and 536. Is formed, and the holding member 51 holding the projection optical device 48 is disposed in the accommodation space SP1.
Similar to the holding member 51, the top surface portion 531 and the bottom surface portion 532 intersect with the + Y direction, the top surface portion 531 is positioned on the + Y direction side, and the bottom surface portion 532 is positioned on the −Y direction side. The front part 533 and the back part 534 are portions that intersect in the + Z direction, the front part 533 is located on the + Z direction side, and the back part 534 is located on the −Z direction side. The left side surface portion 535 and the right side surface portion 536 are portions that intersect in the + X direction, the right side surface portion 536 is positioned on the + X direction side, and the left side surface portion 535 is positioned on the −X direction side.

  Among these, the left side surface portion 535 and the right side surface portion 536 have arm portions 5351 and 5361 that are fixed to the optical component casing 46. These arm portions 5351 and 5361 are projected from the side surface portions 535 and 536, and holes through which screws (not shown) fixed to the optical component casing 46 are inserted at positions near both ends in the + Y direction. Parts 5352 and 5362. Further, the arm portion 5351 has a positioning projection 5353 inserted into the optical component housing 46, and although not shown, the arm portion 5361 also has the same positioning projection.

As shown in FIG. 8, the front portion 533 has an opening 5331 into which the holding member 51 is inserted at the center. In addition, the front portion 533 includes four support surfaces 5332, four bosses 5333 and two guide protrusions 5334 that protrude in the + Z direction, respectively.
The four support surfaces 5332 are respectively positioned at the four corners of the rectangular front portion 533 when viewed from the + Z direction side, and are flat surfaces along the XY plane, and support the holding member 51. The supporting surfaces 5332 are in contact with the corresponding sliding surfaces 5132 (see FIG. 9) of the holding member 51. That is, the holding member 51 moves in the + Y direction or the −Y direction along each support surface 5332.

The four bosses 5333 protrude from each support surface 5332 in the + Z direction in the shape of a long cylinder. These bosses 5333 are inserted through the insertion holes 5133 when combined with the holding member 51. In this state, a bottomed cylindrical pressing member PM in which an urging member BM that is a compression coil spring is disposed is attached to each boss 5333, and formed at the front end in the protruding direction of each boss 5333. The screw S2 to which the washer W is attached is fixed to the screw hole. Thereby, the urging force of the urging member BM whose one end is in contact with the washer W acts on the holding member 51 via the pressing member PM in which the other end of the urging member BM is in contact with the bottom, and the holding member 51 Is attached to the support member 53 while being biased toward the support member 53 side. That is, the holding member 51 is pressed against the support member 53 by the pressing member PM to which the biasing force of the biasing member BM is applied.
The two guide protrusions 5334 are provided so as to protrude substantially at the center in the + X direction on the + Y direction side and the −Y direction side with respect to the opening 5331. These guide protrusions 5334 are inserted into the guide holes 5134 to guide the movement of the holding member 51 along the + Y direction and define the movement range of the holding member 51.

As shown in FIG. 9, the back surface portion 534 includes a circular opening 5341 and four holes 5342.
The opening 5341 is an opening through which image light incident on the projection optical device 48 passes.
The four hole portions 5342 are located in the vicinity of the four corners of the back surface portion 534. The screws S1 are inserted through the holes 5342. By forming the hole 5342 in the back surface 534, the projection optical device 48 can be attached to the holding member 51 in a state where the holding member 51 is provided in the accommodation space SP1.

FIG. 11 is a perspective view showing the configuration of the top surface portion 531 of the support member 53. In other words, FIG. 11 is an exploded perspective view of the drive device 54 attached to the support member 53 as viewed from the light emission side (+ Z direction side and + Y direction side).
As shown in FIGS. 8 and 11, the top surface portion 531 has an arrangement portion 5311 in which the driving device 54 is arranged in the vicinity of the end portion on the + Z direction side. As shown in FIG. 11, the arrangement portion 5311 includes a concave portion 5312, two positioning protrusions 5313, three bosses 5314, three wall portions 5315, and two restricting portions 5316.

The recess 5312 is formed in a circular shape. An end portion on the −Y direction side of the screw gear 541 constituting the driving device 54 is inserted into the concave portion 5312.
The two positioning protrusions 5313 are provided so as to protrude from the + X direction so as to sandwich the recess 5312 therebetween. These positioning projections 5313 are inserted through the pressing member 542 constituting the driving device 54 to position the pressing member 542.
The three bosses 5314 protrude from the top surface portion 531 to the + Y direction side, and are parts to which the pressing member 542 is attached by fixing the screw S3 to the tip. Of these bosses 5314, two bosses 5314 located on the + Z direction side sandwich the recess 5312 in the + X direction and are located between the two positioning projections 5313. The remaining one boss 5314 located on the −Z direction side is located on the −Z direction side with respect to the recess 5312.

  The three wall portions 5315 stand up to the + Y direction side from the top surface portion 531 and connect the plurality of bosses 5314 in the same manner as the plurality of bosses 5314. Specifically, of the three wall portions 5315, the two wall portions 5315 are -Z direction from two bosses 5314 located on the + X direction side and the -X direction side with respect to the concave portion 5312 when viewed from the + Y direction side. To extend. The remaining one wall portion 5315 extends from the boss 5314 located on the −Z direction side with respect to the concave portion 5312 to the + X direction side and the −X direction side, and is connected to the two wall portions 5315. . By these wall portions 5315, the recess 5312 is surrounded on three sides (the + X direction side, the −X direction side, and the −Z direction side).

  The two restricting portions 5316 respectively extend in directions close to each other from the two bosses 5314 sandwiching the concave portion 5312 in the + X direction, and abut on the abutting portions 523 of the moving member 52 on the −Z direction side. Specifically, one restricting portion 5316 extends along the −X direction from a boss 5314 positioned on the + X direction side with respect to the recessed portion 5312, and the other restricting portion 5316 is −X with respect to the recessed portion 5312. It extends along the + X direction from a boss 5314 located on the direction side. Along with these restricting portions 5316, the moving member 52 is slid in the + Y direction or the −Y direction as the screw gear 541 rotates.

[Configuration of drive unit]
FIG. 12 is an exploded perspective view of the support member 53 and the driving device 54 as viewed from the light incident side (the −Z direction side and the −Y direction side).
The driving device 54 is connected to the holding member 51 via the moving member 52 and moves (advances / retreats) the holding member 51 along the + Y direction. As shown in FIGS. 3 and 4, the driving device 54 is positioned along the + Y direction and on the direction perpendicular to the central axis CX of the projection optical device 48 (on the first direction). As shown in FIGS. 11 and 12, the driving device 54 includes a screw gear 541, a pressing member 542, a dial 543, a biasing member 544, a washer 545, and screws S3 and S4.

[Configuration of screw gear]
The screw gear 541 is a shaft-like member that is rotatably supported around a rotation axis along the + Y direction by inserting an end portion on the −Y direction side into the concave portion 5312. With this arrangement, the extension line of the central axis of the screw gear 541 is orthogonal to the central axis CX of the projection optical device 48. Such a screw gear 541 has a spiral groove 5411 formed on the circumferential surface from the approximate center in the + Y direction to the end portion on the −Y direction side and meshing with the meshing portion 522 (tooth 5221) of the moving member 52. .
Further, at the + Y direction side portion (the + Y direction side portion with respect to the spiral groove 5411) of the screw gear 541, an enlarged diameter portion 5412 that extends outward from the outer diameter at the formation portion of the spiral groove 5411 is formed.
Further, a fitting portion 5413 formed in an oval shape when viewed from the + Y direction side is formed in a portion on the + Y direction side with respect to the enlarged diameter portion 5412 in the screw gear 541. The fitting portion 5413 is inserted into the dial 543 through the pressing member 542, whereby the screw gear 541 is rotated integrally with the dial 543.

[Configuration of holding member]
The pressing member 542 is a member that is fixed to the top surface portion 531 and is formed by bending a sheet metal in the present embodiment. The pressing member 542 includes a planar covering portion 5421 and leg portions 5425 that extend from the covering portion 5421 and are fixed to the top surface portion 531.
Among these, the covering portion 5421 is fixed to the plurality of bosses 5314 with three screws S3, and covers a portion of the top surface portion 531 surrounded by the plurality of bosses 5314 and the plurality of wall portions 5315. That is, by attaching the pressing member 542 to the top surface portion 531, a space SP2 (FIG. 11) surrounded by the covering portion 5421, the plurality of bosses 5314, and the plurality of wall portions 5315 is formed. In the space SP2, a portion on the −Y direction side including the enlarged diameter portion 5412 in the screw gear 541 and a portion other than the insertion portion 521 in the moving member 52 are disposed.

As shown in FIG. 11, such a covering portion 5421 has two positioning holes 5422, three hole portions 5423, and a hole portion 5424.
The two positioning projections 5313 are inserted into the two positioning holes 5422.
The shafts of the three screws S4 are inserted through the three holes 5423.
The hole 5424 exposes a portion on the + Y direction side from the enlarged diameter portion 5412 of the screw gear 541 in which the end portion on the −Y direction side is inserted into the concave portion 5312, and the enlarged diameter portion 5412 is exposed on the + Y direction side. The screw gear 541 is held without being exposed. The inner diameter of the hole 5424 is larger than the outer diameter of the fitting part 5413 and smaller than the outer diameter of the enlarged diameter part 5412. For this reason, when the pressing member 542 is fixed to the arrangement portion 5311 where the screw gear 541 is arranged, the pressing member 542 suppresses the screw gear 541 from coming off in the + Y direction side.

Dial configuration
The dial 543 is placed on the pressing member 542, and the fitting portion 5413 of the screw gear 541 is inserted to rotate the screw gear 541 in accordance with a rotation operation by the user. As shown in FIGS. 11 and 12, the dial 543 includes an operation portion 5431, a protrusion 5432 (FIG. 12), a hole 5433 (FIG. 12), and a recess 5434 (FIG. 11).

The operation unit 5431 is formed in a cylindrical shape centering on the central axis along the + Y direction of the dial 543. A part of the operation unit 5431 is exposed to the outside of the projector 1 through the concave portion 211 (see FIG. 1) of the exterior housing 2 and is operated by the user. Irregularities are formed on the outer peripheral surface of the operation portion 5431.
As shown in FIG. 12, the protruding portion 5432 is a portion that protrudes in a cylindrical shape toward the −Y direction centering on the central axis inside the operation portion 5431. The protrusion 5432 is formed with a hole 5433 that passes through the dial 543 along the + Y direction.
The hole 5433 is formed in an oval shape corresponding to the fitting portion 5413 of the screw gear 541 when viewed from the −Y direction side. When the fitting portion 5413 is fitted into the hole 5433, the screw gear 541 is rotated with the rotation of the dial 543.

  As shown in FIG. 11, the concave portion 5434 is a portion surrounded by a cylindrical protruding portion 5432 and opens toward the + Y direction. Within the recess 5434, a portion on the + Y direction side from the fitting portion 5413 is located in the screw gear 541 inserted through the hole 5433. In addition to the urging member 544 disposed in the concave portion 5434, a washer 545 fixed to the end portion on the + Y direction side of the screw gear 541 by the screw S4 is disposed.

[Configuration of biasing member and washer]
FIG. 13 is an enlarged view showing a part of a cross section of the moving device 5 along the YZ plane. Specifically, FIG. 13 is an enlarged view of a cross section of the moving device 5 along the YZ plane and including the central axis of the screw gear 541.
The urging member 544 causes the urging force for urging the screw gear 541 to the + Y direction side to act on the washer 545, and causes the urging force to urge the dial 543 to the −Y direction side to act on the dial 543. In the present embodiment, the urging member 544 is configured by a compression coil spring and is disposed around the screw gear 541.
Specifically, as shown in FIG. 13, the urging member 544 is disposed between the bottom 5435 of the recess 5434 and the washer 545 so that the central axis is along the + Y direction. The end portion on the −Y direction side of the biasing member 544 contacts the bottom portion 5435 of the concave portion 5434 of the dial 543, and the end portion on the + Y direction side contacts the washer 545. The biasing member 544 in this state is in a compressed state, that is, a state in which a biasing force can be applied to the + Y direction side and the −Y direction side.

  Therefore, when the washer 545 is used as a reference, the biasing member 544 biases the dial 543 that contacts the surface on the + Y direction side of the pressing member 542 (covering portion 5421) toward the pressing member 542 (−Y direction side). To do. That is, the urging member 544 presses the dial 543 against the pressing member 542. This urging force increases the rotational resistance of the dial 543 (sliding resistance with respect to the pressing member 542 when the dial 543 is rotated). Therefore, depending on the contact area between the dial 543 and the pressing member 542 and the surface roughness, the dial 543 The torque (torque) can be adjusted. Thereby, when a user performs fine projection position adjustment, it can suppress that the dial 543 rotates unintentionally quickly. Therefore, the operation of the dial 543 when performing the projection position adjustment can be easily performed. In the present embodiment, as described above, a part of the dial 543 is exposed outside the exterior housing 2 and is rotated by the user's finger. For this reason, the strength of the dial 543 is set such that the dial 543 can withstand the force of the fingertip, thereby preventing the dial 543 from being damaged without providing a torque limit.

On the other hand, when the bottom portion 5435 is used as a reference, the urging member 544 urges the washer 545 and consequently the screw gear 541 toward the + Y direction. Accordingly, the spiral groove 5411 of the screw gear 541 and the tooth 5221 (the tooth 5221 included in the meshing portion 522 of the moving member 52) that is positioned on the + Y direction side with respect to the spiral groove 5411 and meshes with the spiral groove 5411. Can be brought into contact with each other. In other words, it is possible to suppress a gap (play) between the spiral groove 5411 and the tooth 5221 on the + Y direction side of the spiral groove 5411. Thereby, it is possible to suppress the occurrence of rattling between the screw gear 541 and the moving member 52, and the moving member 52 and the holding member 51 accompanying the rotation of the dial 543 and the screw gear 541, and consequently the projection optical device 48. The movement along the + Y direction can be carried out smoothly.
Although not shown, a gap of a predetermined dimension is provided in the + Y direction between the surface on the + Y direction side of the enlarged diameter portion 5412 of the screw gear 541 and the surface on the −Y direction side of the pressing member 542. Yes. For this reason, when the screw gear 541 is biased in the + Y direction side by a biasing force of a biasing member 544, which will be described later, the clearance between the spiral groove 5411 of the screw gear 541 and the teeth 5221 of the meshing portion 522 of the moving member 52 As a result of the first contact, the expanded diameter portion 5412 and the pressing member 542 are suppressed from contacting each other.

[Deviation between sliding surface and holding surface]
FIG. 14 is a view showing a cross section of the projection optical unit 47 along the YZ plane and including the central axis of the screw gear 541. In FIG. 14, illustration of the internal configuration of the projection optical device 48 is omitted.
Here, as shown in FIG. 14, the sliding surface MS on which the holding member 51 moves relative to the support member 53 is a plane including the sliding surface 5132 of the holding member 51. Further, the holding surface HS on which the holding member 51 holds the projection optical device 48 is a surface on the + Z direction side in the back surface portion 514. The sliding surface MS and the holding surface HS are separated from each other in the + Z direction (the direction along the central axis CX of the projection optical device 48). More specifically, the sliding surface MS is positioned on the + Z direction side with respect to the holding surface HP, and is positioned according to the approximate center of the projection optical device 48 in the + Z direction. Further, the holding surface HP is positioned according to the end of the projection optical device 48 on the −Z direction side.

Therefore, when viewed along the central axis CX, the through-hole 4832 and the screw hole 4844 positioned inside the outer shape of the barrel main body 482 in the held portion 483 and the mounting member 484, and the hole portion 5142 of the holding member 51 On the other hand, these can be fixed by inserting the screw S1 from the −Z direction side. Thereby, it is not necessary to greatly widen the held portion 483 so that the through hole 4832 is positioned outside the outer shape of the barrel main body 482. Therefore, the projection optical device 48 combined with the moving device 5 can be reduced in size.
In addition, since the sliding surface MS is positioned approximately at the center of the projection optical device 48 in the + Z direction, the sliding surface MS is positioned at the same −Z direction side end as the holding surface HS. The stability during movement of the projection optical device 48 along the + Y direction can be improved.
Therefore, the projection optical device 48 can be moved stably, and the projection optical device 48 can be downsized.

[Effect of the embodiment]
The projector 1 according to the present embodiment described above has the following effects.
As shown in FIG. 7, the through-hole 4832 of the held portion 483 held by the holding member 51 in the projection optical device 48 (lens barrel 481) is seen along the central axis CX of the barrel main body 482. Located inside the outer shape. According to this, when the screw S1 is inserted along the central axis CX and the held portion 483, the mounting member 484, and the holding member 51 are fixed, the end portion side (− These can be fixed by inserting the screw S1 from the Z direction side). For this reason, it is not necessary to spread the held portion 483 outward from the lens barrel main body 482 so that the screw S1 does not hit the lens barrel main body 482. Therefore, the projection optical device 48 and the moving device 5 can be reduced in size, and consequently the projector 1 can be reduced in size.
Further, as shown in FIG. 14, the holding surface HS of the projection optical device 48 (held portion 483) by the holding member 51 and the sliding surface MS of the holding member 51 with respect to the support member 53 are the same as those of the projection optical device 48. They are separated in the + Z direction, which is the direction along the central axis CX. According to this, the sliding surface MS can be positioned substantially at the center of the projection optical device 48 in the + Z direction in a state where the holding surface HS is aligned with the position of the held portion 483 in the projection optical device 48. For this reason, when the holding member 51 and the projection optical device 48 are moved by the drive device 54, the projection optical device 48 can be prevented from being inclined. In addition, since the holding surface HS can be positioned at the end of the projection optical device 48, it is possible to easily fix the held portion 483 and the holding member 51. Note that the holding member 51 is held against the support member 53 by being pressed against the support member 53 by the biasing force of the biasing member BM. For this reason, in addition to the fact that the sliding surface MS is positioned substantially at the center of the projection optical device 48 in the + Z direction, the holding member 51 is supported by the support member 53 as well as when the holding member 51 is moved. In this state, it is possible to suppress the tilting moment from acting on the holding member 51 and the projection optical device 48. Therefore, the projection optical device 48 can be maintained in a suitable posture.

  The outer shape of the barrel main body 482 increases from the −Z direction side (the image light incident side from the image forming apparatus 45) toward the + Z direction side (the image light emitting side). The held portion 483 is located on the −Z direction side in the barrel main body 482. According to this, the to-be-held part 483 in which the through-hole 4832 as a to-be-fixed part is located inside the external shape of the lens barrel main body 482 can be further reduced in size. Therefore, the projector 1 can be further downsized. Further, by inserting the screw S1 from the −Z direction side, the held portion 483, the mounting member 484, and the holding member 51 can be reliably fixed.

  The drive device 54 is positioned along the + Y direction and on a direction orthogonal to the central axis CX of the projection optical device 48, and moves the holding member 51 along the direction. According to this, the drive device 54 can move the holding member 51 stably along the + Y direction. In addition, since it is not necessary to use a transmission device that transmits the driving force of the driving device 54, the moving device 5 can be reduced in size, and thus the projector 1 can be reduced in size.

  The drive device 54 has a screw gear 541 that is rotated around a rotation axis along the + Y direction and has a spiral groove 5411 on the outer periphery. By the rotation of the screw gear 541, the moving member 52 that meshes with the screw gear 541 and engages with the holding member 51 is moved along the + Y direction. According to this, the holding member 51 can be moved with the rotation of the screw gear 541. Therefore, the holding member 51 and the projection optical device 48 can be moved along the + Y direction with a simple configuration.

  The moving member 52 has an insertion portion 521 that is inserted into the insertion portion 5135 of the holding member 51. The convex portion 5211 of the insertion portion 521 is deformed (collapsed) by coming into contact with the protruding portion 5136 in the insertion target portion 5135. According to this, it can suppress that a clearance gap (play) arises between the insertion part 521 and the to-be-inserted part 5135 in + Y direction. Accordingly, the holding member 51 and the projection optical device 48 can be moved smoothly, and the displacement of the projection optical device 48 due to the rattling can be suppressed.

[Modification of Embodiment]
The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the above embodiment, the held portion 483 is located at the −Z direction side end of the barrel main body 482, and the barrel main body 482 moves from the −Z direction side to the + Z direction side as the central axis CX. The outer shape is gradually increased as seen along the line. However, the present invention is not limited to this.
For example, the held portion 483 may be provided at a position on the + Z direction side from an end portion on the −Z direction side of the barrel main body 482 or may be provided on an end portion on the + Z direction side. When the held portion is provided at the end on the + Z direction side, the screw S1 may be inserted from the + Z direction side (light emission side).
Further, the outer shape of the barrel main body 482 only needs to be large on the side opposite to the side where the held portion 483 is located, and the barrel main body 482 may have a shape in which the outer shape increases continuously. Furthermore, the barrel main body 482 may have a cylindrical shape with a substantially constant outer shape.
The shape of the held portion 483 is not limited to a rectangle when viewed from the −Z direction side, and may be a circular shape, or may be formed integrally with the lens barrel body 482 as described above.

In the above embodiment, the held portion 483 has the through hole 4832 as the fixed portion, and the mounting member 484 attached to the held portion 483 has the screw S1 shaft portion inserted through the through hole 4832 screwed. The screw holes 4844 are provided. However, the present invention is not limited to this, and the mounting member 484 may be omitted. In this case, the held portion 483 may have a screw hole instead of the through hole 4832. Further, although the through holes 4832 are positioned at the four corners of the rectangular held portion 483, the positions and the number of the through holes 4832 may be changed as appropriate. The position and number of the screw holes 4844 in the case where the mounting member 484 is used are the same.
Further, the held portion 483 is assumed to hold the incident side lens LE1. However, the present invention is not limited to this, and the held portion may not hold the lens.

  In the above embodiment, the driving device 54 is located on the direction perpendicular to the central axis CX of the projection optical device 48 and along the + Y direction. However, the present invention is not limited to this, and the position of the driving device 54 can be changed as appropriate. For example, the driving device 54 may be positioned on a direction orthogonal to the central axis CX and along the + X direction. Moreover, you may employ | adopt the transmission device which can convert rotation of the screw gear 541 into the linear motion along XY plane as needed.

  In the embodiment described above, the moving device 5 has the moving member 52 that meshes with the screw gear 541 of the driving device 54 and moves along the + Y direction as the screw gear 541 rotates. However, the present invention is not limited to this, and the moving member 52 may be integrated with the holding member 51. That is, the holding member 51 may be directly engaged with the driving device 54 and the holding member 51 may be moved by the driving force of the driving device 54. Even when the moving member 52 is used, the insertion portion 521 may not be formed of a deformable material. That is, the insertion portion 521 may not have a deformable characteristic.

  In the above embodiment, the driving device 54 includes the screw gear 541, the pressing member 542, the dial 543, the urging member 544, and the washer 545. However, the present invention is not limited to this, and for example, the urging member 544 may be omitted, and instead of the dial 543, an actuator that rotates the screw gear 541 may be used. Further, an elastic member such as rubber may be employed instead of the urging member constituted by the compression coil spring. That is, the configuration of the driving device 54 that moves the holding member 51 can be changed as appropriate.

In the above embodiment, the projector 1 includes the light modulation devices 453 (453B, 453G, and 453R) each including a liquid crystal panel. However, the present invention is not limited to this, and the present invention can also be applied to a projector including two or less or four or more light modulation devices.
In the above embodiment, the image projection device 4 is configured in a substantially L shape as shown in FIG. However, the present invention is not limited to this, and may have other layouts and configurations such as a substantially U shape.

  In the above embodiment, the light modulation device 453 has a transmissive liquid crystal panel having different light incident surfaces and light emitting surfaces. However, the present invention is not limited to this, and the light modulation device may include a reflective liquid crystal panel having the same light incident surface and light emitting surface. In addition, as long as the light modulation device can modulate an incident light beam and form an image according to image information, a device using a micromirror, for example, a device using a DMD (Digital Micromirror Device) or the like can be used. You may employ | adopt a light modulation apparatus.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 47 ... Projection optical unit, 48 ... Projection optical apparatus, 481 ... Lens barrel, 482 ... Lens barrel main body, 483 ... Holding part, 4832 ... Through-hole (fixed part), 5 ... Moving device, 51 ... Holding member 52 ... Moving member 521 ... Insertion part 53 ... Supporting member 531 ... Top face part 532 ... Bottom face part 533 ... Front face part 534 ... Back face part 535 ... Left side face part 536 ... Right side face part 54 ... Drive device, 541... Screw gear, 542 ... pressing member, 543 ... dial, 545 ... washer, CX ... central axis, HS ... holding surface, LE ... lens, LE2 ... exit side lens, MS ... sliding surface, S2, S3 , S4 ... screw.

Claims (5)

A projection optical device for projecting an image;
A moving device for moving the projection optical device in a direction intersecting the central axis of the projection optical device,
The mobile device is
A holding member for holding the projection optical device;
A support member that supports the holding member so as to be movable in the intersecting direction;
A driving device for moving the holding member in the crossing direction,
The projection optical device includes:
A lens barrel body for holding the lens;
A held portion provided in the barrel main body and held by the holding member;
The holding surface of the held portion by the holding member and the sliding surface with respect to the support member in the holding member are separated in a direction along the central axis,
The projector is characterized in that the held portion is positioned inside the outer shape of the barrel main body as viewed along the central axis, and has a fixed portion fixed to the holding member. The projector according to claim 1.
The outer shape of the barrel main body increases as it goes to one of the incident side and the emission side of the image,
The projector is characterized in that the held portion is located on the opposite side to the one side in the barrel main body. The projector according to claim 1 or 2,
The drive device is located on a first direction orthogonal to the central axis with respect to the projection optical device, and moves the holding member along the first direction. The projector according to claim 3.
The moving device has a moving member that engages with the holding member;
The drive device has a screw gear that is rotated around a rotation axis along the first direction and has a spiral groove on the outer periphery,
The projector is characterized in that the moving member meshes with the screw gear and is moved along the first direction as the screw gear rotates. The projector according to claim 4,
The moving member has an insertion portion that is inserted into the holding member;
The insertion portion has a deformable characteristic.

Images