JP2015169751A - projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projector that enables the stable execution of the movement of a projection optical device.SOLUTION: A projector includes a projection optical device that projects images and a moving device (projection position adjustment device 4) that moves the projection optical device in the orthogonal direction relative to the central axis of the projection optical device. The moving device includes: a moving member (second moving member 7) that holds the projection optical device; a support member (first moving member 6) that movably supports the moving member in the orthogonal direction; a driving device that is provided in one of the support member and moving member to generate a rotating force; a screw gear SG that is provided in one of the members, has a spiral groove formed on the outer periphery, and rotates around the shaft along the orthogonal direction by the rotating force; and an engaging member EM that is provided in the other of the support member and moving member to engage with the spiral groove; and an elastic member ES that is provided between the other member and the engaging member EM.

Description

  The present invention relates to a projector.

  Conventionally, a light source device, a light modulation device that modulates light emitted from the light source device to form an image according to image information, and a projection optical device that projects the image on a projection surface such as a screen A projector equipped is known. As such a projector, there is known a projector capable of adjusting the projection position of an image by moving the projection optical apparatus in a direction orthogonal to the central axis of the projection optical apparatus (see, for example, Patent Document 1).

  The projector described in Patent Document 1 includes a lens barrel moving mechanism that moves a lens barrel that constitutes the projection optical apparatus, and the lens barrel moving mechanism includes a lens holding member that holds the lens barrel, and a fixed lens barrel. A side support member, an intermediate member that relays the lens holding portion and the fixed side support member, and a lens holding member guide mechanism. Among these, the lens holding member guide mechanism includes a first guide mechanism that guides the lens holding member in the vertical direction, a second guide mechanism that guides the lens holding member in the horizontal direction, a first guide mechanism, and a second guide. A driving force applying mechanism that applies a driving force to the mechanism. Among these, the driving force application mechanism includes a motor, a worm connected to the rotation shaft of the motor, a worm wheel meshing with the worm, a screw shaft connected to the worm wheel, a nut screwed to the screw shaft, and the It has a connection member which connects a nut and the inner rail which constitutes the 1st guide mechanism.

  In such a projector, when the motor is driven, the worm wheel and the screw shaft rotate via the worm, the nut moves in the vertical direction, and the inner rail connected to the nut via the connecting member moves up and down. Move in the direction. As a result, the inner rail moves in the vertical direction with respect to the outer rail, and the lens holding member and thus the lens barrel moves in the vertical direction. The movement of the lens holding member in the left-right direction is similarly performed by the second guide mechanism and the driving force applying mechanism that applies a driving force to the second guide mechanism.

JP 2011-123509 A

By the way, as a configuration for converting the rotational motion into the linear motion, as in the driving force applying mechanism, the rotation about the screw shaft is performed in the spiral groove formed on the outer periphery of the screw shaft (screw gear) to be rotated. The structure which meshes | engages the meshing member in which the control was controlled can be considered.
When such a configuration is applied to the movement mechanism of the projection optical apparatus, the screw shaft is rotatably provided on the support member, the engagement member is fixed to the movement member supported by the support member, and the screw shaft is A configuration in which the moving member is linearly moved together with the meshing member by rotating is conceivable. By holding the projection optical device by such a moving member, the projection optical device can be moved in a direction orthogonal to the central axis of the projection optical device.

  However, in such a configuration, when the accumulated tolerance due to manufacturing errors of not only the screw shaft and the meshing member but also each component including the moving member and the support member becomes large, the meshing member meshes with the screw shaft with a constant pressing force. There is a possibility that it will not be broken. Moreover, even if rattling occurs between components, the pressing force changes. In these cases, the load on the screw shaft and the meshing member increases, the rotational force that rotates the screw shaft increases, and the movement of the moving member relative to the support member, that is, the stable movement of the projection optical apparatus may not be performed. is there.

  It is an object of the present invention to provide a projector that can stably carry out the movement of the projection optical apparatus.

  A projector according to a first 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 orthogonal to a central axis of the projection optical device, and the moving device includes: A driving member that holds the projection optical device, a supporting member that supports the moving member so as to be movable in the orthogonal direction, and a drive that generates rotational force provided on one of the supporting member and the moving member. An apparatus, a screw gear provided on the one member, having a spiral groove formed on the outer periphery, and rotating about an axis along the orthogonal direction by the rotational force; and the other member of the support member and the moving member And a meshing member that meshes with the spiral groove, and an elastic member that is disposed between the other member and the meshing member.

  According to the first aspect, the engagement member that meshes with the spiral groove formed on the outer periphery of the screw gear and moves along the axis as the screw gear rotates, and the engagement member provided with the engagement member. An elastic member is provided between the other members. According to this, since the inclination of the meshing member is allowed by the deformation of the elastic member, the pressing force of the meshing member with respect to the screw gear can be kept constant, and the backlash can be absorbed, so the screw gear and the meshing member The load accompanying the meshing can be kept constant. That is, since the meshing member tilts while deforming the elastic member in accordance with a change in load applied to the meshing member, the load can be automatically maintained constant. For this reason, since the meshing state of the rotating screw gear and the meshing member can be stabilized, the relative movement of the other member provided with the meshing member with respect to one member can be stabilized. Accordingly, the projection optical device supported by the moving member can be stably moved.

In the first aspect, it has an attachment member for attaching the engagement member to the other member, the engagement member has a hole portion through which the attachment member is inserted, and the elastic member is at least around the hole portion. Is preferably provided.
In addition, a screw can be illustrated as an attachment member.
According to the first aspect, since the elastic member is provided at least around the hole portion through which the attachment member is inserted, the elastic member can be easily deformed when the load changes. Thus, the engagement member can be easily inclined with respect to the other member to which the engagement member is attached. Accordingly, the meshing state between the meshing member and the screw gear can be reliably stabilized, and as a result, the projection optical device supported by the moving member can be reliably and stably moved.

In the first aspect, it is preferable that the elastic member is set to a size according to an arrangement position of the meshing member with respect to the other member.
According to the first aspect, since the elastic member is set to a size corresponding to the arrangement position of the meshing member, the elastic member is interposed over the entire surface of the meshing member facing the other member. It becomes. According to this, when the said load changes, a meshing member can be made still easier to incline. Therefore, the meshing state between the meshing member and the screw gear can be stabilized more reliably, and as a result, the projection optical device supported by the moving member can be moved more reliably and stably.

  A projector according to a second 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 orthogonal to a central axis of the projection optical device, and the moving device includes: A driving member that holds the projection optical device, a supporting member that supports the moving member so as to be movable in the orthogonal direction, and a drive that generates rotational force provided on one of the supporting member and the moving member. An apparatus, a screw gear provided on the one member, having a spiral groove formed on the outer periphery, and rotating about an axis along the orthogonal direction by the rotational force; and the other member of the support member and the moving member A meshing member that meshes with the spiral groove, wherein the one member includes a bearing into which the screw gear is inserted, a support portion that supports the bearing, And having a an elastic member provided between the receiving and the support portion.

  According to the second aspect, when the load changes, the elastic member provided between the bearing into which the screw gear is inserted and the support portion that supports the bearing are deformed, whereby the screw gear is As in the projector according to the first aspect, the meshing state of the screw gear and the meshing member can be stabilized. Therefore, the relative movement between the other member and the one member can be stabilized, and the projection optical device supported by the moving member can be stably moved.

In the second aspect, the bearings are respectively provided at one end side and the other end side in the direction along the axis of the screw gear, the support portions are provided according to the bearings, and the elastic members are respectively It is preferable to be provided between the support portion and the bearing.
According to the second aspect, bearings are provided on one end side and the other end side in the direction along the axis of the screw gear, and an elastic member is provided between each bearing and the support portion that supports the bearing. It has been. According to this, when the said load changes, it can make it easy to incline a screw gear according to the change of the said load. Therefore, the meshing state of the screw gear and the meshing member can be further stabilized, and as a result, the projection optical device supported by the moving member can be moved more stably.

In the first and second aspects, it is preferable that the one member is the support member, and the other member is the moving member.
According to the said 1st and 2nd aspect, a screw gear is provided in the supporting member which is one member, and a meshing member is provided in the moving member which is the other member. According to this, since the weight of the moving moving member can be reduced, the movement of the moving member can be stabilized. Therefore, the projection optical device supported by the moving member can be moved more stably.

In the first and second aspects, the elastic member is preferably formed of an elastomer.
In the said 1st and 2nd aspect, since the elastic member is formed with the elastomer, the said elastic member can be made easy to deform | transform. In addition, the elastic member can be formed thinner than the case where the elastic member is constituted by a spring member such as a plate spring or a coil spring, and between the engagement member and the other member, and the bearing and the support member. The elastic member can be easily arranged between the two.

1 is a perspective view showing an external appearance of a projector according to a first embodiment of the invention. The figure which shows the structure of the apparatus main body in the said 1st Embodiment. The perspective view which shows the projection position adjustment apparatus in the said 1st Embodiment. The perspective view which shows the projection position adjustment apparatus in the said 1st Embodiment. The perspective view which shows the projection position adjustment apparatus in the said 1st Embodiment. The perspective view which shows the slider in the said 1st Embodiment. The perspective view which shows the supporting member in the said 1st Embodiment. The perspective view which shows the 1st moving member in the said 1st Embodiment. The perspective view which shows the 2nd moving member in the said 1st Embodiment. The perspective view which shows the projection position adjustment apparatus in the said 1st Embodiment. The perspective view which shows the projection position adjustment apparatus in the said 1st Embodiment. The perspective view which shows a part of projection position adjustment apparatus in the said 1st Embodiment. Sectional drawing which shows a part of projection position adjustment apparatus in the said 1st Embodiment. Sectional drawing which shows a part of projection position adjustment apparatus which the projector in 2nd Embodiment of this invention has.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described based on the drawings.
[Schematic configuration of projector]
FIG. 1 is a perspective view showing an external appearance of a projector 1 according to the present embodiment.
The projector 1 according to the present embodiment modulates a light beam emitted from a light source provided therein, forms an image according to image information, and enlarges and projects the image on a projection surface such as a screen. It is. As shown in FIG. 1, the projector 1 includes an exterior housing 2 that constitutes an exterior.

[Configuration of exterior casing]
The exterior housing 2 is a substantially rectangular parallelepiped housing that houses the apparatus main body 10 of the projector 1, and is configured by combining an upper case 21 and a lower case 22. Among these, the upper case 21 constitutes the top surface portion 2A and a part of each of the front surface portion 2C, the back surface portion 2D, and the left and right side surface portions 2E and 2F. In addition, the lower case 22 constitutes a bottom surface portion 2B and a part of each of the front surface portion 2C, the back surface portion 2D, and the side surface portions 2E and 2F.
Among these, a part of the projection optical device 36 is exposed to the front portion 2 </ b> C through the opening 2 </ b> C <b> 1, and the image is projected by the projection optical device 36.

[Internal configuration of projector]
FIG. 2 is a plan view showing the optical unit 3 constituting the apparatus main body 10.
The apparatus main body 10 includes an optical unit 3 and a projection position adjusting device 4 as shown in FIG. In addition, although not shown, the apparatus main body 10 includes a cooling device that cools the components of the projector 1, a power supply device that supplies power to the components of the projector 1, a control device that controls the operation of the projector 1, and the like. Is provided.

[Configuration of optical unit]
The optical unit 3 forms and projects an image according to image information input from the control device. The optical unit 3 includes a light emitting device 31, an illumination optical device 32, a color separation device 33, a relay device 34, an electro-optical device 35, a projection optical device 36, and an optical component casing 37.

  The light emitting device 31 includes a pair of light source devices 311 and 312 arranged to face each other, and a reflection mirror 313 arranged between the pair of light source devices 311 and 312. Among these, the reflection mirror 313 reflects the light incident from the light source device 311 and the light incident from the light source device 312 in the same direction and guides the light to the illumination optical device 32.

The illumination optical device 32 equalizes the illuminance in a plane orthogonal to the central axis of the light beam incident from the light emitting device 31. The illumination optical device 32 includes a light control device 321, a UV filter 322, a first lens array 323, an optical filter 324, a second lens array 325, a polarization conversion element 326, and a superimposing lens 327.
Although not shown in the drawing, the light control device 321 adjusts the amount of light incident on a liquid crystal light valve 353, which will be described later, by shielding a part of the light beam passing therethrough and adjusting the amount of light passing therethrough, and is thus projected. Adjust the brightness of the image.
The UV filter 322 reflects light in the ultraviolet region of the incident light flux. The UV filter 322 is disposed so as to be inclined with respect to the central axis of the incident light beam, and suppresses the reflected ultraviolet light from being incident on the light source devices 311 and 312 via the UV filter 322. Yes.
The optical filter 324 suppresses transmission of light having a predetermined wavelength among incident light beams, and is configured to be inserted into and extracted from the optical path of the light beams.

The first lens array 323 positioned on the light incident side with respect to the optical filter 324 divides the incident light beam into a plurality of partial light beams by a plurality of small lenses.
The second lens array 325 located on the light exit side with respect to the optical filter 324 has a plurality of small lenses corresponding to the plurality of small lenses included in the first lens array 323, and is incident on each small lens. The partial light beam is superimposed on a liquid crystal light valve 353 described later together with the superimposing lens 327.
The polarization conversion element 326 aligns the polarization direction of incident light into one type.

The color separation device 33 includes two dichroic mirrors 331 and 332 and reflection mirrors 333 and 334. By these dichroic mirrors 331 and 332, the light beam incident from the illumination optical device 32 is separated into three color lights of red (R), green (G), and blue (B). The separated green light and blue light are reflected by the reflection mirrors 333 and 334 and are incident on the corresponding field lens 351 for colored light.
The relay device 34 includes an incident side lens 341, a relay lens 343, and reflection mirrors 342 and 344, and guides the red light separated by the color separation device 33 to a field lens 351 for red light.

The electro-optical device 35 modulates each incident color light to form an image corresponding to the image information input from the control device. The electro-optical device 35 includes a field lens 351, an incident-side polarizing plate 352, and a liquid crystal light valve 353 (red, green, and blue liquid crystal light valves that are provided for each color light, respectively, as 353R, 353G, and 353B. ) And one color composition device 354.
Among these, a liquid crystal light valve 353 as a light modulation device is a liquid crystal panel that modulates light incident from the incident-side polarizing plate 352 in accordance with the image information and a certain direction among light beams incident from the liquid crystal panel. And an exit-side polarizing plate that transmits the polarized light.
In this embodiment, the color synthesizing device 354 is a cross dichroic prism having a substantially square shape in plan view in which four right-angle prisms are bonded. The color synthesizer 354 synthesizes each color light (each color light that forms an image) modulated by each liquid crystal light valve 353 by two dielectric multilayer films formed at the interface of each right-angle prism to produce projection optics. The light is emitted to the device 36.

The projection optical device 36 enlarges and projects each color light incident from the color synthesis device 354 on the projection surface, and displays an image formed by the color light. The projection optical device 36 includes a plurality of lenses (not shown) including a focus lens and a zoom lens, a lens barrel 361 that houses the plurality of lenses therein, a zoom adjustment device 362, and a focus adjustment device 363 (FIG. 3 respectively). And FIG. 4).
The zoom adjustment device 362 and the focus adjustment device 363 are respectively provided in the lens barrel 361, and the zoom state of the projection image is obtained by moving the zoom lens and the focus lens back and forth along the central axis (optical axis) of the projection optical device 36, respectively. And adjust the focus state.

The optical component casing 37 is a casing configured by combining a component storage member 371 and a lid-like member (not shown) each formed of synthetic resin or metal.
The component storage member 371 stores therein optical components including the reflection mirror 313 of the light emitting device 31, the devices 32 to 34, and the field lens 351 and the incident-side polarizing plate 352 of the electro-optical device 35. The opening 372 for storing the optical component in the component storage member 371 is closed by a lid-shaped member.

[Configuration of projection position adjusting device]
3 and 4 are perspective views of the projection optical device 36 and the projection position adjusting device 4 as seen from the light incident side and the light emission side, respectively. FIG. 5 is a perspective view of the projection position adjusting device 4 as seen from the light emitting side. In FIG. 5, illustration of the emission side member 72 constituting the second moving member 7 is omitted.
In the following description, the traveling direction of light incident on the projection optical device 36 (the direction along the central axis of the light) is defined as the Z direction, the directions orthogonal to the Z direction and the directions orthogonal to each other are the X direction and The Y direction is assumed. In the following, the Z direction is along the horizontal direction, the Y direction is the direction from bottom to top along the vertical direction, and the X direction is right along the horizontal direction when viewed along the Z direction. From left to right. Furthermore, the Z direction side refers to the downstream side in the Z direction (Z direction tip side), and the opposite side to the Z direction refers to the upstream side in the Z direction (Z direction base end side). The same applies to the other directions.

The projection position adjusting device 4 moves the projection optical device 36 in the X direction and the Y direction orthogonal to the central axis (optical axis) of the projection optical device 36, thereby changing the projection position of the image on the projection surface. The moving device to be adjusted. As shown in FIGS. 3 to 5, the projection position adjusting device 4 includes a support member 5, a first moving member 6, a second moving member 7, a plurality of sliders 8, and a plurality of driving devices 9.
In such a projection position adjusting device 4, after the first moving member 6 is disposed with respect to the support member 5 and the second moving member 7 is disposed with respect to the first moving member 6, each slider 8 and the drive are driven. The apparatus 9 (91, 92) is assembled by being attached.

[Slider configuration]
FIG. 6 is a perspective view showing the slider 8.
Here, the slider 8 will be described first.
As shown in FIG. 6, the slider 8 has a configuration in which rolling elements such as balls are accommodated between an outer rail 81 and an inner rail 82 that are linearly movable relative to each other. The slider 8 is configured such that when one rail of the outer rail 81 and the inner rail 82 slides linearly with respect to the other rail, the rolling element transfers the rolling element rolling surface, so that This is a track member configured to reduce sliding resistance of one rail and to smoothly move the one rail. As shown in FIG. 5, four such sliders 8 are incorporated in the projection position adjusting device 4. Of these, two are provided to straddle the support member 5 and the first moving member 6, and the remaining two are provided to straddle the first moving member 6 and the second moving member 7.

[Configuration of drive unit]
As shown in FIG. 5, the driving device 9 includes a first driving device 91 that moves the first moving member 6 along the Y direction, and a second driving device 92 that moves the second moving member 7 along the X direction. And comprising. Each of these driving devices 91 and 92 includes a motor 9A whose driving is controlled by the control device, a bevel gear 9B provided on the rotating shaft of the motor 9A, and a plate-like mounting member 9C to which the motor 9A is mounted. And comprising. The attachment member 9 </ b> C of the first drive device 91 is attached to the support member 5, and the attachment member 9 </ b> C of the second drive device 92 is attached to the first moving member 6.

[Configuration of support member]
FIG. 7 is a perspective view showing the support member 5.
The support member 5 is fixed to the inner surface of the lower case 22 and supports the first moving member 6 so as to be slidable in the Y direction. As shown in FIG. 7, the support member 5 includes a main body portion 51 and a pair of extending portions 52.
The main body 51 is formed in a rectangular frame shape when viewed along the Z direction. That is, the main body 51 includes side surface portions 511 and 512 along the Y direction, side surface portions 513 and 514 along the X direction, and a substantially rectangular opening 515 in which an edge is formed by the side surface portions 511 to 514. Have. The projection optical device 36 is inserted through the opening 515.

The side surface portion 511 on the X direction side has a mounting portion 5111 that is recessed inward at the approximate center in the Y direction, and the side surface portion 512 opposite to the X direction is recessed inward at a position on the Y direction side. 5121. As shown in FIG. 5, a plate-like body PL that locks the outer rail 81 of the slider 8 disposed between the support member 5 and the first moving member 6 is attached to the attachment portions 5111 and 5121. .
In addition, the first driving device 91 is attached to a position of the side surface portion 512 opposite to the Y direction. Further, in the end surface 51A on the Z direction side of the main body 51, an arrangement portion in which a screw gear SG that engages with the first driving device 91 is disposed at a position opposite to the Y direction, as shown in FIG. 51A1 is provided. The screw gear SG will be described in detail later.
Concave parts 5131 and 5141 that are recessed in the Z direction are formed at substantially the center in the X direction of the side surface parts 513 and 514. These recesses 5131 and 5141 are parts for securing a space when the slider 8 is arranged on the first moving member 6.

The pair of extending portions 52 respectively extend from the side surface portions 511 and 512 in the direction opposite to the Z direction, and then bend in directions close to each other. A support member (not shown) that supports the color synthesizing device 354 is attached to the bent portions of the extending portions 52. At the end of each extending portion 52 opposite to the Y direction, there is a Z direction. A fixing portion 521 that further extends in the opposite direction is provided, and the support member 5 is fixed to the inner surface of the lower case 22 by a screw (not shown) that passes through the fixing portion 521.

[Configuration of First Moving Member]
FIG. 8 is a perspective view showing the first moving member.
The first moving member 6 is located on the Z direction side with respect to the support member 5, and moves in the Y direction and the direction opposite to the Y direction along the end surface 51 </ b> A by the first driving device 91. The moving member 7 is movably supported. In other words, the first moving member 6 is a support member that supports the second moving member 7 so as to be movable in relation to the second moving member 7.
As shown in FIG. 8, the first moving member 6 is formed in a rectangular frame shape when viewed along the Z direction. That is, the first moving member 6 includes side surface portions 61 and 62 along the Y direction, side surface portions 63 and 64 along the X direction, and a substantially rectangular opening in which an edge is formed by the side surface portions 61 to 64. 65. The projection optical device 36 is inserted through the opening 65.

  The side surface portion 61 on the X direction side has a mounting portion 611 that is recessed inward in the approximate center in the Y direction, and the side surface portion 62 on the opposite side to the X direction has a mounting portion 621 at a position on the Y direction side. As shown in FIG. 5, the inner rail 82 of the slider 8 disposed between the support member 5 and the first moving member 6 is attached to the attachment portions 611 and 621. Thereby, the 1st moving member 6 and the supporting member 5 are combined.

  As shown in FIG. 8, the side surface portion 63 on the Y direction side has a mounting portion 631 that is recessed inward at the approximate center in the X direction, and the side surface portion 64 on the opposite side to the Y direction is an approximate center in the X direction. The mounting portion 641 is recessed inside. As shown in FIG. 5, these attachment portions 631, 641 have a plate-like body PL that locks the outer rail 81 of the slider 8 disposed between the first moving member 6 and the second moving member 7. It is attached. In addition, the second driving device 92 is attached to a position of the side surface portion 64 on the X direction side.

Further, as shown in FIG. 8, the end face 6A on the Z direction side of the first moving member 6 is provided in the arrangement portion 51A1 at a position opposite to the X direction and opposite to the Y direction. A mounting portion 6A1 to which a meshing member EM (see FIGS. 10 and 11) that meshes with the screw gear SG is mounted is provided.
In addition, on the end surface 6A, an arrangement portion 6A2 in which the screw gear SG that meshes with the second driving device 92 is arranged at a position on the X direction side and the opposite side to the Y direction. The arrangement portion 6A2 and the screw gear SG will be described in detail later.

[Configuration of Second Moving Member]
The second moving member 7 is positioned on the Z direction side with respect to the first moving member 6, and moves in the X direction and the direction opposite to the X direction along the end surface 6 </ b> A of the first moving member 6. As shown in FIG. 4, the second moving member 7 includes an incident side member 71 facing the end surface 6 </ b> A, and an emission side member 72 positioned on the Z direction side with respect to the incident side member 71.
Among these, the emission side member 72 is a plate-like body formed in a substantially rectangular shape, and is fixed to the incident side member 71 with screws. The emission side member 72 has a substantially circular opening 721 at a substantially center, and the projection optical device 36 is inserted through the opening 721. Then, the output side member 72 and the incident side member 71 are fixed to each other with a screw, so that a flange portion (not shown) protruding in the radial direction from the lens barrel 361 of the projection optical device 36 is sandwiched. The projection optical device 36 is held by the second moving member 7.

FIG. 9 is a perspective view showing the incident side member 71 constituting the second moving member 7.
As shown in FIG. 9, the incident side member 71 is formed in a rectangular frame shape when viewed along the Z direction. That is, the incident side member 71 includes side surface portions 711 and 712 along the Y direction, side surface portions 713 and 714 along the X direction, and a substantially rectangular opening 715 in which an edge is formed by the side surface portions 711 to 714. And having. The projection optical device 36 is inserted through the opening 715.

The side surface portion 713 on the Y direction side has a mounting portion 7131 that is recessed inward in the approximate center in the X direction, and the side surface portion 714 on the side opposite to the Y direction has an mounting portion 7141 in the approximate center in the X direction. As shown in FIG. 5, the inner rails 82 of the slider 8 disposed between the first moving member 6 and the second moving member 7 (incident side member 71) are attached to the attaching portions 7131 and 7141. . Thereby, the 2nd moving member 7 and the 1st moving member 6 are combined.
In addition, on the end surface 71A on the Z direction side of the incident side member 71, two projecting portions 71A1 projecting in the Z direction are provided near the edge of the opening 715. Specifically, each protrusion 71A1 is provided in the vicinity of both ends in the X direction and at a substantially central position in the Y direction. These projecting portions 71A1 are inserted into the flange portion (not shown) of the projection optical device 36, whereby the lens barrel 361 is positioned with respect to the incident side member 71.
Further, a meshing member EM (see FIGS. 10 and 11) that meshes with the screw gear SG provided in the arrangement portion 6A2 is located on the end surface 71A on the X direction side and on the opposite side to the Y direction. An attachment portion 71A2 to be attached is provided.

[Arrangement of drive unit]
FIG. 10 is a perspective view of the projection position adjusting device 4 as viewed from the Z direction side.
As described above, the first driving device 91 is attached to the support member 5, and the second driving device 92 is attached to the first moving member 6. Specifically, as shown in FIG. 10, the first drive device 91 is attached to the support member 5 at a position opposite to the X direction and opposite to the Y direction. Are attached to the first moving member 6 at a position on the X direction side and opposite to the Y direction. That is, in terms of the relationship between the support member 5 and the first moving member 6, the support member 5 corresponds to one member and the supporting member of the present invention, and the first moving member 6 corresponds to the other member and the moving member of the present invention. Equivalent to. In terms of the relationship between the first moving member 6 and the second moving member 7, the first moving member 6 corresponds to one member and a support member of the present invention, and the second moving member 7 is the other member of the present invention. And corresponds to a moving member.

FIG. 11 is a perspective view showing the projection position adjusting device 4 with the drive device 9 removed from the state shown in FIG.
As shown in FIG. 11, an arrangement portion 51 </ b> A <b> 1 where the screw gear SG is arranged is provided at the position of the support member 5 according to the first drive device 91, and the mounting portion 6 </ b> A <b> 1 in the first moving member 6 includes A meshing member EM that meshes with the screw gear SG is attached by a screw via an elastic member ES.
An arrangement portion 6A2 in which the screw gear SG is arranged is provided at the position of the first moving member 6 according to the second driving device 92, and the mounting portion 71A2 in the incident side member 71 of the second moving member 7 is A meshing member EM that meshes with the screw gear SG is attached by a screw via an elastic member ES.

[Configuration of screw gear]
FIG. 12 is a perspective view showing the screw gear SG arranged in the arrangement portion 6A2 and the meshing member EM attached to the attachment portion 71A2. FIG. 13 is a cross-sectional view showing the projection position adjusting device 4, and more specifically, a cross-sectional view along the XZ plane including the central axis of the screw gear SG arranged in the arrangement portion 6A2.
As shown in FIGS. 12 and 13, the screw gear SG is provided on a rotating shaft SG1 having a spiral groove SG11 formed on the outer periphery, and on one end side of the rotating shaft SG1, and is rotated with the rotating shaft SG1. And a gear SG2. Among these, bevel gear SG2 meshes with bevel gear 9B which constitutes the above-mentioned drive device 9, and screw gear SG is rotated with rotation of the bevel gear 9B.
That is, the screw gear SG arranged in the arrangement unit 51A1 rotates with the rotation of the bevel gear 9B of the first drive device 91, and the screw gear SG arranged in the arrangement unit 6A2 is the bulk of the second drive device 92. It rotates along with the rotation of the gear 9B.

[Configuration of placement section]
The arrangement portion 6A2 in which the screw gear SG is arranged is provided according to a portion on one end side and the other end side in the direction along the central axis of the rotation shaft SG1 of the screw gear SG, and rotates via the bearing BR. It has support part 6A3 which supports axis | shaft SG1. These support portions 6A3 are formed in a substantially U shape and sandwich the rotation shaft SG1 in the Y direction. The screw gear SG is rotatably arranged on the arrangement portion 6A2 by the support portion 6A3 and the bearing BR.
The placement portion 51A1 also has the same configuration as the placement portion 6A2, has a support portion 51A2 (see FIG. 11) similar to the support portion 6A3, and the screw gear SG is placed on the support portion via the bearing BR. Is done.

[Configuration of meshing member]
As shown in FIG. 12, the meshing member EM has a substantially T-shape having a fixing part EM1 extending in one direction and an extending part EM2 extending in a direction perpendicular to the one direction from the approximate center of the fixing part EM1. The metal member is formed in a shape, and can be formed of, for example, a zinc alloy.
Among these, the extension part EM2 has a meshing part EM21 that meshes with a spiral groove formed on the rotation shaft SG1, as shown in FIGS.
A holding part EM11 for holding the meshing member EM protrudes from the fixed part EM1. Moreover, the hole part EM12 in which the screw S which attaches the meshing member EM penetrates is formed in the both ends of the said one direction in the fixing | fixed part EM1, respectively.
Such a meshing member EM is attached to the mounting portions 6A1 and 71A2 by two screws S as mounting members that pass through the hole EM12, but between the meshing member EM and the mounting portions 6A1 and 71A2. The elastic member ES is arranged. That is, the meshing member EM is attached to the attachment portions 6A1 and 71A2 by two screws S via the elastic member ES.

[Configuration of elastic member]
The elastic member ES is a member formed of an elastically deformable material, and in the present embodiment, is configured of an elastomer. The elastic member ES is formed in a shape corresponding to the fixing portion EM1 so as to be disposed at least around the hole EM12. In the present embodiment, the elastic member ES is formed slightly larger than the fixed part EM1.
By such an elastic member ES being interposed between the meshing member EM and the attachment portion 6A1, the meshing member EM is centered on an axis along the direction connecting the hole EM12 when viewed from the Z direction side. In addition to being able to tilt in the circumferential direction (circumferential direction centered on the axis along the X direction and the D1 direction shown in FIG. 12), the axis along the extending direction of the extending part EM2 from the fixed part EM1 Can be tilted in the circumferential direction centered on (circumferential direction centered on the axis along the Y direction and in the direction D2 shown in FIG. 13). That is, the meshing member EM is tilted (rotated) around the axis along the X direction and centered around the axis along the Y direction by the elastic member ES in a range where it is attached to the attachment portion 6A1 by the screw S. Can be tilted (rotated).
Similarly, the elastic member ES is interposed between the engagement member EM and the attachment portion 71A2, so that the engagement member EM is attached to the attachment portion 71A2 by the screw S, by the elastic member ES. Tilt (rotation) around the axis along the X direction and tilt (rotation) around the axis along the Y direction are possible.

  Here, when the accumulated tolerance due to manufacturing errors of the first moving member 6 and the second moving member 7 including the screw gear SG and the meshing member EM increases, the meshing member EM meshes with the screw gear SG with a constant pressing force. There is a possibility that it will not be broken. In this case, the screw gear SG is disposed at a position closer to or farther than the design position with respect to the meshing member EM, and the screw gear SG and the meshing member EM are meshed so that the screw gear SG is slightly bent. (Warping) may occur. In such a case, the rotational force for rotating the screw gear SG is not constant, and the load acting on the screw gear SG and the meshing member EM is not stable.

  On the other hand, since the elastic member ES is interposed between the engagement member EM that engages with the screw gear SG and the mounting portions 6A1 and 71A2, the elastic member ES is elastically deformed, so that the engagement member EM The above tilt is possible. For this reason, if it will be in the state where the said load increases, the meshing member EM will incline automatically in the direction which reduces the said load. As a result, the rotational force can be kept constant and the load can be stabilized. Accordingly, the first moving member 6 provided with the engaging member EM is provided for the support member 5 provided with the screw gear SG, and the engaging member EM is provided for the first moving member 6 provided with the screw gear SG. The provided second moving member 7 can be moved stably.

The projector 1 according to the present embodiment described above has the following effects.
A meshing member EM that meshes with the spiral groove SG11 of the screw gear SG and moves along the central axis of the rotation shaft SG1 as the screw gear SG rotates, and mounting portions 6A1, 71A2 provided with the meshing member EM, Between them, an elastic member ES is provided. According to this, since the elastic member ES is elastically deformed, the above-described tilting of the meshing member EM is allowed, so that the load accompanying the meshing of the screw gear SG and the meshing member EM can be maintained constant. That is, since the meshing member EM tilts while deforming the elastic member in accordance with a change in load applied to the meshing member EM, the load can be automatically maintained constant. For this reason, since the meshing state of the rotating screw gear SG and the meshing member EM can be stabilized, the relative movement of the first moving member 6 provided with the meshing member EM with respect to the support member 5, and the meshing member The relative movement of the second moving member 7 provided with the EM with respect to the first moving member 6 can be stabilized. Therefore, the projection optical device 36 supported by the first moving member 6 and the second moving member 7 can be stably moved with respect to the support member 5.

  The elastic member ES is provided around the hole EM12 through which the screw S is inserted. According to this, when the load changes, the elastic member ES can be easily deformed, and as a result, the engagement member EM can be easily inclined with respect to the attachment portions 6A1 and 71A2. Therefore, the meshing state between the meshing member EM and the screw gear SG can be reliably stabilized, and the projection optical device 36 can be moved reliably and stably.

  The elastic member ES is formed in a size corresponding to the arrangement position of the meshing member EM, that is, a size corresponding to the fixing portion EM1, so that the elastic member ES is attached to the mounting portion 6A1 in the fixing portion EM1 of the meshing member EM. , 71A2 is interposed over the entire surface. According to this, when the said load changes, the meshing member EM can be made still easier to incline. Therefore, the meshing state of the meshing member EM and the screw gear SG can be stabilized more reliably, and as a result, the projection optical device 36 can be moved more reliably and stably.

  In the relationship in which the first moving member 6 moves relative to the support member 5, the screw gear SG and the first driving device 91 that rotates the screw gear SG support the first moving member 6 movably. The meshing member EM is provided on the first moving member 6 that is a movement target. Moreover, in the relationship in which the second moving member 7 moves relative to the first moving member 6, the second gear 92 that rotates the screw gear SG and the screw gear SG supports the second moving member 7 so as to be movable. The engaging member EM is provided on the second moving member 7 to be moved. According to this, since the weight of the moving object can be reduced with respect to the member that supports the moving object, the movement of the moving object (the first moving member 6 and the second moving member 7) can be stabilized. Accordingly, the projection optical device 36 can be moved more stably.

  The elastic member ES is formed of an elastomer in this embodiment. According to this, the elastic member ES can be easily deformed. Further, the elastic member ES can be formed thinner than the case where the elastic member ES is configured by a spring member such as a plate spring or a coil spring, and the elastic member ES is elastic between the engagement member EM and the mounting portions 6A1 and 71A2. The member ES can be easily arranged. Therefore, the assembly of the support member 5, the first moving member 6, and the second moving member 7 can be performed relatively easily, and as a result, the assembly of the projection position adjusting device 4 can be simplified.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
The projector according to the present embodiment has the same configuration as the projector 1, but the arrangement position of the elastic member ES is different from the projector 1. In the following description, parts that are the same as or substantially the same as those already described are assigned the same reference numerals and description thereof is omitted.

FIG. 14 is a cross-sectional view of the projection position adjusting device 4A showing the position of the elastic member ES included in the projector 1A according to the present embodiment.
The projector 1A according to the present embodiment has the same configuration and function as the projector 1 except that the projector 1A includes a projection position adjustment device 4A instead of the projection position adjustment device 4. The projection position adjusting device 4A has the same configuration and function as the projection position adjusting device 4 except that the arrangement position of the elastic member ES is different.
In the present embodiment, the elastic member ES is provided between the bearing BR and the support portion that supports the bearing BR in the placement portions 51A1 and 6A2. For example, in the arrangement portion 6A2, the elastic member ES is provided between each bearing BR and a support portion 6A3 that supports the bearing BR, as shown in FIG. These elastic members ES are also formed of an elastomer in this embodiment.
Similar to the projector 1, the elastic member ES may be disposed between the attachment portions 6A1 and 71A2 and the meshing member EM.

The projector 1A according to the present embodiment can achieve the same effects as the projector 1 described above.
That is, when the load changes, the elastic member ES provided between the bearing BR and the support portion (for example, the support portion 6A3) is deformed, whereby the screw gear SG can be tilted. According to this, similarly to the projector 1, the meshing state of the screw gear SG and the meshing member EM can be stabilized, the relative movement of the first moving member 6 with respect to the support member 5, and the first movement. The relative movement of the second moving member 7 with respect to the member 6 can be stabilized. Accordingly, the projection optical device 36 can be moved stably.

  The bearing BR and the support portion (for example, the support portion 6A3) between which the elastic member ES is interposed are provided on one end side and the other end side in the direction along the central axis of the screw gear SG. According to this, when the said load changes, the screw gear SG can be made easy to incline according to the change of the said load. Therefore, the meshing state of the screw gear SG and the meshing member EM can be further stabilized, and as a result, the projection optical device 36 can be moved more stably.

[Modification of Embodiment]
The present invention is not limited to the above-described embodiments, 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 first embodiment, the engagement member EM is attached to the attachment portions 6A1 and 71A2 by the screw S as the attachment member. However, the present invention is not limited to this. For example, the engagement member EM may be attached to the attachment portions 6A1 and 71A2 using an adhesive. In this case, the meshing member EM may be further attached to the elastic member ES attached to the attachment portions 6A1 and 71A2 using an adhesive. That is, the type of attachment member is not limited as long as the engagement member EM can be attached to the attachment portions 6A1 and 71A2 so as to be tiltable by the interposed elastic member ES.

  In the first embodiment, the elastic member ES is formed with a size corresponding to the fixing portion EM1 of the meshing member EM facing the attachment portions 6A1 and 71A2. However, the present invention is not limited to this. For example, the elastic member ES may be arranged only around the hole EM12. That is, the arrangement and dimensions of the elastic member ES are not limited as long as the engagement member EM can be tilted with respect to the attachment portions 6A1 and 71A2.

  In the second embodiment, each of the elastic members ES is between a bearing BR provided on both ends along the central axis of the screw gear SG and a support portion (for example, the support portion 6A3) that supports the bearing BR. It was supposed to be provided. However, the present invention is not limited to this. For example, it is good also as a structure which provides the elastic member ES only between one bearing BR and the support part which supports the said bearing BR. Further, although the support portion has a substantially U shape, the present invention is not limited to this. For example, you may form so that the outer periphery of bearing BR may be covered. Furthermore, the position and number of the bearing BR and the support portion with respect to the screw gear SG can be changed as appropriate.

  In each of the above embodiments, in the relationship between the support member 5 and the first moving member 6, the screw gear SG and the drive device 9 (first drive device 91) are provided on the support member 5 and mesh with the screw gear SG. The meshing member EM was provided on the first moving member 6 that moves relative to the support member 5. Further, in the relationship between the first moving member 6 and the second moving member 7, the screw gear SG and the driving device 9 (second driving device 92) are provided in the first moving member 6 and mesh with the screw gear SG. The meshing member EM is provided on the second moving member 7 that moves relative to the first moving member 6. That is, the meshing member EM is provided on the member to be moved, and the screw gear SG and the driving device 9 are provided on the member that supports the object to be moved. However, the present invention is not limited to this. That is, the screw gear SG and the driving device 9 are provided on the members to be moved (for example, the first moving member 6 and the second moving member 7), and the meshing member EM is a member on the support side (for example, the supporting member 5 and the first moving member). It may be provided on the member 6).

  In each of the above embodiments, the elastic member ES is formed of an elastomer. However, the present invention is not limited to this. For example, an elastic member formed of rubber or a foam material may be used, or a spring member such as a leaf spring and a coil spring may be used as the elastic member ES. That is, the elastic member ES may be made of any material as long as it can be elastically deformed so that the meshing member EM and the screw gear SG can be tilted.

In each of the above embodiments, the projectors 1 and 1A include the three liquid crystal light valves 353R, 353G, and 353B, but the present invention is not limited to this. That is, the present invention can also be applied to a projector using two or less or four or more liquid crystal light valves 353.
In each of the above embodiments, the transmissive liquid crystal light valve 353 having a different light incident surface and light emitting surface is used. However, a reflective liquid crystal light valve having the same light incident surface and light emitting surface is used. Also good. 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. A light modulation device may be used.
In each of the above embodiments, the light emitting device 31 includes the light source devices 311 and 312 and the reflection mirror 313 that reflects the light emitted from the light source devices 311 and 312 toward the illumination optical device 32, respectively. did. However, the present invention is not limited to this. That is, the number of light source devices may be one, or three or more. In addition, when there is one light source device, the reflection mirror can be omitted.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 36 ... Projection optical apparatus, 4 ... Projection position adjustment apparatus (moving apparatus), 5 ... Support member, 6 ... 1st moving member (supporting member and moving member), 7 ... 2nd moving member (moving member) 91 ... 1st drive device (drive device), 92 ... 2nd drive device (drive device), 51A2, 6A3 ... support part, BR ... bearing, EM ... meshing member, EM12 ... hole, ES ... elastic member, S ... screw (attachment member), SG ... screw gear, SG11 ... spiral groove.

Claims (7)

A projection optical device for projecting an image;
A moving device that moves the projection optical device in a direction orthogonal to the central axis of the projection optical device,
The mobile device is
A moving member for holding the projection optical device;
A support member for supporting the moving member so as to be movable in the orthogonal direction;
A driving device which is provided on one of the support member and the moving member and generates a rotational force;
A screw gear provided on the one member, having a spiral groove formed on an outer periphery, and rotating about an axis along the orthogonal direction by the rotational force;
A meshing member provided on the other member of the support member and the moving member and meshing with the spiral groove;
And a resilient member provided between the other member and the meshing member. The projector according to claim 1.
An attachment member for attaching the meshing member to the other member;
The meshing member has a hole through which the mounting member is inserted,
The projector is characterized in that the elastic member is provided at least around the hole. The projector according to claim 1 or 2,
The said elastic member is set to the dimension according to the arrangement position of the said engagement member with respect to said other member, The projector characterized by the above-mentioned. A projection optical device for projecting an image;
A moving device that moves the projection optical device in a direction orthogonal to the central axis of the projection optical device,
The mobile device is
A moving member for holding the projection optical device;
A support member for supporting the moving member so as to be movable in the orthogonal direction;
A driving device which is provided on one of the support member and the moving member and generates a rotational force;
A screw gear provided on the one member, having a spiral groove formed on an outer periphery, and rotating about an axis along the orthogonal direction by the rotational force;
An engagement member provided on the other member of the support member and the moving member, and meshing with the spiral groove;
The one member is
A bearing into which the screw gear is inserted;
A support portion for supporting the bearing;
And a resilient member provided between the bearing and the support. The projector according to claim 4,
The bearings are respectively provided on one end side and the other end side in the direction along the axis of the screw gear.
The support portion is provided according to the bearing,
The projector is characterized in that the elastic member is provided between each of the support portion and the bearing. The projector according to any one of claims 1 to 5,
The one member is the support member,
The other member is the moving member. The projector according to any one of claims 1 to 6,
The projector, wherein the elastic member is made of an elastomer.

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