JP5277645B2 - projector - Google Patents

Description

  The present invention relates to a projector.

2. Description of the Related Art Conventionally, a projector including a projection optical device that magnifies and projects image light and an exterior housing that houses the projection optical device is known.
In such projectors, various techniques have been proposed that allow replacement of the projection optical device (projection lens) (see, for example, Patent Document 1).
In the technique described in Patent Document 1, the projection lens and the device casing (exterior casing) are connected by a bayonet-type connection structure, and the projection lens can be exchanged with respect to the device casing.

JP 2003-195419 A

By the way, as a projector, when the projector is fixed at a low position and projected upward, or when the projector is fixed at a high position and projected downward, further, in addition to these vertical tilt projections, There is a case to project a tilt. In such a case, it is necessary to move the projection lens in a direction orthogonal to the direction in which the light beam is emitted (projection direction) with respect to the optical system such as the light modulation device.
In the technique described in Patent Document 1, since the projection lens is connected to the apparatus housing unit, there is a problem in that the projection position cannot be adjusted by moving the projection lens in a direction orthogonal to the projection direction. is there.

  An object of the present invention is to provide a projector capable of adjusting the projection position and exchanging the projection optical device and improving convenience.

  The projector of the present invention includes a projection optical device that magnifies and projects image light, and a moving member that supports the projection optical device and moves in a plane orthogonal to the projection direction, and adjusts the projection position of the projection optical device. A projector comprising a projection position adjusting device, and the projection optical device and an exterior housing for housing the projection position adjusting device, wherein an outer surface of the projection optical device has an engagement recess recessed toward the inside. An attachment / detachment device is formed and attaches / detaches the projection optical device to / from the moving member, and the attachment / detachment device is supported by the moving member and engages with the engaging recess in a plane orthogonal to the projection direction. An engaging member that moves between a mating position and a non-engaging position that does not engage with the engaging recess, and a biasing member that is supported by the moving member and biases the engaging member toward the engaging position. And the exterior casing An operation member that is exposed and pressed, and an operation transmission member that is supported by the moving member and moves forward and backward along the projection direction. The operation transmission member is operated when the operation member is pressed. The operation member is pressed in a direction opposite to the projection direction, and the pressing force of the operation member is converted into a force in an in-plane direction orthogonal to the projection direction and transmitted to the engagement member, and the urging force The engagement member is moved to the non-engagement position against the biasing force of the member, and the operation member and the operation transmission member extend along a plane orthogonal to the projection direction and abut against each other. Each of the contact surfaces has a length dimension along the moving direction of the moving member set to be greater than or equal to a separation dimension between the moving end positions of the moving member. Features.

In the present invention, the projector includes an engagement device, a biasing member, an operation member, and an operation transmission member, and includes an attachment / detachment device that attaches / detaches the projection optical device to / from the projection position adjustment device. Thereby, as shown below, the projection optical device can be attached to and detached from the projection position adjusting device from the outside of the exterior housing.
First, in a state where the operation member is not pressed by the user (normal state), the engagement member is positioned at the engagement position by the urging force of the urging member. In a state where the projection optical device is installed on the moving member of the projection position adjusting device, the engagement member is engaged with the engagement recess of the projection optical device, so that the projection optical device cannot be removed (attached). State).
On the other hand, when the operation member is pressed by the user, the operation transmission member is pressed in the direction opposite to the projection direction by the operation member, and the pressing force of the operation member is converted into a force in an in-plane direction orthogonal to the projection direction. Then, it is transmitted to the engaging member, and the engaging member is moved to the non-engaging position against the urging force of the urging member. That is, the unlocked state in which the engagement between the engagement recess and the engagement member is released is obtained. For this reason, it becomes possible to remove a projection optical apparatus.
When the projection optical device is attached to the projection position adjusting device, for example, as described above, the operation member is pressed to enter the unlocked state, and the projection optical device is installed on the moving member. Then, by stopping the pressing operation of the operating member, the urging force of the urging member results in the normal state described above, and the engaging member is engaged with the engaging recess and the projection optical device is attached.

The projection optical device is attached to the moving member of the projection position adjusting device. Thus, by moving the moving member, the projection optical device can be moved in a plane orthogonal to the projection direction, that is, the projection position can be adjusted.
At this time, since the operation transmission member is supported by the moving member, the operation transmitting member moves in a plane orthogonal to the projection direction together with the moving member. Moreover, since the operation member is provided in the exterior housing, it does not move in accordance with the movement of the moving member. Here, at least one of the contact surfaces of the operation member and the operation transmission member has a length dimension along the moving direction of the moving member greater than or equal to a separation dimension (movable distance) between the movement end positions of the moving member. Is set. Thereby, even when the moving member is moved, it is possible to realize a configuration in which the operation member and the operation transmission member are always in contact with each other. That is, even if the projection optical device is moved to any position, the projection optical device can be attached to and detached from the projection position adjusting device by pressing the operation member.
Therefore, the projection position can be adjusted, the projection optical device can be replaced, the convenience can be improved, and the object of the present invention can be achieved.

  In the projector according to the aspect of the invention, the operation transmission member may include a rod extending along the projection direction, and the rod may be formed in a crank shape having a bent portion, and the projection may be projected on an outer surface of the bent portion. A pair of pressing surfaces that are inclined with respect to the plane orthogonal to the direction and are opposed to each other are formed, and the engaging member can pass through the projection direction and the rod can be inserted, and a peripheral edge is the pair of pressing surfaces It is preferable that the through-hole which contacts is formed.

In the present invention, since the operation transmitting member is composed of the rod described above, the peripheral edge of the through hole is formed on one pressing surface by moving in the direction opposite to the projection direction in accordance with the pressing operation of the operating member by the user. , And the engagement member can be moved in a plane orthogonal to the projection direction to be positioned at the non-engagement position. Further, for example, if the urging member described above is configured to urge the rod in the projection direction, in the normal state, the urging force of the urging member presses the periphery of the through hole on the other pressing surface, The engagement member can be moved in a plane orthogonal to the projection direction and positioned at the engagement position. That is, in the configuration described above, the biasing member is configured to bias the engagement member to the engagement position via the rod.
Therefore, the structure in which the pressing force of the operation member is converted into a force in the in-plane direction orthogonal to the projection direction and transmitted to the engagement member can be configured with a rod that is a simple configuration. It can be easily moved to the disengaged position.

  In the projector according to the aspect of the invention, the projection optical device includes a cylindrical barrel that houses a plurality of lenses therein, and an attachment projection having the engagement recess at the tip is formed on the outer periphery of the barrel. The moving member is formed with a circular insertion hole through which the lens barrel can be inserted, and an inner periphery of the insertion hole is cut out along the projection direction and the mounting protrusion is inserted. A protrusion insertion portion that can be formed, and a protrusion engagement portion that is connected to the protrusion insertion portion and is notched in a rotation direction about the cylindrical axis of the lens barrel so that the attachment protrusion can be inserted. The moving member has a storage support portion that communicates with the protrusion engaging portion, and stores and supports the engaging member so that a part of the engaging member can protrude and retract in the protrusion engaging portion. The engaging member is inclined so as to gradually approach the protrusion insertion portion along the rotational direction. And, it is preferable that the projection optical device is rotated in contact with the inclined surface on the mounting protrusion in the mounting protrusion is inserted into the protruding engaging portion formed in the direction of rotation.

In the present invention, a mounting projection having an engaging recess at the tip is formed on the outer periphery of the lens barrel constituting the projection optical apparatus. The moving member is formed with an insertion hole having a protrusion insertion portion and a protrusion engagement portion on the inner periphery. That is, the moving member and the projection optical device are connected by a so-called bayonet type connection structure.
Here, the engaging member has a slope and is configured such that a part of the engaging member can project and retract into the protrusion engaging portion while being accommodated and supported by the accommodating support portion of the moving member. Accordingly, in the above-described normal state, the projection projection device is aligned with the projection projection portion, the projection optical device is inserted into the insertion hole, the projection optical device is rotated, and the projection projection portion is inserted into the projection engagement portion. Then, when attaching to the moving member, the inclined surface is pressed by the attaching projection, and the engaging member moves toward the non-engaging position against the urging force of the urging member. Then, when the projection optical device is further rotated so that the engaging recess of the mounting projection is positioned at the tip position of the engaging member, the pressing of the mounting projection is released and the biasing force of the biasing member is engaged. The member moves to the engagement position and engages with the engagement recess. Then, the projection optical device cannot be rotated due to the engagement between the engagement recess and the engagement member, that is, the projection optical device is attached to the moving member.
Therefore, the projection optical device can be attached to the moving member by rotating the projection optical device without pressing the operation member to move the engagement member to the non-engagement position, which improves convenience. It can be further planned.
Further, since the mounting protrusion and the engaging member abut each other in the protrusion engaging portion, the user does not feel a load on the hand when inserting the projection optical device through the insertion hole, and the projection optical device is When the mounting projection is rotated and inserted through the projection engaging portion, a load is felt on the hand due to the contact between the mounting projection and the engaging projection. For this reason, for example, as compared with a configuration in which a load is felt in the hand when the projection optical device is inserted through the insertion hole, the projection optical device can be more reliably used without being left in the wrong mounting state. It can be attached to a moving member.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Appearance structure]
FIG. 1 is a perspective view showing an appearance of a projector 1 according to this embodiment. Specifically, FIG. 1 is a perspective view of a state in which the projector 1 is installed on a desk or the like viewed from the upper front side.
Note that “upper”, “lower”, “left”, and “right” described below correspond to up, down, left, and right in the drawing view of FIG. Further, “front” and “rear” described below correspond to the front and rear as viewed in the drawing in FIG.
The projector 1 modulates a light beam emitted from a light source according to image information to form image light, and enlarges and projects the formed image light on a screen (not shown). As shown in FIG. 1, the projector 1 includes an exterior casing 2 that constitutes an exterior.

The exterior housing 2 accommodates the apparatus main body of the projector 1. As shown in FIG. 1, the exterior casing 2 configures an upper case 21 that configures the top surface, the front surface, the back surface, and the side surface of the projector 1, and the bottom surface, the front surface, the back surface, and the side surface of the projector 1, respectively. And a lower case 22.
In the exterior casing 2, as shown in FIG. 1, a first dial 541 and a second dial 551 constituting a projection position adjusting device 5 described later are exposed on the top surface.
Then, when the dials 541 and 551 are rotated by the user, the projection lens 3 described later moves in the vertical direction and the horizontal direction, and the position (projection position) of the projected image on the screen is adjusted. .
In the exterior housing 2, an opening 2 </ b> A for exposure that exposes the tip of the projection lens 3 is formed at a substantially central portion of the front surface in the left-right direction.
Furthermore, as shown in FIG. 1, an operation button 65 constituting a lens attaching / detaching device 6 described later is exposed in the lower right portion of the exposure opening 2A in the exterior housing 2.
The projection lens 3 can be exchanged when the operation button 65 is pressed by the user.

[Internal configuration]
FIG. 2 is a diagram schematically showing the apparatus main body accommodated in the exterior casing 2.
The main body shown in FIG. 2 is accommodated in the exterior housing 2. The apparatus main body includes a projection lens 3 as a projection optical apparatus, an optical unit 4, a projection position adjusting apparatus 5, a lens attaching / detaching apparatus 6 (see FIG. 3), and the like.
Although not specifically illustrated, in the exterior casing 2, in a space other than the members 3 to 6, a cooling unit including a cooling fan for cooling the inside of the projector 1, and each component of the projector 1 It is assumed that a power supply unit that supplies power to the projector, a control device that controls the operation of each component of the projector 1, and the like are arranged.

[Configuration of projection lens]
The projection lens 3 enlarges and projects the image light formed by the optical unit 4 on the screen.
Although not specifically shown, the projection lens 3 is configured as a combined lens in which a plurality of lenses are housed in a lens barrel 31 (see FIG. 4).
A circular recess 311 (see FIG. 4) is formed on the distal end side of the lens barrel 31 as a mark when the projection lens 3 is replaced.
Further, on the base end side of the lens barrel 31, three mounting projections 312 (see FIG. 4) are formed on the same circumference centered on the lens axis, extending in the rotation direction about the lens axis. Has been. These three mounting projections 312 are formed at rotationally symmetric positions of about 120 ° with the lens axis as the center.
In these three mounting projections 312, one end in the extending direction (terminal end in the clockwise direction when viewed from the front side) is the length dimension of the mounting protruding portion 312 in the extending direction toward the lens axis. The slope 3121 is formed so that becomes gradually larger.
In addition, an engagement recess 3122 for engaging a lock slider 63 (to be described later) constituting the lens attaching / detaching device 6 is formed at the tip of one of the three attachment projections 312A. Has been.

[Configuration of optical unit]
The optical unit 4 optically processes the light beam emitted from the light source to form image light corresponding to the image information under the control of the control device. As shown in FIG. 2, the optical unit 4 includes a light source device 41, an illumination optical device 42, a color separation optical device 43, a relay optical device 44, an optical device 45, and these optical components 41 to 45. And an optical component housing 46 to be housed.

  As shown in FIG. 2, the light source device 41 includes a light source 411, a reflector 412 and the like. Then, the light source device 41 emits the light beam emitted from the light source 411 toward the illumination optical device 42 with the light emission direction aligned by the reflector 412.

  As shown in FIG. 2, the illumination optical device 42 includes a first lens array 421, a second lens array 422, a polarization conversion element 423, and a superimposing lens 424. The light beam emitted from the light source device 41 is divided into a plurality of partial light beams by the first lens array 421 and forms an image in the vicinity of the second lens array 422. Each partial light beam emitted from the second lens array 422 is incident so that its central axis (principal ray) is perpendicular to the incident surface of the polarization conversion element 423, and the polarization conversion element 423 emits approximately one type of linearly polarized light. Injected as light. A plurality of partial light beams emitted from the polarization conversion element 423 as linearly polarized light and passed through the superimposing lens 424 are superimposed on three liquid crystal panels 451 described later of the optical device 45.

As shown in FIG. 2, the color separation optical device 43 includes two dichroic mirrors 431 and 432 and a reflection mirror 433, and the dichroic mirrors 431 and 432 and the reflection mirror 433 emit the light from the illumination optical device 42. It has a function of separating a plurality of partial light beams into three color lights of red, green, and blue.
As shown in FIG. 2, the relay optical device 44 includes an incident side lens 441, a relay lens 443, and reflection mirrors 442 and 444, and the color light separated by the color separation optical device 43, for example, red light, is optical device 45. Of the liquid crystal panel 451R on the red light side, which will be described later.

  The optical device 45 modulates an incident light beam according to image information to form image light. As shown in FIG. 2, this optical device 45 includes three liquid crystal panels 451 (red light side liquid crystal panel 451R, green light side liquid crystal panel 451G, and blue light side liquid crystal panel 451B. ), An incident side polarizing plate 452 disposed on the front side of the optical path of each liquid crystal panel 451, an exit side polarizing plate 453 disposed on the rear side of the optical path of each liquid crystal panel 451, and a cross as a color combining optical device. And a dichroic prism 454.

The three incident-side polarizing plates 452 transmit only polarized light having substantially the same polarization direction as the polarization direction aligned by the polarization conversion element 423 among the light beams separated by the color separation optical device 43, and other light beams. The polarizing film is affixed on the translucent substrate.
The three liquid crystal panels 451 have a configuration in which a liquid crystal as an electro-optical material is hermetically sealed in a pair of transparent glass substrates, and the alignment state of the liquid crystal is controlled according to a drive signal from the control device, The polarization direction of the polarized light emitted from the incident side polarizing plate 452 is modulated.
The three exit-side polarizing plates 453 have substantially the same function as the incident-side polarizing plate 452 and transmit polarized light in a certain direction among the light beams emitted through the liquid crystal panel 451 and absorb other light beams. To do.

  The cross dichroic prism 454 synthesizes each color light modulated for each color light emitted from the emission side polarizing plate 453 to form a color image. The cross dichroic prism 454 has a substantially square shape in plan view in which four right-angle prisms are bonded together, and two dielectric multilayer films are formed on the interface where the right-angle prisms are bonded together. These dielectric multilayer films transmit color light emitted from the liquid crystal panel 451G and transmitted through the emission-side polarizing plate 453, and reflect each color light emitted from the liquid crystal panels 451R and 451B and transmitted through the emission-side polarizing plate 453. In this way, the color lights are combined to form image light. The image light formed by the cross dichroic prism 454 is emitted to the projection lens 3.

[Configuration of projection position adjustment device]
FIG. 3 is a perspective view showing the structure of the projection position adjusting device 5 and the lens attaching / detaching device 6. Specifically, FIG. 3 is a perspective view of the vicinity of the opening 2A for exposure as viewed from the front side with the upper case 21 removed.
The projection position adjusting device 5 supports the projection lens 3 and adjusts the projection position of the projection lens 3 by moving the projection lens 3 in the vertical direction and the horizontal direction. As shown in FIG. 3, the projection position adjusting device 5 includes a fixing member 51 fixed inside the projector 1, a moving member 52 that supports the projection lens 3 and moves in the vertical and horizontal directions, a fixing member 51, and A second moving plate 53 that is interposed between the moving members 52, engages with the moving member 52, moves in the left-right direction together with the moving member 52, and the first dial 541 and moves the moving member 52 in the up-down direction The first adjustment driving unit 54 to be moved, the second adjustment driving unit 55 having the second dial 551 to move the second moving plate 53 in the left-right direction, and the fixing member 51 from the back side to the fixing member 51. A connecting member (not shown) that movably connects the moving member 52 is provided.

When the first dial 541 is rotated by the user, the rotational force of the first dial 541 is converted into a linear moving force by a transmission conversion mechanism such as a worm constituting the first adjustment driving unit 54. Is transmitted to the moving member 52, and the moving member 52 moves up and down with respect to the fixed member 51. As the moving member 52 moves in the vertical direction, the projection position of the projection lens 3 connected to the moving member 52 is changed in the vertical direction.
Further, when the second dial 551 is rotated by the user, the rotational force of the second dial 551 is converted into a linear moving force by a transmission conversion mechanism such as a worm constituting the second adjustment driving unit 55. Is transmitted to the second moving plate 53, and the second moving plate 53 moves in the left-right direction with respect to the fixed member 51. As the second moving plate 53 moves in the left-right direction, the moving member 52 engaged with the second moving plate 53 is interlocked, and the projection position of the projection lens 3 connected to the moving member 52 is changed in the left-right direction. The

In addition, below, the structure of the moving member 52 relevant to the lens attaching / detaching apparatus 6 used as the principal part of this invention is demonstrated, and description is abbreviate | omitted about the detailed structure of other members, such as the members 51 and 53-55.
FIG. 4 is an exploded perspective view of the moving member 52 and a part of the lens attaching / detaching device 6 as viewed from the front side.
As shown in FIG. 3 or FIG. 4, the moving member 52 includes a first moving plate 56 and an attachment member 57.

[Configuration of the first moving plate]
As shown in FIG. 4, the first moving plate 56 is configured by a plate body having a substantially rectangular shape in plan view.
In the first moving plate 56, an opening portion 561 having a size substantially the same as the outer diameter size of the lens barrel 31 and allowing the proximal end portion of the lens barrel 31 to be inserted is formed in a substantially central portion. Yes.

Further, in the first moving plate 56, a first urging member 61, a rod 62, and a lock slider 63, which will be described later, constituting the lens attaching / detaching device 6 are supported on the end surface on the front side on the lower right corner portion. A first support portion 562 is formed.
The first support portion 562 includes an urging member storage portion 563 and a pair of rail portions 564.
The biasing member storage portion 563 has a substantially rectangular frame shape that protrudes from the end surface on the front surface side of the first moving plate 56. The urging member housing portion 563 accommodates the first urging member 61 and allows insertion of one end side of the rod 62.

  The pair of rail portions 564 are formed in a plate shape protruding from the front end face of the first moving plate 56. The pair of rail portions 564 are such that the plate surfaces face each other with the biasing member storage portion 563 interposed therebetween, and the plate surfaces follow the direction from the lower right to the upper left (the moving direction of the lock slider 63). Is formed. The pair of rail portions 564 has the lock slider 63 disposed between them, and guides the movement of the lock slider 63 in a state of being in contact with the lock slider 63.

[Configuration of mounting members]
The attachment member 57 attaches the projection lens 3 to the first moving plate 56. As shown in FIG. 4, the attachment member 57 includes a plate-like portion 57A having a lens insertion hole 571 at a substantially central portion, and a circular frame extending from the peripheral portion of the lens insertion hole 571 to the back side of the plate-like portion 57A. And an overhanging portion 57B.
The lens insertion hole 571 is positioned on the front surface side and has a size larger than the outer diameter size of the lens barrel 31, and the lens insertion hole 571 is positioned on the rear surface side and has substantially the same size as the outer diameter size of the lens barrel 31. The second lens insertion hole 573 has a stepped shape from the front side to the back side.

Here, three mounting recesses 574 are formed on the inner periphery of the second lens insertion hole 573 corresponding to the three mounting projections 312.
The three mounting recesses 574 are a protrusion insertion part 575 cut out from the front side to the rear side so as to be substantially flush with the inner periphery of the first lens insertion hole 572, and the lens from the back side of the protrusion insertion part 575. A protrusion engaging portion 576 cut out in a clockwise direction when viewed from the front side with the central axis of the insertion hole 571 as the center, and has a substantially L shape.

With the above configuration, the projection lens 3 is attached to the moving member 52 as described below in a state where the attaching member 57 is fixed to the front surface side of the first moving plate 56 by the fixing screw 57C.
That is, the projection lens 3 is held so that the concave portion 311 is positioned on the upper side, and the projection lens 3 is inserted into the lens insertion hole 571 and the opening 561 in a state where the mounting protrusions 312 are aligned with the protrusion insertion portions 575. . When each mounting projection 312 comes into contact with the front end surface of the first moving plate 56, the projection lens 3 is rotated clockwise as viewed from the front side, and each mounting projection 312 is The protrusion engaging portion 576 is moved. In this state, each mounting projection 312 is sandwiched between each projection engaging portion 576 and the front end surface of the first moving plate 56, and the projection lens 3 is attached to the moving member 52. It is done. That is, the projection lens 3 and the moving member 52 are connected with a so-called bayonet structure.

Further, in the plate-like portion 57A, a second support portion 577 that protrudes toward the back side is formed at a position corresponding to the first support portion 562 on the end surface on the back side.
The second support portion 577 is formed in a frame shape corresponding to the outer shape of the lock slider 63, and the first support portion 562 first fixes the first moving plate 56 and the attachment member 57. The urging member 61, the rod 62, and the lock slider 63 are supported. In other words, the first support portion 562 and the second support portion 577 correspond to the storage support portion 52A according to the present invention.
Further, the second support portion 577 is cut out at the upper side wall portion, and communicates with the protrusion engaging portion 576 of the mounting recess 574 corresponding to the mounting protrusion 312A among the three mounting recesses 574 ( (Refer FIG. 11 (B) and FIG. 13 (B)).
Further, in the plate-like portion 57A, a rod insertion portion 578 that has a cylindrical shape protruding toward the front surface side and communicates with the inside of the second support portion 577 is formed on the end surface on the front surface side. The rod insertion part 578 allows the other end of the rod 62 supported by the storage support part 52A to be inserted.

[Configuration of lens attachment / detachment device]
The lens attaching / detaching device 6 attaches / detaches the projection lens 3 to / from the moving member 52. As shown in FIG. 3 or FIG. 4, the lens attaching / detaching device 6 includes a first urging member 61 (FIG. 4), a rod 62 as an operation transmitting member, and a lock slider 63 (FIG. 4) as an engaging member. ), A second urging member 64 (see FIG. 5), and an operation button 65 (FIG. 3) as an operation member.

[Configuration of the first urging member]
As shown in FIG. 4, the first urging member 61 is configured by a coil spring and is housed in the urging member housing portion 563. The first urging member 61 abuts on one end of the rod 62 and urges the rod 62 in the projection direction.

[Rod configuration]
The rod 62 moves in the projection direction by the urging force of the first urging member 61 to move the lock slider 63 to the engagement position P1 (see FIG. 11), and is operated by pressing the operation button 65 by the user. When the button 65 is pressed in the direction opposite to the projection direction, the pressing force of the operation button 65 is converted into an in-plane force orthogonal to the projection direction and transmitted to the lock slider 63, and the lock slider 63 is disengaged from the disengagement position P2. (See FIG. 13).
As shown in FIG. 4, the rod 62 has a bent portion 621 at a substantially central portion, and is formed in a crank shape in which one end side and the other end side extend substantially in parallel along the projection direction.
The bent portion 621 has a substantially quadrangular prism shape extending from the lower right to the upper left from the other end side of the rod 62 toward the one end side. A flat first pressing surface 622 and a second pressing surface 623 are formed on the outer surface of the bent portion 621 and are inclined with respect to a plane that is opposed to each other and orthogonal to the projection direction.
The rod 62 is disposed in the biasing member accommodating portion 563 in a loosely fitted state at one end side, and is accommodated in the accommodating support portion 52A so as to be movable back and forth along the projection direction with the other end side inserted into the rod insertion portion 578. Supported by
The other end of the rod 62 extends along a surface orthogonal to the projection direction, and functions as a button contact surface 624 that contacts the operation button 65.

[Configuration of lock slider]
The lock slider 63 has an upper left engagement position P1 that engages with the engagement recess 3122 of the projection lens 3 or a lower right non-engagement position that does not engage with the engagement recess 3122 within a plane orthogonal to the projection direction. Move to P2.
As shown in FIG. 4, the lock slider 63 is configured by a plate body that extends along a plane orthogonal to the projection direction.
In the lock slider 63, a pair of rail abutting surfaces 631 that abut against the pair of rail portions 564 in a state supported by the storage support portion 52A is formed at the outer peripheral end portion.
In the lock slider 63, an engagement protrusion 632 that engages with the engagement recess 3122 is formed at the upper left end.
The engaging projection 632 has a cross-sectional area that decreases toward the tip, and has an inclined surface 6321 at the outer peripheral end.

Furthermore, a substantially rectangular through-hole 633 is formed in a substantially central portion of the lock slider 63, through which the biasing member storage portion 563 and the rod 62 are inserted while passing through the front and back and being supported by the storage support portion 52A. (See FIGS. 11 and 13).
In the lock slider 63, a rectangular frame-shaped rod guide portion 634 that protrudes from the periphery of the through-hole 633 toward the front surface is formed on the front plate surface.
A first pressure receiving surface 635 and a second pressure receiving surface 636 that are in contact with the first pressing surface 622 and the second pressing surface 623 of the bent portion 621 of the rod 62 are formed on a pair of opposing side walls of the rod guide portion 634. Has been.

[Configuration of second urging member and operation button]
FIG. 5 is a perspective view of the second urging member 64 and the operation button 65 as viewed from the front side.
As shown in FIG. 5, the second urging member 64 is configured by a coil spring and is housed in a U-shaped recess 221 formed on the bottom surface of the lower case 22. The second urging member 64 has one end abutting on the U-shaped base end portion of the recess 221 and the other end abutting on the operation button 65 to urge the operation button 65 in the projection direction.

The operation button 65 is an operation button that is partially exposed from the front surface of the exterior housing 2 and is pressed by the user in the direction opposite to the projection direction when the projection lens 3 is replaced. As shown in FIG. 5, the operation button 65 includes an operation button main body 651 and a contact portion 652.
The operation button main body 651 is exposed from the front surface of the lower case 22 and has a button portion 6511 formed in a plate shape following the surface shape of the front surface, and a substantially rectangular parallelepiped shape integrally formed on the end surface on the back side of the button portion 6511. The connection part 6512 is provided.

Here, the left side surface portion of the connection portion 6512 is formed with a substantially L-shaped operation lock portion 6512A that protrudes to the left and has a tip portion extending in a direction opposite to the projection direction. The operation lock portion 6512A is a portion that disables the operation button 65 from being pressed.
More specifically, when the user cannot press the operation button 65, that is, when the projection lens 3 is prohibited from being exchanged, the user locks the operation lock screw 6512B as shown in FIG. The screw hole 222 formed in the screw 22 is screwed. In this state, the distal end portion of the operation lock screw 6512B protrudes upward from the bottom surface portion of the lower case 22, and is positioned on the back side of the operation lock portion 6512A. Then, when the operation button 65 is pressed, the tip of the operation lock portion 6512A comes into contact with the operation lock screw 6512B, and the operation button 65 cannot be moved in the direction opposite to the projection direction, that is, set in a state in which it cannot be pressed. Is done.

The contact portion 652 is formed integrally with the end surface on the back surface side of the connection portion 6512 and is a portion that contacts the button contact surface 624 of the rod 62 and contacts the other end of the second urging member 64. . As shown in FIG. 5, the contact portion 652 includes a base portion 6521, a rod contact portion 6522, a pair of reinforcing portions 6523, and an urging member contact portion 6524 (see FIGS. 10 and 12). .
As shown in FIG. 5, the base portion 6521 is configured by a substantially rectangular plate body extending along a horizontal plane, and is a portion attached by a fixing screw 65 </ b> A in the recess 221. A track hole 6521A extending along the projection direction is formed in a substantially central portion of the base 6521, and the fixing screw 65A is screwed into the recess 221 through the track hole 6521A. That is, the base 6521 (operation button 65) is attached to be movable along the projection direction.

6 to 9 are views for explaining a contact state between the rod contact portion 6522 and the rod 62. Specifically, FIG. 6 shows a state where the dials 541 and 551 are rotated and the moving member 52 (projection lens 3) is positioned at the upper left end position. FIG. 7 shows a state in which the moving member 52 is positioned at the upper right end position. FIG. 8 shows a state in which the moving member 52 is positioned at the lower right end position. FIG. 9 shows a state in which the moving member 52 is positioned at the lower left end position.
As shown in FIG. 5, the rod abutting portion 6522 is configured by a substantially rectangular plate that protrudes upward from an edge on the back surface side of the base portion 6521. The plate surface on the back side extends along a plane perpendicular to the projection direction and functions as a rod contact surface 6522A that contacts the button contact surface 624 of the rod 62.

The rod contact surface 6522A has a vertical dimension that is a distance between the movement end positions in the vertical direction of the moving member 52 when the first dial 541 is rotated (movable distance in the vertical direction). Are set to be substantially the same as or slightly larger than each other, and the distance between the movement end positions in the left and right direction of the moving member 52 when the second dial 551 is rotated (the left and right direction) Is set to be substantially the same as or slightly larger than the movable distance.
As shown in FIG. 3, the operation button 65 is rotated when the dials 541 and 551 are rotated and the moving member 52 is positioned at the center position of the vertical movement range and at the center position of the horizontal movement range. In the state shown in FIG. 3, the button contact surface 624 is disposed so that the approximate center position of the button contact surface 624 is positioned at the approximate center position of the rod contact surface 6522A.
From the above, as shown in FIG. 6 to FIG. 9, the rod contact surface 6522A and the button contact surface 624 can be used regardless of the position of the moving member 52 when the dials 541 and 551 are rotated. Will come into contact.

As shown in FIG. 5, the pair of reinforcing portions 6523 has a substantially triangular shape that is laid between the left edge and the right edge of the base portion 6521 and the rod contact portion 6522, and increases the strength of the contact portion 652. This is the part to be reinforced.
The urging member abutting portion 6524 is composed of a plate body that protrudes downward from the bottom surface portion of the base portion 6521, and abuts against the other end of the second urging member 64 on the plate surface on the back side (FIG. 10, FIG. (See FIG. 12).

[Operation of lens attachment / detachment device]
Next, the attaching / detaching operation of the projection lens 3 by the lens attaching / detaching device 6 described above will be described.
10 to 13 are diagrams for explaining the attaching / detaching operation of the projection lens 3 by the lens attaching / detaching device 6. Specifically, FIGS. 10 and 11 are diagrams illustrating a normal state in which the operation button 65 is not pressed by the user, and FIGS. 12 and 13 are unlocked states in which the operation button 65 is pressed by the user. FIG. 10 and 12 are main cross-sectional views in which a part of the lens attaching / detaching device 6 is cut as viewed from the right side. Further, FIGS. 11A and 13A are views seen from the front side, and FIGS. 11B and 13B are the XI-XI line of FIG. 11A and FIG. It is sectional drawing of the XIII-XIII line of A).

In the normal state, as shown in FIG. 10, the operation button 65 is urged in the projection direction by the second urging member 64 and is positioned at the initial position.
Similarly, the rod 62 is not pressed in the direction opposite to the projection direction by the rod contact surface 6522A of the operation button 65, as shown in FIG. Energized in the projection direction and positioned at the initial position.
At this time, as shown in FIG. 11, the lock slider 63 is moved to the upper left engagement position P <b> 1 while the first pressing receiving surface 635 is pressed by the first pressing surface 622 of the rod 62 and guided by the pair of rail portions 564. The engaging protrusion 632 engages with the engaging recess 3122 of the projection lens 3.
The engagement between the engagement recess 3122 and the engagement protrusion 632 prevents the projection lens 3 from rotating counterclockwise when viewed from the front side, that is, the projection lens 3 is detached from the moving member 52. It becomes impossible (attached state).

On the other hand, when the operation button 65 is pressed, as shown in FIG. 12, the operation button 65 moves in the direction opposite to the projection direction against the urging force of the second urging member 64, and moves to the rod contact surface 6522 </ b> A. Then, the rod 62 is pressed.
Similarly, the rod 62 moves in the direction opposite to the projection direction against the urging force of the first urging member 61 as shown in FIG.
At this time, as shown in FIG. 13, the lock slider 63 has the second press receiving surface 636 pressed by the second press surface 623 of the rod 62, and is guided to the pair of rail portions 564, while being in the lower right non-engagement position. It moves to P2 and the engagement of the engaging protrusion 632 with respect to the engaging recess 3122 is released (unlocked state).
In the unlocked state, the projection lens 3 can be rotated counterclockwise when viewed from the front side, that is, the projection lens 3 can be detached from the moving member 52.

In the above description, the state in which the projection lens 3 is attached to the moving member 52 and the state in which the projection lens 3 can be detached from the moving member 52 have been described, but when attaching the projection lens 3 to the moving member 52, The lens attaching / detaching device 6 operates as follows.
That is, when the lens attaching / detaching device 6 is positioned in the normal state described above, each mounting projection 312 is inserted into each projection insertion portion 575, and the projection lens 3 is rotated clockwise as viewed from the front side. When the attachment protrusion 312 is moved to each protrusion engagement portion 576, the inclined surface 3121 of the attachment protrusion 312A presses the inclined surface 6321 of the lock slider 63.
The lock slider 63 moves to the lower right while being guided by the pair of rail portions 564 while the engaging protrusion 632 is in sliding contact with the outer peripheral end of the mounting protrusion 312A. When the projection lens 3 is further rotated and the engagement concave portion 3122 is positioned at the distal end position of the engagement projection 632, the pressing from the mounting projection 312A to the lock slider 63 is released, and the lock slider 63 is moved to the first position. The urging force of the urging member 61 moves to the upper left engagement position P1 while being guided by the pair of rail portions 564, and the engagement protrusion 632 engages with the engagement recess 3122 (state shown in FIGS. 10 and 11). ).

The embodiment described above has the following effects.
In the present embodiment, the projector 1 includes the lens attaching / detaching device 6 having the first urging member 61, the rod 62, the lock slider 63, and the operation button 65. The projection lens 3 can be easily attached to and detached from the projection position adjusting device 5 from the outside of the body 2.
The projection lens 3 is attached to the moving member 52 of the projection position adjusting device 5. Accordingly, the projection position can be adjusted by rotating the dials 541 and 551 to move the moving member 52.
Here, the rod contact surface 6522A of the operation button 65 is set so that the vertical dimension is substantially the same as or slightly larger than the distance between the movement end positions in the vertical direction of the moving member 52. The length dimension in the direction is set to be substantially the same as or slightly larger than the distance between the movement end positions in the left-right direction of the moving member 52. Thereby, even when the moving member 52 is moved, it is possible to realize a configuration in which the operation button 65 and the rod 62 are always in contact with each other. In other words, the projection lens 3 can be removed from the projection position adjusting device 5 by pressing the operation button 65 regardless of the position of the projection lens 3.

  Further, since the rod 62 has the pressing surfaces 622 and 623, an operation transmitting member that converts the pressing force of the operation button 65 into a force in an in-plane direction orthogonal to the projection direction and transmits the force to the lock slider 63 is provided. The lock slider 63 can be easily moved to the engagement position P1 and the non-engagement position P2.

  Further, the lock slider 63 is formed with a slope 6321 and is configured such that the engaging protrusion 632 can protrude and retract into the protrusion engaging portion 576 while being supported by the storage support portion 52 </ b> A of the moving member 52. . Accordingly, the projection lens 3 can be attached to the moving member 52 by rotating the projection lens 3 without pressing the operation button 65 to move the lock slider 63 to the non-engagement position. Further improvement in performance can be achieved.

  Further, since the mounting projection 312A and the engagement projection 632 abut within the projection engagement portion 576, the user feels a load on the hand when the projection lens 3 is inserted into the lens insertion hole 571. When the projection lens 3 is rotated and the attachment projection 312A is inserted through the projection engagement portion 576, a load is felt on the hand due to the contact between the attachment projection 312A and the engagement projection 632. . For this reason, for example, as compared with a configuration in which a load is felt on the hand when the projection lens 3 is inserted into the lens insertion hole 571, the projection lens 3 is more reliably prevented from being left in an incorrect mounting state. 3 can be attached to the moving member 52.

It should be noted that 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 above-described embodiment, the rod contact surface 6522A of the operation button 65 is set to a size corresponding to the movable range of the moving member 52. However, the present invention is not limited to this, and the button contact surface 624 of the rod 62 is rod contacted. You may comprise the same size as the surface 6522A. At this time, the rod contact surface 6522A of the operation button 65 may be configured to have a size smaller than the dimension described in the embodiment, for example, the same size as the button contact surface 624.

In the above-described embodiment, the operation button 65 is provided so as to be exposed on the front surface of the exterior housing 2 and is pressed in the direction opposite to the projection direction, but is not limited thereto.
For example, the operation button may be provided so as to be exposed on the bottom surface, the top surface, or the side surface of the exterior housing 2 and pressed in the direction opposite to the projection direction.
Further, for example, the operation button may be provided so as to be exposed on the top surface, the bottom surface, or the side surface of the exterior housing 2 and may be configured to be pressed in the vertical direction or the horizontal direction. At this time, in addition to the operation button, a member that converts the pressing force in the vertical direction or the left-right direction into a force along the projection direction and transmits it to the rod 62 is provided as the operation member. As the member, for example, a configuration in which the rod 62 and the lock slider 63 described in the above embodiment are connected to the rod 62 can be adopted.

In the above-described embodiment, the projection lens 3 and the moving member 52 are connected by a bayonet connection structure. However, the present invention is not limited to this, and other connection structures may be adopted.
In the above-described embodiment, the projection position adjusting device 5 is configured to move the projection lens 3 in the two directions of the vertical direction and the horizontal direction. However, the present invention is not limited to this, and the projection lens 3 is limited to only one direction in the vertical direction or the horizontal direction. It is good also as a structure which moves.

In the above-described embodiment, a transmissive liquid crystal panel is used as the light modulation device. However, the present invention is not limited to this, and a reflective liquid crystal panel or DMD (Digital Micromirror Device) (trademark of Texas Instruments Inc., USA) is used. ) Etc. may be adopted.
In each of the embodiments, only the example of the front projection type projector has been described. However, the present invention is also applicable to a rear type projector that includes a screen and performs projection from the back side of the screen.

  INDUSTRIAL APPLICABILITY Since the projection position can be adjusted, the projection optical device can be replaced, and convenience can be improved, the present invention can be used for a projector used for a presentation or a home theater.

FIG. 2 is a perspective view illustrating an appearance of a projector according to the present embodiment. The figure which shows typically the apparatus main body accommodated in the inside of the exterior housing | casing in the said embodiment. The perspective view which shows the structure of the projection position adjustment apparatus and lens attachment / detachment apparatus in the said embodiment. The disassembled perspective view which looked at a part of moving member and lens attachment / detachment apparatus in the said embodiment from the front side. The perspective view which looked at the 2nd energizing member and operation button in the above-mentioned embodiment from the front side. The figure for demonstrating the contact state of the rod contact part and rod in the said embodiment. The figure for demonstrating the contact state of the rod contact part and rod in the said embodiment. The figure for demonstrating the contact state of the rod contact part and rod in the said embodiment. The figure for demonstrating the contact state of the rod contact part and rod in the said embodiment. The figure for demonstrating the attachment or detachment operation | movement of the projection lens by the lens attachment or detachment apparatus in the said embodiment. The figure for demonstrating the attachment or detachment operation | movement of the projection lens by the lens attachment or detachment apparatus in the said embodiment. The figure for demonstrating the attachment or detachment operation | movement of the projection lens by the lens attachment or detachment apparatus in the said embodiment. The figure for demonstrating the attachment or detachment operation | movement of the projection lens by the lens attachment or detachment apparatus in the said embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Exterior housing, 2A ... Opening part for exposure, 3 ... Projection lens (projection optical apparatus), 5 ... Projection position adjustment apparatus, 6 ... Lens attachment / detachment Device: 31 ... barrel, 52 ... moving member, 52A ... storage support, 61 ... first urging member, 62 ... rod (operation transmitting member), 63 ... Lock slider (engagement member), 65 ... operation button (operation member), 312 ... mounting projection, 571 ... lens insertion hole, 575 ... projection insertion portion, 576 ... projection engagement Joint part, 621 ... Bending part, 622, 623 ... Press surface, 624 ... Button contact surface, 633 ... Through hole, 3122 ... Recess for engagement, 6522A ... Rod contact Surface, 6321 ... slope, P1 ... engagement position, P2 ... non-engagement position.

Claims (3)

A projection optical device for enlarging and projecting image light, a projection position adjusting device for supporting the projection optical device and having a moving member that moves in a plane orthogonal to the projection direction, and adjusts the projection position of the projection optical device; A projector comprising an exterior housing for housing the projection optical device and the projection position adjusting device;
On the outer surface of the projection optical device is formed a recess for engagement that is recessed toward the inside,
An attachment / detachment device for attaching / detaching the projection optical device to / from the moving member;
The detachable device is
An engagement member that is supported by the moving member and moves between an engagement position that engages with the engagement recess in a plane orthogonal to the projection direction, and an engagement position that does not engage with the engagement recess; An urging member that is supported by the moving member and urges the engaging member toward the engaging position, an operation member that is exposed from the exterior housing and that is pressed, and is supported by the moving member. An operation transmission member that moves forward and backward along the projection direction,
The operation transmitting member is pressed in the direction opposite to the projection direction by the operation member when the operation member is pressed, and the pressing force of the operation member is a force in an in-plane direction orthogonal to the projection direction. Converted to the engagement member, transmitted to the engagement member, the engagement member is moved to the non-engagement position against the urging force of the urging member,
The operation member and the operation transmission member have contact surfaces that extend along surfaces orthogonal to the projection direction and contact each other,
At least one of the contact surfaces has a length dimension along the moving direction of the moving member set to be greater than or equal to a separation dimension between the moving end positions of the moving member. The projector according to claim 1, wherein
The operation transmission member is composed of a rod extending along the projection direction,
The rod is formed in a crank shape having a bent portion,
On the outer surface of the bent portion, a pair of pressing surfaces that are inclined with respect to a plane orthogonal to the projection direction and are opposed to each other are formed.
The engagement member is formed with a through-hole that penetrates in the projection direction so that the rod can be inserted, and a peripheral edge abuts against the pair of pressing surfaces. In the projector according to claim 1 or 2,
The projection optical device includes a cylindrical barrel that houses a plurality of lenses therein,
On the outer periphery of the lens barrel, a mounting projection having the engaging recess at the tip is formed,
The moving member is formed with a circular insertion hole through which the lens barrel can be inserted,
On the inner periphery of the insertion hole, there is a projection insertion part that is cut out along the projection direction so that the attachment projection part can be inserted, and a tube axis that is connected to the projection insertion part and is centered on the cylindrical axis of the lens barrel And a protrusion engaging portion that is cut out in the rotation direction and allows the mounting protrusion to be inserted,
The moving member has a storage support portion that communicates with the protrusion engaging portion, and stores and supports the engaging member so that a part of the engaging member can protrude and retract into the protrusion engaging portion.
The engaging member is inclined so as to gradually approach the protrusion insertion portion along the rotation direction, the projection optical device is rotated in the rotation direction, and the attachment protrusion portion is inserted into the protrusion engagement portion. The projector is characterized in that an inclined surface that abuts against the mounting projection when formed is formed.

Images