JP2009217214A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector capable of suppressing infiltration of dust when it is not used by switching an aperture to a closed state and an opened state by easy operation even in a state where it is installed on a ceiling. <P>SOLUTION: The projector includes: an optical modulation device for modulating luminous flux emitted from a light source in accordance with image information to form image light; a projection lens 34 for projecting the image light; and an external case 2, for housing the optical modulation device and the projection lens 34, having the aperture 211 communicating with the outside, and projects the image light in such posture that is suspended from the ceiling. The projector also includes: a covering member 4 capable of covering the aperture 211; an opening/closing mechanism part 5, coupled with the covering member 4, for guiding the covering member 4 to open/close the aperture 211; and an operation part 6, having a string member 61 whose one end is joined with the covering member 4 and whose other end is exposed from the external case 2, for switching the opening/closing state of the aperture 211 by pulling the other end side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a projector that projects image light.

A projector is an optical device that modulates a light beam from a light source according to image information by a light modulation device and projects the modulated image light onto a screen or the like by a projection optical device. And it is used with the attitude | position mounted on the desk etc. and the attitude | position installed in the ceiling for various uses, such as a presentation in a company and a movie appreciation in a home.
The exterior housing that houses the device main body such as the light modulation device and the projection optical device has an opening for allowing the image light projected by the projection optical device to pass through, and the warm air inside the light source when it is turned on. An opening for discharging is provided. Since these openings communicate with the outside of the exterior casing, there is a possibility that dust mixed in the outside air enters the exterior casing from this opening. There is a problem that the image quality of the projected image is deteriorated when the dust entering the outer casing adheres to an optical component such as a light modulator.

Therefore, in order to suppress the intrusion of dust when not in use, a projector has been proposed in which a shutter is provided in front of the opening, the opening is opened when in use, and the opening is closed when not in use. (See Patent Document 1).
The technique of Patent Document 1 includes first and second shutters for opening and closing openings provided in front of a projection optical device (projection lens) and behind a light source (light source lamp), respectively. Then, the shutters are opened and closed by operating the handles provided on the first and second shutters, respectively.

JP 2000-305175 A

  However, since the technique described in Patent Document 1 opens and closes the shutter by operating the handle, in many cases, the hand of the operator cannot be reached when the projector is suspended from the ceiling. Therefore, since it is necessary to operate using a step board etc., there exists a subject that it is difficult to operate easily. Moreover, when operating using a step stool etc., since it lacks stability, there is a concern that an operator may be dangerous.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

Application Example 1 A projector according to this application example includes a light modulation device that modulates a light beam emitted from a light source according to image information to form image light, a projection optical device that projects the image light, A projector that houses the light modulation device and the projection optical device, includes an exterior housing having an opening communicating with the outside, and capable of projecting the image light in a ceiling-suspended posture suspended from a ceiling; A closing member capable of closing the opening; an opening / closing mechanism connected to the closing member, for guiding the closing member to open and close the opening; and one end connected to the closing member or the opening / closing mechanism, The other end has a string-like member exposed from the exterior casing, and includes an operation unit that switches the open / closed state of the opening by pulling the other end.
Here, the opening that communicates with the outside is an opening that is provided in the exterior casing and through which the image light projected from the projection optical device passes, an opening for exhausting air in the exterior casing, and the like It is an opening formed to allow air to flow.

  According to this configuration, the projector includes the closing member capable of closing the opening, the opening / closing mechanism connected to the closing member, and the operation unit having the string-like member exposed from the exterior housing. When the string-like member is pulled, the opening / closing mechanism unit guides the closing member to open / close the opening. As a result, even when the projector is suspended from the ceiling, i.e., installed on the ceiling away from the user, the opening can be easily operated by pulling the string-like member without using a step board or the like. Can be opened and closed. Therefore, when the projector is not in use, the opening can be closed by a simple operation to suppress the intrusion of dust, so that the deterioration of the image quality of the projected image can be suppressed and the product life can be extended. It becomes. Further, power is not used compared to a configuration in which the opening is electrically opened and closed by a remote operation using a remote controller or the like, so that power saving can be achieved.

  Application Example 2 In the projector according to the application example, it is preferable that the opening / closing mechanism unit opens and closes the opening through which the image light passes.

The opening through which the image light passes is provided on the exit side of the projection optical apparatus, and the light modulation device is disposed on the incident side of the projection optical apparatus. That is, the opening through which the image light passes is provided in the vicinity of the projection optical device and the light modulation device, and the dust that has entered from the opening is more likely to adhere to the light modulation device and the projection optical device. Become. Since the light modulation device is a device that forms image light, and the projection optical device is a device that projects this image light, if dust adheres to these devices, the quality of the projected image is significantly reduced.
According to this configuration, since the opening / closing mechanism opens and closes the opening through which the image light passes, it is possible to more effectively suppress the intrusion of dust that degrades the image quality of the projected image.

  Application Example 3 In the projector according to the application example described above, it is preferable that the opening / closing mechanism portion opens and closes the opening portion by guiding the closing member in a substantially horizontal direction in the ceiling suspension posture.

  According to this configuration, the opening / closing mechanism portion opens and closes the opening portion by guiding the closing member in a substantially horizontal direction in the ceiling suspension posture, that is, in a direction substantially orthogonal to the thickness direction of the projector. As a result, it is not necessary to secure a space for housing the closing member in the thickness direction of the projector, so that the product can be made thinner.

  Application Example 4 In the projector according to the application example, it is preferable that the operation unit includes an adjustment unit that adjusts the length of the string-like member.

  According to this configuration, since the operation unit includes the adjustment unit that adjusts the length of the string-like member, the length of the string-like member exposed from the exterior housing according to the height of the projector suspended from the ceiling. It is possible to improve the operability by adjusting the height.

  Application Example 5 In the projector according to the application example described above, the opening / closing mechanism section restricts the position of the closing member and opens the opening, and the second position closes the opening. It is preferable to have a guide body that guides the closing member so as to be movable between and a valve portion that holds the closing member in the first position or the second position.

  According to this configuration, the opening / closing mechanism has the guide body that guides the closing member so that it can move between the first and second positions. Therefore, the closing member smoothly moves between the respective positions. Can be moved to. In addition, since the opening / closing mechanism has the valve portion that holds the closing member at the first or second position, it is possible to stably maintain the state of opening or closing the opening. .

Hereinafter, the projector according to the present embodiment will be described with reference to the drawings.
The projector according to the present embodiment is an optical device that modulates a light beam emitted from a light source according to image information using a light modulation device, and projects the modulated image light onto a screen or the like. In addition, the projector according to the present embodiment can project image light in a ceiling-suspended posture suspended from the ceiling.

1 and 2 are perspective views showing an appearance of the projector according to the present embodiment in a state where the projector is installed in a ceiling position. Specifically, FIG. 1 is a perspective view of the projector as viewed from the upper front side, and FIG. 2 is a perspective view of the projector as viewed from the upper rear side. In the following, for convenience of explanation, in the drawing view of FIG. 1, the right is described as “right” (+ X direction), the front as “front” (+ Y direction), and the upper as “up” (+ Z direction).
As shown in FIGS. 1 and 2, the projector 1 has a configuration in which a main body is surrounded by an exterior casing 2 that constitutes an exterior.
The exterior housing 2 is made of synthetic resin, and includes an upper case 21 that constitutes the lower side and a lower case 22 that constitutes the upper side. The upper case 21 and the lower case 22 are fixed with screws or the like.

The upper case 21 includes a lower surface 21A, a front surface 21B, a right side surface 21C, a left side surface 21D, and a back surface 21E.
A substantially square opening 211 is formed in the front surface 21 </ b> B, and the projection lens 34 is disposed inside the opening 211. The image light projected from the projection lens 34 passes through the opening 211.
An air inlet 212 having a plurality of rectangular openings is formed on the side surface 21 </ b> C, and the interior of the exterior housing 2 is cooled by air taken from the air inlet 212. In addition, a dustproof filter (not shown) is disposed inside the air inlet 212 to prevent dust mixed in outside air from entering the exterior housing 2.

  As shown in FIG. 2, an exhaust port 213 having a plurality of rectangular openings is formed near the side surface 21D of the back surface 21E, and the exterior is warmed as the light source 311 (see FIG. 3) is turned on. Air in the housing 2 is discharged to the outside from the exhaust port 213. A substantially rectangular recess 214 is formed adjacent to the exhaust port 213, and a plurality of holes are provided in the recess 214. From this hole, a plurality of connection terminals for connection to an external electronic device are exposed.

  The lower case 22 is configured to have an upper surface 22A, and the surface 22A has a rectangular opening for accommodating the light source device 31 (see FIG. 3) at a corner near the side surface 21D and the back surface 21E. The lamp cover 23 covering the opening is detachably provided.

Next, a schematic configuration of the projector 1 will be described with reference to FIG.
FIG. 3 is a plan view schematically showing a schematic configuration of the projector 1.
As shown in FIGS. 1 and 3, the projector 1 includes an exterior housing 2, a substantially L-shaped optical unit 3, a closing member 4, an opening / closing mechanism unit 5, and an operation unit 6. Has been. Although not shown in the drawings, in the exterior housing 2, in addition to the above-described components, a cooling fan that cools each component in the projector 1, a control unit that performs various processes on image information, and a control unit It is assumed that a power supply unit for supplying power to the etc. is arranged.

  The optical unit 3 is a unit that forms and projects image light corresponding to image information by optically processing the light beam emitted from the light source 311 under the control of the control unit. The optical unit 3 includes a light source device 31 having a light source 311, a color separation optical device 32, an optical device 33, and a projection lens 34 as a projection optical device.

The color separation optical device 32 separates the light beam emitted from the light source 311 into three color lights of red, green, and blue, and emits each color light to the optical device 33.
The optical device 33 includes an incident-side polarizing plate 331, a liquid crystal panel 332 as a light modulation device, an emission-side polarizing plate 333, and a cross dichroic prism 334 as a color combining optical device, and each color light emitted from the color separation optical device 32. Is modulated in accordance with image information to form image light.
The projection lens 34 is configured as a combined lens in which a plurality of lenses are combined, and enlarges and projects the image light emitted from the optical device 33 onto a screen (not shown) or the like.

  The closing member 4, the opening / closing mechanism 5, and the operation unit 6 are arranged on the inner surface side of the front surface 21 </ b> B of the upper case 21, and the closing member 4 is moved in the left-right direction via the opening / closing mechanism 5 by the operation of the operation unit 6. ± X direction), that is, it can be moved in a substantially horizontal direction in the ceiling hanging posture. The opening 211 is opened and closed by the movement of the closing member 4, and the open / closed state is switched between an open state in which the opening 211 is opened and a closed state in which the opening 211 is closed.

FIG. 4 is a perspective view schematically showing a schematic configuration of the closing member 4, the opening / closing mechanism unit 5, and the operation unit 6, and is a diagram showing an open state.
As shown in FIG. 4, the closing member 4 is arranged on the front left side of the projection lens 34 in the open state.
The opening / closing mechanism 5 is connected to the closing member 4 and disposed below the projection lens 34. The opening / closing mechanism 5 is configured to guide the closing member 4 so that the closing member 4 can move between the open state and the closed state, and to maintain the state in the closed state.
The operation unit 6 includes a string-like member 61, and one end of the string-like member 61 is locked to the closing member 4 and the other end is exposed from the exterior casing 2 (FIG. 1). reference). The operation unit 6 switches the opening / closing mechanism unit 5 between an open state and a closed state by pulling the other end of the string-like member 61 downward (−Z direction).

Here, the details of the closing member 4, the opening / closing mechanism unit 5, and the operation unit 6 will be described.
5 and 6 are diagrams showing the closing member 4, the opening / closing mechanism unit 5, and the operation unit 6 in the opened state. Specifically, FIG. 5 is a front view seen from the front side, and FIG. 6 is a ZZ cross-sectional view in FIG.
As shown in FIGS. 5 and 6, the closing member 4 includes a rectangular opening / closing body 41 that is larger than the opening 211, a right side (+ X direction) below the opening / closing body 41 (−Z direction), and a back direction (−Y direction). ) And a projecting portion 42 having a rectangular parallelepiped shape. The protrusion 42 is formed with a round hole 42A penetrating in the left-right direction (± X direction) and a long hole 42B having an opening on the lower side (−Z direction) and having a long front-rear direction (± Y direction). .

The opening / closing mechanism 5 includes a connecting part 51, a guide part 52, a guide shaft 53, and a compression coil spring 54.
The connecting portion 51 is connected to the closing member 4 and is configured to move together with the closing member 4 in the left-right direction. Specifically, as shown in FIGS. 5 and 6, the connecting portion 51 has a spherical portion 511 whose tip is formed in a substantially spherical shape, and a cylindrical shape whose diameter is slightly smaller than the horizontal dimension of the long hole 42 </ b> B. The shaft portion 512 is configured. The connecting portion 51 is inserted so that the shaft portion 512 has little play in the left-right direction with respect to the elongated hole 42B, and can slide in the longitudinal direction (± Y direction) along the elongated hole 42B. Yes.

FIG. 7 is a plan view of the guide portion 52 as viewed from above.
As shown in FIG. 7, the guide part 52 includes a guide body 521 and valve parts 526, 527 A, and 527 B.
The guide body 521 has a function of guiding the closing member 4 and is configured such that the connecting portion 51 connected to the closing member 4 is inserted and the connecting portion 51 can move.
The guide body 521 has an annular shape in which passages 522 and 523 formed by two long pipe-like members and passages 524 and 525 formed by two short pipe-like members communicate with each other through an internal hollow portion. And is fixed to the upper case 21. Specifically, the guide body 521 is arranged such that the passage 522 is arranged in the rear and the passage 523 is arranged in front, and the passage 524 is inclined rightward from the right end of the passage 522 to the front and is connected to the vicinity of the right end of the passage 523. The passage 525 is inclined to the left from the left end of the passage 523 toward the rear and is connected to the vicinity of the left end of the passage 522.

In the upper part of the guide body 521, a slit 521A having a width slightly larger than the diameter of the shaft portion 512 is formed in an annular shape along the passages 522 to 525.
In the connecting portion 51, the spherical portion 511 is inserted into the hollow portion in the guide body 521, the shaft portion 512 is inserted into the slit 521A, and the passage 522 to the passage 525 can move along the slit 521A. The guide body 521 guides the closing member 4 to move between the open state and the closed state by moving the connecting portion 51 through the passages 522 to 525.

The valve portions 526, 527A, and 527B are disposed at predetermined positions of the guide body 521, and have a function of allowing the connecting portion 51 to pass in one direction and restricting passage in the opposite direction.
First, the valve portion 526 will be described.
As shown in FIG. 7, the valve portion 526 is provided in the vicinity of the right end in the passage 522, and passes through the connecting portion 51 that moves from the left side to the right direction with respect to the valve portion 526, and from the right side to the left direction It is provided so that the moving connecting portion 51 is locked and the closing member 4 is held in the closed state.
8 is a plan view showing the valve portion 526, and is an enlarged view of a portion A in FIG.
As shown in FIG. 8, the valve portion 526 includes a pair of movable pieces 5261 and 5262, a fixed shaft 528, a protruding portion 529, and a pair of urging portions (not shown).

The movable piece 5261 is formed of a rectangular plate material, a round hole is formed in a substantially central part, one end surface 5261A in the longitudinal direction is flat, and the other end surface is an end surface that is inclined so that the outside is thin. 5261B.
The movable piece 5262 is formed symmetrically with respect to the movable piece 5261, and has a flat end surface 5262A and an inclined end surface 5262B.
A pair of the fixed shaft 528 and the protruding portion 529 are provided in the passage 522 at positions symmetrical with respect to the central shaft 522C in the view of FIG. The protrusion 529 has a cylindrical shape, and is provided on the outer side to the right with respect to the fixed shaft 528.

The movable pieces 5261 and 5262 are supported by passing round holes through the fixed shaft 528 so that the end surfaces 5261A and 5262A face the right direction (+ X direction) and the end surfaces 5261B and 5262B are on the center axis 522C side. . 8, the movable piece 5261 rotates clockwise about the fixed shaft 528 (in the direction of arrow R1 in FIG. 8), and the movable piece 5262 rotates counterclockwise (in the direction of arrow R2 in FIG. 8). It is urged by the urging unit to move.
The movable pieces 5261 and 5262 are in a static posture in which the end surfaces 5261A and 5262A are in contact with the protrusions 529 and the rotation is restricted. In this static posture, the movable pieces 5261 and 5262 are such that the end surfaces 5261A and 5262A are substantially along the front-rear direction (± Y direction). In this static posture, the gap between the movable piece 5261 and the movable piece 5262 is smaller than the outer shape of the connecting portion 51.

Here, the operation of the valve portion 526 will be described.
As shown in FIG. 8, the connecting portion 51 that has moved from the left side of the valve portion 526 abuts on the end surface 5261B and the end surface 5262B (position P52 in FIG. 8). When the connecting portion 51 presses the movable pieces 5261 and 5262, the movable pieces 5261 and 5262 rotate (indicated by two-dot chain lines in FIGS. 7 and 8), and the gap between them becomes wider. The part 51 passes through the valve part 526. The movable pieces 5261 and 5262 are urged by the urging unit and return to the static posture after the connecting portion 51 passes.

On the other hand, the connecting portion 51 that has moved from the right side of the valve portion 526 abuts on the end surface 5261A and the end surface 5262A (position P53 in FIG. 8). Since the movable pieces 5261 and 5262 are restricted from rotating by the protrusions 529, the connecting portion 51 is held in this state.
Thus, the valve part 526 passes the connecting part 51 moved from the left side, and locks the connecting part 51 moved from the right side.

Next, the valve portions 527A and 527B will be described.
As shown in FIG. 7, the valve portion 527 </ b> A is provided at a portion where the passage 524 and the passage 523 intersect. The valve portion 527A is composed of one movable piece 5271 while the valve portion 526 is composed of two movable pieces 5261 and 5262. Then, similarly to the valve portion 526, the valve portion 527A allows the connecting portion 51 that has moved from one direction to pass therethrough and restricts the passage of the connecting portion 51 that moves from the opposite direction. Specifically, the valve portion 527A is biased so as to close the passage 524 when the movable piece 5271 is in a static posture, and the connecting portion 51 that moves from the passage 524 toward the passage 523 is connected to the movable piece 5271. It is allowed to pass by turning and restricts movement in the direction opposite to that.

The valve portion 527B is configured in the same manner as the valve portion 527A, and is provided at a portion where the passage 525 and the passage 522 intersect. Specifically, the valve portion 527B is biased so as to close the passage 525 when the movable piece 5271 is in a static posture, and the connecting portion 51 that moves from the passage 525 toward the passage 522 is connected to the movable portion 5271. It is allowed to pass by turning and restricts movement in the direction opposite to that.
Thus, the guide part 52 is comprised so that the connection part 51 can move cyclically | annularly (passage 522-passage 524-passage 523-passage 525-passage 522). Moreover, the guide part 52 is comprised so that the connection part 51 can move this ring shape clockwise in the drawing view in FIG. 7, and cannot move counterclockwise.

Next, the guide shaft 53 and the compression coil spring 54 will be described.
Returning to FIG. 5, the guide shaft 53 is inserted into the round hole 42 </ b> A of the closing member 4, and both ends are held by the right standing wall 215 </ b> R and the left standing wall 215 </ b> L provided in the upper case 21.
The compression coil spring 54 is disposed between the right side surface of the closing member 4 and the standing wall 215R through the guide shaft 53 inserted into the closing member 4, and biases the closing member 4 leftward. The compression coil spring 54 is set such that the force for urging the closing member 4 is larger than the force for urging the movable piece 5271 in the valve portion 527B.
The closing member 4 is urged by the compression coil spring 54 so that the left side surface of the protrusion 42 abuts against the standing wall 215L, and is positioned at the open position (first position) where the opening 211 is opened. In this open state, the connecting portion 51 connected to the closing member 4 is located near the left end of the guide portion 52 (position P51 in FIG. 5).

Next, the operation unit 6 will be described.
As shown in FIG. 5, the operation unit 6 includes a string-like member 61, a guide roller 62, a handle portion 63, and an adjustment unit 64.
One end of the string-like member 61 is secured above the round hole 42A of the protrusion 42, and the other end is provided at a corner (see FIG. 1) close to the side surface 21C and the front surface 21B of the surface 21A of the upper case 21. It is exposed from a hole (not shown).
The guide roller 62 is pivotally attached to the vicinity of the right edge of the upper case 21, guides the string-like member 61 fixed to the protrusion 42 to the right edge, and further changes the direction downward. I am guiding you so.
The handle portion 63 has a not-shown concavo-convex shape on which a finger can be put so as to easily pull the string member 61, and is attached to the other end of the string member 61.

The adjustment unit 64 has a function of adjusting the length of the string-like member 61 exposed from the upper case 21 and is attached to the string-like member 61 exposed from the case. The adjusting portion 64 is formed in a cylindrical container shape so that the string-like member 61 can be accommodated therein, and is configured to be opened and closed at a substantially central portion.
FIG. 9 is a perspective view showing a state in which the adjustment unit 64 is opened.
As shown in FIG. 9, the adjustment unit 64 includes a winding body 641 and a lid 642. The take-up body 641 is provided with a take-up shaft 643 at a substantially central portion, and two grooves 644 are formed at substantially symmetric positions on the outer edge. The lid 642 is configured to be openable and closable with respect to the winding main body 641.
The adjustment unit 64 stores the string-shaped member 61 by winding the string-shaped member 61 around the winding shaft 643, pushing both ends of the wound string-shaped member 61 into the grooves 644 and closing the lid 642. .

Next, operations of the closing member 4, the opening / closing mechanism unit 5, and the operation unit 6 will be described with reference to FIGS. 5 and 7 and FIG. 10.
FIG. 10 is a diagram showing the closing member 4 and the opening / closing mechanism 5 in the closed state.
As shown in FIG. 5, in the open state, as described above, the closing member 4 is disposed at the first position together with the connecting portion 51.
When the string-like member 61 is pulled by a force greater than the force urging the compression coil spring 54 from this open state, the closing member 4 is pulled by the string-like member 61 and moves to the right. As shown in FIGS. 5 and 7, when the closing member 4 moves, the connecting portion 51 connected to the closing member 4 moves along the slit 521 </ b> A along the slit 521 </ b> A from the left to the right. The connecting portion 51 together with the closing member 4 is pulled to the right side of the passage 522 and reaches the valve portion 526.

  The connecting portion 51 that has reached the valve portion 526 presses and turns the movable pieces 5261 and 5262 from the left side, and passes through the valve portion 526. When the pulling of the string-like member 61 is stopped after the connecting portion 51 has passed through the valve portion 526, the closing member 4 is biased by the compression coil spring 54 and thus moves to the left. As described above, the closing member 4 is held at this position (second position) together with the connecting portion 51 by locking the connecting portion 51 to the valve portion 526 (the position in FIGS. 7 and 10). P53). This state is a state in which the closing member 4 closes the opening 211, that is, a closed state.

When the string-like member 61 is pulled from this closed state, the connecting portion 51 moves from the passage 522 to the passage 524 along the slit 521A as shown in FIG. At this time, in the connecting portion 51, the shaft portion 512 gradually moves from the rear to the front through the long hole 42B with respect to the closing member 4 (see FIG. 6).
The connecting portion 51 moved to the passage 524 moves smoothly through the passage 524 and contacts the valve portion 527A because the passage 524 is inclined rightward toward the front. Then, the connecting portion 51 presses and rotates the movable piece 5271, passes through the valve portion 527 </ b> A, and enters the passage 523. And the connection part 51 reaches the right end vicinity of the channel | path 523 with the closure member 4 (position P55 in FIG. 7, FIG. 10).

When traction is stopped from this state, the connecting portion 51 moves to the left together with the closing member 4 because the closing member 4 is urged by the compression coil spring 54. Since the connecting portion 51 is restricted from entering the passage 524 by the valve portion 527A, the connecting portion 51 moves along the slit 521A and enters the passage 525 from the vicinity of the left end of the passage 523.
And since the channel | path 525 inclines to the left side toward back, the connection part 51 moves smoothly the channel | path 525, and contact | abuts to the valve part 527B. When the connecting portion 51 moves in the passage 525, the shaft portion 512 gradually moves from the front to the rear through the long hole 42B with respect to the closing member 4 (see FIG. 6).
The connecting portion 51 in contact with the valve portion 527B presses and rotates the movable piece 5271 to pass through the valve portion 527B, enters the passage 522, and moves leftward. Then, the closing member 4 is positioned at the first position with the left side surface of the protrusion 42 abutting against the standing wall 215L. This state is an open state in which the opening 211 is opened again.
As described above, the closing member 4 is moved in the left-right direction (± X direction) via the opening / closing mechanism unit 5 when the string-like member 61 is pulled, and is switched between the open state and the closed state.

As described above, according to the projector 1 of the present embodiment, the following effects can be obtained.
(1) According to the projector 1 of the present embodiment, the closing member 4 is switched between the closed state and the open state by operating the opening / closing mechanism unit 5 by pulling the string-like member 61. Thus, even when the projector 1 is suspended from the ceiling, that is, when the projector 1 is installed on the ceiling away from the user, the simple operation of pulling the string-like member 61 without using a step or the like. Can be switched between a closed state and an open state. Therefore, when the projector 1 is not used, the opening 211 can be closed by a simple operation to suppress the intrusion of dust, so that the deterioration of the image quality of the projected image can be suppressed and the product life can be extended. Is possible.

  (2) According to the projector 1 of the present embodiment, the closing member 4 opens and closes the opening 211 through which the image light passes, and thus more effectively suppress the intrusion of dust that degrades the image quality of the projected image. It becomes possible.

  (3) According to the projector 1 of the present embodiment, power is not used compared to a configuration in which the closing member 4 is electrically opened and closed by a remote operation by a remote controller or the like, so that power saving can be achieved. In addition, since circuit parts such as a motor for driving the closing member 4 are not required, the cost and weight can be reduced, and a space for arranging circuit parts such as a motor is not required, so that space can be saved. Become.

  (4) According to the projector 1 of the present embodiment, the closing member 4 moves in a substantially horizontal direction in the ceiling suspension position, that is, in a direction substantially orthogonal to the thickness direction of the projector 1, thereby closing and opening the closing member 4. And are switched. As a result, it is not necessary to secure a space for storing the closing member 4 in the thickness direction of the projector 1, so that the product can be thinned.

  (5) According to the projector 1 of the present embodiment, since the operation unit 6 includes the adjustment unit 64, the string-like member exposed from the exterior housing 2 according to the height of the projector 1 suspended from the ceiling. It is possible to improve the operability by adjusting the length of 61.

  (6) According to the projector 1 of the present embodiment, since the opening / closing mechanism has the connecting part 51 and the guide body 521, the closing member can be smoothly moved between the first position and the second position. Can be moved. Further, since the opening / closing mechanism section has the valve section 526, it is possible to stably maintain the closed state.

  (7) According to the projector 1 of the present embodiment, the opening / closing mechanism unit 5 can be switched between the closed state and the opened state only by the operation of pulling the string-like member 61, so that the user moves the string-like member 61. It is possible to open or close the opening 211 simply by pulling, and it is possible to improve convenience.

  (8) According to the projector 1 of the present embodiment, the string-like member 61 is exposed from a corner hole adjacent to the side surface 21C and the front surface 21B of the surface 21A, that is, from a position away from the intake port 212 and the exhaust port 213. Therefore, it is less likely to fluctuate due to the air flow caused by intake and exhaust, and image light can be projected without causing discomfort to the observer of the projected image.

In addition, you may change the said embodiment as follows.
(Modification 1)
The closing member 4 of the embodiment opens and closes the opening 211 through which the image light passes, but may open and close the opening such as the exhaust port 213. Further, a plurality of closing members may be provided, and the plurality of openings may be individually opened and closed, or a plurality of openings may be opened and closed by one closing member. Further, the closing member 4 may be configured to move in a direction other than the substantially horizontal direction, for example, in the vertical direction.

For example, a projector including one closing member that opens and closes the opening 211 and the exhaust port 213 will be described with reference to FIGS. 11 and 12.
FIG. 11 and FIG. 12 are perspective views showing the external appearance of the projector installed in the ceiling position, and showing the open state in which the closing member opens the opening 211 and the exhaust port 213. Specifically, FIG. 11 is a perspective view seen from the front upper side of the projector, and FIG. 12 is a perspective view seen from the rear upper side of the projector.
As shown in FIGS. 11 and 12, the projector 10 includes a closing member 40, an opening / closing mechanism unit (not shown), and an operation unit 60 having a string-like member. The closing member 40 includes the operation unit 60. By being pulled, it can be moved in the vertical direction (± Z direction) via the opening / closing mechanism.

The closing member 40 is formed in a box shape having an opening in the lower side (−Z direction) so that the upper surface, the front surface, the left and right side surfaces, and a part of the back surface of the exterior housing 2 can be covered. It is configured. An opening 140 is provided on the back surface so that the recess 214 is exposed even when the closing member 40 moves in the vertical direction.
The closing member 40 is moved in the vertical direction by the opening / closing mechanism when the operation unit 60 is pulled. Then, when the closing member 40 is lowered, the opening 211 and the exhaust port 213 are in an open state in which the closing member 40 is closed.
As described above, the closing member 40 can open and close the opening 211 and the exhaust port 213 via the opening / closing mechanism by operating the operation unit 60, and thus further suppresses intrusion of dust when the projector 10 is not used. It becomes possible to do.

(Modification 2)
One end of the string-like member 61 of the embodiment is locked to the closing member 4, but may be configured to be locked to the opening / closing mechanism 5.

(Modification 3)
The adjusting unit 64 of the embodiment is exposed from the exterior casing 2, but may be configured to be accommodated in the exterior casing 2.

(Modification 4)
The opening / closing mechanism unit 5 of the embodiment is configured so that the valve unit 526 locks the connecting portion 51 in the closed state, but may be configured to lock the connecting portion 51 in the open state.

(Modification 5)
The connecting portion 51 of the embodiment is configured to slide in the front-rear direction (± Y direction) with respect to the closing member 4, but the connecting portion 51 is made of a material having elasticity, such as an elastomer. You may comprise so that the guide part 52 may be moved, without sliding in the front-back direction.

(Modification 6)
Although the light modulation device of the embodiment uses the transmissive liquid crystal panel 332, it may be a device using a reflective liquid crystal panel or a device using a micromirror.

The perspective view which looked at the state in which the projector was installed in the ceiling hanging posture from the front upper side. The perspective view which looked at the state in which the projector was installed in the ceiling posture from the back upper side. FIG. 2 is a plan view schematically showing a schematic configuration of a projector. The perspective view which shows typically schematic structure of a closure member, an opening-and-closing mechanism part, and an operation part. The front view which shows the obstruction | occlusion member of an open state, an opening-and-closing mechanism part, and an operation part. ZZ sectional drawing in FIG. The top view which looked at the guide part and the connection part from the upper part. The enlarged view of a valve part. The perspective view which shows the state which opened the adjustment part. The front view which shows the obstruction | occlusion member and opening / closing mechanism part of an obstruction | occlusion state. The perspective view which looked at the state by which the projector of the modification was suspended from the ceiling from the front upper side. The perspective view which looked at the state by which the projector of the modification was suspended from the ceiling from the back upper side.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,10 ... Projector, 2 ... Exterior casing, 4, 40 ... Closure member, 5 ... Opening / closing mechanism part, 6, 60 ... Operation part, 34 ... Projection lens, 51 ... Connection part, 60 ... Operation part, 61 ... String 64, adjusting part, 140, 211 ... opening, 212 ... intake port, 213 ... exhaust port, 311 ... light source, 332 ... liquid crystal panel, 521 ... guide body, 526, 527A, 527B ... valve part.

Claims (5)

A light modulation device that modulates a light beam emitted from a light source according to image information to form image light, a projection optical device that projects the image light, the light modulation device and the projection optical device are housed, and A projector capable of projecting the image light in a ceiling-suspended posture suspended from a ceiling.
A closing member capable of closing the opening, and an opening / closing mechanism connected to the closing member and opening and closing the opening by guiding the closing member;
One end is connected to the closing member or the opening / closing mechanism, the other end has a string-like member exposed from the exterior housing, and the opening / closing state of the opening is switched by pulling the other end. An operation unit;
A projector comprising: The projector according to claim 1,
The projector according to claim 1, wherein the opening / closing mechanism opens and closes the opening through which the image light passes. The projector according to claim 1 or 2, wherein
The projector is characterized in that the opening / closing mechanism part opens and closes the opening part by guiding the closing member in a substantially horizontal direction in the ceiling suspension posture. The projector according to any one of claims 1 to 3,
The projector according to claim 1, wherein the operation unit includes an adjustment unit that adjusts a length of the string-like member. The projector according to any one of claims 1 to 4, wherein
The opening / closing mechanism is
A guide body that regulates the position of the closing member and guides the closing member movably between a first position that opens the opening and a second position that closes the opening;
A valve portion for holding the closing member in the first position or the second position;
A projector comprising:

Images