JP6052582B2 - Image projection device - Google Patents

Description

  The present invention relates to an image projection apparatus.

  Conventionally, based on image data from a personal computer or a video camera, an image is formed by an image forming unit using light emitted from a light source such as a halogen lamp, a metal halide lamp, or a high-pressure mercury lamp, and the image is displayed on a screen or the like. 2. Description of the Related Art Image projection apparatuses that project and display images are known.

  Japanese Patent Application Laid-Open No. H10-228561 describes an image projection apparatus provided with an opening for attaching and detaching a light source to and from a main body of a housing, and an opening / closing cover that covers the opening. In the image projection apparatus described in Patent Document 1, the opening / closing cover is screwed to the housing.

Further, a first state to fix the opening and closing cover to the apparatus main body, the rotation operating member mounted rotatably relative to the opening cover so that it can take selectively by the operation and a second state in which the fixing is released There is also known an image projection apparatus including the above.
FIG. 43 is a perspective view showing a base member 53 as a housing in which an opening of an image projection apparatus having a rotation operation member is formed, and an opening / closing cover 54 attached so as to cover the opening.

FIG. 44 is an enlarged configuration diagram around the notch 53d, and FIG. 44A is a schematic diagram illustrating a state where the rotation operation unit 54a is rotated and the fixing unit 161 is moved in the arrow A direction. , (b) are schematic views showing a state of fixing the opening and closing cover to the device body.
As shown in FIG. 44, the notch 53d is formed with a fitting convex portion 253, and the fixing portion 161 of the rotation operation portion is formed with a fitting concave portion 161a into which the fitting convex portion 253 is fitted. Yes.

As shown in FIG. 44 (a), in order to fix the opening and closing cover to the device body and gradually rotated in the direction of arrow A the pivot operation part, the right end in the drawing of the fixing portion 161, It strikes against the fitting convex part 253. When the rotation operation portion is further rotated from this state, the fixing portion 161 is elastically deformed and rides on the fitting convex portion, and the fitting concave portion 161a of the fixing portion 161 is fitted as shown in FIG. 44 (b). The convex part 253 is fitted. As described above, the fitting concave portion 161a fits into the fitting convex portion 253, so that the rotation operation portion 54a can be kept in the first state, and the rotation operation portion 54a is rotated by vibration or the like, so that the opening / closing cover 54 can be rotated. Is prevented from coming off from the apparatus main body.

  43 and 44, the opening / closing cover can be easily fixed and released from the casing as compared with the image projecting apparatus described in Patent Document 1 in which the opening / closing cover is screwed to the casing. And can be done.

  However, in the image projection apparatus shown in FIGS. 43 and 44, when the fixing portion 161 is ridden on the fitting convex portion 253, the rotational load increases. For this reason, some users may mistakenly assume that the rotation operation unit 54a is in the first state and stop the operation of the rotation operation unit 54a in the state shown in FIG. As a result, the fixing portion 161 is left in an elastically deformed state, and the fixing portion 161 does not return to its original shape due to creeping over time, and the opening / closing cover 54 is normally fixed to the apparatus main body. There is a risk that it will not be possible. Further, the rotation operation unit 54a may be rotated by vibration or the like, and the opening / closing cover 54 may be detached from the apparatus main body.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an image projection apparatus capable of reliably retaining the rotation operation unit in the first state and suppressing deformation and breakage of the operation member. Is to provide.

In order to achieve the above object, an invention according to claim 1 is directed to an image forming unit that forms an image using light from a light source provided in a light source unit configured to be detachable from the apparatus main body, and the image. an image projection apparatus having a projection optical unit which projects, and a closing cover for opening and closing an opening provided for attaching and detaching the light source unit to the apparatus main body, securing the opening and closing cover to the device body An operation member that is movably attached to the opening / closing cover so that the first state and the second state in which the fixation is released can be selectively taken by an operation, and either the apparatus main body or the operation member When the operating member is operated so as to change from the second state to the first state, the fitting concave portion provided on the other side and a fitting convex portion provided on the other side to be engaged with the fitting concave portion are operated. The fitting is on the surface having the recess. While the convex portion is pressed, the fitting convex portion relatively moves toward the fitting concave portion, and the fitting convex portion engages with the fitting concave portion, whereby the operation member is moved to the first state. And a fitting maintaining means for pushing the fitting convex portion back to the fitting concave portion when the fitting convex portion passes the fitting concave portion .

  According to the first aspect of the present invention, when the operation of the operation member is stopped before the fitting convex portion is fitted into the fitting concave portion, the operation member is operated from the second state to the first state. Since the operation member is pushed back in the direction opposite to the fixed operation direction when the member is operated, it is possible to notify the user that the fitting convex portion and the fitting concave portion are not fitted. Thereby, it can suppress that an apparatus will be used in the state which the fitting convex part and the fitting recessed part are not fitting. Therefore, a user's operation mistake can be suppressed and an operation member can be reliably stopped in a 1st state. As a result, it is possible to suppress a problem that the operating member moves in the direction opposite to the fixing operation direction due to vibration or the like, and the fixing of the opening / closing cover is released.

  Further, since the operation member is pushed back, the operation member is not left in an elastically deformed state. Thereby, it is possible to suppress creep deformation of the operation member.

The perspective view which shows the projector and projection surface which concern on this embodiment. An optical path diagram from the projector to the projection surface. FIG. 2 is a schematic perspective view showing an internal configuration of a projector. The schematic perspective view of a light source part. The perspective view which shows the optical system components accommodated in the illumination part with other parts. The perspective view which looked at the illumination part, the projection lens part, and the image formation part from the A direction of FIG. The figure explaining the optical path of the light in an illumination part. The perspective view of an image formation part. The perspective view which shows a 1st optical part with an illumination part and an image formation part. AA sectional drawing of FIG. The perspective view which shows the 2nd optical system which a 2nd optical part hold | maintains with a projection lens part, an illumination part, and an image formation part. The perspective view which shows a 2nd optical part with a 1st optical part, an illumination part, and an image formation part. The perspective view which shows the optical path from a 1st optical system to a projection surface. The schematic diagram which showed the arrangement | positioning relationship of each part in an apparatus. FIG. 4 is a diagram illustrating an example of use of the projector according to the present embodiment. The figure which shows the usage example of the conventional projector. The figure which shows the usage example of the conventional projector different from FIG. The figure which shows another example of use of the projector of this embodiment. The perspective view which looked at the installation surface side of the projector. The perspective view which shows a mode that the opening / closing cover 54 was removed from the apparatus. Explanatory drawing explaining the flow of the air in a projector. The perspective view which shows the cooling part which cools DMD etc. with both an illumination part and a light source part. FIG. 23 is a cross-sectional view of FIG. 22. The perspective view which shows a horizontal duct, a light source part, and a base member. The figure which looked at the flow of the air from a horizontal duct to a light source bracket from the lower side. The perspective view which looked at the flow of the air from a horizontal duct to a light source bracket from the upper side. The perspective view which shows an opening / closing cover. The perspective view which shows a rotation operation part. The perspective view which shows a rotation operation part and a biasing member. The expansion block diagram around the fixed part of a rotation operation part. The schematic block diagram which shows the light source part extraction opening periphery of a base member. The perspective view explaining a mode that a rotation operation part is attached to an opening-and-closing cover. The perspective view when an opening-and-closing cover is assembled | attached to the light source part extraction port of a base member. The perspective view when an opening / closing cover is fixed to the light source part taking-out port of a base member. The perspective view seen from the arrow d direction of FIG. The figure which shows a mode when the rotation operation part is rotated too much in the image projection apparatus which this applicant developed. The perspective view which shows a mode when the rotation operation part is rotated too much in the image projector of this embodiment. The perspective view which shows a mode when the fitting recessed part is fitting to the fitting convex part. The figure explaining pushing in of the light source part at the time of fixing an opening / closing cover to the light source part taking-out port of a base member. The perspective view which shows a mode when an opening-and-closing cover is fixed to the light source part extraction port with an illumination part, a light source part, and a base member. The perspective view seen from the arrow d direction of FIG. 40 when a rotation operation part exists in a fixed release position. The perspective view seen from the arrow d direction of FIG. 40 when a rotation operation part exists in a fixed position. The perspective view which shows the base member and opening / closing cover of the image projector which the present applicant developed. The expansion block diagram of the notch periphery of the image projector developed by the present applicant. The figure which shows a mode when rotation operation is stopped, without making a fitting recessed part fit in a fitting convex part in the same development product.

Hereinafter, an embodiment of a projector as an image projection apparatus to which the present invention is applied will be described. FIG. 1 is a perspective view showing a projector 1 and a projection surface 101 such as a screen according to the present embodiment. In the following description, the normal direction of the projection plane 101 is the X direction, the short axis direction (vertical direction) of the projection plane is the Y direction, and the long axis direction (horizontal direction) of the projection plane 101 is the Z direction.
As shown in FIG. 1, a transmissive glass 51 from which a projected image P is emitted is provided on the upper surface of the projector 1, and the projected image P emitted from the transmissive glass 51 is projected onto a projection surface 101 such as a screen. .
Further, on the upper surface of the projector 1, an operation unit 83 is provided for the user to operate the projector 1. A focus lever 33 for adjusting the focus is provided on the side surface of the projector 1.

FIG. 2 is an optical path diagram from the projector 1 to the projection plane 101.
The projector 1 includes a light source unit (not shown) provided with a light source, and an image forming system A that forms an image using light from the light source. The image forming system A includes an image forming unit 10 having a DMD 12 (Digital Mirror Device) as an image forming element, and an illumination unit 20 that folds light from a light source and irradiates the DMD 12 to generate a light image. Has been. Further, it has a projection optical system B for projecting an image onto the projection plane 101. The projection optical system B includes at least one transmissive refracting optical system, and includes a first optical unit 30 including a coaxial first optical system 70 having positive power, a folding mirror 41, and positive power. And a second optical unit 40 having a curved mirror 42 having the same.

  The DMD 12 emits light from a light source (not shown) by the illumination unit 20, and generates an image by modulating the light emitted by the illumination unit 20. The optical image generated by the DMD 12 is projected onto the projection surface 101 via the first optical system 70 of the first optical unit 30, the folding mirror 41 of the second optical unit 40, and the curved mirror 42.

FIG. 3 is a schematic perspective view showing the internal configuration of the projector 1.
As shown in FIG. 3, the image forming unit 10, the illumination unit 20, the first optical unit 30, and the second optical unit 40 are arranged side by side in the Y direction in the drawing in a direction parallel to the projection plane and the image plane of the projection image. Has been. A light source unit 60 is disposed on the right side of the illumination unit 20 in the drawing.

  3 are the leg portions of the lens holder 32 of the first optical unit 30, and the reference numeral 262 is a screwing unit for screwing the image forming unit 10 to the illumination unit 20. .

  Next, the structure of each part will be described in detail.

First, the light source unit 60 will be described.
FIG. 4 is a schematic perspective view of the light source unit 60.
The light source unit 60 has a light source bracket 62, and a light source 61 such as a halogen lamp, a metal halide lamp, or a high-pressure mercury lamp is mounted on the light source bracket. Further, the light source bracket 62 is provided with a connector portion 62a for connecting to a power supply side connector (not shown) connected to the power supply portion 80 (see FIG. 14).

  A holder 64 holding a reflector (not shown) is screwed to the light emitting side of the light source 61 above the light source bracket 62. An exit window 63 is provided on the surface of the holder 64 opposite to the light source 61 arrangement side. The light emitted from the light source 61 is collected on the emission window by a reflector (not shown) held by the holder and is emitted from the emission window 63.

  Further, light source positioning portions 64a1 to 64a3 are provided on the upper surface of the holder 64 and both ends in the X direction of the lower surface of the holder in order to position the light source unit 60 on the illumination bracket 26 (see FIG. 6) of the illumination unit 20. The light source positioning portion 64a3 provided on the upper surface of the holder 64 has a protruding shape, and the two light source positioning portions 64a1 and 64a2 provided on the lower surface of the holder 64 have a hole shape.

  Further, a light source air supply port 64 b into which air for cooling the light source 61 flows is provided on the side surface of the holder 64, and air heated by the heat of the light source 61 is exhausted on the upper surface of the holder 64. A light source exhaust port 64c is provided.

  As will be described later, the light source bracket 62 is provided with a passage portion 65 into which air sucked from the intake blower 91 (see FIG. 21 and the like) flows. Further, in order to allow a part of the air flowing into the passage portion 65 to flow between the light source portion 60 and an opening / closing cover 54 (see FIG. 7), which will be described later, on the air inflow side on the near side of the passage portion 65 in the drawing. The opening 65a is provided. The cooling of the light source unit 60 will be described later.

  Also, the flat portion 64d2 provided with the light source positioning protrusion 64a3 and the flat portion 64d1 provided with the light source positioning holes 64a1 and 64a2 shown in FIG. 4 are pressed by the pressing means of the opening / closing cover as will be described later. The abutting portion that abuts against the lighting bracket.

Next, the illumination unit 20 will be described.
FIG. 5 is a perspective view showing the optical system parts housed in the illumination unit 20 together with other parts.
As shown in FIG. 5, the illumination unit 20 includes a color wheel 21, a light tunnel 22, two relay lenses 23, a cylinder mirror 24, and a concave mirror 25, which are held by an illumination bracket 26. Yes. The illumination bracket 26 has a housing-like portion 261 in which the two relay lenses 23, the cylinder mirror 24, and the concave mirror 25 are accommodated. Of the four side portions of the housing-like portion 261, Only the right side in the figure has a side surface, and the other three surfaces are open. An OFF light plate 27 (see FIG. 6) is attached to the side opening on the back side in the X direction in the figure, and the side opening on the near side in the X direction in the figure is shown in any drawing. An uncovered cover member is attached. As a result, the two relay lenses 23, the cylinder mirror 24, and the concave mirror 25 housed in the housing-like portion 261 of the illumination bracket 26 are either the illumination bracket 26 or the OFF light plate 27 (see FIG. 6). It is covered with a cover member not shown in the drawing.

  Further, an irradiation through-hole 26d for exposing the DMD 12 is provided on the lower surface of the housing-like portion 261 of the illumination bracket 26.

  The lighting bracket 26 has three leg portions 29. These leg portions 29 are in contact with the base member 53 (see FIG. 19) of the projector 1 and support the weight of the first optical unit 30 and the second optical unit 40 that are stacked and fixed on the illumination bracket 26. Further, by providing the leg portions 29, a space for the outside air to flow in is formed in the heat sink 13 (see FIG. 6) as a cooling means for cooling the DMD 12 of the image forming portion 10, as will be described later.

  Note that reference numerals 32a3 and 32a4 shown in FIG. 5 are legs of the lens holder 32 of the first optical unit 30, and reference numeral 45a3 is a screwing part 45a3 of the second optical unit 40.

FIG. 6 is a perspective view of the illumination unit 20, the projection lens unit 31, and the image forming unit 10 as viewed from the direction A in FIG.
An upper surface 26b orthogonal to the Y direction in the figure is provided on the upper portion of the housing-like portion 261 of the illumination bracket 26. In the four corners of the upper surface 26b, through holes through which screws for screwing the first optical unit 30 pass are provided (in FIG. 6, the through holes 26c1 and 26c2 are shown, and the remaining holes are illustrated. The through hole is not shown). Further, positioning holes 26e1 and 26e2 for positioning the first optical unit 30 on the illumination unit 20 are provided adjacent to the through holes 26c1 and 26c2 on the near side in the X direction in the drawing. Of the two positioning holes provided on the near side in the X direction in the figure, the positioning hole 26e1 on the color wheel 21 arrangement side is a main reference for positioning and has a round hole shape. The positioning hole 26e2 on the opposite side is a positioning secondary reference and is a long hole extending in the Z direction. Further, the periphery of each through hole 26c1, 26c2 protrudes from the upper surface 26b of the illumination bracket 26, and serves as a positioning projection 26f for positioning the first optical unit 30 in the Y direction. When the positional accuracy in the Y direction is increased without providing the positioning protrusions 26f, it is necessary to increase the flatness of the entire upper surface of the illumination bracket 26, which increases the cost. On the other hand, by providing the positioning projection 26f, it is only necessary to increase the flatness of only the portion of the positioning projection 26f. Therefore, the cost can be reduced and the positional accuracy in the Y direction can be increased.

  In addition, a light shielding plate 262 into which the lower portion of the projection lens unit 31 is fitted is provided in the opening on the upper surface of the illumination bracket 26 to prevent light from entering the housing-like portion 261 from above.

  Further, between the through holes 26c1 and 26c2 on the upper surface 26b of the illumination bracket 26, as will be described later, the second optical unit 40 is cut out so as not to be an obstacle when screwed to the first optical unit 30. .

  A protruding light source positioning portion 64a3 (see FIG. 4) provided on the upper surface of the holder 64 of the light source portion 60 is fitted to the end portion of the illumination bracket 26 on the color wheel 21 side (the front side in the Z direction in the drawing). A cylindrical light source positioned portion 26a3 having a through hole formed in the vertical direction is provided. Further, below the light source positioned portion 26a3, two protruding light source positioned portions 26a1 into which two hole-shaped light source positioning portions 64a1 and 64a2 provided on the light source bracket 62 side of the holder 64 are fitted. 26a2 are provided. Then, the three light source positioning portions 64a1 to 64a3 of the holder 64 are fitted into the three light source positioned portions 26a1 to 26a3 provided on the illumination bracket 26 of the illumination unit 20, so that the light source unit 60 is provided with the illumination unit. Positioned and fixed to 20 (see FIG. 3).

  An illumination cover 28 is attached to the illumination bracket 26 so as to cover the color wheel 21 and the light tunnel 22.

FIG. 7 is a diagram illustrating an optical path L of light in the illumination unit 20.
The color wheel 21 has a disk shape and is fixed to the motor shaft of the color motor 21a. The color wheel 21 is provided with filters such as R (red), G (green), and B (blue) in the rotation direction. Light collected by a reflector (not shown) provided in the holder 64 of the light source unit 60 passes through the emission window 63 and reaches the peripheral end of the color wheel 21. The light reaching the peripheral end of the color wheel 21 is separated into R, G, and B light in a time-sharing manner by the rotation of the color wheel 21.

  The light separated by the color wheel 21 enters the light tunnel 22. The light tunnel 22 has a rectangular tube shape, and the inner peripheral surface thereof is a mirror surface. The light that has entered the light tunnel 22 is reflected by the inner peripheral surface of the light tunnel 22 a plurality of times, is converted into a uniform surface light source, and is emitted toward the relay lens 23.

  The light passing through the light tunnel 22 passes through the two relay lenses 23, is reflected by the cylinder mirror 24 and the concave mirror 25, and is focused on the image generation surface of the DMD 12 to form an image.

Next, the image forming unit 10 will be described.
FIG. 8 is a perspective view of the image forming unit 10.
As shown in FIG. 8, the image forming unit 10 includes a DMD board 11 on which a DMD 12 is mounted. The DMD 12 is mounted on a socket 11 a provided on the DMD board 11 with an image generation surface on which micromirrors are arranged in a lattice shape facing upward. The DMD board 11 is provided with a drive circuit for driving the DMD mirror. A heat sink 13 as a cooling means for cooling the DMD 12 is fixed to the back surface of the DMD board 11 (the surface opposite to the surface on which the socket 11a is provided). A portion of the DMD board 11 where the DMD 12 is mounted penetrates, and the heat sink 13 is formed with a protrusion 13a (see FIG. 7) to be inserted into a through hole (not shown). The tip of the protrusion 13a is planar. The protrusion 13a is inserted into a through hole (not shown), and the flat surface at the tip of the protrusion 13a is brought into contact with the back surface (the surface opposite to the image generation surface) of the DMD 12. A heat transfer sheet that can be elastically deformed is affixed to the flat portion or the place where the heat sink 13 on the back surface of the DMD 12 abuts to improve the adhesion between the flat portion of the protrusion 13a and the back surface of the DMD 12, thereby increasing the thermal conductivity. May be.

  The heat sink 13 is pressed and fixed to the surface opposite to the surface on which the socket 11a of the DMD board 11 is provided by the fixing member 14. The fixing member 14 has a plate-like fixing portion 14a facing the right side portion of the rear surface of the DMD board 11 in the drawing and a plate-like fixing portion 14a facing the left portion of the rear surface of the DMD board 11 in the drawing. doing. Near each of the fixed portions in the X direction and near the other end, there is a pressing portion 14b provided to connect the left and right fixed portions.

  When the image forming unit 10 is screwed to the illumination bracket 26 (see FIG. 6), the heat sink 13 is pressed and fixed by the fixing member 14 to the surface opposite to the surface on which the socket 11a of the DMD board 11 is provided. The

  Hereinafter, fixing of the illumination bracket 26 of the image forming unit 10 will be described. First, the DMD 12 positions the image forming unit 10 on the illumination bracket 26 so as to face the opening surface of the irradiation through hole 26d provided on the lower surface of the illumination bracket 26 of the illumination unit 20 shown in FIG. Next, a screw is inserted from the lower side in the drawing so as to pass through a through hole (not shown) provided in the fixing portion 14 a and the through hole 15 of the DMD board 11, and the screw is provided in the lighting bracket 26. The image forming unit 10 is fixed to the illumination bracket 26 by screwing into a screw hole provided on the lower surface of the stopper 262 (see FIG. 3). Further, when a screw is screwed into the screwing portion 262 provided on the lighting bracket 26, the pressing portion 14b pushes the heat sink 13 toward the DMD board. Thereby, the heat sink 13 is pressed and fixed by the fixing member 14 to the surface opposite to the surface on which the socket 11a of the DMD board 11 is provided.

  As described above, the image forming unit 10 is fixed to the illumination bracket 26, and the three legs 29 shown in FIG. 5 also support the weight of the image forming unit 10.

  A plurality of movable micromirrors are arranged in a lattice pattern on the image generation surface of the DMD 12. Each micromirror can tilt the mirror surface by a predetermined angle around the twist axis, and can have two states of “ON” and “OFF”. When the micromirror is “ON”, the light from the light source 61 is reflected toward the first optical system 70 (see FIG. 2) as indicated by the arrow L2 in FIG. When it is “OFF”, the light from the light source 61 is reflected toward the OFF light plate 27 held on the side surface of the illumination bracket 26 shown in FIG. 6 (see arrow L1 in FIG. 7). Therefore, by driving each mirror individually, light projection can be controlled for each pixel of the image data, and an image can be generated.

  The light reflected toward the OFF light plate 27 (not shown) is absorbed as heat and cooled by the flow of outside air.

Next, the first optical unit 30 will be described.
FIG. 9 is a perspective view showing the first optical unit 30 together with the illumination unit 20 and the image forming unit 10.
As shown in FIG. 9, the first optical unit 30 is disposed above the illumination unit 20, and includes a projection lens unit 31 that holds a first optical system 70 (see FIG. 2) that includes a plurality of lenses. And a lens holder 32 for holding the projection lens unit 31. The lens holder 32 is provided with four leg portions 32a1 to 32a4 extending downward (only the leg portions 32a2 and 32a3 are shown in FIG. 9. The leg portion 32a1 is shown in FIG. 3 and the leg portion 32a4. 5), screw holes for being screwed to the illumination bracket 26 are formed on the bottom surfaces of the leg portions 32a1 to 32a4.

  The projection lens unit 31 is provided with a focus gear 36, and the idler gear 35 is engaged with the focus gear 36. A lever gear 34 meshes with the idler gear 35, and a focus lever 33 is fixed to the rotation shaft of the lever gear 34. The tip portion of the focus lever 33 is exposed from the apparatus main body as shown in FIG.

  When the focus lever 33 is moved, the focus gear 36 is rotated via the lever gear 34 and the idler gear 35. When the focus gear 36 rotates, a plurality of lenses constituting the first optical system 70 in the projection lens unit 31 move in predetermined directions, and the focus of the projection image is adjusted.

  Further, the lens holder 32 has screw through holes 32c1 to 32c3 through which screws 48 for screwing the second optical unit 40 to the first optical unit 30 pass (4 in FIG. 9). The screw through-holes are illustrated, and the screw through-holes 32c1 to 32c3 each show a state in which the screw 48 is penetrated, and what is visible in the figure is the tip side of the screw portion of the screw 48 .) Further, second optical part positioning protrusions 32d1 to 32d3 protruding from the surface of the lens holder 32 are formed around the screw through holes 32c1 to 32c4 (32d1 to 32d3 are shown in FIG. 9).

FIG. 10 is a cross-sectional view taken along the line AA of FIG.
As shown in FIG. 10, the leg portions 32a1 and 32a2 are provided with positioning protrusions 32b1 and 32b2. The right-side positioning protrusion 32b1 in the drawing is a round hole-shaped positioning hole 26e1 that is the main reference for positioning provided on the upper surface 26b of the illumination bracket 26, and the left-side positioning protrusion 32b2 in FIG. Positioning in the Z-axis direction and the X-axis direction is performed by inserting the reference holes into the long hole-shaped positioning holes 26e2, respectively. Then, screws 37 are inserted into the through holes 26c1 to 26c4 provided on the upper surface 26b of the lighting bracket 26, and the screws 37 are screwed into the screw holes provided in the respective leg portions 32a1 to 32a4 of the lens holder 32. One optical unit 30 is positioned and fixed to the illumination unit 20.

  The upper side of the projection lens unit 31 with respect to the lens holder 32 is covered with a mirror holder 45 (see FIG. 12) of the second optical unit described later. As shown in FIG. 3, the portion between the lens holder 32 below the lens holder 32 of the projection lens unit 31 and the upper surface 26b of the illumination bracket 26 of the illumination unit 20 is exposed. Since the projection lens unit 31 is fitted with the lens holder 32, light does not enter the optical path of the image from the exposed portion.

Next, the second optical unit 40 will be described.
FIG. 11 is a perspective view showing the second optical system included in the second optical unit 40 together with the projection lens unit 31, the illumination unit 20, and the image forming unit 10.
As shown in FIG. 11, the second optical unit 40 includes a folding mirror 41 and a concave curved mirror 42 that constitute the second optical system. The surface of the curved mirror 42 that reflects the light can be a spherical surface, a rotationally symmetric aspherical surface, a free curved surface shape, or the like.

FIG. 12 is a perspective view showing the second optical unit 40 together with the first optical unit 30, the illumination unit 20, and the image forming unit 10.
As shown in FIG. 12, the second optical unit 40 also includes a transmission glass 51 for transmitting the light image reflected from the curved mirror 42 and protecting the optical system components in the apparatus.

  The second optical unit 40 includes a mirror bracket 43 that holds the folding mirror 41 and the transmission glass 51, a free mirror bracket 44 that holds the curved mirror 42, and a mirror holder 45 to which the mirror bracket 43 and the free mirror bracket 44 are attached. have.

  The mirror holder 45 has a box shape, and has an upper surface, a lower surface, and a back side in the X direction in the drawing, and has a substantially U-shape when viewed from above. Edges extending in the X direction on the Z direction front side and the back side of the upper opening of the mirror holder 45 are inclined so as to rise from the X direction front side end portion to the X direction back side in the drawing. Part and a parallel part parallel to the X direction in the figure, and the inclined part is on the near side in the X direction in the figure from the parallel part. Further, the edge of the upper opening of the mirror holder 45 extending in the Z direction on the near side in the X direction in the drawing is parallel to the Z direction in the drawing.

  The mirror bracket 43 is attached to the upper part of the mirror holder 45. The mirror bracket 43 includes an inclined surface 43a that is inclined so as to rise from the front end in the X direction in the drawing, which contacts the inclined portion of the upper opening edge of the mirror holder 45, and the mirror holder 45. And a parallel surface 43b parallel to the X direction that contacts the parallel portion of the edge of the upper opening. Each of the inclined surface 43a and the parallel surface 43b has an opening, the folding mirror 41 is held so as to close the opening of the inclined surface 43a, and is transmitted so as to close the opening of the parallel surface 43b. A glass 51 is held.

  The folding mirror 41 is positioned and held on the inclined surface 43 a of the mirror bracket 43 by pressing both ends in the Z direction against the inclined surface 43 a of the mirror bracket 43 by a plate pressing member 46 having a leaf spring shape. The one end of the folding mirror 41 in the Z direction is fixed by two mirror pressing members 46, and the other end is fixed by one mirror pressing member 46.

  The transmissive glass 51 is positioned and fixed to the mirror bracket 43 by pressing both ends in the Z direction against the parallel surface 43b of the mirror bracket 43 by the plate spring-like glass pressing members 47. The transmissive glass 51 is held by one glass pressing member 47 at each of both ends in the Z direction.

  The free mirror bracket 44 that holds the curved mirror 42 has arm portions 44a that are inclined so as to descend from the back side in the X direction toward the front side in the figure, on the front side and the back side in the Z-axis direction. The free mirror bracket 44 has a connecting portion 44b that connects the two arm portions 44a at the upper portion of the arm portion 44a. The free mirror bracket 44 has an arm portion 44 a attached to the mirror holder 45 so that the curved mirror 42 covers the opening on the back side in the X direction of the mirror holder 45 in the figure.

  In the curved mirror 42, the substantially central portion of the end portion on the transmission glass 51 side is pressed against the connecting portion 44b of the free mirror bracket 44 by a leaf spring-like free mirror pressing member 49, and the Z axis direction in the drawing on the first optical system side Both ends are fixed to the arm portion 44a of the free mirror bracket 44 by screws.

  The second optical unit 40 is stacked and fixed on the lens holder 32 of the first optical unit 30. Specifically, a lower surface 451 facing the upper surface of the lens holder 32 is provided at the lower portion of the mirror holder 45, and the lower surface 451 has a cylindrical shape for screwing to the first optical unit 30. Four screwing portions 45a1 to 45a3 are formed (see FIG. 11 for the screwing portions 45a1 and 45a2, see FIG. 5 for the screwing portions 45a3, and the remaining screwing portions are not shown). The second optical unit 40 passes the screws 48 through the screw through holes 32c1 to 32c3 provided in the lens holder 32 of the first optical unit 30, and screws the screws 48 into the screw fixing portions 45a1 to 45a3. The first optical unit 30 is screwed. At this time, the lower surface of the mirror holder 45 of the second optical unit 40 comes into contact with the second optical unit positioning protrusions 32d1 to 32d4 of the lens holder 32, and the second optical unit 40 is positioned and fixed in the Y direction. .

  When the second optical unit 40 is stacked and fixed on the lens holder 32 of the first optical unit 30, the upper part of the projection lens unit 31 than the lens holder 32 of the projection lens unit 31 is located on the second optical unit 40 as shown in FIG. 9. It is stored in the mirror holder 45. Further, when the second optical unit 40 is mounted and fixed on the lens holder 32, there is a gap between the curved mirror 42 and the lens holder 32, and the idler gear 35 (see FIG. 9) enters the gap. It becomes a shape.

FIG. 13 is a perspective view showing an optical path from the first optical system 70 to the projection surface 101 (screen).
The light beam transmitted through the projection lens unit 31 constituting the first optical system 70 forms an intermediate image conjugate with the image generated by the DMD 12 between the folding mirror 41 and the curved mirror 42. This intermediate image is formed as a curved surface image between the folding mirror 41 and the curved mirror 42. Next, the divergent light beam after forming the intermediate image is incident on the concave curved mirror 42 and becomes a convergent light beam. The curved mirror 42 converts the intermediate image into a “further enlarged image” on the projection surface 101. Projection imaging.

  As described above, the projection optical system is configured by the first optical system 70 and the second optical system, and an intermediate image is formed between the first optical system 70 and the curved mirror 42 of the second optical system. By performing the enlarged projection with the mirror 42, the projection distance can be shortened, and it can be used even in a narrow conference room.

  As shown in FIG. 13, the first optical unit 30 and the second optical unit 40 are stacked and fixed on the illumination bracket 26. The image forming unit 10 is also fixed. Therefore, the leg portion 29 of the illumination bracket 26 is fixed to the base member 53 so as to support the weight of the first optical unit 30, the second optical unit 40 and the image forming unit 10.

FIG. 14 is a schematic diagram showing an arrangement relationship of each part in the apparatus.
As shown in the figure, the image forming unit 10, the illumination unit 20, the first optical unit 30, and the second optical unit 40 are stacked in the Y direction, which is the minor axis direction of the projection surface, and the light source unit 60 is The image forming unit 10, the illumination unit 20, the first optical unit 30, and the second optical unit 40 are arranged in the Z direction, which is the major axis direction of the projection plane, with respect to the stacked body. Thus, in the present embodiment, the image forming unit 10, the illumination unit 20, the first optical unit 30, the second optical unit 40, and the light source unit are in a direction parallel to the projection image and the projection plane 101. Arranged side by side in the direction or Z direction. More specifically, with respect to the direction in which the image forming system A including the image forming unit 10 and the illumination unit 20 and the projection optical system B including the first optical unit 30 and the second optical unit 40 are stacked. The light source unit 60 is connected to the image forming system A in the orthogonal direction. In addition, the image forming system A and the light source unit 60 are arranged on the same straight line parallel to the base member 53. The image forming system A and the projection optical system B are arranged on the same straight line perpendicular to the base member 53, and are arranged in the order of the image forming system A and the projection optical system B from the base member 53 side. . Thereby, it can suppress that the installation space of an apparatus is taken in the direction orthogonal to the surface of the projection image projected on the projection surface 101. FIG. Accordingly, when the image projection apparatus is used on a desk or the like, the apparatus can be prevented from interfering with the arrangement of the desk or chair even in a small room.

  In the present embodiment, a power supply unit 80 for supplying power to the light source 61 and the DMD 11 is disposed above the light source unit 60 in a stacked manner. The light source unit 60, the power source unit 80, the image forming system A, and the projection optical system B include the upper surface of the projector described above, the base member 53, and an exterior cover 59 (see FIG. 19) that covers the periphery of the projector 1. It is stored in the container of the projector 1.

FIG. 15 is a diagram illustrating a usage example of the projector 1 according to the present embodiment, FIG. 16 is a diagram illustrating a usage example of the conventional projector 1A, and FIG. 17 illustrates the projection name 101 of the light source 60 and the illumination unit 20. It is a figure which shows the usage example of the project 1B arranged side by side in the direction orthogonal to.
As shown in FIGS. 15 to 17, when the projector 1 is used in, for example, a conference room, the projector 1 is used by projecting an image onto a projection surface 101 such as a whiteboard by placing the projector 1 on a table 100.

  As shown in FIG. 16, in the conventional projector 1A, the DMD 12 (image generating element), the illumination unit 20, the first optical system 70, and the second optical system (curved mirror 42) are orthogonal to the plane of the projected image. They are arranged in series in the direction. Therefore, it becomes longer in the direction orthogonal to the projection plane of the projector 1A (X direction), and the projector 1A takes up a space in the direction orthogonal to the projection plane 101. A chair on which a person who sees an image projected on the projection plane 101 sits and a desk to be used are generally arranged in a direction orthogonal to the projection plane, so that the projector has a space in a direction orthogonal to the projection plane. If you take it, the space for chairs and the space for desks are limited, which is inconvenient.

  In the projector 1B shown in FIG. 17, the DMD 12 (image forming element), the illumination unit 20, and the first optical system 70 are arranged in series in parallel with the plane of the projected image. Therefore, the length in the direction orthogonal to the projection plane 101 can be shortened compared to the projector 1B shown in FIG. However, in the projector 1B shown in FIG. 17, since the light source 61 is arranged in a direction orthogonal to the plane of the projection image with respect to the illumination unit 20, the length in the direction orthogonal to the projection plane 101 of the projector is long. It cannot be shortened sufficiently.

  On the other hand, in the projector 1 of the present embodiment shown in FIG. 15, the image forming system A composed of the image forming unit 10 and the illumination unit 20 and the projection optical system B composed of the first optical unit 30 and the folding mirror 41 are provided. The projection plane 101 and the image plane of the projection image projected onto the projection plane 101 are arranged in series in the Y direction in the drawing. Further, the light source unit 60 and the illumination unit 20 are arranged in series in the Z direction in the drawing in a direction parallel to the plane of the projection image projected onto the projection plane 101. That is, in the projector 1 of the present embodiment, the light source unit 60, the image forming unit 10, the illumination unit 20, the first optical unit 30, and the folding mirror 41 are on the plane of the projection image projected on the projection plane 101. The light source unit 60, the image forming unit 10, the illuminating unit 20, the first optical unit 30, and the folding mirror 41 are each projected onto a projection surface. And it is arranged in parallel to the image plane of the projected image. Thus, the light source unit 60, the image forming unit 10, the illumination unit 20, the first optical unit 30, and the folding mirror 41 are parallel to the plane of the projection image projected on the projection plane 101 (in the drawing). (Z direction or Y direction), as shown in FIG. 15, the length in the direction orthogonal to the projection plane 101 (X direction in the figure) is shorter than that of the projector shown in FIG. 16 or FIG. can do. Thereby, it can suppress that the projector 1 becomes the obstruction of the arrangement space of a chair and the arrangement space of a desk, and the highly convenient projector 1 can be provided.

  In the present embodiment, as shown in FIG. 14, a power supply unit 80 for supplying power to the light source 61 and the DMD 11 is stacked above the light source unit 60. Thereby, the Z direction of the projector 1 is also shortened.

FIG. 18 is a diagram for explaining another example of use of the projector 1 according to the present embodiment.
As shown in FIG. 18, the projector 1 according to the present embodiment can be used by being suspended from the ceiling 105. Also in this case, since the projector 1 of the present embodiment is short in the direction orthogonal to the projection plane 101, when the projector 1 is installed on the ceiling 105, the projector 1 does not interfere with the lighting fixture 106 arranged on the ceiling 105. Can be installed.

  In the present embodiment, the second optical system is configured by the folding mirror 41 and the curved mirror 42. However, the second optical system may be configured by only the curved mirror 42. The folding mirror 41 may be a plane mirror, a mirror having a positive refractive power, or a mirror having a negative refractive power. In this embodiment, a concave mirror is used as the curved mirror 42, but a convex mirror can also be used. In this case, the first optical system 70 is configured not to form an intermediate image between the first optical system 70 and the curved mirror 42.

  Since the light source 61 reaches the end of its life when used over time, it needs to be periodically replaced. For this reason, in this embodiment, the light source part 60 is provided so that attachment or detachment is possible from an apparatus main body.

FIG. 19 is a perspective view of the projector 1 as viewed from the installation surface side.
As shown in FIG. 19, the base member 53 constituting the bottom surface of the projector 1 is provided with an opening / closing cover 54, and the opening / closing cover 54 is provided with a rotation operation portion 54 a. When the rotation operation unit 54a is rotated, the fixing of the opening / closing cover 54 and the apparatus main body is released, and the opening / closing cover 54 can be detached from the apparatus main body. A power inlet 56 is provided at a location adjacent to the X direction of the opening / closing cover 54 of the base member 53.

  Further, as shown in FIG. 19, on one YX plane of the exterior cover 59 of the projector 1, an air inlet 84 and an external input unit 88 for inputting image data and the like from an external device such as a personal computer are provided. ing.

FIG. 20 is a perspective view showing a state in which the opening / closing cover 54 is removed from the apparatus.
When the opening / closing cover 54 is removed, as shown in FIG. 20, the surface of the light source bracket 60 opposite to the side where the light source 61 is mounted is exposed. A handle portion 66 is attached to the light source bracket 62 so as to be rotatable with respect to the light source bracket 62 with O1 indicated by a dotted line in the figure as a rotation center.

  When the light source unit 60 is taken out from the apparatus main body, the light source unit 60 is removed from the opening of the apparatus main body by rotating the handle unit 66 to grasp the handle unit 66 and pulling it out to the front side in the figure. When the light source unit 60 is attached to the apparatus main body, the light source unit 60 is inserted from the opening of the apparatus main body. When the light source section 60 is inserted into the apparatus main body, the connector section 62a shown in FIG. 4 is connected to a power supply side connector (not shown) of the apparatus main body. Further, the three light source positioning portions 64a1 to 64a3 of the holder 64 shown in the figure are fitted to the three light source positioned portions 26a1 to 26a3 provided on the illumination bracket 26 of the illumination unit 20 shown in FIG. Then, the light source unit 60 is positioned on the apparatus main body. Thereby, the mounting of the light source unit 60 is completed. Then, the opening / closing cover 54 is attached to the base member 53. In the present embodiment, the light source unit 60 is provided with the part 66. However, as shown in FIG. 20, a passing part 65 provided to protrude toward the opening / closing cover 54 may be used as the handle part. The details of the opening / closing cover 54 will be described later.

  Further, the base member 53 is provided with three leg portions 55. By rotating the leg portion 55, the amount of protrusion from the base member 53 is changed, and the height direction (Y direction) is adjusted. Can be done.

  As shown in FIG. 20, an exhaust port 85 is provided on the other YX plane of the exterior cover 59.

FIG. 21 is an explanatory diagram illustrating the flow of air in the projector 1 of the present embodiment. This figure is a diagram of the projector 1 viewed from a direction (X direction) orthogonal to the projection plane 101.
As shown in FIG. 21, one of the side surfaces of the projector 1 (left side in the drawing) is provided with an intake port 84 that is open for taking outside air into the projector 1, and the other side surface of the projector 1 (right side in the drawing). Is provided with an open exhaust port 85 for exhausting air in the projector 1. An exhaust fan 86 is provided so as to face the exhaust port 85.

  Part of the exhaust port 85 and the intake port 84 is provided so as to be between the light source unit 60 and the operation unit 83 when the projector 1 is viewed from a direction (X direction) orthogonal to the projection plane 101. Yes. As a result, the outside air taken in from the intake port 84 wraps around the ZY plane of the mirror holder 45 of the second optical unit 40 and the back surface of the curved mirror 42 shown in FIG. It moves toward the intake port 84 along the back surface. The power supply unit 80 disposed at the upper part of the light source unit 60 has an arch shape when viewed from the Z direction in the figure, and is directed toward the air inlet 84 along the back surface of the mirror holder 45 and the curved mirror 42. The air thus moved flows into the space surrounded by the power supply unit 80 and is discharged from the exhaust port 85.

  In this way, a part of the exhaust port 85 and the intake port 84 is located between the light source unit 60 and the operation unit 83 when the projector 1 is viewed from a direction (X direction) orthogonal to the projection plane 101. By providing in, the air flow which passes between the light source part 60 and the operation part 83, and is discharged | emitted from the exhaust port 85 can be produced.

  Further, a light source blower 95 is arranged at a location where air around a color motor 21a (see FIG. 5) for rotating the color wheel 21 of the illumination unit 20 can be sucked. Thereby, the color motor 21a can be cooled by the airflow generated by the intake of the light source blower 95.

  The air sucked by the light source blower 95 passes through the light source duct 96 and flows into the light source air inlet 64b (see FIG. 4) of the holder 64. Further, part of the air flowing into the light source duct 96 flows between the light source housing 97 and the exterior cover 59 through an opening 96 a formed on the surface of the light source duct 96 facing the exterior cover 59 (see FIG. 19). .

  The air flowing between the light source housing 97 and the exterior cover 59 from the opening 96 a of the light source duct 96 is discharged from the exhaust port 85 by the exhaust fan 86 after cooling the light source housing 97 and the exterior cover 59.

  The air that has flowed to the light source supply port 64 b flows into the light source 61, cools the light source 61, and is then exhausted from the light source exhaust port 64 c provided on the upper surface of the holder 64. The air exhausted from the light source exhaust port 64 c is exhausted from the opening on the upper surface of the light source housing 97 to the space surrounded by the power supply unit 80. After that, after mixing with the low-temperature air that has entered the space surrounded by the power supply unit 80 around the second optical unit 40, the air is exhausted from the exhaust port 85 by the exhaust fan 86. As described above, the high-temperature air exhausted from the light source exhaust port 64c is mixed with the outside air and then exhausted, whereby the air exhausted from the exhaust port 85 can be prevented from becoming high temperature.

  Moreover, it is preferable that the operation unit 83 operated by the user is provided on the upper surface of the apparatus so that the user can easily operate. However, in this embodiment, since the transmissive glass 51 for projecting an image on the projection surface 101 is provided on the upper surface of the projector 1, the operation unit is located at a position overlapping the light source 61 when the projector is viewed from the Y direction. 83 must be provided.

  In the present embodiment, air heated between the light source unit 60 and the operation unit 83 from the intake port 84 toward the exhaust port 85 is used to exhaust high-temperature air that has cooled the light source 61 toward the exhaust port. Therefore, it is possible to suppress the movement of the high-temperature air to the operation unit 83. Thereby, it is possible to suppress the temperature of the operation unit 83 from rising due to the air heated to a high temperature by cooling the light source 61. Further, a part of the air that flows around the second optical unit 40 from the intake port 84 and flows toward the exhaust port 85 passes right under the operation unit 83 to cool the operation unit 83. This can also suppress the temperature rise of the operation unit 83.

  Further, outside air is taken in from the power supply inlet 56 provided in the base member 53 shown in FIG. A ballast substrate (not shown) for supplying stable power (current) to the light source 61 is arranged behind the light source housing 97 in the X direction in the drawing, and the outside air sucked from the power supply inlet 56 is The ballast substrate is cooled while moving upward between the light source housing 97 and a ballast substrate (not shown). Then, after flowing into a space surrounded by the power supply unit 80 disposed above the ballast substrate, the exhaust fan 86 exhausts the air from the exhaust port 85.

  In the present embodiment, the fan that generates the airflow from the intake port 84 to the exhaust port 85 is provided on the exhaust side as the exhaust fan 86. Therefore, compared with the case where a fan is provided at the intake port, the fan is connected to the inside of the apparatus. The supply amount of air supplied to can be increased. This is because when the fan is provided at the intake port 84, the second optical unit 40 is provided in the direction in which the fan air is sent out. Therefore, the amount of outside air supplied from the fan to the inside of the apparatus is reduced by the second optical unit 40. Resulting in. On the other hand, when a fan is provided on the exhaust port 85 side as the exhaust fan 86, normally there is no object on the exhaust side of the exhaust port 85, so the amount of air discharged from the exhaust fan 86 does not decrease. Therefore, since the same amount of air as the amount of exhaust exhausted from the exhaust fan 86 is taken in from the intake port 84, the supply amount of air supplied from the intake port to the inside of the apparatus may decrease as a result. Absent. Therefore, air can flow from the intake port 84 toward the exhaust port 85 with a predetermined wind pressure, and the heated air rising from the light source 61 is sent to the exhaust port 85 by an air flow from the intake port 84 to the exhaust port 85. Can go well.

A cooling unit 120 that cools the heat sink 13 of the image forming unit 10, the light source unit 60, the light source bracket 62, and the like is disposed on the lower left side of the apparatus main body. The cooling unit 120 includes an intake blower 91, a vertical duct 92, and a horizontal duct 93.
The flow of air sent out from the intake blower 91 will also be described with reference to FIG. The intake blower 91 is disposed oppositely below the intake port 84, and sucks outside air from the surface facing the intake port 84 via the intake port 84, and from the surface opposite to the surface facing the intake port. The inside air is sucked and flows into a vertical duct 92 disposed below the suction blower 91. The air flowing into the vertical duct 92 moves downward and is sent to the horizontal duct 93 connected at the lower part of the vertical duct 92.

  A heat sink 13 attached to the back side of the image generation surface of the DMD 12 is disposed in the horizontal duct 93, and the heat sink 13 is cooled by the air flowing through the horizontal duct 93. By cooling the heat sink 13, the DMD 12 can be efficiently cooled, and the DMD 12 can be prevented from reaching a high temperature.

  The air that has moved through the horizontal duct 93 flows into the passage 65 or the opening 65a provided in the light source bracket 62 of the light source 60 shown in FIG. The air flowing into the opening 65a flows between the opening / closing cover 54 and the light source bracket 62, and cools the opening / closing cover 54.

  On the other hand, the air that has flowed into the passage portion 65 cools the light source bracket 62 and then flows into the portion of the light source 61 opposite to the light exit side, and cools the light source 61 on the side opposite to the reflecting surface of the reflector 67. Thus, the reflector 67 of the light source 61 is cooled. Therefore, the air passing through the passage portion 65 takes heat from both the light source bracket 62 and the light source 61. The air that has passed near the reflector 67 passes through the exhaust duct 94 that guides the air from the height of the light source bracket 62 to the height near the lower portion of the exhaust fan 86, and then merges with the air exhausted from the light source exhaust port 64C. The fluid guide 87 is passed to the exhaust port 85. The exhaust fan 86 exhausts the exhaust port 85. The air flowing between the opening / closing cover 54 and the light source bracket 62 through the opening 65 a cools the opening / closing cover 54, moves inside the apparatus, and is discharged from the exhaust port 85 by the exhaust fan 86. .

FIG. 22 is a perspective view showing the cooling unit 120 together with the illumination unit 20 and the light source unit 60, and the positional relationship among the cooling unit, the illumination unit 20, and the light source unit 60 is as illustrated.
As shown in the figure, the horizontal duct 93 can be disposed below the illumination unit 20 by the legs 29 that support the weight of the image forming unit 10, the first optical unit 30, and the second optical unit 40 of the illumination unit 20. It can be seen that space can be secured.

  FIG. 23 is a cross-sectional view of FIG. 22, and arrows indicate the flow of air from the intake blower 91 through the passage portion 65 to the vicinity of the reflector 67. The air flowing in from the intake blower 91 flows as shown by arrows K0, K1, and K3. Since the light source section 60 is mounted on the projector 1 so that the light source bracket 62 and the passage section 65 face the base member 53, the flow path for cooling the reflector 67 of the light source 61 and the heat sink 13 are cooled. Since the horizontal duct 93, which is a road, is also provided in the base member 53, the width in the direction perpendicular to the projection plane of the projector 1 can be reduced.

FIG. 24 is a perspective view showing the base member 53, the horizontal duct 93, and the light source bracket 62.
As shown in the drawing, the horizontal duct 93 is fixed to the base member 53 of the projector 1, and a part of the upper surface thereof is opened. The image forming unit is disposed on the horizontal duct 93 so that the heat sink 13 of the image forming unit 10 passes through the opening.

FIG. 25 is a view of the air flow from the horizontal duct 93 to the light source bracket 62 as seen from below, and FIG. 26 is a view as seen from above.
As shown in FIGS. 25 and 26, the air that has moved in the horizontal duct 93 flows into the passage portion 65 or the opening portion 65 a provided in the light source bracket 62 of the light source portion 60. The air flowing into the opening 65a flows between the opening / closing cover 54 and the light source bracket 62, and cools the opening / closing cover 54. Accordingly, heat can be taken from the opening / closing cover 54. Further, the passage portion 65 itself is deprived of heat by the air on both the light source 61 side and the opening / closing cover 54 side.

  In the present embodiment, a halogen lamp, a metal halide lamp, a high-pressure mercury lamp, or the like is used as the light source 61, and the light source 61 becomes high temperature when it emits light. The light source bracket 62 and the opening / closing cover 54 also become high temperature due to heat conduction or radiant heat from the light source. When the light source 61 has reached the end of its service life and the light source unit 60 is to be replaced, the light source unit 60 must be picked up by hand so that the temperature of the open / close cover 54 and the light source bracket 62 does not decrease. There is a problem that 60 cannot be replaced. However, in the present embodiment, as described above, the light source bracket 62 is provided with the passage portion 65, air is caused to flow therethrough to cool the light source bracket 62, and the air is also provided between the opening / closing cover 54 and the light source bracket 62. And the open / close cover 54 is also cooled. Thereby, the temperature rise of the opening / closing cover 54 and the light source bracket 62 can be suppressed. Thereby, after the apparatus is stopped, the temperature of the opening / closing cover 54 and the light source bracket 62 can be quickly lowered to a temperature that can be grasped by the user. Therefore, when the life of the light source 61 comes to an end during use of the apparatus and the light source unit 60 needs to be replaced, the user can grasp the opening / closing cover 54 and the handle unit 66 at an early stage. Therefore, it can be replaced with a new light source unit 60 at an earlier stage than before, and the downtime of the apparatus can be shortened.

  Further, in the present embodiment, the passage portion 65 protrudes from the opening / closing cover 54 and can be used as a handle portion for the user to grasp and take out the passage portion 65 when the light source portion 60 is replaced. Yes. As described above, the passage portion 65 is a portion that is actively cooled by the inflow of air, and the temperature of the light source bracket 62 is kept low. Therefore, by taking this passage part 65 and making it usable as a part, it can be replaced with a new light source part 60 at an earlier stage, and the downtime of the apparatus can be further shortened.

  Further, in the present embodiment, as described above, the passage portion 65 is provided in the light source bracket 62 and the light source bracket 62 is cooled, so that the temperature rise of the light source 61 is suppressed. Therefore, the light source 61 can be cooled satisfactorily even if the flow rate of the air flowing into the light source 61 is less than the conventional flow rate. Thereby, the rotation speed (rpm) of the light source blower 95 can be reduced, the wind noise of the light source blower 95 can be suppressed, and the noise of the apparatus can be suppressed. Moreover, since the rotation speed (rpm) of the light source blower 95 can be reduced, the power saving of the apparatus can be achieved. Further, a small light source blower 95 with a small air volume can be used, and the apparatus can be miniaturized.

  In the projector 1 of this embodiment, the opening / closing cover 54 is provided with a pressing unit that presses the light source unit 60 against the apparatus main body, and the light source unit 60 is pressed by the pressing unit of the opening / closing cover 54. The light source unit 60 is fixed to the apparatus main body. Below, it demonstrates concretely using drawing.

FIG. 27 is a perspective view showing the opening / closing cover 54.
As shown in FIG. 27, the opening / closing cover 54 has an opening 155 for attaching a rotation operation portion 54a as an operation member, and three rotation operation portions 54a are provided around the opening 155. Claw portions 153a to 153c for being attached to the opening / closing cover 54 so as to be rotatable are provided. Further, one end (the left end portion in the figure) of the opening / closing cover 54 has two hook portions 151 for hooking on the edge portion of the light source portion outlet 53c (see FIG. 32) which is an opening portion of the base member 53. ing. Further, between the hook portion 151 and the opening portion 155, the second light source unit 60 abuts on both sides of the passage portion 65 of the light source bracket 62, and serves as a second pushing means for pushing the light source unit 60 in the light source unit 60 mounting direction. A pair of push projections 152 is provided. Further, on the right side in the drawing around the opening portion 155, a disengagement suppressing protrusion 154 that suppresses the rotation operation portion 54a from being detached from the opening / closing cover 54 is provided. In addition, on the side of the pressing protrusion 152 around the opening 155, when the rotation operation unit 54a reaches the fixing release position as the second state of the opening / closing cover 54, the fixing unit 161 of the rotation operation unit 54a abuts. A contact portion 156 is provided.

FIG. 28 is a perspective view showing the rotation operation unit 54a.
As shown in FIG. 28, the base of the rotation operation unit 54 a has a circular shape whose diameter is slightly shorter than the diameter of the opening 155 so as to be accommodated in the opening 155 of the opening / closing cover 54. Two fixing portions 161 (provided in the vertical direction in the figure) for fixing the opening / closing cover 54 to the base member 53, extending in the circumferential direction, and radially extending in the circular rotation operation portion 54a A protruding collar 162 is formed. The collar portion 162 is provided with notches 163 at four locations in the circumferential direction. Of the four collars 162, when assembling the rotation operation part 54a to the opening / closing cover 54, the collar part 162a on the front side in the figure facing the disengagement prevention projection 154 is on one end side (left side in the figure). The radial height M2 on the other end side (the right side in the figure) is higher than the radial height M1, and the radial height gradually increases from one end side to the other end side. It has become a shape. The radial height M2 on the other end side of the flange 162a is higher than the radial height of the other flange 162a.

  In addition, a columnar urging member attaching portion 165 to which the urging member 170 shown in FIG. 29 is attached is provided in the rotation operation portion 54a with an interval of about 180 ° in the rotation direction of the rotation operation portion 54a. . Further, a biasing member positioning portion 166 for positioning the biasing member 170 shown in FIG. 29 is provided on the circumference of the rotation operation portion 54a.

FIG. 29 is a perspective view showing a state in which the urging member 170 is attached to the rotation operation unit 54a.
The urging member 170 is formed by processing a sheet metal, and has two through holes through which the urging member attaching portion 165 of the rotation operation portion 54a penetrates. A plurality of urging members 170 are provided around the through hole. A claw portion 171 is provided. The urging member attaching portion 165 of the rotation operation portion 54a is passed through the through hole, and the urging member 170 is abutted against the urging member positioning portion 166, whereby the urging member 170 can be positioned on the rotation operation portion 54a. it can. Further, the claw 173 provided around the through hole is caught by the urging member attaching portion 165, and the urging member 170 is fixed to the rotation operation portion 54a.

  Further, the urging member 170 protrudes toward the light source side (upward in the drawing) by bending, and comes into contact with the passage portion 65 of the light source bracket 62 when the open / close cover 54 is fixed to the base member 53. Two plate spring portions 172 for urging the portion 60 in the mounting direction are provided. Therefore, the passing portion 65 can be urged at two points that are separated from each other. Each leaf spring portion 172 is downstream in the rotation direction (hereinafter referred to as a fixed rotation direction) when the rotation operation portion 54a is rotated from the fixed release position of the rotation operation portion 54a to the fixed position (counterclockwise in the drawing). It is formed so as to gradually protrude toward the light source part as it goes to the upstream side.

FIG. 30 is an enlarged configuration diagram around the fixed portion 161.
As shown in FIG. 30, a fitting recess that fits with a fitting protrusion 253 (see FIG. 31) provided on the base member 53 is provided on the lower surface (the surface facing the base member 53) of the fixed portion 161. 161a is provided. A push-back portion 161b for pushing back the fitting convex portion 253 shown in FIG. 31 is provided adjacent to the fitting concave portion 161a on the downstream side (right side in the drawing) of the rotation operation portion 54a with respect to the fitting concave portion 161a. ing. The push-back portion 161b has a tapered shape that gradually separates from the base member 53 from upstream to downstream in the fixed rotation direction of the rotation operation portion 54a. Further, on the upstream side (left side in the figure) of the rotation operation portion 54a with respect to the fitting recess 161a, the rotation operation portion 54a is gradually separated from the base member 53 from the upstream to the downstream in the fixed rotation direction. A tapered fitting maintaining portion 161c is provided.

FIG. 31 is a schematic configuration diagram showing the periphery of the light source part extraction port 53 c of the base member 53.
As shown in FIG. 31, when the rotation operation portion 54a is in the fixed position, a fitting convex portion 253 that fits the fitting concave portion 161a of the fixing portion 161 is provided in each notch portion 53d. Each fitting convex portion 253 has a trapezoidal shape when viewed from the Z direction and a semicircular shape when viewed from the X direction.

FIG. 32 is a perspective view for explaining a state in which the rotation operation unit 54 a is attached to the opening / closing cover 54.
When the rotation operation unit 54a is assembled to the opening 155 of the opening / closing cover 54, first, as shown in FIG. 32A, the notch 163a of the rotation operation unit 54a is placed at the position of the claw 153a, and the notch 163c is inserted. After aligning the notch 163d at the position of the claw portion 153b and the position of the claw portion 153c, the rotation operation portion 54a is assembled to the opening portion 155 of the opening / closing cover 54. Thereby, the rotation operation part 54a can be assembled | attached to the opening part 155 of the opening-and-closing cover 54, without the collar part 162 colliding with the nail | claw parts 153a-153c. Further, at this time, the vicinity of one end side of the flange portion 162 a facing the disengagement suppressing protrusion 154 faces the disengagement suppressing protrusion 154.

  When the rotation operation unit 54a is assembled to the opening 155 of the opening / closing cover 54, the rotation operation unit 54a is rotated in the direction of arrow E (clockwise in the drawing). Then, the collar part 162 enters between the claw parts 153 a to 153 c and the base surface 157 of the opening / closing cover 54. In addition, the flange 162a comes into contact with the disengagement suppressing protrusion 154. When a force is further applied from this state to rotate the rotation operation portion 54a, the disengagement suppressing projection 154 is elastically deformed, and the disengagement suppressing projection 154 gets over the flange 162a. Thereby, as shown in FIG. 32 (b), the rotation operation portion 54 a is rotatably attached to the opening / closing cover 54. Since the disengagement suppressing protrusion 154 is provided at a position where it does not come into contact with the other flange 162, the disengagement suppressing protrusion 154 operates the rotation operation part 54a to release the fixing of the opening / closing cover 54. When it is fixed or fixed, there is no resistance to operation.

  When the rotation operation unit 54a is rotated counterclockwise in the drawing from the state of FIG. 32 (b), it comes into contact with the other end of the flange 162a, and the disengagement suppression projection 154 regulates the rotation of the rotation operation unit 54a. . Accordingly, it is possible to prevent the notches 163a, 163c, and 163d of the rotation operation unit 54a from being rotated to the positions facing the claw portions 153a, 153b, and 153c, respectively. It is possible to prevent the rotation operation unit 54a from being detached from the opening / closing cover 54 after the attachment.

  When the rotation operation unit 54a is attached to the opening / closing cover 54 in this way, the urging member 170 is attached to the rotation operation unit 54a as shown in FIG. Note that the rotation operation unit 54 a to which the urging member 170 is attached may be attached to the opening / closing cover 54.

Next, fixing the opening / closing cover 54 to the base member 53 as the apparatus main body will be described.
FIG. 33 is a perspective view when the opening / closing cover 54 is assembled to the light source part outlet 53 c of the base member 53.
As shown in FIG. 33, the edge part of the light source part extraction port 53c of the base member 53 protrudes to the inner side (upper side), and a notch 53d is provided at a location facing the fixed part 161 of the rotation operation part 54a. ing. Also, the edge portion (left side in the figure) of the light source portion outlet 53c is cut out at two places, and a hooked portion 53e for hooking the hook portion 151 of the opening / closing cover 54 is formed.

  Further, the opening / closing cover 54 is configured to be more elastically deformed than the light source unit 60 or a member (the lighting bracket 26 or the power supply side connector 171) having an abutting unit that abuts when the light source unit 60 is attached to the apparatus main body. ing.

  When the rotation operation unit 54a is in the fixing release position, the fixing unit 161 does not face the notch 53d. When fixing the opening / closing cover 54 to the base member 53, the rotation operation portion 54a is rotated counterclockwise in the drawing from the fixed release position.

FIG. 34 is a perspective view when the open / close cover 54 is fixed to the light source part outlet 53 c of the base member 53.
When the rotation operation unit 54a is at the fixed position, a part of the fixed unit 161 faces the notch 53d. As a result, the rotation operation unit 54 a reaches a fixing position where the opening / closing cover 54 is fixed to the base member 53, and the opening / closing cover 54 is fixed to the base member 53.

FIG. 35 is a perspective view seen from the direction of the arrow d in FIG.
As shown in FIG. 35, when the rotation operation portion 54a is at the fixed release position, the fitting convex portion 253 provided on the base member 53 is on the fixed rotation direction (arrow X direction in the drawing) side with respect to the fixed portion 161. Is located. When the rotation operation unit 54a is rotated in the direction of the arrow X in the figure, the fixing part 161 gradually approaches the fitting convex part 253, and the downstream end in the fixed rotation direction of the fixing part 161 (the right end in the figure of the push-back part 161b). However, at the same time as facing the notch 53d, it contacts the fitting convex portion 253. When the rotation operation portion 54a is further rotated in the direction of the arrow X in the figure, the fitting convex portion 253 contacts the push-back portion 161b and relatively moves to the fitting concave portion 161a. Since the height of the fitting protrusion 253 from the notch 53d is larger than the gap between the notch 53d and the fixing part 161, the fixing part 161 receives a force from the fitting protrusion 253. The rotation operation portion 54a is made of a material having a certain degree of elasticity such as resin, and the fixing portion 161 is shaped to be cantilevered by the rotation operation portion 54a. Therefore, when receiving a force from the fitting convex portion 253, the fixing portion 161 bends in a direction away from the base member 53. Thereby, the fitting convex part 253 moves the push-back part 161b relatively while pushing away the fixing part 161. Then, when the rotation operation portion 54a comes to the fixed position, as shown in FIG. 36, the fitting convex portion 253 is fitted with the fitting concave portion 161a. As a result, as shown in FIG. 34, the fixing part 161 faces the notch part 53d and the opening / closing cover 54 is fixed, and the rotation operation part 54a is positioned at the position where the opening / closing cover 54 is fixed (first). Status). As described above, the rotation operation unit 54a is fastened to prevent the rotation operation unit 54a from rotating in the opening / closing cover fixing release direction due to the vibration of the apparatus and the like, thereby preventing the opening / closing cover 54 from being released. it can.

  Moreover, when the fitting convex part 253 fits into the fitting concave part 161a, the rotational load of the rotation operation part 54a will decrease at a stretch. As a result, the user who operates the rotation operation unit 54 a has a click feeling and can notify the user that the opening / closing cover 54 is fixed to the base member 53.

  Further, the user mistakes that the opening / closing cover 54 is fixed when the load on the rotation operation portion 54a increases to some extent, and stops the rotation operation, so that the fitting convex portion 253 is fitted into the fitting concave portion 161a. There is a risk of not. However, in the present embodiment, as shown in FIG. 30, the push-back portion 161b is tapered so as to be gradually separated from the base member 53 from the upstream to the downstream in the fixed rotation direction of the rotation operation portion 54a. . Therefore, when the rotation operation portion 54a is stopped before the fitting convex portion 253 is fitted into the fitting concave portion 161a and the user releases the rotation operation portion, the rotation operation portion 54a is moved in the direction opposite to the fixed rotation direction. Rotate. Therefore, the user can recognize that the rotation is not fixed correctly by looking at the rotation of the rotation operation unit 54a.

  At this time, the rotation operation unit 54a rotates to a position where the rotation operation unit 54a does not receive a force from the fitting convex portion 253. That is, the rotation operation portion 54a rotates to a position where the downstream end in the fixed rotation direction of the fixed portion 161 (the right end in the drawing of the push-back portion 161b) contacts the fitting convex portion 253. At this position, the fixing portion 161 is in a state not facing the notch, and the fixing of the opening / closing cover is released. Therefore, when the fitting convex portion 253 is not fitted with the fitting concave portion 161, the opening / closing cover is not fixed to the base member 53.

  Further, since the rotation operation unit 54a rotates to a position where the rotation operation unit 54a does not receive a force from the fitting convex portion 253, the fixing unit 161 is not left in an elastically deformed state. Thereby, the fixing part 161 is not left in an elastically deformed state for a long period of time, and creep deformation of the fixing part 161 can be prevented.

  Moreover, in this embodiment, after the fitting convex part 253 fits into the fitting recessed part 161a, the rotation operation part 54 can be rotated in a fixed rotation direction. Therefore, depending on the user, the fitting convex portion 253 may be rotated after fitting into the fitting concave portion 161a. In the image projection apparatus developed by the present applicant shown in FIG. 43, as shown in FIG. 37, the fixing portion 161 is elastically deformed, and the left side in the drawing (downstream in the fixing operation direction) than the fitting recess 161a. ) Rides on the fitting protrusion 253. Also in this case, if it is left in this state, the fixing portion 161 may be creep-deformed or damaged.

  However, in the present embodiment, as shown in FIG. 38, when the user turns the rotation operation portion 54a too much, the fitting convex portion 253 comes into contact with the inclined fitting maintaining portion 161c. As described above, the fitting maintaining portion 161c is shaped so as to be gradually separated from the base member 53 from the upstream to the downstream in the fixed rotation direction of the rotation operation portion 54a. When released, the rotation operation unit 54a rotates in the direction opposite to the fixed operation direction. And as shown in FIG. 35, it returns to the position which the fitting convex part 253 and the fitting recessed part 161a fit naturally. Accordingly, the fixing portion 161 is not left as it is elastically deformed, and creep deformation of the fixing portion 161 can be suppressed.

  If the rotation operation unit 54a is rotated too much, as shown in FIG. 38, the fixing unit 161 abuts against the end of the notch. Therefore, it is possible to prevent the contact of the fitting convex portion 253 from the fitting maintaining portion 161c by releasing the rotation operation portion 54a too much.

Further, in the present embodiment, when the opening / closing cover 54 is fixed to the base member 53, the light source unit 60 is pushed in a direction away from the base member 53, and the light source unit 60 is positioned and fixed in the apparatus main body. FIG. 39 is a diagram for explaining pushing of the light source unit 60 when the opening / closing cover 54 is fixed to the light source unit outlet 53c of the base member 53.
As shown in FIG. 39A, when the light source unit 60 is inserted into the apparatus main body, the light source positioning units 26a1 to 26a3 provided on the illumination bracket are positioned on the positioning units 64a1 to 64a3 provided on the holder 64 of the light source unit 60. And the male power-side connector 171 is fitted into the female connector portion 62a. Thereby, the light source unit is positioned and fixed in the Z direction and the X direction in the apparatus main body.

  When attaching the opening / closing cover 54 to the light source portion outlet 53c of the base member 53, first, the hooking portion 151 is hooked on the hooked portion 53e, and the opening / closing cover 54 is rotated clockwise with the hooking portion 151 as a fulcrum. Let As the opening / closing cover 54 is rotated, the pair of pushing projections 152 provided on the hooking portion 151 side comes into contact with both sides of the passage portion 65 of the light source bracket 62. When the opening / closing cover 54 is further rotated from this state, the pair of pushing projections 152 pushes the holder 64 side of the light source unit 60. As a result, the surface 64d2 (see FIG. 6) on which the positioning projection 64a3 of the holder 64 of the light source unit 60 is provided abuts against the edge T1 of the light source positioning hole 26a3 as an abutting portion provided on the illumination bracket 26. . Further, the surface 64d1 (see FIG. 6) provided with the positioning holes 64a1 and 64a2 of the holder 64 abuts the surface T2 provided with the light source positioning projections 26a1 and 26a2 of the illumination bracket 26 as the abutting portion. Thereby, the holder 64 side of the light source unit 60 is sandwiched and fixed by the push-in protrusion 152 and the illumination unit 20. Then, as shown in FIG. 39 (b), the open / close cover 54 is assembled to the light source section outlet 53c. The state at this time is shown in FIG. FIG. 40 is a perspective view showing the illumination unit 20, the light source unit 60, and the base member 53.

  In the present embodiment, the push-in protrusion 152 is provided in the vicinity of the hook portion 151 that is a fulcrum of rotation when the opening / closing cover 54 is rotated when the opening / closing cover 54 is assembled to the light source portion outlet 53c. The action point in the lever principle with the hook portion 151 as a fulcrum is a contact portion of the push-in projection 152 with the light source portion 60, and the power point is an end portion of the opening / closing cover 54 opposite to the hook portion 151. Thus, the point of action in the lever principle is on the fulcrum side of the force point, so that the light source unit 60 can be pushed in the mounting direction with a small force, and the attachment of the opening / closing cover 54 to the light source unit outlet 53c is easy. Can be done.

  Further, as shown in FIGS. 39B and 41, when the rotation operation portion 54 a is in the fixed release position, the leaf spring portion 172 faces the passage portion 65 of the light source bracket 62, and the light source portion 60. Has not yet been pushed in by the leaf spring part 172. As shown in FIG. 39, the length from the surface of the urging member 170 to the downstream end of the leaf spring portion 172 in the fixed rotation direction is longer than the gap between the urging member 170 and the passage portion 65. Yes.

  When the rotation operation portion 54a is rotated from the release position to the fixed position, the upstream end portion in the fixed rotation direction of the leaf spring portion 172 comes into contact with the passage portion 65 as the pushed-in portion of the light source bracket and elastically deforms. Further, when the rotation operation portion 54a is rotated to the fixed position, the elastic deformation amount of the leaf spring portion 172 gradually increases, and the urging force (pushing force) against the passage portion 65 gradually increases. In this way, the light source 60 is pushed by the leaf spring 172, so that the male power connector 171 is completely inserted into the female connector 62a, and the power connector 171 and the connector 62a are securely connected. Connected to. Moreover, the edge part of the connector part 62a bumps against the butting part T3 of the power supply side connector part 171. Then, when the rotation operation portion 54a comes to a fixed position (a position where the fitting recess 161a is fitted to the fitting projection 253), as shown in FIG. 39 (c) and FIG. The light source part 60 is pushed into the connector part 62a side by the urging force of. Thereby, the connector part 62 a side of the light source part 60 is clamped and fixed by the leaf spring part 172 and the abutting part of the power supply side connector 171.

  Thus, when the open / close cover 54 is fixed to the base member 53 of the apparatus main body, the light source unit 60 is pushed by the two leaf springs 172, and the light source unit 60 is clamped and fixed in the apparatus main body. The Thereby, the light source part 60 is positioned and fixed in the Y direction. Further, a member that pushes in the light source unit 60 is an elastic member such as a leaf spring unit 172. Due to the accumulation of dimensional errors, the gap between the urging member and the passage portion becomes larger or smaller than a specified value. In the case where the member to be pushed is a member that is not easily elastically deformed, the gap between the biasing member and the passing portion is a specified value if the light source portion is pushed in even if the gap between the biasing member and the passing portion is larger than the specified value. When it is smaller than that, the pushing force becomes excessive. As a result, a large force is applied to a member (lighting bracket 26 or power supply side connector 171) having an abutting portion that abuts when the light source unit 60 is attached to the apparatus main body, which may be deformed or damaged. is there. In addition, the opening / closing cover 54 may not be fixed to the base member.

  On the other hand, as in the present embodiment, the member that pushes in the light source unit 60 is easily elastically deformed as an elastic body such as the leaf spring unit 172, so that it is less likely to be elastically deformed. The fluctuation of the pushing force due to the fluctuation of the gap with the part can be reduced. Thereby, even when the gap between the urging member and the passage part becomes larger than the specified value, the light source part 60 can be pushed into the apparatus main body side satisfactorily. Further, even when the gap between the urging member 170 and the passage portion 65 becomes smaller than a specified value, the member having an abutting portion that abuts when the light source unit 60 is attached to the apparatus main body because the pushing force becomes excessive. It is possible to prevent the lighting bracket 26 and the power supply side connector 171 from being deformed or damaged. Further, it is possible to prevent the opening / closing cover 54 from being fixed to the base member.

  Further, the leaf spring part 172 is formed so as to gradually protrude toward the light source part as it goes from the downstream side in the fixed rotation direction to the upstream side, so that the pushing force gradually increases. It is possible to prevent a sudden increase in operating resistance when the part 54a is rotated from the fixed release position to the fixed position. Accordingly, the pressing portion 165 can be brought into contact with the passage portion 65 at two points apart from each other without requiring a large force when the rotation operation portion 54a is rotated to the fixed position.

  In addition, since a plurality of leaf springs 172 are provided at equal intervals in the rotation direction of the rotation operation unit 54a, when the rotation operation unit 54a is rotated toward the fixed position and the light source unit 60 is pushed in, the reaction of the pushing force is rotated. It applies equally to the operation unit 54a. Therefore, when rotating the rotation operation unit 54a to the fixed position, it is possible to prevent the rotation operation unit 54a from being inclined and the collar 162 of the rotation operation unit 54a from rubbing against the claw portion 153a. Accordingly, it is possible to suppress a situation such as an increase in operation resistance when the rotation operation unit 54a is moved to the fixed position.

  Further, when the opening / closing cover 54 is removed from the base member 53, the rotation operation unit 54a is rotated in the opposite direction to the above. Then, the fixing part 161 does not face the notch 53d, and the fixing of the opening / closing cover 54 with the base member 53 is released. When the rotation operation unit 54a is further rotated from this state, the fixing unit 161 comes into contact with the abutting unit 156, and the rotation of the rotation operation unit 54a is prevented. Accordingly, it is possible to notify the user who is operating the rotation operation unit 54a that the fixing of the opening / closing cover 54 with the base member 53 has been released.

  As described above, in this embodiment, the opening / closing cover 54 can be fixed and released by operating the rotation operation unit 54a. Unlike the case where the opening / closing cover 54 is fastened with screws, a screw driver or the like is used. The light source unit 60 can be replaced without preparing the tool. Thereby, replacement of the light source unit 60 can be easily performed.

  In addition, the light source unit 60 can be positioned and fixed in the Y direction (device attachment / detachment direction of the light source unit 60) in conjunction with the operation of fixing the opening / closing cover to the base member 53 of the apparatus main body. The light source unit 60 can be exchanged. Furthermore, since the positioning and fixing of the light source unit 60 in the Z direction and the X direction can be performed simply by mounting the light source unit 60 on the apparatus main body, the light source unit 60 can be replaced with a simpler operation. .

  Further, in the present embodiment, as described above, the push-back portion 161a and the fitting maintaining portion 161c are provided, and the opening / closing cover 54 is fixed to the base member 53 in a state where the fitting convex portion 253 is pressed. Absent. When the opening / closing cover 54 is fixed to the base member 53 in a state where the fitting convex portion 253 is pressed, the opening / closing cover 54 and the rotation operation portion 54 a are separated from the light source unit 60 by the pressing force of the fitting convex portion 253. May be bent. As a result, the pair of push projections 152 are separated from the light source unit 60, and the holder 64 side of the light source unit 60 is not sandwiched and fixed by the push projections 152 and the illumination unit 20. Further, the biasing force of the leaf spring portion 172 is weakened. As a result, there is a possibility that the light source unit 60 may be rattled in the apparatus main body.

  On the other hand, in the present embodiment, as described above, the push-back portion 161a and the fitting maintaining portion 161c are provided, and the opening / closing cover 54 is fixed to the base member 53 with the fitting convex portion 253 pressed against it. Absent. Therefore, the opening / closing cover 54 is not fixed to the base member 53 in a state in which the opening / closing cover 54 and the rotation operation unit 54 a are bent in the direction away from the light source unit 60 by the pressing force of the fitting convex portion 253. Thereby, the light source part 60 can be favorably clamped and fixed in the apparatus main body, and it can suppress favorably that the light source part 60 rattles in the apparatus.

  Further, the operation member 54a may be configured to reciprocate linearly with respect to the opening / closing cover 54. However, when the operation member 54a is configured to rotate with respect to the opening / closing cover 54, the following advantages can be obtained. That is, the amount of operation can be increased by reciprocating linearly with respect to the opening / closing cover 54 as compared with a case where the opening / closing cover 54 is fixed and released. Thereby, the inclination of a push-back part and the inclination of a leaf | plate spring part can be loosened. Thereby, it can suppress that force is added suddenly. Thereby, it is possible to suppress the breakage of the fixing portion 161 due to repeated load and the breakage of the members (the lighting bracket 26 and the power supply side connector 171) having the abutting portion that abuts when the light source unit 60 is attached to the apparatus main body. it can.

What has been described above is merely an example, and the present invention has a specific effect for each of the following aspects (1) to (9).
(1)
An image forming unit A that forms an image using light from a light source 61 provided in a light source unit 60 configured to be detachable from the apparatus main body, a projection optical unit B that projects an image, and a light source unit 60. In an image projection apparatus such as the projector 1 provided with an opening / closing cover 54 for opening / closing an opening such as a light source section outlet 53c provided for attachment to and detachment from the apparatus main body, the opening / closing cover 54 is fixed to the apparatus main body. An operation member such as a rotation operation unit 54a movably attached to the opening / closing cover 54 so that the first state and the second state in which the fixation is released can be selectively taken by an operation; A fitting recess 253 provided on either one of them and a fitting projection 161a provided on the other and fitted with the fitting recess 253, and the operation member is moved from the second state to the first state. Then, while the fitting convex portion 253 is pressed against the surface having the fitting concave portion 161a, the fitting convex portion 253 relatively moves toward the fitting concave portion 161a, and the fitting convex portion 253 becomes the fitting concave portion 161a. When the operation member is stopped before the fitting protrusion 253 is fitted in the fitting recess 161a, the operation member is moved to the second state. There are provided push-back means such as a push-back unit 161a that pushes back in the direction opposite to the fixed operation direction when operating the operation member so as to change from the state to the first state.
With this configuration, as described in the embodiment, the operation member can be prevented from creeping, and the opening / closing cover can be prevented from being fixed to the apparatus main body due to vibration or the like. be able to.

(2)
In the image projection apparatus according to the aspect described in (1) above, when the push-back means such as the push-back unit 161a operates the operation member such as the rotation operation unit 54a so as to change from the second state to the first state. It is an inclined portion that is formed at a position where the fitting convex portion 253 of the surface having the fitting concave portion 161a is pressed against, and the gap with the surface having the fitting convex portion 253 gradually narrows toward the fitting concave portion 161a.
With this configuration, as described in the embodiment, the operation member can be pushed back in the direction opposite to the fixed operation direction when operating the operation member so as to change from the second state to the first state. .

(3)
Further, an image forming unit A that forms an image using light from a light source 61 provided in a light source unit 60 that is configured to be detachable from the apparatus main body, a projection optical unit B that projects an image, and a light source unit the image projection apparatus such as a projector 1 and a cover 54 for opening and closing the opening, such as the light source unit outlet 53c provided for mounting and demounting the 60 from the apparatus main body, cover 54 is opened and closed cover An operation member such as a rotary operation unit 54a movably attached to the opening / closing cover 54 so that a first state in which the fixing device is fixed to the apparatus main body and a second state in which the fixing is released can be selectively taken by operation. A fitting recess 161a provided in one of the apparatus main body and the operation member, and a fitting protrusion 253 provided in the other and fitted with the fitting recess 161a. When the operating member is operated as described above, the fitting convex portion 253 relatively moves toward the fitting concave portion 161a while pressing the fitting convex portion 253 against the surface having the fitting concave portion 161a, and the fitting convex portion When the fitting convex part 253 passes the fitting concave part 161a, the fitting convex part 253 is fitted into the fitting concave part when the fitting convex part 253 passes the fitting concave part 161a. And a fitting maintaining means such as a fitting maintaining portion 161c to be pushed back to 161a.
By providing such a configuration, as described in the embodiment, even if the operation member is stopped when it is further rotated from the first state, the operation member rotates itself, and the fitting convex portion 253 and the fitting concave portion 161a Can be returned to the fitting position. Thereby, it is possible to suppress creep deformation of the operation member.

(4)
In the image projection device according to the aspect described in (1) or (2) above, when the fitting convex portion 253 passes the fitting concave portion 161a, the fitting convex portion 253 is pushed back to the fitting concave portion 161a. Fitting maintenance means such as a maintenance part 161c is provided.
By providing such a configuration, as described in the embodiment, even if the operation member is stopped when it is further rotated from the first state, the operation member rotates itself, and the fitting convex portion 253 and the fitting concave portion 161a Can be returned to the fitting position. Thereby, it is possible to suppress creep deformation of the operation member.

(5)
In the image projection apparatus according to the aspect described in (3) or (4) above, the fitting maintaining means such as the fitting maintaining portion 161c is fitted when the fitting convex portion 253 passes the fitting concave portion 161a. It is an inclined portion that is formed at a place where the fitting convex portion 253 of the surface having the mating concave portion 161a is pressed against, and the gap with the surface of the fitting convex portion 253 is gradually narrowed away from the fitting concave portion 161a.
With this configuration, as described in the embodiment, when the fitting convex portion 253 passes the fitting concave portion 161a, the fitting convex portion 253 can be pushed back to the fitting concave portion 161a.

(6)
The image projection device according to any one of the above (1) to (5) includes an abutting portion against which the light source unit 60 abuts when the light source unit 60 is attached to the apparatus main body, and an open / close cover 54 is provided with pushing means such as a leaf spring part 172 that contacts the light source part 60 and pushes the light source part 60 into the abutting part when the operation member is operated so as to change from the second state to the first state.
With this configuration, as described in the embodiment, when the opening / closing cover 54 is fixed to the apparatus main body, the light source unit 60 is pressed toward the abutting unit by the pushing unit, and the light source unit 60 is abutted against the pushing unit. It is clamped and fixed by the part. In this way, the light source unit 60 is fixed in conjunction with the fixing of the opening / closing cover 54 to the apparatus main body, so that the light source unit 60 is fixed separately from the operation for fixing the opening / closing cover 54 to the apparatus main body. Compared with the image projection apparatus described in Patent Document 1 that requires this operation, the light source unit 60 can be replaced easily.
In the present embodiment, the abutting portion includes the edge T1 of the light source positioning hole 26a3 of the illumination bracket 26, the surface T2 provided with the light source positioning protrusions 26a1 and 26a2 of the illumination bracket 26, and the power supply side connector portion 171. The abutting portion T3.

(7)
In the image projection apparatus according to the aspect described in (6) above, the push-in unit includes a biasing unit such as a leaf spring unit 172 that biases the light source unit 60 to the abutting unit.
By providing such a configuration, even if the gap between the operation member and the light source unit varies as described in the embodiment, it is possible to suppress a large variation in the force for pushing the light source unit.

(8)
Further, in the image projection apparatus according to the aspect described in (6) or (7) above, the pushing means such as the leaf spring portion 172 pushes the light source 60 against the light source 60 by operating the operation member that changes from the second state to the first state. The composition gradually increased.
By adopting such a configuration, as described in the embodiment, it is possible to prevent a sudden increase in operating resistance when operating the operating member from the second state to the first state. Thereby, when making an operation member into a 1st state, it can be set as a 1st state, without requiring big force. Thereby, an operation member can be operated easily.

(9)
In the image projection apparatus according to any one of the above (1) to (8), the operation member is rotatably attached to the opening / closing cover 54.
By providing such a configuration, as described in the embodiment, it is possible to increase the amount of operation of the operation member as compared with the case where the operation member is attached to the opening / closing cover so as to linearly move. Thereby, compared with the case where it comprises so that an operation member may be linearly moved, the inclination of a push-back part or an inclination part, and the inclination of a leaf | plate spring part can be made loose. Thereby, compared with the case where it comprises so that an operation member may be linearly moved, the increase amount of the force concerning the operation member with respect to the amount of rotation operations can be decreased. Thereby, the fracture | rupture of the operation member by the repetition excess when changing from a 2nd state to a 1st state can be suppressed.

1: Projector 10: Image forming unit 20: Illuminating unit 40: Optical unit 53: Base member 53c: Light source outlet 53d: Notch 53e: Hook 54: Opening / closing cover 54a: Rotating operation unit 60: Light source 61: Light source 62a: Connector part 64: Holder 65: Passing part 70: Optical system 161: Fixing part 161a: Fitting concave part 161b: Push-back part 161c: Fitting maintaining part 170: Energizing member 172: Leaf spring part 253: Fitting convex Part 253 fitting convex part A: image forming system B: projection optical system

JP 2010-113132 A

Claims (6)

An image forming unit for forming an image by using light from a light source provided in the light source unit which is detachably mountable relative to instrumentation Okimoto body,
A projection optical unit for projecting the image;
In an image projection apparatus comprising: an opening / closing cover that opens and closes an opening provided to attach / detach the light source unit to / from the apparatus main body;
A first state for fixing the opening and closing cover to the device body, an operating member movably mounted relative to the cover so that it can take selectively by the operation and a second state in which the fixing is released,
A fitting recess provided in one of the apparatus main body and the operation member, and a fitting protrusion provided in the other and fitted with the fitting recess, are changed from the second state to the first state. When the operating member is operated, the fitting convex portion relatively moves toward the fitting concave portion while pressing the fitting convex portion against the surface having the fitting concave portion, and the fitting convex portion A fastening means for fastening the operation member in the first state by fitting with the fitting recess,
An image projection apparatus comprising: a fitting maintaining unit that pushes back the fitting convex portion into the fitting concave portion when the fitting convex portion passes the fitting concave portion. The image projection apparatus according to claim 1 .
The fitting maintaining means is formed at a location where the fitting convex portion of the surface having the fitting concave portion presses when the fitting convex portion passes through the fitting concave portion, and the fitting as the distance from the fitting concave portion increases. An image projection apparatus, characterized in that it is an inclined part in which a gap with a surface of a convex part is gradually narrowed. In the image projector of Claim 1 or 2 ,
When the light source unit is attached to the apparatus main body, the light source unit has an abutting unit that abuts,
The opening / closing cover is provided with pushing means for abutting the light source part and pushing the light source part into the abutting part when the operation member is operated so that the first state is changed from the second state to the first state. A characteristic image projection apparatus. The image projection apparatus according to claim 3 .
The image projecting apparatus according to claim 1, wherein the push-in unit includes a biasing unit that biases the light source unit toward the abutting unit. The image projection apparatus according to claim 3 or 4 ,
The image projecting apparatus according to claim 1, wherein the push-in means is configured to gradually increase a push-in force with respect to the light source unit by operating the operation member that changes the second state to the first state. In any of the image projection apparatus according to claim 1 to 5,
The image projection apparatus, wherein the operation member is rotatably attached to the opening / closing cover.

Images