JP2015161833A - image projection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image projection device that can measure the distance between a projection surface and the image projection device and easily determine an installation position of the image projection device with a simple configuration without increasing the size of the device.SOLUTION: An image projection device 1 includes an image projection device body 10 that projects images on an image projection surface 2 and a projection size display part 30 that can be removably attached to the image projection device body. The projection size display part 30 can be extended and retracted and describes the actual projection size on the image projection surface as a scale 31 along the extension and retraction direction.

Description

  The present invention relates to an image projection apparatus that projects light onto an image projection surface.

  When using the image projection apparatus (projector), it is necessary to manually adjust the focus of the projection image and correct the distortion of the projection image.

  However, there is a projector that can automatically perform focus adjustment using an autofocus function. One of the operations required for the autofocus function is to measure the distance to the projection surface (screen or the like) that is an object. Various devices have been devised for the distance measuring device for measuring the distance.

  Specifically, when the projector is installed, the distance between the projector and the projection surface may be measured in order to adjust the focus of the projection image and to correct the distortion of the projection image. Here, as a measurement method, a method using a distance sensor using infrared rays or the like for a projector is known. (For example, see Patent Document 1)

  However, when the distance sensor is mounted on the projector main body, the apparatus size is increased correspondingly, and the cost of the distance sensor is required. Further, if the position of the projector is corrected by the control inside the projector main body according to the measurement distance, the apparatus size further increases.

  Therefore, in view of the above circumstances, the present invention can easily determine the installation position of the image projection apparatus by measuring the distance between the projection surface and the image projection apparatus without increasing the size of the apparatus with a simple configuration. The purpose is to provide.

In order to solve the above-described problem, in one proposal of the present invention, an image projection apparatus includes:
An image projection apparatus main body for performing image projection on the image projection surface;
A projection size display unit detachably attached to the image projection apparatus main body;
The projection size display unit can be expanded and contracted, and an actual projection size on the image projection plane is described as a scale along the expansion and contraction direction.

  According to one aspect of the present invention, it is possible to easily determine the installation position of an image projection apparatus by measuring the distance between the projection surface and the image projection apparatus without increasing the size of the apparatus with a simple configuration.

It is a perspective view of a projector device and an image projection surface of a 1st embodiment of the present invention. 2A is a perspective view of the inside of the projector as viewed from the front of FIG. 1, and FIG. 2B is a perspective view of the inside of the projector as viewed from the back side of FIG. It is a figure for demonstrating arrangement | positioning of an optical engine and a light source device. It is a perspective view explaining the structure of an optical engine. It is a figure explaining the structure and optical path of an illumination optical system unit. It is a perspective view explaining an image display element unit. It is a figure for demonstrating a projection lens, an illumination optical system unit, and an image display element unit. It is a perspective view explaining a projection optical system unit. It is a side view explaining the optical path to the projector projection surface which is a side view when the projection optical system unit is projecting on the screen. It is a perspective view of the projector apparatus which installed the handle in embodiment of this invention. (A) is a side view of the projector apparatus which shows the movable range of a handle, (b) is a side view of the projector apparatus seen from another angle. It is the figure which looked at the installation state of the projector apparatus at the time of image projection from the side. It is the figure which looked at the installation state of the projector apparatus of FIG. 10 from the upper part. It is side surface sectional drawing of the support arm of the handle in the installation state shown in FIG. It is an enlarged view of the rotation part of a handle. It is the cross-sectional enlarged view seen from the inner side which shows the engagement state of a handle and a main-body protrusion. It is a perspective view of the projector apparatus of 2nd Embodiment of this invention. It is a side view of the projector apparatus which shows the movable range of the expansion-contraction rod which is a projection size display part in FIG. It is a perspective view of the projector apparatus of 3rd Embodiment of this invention. It is a side view of the projector apparatus which shows the tape measure which is a projection size display part in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a projector device (image projection device) 1 as an electronic apparatus according to an embodiment.

  The projector apparatus 1 according to the present invention is a compact vertical installation apparatus, and a handle 30 is attached to a projector body (apparatus body) 10 surrounded by a housing 12.

  A housing 12 of the projector main body 10 shown in FIG. 1 has an outer shape of a vertically long and substantially rectangular parallelepiped shape as a whole. In FIG. 1, the width direction (uniaxial direction in the horizontal plane) of the projector main body 10 is the X axis direction, the depth direction of the projector main body 10 (direction perpendicular to the X axis in the horizontal plane) is the Y axis direction, and the height of the projector main body 10. The direction (vertical direction) will be described as the Z-axis direction.

  An external configuration of the projector body 10 will be described with reference to FIG. An exterior part (housing) 12 covering the main body has a front cover 12a, a rear cover 12b, and a bottom wall 12c. As the material of the housing 12, a relatively light and durable material, or a plastic such as a hard resin is used.

  As shown in FIG. 1, a light receiving sensor 13, a sound emission port 14, and a focus adjustment lever 15 a are provided on the front wall (the −Y side wall, opposite to the projection direction) of the housing 12 from above. Yes. The light receiving sensor 13 receives an optical signal from a remote controller (remote controller) (not shown), converts the optical signal into an electric signal, and outputs it to the control device 81 (see FIG. 2B). The sound emission port 14 includes a plurality of through holes that emit sound output from a speaker (not shown).

  The focus adjustment lever 15a is provided in the window portion 15 which is a space for operation. The user moves the focus adjustment lever 15a to adjust the focal position (focus) of the projection lens 131 included in the projection optical system unit 130 (see FIG. 3).

  The focus adjustment lever 15a is configured to be slidable in the X-axis direction that is the width direction of the projector main body 10 (or rotatable about the Z-axis). The focus adjustment lever 15a is mechanically connected to the projection lens 131 via a driving force transmission mechanism (not shown) including, for example, gears. The driving force transmission mechanism moves a part of the lens elements constituting the projection lens 131 along the optical axis direction in accordance with the slide of the focus adjustment lever 15a. Thereby, the focal position of the projection lens 131 is adjusted.

  Specifically, when adjusting the position of the projector apparatus 1, the user sets the position of the apparatus body 10 using the handle 30 and determines the size of the projection screen (S 1, S 2, S 3, etc.) on the screen 2. After that, the focus is adjusted using the focus adjustment lever 15a. When the focus adjustment lever 15a is driven in one direction in the X-axis direction (or one direction around the Z-axis), the position (focal position) where the light projected through the projection lens 131 forms an image becomes far. On the other hand, when the focus adjustment lever 15a is driven in the other direction in the X-axis direction (or in the other direction around the Z-axis), the focal position becomes closer.

  Further, as shown in FIG. 1, the light projection port 16 and the operation unit 20 are provided on the upper surface (the upper wall on the + Z side) of the housing 12. The light projection port 16 is a polygonal (for example, hexagonal) opening in plan view formed on the side of the upper wall of the housing 12 close to the projection side. The light projection port 16 is closed by a transparent or translucent lid member. The light from the projection optical system unit 130 is projected outside the housing 12 through the lid member that closes the light projection port 16.

  The operation unit 20 includes a plurality of (for example, six) operation members (operation buttons) provided on the upper surface of the housing 12. On the upper surface of the housing 12, a power button 21, an input button 22 (input switching button), a mute button 23, and an enter button 24 (decision button) are shown in the region on the light projection port 16 -X side as operation units. They are arranged side by side from left to right.

  Under the housing 12, at least three short leg members 90 that are not collinear are provided. Here, in the projector main body 10, each component is arranged in the housing 12 so that the weight balance is closer to the −Y side (so that the −Y side is heavier than the + Y side). Is at the position on the −Y side (image projection side) of the center of the housing 12. With this configuration, the upper surface provided with the light projection port 16 can be tilted toward the projection surface side on which the screen 2 is disposed.

  In order to obtain such a center of gravity, in the present embodiment, two of the three leg members 90 are the -Y side and + X side corners and the -Y side and -X side of the bottom wall 12c of the housing 12, respectively. The other one is arranged at the center of the + Y side end of the bottom wall 12 c of the housing 12. With this arrangement, the projector main body 10 can be tilted while being supported stably on the predetermined horizontal plane via the three leg members 90 so as not to fall down at three points. The positions of the three leg members 90 may be set to appropriate positions according to the weight balance of the projector main body 10, and are not limited to those described above.

  On the side surface of the projector body 10, a handle 30 is attached to the rear cover 12b. Further, a main body protrusion 11 for engaging with an opening (see FIG. 15) of the handle 30 is provided above the connection portion of the handle 30. Thus, as described above, the handle 30 exists on the rear wall side where the center of gravity of the projector main body 10 on the image projection side is located, so that the posture when the user carries the projector device 1 with the handle 30 is maintained. Stabilize.

  Under the handle 30, an air inlet 17 is provided. A connector portion 19 having a plurality of connection terminals is formed under the intake port 17.

  Further, an exhaust port 18 is provided on the other side surface (upper left (−Z side) in FIG. 1) of the projector body 10 (see FIG. 11B).

  Here, the projector device is a device that generates an image based on image data input from a personal computer, a video camera, or the like, and projects and displays the image on, for example, the screen 2 (see FIG. 1). In recent years, liquid crystal projectors, among other projector apparatuses, have been improved in the resolution, the price, and the like due to the higher resolution of the liquid crystal panel, the higher efficiency of the light source lamp. In addition, among liquid crystal projectors, there are small and light projectors using DMD (Digital Micro-mirror Device), which are widely used not only in offices and schools but also at home. In particular, front-type liquid crystal projectors have improved portability and have been used for small meetings of several people.

  Therefore, in recent years, there has been a demand for projector devices that “a large screen image can be projected (a large projection screen)” and “a projection space required outside the device can be made as small as possible”.

  In order to meet this demand, the projector main body 10 of the projector device 1 according to the present embodiment employs an internal configuration as described below.

  The internal configuration of the projector main body 10 will be described with reference to FIGS. FIGS. 2A and 2B are perspective views of the projector body 10 with the exterior cover 12b removed from different directions.

  As an internal structure, the projector body 10 includes a light source device 60, an optical engine 100 (see FIG. 5), a control device 81, and the like inside a housing (exterior cover) 12.

  The control device 81 executes various control operations in accordance with the electric signal converted by the light receiving sensor 13 and the command content corresponding to the signal from the operation unit 20. The connection control device 82 is connected to the connector unit 19 and transmits input information from the terminal to the control device 81 or the image display element unit 120.

  FIG. 3 shows a perspective view of the light source device 60 and the optical engine 100 that are optical systems in the projector main body 10.

  In FIG. 3, as an example, the light source device 60 includes a light source lamp 61 including a light emitting unit, a light emitting tube, a reflector that surrounds the light emitting tube and has an opening that opens to the + X side (left side in FIG. 5). Here, for example, a high-pressure mercury lamp is employed as the arc tube. As the reflector, for example, a bowl-shaped one whose inner wall surface is a reflecting surface is employed.

  In addition to the light source lamp 61, the light source device 60 includes a light source housing 62 to which the light source lamp 61 is attached, and a light source base member 63 to which the light source housing 62 is attached. The light source housing 62 is a member that holds the light source lamp 61 and cools it by circulating air. An intake fan 71 and an exhaust fan 72 (see FIG. 2B) are connected to the light source housing 62 via a duct (not shown) or the like. The intake fan 71 takes in external air from the intake port 17 (see FIG. 1), and the exhaust fan 72 sends out air from the exhaust port 18 (see FIG. 11B) to the outside.

  Of the light (white light) from the arc tube 61a, the combined light of the light emitted directly from the opening of the reflector 61b and the light reflected from the inner wall surface (reflection surface) of the reflector 61b and emitted from the opening is obtained. The light emitted from the light source lamp 61 of the light source device 60. The light emitted from the light source lamp 61 is incident on the color wheel 111 (see FIG. 5) of the illumination optical system unit 110.

  FIG. 4 is a perspective view of the optical engine 100 extracted. In FIG. 4, the optical engine 100 includes an illumination optical system unit 110, an image display element unit (image forming unit) 120, and a projection optical system unit 130. The illumination optical system unit 110 splits white light from the light source lamp 61 into RGB (three primary colors of light) and guides it to the image display element unit 120. The image display element unit 120 modulates light from the illumination optical system unit 110 in accordance with an image signal from an external device to generate an image. The projection optical system unit 130 enlarges and projects the generated image.

  FIG. 5 is a diagram for explaining the structure and optical path of the illumination optical system unit 110. In FIG. 5, the illumination optical system unit 110 includes a color wheel 111, a light tunnel 112, a relay lens 113, a cylinder mirror 114, a concave mirror 115, and an OFF light plate 116 (see FIG. 7). The color wheel 111 converts the white light from the light source lamp 61 into light that repeats each color of RGB every unit time by a disk-shaped color filter and emits the light. The light tunnel 112 is formed in a cylindrical shape by laminating plate glasses, and guides light from the color wheel 111. The relay lens 113 is composed of a combination of two lenses, and collects light while correcting axial chromatic aberration of light from the light tunnel 112. The cylinder mirror 114 reflects light that has passed through the relay lens 113. The concave mirror 115 reflects the light reflected by the cylinder mirror 114 toward the DMD element 121 of the image display element unit 120.

  FIG. 6 is a perspective view for explaining the image display element unit 120. 5 and 6, the image display element unit 120 includes a DMD printed circuit board 122, a heat sink 123, and a fixing plate 124 in addition to the DMD element 121.

  The DMD element 121 has a plurality of micromirrors, and reflects the light from the concave mirror 115 of the illumination optical system unit 110 by driving each micromirror in a time division manner so that an image (image light) based on image information is generated. To do. The DMD element 121 reflects light used for image generation toward the projection lens 131 of the projection optical system unit 130, and unnecessary light (light discarded) reflects toward the OFF light plate 116 (FIG. 7).

  A DMD element 121 is mounted on the DMD printed circuit board 122. The heat sink 123 cools the DMD element 121 and the DMD printed circuit board 122 as heat bodies. The fixing plate 124 presses the heat sink 123 against the DMD printed circuit board 122.

  FIG. 7 shows the projection lens 131 extracted from the illumination optical system unit 110, the image display element unit 120, and the projection optical system unit 130. The light used for image formation reflected from the DMD element 121 of the image display element unit 120 is reflected toward the projection lens 131, and the discarded light is reflected toward the OFF light plate 116 of the illumination optical system unit 110.

  FIG. 8 is a perspective view illustrating the projection optical system unit 130, and FIG. 9 is a side view when the projection optical system unit 130 projects onto the screen 2. 8 and 9, the projection optical system unit 130 includes a folding mirror 133 and a free-form curved mirror 134 in addition to the illumination housing 132 that holds the projection lens 131. The folding mirror 133 folds the optical path of the image light magnified by the projection lens 131. The free-form surface mirror 134 reflects the image light that has passed through the folding mirror 133 while enlarging it. In order to adopt such a configuration, the projection optical system unit 130 is an ultrashort focus optical system.

  By adopting the projection optical system unit 130 that is an ultrashort focal length optical system in the projector apparatus 1 of the present embodiment, the projector apparatus 1 can be disposed close to the screen 2 that is an object to project light. Can be designed as a compact vertical installation type.

  FIG. 9 is a side view of the projection optical system unit 130 and the optical path, and also shows the optical path to the projection surface. As can be seen from FIG. 9, since the optical system as described above is provided, the projection size on the screen 2 changes according to the distance D from the projector body 10 to the image projection surface of the screen 2. Specifically, for example, when the distance is D1, the vertical size of the projection size on the screen 2 is S1, when the distance is D2, the projection size is S2, and when the distance is D3, the projection size is S3. When is D4, the projection size is S4.

  Thus, in order to adjust the distance D when setting a desired projection size, in the present embodiment, as a projection size display unit, a method of adjusting using the handle 30 on which the scale of the actual projection size is written is used. explain.

<< Composition of the handle >>
Next, the configuration of the handle 30 will be described with reference to FIGS.

  In this embodiment, the handle 30 is rotatable and telescopic. Here, the length of the handle 30 is adjusted so as to correspond to the distance D (see FIG. 9) between the projector main body 10 and the image projection plane where the projected image has a predetermined size. The projected image can be set to a predetermined size by bringing the grip portion 33a at the tip of the handle 30 into contact with the image projection surface of the screen 2. This feature will be described in detail with reference to the following drawings.

  FIG. 10 is a perspective view of the projector apparatus 1 provided with the handle 30 according to the embodiment of the present invention. The handle 30 can be expanded and contracted in the direction B of FIG. The handle 30 includes a root portion 32 (first member) serving as a lower support arm, and a telescopic handle body 33 (second member) having a grip portion 33a and a support arm upper portion 33b.

  In the handle 30, the expansion / contraction handle main body 33 is an inner expansion / contraction part having an outer shape smaller than the root part 32, and the root part 32 has a rectangular cross section and functions as an outer sleeve that covers the expansion / contraction part. Therefore, by pulling out and storing the expansion / contraction handle main body 33 that is the inner expansion / contraction portion from the root portion 32, the support arms (32, 33b) of the handle 30 can be expanded and contracted.

  Further, the handle 30 can be rotated in the direction A in FIG. The base portion 32 of the handle 30 has a rotation shaft (rotation shaft) 36, and the rotation shaft 36 (see FIG. 15) is joined (axially attached) to both side surfaces of the rear cover 12 b of the projector body 10. Therefore, since the root portion 32 can be pivoted at a predetermined angle in the B direction about the rotation shaft 36, the handle 30 can be rotated.

  FIG. 11A is a side view of the projector device 1 showing a movable range of rotation of the handle 30. 11 (b) is a side view of the projector device viewed from another side.

  Referring to FIG. 11, the handle 30 has a rotation axis in a range of about 90 ° from a substantially horizontal position with the grip 33 a facing the image projection surface to a substantially vertical position with the grip 33 a facing the projector main body 10. It is possible to rotate around 36.

  A scale 31 is provided on the outer surface of the support arm upper portion 33 b of the extendable handle body 33 of the handle 30. This scale 31 is projected in inches (for example, 50, 60, etc.) so that an appropriate distance between the projector main body 10 and the screen 2 corresponding to the image projected on the screen 2 has a predetermined size. 70 inches).

  FIG. 12 is a side view of the installation state of the projector apparatus 1 during image projection (projecting light). As can be seen from FIG. 14, when the projector device 1 is in the installed state, the side of the tip of the grip portion 33 a of the handle 30 is brought into contact with the image projection surface of the screen 2. When the projector apparatus 1 is installed before use, in the present embodiment, first, the length of the support arms (32, 33b) of the handle 30 is adjusted using the scale 31. Thereafter, the projected image on the screen 2 can be set to a predetermined size by bringing the grip portion 33a at the tip of the handle 30 into contact with the image projection surface of the screen 2.

  In general, the closer the projector body 10 is to the screen 2, the smaller the projected image area is. However, since the projector body 10 projects an enlarged image, the distance between the screen 2 and the projector body 10 is small. The projected image size varies greatly depending on the difference. Therefore, it has been troublesome to adjust the image size to a predetermined size using the image projected by the projector main body 10 of the projector device 1.

  Therefore, in the present invention, as shown in FIGS. 12 to 14, the scale 31 determines the amount of expansion / contraction of both support arms (32, 33 b) of the handle 30, and projects the side of the tip of the grip portion 33 a of the handle 30. By bringing it into contact with the surface, it becomes possible to match the projection image size to a predetermined size.

  FIG. 13 is a view of the projector device 1 of FIG. 12 as viewed from above. Here, when the projector main body 10 is installed in front of the screen 2, if the left and right directions of the image projection surfaces of the projector main body 10 and the screen 2 are not parallel, the lengths of the left and right sides of the projected image are different. There was a risk that the image would be trapezoidal.

  Therefore, first, when adjusting to the scale of the support arm (32, 33b) of the handle 30, the tip of the grip portion 33a can be made parallel to the projector body 10 by setting the same scale on the left and right.

  As shown in FIG. 13, by bringing the grip portion 33 a of the handle 30 into contact with the screen 2, it is possible to keep the image projection surface of the screen 2 parallel to the projector main body 10. When installing the projector device 1, the handle 30 is directed to a substantially horizontal position with the grip portion 33 a facing the image projection plane side, and the support arm upper portion 33 b at the tip is moved so that the scales of the support arms (32, 33 b) are scaled. By setting the left and right the same, the tip of the grip portion 32a and the projector main body 10 can be made parallel. Then, by bringing the grip portion 33 a of the handle 30 into contact with the screen 2, it is possible to keep the image projection surface of the screen 2 and the projector body 10 in parallel.

  In this way, by bringing the handle 30 into contact with the image projection surface, the distance between the image projection device (projector device) and the projection surface can be measured and set to an appropriate size. By arranging, an image without distortion can be projected.

  Here, when extending and contracting both the support arms (32, 33b), a rectangular rod-shaped support arm upper portion 33b is pulled out from the support arm lower portion (root portion) 32 which is a straight outer side, so that there is no difference between right and left in principle. .

  However, the scale of the two support arms (32, 33b) on both sides is slightly shifted when the support arm upper part 33b is pulled out smoothly, when the user forcibly pulls it, or when it is set quickly. There was a risk of a difference between the left and right.

(Modification of scale)
Therefore, as a modified example constituting the scale, as shown in FIG. 14, the depression 33D is provided at the same position as the scale on the support arm upper portion (33b), and the protrusion 32P is provided at the root portion 32 so as to be fitted. It is also possible to make a configuration in which For example, FIG. 14 is a side cross-sectional view of the handle support arms (32-1, 33b-1) in the installed state shown in FIG.

  In FIG. 14, the support arm upper portion 33b-1 is provided with a depression 33D at a position corresponding to, for example, every 10 inches of the projection size, and the support arm lower portion (root portion 32-1) is provided with a flexible protrusion 32P at the end. It has been. By engaging the protrusion 32P and the recess 33D, the expansion and contraction can be stopped at the right position on the right and left sides.

  In addition, even in the handle 30-A having the configuration shown in FIG. 14, it is possible to stop the portion where the recessed portion 32D and the protrusion 33P are not properly fitted, that is, the portion not exactly aligned with the scale.

  FIG. 15 is an enlarged view of the rotating portion of the handle 30 of the first embodiment. As described above, the handle 30 can be rotated about the rotation shaft 36, and the support arms (32, 33b) can be expanded and contracted.

  Referring to FIG. 15, a first opening 34 and a second opening 35 are provided in the root portion (first member) 32 and the extendable handle main body (second member) 33, respectively. FIG. 15 shows a state in which the extendable handle body 33 is pulled out from the root portion 32. Further, the first opening 34 and the second opening 35 are provided at positions where they can be overlapped by storing the one close to the base of the expansion / contraction handle main body 33 in the base 32 by the expansion / contraction operation of the handle 30. ing.

  A main body protrusion 11 is provided on a side surface of the rear cover 12 b of the housing 12 of the projector main body 10. On the side surface of the projector main body 10, the position of the main body protrusion 11 is provided at a position substantially vertically above the rotation shaft (center) 36.

  The first opening 34 is positioned so as to overlap with the main body protrusion 11 provided in the projector main body 10 when the handle 30 rotates about the rotation center at the base. More specifically, since the main body protrusion 11 of the projector main body 10 is provided at a position overlapping the first opening 34, the handle 30 is vertical unless the positions of the first opening 34 and the second opening 35 overlap. I can't become a position. On the other hand, when the position of the handle 30 is in the vertical position when it is transported, the first and second openings 34 and 35 of the handle 30 and the main body protrusion 11 overlap, so that the support arms 32 and 33b expand and contract. There is nothing.

(Modification of opening)
Here, in order to make it difficult for the main body protrusion 11 to come off during transportation, the openings 34-2 and 35-2 that engage with the main body protrusion 11 can be configured as shown in FIG. FIG. 16 is an enlarged cross-sectional view seen from the inside showing the engaged state of the handle 30-B and the main body protrusion 11. As shown in FIG.

  In the configuration of FIG. 16, in the opening 35-2 of the upper arm tip 33b-2 on the inner side, the small projection 35P has a lower portion when the handle 30-B is in the vertical position, and an inclination 35S is the upper portion at that time. It is provided to come to. In this configuration, first, the main body protrusion 11 is inserted into the openings 34-2 and 35-2 with the handle 30-B being vertical. At this time, the small protrusion (lower protrusion) 34P on the lower side of the second opening 35 of the support arm upper portion 33b-2 comes into contact with the main body protrusion 11, and the movement of the main body protrusion 11 is locked by the small protrusion 35P (FIG. 16). (Refer to (1)).

  Further, when the grip portion 33a of the handle 30-B is lifted, the support arm upper portion 33b-2 moves upward relative to the root portion 32-2, and the first opening 34-2 of the root portion 32-2. The lower end 34O protrudes from the second opening 35-2 of the support arm upper portion 33b-2. And the lower end 34O of the 1st opening part 34-2 of the base part 32-2 and the main body protrusion 11 contact, and this relative movement stops (refer FIG. 16, (2)).

  Therefore, when carrying, the main body protrusion 11 is placed on the small protrusion 35P on the lower side of the second opening 35-2 of the support arm upper portion 33b-2 and the lower end 34O of the first opening 34-2 of the root portion 32-2. Since they are in contact with each other and locked, the main body protrusion 11 does not come off from the openings 34-2 and 35-2 even if it swings during transportation. Further, since the second opening 35-2 of the support arm upper portion 33b-2 and the first opening 34-2 of the root portion 32-2 are both in contact with the main body protrusion 11, the support arm 32-2 is transported during transportation. 33b-2 does not expand and contract.

  With this structure, when the projector apparatus 1 is transported while grasping the handle 30 (30-B), the handle 30 being stretched and the engagement between the openings 34-2 and 35-2 and the main body protrusion 11 are released. Thus, the projector apparatus 1 can be transported stably.

  In the above description, the handle 30 is rotated to move from the vertical position to the horizontal position, but the handle may be detachable. In this case, when installing the projector apparatus 1, a handle is provided so that a mark at the time of measurement, an installation position of the handle 30 with respect to the projector body 10, etc. can be known so that a removable handle can correctly display the projection size. Alternatively, a mark or the like is appropriately written on the projector body.

  As described above, in the present embodiment, the distance between the image projection apparatus and the projection plane can be measured by making the handle of the image projection apparatus (projector apparatus) stretchable and bringing the handle into contact with the projection plane. it can.

  That is, in the present invention, by using a handle with a scale, the installation position of the image projection apparatus can be easily determined without increasing the size of the apparatus (machine).

<< Second Embodiment >>
FIG. 17 is a perspective view of the projector device according to the second embodiment of the present invention. In the present embodiment, the projector device 1 -A includes the telescopic bar 40 as a projection size display unit that displays the projection size on the projection surface of the screen 2. The extendable bar 40 is provided on the side surface of the projector main body 10 like the handle 30 described above, and is rotatable and extendable as shown in FIG.

  FIG. 18 is a side view of the installation state of projector apparatus 1-A during image projection. As can be seen from FIG. 18, in the installed state of the projector apparatus 1 -A, the tip of the telescopic bar 40 is brought into contact with the image projection surface of the screen 2. When installing the projector device 1 -A before use, in the present embodiment, first, the length of the telescopic rod 40 is adjusted using the scale 41. Thereafter, the projected image on the screen 2 can be set to a predetermined size by bringing the telescopic rods 40 arranged on both sides into contact with the image projection surface of the screen 2.

  As in the first embodiment, the telescopic rod 40 of the present embodiment pulls out or stores the first member (extensible telescopic handle main body) 43 from the second member (root portion) 42 in the horizontal direction. It can be expanded and contracted.

  Note that when the projector apparatus 1-A is installed, a horizontal maintenance pin 12P may be provided on the rear cover 12b of the projector body 10 so that the telescopic rod 40 can be kept horizontal.

  In the present embodiment, the configuration in which the first member 43 smoothly slides from the second member 42 in FIG. 18 has been described. However, as described in FIG. A recess may be provided, and a protrusion may be provided at the tip of the second member 42 to be fitted. In this case, the length of the telescopic rod 40 can be determined by fitting the protrusion and the depression, and the projector device 1-A can be installed at a position that more closely matches the desired projection size.

  In this embodiment, as shown in FIGS. 17 and 18, the scale 41 determines the amount of expansion / contraction of the telescopic rod 40, and makes the end of the telescopic rod 40 abut the image projection surface of the screen 2 to obtain a predetermined amount. It is possible to match the projected image size to the size. That is, the distance between the image projection apparatus 1-A and the projection surface can be measured.

  Therefore, in this embodiment, the installation position of the image projection apparatus (projector apparatus 1-A) can be easily determined without increasing the size of the apparatus by using a scaled extension rod separately from the apparatus main body. .

<< Third Embodiment >>
FIG. 19 is a perspective view of a projector apparatus 1-B according to the third embodiment of the present invention. In the present embodiment, the projector device 1 -B has a tape measure 50 as a projection size display unit that displays the projection size on the projection surface of the screen 2. The tape measure 50 can be expanded and contracted by pulling out the tape 53 as a measuring unit from the winding unit 52 and storing it.

  FIG. 20 is a side view of the installation state of the projector apparatus 1-B during image projection. As can be seen from FIG. 20, in the installed state of the projector apparatus 1 -B, the tip of the tape 53 of the tape measure 50 is brought into contact with the image projection surface of the screen 2. When the projector apparatus 1-B is installed before use, in the present embodiment, first, the scale 53 shown on the tape 53 and the projector body 10 are drawn while the tape 53 is pulled out from the winding unit 52 along the tape measure presser 12Q. The drawing length of the tape 53 is adjusted according to the reference point 12R on the tape measure holder 12Q provided on the rear cover 12b. Thereafter, the projected image on the screen 2 can be set to a predetermined projection size by bringing the adjusted tape 53 into contact with the image projection surface of the screen 2.

  In addition, although the tape 53 described as the tape measure 50 of this embodiment supposing the metal convex, it may be a cloth or a resin measure.

  As described above, in this embodiment, the scale 51 determines the amount of expansion / contraction of the tape 53 of the tape measure 50, gives the measure near the main body of the image projection apparatus (projector apparatus) 1-B to have elasticity, By contacting the projection surface, the distance between the image projection apparatus and the projection surface can be measured, and the image size can be adjusted to a predetermined size.

  That is, in the present invention, by using a tape measure with a scale, the installation position of the image projection apparatus can be easily determined without increasing the size of the apparatus.

  As mentioned above, although this invention has been demonstrated based on each embodiment, this invention is not limited to the requirements shown in the said embodiment. With respect to these points, the gist of the present invention can be changed without departing from the scope of the present invention, and can be appropriately determined according to the application form.

1, 1-A, 1-B Projector device (image projection device)
2 screen (image projection surface)
10 Projector body (image projection device body, device body)
11 Main body protrusion 12 Case 12P Horizontal maintenance pin 12Q Tape restraint 12R Scale reference line 30, 30-A, 30-B Handle 31 Scale 32, 32-1, 32-2 Root part (first member, lower support arm)
32P Protrusion 32P
33, 33-1 and 33-2 Telescopic handle body (second member)
33D Depression 33a Grip 33b Support arm upper part 34, 34-2 First opening 34O Lower end 35 of first opening 35-2 Second opening 35P Small protrusion (lower protrusion) of second opening
35S slope 36 rotation axis 40 telescopic rod 41 scale 42 first member (root part)
43 Second member (tip)
50 Tape measure 51 Scale 52 Winding part 53 Tape 60 Light source device 61 Light source lamp 100 Optical engine 110 Illumination optical system unit 120 Image display element unit 130 Projection optical system unit A Extending and contracting direction B Pulling direction C Projecting direction D Projector body Distance between image projection plane S Projection size X direction Y direction Z direction

JP 2008-033116 A

Claims (11)

An image projection apparatus main body for performing image projection on the image projection surface;
A projection size display unit detachable from the apparatus main body;
The projection size display unit can be expanded and contracted, and an actual projection size on the image projection plane is described as a scale along the expansion and contraction direction.   The image projection apparatus according to claim 1, wherein in the projection size display unit, an actual projection size can be read from the scale when a tip of the projection size display unit is brought into contact with the image projection plane. The projection size display part is a handle,
The handle is movable from a vertical position to a horizontal position;
The handle includes a support arm that is paired with a side surface in an image projection direction in which the apparatus main body projects an image on the image projection surface, and a grip portion that connects between the tips of the pair of support arms. Have
The image projection apparatus according to claim 1, wherein the scale is described on the support arm that can be expanded and contracted.   When the handle is in a horizontal position, the grip portion serving as a contact surface to the image projection surface is provided so as to be substantially orthogonal to the image projection direction. The image projection apparatus according to claim 3. The handle can be rotated from the vertical position to the horizontal position by rotating about a predetermined rotation axis,
The handle includes a first member that is pivotally joined to the apparatus main body and includes a base portion of the support arm, and a second member that includes the grip portion and an upper portion of the support arm,
5. The image projection apparatus according to claim 3, wherein the support arm can be expanded and contracted by pulling out and storing the second member from the first member. 6. The scale is described on the second member,
When the handle is in a horizontal position, a recess is provided at a position corresponding to the scale on the first member, a flexible protrusion is provided on the second member, and the recess and the protrusion are fitted when the image projection apparatus is installed. The image projection apparatus according to claim 5, wherein the image projection apparatus is combined. The first member has a first opening, the second member has a second opening, the device main body has a pair of main body protrusions on a side surface in the image projection direction,
The second member is housed in the first member to a predetermined position, and the first opening and the second opening are overlapped with the main body protrusion,
The image projection apparatus according to claim 5, wherein the handle does not expand and contract when the first opening, the second opening, and the main body protrusion are fitted to each other.   The said handle is the said vertical position of an image projection apparatus, and the said 1st opening part of the said handle, the said 2nd opening part, and the said main body protrusion fit together at the time of conveyance. Image projection device. A lower protrusion is provided in the second opening of the second member of the handle;
Immediately after fitting the main body protrusion with the first opening and the second opening overlapping, the movement of the main body protrusion is locked by the lower protrusion of the second opening,
9. The lower end of the first opening of the first member is further in contact with the main body protrusion to lock the movement of the main body protrusion when the handle is in the vertical position and transported. Image projection device.   The image projection apparatus according to claim 1, wherein the projection size display unit is a telescopic bar.   The image projection apparatus according to claim 1, wherein the projection size display unit is a tape measure.

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