JP7205730B2 - Projection device and expansion unit for projection device - Google Patents

Description

The present invention relates to a projection device and an extension unit for a projection device.

Conventionally, in a projection device that projects an image formed using a micromirror display element called a DMD (digital micromirror device) or a liquid crystal plate on a screen, an expansion unit is installed to enable expansion of functions. is proposed. For example, Japanese Patent Laid-Open No. 2002-200002 discloses a ceiling suspension device that fixes and holds a projector in a suspended state by fixing a projector-side bracket fixed to a projector (projection device) to a ceiling-side bracket fixed to the ceiling. ing. In this projector, the projector-side bracket is fixed by inserting fastening screws through four screw insertion holes.

Japanese Patent Application Laid-Open No. 2000-122180

However, in the fixing method of the projection device (projector) of Patent Document 1, there are cases where the alignment accuracy is not sufficient depending on the application of the extension unit. On the other hand, if the casing of the projection device is provided with a configuration for alignment other than the screw holes, the external appearance of the projection device may deteriorate when the projection device is used without using the extension unit.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a projection apparatus and an extension unit for the projection apparatus that have good appearance and expandability.

In the projection device of the present invention, either one of the first convex portion and the concave portion for aligning the attachment position of the extension unit for the projection device, and the outer circumference arranged around the outer circumference of the one of the first convex portion and the concave portion and a leg member detachably attached to the housing, wherein the first protrusion and the recess are located at positions corresponding to either one of the first protrusion and the recess. and a leg member having the other , wherein the outer peripheral rib has an inner inclined portion that slopes downward toward one of the first convex portion and the concave portion, and the leg member includes the inner side of the first convex portion and the concave portion. It is adhered to the bottom surface between either one of the first convex portion and the concave portion and the outer peripheral rib in a state of having a gap between it and the inclined portion .

An expansion unit for a projection device according to the present invention is an expansion unit for using the projection device by attaching it to the ceiling, and is a round hole that engages with the alignment protrusion provided on the casing of the projection device. and a long hole that engages with a second alignment projection provided on the housing, the second alignment projection provided in a direction perpendicular to the parallel axis when viewed from the alignment projection. , provided.

According to the present invention, it is possible to provide a projection apparatus and an extension unit for the projection apparatus that have good appearance and expandability.

It is the perspective view which looked at the upper surface side of the projection apparatus which concerns on embodiment of this invention from the front. It is the perspective view which looked at the lower surface side of the projection apparatus which concerns on embodiment of this invention from back. 3A is an enlarged cross-sectional view of the periphery of a leg member of the projection device according to the embodiment of the present invention, where (a) is a IIIa-IIIa cross-sectional view of the projection device of FIG. -IIIb sectional view. 1 is a schematic plan view showing the internal configuration of a projection device according to an embodiment of the present invention; FIG. 1 is a bottom view of a projection device according to an embodiment of the invention; FIG. 1A and 1B show a state in which an extension unit is attached to a projection device according to an embodiment of the present invention, FIG. 1A being a perspective view seen from the front, and FIG.

A mode for carrying out the present invention will be described below. As shown in FIGS. 1 and 2, the projection device 10 has six surfaces (a top surface 20a, a bottom surface 20b, a left side 20c, a right side 20d, a front surface 20e, and a rear surface 20f) in the shape of a substantially long rectangular box whose longitudinal direction is the horizontal direction. ) is provided. The projection device 10 has a projection aperture 11 on the front surface 20e side. The projection device 10 emits projection light L from a projection aperture 11 . In the following description, left and right in the projection device 10 indicate the left and right direction (the second direction D2 in FIG. 4) with respect to the projection direction from the projection aperture 11, shows the front-rear direction (first direction D1 in FIG. 4) with respect to the traveling direction of .

The housing 20 has an upper case 21 including a top surface 20a and a portion of the right side surface 20d, and a lower case 22 including a bottom surface 20b (bottom surface) and a portion of the right side surface 20d. The housing 20 has a front panel 23 on the front side, a rear panel 24 on the rear side, and a left panel 25 on the left side. The front panel 23 extends to the left front corner 20g of the housing 20, and the left front corner 20g is rounded. Further, the front panel 23 is provided with a projection opening 23a of the projection opening 11, an air intake 23b, and an air exhaust 23c.

The rear panel 24 extends to the left rear corner 20h, and the left rear corner 20h is rounded. The rear panel 24 is provided with two intake ports 24a. The left panel 25 is provided between the left front corner 20g and the left rear corner 20h where the front panel 23 and the rear panel 24 extend. The left panel 25 is provided with an intake port 25a and a connection port 25b for an image input/output connector or the like. The front panel 23 , the rear panel 24 , and the left panel 25 are each bent toward the inside of the housing 20 at their centers in the vertical direction.

Of the edges of the housing 20, edges 21a and 22a, which are connecting portions to the right side surface 20d of the upper case 21 and the lower case 22, are rounded with rounded corners. Edges of the housing 20 other than the edges 21a and 22a (for example, edges formed by the top surface 20a and the left side surface 20c) are substantially rectangular. A right side surface 20d of the lower case 22 is provided with a connection port 22b for a power plug. Further, an operation panel 21b is provided on the upper surface 20a of the upper case 21 so that the projector 10 can be set.

A tilt arm 30 and two installation portions 40 are provided on the lower surface 20 b of the lower case 22 . The tilt arm 30 has an elongated installation contact portion 31c aligned with the longitudinal direction of the housing 20 . The tilt arm 30 is rotated by two arms (a left arm portion 31a and a right arm portion 31b) such that the installation contact portion 31c located in front is opened, and the projection device 10 can be arbitrarily installed within a predetermined range. It can be projected at an angle (elevation). Further, a recessed grip portion 26 is provided on the lower surface 20 b of the lower case 22 at substantially the center of the front lower edge portion of the housing 20 . The grip portion 26 has a substantially elongated rectangular shape elongated in the longitudinal direction of the housing 20 . A portion of the grip portion 26 on the rear inner edge side is covered with the installation contact portion 31c of the tilt arm 30 when the tilt arm 30 is retracted as shown in FIG.

The housing 20 has installation portions 40 on the left and right rear sides of the tilt arm 30 . The installation portion 40 has a leg member 60 that is an elastic member and a support portion 50 that supports fixing of the leg member 60 . The leg member 60 can be detachably attached to the housing 20 at the support portion 50 .

Further, the housing 20 has a plurality of screw holes 20b1, which are fixing portions, on the lower surface 20b. The screw holes 20b1 of this embodiment are provided at two locations on the front side of the projection device 10 and one location on the rear side. The screw hole 20b1 on the rear side is arranged on the center side in the left-right direction of the two screw holes 20b1 on the front side.

The support portion 50 shown in the enlarged view of the B portion in FIG. 2 includes a substantially cylindrical positioning projection 51 (first positioning projection) that is a convex portion projecting substantially vertically downward (upward in FIG. 2) from the lower surface 20b of the housing 20 . and an outer peripheral rib 52 provided in an elongated rectangular ring shape around the outer periphery of the positioning protrusion 51 . The alignment protrusion 51 can be used to align the mounting position of the expansion unit 80, which will be described later. The outer peripheral rib 52 is provided lower than the height of the leg member 60 attached to the support portion 50 (the height from the lower surface 20b). The height of the outer peripheral ribs 52 is set to, for example, half or less of the height of the leg members 60 . The outer peripheral rib 52 includes a long first side portion 52a and a short second side portion 52b. As shown in FIGS. 3A and 3B, the bottom surface 53 between the alignment protrusion 51 and the outer peripheral rib 52 is lower than the lower surface 20b, which is the outer surface of the housing 20 outside the outer peripheral rib 52. provided (toward the inside of the housing 20).

The outer peripheral rib 52 has an inner sloped portion 521 that slopes downward toward the alignment protrusion 51 side. The inner inclined portion 521 is provided in the form of a flat surface on the first side portion 52a and the second side portion 52b. Further, the outer peripheral rib 52 has an upright wall 522 between the bottom surface 53 and the inner inclined portion 521 . The standing wall 522 is provided in a flat surface shape on the first side portion 52 a and the second side portion 52 b so as to be substantially perpendicular to the bottom surface 53 .

In addition, the outer peripheral rib 52 has an inner sloped portion 521 and an outer sloped portion 523 adjacent to each other with a top portion 524 interposed therebetween. The outer inclined portion 523 is inclined so as to become lower toward the lower surface 20 b on the side opposite to the alignment protrusion 51 . The outer inclined portion 523 is provided continuously from the lower surface 20b of the housing 20 in the form of a concave curved surface.

The entire outer shape of the leg member 60 is formed in a substantially semi-cylindrical shape (or a semicylindrical shape) with the axis centered in the front-rear direction (see also FIG. 2). The leg member 60 includes a long first edge 60a and a short second edge 60b. The leg member 60 has a curved surface portion 61 that is curved in the lateral direction of the housing 20 and an inclined portion 62 that is inclined as if both ends on the short side located in the front and rear are cut obliquely. The leg member 60 is formed in a substantially trapezoidal shape in which the short upper base side is arranged on the lower side (ground side) in the cross-sectional view of FIG. 3(b).

On the opposite side of the leg member 60 to the curved surface portion 61 (the side that abuts on the housing 20), an engaging portion 63, which is a convex portion protruding in the shape of a short square prism, is provided. The engaging portion 63 has a flat contact portion 631 . In addition, the leg member 60 has a concave portion 632 that is recessed in a circular shape on the substantially central side of the contact portion 631 . A side surface 633 of the engaging portion 63 is arranged substantially perpendicular to the contact portion 631 and is provided in a flat surface (see FIGS. 3A and 3B). The engaging portion 63 is formed to have a width (shorter in the front-rear direction and the left-right direction) than the space surrounded by the standing wall 522 . Therefore, when the engaging portion 63 is arranged on the bottom surface 53 , a gap is provided between the side surface 633 of the engaging portion 63 and the vertical wall 522 .

Also, the leg member 60 has an inclined portion 634 between the curved surface portion 61 and the side surface 633 . The inclined portion 634 is arranged so as to form an obtuse angle with respect to the side surface 633 and is provided in the shape of a flat surface.

A double-faced tape 64 having a circular opening 641 having substantially the same opening diameter as the recess 632 is attached to the contact portion 631 (see the enlarged view of part A in FIG. 2). The opening 641 and the recess 632 are arranged correspondingly (see FIG. 3A, etc.).

The leg member 60 is adhered and fixed to the bottom surface 53 of the support section 50 with the double-sided tape 64 provided on the contact section 631 in a state in which the positioning protrusion 51 is inserted through the opening 641 and the recess 632 . The leg member 60 is arranged on the support portion 50 with a gap G between the inclined portion 634 and the inner inclined portion 521 . When the leg member 60 is to be removed, a narrow tool such as a flat-blade screwdriver is inserted into the gap G to urge the leg member 60 upward from the bottom surface 53 with the top portion 524 as a fulcrum. 60 can be easily removed from support 50 .

The outer peripheral ribs 52 described above are provided lower than the height of the leg members 60 attached to the support portion 50 (the height from the lower surface 20b). Therefore, the area where the leg members 60 are hidden is relatively small, and a good appearance can be obtained. Also, when the projection device 10 is placed with the leg members 60 on the ground, the leg members 60 may receive a tensile force in the separation direction from the projection device 10 if an external force is applied in the front-rear or left-right direction. Since the alignment projection 51 and the recess 632 are engaged with each other, the leg member 60 of the present embodiment can resist tensile force from the support portion 50 in the peeling direction. Further, the side surface 633 and the inclined portion 634 of the leg member 60 are brought into contact with the upright wall 522 and the inner inclined portion 521 of the outer peripheral rib 52 to restrict the movement of the leg member 60 . Therefore, it is possible to prevent the leg member 60 from unintentionally slipping or falling off.

Here, an outline of the internal configuration of the projection device 10 will be described. FIG. 4 is a schematic plan view of the projection device 10 from above, with the upper case 21 omitted. The projection device 10 has a light source optical system 71 and a projection optical system 72 . The light source optical system 71 includes a light source side housing 710 and optical members accommodated in the light source side housing 710 . The light source optical system 71 emits blue, green, and red light sources in a time division manner, and guides image light formed by a DMD, which is a display element, to the projection optical system 72 side. Therefore, the optical members accommodated in the light source side housing 710 include light sources (laser diodes, LEDs, phosphors, etc.) that emit light of each color, lenses (concave lenses and convex lenses), mirrors (all-color reflection mirrors and dichroic mirrors). ), light guide members (glass rods, microlens arrays, diffusion plates, etc.) for adjusting the luminance distribution of light from the light source, and the like. The projection device 10 of the present embodiment is configured by a so-called DLP (Digital Light Processing) method.

The projection optical system 72 includes a projection-side housing 720 and a fixed lens and a movable lens accommodated in the projection-side housing 720 . The projection optical system 72 emits the image light guided from the light source optical system 71 side as the projection light L from the projection aperture 11 (see also FIG. 1). Zoom adjustment and focus adjustment can be performed by adjusting the movable lens of the projection optical system 72 . The projection light L emitted from the projection aperture 11 is projected onto a projection target such as a screen (not shown) or a wall surface.

The light source side housing 710 and the projection side housing 720 are relatively aligned and connected. A plurality of flange portions 711a to 711d are provided around the outer periphery of the light source side housing 710 on the lower case 22 side. A flange portion 711a positioned on the front side of the light source side housing 710 is provided with a round hole 712 as shown in the enlarged view of the D portion. Further, in the flange portion 711b located on the rear side of the light source side housing 710, as shown in the enlarged view of E section, a long hole 713 having a long axis in the front-rear direction (first direction D1) is provided.

In addition, the lower case 22 is provided with internal alignment projections 221 and 222 (see the enlarged view of part D and the enlarged view of part E). The internal alignment protrusions 221 and 222 protrude upward (toward the near side in FIG. 4) from the inner surface of the lower case 22 . The internal alignment protrusions 221, 222 are provided in the form of pillars having a cross-shaped cross section. The internal positioning protrusion 221 provided on the front surface 20e side of the housing 20 and the internal positioning protrusion 222 provided on the rear surface 20f side are arranged on the reference axis Q in the front-rear direction (first direction D1).

Further, the light source side housing 710 is fastened and fixed to the screw holes provided on the inner surface side of the lower case 22 by inserting the screw members 714 into screw holes (not shown) provided in each of the flange portions 711a to 711d. be. Therefore, the light source-side housing 710 is fixed in alignment with the lower case 22 . A projection-side housing 720 of the projection optical system 72 connected to the light-source-side housing 710 is also fixed to the lower case 22 via the light-source-side housing 710 while being aligned. The optical axis P of the projection light L guided by the projection-side housing 720 is set parallel to the imaginary line connecting the center of the round hole 712 and the center of the long hole 713 . Therefore, the projection optical system 72 is arranged such that the optical axis P is parallel to the reference axis Q in the first direction D1. In other words, a plurality of internal alignment protrusions 221 and 222 are provided along the first direction D1 parallel to the optical axis P in plan view of FIG. 4 or bottom view of FIG.

FIG. 5 is a bottom view of the projection device 10 viewed from the lower surface 20b side. In FIG. 5, illustration of the tilt arm 30 and the leg member 60 is omitted. A part of the alignment protrusions 51A (51) and another part of the alignment protrusions 51B (51) of the alignment protrusions 51 described above are located on the lower surface 20b of the housing 20 on different corners 20h and 20i and on the sides of the housing. 20 (rear surface 20f). The alignment protrusion 51A is located near the left rear corner 20h of the lower surface 20b and is on a parallel axis (in this embodiment, the optical axis P on the parallel axis positioned below the housing 20). Further, the alignment projection 51B (second alignment projection, second alignment portion) is arranged in the vicinity of the right rear corner portion 20i of the lower surface 20b and at a position different from the above-mentioned parallel axis to the optical axis P. be. The alignment protrusions 51A and the alignment protrusions 51B are arranged in a direction perpendicular to the optical axis P (second direction D2 perpendicular to the first direction D1). That is, the alignment protrusion 51B is provided on the normal line R of the second direction D2 that perpendicularly intersects the above-described parallel axis when viewed from the alignment protrusion 51A.

The projection device 10 shown in FIGS. 6A and 6B shows a state in which an extension unit 80 (extension unit for projection device) is attached to the bottom surface 20b side. The projection device 10 can be used by attaching the projection device 10 to a ceiling or the like using the extension unit 80 . The expansion unit 80 has a housing-side fixing member 81 , an intermediate member 82 , and a ceiling-side fixing member 83 .

The housing-side fixing member 81 is formed by bending various portions of a plate-like member, and has a flat connecting portion 811 connectable to the intermediate member 82 and a fixed portion 813 fixed to the housing 20 . . The connecting portion 811 has a hemispherical convex portion 811a connectable to the intermediate member 82 on the upper side in FIG. 6(a). The fixed portion 813 is connected from the outer peripheral edge of the connecting portion 811 via the leg portion 812, and includes three fixed portions 813a to 813c. The fixed portions 813a to 813c are arranged on the same plane.

The fixed portion 813a has an engaged portion 814a, which is an opening with which the alignment protrusion 51A can be engaged, and a screw hole 815 (details are not shown). The engaged portion 814a is provided as a round hole as shown in the enlarged view of the F portion. Moreover, the fixed portion 813a is provided in the shape of a long flat plate in the first direction D1. A lens mounting portion 816 extending in a substantially orthogonal direction is provided from the front end portion of the fixed portion 813a. Inside the lens mounting portion 816, a circular opening 816a is provided with the central axis aligned with the optical axis P. As shown in FIG.

The fixed portion 813b has an engaged portion 814b, which is an opening with which the alignment protrusion 51B can be engaged, and a screw hole 815. As shown in FIG. The engaged portion 814b is provided as a long hole elongated in the direction parallel to the first direction D1, as shown in the enlarged view of the F portion. A screw hole 815 is also provided in the fixed portion 813c.

The intermediate member 82 is formed in a cylindrical shape having a hollow in the vertical direction. A lower end portion of the intermediate member 82 is connected to the convex portion 811a so that the angle can be adjusted. A flange-like portion provided above the intermediate member 82 is connected to the ceiling-side fixing member 83 . The details of the connection structure between the intermediate member 82, the convex portion 811a and the ceiling-side fixing member 83 are omitted from the illustration.

The ceiling-side fixing member 83 is formed in a substantially equilateral triangular flat plate shape. The ceiling-side fixing member 83 is fixed to the intermediate member 82 . A mounting hole 831 is provided at each corner corresponding to the top of the triangle.

When using the extension unit 80, first, the alignment protrusion 51A provided on the lower surface 20b of the projection device 10 is engaged with the engaged portion 814a of the extension unit 80, and the alignment protrusion 51B is engaged with the engaged portion. 814b. The engagement of the engaged portion 814a determines the position of the expansion unit 80 with reference to the engaged portion 814a, and the engagement of the engaged portion 814b determines the angular position of the expansion unit 80 about the vertical axis. Further, at this time, the position of the screw hole 20b1 (see FIG. 5), which is the fixing portion provided in the lower surface 20b of the projection device 10, corresponds to the position of the screw hole 815 of the housing-side fixing member 81. Therefore, by fastening the screw member 84 inserted into the screw hole 815 of the housing-side fixing member 81 to the screw hole 20b1, the extension unit 80 is fixed to the projection device 10 in a highly accurate position. be able to.

The expansion unit 80 can be fixed by screwing to the ceiling of the room or the like through the mounting hole portion 831 . Therefore, the projection device 10 can be used while suspended by the extension unit 80 .

Also, a conversion lens (not shown) can be attached to the opening 816a of the lens attachment portion 816 shown in FIG. 6(a). Since the central axis of the opening 816a is aligned with the optical axis P of the projection light L, the optical axis of the conversion lens and the optical axis P of the projection light L can be easily aligned. Thereby, the projection light L emitted from the projection device 10 can be emitted at a wider angle.

As described above, in the projection apparatus 10 of the present embodiment, the extension unit 80 is connected to the units inside the projection apparatus 10 (the light source optical system 71 and It can be aligned with high accuracy with respect to the projection optical system 72). Furthermore, if the lower case 22 is formed with high accuracy by die-casting metal, it is possible to align 80 with respect to 71 and 72 with higher accuracy. In addition, when the projection device 10 is used without using the extension unit 80, the positioning projections 51 are covered with the leg members 60, so that the impact on the appearance of the projection device 10 can be reduced.

As described above, the present invention is not limited by the present embodiment, and can be implemented with various modifications. For example, as the extension unit 80 in this embodiment, a ceiling bracket provided with a lens mounting portion 816 to which a conversion lens can be attached has been described, but a unit having other functions may be used.

Further, in the present embodiment, the leg member 60 is adhesively fixed to the bottom surface of the support portion 50 by the double-sided tape 64, but instead of the double-sided tape 64, the leg member 60 is fixed by applying an adhesive. good too.

Also, the projection-side housing 720 of the projection optical system 72 of the present embodiment is indirectly aligned and fixed via the light source-side housing 710 of the light source optical system 71 by the internal alignment protrusions 221 and 222. However, the internal alignment protrusions 221 and 222 may be provided at appropriate positions on the inner surface of the lower case 22 to directly align and fix the projection-side housing 720 .

Further, in the present embodiment, an example in which the positioning portion on the housing 20 side is a convex portion functioning as the positioning protrusion 51 has been described, but the positioning portion may be either a convex portion or a concave portion. Therefore, although the configuration in which the leg member 60 has the recessed portion 632 has been described, the recessed portion 632 is not limited to the recessed portion 632. and recesses. When the positioning projection 51A, which is a convex portion, is used as the positioning portion on the housing 20 side, it can function as a core material of the leg member 60, and deformation such as compression and strain of the leg member 60 can be suppressed. can be done.

As described above, according to the embodiment of the present invention, the projection device 10 includes the housing 20 having either one of the convex portion and the concave portion for matching the mounting position of the extension unit 80 for the projection device, and the housing 20. A leg member 60 that is removably attached and has one of the protrusion and the recess at a position corresponding to one of the protrusion and the recess on the housing 20 side. When not used for mounting the expansion unit 80, etc., the leg member 60 can cover the alignment part of either the convex part or the concave part, so that the effect on the appearance can be reduced while maintaining expandability. can be done. In addition, the uneven engagement can prevent the leg member 60 from slipping or coming off.

In addition, the housing 20 has the outer peripheral ribs 52 around either one of the convex portion and the concave portion. 60 can be prevented from slipping or falling off.

In addition, the bottom surface 53 between one of the convex portion and the concave portion and the outer peripheral rib 52 is provided lower than the outer surface (lower surface 20 b ) of the housing 20 outside the outer peripheral rib 52 . Since the engaging depth of the engaging portion 63 can be increased while keeping the height of the outer peripheral rib 52 low, it is possible to prevent the leg member 60 from slipping or coming off while suppressing the influence on the appearance.

In addition, the projecting device 10 having the inner inclined portion 521 in which the outer peripheral rib 52 is inclined so as to be lower toward either one of the convex portion and the concave portion of the housing 20 is configured so that the top portion 524 of the outer peripheral rib 52 is kept low while the leg member 60 is mounted. It is possible to prevent displacement and falling off in the front, back, left and right directions.

In addition, the leg member 60 has a gap G between it and the inner inclined portion 521, and the projection device 10 adhered to the bottom surface 53 is inserted into the gap G with a flat-blade screwdriver or the like and used as a lever with the top portion 524 as a fulcrum. The leg member 60 can be easily removed from the support portion 50 according to the principle of .

In addition, in the projection device 10 in which the vertical wall 522 is provided between the bottom surface 53 and the inner inclined portion 521, even if the leg member 60 receives an external force in the front, rear, left, and right directions, the engaging portion 63 abuts and restricts the displacement. be able to.

In addition, the outer peripheral rib 52 is adjacent to the inner sloped portion 521, and has an outer sloped portion 523 that slopes downward to the side opposite to one of the convex portion and the concave portion. ) to the leg member 60 so that the leg member 60 is less likely to be caught, the leg member 60 can be prevented from coming off. Also, the appearance of the installation portion 40 can be improved.

Further, one of the convex portion and the concave portion on the side of the housing 20 is a convex portion functioning as the alignment protrusion 51A provided on a parallel axis that overlaps the optical axis P of the projection optical system 72 in a plan view, A configuration has been described in which the other of the convex portion and the concave portion on the leg member 60 side is a concave portion. Therefore, the reference position of the extension unit 80 is set on a parallel axis that overlaps with the optical axis P in a plan view, and the extension unit 80 can be attached with high accuracy in relation to the projection light L as well. Further, the positioning protrusion 51A, which is a convex portion, can function as a core material of the leg member 60, and deformation such as compression and distortion of the leg member 60 can be suppressed.

Further, the expansion unit 80 of the projection device 10 includes a round hole (814a) that engages with the alignment protrusion 51A provided on the housing 20 of the projection device 10 and a second alignment protrusion provided on the housing 20. a projection (51B) having an elongated hole (814b) that engages a second alignment projection (51B) provided in a direction perpendicular to the parallel axis when viewed from the alignment projection 51A. As a result, the extension unit 80 can be aligned with the projection device 10 with high accuracy, and various extended functions can be added to the projection device 10 .

It should be noted that the embodiments described above are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and its equivalents.

Below, the invention described in the first claim of the present application is added.
[1] A housing having either a convex portion or a concave portion for aligning the mounting position of the extension unit for a projection device;
a leg member detachably attached to the housing, the leg member having one of the convex portion and the concave portion at a position corresponding to one of the convex portion and the concave portion;
A projection device comprising:
[2] The projection device according to [1], wherein the housing has outer peripheral ribs around the outer periphery of either one of the convex portion and the concave portion.
[3] The projection device according to [2], wherein a bottom surface between one of the convex portion and the concave portion and the outer peripheral rib is provided lower than the outer surface of the housing outside the outer peripheral rib.
[4] The projection device according to [3], wherein the outer peripheral rib has an inner sloped portion that slopes downward toward either one of the convex portion and the concave portion.
[5] The projection device according to [4], wherein the leg member is adhered to the bottom surface with a gap between the leg member and the inner inclined portion.
[6] The projection device according to [4] or [5], wherein a vertical wall is provided between the bottom surface and the inner inclined portion.
[7] The outer peripheral rib has an outer sloped portion that is adjacent to the inner sloped portion and slopes downward to the side opposite to one of the convex portion and the concave portion. ].
[8] Either one of the convex portion and the concave portion is a convex portion functioning as an alignment protrusion provided on an axis parallel to the optical axis of the projection optical system in a plan view,
The other of the convex portion and the concave portion is a concave portion,
The projection device according to any one of [1] to [7].
[9] A round hole that engages with the positioning projection provided on the housing of the projection device according to [8], and a second positioning projection provided on the housing, an elongated hole for engaging with a second alignment projection provided in a direction perpendicular to the parallel axis when viewed from the alignment projection.

10 projection device 11 projection port 20 housing 20a upper surface 20b lower surface 20b1 screw hole 20c left side surface 20d right side surface 20e front surface 20f rear surface 20g left front corner 20h left rear corner 20i right rear corner 21 upper case 21a edge 21b operation panel 22 Lower case 22a Edge 22b Connection port 23 Front panel 23a Projection port opening 23b Air inlet 23c Air outlet 24 Rear panel 24a Air inlet 25 Left panel 25a Air inlet 25b Connection port 26 Grip 30 Tilt arm 31a Left arm 31b Right Arm portion 31c Installation contact portion 40 Installation portion 50 Support portion 51 (51A, 51B) Alignment protrusion 52 Peripheral rib 52a First side portion 52b Second side portion 53 Bottom surface 60 Leg member 60a First edge portion 60b Second edge portion 61 Curved surface portion 62 Inclined portion 63 Engagement portion 64 Double-sided tape 71 Light source optical system 72 Projection optical system 80 Expansion unit 81 Housing-side fixing member 82 Intermediate member 83 Ceiling-side fixing member 84 Screw member 221 Internal alignment protrusion 222 Internal alignment protrusion 521 inner inclined portion 522 vertical wall 523 outer inclined portion 524 top portion 631 abutment portion 632 recessed portion 633 side surface 634 inclined portion 641 opening portion 710 light source side casings 711a to 711d flange portion 712 round hole 713 long hole 714 screw member 720 projection side casing 811 connecting portion 811a convex portion 812 leg portion 813 (813a to 813c) fixed portion 814a, 814b engaged portion 815 screw hole 816 lens mounting portion 816a opening 831 mounting hole portion D1 first direction D2 second direction G gap L projection light P optical axis Q reference axis R normal

Claims (14)

A housing having either one of a first convex portion and a concave portion for aligning a mounting position of an expansion unit for a projection device , and an outer peripheral rib arranged around an outer circumference of either one of the first convex portion and the concave portion. When,
a leg member detachably attached to the housing, the leg member having the other of the first protrusion and the recess at a position corresponding to one of the first protrusion and the recess;
with
The outer peripheral rib has an inner inclined portion that is inclined so as to be lower toward either one of the first convex portion and the concave portion,
The projection device according to claim 1, wherein the leg member is adhered to the bottom surface between either one of the first convex portion or the concave portion and the outer circumferential rib with a gap between the leg member and the inner inclined portion . 2. The projection device according to claim 1 , wherein the leg member further has an inclined portion arranged with a gap from the inner inclined portion . 3. The projection device according to claim 2, wherein the bottom surface between one of the first convex portion and the concave portion and the outer peripheral rib is provided lower than the outer surface of the housing outside the outer peripheral rib. 4. The projection device according to claim 3 , wherein an upright wall is provided between the bottom surface and the inner inclined portion. The leg member further has a side surface arranged with a gap between the standing wall,
5. The projection device according to claim 4 , wherein the inclined portion is arranged at an obtuse angle with respect to the side surface. The leg member further has a curved portion,
6. The projection device according to claim 5 , wherein the inclined portion is arranged between the curved surface portion and the side surface . The outer peripheral rib includes an outer sloped portion adjacent to the inner sloped portion and sloped downward to a side opposite to one of the first convex portion and the recessed portion, and the inner sloped portion and the outer sloped portion. 7. A projection device as claimed in any one of claims 4 to 6, comprising a top connected to the . 8. The projection apparatus according to claim 1, wherein said leg member is an elastic member. Either one of the first convex portion and the concave portion is a first convex portion functioning as an alignment protrusion provided on a parallel axis that overlaps the optical axis of the projection optical system in a plan view,
The other of the first convex portion and the concave portion is a concave portion,
9. A projection device according to any one of claims 1 to 8. An extension unit for ceiling-mounted use of a projection device, comprising:
10. A round hole for engaging with the alignment protrusion provided on the housing of the projection device according to claim 9, and a second alignment protrusion provided on the housing, wherein the alignment protrusion an extension unit for a projection device, comprising a slot for engaging with a second alignment projection provided in a direction perpendicular to said parallel axis when viewed from above. a housing-side fixing member having the round hole and the long hole;
an intermediate member connected to the housing-side fixing member so that the angle can be adjusted;
11. The expansion unit of the projection device according to claim 10, further comprising a ceiling-side fixing member connected to the intermediate member. The housing-side fixing member has a hemispherical second projection connectable to the intermediate member,
12. The projection device according to claim 11, wherein the intermediate member is formed in a cylindrical shape having a hollow portion in the vertical direction, and the lower end portion of the intermediate member is connected to the second convex portion so as to be able to adjust the angle. expansion unit for The housing-side fixing member is
a fixed portion having the round hole and the long hole;
A lens mounting portion extending in a substantially orthogonal direction from the front end portion of the fixed portion,
13. The extension unit of the projection device according to claim 11, wherein the lens mounting portion has an opening in which the optical axis of the projection device and the central axis are aligned. 14. The expansion unit according to any one of claims 11 to 13, wherein the ceiling side fixing member is formed in a substantially triangular flat plate shape.

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