JP2022089482A - Projection device and expansion unit for the same - Google Patents

Abstract

To provide a projection device which allows an expansion unit to be accurately attached thereto, and an expansion unit for the same.SOLUTION: A projection device 10 is provided, comprising a housing 20 with a projection optical system 72 for outputting projection light L. The housing 20 has a first alignment part (51A) for aligning the mounting position of an expansion unit for the projection device provided on a parallel axis that overlaps with an optical axis P of the projection optical system 72 in planar view.SELECTED DRAWING: Figure 5

Description

The present invention relates to a projection device and an expansion unit of the projection device.

Conventionally, in a projection device that projects an image formed by using a micromirror display element called DMD (Digital Micromirror Device) or a liquid crystal plate on a screen, an expansion unit can be attached to enable expansion of functions. Has been proposed. For example, Patent Document 1 discloses a ceiling-suspending device that holds a projector in a ceiling-suspended state by fixing a projector-side bracket fixed to a projector (projection device) to a ceiling-side bracket fixed to the ceiling side. ing. In this projector, the bracket on the projector side is fixed by inserting fastening screws into four screw insertion holes.

Japanese Unexamined Patent Publication No. 2000-122180

However, in the method of fixing the projection device (projector) of Patent Document 1, the alignment accuracy may not be sufficient depending on the use of the expansion unit.

It is an object of the present invention to provide a projection device to which an expansion unit can be attached with high positional accuracy and an expansion unit of the projection device.

The projection device of the present invention includes a housing having a projection optical system that emits projected light, and the housing is an expansion unit for a projection device on a parallel axis that overlaps with the optical axis of the projection optical system in a plan view. It has a first alignment part for aligning the mounting position.

The expansion unit of the projection device of the present invention includes a round hole that engages with the first alignment portion of the projection device, and an elongated hole that engages with the second alignment portion.

According to the present invention, it is possible to provide a projection device to which an expansion unit can be attached with high positional accuracy and an expansion unit of the projection device.

It is a 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 a perspective view which looked at the lower surface side of the projection apparatus which concerns on embodiment of this invention from the rear. It is an enlarged sectional view around the leg member of the projection apparatus which concerns on embodiment of this invention, (a) is the sectional view of IIIa-IIIa of the projection apparatus of FIG. 2, and (b) is IIIb of the projection apparatus of FIG. -IIIb is a cross-sectional view. It is a plane schematic diagram which shows the internal structure of the projection apparatus which concerns on embodiment of this invention. It is a bottom view of the projection apparatus which concerns on embodiment of this invention. A state in which the expansion unit is attached to the projection device according to the embodiment of the present invention is shown, (a) is a perspective view seen from the front, and (b) is a perspective view seen from the rear.

Hereinafter, embodiments for carrying out the present invention will be described. As shown in FIGS. 1 and 2, the projection device 10 has six surfaces (upper surface 20a, lower surface 20b, left side surface 20c, right side surface 20d, front surface 20e, rear surface 20f) in a substantially long rectangular box shape with the left-right direction as the longitudinal direction. ) The housing 20 is provided. The projection device 10 has a projection port 11 on the front surface 20e side. The projection device 10 emits the projected light L from the projection port 11. In the following description, the left and right in the projection device 10 indicate the left and right direction (second direction D2 in FIG. 4) with respect to the projection direction from the projection port 11, and the front and back are the projected light L of the projection device 10. The front-back direction (first direction D1 in FIG. 4) with respect to the traveling direction of is shown.

The housing 20 has an upper case 21 including a part of the upper surface 20a and a right side surface 20d, and a lower case 22 including a lower surface 20b (bottom surface) and a part 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 portion 20 g of the housing 20, and the left front corner portion 20 g has an R-shaped corner. Further, the front panel 23 is provided with a projection port opening 23a, an intake port 23b, and an exhaust port 23c of the projection port 11.

The rear panel 24 extends to the left posterior horn portion 20h, and the left posterior horn portion 20h has an R-shaped angle. The rear panel 24 is provided with two intake ports 24a. The left panel 25 is provided between the left front corner portion 20g and the left rear corner portion 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 such as a connector for image input / output. The center of the front panel 23, the rear panel 24, and the left panel 25 in the vertical direction is bent toward the inside of the housing 20.

Of the edges of the housing 20, the edges 21a and 22a, which are the connecting portions with the right side surface 20d of the upper case 21 and the lower case 22, are curved surfaces having an R-shaped angle. The edges of the housing 20 other than the edges 21a and 22a (for example, the edges formed by the upper surface 20a and the left side surface 20c) are substantially right-angled. A power plug connection port 22b is provided on the right side surface 20d of the lower case 22. Further, an operation panel 21b capable of setting the projection device 10 and the like is provided on the upper surface 20a of the upper case 21.

A tilt arm 30 and two installation portions 40 are provided on the lower surface 20b of the lower case 22. The tilt arm 30 has a long installation contact portion 31c aligned with the long direction of the housing 20. The tilt arm 30 is rotated by two arms (left arm portion 31a and right arm portion 31b) so that the installation contact portion 31c side located in front is opened, and the projection device 10 is arbitrarily installed in a predetermined range. It can be projected at an angle (elevation angle). Further, a concave grip portion 26 is provided at a substantially central portion of the front lower edge portion of the housing 20 on the lower surface 20b of the lower case 22. The grip portion 26 has a substantially long rectangular shape that is long in the long direction of the housing 20. A part of the rear inner edge side of the grip portion 26 is covered by the installation contact portion 31c of the tilt arm 30 when the tilt arm 30 shown in FIG. 2 is stored.

The housing 20 has installation portions 40 on each of the left and right sides on the rear side of the tilt arm 30. The installation portion 40 has a leg member 60 which is an elastic member and a support portion 50 which supports the 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 fixing portions, screw holes 20b1, on the lower surface 20b. The screw holes 20b1 of the present embodiment are provided at two locations on the front side and one location on the rear side of the projection device 10. The screw holes 20b1 on the rear side are 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 portion B in FIG. 2 is a substantially cylindrical alignment projection 51 (first alignment) which is a convex portion protruding substantially vertically downward (upper in FIG. 2) from the lower surface 20b of the housing 20. It has a protrusion (first alignment portion) and an outer peripheral rib 52 provided in an elongated annular shape around the outer circumference of the alignment 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 (height from the lower surface 20b) of the leg member 60 attached to the support portion 50. The height of the outer peripheral rib 52 is set to, for example, half or less of the height of the leg member 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 on the outside of the outer peripheral rib 52. It is provided (inward of the housing 20).

The outer peripheral rib 52 has an inner inclined portion 521 that is inclined so as to become lower as it approaches the alignment projection 51 side. The inner inclined portion 521 is provided in a flat surface shape on the first side portion 52a and the second side portion 52b. Further, the outer peripheral rib 52 has a vertical wall 522 between the bottom surface 53 and the inner inclined portion 521. The vertical wall 522 is provided on a flat surface in the first side portion 52a and the second side portion 52b so as to be substantially perpendicular to the bottom surface 53.

Further, the outer peripheral rib 52 has an outer inclined portion 523 arranged adjacently via the inner inclined portion 521 and the apex 524. The outer inclined portion 523 is inclined so as to become lower toward the lower surface 20b side opposite to the alignment protrusion 51. The outer inclined portion 523 is continuously provided from the lower surface 20b of the housing 20 in a concave curved surface shape.

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

An engaging portion 63, which is a convex portion protruding into a short square columnar shape, is provided on the side of the leg member 60 opposite to the curved surface portion 61 (the side that abuts on the housing 20). The engaging portion 63 has a flat surface-shaped contact portion 631. Further, the leg member 60 has a concave portion 632 recessed in a circular shape on the substantially central side of the contact portion 631. The side surface 633 of the engaging portion 63 is arranged so as to be substantially perpendicular to the contact portion 631 and is provided in a flat surface shape (see FIGS. 3A and 3B). The engaging portion 63 is formed to have a shorter width (shorter in the front-rear direction and the left-right direction) than the space surrounded by the vertical 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.

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

A double-sided tape 64 having a circular opening 641 having substantially the same opening diameter as the recess 632 is attached to the abutting portion 631 (see the enlarged view of the A portion in FIG. 2). The opening 641 and the recess 632 are arranged so as to correspond to each other (see FIG. 3A and the like).

The leg member 60 is adhesively fixed to the bottom surface 53 of the support portion 50 by the double-sided tape 64 provided in the contact portion 631 in a state where the alignment protrusion 51 is inserted through the opening 641 and the recess 632. The leg member 60 is arranged in the support portion 50 with a gap G between the inclined portion 634 and the inner inclined portion 521. When removing the leg member 60, a narrow tool such as a flat-blade screwdriver is inserted into this gap G, and the leg member 60 is urged to be lifted from the bottom surface 53 by the principle of leverage with the top 524 as a fulcrum. The 60 can be easily removed from the support 50.

The outer peripheral rib 52 described above is provided lower than the height (height from the lower surface 20b) of the leg member 60 attached to the support portion 50. Therefore, the area where the leg member 60 is hidden is relatively small, and a good appearance can be obtained. Further, when the leg member 60 is grounded and the projection device 10 is placed, if an external force is applied in the front-back or left-right direction, the leg member 60 may receive a tensile force in the direction of peeling from the projection device 10. Since the leg member 60 of the present embodiment has the alignment protrusion 51 and the recess 632 engaged with each other, it can resist the tensile force in the peeling direction from the support portion 50. Further, the side surface 633 and the inclined portion 634 of the leg member 60 can be brought into contact with the vertical 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 being unintentionally displaced or dropped.

Here, the internal configuration of the projection device 10 will be outlined. FIG. 4 is a schematic plan view of the projection device 10 as viewed from above, omitting the upper case 21. The projection device 10 includes 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 an optical member housed in the light source side housing 710. The light source optical system 71 emits blue, green, and red light sources in a time-divided manner, and guides the image light formed by the DMD, which is a display element, to the projection optical system 72 side. Therefore, as the optical member housed in the light source side housing 710, a light source (laser diode, LED, phosphor, etc.), a lens (concave lens or convex lens), and a mirror (all-color reflection mirror or dichroic mirror) that emit light from each color are used. ), A light guide member (glass rod, microlens array, diffuser, etc.) that adjusts the brightness distribution of the light source light is included. 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 housed 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 port 11 (see also FIG. 1). By adjusting the movable lens of the projection optical system 72, zoom adjustment and focus adjustment can be performed. The projected light L emitted from the projection port 11 is projected onto a projected object such as a screen or a wall surface (not shown).

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

Further, the lower case 22 is provided with internal alignment protrusions 221 and 222 (see the enlarged view of the D portion and the enlarged view of the E portion). The internal alignment protrusions 221 and 222 project upward (toward the front side in FIG. 4) from the inner surface of the lower case 22. The internal alignment protrusions 221 and 222 have a cross-shaped cross section and are provided in a columnar shape. The internal alignment protrusion 221 provided on the front surface 20e side of the housing 20 and the internal alignment projection 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 member 714 into the screw holes (not shown) provided in the flange portions 711a to 711d. To. Therefore, the light source side housing 710 is fixed in a state of being aligned with the lower case 22. The projection side housing 720 of the projection optical system 72 connected to the light source side housing 710 is also fixed in a aligned state with respect to the lower case 22 via the light source side housing 710. The optical axis P of the projected light L guided by the projection side housing 720 is set parallel to the virtual line connecting the center of the round hole 712 and the center of the elongated hole 713. Therefore, the projection optical system 72 is arranged so 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 the plan view of FIG. 4 or the bottom view of FIG.

FIG. 5 is a bottom view seen from the lower surface 20b side of the projection device 10. In FIG. 5, the tilt arm 30 and the leg member 60 are not shown. Of the above-mentioned alignment protrusions 51, some of the alignment protrusions 51A (51) and some other alignment protrusions 51B (51) are on different corner portions 20h, 20i and the housing on the lower surface 20b of the housing 20. It is provided on the rear side (rear surface 20f) side of 20. The alignment protrusion 51A is located near the left rear corner portion 20h of the lower surface 20b and is on a parallel axis overlapping the optical axis P of the projection optical system 72 seen from the lower surface 20b side in a plan view (in the present embodiment, the optical axis P). It is arranged on a parallel axis located on the lower side of the housing 20). Further, the alignment projection 51B (second alignment projection, second alignment portion) is arranged near the right rear corner portion 20i of the lower surface 20b and at a position different from the above-mentioned parallel axis of the optical axis P. To. The alignment protrusion 51A and the alignment protrusion 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 projection 51B is provided on the normal line R of the second direction D2 that intersects the parallel axis perpendicularly with respect to the alignment projection 51A.

The projection device 10 shown in FIGS. 6A and 6B shows a state in which the expansion unit 80 (expansion unit for the projection device) is attached to the lower surface 20b side. The projection device 10 can be used by attaching the projection device 10 to the ceiling or the like by the expansion 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 has a flat plate-shaped connecting portion 811 that is formed by bending various parts of the plate-shaped member and can be connected to the intermediate member 82, and a fixed portion 813 that is 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 of FIG. 6A. 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 into 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. Further, the fixed portion 813a is provided in a long flat plate shape 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, an opening portion 816a having a circular opening with the optical axis P and the central axis aligned with each other is provided.

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

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

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 expansion unit 80, first, the alignment projection 51A provided on the lower surface 20b of the projection device 10 is engaged with the engaged portion 814a of the expansion unit 80, and the alignment projection 51B is engaged with the engaged portion. Engage with 814b. The position of the expansion unit 80 is determined with reference to the engaged portion 814a by the engagement of the engaged portion 814a, and the angular position of the expansion unit 80 around the axis in the vertical direction is determined by the engagement of the engaged portion 814b. At this time, the position of the screw hole 20b1 (see FIG. 5), which is a fixing portion provided on 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 expansion unit 80 is fixed in a state of being highly accurately aligned with the projection device 10. be able to.

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

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

As described above, in the projection device 10 of the present embodiment, the expansion unit 80 is divided into the internal unit (light source optical system 71 and the light source optical system 71 and) of the projection device 10 by the 221,222 and 51A and 51B provided in the lower case 22 which are the same members. It can be aligned with high accuracy with respect to the projection optical system 72). Further, if the lower case 22 is formed with high accuracy by die casting of metal, 80 can be aligned with respect to 71 and 72 with higher accuracy. Further, when the projection device 10 is used without using the expansion unit 80, the alignment projection 51 is covered with the leg member 60, so that the influence on the appearance of the projection device 10 can be reduced.

As described above, the present invention is not limited to the present embodiment, and can be implemented with various modifications. For example, as the expansion unit 80 in the present embodiment, the ceiling suspension bracket provided with the lens mounting portion 816 to which the conversion lens can be mounted has been described, but the unit may have other functions.

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

Further, the configuration in which 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 will be described. 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, the example in which the alignment portion on the housing 20 side is a convex portion that functions as the alignment protrusion 51 has been described, but the alignment portion may be either a convex portion or a concave portion. Therefore, although the configuration in which the leg member 60 has the concave portion 632 has been described, the leg member 60 is not limited to the concave portion 632, and the convex portion provided at a position corresponding to either the convex portion or the concave portion of the alignment portion on the housing 20 side. And can be configured to have either one of the recesses. When the alignment portion on the housing 20 side is a convex alignment protrusion 51A, it can function as a core material of the leg member 60 and suppress deformation such as compression and strain of the leg member 60. Can be done.

As described above, according to the embodiment of the present invention, the projection device 10 includes a housing 20 having a projection optical system 72 that emits projected light L, and the housing 20 is viewed in plan with the optical axis P of the projection optical system 72. A first alignment portion (51A) for aligning the mounting position of the expansion unit (80) for the projection device is provided on the overlapping parallel axes. As a result, the reference position of the expansion unit 80 can be provided on a parallel axis that overlaps with the optical axis P in a plan view, and the expansion unit 80 can be attached with high position accuracy even in relation to the projected light L.

Further, the projection device 10 in which the housing 20 has the internal alignment protrusions 221,222 and the projection optical system 72 is aligned and fixed by the internal alignment projections 221,222 is provided with the alignment projection 51A. The position of the optical axis P and the position of the expansion unit 80 can be set based on the reference axis Q of the housing 20 which is an integrated member. Therefore, the optical axis P and the expansion unit 80 can be aligned with high accuracy.

Further, the projection devices 10 provided with a plurality of internal alignment projections 221 and 222 along the first direction D1 parallel to the optical axis P in a plan view have an optical axis with reference to the internal alignment projections 221 and 222. The P and the expansion unit 80 can be aligned with high accuracy.

Further, the housing 20 has a second alignment portion (51B) for aligning the mounting position of the expansion unit for the projection device, and the second alignment portion (51B) is parallel to the first alignment portion (51A). The configuration provided on the normal line R of the second direction D2 intersecting the axis perpendicularly has been described. As a result, the expansion unit 80 can be accurately aligned in the rotation direction in the planes of the first direction D1 and the second direction D2.

Further, the first alignment portion (51A) and the second alignment portion (51B) are located on different corner portions 20h and 20i on the bottom surface (lower surface 20b) of the housing 20 and on the rear side (rear surface 20f side) of the housing 20. The provided projection device 10 can arrange the position of a part of the alignment projection 51A on the optical axis P while arranging the leg member 60 at a position where the projection device 10 can be stably placed. ..

Further, the leg member 60 detachably attached to the housing 20 has a concave portion at a position corresponding to a convex portion that functions as a first alignment portion (51A) or a second alignment portion (51B). When the projection device 10 including the leg member 60 is not used for mounting the expansion unit 80 or the like, the leg member 60 covers the first alignment portion (51A) or the second alignment portion (51B) which is a convex portion. Therefore, it is possible to reduce the influence on the appearance while having expandability. In addition, the uneven engagement can prevent the leg member 60 from slipping or falling off.

Further, the projection device 10 has a curved surface portion 61 in which the leg member 60 is curved in the left-right direction of the housing 20, and an inclined portion 62 in which both ends on the short side side are inclined so as to be cut diagonally. Even if an external force is applied to the leg member 60, it is difficult to get caught and it is possible to prevent the leg member 60 from falling off or slipping. In addition, the appearance of the installation unit 40 can be improved.

Further, the projection device 10 is provided with a round hole (814a) that engages with the first alignment portion (51A) of the projection device 10 and a long hole (814b) that engages with the second alignment portion (51B). The expansion unit 80 can align the expansion unit 80 with respect to the projection device 10 with high accuracy, and can add various expanded functions to the projection device 10.

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 embodiments, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and variations thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

The inventions described in the first claims of the present application are described below.
[1] A housing having a projection optical system that emits projected light is provided.
The housing has a first alignment portion for aligning the mounting position of the expansion unit for the projection device on a parallel axis that overlaps with the optical axis of the projection optical system in a plan view.
Projection device.
[2] The housing has an internal alignment protrusion and has an internal alignment protrusion.
The projection optical system is aligned and fixed by the internal alignment protrusions.
The projection device according to the above [1].
[3] The projection device according to the above [2], wherein a plurality of the internal alignment protrusions are provided along a first direction parallel to the optical axis in a plan view.
[4] The housing has a second alignment portion for aligning the mounting position of the expansion unit for the projection device.
The projection device according to the above [3], wherein the second alignment portion is provided on a normal line in a second direction perpendicular to the parallel axis when viewed from the first alignment portion.
[5] The projection device according to the above [4], wherein the first alignment portion and the second alignment portion are provided on different corners on the bottom surface of the housing and on the rear side of the housing.
[6]
A leg member that is detachably attached to the housing and includes a leg member having a recess at a position corresponding to a convex portion that functions as the first alignment portion or the second alignment portion. 4] or the projection device according to the above [5].
[7] The leg member has a curved surface portion curved in the left-right direction of the housing and an inclined portion inclined so that both ends on the short side are cut diagonally in the above-mentioned [6]. The projection device described.
[8] A round hole that engages with the first alignment portion of the projection device according to any one of [4] to [7], and a long hole that engages with the second alignment portion. An expansion unit of a projection device equipped with.

10 Projection device 11 Projection port 20 Housing 20a Top surface 20b Bottom surface 20b1 Screw hole 20c Left side surface 20d Right side surface 20e Front surface 20f Rear surface 20g Left front corner part 20h Left rear corner part 20i Right rear corner part 21 Upper case 21a Edge part 21b Operation panel 22 Lower case 22a Edge 22b Connection port 23 Front panel 23a Projection port opening 23b Intake port 23c Exhaust port 24 Rear panel 24a Intake port 25 Left panel 25a Intake port 25b Connection port 26 Grip part 30 Tilt arm 31a Left arm part 31b Right Arm part 31c Installation contact part 40 Installation part 50 Support part 51 (51A, 51B) Alignment protrusion 52 Outer peripheral rib 52a First side part 52b Second side part 53 Bottom surface 60 Leg member 60a First edge part 60b Second edge part 61 Curved part 62 Inclined part 63 Engaging part 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 part 522 Standing wall 523 Outer inclined part 524 Top part 631 Abutment part 632 Recession 633 Side surface 634 Inclined part 641 Opening part 710 Light source side housing 711a to 711d Flange part 712 Round hole 713 Long hole 714 Screw member 720 Projection side housing 811 Connection part 811a Convex part 812 Leg part 813 (813a to 813c) Fixed part 814a, 814b Engagement part 815 Screw hole 816 Lens mounting part 816a Opening part 831 Mounting hole part D1 First direction D2 Second direction G gap L Projected light P Optical axis Q Reference axis R Normal line

Claims (8)

It has a housing with a projection optical system that emits projected light.
The housing has a first alignment portion for aligning the mounting position of the expansion unit for the projection device on a parallel axis that overlaps with the optical axis of the projection optical system in a plan view.
Projection device. The housing has an internal alignment protrusion and has an internal alignment protrusion.
The projection optical system is aligned and fixed by the internal alignment protrusions.
The projection device according to claim 1. The projection device according to claim 2, wherein a plurality of the internal alignment protrusions are provided along a first direction parallel to the optical axis in a plan view. The housing has a second alignment portion for aligning the mounting position of the expansion unit for the projection device.
The projection device according to claim 3, wherein the second alignment portion is provided on a normal line in the second direction perpendicular to the parallel axis when viewed from the first alignment portion. The projection device according to claim 4, wherein the first alignment portion and the second alignment portion are provided on different corners of the bottom surface of the housing and on the rear side of the housing. A leg member that is detachably attached to the housing and includes a leg member having a recess at a position corresponding to a convex portion that functions as the first alignment portion or the second alignment portion. 4 or the projection device according to claim 5. The projection device according to claim 6, wherein the leg member has a curved surface portion curved in the left-right direction of the housing and an inclined portion inclined so that both ends on the short side are cut diagonally. .. An extension of a projection device including a round hole that engages with the first alignment portion and a long hole that engages with the second alignment portion of the projection device according to any one of claims 4 to 7. unit.

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