阅读说明：本技术 投影装置及投影透镜 (Projection device and projection lens ) 是由 清水仁 宫田保幸 黑田泰斗 于 2019-09-20 设计创作，主要内容包括：本发明提供一种便利性高的投影装置及投影透镜。投影装置(2)具备：驱动壳体(55),具有从中央部(96)突出的突出部(95)；投影透镜(10),具有第1旋转机构(88A)；及风扇(92),吸入或排出气体,中央部(96)在第1方向X的一侧即第1A方向X1侧具有第1A侧面(55C1)且在第1方向X的另一侧即第1B方向X2侧具有第2A侧面(55D1),突出部(95)在第1A方向X1侧具有第1B侧面(55C2),在第1B方向侧具有与投影透镜对置的第2B侧面(55D2),风扇(92)与第2A侧面(55D1)及第2B侧面(55D2)对置。(The invention provides a projection device and a projection lens with high convenience. A projection device (2) is provided with: a drive housing (55) having a projection (95) projecting from a central portion (96); a projection lens (10) having a 1 st rotation mechanism (88A); and a fan (92) that sucks or discharges gas, wherein the central portion (96) has a 1A-th side surface (55C1) on the 1A-th direction X1 side, which is one side in the 1X direction, and a 2A-th side surface (55D1) on the 1B-th direction X2 side, which is the other side in the 1X direction, the protruding portion (95) has a 1B-th side surface (55C2) on the 1A-th direction X1 side, and a 2B-th side surface (55D2) facing the projection lens on the 1B-th direction side, and the fan (92) faces the 2A-th side surface (55D1) and the 2B-th side surface (55D 2).)

1. A projection device is provided with:

an electro-optical element;

a drive case that houses the electro-optical element and has a central portion and a protruding portion protruding from the central portion;

a recessed portion;

a projection lens which is disposed in the recess, projects light irradiated from the electro-optical element onto a projection target, and has a 1 st rotation mechanism; and

a fan disposed in the driving case and sucking or discharging air,

the recess is adjacent to the protrusion in the 1 st direction,

the projection lens is disposed to extend from the drive housing toward the recess in a 2 nd direction intersecting the 1 st direction,

the central portion has a 1A side surface on one side in the 1 st direction, i.e., a 1A direction side, and a 2A side surface on the other side in the 1 st direction, i.e., a 1B direction side,

the projection has a 1B-th side surface on the 1A-th direction side, and a 2B-th side surface opposite to the projection lens on the 1B-th direction side,

the fan is opposed to the 2 nd side surface and the 2 nd side surface.

2. The projection apparatus according to claim 1,

the fan is opposed to the 1 st side surface and the 1 st side surface.

3. The projection device according to claim 2, comprising:

an exhaust port formed in the 1A-th side surface and the 1B-th side surface; and

an inlet port formed on the 2A side surface and the 2B side surface,

the area of the exhaust port is larger than that of the air inlet.

4. The projection device according to claim 2 or 3, comprising:

an exhaust fan as the fan, facing the 1B-th side surface;

an intake fan as the fan, the intake fan facing the 2B-th side surface;

a light source that irradiates light to the electro-optical element; and

a heat sink disposed adjacent to the light source,

the heat sink is located between the 1B-th side and the 2B-th side.

5. The projection apparatus according to any one of claims 1 to 4,

the fan opposite to the 2B-th side surface is an intake fan.

6. A projection device is provided with:

an electro-optical element;

a drive case that houses the electro-optical element;

a recessed portion;

a projection lens which is disposed in the recess, projects light irradiated from the electro-optical element onto a projection target, and has a 1 st rotation mechanism; and

and a 1 st locking mechanism which is positioned in the projection lens and switches whether the 1 st rotation mechanism can rotate or not.

7. The projection apparatus according to claim 6,

the projection lens has a 2 nd rotation mechanism,

the projection lens has a 2 nd locking mechanism for switching the 2 nd rotation mechanism to be rotatable or not.

8. The projection apparatus according to claim 7,

the 1 st and 2 nd locking mechanisms are buttons,

the 1 st and 2 nd locking mechanisms have buttons of different shapes from each other.

9. The projection apparatus according to claim 7 or 8,

the 1 st locking mechanism and the 2 nd locking mechanism switch the 1 st rotation mechanism and the 2 nd rotation mechanism through electric control to determine whether the rotation is possible or not,

the 1 st locking mechanism and the 2 nd locking mechanism are positioned on the surface of the projection lens part, and the projection lens is positioned between the 1 st rotating mechanism and the 2 nd rotating mechanism.

10. The projection apparatus according to any one of claims 7 to 9,

an operation switch for operating the projection device is provided on the drive case,

the operation switch and the 1 st lock mechanism are disposed on the same plane side in the projection apparatus.

11. A projection device is provided with:

an electro-optical element;

a drive case that houses the electro-optical element and has a central portion and a protruding portion protruding from the central portion;

a recessed portion;

a projection lens which is disposed in the recess, projects light irradiated from the electro-optical element onto a projection target, and has a 1 st rotation mechanism; and

3 feet arranged on the bottom surface of the driving shell,

the recess is adjacent to the protrusion in the 1 st direction,

the projection lens is disposed to extend from the drive housing toward the recess in a 2 nd direction intersecting the 1 st direction,

one of the feet is located on the bottom surface of the protrusion and two of the feet are located on the bottom surface of the central portion.

12. The projection apparatus according to claim 11,

the projection has a 1B-th side surface on one side in the 1 st direction, namely, a 1A-th direction side, and a 2B-th side surface opposite to the projection lens on the other side in the 1 st direction, namely, a 1B-th direction side,

the projection has a 4 th side in the 2 nd direction,

one of the feet is located at a corner corresponding to the 2B-th and 4-th sides.

13. The projection apparatus according to claim 11 or 12,

the central portion has a 3 rd side in the 2 nd direction,

two of the feet are located at corners corresponding to the 3 rd side.

14. A projection device is provided with:

an electro-optical element;

a drive case that houses the electro-optical element and has a central portion and a protruding portion protruding from the central portion;

a recessed portion;

a projection lens which is disposed in the recess, projects light irradiated from the electro-optical element onto a projection target, and has a 1 st rotation mechanism and a 2 nd rotation mechanism; and

an insertion opening on the driving housing for connection with an external power source or an external device,

the recess is adjacent to the protrusion in the 1 st direction,

the projection lens is disposed to extend from the drive housing toward the recess in a 2 nd direction intersecting the 1 st direction,

the central portion has a 1A side surface on one side in the 1 st direction, i.e., a 1A direction side, and a 2A side surface on the other side in the 1 st direction, i.e., a 1B direction side,

the projection has a 1B-th side surface on the 1A-th direction side, and a 2B-th side surface opposite to the projection lens on the 1B-th direction side,

the insertion opening is located on the 2 nd side surface, the 1 st side surface, or the 1 st B side surface.

15. The projection apparatus according to claim 14, comprising:

an air inlet formed on the 2A side surface; and

an exhaust port formed on the 1A side or the 1B side,

the insertion opening is located on the 2 nd side surface.

16. The projection apparatus according to claim 14 or 15,

the central portion has a 3 rd side in the 2 nd direction,

the 3 rd side has a length longer than the lengths of the 1 st and 1B sides,

the insertion opening is not provided in the 3 rd side surface.

17. A projection lens, comprising:

an incident portion into which light is incident from a 2 nd direction;

a 1 st optical axis bending member bending light from the incident portion toward a 3 rd direction intersecting the 2 nd direction;

a 2 nd optical axis bending member that bends the light from the 1 st optical axis bending member in the 2 nd direction;

a 1 st intermediate optical system and a 2 nd intermediate optical system which are located between the 1 st optical axis bending member and the 2 nd optical axis bending member on an optical path; and

a 2 nd rotation mechanism having the 2 nd intermediate optical system but not having the 1 st intermediate optical system.

18. The projection lens of claim 17 wherein,

the diameter of the lens of the 1 st intermediate optical system is larger than the diameter of the lens of the 2 nd intermediate optical system.

19. A projection device is provided with:

the projection lens of claim 17 or 18;

an electro-optical element;

a driving housing having the electro-optical element and to which the projection lens is connected; and

and a 1 st rotation mechanism configured to rotate the projection lens with respect to the drive housing.

20. The projection device according to claim 19, comprising:

an exit lens that emits light from the 2 nd optical axis bending member; and

a lens housing covering a part between the exit lens and the 2 nd rotation mechanism,

the lens housing can rotate by taking the 2 nd rotating mechanism as an axis,

the exit lens is rotatable with rotation of the lens housing.

Technical Field

The present invention relates to a projection apparatus and a projection lens.

Background

In recent years, projection apparatuses equipped with an image forming panel such as a liquid crystal display element or a DMD (Digital Micromirror Device) element have been widely used and have been increasingly high in performance.

Patent document 1 describes a liquid crystal projector that irradiates a transmissive liquid crystal panel with light from a light source and projects an image displayed on the liquid crystal panel onto a screen through a projection lens.

The liquid crystal projector disclosed in patent document 2 includes a projection lens that includes two reflecting members for bending an optical axis, and projects a light flux from a liquid crystal panel, which is irradiated from a light source, onto a screen by bending the light flux into a U-shape by the two reflecting members. The U-shaped projection lens can realize the compactness of the projection device main body and the compactness of the whole size of the projection device system comprising the projection device and the screen.

Prior art documents

Patent document

Patent document 1: japanese patent laid-open publication No. 2016-156986

Patent document 2: japanese laid-open patent publication No. 2012-098506

Disclosure of Invention

Technical problem to be solved by the invention

The present invention has been made in view of the above-mentioned background, and an object thereof is to provide a projection apparatus and a projection lens which are highly convenient.

Means for solving the technical problem

In order to achieve the above object, a projection apparatus according to the present embodiment includes: an electro-optical element; a drive case which houses the electro-optical element and has a central portion and a protruding portion protruding from the central portion; a recessed portion; a projection lens which is disposed in the recess, projects light irradiated from the electro-optical element onto a projection target, and has a 1 st rotation mechanism; and a 1 st fan disposed in the drive case and configured to suck or discharge gas, wherein the recess portion and the protrusion portion are adjacent to each other in a 1 st direction, the projection lens is disposed to extend from the drive case to the recess portion in a 2 nd direction intersecting the 1 st direction, the central portion has a 1 st a side surface on a 1 st a direction side which is one side in the 1 st direction and a 2 nd a side surface on a 1 st B direction side which is the other side in the 1 st direction, the protrusion portion has a 1 st B side surface on the 1 st a direction side and a 2 nd B side surface facing the projection lens on the 1 st B direction side, and the 1 st fan faces the 2 nd a side surface and the 2 nd B side surface.

Alternatively, the projection apparatus of the present embodiment is preferably a projection apparatus including: an electro-optical element; a drive case which houses the electro-optical element; a recessed portion; a projection lens which is disposed in the recess, projects light irradiated from the electro-optical element onto a projection target, and has a 1 st rotation mechanism; and a 1 st rotation lock switch which is located in the projection lens and switches whether or not the 1 st rotation mechanism can rotate.

Alternatively, the projection apparatus of the present embodiment is preferably a projection apparatus including: an electro-optical element; a drive case which houses the electro-optical element and has a central portion and a protruding portion protruding from the central portion; a recessed portion; a projection lens which is disposed in the recess, projects light irradiated from the electro-optical element onto a projection target, and has a 1 st rotation mechanism; and 3 legs provided on a bottom surface of the driving case, the recess being adjacent to the protrusion in a 1 st direction, the projection lens being provided to extend from the driving case to the recess in a 2 nd direction intersecting the 1 st direction, one of the legs being located on a bottom surface of the protrusion, and two of the legs being located on a bottom surface of the central portion.

Alternatively, the projection apparatus of the present embodiment is preferably a projection apparatus including: an electro-optical element; a drive case which houses the electro-optical element and has a central portion and a protruding portion protruding from the central portion; a recessed portion; a projection lens which is disposed in the recess, projects light irradiated from the electro-optical element onto a projection target, and has a 1 st rotation mechanism and a 2 nd rotation mechanism; and an insertion opening located on the driving housing and used for connecting with an external power supply or an external device, wherein the recessed part is adjacent to the protruding part in the 1 st direction, the projection lens is arranged to extend from the driving housing to the recessed part in the 2 nd direction crossed with the 1 st direction, the central part has a 1A side surface on one side in the 1 st direction, namely the 1A direction side, and a 2A side surface on the other side in the 1 st direction, namely the 1B direction side, the protruding part has a 1B side surface on the 1A direction side, and a 2B side surface opposite to the projection lens on the 1B direction side, and the insertion opening is located on the 2A side surface.

The projection lens of the present embodiment includes: an incident portion into which light is incident from a 2 nd direction; a 1 st optical axis bending member bending light from the incident portion in a 2 nd direction intersecting the 1 st direction; a 2 nd optical axis bending member bending the light from the 1 st optical axis bending member in a 1 st direction; a 1 st intermediate optical system and a 2 nd intermediate optical system located between the 1 st optical axis bending member and the 2 nd optical axis bending member on an optical path; and a 2 nd rotation mechanism having the 2 nd intermediate optical system and not having the 1 st intermediate optical system.

Drawings

Fig. 1 is a plan view showing a housed state of a projection apparatus of the present invention as viewed from a front surface side.

Fig. 2 is a plan view showing a housed state of the projector apparatus of the present invention as viewed from the bottom surface side.

Fig. 3 is a plan view of a main portion of the projection apparatus.

Fig. 4 is a plan view of a main portion of the projection apparatus.

Fig. 5 is a view showing the 1 st side of the projector apparatus in the accommodated state.

Fig. 6 is a view showing the 2 nd side of the projector apparatus in the accommodated state.

Fig. 7 is a view of the 1 st side of the projection apparatus with the projection lens removed.

Fig. 8 is a view showing the 3 rd side of the projector apparatus in the accommodated state.

Fig. 9 is a view showing the 4 th side of the projector apparatus in the accommodated state.

Fig. 10 is a perspective view showing a housed state of the projection apparatus.

Fig. 11 is a plan view showing a state of use of the projection apparatus as viewed from the front side.

Fig. 12 is a view showing the 4 th side of the projector apparatus in use.

Fig. 13 is a view showing the 3 rd side of the projector apparatus in use.

Fig. 14 is a view showing a 1 st side of the projector apparatus in a storage state.

Fig. 15 is a view showing the 2 nd side of the projector apparatus in the storage state.

Fig. 16 is a sectional view showing a main part of the projection lens.

Fig. 17 is a perspective view showing a use state of the projection apparatus.

Fig. 18 is a perspective view showing a use state of the projection apparatus.

Fig. 19 is a perspective view showing a use state of the projection apparatus.

Fig. 20 is a perspective view showing a use state of the projection apparatus.

Fig. 21 is a perspective view showing a use state of the projection apparatus.

Fig. 22 is a perspective view showing a use state of the projection apparatus.

Fig. 23 is a perspective view showing a use state of the projection apparatus.

Fig. 24 is a perspective view showing a use state of the projection apparatus.

Fig. 25 is a perspective view showing a use state of the projection apparatus.

Fig. 26 is a perspective view showing a use state of the projection apparatus.

Fig. 27 is a perspective view showing a use state of the projection apparatus.

Detailed Description

< projection apparatus main body >

Fig. 1 is a plan view of the projection apparatus 2 viewed from the surface 55A side. As shown in fig. 1, the projection apparatus 2 of the present embodiment includes a projection lens 10 and a drive case 55 as a main body of the projection apparatus. The drive case 55 includes a front surface 55A, a bottom surface 55B, a 1 st side surface 55C, a 2 nd side surface 55D, a 3 rd side surface 55E, and a 4 th side surface 55F. The drive case 55 has a retreat portion 91 corresponding to the degree of protrusion of the exit lens 36 located at the front end of the projection lens 10. The projector 2 mainly includes 3 portions, i.e., a recess 94, a protrusion 95 of the substantially L-shaped drive housing 55, and a central portion 96. The projection lens 10 is provided in the 2 nd direction Y so as to extend from the central portion 96 (a part of the drive housing 55) toward the recessed portion 94. The recess 94 can accommodate the projection lens 10. Also, the drive housing 55 has a protruding portion 95 corresponding to the recessed portion 94. The recessed portion 94 and the protruding portion 95 are adjacent to each other in the 1 st direction X.

Fig. 2 is a plan view of the projection apparatus 2 viewed from the bottom surface 55B side. The bottom surface 55B has 3 leg portions 81, one disposed at the protruding portion 95 and two disposed at the central portion 96. The 2 nd side surface 55D has a 2 nd side surface 55D1 on one side in the 2 nd direction Y, i.e., the 2 nd direction Y1, and a 2 nd a side surface 55D2 on the other side in the 2 nd direction Y, i.e., the 2 nd direction Y2. The leg 81 disposed on the projection 95 is disposed at a corner corresponding to the 2B-side surface 55D2 and the 4 th side surface 55F. The two leg portions 81 disposed in the center portion 96 are disposed at the corners of the 3 rd side surface 55E. More specifically, the leg 81 is disposed on the bottom surface 55B at one corner on one side in the 1 st direction X, i.e., the 1 st direction X1 side, and at one corner on the other side in the 1 st direction X, i.e., the 1B direction X2 side.

The 3 legs 81 are arranged in a triangular shape to support the projection apparatus 2 by the 3 formed surfaces. Since the shape of the drive case 55 of the present invention is substantially L-shaped, the leg 81 is preferably disposed as close to the projection lens 10 as possible on the 4 th side surface 55F side. On the other hand, the leg 81 is preferably not disposed at the corner of the protrusion 95 on the 1B direction X2 side. A stable support surface can be formed by the 3 legs 81, and if the legs 81 are excessively close to each other, the inclination and the wobbling of the projection apparatus may be caused. Each leg 81 may be configured to be adjustable in the protruding distance from the bottom surface 55B.

Fig. 3 is a plan view showing a main part of the projection apparatus 2. The projection apparatus 2 includes a light source module 63 as a driving laser element of the light source 64 and a heat sink 68 for cooling the light source module in the projection 95. The projection apparatus 2 includes a phosphor wheel 65 that converts the color of the light of the laser element, a color filter wheel 66, a light guide 69 that guides the light, a relay lens 72, a condenser lens 73, and a plurality of mirror members 67. The laser beam passes through a TIR (Total Internal Ref. indicator) prism 71 after passing through the respective optical members. A part of the reflected light is reflected by the DMD element 74, which is an electro-optical element, and is irradiated into the projection lens 10. The projection lens 10 displays a projection image on a projection target. The color of the laser beam is not particularly limited, but when the light source is to be constituted in one color, it is preferable that the light source is blue, and conversion is performed using blue light and a phosphor to generate green light and red light. The mirror member 67 may be a member that reflects light in a specular manner or a member that reflects light in a total amount.

The light source 64 is exemplified by a laser element, but is not limited thereto, and may be a light emitting diode element such as an LED. The light source may be red, blue, or green. The projection apparatus 2 may directly project light from an electro-optical element such as a display panel such as an organic EL panel or an LED panel, as in a head-up display, without using a light source. Further, the DMD element 74 is an example of the electro-optical element, but the electro-optical element is not limited to this, and a liquid crystal panel that transmits a part of light from a light source may be used. At this time, a dichroic prism may be used instead of the TIR prism 71.

The form of the heat sink 68 is not particularly limited as long as it is formed to increase the surface area using a metal such as aluminum or copper. For example, as shown in fig. 3, a shape having a plurality of fins is generally used. The shape of the heat sink 68 is described in, for example, U.S. patent application publication No. 2015/0029470, U.S. patent application publication No. 2006/0176453, U.S. patent application publication No. 2011/0261033, and japanese patent application laid-open No. 2018-031936.

In fig. 3, a power cable 76 is inserted into the 2 nd side surface 55D to supply power from the outside to the drive circuit 75. The drive circuit 75 includes a control unit for controlling the operation of the projection apparatus 2, an image processing unit for forming an image of RGB3 colors using an electro-optical element, and the like. The drive circuit 75 is disposed so as not to overlap the mirror 67, TI R prism 71, and DMD element 74, but is not limited thereto, and may be disposed so as to overlap each optical component. The details of the inlet of the power cable will be described with reference to fig. 10.

As shown in fig. 4, the projection apparatus 2 has an exhaust port 83 on the 1 st side surface 55C side and an intake port 82 on the 2 nd side surface 55D side. More specifically, the 1 st air inlet 82A is disposed on the 2 nd a side surface 55D1, and the 2 nd air inlet 82B is disposed on the 2 nd B side surface 55D2 of the protruding portion 95. Therefore, the 1 st fan and the 2 nd fan are disposed corresponding to the intake port 82 or the exhaust port 83. The 2B-th side surface 55D2 faces the projection lens 10, but the cooling efficiency of the projection device 2 is improved by using this surface also as an intake port or an exhaust port. In fig. 4, the 1 st fan corresponds to the intake fan 92, and the 2 nd fan corresponds to the exhaust fan 93. An intake fan 92 and an exhaust fan 93 are disposed. Most of intake fan 92 is disposed closer to 1 st intake port 82A than to 2 nd intake port 82B.

The arrows in fig. 4 indicate the flow direction of the wind. As shown by the arrows, by disposing the air inlet 82 or the air outlet 83 as in the present embodiment, the wind can be directly and sufficiently blown to the light source module 63, the light source 64, and the heat sink 68 located in the protruding portion 95. Therefore, the projection apparatus 2 can efficiently cool these components. Further, an intake port may be disposed on the 1B-th side surface 55C2 and an exhaust port may be disposed on the 2B-th side surface 55D2 of the protrusion 95. In the case of such a configuration, hot wind may blow the projection lens 10 from the exhaust port, and may deteriorate components of the projection lens 10. Therefore, the configuration as shown in fig. 4 is most preferable.

The details of the intake port 82 and the exhaust port 83 will be described with reference to fig. 5, 6, and 7. Fig. 5 is a side view of the projection apparatus 2 viewed from the 1 st side surface 55C side. In the projection apparatus 2, the exhaust port 83 is integrally formed in the 1A-th side surface 55C1 and the 1B-th side surface 55C 2. The exhaust port 83 is formed integrally with the intake port 82, which will be described later, to be large, and thus has high exhaust efficiency. In this way, in the projection apparatus 2, the exhaust port 83 is formed larger than the intake port 82.

Fig. 6 is a side view of the projection apparatus 2 viewed from the 2 nd side surface 55D side. The projection apparatus 2 has a 1 st air inlet 82A formed in the 2 nd a side surface 55D 1. The 2 nd side surface 55D1 is provided with a power cable port 54 for a power cable (an example of an insertion port) and a video cable port 52 for a video cable (an example of an insertion port). The video cable connects the projector 2 to an external device such as a personal computer that outputs a video signal. As the type of the video cable, for example, an HDMI (registered trademark) cable, a DVI cable, and a VGA cable can be used. Fig. 7 is a diagram of fig. 6 with the projection lens 10 separated. In this manner, the 2 nd intake port 82B is provided in the 2 nd side surface 55D 2.

Fig. 8 is a side view of the projection apparatus 2 viewed from the 4 th side surface 55F. As shown in fig. 8, an operation switch 51 for performing user operations such as image quality adjustment of an image, keystone correction of an image, power on and off, and the like is formed on the 4 th side surface 55F. A 1 st lock switch 90A (an example of a 1 st lock mechanism) and a 2 nd lock switch 90B (an example of a 2 nd lock mechanism) for switching whether or not the rotation mechanism of the projection lens 10 can be rotated are formed on the surface of the projection lens 10. The details of the switch will be described later. The projection lens 10 rotates on a plane formed by the 1 st direction X and the 3 rd direction Z about the 1 st rotation mechanism 88A disclosed in fig. 8 and 10. More specifically, the projection lens 10 is configured to be rotatable in the 1 st rotation direction 84 and the 2 nd rotation direction 85. The projection apparatus 2 has 3 legs 81 formed on the bottom surface thereof.

Fig. 9 is a side view of the projection apparatus 2 viewed from the 3 rd side 55E. As shown in fig. 9, an external device cable port 53 (an example of an insertion port) and a video cable port 52 for connecting to an external device such as a USB memory or a hard disk are formed on the 3 rd side surface 55E. On the other hand, the 3 rd side surface 55E is not formed with the power cable port 54 located on the 2 nd side surface 55D.

Fig. 10 is a perspective view showing a state in which the projection lens 10 of the projection apparatus 2 is housed. Fig. 10 is a view in which the projection apparatus 2 is placed upright with the 3 rd side surface 55E as the bottom and the 4 th side surface 55F as the upper. The 3 rd side surface 55E has a longer longitudinal length than the 1 st side surface 55C (the total of the 1A side surface 55C1 and the 1B side surface 55C 2). Therefore, the 3 rd side surface 55E has a wide area and can be used as a bottom when the projection apparatus 2 is placed upright. The projection lens 10 of the present embodiment includes not only the 1 st rotation mechanism 88A but also the 2 nd rotation mechanism 88B that is rotatable in the 3 rd rotation direction 86 and the 4 th rotation direction 87. Therefore, even when the projection apparatus 2 is placed upright, the projection apparatus 2 can project images in all directions as shown in fig. 17 to 27. Further, even when the projector apparatus 2 is placed upright, the operation switch 51 is positioned at the upper portion, and therefore, the user can easily perform the operation.

As described above, the projection apparatus 2 also assumes a standing position with the 3 rd side surface 55E as a bottom. That is, the power cable port 54 (an example of an insertion port) of the power cable 76 shown in fig. 3 is formed on the 2 nd side surface 55D, not the 3 rd side surface 55E. This is because the power cable 76 must be always connected when the projection apparatus 2 is used, and cannot be disposed on the 3 rd side surface 55E serving as the lower portion. The projection apparatus 2 of fig. 10 can be placed in two ways, i.e., horizontally with the bottom surface 55B as the bottom and vertically with the 3 rd side surface 55E as the bottom. The projection apparatus 2 may also have an external device cable port 53 on the 2 nd side surface 55D. In addition, the power cable port 54 may be formed at the 1 st side 55C. However, since the area of the intake port 82 or the exhaust port 83 is reduced by forming the power cable port 54, the power cable port 54 is preferably disposed on the side of the intake port 82, which is less important.

As shown in fig. 10, in the projection lens 10, the lens housing 89 is disposed at a position closer to the front end side than the 2 nd rotation mechanism 88B. The lens housing 89 is a housing that covers the components positioned between the exit lens 36 and the 2 nd rotation mechanism 88B. In fig. 16, the lens housing 89 covers the 2 nd mirror 15 as the 2 nd optical axis bending member, and is rotatable on a plane formed by the 2 nd direction Y and the 3 rd direction Z around the axis of the 2 nd rotation mechanism 88B. Further, the output lens 36 can also rotate as the lens housing 89 rotates. The lens housing 89 and the drive housing 55 are formed of a molded component of plastic or the like. The corners of the lens housing 89 and the drive housing 55 are curved and have a shape that is easily grasped by a user. Therefore, the user can hold the lens housing 89 with his hand and rotate the projection lens 10 in the 1 st rotation direction 84 and the 2 nd rotation direction 85(X-Z plane rotation) shown in fig. 8. Similarly, the user can hold the lens housing 89 with his hand and rotate the projection lens 10 in the 3 rd rotation direction 86 and the 4 th rotation direction 87(Y-Z plane rotation) shown in fig. 10.

Also, the corner portions of the lens housing 89 are bent to be the same as the corner portions of the drive housing 55 as a main body. Also, the side surface of the lens housing 89 is located on the same plane as the surfaces of the 4 th side surface 55F and the 2 nd side surface 55D, which are aligned with each other. Therefore, although the projection apparatus 2 has the concave portion 94, the combined lens housing 89 has a substantially quadrangular shape. Thus, the projector apparatus 2 has both high design and portability.

Next, a lock mechanism of the rotation mechanism of the projection lens 10 will be described. In fig. 10, a 1 st lock switch 90A and a 2 nd lock switch 90B as lock mechanisms are provided on a surface of a portion of the projection lens 10 located between the 1 st rotation mechanism 88A and the 2 nd rotation mechanism 88B. The 1 st lock switch 90A is operated to lock the rotation of the 1 st rotation mechanism 88A, and the 2 nd lock switch 90B is operated to lock the rotation of the 2 nd rotation mechanism 88B. This prevents the projection lens 10 from moving due to some external factors during use of the projection apparatus 2. In addition, the user can carry the projection lens 10 with him or her during the transportation of the projection apparatus 2.

The shapes of the buttons of the 1 st and 2 nd lock switches 90A and 90B are different from each other. The 1 st lock switch 90A is circular in shape corresponding to the outer peripheral shape of the member extending from the 1 st rotation mechanism 88A. On the other hand, the 2 nd lock switch 90B has a quadrangular shape corresponding to the shape of the lens housing 89 adjacent to the 2 nd rotation mechanism 88B. As such, user convenience is improved by visually distinguishing the kinds of the two switch shapes.

The 1 st lock switch 90A and the 2 nd lock switch 90B are electrically connected to the drive circuit 75 shown in fig. 3 by connection wires, not shown. The projection apparatus 2 controls the mechanical mechanisms of the 1 st rotation mechanism 88A and the 2 nd rotation mechanism 88B using the power supplied from the drive circuit 75. The projection lens 10 of the present embodiment is rotated by the 1 st rotation mechanism 88A and the 2 nd rotation mechanism 88B, and the connection wiring of each lock switch is also subjected to a load accompanying the rotation. In particular, when the respective lock switches 90A and 90B are formed in the lens housing 89, the connection wiring needs to be disposed in the projection lens 10 so as to be subjected to rotation of two axes. Such rotation of the two shafts applies a large load to the material of the connection wiring.

Therefore, in fig. 10, a 1 st lock switch 90A and a 2 nd lock switch 90B are provided on the surface of a portion of the projection lens 10 located between the 1 st rotation mechanism 88A and the 2 nd rotation mechanism 88B. Thus, the projector apparatus 2 can achieve both the convenience of the user and the stability of the connection wiring. In addition, although the embodiment in which the 1 st rotation mechanism 88A and the 2 nd rotation mechanism 88B are electrically locked has been described, each rotation mechanism may be a lock mechanism using only a mechanical structure and not using electricity.

The 1 st lock switch 90A and the 2 nd lock switch 90B are disposed on the 4 th side surface 55F side and on the same side as the operation switch 51. In other words, the 1 st lock switch 90A, the 2 nd lock switch 90B, and the operation switch 51 are disposed on the same plane side in the projection apparatus 2. Thus, the user can visually recognize and operate the operation switch 51, the 1 st lock switch 90A, and the 2 nd lock switch 90B by only viewing one surface side. The user of the projection apparatus 2 is highly convenient.

Fig. 11 is a plan view showing a state of use of the projection apparatus 2. Fig. 11 is a view of the 1 st rotation mechanism 88A rotated by 90 ° and the 2 nd rotation mechanism 88B rotated by 90 ° from the storage state of fig. 1. Fig. 12 is a side view showing a use state of the projection apparatus 2. Fig. 12 is a view of the 1 st rotation mechanism 88A rotated by 90 ° and the 2 nd rotation mechanism 88B rotated by 90 ° from the storage state of fig. 8. Fig. 12 is a side view of the projection apparatus 2 of fig. 11, also seen from the 4 th side surface 55F. Fig. 13 is a view of the 1 st rotation mechanism 88A rotated by 90 ° and the 2 nd rotation mechanism 88B rotated by 90 ° from the storage state of fig. 9. Fig. 13 is a side view of the projection apparatus 2 of fig. 11, also seen from the 3 rd side surface 55E. As shown in these figures, the projection apparatus 2 can change the direction of the projected image by rotating the projection lens 10 about the respective rotation mechanisms 88A and 88B.

Fig. 14 is a side view showing a usage state of the projection apparatus 2 as viewed from the 1 st side surface 55C. Fig. 14 shows a state in which the projection apparatus 2 of fig. 11 is placed upright with the 3 rd side surface 55E as a bottom. Fig. 15 is a side view showing a usage state of the projection apparatus 2 as viewed from the 2 nd side surface 55D. Similarly, fig. 15 shows a state in which the projection apparatus 2 of fig. 11 is placed upright with the 3 rd side surface 55E at a low position. As shown in fig. 15, since the projector apparatus 2 has the power cable port 54 and the video cable port 52 on the side surface, no problem occurs even when the projector apparatus 2 is placed upright.

< projection lens >

Fig. 16 is a sectional view of the projection lens 10 of the present embodiment. The lens housing 89 and the 1 st and 2 nd lock mechanisms 90A and 90B shown in fig. 10 are omitted for the purpose of explaining the main parts of the projection lens. The projection lens 10 includes a 1 st optical system 11, a 2 nd optical system 12, a 3 rd optical system 13, a 1 st mirror 14 as a 1 st reflecting member, a 2 nd mirror 15 as a 2 nd reflecting member, a 1 st holding member 16, a 2 nd holding member 17, and a 3 rd holding member 18. The 1 st to 3 rd holding members 16 to 18 constitute a lens barrel 19.

The 1 st optical system 11 is composed of a 1 st lens 21 and a 2 nd lens 22. For simplicity of illustration, the 1 st lens 21 and the 2 nd lens 22 are shown as single lenses, but may actually be constituted by a plurality of lens groups. The light emitted from the DMD element 74 (an example of the electro-optical element) enters the incident portion 21A from the 2 nd direction Y. Then, the light flux from the incident portion 21A enters the 1 st optical system 11 and is guided to the projection object side. In the present embodiment, the 1 st optical system 11 forms an image formed by the DMD element 74 on the image forming surface 23 as an intermediate image.

The 1 st holding member 16 integrally holds the 1 st optical system 11. The 1 st holding member 16 includes a 1 st body portion 24, a 1 st lens frame 25, and a 1 st mounting tube 26. The 1 st lens frame 25 holds the 1 st lens 21. The 1 st body part 24 has a mounting part 27 and a mounting flange 28, and holds the 1 st lens frame 25 at the center. The mounting portion 27 is inserted into an insertion hole 60A provided in the drive housing 55.

The insertion hole 60A is a through hole that opens inside the drive housing 55. In a state where the mounting portion 27 is inserted into the insertion hole 60A, the 1 st holding member 16 is inserted to a position where the mounting flange 28 contacts the mounting surface 60B. The mounting flange 28 is then secured to the drive housing 55, for example by screw fastening. The 1 st holding member 16 attached to the drive housing 55 is inserted to a position where the incident portion 21A of the 1 st lens 21 (an example of the front end surface of the DMD element 74) is arranged inside the drive housing 55.

The 1 st mounting tube 26 is connected to the 1 st body portion 24 and holds the 2 nd lens 22 therein. The 1 st mounting tube 26 has a cylindrical shape, and the central axis thereof coincides with the optical axis CL1 of the 1 st optical system 11. As will be described later, the 1 st mounting tube 26 is mounted with the 2 nd holding member 17.

The 2 nd holding member 17 holds the 1 st mirror 14. The 2 nd holding member 17 has a 2 nd mounting tube 29, a 2 nd body portion 31, and a 3 rd mounting tube 32. The 2 nd mounting tube 29 has a cylindrical shape, and an inner peripheral surface thereof is rotatably inserted into an outer peripheral surface of the 1 st mounting tube 26. The 1 st rotation mechanism 88A shown in fig. 10 is configured by the 2 nd holding member 17, the insertion hole 60A, and the mounting surface 60B. The 2 nd holding member 17 is rotatably supported by the 1 st rotation mechanism 88A about an optical axis CL1 of the 1 st optical system 11 together with the 1 st mirror 14, a 3 rd holding member 18, a 2 nd optical system 12, a 3 rd optical system 13, and a 2 nd mirror 15, which will be described later. A stopper, not shown, is provided between the 1 st mounting tube 26 and the 2 nd mounting tube 29 to prevent the 2 nd mounting tube 29 from being separated from the 1 st mounting tube 26 in a direction parallel to the optical axis CL 1.

The 2 nd body 31 is connected to the 2 nd mounting tube 29 by a fixing means such as a screw. The 2 nd body 31 is formed of a substantially rectangular parallelepiped corner post. The corner of the 2 nd body 31 on the lower plate 31a side constitutes a slope 31 b. The 1 st mirror 14 is fixed to the inner surface of the inclined surface portion 31 b.

The 1 st mirror 14 is disposed between the 1 st optical system 11 and an image forming surface 23 of the intermediate image formed by the 1 st optical system 11. The 1 st mirror 14 bends the optical axis CL1 of the 1 st optical system 11 extending in the 2 nd direction Y by reflection to form an optical axis CL 2. In the present embodiment, the 1 st reflecting mirror 14 bends the optical axis CL1 by 90 ° to form an optical axis CL 2. Thereby, the optical axis CL2 extends in the 3 rd direction Z.

The 3 rd mounting tube 32 is fixed to the 2 nd body 31 by a fixing mechanism such as a screw, and is disposed substantially perpendicular to the 2 nd mounting tube 29 via the 2 nd body 31. The 3 rd mounting tube 32 has a cylindrical shape, and the 3 rd holding member 18 is mounted.

The 3 rd holding member 18 integrally holds the 2 nd optical system 12, the 2 nd mirror 15, and the 3 rd optical system 13. The 2 nd optical system 12 is composed of a 3 rd lens 33 (1 st intermediate optical system) and a 4 th lens 34 (2 nd intermediate optical system). The 2 nd lens frame 38 holds the 4 th lens 34. The 2 nd rotation mechanism 88B shown in fig. 10 is constituted by the 3 rd mounting tube 32 and the 2 nd lens frame 38 of the 3 rd holding member 18 and the like.

The 3 rd lens 33 (1 st intermediate optical system) has a longer diameter than the 4 th lens 34 (2 nd intermediate optical system) that rotates together with the 2 nd lens frame 38. The number of lenses of the 4 th lens 34 (2 nd intermediate optical system) is larger than that of the 3 rd lens 33 (1 st intermediate optical system). By forming the 3 rd lens 33 to be large, the diameter of the 4 th lens 34 formed of a plurality of lenses can be shortened. Further, the 2 nd lens frame 38 holds only the 4 th lens 34, and thus the size of the lens frame can be reduced. Therefore, the 3 rd holding member 18 and the 2 nd optical system 12 are compact in size. The 3 rd lens 33 (1 st intermediate optical system) may be constituted by only one lens or a plurality of lenses.

The 3 rd optical system 13 is composed of a 5 th lens 35 and an exit lens 36. For simplicity of illustration, the 3 rd lens 33 to the exit lens 36 are shown as single lenses, but may be actually configured by a plurality of lens groups.

The light beam from the 1 st optical system 11 is incident on the 2 nd optical system 12 and guided to the projection object side. The light beam from the 2 nd optical system 12 is incident on the 3 rd optical system 13 and guided to the projection object side. In the present embodiment, the 2 nd optical system 12 and the 3 rd optical system 13 enlarge and project the intermediate image formed on the image forming surface 23 by the 1 st optical system 11, for example, onto the screen 37 as the projection target. The 1 st to 3 rd optical systems 11 to 13 are described in detail in, for example, "projection optical system and projection display device" in japanese patent laid-open nos. 2016 and 156986 and 2016 and 156983, and the optical systems described in these patents can be used as the 1 st to 3 rd optical systems 11 to 13.

The 2 nd mirror 15 is disposed between the 2 nd optical system 12 and the 3 rd optical system 13. The 2 nd mirror 15 bends the optical axis CL2 by reflection to form an optical axis CL 3. In the present embodiment, the 2 nd mirror 15 bends the optical axis CL2 by 90 ° to form the optical axis CL 3.

In the present embodiment, as described above, the optical axis CL1 on the incident side of the 1 st optical system 11 is reflected by the 1 st mirror 14 and bent by 90 °, thereby becoming the optical axis CL2 on the emission side. The optical axis CL2 on the incident side of the 2 nd optical system 12 is reflected by the 2 nd mirror 15 and bent by 90 °, and becomes an optical axis CL3 extending in the 2 nd direction Y. Accordingly, the optical axis CL3 is substantially parallel to the optical axis CL1 within a plane containing the optical axis CL1 and the optical axis CL 2. That is, the projection lens 10 bends the light beam emitted from the light source 64 shown in fig. 3 into a substantially U shape by the 1 st mirror 14 and the 2 nd mirror 15 and projects the bent light beam onto the projection target.

Further, since the projection lens 10 has a substantially U-shaped optical path as described above, the lens barrel 19 holding the 1 st optical system 11, the 2 nd optical system 12, the 1 st mirror 14, and the 2 nd mirror 15 is a substantially U-shaped barrel.

The 3 rd holding member 18 includes a 2 nd lens frame 38, a 3 rd body portion 39, and a 3 rd lens frame 41. The 2 nd lens frame 38 has a cylindrical shape and holds the 2 nd optical system 12, i.e., the 3 rd lens 33 and the 4 th lens 34. The outer peripheral surface of the 2 nd lens frame 38 contacts the inner peripheral surface of the 3 rd mounting tube 32.

The 3 rd body section 39 is connected to the 2 nd lens frame 38. The 3 rd body portion 39 is formed of a substantially rectangular parallelepiped corner post. The corner of the 3 rd main body 39 on the upper plate 39a side constitutes a slope 39 b. The 2 nd mirror 15 is fixed to the inner surface of the inclined surface portion 39 b.

The 3 rd lens frame 41 holds the 5 th lens 35 and the exit lens 36, which are the 3 rd optical system 13. A flange 41a is formed on the incident-side end surface of the 3 rd lens frame 41. The flange 41a of the 3 rd lens frame 41 is fixed to the 3 rd body portion 39 by a fixing mechanism such as a screw. The 3 rd lens frame 41 is disposed substantially orthogonal to the 2 nd lens frame 38 via the 3 rd body portion 39.

In the present embodiment, the 3 rd lens 33 and the 4 th lens 34 constituting the 2 nd optical system 12 are disposed between the 1 st mirror 14 and the 2 nd mirror 15. However, the projection lens 10 may be configured such that no lens constituting the 2 nd optical system 12 is disposed between the 1 st mirror 14 and the 2 nd mirror 15, for example. The 1 st mirror 14 and the 2 nd mirror 15 are not limited to mirrors that generate specular reflection of incident light, and may be mirrors that generate total reflection. The case where the optical path in the lens is substantially U-shaped has been described, but the shape is not limited to this. As shown in fig. 17 to 27 to be described later, the optical path in the lens is also an optical path other than the U-shape according to the rotation of the 1 st rotation mechanism 88A and the 2 nd rotation mechanism 88B.

< type of use State of projection apparatus >

Fig. 17 is a perspective view showing a state in which the projection lens 10 of the projection apparatus 2 is used. Fig. 17 is a view in which the projection apparatus 2 is placed upright with the 3 rd side surface 55E as the bottom and the 4 th side surface 55F as the upper. In contrast to fig. 10, the projection lens 10 is rotated by 90 ° about the 1 st rotation mechanism 88A and by 90 ° about the 2 nd rotation mechanism 88B. Then, by this rotation, the exit lens 36 can project a video image in the 1 st direction X.

Since the storage state of fig. 10 to the use state of fig. 17 can be realized by merely grasping the lens housing 89 and moving the arm and the wrist, the projection apparatus 2 is highly convenient for the user. When the projector apparatus 2 is placed upright, the operation switch 51 and the 1 st and 2 nd lock switches 90A and 90B can be seen from above. Therefore, the operability of the user of the projection apparatus 2 is also high.

Fig. 18 to 27 show the types of usage states other than those in fig. 17. In this manner, by combining the rotations of the 1 st rotation mechanism 88A and the 2 nd rotation mechanism 88B, the projection lens 10 can irradiate a video in all directions. Fig. 17 to 27 illustrate a case where the projection apparatus 2 is set upright. However, even when the state of the projection device 2 is changed to the horizontal state in which the bottom surface 55B is a lower portion, the projection lens 10 can naturally irradiate a video in all directions.

In the above embodiments, the projection device 2 is described as being disposed on a table, but the present invention is also applicable to a case where the projection device is suspended from a ceiling or the like. Further, although the example of projecting the image on the screen 37 has been described, the projection target is not limited to the screen 37, and it is also possible to project the image on various projection targets.

Description of the symbols

2-projection device, 10-projection lens, 11-1 st optical system, 12-2 nd optical system, 13-3 rd optical system, 14-1 st mirror, 15-2 nd mirror, 16-1 st holding member, 17-2 nd holding member, 18-3 rd holding member, 19-lens barrel, 21-1 st lens, 21A-incident part, 22-2 nd lens, 23-imaging plane, 24-1 st body part, 25-1 st lens frame, 26-1 st mounting cylinder, 27-mounting part, 28-mounting flange, 29-2 nd mounting cylinder, 31-2 nd body part, 31A-lower plate, 31 b-bevel part, 32-3 rd mounting cylinder, 33-3 rd lens, 34-4 th lens, 35-5 th lens, 36-exit lens, 37-screen, 38-2 nd lens frame, 39-3 rd body portion, 39 a-upper plate, 39B-slope portion, 41-3 rd lens frame, 41A-flange, 50-projection apparatus main body, 51-operation switch, 52-video cable port, 53-external device cable port, 54-power cable port, 55-drive housing, 55A-upper surface, 55B-bottom surface, 55C-1 st side surface, 55C 1-1A side surface, 55C 2-1B side surface, 55D-2 nd side surface, 55D 1-2 nd side surface, 55D 2-2 nd side surface, 55E-3 rd side surface, 55F-4 th side surface, 60A-2B-installation surface, 63-light source module, 64-light source, 65-phosphor wheel, 66-color filter wheel, 67-mirror member, 68-heat sink, 69-light guide, 71-TIR prism, 72-relay lens, 73-condenser lens, 74-DMD element, 75-driving circuit, 76-power cable, 81-leg, 82A-1 st air inlet, 82B-2 nd air inlet, 83-air outlet, 84-1 st rotation direction, 85-2 nd rotation direction, 86-3 rd rotation direction, 87-4 th rotation direction, 88A-1 st rotation mechanism, 88B-2 nd rotation mechanism, 89-lens housing, 90A-1 st lock switch, 90B-2 nd lock switch, 91-escape section, 92-intake fan, 93-exhaust fan, 94-recess, 95-projection, 96-central.