JP6848139B2 - Angle adjustment device for optical equipment - Google Patents

Description

The present invention relates to an angle adjusting device for an optical device that adjusts an angle centered on an optical axis with respect to an optical device including an optical system and an optical device main body excluding the optical system.

In general, an optical device, particularly a projector that projects an image on a screen, needs to be installed and used at a desired position such as a ceiling and accurately projects an image at a regular position on the screen. It has an adjustment function for position and angle. Specifically, when the projector is suspended from the ceiling by a hanging bracket fixed to the ceiling, or when the projector is installed on the installation table via the legs, the position of the projection screen is set after the projector is installed. The lens shift mechanism provided in the projector is used to displace the projection lens in the vertical and horizontal directions for adjustment, and the angle of the projection screen is adjusted using the adjustment mechanism attached to the hanging brackets and legs when the projector is installed. It is carried out.

Conventionally, as a technique related to such angle adjustment, a foot mechanism for adjusting a projector angle disclosed in Patent Document 1, an angle adjusting mechanism of a projector device disclosed in Patent Document 2, and a projector holding disclosed in Patent Document 3 have been used. The ingredients are known.

In the foot mechanism for adjusting the angle of the projector of Patent Document 1, the tubular body is movable in the uniaxial direction with respect to the axial core portion provided with the threaded portion extending in the uniaxial direction on the outer peripheral portion, and the rotation is prevented. A pair of foot portions arranged with a predetermined interval so that the shaft core portion can be rotated by the rotation operation of the fine adjustment dial which is engaged and covered in such a manner and coupled and fixed near the end portion of the tubular body. The direction of the threaded part of each shaft core is opposite), and each foot part is placed within the interval of each foot part, in the non-operated state where the push button is not pressed and in the state where the pressing operation is released. It is provided with a lock / unlock mechanism that mechanically locks the shaft core and releases the mechanical lock to the shaft core of each foot while pressing. ..

The angle adjusting mechanism of the projector device of Patent Document 2 includes a sliding leg portion slidably projecting downward and a plurality of first engaging convex portions projecting side by side on the side surface of the sliding leg portion. , The first engaging convex portion and the stopper member in which a plurality of engaging and separable second engaging convex portions are projected are provided, and the stopper member constantly urges the sliding leg portion with a force. The first engaging convex portion is the first locking portion formed upward, and the second engaging convex portion is the second locking portion formed facing downward the second engaging convex portion. Are in contact with each other, and the first locking portion and the second locking portion are formed so as not to slip.

The projector holder of Patent Document 3 is a projector holder provided with three or more arms, an arm holder, an X-axis holder, a Y-axis holder, a Z-axis bolt, and a ceiling bracket. On the other hand, the end is fixed to the projector fixing hole, the arm is fixed to the arm holder in a free position, the arm holder is rotatably fixed to the X-axis holder, and the X-axis holder is fixed to the Y-axis holder. It is rotatably fixed, and the Z-axis bolt is rotatably fixed to the ceiling bracket.

Japanese Unexamined Patent Publication No. 2004-317608 Japanese Unexamined Patent Publication No. 2009-31489 Japanese Unexamined Patent Publication No. 2013-80139

However, the conventional technique related to the above-mentioned angle adjustment has the following problems.

First, since the adjustment mechanism attached to the mechanism such as the hanging bracket is used, the angle adjustment range is limited. That is, since it is basically assumed that the projector is installed on a horizontal ceiling and the screen is installed horizontally on a wall surface or the like, the projector is installed even if it can be sufficiently coped with from the viewpoint of fine adjustment of the angle. For example, if the place to be used is a ceiling inclined to 45 [°] or the side of a support column in a room, it is practically difficult to adjust, and a wide angle adjustment range that can adjust the angle corresponding to various installation locations is realized. From the point of view, it is not possible to fully meet the request.

Secondly, since the adjustment mechanism is based on the mechanical configuration attached to the hanging brackets that support the relatively heavy projector itself, it is necessary to adjust the heavy object itself at the time of adjustment, which makes the adjustment work very difficult. At the same time, it is difficult to make accurate adjustments. Moreover, since the original rigidity and strength of the support mechanism such as the hanging bracket may be lowered, the angle adjusted by long-term use is likely to be displaced, and the durability and reliability of the support mechanism are likely to be lowered. is there.

An object of the present invention is to provide an angle adjusting device for an optical device that solves the problems existing in such a background technique.

The angle adjusting device 1 for an optical device according to the present invention adjusts an angle centered on an optical axis with respect to an optical device M including an optical system Mc and an optical device main body Mm excluding the optical system Mc. It is an apparatus, and is arranged in the middle of at least two lens portions U1 and U2 along the optical axis in the optical system Mc, and the incoming light C is input by a combination of three prism members 11a, 11b, and 11c. An optical conversion unit unit 2 using a prism unit 11 that makes the light emitting axis So parallel to the light input axis Si by reflecting the light in a direction offset with respect to the axis Si and then rereflecting the optical conversion unit unit 2 and the optical conversion unit unit. The relay lens unit used for the rotation support mechanism unit 3 that rotatably displaces and fixes 2 around the optical axis Si, and the lens unit U1 of the rear Fsr in the optical traveling direction in the two lens units U1 and U2. It is characterized in that it is provided with Ur.

In this case, according to a preferred embodiment of the invention, the rotation support mechanism portion 3 is provided with a support ring portion 12 that is rotatably fitted to the front end of the lens portion U1 at the rear Fsr in the optical direction, and the support ring portion 12 is provided. In addition, a unit support portion 3s having a support block portion 13 that supports the optical conversion unit portion 2 can be provided. Further, the support block portion 13 can be provided with prism mounting surfaces 13a and 13c for supporting the prism unit 11, and at this time, the prism mounting surfaces 13a and 13c are at least a part of the prism members 11b and 11c. It can be provided in a positional relationship that creates a predetermined gap Lg between the facing surfaces. On the other hand, the optical conversion unit unit 2 may be provided with a lens shift mechanism unit 15 that displaces the lens unit U2 in the optical conversion forward Fsf in the horizontal direction and / or the vertical direction. A projection lens unit Ue can be used for the lens unit U2 at the front Fsf in the phototravel direction.

According to the angle adjusting device 1 for an optical device according to the present invention having such a configuration, the following remarkable effects are obtained.

(1) Basically, since the optical conversion unit unit 2 can be rotationally displaced 360 [°] about the optical axis Si, the place where the optical device M such as a projector is installed is, for example, 45 [. It is possible to realize a wide angle adjustment range that can be used in various installation locations, such as the angle can be adjusted even on the ceiling that is inclined to [°] or the side of the pillar in the room.

(2) When adjusting the angle, it is sufficient to rotate some of the parts constituting the optical system Mc, so that an easy and accurate adjustment process can be realized. Moreover, since it does not affect the rigidity and strength of the support mechanism such as the hanging bracket, the original rigidity and strength of the support mechanism can be secured, the adjustment angle is less likely to shift even in long-term use, and the durability and reliability of the support mechanism. It can also contribute to the improvement of sex.

(3) Since the prism unit 11 is used for the optical conversion unit 2, it is necessary for the angle adjusting device 1 because high rigidity and strength can be easily secured unlike the case where a mirror unit or the like in which mirrors are combined is used. It is optimal as the optical conversion unit unit 2 when constructing the angle adjusting device 1 because the stability and reliability can be ensured.

(4) Since the prism unit 11 is composed of a combination of three prism members 11a, 11b, and 11c, the target optical conversion unit unit 2 can be easily obtained, and optics with high optical accuracy and optical stability can be easily obtained. The conversion unit unit 2 can be obtained.

(5) Since a relay lens unit Ur is used for the lens unit U1 of the two lens units U1 and U2 in the rearward Fsr in the phototravel direction, when the display panel unit is built in the optical device main body Mm, the actual display panel unit is substantially used. The target position can be changed to the front Fsf in the optical direction with respect to the actual arrangement position Xs, particularly to the outside in front of the optical instrument main body Mm. As a result, the light emitted from the display panel unit is directly input to the optical conversion unit unit 2, and the angle adjustment based on the optical conversion unit 2 is not restricted by the existing optical system. It can be done flexibly and reliably.

(6) According to a preferred embodiment, when the rotation support mechanism portion 3 is configured, the support ring portion 12 that is rotatably fitted to the front end of the lens portion U1 at the rear Fsr in the optical direction and the support ring portion 12 are provided. Further, if the unit support portion 3s having the support block portion 13 for supporting the optical conversion unit portion 2 is provided and configured, it can be carried out by retrofitting to the lens portion U1 without changing the optical device main body portion Mm. It is excellent in ease and low cost, and can also enhance versatility and expandability.

(7) According to a preferred embodiment, if the support block portion 13 is provided with the prism mounting surfaces 13a and 13c for supporting the prism unit 11, the support block portion 13 can be used as a frame member for assembling the prism unit 11 itself. , The sticking process for assembling the prism unit 11 itself can be significantly reduced, and the prism unit 11 can be assembled easily and reliably.

(8) According to a preferred embodiment, when the prism mounting surfaces 13a and 13c are provided, if they are provided in a positional relationship that creates a predetermined gap Lg between at least a part of the prism members 11b and the facing surfaces of the 11c, the gap Lg Since the heat insulation mechanism can avoid heat transfer between the prism members 11b and 11c, the heat resistance of the entire prism unit 11 can be improved, and heat resistance measures can be easily taken.

(9) According to a preferred embodiment, if the optical conversion unit unit 2 is provided with a lens shift mechanism unit 15 that displaces the lens unit U2 in the front Fsf in the phototravel direction in the lateral and / or vertical directions at the front Fsf in the optical direction. Since the position with respect to the projection screen can be adjusted, even if the position of the projection screen is displaced due to the angle adjustment by the angle adjusting device 1, the displacement of the position by the angle adjusting device 1 can be easily eliminated. ..

(10) According to a preferred embodiment, if the projection lens unit Ue is used for the lens unit U2 in the front Fsf in the phototravel direction, the projection lens unit Ue can be designed as a dedicated projection lens for the optical conversion unit unit 2, so that the projection lens unit can be designed. It is possible to construct an optimum optical system Mc that matches Ue with the optical conversion unit unit 2 and further with the lens shift mechanism unit 15.

An external perspective view showing a state in which the angle adjusting device according to the preferred embodiment of the present invention is attached to the relay lens portion. External perspective view showing the same angle adjustment device and relay lens unit, respectively. Front view of the same angle adjustment device, Side view of the same angle adjustment device, A perspective view showing a method of attaching a prism member to a support block portion provided in the same angle adjusting device. A perspective view showing how to attach another prism member to the support block portion provided in the same angle adjusting device. Cross-sectional side view showing the state where the same angle adjusting device is attached to the relay lens portion, A front view showing an example of an operation means for rotating the optical conversion unit portion provided in the same angle adjusting device, External side view showing an example of an optical system configured with the same angle adjusting device, Explanatory drawing of the operation of the same angle adjusting device,

Next, preferred embodiments according to the present invention will be given and described in detail with reference to the drawings.

First, in order to facilitate the understanding of the angle adjusting device 1 according to the present invention, an outline of the optical device M capable of using the angle adjusting device 1 will be described with reference to FIG. Note that FIG. 9 shows a general-purpose projector as an example of the optical device M, and also shows a state in which the angle adjusting device 1 according to the present embodiment is provided.

As shown in FIG. 9, the optical device M includes an optical system Mc and an optical device main body Mm excluding the optical system Mc. The optical device main body Mm is covered with a cabinet 21, and a lens mounting opening 21h is provided on the front surface of the cabinet 21. Further, an interchangeable lens type projection lens portion (not shown) is provided, and the rear side of the projection lens portion is inserted into the lens mounting opening 21h from the outside and attached to the mount portion 22 of the optical device main body Mm. ing. A display panel unit 23 such as a liquid crystal panel is built in the optical device main body portion Mm, and is mounted in a fixed state at a predetermined position Xs in which an appropriate back focus is secured with respect to the projection lens portion.

Next, the configuration of the angle adjusting device 1 according to the present embodiment will be specifically described with reference to FIGS. 1 to 9.

As shown in FIGS. 1 to 4, the angle adjusting device 1 according to the present embodiment is roughly classified into an optical conversion unit unit 2 and a rotation support mechanism unit 3. As shown in FIG. 9, the optical conversion unit 2 is arranged between the two lens portions U1 and U2 along the optical axis in the optical system Mc, and as shown in FIG. 4, the incoming light C is received. It has an optical conversion function that makes the light output axis So parallel to the optical axis Si by reflecting it in a direction offset with respect to the axis Si and then rereflecting it. On the other hand, the rotation support mechanism unit 3 has a support function for supporting the optical conversion unit unit 2 so that it can be rotationally displaced and fixed around the optical axis Si.

In the example, the relay lens unit Ur was applied to one lens unit U1 of the two lens units U1 and U2, and the projection lens unit Ue was applied to the other lens unit U2. As the projection lens unit Ue, it is also possible to use the projection lens unit provided in the above-mentioned optical device M. As a result, the relay lens unit Ur is arranged at the rear Fsr in the optical direction with respect to the optical conversion unit 2, and the projection lens unit Ue is arranged at the front Fsf in the optical direction with respect to the optical conversion unit 2.

Therefore, as shown in FIGS. 1 and 2, the angle adjusting device 1 can be attached to the front end of the relay lens portion Ur, and the rotation support mechanism portion 3 rotates to the front end of the relay lens portion Ur. A unit support portion 3s having a support ring portion 12 that can be fitted into the support ring portion 12 and a support block portion 13 that is provided on the support ring portion 12 and supports the optical conversion unit portion 2 is provided.

In this case, as shown in FIGS. 2 and 7, the relay lens portion Ur is provided with a flange portion 32 near the front end on the outer peripheral surface of the lens barrel portion 31, and is formed with a large diameter at the front end of the lens barrel portion 31. Since the connection port 33 is provided, the support ring portion 12 is formed into a ring shape that fits inside the connection port 33 and can be rotationally displaced in the circumferential direction in the fitted state. Therefore, the rotation support mechanism portion 3 can be configured by adding a function capable of fixing the support ring portion 12 at an arbitrary position (angle) to the support ring portion 12. In FIG. 7, L1, L2, L3, and L4 indicate the first lens group, the second lens group, the third lens group, and the fourth lens group constituting the relay lens unit Ur, respectively.

Further, since the relay lens portion Ur has a flange portion 30 on the outer peripheral surface of the lens barrel portion 31, as shown in FIG. 9, the flange portion 30 is attached to the mount portion 22 in the optical device main body portion (projector main body portion) Mm. Can be installed. As a result, since the display panel unit 23 is built in the optical device main body Mm rearward in the optical direction Fsr, the actual position of the display panel unit 23 is changed to the forward Fsf in the optical direction with respect to the actual arrangement position Xs. Can be made to. That is, by using the relay lens unit Ur for the lens unit U1, the substantial position of the display panel unit 23 can be changed to the outside, which is in front of the optical device main body portion Mm. As a result, the light emitted from the display panel unit 23 is the same as directly entering the optical conversion unit unit 2 arranged in front of the relay lens unit Ur, and the angle adjustment based on the optical conversion unit unit 2 is performed. It can be performed more flexibly and reliably without being restricted by the existing optical system.

Further, FIG. 7 shows an example of the rotation support mechanism portion 3. In the example, a guide slit portion 34 ... Along the circumferential direction is formed on the stepped surface forming the connection port 33 of the relay lens portion Ur, and the fixing screw 35 ... is supported after passing through the guide slit portion 34 ... It is screwed to a position near the outer peripheral surface of the ring portion 12. In this case, if one guide slit portion 34 is formed over an angle range of approximately 180 [°], two guide slit portions 34 ... Can be provided, and the angle adjusting device 1 has an angle over approximately 180 [°]. Adjustment becomes possible. As a result, if the fixing screw 35 ... Is loosened, the support ring portion 12 can be rotationally displaced and can be adjusted to an arbitrary angle, and if the fixing screw 35 ... Is tightened, the support ring portion 12 can be adjusted at the adjusted angle. It can be fixed.

Therefore, FIG. 7 is an example in which the adjustment method is a manual type. On the other hand, FIGS. 8 and 9 show an example in which the adjustment method is an electric type. In this example, a rack gear 41 along the circumferential direction is integrally provided on the support ring portion 12, and a rotation drive portion 42 using an electric motor or the like is attached, and a pinion gear or a worm gear or the like rotated by the rotation drive portion 42 or the like is provided. The drive gear 43 of the above is meshed with the rack gear 41. As a result, if the rotary drive unit 42 is rotationally driven in the forward and reverse directions, the support ring portion 12 can be rotationally displaced in the forward and reverse directions, and if the drive of the rotary drive unit 42 is released, the support ring portion 12 is stopped (fixed). Can be made to. The adjustable angle range can be set by selecting the circumferential range in which the rack gear 41 is provided. For example, if it is provided over the entire circumference, it can be adjusted over an angle range of approximately 360 [°].

On the other hand, the specific configurations of the optical conversion unit 2 and the rotation support mechanism unit 3 described above are as follows. First, the optical conversion unit 2 uses the prism unit 11 shown in FIG. The illustrated prism unit 11 is composed of a combination of three prism members 11a, 11b, and 11c. As a result, as shown in FIG. 4, the prism unit 11 reflects the incoming light C in the direction offset with respect to the incoming light axis Si and then re-reflects the incoming light C to cause the light entering axis So to be reflected on the light entering axis Si. It has a function to make it parallel to. When the prism unit 11 is used as the optical conversion unit unit 2, high rigidity and strength can be easily secured unlike the case where a mirror unit or the like in which mirrors are combined is used, so that the stability required for the angle adjusting device 1 is required. It is optimal as the optical conversion unit unit 2 when constructing the angle adjusting device 1 because the reliability can be ensured. Further, when the prism unit 11 is configured, if it is configured by combining the three prism members 11a, 11b, 11c, the target optical conversion unit unit 2 can be easily obtained, and the optical accuracy and optical stability can be obtained. The optical conversion unit unit 2 having a high value can be obtained.

Further, the rotation support mechanism portion 3 includes a unit support portion 3s, and the unit support portion 3s has a function of supporting the prism unit 11. The unit support portion 3s is shown in FIGS. 5 and 6. The unit support portion 3s illustrated is a ring mounting portion 52 fixed to the front surface 12f (see FIG. 3) of the support ring portion 12 by a fixture 51 such as a screw, and a first prism protruding forward from the ring mounting portion 52. The member support portion 53 and the second prism member support portion 54 provided at the upper end of the ring mounting portion 52 are integrally formed, and the side surface of the first prism member support portion 53 has a prism mounting surface 13a on a vertical surface. At the same time, the upper surface of the second prism member support portion 54 has a prism mounting surface 13c formed by a horizontal plane. If such prism mounting surfaces 13a and 13c are provided, the support block portion 13 can be used as a frame member for assembling the prism unit 11 itself, so that the sticking process for assembling the prism unit 11 itself can be significantly reduced. , There is an advantage that the prism unit 11 can be easily and surely assembled.

Further, the prism mounting surface 13a is integrally formed with a prism positioning portion 13ac that projects from the prism mounting surface 13a and positions the prism member 11a fixed to the prism mounting surface 13a, and the prism mounting surface 13c is integrally formed with the prism positioning portion 13ac. A prism positioning portion 13cc that protrudes from the prism mounting surface 13c and positions the prism member 11c that is fixed to the prism mounting surface 13c is integrally formed.

When assembling (fixing) the prism unit 11 to the support block portion 13, first, as shown in FIG. 6, the lower surface of the second prism member 11b is attached to the upper surface of the first prism member 11a. Perform the assembly process to fix. After that, the side surface of the first prism member 11a is attached to and fixed to the prism mounting surface 13a of the support block portion 13. At this time, the prism member 11a is locked to the prism positioning portion 13ac for positioning. Further, as shown in FIG. 5, the lower surface of the third prism member 11c is attached and fixed to the prism mounting surface 13c of the support block portion 13. At this time, the prism member 11c is locked to the prism positioning portion 13cc for positioning.

By the way, when the prism mounting surfaces 13a and 13c are provided, at least a part of the prism members constituting the prism unit 11 are provided, and in the case of an example, as shown in FIG. 3, between the opposing surfaces of the prism members 11b and 11c. It is provided in a positional relationship that causes a predetermined gap Lg (in the example, around 1 [mm]). If the prism mounting surfaces 13a and 13c are provided under such conditions, heat transfer between the prism members 11b and 11c can be avoided by the heat insulating mechanism of the gap Lg, so that the heat resistance of the entire prism unit 11 can be improved. , There is an advantage that heat resistance measures can be easily taken.

As a result, the prism unit 11 in which the prism members 11a, 11b, and 11c are combined is configured. Then, the assembled prism unit 11 and the support block portion 13 are fixed by attaching the ring attachment portion 52 of the support block portion 13 to the front surface 12f of the support ring portion 12 by using the fixture 51. As a result, the unit support portion 3s in which the support block portion 13 and the support ring portion 12 are integrated is configured, and the prism unit 11 is fixed on the support ring portion 12. Further, the support ring portion 12 is fitted into the connection port 33 of the relay lens portion Ur, and the above-mentioned assembly is performed. Thereby, the rotation support mechanism portion 3 can be formed.

In this way, when the rotation support mechanism portion 3 is configured, the support ring portion 12 that is rotatably fitted to the front end of the relay lens portion Ur (lens portion U1) at the rear Fsr in the optical traveling direction, and the support ring portion 12 If the unit support portion 3s is provided and has the support block portion 13 that supports the optical conversion unit portion 2, the unit support portion 3s can be retrofitted to the relay lens portion Ur without changing the optical device main body portion Mm. Therefore, it is excellent in ease of implementation and low cost, and has an advantage that versatility and expandability can be enhanced.

As described above, the optical conversion unit unit 2 that makes the light emitting axis So parallel to the light input axis Si by reflecting the incoming light C in a direction offset with respect to the light input axis Si and then rereflecting the light C. It is possible to obtain a basic form of an angle adjusting device 1 including a rotation support mechanism unit 3 that rotatably displaces and fixes the optical conversion unit 2 about the optical axis Si.

Next, an example of a suitable optical system Mc using the angle adjusting device 1 according to the present embodiment will be described with reference to FIGS. 7 to 9.

It is assumed that the angle adjusting device 1 is attached to the front end of the relay lens portion Ur. Further, as shown in FIG. 9, the angle adjusting device 1 covers the entire surface with the casing 61, and the lens portion U2 is located in front of the casing 61, that is, in front of the optical conversion unit 2 in the optical direction Fsf. The projection lens unit Ue that constitutes the above is arranged. As described above, the projection lens unit provided in the optical device M can be used for the projection lens unit Ue. In this way, if the projection lens unit Ue is used as the lens unit U2, the projection lens unit Ue can be designed as a dedicated projection lens for the optical conversion unit unit 2, so that the projection lens unit Ue, the optical conversion unit unit 2, and the optical conversion unit unit 2 are further designed. Has the advantage of being able to construct an optimum optical system Mc that matches the lens shift mechanism unit 15.

On the other hand, the optical conversion unit unit 2 is provided with a lens shift mechanism unit 15 that displaces the projection lens unit Ue in the optical direction forward Fsf in the horizontal direction and / or the vertical direction. As shown in FIG. 9, the illustrated lens shift mechanism unit 15 supports the vertical shift plate mechanism 65 that supports the projection lens unit Ue and the vertical shift plate mechanism 65 so as to be movable in the vertical direction (vertical direction). A lateral shift plate mechanism 66 and a foundation plate 67 that supports the lateral shift plate mechanism 66 so as to be movable in the lateral direction (horizontal direction) are provided, and the foundation plate 67 is attached to the front end of the casing 61. Reference numeral 68 denotes a vertical rotation drive unit using an electric motor or the like provided in the vertical shift plate mechanism 65, and 69 indicates a horizontal rotation drive unit using an electric motor or the like provided in the horizontal shift plate mechanism 66.

Therefore, if such a lens shift mechanism unit 15 is provided, the position with respect to the projection screen can be adjusted. Therefore, even if the position of the projection screen shifts due to the angle adjustment by the angle adjusting device 1. There is an advantage that the deviation of the position due to the angle adjusting device 1 can be easily eliminated.

Next, the functions and usage of the angle adjusting device 1 according to the present embodiment will be described with reference to FIGS. 1 to 10.

It is assumed that the optical system Mc shown in FIG. 9 to which the angle adjusting device 1 is assembled is configured, and that the optical system Mc is used for the optical device M (projector). In this case, the existing projection lens (interchangeable lens) provided in the optical device M is removed, and the optical system Mc shown in FIG. 9 is attached instead. The projection lens unit Ue (lens unit U2) used when using the angle adjusting device 1 may be prepared in advance as a dedicated projection lens unit Ue, or the projection lens removed from the optical device M may be projected. It may be used as a lens unit Ue. Further, when the optical system Mc shown in FIG. 9 is attached to the optical device M, the mount portion 30 provided in the relay lens portion Ur may be attached to the mount portion 22 provided inside the cabinet 21 of the optical device M.

Next, the optical device M is installed at a desired location. In the example, the optical device M shall be installed on the ceiling using a support capable of suspending. The support used at this time does not have an angle adjusting mechanism that adjusts the angle by rotating it around the optical axis. That is, a support having a relatively simple structure capable of adjusting the angle only in the swing direction can be used.

FIG. 10 shows a front view of the angle adjusting device 1 according to the present embodiment provided in the installed optical device M with virtual lines 1s, and shows a projection screen projected on the screen by the optical device M with virtual lines 100s. ing.

First, when the optical device M is activated, the light emitted from the display panel unit 23 enters the relay lens unit Ur and is transmitted through the relay lens unit Ur. Due to the function of the relay lens unit Ur, the actual position of the display panel unit 23 becomes the front Fsf in the optical traveling direction, that is, the front of the optical device main body Mm with respect to the actual arrangement position Xs of the display panel unit 23. It is transferred to the outside. As a result, the light emitted from the display panel unit 23 is directly input to the optical conversion unit unit 2 arranged in front of the relay lens unit Ur.

The magnification of the illustrated relay lens unit Ur is 0.5 times, and the image displayed by the emitted light emitted from the substantial position of the display panel unit 23 is the display panel unit at the actual arrangement position Xs. It is reduced to 0.5 times the image displayed by the emitted light emitted from 23.

Further, the image emitted from the relay lens unit Ur enters the prism unit 11 constituting the angle adjusting device 1 and passes through the prism unit 11. That is, as shown in FIG. 4, the image (light C) enters the prism member 11a in the horizontal direction, exits upward in the perpendicular direction by the reflecting surface of the prism member 11a, and enters the next prism member 11b. To do. Since the prism member 11b has a different orientation with respect to the prism member 11a, the incident light entering the prism member 11b is reflected to the right in the horizontal direction by the reflecting surface of the prism member 11b. Further, the light emitted from the prism member 11b enters the next prism member 11c. Since the prism member 11c has a different orientation with respect to the prism member 11b, the incident light entering the prism member 11c is reflected forward in the horizontal direction by the reflecting surface of the prism member 11c.

In this case, the image emitted from the prism member 11c is an image rotated by 90 [°] with respect to the image entering the prism member 11a, but in the optical device main body Mm, the image emitted from the prism member 11c is Signal processing is performed on the video signal so that the angle is the same as that of the regular video.

Further, the emitted light emitted from the prism member 11c passes through the lens shift mechanism unit 15. The lens shift mechanism unit 15 adjusts the shift of the screen position with respect to the images in the X direction (horizontal direction) and the Y direction (vertical direction). Further, the image that has passed through the lens shift mechanism unit 15 enters the projection lens unit Ue and is transmitted through the projection lens unit Ue. The image transmitted through the projection lens unit Ue is displayed on the screen by the projection screen shown by the virtual line 100s. This image is adjusted by various adjustment mechanisms including a zooming adjustment mechanism and a focusing adjustment mechanism provided in the projection lens unit Ue.

By the way, the projection screen shown by the virtual line 100s in FIG. 10 is inclined downward to the right by about 20 [°] with respect to the horizontal in the figure. This inclination can be adjusted by using the angle adjusting device 1 according to the present embodiment.

That is, the position Xps of the angle adjusting device 1 indicated by the virtual line 1s is rotated in the arrow direction by the angle Qs (approximately 20 [°]) by using the rotation operating means that can be configured by the manual type or the automatic type described above. Displace. As a result, the angle adjusting device 1 is rotationally displaced to the position Xpa indicated by the solid line, and the light emitting prism member 11c is displaced (swivel displacement) by the angle Qs from the position 11cs indicated by the virtual line to the position 11ca indicated by the solid line.

As a result, the projection screen shown by the virtual line 100s is also displaced from the position Xss by an angle Qs, and the vertical position and the horizontal position are also displaced due to the turning displacement of the prism member 11c. Since the displacement of this position can be corrected by the lens shift mechanism 15, the angle can be finally adjusted to displace the projection screen shown by the solid line 100a to the position Xsa of the projection screen, and the inclined projection screen shown by the virtual line 100s can be adjusted. , It can be set on the projection screen shown by the solid line 100a which is the regular position and angle. The above is the process related to the angle adjustment using the angle adjusting device 1.

As described above, according to the angle adjusting device 1 according to the present embodiment, as a basic configuration, the light C is arranged between the relay lens unit Ur and the projection lens unit Ue along the optical axis in the optical system Mc and receives light. The optical conversion unit 2 and the optical conversion unit 2 that make the optical axis So parallel to the optical axis Si by reflecting the light in a direction offset with respect to the optical axis Si and then re-reflecting the light are reflected. Since the optical conversion unit unit 2 is provided with a rotation support mechanism unit 3 that can rotate and displace and support the optical axis Si about the optical axis Si, basically, the optical conversion unit unit 2 is 360 [°] about the optical axis Si. Since it can be rotationally displaced, the angle can be adjusted even if the place where the optical device M such as a projector is installed is, for example, a ceiling inclined at 45 [°] or the side surface of a support column in a room. It is possible to realize a wide angle adjustment range that can be used in various installation locations. Further, when adjusting the angle, it is sufficient to rotate some of the parts constituting the optical system Mc, so that an easy and accurate adjustment process can be realized. Moreover, since it does not affect the rigidity and strength of the support mechanism such as the hanging bracket, the original rigidity and strength of the support mechanism can be secured, the adjustment angle is less likely to shift even in long-term use, and the durability and reliability of the support mechanism. It can also contribute to the improvement of sex.

Although the preferred embodiment has been described in detail above, the present invention is not limited to such an embodiment, and the present invention does not deviate from the gist of the present invention in terms of detailed configuration, shape, material, quantity, numerical value, and the like. It can be changed, added, or deleted as desired within the range.

For example, when the rotation support mechanism portion 3 is configured, a support ring portion 12 that is rotatably fitted to the front end of the lens portion U1 in the rearward Fsr in the optical direction, and an optical conversion unit portion 2 that is provided on the support ring portion 12 and is provided on the support ring portion 12. Although an example is shown in which the unit support portion 3s having the support block portion 13 for supporting the lens portion 13 is provided, it can be implemented in various forms corresponding to the tip form of the lens portion U1. On the other hand, it is arbitrary whether or not the relay lens unit Ur has a variable magnification function. Further, although the projection lens unit Ue is used for the lens unit U2 of the front Fsf in the phototravel direction, the use of the lens units U1 and U2 using other types is not excluded, and in the example, the optical conversion unit unit. Although one lens unit U1 and U2 are arranged before and after 2, a plurality of types of lens units U1 ... And U2 ... may be arranged before and after each. On the other hand, although the case where the support block portion 13 is provided with the prism mounting surfaces 13a and 13c for supporting the prism members 11a and 11c, a third prism mounting surface for fixing and supporting the prism members 11b is provided. Alternatively, although a predetermined gap Lg is provided between the facing surfaces of the prism members 11b and 11c, it is not always necessary to provide the gap Lg when there is no need for heat insulation. Further, although it is desirable to provide the lens shift mechanism portion 15, it is not necessarily an indispensable component.

The angle adjusting device according to the present invention can be used for various optical devices having the same projection function, including various projectors.

1: Angle adjusting device for optical equipment, 2: Optical conversion unit, 3: Rotational support mechanism, 3s: Unit support, 11: Prism unit, 11a: Prism member, 11b: Prism member, 11c: Prism member, 12: Support ring part, 13: Support block part, 13a: Prism mounting surface, 13c: Prism mounting surface, 15: Lens shift mechanism part, M: Optical equipment, Mc: Optical system, Mm: Optical equipment body part, Lg: Predetermined gap, U1: Prism part, U2: Lens part, Ur: Relay lens part, Ue: Projection lens part, C: Light, Si: Light input axis, So: Light output axis, Fsr: Light advance direction rear, Fsf: Light advance Direction forward

Claims (6)

An angle adjusting device for an optical device that adjusts an angle centered on an optical axis with respect to an optical device including an optical system and an optical device main body excluding the optical system, which is along the optical axis in the optical system. By arranging it in the middle of at least two lens units and combining three prism members, the incoming light is reflected in a direction offset with respect to the incoming axis and then re-reflected to make the incoming light. An optical conversion unit unit using a prism unit parallel to the axis, a rotation support mechanism unit that supports the optical conversion unit unit so as to be rotatable and displaceable and fixed with the light input axis as a fulcrum, and the above. An angle adjusting device for an optical device, characterized in that the two lens portions include a relay lens portion used for the lens portion rearward in the optical traveling direction. The rotation support mechanism portion includes a support ring portion that is rotatably fitted to the front end of the lens portion in the rearward direction in the optical direction, and a support block portion that is provided on the support ring portion and supports the optical conversion unit portion. The angle adjusting device for an optical device according to claim 1, further comprising a unit support portion having the unit. The angle adjusting device for an optical device according to claim 2, wherein the support block portion has a prism mounting surface that supports the prism member. The angle adjusting device for an optical device according to claim 3, wherein the prism mounting surfaces are provided in a positional relationship that creates a predetermined gap between at least a part of the facing surfaces of the prism members. The optical device according to claim 1, wherein the optical conversion unit unit is provided with a lens shift mechanism unit that displaces the lens unit in the front in the light advance direction in the horizontal direction and / or the vertical direction. For angle adjustment device. The angle adjusting device for an optical device according to claim 5, wherein the lens portion in front of the phototravel direction uses a projection lens portion.

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